JPH06235387A - Oil feeding device for compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an oil supply device for a compressor capable of preventing abnormal wear and seizure of a pump portion and a bearing portion due to a foreign substance generated in the compressor and mixed in lubricating oil. [Structure] Pipe part 43 for guiding lubricating oil to the oil pump part 32
Since the filter 36 is provided in the compressor, foreign matters that are generated in the compressor and mixed in the lubricating oil in the oil sump 86 are not captured by the filter 36 and guided to the oil pump portion 32, the frame 5 or the subframe 6. Therefore, for example, it is possible to prevent abnormal wear and seizure of the thrust bearing 51 of the frame 6. And
When the oil pump portion 32 is a positive displacement pump having, for example, a trochoidal tooth profile, damage to the tooth profile due to foreign matter can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device for a compressor used in, for example, an air conditioner, a refrigerator or the like.

[0002]

2. Description of the Related Art FIG. 12 is a side sectional view showing a conventional scroll compressor disclosed in Japanese Patent Application Laid-Open No. 4-54294. In the figure, 1 is a fixed scroll having a spiral wrap 1a, 2 is an orbiting scroll having a spiral wrap 2a which is combined with the spiral wrap 1a, 3 is connected to the orbiting scroll 2 and causes the orbiting scroll 2 to make an orbiting motion. Main shafts 4, 4 are Oldham couplings that fix the orbiting scroll 2 to the main shaft 31, and 5 is a frame (an example of an upper frame) that is shrink-fitted and fixed to the shell 8 at the shrink-fitting contact portion 10. Reference numeral 6 denotes a sub frame (an example of a lower frame) which is provided on the lower side of the frame 5 and rotatably supports the lower end of the main shaft 3. Reference numeral 7 denotes a motor that is provided between the frame 5 and the sub-frame 6 and is composed of a general rotor, a stator, etc., and drives the main shaft 3 to rotate (an example of a motor portion), and 11 denotes a shaft portion of the fixed scroll 1. Discharge port for discharging refrigerant gas,
Reference numeral 31 denotes an oil supply passage formed in the main shaft 3 along the axial center portion, 32 denotes an oil pump portion for pumping up lubricating oil and sending it to the oil supply passage 31, 51 denotes a thrust bearing for supporting the thrust force of the orbiting scroll 2, 81 is a sealed terminal provided on the shell 8,
Reference numeral 82 denotes a suction pipe for the refrigerant gas, which opens into the motor-side space 84 in the shell 8. 83 is a discharge pipe and a shell 8
It is opened in the fixed scroll side space 85 that communicates with the discharge port 11 therein. 86 is an oil sump at the bottom of the shell 8. In addition, 5a is a relief hole for buffering the deformation of the frame 5 at the time of shrink fitting, 5b is a reamer hole, and 101a is a reamer hole.

Next, the operation of the conventional compressor will be described. When the sealed terminal 81 is energized, the motor 7 is driven, and the spindle 3 rotates in synchronization with this. The fluid gas is compressed by the cooperative action of the orbiting scroll 2 and the fixed scroll 1 which are caused to oscillate accordingly. At this time, the fluid gas is sucked into the motor side space 84 from the outside of the shell 8 through the suction pipe 82, and then the scrolls 1, 2
Is compressed into a compression chamber (an example of a compression unit). Further, the fluid gas is discharged from the discharge port 11 to the outside of the shell 8 via the discharge pipe 83. When the main shaft 3 rotates, the oil pump portion 3 such as a centrifugal pump or a positive displacement pump
2 works together. As a result, the lubricating oil in the oil sump 86 is supplied to the thrust bearing 51, etc. through the oil supply passage provided in the main shaft 3, and then passes through the gap in the shell 8 by its own weight to again collect the oil in the bottom part. Return to 86.

Since the conventional compressor oil supply device is constructed as described above, when foreign matter such as fine sand, iron powder, copper powder, etc. is brought into the compressor from the outside through the suction pipe 82, These foreign substances accompany the lubricating oil, and the oil supply passage 31
There is a case in which it may flow into the thrust bearing 51 or the like through the above and cause troubles such as abnormal wear or seizure of these bearing portions. On the other hand, when a positive displacement pump having, for example, a trochoidal toothed rotor is used as the oil pump portion, there is a problem that foreign matter often enters the back teeth and damages the teeth and the like.

Therefore, as shown in FIG. 13, the suction pipe 8
It is conceivable to provide a pipe expanding portion 87 on the second pipe 2 and to provide a filter 88 inside the pipe expanding portion 87 for preventing foreign matter from entering the compressor. Such a structure is adopted in the suction pipe 82,
It has been conventionally adopted as a relatively simple means for effectively protecting the compressor from foreign substances brought into the compressor by a so-called refrigeration cycle to which the discharge pipe 83 is connected.

[0006]

However, even if the suction pipe 82 is provided with the filter 88 as described above, foreign matter (for example, burrs, burrs, and cutting during machining of individual parts of the component) is required when the compressor is assembled. It is extremely difficult to avoid the generation of cutting chips at the time, spatter at the time of welding the shell, abrasion powder caused by sliding of the bearings generated during operation of the compressor, etc.) inside the compressor. These foreign matters are mixed with the lubricating oil in the oil sump 86 and circulate along with the inside of the compressor. Therefore, even if foreign matter is generated inside the compressor,
Acceleration of wear of each bearing portion may cause seizure due to excessive wear. Further, as described above, it also causes damage to the teeth of the positive displacement pump.

On the other hand, downsizing of air conditioners has become a trend in recent years. Along with this, the compressor itself must inevitably be downsized. Therefore, as described above, even if measures are taken to eliminate the inconvenience caused by foreign matter generated inside the compressor, it is necessary to prevent the compressor from increasing in size. In addition, it is necessary to prevent the lubricating oil from becoming difficult to flow in the compressor by taking the above measures.

On the other hand, when a positive displacement pump is used in the conventional compressor oil supply device, the positive displacement pump requires many parts as compared with the centrifugal pump. Moreover, it is necessary to assemble each component at a preset predetermined position of the subframe with high positioning accuracy. As described above, in order to assemble the positive displacement pump to the subframe with high positioning accuracy when assembling the compressor, it was necessary to manually turn the compressor upside down and set the positive displacement pump in the upward position. . Therefore, it is necessary to manually turn the compressor upside down, and a work space for the upside down operation is also required. As a result, it has been difficult to save space in the compressor manufacturing line and to automate the assembly of parts.

The present invention has been made in order to solve the above-mentioned problems. First, foreign matter mixed with lubricating oil inside the compressor is brought into the oil pump portion or the bearing portion of each frame. It is to prevent that. Further, even when adopting a structure in which the foreign matter is not brought into the pump portion or the bearing portion, it is possible to prevent a decrease in pump efficiency without increasing the size of the compressor. Further, the assembling process of assembling the positive displacement pump with the compressor with a predetermined positioning accuracy can be automated, and the space required for the assembling process can be saved.

[0010]

SUMMARY OF THE INVENTION In a compressor oil supply device of the present invention, a compressor is provided in a shell and forms a compression chamber by combining a fixed scroll and an orbiting scroll. A motor unit that drives a dynamic scroll, a main shaft that is connected to the orbiting scroll and rotates in synchronization with the motor unit, an upper frame and a lower frame that pivotally support the main shaft, the lower frame, and the An oil pump part for pumping the lubricating oil stored between the bottom part of the shell, a pipe part connected and fixed to the main shaft for guiding the lubricating oil to the oil pump part, and a filter provided on the pipe part Is. As the oil pump unit, for example, a centrifugal pump or a positive displacement pump can be used.

Further, a compression part provided in the shell to form a compression chamber by combining a fixed scroll and an orbiting scroll, a motor part housed in the shell for driving the orbiting scroll, and the orbiting scroll. Oil for pumping up lubricating oil stored between a main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that pivotally support the main shaft, and the lower frame and the bottom of the shell. A pump portion, a pipe portion that is fixedly connected to the main shaft, guides lubricating oil to the oil pump portion, and is formed in a tapered shape so that a large diameter portion is formed on the lower frame side and a small diameter portion is formed on the lubricating oil side; And a filter having a substantially conical shape, which is provided on the pipe portion and is thin on the small diameter side of the pipe portion and thick on the large diameter portion side of the pipe portion.

Further, a compression portion provided in the shell to form a compression chamber by combining a fixed scroll and an orbiting scroll, a motor portion housed in the shell for driving the orbiting scroll, and the orbiting scroll are provided. A main shaft that is connected and rotates in synchronization with the motor section; an upper frame and a lower frame that rotatably support the main shaft;
An oil pump part for pumping the lubricating oil stored between the lower frame and the bottom part of the shell, a pipe part connected and fixed to the main shaft for guiding the lubricating oil to the oil pump part, and a filter provided on the pipe part In a compressor oil supply device including: a positive displacement pump that constitutes the oil pump unit; a pump cover for holding the positive displacement pump on the lower surface of the lower frame; and a predetermined position on the upper surface of the pump cover. And a supporting portion for positioning and supporting the positive displacement pump, the positive displacement pump being positioned and supported by the supporting portion to integrally configure the pump cover and the positive displacement pump, and the integral pump cover. And a positive displacement pump fixed to the lower surface of the lower frame.

[0013]

According to the compressor oil supply apparatus of the present invention, since the filter is provided in the pipe section for guiding the lubricating oil to the oil pump section, foreign matters generated in the compressor and mixed in the lubricating oil are captured by the filter, It is not guided to the upper frame or the lower frame as well as the pump part. Therefore, it is possible to prevent abnormal wear or seizure of, for example, the bearing portion of the upper frame or the lower frame. When the oil pump section is a positive displacement pump having a rotor such as a trochoidal tooth profile, damage to the tooth profile due to the foreign matter can be prevented.

Further, even in the case of adopting a structure provided with a filter for trapping foreign matters in the compressor, the filter is provided in the pipe portion in accordance with the shape of the pipe portion, so the filter is provided in the pipe portion. Therefore, a new space for the compressor is not required, and therefore the compressor does not become large.
Then, since the foreign matter in the lubricating oil is trapped between the inner surface of the relatively wide pipe portion on the downstream side in the pumping direction and the outer surface of the large diameter portion of the filter, the clogging area of the filter due to the trapped foreign matter is small, In addition, the lubricating oil smoothly passes through the filter along the axis of the pipe.

Further, when a positive displacement pump is used as the oil pump section, the positive displacement pump is integrally positioned and supported in advance by a pump cover for holding the positive displacement pump on the lower surface of the lower frame. . Therefore, the integral positive displacement pump and the pump cover can be easily fixed to the lower surface of the lower frame. As a result, the positive displacement pump can be easily assembled to the compressor in the completed posture.

[0016]

【Example】

First Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 is a vertical sectional view of a scroll compressor according to Embodiment 1 of the present invention, FIG. 2 is an enlarged vertical sectional view of an oil pump portion according to Embodiment 1 of the present invention, and FIG. 3 is an oil pump portion according to Embodiment 1 of the present invention. 4 is a state explanatory view showing a flow state of the lubricating oil and the foreign matter in FIG. 4, and FIG. 4 is a state explanatory view showing another flow state of the lubricating oil and the foreign matter in the oil pump portion according to the first embodiment of the present invention.
In each drawing, the same or corresponding parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. In FIG. 1, reference numeral 32 is an oil pump unit such as a centrifugal pump or a positive displacement pump. Lubricating oil in the oil sump 86 pumped up from the pump portion 32 passes through the oil supply passage 31 in the main shaft 3 to pass through the thrust bearing 5
After being pumped up to the first grade, it returns to the oil sump 86 by its own weight as in the conventional example.

Since the types of the oil pump section 32 include, for example, a centrifugal pump and a positive displacement pump, an embodiment using each of them will be described below. First, the case of using a centrifugal pump will be described with reference to FIG. In the figure,
A step 33 is formed at the end of the main shaft 3 on the oil sump 86 side. The centrifugal pump portion 34 has an opening end 35 on the oil sump 86 side for summing up the oil sump 8 in order to pump up the lubricating oil in the oil sump 86.
It is formed so as to taper toward the 6 side. That is, the centrifugal pump part 34 has a large-diameter part on the lower frame 6 side,
It is formed in a taper shape so as to have a small diameter portion on the 6 side.
On the other hand, on the other end side of the centrifugal pump portion 34, the inner wall side is connected and fixed to the step 33 by press-fitting shrink fitting, and the outer wall side is slidably contacted with the upper end surface 61 and the inner peripheral surface 62 of the subframe 6 so that the main shaft 3 is supported. It is rotatably supported in the direction indicated by arrow A in the figure. Although the bearing is not shown as a separate component on the upper end surface 61 and the inner peripheral surface 62 that are in sliding contact with the centrifugal pump portion 34 in the figure, if it is necessary to ensure a predetermined reliability, a corresponding bearing is used. Should be provided.

In particular, a filter 36 is fixedly provided on the inner wall of the centrifugal pump portion 34 between the open end 35 and the oil reservoir side end portion of the main shaft 3 by press fitting or the like. The filter 36 prevents foreign matters accompanying the lubricating oil pumped from the opening end 35 from being brought into the oil supply passage 31. Needless to say, even if the filter 36 has a flat plate shape as shown in FIG. 1, the above effect can be obtained.

3 and 4 show the arrangement direction of the filter formed by squeezing the filter into a substantially conical tube shape.
It is a figure for making a comparison about the flow of lubricating oil (white arrow) and the flow of a foreign substance (black arrow), respectively. 3 shows the case where the narrowed portion of the filter is arranged on the downstream side with respect to the flow direction of the lubricating oil, and FIG. 4 shows the opposite case.

According to the configuration shown in FIG. 3, the foreign matter 37 is
Once it is blown to the inner wall of the centrifugal pump portion 34 by the centrifugal action, since the filter 36 is squeezed on the downstream side in the direction of the flow of the lubricating oil, the foreign matter 37 is inside the filter 36 and the foreign matter 37 is squeezed. I try to gather in my heart.
As a result, the base-shaped fine lubricating oil passage of the filter 36 is blocked over a relatively wide range. Further, the flow of the lubricating oil is impeded from going straight due to the foreign matters 37 accumulated in the shaft center portion, so that the pump efficiency may be reduced.

On the other hand, with the structure shown in FIG. 4, the foreign matter 37 blown to the inner wall of the centrifugal pump portion 34 is captured by the outer peripheral portion of the filter 36 having a relatively large space, so that the filter 36 A wide lubricating oil passage can be secured in the shaft center. Therefore, the lubricating oil passing through the filter 36 smoothly flows straight along the axial center portion.
As a result, according to this configuration, there is almost no decrease in pump efficiency due to the foreign matter 37.

Second Embodiment Next, a case where a positive displacement pump is used as a second embodiment of the present invention will be described with reference to FIGS. 5 to 8. FIG. 5 is a vertical cross-sectional view showing an embodiment using a positive displacement pump, and FIG. 6 is a perspective view showing each component constituting the positive displacement pump. In each drawing, the oil reservoir side end surface 38 of the main shaft 3 is formed in a downward projection shape in which a side surface is partially cut out, and the oil pump portion 3
Of the inner rotor 321 and the outer rotor 322 of the trochoidal tooth shape, which form part 2, the inner rotor 321 is detachably fitted and locked with a locking hole 323 formed in the central portion of the inner rotor 321. As a result, the inner rotor 32
1 rotates in synchronization with the main shaft 3. The pump case 39 that houses the oil pump portion 32 is formed so that the outer diameter portion of the outer rotor 322 can be housed in the recessed fitting portion 391 that is formed at a position that is eccentric by a predetermined amount with respect to the axial center of the pump case 39. . Further, an inlet port 402 and an outlet port 401 for taking in and out the lubricating oil are bored in the pump port 40, and the pin 41 is positioned and fixed to the pump case 39 in the rotational direction. Further, at a predetermined position on the lower surface of the sub-frame 6, a pump portion accommodating portion 61 capable of accommodating each component from the pump case 39 to the disc spring 42 is formed so as to be recessed upward.

A lower end surface 4 is formed on the upper surface of a disk-shaped pump cover 44 having a pipe portion 43 accommodating the filter 36.
Pump port 40 with disc spring 42 applied to 03
Is positioned and placed at a predetermined position. Pump cover 44
Are fixed to the lower surface of the sub-frame 6 by, for example, bolts 442 while pushing up the disc spring 42. The urging force of the disc spring 42 generated at this time seals the pump case 39 and the pump port 40 in the axial direction, thereby preventing leakage of lubricating oil in the oil pump portion 32.
Therefore, even in the case of a positive displacement pump, the filter 3
It is needless to say that the provision of 6 can prevent foreign matter in the lubricating oil from being brought into the oil supply path 31, and in particular, prevent the foreign matter from being damaged between the tooth profiles of the inner rotor 321 and the outer rotor 322. can do.

FIG. 7 and FIG. 8 respectively compare the arrangement state (throttle direction) of the filter with respect to the pipe portion integrally provided on the pump cover. In each drawing, the pipe portion 43 is formed so as to be narrowed toward a tapered opening end 431 that opens toward the oil sump 86 side. That is, the pipe portion 43 becomes a large diameter portion on the lower frame 6 side, and the oil sump 8
It is formed in a taper shape so as to have a small diameter portion on the 6 side.
Assuming that the total height of the filter 36 is constant, for example, in the size l, the space of the pipe portion 43 for accommodating the filter 36 is the filter 3 in the configuration shown in FIG.
A storage space longer than or equal to the dimension 1 of 6 is required. The dimension of the pipe portion 43 at this time is L ₁ .

On the other hand, in the case of the configuration shown in FIG. 8, since the filter 36 is housed in such a manner that the shape of the filter 36 follows the shape of the inner surface of the pipe portion 43, the pipe portion 43 is accommodated.
It is possible to make the dimension L ₂ of the element smaller than the dimension L ₁ of the pipe portion 43 shown in FIG. Therefore, in the case of the configuration of FIG. 8, the pump cover 44 can be downsized, and the compressor can be downsized.

Embodiment 3 Next, another embodiment of the positive displacement pump will be described with reference to FIGS. 9 to 11. 9 is a longitudinal sectional view of a compressor according to another embodiment using a positive displacement pump, FIG. 10 is an exploded perspective view showing respective parts constituting the positive displacement pump, and FIG. 11 is a compression showing an assembled state of an assembly. It is a longitudinal sectional view of the machine.
The inner rotor 321 is formed by the end surface 38 of the main shaft 3 on the oil reservoir side
Is driven in the same manner as in the second embodiment described above, but here, the pump case 39 is formed in a cylindrical shape having a recess 391 for accommodating the pump port 40. Further, in the pump port 40, a pump portion housing portion 404 formed at a position eccentric to the shaft center for housing the oil pump portion 32, an inlet port 402, and an outlet port 4 are provided.
01 and are formed respectively. Note that the disc spring 42 is applied to the lower end surface 403 of the pump port 40 and urges it upward, as in the second embodiment. Further, on the upper surface of the pump cover 44, there is provided a concave portion 441 (an example of a supporting portion) which is fitted to the lower portion of the pump port 40 to prevent the pump port 40 from being displaced in the radial direction and to be positioned at a predetermined position. Has been formed.

Subsequently, a method of assembling the compressor using the positive displacement pump according to the third embodiment will be described below. First, the disc spring 42 is housed in the recess 441 of the pump cover 44. Then, the lower portion of the pump port 40 is recessed 44
1 and is placed on the disc spring 42. Then, the oil pump portion 32 is stored in the pump portion storage portion 404 on the upper surface of the pump port 40. Then, the pump case 39
The upper portion of the pump port 40 is fitted into the concave portion 391 of the.

According to this assembling method, the positive pump assembly 45 (see FIG. 11) is integrated on the pump cover 44 by sequentially assembling the components from the disc spring 42 to the pump case 39. Be assembled into. At the time of assembling the assembly 45, the parts are accurately positioned at their respective predetermined positions, so that they are not displaced in the radial direction. Therefore, as shown in FIG. 11, when assembling the oil pump unit, it is not necessary to turn the compressor upside down as in the conventional case, and the assembly 45 is attached to the subframe 6 with the same posture as when the compressor was completed. It can be relatively easily assembled to the pump housing 61. As a result, it became possible to automate the assembly of the positive displacement pump in the compressor. In addition, no working space is required to turn the compressor upside down.

[0029]

According to the compressor oil supply apparatus of the present invention,
Since the filter is provided in the pipe portion that guides the lubricating oil to the oil pump portion, for example, foreign matter generated in the compressor and mixed in the lubricating oil is captured by the filter and is not brought into the oil pump portion, the upper frame, or the lower frame. Therefore, it is possible to prevent abnormal wear or seizure of, for example, the bearing portion in the upper frame or the lower frame. Further, when the oil pump portion is a positive displacement pump having a trochoidal tooth profile or the like, it is possible to prevent the tooth profile from being damaged.

Further, even if the filter is provided with a filter for trapping foreign matter in the compressor, the filter is provided in the pipe portion along the shape of the pipe portion, so that a new filter for providing the filter is provided in the pipe portion. It does not require space and therefore does not result in a larger compressor. Since the foreign matter in the lubricating oil is captured in the relatively large space between the outer surface of the large diameter portion of the filter and the inner surface of the pipe portion on the downstream side in the pumping direction, the clogging area of the filter due to the captured foreign matter is reduced. The lubricating oil is small and smoothly passes through the filter along the axis of the pipe. As a result, the pump efficiency of the oil pump unit hardly decreases.

Further, when a positive displacement pump is used as the oil pump unit, the positive displacement pump is integrally positioned and supported in advance by a pump cover for holding the positive displacement pump on the lower surface of the lower frame. . Then, since it is only necessary to fix the integral positive displacement pump and the pump cover to the lower surface of the lower frame in the completed posture, the process of assembling the positive displacement pump into the compressor becomes easy. Therefore, it is not necessary to manually turn the compressor upside down when the positive displacement pump is assembled, and the process of assembling the positive displacement pump can be automated. In addition, it is possible to save the work space required for the upside down operation of the compressor.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a scroll compressor according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of an oil pump section according to the first embodiment of the present invention.

FIG. 3 is a state explanatory view showing a flow state of lubricating oil and foreign matter in the oil pump portion according to the first embodiment of the present invention.

FIG. 4 is a state explanatory view showing another flow state of lubricating oil and foreign matter in the oil pump portion according to the first embodiment of the present invention.

FIG. 5 is an enlarged vertical sectional view of an oil pump portion according to Embodiment 2 of the present invention.

FIG. 6 is an exploded perspective view of components of an oil pump section according to a second embodiment of the present invention.

FIG. 7 is a vertical sectional view of a pump cover and a filter according to a second embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view of another pump cover and filter according to the second embodiment of the present invention.

FIG. 9 is an enlarged vertical sectional view of an oil pump portion according to Embodiment 3 of the present invention.

FIG. 10 is an exploded perspective view of components of an oil pump section according to Embodiment 3 of the present invention.

FIG. 11 is a vertical sectional view showing an assembled state of the oil pump assembly according to the third embodiment of the present invention.

FIG. 12 is a vertical sectional view of a conventional scroll compressor.

FIG. 13 is a vertical cross-sectional view of a scroll compressor according to another conventional example.

[Explanation of symbols]

 1 Fixed Scroll 2 Oscillating Scroll 3 Spindle 5 Frame 6 Subframe 7 Motor 8 Shell 32 Oil Pump Section 36 Filter 43 Pipe Section 44 Pump Cover 45 Assembly 441 Recess

Claims (3)

[Claims] 1. A compression unit that is provided in a shell and forms a compression chamber by combining a fixed scroll and an orbiting scroll; a motor unit that is housed in the shell and drives the orbiting scroll; Oil for pumping up lubricating oil stored between a main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that pivotally support the main shaft, and the lower frame and the bottom of the shell. An oil supply device for a compressor comprising a pump part, a pipe part connected and fixed to the main shaft to guide lubricating oil to the oil pump part, and a filter provided in the pipe part. 2. A compression section which is provided in the shell and which forms a compression chamber by combining a fixed scroll and an orbiting scroll, a motor section which is housed in the shell and drives the orbiting scroll, and the orbiting scroll. Oil for pumping up lubricating oil stored between a main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that pivotally support the main shaft, and the lower frame and the bottom of the shell. A pump portion, a pipe portion that is fixedly connected to the main shaft, guides lubricating oil to the oil pump portion, and is formed in a tapered shape so that a large diameter portion is formed on the lower frame side and a small diameter portion is formed on the lubricating oil side; And a substantially conical filter that is formed on the pipe portion such that it is thin on the small diameter portion side of the pipe portion and is thick on the large diameter portion side of the pipe portion. 3. A compression section which is provided in the shell and which forms a compression chamber by combining a fixed scroll and an orbiting scroll; a motor section which is housed in the shell and drives the orbiting scroll; Oil for pumping up lubricating oil stored between a main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that pivotally support the main shaft, and the lower frame and the bottom of the shell. In a compressor oil supply device including a pump portion, a pipe portion that is fixedly connected to the main shaft and guides lubricating oil to the oil pump portion, and a filter provided in the pipe portion, a volume that constitutes the oil pump portion. Type pump,
The positive displacement pump is provided with a pump cover for holding the positive displacement pump on the lower surface of the lower frame, and a support portion provided at a predetermined position on the upper surface of the pump cover for positioning and supporting the positive displacement pump. An oil supply device for a compressor, characterized in that the pump cover and the positive displacement pump are integrally configured by being positioned and supported by a support portion, and the integral pump cover and the positive displacement pump are fixed to the lower surface of the lower frame. .