JP2017172467A - Scroll-type compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll-type compressor capable of retaining the lubricity between a key part and a key groove even in the case where there is disposed a key part extending from the side face of an Oldham ring body.SOLUTION: A side key part 223 is fitted in a key groove immovable relative to a stationary scroll 19, and is reciprocally moved along a pair of key groove side faces in the key groove. The side key part 223 and opposed faces 193 jointing a pair of key groove side faces are formed with a lubrication clearance d5 capable of holding the lubrication oil without any scraping.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a scroll compressor.

  2. Description of the Related Art A scroll compressor that combines a fixed scroll and a movable scroll is known. In the fixed scroll, a spiral fixed side wrap is formed outward from the fixed center. In the movable scroll, a spiral movable side wrap is formed outward from the movable center, and the movable center revolves around the fixed center to form a compression mechanism. In such a scroll compressor, as described in Patent Document 1 below, an Oldham ring is used to prevent the rotation of the movable scroll.

JP 2003-172273 A

  The Oldham ring described in Patent Document 1 is erected on an Oldham ring main body, a first key portion extending outward from a side surface of the Oldham ring main body, and a main surface facing the movable scroll side of the Oldham ring main body. And a second key portion. Since the Oldham ring main body and the first key part form the same surface and only the second key part protrudes in a different direction, the molding process and the processing process can be simplified.

  By the way, in the Oldham ring described in Patent Document 1, the first key portion is inserted into the key groove in order to prevent the rotation of the movable scroll, and the first key portion receives the rotation force of the movable scroll and receives the rotation force of the movable scroll. Slide. In order to ensure reliability, it is necessary to ensure appropriate lubricity in the sliding portion between the first key portion and the key groove to suppress wear.

  However, in the form described in Patent Document 1, the first key portion slides while being in contact with both side surfaces and the bottom surface of the key groove, so that the lubricating oil hardly enters the sliding portion. Therefore, the lubricity at the sliding portion between the first key portion and the key groove is lowered, and there is a concern about wear of the first key portion and the key groove. When wear of the first key portion and the key groove progresses, the wear powder is difficult to be discharged from the sliding portion, and therefore, there is a concern that the wear powder may be caught. Further, the Oldham ring reciprocates when the movable wrap makes a revolving motion. In particular, during high speed operation, the inertial force increases, so that an inclination occurs, and only the tip of the first key portion may come into contact with the bottom surface of the key groove, and the lubricating oil may be scraped off.

  The present invention has been made in view of such problems, and its purpose is to ensure lubricity between the key portion and the key groove even when a key portion extending from the side surface of the Oldham ring main body is provided. An object of the present invention is to provide a scroll type compressor that can perform the above-described process.

  In order to solve the above problems, a scroll compressor 10 according to the present invention includes a fixed scroll (19) in which a spiral fixed side wrap (19a) is formed outward from a fixed center (C1). A movable scroll (18a) having a spiral shape is formed outwardly from the movable center (C2), and the movable scroll (18) constitutes a compression mechanism by revolving with respect to the fixed center. And an Oldham ring (22, 22A) that allows the revolving motion of the movable center while preventing the movable side wrap from rotating about the movable center. The Oldham ring is opposed to the Oldham ring main body (221, 221A), the side key portion (223, 223A) extending outward from the side surface of the Oldham ring main body, and the movable scroll side of the Oldham ring main body. And a standing key portion (222) that is erected on the forming surface (221n). The side key portion is inserted into a key groove (192) that does not move relative to the fixed scroll, and reciprocates along a pair of key groove side surfaces (194) in the key groove, A lubrication gap is provided between the side key portion and the opposing surface (193, 193A) connecting the side surfaces of the pair of key grooves.

  In the present invention, since a lubrication gap is provided between the side key portion and the opposing surface connecting the pair of key groove side surfaces, the side key portion extending from the side surface of the Oldham ring main body is provided. Also when provided, the lubricity between the side key portion and the key groove can be ensured.

  Reference numerals in parentheses described in “Means for Solving the Problems” and “Claims” indicate a correspondence relationship with “Mode for Carrying Out the Invention” described later, It does not indicate that the invention described in “Means for Solving the Problems” and “Claims” is limited to “Mode for Carrying Out the Invention” described later.

  ADVANTAGE OF THE INVENTION According to this invention, even when the key part extended from the side surface of an Oldham ring main body is provided, the scroll type compressor which can ensure the lubricity between a key part and a key groove can be provided.

FIG. 1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the revolution state of the movable scroll. FIG. 3 is a view for explaining the movement of the Oldham ring. FIG. 4 is a diagram for explaining the state of the key viewed from the direction A in FIG. FIG. 5 is a diagram for explaining the movement of the Oldham ring. FIG. 6 is a diagram for explaining the lubricating oil path. FIG. 7 is a diagram for explaining the lubricating oil path. FIG. 8 is a diagram for explaining another example of the lubricating oil path. FIG. 9 is a diagram for explaining the lubrication gap. FIG. 10 is a diagram for explaining another example for providing a lubrication gap. FIG. 11 is a diagram for explaining an example when the Oldham ring is vertically arranged. FIG. 12 is a diagram for explaining another example when the Oldham ring is vertically arranged.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A scroll compressor 10 shown in FIG. 1 uses carbon dioxide as a refrigerant, and supports a fixed scroll 19 and a movable scroll 18 constituting a compression mechanism in a cylindrical housing 11. A middle housing 12 that supports the main shaft 15 of the electric motor unit 13 is fitted into the housing 11 with a gap. The outer peripheral portion of the middle housing 12 and the housing 11 are spot welded by a spot weld portion 28.

  Both ends of the housing 11 are closed by an end wall 11a and an end wall 11b, respectively. An electric motor unit 13 is disposed inside the housing 11. The end wall 11 a is provided with a suction pipe 14 that sucks the refrigerant recirculated from the refrigerant circuit into the housing 11. That is, the scroll type compressor 10 is configured to take in the refrigerant into the housing 11 through the suction pipe 14 so that the inside of the housing 11 becomes a suction pressure atmosphere by operating a compression mechanism described later.

  The electric motor unit 13 includes a stator 13a and a rotor 13b. The stator 13 a is disposed on the inner wall of the housing 11. The rotor 13b is attached to the rotation main shaft 15 along the central axis that penetrates the space in the housing 11 surrounded by the stator 13a.

  One end of the rotation main shaft 15 is supported by the main bearing 17, and the other end is supported by penetrating the middle housing 12. The main bearing 17 is provided in the partition wall 16 near the end wall 11a. An eccentric portion 15 a that is eccentric with respect to the main shaft is provided on the other end side of the rotation main shaft 15. A movable scroll 18 is fixed to the eccentric portion 15a. A fixed scroll 19 is disposed so as to face the movable scroll 18.

  The movable scroll 18 has a substantially disk shape. The movable scroll 18 has a movable side wrap 18a and a boss portion 18b. The movable wrap 18a is erected in an involute curve shape from one surface toward the fixed scroll 19 side. The boss portion 18b is erected in a cylindrical shape from the other surface toward the middle housing 12 side. An eccentric portion 15a on the other end side of the rotation main shaft 15 is closely fitted to the boss portion 18b.

  On the other hand, the fixed scroll 19 has a fixed side wrap 19a formed by a spiral groove provided on one surface facing the movable scroll 18 side. By arranging the movable scroll 18 and the fixed scroll 19 to face each other, the working chamber 20 is formed.

  The middle housing 12 has a three-stage cylindrical shape having a diameter that gradually increases from the motor unit 13 side toward the fixed scroll 19 side. The cylinder 12 a having the smallest diameter close to the electric motor unit 13 is configured as a bearing that supports the main shaft 15. The middle cylinder 12b constitutes a space for accommodating a fitting portion between the eccentric portion 15a on the other end side of the rotary main shaft 15 and the boss portion 18b. The cylinder 12c having the largest diameter close to the fixed scroll 19 is provided with a thrust seat 21 in contact with the movable scroll 18 at the end face. On the outermost periphery of the fixed scroll 19, an outer peripheral edge portion 18 c that protrudes toward the cylinder 12 c is provided. The movable scroll 18 is surrounded by bringing the outer peripheral edge portion 18c and the cylinder 12c into close contact with each other.

  An Oldham ring 22 is arranged between the movable scroll 18 and the fixed scroll 19 as a rotation preventing means for preventing the rotation of the movable scroll 18 in the space for accommodating the movable scroll 18 formed by the outer peripheral edge portion 18c. ing. Only the revolution of the movable scroll 18 is allowed by the Oldham ring 22. A cylindrical seat 12c is provided with a thrust seat 21 in contact with the movable scroll 18 and a thrust bearing 23, which is a slide bearing, at the end face thereof.

  With the above configuration, the compression mechanism forms a plurality of working chambers 20 by meshing the movable side wrap 18a and the fixed side wrap 19a. As the movable scroll 18 turns with respect to the fixed scroll 19, the refrigerant supplied to the suction chamber (not shown) communicating with the outermost peripheral side of the fixed wrap 19a is compressed by reducing the volume of the working chamber 20. .

  A discharge port 24 that penetrates the fixed scroll 19 in the axial direction is provided at the center of the fixed side wrap 19a. The refrigerant compressed by the movable scroll 18 and the fixed scroll 19 is discharged from the discharge port 24 to the discharge chamber 25.

  The discharge chamber 25 has a sealed space at the center of the opposite side surface of the fixed scroll 19 in which the fixed side wrap 19a is formed. A discharge valve 26 is disposed in the discharge chamber 25. The discharge valve 26 closes the discharge port 24 to prevent the discharged refrigerant from flowing backward. A discharge pipe 27 is formed in the discharge chamber 25 so as to extend toward the outside of the housing 11.

  Next, the operation of the scroll compressor 10 will be described. When the electric motor unit 13 is started and the compression mechanism is operated, the inside of the housing 11 becomes an intake pressure atmosphere. The refrigerant recirculated from the refrigerant circuit is sucked into the housing 11 through the suction pipe 14 of the end wall 11a. The sucked refrigerant is supplied from the housing 11 to a suction chamber (not shown) communicating with the outermost peripheral side of the fixed side wrap 19a.

  The movable scroll 18 turns with respect to the fixed scroll 19 by the rotation of the rotary main shaft 15 of the electric motor unit 13. By this rotation, the volume of the working chamber 20 is reduced, and the refrigerant supplied to the suction chamber (not shown) communicating with the outermost peripheral side of the fixed wrap 19a can be compressed.

  The refrigerant compressed by the movable scroll 18 and the fixed scroll 19 is discharged from the discharge port 24 to the discharge chamber 25 through the discharge valve 26. The refrigerant passes through a discharge pipe 27 penetrating from the discharge chamber 25 toward the outside of the housing 11 and is supplied to the refrigerant circuit.

  Next, the movement of the Oldham ring 22 will be described. FIG. 2 shows the relationship between the fixed center C 1 of the fixed scroll 19 and the movable center C 2 of the movable scroll 18. The movable center C2 turns on the revolution track around the fixed center C1. 2A shows the zero displacement position of the Oldham ring 22, and FIG. 2B shows the maximum displacement position of the Oldham ring 22. FIG.

  FIG. 3 shows a state in which the Oldham ring 22 is at the zero displacement position. 3A schematically shows a state where the Oldham ring 22 is viewed from the side, and FIG. 3B schematically shows a state where the Oldham ring 22 is viewed in plan view.

  The Oldham ring 22 includes an Oldham ring main body 221, a pair of standing key portions 222, and a pair of side key portions 223. The Oldham ring body 221 has an annular shape. The Oldham ring main body 221 has a contact surface 221m and a forming surface 221n. The contact surface 221 m is formed so as to contact the support surface 191 of the fixed scroll 19. The formation surface 221n is formed to face the movable scroll 18 of the Oldham ring main body 221.

  The pair of standing key portions 222 are arranged on the diameter of the Oldham ring main body 221 so as to be shifted from each other by 180 degrees. The pair of side key portions 223 are also arranged on the diameter of the Oldham ring main body 221 so as to be shifted from each other by 180 degrees. The pair of upright key portions 222 and the pair of side key portions 223 are arranged so as to be shifted from each other by 90 degrees.

  The standing key part 222 is erected on the forming surface 221n. The side key part 223 is provided so as to extend outward from the side surface of the Oldham ring main body 221. The side key part 223 is inserted into a key groove 192 formed in the fixed scroll 19. The side key part 223 reciprocates along the pair of key groove side surfaces 194 and 194. The side key portion 223 has a fixed scroll support surface side surface 223m and a movable scroll side surface 223n.

  An opposing surface 193 is provided so as to connect the pair of keyway side surfaces 194 and 194. The opposing surface 193 is formed with a surface that is one step deeper so as to recede from the support surface 191 with respect to the Oldham ring 22. Accordingly, a step is formed between the support surface 191 and the facing surface 193.

  d1 indicates the depth of the region where the Oldham ring 22 is provided. d2 indicates the thickness of the Oldham ring main body 221. d3 indicates the thickness of the side key portion 223. d4 indicates the depth of the keyway 192. As shown in FIG. 3A and FIG. 4, a gap d <b> 6 is formed between the side key portion 223 and the middle housing 12. A gap d5 is formed between the side key portion 223 and the facing surface 193.

  When the movable center C2 revolves with respect to the fixed center C1 so as to go from (A) to (B) in FIG. 2, the Oldham ring 22 has a movement in which the side key portion 223 reciprocates in the key groove 192. The standing key unit 222 moves in combination with the reciprocating motion in the key groove 181 of the movable scroll 18. Therefore, the Oldham ring 22 does not rotate but only revolves. In the present embodiment, the revolution radius of the Oldham ring 22 is ε.

  FIG. 5 shows a state where the Oldham ring 22 is at the maximum displacement position. 5A schematically shows a state where the Oldham ring 22 is viewed from the side, and FIG. 5B schematically shows a state where the Oldham ring 22 is viewed in plan view. The maximum displacement position is a position where one side key part 223 enters the key groove 192 most and the other side key part 223 moves to a position farthest from the key groove 192.

At this maximum displacement position, the Oldham ring 22 is inclined by the inertial force applied to the Oldham ring 22 as shown in FIG. Since the tilt of the Oldham ring 22 is particularly noticeable during high-speed operation, conventionally, when the Oldham ring 22 is tilted in this way, the lubricating oil is scraped off or worn by the tip of the side key portion 223. There was a risk of biting the powder. Therefore, in the present embodiment, the gap d5 is formed in consideration of the Oldham ring inclination amount cb generated when the Oldham ring 22 is inclined. The gap d5 is provided so as to satisfy the following two expressions. As shown in FIG. 3, G is the outermost diameter of the Oldham ring 22, and H is the outermost support distance that supports the Oldham ring 22. θ is the maximum inclination angle of the Oldham ring 22.
Clearance d5> Oldham ring inclination cb
Oldham ring inclination cb = ((GH) / 2 + ε) · tan θ
By forming the gap d5 in this way, the lubricating oil can be retained without being scraped off. Further, the side key portion 223 is prevented from coming into contact with the facing surface 193 to prevent scraping of lubricating oil and biting of wear powder. The wear powder is discharged without being bitten. Accordingly, the gap d5 corresponds to the lubrication gap of the present invention.

  In the scroll compressor 10, the lubricating oil separated by the oil separator flows into the groove inner peripheral side of the fixed scroll 19 through each bearing. As shown in FIG. 6, the lubricating oil flows into the groove inner circumferential inner region 195 and flows out to the opposing surface 193 of the key groove 192. In this embodiment, the opposing surface 193 is extended until it hits the groove inner circumferential inner region 195.

  FIG. 7 shows an enlarged view around the side key portion 223 and the facing surface 193. As shown in FIG. 7, a recessed portion 223 a is provided in a connection portion of the side key portion 223 with respect to the Oldham ring main body 221. Therefore, the lubricating oil path F1 can be ensured even at the maximum displacement position as described with reference to FIG.

  The lubricating oil path F1 does not necessarily have to be secured at all points in time, and it is only necessary to supply the lubricating oil necessary for the lubricating gap. Moreover, the recessed part 223a does not necessarily need to be formed. As shown in FIG. 8, an extended facing surface 193 a may be provided in a region where the facing surface 193 is applied to the groove inner circumferential inner region 195. The extended facing surface 193a is provided so as to expand the facing surface 193 in the groove inner circumferential inner region 195. The extended facing surface 193a can secure the lubricating oil path F1 even when the side key portion 223 is at the maximum displacement position. In the example shown in FIG. 8, the extended facing surface 193a is formed only in the vicinity of the key groove 192, but a step may be provided over the entire circumference.

  As shown in FIG. 9, the lubrication gap indicated by the hatched portion is based on the distance d7 between the fixed scroll support surface side surface 223 m of the side key portion 223 and the opposing surface 193, and the contact surface 221 m and the support surface 191 opposed thereto. The minimum gap d8 is subtracted. The lubrication gap indicated by the hatched portion corresponds to the gap d5 described above, and is defined as a value at which the tip of the side key portion 223 does not interfere with the facing surface 193 even when the Oldham ring 22 is inclined during operation. In the scroll type compressor 10 having the vertical arrangement as in the present embodiment, the lubricating oil flows downward and accumulates, and therefore the gap formed below is important.

  In the above-described embodiment, the lubrication gap is formed by retreating the facing surface 193 with respect to the support surface 191, but the formation mode of the lubrication gap is not limited thereto. An Oldham ring 22A as shown in FIG. 10 is also a preferred embodiment. The Oldham ring 22A has an Oldham ring main body 221A and a side key portion 223A. The standing key part is not shown. The fixed scroll support surface side surface 223Aa of the side key portion 223A is formed so as to retreat with respect to the contact surface 221Aa of the Oldham ring main body 221A. Accordingly, the fixed scroll support surface side surface 223Aa is separated from the support surface 191A that supports the contact surface 221Aa. In the case of this example, the support surface 191A and the opposing surface 193A are formed as the same plane, but the fixed gap support surface side surface 223Aa is formed to recede so that a lubrication gap is formed.

  As described above, when the Oldham rings 22 and 22A are arranged so as to intersect with the lubricating oil dropping direction, the lubricating oil flows from the upper side to the lower side in the figure, so that the lubricating gap is lower than the Oldham rings 22 and 22A. It is preferable to be provided.

  On the other hand, as shown in FIG. 11, when the Oldham ring 22 is vertically arranged, the Oldham ring 22 is arranged along the lubricating oil dropping direction. Therefore, it is preferable to form both the opposing surfaces 193 sandwiching the Oldham ring 22 backward so that the lubrication gap sandwiches the Oldham ring 22.

  However, as shown in FIG. 12, when it can be clearly understood that the external force F acts on the Oldham ring 22, it is preferable to form one opposing surface 193 backward. In this case, the lubrication gap is formed on the side opposite to the side where the external force F acts.

  As described above, the scroll compressor 10 according to this embodiment includes the fixed scroll 19 in which the spiral fixed side wrap 19a is formed outward from the fixed center C1 and the movable center C2 outward. While the spiral movable side wrap 18a is formed and the movable center C2 revolves with respect to the fixed center C1, the movable scroll 18 constituting the compression mechanism and the revolving motion of the movable center C2 are allowed, Oldham rings 22 and 22A for preventing the movable side wrap 18a from rotating about the movable center C2 are provided. The Oldham rings 22, 22A include Oldham ring bodies 221, 221A, side key portions 223, 223A extending outward from the side surfaces of the Oldham ring bodies 221, 221A, and the movable scroll 18 side of the Oldham ring bodies 221, 221A. And a standing key portion 222 that is erected on a forming surface 221n that faces the surface. The side key portions 223 and 223 </ b> A are inserted into a key groove 192 that does not move relative to the fixed scroll 19, and reciprocate along a pair of key groove side surfaces 194 and 194 in the key groove 192. Between the side key portions 223 and 223A and the opposing surfaces 193 and 193A connecting the pair of key groove side surfaces 194 and 194, a lubrication gap that can hold the lubricating oil without scraping is provided. More specifically, between the fixed scroll support surface side surface 223m of the side key portion 223 and the facing surface 193, between the fixed scroll support surface side surface 223Aa of the side key portion 223A and the facing surface 193A, the side key portion. Lubrication gaps are provided between the movable scroll side surface 223n of 223 and the facing surface 193 formed on the middle housing 12 so that the lubricating oil can be held without being scraped off.

  In the present embodiment, as described above, the lubrication gap that can be held without scraping the lubricating oil is provided, so when the side key portions 223 and 223A extending from the side surfaces of the Oldham ring main bodies 221 and 221A are provided. In addition, the lubricity between the side key portions 223, 223A and the key groove 192 can be ensured.

  Further, in the present embodiment, the lubrication gap is formed between the Oldham ring main body 221 and 221A and the Oldham ring main body 221 and 221A from the gap between the fixed scroll support surface side surfaces 223m and 223Aa or the movable scroll side surface 223n and the opposing surfaces 193 and 193A. The minimum gap between the supporting surfaces 191 and 191A formed so as to be supported is subtracted.

  In this embodiment, a pair of opposing surfaces 193 and 193A are provided with the side key portions 223 and 223A sandwiched therebetween, and the fixed scroll support surface side surfaces 223m and 223Aa or the movable scroll side surface 223n and the pair of opposing surfaces 193 and 193A. The value obtained by subtracting the distance of the minimum gap from the distance between at least one of these is a positive value.

  In the present embodiment, as described with reference to FIGS. 7 and 8, the lubricating oil path F1 is provided so that the lubricating oil supplied to the support surfaces 191 and 191A flows into the lubricating gap. Since the lubricating gap is provided so that the lubricating oil can be held without being scraped off, and the lubricating oil path F1 is provided so that the lubricating oil flows into the lubricating gap, the lubricating oil can be continuously replenished without being cut off.

  Further, in the present embodiment, the lubricating oil path F1 is supplied with the lubricating oil to the opposing surfaces 193 and 193A during at least a part of the period during which the side key portions 223 and 223A reciprocate with respect to the key groove 192. It is formed as follows. From the viewpoint of substantially ensuring the lubricity, it is not always necessary to ensure the lubricating oil path F1, and there may be a period in which the lubricating oil path F1 is not secured within a range that does not impair the lubricity. Absent.

  In the present embodiment, the lubricating oil path F1 can be formed by a receding surface in which at least a part of the outer peripheral portion of the support surface 191 has receded to the facing surface 193 side. As described with reference to FIGS. 7 and 8, when the lubricating oil flows into the groove inner peripheral area 195 of the support surface 191, the lubricating oil flows out to the opposite surface 193 side of the key groove 192 through the receding surface. .

  Further, as described with reference to FIGS. 7 and 8, the receding surface and the facing surface 193 can be provided so as to form the same plane. By forming them as the same plane, the processing process becomes easy.

  In addition, as described with reference to FIG. 10, the lubricating oil path includes at least one of the Oldham ring main body 221A or the side key portion 223A with respect to the contact surface 221Aa where the Oldham ring main body 221A contacts the support surface 191A. It can also be formed by retreating the part.

  Further, as described with reference to FIG. 7, the lubricating oil path can also be formed by providing the concave portion 223 a in the connection portion of the side key portion 223 with respect to the Oldham ring main body 221. By providing the recess 223a, the lubricating oil can be supplied more reliably.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present invention as long as they have the features of the present invention. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

  For example, in the above-described embodiment, an example in which the Oldham ring 22 is arranged between the fixed scroll 19 and the movable scroll 19 has been described as an example, but the arrangement mode of the Oldham ring 22 is not limited thereto. For example, the Oldham ring 22 can be disposed between the middle housing 12 and the movable scroll 19.

10: Scroll compressor 18: Movable scroll 19: Fixed scroll 22, 22A: Oldham ring 191, 191A: Support surface 192: Key groove 193, 193A: Opposing surface 194: Key groove side surface 221, 221A: Oldham ring main body 221m: Contact surface 221n: Forming surface 222 Standing key portions 223, 223A: Side key portion 223a: Recess C1: Fixed center C2: Moving center F1: Lubricating oil path

Claims (8)

A scroll compressor (10),
A fixed scroll (19) in which a spiral fixed side wrap (19a) is formed outward from the fixed center (C1);
A movable scroll (18a) having a spiral shape is formed outward from the movable center (C2), and the movable center revolves with respect to the fixed center. ,
An Oldham ring (22, 22A) that allows the revolving motion of the movable center while preventing the movable side wrap from rotating about the movable center,
The Oldham ring is opposed to the Oldham ring main body (221, 221A), the side key portion (223, 223A) extending outward from the side surface of the Oldham ring main body, and the movable scroll side of the Oldham ring main body. A standing key portion (222) that is erected on the forming surface (221n) to be formed,
The side key portion is inserted into a key groove (192) that does not move relative to the fixed scroll, and reciprocates along a pair of key groove side surfaces (194) in the key groove,
A scroll compressor, wherein a lubrication gap is provided between the side key portion and an opposing surface (193, 193A) connecting the side surfaces of the pair of key grooves.   The lubrication gap is formed between a gap between the side key portion and the facing surface between the Oldham ring main body and a support surface (191, 191A) formed so as to support the Oldham ring main body. The scroll type compressor according to claim 1, wherein the minimum gap is subtracted. A pair of the opposing surfaces is provided across the side key portion,
A value obtained by subtracting the distance of the minimum gap from the distance between the side key portion and at least one of the pair of opposed surfaces is set to be a positive value even when the Oldham ring is inclined. The scroll compressor according to claim 2.   The scroll compressor according to claim 2 or 3, wherein a lubricating oil path (F1) is provided so that the lubricating oil supplied to the support surface flows into the lubricating gap.   5. The scroll compressor according to claim 4, wherein the lubricating oil path is formed by a receding surface in which at least a part of an outer peripheral portion of the support surface recedes toward the facing surface.   The scroll compressor according to claim 5, wherein the receding surface and the facing surface are provided so as to form the same plane.   The lubricating oil path includes at least part of the Oldham ring main body or the side key portion (223A) with respect to a contact surface (221Aa) on which the Oldham ring main body (221A) contacts the support surface (191A). The scroll compressor according to any one of claims 4 to 6, wherein at least a part of the compressor is formed by retreating to a side opposite to the support surface.   The said lubricating oil path | route is formed by providing a recessed part (223a) in the connection part of the said side key part (223) with respect to the said Oldham ring main body (221). Scroll compressor.

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