WO2021203636A1

WO2021203636A1 - Scroll compressor

Info

Publication number: WO2021203636A1
Application number: PCT/CN2020/117654
Authority: WO
Inventors: 贾祥敏; 秦岩; 刘强
Original assignee: 艾默生环境优化技术(苏州)有限公司
Priority date: 2020-04-07
Filing date: 2020-09-25
Publication date: 2021-10-14

Abstract

A scroll compressor (1), comprising: a compressor mechanism (CM) and a drive shaft (16); a main bearing (40); a bushing (51); and a counterbalance component (50), the counterbalance component (50) comprising a base mounted on the bushing (510 or integrally formed with the bushing (51), and a counterbalance part (502) extending out from the base. The counterbalance part (502) is arranged in a cavity and rotates around a rotational axis (L) along with the rotation of the drive shaft (16) and thus has an oil mixing face (5022) that acts as a windward face, the oil mixing face (5022) comprising a lower face (F2) near to the base and an upper face (F1) away from the base. The oil mixing face (5022) is structured so as to cause: the projected surface area of the upper face (F1) projected in the rotational direction of the counterbalance component (50) onto a projection reference plane to be larger than the projected surface area of the lower face (F2) projected in the rotational direction onto the projection reference plane. The present scroll compressor is able to provide better balance of motion and is able to implement better oil mixing and oil transmission effects, while at the same time markedly reducing the power consumption of oil mixing, and being simple in structure and easy to process and manufacture, thus having relatively high cost-effectiveness.

Description

Scroll compressor

This application claims the priority of the following Chinese patent applications: a Chinese patent application filed with the Chinese Patent Office on April 7, 2020, with the application number 202010266518.5 and the invention titled "Scroll Compressor"; on April 7, 2020 The application number submitted to the Chinese Patent Office is 202020493705. 2, a Chinese patent application named "scroll compressor". The entire contents of these patent applications are incorporated into this application by reference.

Technical field

The present disclosure relates to a scroll compressor.

Background technique

This section provides background information related to the present disclosure, which does not necessarily constitute prior art.

Scroll compressors can be used in, for example, refrigeration systems, air conditioning systems, and heat pump systems. The scroll compressor includes a compression mechanism for compressing working fluid (such as refrigerant). The compression mechanism includes a movable scroll and a fixed scroll. When the scroll compressor is running, the drive shaft drives the movable scroll relative to the fixed scroll. The orbiting relative motion enables the movable scroll and the fixed scroll to maintain dynamic engagement with each other, thereby forming a series of compression chambers between the movable scroll and the fixed scroll to compress the working fluid.

In order to realize the orbiting relative movement of the movable scroll with respect to the fixed scroll, in the scroll compressor, while the anti-rotation mechanism is provided, an eccentric pin is provided at the drive shaft to use the principle of eccentricity to make the movable scroll relative to The fixed scroll performs circular translation. However, this eccentric configuration may cause unbalanced motion of moving parts, thereby increasing motion noise and unnecessary friction. In order to suppress this unbalanced motion, it is usually used in scroll compressors. The drive shaft and other places are equipped with counterweights for balancing. In addition, for some specific counterweights, the counterweight is also provided with an oil stirring surface, that is, when the counterweight rotates with the drive shaft, the oil stirring surface can stir nearby lubricating oil to promote the flow of lubricating oil to the surrounding moving parts. And its relative motion contact surface to achieve better lubrication.

In practical applications, in order to reduce the oil stirring resistance of the oil stirring surface and reduce power consumption, the oil stirring surface needs to be set to have a larger inclination. However, this inclined surface design will significantly change the position of the center of mass of the counterweight, especially It is the inclined surface design at certain angles that will cause the center of mass of the counterweight to move along the longitudinal axis and deviate from the center of mass of the drive bushing matched with the eccentric pin, which may cause a larger deflection moment and cause the bushing The relative offset and wear of the drive bearing is not conducive to the stability of operation. Therefore, the counterweight needs to be improved to ensure dynamic balance and further improve the oil stirring efficiency and reduce the oil stirring power consumption while avoiding bushings and drive bearings. The relative offset and wear.

Summary of the invention

The general summary of the present disclosure is provided in this section, rather than a comprehensive disclosure of the full scope of the present disclosure or all the features of the present disclosure.

The purpose of the present disclosure is to improve one or more technical problems mentioned above. In general, the present disclosure provides a scroll compressor, which includes:

A compression mechanism, which is adapted to compress a working fluid and includes a movable scroll having a drive coupling part;

A drive shaft, the drive shaft is adapted to drive the compression mechanism, the drive shaft includes a drive portion, the drive portion is drivingly engaged with the drive coupling portion so that the drive shaft can drive the movable scroll;

A main bearing seat adapted to support the compression mechanism and the drive shaft, the main bearing seat defines a cavity, and lubricating oil accumulates in the cavity to have a normal oil level; and

A bushing provided between the driving coupling part and the driving part; and

A counterweight member, the counterweight member defines a rotation axis, the counterweight member can rotate around the rotation axis, the counterweight member includes being mounted to the bushing or being integrated with the bushing A base formed on the ground and a weight portion extending from the base. The weight portion is located in the cavity and rotates around the rotation axis with the rotation of the drive shaft so as to have a windward surface Stir the noodles,

Wherein, taking the dividing line corresponding to the normal oil level as the boundary, the oil stirring surface includes a lower surface adjacent to the base and an upper surface away from the base, wherein the oil stirring surface is configured such that : The projection area of the upper surface projected to the projection reference surface along the rotation direction of the weight member is larger than the projection area of the lower surface projected to the projection reference surface along the rotation direction, the projection reference The plane is a virtual plane parallel to the rotation axis of the counterweight member and passing through the intersection line of the oil stirring surface and the top surface of the base.

The purpose of this configuration is to raise the center of mass of the counterweight portion upward, and appropriately reduce the area of the lower surface of the oil stirring surface that is usually in the lubricating oil, so as to reduce oil stirring resistance and reduce oil stirring power consumption .

According to a preferred embodiment of the present disclosure, the oil stirring surface is configured such that the ratio of the projected area of the upper surface to the projected area of the lower surface is greater than or equal to 1.15.

According to a preferred embodiment of the present disclosure, the oil stirring surface is configured such that the ratio of the projected area of the upper surface to the projected area of the lower surface is greater than or equal to 1.3.

According to a preferred embodiment of the present disclosure, the scroll compressor further includes an oil drain path adapted to discharge the lubricating oil in the cavity to the outside of the main bearing housing, the oil drain path including An opening at the peripheral wall of the main bearing housing, and the normal oil level is aligned with the opening.

According to a preferred embodiment of the present disclosure, the counterweight portion has an upper end portion away from the base and a lower end portion adjacent to the base, and the upper end portion faces the counterweight portion relative to the lower end portion. The front side in the direction of rotation protrudes.

This configuration can lift the center of mass of the weight portion upward, thereby avoiding the center of mass of the weight portion from moving down along the longitudinal axis and deviating from the center of mass of the bushing, so it can avoid the generation of a larger center of mass in the bushing. The deflection moment improves the operation stability, and the oil stirring surface of this inclined surface design can also significantly reduce the oil stirring resistance, thereby improving the oil stirring efficiency and reducing the oil stirring power consumption.

According to a preferred embodiment of the present disclosure, the angle formed by each part of the oil stirring surface and the lower edge of the weight portion is greater than 90°.

According to a preferred embodiment of the present disclosure, the oil stirring surface includes a convex arc surface, a concave arc surface, a flat surface, a step surface or a combination thereof.

According to a preferred embodiment of the present disclosure, the base is a ring-shaped mounting portion, and the ring-shaped mounting portion is sleeved on the outside of the bush to be fixedly installed with the bush.

According to a preferred embodiment of the present disclosure, at least one oil inlet is provided on the oil stirring surface, at least one oil outlet is provided on the top end surface of the counterweight part, and the oil outlet is provided inside the counterweight part. The at least one oil inlet extends to the at least one oil passage from the at least one oil outlet.

By arranging the above-mentioned configuration of the oil inlet, oil outlet and oil circuit, the oil can be stirred and the lubricating oil can be further targeted to the specific position-the thrust surface, so that the counterweight component can simultaneously play the role of stirring The role of oil and oil transportation.

According to a preferred embodiment of the present disclosure, the at least one oil passage extends along the direction of the rotation axis of the counterweight member.

According to a preferred embodiment of the present disclosure, the height of the weight portion is set such that: in the installed state of the weight member, in the direction of the rotation axis of the weight member, the at least one The distance between the oil outlet and the thrust surface of the main bearing seat that is in sliding contact with the movable scroll is less than or equal to 5.5 mm.

Specifically, when the lubricating oil comes out of the oil outlet, the oil droplets will be thrown out along the direction of rotation, and then the height of the oil droplets will not continue to increase because it is no longer affected by the rotating force. When the distance between the oil outlet and the thrust surface is too large, a large amount of oil is thrown onto the inner wall of the main bearing cover and cannot reach the thrust surface. Experiments show that it is better when the distance between the oil outlet and the thrust surface is less than or equal to, which can ensure that enough lubricating oil is delivered to the thrust surface, which can improve the lubrication of the thrust surface and reduce wear; when it is greater than, Only a relatively small amount of lubricating oil reaches the thrust surface, which does not help to improve the lubrication of the thrust surface and reduce wear.

According to a preferred embodiment of the present disclosure, the weight member is configured such that the at least one oil outlet is located at the radial inner side of the thrust surface.

In summary, the scroll compressor according to the present disclosure provides at least the following beneficial technical effects: the scroll compressor according to the present disclosure can provide better motion balance for the movement of the internal components of the scroll compressor, and can achieve better The oil stirring and oil conveying effect, while significantly reducing the oil stirring power consumption, and the structure is simple, easy to process and manufacture, and has high cost-effectiveness.

Description of the drawings

The aforementioned and additional features and characteristics of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings, which are only examples and are not necessarily drawn to scale. In the drawings, the same reference numerals are used to indicate the same parts. In the drawings:

Fig. 1 shows a longitudinal sectional view of a scroll compressor according to the present disclosure;

Figures 2a and 2b show a first embodiment of a scroll compressor according to the present disclosure, wherein Figure 2a shows a perspective view of a counterweight member, and Figure 2b shows a front view of the counterweight member;

Figures 3a to 3c show a second embodiment of the scroll compressor according to the present disclosure, in which Figure 3a shows a perspective view of the counterweight assembly, Figure 3b shows a side view of the counterweight assembly, and Figure 3c shows the counterweight Front view of the component;

Figures 4a and 4b show examples of prior art scroll compressors, in which Figure 4a shows a perspective view of a counterweight assembly, and Figure 4b shows a side view of the counterweight assembly;

Figures 5a to 5c show a third embodiment of the scroll compressor according to the present disclosure, wherein Figure 5a shows a perspective view of a counterweight member, Figure 5b shows a front view of the counterweight member, and Figure 5c shows A perspective view of the counterweight assembly when it is installed on the drive shaft of the scroll compressor; and

Figures 6a to 6d show a fourth embodiment of the scroll compressor according to the present disclosure, wherein Figure 6a shows a perspective view of the counterweight assembly, Figure 6b shows a side view of the counterweight assembly, and Figure 6c shows the counterweight The front view of the component, Fig. 6d shows a perspective view of the counterweight assembly when it is mounted to the drive shaft of the scroll compressor.

Reference mark list

Scroll compressor 1; housing 12; stator 14; rotor 15; drive shaft 16

Main bearing seat 40; compression mechanism CM; cover 26; base 28; oil sump O

High pressure space A2; low pressure space A1; partition 19; exhaust pipe 17; orbiting scroll 24

Fixed scroll 22; fixed scroll end plate 221; fixed scroll scroll S2; orbiting scroll 24

Orbiting scroll end plate 241; Orbiting scroll scroll S4; Hub 240; Exhaust port C; Bush 51

Main bearing cover plate 420; thrust surface 422; rotation axis L; counterweight assembly 5

Counterweight member 50; Annular mounting part 501; Counterweight part 502; Oil stirring surface 5022

Upper end 5024; lower end 5026; lower edge 5021; top end surface 5023

Prior art counterweight component P5; Prior art oil stirring surface P5022

Prior art counterweight part P502; Prior art lower edge P5021

Prior art bushing P51

Oil inlet 5027; oil outlet 5028; lower face F2; upper face F1

Boundary line D; step part T; oil drain path 11

Detailed ways

The preferred embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings 1-6d and in comparison with the prior art. The following description is merely exemplary in nature and is not intended to limit the present disclosure and its applications or uses.

For ease of description, the scroll compressor shown in FIG. 1 is exemplarily shown as a low-pressure side scroll compressor—that is, the electric motor is located in a low-pressure space, but the scroll compressor according to the present disclosure is not limited to this Type, the present disclosure is also applicable to other suitable types of scroll compressors such as the high-pressure side scroll compressor-the electric motor is located in the high-pressure space.

Fig. 1 shows a longitudinal cross-sectional view of a scroll compressor 1 according to the present disclosure. First, the overall structure of the scroll compressor 1 according to the present disclosure will be briefly described with reference to FIG. 1.

As shown in Figure 1, the scroll compressor 1 includes a substantially cylindrical casing 12, an electric motor (including a stator 14 and a rotor 15), a drive shaft 16, a main bearing housing 40, and a working fluid suitable for compressing a working fluid (such as a refrigerant). ) Compression mechanism CM.

The cover 26 at the top of the housing 12 and the base 28 at the bottom of the housing 12 may be mounted to the housing 12 so as to define the internal volume of the scroll compressor 1. Lubricants such as lubricating oil may be stored in an oil pool O in the bottom of the internal volume for lubricating various relevant components of the scroll compressor 1. Specifically, for example, the drive shaft 16 is provided with an oil supply path (not specifically shown in the figure) extending upward from the oil pool O to the upper end of the drive shaft 16, so as to facilitate further supply of lubricating oil to the main bearing housing. 40 and compression mechanism CM to provide lubrication.

The scroll compressor 1 further includes a partition 19 provided between the top cover 26 and the housing 12 to partition the internal space of the scroll compressor 1 into a high-pressure space A2 and a low-pressure space A1. Specifically, a high-pressure space A2 is formed between the partition 19 and the cover 26, and a low-pressure space A1 is formed between the partition 19, the housing 12, and the base 28. The housing 12 in the low-pressure space A1 is provided with an intake pipe 18 for introducing the low-pressure working fluid to be compressed, and the high-pressure space A2 is provided with a device for discharging the compressed high-temperature and high-pressure fluid to the outside of the scroll compressor 1. Exhaust pipe 17. As mentioned above, the embodiment shown in FIG. 1 is an example of a low-pressure side scroll compressor. Therefore, as shown in FIG. 1, the motor and the compression mechanism CM are located in the low-pressure space A1.

The compression mechanism CM includes a movable scroll 24 and a fixed scroll 22. The fixed scroll 22 includes a fixed scroll end plate 221 and a fixed scroll scroll S2; the movable scroll 24 includes a movable scroll end plate 241, a movable scroll scroll S4 extending from the first side surface of the movable scroll end plate 241, and A hub 240 (the hub corresponds to the drive coupling according to the present disclosure) extending from the second side surface of the movable scroll end plate 241. In the compression mechanism CM, the fixed scroll scroll S2 and the movable scroll scroll S4 are joined to form an open suction chamber in fluid communication with the outside of the compression mechanism CM. The low-pressure space A1 is in fluid communication so as to introduce the working fluid to be compressed in the low-pressure space A1 into the compression mechanism CM; a series of compression chambers whose volumes gradually decrease from the radially outer side to the radially inner side (including the following row The central compression chamber connected to the port C). In addition, the compression mechanism CM also includes an exhaust port C located at the radial center of the fixed scroll end plate 221. The exhaust port C can be in fluid communication with the high-pressure space A2 in the housing 12 and will be compressed with high temperature and high pressure. The fluid is discharged into the high-pressure space A2.

On the contrary, for the high-pressure side scroll compressor, the motor and the compression mechanism CM are located in the high-pressure space. The compression mechanism CM directly introduces low-pressure working fluid from the outside, for example, through a suction fluid pipe, and discharges the compressed high-temperature and high-pressure fluid into the internal volume of the housing. The entire internal volume forms a high-pressure space. Therefore, the operating principles of the high-pressure side scroll compressor and the low-pressure side scroll compressor are basically the same.

A part of the drive shaft 16 is supported by a main bearing provided in the main bearing housing 40. The upper end of the drive shaft 16 is formed with an eccentric crank pin (not specifically shown in the figure), and the eccentric crank pin is fitted into the hub 240 of the movable scroll 24 via a bush (for example, an unloading bush) 51 to drive the movable scroll 24 . Here, it should be noted that the eccentric crank pin corresponds to the driving part according to the present disclosure.

The main bearing housing 40 includes a main bearing cover plate 420 as a thrust plate. The main bearing cover 420 may be fixed on the body of the main bearing seat 40 by a fixing device. A space is formed between the body of the main bearing housing 40 and the main bearing cover plate 420 (it can also be said that the main bearing housing 40 defines a cavity). The back side (second side surface) of the movable scroll 24 is supported by the main bearing cover plate 420. The annular end surface 422 of the main bearing cover plate 420 is used to support the movable scroll 24. During the operation of the scroll compressor 1, The thrust surface 422 maintains contact with the back side of the movable scroll 24 and performs sliding movement relative to each other.

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 around its rotation axis L, and the drive shaft 16 is coupled to the movable scroll 24 to drive the movable scroll 24. Specifically, the fixed scroll 22 is mounted to the main bearing housing 40 using mechanical fasteners, for example, to restrict the radial and circumferential movement of the fixed scroll 22 but allow the fixed scroll 22 to perform a certain degree of axial translation, and the movable scroll The orbiting 24 is driven by the electric motor via the drive shaft 16, so that it can perform translational rotation relative to the fixed scroll 22 by means of, for example, an Oldham ring—that is, orbit (that is, the axis of the movable scroll 24 is relative to the fixed scroll 22). The axis revolves, but the orbiting scroll 24 itself does not rotate around its axis—that is, spinning), so that the fixed scroll S2 and the orbiting scroll S4 are joined to form a series of volumes that gradually decrease from the radial outside to the radial inside. Small compression cavity.

In order to avoid or reduce motion imbalance, and to reduce the contact force between the side surface of the fixed scroll S2 of the fixed scroll 22 and the side surface of the movable scroll S4 of the movable scroll 24, the scroll compressor 1 The counterweight assembly 5 according to the embodiment of the present disclosure is provided. As shown in FIG. 1, the counterweight assembly 5 can be mounted to the upper end of the drive shaft 16 (in particular, the eccentric crank pin) and located in the space (cavity) defined by the main bearing housing 40, the counterweight assembly 5 is configured as It can rotate with the drive shaft 16 and the centrifugal force caused by the rotation of the counterweight assembly 5 acts on the drive shaft 16 to improve dynamic balance and force balance.

In addition, as described above, lubricating oil can be supplied to the space defined by the main bearing housing 40 where the counterweight assembly 5 is located via the oil passage in the drive shaft 16. Generally, lubricating oil will accumulate in this space, so that the weight assembly 5 will whip the lubricating oil during the rotation (especially, the windward surface of the weight portion of the weight assembly 5 will whip the lubricating oil). Therefore, the windward surface of the counterweight assembly 5 is also called the oil stirring surface (not specifically shown in FIG. 1 and will be described in detail below). The oil stirring surface agitates the surrounding lubrication while the counterweight assembly 5 rotates with the drive shaft 16 The oil arouses oil droplets and oil mist, so that the lubricating oil can be more fully dispersed to the surrounding moving parts-such as the orbiting scroll end plate of the scroll mechanism CM-and the contact surfaces of the parts in contact with the moving parts, In particular, the thrust surface 422 of the main bearing cover 420 for supporting the movable scroll 24 provides better lubrication.

Preferably, in each embodiment of the present disclosure, the counterweight assembly 5 is defined as including the aforementioned bushing 51 and a counterweight member 50 mounted to the bushing 51 or integrally formed with the bushing 51. It should be understood that, in some applications, the counterweight assembly 5 may not include the bushing 51, that is, it can be manufactured and used separately without the limitation of the structure of the bushing 51 itself.

Hereinafter, a preferred embodiment of the scroll compressor according to the present disclosure will be described in detail with reference to FIGS. 2a to 6d.

2a and 2b show the first embodiment of the scroll compressor 1 according to the present disclosure, wherein FIG. 2a shows a perspective view of the counterweight member 50, and FIG. 2b shows a front view of the counterweight member 50. As shown in FIG. The weight member 50 includes: a base-preferably configured as a ring-shaped mounting portion 501 shown in the figure, the ring-shaped mounting portion 501 is sleeved on the outside of the bushing 51 to be fixedly installed with the bushing 51; and from the base Seat—annular mounting portion 501—weight portion 502 extending to one side. In particular, the weight portion 502 may be configured to extend radially outward to one side and then axially upward. One side surface of the weight portion 502 is configured as an oil stirring surface 5022, as best shown in FIG. 2b, the oil stirring surface 5022 of the weight portion 502 includes a lower surface F2 adjacent to the base (annular mounting portion 501) and away The upper surface F1 of the base, wherein the oil stirring surface 5022 is preferably configured such that the projected area of the upper surface F1 in the circumferential direction of the counterweight member 50 is larger than the projected area of the lower surface F2 in the circumferential direction. It should be noted here that the projected area of the upper surface F1 and the lower surface F2 along the circumferential direction of the weight member 50 (ie, the direction of rotation/rotation direction) refers to the direction of rotation of the upper surface along the weight member The projection area projected to the projection reference surface and the projection area of the lower surface projected to the projection reference surface along the rotation direction. Wherein, the projection reference plane may be: a virtual plane parallel to the rotation axis of the counterweight member and passing through the intersection line of the oil stirring surface and the top surface of the base. When the oil stirring surface rotates, the points on the oil stirring surface will pass through the projection reference plane vertically. In addition, in the example in which the entire oil stirring surface extends vertically so as to be parallel to the rotation axis of the counterweight member and facing the front of the rotation direction, the projection reference surface coincides with the oil stirring surface, that is, the entire oil stirring surface is located at the projection reference Surface. At this time, the projected areas of the upper surface and the lower surface are the largest and are respectively equal to their real areas. Preferably, the ratio of the projected area of the upper surface F1 in the circumferential direction of the counterweight member 50 to the projected area of the lower surface F2 in the circumferential direction is greater than or equal to 1.15, and more preferably, the ratio of the projected area of the upper surface F1 along the circumferential direction The ratio of the projected area of the member 50 in the circumferential direction to the projected area of the lower surface F2 in the circumferential direction is greater than or equal to 1.3. The purpose of this configuration is to further raise the center of mass of the counterweight portion 502 upward, and appropriately reduce the area of the lower surface F2 of the oil stirring surface 5022 that is usually in the lubricating oil, so as to reduce the oil stirring resistance and reduce Stirring power consumption. The boundary between the upper surface F1 and the lower surface F2 may be defined such that the upper surface F1 and the lower surface F2 correspond to the oil level of the lubricating oil accumulated in the space defined by the main bearing housing 40 under normal circumstances. Under normal circumstances, the oil level is generally basically determined for a specific scroll compressor, but only according to the different actual operating conditions of the specific scroll compressor (such as high-speed/low-speed operation) or Some unexpected conditions (such as unexpected fuel shortage) and some changes.

Now, referring again to the view of the scroll compressor 1 shown in FIG. 1, it can be seen that the scroll compressor 1 is also provided with an oil drain path 11 to discharge the lubricating oil accumulated in the space of the main bearing housing 40 outward. Returning to the oil sump O, the opening of the oil drain path 11 provided at the peripheral wall of the main bearing housing 40 is roughly aligned with the position of the counterweight 502. Therefore, in this particular case where the oil drain path 11 for draining oil from the space (cavity) of the main bearing housing is provided, the oil level under normal circumstances is aligned with the opening of the oil drain path 11. Thus, the boundary line between the upper surface F1 and the lower surface F2 according to the present embodiment is aligned with the opening of the oil discharge path 11.

As best shown in FIG. 2b, the boundary D between the upper surface F1 and the lower surface F2 is located slightly above the step T of the oil stirring surface 5022. Then, it is also conceivable that the dividing line D exactly coincides with the step T, and it may even be better in some cases that the dividing line D is located below the step T. Specifically, by appropriately setting the axial position of the step portion T in the stirring surface 5022, and/or by appropriately adjusting the axial position of the counterweight assembly 5 when installed in the scroll compressor 1, The step portion T of the oil stirring surface 5022 is exactly aligned with the opening of the oil discharge path 11 so that the portion above the step portion T becomes the upper surface F1 and the portion below the step portion T becomes the lower surface F2. In this way, the projected area of the upper face F1 can be made sufficiently larger than the projected area of the lower face F2. In addition, as best shown in Fig. 2b, preferably, most of the upper face F1 in the axial direction (ie from the dividing line D to the top end face 5023) has a relatively large (radial) thickness, while the lower face F2 has a relatively small thickness from the base (annular mounting portion 501) to most of the dividing line D. In this way, it is ensured that the projected area of the upper face F1 is larger than the projected area of the lower face F2.

Figures 3a to 3c show a second embodiment of the scroll compressor 1 according to the present disclosure, wherein Figure 3a shows a perspective view of the counterweight assembly 5, Figure 3b shows a side view of the counterweight assembly 5, and Figure 3c shows The front view of the counterweight member 50 is shown. The second embodiment has substantially the same configuration as the aforementioned first embodiment, and further improvements have been made on this basis. The difference is that: based on the configuration of the first embodiment, in the second embodiment, the configuration is further The upper end portion 5024 of the weight portion 502 protrudes toward the front side in the circumferential direction of the weight portion 502 (that is, the rotation direction of the weight portion 502) relative to the lower end portion 5026, and preferably, in this embodiment, the oil stirring surface 5022 It is configured as a plane inclined at an obtuse angle with respect to the lower edge 5021 of the counterweight portion 502 (the lower edge 5021 can be regarded as being on a plane perpendicular to the rotation axis L of the drive shaft 16), that is, so that every part of the oil stirring surface 5022 The angles formed with the lower edge 5021 of the weight portion 502 are all greater than 90°, and more preferably all are less than 150°. This configuration can lift the center of mass of the weight portion 502 upward, thereby preventing the center of mass of the weight portion 502 from moving downward along the longitudinal axis L and deviating from the center of mass of the bushing 51 (for example, as shown in FIGS. 4a and 4b) In the case of the counterweight assembly P5 of the scroll compressor in the prior art), it is possible to avoid the generation of a large deflection moment in the bushing 51, improve the operational stability, and the oil stirring surface 5022 of this inclined surface design is also It can significantly reduce oil stirring resistance to improve oil stirring efficiency and reduce oil stirring power consumption.

Specifically, Figures 4a and 4b show examples of the counterweight assembly P5 of the prior art scroll compressor, wherein Figure 4a shows a perspective view of the counterweight assembly P5, and Figure 4b shows a side view of the counterweight assembly P5. As shown in the figure, the oil stirring surface P5022 of the counterweight component P5 in the prior art is generally configured as a plane inclined at an acute angle with respect to the lower edge P5021 of the counterweight part P502, which is completely contrary to the above-mentioned embodiment of the present disclosure. The design of the oil stirring surface P5022 will cause the center of mass of the counterweight P502 to move down along the longitudinal axis L and deviate from the center of mass of the bushing P51, resulting in a larger deflection moment in the bushing P51 relative to The drive bearing provided between the bush P51 and the hub 240 of the movable scroll 24 is offset. The above-mentioned configuration of the present disclosure can avoid this problem in the prior art, and at the same time can ensure high oil stirring efficiency.

Although in the above-mentioned embodiments of the present disclosure, the oil stirring surface 5022 is configured as a planar shape, the present disclosure is not limited to this, and the oil stirring surface 5022 may include a convex arc surface, a concave arc surface, a flat surface, and a stepped surface (by A surface composed of multiple planes with different inclination angles) or any combination thereof. As long as it can be ensured that the upper end portion 5024 of the weight portion 502 protrudes toward the front side in the circumferential direction of the weight portion 502 (that is, the rotation direction of the weight portion 502) relative to the lower end portion 5026, the weight portion 502 can be avoided. The center of mass of is moved downward along the direction of the longitudinal axis L to deviate from the center of mass of the bushing 51.

In addition, although in the above-described embodiment, the base of the weight member 50 is configured as a ring-shaped mounting portion 501 that is sleeved on the outside of the bushing 51 to be fixedly mounted with the bushing 51, the present invention The disclosure is not limited to this. For example, the base of the weight member 50 may also be integrally formed with the bush 51.

Figures 5a to 5c show a third embodiment of the scroll compressor 1 according to the present disclosure, wherein Figure 5a shows a perspective view of the counterweight member 50, Figure 5b shows a front view of the counterweight member 50, 5c shows a perspective view when the counterweight assembly 5 is mounted to the drive shaft 16 of the scroll compressor 1. The third embodiment has roughly the same configuration as the aforementioned first embodiment, and further improvements have been made on this basis. The difference is that: based on the configuration of the first embodiment, the second embodiment is in the counterweight portion 502 Two oil inlets 5027 are provided on the oil stirring surface 5022, two oil outlets 5028 are provided on the top end surface 5023 of the counterweight part 502, and two oil inlets 5027 are respectively provided inside the counterweight part 502. Two separate oil passages (not shown in the figure) extending to the two oil outlets 5028. Thus, when the counterweight assembly 5 rotates with the drive shaft 16, the lubricating oil can reach the two oil outlets 5028 through the two oil inlets 5027 and two separate oil passages, thereby removing the lubricating oil from the counterweight part. The lower end 5026 of the 502 is supplied to the upper end 5024 (top end surface 5023) to reach other components and surfaces located near the top end surface 5023, such as the thrust surface 422 of the main bearing cover 420, as shown in FIG. 5c, When the counterweight assembly 5 is installed in the scroll compressor 1, the counterweight assembly 5 is installed in the space defined by the main bearing housing 40, and the top end surface 5023 of the counterweight portion 502 abuts the thrust of the main bearing cover 420 Surface 422, and the oil outlet 5028 is located at the radial inner side of the thrust surface 422. Therefore, through the two oil inlets 5027, two separate oil passages and two oil outlets 5028, the lubricating oil can be supplied To the thrust surface 422 of the main bearing cover 420, the friction sliding contact between the thrust surface 422 and the movable scroll 24 provides lubrication. Preferably, in the present embodiment, the counterweight assembly 5 is configured such that: in the state where the counterweight assembly 5 is mounted to the scroll compressor 1, in the direction of the longitudinal axis (rotation axis) of the counterweight assembly 5 (ie, the axis of rotation) , In the direction of the longitudinal axis L of the scroll compressor 1), the distance between the oil outlet 5028 and the thrust surface 422 is less than or equal to 5.5 mm, so that lubricating oil can be supplied to the thrust surface 422 more efficiently. Specifically, when the lubricating oil comes out of the oil outlet 5028, the oil droplets will be thrown out along the direction of rotation, and then the height of the oil droplets will not continue to increase because it is no longer affected by the rotating force. When the distance between the oil outlet 5028 and the thrust surface 422 is too large, a large amount of oil is thrown onto the inner wall of the main bearing cover 420 and cannot reach the thrust surface 422. Experiments show that it is better when the distance between the oil outlet 5028 and the thrust surface 422 is less than or equal to 5.5mm, which can ensure that enough lubricating oil is delivered to the thrust surface 422, which can improve the lubrication and decrease of the thrust surface 422. Wear; when it is greater than 5.5mm, only a relatively small amount of lubricating oil reaches the thrust surface 422, which does not help improve the lubrication of the thrust surface 422 and reduce wear.

Further, preferably, in the present embodiment, the counterweight assembly 5 is configured such that the oil passage extends vertically upward along the direction of the longitudinal axis of the counterweight assembly 5 (ie, the direction of the longitudinal axis L of the scroll compressor 1) When the counterweight assembly 5 rotates, the centrifugal force causes the lubricating oil to flow upward in the oil path to the top end surface 5023, and then to the thrust surface 422. The oil circuit of this configuration can be easily processed and manufactured by various methods well known in the prior art. In addition, it should be understood that the above two oil passages are not necessarily completely independent of each other, but may also be partially overlapped or staggered. For example, based on the above two oil inlets 5027 and two oil outlets 5028, it is completely possible to set There is only one oil path, which branches only at two oil inlets 5027 and two oil outlets 5028 to respectively communicate with two oil inlets 5027 and two oil outlets 5028; and the oil path is not limited to It extends along the direction of the longitudinal axis of the counterweight assembly 5 into a straight oil path, but it can be in any direction and can be arc, broken, wave, step, and other special-shaped shapes, etc., and can be set according to actual needs. The configuration of the oil circuit; and the number of oil inlets and oil outlets, and the number of corresponding oil circuits can be any number, which can be set according to actual needs.

By combining the above-mentioned configuration of the oil stirring surface 5022 with the above-mentioned configuration of the oil inlet, outlet and oil circuit, it is possible to achieve efficient oil stirring and reduce oil stirring power consumption, and further targeted The lubricating oil is transported to a specific position-the thrust surface 422, so that the counterweight assembly 5 can play the role of stirring oil and transporting oil at the same time.

Figures 6a to 6d show a fourth embodiment of the scroll compressor 1 according to the present disclosure, wherein Figure 6a shows a perspective view of the counterweight assembly 5, Figure 6b shows a side view of the counterweight assembly 5, and Figure 6c shows A front view of the counterweight member 50 is shown, and FIG. 6d shows a perspective view when the counterweight assembly 5 is installed to the drive shaft 16 of the scroll compressor 1. The fourth embodiment includes the features of the foregoing various embodiments according to the present disclosure, and is a combination of the foregoing various embodiments. As shown in the figure, one side surface of the weight portion 502 is configured as an oil stirring surface 5022, and the upper end portion 5024 of the weight portion 502 faces the circumferential direction of the weight portion 502 relative to the lower end portion 5026 (that is, the rotation direction of the weight portion 502). ) Protrudes so that the oil stirring surface 5022 is configured as a plane inclined at an obtuse angle with respect to the lower edge 5021 of the weight portion 502, and two oil inlets are provided on the oil stirring surface 5022 of the weight portion 502 5027, two oil outlets 5028 are provided on the top end surface 5023 of the counterweight portion 502, and two separate oil outlets 5028 are respectively provided inside the counterweight portion 502 extending from the two oil inlets 5027 to the two oil outlets 5028 The oil path is so that the thrust surface 422 supplies lubricating oil (see FIG. 6d), and preferably, the distance between the oil outlet 5028 and the thrust surface 422 is less than or equal to 5.5 mm. Further, referring to FIG. 6c, the ratio of the projected area of the upper surface F1 of the oil stirring surface 5022 in the circumferential direction of the counterweight assembly 5 to the projected area of the lower surface F2 in the circumferential direction is preferably greater than or equal to 1.3.

By combining the structural features of the various embodiments described above, it is possible to optimally realize the beneficial technical effects of realizing dynamic balance of the counterweight assembly 5, efficient oil stirring and lubricating oil delivery, and reducing oil stirring power consumption, thereby improving the scroll compressor 1. The overall operating performance.

Those of ordinary skill in the art should understand that the above-mentioned various features can be appropriately changed and modified, and the combination between them can be arbitrary, and is not limited to the above-mentioned specific embodiments.

Although exemplary embodiments of the scroll compressor according to the present disclosure are described in the foregoing embodiments, the present disclosure is not limited thereto, but various modifications can be made without departing from the protection scope of the present disclosure. Type, replacement and combination.

It is obvious that by combining or modifying different embodiments and various technical features in different ways, various different embodiments can be further designed.

The scroll compressor according to the preferred embodiment of the present disclosure is described above in conjunction with the specific embodiments. It can be understood that the above description is only exemplary and not restrictive. Without departing from the scope of the present disclosure, those skilled in the art can conceive of various variations and modifications with reference to the above description. These variations and modifications are also included in the protection scope of the present disclosure.

Claims

A scroll compressor, the scroll compressor (1) includes:

A compression mechanism (CM), which is adapted to compress a working fluid and includes a movable scroll (24) with a drive coupling (240);

A drive shaft (16), the drive shaft is adapted to drive the compression mechanism, the drive shaft includes a drive portion, and the drive portion is drivingly engaged with the drive coupling portion so that the drive shaft can drive the movable scroll Spin

A main bearing seat (40) adapted to support the compression mechanism and the drive shaft, the main bearing seat defines a cavity, and lubricating oil accumulates in the cavity to have a normal oil level; as well as

A bushing (51), the bushing being arranged between the driving coupling part and the driving part; and

The counterweight member (50), the counterweight member defines a rotation axis, the counterweight member can rotate around the rotation axis, and the counterweight member includes the A base integrally formed by the bush and a weight portion (502) extending from the base, the weight portion being located in the cavity and rotating around the rotation axis as the drive shaft rotates Thereby there is an oil stirring surface (5022) as the windward surface,

It is characterized in that, taking the dividing line (D) corresponding to the normal oil level as the boundary, the oil stirring surface includes a lower surface (F2) adjacent to the base and an upper surface (F1) away from the base , Wherein the oil stirring surface is configured such that the projection area of the upper surface projected to the projection reference surface along the rotation direction of the weight member is larger than the projection area of the lower surface projected to the projection reference surface along the rotation direction The projection area of the projection reference surface, which is a virtual plane parallel to the rotation axis of the counterweight member and passing through the intersection line of the oil stirring surface and the top surface of the base.
The scroll compressor according to claim 1, wherein the oil stirring surface is configured such that the ratio of the projected area of the upper surface to the projected area of the lower surface is greater than or equal to 1.15.
The scroll compressor according to claim 1, wherein the oil stirring surface is configured such that the ratio of the projected area of the upper surface to the projected area of the lower surface is greater than or equal to 1.3.
The scroll compressor according to claim 1, wherein the scroll compressor further comprises an oil drain path (11 ), the oil drain path includes an opening provided at the peripheral wall of the main bearing housing, and the normal oil level is aligned with the opening.
The scroll compressor according to any one of claims 1 to 4, wherein the counterweight portion has an upper end portion (5024) away from the base and a lower end portion (5026) adjacent to the base. ), the upper end portion (5024) protrudes toward the front side of the rotation direction of the counterweight portion relative to the lower end portion (5026).
The scroll compressor according to claim 5, wherein the angle formed by each part of the oil stirring surface and the lower edge (5021) of the counterweight is greater than 90°.
The scroll compressor according to claim 5, wherein the oil stirring surface comprises a convex arc surface, a concave arc surface, a flat surface, a step surface or a combination thereof.
The scroll compressor according to claim 1, wherein the base is a ring-shaped mounting portion (501), and the ring-shaped mounting portion is sleeved on the outside of the bushing to interact with the bushing. Fixed installation.
The scroll compressor according to any one of claims 1 to 4, wherein at least one oil inlet (5027) is provided on the oil stirring surface, and the top end surface of the counterweight portion is provided At least one oil outlet (5028), and at least one oil passage (5029) extending from the at least one oil inlet to the at least one oil outlet is provided in the counterweight portion.
The scroll compressor according to claim 9, wherein the at least one oil passage extends along the direction of the rotation axis of the counterweight member.
The scroll compressor according to claim 9, wherein the height of the counterweight portion is set so that: in the installed state of the counterweight member, in the direction of the axis of rotation of the counterweight member In the direction, the distance between the at least one oil outlet and the thrust surface (422) of the main bearing housing (40) that is in sliding contact with the movable scroll is less than or equal to 5.5 mm.
The scroll compressor according to claim 11, wherein the counterweight member is configured such that the at least one oil outlet is located on the radially inner side of the thrust surface (422).