JP3257847B2 - Compressor refueling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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 drawing, 1 is a fixed scroll having a spiral wrap 1a, 2 is a swinging scroll having a spiral wrap 2a combined with the spiral wrap 1a, 3 is connected to the swinging scroll 2 and makes the swinging scroll 2 swing. The main shaft 4 is an Oldham coupling for fixing the orbiting scroll 2 to the main shaft 3, and the reference numeral 5 is a frame (an example of an upper frame) which is shrink-fitted and fixed to the shell 8 by a shrink-fit contact portion 10. Reference numeral 6 denotes a sub-frame (an example of a lower frame) that is provided below the frame 5 and rotatably supports the lower end of the main shaft 3.
Reference numeral 7 denotes a motor (an example of a motor unit) which is provided between the frame 5 and the sub-frame 6 and is composed of a general rotor, stator or the like, and which drives the main shaft 3 to rotate. Discharge port for discharged refrigerant gas, 31
Is an oil supply passage formed in the main shaft 3 along the shaft center,
Reference numeral 32 denotes an oil pump unit that pumps up lubricating oil and sends it to the oil supply passage 31; 51, a thrust bearing that supports the thrust force of the orbiting scroll 2; 81, a sealed terminal provided on the shell 8;
Is a suction pipe for refrigerant gas, which is open to the motor side space 84 in the shell 8. Reference numeral 83 denotes a discharge pipe which is a fixed scroll side space 85 communicating with the discharge port 11 in the shell 8.
It is open to. 86 is an oil reservoir at the bottom of the shell 8.
In addition, 5a is a relief hole for buffering 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 power is supplied to the sealed terminal 81, the motor 7 is driven, and the main shaft 3 is rotated in synchronization with the drive. The fluid gas is compressed by the cooperative action of the orbiting scroll 2 and the fixed scroll 1 which swing with the movement. 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 two scrolls 1, 2
The air is sucked into a compression chamber (an example of a compression section) and compressed. Further, the fluid gas is discharged from the discharge port 11 to the outside of the shell 8 through the discharge pipe 83. When the main shaft 3 rotates, the oil pump unit 3 such as a centrifugal pump or a positive displacement pump
2 interlocks. As a result, the lubricating oil in the oil sump 86 is supplied to the thrust bearing 51 and the like 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, and again returns to the oil sump at the bottom. Return to 86.

[0004] Since the oil supply device of the conventional compressor is configured as described above, for example, when foreign matter such as minute sand, iron powder, and copper powder is brought into the compressor from outside through the suction pipe 82, These foreign substances accompany the lubricating oil, and the oil supply passage 31
Through the thrust bearing 51 and the like, and may cause troubles such as abnormal wear and seizure of these bearing portions. On the other hand, when a positive displacement pump having, for example, a trochoid tooth-shaped rotor is used as the oil pump section, there is a problem that foreign matter enters the back teeth and frequently causes damage to the teeth and other parts.

Therefore, as shown in FIG.
It is conceivable to provide a pipe expansion section 87 in the pipe expansion section 87 and to provide a filter 88 in the pipe expansion section 87 for preventing foreign matter from entering the compressor. Such a configuration is provided by the suction pipe 82,
It has been conventionally employed 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 filter 88 is provided in the suction pipe 82 as described above, when assembling the compressor, foreign matter (for example, burrs, burrs, cutting, It is extremely difficult to avoid the generation of swarf at the time of welding, spatter at the time of welding of the shell, and abrasion powder generated by sliding of the bearings generated during operation of the compressor inside the compressor. These foreign substances are mixed with the lubricating oil in the oil reservoir 86 and flow along with the inside of the compressor. Therefore, even by foreign matter generated inside the compressor,
It promotes wear of each bearing part and may cause seizure from excessive wear. In addition, as described above, this may cause damage to the teeth of the positive displacement pump.

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

On the other hand, when a positive displacement pump is used in a conventional oil supply device of a compressor, the positive displacement pump requires more parts than a centrifugal pump. In addition, it is necessary to assemble each part at a predetermined position of the sub-frame with high positioning accuracy. In order to assemble the displacement pump to the sub-frame with high positioning accuracy when assembling the compressor in this way, it was necessary to turn the compressor upside down manually beforehand so that the displacement position of the displacement pump was turned upward. . Therefore, the compressor needs to be manually turned upside down, and a work space for the upside down work is also required. As a result, it has been difficult to save space on a compressor assembly manufacturing line and to automate component assembly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. For example, foreign matters mixed with lubricating oil inside a compressor are carried into an oil pump portion and bearing portions of each frame. It is to prevent that. Further, even when a configuration is adopted in which the foreign matter is not carried into the pump section and the bearing section, a reduction in pump efficiency is prevented without increasing the size of the compressor. Furthermore, the assembling process of assembling the positive displacement pump to the compressor with a predetermined positioning accuracy can be automated, and the space required for the assembling process can be reduced.

[0010]

According to the present invention, there is provided an oil supply device for a compressor, which includes a compression section provided in a shell and forming a compression chamber by combining a scroll and the like, and a compressor housed in the shell to drive the scroll and the like. A motor portion, a main shaft connected to the scroll or the like and rotating in synchronization with the motor portion, a frame and a sub-frame rotatably supporting the main shaft, and between the sub-frame and the bottom of the shell. An oil pump that pumps up the stored lubricating oil,
Fixedly connected to the spindle guiding the lubricating oil to the oil pump unit
At the same time, the sub-frame side becomes a large diameter part and the lubricating oil side
A pipe portion having a tapered portion to be a small diameter portion;
The filter is provided with a filter for removing dust which is built in the large diameter portion of the pipe portion . In addition, as an oil pump part,
For example, a centrifugal pump or a positive displacement pump can be used.

Further, the compression section to form a compression chamber by combining <br/> like provided scrolling in the shell, a motor unit which is housed within said shell for driving and the scroll is connected like the scroll a main shaft which rotates in synchronization with the motor unit, and the full <br/> frame and subframe you pivotally supporting said main shaft rotatably, lubricating oil reservoir between the bottom of the said sub-frame shell an oil pump unit for pumping a pipe section which is made form such that the small diameter portion in the large diameter portion in the lubricating oil side leads to the lubricating oil the subframe side to be connected and fixed to the main shaft the oil pump unit, wherein A substantially conical filter provided on the pipe portion and formed to be 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 section provided in the shell to form a compression chamber by combining a fixed scroll and an orbiting scroll, a motor section housed in the shell to drive the orbiting scroll, A main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that rotatably support the main shaft,
An oil pump unit for pumping lubricating oil stored between the lower frame and the bottom of the shell; a pipe unit connected and fixed to the main shaft to guide the lubricating oil to the oil pump unit; and a filter provided on the pipe unit. A displacement pump that constitutes the oil pump section, a pump cover for holding the displacement pump on a lower surface of the lower frame, and a predetermined position on an upper surface of the pump cover. And a support portion for positioning and supporting the positive displacement pump, wherein the positive displacement pump is positioned and supported on the support portion to integrally form the pump cover and the positive displacement pump, and the integral pump cover is provided. And a positive displacement pump is fixed to the lower surface of the lower frame.

[0013]

SUMMARY OF] According to the fuel supply device of a compressor of the present invention, since the internal organs filter pipe portion for guiding the lubricating oil to the oil pump unit, foreign matter mixed in the lubricating oil occurs in a compressor is trapped in the filter, oil pump unit by the original riff frame or the difference
Not led to the subframe. This prevents abnormal wear and seizure, for example, the bearing portion of the frame or sub <br/> frame. When the oil pump section is a positive displacement pump having a rotor having, for example, a trochoidal tooth shape, damage to the tooth shape due to the foreign matter can be prevented.

Further, even in the case of employing a configuration having a filter for catching foreign matter in the compressor, the filter is provided in the pipe according to the shape of the pipe, so that the filter is provided in the pipe. No additional space is required, and the compressor does not become large.
Then, since the foreign matter in the lubricating oil is captured 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 clogged area of the filter due to the captured 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 preliminarily positioned and supported by a pump cover for holding the positive displacement pump on the lower surface of the lower frame, and is integrally formed. . Therefore, the integral positive displacement pump and 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]

Embodiment 1 Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional view of a scroll compressor according to Embodiment 1 of the present invention, FIG. 2 is an enlarged longitudinal sectional view of an oil pump section according to Embodiment 1 of the present invention, and FIG. 3 is an oil pump section according to Embodiment 1 of the present invention. And FIG. 4 is a state explanatory view showing another flow state of the lubricating oil and the foreign matter in the oil pump unit according to the first embodiment of the present invention.
In each of the drawings, the same or corresponding portions as in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 1, reference numeral 32 denotes an oil pump unit such as a centrifugal pump or a positive displacement pump. The lubricating oil in the oil reservoir 86 pumped from the pump section 32 passes through the oil supply passage 31 in the main shaft 3 and passes through the thrust bearing 5.
After being pumped to 1 etc., returning to the oil reservoir 86 by its own weight is the same as in the conventional example.

The type of the oil pump section 32 includes, for example, a centrifugal pump and a positive displacement pump, and an embodiment in which each is used will be described below. First, a case where a centrifugal pump is used 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 reservoir 86 side. The centrifugal pump section 34 has an opening end 35 on the oil reservoir 86 side for pumping lubricating oil in the oil reservoir 86.
It is formed so as to be tapered toward the side 6. That is, the centrifugal pump section 34 is provided with the oil reservoir 8 in the large diameter section on the lower frame 6 side.
It is formed in a tapered shape so as to have a small diameter portion on the 6 side.
On the other hand, the other end side of the centrifugal pump portion 34 has its inner wall side connected and fixed to the step 33 by press-fit shrink-fitting or the like, and its outer wall side is in sliding contact with the upper end surface 61 and the inner peripheral surface 62 of the sub-frame 6 to connect the main shaft 3. It is rotatably supported in the direction indicated by arrow A in the figure. In the drawing, bearings are not shown as separate components on the upper end surface 61 and the inner peripheral surface 62 that are in sliding contact with the centrifugal pump portion 34. However, if necessary for securing predetermined reliability, a corresponding bearing is required. May be provided.

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

FIGS. 3 and 4 show the arrangement direction of the filter formed by narrowing the filter into a substantially conical cylindrical shape.
FIG. 4 is a diagram for comparing the flow of a lubricating oil (open arrow) and the flow of a foreign substance (black arrow). FIG. 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.
Once it is blown off to the inner wall of the centrifugal pump part 34 by centrifugal action, since the filter 36 has a shape narrowed on the downstream side in the lubricating oil flow direction, foreign matter 37 Try to gather in the heart.
As a result, the fine lubricating oil passage having a base shape of the filter 36 is closed over a relatively wide area. In addition, since the flow of the lubricating oil is prevented from traveling straight by the foreign matter 37 accumulated in the shaft center, the pump efficiency may be reduced.

On the other hand, according to the configuration 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. A wide lubricating oil passage can be secured at the shaft center. Therefore, the lubricating oil passing through the filter 36 flows straight and smoothly along the axis.
As a result, according to this configuration, there is almost no reduction 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. FIG. 5 is a longitudinal sectional view showing an embodiment using a positive displacement pump, and FIG. 6 is a perspective view showing components constituting the positive displacement pump. In each of the drawings, the oil reservoir side end surface 38 of the main shaft 3 is formed in a downward projection shape with a side surface partially cut away.
2 of the inner rotor 321 and the outer rotor 322 having, for example, a trochoid tooth shape, are detachably fitted and locked to a locking hole 323 formed in the center of the inner rotor 321. Thereby, 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 a concave fitting portion 391 formed at a position eccentric with respect to the axis of the pump case 39 by a predetermined amount. . The pump port 40 is provided with an inlet port 402 and an outlet port 401 for taking in and out lubricating oil, and is positioned and fixed to the pump case 39 in the rotation direction by a pin 41. At a predetermined position on the lower surface of the sub-frame 6, a pump housing 61 capable of housing each component from the pump case 39 to the disc spring 42 is formed to be recessed upward.

On the upper surface of a disk-shaped pump cover 44 having a pipe portion 43 accommodating a filter 36, a lower end surface 4 is provided.
03 with the disc spring 42 applied to the pump port 40
Is positioned and mounted at a predetermined position. Pump cover 44
Is fixed to the lower surface of the sub-frame 6 by a bolt 442 or the like in a state where the disc spring 42 is pushed up. By the urging force of the disc spring 42 generated at this time, the pump case 39 and the pump port 40 are sealed in the axial direction, and leakage of the lubricating oil in the oil pump section 32 is prevented.
Therefore, even in the case of a positive displacement pump, the filter 3
It is of course possible to prevent foreign substances in the lubricating oil from being brought into the oil supply passage 31 by providing the lubricating oil 6, especially to prevent damage when foreign substances enter between the tooth forms of the inner rotor 321 and the outer rotor 322. can do.

FIGS. 7 and 8 show a comparison of the arrangement of the filter (the direction of restriction) with respect to the pipe portion provided integrally with the pump cover. In each of the drawings, the pipe portion 43 is formed so as to be narrowed toward a tapered opening end 431 that opens to the oil reservoir 86 side. That is, the pipe portion 43 becomes a large-diameter portion on the lower frame 6 side and becomes an oil reservoir 8.
It is formed in a tapered shape so as to have a small diameter portion on the 6 side.
Assuming that the overall height of the filter 36 is constant at, for example, a dimension l, in the case of the configuration illustrated in FIG.
A storage space longer than or equal to the dimension 1 of 6 is required. The dimension of the pipe 43 at this time is L1.

On the other hand, in the case of the configuration shown in FIG. 8, since the filter 36 is accommodated along the shape of the filter 36 along the aperture shape of the inner surface of the pipe 43, the pipe 43 is housed.
Can be made smaller than the dimension L1 of the pipe portion 43 shown in FIG. Therefore, in the case of the configuration shown in FIG. 8, the size of the pump cover 44 and the size of the compressor can be reduced.

Embodiment 3 Next, another embodiment of the positive displacement pump will be described with reference to FIGS. FIG. 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 components constituting the positive displacement pump, and FIG. 11 is a compression view showing an assembled state of an assembly. It is a longitudinal section of a machine.
The inner rotor 321 is formed by the oil reservoir side end surface 38 of the main shaft 3.
Is rotated 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 concave portion 391 for accommodating the pump port 40. In addition, the pump port 40 includes a pump storage section 404 formed at an eccentric position with respect to the shaft center for storing the oil pump section 32, an inlet port 402, and an outlet port 4.
01 are formed respectively. The disc spring 42 is applied to the lower end surface 403 of the pump port 40 and urges the same upward as in the second embodiment. Further, on the upper surface of the pump cover 44, a concave portion 441 (an example of a support portion) that fits with the lower portion of the pump port 40, prevents the pump port 40 from being displaced in the radial direction, and positions the pump port 40 at a predetermined position. Is formed.

Next, a method of assembling a 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. Subsequently, the lower part of the pump port 40 is
1 and mounted on the disc spring 42. Then, the oil pump section 32 is stored in the pump section storage section 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 FIG.

According to this assembling method, by assembling the components from the disc spring 42 to the pump case 39 in order on the pump cover 44, the positive displacement pump assembly 45 (see FIG. 11) is integrated. Assembled. At the time of assembling the assembly 45, the components are accurately positioned at the respective predetermined positions, so that they do not shift in the radial direction. Therefore, as shown in FIG. 11, there is no need to turn the compressor upside down as in the prior art when assembling the oil pump portion, and the assembly 45 is attached to the sub-frame 6 while the compressor remains in the same posture as when completed. It is relatively easy to assemble the pump unit housing 61. As a result, it has become possible to automate the assembly of the positive displacement pump to the compressor. In addition, a work space for turning the compressor upside down is not required.

[0029]

According to the oil supply device for a compressor of the present invention,
Since the filter provided in the pipe portion for guiding the lubricating oil to the oil pump unit, for example, foreign matter mixed in the lubricating oil occurs in a compressor is trapped in the filter, not brought to the oil pump unit and the frame or subframe. This prevents abnormal wear and seizure, for example, the bearing portion of the frame or sub-Muremu. When the oil pump section is a positive displacement pump having a trochoidal tooth profile or the like, breakage of the tooth profile can be prevented. Furthermore, a filter is installed in the pipe section.
Easy to assemble due to internal organs.

Further, even in a configuration provided with a filter for trapping foreign matter in the compressor, the filter is provided on the pipe along the shape of the pipe, so that a new filter for providing a filter is provided on the pipe. It requires no space and therefore does not result in a larger compressor. The foreign matter in the lubricating oil is captured in a relatively large space between the outer surface of the large-diameter portion of the filter and the inner surface of the pipe on the downstream side in the pumping direction, so that the clogged area of the filter due to the captured foreign matter is reduced. The small and lubricating oil smoothly passes through the filter along the axis of the pipe. As a result, the pump efficiency of the oil pump section hardly decreases.

Further, when a positive displacement pump is used as the oil pump section, the positive displacement pump is positioned and supported in advance on a pump cover for holding the positive displacement pump on the lower surface of the lower frame, and is integrally formed. . Then, since the integral positive displacement pump and pump cover need only be fixed to the lower surface of the lower frame in the posture at the time of completion, the process of assembling the positive displacement pump to the compressor becomes easy. Therefore, when assembling the positive displacement pump, for example, there is no need to manually turn the compressor upside down, and the assembling process of 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 the drawings]

FIG. 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 section according to Embodiment 1 of the present invention.

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

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

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

FIG. 7 is a longitudinal sectional view of a pump cover and a filter according to Embodiment 2 of the present invention.

FIG. 8 is a longitudinal sectional view of another pump cover and a filter according to Embodiment 2 of the present invention.

FIG. 9 is an enlarged vertical sectional view of an oil pump section 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 longitudinal sectional view showing an assembled state of an oil pump assembly according to Embodiment 3 of the present invention.

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

FIG. 13 is a longitudinal sectional view of a scroll compressor according to another example of the related art.

[Explanation of symbols]

Reference Signs List 1 fixed scroll 2 swinging scroll 3 main shaft 5 frame (upper frame) 6 subframe (lower frame) 7 motor 8 shell 32 oil pump section 36 filter 43 pipe section 44 pump cover 45 assembly 441 recess

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-334701 (JP, A) JP-A-60-100588 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 18/02 311 F04C 29/00 F04C 29/02 311 F04C 29/02 341

Claims (3)

(57) [Claims] 1. A compression section provided in a shell to form a compression chamber by combining a scroll or the like, a motor section housed in the shell to drive the scroll or the like, and a motor section connected to the scroll or the like and connected to the motor section. A main shaft that rotates synchronously, a frame and a subframe that rotatably supports the main shaft, an oil pump unit that pumps lubricating oil stored between the subframe and the bottom of the shell, Connected and fixed, guides lubricating oil to the oil pump section and lubricates the subframe side with a large diameter section
Pipe section having a tapered section so that the oil side has a small diameter section
An oil supply device for a compressor, comprising: a filter configured to remove dust contained in the large-diameter portion of the pipe portion . 2. A compression section provided in a shell to form a compression chamber by combining a scroll or the like, a motor section housed in the shell to drive the scroll or the like, and a motor section connected to the scroll or the like and connected to the motor section. A main shaft that rotates synchronously, a frame and a subframe that rotatably supports the main shaft, an oil pump unit that pumps lubricating oil stored between the subframe and the bottom of the shell, A pipe portion which is connected and fixed and guides the lubricating oil to the oil pump portion and is formed to have a large-diameter portion on the sub-frame side and a small-diameter portion on the lubricating oil side; and a small-diameter portion of the pipe portion provided on the pipe portion. An oil supply device for a compressor, comprising: a filter having a substantially conical shape formed so as to be thin on the side and thick on the large diameter side of the pipe portion. A compression section provided in the shell to form a compression chamber by combining a fixed scroll and an orbiting scroll; a motor section housed in the shell to drive the orbiting scroll; A main shaft that is connected and rotates in synchronization with the motor unit, an upper frame and a lower frame that rotatably support the main shaft, and an oil that pumps up lubricating oil stored between the lower frame and the bottom of the shell. In a refueling apparatus for a compressor comprising a pump section, a pipe section fixedly connected to the main shaft and guiding lubricating oil to the oil pump section, a volume constituting the oil pump section in a compressor oil supply device comprising a filter provided in the pipe section. Type pump,
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, wherein the pump cover and the positive displacement pump are integrally formed by being positioned and supported on a support portion, and the integral pump cover and the positive displacement pump are fixed to a lower surface of the lower frame. .