JP2014163428A - Laminated member, manufacturing method of laminated member, bearing pad using laminated member, bearing device having bearing pad and rotary machine including bearing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated member capable of detecting surface temperature of the laminated member with high accuracy.SOLUTION: A laminated member includes a laminated member body having a first layer 51 forming a layer shape, and a second layer 52 integrally provided at a rear face of the first layer 51 and comprising a material having thermal conductivity higher than that of the first layer 51. A hole part 53 dented from the surface of the laminated member body is formed. The laminated member includes an insulation holder 54 fitted inside the hole part 53 so that the surface becomes flush with the first layer 51 and comprising a material which is the same as that of the first layer 51, and a heat detection part 55 for detecting the surface temperature in the inner side of the insulation holder 54.

Description

  The present invention relates to a laminated member, a method for producing the laminated member, a bearing pad using the laminated member, a bearing device having the bearing pad, and a rotary machine including the bearing device.

  Journal bearings and thrust bearings that support rotating shafts that rotate at high speed, such as steam turbines and compressors, do not damage the rotating shaft when foreign matter adheres to the pad surface of the bearing pad that supports the rotating shaft. Bearing material is used. As such a bearing material, for example, a material using a white metal or a resin material is used. In particular, resin materials are used in many bearing pads in recent years because they have a higher heat-resistant temperature than white metal.

  By the way, in such a bearing device, lubricating oil is interposed between the rotating shaft and the pad surface of the bearing pad, and this lubricating oil improves slidability and removes frictional heat. Yes. However, in the case of high load, high peripheral speed, or when the lubricating oil runs out or foreign matter enters between the rotating shaft and the pad surface, the rotating shaft and the pad surface contact each other without using the lubricating oil. Then, the temperature of the pad surface suddenly rises and becomes abnormally high. For this reason, in the bearing device, the temperature of the pad surface is measured by a thermal sensor embedded in the bearing pad to monitor whether the pad surface is at an abnormal temperature.

  For example, Patent Document 1 discloses a temperature measurement device in which a temperature detection member is fitted in a hole that is drilled to penetrate a bearing pad so as to be relatively movable. In this temperature measurement device, the temperature of the pad surface is measured by measuring the temperature of the temperature detection end face with a thermocouple of the temperature detection member. That is, since the temperature detection end surface of the temperature detection member is arranged at the position of the pad surface of the bearing pad, the temperature of the pad surface is conducted to the temperature detection member, and the thermocouple is connected from the back surface opposite to the pad surface. Measure the temperature of the pad surface.

Japanese Patent No. 4981413

  By the way, when using white metal or the like, since the thermal conductivity is high, even if the temperature is measured from a back metal integrally formed on the back surface of the white metal or the like, the temperature of the pad surface can be measured without causing a large error. However, the resin material has a very low thermal conductivity compared to a metal material such as white metal. Therefore, when trying to measure the temperature in a similar manner using a resin material, the temperature of the pad surface is insulated by the resin material layer formed on the surface of the bearing pad, and the back metal on the back surface of the resin material is sufficient. Not conducted. Therefore, the temperature detected by the back metal becomes a value lower than the surface temperature and is largely deviated.

  Thus, in the case of a bearing device using a resin material, a method of directly detecting the temperature of the pad surface by making a hole up to the surface as in Patent Document 1 is used. However, even in such a method, heat escapes from the hole provided on the surface to the back surface, and the temperature around the hole is reduced compared to other pad surfaces where no hole is provided, A difference occurs in the temperature of the surface to be detected, and there is a problem that the temperature of the surface of the bearing pad that is a laminated member cannot be detected with high accuracy.

  The present invention has been made to solve the above-described problem, and uses a laminated member capable of detecting the temperature of the surface of the laminated member with high accuracy, a method for manufacturing the laminated member, and the laminated member. An object of the present invention is to provide a bearing pad, a bearing device having the bearing pad, and a rotating machine including the bearing device.

In order to solve the above problems, the present invention proposes the following means.
A laminated member according to one embodiment of the present invention includes a first layer that is layered, and a second layer that is integrally provided on the back surface of the first layer and is made of a material having higher thermal conductivity than the first layer. The same material as that of the first layer. The hole is recessed from the surface of the laminate member body, and is fitted into the hole so that the surface is flush with the first layer. And a heat detection unit for detecting the temperature of the surface inside the heat insulation holder.

  According to such a structure, a heat insulation holder is engage | inserted by a hole, and a hole can be plugged up with the heat insulation holder comprised with the same material as the 1st layer. Therefore, it can be prevented that the heat of the surface of the first layer escapes through the hole toward the second layer side of the laminated member and the temperature of the surface of the first layer around the hole is lowered. In addition, since the first layer and the heat insulating holder are made of the same material and have the same thermal conductivity, the temperature of the surface of the heat insulating holder and the temperature of the surface of the first layer can be made almost the same. Therefore, the temperature of the surface of the heat insulation holder can be measured and detected by measuring the temperature of the surface of the heat insulation holder with a heat detector that detects the temperature of the surface of the heat insulation holder. Thereby, the temperature of the surface of the laminated member can be detected with high accuracy.

  Furthermore, in the laminated member according to another aspect of the present invention, the hole includes a large-diameter hole formed on the surface side of the first layer, and the second-layer side of the large-diameter hole. The large-diameter hole portion is formed integrally with a small-diameter hole portion having a smaller diameter than the large-diameter hole portion, and the outer peripheral surface of the heat insulating holder has a shape corresponding to the large-diameter hole portion. A first step portion disposed on the surface side of the first layer and a shape corresponding to the small-diameter hole portion and provided integrally with the first step portion on the second layer side than the first step portion And having a second step portion arranged corresponding to the small diameter hole portion.

  According to such a configuration, the large-diameter hole portion formed on the surface side of the first layer, and the small-diameter hole portion disposed on the second layer side than the large-diameter hole portion and having a smaller diameter than the large-diameter hole portion, The hole is formed in a stepped shape and reduced in diameter as it goes to the second layer side. And since the heat insulation holder has the 1st step part and the 2nd step part which are the shape corresponding to a hole, a heat insulation holder also makes a step shape as it goes to the 2nd layer side, and reduces diameter. Formed. Therefore, even if the heat insulation holder receives a force from the surface of the first layer so that the heat insulation holder is pushed into the second layer, the first step portion of the heat insulation holder is supported by the boundary between the large diameter hole portion and the small diameter hole portion of the hole portion. Thus, the surface of the heat insulating holder and the surface of the first layer can be kept flush with each other. Thereby, it becomes possible to stably detect the temperature of the surface of the laminated member.

  Furthermore, in the laminated member according to another aspect of the present invention, the heat insulating holder is disposed on the inner side so as to be covered with the exterior part made of the same material as the first layer, and from the exterior part. The heat detection part detects the temperature of the surface through the heat conductor.

  According to such a configuration, since the temperature at the surface of the first layer is indirectly detected through the heat conductor, it is not necessary to provide a heat detection unit flush with the surface of the first layer. Therefore, even if the surface of the first layer is worn slightly and worn or scratched, the heat detection part will not be damaged, so the temperature of the surface of the first layer can be detected stably. It becomes possible.

  Moreover, the bearing pad which concerns on 1 aspect of this invention is a bearing pad which has the said laminated member, and the said surface is made into a pad surface, Comprising: Said 1st layer is comprised with the resin material, said 2nd The layer is characterized by being composed of a metallic material.

  According to such a configuration, the laminated member is a bearing pad in which the first layer is configured with a resin material and the second layer is configured with a metal material, so that the pad surface is configured with a resin material with low thermal conductivity. Even with a bearing pad that has been made, it is possible to easily detect the temperature of the pad surface that is the surface of the first layer with high accuracy.

  A bearing device according to an aspect of the present invention includes the bearing pad.

  According to such a configuration, the temperature of the pad surface can be detected with high accuracy and the pad surface can be managed at an appropriate temperature.

  Furthermore, the rotary machine which concerns on 1 aspect of this invention is equipped with the said bearing apparatus, The rotary machine characterized by the above-mentioned.

  According to such a configuration, it is possible to use a bearing device capable of detecting the temperature of the pad surface with high accuracy and managing the pad surface at an appropriate temperature, and thus it is possible to operate stably.

  Moreover, the manufacturing method of the laminated member which concerns on 1 aspect of this invention is provided from the material which is integrally provided in the back surface of the 1st layer which makes layered, and this 1st layer, and has higher heat conductivity than this 1st layer. In the laminated member body having the second layer, a hole forming step for forming a hole recessed from the surface of the first layer, and a heat insulating holder made of the same material as the first layer are fitted into the hole A heat detector for attaching a holder attaching step, a smoothing step for smoothing the surfaces of the heat insulating holder and the first layer to be flush with each other, and a heat detecting portion for detecting the temperature of the surface inside the heat insulating holder And an attachment step.

  According to such a process, the heat insulating holder and the surface of the first layer can be easily flushed by removing the portion protruding from the surface of the first layer after the heat insulating holder is fitted in the smoothing process. Can do. Accordingly, it is possible to easily manufacture a laminated member in which the surface of the heat insulating holder is flush with the surface of the first layer and the temperature of the surface of the first layer is detected by the heat detection unit.

  According to the laminated member of the present invention, since the temperature can be detected by the heat detector while suppressing the decrease in the surface temperature by the heat insulating holder, the surface temperature can be accurately detected.

1 is a schematic cross-sectional view showing a steam turbine according to a first embodiment of the present invention. It is a schematic sectional drawing explaining the journal bearing apparatus used for the steam turbine which concerns on 1st embodiment of this invention. It is sectional drawing to which the A area | region of FIG. 1 explaining the laminated member which concerns on 1st embodiment of this invention was expanded. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram explaining the manufacturing method of the laminated member which concerns on 1st embodiment of this invention, The figure (a) is sectional drawing explaining a hole part formation process, The figure (b) shows a heat detection part in the heat insulation holder. Sectional drawing explaining the heat detection part attachment process to embed, the figure (c) is sectional drawing explaining the holder attachment process which fits a heat insulation holder, The figure (d) is sectional drawing explaining the smoothing process which smoothes the surface Is It is sectional drawing explaining the laminated member which concerns on 2nd embodiment of this invention.

Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS. 1 and 2.
A steam turbine 200 (rotary machine) according to a first embodiment of the present invention will be described with reference to FIG. Here, the steam turbine 200 is an external combustion engine that extracts the energy of the steam F as rotational power, and is used by being connected to a generator or the like in a power plant.

As shown in FIG. 1, the steam turbine 200 includes a turbine casing 300, a rotating shaft 2 extending along the axis O so as to penetrate the turbine casing 300, a stationary blade 600 held in the turbine casing 300, and rotation A moving blade 700 provided on the shaft 2 and a bearing portion 1 that supports the rotating shaft 2 so as to be rotatable around the axis O are provided.
The bearing portion 1 includes a journal bearing device 11 (hereinafter simply referred to as a bearing device 11) and a thrust bearing device 12.

  In such a steam turbine 200, the steam S introduced into the turbine casing 300 passes through the flow path between the stationary blade 600 and the moving blade 700. At this time, when the steam S rotates the moving blade 600, the rotating shaft 2 rotates with the moving blade 600, and power (rotational energy) is transmitted to a machine such as a generator connected to the rotating shaft 2. The

Next, the journal bearing device 11 will be described with reference to FIG.
As shown in FIG. 2, the journal bearing device (bearing device) 11 includes an annular bearing housing 4, a support member 3 provided on the inner peripheral surface of the bearing housing 4, and swingable to each support member 3. And a supported bearing pad 5a. That is, the support member 3 is interposed between the bearing pad 5 a and the bearing housing 4. The bearing pad 5a is the laminated member 5 in the present embodiment, and is divided in the circumferential direction. In the present embodiment, the bearing pad 5 a is divided into four parts, and each bearing pad 5 a is supported by the support member 3.
The support member 3 is not limited to point support as in this embodiment, and may be line support, for example.

  The bearing pad 5a supports the outer periphery of the rotating shaft 2 with a pad surface 51a of the bearing pad 5a through a lubricating oil (not shown). As shown in FIG. 3, the bearing pad 5 a includes a first layer 51 whose surface is a pad surface 51 a, a second layer 52 integrally provided on the back surface side of the first layer 51, and a first layer 51. A hole 53 formed by being recessed from the pad surface 51a, which is a surface of the heat insulating member, a heat insulating holder 54 fitted into the hole 53, and a heat detecting unit 55 for detecting the surface temperature inside the heat insulating holder 54. Yes.

The first layer 51 is made of a resin material, and forms a layer shape to form a pad surface 51 a of the bearing pad 5 a that is the surface of the laminated member 5. That is, the surface of the first layer 51 is a pad surface 51a and is exposed to the lubricating oil interposed between the rotary shaft 2 and the bearing pad 5a.
The second layer 52 is a backing metal of the bearing pad 5 a that is provided integrally with the first layer 51 on the back side of the first layer 51 to form a laminated member body together with the first layer 51. That is, the second layer 52 is made of a metal material that has a higher thermal conductivity than the resin material of the first layer 51.

The hole 53 is formed so as to penetrate from the surface of the first layer 51 which is the pad surface 51 a of the bearing pad 5 a to the second layer 52. The hole 53 includes a large-diameter hole 53a formed on the surface side of the first layer 51 and a small-diameter hole formed integrally with the large-diameter hole 53a on the second layer 52 side of the large-diameter hole 53a. 53b, and the diameter of the second layer 52 is reduced in a stepped manner at the boundary between the large diameter hole portion 53a and the small diameter hole portion 53b.
The large-diameter hole 53 a is a hole 53 having a circular cross section that is recessed from the pad surface 51 a that is the surface of the first layer 51 to the middle of the second layer 52.
The small-diameter hole 53b has a circular cross section with a smaller diameter than the large-diameter hole 53a, and is disposed closer to the second layer 52 than the large-diameter hole 53a. That is, the small-diameter hole 53b penetrates the laminated member main body having the first layer 51 and the second layer 52, which are coaxially integrated with the large-diameter hole 53a having different diameters.

  The heat insulating holder 54 is made of a resin material that is the same material as the first layer 51 and is fitted in the hole 53 so that the surface is flush with the pad surface 51 a that is the surface of the first layer 51. Has been placed. The heat insulating holder 54 has a shape in which two-stage cylinders are connected in the direction of the axis O so as to correspond to the shape of the hole 53. That is, the outer peripheral surface of the heat insulating holder 54 has a shape corresponding to the large-diameter hole portion 53a and a shape corresponding to the first step portion 54a disposed on the surface side of the first layer 51 and the small-diameter hole portion 53b. And the second step portion 54b provided integrally with the first step portion 54a on the second layer 52 side of the first step portion 54a.

The first step portion 54a has a cylindrical shape corresponding to the large-diameter hole portion 53a which is the hole portion 53, and is disposed in the large-diameter hole portion 53a so as to be flush with the surface of the first layer 51. Yes. And the 1st step part 54a has the O-ring 541 as an oil seal material in the outer peripheral surface which contact | connects the inner peripheral surface in the 1st layer 51 of the large diameter hole 53a.
The second step portion 54 b has a cylindrical shape with a smaller diameter than the first step portion 54 a so as to correspond to the small diameter hole portion 53 b that is the hole portion 53. The second step portion 54b is disposed closer to the second layer 52 than the first step portion 54a, and is integrally formed coaxially with the first step portion 54a. The second step portion 54b has an outer peripheral surface in contact with the inner peripheral surface of the small-diameter hole portion 53b that is threaded, and is fixed by biting the outer peripheral surface of the screw-shaped outer peripheral surface of the small-diameter hole portion 53b. Yes.

  The heat detector 55 is a thermocouple that detects the temperature of the surface of the heat insulating holder 54 inside the heat insulating holder 54. The heat detection unit 55 is a thermocouple including two strands 55a and 55b, and the two strands 55a and 55b are embedded in the heat insulation holder 54 in advance so as to be in contact with the surface of the heat insulation holder 54. It has been. In addition, the thermocouple which comprises the heat detection part 55 should just use a well-known thermocouple.

Next, the manufacturing method of the laminated member 5 of embodiment which concerns on this invention is demonstrated with reference to FIG. 4 (a) to (d).
The manufacturing method of the laminated member 5 of this embodiment includes a first layer 51 made of a resin material and having a layer shape, and a second layer 52 made of a metal material that is integrally provided on the back side of the first layer 51. It implements with respect to the laminated member main body which has these. The manufacturing method of the laminated member 5 includes the hole forming step S1 in which the hole 53 is provided in the laminated member main body, the heat detecting unit attaching step S2 in which the heat detecting unit 55 is installed inside the heat insulating holder 54, and the hole 53. A holder mounting step for fitting the heat insulating holder 54 and a smoothing step S4 for smoothing the heat insulating holder 54 and the surface of the first layer 51 are provided.

  In the hole forming step S1, as shown in FIG. 4A, a small diameter hole 53b is formed so as to penetrate the laminated member body from the surface of the first layer 51 to the second layer 52. And after forming the small diameter hole 53b, the hole forming step S1 is large from the surface of the first layer 51 to an arbitrary depth in the middle of the second layer 52 so as to be coaxial with the small diameter hole 53b. A diameter hole 53a is formed. The depth from the first surface of the large-diameter hole 53a is determined in advance in consideration of the shape of the laminated member body, the depth of the first layer 51, and the like.

In the heat detection unit attaching step S2, as shown in FIG. 4B, a thermocouple having a contact as the heat detection unit 55 is embedded in the heat insulating holder 54 in advance. That is, the heat insulating holder 54 is molded from the same resin material as that of the first layer 51 in a state where a thermocouple having a contact which is the heat detection unit 55 is disposed inside. Further, when the heat insulating holder 54 is molded, the thermocouple is disposed and embedded so that the thermocouple is located at an arbitrary depth from the surface of the heat insulating holder 54. The arbitrary depth at which the contact that is the heat detection unit 55 is arranged is determined in advance so that the heat insulation holder 54 is arranged at the same position as the surface of the first layer 51 when the heat insulation holder 54 is fitted into the hole 53.
The heat insulating holder 54 to which the heat detection unit 55 is attached is molded so that the first stepped portion 54a has a shape higher than the depth of the large-diameter hole 53a in the hole 53 and has a hexagonal hole on the surface side. And it shape | molds so that the outer peripheral surface may make screw shape in the 2nd step part 54b of the heat insulation holder 54. FIG.

  In the heat insulating holder attaching step S3, as shown in FIG. 4C, the first step portion 54a provided with the hexagonal holes 54c protrudes from the hole portion 53 of the heat insulating holder 54 made of the same resin material as the first layer 51. The second step portion 54b is fitted and attached to the small-diameter hole portion 53b which is the outer hole portion 53. At that time, by inserting a hexagon wrench into the hexagonal hole 54 c on the top surface of the heat insulating holder 54 and rotating the outer peripheral surface on the screw of the second step portion 54 b of the heat insulating holder 54, the small diameter hole 53 b of the hole 53 is formed. The heat insulating holder 54 is inserted into the hole 53 while being engaged with the inner peripheral surface. And when heat insulation holder attachment process S3 is implemented, the top part of the heat insulation holder 54 inserted by the hole 53 will be in the state which protrudes from the surface of the 1st layer 51. FIG.

  In the smoothing step S4, as shown in FIG. 4D, the portion protruding from the surface of the first layer 51 of the heat insulating holder 54 so as to be flush with the surface of the first layer 51 is removed smoothly. That is, since the heat insulating holder 54 is a resin material, the pad surface 51a, which is the surface of the first layer 51, is removed by scraping and removing the portion protruding from the surface of the first layer 51 of the heat insulating holder 54. The thermocouple which is the heat detection part 55 is arrange | positioned so that the surface of the 1st layer 51 may be touched.

Next, the operation of the laminated member 5 of the first embodiment will be described.
According to the laminated member 5 of the first embodiment, the hole 53 can be closed with the heat insulating holder 54 made of the same resin material as the first layer 51 by fitting the heat insulating holder 54 into the hole 53. Therefore, the heat in the vicinity of the pad surface 51 a that is the surface of the first layer 51 escapes through the hole 53 toward the second layer 52 side of the bearing pad 5 a that is the laminated member 5, and around the hole 53. It can prevent that the temperature of the pad surface 51a falls. Further, since the first layer 51 and the heat insulation holder 54 are made of the same resin material and have the same thermal conductivity, heat is preferentially conducted to the heat insulation holder 54 rather than the first layer 51. Escape to the second layer 52 side can be prevented. Therefore, the temperature of the surface of the heat insulation holder 54 and the temperature of the pad surface 51a that is the surface of the first layer 51 can be made almost the same, and the thermoelectricity that is the heat detection unit 55 that detects the temperature of the surface of the heat insulation holder 54. By measuring the temperature of the surface of the heat insulation holder 54 in pairs, the temperature of the pad surface 51a can be measured and detected. Thereby, the temperature of the pad surface 51a of the bearing pad 5a which is the surface of the laminated member 5 can be detected with high accuracy.

  Also, a large-diameter hole 53a formed on the surface side of the first layer 51, and a small-diameter hole 53b that is disposed closer to the second layer 52 than the large-diameter hole 53a and has a smaller diameter than the large-diameter hole 53a Therefore, the hole 53 is formed in a stepped shape with a reduced diameter toward the second layer 52 side. And since the heat insulation holder 54 has the 1st step part 54a and the 2nd step part 54b which are the shapes corresponding to the hole 53, the heat insulation holder 54 is also stepped as it goes to the 2nd layer 52 side. To reduce the diameter. That is, the first step portion 54 a of the heat insulating holder 54 is supported by the boundary between the large diameter hole portion 53 a and the small diameter hole portion 53 b of the hole portion 53. Therefore, even if a force is received from the pad surface 51a, which is the surface of the first layer 51, so that the heat insulating holder 54 is pushed toward the second layer 52, the first step portion 54a has the large-diameter hole 53a and the small-diameter hole 53b. Therefore, the heat insulating holder 54 is not pushed into the second layer 52 side. That is, even if force is applied to the heat insulating holder 54 from the pad surface 51a side through the lubricating oil or the like, the surface of the heat insulating holder 54 and the pad surface 51a that is the surface of the first layer 51 can be kept flush. . Thereby, it is possible to stably detect the temperature of the pad surface 51a of the bearing pad 5a which is the surface of the laminated member 5.

  Furthermore, according to the bearing pad 5a which is such a laminated member 5, the laminated member 5 is a bearing pad 5a in which the first layer 51 is made of a resin material and the second layer 52 is made of a metal material. Even in the case of the bearing pad 5a in which the pad surface 51a is made of a resin material having low thermal conductivity, the temperature of the surface of the first layer 51 can be accurately measured. That is, even if the temperature of the pad surface 51a that is insulated by the resin material and the temperature of the back metal of the metal material that can be formed by the second layer 52 are greatly different, the temperature of the pad surface 51a that is the surface of the first layer 51 is highly accurate. Can be easily detected.

  Further, since the outer peripheral surface of the second step portion 54b of the heat insulating holder 54 has a screw shape, even if the small diameter hole portion 53b of the hole portion 53 has a simple circular cross-section, the second step of the heat insulating holder 54 is provided. The outer peripheral surface of the portion 54b bites into the inner peripheral surface of the small diameter hole portion 53b of the hole portion 53, and the heat insulating holder 54 can be easily fixed. Thereby, even if it is the bearing pad 5a which is the existing laminated member 5, the heat insulation holder 54 can be easily fixed only by providing the hole 53 like a through-hole which makes a simple circular cross section, and the temperature of the pad surface 51a It is possible to easily provide a structure for measuring the temperature with high accuracy later.

  Further, the first step portion 54 a of the heat insulating holder 54 has an O-ring 541 that is an oil seal material on the outer peripheral surface that is in contact with the inner peripheral surface of the large-diameter hole portion 53 a that is the hole portion 53. Lubricating oil around the pad surface 51 a that is the surface can be prevented from flowing into the laminated member 5 from between the hole 53 and the heat insulating holder 54. Therefore, it can be prevented that the lubricating oil flows into the boundary between the first layer 51 and the second layer 52 and the first layer 51 is peeled off. Further, the lubricating oil on the pad surface 51a flows out through the hole 53 and the lubricating oil on the pad surface 51a is insufficient, so that the pressure between the rotating shaft 2 is reduced and the force for supporting the rotating shaft 2 is increased. It can be prevented from decreasing.

Moreover, according to the manufacturing method of the laminated member 5 of 1st embodiment, the thermocouple which has the contact which is the heat detection part 55 with respect to the heat insulation holder 54 beforehand is embedded, and the heat insulation holder 54 with which the thermocouple was embedded is embedded. The heat insulating holder 54 can be easily attached to the bearing pad 5 a that is the laminated member 5.
Further, after the heat insulating holder 54 is fitted in the smoothing step S4, a portion protruding from the pad surface 51a which is the surface of the first layer 51 is removed, thereby providing the heat insulating holder 54 with a structure for attaching the hexagonal hole 54c and the like. Even if it removes, after attaching, the heat insulation holder 54 and the surface of the 1st layer 51 can be made flush easily. Accordingly, it is possible to easily manufacture the laminated member 5 in which the surface of the heat insulating holder 54 is flush with the surface of the first layer 51 and the temperature of the surface of the first layer 51 is detected by the heat detection unit 55. .

  Further, the steam turbine 200 which is a rotating machine includes the journal bearing device (bearing device) 11 having the bearing pad 5a which is such a laminated member 5, thereby detecting the temperature of the pad surface 51a with high accuracy. Since the bearing device 11 capable of managing 51a at an appropriate temperature can be used, stable operation is possible.

Next, the laminated member 5 of the second embodiment will be described with reference to FIG.
In the second embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof is omitted. The laminated member 5 of the second embodiment is different from the first embodiment in that the surface temperature is detected via the heat conductor 64b having high thermal conductivity.

  That is, as shown in FIG. 5, in the second embodiment, the second layer 52 is provided with a second layer through hole 52a orthogonal to the hole 53, and is inserted into the hole 53 and has a heat conductor 64b. It has the 2nd heat insulation holder 64 and the 2nd heat detection part 65 inserted in the 2nd layer through-hole 52a and detecting temperature via the heat conductor 64b.

The second heat insulating holder 64 has an exterior part 64a made of the same resin material as that of the first layer 51, and a heat conductor 64b disposed inside so as to be covered by the exterior part 64a. The second heat insulating holder 64 is inserted into the hole 53 and fixed similarly to the heat insulating holder 54 of the first embodiment.
The exterior portion 64a has the same shape as the heat insulation holder 54 of the first embodiment, but penetrates from the outer peripheral surface to the center portion recess perpendicular to the recess and a recess having a circular cross section recessed from the surface in the center portion. It differs from the heat insulation holder 54 in that a through hole 64c having a circular cross section is provided.

The heat conductor 64b is made of a metal material having a higher thermal conductivity than the resin material of the exterior portion 64a and the metal material of the second layer 52. The heat conductor 64b has a cylindrical shape so as to correspond to the recess provided in the central portion of the exterior part 64a, and is press-fitted into the recess so that the surface thereof is a flat surface with the surface of the exterior part 64a. It is.
The thermal conductivity of the heat conductor 64b is not limited to a metal material having a higher thermal conductivity than that of the outer layer 64a of the heat insulating holder 54 and higher than that of the second layer 52. It is preferable that the thermal conductivity is higher than or comparable to that of the second layer 52.

The second heat detection unit 65 is a second thermocouple including two strands 65 a and 65 b embedded in a detection unit cover 65 c made of the same resin material as the first layer 51. The detection unit cover 65 c is inserted into a through hole 64 c provided in the outer peripheral surface of the exterior part 64 a of the second heat insulating holder 64 and a through hole 64 c provided in the second layer 52.
The detection unit cover 65 c is formed in a cylindrical shape so as to correspond to the through hole 64 c provided in the exterior part 64 a of the second heat insulating holder 64 and the second layer through hole 52 a provided in the second layer 52. In addition, a part of the outer peripheral surface corresponding to the inner peripheral surface of the second layer through hole 52a has a screw shape.
The second thermocouple is arranged and embedded in the detection unit cover 65c so that the second heat detection unit 65, which is a contact made of two strands 65a and 65b, is in contact with the top surface of the detection unit cover 65c. . The second thermocouple is a known thermocouple similar to the thermocouple used in the first embodiment.

Next, the operation of the laminated member 5 of the second embodiment will be described.
According to the bearing pad 5a which is the laminated member 5 of the second embodiment, the second heat insulating holder 64 is inserted into the hole 53 formed in the laminated member 5, and then the second layer through hole of the second layer 52. The position of the second heat insulation holder 64 is adjusted so that 52a and the through hole 64c of the second heat insulation holder 64 coincide. The detection unit cover 65 c is inserted from the second layer through hole 52 a and is also inserted through the through hole 64 c of the second heat insulating holder 64. Thereafter, the detection unit cover 65c is fixed to the second layer through hole 52a by the outer peripheral surface forming the screw shape of the detection unit cover 65c. When the detection unit cover 65c is fixed, the top surface of the detection unit cover 65c on which the second heat detection unit 65, which is the second thermocouple, is in contact with the side surface of the heat conductor 64b of the second heat insulation holder 64. It will be in the state.
In such a state, when the temperature of the pad surface 51a which is the surface of the first layer 51 rises, heat is conducted from the surface of the heat conductor 64b of the second heat insulating holder 64, and the temperature of the heat conductor 64b and the pad surface The temperature of 51a is almost the same. Therefore, the temperature of the pad surface 51a that is the surface of the first layer 51 can be detected by detecting the temperature of the heat conductor 64b by the second heat detection unit 65 disposed on the face of the detection unit cover 65c. .

  According to the bearing pad 5a which is such a laminated member 5, the temperature of the pad surface 51a which is the surface of the first layer 51 is indirectly detected through the heat conductor 64b. It is not necessary to provide the second heat detection unit 65, which is the second thermocouple, at a position flush with the surface. Therefore, even if the pad surface 51a is worn slightly and worn or scratched, the second heat detector 65 will not be damaged, and the temperature of the pad surface 51a can be detected stably. It becomes.

  Moreover, since it is not necessary to provide the 2nd heat detection part 65 in the heat insulation holder 54 directly, the 2nd thermocouple which has a contact which is the 2nd heat detection part 65 can be replaced | exchanged easily with the detection part cover 65c. Therefore, it is easily maintained when the second thermocouple having a contact that is the second heat detection unit 65 appropriate for the temperature or environment to be measured is replaced or when the contact that is the second heat detection unit 65 is damaged. Inspection can be performed.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations of the embodiments in the embodiments are examples, and the addition and omission of configurations are within the scope not departing from the gist of the present invention. , Substitutions, and other changes are possible. Further, the present invention is not limited by the embodiments, and is limited only by the scope of the claims.

The laminated member 5 in the present embodiment is not limited to being the bearing pad 5a, that is, the first layer 51 is made of a resin material and the second layer 52 is made of a metal material. It is not limited to what is. For example, if the first layer 51 has a lower thermal conductivity than the second layer 52, both the first layer 51 and the second layer 52 may be made of a resin material, or may be made of a metal material. good.
Further, the heat detection unit 55 does not need to be a thermocouple directly embedded in the heat insulating holder 54, and a known thermocouple in which a strand is covered with an exterior member is embedded from the back side of the second layer 52. May be. At that time, it is preferable that the heat conductivity of the outer member of the thermocouple is approximately the same as that of the heat insulating holder 54 so that the heat of the surface of the first layer 51 does not escape through the outer member of the thermocouple.
Furthermore, the fixing method of the heat insulating holder 54 to the hole 53 is not limited to the heat insulating holder 54 having a screw-like outer peripheral surface as in the present embodiment. It is sufficient that the heat insulating holder 54 is simply press-fitted into the hole 53.
Further, the bearing device having the bearing pad 5a in the present embodiment is not limited to the journal bearing device 11, and may be, for example, a thrust bearing device 12, a tilting bearing device, or a fixed surface bearing device.

DESCRIPTION OF SYMBOLS 11 ... Journal bearing apparatus 2 ... Rotating shaft 3 ... Supporting member 4 ... Bearing housing 5 ... Laminated member 5a ... Bearing pad 51 ... First layer 51a ... Pad surface 52 ... Second layer 53 ... Hole 53a ... Large diameter hole 53b ... Small-diameter hole 54 ... Heat insulation holder 54a ... First step part 541 ... O-ring 54b ... Second step part 55 ... Heat detection part S1 ... Hole part formation process S2 ... Heat detection part attachment process S3 ... Heat insulation holder attachment process S4 ... Smoothing process 54c ... Hexagonal hole 64 ... Second heat insulating holder 64a ... Exterior part 64b ... Heat conductor 64c ... Through hole 65 ... Second heat detection part 65c ... Detection part cover 52a ... Second layer through hole 200 ... Steam turbine O ... Axis 300 ... Turbine casing F ... Steam 400 ... Regulating valve 500 ... Rotor 600 ... Stator blade 700 ... Rotor blade 800 ... Bearing portion 310 ... Cut plate outer ring Chromatography data) 410 ... control valve chamber 420 ... valve body 430 ... valve seat 440 ... steam chamber 610 ... hub shroud 510 ... Disk 1 ... bearing unit 12 a thrust bearing device

Claims (7)

A layered first layer,
A laminated member body provided integrally with the back surface of the first layer and having a second layer made of a material having a higher thermal conductivity than the first layer;
A hole recessed from the surface of the laminated member body is formed,
A heat-insulating holder made of the same material as the first layer, and fitted in the hole so that the surface of the first layer is flush with the first layer;
A laminated member, comprising: a heat detector that detects the temperature of the surface inside the heat insulating holder. The hole is a large-diameter hole formed on the surface side of the first layer;
The large-diameter hole portion is formed integrally with the large-diameter hole portion on the second layer side than the large-diameter hole portion, and has a small-diameter hole portion having a smaller diameter than the large-diameter hole portion,
The outer peripheral surface of the heat insulating holder has a shape corresponding to the large-diameter hole portion and a first step portion disposed on the surface side of the first layer;
A second step portion formed in a shape corresponding to the small-diameter hole portion and provided integrally with the first step portion on the second layer side than the first step portion, and disposed corresponding to the small-diameter hole portion. The laminated member according to claim 1, wherein The heat insulating holder includes an exterior part made of the same material as the first layer;
It is arranged inside so as to be covered by the exterior part, and has a heat conductor having a higher thermal conductivity than the exterior part,
The laminated member according to claim 1, wherein the heat detection unit detects a temperature of the surface through the thermal conductor. A bearing pad comprising the laminated member according to any one of claims 1 to 3, wherein the surface is a pad surface,
The first layer is made of a resin material,
The bearing pad, wherein the second layer is made of a metal material.   A bearing device comprising the bearing pad according to claim 4.   A rotary machine comprising a bearing device having the bearing pad according to claim 5. A layered first layer,
In the laminated member main body provided integrally with the back surface of the first layer and having a second layer made of a material having higher thermal conductivity than the first layer,
A hole forming step for forming a hole recessed from the surface of the first layer;
A holder mounting step of fitting a heat insulating holder made of the same material as the first layer into the hole,
A smoothing step of smoothing the surfaces of the heat insulating holder and the first layer so as to be flush with each other;
And a heat detecting part attaching step for attaching a heat detecting part for detecting the temperature of the surface inside the heat insulating holder.

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