CN109209878B

CN109209878B - Crankshaft, pump body assembly, rotary compressor and refrigeration equipment

Info

Publication number: CN109209878B
Application number: CN201811251436.2A
Authority: CN
Inventors: 竺宁凯; 陈辉; 叶晓飞; 闫婷; 陈行; 黄海伟
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2018-10-25
Filing date: 2018-10-25
Publication date: 2024-05-07
Anticipated expiration: 2038-10-25
Also published as: CN109209878A

Abstract

The application provides a crankshaft, and a pump body assembly, a rotary compressor and refrigeration equipment provided with the crankshaft. The crankshaft comprises a long shaft, an eccentric part, a sealing disc and a short shaft which are sequentially arranged, wherein the long shaft, the eccentric part, the sealing disc and the short shaft are integrally arranged, the long shaft, the sealing disc and the short shaft are coaxial, and the axial orthographic projection of the eccentric part falls in the axial orthographic projection of the sealing disc. The crankshaft combines the crankshaft, the rolling rotor and the lower flange in the prior art, so that friction between a lower thrust surface of the crankshaft and the end surface of the lower flange is avoided, friction between the lower end surface of the rolling rotor and the end surface of the lower flange is avoided, friction between an inner circle of the rolling rotor and an outer circle of the crankshaft is avoided, the thrust friction surface is transferred to the outside of the working cavity, a pump body is allowed to have smaller clearance level, and stability and reliability of compressor work are optimized.

Description

Crankshaft, pump body assembly, rotary compressor and refrigeration equipment

Technical Field

The application relates to the technical field of compressors, in particular to a crankshaft, and also relates to a pump body assembly, a rotary compressor and refrigeration equipment with the crankshaft.

Background

The rotary compressor pump body component mainly comprises a rolling rotor, a sliding vane, a cylinder, an upper flange, a lower flange and a crankshaft. In the running process of the compressor, friction exists among the inner circle of the rolling rotor, the eccentric part outer circle of the crankshaft, the lower thrust surface of the crankshaft, the lower flange end surface, the lower end surface of the rolling rotor, the upper flange end surface of the rolling rotor, the outer circle of the rolling rotor, the sliding vane head, the outer circle of the rolling rotor, the inner circle of the cylinder and the like. The method particularly comprises the step of rubbing a lower flange end face by the lower end face of the rolling rotor (the condition that the upper end face of a baffle plate is rubbed by the lower end face of the rolling rotor exists in the multi-cylinder compressor) and belongs to the common problem in the reliability test of each large model of the compressor. This wear results in a rise in temperature, no longer perfect adhesion between finished surfaces in the pump body assembly, and an increase in power consumption. And the rolling rotor expands by heat to further deteriorate the wear, forming a vicious circle. A common solution in the industry is to increase the height clearance of the rolling rotor from the cylinder. However, the increase of the gap inevitably leads to the increase of leakage, and the method takes the performance attenuation as a cost, and takes the effect of not taking the effect of the root cause, and still cannot completely avoid abrasion under severe working conditions. How to effectively avoid the above problems while considering performance has been a concern for rotary compressor researchers.

Disclosure of Invention

In order to solve the technical problems described above or at least partially solve the technical problems described above, the present application provides a crankshaft, and a pump body assembly, a rotary compressor and a refrigeration apparatus to which the crankshaft is mounted.

In order to achieve the above object, according to one aspect of the present invention, there is provided a crankshaft.

The crankshaft comprises a long shaft, an eccentric part, a sealing disc and a short shaft which are sequentially arranged, wherein the long shaft, the eccentric part, the sealing disc and the short shaft are integrally arranged, the long shaft, the sealing disc and the short shaft are coaxial, and the axial orthographic projection of the eccentric part is located in the axial orthographic projection of the sealing disc.

Further, the sealing disk is closely attached to the eccentric portion.

Further, the outer cylindrical surface of the eccentric portion forms a rolling piston working surface.

Further, a boss is formed on one side of the sealing disk facing away from the eccentric portion.

Further, the boss is a cylinder coaxial with the short axis.

In order to achieve the above object, according to a second aspect of the present technical solution, the present technical solution further provides a pump body assembly.

The pump body assembly comprises a crankshaft, an upper flange, a cylinder and a lower flange, wherein the upper flange, the cylinder and the lower flange are sequentially arranged along the crankshaft, the crankshaft is provided by the embodiment of the application, the eccentric part is positioned in a working cavity of the cylinder, and the outer cylindrical surface of the eccentric part is tangent to the inner side wall of the working cavity.

Further, a sealing groove is formed in the lower flange, and the outer edge of the sealing disc is in sealing connection with the inner wall of the sealing groove.

Further, the end face of the sealing disc is used as a thrust surface to be in contact with the bottom face of the sealing groove.

Further, the upper flange and the lower flange are fixedly connected with the air cylinder through screws.

Further, the pump body assembly further comprises a sliding vane, an elastic piece and a sliding vane groove formed in the air cylinder, wherein the sliding vane slides along the sliding vane groove, and one end of the sliding vane is propped against the eccentric part under the action of the elastic force of the elastic piece.

Further, the elastic piece is a spring, a spring hole is formed in the air cylinder, a clamping groove is formed in the tail end of the sliding piece, and two ends of the spring are located in the spring hole and the clamping groove respectively.

In order to achieve the above object, according to a third aspect of the present invention, there is also provided a rotary compressor.

The rotary compressor comprises the pump body assembly provided by the document.

In order to achieve the above object, according to a fourth aspect of the present invention, there is also provided a refrigeration apparatus.

The refrigeration equipment comprises the rotary compressor provided by the application.

In the crankshaft provided by the technical scheme, and the pump body assembly, the rotary compressor and the refrigeration equipment provided with the crankshaft, the crankshaft combines the crankshaft, the rolling rotor and the lower flange in the prior art, so that friction between the lower thrust surface of the crankshaft and the end surface of the lower flange is avoided, friction between the lower end surface of the rolling rotor and the end surface of the lower flange is avoided, friction between the inner circle of the rolling rotor and the outer circle of the crankshaft is avoided, the thrust friction surface is transferred to the outside of the working cavity, smaller clearance level of the pump body is allowed, and the working stability and reliability of the compressor are optimized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application. In the drawings:

FIG. 1 schematically shows a perspective view of a crankshaft according to the present application;

FIG. 2 is a schematic perspective view showing a perspective view of the crankshaft of the present application;

FIG. 3 schematically illustrates a front view of a pump body assembly of the present application; and

Fig. 4 schematically shows an exploded view of a pump body assembly according to the present application.

In the figure:

1. A crankshaft; 101. a long axis; 102. a eccentric portion; 103. a sealing plate; 1031. a boss; 104. a short shaft; 2. an upper flange; 3. a cylinder; 4. a lower flange; 401. sealing grooves; 5. and (5) a screw.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the foregoing figures are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such article or apparatus.

In the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", and the like are based on the azimuth or positional relationship shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the accompanying drawings 1-4 in conjunction with examples.

As shown in fig. 1 and 2, a structural schematic diagram of a crankshaft is provided. The crankshaft in this embodiment particularly refers to a crankshaft structure for a rotary compressor, and aims to solve the problem of abrasion between the lower end face of the rolling rotor and the lower flange end face, between the lower thrust surface of the crankshaft and the lower flange end face, and between the outer circle of the eccentric portion of the crankshaft and the inner circle of the rolling rotor in the conventional rotary compressor.

As shown in fig. 1 and fig. 2, a crankshaft provided according to an embodiment of the present application includes a long shaft 101, an eccentric portion 102, a sealing disk 103, and a short shaft 104 that are sequentially disposed, where the long shaft 101, the eccentric portion 102, the sealing disk 103, and the short shaft 104 are integrally disposed, and an axial orthographic projection of the eccentric portion 102 falls within an axial orthographic projection of the sealing disk 103, where the long shaft 101, the sealing disk 103, and the short shaft 104 are coaxial.

In the above embodiment, the sealing plate 103 functions as a lower flange in the conventional rotary compressor. An integrated arrangement is understood to mean that the crankshaft does not undergo relative movement and wear between the components that make up it during movement. In the rotary compressor in the prior art, the rolling rotor and the lower thrust surface of the crankshaft are both rubbed with the cross section of the lower flange, but after the crankshaft in the embodiment of the application is applied to the rotary compressor, the crankshaft is equivalent to the original eccentric part of the crankshaft and the lower flange are combined together, so that the friction between the lower thrust surface of the crankshaft and the end surface of the lower flange in the prior art can be avoided, in the actual working process, the sealing disc 103 is arranged on the rotary compressor and used for sealing a cylinder to form a working cavity, the actual thrust surface can become the lower end surface of the sealing disc, and the thrust friction surface is transferred to the outside of the working cavity, so that the pump body can have a smaller clearance level. The embodiment is applied to the rotary compressor to reduce friction, reduce power consumption, reduce leakage and improve refrigerating capacity.

As a preferred embodiment, the sealing disk 103 is disposed in close contact with the eccentric portion 102; the axial orthographic projection of the long shaft 101 falls in the axial orthographic projection of the eccentric part 102, so that the arrangement can be more suitable for a rotary compressor, and the working cavity is divided into two chambers by a sliding vane structure in the rotary compressor.

As a preferred embodiment, the outer cylindrical surface of the eccentric portion 102 forms the rolling piston working surface. In the arrangement mode, the eccentric part 102 is actually the integral combination of the eccentric part of the crankshaft and the rolling rotor of the rotary compressor in the prior art, and on one hand, the original mode of combining the eccentric part of the crankshaft and the rolling rotor avoids the friction between the inner circle of the rolling rotor and the outer circle of the crankshaft; on the other hand, the movable rolling rotor is integrally arranged on the crankshaft, and the sealing disc 103 is added, which is equivalent to the combination of the original rolling rotor and the lower flange, so that the friction between the rolling rotor and the end face of the lower flange in the prior art can be avoided.

As shown in fig. 2, the sealing disk 103 includes a boss 1031 formed on a side thereof facing away from the eccentric portion 102. The end face of the boss 1031 is an actual thrust friction surface, and the area of the friction surface can be reduced by the arrangement, so that the friction of the lower end face of the whole sealing disc is avoided. Preferably, the boss 1031 is a cylinder coaxial with the stub shaft 104. The cylindrical structure is symmetrical along the center of the axis, so that the operation can be more stable and balanced in the rotating structure.

As shown in fig. 3 and 4, a schematic structural view of a pump body assembly is provided. The pump body assembly in the embodiment particularly refers to a pump body assembly structure for a rotary compressor, and the pump body assembly structure is applied to the crankshaft provided by the embodiment of the application.

Specifically, as shown in fig. 3 and fig. 4, the pump body assembly provided according to the embodiment of the present application includes a crankshaft 1, and an upper flange 2, a cylinder 3, and a lower flange 4 sequentially disposed along the crankshaft 1, where the crankshaft 1 is the crankshaft provided in the embodiment of the present application, the eccentric portion 102 is located in a working chamber of the cylinder 3, and an outer cylindrical surface of the eccentric portion 102 is tangent to an inner sidewall of the working chamber. Because the pump body assembly includes the crankshaft disclosed in the above embodiment, the pump body assembly having the crankshaft also has all the above technical effects, and will not be described in detail herein. In a specific working process, the upper flange 2 and the sealing disc 103 are used for sealing the cylinder 3 from two ends, a working cavity is formed in the cylinder 3, the lower end face of the sealing disc 103 is used as a thrust surface to rub against the end face of the lower flange, and therefore the friction part is transferred from the inside of the working cavity to the outside of the working cavity. The thrust friction surface is arranged outside the working cavity of the cylinder, so that the stability and reliability of the operation of the pump body of the compressor are ensured. The structure eliminates the abrasion condition in the pump body working cavity, so that smaller pump body clearance is allowed to be designed, leakage is reduced, and energy efficiency is improved.

As shown in fig. 4, a specific installation form of the sealing disc 103 is provided, a sealing groove 401 is formed on the lower flange 4, and the outer edge of the sealing disc 103 is in sealing connection with the inner wall of the sealing groove 401. Of course, the shape of the seal groove 401 should match the shape of the seal disk and should be cylindrical in shape. The seal between sealing disk 103 and sealing groove 401 is preferably a liquid seal, for example by lubricating oil. When the boss 1031 is formed on the seal disk 103, the end surface of the boss 1031 contacts the bottom surface of the seal groove 401 as a thrust surface.

Preferably, the upper flange 2 and the lower flange 4 are fixedly connected with the air cylinder 3 through screws 5, specifically, corresponding screw holes are formed in the upper flange and the air cylinder, the upper flange and the air cylinder are fixed through the upper screws, corresponding screw holes are formed in the lower flange and the air cylinder, and the upper flange and the air cylinder are fixed through the lower screws; in order to achieve a better fixing effect, the number of the upper screws and the lower screws is four.

As shown in fig. 4, the pump body assembly further includes a slide vane 6, an elastic member, and a slide vane groove 301 formed on the cylinder 3, wherein the slide vane 6 slides along the slide vane groove 301, and one end of the slide vane 6 is pressed against the eccentric portion 102 under the elastic force of the elastic member. The slide 6 and the eccentric 102 divide the working chamber into two parts. Preferably, the elastic piece is a spring, a spring hole is formed in the air cylinder, a clamping groove is formed in the tail end of the sliding sheet 6, and two ends of the spring are located in the spring hole and the clamping groove respectively.

The pump body assembly provided in the above embodiment may optionally include the following steps: firstly, centering an upper flange 2 and a cylinder 3 by using a standard crankshaft and a rolling rotor (namely a traditional crankshaft and a rolling rotor); then the crankshaft is arranged, and the eccentric part is positioned in the cylinder; finally, a newly designed lower flange is installed, so that the lower flange is centered.

The main difference between the above-mentioned assembly and the conventional assembly is that in the first step, it is necessary to use a standard crankshaft and a rolling rotor (i.e., a conventional crankshaft and a rolling rotor) for centering. Because, if the upper flange is centered with the crankshaft, the sealing disc will cover the working chamber, resulting in the inability to insert the slide.

It should be noted that, other structures and operations of the pump body assembly of the present application will be known to those skilled in the art, and reference is made to the pump body assembly structure of the rotary compressor in the prior art, and will not be described in detail herein.

In addition, the application also discloses a rotary compressor, which comprises the pump body assembly provided by the embodiment, and the pump body assembly is the pump body assembly disclosed in the embodiment, so that the rotary compressor with the pump body assembly also has all the technical effects and is not repeated herein. The rotary compressor according to the above embodiment may further include other necessary components or structures such as a housing assembly, a motor assembly, an air suction pipe, an air discharge valve, etc., and the corresponding arrangement positions and connection relationships may refer to the rotary compressor in the prior art, and the connection relationships, operation and operation principles of the respective non-mentioned structures will be known to those skilled in the art and will not be described in detail herein.

In addition, the application also discloses a refrigeration device comprising the rotary compressor, and the refrigeration device with the rotary compressor has all the technical effects because the rotary compressor is the rotary compressor disclosed in the embodiment, and the description is omitted herein.

The refrigerating apparatus according to the above-described embodiment may be a refrigerator or an air conditioner, etc., and other constitution and operation of the refrigerating apparatus will be known to those skilled in the art, and will not be described in detail herein.

In this specification, some embodiments are described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are enough to refer to each other.

The foregoing is only a specific embodiment of the invention to enable those skilled in the art to understand or practice the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a pump body subassembly, includes bent axle (1) and follows last flange (2), cylinder (3) and lower flange (4) that bent axle (1) set gradually, its characterized in that, the bent axle is including major axis (101), eccentric part (102), sealing disk (103) and minor axis (104) that set gradually, major axis (101), eccentric part (102), sealing disk (103) and minor axis (104) integration set up, major axis (101), sealing disk (103) and minor axis (104) coaxial line, the axial orthographic projection of eccentric part (102) falls in the axial orthographic projection of sealing disk (103), eccentric part (102) are located in the working chamber of cylinder (3), and its outer cylindrical surface with the working chamber inside wall is tangent, seal groove (401) have been seted up on lower flange (4), the outer fringe of sealing disk (103) with the inner wall sealing groove (401) sealing connection, the terminal surface of sealing disk (103) regard as the thrust surface with the bottom surface of sealing groove (401) contacts, sealing disk (103) and eccentric part (102) form the eccentric cylinder (102) is hugged closely.

2. Pump body assembly according to claim 1, characterized in that the sealing disk (103) comprises a boss (1031) formed on its side facing away from the eccentric (102).

3. Pump body assembly according to claim 2, wherein the boss (1031) is a cylinder coaxial with the stub shaft (104).

4. Pump body assembly according to claim 1, characterized in that the upper flange (2) and the lower flange (4) are both fixedly connected to the cylinder (3) by means of screws (5).

5. Pump body assembly according to claim 1, further comprising a slide (6), an elastic member and a slide groove (301) provided on the cylinder (3), wherein the slide (6) slides along the slide groove (301) and one end thereof is pressed against the eccentric portion (102) under the elastic force of the elastic member.

6. The pump body assembly according to claim 5, wherein the elastic member is a spring, a spring hole is formed in the cylinder, a clamping groove is formed in the tail end of the sliding sheet (6), and two ends of the spring are located in the spring hole and the clamping groove respectively.

7. A rotary compressor comprising the pump body assembly of any one of claims 1-6.

8. A refrigeration apparatus comprising the rotary compressor of claim 7.