JP3348487B2 - Compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor in which a casing includes a compression element, a drive shaft for driving the compression element, and a housing having a bearing for supporting the drive shaft.

[0002]

2. Description of the Related Art Conventionally, a compressor in which a compression element is housed in a casing and a bearing housing of a drive shaft for driving the compression element is housed is disclosed in Japanese Patent Application Laid-Open No. 3-105091. The drive shaft is supported on a bearing portion of the bearing housing via a bearing metal. The compressor described in this publication is a vertical compressor, and a fixed scroll A is provided on one side of a housing H including an upper member H1 and a lower member H2 above the inside of a casing C as shown in FIG.
And the movable scroll B, and the lower member H
2 supports a drive shaft D extending from a motor M disposed below the inside of the casing C via a bearing H3 provided on the movable scroll B, and a pin portion D1 provided at an upper shaft end of the drive shaft D. A transmission mechanism having a so-called inner drive structure, in which the movable scroll B is rotated with respect to the fixed scroll A by rotation of the drive shaft D, is fitted to the bearing H4 provided on the cylindrical boss B1. Things.

In order to make each sliding portion of the bearings H3 and H4 perform a smooth sliding operation, the drive shaft D
A fuel supply passage D2 extending from a bottom oil reservoir is provided inside the oil supply passage, and an upper portion of the oil supply passage D2 is opened to an end face of the pin portion D1, so that a bearing portion H4 between the pin portion D1 and the boss portion B1 is provided.
And the drive shaft D is provided with an oil hole D3 communicating with the oil supply passage D2, and the oil hole D3 is connected to the drive shaft D
The oil is supplied to the bearing portion H3 that supports the drive shaft D by opening the outer peripheral surface of the shaft.

[0004]

By the way, in the lubricating structure for the bearing portion H3 constructed as described above, the lubricating structure is supported by the bearing portion H3 in order to achieve better lubrication in the bearing portion H3. As shown in FIG. 14, an oil groove D3 extending in the axial direction and having one end open to the inside of the casing C is provided on the outer peripheral surface of the shaft portion of the drive shaft D. The oil supplied from the oil supply passage D2 to the oil groove D3 is communicated with an oil supply passage D2 provided on the shaft D, and the oil supplied from the oil supply passage D2 to the inner peripheral surface of the bearing H3, more specifically, a bearing metal fitted to the bearing H3. The oil film is formed on the entire outer peripheral surface of the shaft portion by invading the entire bearing gap between the inner peripheral surface and the outer peripheral surface of the drive shaft D. However, when it is necessary to shorten the axial length of the bearing portion H3 due to the restriction of the arrangement space of the bearing portion accompanying the downsizing of the compressor, the length of the oil groove D3 facing the bearing portion H3 is also reduced. As a result, before the oil supplied to the oil groove D3 enters the bearing gap between the bearing portion H3 and the shaft outer peripheral surface, the oil supplied from the opening into the casing C to the inside of the casing C There is a problem that the amount of oil discharged to the oil tank increases and oil runs out. In order to solve this problem, it is conceivable to increase the pump supply capacity. However, even if the capacity is increased, the effective oil entering the gap does not increase, and the discharged oil merely increases. Therefore, wear and seizure still occur due to lack of oil in the bearing portion H3.

In the case of a horizontal compressor, the bearings are oriented in a horizontal direction, so that the oil groove does not open the oil groove D3 upward as in the case of the vertical compressor. Therefore, even if the axial length of the bearing portion is a predetermined length, the amount of oil discharged into the casing C becomes larger than the oil amount entering the bearing gap. This causes the above-mentioned problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object the advantage that oil can be satisfactorily introduced into a bearing gap between a drive shaft and a bearing, regardless of the configuration of the bearing. An object of the present invention is to provide a compressor that can eliminate a problem caused by cutting.

[0007]

According to the first aspect of the present invention,
A compression element 2, a drive shaft 6 for driving the compression element 2, and a bearing 51 supporting the drive shaft 6 are provided in a casing 1.
And a housing 5 having an oil groove 64 provided in an outer peripheral surface of a shaft portion of the drive shaft 6 supported by the bearing portion 51. The oil groove 64 is provided in the oil supply passage 62 provided in the drive shaft 6. In the compressor, which communicates and supplies oil to the bearing portion 51, the oil groove 6 having one end communicating with the oil supply passage 62 is provided.
The other end of the oil groove 64 is opened from the bearing portion 51 into the casing 1, and the oil groove 64 is opened into the casing 1 with respect to the oil supply amount from the oil supply passage 62 on the open side into the casing 1. The throttle portion 65 for controlling the oil discharge amount was formed.

According to a second aspect of the present invention, in the oil groove 64,
An oil reservoir 66 swelling forward in the drive rotation direction of the drive shaft 6 is formed with respect to the throttle 65, and a rear groove wall 67 located rearward in the drive rotation of the drive shaft 6 in the oil groove 64 is formed by the throttle At 65, the drive shaft 6 is linearly connected to a rear throttle wall 68 located rearward in the drive rotation direction of the drive shaft 6.

According to a third aspect of the present invention, the oil groove 64 is
By changing the groove depth along the length direction, the open-side groove depth of the oil groove 64 was reduced, and the throttle portion 65 was formed between the oil groove 64 and the bearing portion 51.

According to a fourth aspect of the present invention, the oil groove 64 is
The cross-sectional shape in the width direction has a wedge shape in which the groove depth is deep in the front of the drive shaft 6 in the drive rotation direction, and the groove depth is gradually reduced toward the rear in the drive rotation direction with respect to this deep groove portion.

According to a fifth aspect of the present invention, the oil groove 64 is
The depth of the groove changes along the length direction, and the depth of the groove on the open side of the oil groove 64 is reduced, so that the throttle 65
And the cross-sectional shape in the width direction of the oil groove 64 is
The groove depth is deeper in the front of the drive shaft 6 in the drive rotation direction, and the wedge shape is such that the groove depth gradually decreases toward the rear in the drive rotation direction with respect to this deep groove portion.

[0012]

According to the first aspect of the present invention, one end of the oil supply passage 62 is communicated with the oil supply passage 62 and the other end of the oil groove 64 is opened into the casing 1.
Since the throttle portion 65 for controlling the amount of oil discharged from the open side to the inside of the casing 1 is formed with respect to the amount of oil supplied from the second portion, the axial length of the bearing portion 51 is reduced, and the length of the oil groove 64 is reduced. Even if it is shortened accordingly, or when applied to a horizontal compressor, the oil groove 6
The amount of oil supplied to the casing 4 is suppressed by the throttle 65 to be discharged into the casing 1, and the oil supplied to the oil groove 64 is not immediately discharged into the casing 1, Will be stored in the groove 64,
The oil easily enters the bearing gap between the bearing portion 51 and the drive shaft 6 from the oil groove 64, and the oil intrusion easily forms an oil film over the entire bearing gap. As a result, running out of oil in the bearing portion 51 can be effectively prevented, and wear and seizure can be prevented. Furthermore, even if the compressor is stopped, the oil can be stored in the oil groove 64, so that when the oil is restarted, the oil can be prevented from running out until the oil from the oil pump reaches the bearing. is there.

According to the second aspect of the present invention, the oil groove 64 is provided.
An oil reservoir 66 bulging forward in the drive rotation direction of the drive shaft 6 is formed with respect to the throttle portion 65, and a rear groove wall 67 located behind the oil groove 64 in the drive rotation direction of the drive shaft 6.
Is linearly connected to the rear throttle wall 68 located rearward in the drive rotation direction of the drive shaft 6 in the throttle portion 65, so that the discharge of oil from the oil groove 64 is suppressed by the throttle portion 65. Even if dirt enters the oil groove 64 together with the oil while the oil remaining in the oil sump 66 is sufficiently supplied to the bearing portion 51, the dirt is linearly continuous with the rear groove wall. The oil is smoothly discharged into the casing 1 along with the oil along the linear portion between the rear wall 67 and the rear throttle wall 68.

According to the third aspect of the present invention, the oil groove 64
Of the oil groove 64 by changing the groove depth along the length direction.
Shallower groove depth on the open side of
Since the groove 5 is formed, only the groove processing is performed so as to change the depth while keeping the groove width of the oil groove 64 constant.
Since the oil groove 64 having the squeezed portion 65 can be formed, the groove having the narrowed portion 65 can be easily formed.

According to the fourth aspect of the present invention, the cross-sectional shape of the oil groove 64 in the width direction is such that the groove depth is deep in the front of the drive shaft 6 in the drive rotation direction, and the depth of the groove is large toward the rear in the drive rotation direction. Since the groove has a wedge shape in which the groove depth is gradually reduced, the discharge of the oil from the oil groove 64 into the casing 1 is suppressed by the throttle portion 65, and the oil supply to the bearing portion 51 can be sufficiently performed. Due to the wedge shape of the oil groove 64, oil can easily enter the bearing gap between the drive shaft 6 and the bearing portion 51 from the rear in the drive rotation direction where the groove depth gradually becomes shallower, The supply of oil can be performed more effectively.

According to the fifth aspect of the present invention, the oil groove 64
The groove depth varies along the length direction, and the oil groove 6
The groove depth of the oil groove 64 is made deeper in the drive rotation direction of the drive shaft 6 while the throttle part 65 is formed between the bearing groove 51 and the oil groove 64. Since the deep groove portion has a wedge shape in which the groove depth gradually decreases toward the rear in the driving rotation direction, the throttle portion 65 suppresses the discharge of oil from the oil groove 64 into the casing 1, In addition, the bearing portion 5 is formed by a wedge effect.
The oil groove 64 having the throttle portion 65 can be easily formed while the oil supply to the oil groove 1 can be more positively performed.

[0017]

FIG. 1 shows a horizontal scroll compressor used as a compressor of a refrigerating apparatus. On one side in a closed casing 1, a fixed scroll 3 in which a scroll 32 is projected from a head plate 31; A compression element 2 including a movable scroll 4 having a spiral body 42 protruding from a head plate 41 is disposed via a first housing 5, and a motor M having a drive shaft 6 is disposed on the other side. The pin portion 43 of the movable scroll 4 is attached to an eccentric cylindrical transmission portion 61 formed at the shaft end of the shaft 6 on the compression element side.
And the drive shaft 6 is supported by the bearing portion 51 of the first housing 5, and the rotation of the drive shaft 6 causes the suction gas to flow from the suction pipe 11 connected to the fixed scroll 3 to each spiral body. The compressed gas is compressed in the working chamber 12 defined between 32 and 42, and the compressed gas is discharged into the casing 1 and discharged to the outside from the discharge pipe 13 opened on the side opposite to the compression element.

An oil supply passage 62 communicating with the oil reservoir 1a through a positive displacement oil pump 14 is formed through the inside of the drive shaft 6, and the cylindrical transmission portion is provided through the oil supply passage 62. Oil is supplied to the bearing portion 50 between the bearing portion 61 and the pin portion 43, and is also supplied between the bearing portion 51 and the cylindrical transmission portion 61 of the drive shaft 6 via a branch passage 63 branched from the oil supply passage 62. It is made as much as possible.

Also, on the side of the motor M opposite to the compression element,
A second housing 7 having a bearing 71 for supporting the other side of the drive shaft 6 is provided.

In the first embodiment shown in FIGS. 1 to 3, one end of the drive shaft 6 supported by the bearing portion 51 is connected to the oil supply passage 62 via the branch passage 63 at one end thereof. Communication, the other end is within the casing 1 from the bearing 51,
More specifically, an oil groove 64 that opens in the first housing 5 communicating with the inside of the casing 1 is formed in the axial direction, and the amount of oil supplied from the oil supply passage 62 to the opening side of the oil groove 64 into the casing 1. In contrast, a throttle portion 65 for controlling the amount of oil discharged from the open side into the casing 1 is formed.

That is, as shown in FIG. 2, the oil groove 64 has an oil reservoir 66 extending in the axial direction from one end where the branch passage 63 opens, and a groove width at the other end of the oil reservoir 66. The throttle portion 65 is formed by the throttle portion 65 which is continuous from the center portion in the axial direction, and is narrower and shallower in depth than the groove width of the oil reservoir portion 66.
From the inside of the casing 1.

With the above configuration, the amount of oil supplied from the oil supply passage 62 to the oil groove 64 is suppressed by the throttle 65 to be discharged into the casing 1, and the oil sump 66 Therefore, the oil supplied into the oil groove 64 easily enters the bearing gap between the bearing portion 51 and the drive shaft 6 from the oil groove 64, and the oil supplied to the bearing gap is Supply can be made more efficient,
It is possible to prevent running out of oil in the bearing portion 51 and prevent wear and seizure. Furthermore, even if the compressor is stopped, the oil can be stored in the oil groove 64, so that when the oil is restarted, the oil can be prevented from running out until the oil from the oil pump reaches the bearing. is there.

Next, a second embodiment will be described with reference to FIGS. The oil groove 64 of the second embodiment is inclined rearward in the rotational direction from the opening side of the branch passage 63, and a drive shaft is provided for the throttle 65 provided on the opening side of the oil groove 64 into the casing 1. An oil reservoir 66 swelling forward in the drive rotation direction of the drive shaft 6 is formed, and a rear groove wall 67 located in the oil groove 64 behind the drive shaft 6 in the drive rotation direction is
In the diaphragm section 65, the diaphragm section 65 is linearly connected to a rear diaphragm wall 68 located behind the drive shaft 6 in the drive rotation direction.

By doing so, the discharge of the oil from the oil groove 64 into the casing 1 is suppressed by the throttle portion 65, and the oil remaining in the oil reservoir 66 can be sufficiently supplied to the bearing portion 51. However, even if dirt enters the oil groove 64 together with the oil, the dirt enters the casing 1 along with the oil along the linear portion of the rear groove wall 67 and the rear throttle wall 68 which are linearly continuous. It can be discharged smoothly.

Next, a third embodiment will be described with reference to FIGS. In the oil groove 64 of the third embodiment, the groove bottom is inclined linearly so that the groove width on the open side is shallow and the groove depth on the communication side to the oil supply passage 62 is deep with the groove width kept constant. Then, the groove depth is changed along the length direction, and between the inner peripheral surface of the bearing portion 51 and the oil supply passage 62 from the oil supply passage 62 on the opening side of the oil groove 64 into the casing 1. Throttle section 6 for controlling the amount of oil discharged from the open side into casing 1
5 was formed.

In this case, the oil groove 64 having the throttle portion 65 can be formed only by shaving the oil groove 64 so as to change the depth while keeping the groove width constant. While the discharge can be suppressed, the squeezing section 65
The groove processing having the above can be easily performed.

When the groove depth is changed as in the fourth embodiment shown in FIG. 8, the groove depth at both ends in the length direction of the oil groove 64 is shallow, and the center portion in the length direction is The oil groove 64 having the squeezed portion 65 can be formed more easily by rotating the disk-shaped grindstone and shaving it off. Next, a fifth embodiment will be described with reference to FIGS. The fifth embodiment is different from the first embodiment in that the throttle unit 65
In the oil groove 64 having a cross-sectional shape in the width direction of the oil groove 64, specifically, a cross-sectional shape in the width direction of the oil reservoir 66, the groove depth is deep in front of the drive shaft 6 in the driving rotation direction,
With respect to this deep groove portion, a wedge shape was formed in which the groove depth gradually decreased toward the rear in the drive rotation direction.

Therefore, the oil groove 6 is formed by the throttle 65.
In addition, while suppressing oil discharge from the casing 4 into the casing 1 and sufficiently supplying oil to the bearing portion 51, the wedge shape of the oil groove 64 reduces the groove depth gradually from the rear in the drive rotation direction. Oil can easily enter the bearing gap between the shaft 6 and the bearing portion 51, and the oil can be more effectively supplied to the bearing gap.

Further, as in the sixth embodiment shown in FIG.
As in the above-described third and fourth embodiments, when the throttle portion 65 is formed by changing the groove depth, the oil groove 6
The widthwise cross-sectional shape of No. 4 may be a wedge shape. That is,
The oil groove 64 has a groove depth that changes along the length direction, reduces the depth of the oil groove 64 on the open side, forms a throttle 65 with the bearing 51, and The cross-sectional shape of the oil groove 64 in the width direction is a wedge shape in which the groove depth is deep in the front of the drive shaft 6 in the drive rotation direction, and the groove depth gradually decreases toward the rear in the drive rotation direction with respect to this deep groove portion. is there.

In such a case, while the discharge of the oil from the oil groove 64 into the casing 1 is suppressed by the throttle portion 65 and the supply of the oil to the bearing portion 51 can be more positively performed by the wedge effect. Thus, the oil groove 64 having the throttle portion 65 can be easily formed.

As shown in the seventh embodiment of FIG.
The shape of the oil groove 64 is sequentially increased in width from the throttle portion 65, and the groove wall on the front side in the drive rotation direction of the drive shaft 6 is driven from the opening of the branch passage 63 communicating with the oil supply passage 62. The groove extends obliquely rearward in the rotational direction, and is formed in a triangular shape such that the rear groove wall in the drive rotational direction extends linearly in the axial direction. The groove may be formed in a wedge shape in which the depth of the groove is deep at the front and the depth of the groove gradually decreases toward the rear in the drive rotation direction with respect to this deep groove.

In this case, since the volume of the oil groove 64 can be increased, a large amount of oil can be stored in the oil groove 64 by suppressing the discharge of the oil by the throttle portion 65, and the oil in the bearing portion 51 can be reduced. Lubrication can be better achieved.

Although the above embodiments have been described with reference to a horizontal compressor, the present invention can also be applied to a vertical compressor. In the case of a vertical compressor, even if the bearing length of the bearing portion is reduced,
Since the discharge of the oil from the oil groove into the casing can be suppressed by the throttle, the lubrication in the bearing can be improved.

[0034]

According to the first aspect of the present invention, the other end of the oil groove 64 having one end communicating with the oil supply passage 62 is opened from the bearing portion 51 into the casing 1 and the oil groove 64 is closed. A throttle 65 is formed on the open side into the casing 1 to control the amount of oil discharged from the open side into the casing 1 with respect to the amount of oil supplied from the oil supply passage 62.
Even if the length of the oil groove 64 is shortened and the length of the oil groove 64 is accordingly shortened, or when applied to a horizontal compressor, the oil is supplied from the oil supply passage 62 to the oil groove 64. The amount of the oil to be discharged is suppressed by the throttle portion 65 into the casing 1, and can be stored in the oil groove 64. Therefore, the bearing gap between the bearing portion 51 and the drive shaft 6 from the oil groove 64 is reduced. This makes it easy for oil to penetrate, and this oil intrusion easily forms an oil film over the entire bearing gap. As a result, running out of oil in the bearing portion 51 can be effectively prevented, and wear and seizure can be prevented. Furthermore, even if the compressor is stopped, the oil can be stored in the oil groove 64, so that when the oil is restarted, the oil can be prevented from running out until the oil from the oil pump reaches the bearing. is there.

According to the second aspect of the present invention, the oil groove 6
4, an oil reservoir 66 swelling forward in the drive rotation direction of the drive shaft 6 with respect to the throttle portion 65, and a rear groove wall 67 located behind the oil groove 64 in the drive rotation direction of the drive shaft 6.
Is linearly connected to a rear throttle wall 68 located rearward in the drive rotation direction of the drive shaft 6 in the throttle portion 65, so that the discharge of oil from the oil groove 64 can be suppressed by the throttle portion 65. Even if dirt and oil enter the oil groove 64 while the oil remaining in the oil sump 66 is sufficiently supplied to the bearing portion 51, the dirt is linearly connected to the rear groove wall. Along with the oil, the oil can be smoothly discharged into the casing 1 along the linear portion between the 67 and the rear throttle wall 68.

According to the third aspect of the present invention, the oil groove 6
4 by changing the groove depth along the length direction,
Since the depth of the groove on the open side of the oil groove 4 is made shallow and the narrowed portion 65 is formed between the oil groove 64 and the bearing portion 51, the groove is formed only by changing the depth so that the groove width of the oil groove 64 is kept constant. Part 6
5 can be formed, so that the throttle portion 65 can be formed.
The groove processing having the above can be easily performed.

According to the fourth aspect of the present invention, the oil groove 6
4 has a wedge shape in which the groove depth is deep in the front of the drive shaft 6 in the drive rotation direction and the groove depth is gradually reduced toward the rear in the drive rotation direction with respect to this deep groove portion. The throttle portion 65 suppresses the discharge of oil from the oil groove 64 into the casing 1, and can sufficiently supply oil to the bearing portion 51. In addition, the wedge shape of the oil groove 64 reduces the groove depth. Oil can easily enter the bearing gap between the drive shaft 6 and the bearing portion 51 from the rear in the drive rotation direction, which gradually becomes shallower, and the oil can be more effectively supplied to the bearing gap.

According to the fifth aspect of the present invention, the oil groove 6
4, the groove depth is changed along the length direction, the open side groove depth of the oil groove 64 is reduced to form a throttle 65 with the bearing 51, and the oil groove 64 is formed. The cross-sectional shape in the width direction is formed in a wedge shape in which the groove depth is deep in the front of the drive shaft 6 in the drive rotation direction, and the groove depth gradually decreases toward the rear in the drive rotation direction with respect to this deep groove portion. The throttle portion 65 suppresses the discharge of oil from the oil groove 64 into the casing 1, and the wedge effect causes the bearing portion 5
The oil groove 64 having the throttle portion 65 can be easily formed while the oil supply to the oil groove 1 can be more positively performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a horizontal scroll compressor according to a first embodiment of the present invention.

FIG. 2 is a front view of a main part of a drive shaft having an oil groove according to the first embodiment.

FIG. 3 is a sectional view taken along line XX in FIG. 2;

FIG. 4 is a front view of a main part of a drive shaft having an oil groove according to a second embodiment.

FIG. 5 is a sectional view taken along line YY in FIG. 4;

FIG. 6 is a front view of a main part of a drive shaft having an oil groove according to a third embodiment.

FIG. 7 is a sectional view taken along the line ZZ in FIG. 6;

FIG. 8 is a sectional view of a main part of a drive shaft having an oil groove according to a fourth embodiment.

FIG. 9 is a front view of a main part of a drive shaft having an oil groove according to a fifth embodiment.

FIG. 10 is a partial sectional view of the oil groove in FIG. 9;

FIG. 11 is a front view of a main part of a drive shaft having an oil groove according to a sixth embodiment.

FIG. 12 is a front view of a main part of a drive shaft having an oil groove according to a seventh embodiment.

FIG. 13 is a partial cross-sectional view of a conventional scroll compressor.

FIG. 14 is a perspective view of an oil groove formed on a conventional drive shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Compression element 5 Housing 51 Bearing part 6 Drive shaft 62 Oil supply passage 64 Oil groove 65 Throttle part 66 Oil storage part 67 Rear groove wall 68 Rear throttle wall

──────────────────────────────────────────────────続 き Continued on the front page (72) Yukihiro Kitagawa 3-12 Chikushinmachi, Sakai City, Osaka Prefecture Daikin Industries Co., Ltd., Sakai Plant Rinkai Plant (72) Inventor Noboru Murata 312 Chikushinmachi, Sakai City, Osaka Prefecture Address Daikin Industrial Co., Ltd. Sakai Plant Rinkai Plant (56) References JP-A 64-29685 (JP, A) JP-A 4-1485 (JP, A) (58) Fields investigated (Int. Cl. ⁷⁾ , DB name) F04C 23/00-29/10

Claims (5)

(57) [Claims] 1. A compression element (2) in a casing (1).
And a drive shaft (6) for driving the compression element (2) and a housing (5) having a bearing (51) for supporting the drive shaft (6). An oil groove (64) is provided on the outer peripheral surface of the shaft portion of the drive shaft (6) supported by the above, and the oil groove (64) communicates with an oil supply passage (62) provided in the drive shaft (6). In a compressor adapted to supply oil to the bearing portion (51), one end is connected to the oil supply passage (6).
The other end of the oil groove (64) communicating with 2) is opened from the bearing portion (51) into the casing (1), and the oil groove (64) is opened on the open side of the oil groove (64) into the casing (1). A compressor characterized by forming a throttle (65) for controlling an amount of oil discharged from an open side into a casing (1) with respect to an amount of oil supplied from an oil supply passage (62). 2. An oil groove (64) is provided with respect to a throttle (65).
The oil reservoir (6) swelling forward in the drive rotation direction of the drive shaft (6).
(6) a rear groove wall (67) positioned rearward in the drive rotation direction of the drive shaft (6) in the oil groove (64).
2. The compressor according to claim 1, wherein the compressor is linearly connected to a rear throttle wall (68) located rearward in the drive rotation direction of the drive shaft (6) in the throttle section (65). 3. The oil groove (64) has a groove depth changed along the length direction to reduce the depth of the oil groove (64) on the open side, and is formed between the oil groove (64) and the bearing portion (51). 2. The compressor according to claim 1, wherein said throttle section (65) is formed. 4. The oil groove (64) has a cross-sectional shape in the width direction.
2. A wedge shape in which a groove depth is deep in the front of the drive shaft in the drive rotation direction and the groove depth is gradually reduced toward the rear in the drive rotation direction with respect to the deep groove portion.
The compressor as described. 5. The oil groove (64) has a groove depth varying along its length, the oil groove (64) having a reduced open-side groove depth, and being provided between the oil groove (64) and the bearing portion (51). And the oil groove (64) is formed so that the cross-sectional shape in the width direction of the oil groove (64) has a large groove depth in front of the drive shaft (6) in the drive rotation direction. The compressor according to claim 1, wherein the compressor has a wedge shape in which a groove depth gradually decreases toward the rear.