CN215949829U - Compressor - Google Patents

Abstract

The present invention relates to a compressor comprising: a housing having an oil sump therein; a compression mechanism for compressing a working fluid; a drive shaft having a first shaft end operatively coupled to the compression mechanism to drive the compression mechanism and a second shaft end adjacent the oil sump, the drive shaft including an oil supply passage; an oil pumping mechanism located at the second shaft end; the first pump cover is positioned on one side, opposite to the driving shaft, of the oil pumping mechanism; and an elastic bearing member that is attached to a fixed structure of the compressor and elastically supports a first pump cover in an axial direction of the drive shaft, the first pump cover being axially displaceable. The utility model adopts the elastic bearing piece to replace a screw fastener to provide elastic support, so that the first pump cover and the adjacent oil pumping mechanism thereof have axial flexibility to avoid damage caused by overlarge axial load, and can provide uniform supporting force, and the utility model has simple structure, easy installation, space saving and high cost benefit.

Description

Compressor

Technical Field

The present invention relates to the field of compressors.

Background

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

Compressors, such as scroll compressors, may be used in applications such as refrigeration systems, air conditioning systems, and heat pump systems. The scroll compressor may include: the compressor includes a casing, and a compression mechanism, a drive shaft, an oil pumping mechanism, and a lubricating oil source and the like located at the bottom of the casing, which are accommodated in the casing, wherein a first shaft end of the drive shaft is operatively coupled to the compression mechanism to drive the compression mechanism to compress a working fluid, a second shaft end of the drive shaft is operatively coupled to the oil pumping mechanism, and the oil pumping mechanism supplies lubricating oil to an oil supply passage inside the drive shaft to further supply the lubricating oil to other components such as the compression mechanism by centrifugal action of rotation of the drive shaft.

In the currently common compressor, for example, three fastening screws are usually used to fix the oil pumping mechanism and its related accessories at the lower end of the bottom bearing seat for bearing the driving shaft, i.e., the outside of the bottom bearing seat, this configuration not only takes up more space, but also is inconvenient to install, and the load from the driving shaft finally acts on the fastening screws and the oil pumping mechanism and its related accessories via the bottom bearing seat, when some relatively large load, for example, a balance weight is installed for the driving shaft, the acting force can reach 10 tons, and the oil pumping mechanism and its related accessories can not bear the large load and are easily damaged; furthermore, the configuration of the fastening screw is such that the oil pumping mechanism has no play in the axial direction along the drive shaft, which puts higher demands on the precision in the design and installation of other components, such as the drive shaft and the bearing parts for bearing the drive shaft, such as shoulders, bearings, etc., since in the event of errors, which lead to an unreasonable axial fit design or which are insufficient to provide the required bearing force, the oil pumping mechanism may be subjected to excessive stress and even damaged, especially in the case of a vertical compressor, since the oil pumping mechanism in a vertical compressor is usually mounted at the bottom in the compressor housing so as to be close to the source of lubricating oil, in the event of similar errors, an extremely high load will eventually be applied to the oil pumping mechanism at the bottom, which may lead to damage of the oil pumping mechanism.

Accordingly, it is desirable to provide an improved compressor that facilitates installation of an oil pumping mechanism and is more compact, while improving safety and reliability.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a compressor capable of providing an elastic support to an oil pumping mechanism to provide the oil pumping mechanism with a certain axial flexibility, thereby effectively preventing the oil pumping mechanism from being damaged by an excessive axial load.

Another object of the present invention is to provide a compressor which is easy to assemble, facilitates the design and assembly of the parts, and is more compact.

Specifically, the present invention provides a compressor comprising:

a housing having an oil sump therein;

a compression mechanism disposed in the housing and configured to compress a working fluid;

a drive shaft having a first shaft end operatively coupled to the compression mechanism to drive the compression mechanism and a second shaft end adjacent the oil sump, and an interior of the drive shaft including an oil supply passage;

an oil pumping mechanism located at the second axial end and including a stator and a rotor rotating relative to the stator for pumping lubricant in the oil sump into the oil supply passage;

a first pump cover located on a side of the oil pumping mechanism opposite the drive shaft; and

an elastic bearing member that is attached to a fixed structure of the compressor and elastically supports the first pump cover in an axial direction of the drive shaft, the first pump cover being axially displaceable.

In the compressor according to the utility model, the elastic bearing piece is adopted to replace other fasteners, such as screw fasteners, to provide elastic support for the first pump cover, so that the first pump cover has certain axial flexibility and can be axially displaced, and therefore, the first pump cover and an adjacent oil pumping mechanism are effectively prevented from being damaged due to excessive axial load.

According to a preferred embodiment of the present invention, the compressor further includes a bottom bearing housing for rotatably carrying the drive shaft via a bearing, the bottom bearing housing serving as the fixed structure, the bottom bearing housing including a receiving space extending through the bottom bearing housing in the axial direction, the oil pumping mechanism, the first pump cover, and the elastic carrier being entirely accommodated in the receiving space.

According to a preferred embodiment of the present invention, the first pump cover is fixedly attached to the stator, and the oil pumping mechanism and the first pump cover are axially displaceable together.

According to a preferred embodiment of the present invention, the elastic bearing is configured to provide elastic support to the first pump cover at a plurality of support portions evenly distributed in the circumferential direction.

According to a preferred embodiment of the utility model, the elastic carrier is a ring-shaped wave spring, the wave structure of which provides elastic support at the plurality of support portions.

According to a preferred embodiment of the present invention, the wave spring is fixed to the bottom housing by interference fit; or the inner peripheral wall of the receiving space comprises an annular groove, and the wave spring is fixed to the bottom bearing seat by being clamped in the annular groove.

According to a preferred embodiment of the utility model, the wave spring is formed as a closed loop member in one or more stacked layers from a single piece of sheet material that is lapped around.

According to a preferred embodiment of the present invention, the elastic carrier includes a body and a plurality of elastic claws extending from the body toward the first pump cover, the plurality of elastic claws providing elastic support at the plurality of support portions.

According to a preferred embodiment of the utility model, the body is made as a cylinder from sheet metal and is fixed to the bottom housing by interference fit.

According to a preferred embodiment of the present invention, the elastic carrier further includes a plurality of catching portions extending radially outward from the body, an inner peripheral wall of the receiving space of the bottom housing is provided with catching grooves in which the plurality of catching portions can be caught, thereby fixing the elastic carrier to the bottom housing.

According to a preferred embodiment of the utility model, the compressor further comprises an oil filter member accommodated in the receiving space and located on a side of the elastic carrier remote from the oil pumping mechanism, the oil filter member being formed separately or integrally with the elastic carrier.

In summary, the compressor according to the present invention provides at least the following advantageous technical effects: in the compressor, the elastic bearing part is adopted to replace a screw fastener to provide elastic support for the oil pumping mechanism, so that the oil pumping mechanism has certain axial flexibility, the damage of the oil pumping mechanism caused by bearing of overlarge axial load can be effectively avoided, the elastic bearing part can provide more uniform supporting force for the oil pumping mechanism, the structure is simple, the installation is easy, the space is saved, the cost benefit is higher, and meanwhile, the oil pumping mechanism and related parts thereof can be accommodated in the bottom bearing seat, so that the structure is more compact.

Drawings

The foregoing and additional features and characteristics of the present invention will become more apparent from the following detailed description, taken in conjunction with 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 shows a schematic longitudinal cross-sectional view of a scroll compressor according to a first embodiment of the present invention;

FIG. 2 shows an enlarged fragmentary view of the scroll compressor of FIG. 1 showing the bottom bearing housing to which the drive shaft and its second axial end are coupled, and the oil pumping mechanism, the first pump cover, and the elastomeric bearing, etc. disposed within the bottom bearing housing;

FIG. 3 shows a perspective view of the bottom bearing block assembly of FIG. 2, wherein the bottom bearing block assembly includes a bottom bearing block and an oil pumping mechanism, a first pump cover, an elastomeric bearing, etc., disposed within the bottom bearing block;

FIG. 4 shows an axial cross-sectional view of the bottom bearing block assembly of FIG. 3;

FIG. 5 illustrates a perspective view of the oil pumping mechanism of FIG. 4 and its associated components;

FIG. 6 illustrates an axial cross-sectional view of the oil pumping mechanism of FIG. 5 and its associated components;

FIG. 7a shows a perspective view of the resilient bearing of the scroll compressor of the first embodiment of FIG. 1; figure 7b shows an axial top view of the resilient carrier of figure 7 a; figure 7c shows a side view of the resilient carrier of figure 7 a;

FIG. 8a shows a perspective view of an oil filter member of the scroll compressor of the first embodiment of FIG. 1; FIG. 8b shows an axial cross-sectional view of the oil filter member of FIG. 8 a;

FIG. 9a shows a perspective view of an elastomeric bearing of a scroll compressor in accordance with a second embodiment of the present invention; figure 9b shows an axial top view of the resilient carrier of figure 9 a; figure 9c shows a side view of the resilient carrier of figure 9 a; figure 9d shows an axial cross-sectional view of a bottom bearing block assembly comprising the resilient carrier of the second embodiment;

FIG. 10a shows a perspective view of an elastomeric bearing of a scroll compressor in accordance with a third embodiment of the present invention; figure 10b shows an axial top view of the resilient carrier of figure 10 a; figure 10c shows a side view of the resilient carrier of figure 10 a; figure 10d shows an axial cross-section of a bottom bearing block assembly comprising a third embodiment of the resilient carrier; and

FIG. 11a shows a perspective view of an elastomeric bearing of a scroll compressor in accordance with a fourth embodiment of the present invention; figure 11b shows an axial top view of the resilient carrier of figure 11 a;

figure 11c shows a side view of the resilient carrier of figure 11 a; figure 11d shows an axial cross-section of a bottom bearing block assembly comprising the resilient carrier of the fourth 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 compressor is illustratively shown as a vertical scroll compressor. However, the compressor according to the present invention is not limited to this type, and may be any suitable type of compressor, for example, a horizontal scroll compressor or other type of compressor, as long as the compressor is applicable to the technical solution within the scope covered by the present invention.

Fig. 1 shows a schematic longitudinal sectional view of a scroll compressor 1 according to a first embodiment of the present invention. First, the overall structure of a scroll compressor 1 according to a first embodiment of 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. The orbiting scroll 24 and the non-orbiting scroll 22 constitute a compression mechanism CM adapted to compress a working fluid (e.g., refrigerant). The non-orbiting scroll 22 includes a non-orbiting scroll end plate, a non-orbiting scroll wrap, and an exhaust port 220 at the center of the non-orbiting scroll; orbiting scroll 24 includes an orbiting scroll end plate, an orbiting scroll wrap extending from a first side of the orbiting scroll end plate, and a hub G extending from a second side of the driven scroll end plate. Defined within the compression mechanism CM are an open suction chamber in fluid communication with an intake port (not shown) of the compression mechanism CM, and a closed series of compression chambers formed by the engagement of the non-orbiting and orbiting scroll wraps for compressing a working fluid, the series of compression chambers comprising, in order from the radially outer side to the radially center along the profile direction of the wraps: low pressure chamber, medium pressure chamber, high pressure chamber.

An intake pipe for introducing a working fluid having a suction pressure (low pressure) into the housing 12 and an exhaust pipe 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 communicates to an intake port 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.

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. The first axial end 161 of the drive shaft 16 is operatively coupled to the hub portion G such that the drive shaft 16 can drive the orbiting scroll 24 to move relative to the non-orbiting scroll 22, the non-orbiting scroll 22 being mounted to the main bearing housing 11, for example, using mechanical fasteners, to restrict radial and circumferential movement of the non-orbiting scroll 22, but allowing some degree of axial translation of the non-orbiting scroll 22, an oldham structure (not shown) is provided at an outer peripheral portion of the orbiting scroll 24, which prevents rotational movement of the orbiting scroll 24, thereby ensuring translational orbiting movement of the orbiting scroll 24 relative to the non-orbiting scroll 22 about the rotational axis of the drive shaft 16 — that is, orbital movement of the central axis of the orbiting scroll 24 about the central axis of the non-orbiting scroll 22, but not rotational movement of the orbiting scroll 24, 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 components of the scroll compressor 1, such as the compression mechanism CM.

The drive shaft 16 may include an oil supply passage therein, preferably extending through the drive shaft 16 and preferably including a central bore 52 formed at a second axial end 162 of the drive shaft 16 and an eccentric bore 56, the eccentric bore 56 extending upwardly from the central bore 52 to a first axial end 161. Preferably, in the preferred embodiment of the present invention, the oil supply passage extends in the direction of the rotation axis of the drive shaft 16 as a whole (including the central hole 52 and the eccentric hole 56), but it should be understood that the compressor of the present invention is not limited thereto, and the oil supply passage may be inclined at least partially with respect to the rotation axis of the drive shaft 16, and may even be curved, meandering, and may be designed according to practical use. The second shaft end 162 having the central bore 52 may be immersed in the bottom sump OR of the housing 12 of the scroll compressor 1 to deliver lubricating oil from the bottom sump OR of the housing 12 to the first shaft end 161, for example, under the influence of centrifugal force generated by rotation of the drive shaft 16, and further to other components, such as the compression mechanism CM, for lubrication and cooling.

In particular, a bottom bearing housing 13 is provided at the second shaft end 162 of the drive shaft 16 for carrying the second shaft end 162 of the drive shaft 16, specifically, the bottom bearing housing 13 includes a receiving space 130 for receiving the second shaft end 162, and an oil pumping mechanism 17, a first pump cover 18, a second pump cover 10, an elastic carrier 19, an oil filtering member 20 are provided at a terminal end 1620 of the second shaft end 162. As can be seen from fig. 1, in the preferred embodiment of the present invention, the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the oil filtering member 20 are all disposed in the receiving space 130 of the bottom bearing block 13, and therefore, for convenience of description, the bottom bearing block 13 and the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the oil filtering member 20 disposed inside the bottom bearing block 13 are also collectively referred to as a bottom bearing block assembly herein. The bottom bearing block assembly and its fitting with the drive shaft 16 will be described in detail below with reference to fig. 2 to 4.

FIG. 2 illustrates an enlarged partial view of the scroll compressor 1 of FIG. 1 showing the drive shaft 16 and its bottom bearing block assembly with the second axial end 162 coupled thereto; FIG. 3 illustrates a perspective view of the bottom bearing block assembly of FIG. 2; FIG. 4 shows an axial cross-sectional view of the bottom bearing block assembly of FIG. 3.

First, as shown in fig. 2 and 4, the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the oil filtering member 20 of the present invention are all disposed in the receiving space 130 of the base bearing housing 13, which is different from the conventional design in the related art in which the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10 are fixed to the base bearing housing 13 at the lower end portion of the base bearing housing 13 (i.e., outside of the receiving space 130) using, for example, three fastening screws, which not only occupies more space but is inconvenient to install, and further, a load from the drive shaft 16 is finally applied to the fastening screws and the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10 connected thereto via the base bearing housing 13, and when some relatively large load (for example, when a weight is attached to the drive shaft 16, the applied force may be up to 10 tons), while the oil pumping mechanism 17 and its related components cannot bear such a large load, are easily damaged. Therefore, in the present invention, as shown in fig. 2 and 4, the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the oil filter member 20 are all disposed in the receiving space 130 of the base bearing housing 13, and the lower end portion of the base bearing housing 13 directly abuts against the bottom surface of the housing 12 to receive the load, so that not only is it easy to mount and more compact in structure, but also the base bearing housing 13 can receive the load more stably, improving reliability.

Further, as shown in fig. 2-4, the second shaft end 162 of the drive shaft 16 includes a first shaft shoulder 164 and a second shaft shoulder 166, wherein the second shaft end 162 is received in the receiving space 130 of the bottom bearing housing 13 from the first shaft shoulder 164 — preferably, a bearing 136 is disposed between the second shaft end 162 and the receiving space 130 — the bearing 136 rotates with the drive shaft 16 (as better shown in fig. 4), and the first shaft shoulder 164 is seated on the flange end face 132 of the bottom bearing housing 13 (as better shown in fig. 3) -preferably, the center of the flange end face 132 includes an annular recess 134, an annular spacer 135 is disposed in the annular recess 134, the annular spacer 135 abutting the first shaft shoulder 164; a terminal end 1620 extending downward from the second shoulder 166 forming the second shaft end 162, the terminal end 1620 operably coupled to the oil pumping mechanism 17, wherein preferably, as best shown in fig. 6, a side of the oil pumping mechanism 17 remote from the drive shaft 16 is provided with a first pump cover 18, a side of the oil pumping mechanism 17 adjacent to the drive shaft 16 is provided with a second pump cover 10, and the first pump cover 18 and the second pump cover 10 are used for better sealing the oil pumping mechanism 17. Generally, the receiving space 130 of the bottom bearing housing 13 includes a small diameter section 13A adjacent to the drive shaft 16 and a large diameter section 13B remote from the drive shaft 16, the small diameter section 13A is for accommodating the drive shaft 16, the large diameter section 13B is for accommodating the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the like, and a limiting step 133 is included between the small diameter section 13A and the large diameter section 13B, the limiting step 133 being used for limiting the oil pumping mechanism 17, the first pump cover 18, the second pump cover 10, the elastic carrier 19, and the like in the large diameter section 13B.

And as can be seen from fig. 2, there is a certain clearance between the second shoulder 166 and the second pump cover 10 of the oil pumping mechanism 17, and preferably, the stopping step portion 133 abuts the upper surface of the second pump cover 10 to prevent the oil pumping mechanism 17 and its two pump covers 18 and 10 from moving into the small diameter section 13A to approach the second shoulder 166, thereby ensuring a clearance between the second shoulder 166 and the oil pumping mechanism 17 and its two pump covers 18 and 10. Thus, with proper design and assembly, axial loads from the drive shaft 16 act on the flange end face 132 of the base bearing block 13 via the first shoulder 164 without acting on the pumping mechanism 17 and its two pump covers 18 and 10, and in some cases, with the drive shaft 16 moving down slightly, the gap between the second shoulder 166 and the pumping mechanism 17 can also provide some cushioning without applying excessive pressure to the pumping mechanism 17 and its two pump covers 18 and 10. However, since there are many parts inside the compressor, it is necessary that the design and assembly of each part meet a high precision requirement, and if some error occurs in one of the links, the assembly may not meet the requirement, for example, a gap between the second shoulder 166 and the second pump cover 10 of the oil pumping mechanism 17 may be too small, so that an excessive pressure may be applied to the oil pumping mechanism 17 and the two pump covers 18 and 10 thereof; alternatively, even with proper design and fit, the drive shaft 16 may exert excessive pressure on the pumping mechanism 17 and its two pump covers 18 and 10 when some extreme conditions occur.

In the face of this situation, it is desirable to provide the pumping mechanism 17 and its associated components with adequate axial flexibility to cushion against excessive axial forces. To this end, the present invention is designed to employ the elastic bearing 19 to provide the oil pumping mechanism 17 with appropriate axial flexibility, and preferably, the elastic bearing 19 of the present invention is configured to provide elastic support to the first pump cover 18 in a plurality of support portions evenly distributed in the circumferential direction. Specifically, as shown in fig. 2 and 4, an elastic bearing 19 is provided below the first pump cover 18 and supports the first pump cover 18, the elastic bearing 19 is configured as an annular wave spring (which will be described in detail below) in the present embodiment, and is snapped into an annular groove 137 of the inner circumferential wall of the receiving space 130 as shown in fig. 2 and 4 to abut against the bottom surface of the first pump cover 18, since the elastic bearing 19 of the annular wave spring is elastically deformable upon receiving an axial force, the first pump cover 18 is allowed to move downward in the axial direction away from the drive shaft 16 in accordance with the elastic deformation of the elastic bearing 19, and after the axial force disappears, the elastic bearing 19 is elastically restored to urge the first pump cover 18 to move back upward, thereby allowing the first pump cover 18 to be axially displaced reciprocally in the axial direction of the drive shaft 16, thereby, it is possible to provide the oil pumping mechanism 17 disposed above the first pump cover 18 with a certain axial flexibility, that is, it is possible to push the first pump cover 18 and the elastic carrier 19 downward when the oil pumping mechanism 17 is subjected to an excessive axial force, thereby unloading a part of the force by the elastic deformation of the elastic carrier 19; preferably, in the preferred embodiment of the present invention, the oil pumping mechanism 17 is supported only by the first pump cover 18 so as to be axially displaceable along with the first pump cover 18; more preferably, as shown in fig. 5 and 6, the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10 are combined into one piece, thereby improving the integrity and sealability, and saving space and facilitating installation. As shown in fig. 5 and 6, it is preferable that corresponding mounting holes H1, H2, H3 be provided in the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10, respectively, and the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10 are fixed as an integral assembly by using a rolled elastic pin S passing through the mounting holes H1, H2, H3, whereby the oil pumping mechanism 17, the first pump cover 18, and the second pump cover 10 are axially displaced together along with the elastic deformation of the elastic carrier 19. It should be understood that any other suitable fastener may be used in place of the rolled spring pin S. Specifically, referring to fig. 6, the oil pumping mechanism 17 may include, for example, a rotor 171 connected to a terminal end 1620 of the second shaft end 162 and rotating with the terminal end 1620, and a stator 172 disposed around the rotor, and likewise, the rotation of the rotor 171 generates agitation and centrifugal action on the lubricating oil to supply the lubricating oil to the second shaft end 162 of the drive shaft 16, and the mounting hole H1 of the oil pumping mechanism 17 is disposed in the stator 172.

Figure 7a shows a perspective view of the resilient carrier 19 of the scroll compressor 1 of the first embodiment of figure 1; fig. 7b shows an axial top view of the elastic carrier 19 from fig. 7 a; fig. 7c shows a side view of the elastic carrier 19 from fig. 7 a. The elastic bearing 19 is configured as a ring-shaped wave spring in the present embodiment, the wave spring is formed by single sheet material being overlapped around to form a closed ring member with one or more layers, which may be determined according to actual needs, for example, as shown in fig. 7a to 7c, the wave spring is formed by single sheet material being overlapped around to form a closed ring member with two layers, in particular, as shown in fig. 7c, because the wave structure provides elastic support at a plurality of support portions evenly distributed along the circumferential direction, compared to the prior art configuration in which the first pump cover is fastened by three screws, for example, the wave spring applies a more evenly distributed support force to the first pump cover 18, so that the sealing performance of the first pump cover 18 and the second pump cover 10 to the oil pumping mechanism 17 can also be improved.

It should be understood that this wave spring configuration is only a preferred example, and that other configurations of elastic members may be used, and that such wave springs may be secured to the bottom bearing block 13 or supported by other components (e.g., the oil filter member 20, etc.) in any other suitable manner, such as by interference fit, or may be integrated with other components (e.g., the oil filter member 20, the first pump cover 18) as a single piece (e.g., by welding, integral molding, etc.), as long as axial flexibility is provided to the first pump cover 18, the oil pumping mechanism 17, as described above.

Figure 8a shows a perspective view of the oil filter member 20 of the scroll compressor 1 of the first embodiment of figure 1; fig. 8b shows an axial cross-section of the oil filter member 20 in fig. 8 a. As shown in the drawings, the oil filter member 20 is generally cylindrical, and specifically includes a double-layered cylindrical support body 202 and a circular filter screen 204, wherein the support body 202 includes an inner side wall 201 and an outer side wall 203, and an outer peripheral edge 2040 of the filter screen 204 is held between the inner side wall 201 and the outer side wall 203 of the support body 202. In particular, it is common in the prior art to arrange the oil filter member outside the base housing, which not only takes up more space, but also does not facilitate the fitting of the base housing. In the present invention, the elastic bearing 19 replaces the screw fastening that is usually used in the prior art, thereby saving a significant amount of space, so that the oil filter member 20 can also be arranged inside the base bearing block 13, thereby making the structure more compact, and thereby also facilitating the fitting of the base bearing block 13, in particular, as shown in fig. 3 and 4, the end of the base bearing block 13 that is mounted away from the drive shaft 16 may have a larger guide angle 138 for facilitating the fitting.

It should be understood that although the embodiment of the present invention shows that the oil filter member 20 is also arranged inside the bottom bearing block 13, this is not essential, and the oil filter member 20 may of course be arranged outside the bottom bearing block 13 in any other suitable position, depending on the actual needs.

Figure 9a shows a perspective view of the resilient carrier 19 of the scroll compressor 1 according to the second embodiment of the present invention; fig. 9b shows an axial top view of the elastic carrier 19 in fig. 9 a; fig. 9c shows a side view of the elastic carrier 19 in fig. 9 a; figure 9d shows an axial cross-section of the bottom bearing block assembly comprising the resilient carrier 19 of the second embodiment.

The elastic carrier 19 of the second embodiment is configured to include: a cylindrical body 190 made of a plate material; a plurality of elastic claws 192 extending obliquely from the upper surface of the body 190 toward the first pump cover 18, the plurality of elastic claws 192 extending obliquely with respect to the axial direction of the drive shaft 16 being capable of elastic movement in the axial direction to elastically support the first pump cover 18, preferably the plurality of elastic claws 192 being evenly distributed in the circumferential direction to provide elastic support at a plurality of support portions evenly distributed in the circumferential direction, and more preferably the ends of the elastic claws 192 being preferably configured as platform-like support portions 1920 for abutting and stably supporting the first pump cover 18; and a plurality of catches 194 obliquely extending from the outer circumferential surface of the body 190, the plurality of catches 194 being caught into the catching grooves 139 of the inner circumferential wall of the receiving space 130, thereby fixing the elastic carrier 19 to the bottom bearing housing 13. Wherein, the catching groove 139 may be an annular groove or a plurality of dispersed grooves corresponding to the plurality of catching parts 194 one to one.

It should be understood that although the preferred embodiment of the present invention discloses a configuration for fixing the elastic carrier 19 to the bottom bearing block 13, the elastic carrier 19 may be fixed to any other suitable fixing structure of the compressor according to practical applications as long as the above technical objects of the present invention are achieved.

Figure 10a shows a perspective view of the resilient carrier 19 of the scroll compressor 1 according to a third embodiment of the present invention; fig. 10b shows an axial top view of the elastic carrier 19 in fig. 10 a; fig. 10c shows a side view of the elastic carrier 19 in fig. 10 a; figure 10d shows an axial cross-section of a bottom bearing block assembly comprising a third embodiment of the resilient carrier 19. The configuration of the elastic carrier 19 of the third embodiment is substantially the same as the elastic carrier 19 of the second embodiment, i.e. the elastic carrier 19 of the third embodiment also comprises: a cylindrical body 190 made of a plate material; a plurality of elastic claws 192 extending obliquely from the upper surface of the body 190 toward the first pump cover 18, the plurality of elastic claws 192 extending obliquely with respect to the axial direction of the drive shaft 16 being capable of elastic movement in the axial direction to elastically support the first pump cover 18, preferably the plurality of elastic claws 192 being evenly distributed in the circumferential direction to provide elastic support at a plurality of support portions evenly distributed in the circumferential direction, and more preferably the ends of the elastic claws 192 being configured as platform-shaped support portions 1920 for abutting and stably supporting the first pump cover 18; and a plurality of catches 194 obliquely extending from the outer circumferential surface of the body 190, the plurality of catches 194 being caught into the catching grooves 139 of the inner circumferential wall of the receiving space 130, thereby fixing the elastic carrier 19 to the bottom bearing housing 13. Wherein, the catching groove 139 may be an annular groove or a plurality of dispersed grooves corresponding to the plurality of catching parts 194 one to one.

The configuration of the elastic carrier 19 of the third embodiment differs from the elastic carrier 19 of the second embodiment in that: the plurality of elastic claws 192 of the elastic carrier 19 of the third embodiment are inclined at a smaller angle with respect to the axial direction of the drive shaft 16 and extend a longer length than the elastic claws 192 of the second embodiment, thereby causing, as better shown in fig. 10d, the plurality of elastic claws 192 to support the first pump cover 18 at a greater distance from the body 190 of the elastic carrier 19, which means that the magnitude of elastic deformation (i.e., the distance of axial movement) of the elastic claws 192 is greater, thereby causing the first pump cover 18, the oil pumping mechanism 17, to be axially displaced by a greater distance, i.e., greater axial flexibility; also, as better shown in fig. 10c, the body 190 of the elastic carrier 19 of the third embodiment incorporates a filter screen 204, similar to the configuration of the oil filter member 20 shown in fig. 8b — the oil filter member 20 specifically includes a double-layered cylindrical support body 202 and a circular filter screen 204, wherein the support body 202 includes an inner side wall 201 and an outer side wall 203, the outer periphery 2040 of the filter screen 204 is held between the inner side wall 201 and the outer side wall 203 of the support body 202, the body 190 of the elastic carrier 19 of the third embodiment is also configured as a double-layered structure as shown in fig. 10c — that is, includes an inner side wall and an outer side wall, and the outer periphery 2040 of the filter screen 204 is held between the inner side wall and the outer side wall of the body 190. That is, the body 190 of the elastic carrier 19 of the third embodiment includes (incorporates) the oil filter member 20.

Thereby by combining the elastic carrier 19 with the oil filter member 20. The bearing stability can be further improved, space can be further saved and the installation is more convenient. Instead of securing the elastic carrier 19 by the catch 194 snapping into the catch groove 139 of the inner circumferential wall of the receiving space 130, the elastic carrier 19 may be secured in any other suitable way.

For example, fig. 11a shows a perspective view of the elastic carrier 19 of a scroll compressor according to a fourth embodiment of the present invention; fig. 11b shows an axial top view of the elastic carrier 19 from fig. 11 a; fig. 11c shows a side view of the elastic carrier 19 in fig. 11 a; figure 11d shows an axial cross-section of a bottom bearing block assembly comprising a fourth embodiment of the resilient carrier 19. The configuration of the elastic carrier 19 of the fourth embodiment is substantially the same as the elastic carrier 19 of the third embodiment, and an oil filter member 20 is incorporated in the same configuration, with the only difference being that: the elastic carrier 19 of the fourth embodiment does not include the catch 194, but fixes the elastic carrier 19 by forming the body 190 of the elastic carrier 19 into an interference fit with the inner circumferential wall of the receiving space 130 of the base housing 13. This also simplifies the design of the elastic carrier 19.

Further, it is to be understood that the elastic carrier 19 may also be integrated with the first pump cover 18 as an integral member, for example, the elastic carrier 19 of the second to fourth embodiments may be integrated with the first pump cover 18 via a plurality of elastic claws 192 (particularly, platform-shaped supports 1920) thereof, for example, the elastic claws 192 (particularly, platform-shaped supports 1920) may be welded to the first pump cover 18, or integrally molded with the first pump cover 18, or the like, as long as elastic support of the first pump cover 18 is possible.

As a result of performing FEA stress analysis under a force of 10 tons for the compressor according to the preferred embodiment of the present invention, it has been found that, under the force of 10 tons, the bottom bearing housing 13, which is the final bearing force, does not yield, and the elastic bearing 19 can stably support the first pump cover 18 and the oil pumping mechanism 17, and due to the axial flexibility provided by the elastic bearing 19, excessive stress applied to the first pump cover 18, the oil pumping mechanism 17, and the second pump cover 10 can be effectively avoided, and a good buffering effect can be achieved. Therefore, the compressor of the utility model can remarkably improve the safety and the reliability, is convenient to install, has compact structure and technical advancement.

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

The 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 utility model. Such variations and modifications are also included in the scope of the present invention.

Claims (11)

1. A compressor, comprising:

a housing having an oil sump therein;

a compression mechanism disposed in the housing and configured to compress a working fluid;

a drive shaft having a first shaft end operatively coupled to the compression mechanism to drive the compression mechanism and a second shaft end adjacent the oil sump, and an interior of the drive shaft including an oil supply passage;

an oil pumping mechanism located at the second axial end and including a stator and a rotor rotating relative to the stator for pumping lubricant in the oil sump into the oil supply passage;

a first pump cover located on a side of the oil pumping mechanism opposite the drive shaft; and

an elastic bearing member that is attached to a fixed structure of the compressor and elastically supports the first pump cover in an axial direction of the drive shaft, the first pump cover being axially displaceable.

2. The compressor of claim 1, further comprising a bottom bearing housing for rotatably carrying the drive shaft via a bearing, the bottom bearing housing serving as the fixed structure,

the bottom bearing seat comprises an accommodating space which extends through the bottom bearing seat along the axial direction, and the oil pumping mechanism, the first pump cover and the elastic bearing piece are completely accommodated in the accommodating space.

3. The compressor of claim 2,

the first pump cover is fixedly connected to the stator, and the oil pumping mechanism and the first pump cover can axially displace together.

4. The compressor of claim 2, wherein the resilient bearing is configured to provide resilient support to the first pump cover at a plurality of supports evenly distributed in a circumferential direction.

5. The compressor of claim 4, wherein the resilient carrier is an annular wave spring, the wave structure of the wave spring providing resilient support at the plurality of supports.

6. The compressor of claim 5, wherein the wave spring is secured to the bottom bearing housing by an interference fit; or the inner peripheral wall of the receiving space comprises an annular groove, and the wave spring is fixed to the bottom bearing seat by being clamped in the annular groove.

7. The compressor of claim 5 wherein the wave spring is formed as one or more stacked closed annular members in one or more layers by a single piece of sheet material being wrapped around.

8. The compressor of claim 4, wherein the resilient carrier includes a body and a plurality of resilient fingers extending from the body toward the first pump cover, the plurality of resilient fingers providing resilient support at the plurality of supports.

9. The compressor of claim 8, wherein the body is made as a cylinder from sheet material and is secured to the bottom bearing housing by an interference fit.

10. The compressor of claim 8, wherein the resilient carrier further comprises a plurality of catches extending radially outward from the body,

the inner peripheral wall of the receiving space of the bottom bearing seat is provided with a clamping groove,

the plurality of clamping parts can be clamped in the clamping grooves, so that the elastic bearing piece is fixed to the bottom bearing seat.

11. Compressor according to any one of claims 2-10, further comprising an oil filter member accommodated in the receiving space and located on a side of the elastic carrier remote from the oil pumping mechanism,

the oil filter member is formed separately or integrally with the elastic carrier.

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