JP2017040186A - Fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid machine which has a divided case and does not need a gasket on a mating surface of the casing.SOLUTION: A fluid machine is a pump 1 including a lower casing 21 and an upper casing 22 which are coupled to form a casing 2. The fluid machine includes: clamp members 51, 52 which sandwich flanges 211F, 212F of the lower casing 21 and flanges 221F, 222F of the upper casing 22 with the lower casing 21 and the upper casing 22 coupled at their flanges; and elastic members 61, 62 provided between the clamp members 51, 52 and the flanges.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fluid machine such as a pump, and more particularly to a fluid machine in which a casing is divided into divided casings, and the divided casings are combined with each other to form the casing.

  A fluid circulates inside the casing of the fluid machine. For example, in a pump that handles a liquid, the liquid sucked from the suction port gives pressure and kinetic energy to the liquid by the centrifugal force of the impeller and the lift force of the blade, and is discharged from the discharge port, whereby the liquid circulates inside the casing. In general, a pump has a structure in which parts in a casing such as a shaft seal and an impeller need regular maintenance, and thus the casing can be divided and maintenance can be easily performed.

  8 is a perspective view of a conventional horizontal-axis double suction centrifugal pump, FIG. 9 is a left side view of FIG. 8, FIG. 10 is a front view of FIG. 8, and FIG. FIG. 12 is a cross-sectional view taken along the line BB of FIG. As shown in FIGS. 8-12, the casing 110 which comprises the external shape of the horizontal-axis double suction vortex pump 100 consists of a some division | segmentation casing. Specifically, the casing 110 has a structure in which the casing 110 is divided into two horizontally on a plane including the rotation axis and is divided into a lower casing 111 and an upper casing 112.

  A gasket may be attached to the mating surface of the lower casing 111 and the upper casing 112 of the pump 100 in order to prevent leakage of liquid from the inside of the casing 110. As this type of gasket, ring-shaped, string-shaped, and sheet-shaped gaskets are known.

Japanese Patent No. 4885253

  In the pump 100 in which the gasket is mounted on the mating surface of the lower casing 111 and the upper casing 112, it is necessary to perform the groove processing for the gasket on the lower casing 111 and / or the upper casing 112, which increases processing costs.

  Also, rubber string gaskets need to be replaced periodically because water leaks due to deterioration over time. At that time, in the conventional pump 100, the work of removing the heavy upper casing 112 is necessary, and the replacement work is not easy.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a fluid machine in which a casing is divided and a gasket is not required on a mating surface of the casing.

  A fluid machine according to an aspect of the present invention is a fluid machine including a first divided casing and a second divided casing, and the first divided casing and the second divided casing are combined to form a casing. A clamp member sandwiching the flange of the first split casing and the flange of the second split casing in a state where the first split casing and the second split casing are combined by the respective flanges; And an elastic member provided between the clamp member and the flange.

  This configuration eliminates the need for a gasket, eliminates the need for gasket groove processing for the first and second divided casings, and simplifies the casing shape. Further, if the clamp member is removed, the elastic member can be removed, and the replacement is easy even when the elastic member has deteriorated over time. Moreover, since an elastic member exists between the clamp member and the flange, it is possible to avoid contact of different materials between the clamp member and the flange. Furthermore, since the clamp member sandwiches the flange of the first split casing and the flange of the second split casing, the first split casing and the second split casing are brought into close contact with and fixed by those flanges, There is no need to fasten the flanges with casing bolts, and the flanges can be reduced in size and thickness, thereby reducing the weight of the fluid machine. Moreover, the installation work of a casing can be simplified by reducing a casing bolt. Furthermore, since the divided casing is fixed by the clamp member, the divided casing is not easily broken even if the internal pressure of the fluid machine increases.

  In the fluid machine, the clamp member may be fixed to the flange of the first divided casing and the flange of the second divided casing with a bolt.

  With this configuration, the clamp member can be reliably fixed to the flange of the first split casing and the flange of the second split casing. Even if the number of bolts for fixing the flanges is smaller than the number of casing bolts for directly fixing the flanges in a conventional fluid machine, the sealing function is not impaired thereby.

  In the above-described fluid machine, the clamp member may have a U-shaped cross section, and the elastic member is inserted into the U-shaped inside of the clamp member to form the first split casing. It may have a U-shape sandwiching the flange and the flange of the second divided casing.

  With this configuration, the flange of the first split casing and the flange of the second split casing can be reliably covered, and liquid leakage can be more reliably prevented.

  In the above fluid machine, the clamp member may have a U-shaped cross section, and the elastic member is inserted into the U-shaped inside of the clamp member, and the clamp member You may have the strip | belt-shaped shape pressed on the side surface of the flange of a 1st division | segmentation casing and the flange of the said 2nd division | segmentation casing.

  Also with this configuration, the flange of the first split casing and the flange of the second split casing can be reliably covered, and liquid leakage can be more reliably prevented.

  In the fluid machine, the elastic member may be fixed to a flange of the first divided casing and a flange of the second divided casing with a bolt.

  With this configuration, the elastic member can be reliably fixed to the flange of the first split casing and the flange of the second split casing. The bolt for fixing the elastic member and the bolt for fixing the clamp member may be common.

  The fluid machine may be a high-pressure pump including a rotating shaft and an impeller fixed to the rotating shaft and rotated by the rotation of the rotating shaft. The fluid machine may be the first divided casing and the second divided casing. The casing may be divided with the rotating shaft as a boundary.

  With this configuration, when the casing of the pump is divided, the sealing function between the divided casings can be ensured without increasing the size and weight of the casing even if the liquid in the casing becomes high pressure.

  In the above fluid machine, the clamp member and the elastic member may be divided with the rotation axis as a boundary.

  With this configuration, the divided casing can be sealed on both the suction side and the discharge side of the pump.

  According to the present invention, a gasket is not required, and the groove processing for the gasket for the first divided casing and the second divided casing is not required, and the casing shape is simplified. Further, if the clamp member is removed, the elastic member can be removed, and the replacement is easy even when the elastic member has deteriorated over time. Moreover, since an elastic member exists between the clamp member and the flange, it is possible to avoid contact of different materials between the clamp member and the flange.

1 is an exploded perspective view of a horizontal-axis double suction centrifugal pump according to an embodiment of the present invention. The left view of the horizontal-axis double suction centrifugal pump of embodiment of this invention The front view of the horizontal-axis double suction vortex pump of embodiment of this invention AA cross section of horizontal suction pump of the horizontal axis of the embodiment of the present invention BB sectional drawing of a horizontal-axis double suction centrifugal pump of an embodiment of the invention The top view of the clamp member of the horizontal-axis double suction vortex pump of embodiment of this invention The exploded perspective view of the horizontal-axis double suction vortex pump of the modification of embodiment of this invention Perspective view of a conventional horizontal suction pump Left side view of a conventional horizontal suction pump Front view of a conventional horizontal suction pump CC cross section of a conventional horizontal suction pump DD cross section of a conventional horizontal suction pump

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment described below shows an example when the present invention is implemented, and the present invention is not limited to the specific configuration described below. In carrying out the present invention, a specific configuration according to the embodiment may be adopted as appropriate. In the following embodiments, a horizontal-bore double suction centrifugal pump will be described as a fluid machine. However, the present invention is not limited to a liquid pump as long as it is a fluid machine configured by dividing a casing.

  1 is an exploded perspective view of a horizontal-axis double suction centrifugal pump (hereinafter simply referred to as “pump”) according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, and FIG. 1 is a front view of FIG. 1, FIG. 4 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a plan view of the discharge side clamp member and the suction side clamp member.

  The pump 1 is a high-pressure pump that takes in fluid and discharges it at high pressure. As shown in FIGS. 1 to 5, the pump 1 is configured by accommodating an impeller 4 fixed to a rotary shaft 3 in a pump casing 2. The suction casing 202 is wound in a spiral shape after the fluid flowing in from one suction port 23 is separated into two by the volute casing 201 inside the suction casing 202, and the inlets 24 provided on both sides of the volute casing 201, 24 (see FIG. 4) flows into the volute casing 201, and the fluid pressurized by the rotation of the impeller 4 is discharged from the discharge port 25.

  The pump casing 2 is composed of a plurality of divided casings. Specifically, the pump casing 2 includes a lower casing 21 below the rotating shaft 3 and an upper casing 22 above the rotating shaft 3. That is, the pump casing 2 is divided horizontally with the rotary shaft 3 as a boundary, and is divided into upper and lower divided casings (a lower casing 21 and an upper casing 22). The lower casing 21 and the upper casing 22 correspond to the divided casing of the present invention.

  The lower casing 21 and the upper casing 22 have flanges on their mating surfaces. Specifically, the lower casing 21 has a lower suction side flange 211F formed on the suction side with respect to the rotation shaft 3 and a lower discharge side flange 212F formed on the discharge side with respect to the rotation shaft 3. The upper casing 22 has an upper suction side flange 221F formed on the suction side with respect to the rotation shaft 3 and an upper discharge side flange 222F formed on the discharge side with respect to the rotation shaft 3. The lower suction side flange 211F and the upper suction side flange 221F are combined, and the lower discharge side flange 212F and the upper discharge side flange 222F are combined.

  The lower suction side flange 211F and the lower discharge side flange 212F are respectively formed along the outer periphery of the upper end of the lower casing 21, and the upper suction side flange 221F and the upper discharge side flange 222F are respectively along the outer periphery of the lower end of the upper casing 22. Is formed. The lower suction side flange 211F and the upper suction side flange 221F are formed to protrude from the upper end of the lower casing 21 and the lower end of the upper casing 22 toward the suction side, respectively. The lower discharge side flange 212F and the upper discharge side flange 222F is formed to protrude from the upper end of the lower casing 21 and the lower end of the upper casing 22 toward the discharge side. The lower casing 21 and the upper casing 22 are in close contact with each other on the flange surface.

  Bolt holes 211FH are formed at both ends of the lower suction side flange 211F, bolt holes 212FH are formed at both ends of the lower discharge side flange 212F, and both ends of the upper suction side flange 221F correspond to the bolt holes 211FH. Bolt holes 221FH are formed, and bolt holes 222FH corresponding to the bolt holes 212FH are formed at both ends of the flange 222F on the upper discharge side.

  The pump 1 has a clamp member that sandwiches the flange of the lower casing 21 and the flange of the upper casing 22 in a state where the lower casing 21 and the upper casing 22 are combined with each other. Specifically, the suction side clamp member 51 sandwiches the lower suction side flange 211F and the upper suction side flange 221F that are aligned with each other, and the discharge side clamp member 52 includes the lower discharge side flange 212F and the upper discharge that are aligned with each other. The side flange 222F is sandwiched.

  The suction side clamp member 51 has a U-shaped cross section so that the lower suction side flange 211F is supported from the lower side, the upper suction side flange 221F is pressed from the upper side, and is fitted from the suction side. Yes. The discharge-side clamp member 52 has a U-shaped cross section so that the lower discharge-side flange 212F is supported from the lower side, the upper discharge-side flange 222F is pressed from the upper side, and is fitted from the discharge side. Yes.

  Bolt holes 51H corresponding to bolt holes 211FH and 221FH are formed at both ends of the suction side clamp member 51, and the discharge side clamp member 52 also corresponds to bolt holes 212FH and 222FH at both ends thereof. A bolt hole 52H is formed.

  A suction side elastic member 61 is inserted into the U-shaped recess of the suction side clamp member 51. The suction-side elastic member 61 has a U-shape sandwiching the lower suction-side flange 211F and the upper suction-side flange 221F that face each other. That is, the suction side elastic member 61 is provided between the suction side clamp member 51, the lower suction side flange 211F, and the upper suction side flange 221F.

  The height of the inner wall of the U-shaped concave portion of the suction side elastic member 61 is equal to the sum of the thickness of the lower suction side flange 211F and the thickness of the upper suction side flange 221F. The height of the outer wall of the U-shaped recess of the suction side elastic member 61 is equal to the height of the inner wall of the U-shaped recess of the suction side clamp member 51. The length of the suction side elastic member 61 is equal to the circumferential length of the lower suction side flange 211F and the upper suction side flange 221F, and covers all the boundaries between the lower suction side flange 211F and the upper suction side flange 221F.

  A discharge-side elastic member 62 is inserted into the U-shaped recess of the discharge-side clamp member 52. The discharge-side elastic member 62 has a U-shape sandwiching the lower discharge-side flange 212F and the upper discharge-side flange 222F that face each other. That is, the discharge side elastic member 62 is provided between the discharge side clamp member 52, the lower discharge side flange 212F, and the upper suction side flange 222F.

  The height of the inner wall of the U-shaped concave portion of the discharge side elastic member 62 is equal to the total thickness of the lower discharge side flange 212F and the upper discharge side flange 222F. The height of the outer wall of the U-shaped recess of the discharge side elastic member 62 is equal to the height of the inner wall of the U-shaped recess of the suction side clamp member 51. The length of the discharge-side elastic member 62 is equal to the circumferential length of the lower discharge-side flange 212F and the upper discharge-side flange 222F, and covers all the boundaries between the lower discharge-side flange 212F and the upper discharge-side flange 222F.

  Bolt holes 61H corresponding to bolt holes 211FH and 221FH are formed at both ends of the suction side elastic member 61, and the discharge side elastic member 62 also corresponds to bolt holes 212FH and 222FH at both ends thereof. A bolt hole 62H is formed.

  When the suction-side elastic member 61 is fitted to the lower suction-side flange 211F and the upper suction-side flange 221F that are aligned with each other, the bolt hole 61H, the bolt hole 211FH, and the bolt hole 221FH are aligned. When the suction-side clamp member 51 is fitted on the suction-side elastic member 61 fitted to the lower suction-side flange 211F and the upper suction-side flange 221F that are aligned with each other, the bolt hole 51H, the bolt hole 61H, and the bolt hole 211FH and bolt hole 221FH coincide. The clamp member fixing bolt 511 is screwed into the bolt hole 51H, the bolt hole 61H, the bolt hole 211FH, and the bolt hole 221FH, and the suction side clamp member 51 and the suction side elastic member 61 are fixed to the pump casing 2.

  The suction side elastic member 61 is inserted into the U-shaped recess of the suction side clamp member 51. When the suction side clamp member 51 is fixed to the casing 2 by the bolt 511, the suction side clamp member 51 presses the suction side elastic member 61 against the side surfaces of the lower suction side flange 211F and the upper suction side flange 221F, and the suction side elastic member 61 Is pressed against the side surfaces of the lower suction side flange 211F and the upper suction side flange 221F. As a result, the suction side is sealed.

  Further, when the discharge-side elastic member 62 is fitted to the lower discharge-side flange 212F and the upper discharge-side flange 222F that are aligned with each other, the bolt hole 62H, the bolt hole 212FH, and the bolt hole 222FH coincide. When the discharge-side clamp member 52 is fitted on the discharge-side elastic member 62 fitted to the lower discharge-side flange 212F and the upper discharge-side flange 222F, the bolt hole 52H, the bolt hole 62H, and the bolt hole 212FH and bolt hole 222FH coincide. The clamp member fixing bolt 521 is screwed into the bolt hole 52H, the bolt hole 62H, the bolt hole 212FH, and the bolt hole 222FH, and the discharge side clamp member 52 and the discharge side elastic member 62 are fixed to the pump casing 2.

  The discharge-side elastic member 62 is inserted into the U-shaped recess of the discharge-side clamp member 52. When the discharge-side clamp member 52 is fixed to the casing 2 by the bolt 521, the discharge-side clamp member 52 presses the discharge-side elastic member 62 against the side surfaces of the lower discharge-side flange 212F and the upper discharge-side flange 222F. 62 is pressed against the side surfaces of the lower discharge side flange 212F and the upper discharge side flange 222F. As a result, the discharge side is sealed.

  The suction side clamp member 51 and the discharge side clamp member 52 are made of fiber reinforced plastic (FRP: Fiber Reinforced Plastics). The suction-side clamp member 51 and the discharge-side clamp member 52 may be bonded to the suction-side elastic member 61 and the discharge-side elastic member 62 at locations where they come into contact with the suction-side elastic member 61 and the discharge-side elastic member 62, respectively. It may be simply abutting.

  The suction side elastic member 61 and the discharge side elastic member 62 are made of rubber, for example. The rubber used for the suction side elastic member 61 and the discharge side elastic member 62 may be, for example, any one of nitrile rubber, fluorine rubber, ethylene propylene rubber, silicon rubber, acrylic rubber, and hydrogenated nitrile rubber. The suction-side elastic member 61 and the discharge-side elastic member 62 may be bonded to the lower casing 21 and the upper casing 22 or are simply in contact with each other at a position in contact with the lower casing 21 and the upper casing 22 (flange thereof). Just be fine.

  As described above, in the pump 1 of the present embodiment, the mating surface of the lower casing 21 and the upper casing 22 is used as a flange, and the flange of the lower casing 21 and the flange of the upper casing 22 are connected to the suction side elastic member 61 and the suction. The lower casing 21 and the upper casing 22 can be fixed and sealed so as to be sandwiched between the side clamp member 51, the discharge side elastic member 62, and the discharge side clamp member 52, respectively.

  Compared with the conventional pump 100 of FIGS. 8 to 11, in the pump 1 of the present embodiment, the mating surfaces of the lower casing 21 and the upper casing 22, that is, the mating of the lower suction side flange 211F and the upper suction side flange 221F. Since the surfaces and the mating surfaces of the lower discharge side flange 212F and the upper discharge side flange 222F are respectively covered with the suction side elastic member 61 and the discharge side elastic member 62, the suction side elastic member 61 and the discharge side elastic member 62 Liquid leakage from the mating surfaces can be prevented, so that a gasket like the conventional pump 100 is not required, and the lower suction side flange 211F, the upper suction side flange 221F, the lower discharge side flange 212F, and the upper discharge side flange It is not necessary to perform groove processing for the gasket in 222F.

  Moreover, in the pump 1 of this Embodiment, it is not necessary to provide the casing bolt for fastening flanges. That is, in the conventional pump 100, as shown in FIG. 8, the flanges are in close contact with each other with a plurality of casing bolts. However, in the pump 1 of the present embodiment, the clamp members are fixed to both ends of each flange. Only a clamp member fixing bolt is provided. This is because the suction side clamp member 51 and the discharge side clamp member 52 are responsible for sealing the lower casing 21 and the upper casing 22 so as to withstand the internal pressure in the pump casing 2, so that a plurality of conventional casing bolts are provided. This is because there is no need to provide a clamp member fixing bolt 511 for fixing the suction side clamp member 51 to the pump casing 2 so that the suction side clamp member 51 does not simply come off to the suction side. Similarly, a conventional casing bolt is unnecessary on the discharge side, and a clamp member that fixes the discharge side clamp member 52 to the pump casing 2 at both ends of the flange so that the discharge side clamp member 52 does not come off to the discharge side. Only the fixing bolt 521 is provided.

  As described above, when the number of bolts is reduced, it is possible to simplify the mounting work for mounting the lower casing 21 and the upper casing 22 to form the pump casing 2.

  Further, in the pump 1 of the present embodiment, the suction side clamp member 51 and the discharge side clamp that sandwich the respective flanges serve to seal the lower casing 21 and the upper casing 22 so as to withstand the internal pressure in the pump casing 2. Since the member 52 bears, it is not necessary to make the flange itself large and thick as compared with the conventional pump 100, and the flanges of the lower casing 21 and the upper casing 22 can be made smaller and thinner. Therefore, according to the pump 1 of this Embodiment, the pump casing 2 can be reduced in weight compared with the past.

  Moreover, since the pump casing 2 can be reduced in size in this way, the material (for example, cast iron, cast steel, steel) of the pump casing 2 can be saved, and the cost can be reduced. In particular, when duplex stainless steel is used as the material of the pump casing 2, duplex stainless steel is expensive. Therefore, the material cost can be greatly reduced by downsizing and thinning the flange.

  In the above embodiment, the suction-side clamp member 51 and the discharge-side clamp member 52 are each formed in a U-shaped cross section, and the suction-side elastic member 61 and the discharge-side elastic member 62 are also in the suction-side clamp member 51. The discharge side clamp member 52 has the same shape as the U-shaped cross section, but the suction side elastic member and the discharge side elastic member are not limited to this shape.

  FIG. 7 is a view showing a modification of the suction side elastic member and the discharge side elastic member. In this modification, the suction side elastic member 61 'is a band-like member, and the width thereof is equal to (or more than) the sum of the thickness of the lower suction side flange 211F and the thickness of the upper suction side flange 221F. It may be slightly smaller). The thickness of the lower suction side flange 211F and the thickness of the upper suction side flange 221F is equal to the height of the inner wall of the U-shaped recess of the suction side clamp member 51. Therefore, the suction side elastic member 61 ' Is equal to (or may be slightly smaller than) the height of the inner wall. The length of the suction side elastic member 61 'is equal to the circumferential length of the lower suction side flange 211F and the upper suction side flange 221F, and covers all the boundaries between the lower suction side flange 211F and the upper suction side flange 221F. .

  Similarly, the discharge-side elastic member 62 ′ is a band-like member, and the width thereof is equal to (or slightly smaller than) the total thickness of the lower discharge-side flange 212F and the upper discharge-side flange 222F. Also good). The total thickness of the lower discharge side flange 212F and the upper discharge side flange 222F is equal to the height of the inner wall of the U-shaped recess of the discharge side clamp member 52, and accordingly, the discharge side elastic member 62 '. Is equal to (or may be slightly smaller than) the height of the inner wall. The length of the discharge-side elastic member 62 'is equal to the circumferential length of the lower discharge-side flange 212F and the upper discharge-side flange 222F, and covers all the boundaries between the lower discharge-side flange 212F and the upper discharge-side flange 222F. .

  The suction-side elastic member 61 ′ is inserted into the U-shaped recess of the suction-side clamp member 51. When the suction side clamp member 51 is fixed to the casing 2 by the bolt 511, the suction side clamp member 51 presses the suction side elastic member 61 'against the side surfaces of the lower suction side flange 211F and the upper suction side flange 221F, and the suction side elastic member 61 'is pressed by the side surface of the lower suction side flange 211F and the upper suction side flange 221F. As a result, the suction side is sealed.

  The discharge-side elastic member 62 ′ is inserted into the U-shaped recess of the discharge-side clamp member 52. When the discharge-side clamp member 52 is fixed to the casing 2 by the bolts 521, the discharge-side clamp member 52 presses the discharge-side elastic member 62 ′ against the side surfaces of the lower discharge-side flange 212F and the upper discharge-side flange 222F, and the discharge-side elastic member 62 ′ is pressed against the side surfaces of the lower discharge side flange 212F and the upper discharge side flange 222F. As a result, the discharge side is sealed.

  In the above-described embodiment and its modifications, FRP is used for the suction-side clamp member 51 and the discharge-side clamp member 52, but the material of the suction-side clamp member 51 and the discharge-side clamp member 52 is not limited to this. . In addition, as a material of the suction side clamp member 51 and the discharge side clamp member 52, the thing with strong tensile strength and a lightweight is desirable.

  Moreover, in said embodiment and its modification, although the suction side clamp member 51 and the discharge side clamp member 52 were each formed so that the whole flange might be inserted | pinched, you may clamp only a part of flange. . Further, a plurality of such clamping members may be provided on the suction side and the discharge side. That is, the clamp member may be divided in the axial direction.

  In the above-described embodiment and its modification, two bolt holes and clamp member fixing bolts are provided on the suction side and the discharge side, respectively. However, the bolt holes and clamp member fixing bolts are provided on the suction side and the discharge side, respectively. One at a time. Furthermore, the suction side clamp member 51, the discharge side clamp member 52, the suction side elastic member 61, and the discharge side elastic member 62 may be fixed to the pump casing (flange thereof) by a method other than bolts.

  The present invention eliminates the need for a gasket, eliminates the need for groove processing for the gaskets for the first divided casing and the second divided casing, and simplifies the casing shape. Further, if the clamp member is removed, the elastic member can be removed, and even when the elastic member has deteriorated over time, the replacement is easy, and the first divided casing and the second divided casing are mutually connected. Together, it is useful as a fluid machine or the like in which a casing is formed.

1 Horizontal double suction pump (fluid machine)
2 Pump casing 21 Lower casing (split casing)
211F Lower suction side flange 212F Lower discharge side flange 211FH, 212FH Bolt hole 22 Upper casing (split casing)
221F Upper suction side flange 222F Upper discharge side flange 221FH, 222FH Bolt hole 23 Suction port 24 Inlet 25 Discharge port 3 Rotating shaft 4 Impeller 51 Suction side clamp member 51H Bolt hole 511 Clamp member fixing bolt 52 Discharge side clamp member 52H Bolt Hole 521 Clamp member fixing bolt 61, 61 'Suction side elastic member 61H Bolt hole 62, 62' Discharge side elastic member 62H Bolt hole

Claims (7)

A fluid machine comprising a first divided casing and a second divided casing, wherein the first divided casing and the second divided casing are combined to form a casing;
A clamp member that sandwiches the flange of the first split casing and the flange of the second split casing in a state where the first split casing and the second split casing are aligned with each other;
An elastic member provided between the clamp member and the flange;
A fluid machine comprising:   2. The fluid machine according to claim 1, wherein the clamp member is fixed to a flange of the first divided casing and a flange of the second divided casing with a bolt. The clamp member has a U-shaped cross section,
The elastic member has a U-shape that is inserted into the U-shape of the clamp member and sandwiches the flange of the first split casing and the flange of the second split casing. The fluid machine according to claim 1 or 2. The clamp member has a U-shaped cross section,
The elastic member is inserted into the U-shaped inside of the clamp member, and is pressed by the clamp member against the side surfaces of the flange of the first split casing and the flange of the second split casing. The fluid machine according to claim 1, wherein the fluid machine has a shape.   5. The fluid according to claim 1, wherein the elastic member is fixed to a flange of the first divided casing and a flange of the second divided casing with a bolt. machine.   The fluid machine is a pump including a rotating shaft and an impeller fixed to the rotating shaft and rotated by rotation of the rotating shaft, and the first divided casing and the second divided casing are The fluid machine according to any one of claims 1 to 5, wherein the fluid machine is divided with a rotation axis as a boundary.   The fluid machine according to claim 6, wherein the clamp member and the elastic member are divided with the rotating shaft as a boundary.

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