Compressor

Abstract

To provide a compressor capable of suppressing wear of a sub-bearing.SOLUTION: The compressor includes a crankshaft 4, a sub bearing 9 supporting a lower part of the crankshaft 4, and an oil storage member 11 provided around the sub bearing 9 and capable of storing lubricating oil, and the sub bearing 9 includes a bearing body 91 and a bearing case 9b housing the bearing body 91, and the bearing case 9b includes a first oil supply passage 9b3 for supplying the lubricating oil stored in the oil storage member 11 to a gap between a side part of the bearing body 91 and the bearing case 9b.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a compressor. [Background technology]

[0002] Scroll-type compressors are commonly used as compressors. To prevent whirling of the crankshaft, these compressors typically have a structure in which a sub-bearing supports the lower part of the crankshaft. The sub-bearing is designed to support the centrifugal force from the crankshaft and the load caused by gas compression with the bearing case via the bearing body. Oil is only supplied to the bearing body when the lubricating oil supplied to the compressor returns to the bottom of the compressor, and this structure does not allow for stable oil supply. As a result, insufficient oil supply prevents the formation of an oil film in the bearing gap, which can lead to abnormal wear of the sub-bearing.

[0003] Patent Document 1 discloses a compressor in which a cone-shaped peripheral wall is provided above a ball bearing, which serves as a secondary bearing. By providing the cone-shaped peripheral wall, lubricating oil discharged from an oil return passage provided above the peripheral wall is stored in the peripheral wall. The stored lubricating oil is then supplied to the ball bearing, suppressing abnormal wear of the ball bearing. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-21731 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the auxiliary bearing described in Patent Document 1, lubricating oil is supplied from the top of the ball, which is the bearing body, so it is difficult for lubricating oil to be supplied to the side of the bearing body, which is subjected to a heavy load, and there is a risk of wear on the side of the bearing body.

[0006] An object of the present disclosure is to provide a compressor that can suppress wear of the auxiliary bearing. [Means for solving the problem]

[0007] The compressor of the present disclosure comprises a crankshaft, an auxiliary bearing that supports a lower part of the crankshaft, and an oil storage member that is provided around the auxiliary bearing and is capable of storing lubricating oil, the auxiliary bearing comprising a bearing body and a bearing case that houses the bearing body, and the bearing case comprising a first oil supply passage for supplying the lubricating oil stored in the oil storage member to a gap between the side of the bearing body and the bearing case. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a vertical cross-sectional view of a compressor according to a first embodiment. [Figure 2] FIG. 2 is a partially enlarged view of FIG. [Figure 3] FIG. 3 is a view corresponding to FIG. 2 of a compressor according to the second embodiment. [Figure 4] FIG. 4 is a view corresponding to FIG. 2, showing a modified example of the compressor according to the embodiment. [Figure 5] FIG. 5 is a view corresponding to FIG. 2, showing a modified example of the compressor according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) First, a first embodiment of a compressor 100 according to the present disclosure will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a vertical cross-sectional view of the compressor 100 according to the first embodiment, and Fig. 2 is a partially enlarged view of Fig. 1.

[0010] 1, the compressor 100 is a scroll compressor configured to be able to compress a gaseous refrigerant. The compressor 100 includes a sealed container 1, a compression mechanism 2, a frame 3, a crankshaft 4 (drive shaft), a main bearing 5, an orbiting bearing 6, an electric motor 7, an Oldham ring 8, an auxiliary bearing 9, a support member 10 (also referred to as a subframe 10), and an oil storage member 11.

[0011] The sealed container 1 is a cylindrical container that houses the electric motor 7, crankshaft 4, compression mechanism 2, etc., and is substantially sealed. Lubricating oil is sealed in the sealed container 1 to enhance the lubrication of the compressor 100, and the lubricating oil is stored as an oil reservoir M at the bottom of the sealed container 1.

[0012] The sealed container 1 includes a cylindrical chamber 1a, a cover chamber 1b welded to the top of the cylindrical chamber 1a, and a bottom chamber 1c welded to the bottom of the cylindrical chamber 1a.

[0013] An intake pipe (not shown) is inserted and fixed into the cover chamber 1b of the sealed container 1. The intake pipe is a pipe that guides the refrigerant to the compression mechanism 2. Furthermore, an exhaust pipe (not shown) is inserted and fixed into the cylindrical chamber 1a of the sealed container 1. The exhaust pipe is a pipe that guides the refrigerant compressed in the compression mechanism 2 to the outside of the compressor 100.

[0014] The compression mechanism 2 is a mechanism that compresses the refrigerant in accordance with the rotation of the crankshaft 4. The compression mechanism 2 includes a fixed scroll 21 and an orbiting scroll 22, and is disposed in the upper space within the sealed container 1.

[0015] The fixed scroll 21 is a fixed member fixed within the sealed container 1. The fixed scroll 21 includes a thick, disk-shaped base plate 21a and a spiral wrap 21b standing on the underside of the base plate 21a. A suction chamber (not shown) is provided near the periphery of the base plate 21a to which the refrigerant is introduced via a suction pipe.

[0016] The orbiting scroll 22 is a moving member that forms a compression chamber C between itself and the fixed scroll 21 as it orbits. The orbiting scroll 22 includes a disk-shaped base plate 22a, a spiral wrap 22b standing on the upper side of the base plate 22a, and a boss portion 22c that is fitted onto the upper end of the crankshaft 4. The wrap 22b extends above the base plate 22a, while the boss portion 22c extends below the base plate 22a.

[0017] A predetermined compression chamber C is formed between the spiral wrap 21b of the fixed scroll 21 and the spiral wrap 22b of the orbiting scroll 22. The compression chamber C is a space for compressing a gaseous refrigerant, and is formed on the outer and inner sides of the wrap 22b of the orbiting scroll 22. A discharge port is provided near the center of the base plate 21a of the fixed scroll 21, through which the refrigerant compressed in the compression chamber C is guided to an upper space in the sealed container 1.

[0018] The frame 3 is a member that supports the orbiting scroll 22 and also fixes the main bearing 5. The frame 3 has a roughly rotationally symmetrical shape and is fixed to the lower side of the fixed scroll 21. The frame 3 is provided with a hole 31 through which the crankshaft 4 is inserted.

[0019] The crankshaft 4 is a shaft that rotates integrally with the rotor 7b of the electric motor 7 and extends in the vertical direction. The crankshaft 4 is fixed coaxially to the rotor 7b of the electric motor 7. The upper part of the crankshaft 4 is supported by a main bearing 5 and an orbiting bearing 6, and the lower part of the crankshaft 4 is supported by an auxiliary bearing 9.

[0020] A first shaft-side oil supply passage 41 through which lubricating oil flows is provided in the vertical direction inside the crankshaft 4, and an oil supply pump 12 is attached to the lower end of the crankshaft 4. When the crankshaft 4 rotates, the pumping action of this oil supply pump 12 draws up lubricating oil from an oil sump M at the bottom of the sealed container 1, and the oil flows through the first shaft-side oil supply passage 41 to be supplied to the compression mechanism 2, as well as to the main bearing 5, slewing bearing 6, sub-bearing 9, oil storage member 11, and the like. The lubricating oil then returns to the oil sump M at the bottom of the sealed container 1.

[0021] A second-shaft-side oil supply passage (not shown) is provided inside the crankshaft 4 to supply lubricating oil to the gap between the sub-bearing 9 and the crankshaft 4. The second-shaft-side oil supply passage extends from the first-shaft-side oil supply passage 41 toward the radially outer side of the crankshaft 4, and connects the first-shaft-side oil supply passage 41 with the gap between the sub-bearing 9 and the crankshaft 4. As a result, the lubricating oil flowing through the first-shaft-side oil supply passage 41 flows into the second-shaft-side oil supply passage by centrifugal force, and the lubricating oil is supplied to the gap between the sub-bearing 9 (the inner circumferential portion of a bearing body 91 described later) and the crankshaft 4.

[0022] The main bearing 5 rotatably supports the upper part of the crankshaft 4 and is fixed to a hole 31 in the frame 3. The slewing bearing 6 rotatably supports the upper part of the crankshaft 4 and is fixed to the inner peripheral wall of the boss portion 22c.

[0023] The electric motor 7 is a drive source that rotates the crankshaft 4 and is provided below the frame 3. The electric motor 7 includes a stator 7a and a rotor 7b. The stator 7a is a cylindrical member made of laminated electromagnetic steel sheets and is fixed to the inner peripheral wall of the cylindrical chamber 1a. The rotor 7b is a cylindrical member made of laminated electromagnetic steel sheets and is disposed radially inward of the stator 7a. The rotor 7b is fixed to the crankshaft 4 by press-fitting or the like.

[0024] When the orbiting scroll 22 orbits due to the driving of the electric motor 7, the volume of the compression chambers C formed one after another decreases, compressing the gaseous refrigerant. The compressed refrigerant is discharged into the upper space in the sealed container 1 through the discharge port of the fixed scroll 21, and is then guided to the lower side of the compression mechanism 2 through the gap between the frame 3 and the cylindrical chamber 1a. Therefore, the upper and lower spaces of the compression mechanism 2 are each filled with gaseous refrigerant at a pressure approximately equal to the discharge pressure. The refrigerant guided to the lower side of the compression mechanism 2 is guided to a condenser (not shown) via a discharge pipe or the like, and circulates in a predetermined refrigeration cycle.

[0025] The Oldham ring 8 is an annular member that receives the rotation of the crankshaft 4 and causes the orbiting scroll 22 to orbit without rotating on its axis. The Oldham ring 8 is provided between the orbiting scroll 22 and the frame 3.

[0026] Fig. 2 is an enlarged view of the sub-bearing 9 in Fig. 1. As shown in Fig. 2, the sub-bearing 9 rotatably supports the lower part of the crankshaft 4. The sub-bearing 9 is, for example, a rolling bearing or a spherical bearing. In this embodiment, the sub-bearing 9 is a spherical bearing.

[0027] The sub-bearing 9 includes a bearing body 91 and a bearing case 92 that houses the bearing body 91. The bearing body 91 is, for example, a ball made of metal (iron, stainless steel, etc.), and is provided between the bearing case 92 and the crankshaft 4. The bearing case 92 is, for example, formed in an annular shape, and is provided so as to surround the outer periphery of the bearing body 91.

[0028] The outer circumferential portion (side portion 911) of the bearing body 91 is formed, for example, into a spherical shape that is convex outward (the side away from the crankshaft 4), and the inner circumferential portion 924 of the bearing case 92 is formed into a spherical shape that is concave outward. As a result, the bearing body 91 and the bearing case 92 are in spherical contact.

[0029] The oil reservoir 11 is provided around the sub-bearing 9 and is configured to be able to store lubricating oil. In this embodiment, the oil reservoir 11 can store lubricating oil together with the sub-bearing 9. Specifically, the oil reservoir 11 is formed in a bowl shape with a hole 112 formed in a bottom 111, and a bottom (lower part) 921 of the bearing case 92 is fixed (for example, welded) to cover the hole 112. As a result, the bearing case 92 and the oil reservoir 11 form an annular oil reservoir 11a, and the lubricating oil can be stored in the oil reservoir 11a. The inner periphery of the oil reservoir 11a is formed by the outer periphery 922 of the bearing case 92, and the outer periphery of the oil reservoir 11a is formed by the outer periphery 113 of the oil reservoir 11.

[0030] The hole 112 of the oil storage member 11 is formed, for example, in a circular shape. The center of the hole 112 substantially coincides with the center of the sub-bearing 9. The outer periphery 113 of the oil storage member 11 is inclined upward toward the outside (the side opposite the sub-bearing 9). The outer periphery 113 is curved so as to be convex toward the inside (the sub-bearing 9 side).

[0031] The bearing case 92 is provided with a first oil supply passage 923 for supplying lubricating oil stored in the oil storage member 11 to the gap between the side portion 911 of the bearing body 91 and the inner periphery 924 of the bearing case 92. With this configuration, a film of lubricating oil can be provided on the side portion 911 of the bearing body 91, which is the part of the sub-bearing 9 that is subjected to the larger load, thereby suppressing wear of the sub-bearing 9. Furthermore, even when the oil level in the oil reservoir M (see FIG. 1) is low and the sub-bearing 9 is not immersed in lubricating oil, lubricating oil can be supplied to the bearing gap, thereby suppressing wear of the sub-bearing 9. This makes it possible to provide a highly reliable compressor.

[0032] The first oil supply passage 923 extends from the outer circumferential portion 922 of the bearing case 92 toward the inner circumferential portion 924. As a result, lubricating oil stored in the oil reservoir 11a flows through the first oil supply passage 923 and is supplied to the bearing gap in the side portion 911 of the bearing body 91. In this embodiment, the first oil supply passage 923 is provided in the center in the height direction of the bearing case 92 and extends linearly along the horizontal direction, but is not limited to this. For example, the first oil supply passage 923 may be provided on the lower side (bottom 921 side) of the bearing case 92, or may extend inward (toward the bearing body 91) at an incline downward. Although only one first oil supply passage 923 is provided in FIG. 2, multiple first oil supply passages 923 may be provided.

[0033] An opening 11b is provided at the top of the oil storage member 11, and the height of the outer peripheral portion 113 of the oil storage member 11 is greater than the height of the first oil supply passage 923. This allows the lubricating oil stored in the oil storage portion 11a to flow through the first oil supply passage 923. The lubricating oil that overflows from the oil storage portion 11a returns to the oil reservoir M (see FIG. 1) from the upper end of the outer peripheral portion 113.

[0034] The height of the outer circumferential portion 113 is preferably greater than the height of the bearing case 92. That is, the outer circumferential portion 113 of the oil storage member 11 preferably extends to a position higher than the bearing case 92. With this configuration, when lubricating oil is stored in the oil storage member 11, the lubricating oil can be supplied from above the bearing case 92 to the gap between the bearing body 91 and the bearing case 92, and wear of the sub-bearing 9 can be suppressed.

[0035] The support member 10 is a member that supports the crankshaft 4 via the auxiliary bearing 9. The support member 10 is formed in an annular shape in a plan view. The bearing case 92 (upper part 925) is fixed (for example, welded) to the inner peripheral part 101 (lower part) of the support member 10, and the outer peripheral part 102 of the support member 10 is fixed (for example, welded) to the cylindrical chamber 1a of FIG. 1. The inner peripheral part 101 is provided along the horizontal direction. A part of the outer peripheral part 102 is provided along the horizontal direction, and the other part of the outer peripheral part 102 is provided along the vertical direction. In other words, the outer peripheral part 102 is formed with an L-shaped cross section. A notch 102a is provided in the outer peripheral part 102.

[0036] The support member 10 has an inclined portion 103 that slopes downward from the outer circumferential portion 102 toward the inner circumferential portion 101. This allows the lubricating oil that has flowed down from the gap between the electric motor 7 and the cylindrical chamber 1a to flow along the inclined portion 103 toward the auxiliary bearing 9. The inclined portion 103 is provided between the inner circumferential portion 101 and the outer circumferential portion 102.

[0037] The support member 10 preferably has a first through hole 104 provided at a position overlapping with the oil reservoir 11a of the oil reservoir member 11 in plan view. With this configuration, the lubricating oil that has flowed along the support member 10 (inclined portion 103) is stored in the oil reservoir 11a from the first through hole 104. This allows the lubricating oil stored in the oil reservoir 11a to be supplied to the gap between the bearing body 91 and the bearing case 92, making it possible to suppress wear of the sub-bearing 9. An overlapping position includes not only the entire first through hole 104 overlapping with the oil reservoir 11a in plan view, but also at least a portion of the first through hole 104 overlapping with the oil reservoir 11a.

[0038] The first through hole 104 extends in the vertical direction. It is preferable that at least one or more (one or more) first through holes 104 are provided. For example, a plurality of first through holes 104 are provided, and are arranged in an annular shape so as to substantially coincide with the center of the support member 10. It is preferable that the first through hole 104 is provided on the inner circumferential portion 101 side. The first through hole 104 is provided, for example, in the lower part of the inclined portion 103.

[0039] The bearing case 92 preferably has a second oil supply passage 926 for supplying oil from an upper portion 925 thereof to a gap between (a side portion 911 of) the bearing body 91 and (an inner peripheral portion 924 of) the bearing case 92, and the support member 10 preferably has a second through hole 105 provided at a position overlapping with the second oil supply passage 926 in a plan view. According to this configuration, the lubricating oil that has flowed along the support member 10 passes through the second through hole 105 and is supplied from the second oil supply passage 926 to the gap between the bearing body 91 and the bearing case 92. This makes it possible to further suppress wear of the sub-bearing 9. The overlapping position includes not only the entire second oil supply passage 926 overlapping with the second through hole 105 in a plan view, but also at least a portion of the second oil supply passage 926 overlapping with the second through hole 105.

[0040] The second oil supply passage 926 extends in the up-down direction. The second oil supply passage 926 is provided between the side portion 911 of the bearing body 91 and the inner circumferential portion 924 of the bearing case 92. It is preferable that one or more second oil supply passages 926 are provided. In this embodiment, the second oil supply passage 926 is a groove provided in the inner circumferential portion 924, but is not limited to this. For example, the second oil supply passage 926 may be a through-hole extending from the upper portion 925 to the first oil supply passage 923.

[0041] The second through hole 105 extends in the up-down direction. It is preferable that at least one or more (one or more) second through holes 105 are provided. The second through hole 105 is, for example, a single through hole provided in the center of the support member 10, and the diameter of the second through hole 105 is larger than the outer diameter of the bearing body 91. The second through hole 105 is, for example, provided further inward than the inclined portion 103 or the inner peripheral portion 101. Note that the second through hole 105 may be, for example, a plurality of through holes provided in the inner peripheral portion 101.

[0042] (Modification of the first embodiment) In the above embodiment, the sub-bearing 9 is a spherical bearing, but is not limited to this. For example, the sub-bearing 9 may be a rolling bearing (e.g., a ball bearing or a roller bearing). In such an example, the rolling elements, such as balls or cylinders, correspond to the bearing body, and the outer ring corresponds to the bearing case. It is also preferable that the inner ring be provided with an oil supply passage such as the first oil supply passage 923 or the second oil supply passage 926 shown in FIG. 2.

[0043] In the above embodiment, the oil reservoir 11a is formed by the oil reservoir member 11 and the bearing case 92, but this is not limiting. For example, the oil reservoir 11a may be formed only by the oil reservoir member 11. That is, the oil reservoir member 11 may have a cylindrical inner peripheral portion extending upward from the bottom portion 111. In such an example, the height of the inner peripheral portion is smaller than the height of the first oil supply passage 923. Alternatively, the inner peripheral portion may have a communication hole communicating with the first oil supply passage 923.

[0044] (Second embodiment) Next, a second embodiment of the compressor of the present disclosure will be described with reference to Fig. 3. The second embodiment can be configured similarly to the first embodiment except for the configuration described below, so commonalities will be omitted and differences will be mainly described. Components already described in the first embodiment will be assigned the same reference numerals and redundant description will be omitted. Fig. 3 is a view of the compressor according to the second embodiment, corresponding to Fig. 2.

[0045] In the second embodiment, the oil storage member 11 is fixed to the cylindrical chamber 1a in Fig. 1 and supports the crankshaft 4 via the sub-bearing 9. With this configuration, the oil storage member 11 also functions as a support member for supporting the sub-bearing 9, thereby reducing the number of parts in the compressor. The outer diameter of the oil storage member 11 in the second embodiment is larger than the outer diameter of the oil storage member in the first embodiment.

[0046] The oil storage member 11 has a hanging part 114 for fixing (for example, by welding) to the cylindrical chamber 1a in Fig. 1, and an overflow hole 115 for discharging the stored lubricating oil. The hanging part 114 extends downward from the outer end of the outer circumferential part 113. The hanging part 114 has a notch 116.

[0047] The overflow holes 115 extend in the vertical direction. A plurality of overflow holes 115 are provided in the upper part of the outer circumferential portion 113. The plurality of overflow holes 115 are arranged in an annular shape so as to substantially coincide with the center of the oil storage member 11. The overflow holes 115 are preferably provided at a position higher than the first oil supply passage 923, and more preferably at a position higher than the bearing case 92.

[0048] (Modification of the second embodiment)

[0049] In the above embodiment, the bearing case 92 is fixed to the oil storage member 11 by welding or the like, but this is not limiting. For example, as shown in Fig. 4, the bearing case 92 may be fixed to the oil storage member 11 with a bolt B. This makes it easier to align the auxiliary bearing 9 and the oil storage member 11. In such an example, it is preferable that the female thread portion 927 of the bearing case 92 that screws onto the bolt B is not connected to the first oil supply passage 923 shown in Fig. 3. Fig. 4 shows a state rotated around the crankshaft 4 with respect to Fig. 3.

[0050] In the above embodiment, the bearing case 92 is fixed onto the bottom 111 of the oil storage member 11, but this is not limiting. For example, as shown in Fig. 5, the bearing case 92 may include a flange portion 928 extending outward from the bottom portion 921, and the bottom portion 111 of the oil storage member 11 may be fixed (for example, by welding) onto the flange portion 928. This makes it easier to align the auxiliary bearing 9 and the oil storage member 11. In such an example, the first oil supply passage 923 is provided above the bottom portion 921 of the oil storage member 11.

[0051] [1] As described above, the compressor 100 comprises the crankshaft 4, the auxiliary bearing 9 that supports the lower part of the crankshaft 4, and the oil storage member 11 that is arranged around the auxiliary bearing 9 and is capable of storing lubricating oil. The auxiliary bearing 9 comprises a bearing body 91 and a bearing case 92 in which the bearing body 91 is housed. The bearing case 92 comprises a first oil supply passage 923 for supplying the lubricating oil stored in the oil storage member 11 to the gap between the side part 911 of the bearing body 91 and the bearing case 92.

[0052] According to this configuration, a film of lubricating oil can be provided on the side portion 911 of the bearing body 91, which is subjected to a large load in the sub-bearing 9, and wear of the sub-bearing 9 can be suppressed.

[0053] [2] The compressor 100 described in [1] above may be configured to include a sealed container 1 having a cylindrical chamber 1a, and a support member 10 provided above an oil storage member 11 and supporting the crankshaft 4 via a sub-bearing 9, and the support member 10 may have a first through hole 104 provided at a position overlapping the oil storage section 11a of the oil storage member 11 in a plan view.

[0054] With this configuration, the lubricating oil that flows along the support member 10 is stored in the oil reservoir 11a from the first through-hole 104. This allows the lubricating oil stored in the oil reservoir 11a to be supplied to the gap between the bearing body 91 and the bearing case 92, making it possible to suppress wear of the sub-bearing 9.

[0055] [3] In the compressor 100 described in [1] or [2] above, the bearing case 92 may be configured to have a second oil supply passage 926 for supplying oil from an upper portion 925 thereof to a gap between the bearing body 91 and the bearing case 92, and the support member 10 may be configured to have a second through hole 105 provided at a position overlapping with the second oil supply passage 926 in a plan view.

[0056] With this configuration, the lubricating oil that has flowed along the support member 10 passes through the second through hole 105 and is supplied from the second oil supply passage 926 to the gap between the bearing body 91 and the bearing case 92. This makes it possible to further suppress wear of the sub-bearing 9.

[0057] [4] The compressor 100 described in [1] above may be configured to include a sealed container 1 having a cylindrical chamber 1a, and the oil storage member 11 may be fixed to the cylindrical chamber 1a and support the crankshaft 4 via a sub-bearing 9.

[0058] According to this configuration, the oil storage member 11 also functions as a support member that supports the sub-bearing 9, and the number of parts of the compressor 100 can be reduced.

[0059] [5] In the compressor 100 according to any one of the above [1] to [4], the bearing body 91 is preferably a metal ball.

[0060] [6] In the compressor 100 according to any one of the above [1] to [5], the outer circumferential portion 113 of the oil storage member 11 preferably extends to a position higher than the bearing case 92.

[0061] With this configuration, when lubricating oil is stored in the oil storage member 11, the lubricating oil can be supplied from above the bearing case 92 to the gap between the bearing body 91 and the bearing case 92, thereby suppressing wear of the auxiliary bearing 9.

[0062] The compressor is not limited to the configuration of the embodiment described above, and is not limited to the effects and advantages described above. Furthermore, various modifications may be made to the compressor without departing from the spirit and scope of the present invention. For example, it is possible to select one or more of the configurations, methods, etc. of the various modifications described above and employ them in the configurations, methods, etc. of the embodiment described above. [Explanation of symbols]

[0063] 1: sealed container, 1a: cylindrical chamber, 1b: lid chamber, 1c: bottom chamber, 2: compression mechanism, 21: fixed scroll, 21a: base plate, 21b: wrap, 22: orbiting scroll, 22a: base plate, 22b: wrap, 22c: boss portion, 3: frame, 31: hole, 4: crankshaft, 41: first shaft side oil supply passage, 5: main bearing, 6: orbiting bearing, 7: electric motor, 7a: stator, 7b: rotor, 8: Oldham ring, 9: auxiliary bearing, 91: bearing body, 911: side portion, 92: bearing case, 921: bottom portion, 922: outer periphery, 923: first oil supply passage, 924: inner periphery, 925: upper part, 926: second oil supply passage, 927: female thread portion, 928: flange portion, 10: support member, 101: inner periphery, 102: outer periphery, 102a: notch portion, 103: inclined portion, 104: first through hole, 105: second through hole, 11: oil storage member, 11a: oil storage portion, 11b: opening, 111: bottom portion, 112: hole, 113: outer periphery, 114: hanging portion, 115: overflow hole, 116: notch portion, 12: oil supply pump, 100: compressor

Claims

1. The crankshaft, a secondary bearing supporting a lower portion of the crankshaft; an oil storage member provided around the auxiliary bearing and capable of storing lubricating oil, The auxiliary bearing includes a bearing body and a bearing case in which the bearing body is housed, The bearing case has a first oil supply passage for supplying lubricating oil stored in the oil storage member to a gap between a side portion of the bearing body and the bearing case.

2. a sealed container having a cylindrical chamber; a support member provided above the oil storage member and supporting the crankshaft via the auxiliary bearing, The compressor according to claim 1 , wherein the support member includes a first through-hole provided at a position overlapping the oil reservoir portion of the oil reservoir member in a plan view.

3. the bearing case is provided with a second oil supply passage for supplying oil from an upper portion thereof to a gap between the bearing body and the bearing case, The compressor according to claim 2 , wherein the support member includes a second through-hole provided at a position overlapping with the second oil supply passage in a plan view.

4. a sealed container having a cylindrical chamber; The compressor according to claim 1 , wherein the oil storage member is fixed to the cylindrical chamber and supports the crankshaft via the auxiliary bearing.

5. The compressor according to claim 1 , wherein the bearing body is a metal ball.

6. The compressor according to any one of claims 1 to 5, wherein an outer circumferential portion of the oil storage member extends to a position higher than the bearing case.

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