JPH08284861A - Oil feeding structure of compressor - Google Patents

Abstract

PURPOSE: To provide an oil feeding structure of a compressor, capable of feeding a specified position with lubricating oil in a simple oil feeding passage structure. CONSTITUTION: A compressor housing is composed of a center housing 1 and a motor housing 4 joined together. A lubricating oil sump 35, where lubricating oil remains staying, is formed in this motor housing 4. With differential pressure lying between a high pressure storage chamber 32 and a low pressure suction port 25, lubricating oil in the lubricating oil sump 35 is mixed in suction refrigerant gas via a lower interconnecting port 36, an oil feeding passage 40 and an upper communicating port 37, and thus this oil is fed to each sliding part. This oil feeding passage 40 is formed in use of a joined part between both these housings 1 and 4. In brief, a ring groove is formed in an end face 2a of the center housing 1, and this ring groove is closed by an end face 5a of the motor housing 4, forming a closed space, through which the oil feeding passage 40 is formed up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply structure for supplying lubricating oil to each sliding portion in a compressor.

[0002]

2. Description of the Related Art As an oil supply structure for a compressor of this type, for example, a scroll type compressor, there is a technique disclosed in JP-A-64-87894. In this disclosed technique, the pipe material is arranged in the internal space of the closed container constituting the housing so that the lubricating oil reservoir formed at the bottom of the pipe material communicates with the bearing portion of the drive shaft of the compressor. Further, a viscous pump is provided on the drive shaft. Then, the sliding oil of the movable scroll drive mechanism is lubricated by the differential pressure between the high-pressure closed container side and the low-pressure bearing side and the lubricating oil pumped up by the action of the viscous pump.

In addition to the above publications, there is also a technique in which fine holes or the like are provided inside the housing, and the lubricating oil in the lubricating oil sump is pumped up by the differential pressure and supplied to the bearing or the like.

[0004]

However, in the above-mentioned conventional publication, the oil supply passage made of a pipe material, the pump and the like are provided, and the number of parts is increased. Further, in order to ensure that the pumping force of the pump and the differential pressure between the closed container side and the bearing side act on the lubricating oil, the airtightness of the joint between the pipe material and the bearing must be increased. It is necessary to add a sealing function to this joint part. As described above, the technology of the publication makes the oil supply structure complicated.

Further, in the latter prior art, in most cases, it is difficult to provide a hole for linearly connecting the lubricating oil sump and the bearing etc. due to structural restrictions. Therefore, a complicated shape of the oil supply passage has been formed by combining oblique holes (holes that bypass the oil supply passage according to the internal shape of the housing) and the like. Therefore, the processing of the oil supply passage has been complicated.

The present invention has been made to solve the above problems, and an object thereof is to provide an oil supply structure for a compressor which has a simple structure and can supply lubricating oil to a predetermined position. .

[0007]

In order to achieve the above object, in the invention of claim 1, the housing includes a first housing and a second housing joined to the first housing. The compressor oil supply structure has an oil supply passage formed along at least one of the joint ends of the first housing and the second housing along the extending direction of the joint.

According to the second aspect of the invention, the oil supply passage is formed in an annular shape along the joint between the first housing and the second housing. In the invention of claim 3, the first or second housing is formed with a communication hole for communicating the oil supply passage and the lubricating oil sump or the oil supply passage and the low pressure portion, and the throttle member is provided in the communication hole. Was inserted and placed.

According to the invention of claim 4, the oil supply passage is formed in one housing, and the communication hole is formed in the other housing. By shifting the connection position between the communication hole and the oil supply passage, The parts make up the aperture.

According to the fifth aspect of the invention, an annular seal groove is formed on the joint surface between the first housing and the second housing, and a seal member for sealing the joint surface of both housings is formed in the seal groove. It is accommodated, and the seal groove is formed wider than the seal width and also serves as the oil supply passage.

According to the invention of claim 6, the oil supply passage is connected to an intake port for introducing gas from the outside.

[0012]

In the invention according to claim 1 having the above-mentioned structure, the lubricating oil accumulated in the inner bottom portion of the high pressure portion is passed through the oil supply passage to the predetermined position of the low pressure portion based on the differential pressure between the low pressure portion and the high pressure portion. Is supplied to.

In the present invention, the oil supply passage is formed on at least one joint end surface of the first or second housing along the extending direction of the joint.
That is, for example, a groove can be formed in the joint end surface of one housing, and the groove can be closed by the joint end surface of the other housing to form an oil supply passage. The oil supply passage can be formed with such a simple structure, and it is not necessary to incorporate a pipe member or the like, which is a separate member, as in the conventional case.

Further, since the joint surface of the housing is used, the shape of the oil supply passage is hardly affected by the internal shape of the housing, and the complicated shape of the oil supply passage can be prevented. In the invention of claim 2, since the oil supply passage has an annular shape, for example, a hole that communicates the oil supply passage and the supply position or the oil supply passage and the lubricating oil sump can be easily drilled from any position in the housing. Become.

According to the third aspect of the present invention, the throttle member inserted and arranged in the communication hole makes it easy to arbitrarily adjust the amount of the lubricating oil, and the fine holes which are difficult to process are unnecessary. In the invention of claim 4, since the same portion is throttled by shifting the connection position between the communication hole and the oil supply passage, a separate throttle member is not required. Further, it does not require pores, and the drawn portion can be easily processed.

According to the fifth aspect of the invention, the seal groove is formed wider than the width of the seal member housed therein, and also serves as an oil supply passage. Therefore, less groove processing is required,
It becomes easy to insert the seal member into the wide groove. Further, since the seal member is always wet with the lubricating oil, the sealing function of the seal member is improved.

In the invention of claim 6, the oil supply passage is connected to the suction port. The suction port has a higher gas flow velocity than the other low-pressure portions, so that a lubricating oil suction effect due to the Venturi effect can be expected.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the center housing 1 integrally includes a peripheral wall 2 and a partition wall 3. The motor housing 4 having a substantially bottomed cylindrical shape is joined and fixed to the end surface 2α of the peripheral wall 2 of the center housing 1 by the end surface 5α of the peripheral wall 5. This center housing 1
The motor housing 4 serves as the first and second housings of this embodiment. The fixed scroll 7, which also serves as the rear housing, is joined and fixed to the end surface 2α of the center housing 1 opposite to the motor housing 4. An annular O-ring receiving groove 2β is formed on both end surfaces 2α of the peripheral wall 2 of the center housing 1, and an O-ring 6 is housed in each groove 2β. The O-ring 6 ensures the sealing performance between the housings 1, 4, and 7.

The stator 8 is fixed to the inner peripheral surface of the motor housing 4. The rotating shaft 9 is rotatably supported by the motor housing 4 and the center housing 1 via a bearing 10, and a rotor 11 made of a permanent magnet is fixed to the outer periphery of the rotating shaft 9. Therefore, when the stator 8 is supplied with electric power, the rotating shaft 9 is rotated.

The eccentric shaft 12 is provided at the tip of the rotary shaft 9 so as to project.
It is located in the center housing 1. The bush 13 is supported by the eccentric shaft 12, and a bearing 14 is fitted to the outer periphery of the bush 13. The balance weight 15 is supported by the eccentric shaft 12. The movable scroll 16 is supported by the bush 13 so as to be relatively rotatable by fitting the cylindrical boss portion 16α on the outer surface thereof to the bearing 14.

The fixed scroll 7 has a base plate 19 and a spiral wall 20 integrally formed on the inner surface thereof.
Similarly, the movable scroll 16 also includes a substrate 17 and a spiral wall 18 integrally formed on the inner surface thereof. The scrolls 7 and 16 are meshed with each other on the spiral walls 20 and 18. As a result, the compression chamber 21 is formed by the base plates 19 and 17 of both scrolls 7 and 16 and the spiral walls 20 and 18.

The orbiting ring 22 is interposed between the base plate 17 of the movable scroll 16 and the partition wall 3 of the center housing 1. A plurality of columnar rotation preventing elements 23 are fixed to the swivel ring 22. The element 2 is provided on the partition wall 3 and the substrate 17 of the movable scroll 16, respectively.
Restriction holes 17α and 3β into which 3 is inserted are formed.

Therefore, the movable scroll 16 is rotated by the eccentric shaft 12 when the rotating shaft 9 is rotated.
And the bearing 14 to revolve around the axis of the rotating shaft 9. At this time, since the element 23 on the orbiting ring 22 is inserted into the restriction holes 3β and 17α, the movable scroll 16 is restricted from rotating around its own axis. Further, the compression reaction force generated in the compression chamber 21 acts on the base plate 17 of the movable scroll 16 in the direction in which the axis of the rotating shaft 9 extends, and this reaction force is generated on the pressure receiving surface 3α via the orbiting ring 22. Be taken.

A suction chamber 24 as a low pressure portion is formed inside the center housing 1, and the eccentric shaft 12, the bush 13 on the eccentric shaft 12, the balance weight 15 and the like are arranged in the suction chamber 24. The bearing 10 on the center housing 1 side also faces the suction chamber 24. Similarly, the suction port 25, which also constitutes a low pressure part, is formed in the upper part of the center housing 1 and is connected to an external cooling circuit via a pipe (not shown). Then, the refrigerant gas introduced from the external cooling circuit through the suction port 25 flows into the compression chamber 21 between the scrolls 7 and 16 through the suction chamber 24 in the center housing 1. The discharge chamber 27 is formed in the fixed scroll 7 by being sealed by the outer wall 26. Then, the compression chamber 21 and the discharge chamber 2
7 is communicated with a discharge port 28 and a discharge valve 29. In FIG. 1, 30 is a retainer that regulates the open position of the discharge valve 29.

The discharge passage 31 is formed so as to penetrate through the fixed scroll 7 and the center housing 1, and the discharge chamber 27 is formed in the motor housing 4 as a high-pressure storage chamber 3
Connect to 2. The discharge port 33 is formed at the center of the side wall of the motor housing 4 and communicates with the accommodation chamber 32 via a passage 9α formed in the rotary shaft 9. The discharge port 33 is connected to an external cooling circuit via a pipe (not shown). The ring-shaped separating plate 34 is attached to the inner surface of the side wall of the motor housing 4 so as to surround the rotating shaft 9.

Now, the compressor of this embodiment is a horizontal type,
That is, for example, the compressor is arranged such that the rotary shaft 9 is substantially horizontal when mounted on a vehicle (arranged in the state of FIG. 1). Therefore, as described above, the suction port 25 is provided in the upper part of the center housing 1 to facilitate the pipe connection with the external cooling circuit when the compressor is mounted on the vehicle. Further, the lubricating oil separated from the discharged refrigerant gas is retained at the bottom of the accommodation chamber 32 to form a lubricating oil reservoir 35. Hereinafter, an oil supply structure for supplying lubricating oil from the lubricating oil sump 35 to the suction port 25 will be described.

As shown in FIGS. 1 and 3, the lower communication hole 36 having a circular cross section is horizontally provided in a step portion 4α formed in the inner bottom portion of the motor housing 4. In the drawing of the lower communication hole 36, the right end is opened to the lubricating oil sump 35, and the left end is opened toward the end surface 2α of the peripheral wall 2 in the center housing 1. Further, the upper communication hole 37 is horizontally provided in the upper portion of the center housing 1. In the drawing of the upper communication hole 37, the right end is opened toward the end surface 5α of the peripheral wall 5 of the motor housing 4, and the left end is opened on the inner peripheral surface of the suction port 25.

A diaphragm pin 3 as a cylindrical diaphragm member.
Reference numeral 8 is loosely inserted into the lower communication hole 36 from the center housing 1 side. Since the outer diameter of the throttle pin 38 is formed to be slightly smaller than the inner diameter of the lower communication hole 36, a cylindrical throttle passage 39 is provided in the gap between the throttle pin 38 and the lower communication hole 36. It is formed. A locking step 4β is formed between the inner bottom surface of the lower communication hole 36 and the inner bottom surface of the motor housing 4, and the right end of the aperture pin 38 is brought into contact with the wall surface of the step 4β. The throttle pin 38 is prevented from slipping out toward the lubricating oil sump 35. The end surface 2α of the center housing 1 prevents the diaphragm pin 38 from coming out to the opposite side.

In this embodiment, the joint end surface 2α between the center housing 1 and the motor housing 4 is
An oil supply passage 40 is formed in 5α, and the lower communication hole 36 and the upper communication hole 37 described above are connected via the oil supply passage 40. That is, as shown in FIG. 2, the annular groove 41 having an annular shape is formed inside the O-ring receiving groove 2β having the same annular shape on the peripheral wall end surface 2α of the center housing 1 so as to be concentric with the receiving groove 2β. ing. Then, as shown in FIGS. 1 and 3, the opening of the annular groove 41 is closed and sealed by the end surface 5α of the motor housing 4, and the annular inner space thereof constitutes the oil supply passage 40 described above.

The annular groove 41 passes through the right end opening of the upper communication hole 37. Therefore, the oil supply passage 40 and the suction port 25 are connected via the upper communication hole 37. Further, the left end opening of the lower communication hole 36 is opened toward the annular groove 41, so that the oil supply passage 40 and the lubricating oil sump 35 are connected via the lower communication hole 36. Then, the lubricating oil in the lubricating oil sump 35 is delivered to the suction port 25 through the lower communication hole 36, the oil supply passage 40 and the upper communication hole 37 due to the differential pressure between the high pressure side accommodation chamber 32 and the low pressure side suction port 25. Supplied.

Next, the operation of the scroll compressor constructed as described above will be described. When the rotor 11 and the rotary shaft 9 are rotated by energizing the coils of the stator 8, the eccentric shaft 12 eccentrically rotates the orbiting scroll 16 around the rotary shaft 9. As a result, the suction port 2
The refrigerant gas introduced from 5 flows into the suction chamber 24,
It is taken into the compression chamber 21 between the scrolls 7 and 16. Then, as the movable scroll 16 revolves, the compression chamber 21 is moved from the outer peripheral side of the spiral portion (18, 20) to the center side, and the volume is gradually reduced to perform the compression action. Therefore, the refrigerant gas is gradually compressed in the compression chamber 21,
It is discharged into the discharge chamber 27 through the discharge port 28 and the discharge valve 29. The discharged refrigerant gas is discharged into the discharge passage 31.
Through the passage 9α of the rotating shaft 9 and is discharged from the discharge port 33 to the external cooling circuit side.

Here, the discharge refrigerant gas introduced into the passage 9α of the rotary shaft 9 collides with the inner surfaces of the separation plate 34 and the accommodating chamber 32, so that the lubricating oil contained therein is separated and drops downward, The lubricating oil is accumulated at the bottom of the accommodation chamber 32 to form the lubricating oil reservoir 35 described above. Lubricating oil in the lubricating oil sump 35 is transferred to the throttle pin 38 in the lower communication hole 36 on the basis of the difference between the discharge refrigerant gas pressure in the storage chamber 32 and the suction refrigerant gas pressure sucked through the suction port 25. Throttle passage 3 between
9 and the oil supply passage 40, and is pumped through the upper communication hole 37 to the suction port 25. Then, the supplied lubricating oil is mixed with the sucked refrigerant gas and, in the process of being sucked into the suction chamber 24, lubricates the eccentric shaft 12, the bush 13, the balance weight 15 and the like arranged in the suction chamber 24. . Then, the refrigerant gas mixed with the lubricating oil is retained in the lubricating oil sump 35 again through the compression process.

Therefore, the rotating shaft 9
The rotation of is always smoothly performed with appropriate lubrication, and wear of each of these sliding parts is prevented. In the present embodiment having the above-described configuration, the oil supply passage 40 for pumping the lubricating oil to a predetermined height is formed with a simple configuration in which the annular groove 41 is provided in the joint surface 2α of the center housing 1 with the motor housing 4. . Therefore, the following effects can be achieved.

Unlike the former conventional technique, it is not necessary to mount a separate pipe material for pumping. Since the annular groove 41 can be easily processed as compared with drilling, the oil supply passage 40 is easily processed as compared with the latter conventional technique.

For example, the joint end surfaces 2α and 5α of both housings 1 and 4 which are also present in a compressor having no oil supply passage 40 (hereinafter, referred to as an existing compressor) are used. That is, the joining end surfaces 2α, 5α are not
It is not a site that is formed exclusively for the purpose of construction. Therefore,
By providing the structure of the oil supply passage 40, it is possible to suppress an increase in manufacturing cost of the compressor. Further, the joint end surfaces 2α, 5α are parts that are configured in consideration of the sealing property even in the existing compressor (for example, they appear in the O-ring 6 structure), and the oil supply passage 40 provided in the parts is newly provided. Even if the sealing property is not taken into consideration, the sealing property will be secured as a result.

Since the joint end surfaces 2α and 5α located on the outermost peripheral side of the compressor are used, the shape of the oil supply passage 40 is not restricted by the internal shape of the housings 1 and 4. Therefore,
It is possible to prevent the oil supply passage 40 from having a complicated shape by, for example, forming an oblique hole in conformity with the inner shape of the housing as in the latter conventional technique.

The lubricating oil is squeezed by the cylindrical throttle passage 39 between the lower communication hole 36 and the throttle pin 38 loosely inserted in the lower communication hole 36. Therefore, it is not necessary to form the lower communication hole 36 as a fine hole for squeezing the lubricating oil, and the lower communication hole 36 having a relatively large inner diameter and the throttle pin 38 having an outer diameter slightly smaller than the inner diameter of the lower communication hole 36 are provided. Since it only needs to be formed, it can be processed easily.

Since the oil supply passage 40 has an annular shape, it is easy to form the holes (36, 37) communicating with the oil supply passage 40 from any position in the center housing 1. The upper communication hole 37 is opened on the inner peripheral surface of the suction port 25. The suction port 25 has a higher flow velocity of the suction refrigerant gas than that of the suction chamber 24 portion, and a suction action of the lubricating oil by the Venturi effect can be expected. Therefore, as compared with the case where the upper communication hole 37 is opened in the suction chamber 24, the ability to pump up the lubricating oil is improved.

[0039]

[Other Embodiment] Another embodiment of the present invention will be described below. Only the differences from the first embodiment will be described.

(Second Embodiment) As shown in FIG. 4, in this embodiment, the O-ring accommodating groove 42 as a seal groove is O-shaped.
The ring 6 is formed wider than the ring 6 and also serves as the annular groove 41. The O-ring 6 is the O-ring receiving groove 4
It is accommodated and arranged on the outer peripheral side of 2. Further, the upper and lower communication holes 36, 37 are communicated with each other on the inner peripheral side of the O-ring accommodating groove 42. (If the O-ring 6 is arranged on the inner peripheral side, the outer peripheral side of the O-ring 6 also has a high pressure. Side and does not serve as a seal).

As described above, in this embodiment, the O-ring accommodating groove 42 also serves as the annular groove 41, that is, the oil supply passage 40, so that the following effects are obtained. Grooving on the end surface 2α of the center housing 1 is required only once.

Since the O-ring accommodating groove 42 is opened wider than the width of the O-ring 6, it is easy to insert the O-ring 6 when the compressor is assembled. Generally, when inserting the O-ring 6 into the housing groove 42, oil is applied to the surface of the O-ring 6 in order to improve the sealing property. However, in the present embodiment, as a result, the O-ring 6 gets wet with the lubricating oil. Therefore, it is not necessary. Also, because the seal part is always filled with lubricating oil,
This will improve the sealing function.

Since the O-ring 6 is constantly subjected to the high pressure in the accommodating chamber 32, the O-ring 6 is prevented from deterioration. (Third Embodiment) In this embodiment, as shown in FIG.
The annular groove 41 and the lower communication hole 36 are connected so as to be offset from each other, and a part of the left end opening of the lower communication hole 36 is closed by the end surface 2α of the center housing 1. Therefore, the communicating portion between the annular groove 41 and the lower communication hole 36 is narrower than the inner diameter of the lower communication hole 36 to form the throttle 43.

In this embodiment, it is not necessary to use a separate diaphragm pin 38 as the diaphragm structure as in the first and second embodiments, which leads to a reduction in the number of parts. Further, since it is not necessary to form the lower communication hole 36 as a fine hole, its processing becomes easy.

The following embodiments can be carried out without departing from the spirit of the present invention. (1) As shown by the two-dot chain line in FIGS. 3 to 5, the oil supply passage 40 and the lubricating oil sump 35 are directly communicated with each other without the lower communication hole 36 (the arrow indicates the flow of the lubricating oil).
With this configuration, the structure of the oil supply structure is further simplified. (2) The scroll type compressor is embodied as a type that is not integrally provided with a motor unit (8, 11 etc.) for driving the rotating shaft 9 and is operated by receiving power from the outside. To do. (3) Embodying the present invention in a compressor other than the scroll compressor, for example, a reciprocating compressor such as a swash plate compressor. (4) Although the lubricating oil is mixed with the suction refrigerant gas in the above embodiment, the lubricating oil may be directly supplied from the oil supply passage 40 to each sliding portion. (5) In the third embodiment, the diaphragm (shift) 43 is formed on the upper communication hole side 37. By doing this, it is possible to pump up the lubricating oil to a predetermined height before squeezing it.
Smooth pumping of lubricating oil can be performed. (6) In the first or second embodiment, the throttle pin 38 is loosely fitted in the upper communication hole 37. By doing so, the same effect as (5) above can be obtained. (7) Provide an annular groove 41 on the motor housing 4 side. Alternatively, an annular groove 41 is provided in both housings 1 and 4,
The refueling passage 40 is configured by combining the openings. (8) The oil supply passage 40 is formed on the joint surface between the fixed scroll (rear housing) 7 and the center housing 1.
In this case, the lower communication hole penetrates the center housing 1, and the upper communication hole is formed on the opposite side in FIG.

The technical idea which can be understood from the above embodiment will be described. The housing member 1 used in a compressor in which an oil supply passage (40) is formed in a joint end surface 2α with the other housing 4. In this way, the oil supply passage 40 can be easily processed.

[0047]

According to the invention of claim 1 having the above-described structure, the oil supply passage can be formed with a simple structure, and the cost increase can be suppressed by the structure.

According to the second aspect of the present invention, it becomes easy to form a hole communicating with the oil supply passage from any position in the housing. According to the third aspect of the invention, it is not necessary to provide pores that are difficult to process in the oil supply passage.

According to the invention of claim 4, the number of parts can be reduced without the need for a separate diaphragm member. According to the invention of claim 5, the processing and assembling steps of the seal structure can be simplified, and the sealing function is improved.

According to the sixth aspect of the present invention, the pumping capacity of the lubricating oil is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a compressor.

FIG. 2 is a front view showing only a center housing.

FIG. 3 is an enlarged view showing a circle A in FIG.

FIG. 4 is an enlarged view of a main part of the second embodiment.

FIG. 5 is an enlarged view of a main part of the third embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Center housing which comprises a housing, 4 ... Motor housing which comprises a housing, 21 ... Compression chamber, 2
5 ... Suction port as low pressure part, 32 ... Storage chamber as high pressure part, 35 ... Lubricant oil reservoir, 40 ... Oil supply passage.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Kuroki 2-chome, Toyota-cho, Kariya city, Aichi Stock company Toyota Industries Corp.

Claims (6)

[Claims] 1. A low-pressure part through which suction gas passes, a compression chamber for compressing gas introduced through the low-pressure part, and a high-pressure part through which compressed gas passes are provided inside the housing, and a low pressure part is provided. Forming a lubrication passage communicating the high pressure portion with the high pressure portion, and based on the pressure difference between the low pressure portion and the high pressure portion, the lubricating oil retained in the inner bottom portion of the high pressure portion is supplied to the low pressure portion through the lubrication passage. In a compressor oil supply structure adapted to supply to a position, the housing includes a first housing and a second housing joined to the first housing, and the first housing or the second housing An oil supply structure for a compressor in which the oil supply passage is formed on at least one of the joint end faces along the extending direction of the joint. 2. The oil supply structure for a compressor according to claim 1, wherein the oil supply passage is formed in an annular shape along a joint portion between the first housing and the second housing. 3. The first or second housing includes:
The oil supply structure of the compressor according to claim 1 or 2, wherein a communication hole that connects the oil supply passage and the lubricating oil reservoir or the oil supply passage and the low pressure portion is formed, and a throttle member is inserted and arranged in the communication hole. . 4. The oil supply passage is formed in one housing, and the communication hole is formed in the other housing,
By shifting the connection position between the communication hole and the oil supply passage,
The oil supply structure for a compressor according to claim 1 or 2, wherein the portion forms a throttle. 5. A ring-shaped seal groove is formed on a joint surface between the first housing and the second housing, and a seal member for sealing the joint surface of both housings is housed in the seal groove. The oil supply structure for a compressor according to any one of claims 2 to 4, wherein the seal groove is formed wider than the seal width and also serves as the oil supply passage. 6. The oil supply structure for a compressor according to claim 1, wherein the oil supply passage is connected to an intake port for introducing gas from the outside.