JP2009287399A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make lubricating oil easily flow to a central part in the vertical direction of an eccentric part, without largely reducing rigidity in the eccentric part. <P>SOLUTION: A side surface of the eccentric part 81 includes an opening 91a of an oil feeding passage 91 formed in a substantially central part in its vertical direction, and is formed with an oil feeding groove 92 extending over the whole area of the eccentric part 81 in the vertical direction. The oil feeding groove 92 has a deep groove part 92a and a shallow grove part 92b. The deep groove part 92a forms the substantially central part in the vertical direction of the oil feeding groove 92, and the lubricating oil flowing out to the side surface of the eccentric part from the oil feeding passage 91, flows in the deep groove part 92a. The oil feeding groove 92 becomes the deepest (a depth D1) in the deep groove part 92a. The shallow groove part 92b forms upper and lower parts of the deep groove part 92a of the oil feeding groove 92, and its depth D2 is shallower than the depth D1 of the deep groove part 92a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a compressor that compresses a refrigerant.

  In the compressor described in Patent Document 1, the crankshaft eccentric portion extends from the crankshaft oil supply passage (first oil passage) extending in the vertical direction in the crankshaft (shaft) to the side surface of the crankshaft eccentric portion. A shaft horizontal hole (second oil supply passage) is formed, and a crankshaft oil groove (oil supply groove) extending in the vertical direction is formed in a portion including the opening of the crankshaft horizontal hole on the side surface of the crankshaft eccentric portion. ing. Then, oil (lubricating oil) in the crankshaft oil supply passage is supplied from the crankshaft lateral hole to the side surface of the crankshaft eccentric portion, and further flows through the crankshaft oil groove and spreads over the entire side surface of the crankshaft eccentric portion. As a result, sliding between the crank eccentric portion and the roller becomes smooth, and seizure is prevented from occurring between the two.

JP 7-259767 A

  Here, in the compressor described in Patent Document 1, the lubricating oil supplied to the crankshaft eccentric portion is most difficult to flow in the central portion in the vertical direction. It is necessary to deepen the oil groove to some extent and store the oil in the crankshaft oil supply groove. However, if the entire crankshaft oil supply groove is deepened, the rigidity of the crankshaft eccentric portion in the portion where the groove is formed is greatly reduced, and as a result, there is a risk that the deflection of the crankshaft during rotation will increase. There is.

  An object of the present invention is to provide a compressor that can sufficiently distribute lubricating oil over the entire side surface of the eccentric portion without greatly reducing the rigidity of the eccentric portion.

  A compressor according to a first aspect of the present invention is disposed in a sealed space, and has a cylinder in which a cylinder chamber for compressing a refrigerant is formed, and vertically penetrates the cylinder chamber. A shaft provided with an eccentric portion that is eccentric with respect to the rotation axis in a corresponding portion, and disposed inside the cylinder chamber, and the eccentric portion is located inside the shaft chamber. And a roller that moves along the inner peripheral surface of the cylinder chamber. The shaft extends in the vertical direction inside the shaft, and a first oil supply passage through which lubricating oil flows, and the eccentricity. A second oil supply that extends from the first oil supply path to the side surface of the eccentric part inside the part, and that flows in the side surface of the eccentric part, and that flows through the side surface of the eccentric part. Road and said A portion including the opening of the second oil supply passage on the side surface of the center portion extends over the entire vertical direction of the eccentric portion, and an oil supply groove whose depth is deepest in the vicinity of the center portion is formed. It is characterized by being.

  In this compressor, since the depth of the oil supply groove is deepest in the vicinity of the central portion, the lubricating oil is likely to accumulate in the portion where the depth of the oil supply groove is deep, and the substantially central portion in the vertical direction of the side surface of the eccentric portion. Since the depth of the oil supply groove is shallow at the upper and lower ends of the eccentric part where the lubricating oil can flow relatively easily, the rigidity of the eccentric part due to the oil supply groove is reduced. It can be suppressed.

  A compressor according to a second invention is the compressor according to the first invention, wherein the opening in the side surface of the eccentric portion of the second oil supply passage is located at a central portion in the vertical direction of the side surface of the eccentric portion. It is characterized by that.

  In this compressor, since the lubricating oil is directly supplied to the deepest portion of the oil supply groove, the lubricating oil is more likely to accumulate near the center of the oil supply groove.

  A compressor according to a third aspect of the present invention is the compressor according to the first or second aspect of the present invention, wherein the oil supply groove is a multi-stage groove whose depth becomes deeper in the central part in the vertical direction. It is characterized by that.

  In this compressor, since the oil supply groove is a multi-stage groove, the lubricating oil is surely collected near the center of the oil supply groove having the deepest depth. Lubricating oil easily flows to the part.

  A compressor according to a fourth aspect of the present invention is the compressor according to the first or second aspect of the present invention, wherein the oil supply groove is a tapered groove whose depth becomes deeper at the center in the vertical direction. It is characterized by that.

  In this compressor, an oil supply groove having a deepest depth in the vicinity of the central portion can be formed by forming the oil supply groove into a tapered groove having a deeper depth in the central portion in the vertical direction.

  A compressor according to a fifth invention is the compressor according to any one of the first to fourth inventions, wherein the oil supply groove is a length in the circumferential direction of the side surface of the eccentric part in the central part in the vertical direction. Is the longest.

  In this compressor, since the length of the oil supply groove in the circumferential direction of the eccentric portion side surface is the longest in the central portion of the eccentric portion in the vertical direction, the lubricating oil easily flows to the central portion in the vertical direction of the side surface of the eccentric portion. . In addition, since the length of the oil supply groove in the circumferential direction is shortened at the upper end portion and the lower end portion of the side surface of the eccentric portion where the lubricating oil is relatively easy to flow, a decrease in rigidity of the eccentric portion due to the oil supply groove is suppressed.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, since the depth of the oil supply groove is deepest in the vicinity of the central portion, the lubricating oil is likely to collect in the portion where the depth of the oil supply groove is deep, and the approximate center in the vertical direction of the side surface of the eccentric portion The lubrication oil can flow sufficiently through the part, and the depth of the oil supply groove is shallow at the upper and lower ends of the side of the eccentric part where the lubricant can flow relatively easily. Is suppressed.

  In the second invention, since the lubricating oil is directly supplied to the deepest portion of the oil supply groove, the lubricating oil is more likely to accumulate near the center of the oil supply groove.

  In the third aspect of the invention, since the oil supply groove is a multi-stage groove, the lubricating oil is surely collected in the vicinity of the center of the oil supply groove having the deepest depth. Lubricating oil easily flows in the center.

  In 4th invention, the oil supply groove | channel where the depth becomes the deepest in the center part vicinity can be formed by making the oil supply groove into the taper-shaped groove | channel where the depth is so deep that the center part regarding an up-down direction.

  In the fifth aspect of the invention, since the length of the oil supply groove with respect to the circumferential direction of the eccentric portion side surface is the longest in the central portion of the eccentric portion in the vertical direction, the lubricating oil flows into the central portion in the vertical direction of the side surface of the eccentric portion Cheap. In addition, since the length of the oil supply groove in the circumferential direction is shortened at the upper end portion and the lower end portion of the side surface of the eccentric portion where the lubricating oil is relatively easy to flow, a decrease in rigidity of the eccentric portion due to the oil supply groove is suppressed.

  Hereinafter, preferred embodiments of the present invention will be described.

  FIG. 1 is a schematic configuration diagram of a compressor according to the present embodiment. FIG. 2 is an enlarged view of the vicinity of the eccentric portion of FIG. 3A is a cross-sectional view taken along line III-III in FIG. 2, and FIG. 3B is a partially enlarged view of FIG. 3A. 4 is a cross-sectional view taken along line IV-IV in FIG. The compressor 1 is, for example, a compressor incorporated in a refrigeration cycle (not shown) such as an air conditioner. The compressor 1 compresses a refrigerant from which moisture is removed and is disposed at an upper end portion thereof. The compressed refrigerant is discharged from the discharge pipe 25. As shown in FIGS. 1 to 4, the compressor 1 includes a casing 11, a motor 12, and a compression mechanism 13.

  The casing 11 includes a body 21, a top 22 and a bottom 23. The trunk | drum 21 is a substantially cylindrical member extended in the up-down direction, The upper and lower ends are opening. Further, a suction pipe 24 for introducing the refrigerant from the refrigeration cycle is formed on the side surface of the body 21 at the lower right end in the figure. The top 22 is a member that closes the opening at the upper end of the body 21. The top 22 is provided with the above-described discharge pipe 25. The bottom 23 is a member that closes the opening at the lower end of the body 21. In the casing 11, a sealed space 26 surrounded by the body 21, the top 22, and the bottom 23 is formed.

  The motor 12 is disposed in the sealed space 26 and has a stator 31 and a rotor 32. The stator 31 is fixed to the inner wall surface of the body 21. The rotor 32 is disposed on the radially inner side of the stator 31, and an upper end portion of a shaft 80 extending in the vertical direction is fixed to a substantially central portion thereof. In the motor 12, the rotor 32 rotates together with the shaft 80 by the magnetic force generated between the stator 31 and the rotor 32. Note that the configurations of the stator 31 and the rotor 32 are the same as those of a conventional motor, and thus detailed description thereof is omitted here.

  The compression mechanism 13 is located below the motor 12 in the sealed space 26. The compression mechanism 13 is a so-called oscillating piston type compression mechanism having a piston in which a later-described roller 42 and a blade (not shown) are integrally formed, and as shown in FIG. 1, a cylinder 41 and a roller 42 (piston). A front head 43 and a rear head 44. The shaft 80 described above extends downward from the motor 12 and penetrates the cylinder 41, the roller 42, the front head 43 and the rear head 44. The compression mechanism 13 is not limited to the above-described form, and may be a so-called two-cylinder type compression mechanism having two cylinders or a two-stage compression type. Further, the compression mechanism 13 is not limited to one in which the roller 42 and the blade are integrated, and may be a rotary type compression mechanism in which these are separated.

  The cylinder 41 is fixed to the body 21 by, for example, shrinkage, and a substantially circular cylinder chamber 71 is formed in a substantially central portion of the cylinder 41 in a plan view that penetrates the cylinder 41 in the vertical direction.

  Further, the cylinder 41 is connected to the cylinder chamber 71, and an introduction passage 72 extending from the cylinder chamber 71 to the right in FIG. 1 is formed. The suction pipe 24 is connected to the introduction passage 72. . Thereby, the refrigerant introduced into the compressor 1 flows into the cylinder chamber 71 via the introduction flow path 72.

  The roller 42 has a substantially circular planar shape and is disposed inside the cylinder chamber 71. A substantially circular through hole 42a is formed at a substantially central portion of the roller 42, and an eccentric portion 81 (described later) of the shaft 80 is fitted into the through hole 42a. As the shaft 80 rotates together with the eccentric portion 81, the roller 42 moves along the wall surface of the cylinder chamber 71, whereby the refrigerant in the cylinder chamber 71 is compressed. The compressed refrigerant is discharged from the cylinder chamber 71 to the sealed space 26 via a discharge passage (not shown). In addition, since the process in which the refrigerant | coolant in the cylinder chamber 71 is compressed by the roller 42 moving is the same as that of the conventional compressor, the detailed description is abbreviate | omitted here.

  The front head 43 is joined to the upper surface of the cylinder 41 and closes the opening on the upper surface of the cylinder chamber 71. The rear head 44 is joined to the lower surface of the cylinder 41 and closes the opening on the lower surface of the cylinder chamber 71.

  Next, the shaft 80 will be described in detail. As described above, the upper end of the shaft 80 is fixed to the rotor 32, and extends in the vertical direction to penetrate the front head 43, the cylinder 41, the roller 42, and the rear head 44. The shaft 80 is formed with an oil supply passage 80a (first oil supply passage) having a substantially circular plane shape extending in the vertical direction at the substantially central portion thereof. The oil supply passage 80a is formed at the lower end of the sealed space 26. Lubricating oil for smoothing the operation of the compressor 1 is supplied from the oil reservoir 15 provided.

  Further, the shaft 80 has an eccentric portion 81 whose central axis is eccentric with respect to the rotation axis of the shaft 80 at a portion (a portion corresponding to the cylinder chamber 71) located at the same height as the cylinder 41 and the roller 42. Is provided. The eccentric portion 81 is fitted in the through hole 42a of the roller 42 as described above.

  An oil supply passage 91 (second oil supply passage) and an oil supply groove 92 are formed in the eccentric portion 81. The oil supply passage 91 extends in the horizontal direction from the oil supply passage 80a to the side surface of the eccentric portion 81, and is open at a substantially central portion in the vertical direction of the side surface of the eccentric portion 81 (having an opening 91a). Thereby, the lubricating oil flowing through the oil supply passage 80 a is supplied to the side surface of the eccentric portion 81 through the oil supply passage 91. An oil film is formed between the eccentric portion 81 and the roller 42 by the lubricating oil supplied to the side surface of the eccentric portion 81, and seizure occurs between the eccentric portion 81 and the roller 42 due to this oil film. Is prevented.

  The oil supply groove 92 is formed in the part including the opening 91 a of the oil supply passage 91 on the side surface of the eccentric portion 81 over the entire area in the vertical direction. The oil supply groove 92 has a deep groove portion 92a and a shallow groove portion 92b.

  The deep groove portion 92 a forms a substantially central portion in the vertical direction of the oil supply groove 92 including the opening of the oil supply passage 91, and has the deepest depth (depth D 1), and the side surface of the eccentric portion 81. The length in the circumferential direction is the maximum (length L1).

  The shallow groove portion 92b forms a portion above the deep groove portion 92a and a portion below the deep groove portion 92a of the oil supply groove 92, and the depth D2 is shallower than the depth D1 of the deep groove portion 92a. . The shallow groove portion 92b has a length L2 in the circumferential direction of the side surface of the eccentric portion 81 that is shorter than a length L1 in the direction of the deep groove portion 92a.

  Since such an oil supply groove 92 is formed on the side surface of the eccentric portion 81, the lubricating oil flowing out from the oil supply passage 91 to the side surface of the eccentric portion 81 flows into the deep groove portion 92a and from the deep groove portion 92a to the eccentric portion 81. It flows in a substantially central part in the up-down direction of the side surface. Further, the lubricating oil flows from the deep groove portion 92a into the shallow groove portion 92b, and flows from the shallow groove portion 92b to the upper and lower ends of the side surface of the eccentric portion 81.

  Here, since the lubricating oil that has flowed out from the oil supply passage 91 to the side surface of the eccentric portion 81 is most difficult to flow to the substantially central portion in the vertical direction of the side surface of the eccentric portion 81, the lubricating oil is spread over the entire side surface of the eccentric portion 81. In order to achieve this, the depth of the oil supply groove provided on the side surface of the eccentric portion 81 needs to be increased to some extent, and the lubricating oil needs to be sufficiently stored in the oil supply groove.

  However, unlike the present embodiment, if the depth of the oil supply groove is increased over the entire region, the rigidity of the eccentric portion 81 is lowered at the portion where the oil supply groove is formed, and the deflection of the shaft 80 is increased. There is a risk of it.

  On the other hand, in the present embodiment, the central portion in the vertical direction of the oil supply groove 92 is the deep groove portion 92a, and the depth thereof is the deepest, so that the lubricating oil tends to accumulate in the deep groove portion 92a. The lubricating oil is easy to flow in the substantially central portion of the side surface of the eccentric portion 81 in the vertical direction.

  On the other hand, at the upper and lower ends of the eccentric portion 81 where lubricating oil flows relatively easily, the oil supply groove 92 is a shallow groove portion 92b, so that a decrease in rigidity of the eccentric portion 81 is suppressed. It is prevented that the deflection becomes large.

  Further, since the oil supply groove 92 is a two-stage groove composed of the deep groove portion 92a and the shallow groove portion 92b, the lubricating oil is surely accumulated in the deep groove portion 92a. Lubricating oil flows more easily in the center.

  Further, the opening of the oil supply passage 91 is located at a substantially central portion in the vertical direction of the side surface of the eccentric portion 81, and the lubricating oil supplied from the oil supply passage 91 to the oil supply groove 92 flows directly into the deep groove portion 92a. Therefore, the lubricating oil is more likely to accumulate in the deep groove portion 92a.

  In addition, since the length L1 in the circumferential direction of the side surface of the eccentric portion 81 of the deep groove portion 92a is longer than the length L2 in the direction of the shallow groove portion 92b, the lubricating oil in the deep groove portion 92a is removed from the eccentric portion 81. It tends to flow to the approximate center of the side surface in the vertical direction. On the other hand, since the length L2 in the circumferential direction of the side surface of the eccentric portion 81 of the shallow groove portion 92b formed on the upper and lower ends of the side surface of the eccentric portion 81 where lubricating oil is relatively easy to flow, the rigidity of the eccentric portion 81 is reduced. Is suppressed from decreasing.

  As described above, in the compressor 1 according to the present invention, the oil supply groove 92 is a two-stage groove including the deep groove portion 92a having a deep depth and the shallow groove portion 92b shallower than the deep groove portion 92a. Thus, the lubricating oil is surely accumulated in the deep groove portion 92a, and the lubricating oil easily flows to the substantially central portion in the vertical direction of the side surface of the eccentric portion 81.

  Further, the opening 91a of the oil supply passage 91 is located at a substantially central portion in the vertical direction of the side surface of the eccentric portion 81, and the lubricating oil supplied from the oil supply passage 91 to the oil supply groove 92 is directly applied to the deep groove portion 92a. Since it flows in, the lubricating oil is more likely to accumulate in the deep groove portion 92a.

  In addition, since the length L1 in the circumferential direction of the side surface of the eccentric portion 81 of the deep groove portion 92a is longer than the length L2 in the direction of the shallow groove portion 92b, the lubricating oil in the deep groove portion 92a is removed from the eccentric portion 81. It tends to flow to the approximate center of the side surface in the vertical direction. On the other hand, since the length L2 in the circumferential direction of the side surface of the eccentric portion 81 of the shallow groove portion 92b formed on the upper and lower ends of the side surface of the eccentric portion 81 where lubricating oil is relatively easy to flow, the rigidity of the eccentric portion 81 is reduced. Is suppressed from decreasing.

  As mentioned above, although embodiment of this invention was described based on drawing, specific structure is not restricted to these embodiment, It can change in the range which does not deviate from the summary of invention.

  In the above-described embodiment, the oil supply groove 92 is a two-stage groove including the deep groove portion 92a and the shallow groove portion 92b, but is not limited thereto. In one modification, as shown in FIG. 5, the oil supply groove 101 formed on the side surface of the eccentric portion 81 is configured by three groove portions 101 a to 101 c. The groove portion 101a forms a substantially central portion in the vertical direction of the oil supply groove 101, and the depth thereof is the deepest (depth D3). The groove part 101b forms the part adjacent to the upper and lower sides of the groove part 101a of the oil supply groove 101, and the depth D4 is shallower than the depth D3 of the groove part 101a. The groove portion 101c forms a portion adjacent to the outside of the groove portion 101b of the oil supply groove 101 in the vertical direction, and the depth D5 is shallower than the depth D4 of the groove portion 101b. That is, the oil supply groove 101 composed of the groove portions 101a to 101c is a three-stage groove whose depth is deeper in the central portion in the vertical direction (Modification 1).

  In this case, the lubricating oil that has flowed out from the oil supply passage 91 to the side surface of the eccentric portion 81 flows into the groove portion 101a, and further flows from the groove portion 101a into the groove portions 101b and 101c. Further, the lubricating oil that has flowed into the groove portions 101 a to 101 c flows to each portion on the side surface of the eccentric portion 81.

  Even in this case, since the oil supply groove 101 is deepest in the groove portion 101a formed at a substantially central portion in the vertical direction, the lubricating oil is most likely to accumulate in the groove portion 101a, whereby the vertical direction of the side surface of the eccentric portion 81 is increased. Lubricating oil flows sufficiently into the approximate center.

  Furthermore, since the groove portions 101b and 101c are shallower than the groove portion 101a, a decrease in the rigidity of the eccentric portion 81 is suppressed and the deflection of the shaft 80 is prevented from increasing.

  In addition, the oil supply groove is not limited to the two-stage groove as in the above-described embodiment and the three-stage groove as in the first modified example, and has four or more stages that are deeper at a substantially central portion in the vertical direction. It may be a groove.

  In the above-described embodiment, in the oil supply groove 92, the length L1 in the circumferential direction of the side surface of the eccentric portion 81 of the deep groove portion 92a is longer than the length L2 in the direction of the shallow groove portion 92b. This is not a limitation. In another modification, as shown in FIG. 6, the length along the circumferential direction of the side surface of the eccentric part 81 of the deep groove part 111a and the shallow groove part 111b in the oil supply groove 111 is substantially the same (Modification Example 2). ).

  Even in this case, since the depth of the deep groove portion 111a is deeper than the depth of the shallow groove portion 111b, the lubricating oil supplied from the oil supply passage 91 tends to accumulate in the deep groove portion 111a. Lubricating oil can easily flow into the approximate center in the vertical direction.

  Further, in the above-described embodiment, the opening 91a of the oil supply passage 91 is located at a substantially central portion in the vertical direction of the side surface of the eccentric portion 81, but is not limited thereto. In another modification, as shown in FIG. 7, the opening 121 a of the oil supply passage 121 (second oil supply passage) is located near the upper end of the side surface of the eccentric portion 81, and the eccentric portion 81 extends from the oil supply passage 121. The lubricating oil that flows out to the side faces flows into the upper shallow groove portion 122b (Modification 3).

  Also in this case, the lubricating oil that has flowed into the shallow groove portion 122b flows into the deep groove portion 122a from the shallow groove portion 122b, and the deep groove portion 122a is deeper than the shallow groove portion 122b. As a result, the lubricating oil easily flows into the substantially central portion of the eccentric portion 81 in the vertical direction.

  In Modification 3, the opening 121a of the oil supply passage 121 is located near the upper end of the side surface of the eccentric portion 81, but the opening of the second oil supply passage is located at another portion of the side surface of the eccentric portion 81. You may do it.

  Moreover, in the above-mentioned embodiment and the modifications 1-3, although the oil supply groove | channel became the groove | channel of several steps, it is not restricted to this. In another modification, as shown in FIG. 8, the oil supply groove 131 formed on the side surface of the eccentric portion 81 is a tapered groove whose depth becomes deeper at the center in the vertical direction (deformation). Example 4).

  Even in this case, the lubricating oil that has flowed from the oil supply passage 91 into the oil supply groove 131 is likely to accumulate in the substantially central portion in the vertical direction of the oil supply groove 131 that is deepest, and thus in the substantially central portion in the vertical direction of the eccentric portion 81. Lubricating oil is easy to flow.

  Further, the shape of the oil supply groove is not limited to the multi-stage groove and the taper-shaped groove as described above, and may be other shapes as long as the substantially central portion in the vertical direction is deepest. Also good.

  In the above-described embodiment, the length L1 of the deep groove portion 92a and the length L2 of the shallow groove portion 92b in the circumferential direction of the side surface of the eccentric portion 81 are constant, but the present invention is not limited to this. In another modification, as shown in FIG. 9, the right side surface of the deep groove portion 141 a and the shallow groove portion 141 b in the oil supply groove 141 is inclined with respect to the vertical direction, and the circumferential direction of the side surface of the eccentric portion 81 is The lengths of the deep groove portion 141a and the shallow groove portion 141b are longer at the central portion in the vertical direction (the longest in the central portion in the vertical direction) (Modification 5).

  Even in this case, since the length in the circumferential direction of the side surface of the eccentric portion 81 in the oil supply groove 141 is longer in the central portion in the vertical direction, the lubricating oil is applied to the side surface of the eccentric portion 81 as in the above-described embodiment. It becomes easy to flow to the central part in the vertical direction. Further, in the upper and lower end portions of the eccentric portion 81 where the lubricating oil flows relatively easily, the length of the side surface of the eccentric portion 81 of the oil supply groove 141 in the circumferential direction is shortened, so that a decrease in rigidity of the eccentric portion 81 is suppressed. be able to.

  If this invention is utilized, while it can fully flow lubricating oil to the approximate center part regarding the up-down direction of an eccentric part side surface, the fall of the rigidity of the eccentric part by an oil supply groove | channel is suppressed.

It is a schematic block diagram of the compressor which concerns on embodiment in this invention. It is an enlarged view of the eccentric part vicinity of FIG. (A) is the III-III sectional view taken on the line of FIG. 2, (b) is the elements on larger scale of (a). It is the IV-IV sectional view taken on the line of FIG. FIG. 6 is a view corresponding to FIG. 4 of Modification 1; FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG. FIG. 10 is a diagram corresponding to FIG.

Explanation of symbols

26 Sealed space 41 Cylinder 42 Roller 71 Cylinder chamber 80 Shaft 80a Oil supply path 81 Eccentric part 91 Oil supply path 91a Opening 92 Oil supply groove 101 Oil supply groove 111 Oil supply groove 121 Oil supply path 121a Opening 122 Oil supply groove 131 Oil supply groove 141 Oil supply groove

Claims (5)

A cylinder (41) disposed in the sealed space (26) and having a cylinder chamber (71) for compressing the refrigerant;
A shaft (80) penetrating the cylinder chamber (71) in the vertical direction, and provided with an eccentric portion (81) eccentric to the rotation axis in a portion corresponding to the cylinder chamber (71);
The eccentric portion (81) is located inside the cylinder chamber (71), and the inner peripheral surface of the cylinder chamber (71) as the shaft (80) rotates. And a roller (42) moving along
The shaft (80) includes
A first oil supply passage (80a) extending in the vertical direction inside the shaft (80) and through which lubricating oil flows;
Inside the eccentric part (81), the first oil supply path (80a) extends from the first oil supply path (80a) to the side surface of the eccentric part (81) and is open on the side surface of the eccentric part (81). A second oil supply passage (91, 121) for flowing the lubricating oil in 80a) to the side surface of the eccentric portion (81);
A portion of the side surface of the eccentric portion (81) including the opening (91a, 121a) of the second oil supply passage (91, 121) extends across the entire vertical direction of the eccentric portion (81), and An oil supply groove (92, 101, 111, 122, 131, 141) having the deepest depth is formed in the vicinity of the portion.   The opening (91a) in the side surface of the eccentric portion (81) of the second oil supply passage (91) is located in a central portion in the vertical direction of the side surface of the eccentric portion (81). The compressor (1) according to 1.   The said oil supply groove | channel (92, 101, 111, 122, 141) is a multistage groove | channel where the depth becomes so deep that the center part regarding an up-down direction is characterized by the above-mentioned. Compressor (1).   3. The compressor (1) according to claim 1, wherein the oil supply groove (131) is a taper-shaped groove whose depth becomes deeper in a central portion in the vertical direction.   The said oil supply groove | channel (92,122,141) is the center part regarding an up-down direction, and the length regarding the circumferential direction of the said eccentric part (81) is the longest. A compressor (1) according to crab.

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