CN113357145A - Compressor exhaust structure and scroll compressor - Google Patents

Abstract

The application provides a compressor exhaust structure and a scroll compressor. The compressor exhaust structure comprises a movable disc (1), a static disc (2) and a crankshaft (3), wherein a first exhaust channel (5) communicated with a compression cavity (8) is arranged on the static disc (2), a second exhaust channel (6) communicated with the compression cavity (8) is arranged on the movable disc (1), a third exhaust channel (7) is arranged on the crankshaft (3), an inlet of the third exhaust channel (7) is communicated with the second exhaust channel (6), and an outlet of the third exhaust channel (7) is communicated to a shell inner cavity (9) of the compressor. According to the compressor exhaust structure, the exhaust area of the compressor can be increased, the exhaust performance of the compressor is improved, and the problem of abrasion of the exhaust tooth head of the compressor is effectively solved.

Description

Compressor exhaust structure and scroll compressor

Technical Field

The application relates to the technical field of compressors, in particular to a compressor exhaust structure and a scroll compressor.

Background

For a scroll compressor, a pump body composed of a movable scroll and a fixed scroll often greatly affects the overall performance of the compressor, including energy efficiency, reliability, noise and the like. Among other things, the design of the wrap profile imposes limitations on the compressor. For example, increasing the discharge angle increases the compression ratio, but decreases the discharge port area.

The area of the exhaust port is an important design index for the scroll compressor, and at present, the scroll compressor is mainly developed towards the direction of increasing the displacement. At the same time as the displacement is increased, the shell diameter of the scroll compressor is not desired to be increased, and the mode of increasing the tooth height has to be used for achieving the same displacement. This method of increasing the tooth height does not increase the area of the exhaust port. This means that as the displacement becomes larger, the same area of the discharge port has to discharge more refrigerant. This will certainly increase the power loss of the gas during the exhaust, and similarly, will also increase the reaction force of the gas to the scroll tooth head when the exhaust is pressed out of the exhaust port, make the tooth head more easily produce deformation and wear, the reliability reduces.

Disclosure of Invention

Therefore, the technical problem to be solved by the application is to provide a compressor exhaust structure and a scroll compressor, which can increase the exhaust area of the compressor, improve the exhaust performance of the compressor and effectively improve the problem of abrasion of the exhaust tooth head of the compressor.

In order to solve the problem, the application provides a compressor exhaust structure, including driving disk, quiet dish and bent axle, be provided with the first exhaust passage with the compression chamber intercommunication on the quiet dish, be provided with the second exhaust passage with the compression chamber intercommunication on the driving disk, be provided with the third exhaust passage on the bent axle, the import and the second exhaust passage intercommunication of third exhaust passage, the export intercommunication of third exhaust passage to the casing inner chamber of compressor.

Preferably, the movable disk bottom has movable disk bearing, and the bent axle end has the eccentric part, and movable disk bearing and eccentric part normal running fit are provided with annular seal structure between movable disk bottom and the eccentric part, and annular seal structure falls into inboard space and outside space with the space between movable disk bottom and the eccentric part, and second exhaust passage and third exhaust passage all communicate with inboard space.

Preferably, the third exhaust passage comprises an axial section and a radial section, the axial section is communicated with the second exhaust passage, and the radial section is arranged at the exhaust tail end of the axial section and is communicated with the inner cavity of the shell.

Preferably, the crankshaft is provided with a driving motor, and the radial section is positioned on one side of the driving motor, which is far away from the movable disc; or the crankshaft is provided with a driving motor, and the radial section is positioned on one side of the driving motor close to the movable disc.

Preferably, the movable plate bottom has a movable plate bearing, the inlet of the third exhaust passage is located on the side where the rotational axis of the crankshaft is directed toward the central axis of the movable plate bearing, and the radial section is provided on the side where the rotational axis of the crankshaft is directed toward the central axis of the movable plate bearing.

Preferably, the distance between the center of the outlet of the second exhaust passage and the rotational axis of the crankshaft is equal to the eccentricity of the movable and stationary disks.

Preferably, the second exhaust passage comprises an exhaust groove and an auxiliary exhaust port, the exhaust groove is communicated with the compression cavity, the auxiliary exhaust port is arranged at the bottom of the exhaust groove, and the auxiliary exhaust port is communicated with the third exhaust passage.

Preferably, when the movable disc rotates to the exhaust angle, the exhaust groove is located in a central cavity area defined by the molded lines of the movable disc and the fixed disc, and the auxiliary exhaust port is located in the range of the exhaust groove.

Preferably, the second exhaust passage includes an auxiliary exhaust port penetrating the movable platen in the axial direction of the crankshaft, one end of the auxiliary exhaust port communicating with the compression chamber, and the other end communicating with the third exhaust passage.

Preferably, the compressor discharge structure further includes an oil supply passage axially penetrating the crankshaft, the oil supply passage communicating with the outer space.

Preferably, one side of the eccentric portion has a cut edge, the compressor discharge structure further includes an oil supply passage, an inlet of the oil supply passage is provided on the cut edge, and an outlet of the oil supply passage is located at the bottom of the crankshaft.

According to another aspect of the present application, there is provided a scroll compressor including a compressor discharge structure, the compressor discharge structure being the above-mentioned compressor discharge structure.

The application provides a compressor exhaust structure, including driving disk, quiet dish and bent axle, be provided with the first exhaust passage with the compression chamber intercommunication on the quiet dish, be provided with the second exhaust passage with the compression chamber intercommunication on the driving disk, be provided with the third exhaust passage on the bent axle, the import and the second exhaust passage intercommunication of third exhaust passage, the export of third exhaust passage communicates to the casing inner chamber of compressor. This compressor exhaust structure has increased the second exhaust passage on the driving disk, third exhaust passage has been increased on the bent axle, make the exhaust in the compressor compression chamber not only can discharge via the first exhaust passage on the quiet dish, can also discharge via the second exhaust passage on the driving disk, consequently, when the compressor carries out big discharge capacity, can increase exhaust area through the second exhaust passage on the driving disk, reduce the exhaust consumption of the big discharge capacity during operation of compressor, reduce gaseous reaction force to the vortex tooth head, effectively improve the problem that the compressor exhaust tooth head warp wearing and tearing, improve the exhaust performance of compressor, improve the reliability of compressor operation.

Drawings

FIG. 1 is an enlarged view of a portion of a compressor discharge structure according to an embodiment of the present application;

FIG. 2 is a schematic view of a compressor discharge configuration according to an embodiment of the present application;

FIG. 3 is a schematic view of a compressor discharge configuration according to an embodiment of the present application;

FIG. 4 is a schematic view of the discharge passage location of the compressor discharge structure in accordance with an embodiment of the present application;

FIG. 5 is a perspective view of a movable plate of the compressor discharge structure according to one embodiment of the present application;

FIG. 6 is a schematic view of a compressor discharge configuration according to an embodiment of the present application;

fig. 7 is a partially enlarged structural view of a discharge structure of a compressor according to an embodiment of the present application.

The reference numerals are represented as:

1. a movable plate; 2. a stationary disc; 3. a crankshaft; 4. a movable disc bearing; 5. a first exhaust passage; 6. a second exhaust passage; 7. a third exhaust passage; 8. a compression chamber; 9. an inner cavity of the shell; 10. an eccentric portion; 11. an annular seal structure; 12. an inner space; 13. an outer space; 14. an axial section; 15. a radial segment; 16. a drive motor; 17. an exhaust groove; 18. a secondary exhaust port; 19. an oil supply passage; 20. and (6) trimming.

Detailed Description

With reference to fig. 1 to 7, according to an embodiment of the present application, the compressor discharge structure includes a moving disk 1, a stationary disk 2, and a crankshaft 3, a first discharge channel 5 communicated with a compression cavity 8 is disposed on the stationary disk 2, a second discharge channel 6 communicated with the compression cavity 8 is disposed on the moving disk 1, a third discharge channel 7 is disposed on the crankshaft 3, an inlet of the third discharge channel 7 is communicated with the second discharge channel 6, and an outlet of the third discharge channel 7 is communicated to a housing inner cavity 9 of the compressor.

This compressor exhaust structure has increased second exhaust passage 6 on driving disk 1, third exhaust passage has been increased on the bent axle, make the exhaust in the compressor compression chamber not only can discharge via the first exhaust passage on quiet dish 2, can also discharge via second exhaust passage 6 on driving disk 1, consequently, when the compressor carries out big discharge capacity, can increase exhaust area through second exhaust passage 6 on driving disk 1, reduce the exhaust consumption of the big discharge capacity during operation of compressor, reduce the reaction force of gas to the vortex tooth head, effectively improve the problem that the compressor exhaust tooth head warp wearing and tearing, improve the exhaust performance of compressor, improve the reliability of compressor operation.

In this embodiment, the compressor further includes a casing, an exhaust pipe is disposed on the casing, a casing inner cavity is formed in the casing, the exhaust pipe is communicated with the casing inner cavity, and exhaust of a compression cavity of the compressor is discharged from the exhaust pipe after entering the casing inner cavity.

The movable disc 1 and the static disc 2 are oppositely matched to form a pump body, molded lines of the movable disc 1 and the static disc 2 are meshed with each other to form a plurality of compression chambers, and the movable disc 1 revolves around the static disc 2.

Still be provided with the upper bracket in the casing, movable disk 1 is through preventing that rotation mechanism installs on the upper bracket, prevents that rotation mechanism can prevent that movable disk 1 from taking place the rotation with 2 cooperation in-process of quiet dish for movable disk 1 can only take place the revolution around quiet dish 2.

In one embodiment, the bottom of the movable disc 1 is provided with a movable disc bearing 4, the end part of the crankshaft 3 is provided with an eccentric part 10, the movable disc bearing 4 is in rotating fit with the eccentric part 10, an annular sealing structure 11 is arranged between the bottom of the movable disc 1 and the eccentric part 10, the annular sealing structure 11 divides the space between the bottom of the movable disc 1 and the eccentric part 10 into an inner space 12 and an outer space 13, and the second exhaust passage 6 and the third exhaust passage 7 are both communicated with the inner space 12.

In this embodiment, the annular sealing structure 11 is located at the outer periphery of the outlet of the second exhaust channel 6, and can divide the space between the bottom of the movable disk 1 and the eccentric portion 10 into an inner space 12 and an outer space 13, so that the inner space 12 is isolated from the outer space 13, thereby effectively preventing oil or gas with non-exhaust pressure in the outer space 13 from entering the inner space 12, ensuring that compressor exhaust gas can smoothly enter the housing inner cavity 9 through the second exhaust channel 6 and the third exhaust channel 7, and realizing simultaneous exhaust of the stationary disk 2 and the movable disk 1.

In the present embodiment, the second exhaust channel 6 and the third exhaust channel 7 are always communicated through the inner space 12, and during the rotation of the compressor, the second exhaust channel 6 is communicated with the gas compressed to the exhaust pressure in the pump body, so that a part of the exhaust gas can enter the third exhaust channel 7 from the second exhaust channel 6 through the inner space 12, and then is discharged from the third exhaust channel 7 into the housing inner cavity 9.

In one embodiment, the annular sealing structure 11 is, for example, an annular sealing ring, and a sealing groove is provided on an end surface of the eccentric portion 10, and the annular sealing ring is installed in the sealing groove. The annular seal structure 11 may be another annular seal structure such as a seal ring.

In one embodiment, the third exhaust passage 7 comprises an axial section 14 and a radial section 15, the axial section 14 being in communication with the second exhaust passage 6, and the radial section 15 being arranged at the exhaust end of the axial section 14 and being in communication with the housing internal cavity 9. In the present embodiment, the third exhaust passage 7 is in an L-shaped structure, and the exhaust gas enters the third exhaust passage 7, moves for a certain distance along the axial direction through the axial section 14, and then leaves the crankshaft 3 in the radial direction through the radial section 15.

In one embodiment, the crankshaft 3 is provided with a drive motor 16, and the radial section 15 is located on the side of the drive motor 16 away from the moving disk 1. In the embodiment, the radial section 15 is located below the driving motor 16, so that the compressed refrigerant can be guided to the lower portion of the driving motor 16 through the third exhaust channel 7, so that the refrigerant can pass through the driving motor 16 in the process of flowing to the exhaust pipe, and further, the driving motor 16 is effectively cooled.

In the related art at present, it is proposed to add an exhaust sheet metal part on the housing to lead a part of the exhaust flowing downward from the upper side of the compressor to the bottom, so as to better cool the motor.

In one embodiment, the crankshaft 3 is provided with a driving motor 16, and the radial section 15 is positioned on one side of the driving motor 16 close to the movable disk 1.

In one embodiment, the bottom of the rotor 1 has a rotor bearing 4, the inlet of the third exhaust duct 7 is located on the side of the rotational axis of the crankshaft 3 directed to the central axis of the rotor bearing 4, and the radial section 15 is located on the side of the rotational axis of the crankshaft 3 directed to the central axis of the rotor bearing 4.

The distance between the center of the outlet of the second exhaust passage 6 and the rotational axis of the crankshaft 3 is equal to the eccentricity of the movable and stationary disks 1 and 2.

In this embodiment, the outlet of the second exhaust channel 6 of the movable disk 1 and the inlet of the third exhaust channel 7 on the crankshaft 3 are axially overlapped, and the distance between the circle center of the two and the connecting line of the axis is equal to the eccentricity, the outlet of the second exhaust channel 6 is opened at the circle center position of the movable disk bearing 4, and the inlet of the third exhaust channel 7 on the crankshaft 3 is opened at the circle center position of the eccentric portion 10 of the crankshaft 3, so that during the rotation of the crankshaft 3, the movable disk 1 does not rotate, but the relative position of the outlet of the second exhaust channel 6 of the movable disk 1 and the inlet of the third exhaust channel 7 on the crankshaft 3 does not change. In this case, the air path on driving disk 1 and bent axle 3 does not take place relative motion, and the air guide is comparatively stable.

In practical use, even if the outlet of the second exhaust passage 6 and the inlet of the third exhaust passage 7 on the crankshaft 3 are not in the center of the eccentric portion 10, the two have relative movement, and as long as the relative movement of the two is limited in the inner space 12, the compressor exhaust mechanism can exhaust air normally.

The exhaust gas in the compression chamber 8 enters the third exhaust passage 7 of the crankshaft 3 and moves first axially downward and then moves to the radial outlet and is discharged out of the crankshaft 3. In the present application, the inlet of the third exhaust channel 7 is located on the side of the central axis of the crankshaft 3 directed towards the moving disc 1, and the outlet of the third exhaust channel 7 is also on this side, which gives the gas a tendency to move in the direction of the centrifugal force acting on it to discharge the gas out of the crankshaft 3, thus promoting the exhaust of the crankshaft 3.

In one embodiment, the second discharge passage 6 includes a discharge groove 17 and a sub discharge port 18, the discharge groove 17 communicating with the compression chamber 8, the sub discharge port 18 being provided at the bottom of the discharge groove 17, the sub discharge port 18 communicating with the third discharge passage 7.

Preferably, when the movable disc 1 rotates to the exhaust angle, the exhaust groove 17 is located in a central cavity area defined by the molded line of the movable disc 1 and the molded line of the fixed disc 2, and the auxiliary exhaust port 18 is located in the range of the exhaust groove 17.

In the present embodiment, the cross-sectional area of the discharge groove 17 is larger than the cross-sectional area of the sub discharge port 18, and the sub discharge port 18 completely falls within the range of the discharge groove 17, so that the communication angle between the sub discharge port 18 and the compression chamber 8 can be increased by using the discharge groove 17, and the stable communication between the sub discharge port 18 and the compression chamber 8 is ensured.

In one embodiment, the compressor discharge structure further includes an oil supply passage 19, the oil supply passage 19 axially penetrates the crankshaft 3, and the oil supply passage 19 communicates with the outer space 13 so as to supply oil to the axial space between the movable disc bearing 4 and the eccentric portion 10.

In one embodiment, the second exhaust passage 6 includes a secondary exhaust port 18, the secondary exhaust port 18 extends through the movable platen 1 in the axial direction of the crankshaft 3, and one end of the secondary exhaust port 18 communicates with the compression chamber 8 and the other end communicates with the third exhaust passage 7. In the present embodiment, the exhaust groove is completely opened as the sub exhaust port 18, in this case, the sub exhaust port moves relative to the eccentric portion 10 of the crankshaft 3, so that the area of the inner space 12 needs to be increased, so that the sub exhaust port 18 does not exceed the area of the inner space 12 when moving relative around the eccentric portion 10 during operation, and meanwhile, the aperture of the third exhaust passage 7 on the crankshaft 3 is correspondingly enlarged and opened at the central portion of the end surface of the eccentric portion 10. The exhaust structure of the embodiment of the application can maximize the exhaust area of the auxiliary exhaust port 18 and improve the exhaust effect.

In one embodiment, one side of the eccentric portion 10 has a cut edge 20, and the compressor discharge structure further includes an oil supply passage 19, an inlet of the oil supply passage 19 is provided on the cut edge 20, and an outlet of the oil supply passage 19 is located at the bottom of the crankshaft 3.

In one embodiment, the secondary exhaust port 18 is a circular hole and the cross-section of the inner space 12 is circular. In the present embodiment, after the aperture of the sub-exhaust port 18 is increased, the exhaust area is increased, the aperture of the inner space 12 needs to be increased accordingly, and the outer diameter of the annular sealing structure 11 is also increased, so that the installation space of the oil supply passage 19 is affected, therefore, in order to ensure the smooth installation of the oil supply passage 19, the inlet of the oil supply passage 19 is disposed on the cut edge 20, the passage formed by the cut edge 20 and the movable disc bearing 4 is communicated with the outer space 13, so that the oil supply passage 19 can be communicated with the outer space 13 through the passage, and since the port of the oil supply passage 19 is not disposed on the end surface of the eccentric portion 10, the port does not collide with the installation position of the annular sealing structure 11, thereby ensuring the smooth installation of the oil supply passage 19.

In this embodiment, during operation of the compressor, suction gas is compressed by the pump body, and one way is discharged from the compressor upward from the first discharge passage 5 of the stationary disk 2, guided by the housing, and downward through the pump body into the high-pressure chamber. And the other path of exhaust channel 6 at the bottom of the exhaust driven disc 1 enters the crankshaft 3 and is thrown into a high-pressure cavity connected with an exhaust pipe along the horizontal direction along with the rotation of the crankshaft 3. Because the refrigerant flowing from the crankshaft 3 does not need to bounce for many times through the shell and is directly discharged into the high-pressure cavity, the high-pressure cavity has smaller exhaust resistance, and the exhaust is more facilitated.

According to an embodiment of the application, the scroll compressor comprises a compressor discharge structure, and the compressor discharge structure is the compressor discharge structure.

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 (12)

1. The utility model provides a compressor exhaust structure, its characterized in that, includes driving disk (1), quiet dish (2) and bent axle (3), be provided with on quiet dish (2) with first exhaust passage (5) of compression chamber (8) intercommunication, be provided with on driving disk (1) with second exhaust passage (6) of compression chamber (8) intercommunication, be provided with third exhaust passage (7) on bent axle (3), the import of third exhaust passage (7) with second exhaust passage (6) intercommunication, the export of third exhaust passage (7) communicates to the casing inner chamber (9) of compressor.

2. A compressor discharge structure according to claim 1, wherein the movable disc (1) has a movable disc bearing (4) at the bottom, the crankshaft (3) has an eccentric portion (10) at the end, the movable disc bearing (4) is rotatably fitted to the eccentric portion (10), an annular seal structure (11) is provided between the movable disc (1) bottom and the eccentric portion (10), the annular seal structure (11) divides a space between the movable disc (1) bottom and the eccentric portion (10) into an inner space (12) and an outer space (13), and the second discharge passage (6) and the third discharge passage (7) are both communicated with the inner space (12).

3. Compressor discharge structure according to claim 1, characterized in that said third discharge channel (7) comprises an axial section (14) and a radial section (15), said axial section (14) communicating with said second discharge channel (6), said radial section (15) being arranged at the discharge end of said axial section (14) and communicating with said housing inner cavity (9).

4. A compressor discharge structure according to claim 3, wherein a drive motor (16) is provided on the crankshaft (3), and the radial section (15) is located on a side of the drive motor (16) remote from the movable plate (1); or a driving motor (16) is arranged on the crankshaft (3), and the radial section (15) is positioned on one side, close to the movable disc (1), of the driving motor (16).

5. A compressor discharge structure according to claim 3, wherein the movable disc (1) has a movable disc bearing (4) at the bottom, the inlet of the third discharge passage (7) is located at a side where the rotational axis of the crankshaft (3) is directed to the central axis of the movable disc bearing (4), and the radial section (15) is provided at a side where the rotational axis of the crankshaft (3) is directed to the central axis of the movable disc bearing (4).

6. Compressor discharge structure according to claim 1, characterized in that the distance between the outlet centre of said second discharge channel (6) and the axis of rotation of said crankshaft (3) is equal to the eccentricity of said movable (1) and stationary (2) discs.

7. The compressor discharge structure according to claim 1, wherein the second discharge passage (6) includes a discharge groove (17) and a sub discharge port (18), the discharge groove (17) communicating with the compression chamber (8), the sub discharge port (18) being provided at the bottom of the discharge groove (17), the sub discharge port (18) communicating with the third discharge passage (7).

8. The compressor discharge structure according to claim 7, wherein when said movable disc (1) rotates to a discharge angle, said discharge groove (17) is located in a central cavity region surrounded by a profile of said movable disc (1) and a profile of said stationary disc (2), and said auxiliary discharge port (18) is located in a range of said discharge groove (17).

9. A compressor discharge structure according to claim 2, wherein said second discharge passage (6) includes a secondary discharge port (18), said secondary discharge port (18) penetrating through said movable platen (1) in the axial direction of said crankshaft (3), one end of said secondary discharge port (18) communicating with said compression chamber (8) and the other end communicating with said third discharge passage (7).

10. Compressor discharge structure according to claim 2, characterized in that it further comprises an oil supply channel (19), said oil supply channel (19) axially penetrating said crankshaft (3), said oil supply channel (19) communicating with said outer space (13).

11. The compressor discharge structure according to claim 9, wherein one side of the eccentric portion (10) has a cut edge (20), the compressor discharge structure further comprising an oil supply passage (19), an inlet of the oil supply passage (19) being provided on the cut edge (20), and an outlet of the oil supply passage (19) being located at a bottom of the crankshaft (3).

12. A scroll compressor including a compressor discharge arrangement, wherein the compressor discharge arrangement is as claimed in any one of claims 1 to 11.

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