JP2013217300A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor capable of supplying oil-containing fluid to a bearing of an eccentric part while suppressing deterioration of compression efficiency.SOLUTION: A scroll compressor is provided with an engagement part 4 forming an engagement chamber 4A into which an eccentric part 52 is inserted, and engaged with the eccentric part 52 via a bearing 93. An orbiting scroll 3 includes: a through-hole 311 which is formed on an orbiting side bottom plate 31 and makes an operation chamber 3A communicate with the engagement chamber 4A; and a wear-resistant plate 33 which is arranged on a surface of the orbiting side bottom plate 31 to cover the through-hole 311. The wear-resistant plate 33 has a processed part 331 in which irregularities is formed by means of shot processing on a surface 33a facing a surface of the orbiting side bottom plate 31. The processed part 331 is extended from an edge part 33b of the wear-resistant plate 33, facing at least a lateral surface 32a of an orbiting side wrap 32, to a portion facing the through-hole 311 of the wear-resistant plate 33.

Description

  The present invention relates to a scroll compressor.

  The scroll compressor is a device that compresses the fluid in the working chamber when the fixed scroll and the orbiting scroll form a working chamber for fluid and the orbiting scroll rotates. A scroll compressor is described in, for example, Japanese Patent Application Laid-Open No. 2011-174453 (Patent Document 1). The fluid to be compressed contains oil (lubricating oil). The fluid flows into the working chamber, and part of the fluid flows from the vicinity of the working chamber inlet (suction port) or from the outer periphery of the working chamber to the back side of the orbiting scroll, and each bearing, pin, and fixed in the scroll compressor. Lubricate between the scroll and the orbiting scroll.

  In the scroll compressor of Patent Document 1, an oil return passage is formed in the orbiting scroll so as to communicate the working chamber inlet side and the orbiting scroll rear side, and the lubrication portion on the orbiting scroll rear side can be lubricated. As described above, the scroll compressor has a structure in which a part of the fluid containing oil flows from the outer peripheral side of the working chamber or the vicinity of the inlet to the back side of the orbiting scroll.

JP 2011-174453 A

  Here, the orbiting scroll is being fixed to the eccentric part provided in shafts, such as a motor which is a drive source. The orbiting scroll and the eccentric portion are fixed by inserting the eccentric portion into an engagement chamber provided on the rear surface of the orbiting scroll and via a drive bearing. The engagement chamber is located at the center of the rear surface of the orbiting scroll and is formed so that an eccentric portion can be inserted therein. Therefore, the engagement chamber has a concave shape (so-called bag path) in which fluid does not easily flow into the interior. Therefore, it has been difficult to sufficiently lubricate the engagement chamber with a mechanism that allows fluid to flow from the vicinity of the working chamber inlet located on the outer peripheral side of the orbiting scroll to the rear side of the orbiting scroll as in the prior art. Further, the flow of fluid from the working chamber to the back side of the orbiting scroll can be a factor of reducing the compression efficiency.

  The present invention has been made in view of such circumstances, and is a scroll compression capable of supplying an oil-containing fluid to a bearing in an engagement chamber in which an eccentric portion is accommodated while suppressing a decrease in compression efficiency. The purpose is to provide a machine.

  The invention according to claim 1 is a fixed scroll having a fixed-side bottom plate, a fixed-side wrap formed in a spiral shape and standing on the surface of the fixed-side bottom plate, and the surface on the surface of the fixed-side bottom plate. An orbiting scroll having an orbiting-side bottom plate disposed oppositely, an orbiting scroll formed in a spiral shape and erected on the surface of the orbiting-side bottom plate, and an eccentric portion connected to the orbiting scroll, A shaft that rotates upon receiving a driving force, and an engagement portion that is provided integrally with the back surface of the turning-side bottom plate, forms an engagement chamber into which the eccentric portion is inserted, and engages with the eccentric portion via a bearing. A scroll that compresses the oil-containing fluid in the working chamber when the fixed scroll and the orbiting scroll constitute a fluid working chamber, and the orbiting scroll orbits with respect to the fixed scroll. The orbiting scroll is arranged on the surface of the orbiting bottom plate so as to cover the through hole and the through hole formed in the orbiting side bottom plate to communicate the working chamber and the engagement chamber. A wear-resistant plate, and the wear-resistant plate has a processed portion formed with irregularities by shot processing on a surface facing the surface of the swivel-side bottom plate, and the processed portion is at least It extends from an edge portion of the wear-resistant plate facing the side surface of the turning side wrap to a portion facing the through hole of the wear-resistant plate.

  According to a second aspect of the present invention, in the first aspect, the processed portion is formed on the entire surface of the turning-side bottom plate.

  According to a third aspect of the present invention, in the first aspect, the processing portion is formed on a part of the surface of the turning-side bottom plate and from an edge portion of the wear-resistant plate facing a side surface of the turning-side wrap. The wear-resistant plate extends to a portion facing the through hole.

  According to a fourth aspect of the present invention, in one of the first to third aspects, the processed portion has a surface roughness of 5 Rz or more and 15 Rz or less.

  According to a fifth aspect of the present invention, there is provided a fixed scroll having a fixed-side bottom plate and a fixed-side wrap formed in a spiral shape on the surface of the fixed-side bottom plate, and the surface on the surface of the fixed-side bottom plate. An orbiting scroll having an orbiting-side bottom plate disposed oppositely, an orbiting scroll formed in a spiral shape and erected on the surface of the orbiting-side bottom plate, and an eccentric portion connected to the orbiting scroll, A shaft that rotates upon receiving a driving force, and an engagement portion that is provided integrally with the back surface of the turning-side bottom plate, forms an engagement chamber into which the eccentric portion is inserted, and engages with the eccentric portion via a bearing. A scroll that compresses the oil-containing fluid in the working chamber when the fixed scroll and the orbiting scroll constitute a fluid working chamber, and the orbiting scroll orbits with respect to the fixed scroll. The orbiting scroll is arranged on the surface of the orbiting bottom plate so as to cover the through hole and the through hole formed in the orbiting side bottom plate to communicate the working chamber and the engagement chamber. A wear-resistant plate, and the side surface of the swivel-side wrap and the through hole communicate with the surface of the swivel-side bottom plate or the surface of the wear-resistant plate facing the surface of the swivel-side bottom plate. Grooves are formed.

  A sixth aspect of the present invention is that in the fifth aspect, the groove is formed on a surface of the turning-side bottom plate.

  According to the first aspect of the present invention, the oil-containing fluid flows into the center of the working chamber while being compressed, and part of the inflowed fluid enters between the wear-resistant plate and the swivel-side bottom plate, The through hole is reached through the unevenness. The fluid flows into the engagement chamber through the through hole, and lubricates the eccentric bearing disposed in the engagement chamber. In addition, the through hole is covered with a wear-resistant plate and communicates with the working chamber only through the gap and the processed portion, so that a larger amount of fluid than necessary is prevented from flowing out to the engagement chamber, and compression is achieved. The decrease in efficiency is suppressed. Thus, according to the present invention, the oil-containing fluid can be supplied to the bearings in the engagement chamber while suppressing a decrease in compression efficiency.

  According to the second aspect of the present invention, since it is only necessary to execute the shot processing on the entire surface of the wear-resistant plate, the wear-resistant plate can be easily manufactured.

  According to the third aspect of the present invention, since the processing portion is provided on a part of the surface of the wear-resistant plate, the other flat portion suppresses the wear of the surface of the processing portion and the turning-side bottom plate, and the wear-resistant plate and the turning While suppressing deterioration of a side bottom board, the flow path to a through-hole can be ensured more reliably.

  According to the fourth aspect of the present invention, the flow path of the fluid is more reliably ensured when the surface roughness of the processed portion is 5 Rz or more, and the surface roughness of the processed portion is 15 Rz or less. Unnecessary outflow is suppressed, and deterioration of the wear-resistant plate is suppressed.

  According to the fifth aspect of the present invention, the oil-containing fluid enters between the wear-resistant plate and the swivel bottom plate and reaches the working chamber through the groove and the through hole. In addition, since the through hole is covered with the wear-resistant plate and communicates with the working chamber only through the gap and the processed portion, it is possible to prevent an excessive amount of fluid from flowing out to the engagement chamber side. The reduction in compression efficiency is suppressed. Thus, according to the present invention, the oil-containing fluid can be supplied to the bearings in the engagement chamber while suppressing a decrease in compression efficiency.

  According to the sixth aspect of the present invention, it is only necessary to form a groove on the surface of the swivel-side bottom plate, which is easier to process than a wear-resistant plate that is generally formed of a hard material and is thin, and suppresses an increase in manufacturing cost. can do.

It is sectional drawing which shows the structure of the scroll compressor of 1st embodiment. It is a partial expanded sectional view which shows the abrasion-resistant board of 1st embodiment. It is a conceptual diagram which shows the surface of the abrasion-resistant board of 2nd embodiment. It is a conceptual diagram which shows the surface of the turning side baseplate of 3rd embodiment. It is a partial expanded sectional view which shows the turning side baseplate of 3rd embodiment. It is sectional drawing for demonstrating a some through-hole.

  Next, the present invention will be described in more detail with reference to embodiments. In the embodiment, a scroll compressor provided in a gas heat pump type air conditioner is illustrated. In addition, drawing is a conceptual diagram and does not prescribe | regulate an exact dimension. Further, the same configurations in the respective embodiments will be described with the same reference numerals.

<First embodiment>
As shown in FIG. 1, the scroll compressor according to the first embodiment mainly includes a front housing 11, a rear housing 12, a fixed scroll 2, a turning scroll 3, an engaging portion 4, a shaft 5, It has. The front housing 11 and the rear housing 12 form an internal space of the scroll compressor, and accommodate the fixed scroll 2, the orbiting scroll 3, the engaging portion 4, and the shaft 5. The shaft 5 is inserted into the front housing 11 via a bearing 91.

  The rear housing 12 is fixed to the front housing 11. An outer peripheral portion of the rear housing 12 is provided with a suction port 121 that allows fluid to flow into the interior and a discharge port 122 that ejects fluid inside. The rear housing 12 forms a discharge chamber 12A between the rear housing 12 and a fixed-side bottom plate 21 described later.

  The fixed scroll 2 includes a fixed-side bottom plate 21, a fixed-side wrap 22, and a wear-resistant plate 23. The fixed-side bottom plate 21 is a disc-shaped end plate and constitutes the bottom plate of the fixed scroll 2. The fixed-side bottom plate 21 is fixed to the rear housing 12. A discharge hole 211 is formed substantially at the center of the fixed-side bottom plate 21. The discharge hole 211 is a through-hole that allows a working chamber 3A and a discharge chamber 12A described later to communicate with each other.

  The fixed side wrap 22 is a spiral plate member, and is erected on a surface (hereinafter referred to as a surface) 21 a on the front housing 11 side of the fixed side bottom plate 21. The wear-resistant plate 23 is a plate member that is disposed on the surface 21a of the fixed-side bottom plate 21 and suppresses wear due to friction between the orbiting scroll 3 and the surface 21a. The wear-resistant plate 23 covers the surface 21 a excluding the fixed side wrap 22 installation portion. A through hole 231 is formed in a portion corresponding to the discharge hole 211 of the wear resistant plate 23.

  The orbiting scroll 3 has substantially the same shape as the fixed scroll 2 and includes an orbiting side bottom plate 31, an orbiting side wrap 32, and a wear resistant plate 33. The turning-side bottom plate 31 is a disc-shaped end plate and constitutes the bottom plate of the turning scroll 2. The surface 31 a of the turning-side bottom plate 31 faces the surface 21 a of the fixed-side bottom plate 21. The turning-side bottom plate 31 is engaged with the front housing 11 by a ball coupling 92 so as to be able to turn (revolve) and suppress rotation.

  Further, a plurality of through holes 311 penetrating from the front surface 31 a side to the back surface 31 b side are formed in a substantially central portion of the turning-side bottom plate 31. In other words, the turning-side bottom plate 31 has a cylindrical through-hole forming portion 311a that forms the through-hole 311 at a substantially central portion. The through-hole 311 communicates a region (a working chamber 3A described later) on the surface 31a side of the turning-side bottom plate 31 with an engaging chamber 4A described later.

  The turning side wrap 32 is a spiral plate member, and is erected on a surface (hereinafter referred to as a surface) 31 a of the turning side bottom plate 31 on the rear housing 12 side. The tip of the turning side wrap 32 is in contact with the wear resistant plate 23 of the fixed scroll 2. When the orbiting scroll 3 orbits with respect to the fixed scroll 2, the tip of the orbiting side wrap 32 slides on the wear resistant plate 23.

  The wear-resistant plate 33 is a plate member that is disposed on the surface 31a of the turning-side bottom plate 31 and suppresses wear due to friction between the distal end portion of the fixed-side wrap 22 and the surface 31a. The wear-resistant plate 33 covers the surface 31a excluding the portion where the turning side wrap 32 is installed. That is, the through hole 311 is covered with the wear resistant plate 33. In general, the wear-resistant plates 23 and 33 are made of a material harder than the bottom plates 21 and 31 and are thinly formed. Details of the wear-resistant plate 33 will be described later.

  Here, the turning side wrap 32 is meshed with the fixed side wrap 22 while shifting the angle. The turning wrap 32 and the wear-resistant plate 23 are in contact with each other, and the fixed-side wrap 22 and the wear-resistant plate 33 are in contact with each other, thereby being surrounded by the turning-side bottom plate 31, the fixed-side bottom plate 21, the turning-side wrap 32, and the fixed-side wrap 22. A working chamber 3 </ b> A that is a substantially airtight space is formed between the fixed scroll 2 and the orbiting scroll 3. Thus, the fixed scroll 2 and the orbiting scroll 3 constitute a working chamber 3A into which fluid flows.

  The engaging portion 4 is formed integrally with the turning-side bottom plate 31 in the approximate center of the back surface 31 b of the turning-side bottom plate 31. The engaging portion 4 protrudes in a cylindrical shape from the back surface 31b of the turning-side bottom plate 31 and forms an engaging chamber 4A into which an eccentric portion 52 described later is inserted.

  The shaft 5 is a transmission member that rotates with a driving force received from one end side and transmits the driving force to the other end side. Specifically, the shaft 5 includes a drive shaft portion 51 and an eccentric portion 52. The drive shaft portion 51 is a cylindrical shaft member, and is rotatably inserted into the front housing 11 via a bearing 91. A drive source device (engine, motor, etc.) is connected to one end side of the drive shaft portion 51, and a disc-shaped crank member 511 is integrated with the other end side (rear housing 12 side) of the drive shaft portion 51. Is formed. In addition, since the scroll compressor of this embodiment is used for a gas heat pump type air conditioner, the drive source connected to the shaft 5 is a gas engine. The driving source of the scroll compressor may be an engine of an engine-driven air conditioner that uses an engine that uses liquid fuel such as kerosene or gasoline as a driving source.

  The eccentric part 52 is a columnar member formed integrally with the crank member 511 of the drive shaft part 51. The eccentric part 52 is provided at a position eccentric from the center of the drive shaft part 51, and is composed of a crankpin and an eccentric bush (not shown). The eccentric part 52 is rotatably inserted into the drive bearing 93. The drive bearing 93 is fixed (press-fit) to the engagement chamber 4 </ b> A in the engagement portion 4. That is, the eccentric portion 52 is inserted into the engagement chamber 4 </ b> A via the drive bearing 93. Thus, the orbiting scroll 3 and the eccentric portion 52 are engaged via the drive bearing 93 and the engaging portion 4.

  Here, the wear resistant plate 33 of the orbiting scroll 3 will be further described. As shown in FIG. 2, the wear-resistant plate 33 has a processed portion 331 in which irregularities are formed by shot processing on a surface 33 a facing the surface 31 a of the turning-side bottom plate 31. In the present embodiment, the processed portion 331 is provided on the entire surface 33 a of the wear-resistant plate 33. That is, the entire surface 33a of the wear-resistant plate 33 is shot processed. Thus, the processing part 331 is formed on the entire surface 33a. The surface roughness of the processed part 331 in this embodiment is 5Rz or more and 15Rz or less.

  Here, the operation and effects of the scroll compressor of the present embodiment will be described. The eccentric part 52 rotates when the driving force from the driving source is transmitted from the driving shaft part 51. As the eccentric shaft 52 rotates, the orbiting scroll 3 whose rotation is prevented by the ball coupling 92 orbits with respect to the fixed scroll 2. A fluid (refrigerant gas) containing mist-like oil flows into the housings 11 and 12 from the suction port 121 by the orbiting motion of the orbiting scroll 3. The fluid is taken into the inside from the outer peripheral end of the working chamber 3A. The working chamber 3A smoothly reduces its volume as the fluid moves inward due to the turning motion. Therefore, the fluid flowing into the working chamber 3A is compressed as it moves, and is discharged into the discharge chamber 12A by pushing the discharge valve 212 from the discharge hole 211 near the center. Then, the compressed fluid is sent from the discharge port 122 to the external path of the scroll compressor. The discharge port 122 is provided with an oil separator (not shown), and the oil is removed from the discharged fluid by the oil separator.

  On the other hand, a part of the fluid flowing into the housings 11 and 12 from the suction port 121 passes through the ball coupling 92 and is also sent to each sliding portion where a bearing or the like is disposed. Thereby, each sliding part is lubricated. However, the fluid that has flowed from the vicinity of the outer peripheral end of the working chamber 3A to the back surface 31b side of the turning-side bottom plate 31 is unlikely to flow into the engagement chamber 4A that is a bag path.

  Here, in this embodiment, the orbiting scroll 3 has a through hole 311 and a wear-resistant plate 33. Since the processed portion 331 is provided on the entire surface 33 a of the wear-resistant plate 33, it extends at least from the edge portion 33 b of the wear-resistant plate 33 to a portion facing the through hole 311. The vicinity of the center of the working chamber 3A is in a high pressure state, and the engagement chamber 4A is in a low pressure state.

  For this reason, the compressed fluid that has flowed into the center of the working chamber 3A wraps around the surface 33a through a slight gap between the edge 33b of the wear-resistant plate 33 and the side surface 32a of the swivel wrap 32, and between the surface 31a and the surface 33a. The slight gap and the recessed portion of the processed portion 331 flow. The slight gap is, for example, a gap of about an oil film, for example, a gap of several tens of μm. The processing portion 331 enlarges the passage area by the concave and convex portions with respect to the gap between the surface 31a of the turning-side bottom plate 31 and the wear-resistant plate 33a, which has only an oil film. The gap between the surface 31 a of the turning-side bottom plate 31 and the wear-resistant plate 33 a can be brought into a closer contact state with the turning of the turning scroll 3.

  The passage formed by the concave portion of the processed portion 331 communicates the through hole 311 and the edge portion 33b together with the gap. The fluid containing oil flows into the center while being compressed in the working chamber 3 </ b> A, and a part of the inflow reaches the through hole 311 through the processing portion 331. The fluid flows into the engagement chamber 4A through the through hole 311 and lubricates the drive bearing 93 disposed in the engagement chamber 4A.

  In the present embodiment, the through hole 311 is not directly connected to the working chamber 3 </ b> A via the recessed portion of the processing portion 331. Thereby, it is suppressed that the fluid in the working chamber 3A flows out more than necessary to the back surface 31b side of the swivel-side bottom plate 31, and a decrease in fluid circulation efficiency and compression efficiency is suppressed. Thus, according to the scroll compressor of this embodiment, it is possible to supply the oil-containing fluid to the drive bearing 93 in the engagement chamber 4A while suppressing a decrease in compression efficiency. Further, in the present embodiment, since the shot processing may be performed on the entire surface 33a of the wear resistant plate 33, the wear resistant plate 33 can be easily manufactured.

  Further, when the surface roughness of the processed portion 331 is 5 Rz or more, a fluid flow path is more reliably ensured, and when the surface roughness of the processed portion 331 is 15 Rz or less, the flow of fluid more than necessary is suppressed. And the functional fall of the abrasion-resistant board 33 is suppressed.

<Second embodiment>
The scroll compressor of the second embodiment is different from the first embodiment in that a processed portion 331 is formed on a part of the surface 33a of the wear-resistant plate 33 of the orbiting scroll 3. Therefore, only different parts will be described.

  As shown in FIG. 3, the processed portion 331 extends from the edge portion 33 b of the surface 33 a of the wear-resistant plate 33 to a portion 33 c facing the through hole 311. The portion other than the processing portion 331 on the surface 33a is a planar non-processing portion 332 that is not subjected to shot processing. The processing part 331 extends in a groove shape having a predetermined width from the through hole 311 facing part 33c to the edge part 33b. The processed portion 331 of the second embodiment can be formed by, for example, performing a shot process using a mask on the surface 33a. The masked portion becomes a flat portion (non-processed portion) 332 that is not subjected to shot processing.

  Also in the second embodiment, the fluid that wraps around from the edge portion 33 b of the wear-resistant plate 33 flows into the through hole 311 through the processing portion 331. The fluid flows into the engagement chamber 4A through the through hole 311 and lubricates the drive bearing 93. Thus, the same effect as the first embodiment is exhibited in the second embodiment.

  Furthermore, in the second embodiment, since the periphery of the processing portion 331 is a planar processing portion, the unevenness of the processing portion 331 is less likely to be worn compared to the processing portion 331 that is entirely on the surface 33a, and the fluid The passage can be secured more reliably. The flow path is maintained for a longer period. Moreover, it is suppressed that the unevenness | corrugation of the process part 331 contact | abuts to the turning side bottom plate 31 directly, and the fall of the wear suppression effect with respect to the turning side bottom plate 31 of the wear-resistant board 33 can also be suppressed.

  In the first embodiment and the second embodiment, the surface roughness of the processed portion 331 is preferably 5 Rz or more from the viewpoint of easy passage of fluid. Furthermore, the surface roughness of the processed portion 331 is preferably 15 Rz or less from the viewpoint of the difficulty of fluid leakage (compression efficiency) and the function of the wear resistant plate 33.

<Third embodiment>
The scroll compressor of the third embodiment is different from the first embodiment in that shot processing is not performed on the shape of the surface of the turning-side bottom plate and the surface of the wear-resistant plate. Therefore, the turning-side bottom plate will be mainly described.

  As shown in FIGS. 4 and 5, the turning-side bottom plate 31 of the third embodiment has a concave groove 312 on the surface 31a. The groove 312 extends from the through hole 311 to the side surface 32 a of the turning side wrap 32. The groove 312 allows the through hole 311 and the working chamber 3A to communicate with each other through a slight gap between the side surface 32a of the turning side wrap 32 and the edge 33b of the wear resistant plate 33. It can be said that the turning-side bottom plate 31 has a groove forming portion 312a that forms a groove 312 on the surface 31a.

  A plurality of grooves 312 extend from one through hole 311. In the present embodiment, four grooves 312 are formed at intervals of about 90 degrees from one through hole 311. Further, the groove 312 of the present embodiment is formed so that the shape of the cross section orthogonal to the extending direction (flow channel cross section) is a semicircular shape. Here, the radius of the semicircle of the groove 312 is about 0.1 mm.

  According to the scroll compressor of the third embodiment, the fluid that has flowed up to the center of the working chamber 3A flows from the edge 33b of the wear-resistant plate 33 toward the surface 33a, and flows into the through hole 311 through the groove 312. The fluid flows into the engagement chamber 4A through the through hole 311 and lubricates the drive bearing 93. Thus, according to the third embodiment, the same effect as the first embodiment is exhibited. Moreover, since it is not necessary to provide unevenness in the wear-resistant plate 33, the wear-inhibiting action of the wear-resistant plate 33 is maintained.

  Further, the groove may be formed on the surface 33 a of the wear-resistant plate 33. In this case, the groove only needs to extend from the edge 33 b of the wear-resistant plate 33 to a position 33 c facing the through hole 311. This also exhibits the same effect as described above. However, it is easier to form the groove 312 in the turning-side bottom plate 31 than to process the wear-resistant plate 33, and an increase in manufacturing cost can be suppressed.

<Others>
The present invention is not limited to the above embodiment. For example, the drive source connected to the shaft 5 is not limited to the engine but may be an electric motor such as a motor. Further, at least one through hole 311 is sufficient, but it is effective if there are a plurality of through holes 311 as shown in the above embodiment and FIG. Moreover, you may combine 1st embodiment and 3rd embodiment, 2nd embodiment, and 3rd embodiment suitably.

2: fixed scroll, 21: fixed side bottom plate, 22: fixed side wrap,
3: orbiting scroll, 31: orbiting side bottom plate, 311: through hole, 312: groove,
32: Turning side wrap, 33: Wear-resistant plate, 331: Processing part, 3A: Working chamber,
4: engagement portion, 4A: engagement chamber,
5: Shaft 51: Drive shaft part 52: Eccentric part
93: Drive bearing (bearing)

Claims (6)

A fixed scroll having a fixed-side bottom plate, and a fixed-side wrap formed in a spiral shape on the surface of the fixed-side bottom plate;
A orbiting scroll having a revolving side bottom plate whose surface is disposed to face the surface of the fixed side bottom plate, and a revolving side wrap formed in a spiral shape and erected on the surface of the revolving side bottom plate;
A shaft that has an eccentric portion connected to the orbiting scroll and rotates upon receiving a driving force;
An engagement portion that is integrally provided on the back surface of the turning-side bottom plate, forms an engagement chamber into which the eccentric portion is inserted, and engages with the eccentric portion via a bearing;
The fixed scroll and the orbiting scroll constitute a fluid working chamber, and the orbiting scroll rotates relative to the fixed scroll to compress the oil-containing fluid in the working chamber,
The orbiting scroll has a through hole formed in the orbiting side bottom plate to allow the working chamber and the engagement chamber to communicate with each other, and an abrasion resistant plate disposed on the surface of the orbiting side bottom plate so as to cover the through hole. With
The wear-resistant plate has a processed portion in which irregularities are formed by shot processing on a surface facing the surface of the turning-side bottom plate,
The said process part is a scroll compressor extended from the edge part of the said abrasion-resistant board facing the side surface of the said turning side wrap at least to the site | part facing the said through-hole of the said abrasion-resistant board. In claim 1,
The said process part is a scroll compressor currently formed in the whole surface of the said turning side bottom board. In claim 1,
The processing portion is formed on a part of the surface of the turning-side bottom plate, from an edge portion of the wear-resistant plate facing the side surface of the turning-side wrap to a portion facing the through hole of the wear-resistant plate. Extending scroll compressor. In one of Claims 1-3,
The scroll compressor whose surface roughness of the processed part is 5Rz or more and 15Rz or less. A fixed scroll having a fixed-side bottom plate, and a fixed-side wrap formed in a spiral shape on the surface of the fixed-side bottom plate;
A orbiting scroll having a revolving side bottom plate whose surface is disposed to face the surface of the fixed side bottom plate, and a revolving side wrap formed in a spiral shape and erected on the surface of the revolving side bottom plate;
A shaft that has an eccentric portion connected to the orbiting scroll and rotates upon receiving a driving force;
An engagement portion that is integrally provided on the back surface of the turning-side bottom plate, forms an engagement chamber into which the eccentric portion is inserted, and engages with the eccentric portion via a bearing;
The fixed scroll and the orbiting scroll constitute a fluid working chamber, and the orbiting scroll rotates relative to the fixed scroll to compress the oil-containing fluid in the working chamber,
The orbiting scroll has a through hole formed in the orbiting side bottom plate to allow the working chamber and the engagement chamber to communicate with each other, and an abrasion resistant plate disposed on the surface of the orbiting side bottom plate so as to cover the through hole. With
The scroll compressor by which the groove | channel which connects the side surface of the said turning side lap and the said through-hole is formed in the surface of the said turning side bottom plate, or the surface of the said abrasion-resistant board facing the surface of the said turning side bottom plate. In claim 5,
The said groove | channel is a scroll compressor currently formed in the surface of the said turning side bottom board.

Images