Scroll compressor

Abstract

In the scroll compressor of the present application, a longitudinal groove (35) of a prescribed length is formed on the shaft neck portion (31) from the upper end of the shaft neck portion (31), and a first oil supply hole (36) and a second oil supply hole (37) are formed which communicate with the main shaft oil supply hole (34) and open in the longitudinal groove (35), a first opening portion (36a) of the first oil supply hole (36) is located on the lower end side of the longitudinal groove (35), and a second opening portion (37a) of the second oil supply hole (37) is located on the upper end side of the longitudinal groove (35). In this way, the oil supply amount to the bearing portion (41) can be increased, damage to the bearing portion (41) can be reduced, and the refrigeration capacity and COP can be improved.

Description

Technical Field

[0001] This invention relates to scroll compressors used in cooling devices such as air conditioning units for cooling and heating, cold storage facilities, or refrigeration devices such as heat pump hot water supply units. Background Technology

[0002] In the scroll compressor described in Patent Document 1, the main shaft has: a journal portion disposed in the bearing portion; an eccentric shaft inserted into the boss portion; and a main shaft oil supply hole extending from the lower end of the main shaft to the eccentric shaft. Furthermore, a groove of a predetermined length is formed in the journal portion, and an oil supply hole communicating with the main shaft oil supply hole and opening within the longitudinal groove is formed.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-11482 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, in the scroll compressor described in Patent Document 1, since there is no path for discharging lubricating oil in the groove formed in the journal, the lubricating oil supplied from the oil supply hole into the groove is difficult to discharge out of the groove. Therefore, lubricating oil is difficult to supply from the oil supply hole into the groove, and insufficient lubricating oil cannot be supplied to the journal. As a result, the cooling capacity and COP will decrease, or the bearing may be damaged.

[0008] Therefore, the purpose of this invention is to provide a scroll compressor that can reduce damage to the bearing by increasing the oil supply to the bearing and improve cooling capacity and COP.

[0009] Methods for solving problems

[0010] The scroll compressor of the present invention, as described in technical solution 1, comprises a compression mechanism 10 for compressing refrigerant, an electric mechanism 20 for driving the compression mechanism 10, and a main shaft 30 that rotates under the action of the electric mechanism 20 to actuate the compression mechanism 10, all disposed within a sealed container 1. An oil storage portion 4 is formed at the bottom of the sealed container 1. The compression mechanism 10 has a fixed scroll member 11 and a rotating scroll member 12. The fixed scroll member 11 includes a circular plate-shaped fixed scroll member end plate 11a and an upright portion disposed on the fixed scroll member. The fixed vortex tooth 11b of the end plate 11a, the swirling vortex component 12 includes a circular plate-shaped swirling vortex component end plate 12a, swirling vortex teeth 12b erected on the vortex tooth side end face of the swirling vortex component end plate 12a, and a boss portion 12c formed on the opposite side to the vortex tooth side end face of the swirling vortex component end plate 12a, so that the fixed vortex tooth 11b and the swirling vortex tooth 12b mesh with each other, and a plurality of compression chambers 15 are formed between the fixed vortex tooth 11b and the swirling vortex tooth 12b. A main bearing 40 for supporting the fixed scroll member 11 and the rotating scroll member 12 is formed below the fixed scroll member 11 and the rotating scroll member 12. The main bearing 40 has a bearing portion 41 for supporting the main shaft 30 and a boss receiving portion 42 for receiving the boss portion 12c. The main shaft 30 has: a journal 31 disposed in the bearing portion 41; an eccentric shaft 32 inserted into the boss portion 12c; and a main shaft oil supply hole 34 extending from the lower end 33 of the main shaft 30 to the eccentric shaft 32. This scroll-type pressure... The compressor guides the lubricating oil located in the oil reservoir 4 to the bearing section 41 through the spindle oil supply hole 34. The bearing section 41 is characterized by having a longitudinal groove 35 of a predetermined length formed on the journal 31, starting from the upper end of the journal 31. A first oil supply hole 36 and a second oil supply hole 37, communicating with the spindle oil supply hole 34 and opening in the longitudinal groove 35, are also formed. The first opening 36a of the first oil supply hole 36 is located at the lower end of the longitudinal groove 35, and the second opening 37a of the second oil supply hole 37 is located at the upper end of the longitudinal groove 35.

[0011] The feature of the present invention described in technical solution 2 is that, in the scroll compressor described in technical solution 1, the second opening 37a is enlarged by using the chamfered portion 37b.

[0012] The present invention described in technical solution 3 is characterized in that, in the scroll compressor described in technical solution 1 or 2, the upper part 41u of the bearing part 41 becomes a thick-walled part relative to the lower part 41d of the bearing part 41, the first opening 36a is located in the lower part 41d of the bearing part 41, and the second opening 37a is located in the upper part 41u of the bearing part 41.

[0013] The present invention described in technical solution 4 is characterized in that, in the scroll compressor described in any one of technical solutions 1 to 3, a slit 44 extending from the upper end to the lower end is formed on the inner circumferential surface of the bearing portion 41.

[0014] The present invention described in technical solution 5 is characterized in that, in the scroll compressor described in technical solution 4, a bushing 41a is disposed on the inner periphery of the bearing portion 41, and the slit 44 is formed by the bushing 41a.

[0015] The present invention described in technical solution 6 is characterized in that, in the scroll compressor described in any one of technical solutions 1 to 5, an annular flexible groove 46 is formed on the upper end face 41b of the bearing portion 41.

[0016] The feature of the present invention described in technical solution 7 is that, in the scroll compressor described in any one of technical solutions 1 to 6, the total length of the bearing part 41 is L, and the inner diameter of the bearing part 41 is D, satisfying L / D≤1.

[0017] The feature of the present invention described in technical solution 8 is that, in the scroll compressor described in any one of technical solutions 1 to 7, the operating range includes 30 seconds. -1 The following rotational speeds.

[0018] Invention Effects

[0019] According to the present invention, since the longitudinal groove reaches the upper end of the journal, the lubricating oil supplied to the longitudinal groove can be discharged from the upper end of the journal. Therefore, sufficient lubricating oil can be supplied to the longitudinal groove from the first oil supply hole and the second oil supply hole. Furthermore, the first opening of the first oil supply hole is located on the lower end side of the longitudinal groove, and the second opening of the second oil supply hole is located on the upper end side of the longitudinal groove, thereby allowing the amount of lubricating oil supplied to the longitudinal groove to increase evenly. This improves cooling capacity, COP, and reduces input. Additionally, it reduces damage to the upper end of the bearing. Attached Figure Description

[0020] Figure 1 This is a longitudinal cross-sectional view of a scroll compressor according to an embodiment of the present invention.

[0021] Figure 2 It means Figure 1 The side view of the main shaft of the scroll compressor shown.

[0022] Figure 3 It means Figure 1 The diagram shows a cross-sectional view of the bearing section and journal of a scroll compressor.

[0023] Figure 4 It means Figure 1 The diagram shows the main bearing of a scroll compressor.

[0024] Figure 5 It means Figure 1 The graph shows the performance verification results of the scroll compressor. Detailed Implementation

[0025] In the scroll compressor of the first embodiment of the present invention, a longitudinal groove of a predetermined length is formed on the journal shaft, starting from the upper end of the journal shaft. A first oil supply hole and a second oil supply hole, communicating with the main shaft oil supply hole and opening into the longitudinal groove, are formed therein. The first opening of the first oil supply hole is located at the lower end of the longitudinal groove, and the second opening of the second oil supply hole is located at the upper end of the longitudinal groove. According to this embodiment, since the longitudinal groove reaches the upper end of the journal shaft, the lubricating oil supplied to the longitudinal groove can be discharged from the upper end of the journal shaft. Therefore, sufficient lubricating oil can be supplied to the longitudinal groove from the first and second oil supply holes. Furthermore, since the first opening of the first oil supply hole is located at the lower end of the longitudinal groove, and the second opening of the second oil supply hole is located at the upper end of the longitudinal groove, the amount of lubricating oil supplied to the longitudinal groove can be increased evenly. This improves cooling capacity, COP, and reduces input. Additionally, it reduces damage to the upper end of the bearing.

[0026] The second embodiment of the present invention is configured such that, in the scroll compressor of the first embodiment, the second opening is enlarged by using a chamfered portion. According to this embodiment, by enlarging the second opening by using the chamfered portion, lubricating oil with high hydraulic pressure (due to the centrifugal force generated by the rotation of the main shaft) discharged from the second oil supply hole can be supplied over a wide range at the upper end of the bearing.

[0027] In the third embodiment of the present invention, in the scroll compressor of the first or second embodiment, the upper part of the bearing portion becomes a thick-walled portion relative to the lower part of the bearing portion, the first opening is located at the lower part of the bearing portion, and the second opening is located at the upper part of the bearing portion. According to this embodiment, by positioning the second opening at the upper part of the bearing portion, which is a thick-walled portion, damage to the difficult-to-deform thick-walled portion (the upper end of the bearing) can be reduced. Furthermore, the cooling capacity and COP can be improved, and the input can be reduced.

[0028] The fourth embodiment of the present invention is configured such that, in the scroll compressor of any one of the first to third embodiments, a slit extending from the upper end to the lower end is formed on the inner circumferential surface of the bearing portion. According to this embodiment, lubricating oil can be discharged from the slit when the longitudinal groove passes through it due to the rotation of the main shaft, thus enabling oil supply to the lower end of the journal shaft that does not have a longitudinal groove.

[0029] In the fifth embodiment of the present invention, in the scroll compressor of the fourth embodiment, a bushing is disposed on the inner circumference of the bearing portion, and a slit is formed by the bushing. According to this embodiment, the slit can be formed by the bushing.

[0030] The sixth embodiment of the present invention is configured such that, in the scroll compressor of any one of the first to fifth embodiments, an annular flexible groove is formed on the upper end face of the bearing portion. According to this embodiment, by forming a flexible groove in the upper part of the bearing portion, which is a thick-walled portion, deformation can be easily generated, and the stress generated at the upper end of the bearing due to bearing load can be reduced.

[0031] The seventh embodiment of the present invention is configured such that, in the scroll compressor of any one of the first to sixth embodiments, the total length of the bearing portion is L, and the inner diameter of the bearing portion is D, satisfying L / D≤1. According to this embodiment, the bearing portion with L / D≤1 is more effective.

[0032] The eighth embodiment of the present invention is configured such that, in the scroll compressor of any one of the first to seventh embodiments, the operating range includes 30 seconds. -1 The following rotational speeds. According to this embodiment, for 30 seconds... -1 The following rotation speeds are more effective.

[0033]

Example

[0034] The following describes a scroll compressor according to an embodiment of the present invention. However, the present invention is not limited to the following embodiment.

[0035] Figure 1 This is a longitudinal cross-sectional view of the scroll compressor in this embodiment.

[0036] The sealed container 1 contains a compression mechanism 10 for compressing refrigerant, an electric mechanism 20 for driving the compression mechanism 10, and a main shaft 30 that rotates under the action of the electric mechanism 20 to move the compression mechanism 10.

[0037] The sealed container 1 includes a main body 1a formed as a cylinder extending in the vertical direction, an upper cover 1c that closes the upper opening of the main body 1a, and a lower cover 1b that closes the lower opening of the main body 1a.

[0038] The sealed container 1 is provided with a refrigerant suction pipe 2 for introducing refrigerant into the compression mechanism 10, and a refrigerant discharge pipe 3 for discharging the refrigerant compressed by the compression mechanism 10 to the outside of the sealed container 1.

[0039] The compression mechanism 10 has a fixed scroll member 11 and a rotating scroll member 12. The rotating scroll member 12 is driven to rotate by the main shaft 30.

[0040] The electric mechanism 20 includes a stator 21 fixed to the sealed container 1 and a rotor 22 disposed inside the stator 21. The main shaft 30 is fixed to the rotor 22.

[0041] A main bearing 40 supporting the fixed scroll member 11 and the rotating scroll member 12 is provided below them.

[0042] The main bearing 40 has a bearing portion 41 for supporting the main shaft 30, a boss housing portion 42, a sealing annular recess 43, and a rotation-limiting annular recess 45. The main bearing 40 is fixed to the sealed container 1 by welding and hot pressing.

[0043] The fixed scroll member 11 includes a circular plate-shaped fixed scroll member end plate 11a, fixed scroll teeth 11b erected on the fixed scroll member end plate 11a, and an outer peripheral wall portion 11c erected around the fixed scroll teeth 11b. An outlet 14 is formed approximately at the center of the fixed scroll member end plate 11a. A discharge valve (not shown) is provided at the outlet 14.

[0044] The swirling vortex member 12 includes a circular plate-shaped swirling vortex member end plate 12a, swirling vortex teeth 12b erected on the vortex tooth side end face of the swirling vortex member end plate 12a, and a cylindrical boss portion 12c formed on the opposite side of the vortex tooth side end face of the swirling vortex member end plate 12a.

[0045] The fixed vortex teeth 11b of the fixed vortex component 11 mesh with the rotating vortex teeth 12b of the rotating vortex component 12, and a plurality of compression chambers 15 are formed between the fixed vortex teeth 11b and the rotating vortex teeth 12b.

[0046] A boss portion 12c is formed approximately at the center of the end plate 12a of the vortex member. The boss portion 12c is housed in a boss housing portion 42.

[0047] The main spindle 30 includes: a journal 31 disposed in the bearing portion 41; an eccentric shaft 32 inserted into the boss portion 12c; and a main spindle oil supply hole 34 extending from the lower end 33 of the main spindle 30 to the eccentric shaft 32. The eccentric shaft 32 is formed at the upper end of the main spindle 30, and the journal 31 is formed below the eccentric shaft 32.

[0048] The fixed scroll member 11 is fixed to the main bearing 40 by multiple bolts 16 on its outer peripheral wall 11c. On the other hand, the rotating scroll member 12 is supported on the fixed scroll member 11 via a rotation limiting member 17, such as an Oldham's ring. The rotation limiting member 17 restricts the rotation of the rotating scroll member 12. The rotation limiting member 17 is disposed in an annular recess 45 for rotation limiting members and is located between the fixed scroll member 11 and the main bearing 40. Thus, the rotating scroll member 12 rotates relative to the fixed scroll member 11 without rotating.

[0049] The lower end 33 of the main shaft 30 is supported by the auxiliary bearing 18 located at the bottom of the sealed container 1.

[0050] An oil reservoir 4 for storing lubricating oil is formed at the bottom of the sealed container 1.

[0051] A positive displacement oil pump 5 is installed at the lower end of the main shaft 30. The oil pump 5 is configured such that its suction inlet is located inside the oil reservoir 4. The oil pump 5 is driven by the main shaft 30. The oil pump 5 can reliably draw lubricating oil from the oil reservoir 4 located at the bottom of the sealed container 1 regardless of pressure conditions and operating speed, thus eliminating concerns about lubricating oil depletion.

[0052] The lubricating oil drawn by the oil pump 5 is supplied to the bearing, bearing portion 41, and boss portion 12c of the auxiliary bearing 18 through the main shaft oil supply hole 34 formed in the main shaft 30.

[0053] Refrigerant drawn in through refrigerant suction pipe 2 is guided from suction port 15a to compression chamber 15. Compression chamber 15 moves from the outer periphery towards the center while reducing its volume. The refrigerant reaches a predetermined pressure in compression chamber 15. The refrigerant that has reached the predetermined pressure pushes open the discharge valve from discharge port 14 and is discharged into discharge chamber 6, exiting into the upper part of the sealed container 1. Then, the discharged refrigerant reaches the vicinity of electric mechanism section 20 through the refrigerant passage (not shown) formed in compression mechanism section 10, and is discharged from refrigerant discharge pipe 3.

[0054] In this embodiment, the boss housing 42 of the scroll compressor is a high-pressure region, and the outer periphery of the rotating scroll member 12, which is equipped with the rotation limiting member 17, is an intermediate-pressure region. The pressure of the high-pressure region and the intermediate-pressure region is used to press the rotating scroll member 12 against the fixed scroll member 11.

[0055] The eccentric shaft 32 is inserted into the boss portion 12c in a rotatable drive manner via a swivel bearing. An oil groove 38 is formed on the outer circumferential surface of the eccentric shaft 32 (see reference). Figure 2 ).

[0056] An annular recess 43 for sealing is formed on the thrust surface of the main bearing 40. The thrust surface of the main bearing 40 is subjected to the thrust of the vortex end plate 12a. An annular sealing member is provided in the annular recess 43 for sealing. The sealing member is disposed on the outer periphery of the boss receiving portion 42.

[0057] The sealed container 1 is filled with refrigerant at the same high pressure as the refrigerant discharged into the discharge chamber 6, and the main shaft oil supply hole 34 opens at the upper end of the eccentric shaft 32. Therefore, the pressure inside the boss portion 12c becomes a high-pressure region with the same pressure as the discharged refrigerant.

[0058] Lubricating oil is introduced into the boss portion 12c through the spindle oil supply hole 34. The lubricating oil is supplied to the swivel bearing and the boss housing portion 42 through the oil groove 38 formed on the outer peripheral surface of the eccentric shaft 32. Since a sealing component is provided on the outer periphery of the boss housing portion 42, the boss housing portion 42 is a high-pressure area.

[0059] Figure 2 It means Figure 1 The side view of the main shaft of the scroll compressor shown.

[0060] A longitudinal groove 35 of a predetermined length is formed on the journal 31, starting from the upper end of the journal 31. Additionally, a first oil supply hole 36 and a second oil supply hole 37, communicating with the spindle oil supply hole 34 and opening into the longitudinal groove 35, are formed on the journal 31. The first oil supply hole 36 and the second oil supply hole 37 are formed radially on the journal 31. The first oil supply hole 36 and the second oil supply hole 37 have the same diameter.

[0061] The first opening 36a of the first oil supply hole 36 is located at the lower end of the longitudinal groove 35, and the second opening 37a of the second oil supply hole 37 is located at the upper end of the longitudinal groove 35.

[0062] The second opening 37a passes through the chamfered portion 37b (see reference). Figure 3 The chamfered portion 37b is enlarged in the vertical direction of the longitudinal groove 35 by a length equal to the width of the longitudinal groove 35. In this embodiment, the chamfered portion 37b is formed in a circular shape, but it can also be elliptical or other shapes. However, the chamfered portion 37b is preferably enlarged in the vertical direction of the longitudinal groove 35 by a length equal to the width of the longitudinal groove 35.

[0063] The lubricating oil located in the oil reservoir 4 is guided to the inner circumferential surface of the bearing section 41 through the spindle oil supply hole 34, the first oil supply hole 36 and the second oil supply hole 37.

[0064] In this way, since the longitudinal groove 35 reaches the upper end of the journal 31, the lubricating oil supplied to the longitudinal groove 35 can be discharged from the upper end of the journal 31. Therefore, sufficient lubricating oil can be supplied to the longitudinal groove 35 from the first oil supply hole 36 and the second oil supply hole 37. In addition, the first opening 36a of the first oil supply hole 36 is located on the lower end side of the longitudinal groove 35, and the second opening 37a of the second oil supply hole 37 is located on the upper end side of the longitudinal groove 35, thereby increasing the amount of lubricating oil supplied to the longitudinal groove 35 evenly and reducing damage to the upper end of the bearing. As a result, cooling capacity, COP can be improved, and input can be reduced.

[0065] Furthermore, by enlarging the second opening 37a using the chamfered portion 37b, lubricating oil (due to the centrifugal force generated by the rotation of the spindle) discharged from the second oil supply hole can be supplied over a wide range at the upper end of the bearing.

[0066] Figure 3 It means Figure 1 The diagram shows a cross-sectional view of the bearing section and journal of a scroll compressor.

[0067] The upper part 41u of the bearing part 41 becomes a thick-walled part relative to the lower part 41d of the bearing part 41.

[0068] The first opening 36a is located in the lower part 41d of the bearing part 41, and the second opening 37a is located in the upper part 41u of the bearing part 41.

[0069] In this way, by positioning the second opening 37a above the upper part 41u (upper end of the bearing) of the bearing portion 41, which is a thick-walled portion, damage to the thick-walled portion, which is difficult to deform, can be reduced. As a result, cooling capacity and COP can be improved, and input can be reduced.

[0070] A bushing 41a is disposed on the inner circumference of the bearing portion 41 (see reference). Figure 4 ).

[0071] An annular flexible groove 46 is formed on the upper end face 41b of the bearing portion 41. By forming the flexible groove 46 on the upper part 41u of the bearing portion 41, which is a thick-walled portion, deformation can be easily generated.

[0072] Figure 4 It means Figure 1 The diagram shows the main bearing of a scroll compressor.

[0073] Figure 4 (a) is a top view of the main bearing. Figure 4 (b) is a side cross-sectional view of the main bearing. Figure 4 (c) is Figure 4 Enlarged view of the main part of (a).

[0074] like Figure 4 As shown in (b), let the total length of the bearing section 41 be L, and the inner diameter of the bearing section 41 be D, satisfying L / D≤1. This embodiment has a better effect on the bearing section 41 with L / D≤1.

[0075] In addition, such as Figure 4 As shown in (c), a slit 44 extending from the upper end to the lower end is preferably formed on the inner circumferential surface of the bearing portion 41. By forming such a slit 44, lubricating oil can be discharged from the slit 44 when the longitudinal groove 35 passes through the slit 44 due to the rotation of the spindle 30. Therefore, oil can also be supplied to the portion of the journal 31 without the longitudinal groove. In this embodiment, a bushing 41a is disposed on the inner circumference of the bearing portion 41, and the slit 44 is formed by the bushing 41a.

[0076] Figure 5 It means Figure 1 The graph shows the performance verification results of the scroll compressor.

[0077] Figure 5 (a) represents the cooling capacity. Figure 5 (b) represents the input. Figure 5 (c) indicates COP, setting the rotation speed to 30s. -1 60s -1 90s-1 Perform a performance comparison.

[0078] The lower oil supply is a comparative example with only the first oil supply hole 36, the upper oil supply is a comparative example with only the second oil supply hole 37, and the two oil supply holes are those of this embodiment, which has both the first oil supply hole 36 and the second oil supply hole 37. The comparative example with only the first oil supply hole 36, i.e., the lower oil supply, is used as 100% for comparison.

[0079] like Figure 5 As shown in (a), the cooling capacity of this embodiment increases at all speeds, especially at medium speed (60s). -1 90s -1 The effect is better under )

[0080] like Figure 5 As shown in (b), the input of this embodiment is reduced at all speeds, especially at low speeds (30s). -1 The effect is better under )

[0081] like Figure 5 As shown in (c), the COP of this embodiment increases at all speeds, especially at low speeds (30s). -1 The effect is better under )

[0082] In this example, for 30 seconds -1 The following speed range is optimal, thus this is a variable-speed scroll compressor. Therefore, this embodiment is best suited for operating ranges including 30 seconds. -1 The following compressor speeds.

[0083] Industrial availability

[0084] The scroll compressor of the present invention is useful for refrigeration cycle devices such as hot water heating devices, air conditioning devices, water heaters or refrigeration machines.

[0085] Explanation of reference numerals in the attached figures

[0086] 1. Sealed container

[0087] 1a Main Cadre

[0088] 1b Lower cover

[0089] 1c top cover

[0090] 2 Refrigerant suction pipe

[0091] 3 Refrigerant discharge pipe

[0092] 4. Oil storage section

[0093] 5 oil pumps

[0094] 6. Exhaust chamber

[0095] 10. Compression Mechanism Department

[0096] 11 Fixed scroll component

[0097] 11a Fixed scroll end plate

[0098] 11b Fixed vortex teeth

[0099] 11c Peripheral wall portion

[0100] 12 gyratory scroll components

[0101] 12a Rotary scroll end plate

[0102] 12b Cycloidal Vortex

[0103] 12c Boss section

[0104] 14 Discharge outlets

[0105] 15 Compression Chamber

[0106] 15a Inlet

[0107] 16 bolts

[0108] 17 Rotation limiting components

[0109] 18 sets of bearings

[0110] 20 Electric Mechanism Department

[0111] 21 Stator

[0112] 22 Rotors

[0113] 30 spindle

[0114] 31 journal bearing

[0115] 32 Eccentric Shaft

[0116] 33 Lower end

[0117] 34 Spindle oil supply hole

[0118] 35 Longitudinal Groove

[0119] 36 Oil supply hole No. 1

[0120] 36a First opening

[0121] 37 No. 2 oil supply hole

[0122] 37a Second opening

[0123] 37b Chamfered section

[0124] 38 Oil tank

[0125] 40 main bearing

[0126] 41 Bearing section

[0127] 41a Bushing

[0128] 41b Upper end face

[0129] 41d lower part

[0130] 41u Upper part (upper end of bearing)

[0131] 42. Surface storage unit

[0132] 43. Annular recess for sealing

[0133] 44 Slit

[0134] 45. Annular recess for rotation limiting component

[0135] 46 Flexible groove.

Claims

1. A scroll compressor, characterized in that: The container includes a compression mechanism for compressing refrigerant, an electric mechanism for driving the compression mechanism, and a main shaft that rotates under the action of the electric mechanism to actuate the compression mechanism. An oil storage section is formed at the bottom of the sealed container. The compression mechanism includes a fixed scroll component and a rotating scroll component. The fixed scroll component includes a circular plate-shaped fixed scroll component end plate and fixed scroll teeth erected on the fixed scroll component end plate. The swirling scroll component includes a circular plate-shaped swirling scroll component end plate, swirling scroll teeth erected on the scroll tooth side end face of the swirling scroll component end plate, and a boss portion formed on the opposite side of the scroll tooth side end face of the swirling scroll component end plate. The fixed vortex tooth and the rotary vortex tooth mesh with each other, forming multiple compression chambers between the fixed vortex tooth and the rotary vortex tooth. A main bearing for supporting the fixed scroll member and the rotary scroll member is provided below them. The main bearing has a bearing portion for supporting the main shaft and a boss receiving portion for receiving the boss portion. The spindle includes: a journal disposed in the bearing portion; an eccentric shaft inserted into the boss portion; and a spindle oil supply hole extending from the lower end of the spindle to the eccentric shaft. The scroll compressor guides the lubricating oil located in the oil reservoir to the bearing section via the main shaft oil supply hole, wherein... A longitudinal groove of a predetermined length is formed on the journal, starting from the upper end of the journal. Furthermore, it has a first oil supply hole and a second oil supply hole that communicate with the main spindle oil supply hole and open in the longitudinal groove. The first opening of the first oil supply hole is located at the lower end of the longitudinal groove. The second opening of the second oil supply hole is located on the upper end side of the longitudinal groove. The second opening is enlarged by using a chamfered portion. The upper part of the bearing portion is a thick-walled portion relative to the lower part of the bearing portion. The first opening is located at the lower part of the bearing portion. The enlarged second opening is located at the upper part of the bearing portion. A slit extending from the upper end to the lower end is formed on the inner circumferential surface of the bearing portion.

2. The scroll compressor as described in claim 1, characterized in that: A bushing is disposed on the inner circumference of the bearing portion, and the slit is formed by the bushing.

3. The scroll compressor as described in claim 1 or 2, characterized in that: An annular flexible groove is formed on the upper end face of the bearing portion.

4. The scroll compressor as described in claim 1 or 2, characterized in that: Let the total length of the bearing part be L, and the inner diameter of the bearing part be D, satisfying L / D≤1.

5. The scroll compressor as described in claim 1 or 2, characterized in that: The operating range includes speeds below 30 r / s.

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