Scroll compressor

Abstract

In the scroll compressor, a pair of fixed scroll side key portions (17a) that slide with respect to a fixed scroll (11) and a pair of orbiting scroll side key portions (17b) that slide with respect to an orbiting scroll (12) are provided on the upper surface of an Oldham ring (17), and an oil drain groove (60) is formed in a recess thrust surface (45a) of an Oldham ring recess (45) formed in a main bearing (40). A cross-shaped sliding ring lower surface groove (61) is arranged as an oil drainage groove (60), and the cross-shaped sliding ring lower surface groove (61) is formed on a concave thrust surface (45a) at the position of a pair of fixed scroll side key parts (17a), so that the compressor input and the load on the cross-shaped sliding ring (17) can be reduced by reducing oil compression when the cross-shaped sliding ring (17) moves.

Description

Technical Field

[0001] The present invention relates to a scroll compressor used in cooling devices such as cooling and heating air conditioners, cold storages, or refrigeration devices such as heat pump water heaters. Background Art

[0002] The scroll compressor described in Patent Document 1 forms a connecting space on the end plate of the movable scroll member to connect the movable side passage and the annular space. When the movable scroll member performs eccentric rotation, the oil in the annular space flows into the connecting space, and the oil in the connecting space flows out to the compression chamber through the movable side passage. Therefore, in the scroll compressor described in Patent Document 1, the oil in the annular space can be discharged, and the stirring loss of the oil can be suppressed.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-7933 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The back pressure chamber in which the Oldham ring is disposed is filled with lubricating oil. Therefore, when the Oldham ring moves, oil compression occurs in the reduced peripheral clearance on the Oldham ring side close to the concave wall surface.

[0008] Therefore, an object of the present invention is to provide a scroll compressor capable of reducing compressor input and load on the Oldham ring by alleviating oil compression during movement of the Oldham ring.

[0009] Methods for solving problems

[0010] The scroll compressor of the present invention described in technical solution 1 is characterized in that a compression mechanism part 10 capable of compressing refrigerant, an electric mechanism part 20 driving the compression mechanism part 10, and a main shaft 30 that causes the compression mechanism part 10 to operate by rotating the electric mechanism part 20 are arranged in a closed container 1, an oil storage part 4 is formed at the bottom of the closed container 1, the compression mechanism part 10 has a fixed scroll 11 and a swirl scroll 12, the fixed scroll 11 includes: a circular plate-shaped fixed scroll end plate 11a, and a fixed scroll tooth 11b uprightly arranged on the fixed scroll end plate 11a, the swirl scroll 12 includes: a circular plate-shaped swirl scroll end plate 12a, a swirl scroll tooth 12b uprightly arranged on the swirl tooth side end surface of the swirl scroll end plate 12a, and a boss part 12c formed on the opposite side of the swirl tooth side end surface of the swirl scroll end plate 12a, The fixed scroll 11b and the orbiting scroll 12b are meshed with each other, a plurality of compression chambers 15 are formed between the fixed scroll 11b and the orbiting scroll 12b, a main bearing 40 supporting the fixed scroll 11 and the orbiting scroll 12 is provided below the fixed scroll 11 and the orbiting scroll 12, a cross ring 17 for limiting the rotation of the orbiting scroll 12 is provided between the main bearing 40 and the fixed scroll 11, and a plurality of compression chambers 15 are formed between the fixed scroll 11b and the orbiting scroll 12b. The main bearing 40 includes a bearing portion 41 for axially supporting the main shaft 30, a boss receiving portion 42 for receiving the boss portion 12c, and a cross ring recess 45 for configuring the cross ring 17. The main shaft 30 includes an oil supply hole 34 extending from the lower end 33 to the upper end. The lubricating oil in the oil storage portion 4 is guided to the cross ring recess 45 via the oil supply hole 34. An oil drain groove 60 is formed on the recess thrust surface 45a of the cross ring recess 45.

[0011] The present invention described in Technical Solution 2 is characterized in that, in the scroll compressor described in Technical Solution 1, the upper surface of the Cross ring 17 is provided with: a pair of fixed scroll side key portions 17a sliding relative to the fixed scroll 11, and a pair of orbiting scroll side key portions 17b sliding relative to the orbiting scroll 12, a Cross ring lower surface groove 61 is provided as the oil drain groove 60, and the Cross ring lower surface groove 61 is formed on the recessed thrust surface 45a where the pair of fixed scroll side key portions 17a are located.

[0012] The present invention according to claim 3 is characterized in that, in the scroll compressor according to claim 1 , an annular groove 62 is provided as the oil drain groove 60 , and the annular groove 62 is formed on the outer periphery of the recessed thrust surface 45 a .

[0013] The present invention described in Technical Solution 4 is characterized in that, in the scroll compressor described in Technical Solution 1, the upper surface of the Cross ring 17 is provided with: a pair of fixed scroll side key portions 17a sliding relative to the fixed scroll 11; and a pair of orbiting scroll side key portions 17b sliding relative to the orbiting scroll 12, a connecting groove 63 is provided as the oil drain groove 60, and the connecting groove 63 is formed on the recessed thrust surface 45a where the pair of fixed scroll side key portions 17a are not located.

[0014] The present invention described in Technical Solution 5 is characterized in that, in the scroll compressor described in Technical Solution 2, the radial lower surface groove width 61L of the lower surface groove 61 of the Cross ring is larger than the radial fixed scroll side key portion width 17L of the Cross ring 17 where the fixed scroll side key portion 17a is located.

[0015] The present invention according to claim 6 is characterized in that, in the scroll compressor according to claim 3 , the annular groove 62 is formed along the recessed wall surface 45 b .

[0016] The present invention described in claim 7 is characterized in that, in the scroll compressor described in claim 4 , the plurality of communication grooves 63 are arranged symmetrically with respect to an imaginary X-axis line passing through the pair of fixed scroll side key portions 17 a .

[0017] Effects of the Invention

[0018] According to the present invention, when the Cross ring moves, the lubricating oil existing in the reduced peripheral gap on the side of the Cross ring close to the recessed wall surface is moved from the reduced peripheral gap through the oil drain groove, so that the oil compression caused by the lubricating oil existing in the reduced peripheral gap can be alleviated, and the compressor input and the load on the Cross ring can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention.

[0020] Figure 2 Yes means Figure 1 A three-dimensional view of the cross slip ring shown.

[0021] Figure 3 Yes means Figure 1 Diagram of the main bearing of a scroll compressor is shown.

[0022] Figure 4 Yes means Figure 1 Diagram of the main bearing and Oldham ring of a scroll compressor shown.

[0023] Figure 5It is a cross-sectional view showing a main bearing according to another embodiment of the present invention.

[0024] Figure 6 A plan view showing a main bearing according to still another embodiment of the present invention.

[0025] Figure 7 It is a top view of a main bearing showing still another embodiment of the present invention. DETAILED DESCRIPTION

[0026] The scroll compressor of the first embodiment of the present invention is a compressor in which an oil drain groove is formed on the concave thrust surface of the concave portion for the Oldham ring. According to this embodiment, when the Oldham ring moves, the lubricating oil existing in the reduced peripheral gap on the side of the Oldham ring close to the concave wall surface moves through the oil drain groove, thereby relieving the oil compression caused by the lubricating oil existing in the reduced peripheral gap, and reducing the compressor input and the load on the Oldham ring.

[0027] The second embodiment of the present invention is that in the scroll compressor of the first embodiment, the upper surface of the cross ring is provided with: a pair of fixed scroll side key portions sliding relative to the fixed scroll; and a pair of orbiting scroll side key portions sliding relative to the orbiting scroll, a cross ring lower surface groove is provided as an oil drain groove, and a cross ring lower surface groove is formed on the concave thrust surface where the pair of fixed scroll side key portions are located. According to this embodiment, when the cross ring moves, the lubricating oil existing in the reduced peripheral gap can be moved to the inner peripheral space of the cross ring through the cross ring lower surface groove.

[0028] The third embodiment of the present invention is that, in the scroll compressor of the first embodiment, an annular groove is provided as an oil drain groove, and the annular groove is formed on the outer periphery of the concave thrust surface. According to this embodiment, when the Oldham ring moves, the lubricating oil existing in the reduced peripheral gap can be moved through the annular groove to the expanded gap on the side of the Oldham ring away from the concave wall surface.

[0029] The fourth embodiment of the present invention is that in the scroll compressor of the first embodiment, the upper surface of the cross ring is provided with: a pair of fixed scroll side key portions sliding relative to the fixed scroll; and a pair of orbiting scroll side key portions sliding relative to the orbiting scroll, a connecting groove is provided as an oil drain groove, and a connecting groove is formed on the thrust surface of the concave portion where the pair of fixed scroll side key portions are not located. According to this embodiment, when the cross ring moves, the lubricating oil existing in the reduced peripheral gap can be moved to the inner peripheral space of the cross ring through the connecting groove.

[0030] The fifth embodiment of the present invention is that, in the scroll compressor of the second embodiment, the radial lower surface groove width of the Oldham ring lower surface groove is larger than the radial fixed scroll side key portion width of the Oldham ring where the fixed scroll side key portion is located. According to this embodiment, the lubricating oil existing in the reduced peripheral gap can be smoothly moved to the inner peripheral space of the Oldham ring.

[0031] The sixth embodiment of the present invention is to form an annular groove along the recess wall surface in the scroll compressor of the third embodiment. According to this embodiment, the lubricating oil in the reduced peripheral gap can be smoothly moved to the expanded gap on the side of the Oldham ring away from the recess wall surface.

[0032] The seventh embodiment of the present invention is that, in the scroll compressor of the fourth embodiment, a plurality of connecting grooves are arranged symmetrically with respect to an imaginary X-axis line passing through a pair of fixed scroll side key portions. According to this embodiment, the lubricating oil existing in the reduced peripheral clearance can be smoothly moved to the inner peripheral space of the Oldham ring.

[0033] [Example]

[0034] A scroll compressor according to an embodiment of the present invention will be described below. However, the present invention is not limited to the following embodiment.

[0035] Figure 1 It is a longitudinal sectional view of the scroll compressor of this embodiment.

[0036] Arranged in the closed container 1 are a compression mechanism 10 for compressing refrigerant, an electric mechanism 20 for driving the compression mechanism 10 , and a main shaft 30 for operating the compression mechanism 10 by the rotation of the electric mechanism 20 .

[0037] The sealed container 1 is composed of a main body 1a formed into a cylindrical shape extending in the up-down direction, an upper cover 1c closing an upper opening of the main body 1a, and a lower cover 1b closing a lower opening of the main body 1a.

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

[0039] The compression mechanism 10 includes a fixed scroll 11 and an orbiting scroll 12 . The orbiting scroll 12 is driven to orbit by the main shaft 30 .

[0040] The electric mechanism 20 includes a stator 21 fixed to the closed 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 that supports the fixed scroll 11 and the orbiting scroll 12 is provided below the fixed scroll 11 and the orbiting scroll 12 .

[0042] The main bearing 40 is formed with a bearing portion 41 for axially supporting the main shaft 30, a boss receiving portion 42, a sealing annular recess 43, and an Oldham ring recess 45. The main bearing 40 is fixed to the closed container 1 by welding or sintering.

[0043] The fixed scroll 11 includes a disc-shaped fixed scroll end plate 11a, a fixed volute 11b erected on the fixed scroll end plate 11a, and an outer peripheral wall portion 11c erected to surround the fixed volute 11b. A discharge port 14 is formed substantially at the center of the fixed scroll end plate 11a.

[0044] The orbiting scroll 12 has a circular plate-shaped orbiting scroll end plate 12a, an orbiting scroll tooth 12b vertically arranged on the spiral tooth side end surface of the orbiting scroll end plate 12a, and a cylindrical boss portion 12c formed from the spiral tooth side end surface of the orbiting scroll end plate 12a to the opposite side.

[0045] The fixed wrap 11 b of the fixed scroll 11 and the orbiting wrap 12 b of the orbiting scroll 12 mesh with each other, and a plurality of compression chambers 15 are formed between the fixed wrap 11 b and the orbiting wrap 12 b.

[0046] The boss portion 12 c is formed substantially at the center of the orbiting scroll end plate 12 a and is accommodated in the boss accommodation portion 42 .

[0047] The main shaft 30 is formed with: a journal portion 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 a lower end portion 33 of the main shaft 30 to an upper end portion of the eccentric shaft 32. The eccentric shaft 32 is formed at the upper end of the main shaft 30, and the journal portion 31 is formed below the eccentric shaft 32.

[0048] The fixed scroll 11 is fixed to the main bearing 40 at the outer peripheral wall portion 11c using a plurality of bolts 16. On the other hand, the orbiting scroll 12 is supported on the fixed scroll 11 via an Oldham ring 17. The Oldham ring 17 for limiting the rotation of the orbiting scroll 12 is arranged in the Oldham ring recess 45 and is provided between the fixed scroll 11 and the main bearing 40. As a result, the orbiting scroll 12 performs a rotational motion relative to the fixed scroll 11 without rotating.

[0049] A lower end portion 33 of the main shaft 30 is axially supported by a sub-bearing 18 disposed at a lower portion of the closed container 1 .

[0050] An oil storage portion 4 for storing lubricating oil is formed at the bottom of the closed container 1 .

[0051] A positive displacement oil pump 5 is provided at the lower end of the main shaft 30. The oil pump 5 is arranged so that its suction port is present in the oil reservoir 4. The oil pump 5 is driven by the main shaft 30. The oil pump 5 can reliably suck up the lubricating oil in the oil reservoir 4 provided at the bottom of the closed container 1 without being affected by the pressure conditions and the operating speed, so the worry of running out of oil can be eliminated.

[0052] The lubricating oil sucked up by the oil pump 5 is supplied to the bearing of the auxiliary bearing 18 , the bearing portion 41 , the boss portion 12 c , and the upper end portion of the eccentric shaft 32 through the main shaft oil supply hole 34 formed in the main shaft 30 .

[0053] The orbiting scroll end plate 12a is provided with a first oil passage 51 and a second oil passage 52. The first oil passage 51 intermittently connects the space between the upper end of the eccentric shaft 32 and the orbiting scroll end plate 12a and the Oldham recess 45. The second oil passage 52 intermittently connects the Oldham recess 45 and the refrigerant suction space on the periphery of the orbiting scroll end plate 12a.

[0054] The space between the upper end of the eccentric shaft 32 and the orbiting scroll end plate 12a is a high-pressure space at the discharge pressure of the refrigerant, and the Oldham recess 45 is an intermediate-pressure space at a pressure lower than the discharge pressure of the refrigerant and higher than the suction pressure of the refrigerant.

[0055] Therefore, the lubricating oil in the space between the upper end of the eccentric shaft 32 and the orbiting scroll end plate 12a is supplied to the Oldham recess 45 through the first oil passage 51. The lubricating oil in the Oldham recess 45 is supplied to the refrigerant suction space on the outer periphery of the orbiting scroll end plate 12a through the second oil passage 52.

[0056] The refrigerant sucked from the refrigerant suction pipe 2 is introduced into the compression chamber 15 from the suction port 15a. The compression chamber 15 moves while reducing its volume from the outer peripheral side to the central part, and the refrigerant reaching a specified pressure in the compression chamber 15 is discharged from the discharge port 14 provided in the central part of the fixed scroll 11 to the discharge chamber 6. A discharge valve (not shown) is provided on the discharge port 14. The refrigerant reaching a specified pressure in the compression chamber 15 pushes open the discharge valve and is discharged to the discharge chamber 6. The refrigerant discharged to the discharge chamber 6 is led to the upper part of the sealed container 1, reaches the periphery of the electric mechanism part 20 through the refrigerant passage (not shown) formed in the compression mechanism part 10, and is discharged from the refrigerant discharge pipe 3.

[0057] In the scroll compressor of this embodiment, the boss housing portion 42 is a high-pressure area, and the outer periphery of the orbiting scroll 12 equipped with the Cross ring 17 is an intermediate-pressure area. The pressure of the high-pressure area and the intermediate-pressure area is used to push the orbiting scroll 12 toward the fixed scroll 11.

[0058] The eccentric shaft 32 is inserted into the boss portion 12 c via a swivel bearing so as to be rotatably driven. An oil groove 38 is formed on the outer peripheral surface of the eccentric shaft 32 .

[0059] The sealing annular recess 43 is formed on the thrust surface of the main bearing 40 that receives the thrust of the orbiting scroll end plate 12a. An annular sealing member is provided on the sealing annular recess 43. The sealing member is disposed on the outer periphery of the boss housing portion 42.

[0060] The closed container 1 is filled with the same high-pressure refrigerant as the refrigerant discharged to the discharge chamber 6, and the main shaft oil supply hole 34 is open at the upper end of the eccentric shaft 32, so the pressure of the space between the upper end of the eccentric shaft 32 and the orbiting scroll end plate 12a becomes a high-pressure area with the same pressure as the discharged refrigerant.

[0061] The lubricating oil introduced into the boss portion 12c through the main shaft oil supply hole 34 is supplied to the swivel bearing and the boss receiving portion 42 through the oil groove 38 formed on the outer peripheral surface of the eccentric shaft 32. Since a sealing member is provided on the outer periphery of the boss receiving portion 42, the boss receiving portion 42 is a high pressure area.

[0062] Figure 2 Yes means Figure 1 The stereogram of the cross slip ring shown in FIG. Figure 2 (a) represents the upper surface of the cross slip ring. Figure 2 (b) represents the lower surface of the cross slip ring.

[0063] The upper surface of the cross ring 17 has a pair of fixed scroll side key portions 17a that slide relative to the fixed scroll 11, and a pair of orbiting scroll side key portions 17b that slide relative to the orbiting scroll 12. A pair of key grooves (not shown) for sliding the fixed scroll side key portions 17a are formed on the fixed scroll end plate 11a, and a pair of key grooves (not shown) for sliding the orbiting scroll side key portions 17b are formed on the orbiting scroll end plate 12a.

[0064] An imaginary X-axis line passing through the pair of fixed scroll side key portions 17 a is orthogonal to an imaginary Y-axis line passing through the pair of orbiting scroll side key portions 17 b .

[0065] A plurality of Oldham ring thrust portions 17 c are formed on the lower surface of the Oldham ring 17 .

[0066] Figure 3 Yes means Figure 1 Figure 1 shows the main bearing of a scroll compressor. Figure 3 (a) is a three-dimensional diagram of the main bearing. Figure 3 (b) is the top view of the main bearing. Figure 3 (c) is Figure 3 (b) AA line cross-sectional view.

[0067] An Oldham recess 45 is formed on the upper surface of the main bearing 40, and an oil drain groove 60 is formed on a recess thrust surface 45a of the Oldham recess 45. The oil drain groove 60 is lower than the recess thrust surface 45a.

[0068] In this embodiment, an Oldham ring lower surface groove 61 and an annular groove 62 are provided as the oil drain groove 60. The annular groove 62 is formed on the outer periphery of the recessed thrust surface 45a. In this embodiment, the annular groove 62 is formed along the recessed wall surface 45b.

[0069] Figure 4 Yes means Figure 1 Figure 1 shows the main bearing and Oldham ring of a scroll compressor. Figure 4 (a) is a stereogram, Figure 4 (b) is a top view.

[0070] The Oldham ring 17 is arranged in the Oldham ring recess 45 .

[0071] The Oldham ring lower surface groove 61 is formed on the concave thrust surface 45a where the pair of fixed scroll side key portions 17a are located.

[0072] The groove 61 on the lower surface of the cross ring may also be a rectangular groove or an inclined groove, and the bottom of the groove may also be a rounded shape.

[0073] The radial lower surface groove width 61L of the Oldham ring lower surface groove 61 is larger than the radial fixed scroll side key portion width 17L of the Oldham ring 17 at the location of the fixed scroll side key portion 17a.

[0074] The Oldham ring 17 reciprocates relative to the main bearing 40 in the direction of the imaginary X-axis.

[0075] By setting the lower surface groove 61 of the cross slip ring, as Figure 4 As shown in (b), when the Cross ring 17 moves in the direction of arrow B, the lubricating oil existing in the reduced peripheral gap S1 on the side of the Cross ring 17 close to the recessed wall surface 45b can move to the inner peripheral space S2 of the Cross ring 17 through the lower surface groove 61 of the Cross ring.

[0076] By forming the radial lower surface groove width 61L larger than the radial fixed scroll side key portion width 17L, the lubricating oil existing in the reduced outer peripheral gap S1 can be smoothly moved to the inner peripheral space S2 of the Oldham ring 17 .

[0077] In addition, by providing the annular groove 62, as Figure 4As shown in (b), when the cross ring 17 moves in the direction of arrow B, the lubricating oil in the reduced peripheral gap S1 on the side of the cross ring 17 close to the recessed wall surface 45b can be moved through the annular groove 62 to the enlarged gap S3 on the side of the cross ring 17 away from the recessed wall surface 45b.

[0078] By forming the annular groove 62 along the recessed wall surface 45 b , the lubricating oil present in the reduced outer peripheral gap S1 can be smoothly moved to the expanded gap S3 on the side of the Oldham ring 17 away from the recessed wall surface 45 b .

[0079] In this way, by providing the oil drain groove 60 composed of at least one of the lower surface groove 61 and the annular groove 62 of the Cross ring, when the Cross ring 17 moves, the lubricating oil existing in the reduced peripheral gap S1 on the side of the Cross ring 17 close to the recessed wall surface 45b is moved through the oil drain groove 60, so that the oil compression caused by the lubricating oil existing in the reduced peripheral gap S1 can be alleviated, and the compressor input and the load on the Cross ring 17 can be reduced.

[0080] Figure 5 is a cross-sectional view showing a main bearing according to another embodiment of the present invention, Figure 5 (b) is Figure 5 (a) is an enlarged cross-sectional view of a main part.

[0081] Figure 5 The groove bottom of the shown annular groove 62 is a rounded shape. In addition, the annular groove 62 can also be a rectangular or inclined groove.

[0082] Figure 6 It is a top view of a main bearing showing still another embodiment of the present invention.

[0083] Figure 6 (a) to Figure 6 The oblique line region E shown in (c) represents the installation surface on which the Oldham ring thrust portion 17c slides.

[0084] exist Figure 6 In each of the illustrated embodiments, a connecting groove 63 is provided as the oil drain groove 60 .

[0085] The communication groove 63 is formed on the concave thrust surface 45a at a position where the pair of fixed scroll side key portions 17a are not located.

[0086] Figure 6 The connecting groove 63a shown in (a) is circular in shape. Figure 6 The connecting groove 63b shown in (b) is in a horizontally long shape. Figure 6 The communicating groove 63c shown in (c) has an elliptical groove shape.

[0087] These communication grooves 63 (63a to 63c) may be rectangular grooves or inclined grooves. The communication grooves 63 are preferably formed avoiding the installation surface (the oblique line region E) on which the Oldham ring thrust portion 17c slides.

[0088] The communication groove 63 may be formed as the oil drain groove 60 instead of the Oldham ring lower surface groove 61 and the annular groove 62 , or may be formed together with at least one of the Oldham ring lower surface groove 61 and the annular groove 62 .

[0089] By providing the connecting groove 63, as Figure 4 As shown in (b), when the Oldham ring 17 moves in the direction of arrow B, the lubricating oil existing in the reduced peripheral gap S1 on the side of the Oldham ring 17 close to the recessed wall surface 45b can move to the inner peripheral space S2 of the Oldham ring 17 through the connecting groove 63.

[0090] In addition, if Figure 6 (a) to Figure 6 As shown in (c), by arranging the plurality of communicating grooves 63 symmetrically about an imaginary X-axis line passing through the pair of fixed scroll side key portions 17a, the lubricating oil in the reduced outer peripheral gap S1 can be smoothly moved to the inner peripheral space S2 of the Oldham ring 17.

[0091] Figure 7 It is a cross-sectional view of a main bearing showing still another embodiment of the present invention.

[0092] exist Figure 7 In the illustrated embodiment, an Oldham ring lower surface groove 61 , an annular groove 62 , and a communicating groove 63 a are provided as the oil drain groove 60 .

[0093] The lower surface groove 61 and the ring groove 62 of the cross slip ring are as shown in FIG. Figure 3 As shown, the connecting groove 63a is as shown in Figure 6 As shown in (a).

[0094] In addition, Figure 7 Although the Figure 6 The circular connecting groove 63a shown in (a) may also be replaced by Figure 6 The circular connecting groove 63a shown in (a) is provided Figure 6 (b) The horizontally long connecting groove 63b or Figure 6 The elliptical connecting groove 63c shown in (c).

[0095] Industrial Applicability

[0096] The scroll compressor of the present invention can be used in refrigeration cycle devices such as hot water heating devices, air conditioning devices, water heaters or refrigerators.

[0097] Description of Reference Numerals

[0098] 1 airtight container

[0099] 1a Main cadre

[0100] 1b Lower cover

[0101] 1c Upper cover

[0102] 2 Refrigerant suction pipe

[0103] 3 Refrigerant discharge pipe

[0104] 4 Oil storage

[0105] 5 Oil pump

[0106] 6 Exhaust Chamber

[0107] 10 Compression mechanism

[0108] 11 Fixed scroll

[0109] 11a Fixed scroll end plate

[0110] 11b Fixed scroll gear

[0111] 11c Outer wall

[0112] 12 Orbiting scroll

[0113] 12a Orbiting scroll end plate

[0114] 12b Orbital scroll

[0115] 12c Boss

[0116] 14 Exhaust port

[0117] 15 Compression chamber

[0118] 15a Suction port

[0119] 16 Bolts

[0120] 17 Cross slip ring

[0121] 17a Fixed scroll side key part

[0122] 17b Orbiting scroll side key portion

[0123] 17c Cross slip ring thrust part

[0124] 17L radial fixed scroll side key width

[0125] 18 Auxiliary bearing

[0126] 20 Electric mechanism

[0127] 21 Stator

[0128] 22 Rotor

[0129] 30 Spindle

[0130] 31 Shaft neck

[0131] 32 Eccentric shaft

[0132] 33 Lower end

[0133] 34 Spindle oil supply hole

[0134] 38 Oil tank

[0135] 40 Main bearing

[0136] 41 Bearing

[0137] 42 Boss storage section

[0138] 43 Annular recess for sealing

[0139] 45 Recess for cross slip ring

[0140] 45a concave thrust surface

[0141] 45b concave wall

[0142] 51 No.1 Oil Passage

[0143] 52 No. 2 oil passage

[0144] 60 Oil drain tank

[0145] 61 Cross slip ring bottom surface groove

[0146] 61L Radial lower surface groove width

[0147] 62 Ring groove

[0148] 63, 63a, 63b, 63c connecting grooves

[0149] E Slash area

[0150] S1 Peripheral space

[0151] S2 Inner Space

[0152] S3 gap.

Claims

1. A scroll compressor, characterized in that: A compression mechanism capable of compressing refrigerant, an electric mechanism driving the compression mechanism, and a main shaft rotating under the drive of the electric mechanism to operate the compression mechanism are arranged in the sealed container. An oil storage portion is formed at the bottom of the sealed container. The compression mechanism has a fixed scroll and an orbiting scroll. The fixed scroll member comprises a circular plate-shaped fixed scroll member end plate and a fixed scroll tooth vertically arranged on the fixed scroll member end plate. The orbiting scroll comprises: a circular plate-shaped orbiting scroll end plate, an orbiting scroll tooth vertically arranged on a volute-side end surface of the orbiting scroll end plate, and a boss portion formed on the opposite side of the volute-side end surface of the orbiting scroll end plate. The fixed scroll gear and the orbiting scroll gear are meshed with each other, and a plurality of compression chambers are formed between the fixed scroll gear and the orbiting scroll gear. A main bearing capable of supporting the fixed scroll and the orbiting scroll is provided below the fixed scroll and the orbiting scroll. A cross ring is provided between the main bearing and the fixed scroll member for limiting the rotation of the orbiting scroll member. The main bearing is formed with a bearing portion for axially supporting the main shaft, a boss receiving portion for receiving the boss portion, and a recessed portion for an Oldham ring in which the Oldham ring can be disposed. An oil supply hole is formed on the main shaft from the lower end to the upper end. The lubricating oil in the oil reservoir is guided to the recessed portion for the Oldham ring via the oil supply hole. An oil drain groove is formed on a concave thrust surface of the concave portion for the Oldham ring.

2. The scroll compressor according to claim 1, characterized in that: A pair of fixed scroll side key portions slidable relative to the fixed scroll and a pair of orbiting scroll side key portions slidable relative to the orbiting scroll are provided on the upper surface of the Oldham ring. A cross ring lower surface groove is provided as the oil drain groove. The Oldham ring lower surface groove is formed on the concave thrust surface where the side key portions of the pair of fixed scroll members are located.

3. The scroll compressor according to claim 1, characterized in that: An annular groove is provided as the oil drain groove. The annular groove is formed on the outer periphery of the recessed thrust surface.

4. The scroll compressor according to claim 1, characterized in that: A pair of fixed scroll side key portions slidable relative to the fixed scroll and a pair of orbiting scroll side key portions slidable relative to the orbiting scroll are provided on the upper surface of the Oldham ring. A connecting groove is provided as the oil drain groove. The communication groove is formed on the concave thrust surface at a position where the side key portions of the pair of fixed scroll members are not located.

5. The scroll compressor according to claim 2, characterized in that: The radial lower surface groove width of the Oldham ring lower surface groove is formed to be larger than the radial fixed scroll side key portion width of the Oldham ring at a position where the fixed scroll side key portion is located.

6. The scroll compressor according to claim 3, characterized in that: The annular groove is formed along the wall surface of the recess.

7. The scroll compressor according to claim 4, characterized in that: The plurality of communication grooves are arranged symmetrically with respect to an imaginary X-axis line passing through the pair of fixed scroll side key portions.

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