CN110332115B

CN110332115B - Pump body assembly, compressor and heat pump system

Info

Publication number: CN110332115B
Application number: CN201910599054.7A
Authority: CN
Inventors: 翟元彬; 阙沛祯; 苗旺; 向柳; 赵逸; 马舒院
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2021-07-27
Anticipated expiration: 2039-07-04
Also published as: CN110332115A

Abstract

The application provides a pump body subassembly, compressor and heat pump system. The pump body assembly comprises at least two cylinders, wherein one cylinder is a variable-volume cylinder, the variable-volume cylinder comprises a first cylinder, the first cylinder is provided with a first working cavity, a first sliding sheet groove communicated with the first working cavity is formed in the first cylinder, a first sliding sheet is arranged in the first sliding sheet groove in a sliding mode, one side, facing the first working cavity, of the first sliding sheet is a head, one side, away from the first working cavity, of the first sliding sheet is a tail portion, the first sliding sheet groove comprises a tail groove matched with the tail portion of the first sliding sheet, the tail groove is sealed and can selectively introduce first pressure gas or second pressure gas, so that the working state or unloading state of the first sliding sheet is switched, a buffer member is arranged in the tail groove, and the buffer member is arranged on a sliding path of the first sliding sheet. According to the pump body assembly, abnormal abrasion and breakage between the sliding vane and the air cylinder can be effectively avoided, and the running reliability of the compressor is improved.

Description

Pump body assembly, compressor and heat pump system

Technical Field

The application relates to the technical field of air conditioning, in particular to a pump body assembly, a compressor and a heat pump system.

Background

The existing double-cylinder variable-capacity compressor generally adopts the introduced gas pressure to control the work and the unloading of a variable-capacity cylinder. The variable capacity compressor is provided in the prior art, the tail part of a lower sliding vane is sealed, a pin is arranged in a lower flange, the connection and the separation of the pin and the lower sliding vane can be realized under the pressure difference of the pin head part and the tail part by controlling the high pressure and the low pressure of the tail part of a lower sliding vane cavity, adjusting the pressure of the pin head part and always communicating the low pressure of an air suction port of an air cylinder, so that the switching of single cylinders and double cylinders is realized. In the working process of the compressor, the lower slider is always under the action of the pressure of the tail gas.

The scheme has the following problems: when the compressor double-cylinder is operated, the lower slip sheet compresses the roller under the action that the back gas force P is greater than the head pressure Ps, the double-cylinder of the compressor switches the single-cylinder process, because the pressure P at the tail part of the slip sheet is gradually reduced, when the back pressure P is less than the slip sheet centrifugal force and the slip sheet head pressure Ps, the separation and collision between the slip sheet and the roller can be generated, the slip sheet can be impacted to the tail end of a bottom hole of an air cylinder groove by the roller, abnormal sound is generated, and even abnormal abrasion and breakage are caused between the slip sheet and the air cylinder in serious conditions, so that the operation reliability of the compressor is seriously influenced.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a pump body subassembly, compressor and heat pump system, can effectively avoid the unusual wearing and tearing fracture between gleitbretter and the cylinder, improves the operational reliability of compressor.

In order to solve the problem, the application provides a pump body assembly, including two at least cylinders, one of them cylinder is the varactor, the varactor includes first cylinder, first cylinder has first working chamber, be provided with the first gleitbretter groove with first working chamber intercommunication on the first cylinder, it is provided with first gleitbretter to slide in the first gleitbretter groove, one side that first gleitbretter moves towards first working chamber is the head, one side that first working chamber was kept away from to first gleitbretter is the afterbody, first gleitbretter groove includes the afterbody complex tail groove with first gleitbretter, the tail groove is sealed and can let in first pressure gas or second pressure gas selectively, in order to realize the work of first gleitbretter or uninstallation state switching, be provided with the bolster in the tail groove, the bolster sets up on the slide path of first gleitbretter.

Preferably, when the first sliding piece is in the working state, the interaction force between the first sliding piece and the buffer member is zero, and when the first sliding piece completely slides into the first sliding piece groove, the first sliding piece and the buffer member start to contact with each other.

Preferably, the bolster includes elastic sealing element, and first cylinder radially offers the mounting hole with the tail groove intercommunication, and elastic sealing element includes sealing part and elastic component, and sealing part sets up in the mounting hole to sealed mounting hole, elastic component are located the tail groove, and stretch out towards first gleitbretter.

Preferably, the mounting hole has a countersink in which the seal is located.

Preferably, the sealing part is a sealing cover, the elastic part is a spring, and the spring is mounted on the sealing cover.

Preferably, the sealing part is a sealing cover, the elastic part is a spring, the tail groove is provided with a stopping step, one end of the spring is elastically abutted against the sealing cover, and the other end of the spring is elastically abutted against the stopping step; or one end of the spring is fixedly connected to the sealing cover, and the other end of the spring is elastically connected to the stopping step.

Preferably, the diameter of the spring is greater than the total length of the seal cap and the spring.

Preferably, the relationship between the diameter d of the spring and the axial height H of the first slide satisfies d ≧ H/2.

Preferably, a relationship between a height L1 of a center axis of the spring from a lower end surface of the first cylinder and an axial height H of the first vane satisfies L1 ═ H/2.

Preferably, the buffer member includes an elastic pad embedded in the tail groove.

Preferably, the side wall of the tail groove is matched with the shape of the embedding surface of the elastic pad; and/or the contact surface between the elastic pad and the first sliding piece is a plane.

According to another aspect of the present application, there is provided a compressor comprising the pump body assembly described above.

According to yet another aspect of the present application, there is provided a heat pump system including the compressor described above.

The utility model provides a pump body subassembly, including two at least cylinders, one of them cylinder is the varactor jar, the varactor jar includes first cylinder body, first cylinder body has first working chamber, be provided with the first gleitbretter groove with first working chamber intercommunication on the first cylinder body, it is provided with first gleitbretter to slide in the first gleitbretter groove, one side that first gleitbretter orientation first working chamber is the head, one side that first working chamber was kept away from to first gleitbretter is the afterbody, first gleitbretter groove includes the afterbody complex tail groove with first gleitbretter, the tail groove is sealed and can selectively let in first pressure gas or second pressure gas, with the work or the uninstallation state switching that realize first gleitbretter, the tail inslot is provided with the bolster, the bolster sets up on the slide path of first gleitbretter. In this pump body subassembly, the bolster has been increased in the tail tank, when carrying out the state switching in-process of first gleitbretter, if the afterbody pressure of first gleitbretter is less than gleitbretter centrifugal force and gleitbretter head pressure when, first gleitbretter can break away from the first roller in the first work intracavity, and slide towards the tail tank under the centrifugal force effect, in this process, because the existence of bolster, first gleitbretter can strike on the bolster, and cushion through the bolster, avoid first gleitbretter to slide and strike the cell wall of tail tank and produce the abnormal sound, avoid simultaneously taking place the striking and leading to taking place wearing and tearing cracked problem between first gleitbretter and the cylinder between the cell wall of first gleitbretter and tail tank, effectively improve the reliability when the compressor operation.

Drawings

Fig. 1 is a schematic structural view of a variable displacement cylinder of a pump body assembly according to an embodiment of the present application;

FIG. 2 is a schematic partial cross-sectional structural view of a displacement cylinder of a pump block assembly according to an embodiment of the present application;

FIG. 3 is a schematic structural view of a pump body assembly according to an embodiment of the present application;

FIG. 4 is a schematic structural view of another displacement cylinder of the pump body assembly of the embodiment of the present application;

fig. 5 is a schematic structural diagram of a compressor according to an embodiment of the present application.

The reference numerals are represented as:

1. an upper cover; 2. a pump body assembly; 3. a liquid separator; 4. a housing; 5. a lower cover; 6. a rotor; 7. a stator; 8. an elastic pad; 201. a second flange; 202. a second cylinder; 203. a partition plate; 204. a first cylinder; 205. a first flange; 206. pressing a plate; 207. a crankshaft; 208. a second roller; 209. a spring; 210. a second slip sheet; 211. a first roller; 212. a sealing part; 213. an elastic portion; 214. a first slip sheet; 215. a pin; 216. a pin spring; 217. a first slide groove; 218. a tail groove; 219. sinking a groove; 220. mounting holes; 221. a stop step.

Detailed Description

With reference to fig. 1 to 5, according to an embodiment of the present application, the pump body assembly includes at least two cylinders, one of the cylinders is a variable displacement cylinder, the variable displacement cylinder includes a first cylinder 204, the first cylinder 204 has a first working chamber, a first vane slot 217 is disposed on the first cylinder 204 and is communicated with the first working chamber, a first vane 214 is slidably disposed in the first vane slot 217, a head portion is disposed on a side of the first vane 214 facing the first working chamber, a tail portion is disposed on a side of the first vane 214 away from the first working chamber, the first vane slot 217 includes a tail slot 218 matched with the tail portion of the first vane 214, the tail slot 218 is sealed and can selectively introduce the first pressure gas or the second pressure gas to implement switching of the working state or the unloading state of the first vane 214, a buffer is disposed in the tail slot 218, and is disposed on a sliding path of the first vane 214. In this embodiment, the source of the first pressure gas may be a low pressure chamber gas of the compressor, and the source of the second pressure gas may be a high pressure chamber gas of the compressor.

In the pump body assembly, a buffer is added in the tail groove 218, when the state of the first sliding piece 214 is switched, if the tail pressure of the first sliding piece 214 is smaller than the sliding piece centrifugal force and the sliding piece head pressure, the first sliding piece 214 can be separated from the first roller 211 in the first working cavity and can slide towards the tail groove 218 under the action of the centrifugal force, in the process, due to the existence of the buffer, the first sliding piece 214 can impact on the buffer and can be buffered through the buffer, abnormal sound caused by the fact that the first sliding piece 214 slides to impact the groove wall of the tail groove 218 is avoided, meanwhile, the problem that abrasion and breakage occur between the first sliding piece 214 and the air cylinder due to the impact between the first sliding piece 214 and the groove wall of the tail groove 218 is avoided, and the reliability of the compressor in operation is effectively improved.

Preferably, when the first sliding piece 214 is in an operating state, the interaction force between the first sliding piece 214 and the buffer is zero, and when the first sliding piece 214 completely slides into the first sliding piece groove 217, the first sliding piece 214 and the buffer start to contact each other. Through setting up the relative position relation between first gleitbretter 214 and the bolster, can guarantee under first gleitbretter 214 normal operating condition, can not receive the effort of bolster, consequently can guarantee that first gleitbretter 214 keeps in contact with between first roller 211 under high-pressure gas's the effect all the time, has avoided the influence of external force, has improved the stability and the reliability of first gleitbretter 214 in whole course of the work. In the process of unloading first sliding vane 214, first sliding vane 214 slides into first sliding vane slot 217 completely under the action of roller driving force and centrifugal force, and then can continue to slide towards the tail end of tail slot 218, and when first sliding vane 214 slides into first sliding vane slot 217 completely, first sliding vane 214 and the buffer member begin to contact with each other, so that the maximum buffer distance between first sliding vane 214 and the buffer member can be ensured, and a better buffer effect is achieved, and sufficient buffer time and buffer distance are provided, and the first sliding vane 214 is prevented from impacting tail slot 218 more effectively.

In this embodiment, preferably, the buffer includes an elastic sealing element, the first cylinder 204 is radially opened with a mounting hole 220 communicating with the tail groove 218, the elastic sealing element includes a sealing portion 212 and an elastic portion 213, the sealing portion 212 is disposed in the mounting hole 220 and seals the mounting hole 220, and the elastic portion 213 is located in the tail groove 218 and extends toward the first sliding piece 214. The sealing portion 212 may be in interference fit with the mounting hole 220, or may be fixed to the mounting hole 220 by bolting or welding. Sealant can be coated between the sealing part 212 and the mounting hole 220, so that the sealing effect between the sealing part 212 and the mounting hole 220 is further improved.

This bolster adopts elastic sealing element to realize the buffering to first gleitbretter 214, can utilize elastic sealing element's elastic action to play better buffering effect to first gleitbretter 214. The elastic seal member is radially installed in the tail groove 218, so that an installation hole 220 needs to be opened on the radial outer side of the elastic seal member to realize installation and fixation of the elastic seal member. After the installation of the elastic sealing member is completed, the elastic sealing member can seal the installation hole 220, so that the sealing effect of the tail groove 218 is still not affected, and the switching of the working state and the unloading state of the first sliding piece 214 can be realized by continuously and effectively utilizing the switching of the high-pressure gas and the low-pressure gas.

Preferably, the mounting hole 220 has a counterbore 219, and the seal 212 is located in the counterbore 219. The sealing part 212 is arranged in the sinking groove 219, so that the sealing part 212 can be prevented from being exposed outside the cylinder, the sealing part 212 can be conveniently mounted and fixed on the first cylinder 204, the sealing part 212 can be prevented from being located outside and interfering with other structures, and the reasonability of the layout is improved.

The sealing part 212 may be a sealing cap, and the elastic part 213 may be a spring mounted on the sealing cap. In this embodiment, the sealing cover may be an elastic structure, and may form an elastic seal for the mounting hole 220, so as to further improve the sealing effect, and isolate the pressure at the tail of the first sliding piece 214 from the pressure inside the housing. In addition, the spring is installed on the sealing cover, and the other end of the spring can be suspended, so that the installation and the positioning of the spring are facilitated.

In this embodiment, the sealing portion 212 is a sealing cover, the elastic portion 213 is a spring, the tail groove 218 is provided with a stopping step 221, one end of the spring elastically abuts against the sealing cover, and the other end elastically abuts against the stopping step 221. In this embodiment, both ends of the spring are not connected, a spring hole is formed in the wall of the first cylinder 204, and after the spring passes through the spring hole, one end of the spring abuts against the sealing cover, and the other end of the spring abuts against the stopping step 221, so that the mounting and fixing of the spring are completed. Through the degree of depth that sets up backstop step 221 rationally, can conveniently restrict the extension length of spring for the extension length of spring sets up more accurately, realizes more effectively that first gleitbretter 214 is when operating condition, and the interact power is zero between first gleitbretter 214 and the bolster, and when first gleitbretter 214 slided into first gleitbretter groove 217 completely, this settlement of beginning contact between first gleitbretter 214 and the bolster.

In another embodiment, one end of the spring is fixedly connected to the sealing cap, and the other end is elastically connected to the stopping step 221. In this embodiment, one end of the spring is fixedly connected to the sealing cover, and the other end of the spring is suspended and abuts against the stopping step 221, so that the axial limiting is formed by the stopping step 221.

In addition, adopt backstop step 221 to carry on spacingly to the spring, can be so that the spring has certain pre-compaction effort, so, when taking place to contact between first gleitbretter 214 and the spring, can provide bigger elastic action through the spring, provide bigger cushioning effect, play better elastic cushioning effect.

Adopt the cylinder afterbody to set up spring or other similar elastic construction, and adopt the sealed tail groove 218 of lid of elasticity, make outer tail groove 218 isolated with casing internal back pressure, when the single cylinder mode of compressor double-cylinder switching, the spring can increase the pressure at gleitbretter back, prevent that first gleitbretter 214 from breaking away from with first roller 211 because of the backpressure is not enough, slow down the speed that first gleitbretter 214 returned when first gleitbretter 214 receives first roller 211 striking simultaneously, play the effect of buffering first gleitbretter 214, prevent that first gleitbretter 214 from striking the tail groove 218 of first cylinder 204, the reliability of first gleitbretter 214 and first cylinder 204 has been improved by a wide margin.

Preferably, the diameter of the spring is larger than the total length of the sealing cover and the spring, so that the first sliding piece 214 can be prevented from deforming and dislocating the spring when impacting the spring, and the structural reliability is improved.

Preferably, the relationship between the diameter d of the spring and the axial height H of the first vane 214 is such that d ≧ H/2.

More preferably, the relationship between the height L1 of the center axis of the spring from the lower end surface of the first cylinder 204 and the axial height H of the first vane 214 satisfies L1 ═ H/2. Through setting up the position of spring and the relation between the axial height with first gleitbretter 214, can make the interaction point between first gleitbretter 214 and the spring all be located central point to when avoiding taking place the interaction force between first gleitbretter 214 and the spring, first gleitbretter 214 receives the eccentric effort of spring and takes place to deflect, improves first gleitbretter 214's atress equilibrium nature.

In this embodiment, the pump body assembly further includes a second flange 201, a second cylinder 202, a partition 203, a first flange 205, a pressure plate 206, a crankshaft 207, a second roller 208, a spring 209, a second slide 210, a pin 215, and a pin spring 216, wherein the first cylinder 204 and the second cylinder 202 are separated by the partition 203, the second flange 201 is disposed outside the second cylinder 202, the first flange 205 is disposed outside the first cylinder 204, and the pressure plate 206 is pressed on the first cylinder 204. A sliding hole is axially formed in the first flange 205, a pin 215 is disposed in the sliding hole, a pin spring 216 is disposed at the bottom of the pin 215, the sliding hole at the bottom of the pin is communicated with a low-pressure chamber of the compressor, and a pin hole is disposed at the bottom of the first sliding piece 214 and is used for being matched with the pin 215 to achieve unloading or working of the first sliding piece 214.

In the present embodiment, the variable cylinder is a first cylinder 204, i.e. a lower cylinder, and the second cylinder 202 is an upper cylinder and is also a working cylinder. In other embodiments, the lower cylinder may be used as the working cylinder, and the upper cylinder may be used as the variable displacement cylinder.

In another embodiment, the buffer comprises a resilient pad 8, the resilient pad 8 being embedded in the tail groove 218. In the present embodiment, compared to the above-mentioned embodiments, the sealing cover is eliminated, and the spring is replaced by the elastic pad 8, so that the installation of the elastic pad 8 can be realized without machining the installation hole 220 and installing the sealing cover, and the number of parts and processes are reduced.

When the elastic pad 8 is mounted, the elastic pad 8 may be inserted from one end along the axial direction of the tail groove 218, so that the elastic pad 8 enters the tail groove 218, and the buffering effect on the first sliding piece 214 is achieved.

In order to prevent the elastic pad 8 from being displaced by the retraction impact of the first slide 214, it is preferable that the side wall of the tail groove 218 is fitted to the fitting surface shape of the elastic pad 8, so that the contact effect between the elastic pad 8 and the side wall of the tail groove 218 is improved, and the stability of the installation structure of the elastic pad in the tail groove 218 is improved. More preferably, the tail of the tail groove 218 is a rectangular groove, and the elastic pad 8 is also a corresponding rectangular structure, so that half of the structure of the tail groove 218 is semicircular, and the other half of the structure is rectangular, so that the elastic pad 8 can be installed through the rectangular portion, and the elastic pad 8 is limited through the semicircular portion, thereby stably and effectively limiting the elastic pad 8 in the tail groove 218.

Preferably, the contact surface between the elastic pad 8 and the first sliding piece 214 is a plane, so that the balance of the distribution of the acting force of the first sliding piece 214 and the elastic pad 8 in the contact process can be effectively improved, the occurrence of stress deflection is avoided, the contact surface is increased, and the elastic buffering effect of the elastic pad 8 on the first sliding piece 214 is further improved. The contact surface between the two is a plane, so that the contact effect between the two can be improved, the stress stability is improved, and the deviation is avoided.

When the elastic pad 8 is used as a buffer member, when the first sliding piece 214 normally operates, the end surface of the elastic pad 8 close to the inner circle of the first cylinder 204 is not contacted with the first sliding piece 214 all the time, and when the first sliding piece 214 completely enters the first sliding piece groove 217 and is separated from the first roller 211, the elastic pad 8 is contacted with the first sliding piece 214, so that the pressure at the tail part of the first sliding piece 214 is increased, the retraction speed of the first sliding piece 214 is reduced, and the first sliding piece 214 is prevented from impacting the tail groove 218 of the first cylinder 204.

According to an embodiment of the application, the compressor comprises the pump body assembly.

In the present embodiment, the compressor includes an upper cover 1, a pump body assembly 2, a liquid distributor 3, a housing 4, a lower cover 5, a rotor 6, and a stator 7. Wherein the upper cover 1, the housing 4 and the lower cover 5 form a closed space for receiving and fixing the pump body assembly 2 and the stator 7 and storing the refrigerant gas compressed and discharged by the pump body assembly 2, and thus a high back pressure is formed in the compressor housing. The rotor 6 is connected to the pump block assembly 2 and provides a driving force together with the stator 7. The liquid separator 3 is communicated with two air cylinder air suction ports of the pump body component 2 and provides refrigerant gas for the pump body component 2 and the compressor.

According to an embodiment of the application, a heat pump system comprises the compressor described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

1. A pump body assembly is characterized by comprising at least two air cylinders, wherein one air cylinder is a variable-volume cylinder, the variable-volume cylinder comprises a first air cylinder (204), the first air cylinder (204) is provided with a first working chamber, a first sliding vane groove (217) communicated with the first working chamber is arranged on the first air cylinder (204), a first sliding vane (214) is arranged in the first sliding vane groove (217) in a sliding manner, one side, facing the first working chamber, of the first sliding vane (214) is a head part, one side, away from the first working chamber, of the first sliding vane (214) is a tail part, the first sliding vane groove (217) comprises a tail groove (218) matched with the tail part of the first sliding vane (214), the tail groove (218) is sealed and can selectively introduce first pressure gas or second pressure gas so as to realize the switching of the working state or the unloading state of the first sliding vane (214), a buffer is arranged in the tail groove (218) and is arranged on the sliding path of the first sliding sheet (214); when the first sliding piece (214) is in a working state, the interaction force between the first sliding piece (214) and the buffer piece is zero, and when the first sliding piece (214) completely slides into the first sliding piece groove (217), the first sliding piece (214) and the buffer piece start to contact; the buffer piece comprises an elastic sealing element, the first cylinder (204) is radially provided with a mounting hole (220) communicated with the tail groove (218), the elastic sealing element comprises a sealing part (212) and an elastic part (213), the sealing part (212) is arranged in the mounting hole (220) and seals the mounting hole (220), and the elastic part (213) is positioned in the tail groove (218) and extends towards the first sliding piece (214); the sealing part (212) is a sealing cover, the elastic part (213) is a spring, and the spring is arranged on the sealing cover; the relation between the diameter d of the spring and the axial height H of the first sliding piece (214) meets the condition that d is more than or equal to H/2.

2. The pump body assembly according to claim 1, wherein the mounting hole (220) has a counterbore (219), the seal portion (212) being located within the counterbore (219).

3. The pump body assembly according to claim 1, characterized in that the tail groove (218) is provided with a stop step (221), one end of the spring elastically abutting on the sealing cover and the other end elastically abutting on the stop step (221); or one end of the spring is fixedly connected to the sealing cover, and the other end of the spring is elastically connected to the stopping step (221).

4. The pump body assembly of claim 1 or 3, wherein the diameter of the spring is greater than the total length of the seal cap and the spring.

5. The pump block assembly according to claim 1, wherein a relationship between a height L1 of a central axis of the spring from a lower end face of the first cylinder (204) and an axial height H of the first vane (214) satisfies L1 ═ H/2.

6. The pump body assembly according to claim 1, characterized in that said buffer comprises an elastic pad (8), said elastic pad (8) being embedded in said tail groove (218).

7. The pump body assembly according to claim 6, characterized in that the side walls of the tail groove (218) are adapted to the shape of the engagement surface of the elastic pad (8); and/or the contact surface between the elastic pad (8) and the first sliding sheet (214) is a plane.

8. A compressor, characterized by comprising a pump body assembly according to any one of claims 1 to 7.

9. A heat pump system comprising the compressor of claim 8.