阅读说明：本技术 具有轴向平衡功能的电动涡旋压缩机 (Electric scroll compressor with axial balancing function ) 是由 张守信 李建武 贾鹏 苏林 李康 方奕栋 余军 于 2019-04-16 设计创作，主要内容包括：本发明公开了一种具有轴向平衡功能的电动涡旋压缩机,包括：一动涡旋盘以及一静涡旋盘,动涡旋盘与静涡旋盘配合；背压腔,形成于动涡旋盘上；背压通道；封头以及堵头,封头以及堵头均具有贯通的内部通道,封头的外表面密封连接于背压通道朝向排气腔的一侧,堵头的外表面密封连接于背压通道朝向背压腔的一侧；弹力件以及调节球,弹力件一端连接于堵头,另一端连接于调节球,调节球被设置于在封头的内部通道内移动。本发明保证了动涡旋盘工作的稳定性,实现背压的调节,既考虑了工况的适应性,同时实现的成本较低,避免了动涡旋盘上开设背压孔的复杂设计计算过程以及加工过程,保证稳定性的同时有较高的能效,延长了压缩机的使用寿命。(The invention discloses an electric scroll compressor with axial balancing function, comprising: the movable vortex plate is matched with the fixed vortex plate; the back pressure cavity is formed on the movable scroll plate; a back pressure channel; the sealing head and the plug are respectively provided with a through internal channel, the outer surface of the sealing head is connected to one side of the back pressure channel facing the exhaust cavity in a sealing manner, and the outer surface of the plug is connected to one side of the back pressure channel facing the back pressure cavity in a sealing manner; the elastic part and adjust the ball, elastic part one end is connected in the end cap, and the other end is connected in adjusting the ball, and the ball is set up and is removed in the inner channel of head. The invention ensures the working stability of the movable scroll plate, realizes the adjustment of the back pressure, not only considers the adaptability of the working condition, but also has lower cost, avoids the complex design calculation process and the processing process of forming the back pressure hole on the movable scroll plate, ensures the stability, has higher energy efficiency and prolongs the service life of the compressor.)

1. An electrically driven scroll compressor with axial balancing, comprising:

the movable vortex plate and the fixed vortex plate are matched;

a back pressure chamber formed on the movable scroll;

one end of the back pressure channel is communicated with the back pressure cavity, and the other end of the back pressure channel is communicated with the exhaust cavity;

the sealing head and the plug are respectively provided with a through internal channel, wherein the outer surface of the sealing head is connected to one side of the back pressure channel facing the exhaust cavity in a sealing manner, and the outer surface of the plug is connected to one side of the back pressure channel facing the back pressure cavity in a sealing manner;

the elastic part one end connect in the end cap, the other end connect in the adjusting ball, the adjusting ball set up in the inside passage of head removes.

2. The electric scroll compressor with axial balancing function as claimed in claim 1, wherein the electric scroll compressor with axial balancing function includes a support body, and the orbiting scroll is disposed between the fixed scroll and the support body.

3. The electric scroll compressor with axial balancing of claim 2, wherein the back pressure passage comprises:

the first channel is formed on the support body and communicated with the back pressure cavity;

a second passage formed on the fixed scroll and communicating the first passage and the discharge chamber.

4. The electric scroll compressor with an axial balancing function of claim 3, wherein the second passage is provided on a sidewall of the fixed scroll.

5. The electric scroll compressor with axial balancing of claim 3, wherein the head is connected to a side of the second passage facing the discharge chamber, and the choke plug is connected to a side of the second passage facing the first passage.

6. The electric scroll compressor with axial balancing of claim 1, wherein the back pressure chamber is a continuous through annular structure formed uniformly on the orbiting scroll.

7. The electric scroll compressor with an axial balancing function as claimed in claim 1, wherein the number of the back pressure passages is one or more, the number of the back pressure chambers is one or more, and each of the back pressure passages is communicated with each of the back pressure chambers separately or simultaneously.

8. The electric scroll compressor with axial balancing of claim 1, wherein the adjustment balls are steel balls.

9. The electric scroll compressor with axial balancing function of claim 1, wherein the resilient member is a spring.

10. The electric scroll compressor with axial balancing function of any one of claims 1 to 9, wherein the inner passage of the head has a diameter greater than that of the inner passage of the stopper.

Technical Field

The present invention relates to an electric scroll compressor having an axial balancing function.

Background

The scroll compressor has the characteristics of high efficiency, small vibration, high reliability, long service life and the like, and along with the improvement of the precision of processing equipment and the progress of an assembly process, the scroll compressor is also more and more widely applied to the field of heat pump air conditioners of new energy automobiles. At present, the leakage and sealing problems are the major problems restricting the efficiency of the scroll compressor, the operation of the movable scroll is affected by the gas force applied to the scroll in the process of compressing fluid, especially for the working condition of the heat pump in winter of a new energy automobile, the gas pressure of a compressor cavity is very high, the balance of the gas force becomes the most main influencing factor of the efficiency of the compressor, and the balance design problem is of great importance. Research shows that the movable scroll plate floats along the axial direction due to the large axial force of compressed gas, the leakage problem is aggravated due to the expansion of an axial gap, the friction power consumption is increased, the energy efficiency of the compressor is greatly reduced, and the design of axial gas force balance is important content of the scroll compressor. Some prior arts propose to provide a back pressure hole on the movable scroll, but the provision in the compression chamber may cause a reduction in stability of the compression process, cause air pulsation, and affect the adaptability of the axial balance design.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, a movable scroll floats in the axial direction and bears larger axial gas force, separation of the scrolls is easy to generate, leakage is increased, and the energy efficiency of a compressor is reduced, and provides an electric scroll compressor with an axial balance function.

The invention solves the technical problems through the following technical scheme:

an electrically driven scroll compressor with axial balancing, comprising:

the movable vortex plate and the fixed vortex plate are matched;

a back pressure chamber formed on the movable scroll;

one end of the back pressure channel is communicated with the back pressure cavity, and the other end of the back pressure channel is communicated with the exhaust cavity;

the sealing head and the plug are respectively provided with a through internal channel, wherein the outer surface of the sealing head is connected to one side of the back pressure channel facing the exhaust cavity in a sealing manner, and the outer surface of the plug is connected to one side of the back pressure channel facing the back pressure cavity in a sealing manner;

the elastic part one end connect in the end cap, the other end connect in the adjusting ball, the adjusting ball set up in the inside passage of head removes.

The sealing performance of the outer side can be guaranteed through the matching of the seal head, the plug and the backpressure channel. Meanwhile, the internal channel of the end socket and the internal channel of the plug respectively introduce exhaust pressure and back pressure.

In the adjusting process, one side of the adjusting ball bears the exhaust pressure of the exhaust cavity, the other side of the adjusting ball bears the back pressure of the back pressure cavity and the elasticity of the elastic piece, the movement of the adjusting ball is the deformation quantity of the elastic piece, when the compressor corresponds to different working conditions, the pressure of the exhaust cavity is different, the deformation quantity of the elastic piece is also different, and the adjustment of the back pressure is realized. The pressure at the two ends of the regulating ball plays a role of regulation in the balancing process, and therefore the back pressure is regulated by the exhaust pressure and the spring. The scheme does not change the compression cavity structure of the static vortex disk, and is different from the mode of forming the backpressure hole on the movable vortex disk.

The introduction of back pressure in the scheme can balance the axial gas force of the movable scroll. Considering the adaptability of working conditions and the simplicity of design, the back pressure of the back pressure cavity is adjusted by the exhaust pressure and the elastic part, and the dynamic and static vortex disk structure is combined, so that the compensation of axial gas force can be ensured, a good sealing effect is achieved, the leakage problem of the scroll compressor is improved, the stability of the scroll compressor is improved, and the energy efficiency is also ensured.

Preferably, the electric scroll compressor with axial balancing function includes a support body, and the movable scroll is disposed between the fixed scroll and the support body.

Preferably, the back pressure passage comprises:

the first channel is formed on the support body and communicated with the back pressure cavity;

a second passage formed on the fixed scroll and communicating the first passage and the discharge chamber.

Preferably, the second passage is provided on a side wall of the fixed scroll. The second channel is arranged on the side wall of the fixed scroll plate, so that other structures of the fixed scroll plate can be avoided, and the processing difficulty is reduced.

Preferably, the seal head is connected to one side of the second channel, which faces the exhaust cavity, and the plug is connected to one side of the second channel, which faces the first channel. Furthermore, a filter screen can be arranged in the inner channel of the end socket or the inner channel of the plug, so that dust in the gas can be filtered.

Preferably, the back pressure chamber is a continuous through annular structure uniformly formed on the orbiting scroll. Through the annular structure that link up, can make the even distribution in backpressure chamber of backpressure to evenly exert the backpressure on moving the vortex dish. Meanwhile, the movable scroll can be communicated with the backpressure channel all the time when rotating, and stable backpressure generation is guaranteed.

Preferably, the number of the back pressure channels is one or more, the number of the back pressure cavities is one or more, and each back pressure channel is communicated with each back pressure cavity respectively or simultaneously.

Preferably, the adjusting ball is a steel ball.

Preferably, the elastic member is a spring.

Preferably, the diameter of the inner channel of the end socket is larger than that of the inner channel of the plug. Thereby ensuring that more exhaust gas can enter the back pressure channel to balance the back pressure and the elastic force.

The positive progress effects of the invention are as follows: the invention ensures the working stability of the movable scroll plate, realizes the adjustment of the opening and closing degree and the back pressure of the back pressure channel by the elastic piece, not only considers the adaptability of the working condition for the axial balance design, but also has lower cost, avoids the complex design calculation process and the processing process of forming the back pressure hole on the movable scroll plate, ensures the stability of the scroll compressor, has higher energy efficiency and prolongs the service life of the compressor to a certain extent.

Drawings

Fig. 1 is a schematic view of an overall structure of an electric scroll compressor having an axial balancing function according to a preferred embodiment of the present invention.

FIG. 2 is a schematic structural view of an adjustment mechanism of an electric scroll compressor with axial balancing capability in accordance with a preferred embodiment of the present invention.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

For the convenience of observation, the scroll compressor in fig. 1 of the present embodiment has an axial direction parallel to the vertical direction, and the actual scroll compressor has an axial direction mostly parallel to the horizontal direction, but this does not affect the description of the internal structure of the scroll compressor in the present embodiment.

As shown in fig. 1 and 2, the present embodiment discloses an electric scroll compressor with an axial balancing function, wherein the electric scroll compressor with an axial balancing function includes a movable scroll 7, a fixed scroll 6, a back pressure chamber a, back pressure channels (a first channel 51 and a second channel 52), a head 1, a plug 2, an elastic member 3, and an adjusting ball 4.

As shown in fig. 1, the present embodiment includes an orbiting scroll 7 and a fixed scroll 6, the orbiting scroll 7 is engaged with the fixed scroll 6, and the orbiting scroll 7 relatively rotates. The working principle of the orbiting scroll 7 and the fixed scroll 6 is conventional and will not be described herein.

As shown in fig. 1, the present embodiment includes a back pressure chamber a formed on the orbiting scroll 7. The back pressure chamber is a space formed on the orbiting scroll, facing the support body 8 side in the present embodiment, for communicating with the back pressure passage.

As shown in fig. 1, the present embodiment also discloses back pressure passages (a first passage 51 and a second passage 52) having one end communicating with the back pressure chamber a and the other end communicating with the exhaust chamber B. The back pressure channel can be of any communication structure, and the back pressure can be adjusted as long as the two ends of the back pressure channel can be communicated with the back pressure cavity A and the exhaust cavity B respectively.

As shown in fig. 1, the electric scroll compressor with axial balancing function of this embodiment includes a sealing head 1 and a plug 2, both the sealing head 1 and the plug 2 have a through internal channel, wherein, the outer surface of the sealing head 1 is hermetically connected to one side of the back pressure channel facing the exhaust cavity B, and the outer surface of the plug 2 is hermetically connected to one side of the back pressure channel facing the back pressure cavity a.

As shown in fig. 1 and 2, a resilient member 3 and a regulating ball 4 are provided in the back pressure passage. One end of the elastic element 3 is connected with the plug 2, the other end is connected with the adjusting ball 4, and the adjusting ball 4 is arranged in the inner channel 11 of the seal head 1 to move.

The sealing performance of the outer side can be guaranteed by the matching of the seal head 1 and the plug 2 with the backpressure channel. Meanwhile, the internal channel 11 of the end socket 1 and the internal channel 21 of the plug 2 respectively introduce the exhaust pressure of the exhaust cavity B and the back pressure of the back pressure cavity A.

In the adjusting process, one side of the adjusting ball 4 bears the exhaust pressure of the exhaust cavity B, the other side of the adjusting ball bears the back pressure of the back pressure cavity A and the elasticity of the elastic piece 3, the movement of the adjusting ball 4 is the deformation quantity of the elastic piece 3, when the compressor corresponds to different working conditions, the pressure of the exhaust cavity B is different, the deformation quantity of the elastic piece 3 is also different, and the adjustment of the back pressure is realized. The pressure across the regulating ball 4 is regulated during the balancing process, whereby the back pressure is regulated by the exhaust pressure and the spring. The scheme does not change the structure of the compression cavity of the fixed scroll 6 and is different from the mode of forming the backpressure hole on the movable scroll 7.

The introduction of back pressure in this arrangement allows the axial gas forces of orbiting scroll 7 to be balanced. Considering the adaptability of the working condition and the simplicity of design, the back pressure of the back pressure cavity A is adjusted by the exhaust pressure and the elastic part 3, and the dynamic and static vortex disk 6 structure is combined, so that the compensation of axial gas force can be ensured, a good sealing effect is achieved, the leakage problem of the scroll compressor is improved, the stability of the scroll compressor is improved, and the energy efficiency is also ensured.

As shown in fig. 1, the electric scroll compressor having an axial balancing function includes a support body 8, and a movable scroll 7 is provided between a fixed scroll 6 and the support body 8. The support body 8 of the present embodiment not only serves a conventional connection function, but also provides communication with the back pressure chamber a.

As shown in fig. 1, the back pressure passage of the present embodiment may further include a first passage 51 and a second passage 52 according to different regions.

Wherein, the back pressure channel comprises a curved first channel 51, the first channel 51 is formed on the supporting body 8, and the first channel 51 is communicated with the back pressure cavity a.

The back pressure passage further includes a straight second passage 52, the second passage 52 is formed on the fixed scroll 6, and the second passage 52 communicates the first passage 51 and the discharge chamber B.

As shown in fig. 1, in the present embodiment, the second passage 52 is provided on the side wall of the fixed scroll 6. The second passage 52 is provided on the side wall of the fixed scroll 6, and can avoid other structures of the fixed scroll 6, thereby reducing the processing difficulty.

As shown in fig. 1, the sealing head 1 of the present embodiment is connected to a side of the second channel 52 facing the exhaust chamber B, and the plug 2 is connected to a side of the second channel 52 facing the first channel 51. Further, a filter screen may be disposed in the inner channel 11 of the sealing head 1 or the inner channel 21 of the plug 2, so as to filter dust in the gas.

In this embodiment, the back pressure chamber a is a continuous annular structure formed uniformly on the movable scroll 7. Through the through ring structure, the backpressure can be uniformly distributed in the backpressure cavity A, so that the backpressure is uniformly applied to the movable scroll 7. Meanwhile, the movable scroll 7 can be communicated with the backpressure channel all the time when rotating, and stable backpressure generation is guaranteed.

In a specific implementation, the number of the back pressure channels in this embodiment is one or more, the number of the back pressure cavities a is one or more, and each back pressure channel is respectively or simultaneously communicated with each back pressure cavity a.

The adjusting ball 4 of the present embodiment is preferably a steel ball. The resilient member 3 is preferably a spring.

As shown in fig. 2, the diameter of the inner channel 11 of the closure 1 of the present embodiment is larger than the diameter of the inner channel 21 of the stopper 2. Thereby ensuring that more exhaust gas can enter the back pressure channel to balance the back pressure and the elastic force.

The invention ensures the working stability of the movable scroll plate, realizes the adjustment of the opening and closing degree and the back pressure of the back pressure channel by the elastic piece, not only considers the adaptability of the working condition for the axial balance design, but also has lower cost, avoids the complex design calculation process and the processing process of forming the back pressure hole on the movable scroll plate, ensures the stability of the scroll compressor, has higher energy efficiency and prolongs the service life of the compressor to a certain extent.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.