WO2017217523A1

WO2017217523A1 - Compressor

Info

Publication number: WO2017217523A1
Application number: PCT/JP2017/022252
Authority: WO
Inventors: 兼杉　啓一; 佐藤　正幸
Original assignee: 株式会社ヴァレオジャパン
Priority date: 2016-06-17
Filing date: 2017-06-16
Publication date: 2017-12-21

Abstract

[Problem] To provide a compressor that is capable of preventing an oil supply passage from being clogged even when there is a foreign object in the structure in which lubricating oil, stored in an oil storage chamber located in a high-pressure region, is supplied through the oil supply passage that is provided with an orifice to the portion of relatively low pressure. [Solution] A rear head (3) is provided with an oil supply passage (45) that connects an oil storage chamber (38) and a back-pressure recess (46). A filter assembly (50) in which a strainer (51) and an orifice (54) are integrally formed is provided midway of the oil supply passage (45). The oil supply passage (45) is configured by arranging a first oil supply hole (45a) bored from a first direction and a second oil supply hole (45b) bored from a second direction so as to intersect each other inside the rear head (3).

Description

Compressor

The present invention relates to a compressor that supplies lubricating oil stored in an oil storage chamber provided in a high-pressure region to each part through an oil supply passage, and in particular, stably supplies the lubricating oil regardless of foreign matters in the oil supply passage. It is related with the compressor which can do.

In the refrigeration cycle, lubricating oil is mixed in the refrigerant gas in order to lubricate the sliding parts of the compressor compression mechanism and bearings. The lubricating oil is mixed with the refrigerant gas and compressed. If it is circulated from the compressor into the refrigeration cycle, the lubricating oil of the compressor may be depleted and lubrication to each sliding portion may be insufficient. For this reason, in order to suppress the outflow of the lubricating oil from the compressor to the refrigerant circuit, an oil separator that separates the lubricating oil from the working fluid compressed by the compression mechanism is provided, and the separated lubricating oil is subjected to a pressure difference in the compressor. There is known a compressor that supplies each of the sliding portions using the above.

For example, Patent Document 1 discloses a vane type compressor that supplies lubricating oil stored in an oil sump to a vane chamber from a Sarai groove through a passage provided in a rear side block. Since the lubricating oil stored in the oil reservoir is pressurized by the high-pressure refrigerant gas discharged from the compression mechanism, it is supplied to the relatively low-pressure Sarai groove through the passage due to the pressure difference.

Since the throttle is provided in the middle of this passage, the pressure is reduced when the lubricating oil passes through the throttle, and the high-pressure lubricating oil is prevented from being supplied to the Sarai groove as it is.

However, foreign matter such as contamination may be precipitated in the lubricating oil stored in the oil sump. For this reason, when the foreign matter is supplied together with the lubricating oil through the passage, the throttle is clogged, and the supply of the lubricating oil to the saray groove may be hindered.

Therefore, as shown in FIG. 7, in the configuration in which the orifice 145c is arranged at the outlet of the oil supply passage 145 formed in the side block 103, a configuration in which a filter 150 is provided at the inlet of the oil supply passage 145 is conceivable.

With such a configuration, even if foreign matter enters from the entrance of the oil supply passage 145, it is possible to prevent the foreign matter from being captured by the filter 150 and enter the oil supply passage 145. It is possible to prevent the orifice 145c formed at the outlet of the nozzle from being blocked by foreign matter and obstructing the supply of the lubricating oil.

JP 2000-265984 A

However, in this configuration, since the filter 150 is provided at a location away from the location where the orifice 145c is provided, foreign matter remaining in the oil supply passage before the filter 150 is attached is filtered. There was a possibility that such residual foreign matter could block the orifice because it could not be captured.

In particular, when the oil supply passage 145 is formed by intersecting the first passage 145a and the second passage 145b drilled from a different direction from the first passage, the remaining portion of the intersecting and communicating portions A bag path portion 145a4 is formed in the portion. The foreign matter accumulated in the bag path portion 145a4 is difficult to be removed in the cleaning process at the time of manufacturing the part, and there is a problem in that a residual foreign matter that blocks the orifice is generated.

The present invention has been made in view of such circumstances, and has as its main object to provide a compressor capable of stably supplying lubricating oil even if foreign matter remains in the oil supply passage.

In order to achieve the above object, a compressor according to the present invention includes a compressor mechanism that compresses and discharges a fluid containing lubricating oil, and a lubricant that is disposed in a high-pressure region and that discharges the lubricating oil from the fluid discharged from the compression mechanism. An oil separator to be separated; an oil storage chamber for storing lubricating oil separated by the oil separator; and an oil supply passage that communicates the oil storage chamber with a low pressure region whose pressure is lower than the pressure of the high pressure region, A filter for capturing foreign matter from the fluid passing through the oil supply passage and an orifice for reducing the pressure of the fluid passing through the oil supply passage are provided in the oil supply passage in this order with respect to the fluid flow direction. Yes.

According to the above configuration, the filter that captures foreign matter from the fluid that passes through the oil supply passage and the orifice that reduces the pressure of the fluid that passes through the oil supply passage are disposed in the oil supply passage in this order with respect to the flow direction of the fluid. Since it is provided together, the lubricating oil filtered by the filter is always supplied to the orifice, and the possibility that the orifice is blocked by foreign matter can be eliminated.

As a method of arranging the filter and the orifice in the oil supply passage, a filter assembly in which the filter and the orifice are integrally formed may be provided in the oil supply passage.

With such a configuration, it is possible to easily install the filter and the orifice in the oil supply passage, and it is possible to prevent the negligence of forgetting to install one of them.

Further, in a configuration in which the oil supply passage is formed by intersecting two oil supply holes having different directions, a filter assembly may be provided upstream of a location where the two oil supply holes intersect. By doing in this way, even if foreign matter that has not been removed by washing remains in the bag path formed at the intersecting location, the orifice is provided upstream of the bag path, and thus is blocked by the foreign object. There is no fear.

Further, in a configuration in which the oil supply passage is formed by intersecting two oil supply holes having different directions, a filter assembly may be provided downstream of a location where the two oil supply holes intersect. By doing in this way, even if foreign matter that has not been removed by washing remains in the narrow path portion formed at the intersecting location, the lubricating oil that has been filtered out by the filter can flow to the orifice. There is no risk of being blocked by foreign matter.

As described above, according to the present invention, the compressor mechanism that compresses and discharges the fluid containing the lubricating oil, and the oil separation that is disposed in the high pressure region and separates the lubricating oil from the fluid discharged from the compression mechanism. A compressor, an oil storage chamber that stores the lubricating oil separated by the oil separator, and an oil supply passage that communicates the oil storage chamber with a low pressure region that is lower in pressure than the high pressure region. Since a filter for capturing foreign matter from the fluid passing through the oil supply passage and an orifice for reducing the pressure of the fluid passing through the oil supply passage are provided in the oil supply passage in this order with respect to the flow direction of the fluid. Therefore, it is possible to eliminate the possibility that the orifice is blocked by the foreign matter.

It is a sectional side view showing the compressor concerning a 1st embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 2 is a cross-sectional view taken along line BB in FIG. It is a sectional side view which shows an example of a filter assembly. It is a figure which shows the oil supply path of the 1st Embodiment of this invention, (a) is a sectional side view of an oil supply path, (b) is a sectional side view which attached the filter assembly to the oil supply path. It is a figure which shows the oil supply path of the 2nd Embodiment of this invention, (a) is a sectional side view of an oil supply path, (b) is a sectional side view which attached the filter assembly to the oil supply path. It is a sectional side view which shows the conventional structure by which the orifice and the filter are separately provided in the oil supply channel | path.

Hereinafter, embodiments of a compressor according to the present invention will be described with reference to the accompanying drawings.

(First embodiment)
1 and 2 show a vane type compressor suitable for a refrigeration cycle using a refrigerant as a working fluid. The vane compressor 1 is inserted into a cylinder 5, a rotor 7 rotatably accommodated in the cylinder 5, and fixed to a drive shaft 6, and a plurality of vane grooves 8 provided in the rotor 7. The vane 9, the rear head (rear side member) 3 that closes the rear side end surface of the cylinder 5, the front side end surface of the cylinder 5 is closed, the outer peripheral surface of the cylinder 5 is surrounded, and is fitted to the rear head 3. And a front head (front side member) 2.

The cylinder 5 is formed with a hole having an elliptical cross section, and a rotor 7 fixed to the drive shaft 6 is rotatably accommodated in the cylinder 5. The rotor 7 has a cylindrical shape with a perfectly circular cross section having the same diameter as the ellipse minor axis of the cylinder 5, and the cylinder is arranged so that the inner peripheral surface of the rotor 7 and the minor axis part of the cylinder 5 are close to each other. By arranging the rotor 7 at the center of 5, two compression spaces 10 are formed between the inner peripheral surface of the long diameter portion of the cylinder 5 and the outer peripheral surface of the rotor 7.

A plurality of vane grooves 8 provided in the rotor 7 are formed in parallel to the drive shaft 6 and at equal intervals in the circumferential direction (five in this example). The rotor 7 is provided so as to be inclined at a predetermined angle in the rotation direction of the rotor 7 with respect to the radial direction from the center.

Each vane 9 is slidably inserted into each vane groove 8 and is urged radially outward by the centrifugal force accompanying the rotation of the rotor 7 and the pressure supplied to the bottom of the vane groove 8. It comes in sliding contact with the inner wall of the elliptical hole. Therefore, the compression space 10 is partitioned by the vanes 5 to be formed into a plurality of compression chambers 25, and the volume of each compression chamber 25 is such that the vane 9 rotates from the long diameter portion to the short diameter portion of the elliptical hole of the cylinder 5 as the rotor 7 rotates. The pressure gradually decreases as the flow proceeds to, and the working fluid in the compression chamber 25 is compressed.

The drive shaft 6 is rotatably supported by the front head 2 and the rear head 3 via

bearings

11 and 12, and one end portion thereof protrudes from the front head 2. A driving pulley is connected to a portion of the driving shaft 6 protruding from the front head 2 via an electromagnetic clutch (not shown) so that rotational power is transmitted from the engine of the vehicle via a driving belt. Further, one end side of the drive shaft 6 is hermetically sealed with the front head 7 through a shaft seal 13 provided between the drive shaft 6 and the front head 2.

The front head 2 is formed by integrating a side block portion 21 that contacts the cylinder 5 and a shell portion 22 that surrounds a portion of the cylinder 5 and the rear head 3. The front head 2 includes a working fluid (refrigerant). A suction port 23 for sucking gas) and a suction chamber (low pressure chamber) 24 through which the suction port 23 communicates are formed. The suction chamber 24 communicates with the compression chamber 25 from the front in the rotation direction of the rotor 7 to the vicinity of the long diameter portion of the elliptic hole with respect to the short diameter portion of the elliptic hole of the cylinder 5.

The cylinder 5 is formed with flange portions 29 projecting in the radial direction at both ends in the axial direction, and each flange portion 29 is formed in a shape matching the inner peripheral shape of the shell forming portion 22 of the front head 2. Has been. In a state in which a part of the cylinder 5 and the rear head 3 is inserted into the shell portion 22 of the front head 2, the front side end surface including the flange portion 29 of the cylinder 5 is in contact with the end surface of the side block portion 21 of the front head 2. In addition, the rear side end surface including the flange portion 29 of the cylinder 5 is in contact with the end surface of the rear head 3.

A discharge port 26 that can communicate with the compression chamber 25 is provided on the outer peripheral surface of the cylinder 5 in the vicinity of the short diameter portion of the elliptical hole of the cylinder 5. A discharge chamber 28 defined between flange portions 29 formed at both ends of the cylinder 5 is formed between the outer peripheral surface of the cylinder 5 and the inner peripheral surface of the shell portion 22 of the front head 2. Yes. The discharge port 26 opens into the discharge chamber 28, and the compression chamber 25 formed between the vanes can communicate with the discharge chamber 28 via the discharge port 26. The discharge port 26 is opened and closed by a discharge valve 27 accommodated in the discharge chamber 28.

As shown in FIGS. 1 and 3, the end surface of the rear head 3 facing the cylinder 5 is provided with a side block portion 31 slidably adjacent to the end surface of the rotor 7, and radially outward of the side block portion 31. A plurality of recesses separated along the circumferential direction are formed. When the end face of the rear head 3 comes into contact with the cylinder 5, these recesses are closed, and the first high pressure chamber 32, the second high pressure chamber 40, the first oil storage chamber 38a, and the second oil storage chamber 38b are formed. The first high pressure chamber 32 and the discharge chamber 28 communicate with each other through a through hole 30 formed in the flange portion 29.

Further, a back pressure recess 46 is formed in the center of the end face of the rear head 3 facing the cylinder head to introduce back pressure in communication with the bottom of the vane groove 8 of the rotor 7.

Further, the rear head 3 is provided with a centrifugal oil separator 33 for separating lubricating oil mixed in the discharge gas. The oil separator 33 is formed integrally with the rear head 3 and includes an oil separation chamber 35 that forms a cylindrical space that communicates with the first high-pressure chamber 32 via the introduction hole 34. A substantially cylindrical separation cylinder (separator pipe) 36 formed integrally with the rear head 3 is arranged on the same axis 35.

The oil separation chamber 35 is formed so as to extend in a direction substantially perpendicular to the axial direction of the drive shaft 6 and to have its axis inclined obliquely with respect to the vertical line. The upper end portion of the oil separation chamber 35 communicates with the second high pressure chamber 40 through a hole formed in the center of the separation cylinder 35, and further communicates with the discharge port 41 through the second high pressure chamber 40. . Further, the lower end portion of the oil separation chamber 35 opens to the outer peripheral surface of the rear head 3, and this opening portion is hermetically sealed by the lid member 15. Further, an oil drain hole 37 communicating with a first oil storage chamber 38 a provided in the lower portion of the compressor 1 is formed in the lower portion of the oil separation chamber 35.

A communicating recess 39 (indicated by a one-dot chain line in FIG. 3) extending along the circumferential direction is formed at the lower portion of the end surface of the cylinder 5 facing the rear head 3. The communication recess 39 communicates with the first oil storage chamber 38a on one end side in the circumferential direction, and communicates with the second oil storage chamber 38b on the other end side in the circumferential direction.

Therefore, the working fluid that has flowed into the oil separation chamber 35 swirls around the separation cylinder 36 provided in the oil separation chamber 35, and the mixed lubricating oil is separated in the process. The discharge gas from which the lubricating oil has been separated and removed is guided to the second high-pressure chamber 40 through the hole in the center of the separation cylinder 36 and then sent to the refrigeration cycle through the discharge port 41.

In addition, the lubricating oil separated in the oil separation chamber 35 is guided and stored in the first oil storage chamber 38 a through the oil drain hole 37 provided in the lower portion of the oil separation chamber 35, and also through the communication recess 39. It is led and stored in the second oil storage chamber 38b.

Further, as shown in FIGS. 3 and 5A, the rear head 3, which is one of the members constituting the compression mechanism, has an oil supply passage 45 that guides the lubricating oil stored in the oil storage chamber 38 to the back pressure recess 46. Is provided. The oil supply passage 45 is formed between the first oil storage chamber 38a and the second oil storage chamber 38b and at a location facing the communication recess 39 of the cylinder 5 in a direction parallel to the axis of the compressor 1. The first oil supply hole 45 a and the second oil supply hole 45 b formed by inclining radially outward from the back pressure concave portion 46 with respect to the axis of the compressor 1 are crossed inside the rear head 3. It is formed by communicating.

The first oil supply hole 45a has a large diameter portion 45a1 formed over a predetermined depth from the vicinity of the inlet, and a medium diameter formed to a depth slightly smaller than the large diameter portion 45a1 and deeper than the large diameter portion 45a1. Part 45a2. The large-diameter portion 45a1 and the medium-diameter portion 45a2 are formed so as to be continuously arranged with their centers aligned.

As described above, the second oil supply hole 45b is formed by inclining radially outward from the back pressure recess 46 with respect to the axis of the compressor 1. The diameter of the second oil supply hole 45b is smaller than the diameter of the middle diameter part 45a2 of the first oil supply hole 45a, and the bottom end of the second oil supply hole 45b is on the side surface near the bottom end of the medium diameter part 45a2. It is drilled to intersect.

Therefore, the oil storage chamber 38 and the back pressure recess 46 communicate with each other via the communication recess 39 of the cylinder 5, the first oil supply hole 45a, and the second oil supply hole 45b.

Further, in the middle of the oil supply passage 45, a filter for capturing foreign matter from the lubricating oil passing through the oil supply passage 45 and an orifice for reducing the pressure of the lubricating oil passing through the oil supply passage are provided in the direction of the lubricating oil flow. On the other hand, they are provided in this order.

In this example, as shown in FIG. 4, a filter assembly 50 in which a strainer 51 and a cap 53 having an orifice 54 are integrally formed is attached to the inlet of the first oil supply hole 45a. A filter (strainer) and an orifice are provided side by side.

More specifically, the filter assembly 50 includes a bottomed cylindrical cap 53 having an orifice 54 formed at the bottom, a strainer 51 disposed inside the cap 53 and formed of a metal net in a basket shape, and a cap. 53 and the strainer 51 are configured by a ring-shaped holder 52 that holds the open ends in a state in which both open ends overlap each other.

The outer diameter of the holder 52 is slightly larger than the large diameter portion 45a1 of the first oil supply hole 45a. The axial length of the holder 52 is slightly shorter than the depth of the large diameter portion 45a1. Accordingly, as shown in FIG. 5B, the filter assembly 50 is lightly press-fitted into the first oil supply hole by pushing the filter assembly 50 from the inlet of the first oil supply hole to the end surface of the rear head 3. Fixed.

On the other hand, the inner diameter of the middle diameter portion 45a2 of the first oil supply hole 45a is smaller than the outer diameter of the holder 52 of the filter assembly 50 and larger than the outer diameter of the cap 53 of the filter assembly 50. This prevents the filter assembly 50 from being pushed further beyond the depth of the large diameter portion 45a1.

Since the second oil supply hole 45b and the first oil supply hole 45a (medium diameter portion 45a2) intersect at a position deeper than the filter assembly 50 inserted into the first oil supply hole 45a, the medium diameter The intersecting portion opened to the side surface of the portion 45 a 2 is not blocked by the check valve assembly 50.

In the above configuration, when the compressor 1 is operated, the high-pressure working fluid compressed in the compression chamber 25 is discharged to the discharge chamber 28 via the discharge port 26, and the first high-pressure chamber via the through hole 30. 32 to the oil separator 33. The working fluid contains lubricating oil, and the lubricating oil separated by the oil separator 33 is stored in the oil storage chamber 38 through the oil drain hole 37.

The oil storage chamber 38 is in a high pressure region where the high pressure of the discharge chamber 28 acts almost as it is through the above-described path. On the other hand, the back pressure recess 46 is in a region where the pressure is lower than the high pressure region because the internal working fluid leaks into the compression chamber 25 through the gap between the side block portion 31 and the rotor 7. For this reason, the lubricating oil stored in the oil storage chamber 38 is fed into the oil supply passage 45 through the communication recess 39 due to the difference between the pressure in the oil storage chamber 38 and the pressure in the back pressure recess 46.

The lubricating oil stored in the oil storage chamber may be mixed with wear powder generated in the compression mechanism and foreign matter sucked from the refrigeration cycle outside the compressor 1. However, since the filter assembly 50 in which the strainer 51 and the orifice 54 are integrally formed is provided in the middle of the oil supply passage 45, the lubricating oil that captures and removes the foreign matter by the strainer 51 is provided in the orifice 54 provided downstream. Sent out. As a result, the lubricating oil that has been properly depressurized by the orifice 54 is supplied to the back pressure recess 46 without the orifice 54 being blocked by foreign matter.

Since the pressure is reduced when the lubricating oil passes through the orifice 54, a pressure difference is generated between the upstream and downstream of the cap 53 where the orifice 54 is formed. For this reason, there is a possibility that the filter assembly 50 may be pushed into the first oil supply hole 45a due to this pressure difference. However, since the inner diameter of the middle diameter portion 45a2 is sufficiently smaller than the inner diameter of the large diameter portion 45a1 into which the holder 52 of the filter assembly 50 is press-fitted, the filter assembly 50 is not pushed in due to a pressure difference. .

By the way, when the rear head 3 is formed by die casting, it is conceivable to perform an impregnation treatment after the processing step in order to eliminate the fear of casting hole leakage. When such impregnation treatment is performed, it is necessary to perform sufficient cleaning to remove the impregnating agent that has entered the holes of each part, but the oil supply passage is formed by intersecting two oil supply holes with different directions. In this case, a portion further on the back side than the intersecting portion of the oil supply passages becomes a bag path (reference numeral 45a4 in FIGS. 5 and 7 and reference numeral 145a4 in FIG. 8) in which the fluid does not easily flow. For this reason, it is conceivable that the impregnating agent used for the impregnation treatment is not washed while solidified in the bag path portions 45a4 and 145a4, but falls off during the compressor operation and flows downstream.

For this reason, in the conventional configuration shown in FIG. 7, the impregnating agent C remaining in the bag path portion 145a4 may fall off during operation and block the downstream orifice 145c, but in this embodiment, Since the orifice 54 is not provided downstream of the bag path 45a4, there is no possibility that the orifice is blocked by foreign matter and the supply of lubricating oil is hindered.

(Second Embodiment)
FIG. 6A shows an oil supply passage 45 according to the second embodiment of the present invention. The second embodiment is provided with a small-diameter portion 45a3 having a smaller outer diameter in place of the medium-diameter portion 45a2 in that the large-diameter portion 45a1 is formed deeper than the first embodiment. Only the points differ from the first embodiment. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

The first oil supply hole 45a includes a large-diameter portion 45a1 formed from the vicinity of the inlet to a predetermined depth, and a small-diameter portion 45a3 formed to a depth smaller than the large-diameter portion 45a1 and deeper than the large-diameter portion 45a1. It has. The large-diameter portion 45a1 and the small-diameter portion 45a3 are formed so as to be connected with their centers aligned.

The second oil supply hole 45b is formed so as to incline radially outward from the back pressure recess 46 with respect to the axis of the compressor 1. The diameter of the second oil supply hole 45b is smaller than the diameter of the small diameter part 45a3 of the first oil supply hole 45a, and the bottom end of the second oil supply hole 45b is formed so as to intersect the side surface of the small diameter part 45a3. ing.

As shown in FIG. 6B, a filter assembly 50 similar to that of the first embodiment is attached to the inlet of the first oil supply hole 45a. In the second embodiment, unlike the first embodiment, the large-diameter portion 45a1 into which the outer diameter of the holder 52 is press-fitted includes not only the holder 52 but also the entire filter assembly 50 including the cap 53. It has a depth that can be.

Also, instead of the medium diameter portion 45a2 of the first embodiment, a small diameter portion 45a3 is provided so as to be connected to the large diameter portion 45a1 of the first oil supply hole 45a. The inner diameter of the medium diameter portion 45 a 2 is larger than the outer diameter of the cap 53 of the filter assembly 50, whereas the inner diameter of the small diameter portion 45 a 3 is smaller than the outer diameter of the cap 53. For this reason, the filter assembly 50 is prevented from being pushed further beyond the depth of the small diameter portion 45a3.

In particular, in the first embodiment, when the caulking of the holder 52 and the cap 53 is loosened, only the cap 53 falls to the bottom of the middle diameter portion 45a2 and closes the intersection hole with the second oil supply hole. In this second embodiment, since the cap 53 cannot enter the small diameter portion 45a3, the cap 53 is prevented from falling and the intersection hole with the second oil supply hole is blocked. The fear of peeling off can be eliminated.

In the above-described example, the filter assembly 50 is configured such that the strainer 51 and the cap 53 in which the orifice 54 is formed are caulked and fixed by the holder 52, but the strainer 51 is caulked and fixed directly to the cap 53. The filter assembly 50 may be used.

In the above-described example, the filter assembly 50 is provided at the inlet of the oil supply passage 45, but may be provided at the outlet side of the oil supply passage 45.

DESCRIPTION OF SYMBOLS 1 Compressor 2 Front head 3 Rear head 5 Cylinder 6 Drive shaft 7 Rotor 28 Discharge chamber 33 Oil separator 35 Oil separation chamber 36 Oil separation cylinder 37 Oil drain hole 38 Oil storage chamber 39 Communication recess 45 Oil supply passage 45a First oil supply hole 45a1 Large diameter portion 45a2 Medium diameter portion 45b Second oil supply hole 46 Back pressure concave portion 50 Filter assembly 51 Strainer 52 Holder 53 Cap 54 Orifice C Foreign matter

Claims

A compression mechanism that compresses and discharges a fluid containing lubricating oil; an oil separator that is disposed in a high pressure region and separates the lubricating oil from the fluid discharged from the compression mechanism; and the lubricating oil separated by the oil separator And an oil supply passage that communicates the oil storage chamber with a region where the pressure is lower than the pressure of the high pressure region,
A filter for capturing foreign matter from the fluid passing through the oil supply passage and an orifice for reducing the pressure of the fluid passing through the oil supply passage are provided in the oil supply passage in this order with respect to the fluid flow direction. Compressor.
2. The compressor according to claim 1, wherein a filter assembly in which the filter and the orifice are integrally formed is provided in the oil supply passage so that the filter and the orifice are provided in the oil supply passage.
The oil supply passage has a first oil supply hole drilled from a first direction of the member in one of the members constituting the compressor mechanism, and a second different from the first direction. The compressor according to claim 1 or 2, wherein the compressor is formed by intersecting the second oil supply holes drilled from the direction of.
The said filter assembly is provided in the upstream of the flow direction with respect to the cross | intersection location of the said 1st oil supply hole and the said 2nd oil supply hole in the said oil supply channel | path. Compressor.
The said filter assembly is provided in the downstream of the flow direction with respect to the cross | intersection location of the said 1st oil supply hole and the said 2nd oil supply hole in the said oil supply channel | path. Compressor.
The compression mechanism includes a cylinder that is closed when both sides in the axial direction are sandwiched between side members, a rotor that is accommodated in the cylinder and has a plurality of vane grooves, and a vane groove of the rotor. A vane that is housed and slides on the inner peripheral surface of the cylinder with its tip protruding and retracting from the vane groove, and rotatably supported by the side members on both sides and connected to the rotor to receive a rotational force from the outside. A drive shaft that transmits to the rotor,
The compressor according to any one of claims 3 to 5, wherein the oil supply passage is provided in one of the side members.