CN213981182U

CN213981182U - Movable scroll assembly and scroll compressor comprising same

Info

Publication number: CN213981182U
Application number: CN202022181014.1U
Authority: CN
Inventors: 胡小伟; 倪凌枫
Original assignee: Emerson Climate Technologies Suzhou Co Ltd
Current assignee: Copeland Suzhou Co Ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-08-17
Anticipated expiration: 2030-09-28

Abstract

The application relates to move vortex subassembly and scroll compressor, move the vortex subassembly and include: and an orbiting scroll including an orbiting scroll end plate and a hub portion including a hub portion circumferential wall defining an inner space and an outer space respectively radially inside and outside the hub portion circumferential wall, a region of the inner space adjacent to the orbiting scroll end plate being provided as an oil storage region adapted to store lubricating oil, the orbiting scroll assembly being provided with at least one oil delivery passage penetrating the hub portion circumferential wall and the bearing circumferential wall, the oil delivery passage having an inner orifice opened at a first inner circumferential wall surface of the bearing circumferential wall, the oil delivery passage being adapted to guide the lubricating oil flowing along the first inner circumferential wall surface from the oil storage region to the outer space. Move vortex subassembly and scroll compressor and can show and improve the volume of supplying lubricating oil to the compression mechanism inside and can ensure that sufficient lubricating oil in the compression mechanism carries under low rotational speed operating mode, simple structure easily realizes, has higher cost-effectiveness.

Description

Movable scroll assembly and scroll compressor comprising same

Technical Field

The utility model relates to a move vortex subassembly and include its scroll compressor.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Compressors (e.g., scroll compressors) may be used in, for example, refrigeration systems, air conditioning systems, and heat pump systems. The scroll compressor includes: a compression mechanism including a non-orbiting scroll and an orbiting scroll, the non-orbiting and orbiting scroll wraps being engaged with each other to define a series of working fluid receiving chambers to compress a working fluid; and the main bearing seat supports the movable scroll and is fixedly connected with the fixed scroll, the movable scroll is positioned between the main bearing seat and the fixed scroll and can perform orbiting motion relative to the fixed scroll, and during the operation, as the movable scroll performs orbiting relative motion relative to the fixed scroll, relative friction motion exists between contact surfaces of contact parts (the side surface of the movable scroll end plate facing the fixed scroll is abutted against the end surface of the circumferential wall of the fixed scroll, the movable scroll is engaged with the fixed scroll, and the end surfaces of the movable scroll and the fixed scroll are respectively abutted against the fixed scroll end plate and the movable scroll end plate) of the movable scroll and the fixed scroll, and more heat is generated, so that the normal operation and the service life of the fixed scroll and the movable scroll are not facilitated.

For this reason, the prior art has adopted a corresponding technical solution to supply the lubricating oil to the compression mechanism to solve the above technical problem, but there is still a problem that the lubricating oil supplied to the compression mechanism may be insufficient when the compressor is operated at a low speed, thereby possibly affecting the operating efficiency and the life of the compressor.

Accordingly, there is a need to provide an orbiting scroll assembly and a scroll compressor which are improved in the above-mentioned respects.

Disclosure of Invention

An object of the utility model is to provide a can carry out modified scroll compressor in the aspect of supplying lubricating oil to the compression mechanism.

An aspect of the utility model provides a move vortex subassembly, include:

an orbiting scroll including an orbiting scroll end plate, an orbiting scroll wrap extending from a first side surface of the orbiting scroll end plate, and a boss portion extending from a second side surface of the orbiting scroll end plate, the boss portion including a boss circumferential wall, an inner space and an outer space being defined radially inside and radially outside the boss circumferential wall, respectively, a region of the inner space adjacent to the orbiting scroll end plate being provided as an oil storage region adapted to store lubricating oil; and

a drive bearing including a bearing circumferential wall joined to the hub circumferential wall in the inner space,

characterized in that the orbiting scroll assembly is provided with at least one oil delivery passage penetrating the hub circumferential wall and the bearing circumferential wall, the oil delivery passage having an inner orifice opening at a first inner circumferential wall surface of the bearing circumferential wall, the oil delivery passage being adapted to guide the lubricating oil flowing along the first inner circumferential wall surface from the oil storage region to the outer side space.

The utility model relates to an above-mentioned oil transportation route of this kind of configuration aims at utilizing better along the first interior wall surface flows lubricating oil to guarantee the stability of lubricating oil supply volume. This improvement is a significant technical advance. Further, since the lubricating oil can be guided to the space outside the boss portion after lubricating a large area in the axial direction of the drive bearing or the like, the utilization efficiency of the lubricating oil can be remarkably improved.

According to a preferred embodiment of the present invention, the bearing circumferential wall has a first end face adjacent to the orbiting scroll end plate and a second end face opposite to the first end face, the inner orifice is located close to the second end face of the bearing circumferential wall.

According to a preferred embodiment of the present invention, the boss portion is provided at an end remote from the orbiting scroll end plate as a flange portion protruding radially outward, and the oil delivery passage is positioned to abut the flange portion in the axial direction.

According to a preferred embodiment of the present invention, the orbiting scroll assembly further includes a bush fitted in the inner space to the first inner peripheral wall surface in a manner rotatable with respect to the drive bearing, the outer peripheral wall surface of the bush being provided with an oil groove adapted to guide the lubricating oil in the oil storage region to the oil delivery passage.

According to a preferred embodiment of the present invention, the bushing has a first end face adjacent to the orbiting scroll end plate, the first end of the oil groove extends to the first end face of the bushing so as to communicate with the oil storage region, the second end of the oil groove communicates with the inner orifice.

According to a preferred embodiment of the present invention, the oil groove is provided only in a part of the outer peripheral wall surface of the bush in the circumferential direction, so that the oil groove is intermittently and directly communicated with the inner bore when the bush rotates relative to the drive bearing, thereby preventing excessive lubricating oil from entering the compression mechanism to reduce the working fluid compression efficiency and preventing excessive lubricating oil from being brought into the subsequent application apparatus.

According to a preferred embodiment of the present invention, the oil groove extends in the axial direction and penetrates through the outer peripheral wall surface of the bushing.

According to the utility model discloses a preferred embodiment, move the vortex subassembly and be provided with and run through move the additional oil transportation route of vortex end plate, thereby additional oil transportation route with the regional direct intercommunication of oil storage is suitable for with lubricating oil in the oil storage region is directed move the first side of vortex end plate.

According to a preferred embodiment of the present invention, a circumferential ring groove is provided at an end portion of the orbiting scroll end plate which is distant from the outer circumferential wall surface of the bushing and/or the first inner circumferential wall surface.

According to a preferred embodiment of the present invention, the axial edge of the circumferential ring groove close to the orbiting scroll end plate is flush with or higher in the axial direction than the inner orifice.

Another aspect of the present invention provides a scroll compressor, wherein the scroll compressor comprises the movable scroll assembly as described above.

According to the preferred embodiment of the present invention, the scroll compressor is a high-pressure side scroll compressor in which a motor of the scroll compressor is under an exhaust pressure.

According to a preferred embodiment of the present invention, the scroll compressor comprises a non-orbiting scroll, which constitutes the compression mechanism with the orbiting scroll and cooperates to define a series of working fluid receiving chambers, the scroll compressor being provided with a back pressure chamber having a medium pressure, the back pressure chamber being at least a part of the outer space and being adapted to push the orbiting scroll towards the non-orbiting scroll.

According to a preferred embodiment of the present invention, a back pressure hole is provided in the movable scroll end plate to communicate the back pressure chamber with the intermediate compression chambers in the series of working fluid receiving chambers, and lubricating oil guided to the back pressure chamber via the oil delivery passage is adapted to be supplied to the inside of the compression mechanism through the back pressure hole and/or a gap between the first side surface of the movable scroll end plate and the corresponding contact surface of the fixed scroll, and the drive shaft of the scroll compressor has: a first shaft end fitted in a bushing of the orbiting scroll assembly; a second shaft end connected to a source of bottom lubricating oil of the scroll compressor; and an internal oil passage adapted to supply the lubricating oil in the bottom lubricating oil source to the oil reservoir region.

To sum up, according to the utility model discloses a scroll compressor provides following beneficial technological effect at least: according to the utility model discloses a move vortex subassembly and scroll compressor and can show the volume that improves to the inside supply lubricating oil of compression mechanism to can still ensure under the low rotational speed operating mode and carry to the inside sufficient lubricating oil of compression mechanism, and simple structure easily realizes, has higher cost-effectiveness.

Drawings

The foregoing and additional features and characteristics of the present invention will become more apparent from the following detailed description, taken with reference to the accompanying drawings, which are given by way of example only and which are not necessarily drawn to scale. Like reference numerals are used to indicate like parts in the accompanying drawings, in which:

FIG. 1 is a schematic longitudinal cross-sectional view of a scroll compressor according to an embodiment of the present invention;

fig. 2 and 3 show a first embodiment of the present invention; wherein FIG. 2 is an enlarged partial longitudinal cross-sectional view of an orbiting scroll assembly of the scroll compressor of FIG. 1; FIG. 3 is a longitudinal cross-sectional view of an orbiting scroll assembly of the scroll compressor of FIG. 1;

fig. 4a, 4b and 4c show a second embodiment of the invention; wherein fig. 4a shows a perspective view of a bushing of a scroll compressor of a second embodiment; FIG. 4b shows a cross-sectional schematic view of the drive shaft of the scroll compressor of the second embodiment in a first state with the hub portion fitted together; FIG. 4c shows a cross-sectional schematic view of the drive shaft of the scroll compressor of the second embodiment in a second condition with the hub portion fitted together; and

fig. 5 and 6 show a third embodiment of the present invention; wherein, fig. 5 shows a perspective view of a bushing of the scroll compressor of the third embodiment; FIG. 6 illustrates an enlarged partial longitudinal cross-sectional view of the orbiting scroll assembly of the scroll compressor of the third embodiment.

Detailed Description

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

In the exemplary embodiments described below, the scroll compressor is illustratively shown as a vertical high side scroll compressor. However, the scroll compressor according to the present invention is not limited to this type, and may be any suitable type of scroll compressor, for example, a horizontal high-pressure side scroll compressor, a vertical or horizontal low-pressure side scroll compressor, etc., as long as the scroll compressor to which the technical solution in the scope covered by the present invention is applied.

Fig. 1 shows a longitudinal sectional schematic view of a scroll compressor 1 according to the present invention. First, the overall structure of the scroll compressor 1 according to the present invention is described schematically with reference to fig. 1.

As shown in fig. 1, the scroll compressor 1 includes a substantially cylindrical housing 12, an electric motor (including a stator 14 and a rotor 15), a drive shaft 16, a main bearing housing 11, an orbiting scroll 24, and a non-orbiting scroll 22. Wherein the orbiting scroll 24 and the drive shaft 16 and their associated accessories constitute an orbiting scroll assembly according to the present invention; the orbiting scroll 24 and the non-orbiting scroll 22 constitute a compression mechanism CM adapted to compress a working fluid (e.g., a refrigerant), wherein the non-orbiting scroll 22 includes a non-orbiting scroll end plate 221, a non-orbiting scroll wrap 222, and a discharge port 220 at the center of the non-orbiting scroll; orbiting scroll 24 includes an orbiting scroll end plate 241, an orbiting scroll wrap 242 extending from a first side surface of the orbiting scroll end plate 241, and a boss G extending from a second side surface of the orbiting scroll end plate 241, and one end of the boss G remote from the orbiting scroll end plate 241 is provided as a flange portion G0 protruding radially outward. Defined within the compression mechanism CM are an open suction chamber in fluid communication with the inlet 130 of the compression mechanism CM, and a closed series of compression chambers formed by the engagement of the non-orbiting scroll wrap 222 with the orbiting scroll wrap 242 for compressing the working fluid, the series of compression chambers comprising, in order from the radially outer side to the radially center along the profile of the wraps: low pressure chamber, medium pressure chamber, high pressure chamber.

An intake pipe 13 for introducing a working fluid having a suction pressure (low pressure) into the housing 12 and an exhaust pipe 17 for discharging the working fluid having a discharge pressure (high pressure) compressed by the compression mechanism CM out of the housing 12 are provided on the housing 12. The intake pipe 13 is connected to an intake port 130 of the compression mechanism CM to introduce a working fluid having a suction pressure into a low-pressure chamber of the compression mechanism CM. The high-pressure working fluid discharged from the exhaust port 220 of the compression mechanism CM is discharged to the outside of the housing 12 via the exhaust pipe 17.

In the illustrated example, the motor (including the stator 14 and the rotor 15) and the compression mechanism CM are both in a high temperature and high pressure environment of compressed high pressure working fluid. Therefore, the scroll compressor 1 shown in the drawings is also referred to as a high-pressure side scroll compressor. In addition, in the high-pressure side scroll compressor 1 of the present disclosure, the orbiting scroll 24 may be provided to be axially floatable to achieve axial flexibility of the compression mechanism CM. For example, a back pressure chamber B is formed between the movable scroll 24 and the main bearing housing 11, and a seal ring C as shown in the drawing is provided for isolating the back pressure chamber B from an external high pressure environment, and a back pressure hole B1 is provided in the movable scroll end plate 241, the back pressure hole B1 penetrating the movable scroll end plate 241 so as to fluidly communicate the back pressure chamber B with an intermediate pressure chamber defined inside the compression mechanism CM, so that the back pressure chamber B has an intermediate pressure, so that the back pressure chamber B can apply an upward axial thrust to the movable scroll 24 to push the movable scroll 24 toward the fixed scroll 22. However, it is to be understood that the present invention is not limited to the specific examples shown in the drawings, and may be applied to, for example, a low-pressure side compressor, that is, a low-temperature and low-pressure environment in which both the motor and the compression mechanism are in a low-pressure working fluid with suction.

The electric motor includes a stator 14 and a rotor 15. The rotor 15 is used to drive the drive shaft 16 to rotate the drive shaft 16 about its axis of rotation L relative to the housing 12. The first axial end 161 of the drive shaft 16 is operatively coupled to the hub G such that the drive shaft 16 can drive the orbiting scroll 24 in an orbiting motion relative to the non-orbiting scroll 22. preferably, as shown in fig. 1 and 2, a second inner peripheral wall surface G10 of a hub peripheral wall G1 of the hub G embeds a drive bearing 18, the drive bearing 18 being fixed relative to the hub G for movement with the hub G, and a bearing peripheral wall 181 of the drive bearing 18 including a first inner peripheral wall surface 180. A bush 19 is sleeved outside the first shaft end 161 of the drive shaft 16, and when the first shaft end 161 of the drive shaft 16 is coupled to the hub portion G, an outer peripheral wall surface 190 of the bush 19 and a first inner peripheral wall surface 180 of the drive bearing 18 are engaged and fitted with each other, thereby achieving driving of the orbiting scroll 24 by the drive shaft 16, and preferably, the bush 19 may be a relief bush such as a slide relief bush or a swing relief bush. And as shown in fig. 2, the outer peripheral portion of the orbiting scroll 24 is further provided with an oldham's slider member 20, which oldham's slider member 20 is capable of preventing the orbiting scroll 24 from performing a rotational motion, thereby ensuring that the orbiting scroll 24 performs a translatory orbiting motion about the rotational axis L (i.e., the central axis of the orbiting scroll 24 moves about the central axis of the non-orbiting scroll 22, but the orbiting scroll 24 does not rotate about the central axis thereof) with respect to the non-orbiting scroll 22 to compress the working fluid.

The lubricating oil may be stored in the bottom oil sump OR of the casing 12 as a source of lubricating oil for lubricating various components of the scroll compressor 1, such as the compression mechanism CM.

Drive shaft 16 may include a central bore 52 and an eccentric bore 56, with central bore 52 being formed at a second axial end 162 of drive shaft 16, and eccentric bore 56 extending upwardly from central bore 52 to a stub shaft at first axial end 161. The end (lower end) of the central bore 52 may be immersed in a bottom sump OR of the housing 12 of the scroll compressor 1 so that lubricating oil can be delivered from the bottom sump OR of the housing 12 to the first axial end 161, for example, under the action of centrifugal force generated by rotation of the drive shaft 16, and made to flow upward through the central bore 52 and the eccentric bore 56 and flow out from the oil hole of the head surface of the first axial end 161 into the inside space of the hub G — specifically, the region of the inside space of the hub circumferential wall G1 adjacent to the orbiting scroll end plate 241 is provided as an oil reservoir region adapted to store lubricating oil, which can flow to the edge G0 of the boss G via the gap between the drive bearing 18 and the bush 19, so that components such as the drive bearing 18 and the bush 19 can be lubricated and cooled. And also capable of lubricating and cooling the orbiting scroll 24 and the non-orbiting scroll 22 by further supplying the lubricating oil in the hub G to the compression mechanism CM, which will be described in detail later.

A first embodiment of the present invention will be described in detail below with reference to fig. 2 and 3.

As shown in fig. 2 and 3, for the technical purpose of achieving better lubrication of the compression mechanism CM, one embodiment of the present invention is provided with at least one oil delivery passage 30 in the hub circumferential wall G1 of the hub G and the bearing circumferential wall 181 of the drive bearing 18, the oil delivery passage 30 preferably extends in a horizontal direction transverse to the rotation axis L and penetrates the hub circumferential wall G1 and the bearing circumferential wall 181, and the oil delivery passage 30 includes an outer orifice 31 opening at the outer circumferential wall surface G12 of the hub circumferential wall G1 and an inner orifice 32 opening at the first inner circumferential wall surface 180 of the bearing circumferential wall 181, and the outer orifice 31 is at the same axial position as the inner orifice 32, and the oil delivery passage 30 is provided at a position away from the orbiting scroll end plate 241 as a whole, in particular, the bearing circumferential wall 181 has a first end surface adjacent to the orbiting scroll end plate 241 and a second end surface opposite to the first end surface, that is, this second end face abuts the flange portion G0 of the hub portion G, and the oil delivery passage 30 is provided close to the second end face (abutting the flange portion G0) of the bearing circumferential wall 181 as a whole, so that the oil delivery passage 30 can supply the lubricating oil in the gap between the drive bearing 18 and the bush 19 from the inner orifice 32 to the outer orifice 31 to be supplied into the back pressure chamber B as shown in fig. 2 and 3, and in particular, an arrow R1 in fig. 3 schematically shows the flow path of the lubricating oil.

Subsequently, in the present embodiment, the lubricating oil fed into the back pressure chamber B can further enter the intermediate pressure chamber of the compression mechanism CM through the back pressure hole B1 that is in fluid communication with the intermediate pressure chamber of the compression mechanism CM to lubricate the compression mechanism CM; in addition, the lubricating oil fed into the back pressure chamber B can also enter the compression mechanism CM via a gap between the fixed scroll 22 and the movable scroll 24 or be taken into a compression chamber inside the compression mechanism CM when the movable scroll 24 performs an orbiting motion with respect to the fixed scroll 22. In addition to this, particularly in the case of the low-pressure side scroll compressor, the lubricating oil can be carried into the compression mechanism CM in the form of oil mist along with the working fluid having the intake pressure sucked into the compression mechanism. It is understood that the configuration of the oil delivery passage 30 in the present embodiment is applicable not only to the high-pressure side scroll compressor shown in the drawings but also to the low-pressure side scroll compressor.

It should be understood that, although the oil delivery passage 30 extends in the horizontal direction transverse to the rotation axis L so that the outer orifice 31 is at the same axial position as the inner orifice 32 in the above-described embodiment, and the oil delivery passage 30 is provided integrally at a circumferential position away from the orbiting scroll end plate 241, it is conceivable that the oil delivery passage 30 may be at an angle to the horizontal direction, or the oil delivery passage 30 may not extend in a straight line as shown in the drawing, and may extend in various possible forms such as a curved line, a broken line, etc., as long as it is ensured that the inner orifice 32 is located at a position away from the orbiting scroll end plate 241, that is, at a position of the flange near the lower end portion of the boss portion G shown in the drawing — the inner orifice 32 is preferably located near the second end face of the bearing circumferential wall 181.

The present invention is designed to provide lubrication to the compression mechanism CM with the oil delivery passage 30 of such a configuration as described above, in order to better utilize the lubricating oil stored in the gap between the drive bearing 18 and the bush 19; specifically, as described earlier, the drive shaft 16 supplies the lubricating oil from the oil sump OR upward to the head of the first shaft end 161 by the centrifugal force generated when the drive shaft 16 rotates, and therefore, the rotation speed of the drive shaft 16 will affect the amount of oil supply, and the lubricating oil supplied to the head of the first shaft end 161 may decrease during the low rotation speed operation of the scroll compressor 1, but the lubricating oil will flow into the gap between the drive bearing 18 and the bush 19 after flowing out of the oil hole of the head and stay for a while, and therefore, in order to ensure the stabilization of the lubricating oil supply amount, it is preferable to provide the oil delivery passage 30, particularly the inner orifice 32, at a position distant from the head of the first shaft end 161 (i.e., distant from the orbiting scroll end plate 241), so that the lubricating oil stored in the gap between the drive bearing 18 and the bush 19 is introduced into the outer space of the boss portion G and further supplied into the compression mechanism CM as described earlier, to ensure the stability of the supply of lubricating oil. This improvement is a significant technical advance. Further, since the lubricating oil can be guided to the space outside the boss G after lubricating most of the axial region of the drive bearing 18, the bush 19, and the like, the utilization efficiency of the lubricating oil can be remarkably improved.

A second embodiment of the invention will be described below with reference to fig. 4a, 4b and 4 c. Fig. 4a, 4b and 4c show a further modification based on the first embodiment described above. Specifically, as shown in fig. 4a, 4b, and 4c, on the basis of the first embodiment, the oil groove 40 is provided on the surface of the outer peripheral wall surface 190 of the liner 19, the oil groove 40 is provided only on a part of the surface in the circumferential direction of the outer peripheral wall surface 190, and preferably, the first end 401 of the oil groove 40 extends to the first end surface 191 of the liner 19 adjacent to the orbiting scroll end plate 241, and the second end 402 of the oil groove 40 extends to the second end surface 192 of the liner 19 opposite to the first end surface 191. By providing the oil groove 40, as shown by an arrow R2 in fig. 4b, more lubricating oil can be carried and stored in the oil groove 40, so that the amount of lubricating oil supplied to the space outside the hub G via the oil carrying passage 30 will be significantly increased to provide better lubrication for the compression mechanism CM.

Further, it should be noted that since the bushing 19 rotates with the drive shaft 16, the oil groove 40 is not always aligned with the oil delivery passage 30 — that is, is not always in direct communication with the oil delivery passage 30, but is intermittently in direct communication with the oil delivery passage 30, as shown in fig. 4c, when the oil groove 40 is deflected to deviate from the oil delivery passage 30, the oil groove 40 will not be in direct communication with the oil delivery passage 30, and thus will not directly supply the lubricating oil to the oil delivery passage 30. Therefore, the oil groove 40 can perform intermittent oil supply to the oil delivery passage 30 to avoid excessive lubrication oil from entering the compression mechanism CM to lower the working fluid compression efficiency and to avoid excessive lubrication oil from being carried into the subsequent application equipment.

In the above embodiment, the oil groove 40 is in the form of a planar cut groove at the outer peripheral wall surface 190 of the liner 19, i.e., the oil groove 40 extends in the axial direction and penetrates the outer peripheral wall surface 190 of the liner 19, but it should be understood that the present invention is not limited thereto, and the oil groove 40 may also be, for example, an arc-shaped groove, a square-shaped groove, a V-shaped groove, and any groove having a cross section of other irregular shapes.

Also, as shown in fig. 4a, it is preferable that a guide groove 60 is additionally provided at a position of the first end surface 191 of the liner 19 corresponding to the oil groove 40, the guide groove 60 preferably providing a V-shaped groove as shown in the drawing and being aligned with and abutting the first end 401 of the oil groove 40 in the circumferential direction, so that the lubricating oil from the first end surface 191 of the liner 19 can be better guided into the oil groove 40 by the guide groove 60. Of course, in this embodiment, only the oil groove 40 may be provided without providing the guide groove 60, and the guide groove 60 may have any other size and shape.

A third embodiment of the present invention will be described below with reference to fig. 5 and 6. Fig. 5 and 6 show a further modification based on the foregoing second embodiment. Specifically, as shown in fig. 5 and 6, similarly to the second embodiment, an oil groove 40 is provided on the surface of the outer peripheral wall surface 190 of the liner 19, except that, a circumferential ring groove 50 extending along the edge of the second end face 192 is also provided on the surface of the outer circumferential wall surface 190 of the bush 19, the circumferential ring groove 50 being provided for the purpose of enlarging the gap between the outer circumferential wall surface 190 of the bush 19 located below the axial position of the oil groove 40 and the first inner circumferential wall surface 180 of the drive bearing 18 to reduce friction, because, since a large amount of the lubricating oil is concentrated at the oil groove 40, and a large amount of the lubricating oil is supplied to the oil delivery path 30, it is possible to cause an insufficient amount of lubricating oil between the first inner peripheral wall surface 180 of the drive bearing 18 by the outer peripheral wall surface 190 of the bush 19 below the axial position of the oil groove 40, thereby increasing the friction of this part and thus the possible friction is actively avoided by providing such a circumferential groove 50.

As shown in fig. 5, in the present embodiment, the oil groove 40 preferably still extends from the first end surface 191 to the second end surface 192 so as to partially overlap with the circumferential ring groove 50. Also, it is preferable, in order to avoid such wear as much as possible, as shown in fig. 6, that the axial edge 501 of the circumferential ring groove 50, which is remote from the second end face 192, be closer to the orbiting scroll end plate 241 than the inner orifice 32 of the oil delivery passage 30, so that the width range of the circumferential ring groove 50 along the rotation axis L can cover a wider area to avoid such wear as much as possible.

However, it should be understood that the second end 402 of the oil groove 40 may not extend to the second end face 192, that is, the second end 402 of the oil groove 40 may extend such that the axial position of the second end 402 is aligned with the axial position of the inner bore 32 to enable direct communication with the inner bore 32, or may extend downwardly from the first end face 191 beyond the axial position of the inner bore 32 of the oil transfer passage 30; even more, although perhaps not preferred, in certain special cases the second end 402 of the oil sump 40 may not extend to an axial location flush with the inner bore 32 of the oil transfer passage 30, but rather is located at an axial location closer to the orbiting scroll end plate 241 than the inner bore 32 — i.e., axially higher than the inner bore 32. As long as can realize the technical purpose of the utility model can, can set up as required.

Further, it is conceivable that the circumferential ring groove 50 of the above-described configuration may be provided on the surface of the first inner peripheral wall surface 180 of the drive bearing 18, or such circumferential ring grooves may be provided on both the surfaces of the first inner peripheral wall surface 180 and the outer peripheral wall surface 190, as long as such friction as described above can be reduced or avoided.

In addition, although only one oil delivery passage 30 is provided in each of the foregoing embodiments, the present invention is not limited thereto, and it should be understood that two or more oil delivery passages 30 may be provided according to actual needs to satisfy different demands.

Further, it should be understood that the scroll compressor according to the present invention may include, but is not limited to, the above-mentioned oil delivery passage 30, the oil groove 40 and the feature portion of the circumferential ring groove 50, which are configured to supply the lubricating oil to the compression mechanism CM and other devices — that is, for delivering the lubricating oil in the oil storage region away from the hub G in the inside space of the hub G, that is, away from the movable scroll end plate 241 (or the first shaft end 161 of the drive shaft 16), to the outside space of the hub G and further into the compression mechanism CM and other devices; that is, the above technical solution according to the present invention can be separately provided in a scroll compressor, or can be additionally implemented in the same scroll compressor with other oil transportation technical solutions in the prior art, for example, the scroll compressor in the prior art can provide an oil supply path penetrating through an orbiting scroll end plate in the orbiting scroll end plate, one end of the oil supply path is fluidly connected to a first side surface of the orbiting scroll end plate, which is away from a hub G, for example, the oil supply path is fluidly connected to a fluid receiving chamber in a compression mechanism, and the other end of the oil supply path is opened near an oil storage region of the hub G and directly communicates with an oil storage region, so as to directly transport the lubricating oil in the oil storage region to the first side surface of the orbiting scroll end plate, preferably, to the fluid receiving chamber in the compression mechanism; in some cases, the above-described solution of the present invention can obviously also be implemented in the same scroll compressor, if necessary, together with such solution of the prior art.

The following graph 7 shows a graph of the comparison experimental result of the high-side scroll compressor including the oil transfer passage 30, the oil groove 40, and the circumferential ring groove 50 according to the above-described third embodiment of the present invention with the high-side scroll compressor of the related art. Specifically, use prior art high pressure side scroll compressor as the comparison reference to through additionally implementing on the basis of the high pressure side scroll compressor of same prior art the utility model discloses a technical scheme of oil transfer route 30, oil groove 40 and circumference annular 50 in the third embodiment obtains the high pressure side scroll compressor of improvement to the contrast experiment has been carried out under the same operating mode.

Chart 7

As can be seen from the above graph 7, according to the present invention, the circulation rate of the lubricant oil of the improved high-pressure side scroll compressor is significantly higher than that of the high-pressure side scroll compressor of the prior art, which means under the same working condition, according to the present invention, the improved high-pressure side scroll compressor can transport significantly more lubricant oil to the compression mechanism, and, as can be seen from the graph, especially under the low rotation speed working condition, the circulation rate of the lubricant oil of the improved high-pressure side scroll compressor is 0.64% higher than that of the high-pressure side scroll compressor of the prior art by a factor of 0.29% twice. This shows that the improved high-side scroll compressor can still ensure excellent lubrication at low rotational speed conditions.

It is obvious that further different embodiments can be devised by combining different embodiments and individual features in different ways or modifying them.

The scroll compressor according to the preferred embodiment of the present invention has been described above with reference to the specific embodiments. It will be understood that the above description is intended to be illustrative and not restrictive, and that various changes and modifications may be suggested to one skilled in the art in view of the above description without departing from the scope of the invention. Such variations and modifications are also intended to be included within the scope of the present invention.

Claims

1. An orbiting scroll assembly comprising:

2. The orbiting scroll assembly of claim 1 wherein the bearing circumferential wall has a first end face adjacent the orbiting scroll end plate and a second end face opposite the first end face, the inner aperture being positioned proximate the second end face of the bearing circumferential wall.

3. The orbiting scroll assembly as claimed in claim 1, wherein said hub portion is provided at an end remote from said orbiting scroll end plate as a flange portion projecting radially outwardly, said oil delivery passage being positioned adjacent to said flange portion in the axial direction.

4. The orbiting scroll assembly according to claim 1,

the orbiting scroll assembly further includes a bush fitted to the first inner peripheral wall surface in the inner space in a rotatable manner with respect to the drive bearing,

an oil groove adapted to guide the lubricating oil in the oil storage region to the oil delivery passage is provided in an outer peripheral wall surface of the bush.

5. The orbiting scroll assembly according to claim 4 wherein the bushing has a first end face adjacent the orbiting scroll end plate, a first end of the oil groove extending to the first end face of the bushing to communicate with the oil storage region, and a second end of the oil groove communicating with the inner orifice.

6. The orbiting scroll assembly according to claim 5, wherein the oil groove is provided only in a part of an outer peripheral wall surface of the bushing in a circumferential direction, so that the oil groove intermittently directly communicates with the inner orifice when the bushing rotates relative to the drive bearing.

7. The orbiting scroll assembly according to claim 4 wherein the oil groove extends in an axial direction and through an outer peripheral wall surface of the bushing.

8. The orbiting scroll assembly according to any one of claims 4 to 7, wherein a circumferential ring groove is provided at an end portion of the outer circumferential wall surface of the bushing and/or the first inner circumferential wall surface remote from the orbiting scroll end plate.

9. The orbiting scroll assembly according to claim 8, wherein an axial edge of the circumferential ring groove (50) near the orbiting scroll end plate is flush with the inner orifice or higher in the axial direction than the inner orifice.

10. A scroll compressor, characterized in that it comprises an orbiting scroll assembly according to any one of claims 1 to 9.

11. The scroll compressor of claim 10, wherein the scroll compressor is a high side scroll compressor with a motor of the scroll compressor at a discharge pressure.

12. The scroll compressor of claim 11,

the scroll compressor includes a non-orbiting scroll and an orbiting scroll constituting a compression mechanism and cooperating to define a series of working fluid receiving chambers,

the scroll compressor is provided with a back pressure chamber having an intermediate pressure, the back pressure chamber being at least a part of the outer side space and adapted to urge the orbiting scroll toward the non-orbiting scroll.

13. The scroll compressor of claim 12,

a back pressure hole is provided in the orbiting scroll end plate to communicate the back pressure chamber with an intermediate compression chamber in the series of working fluid receiving chambers,

the lubricating oil led to the back pressure chamber via the oil delivery passage is adapted to be supplied to the interior of the compression mechanism through the back pressure hole and/or a gap between the first side surface of the orbiting scroll end plate and the corresponding contact surface of the non-orbiting scroll,

the drive shaft of the scroll compressor includes: a first shaft end fitted in a bushing of the orbiting scroll assembly; a second shaft end connected to a source of bottom lubricating oil of the scroll compressor; and an internal oil passage adapted to supply the lubricating oil in the bottom lubricating oil source to the oil reservoir region.