A scroll compressor with axially flexible pressure balancing mechanism

Abstract

The utility model discloses a scroll compressor with an axially flexible pressure balancing mechanism, comprising: a compression part, the compression part comprising a static scroll and a movable scroll, the static scroll and the movable scroll form a compression chamber; a main bearing seat; a floating sealing plate; wherein a static scroll back pressure chamber is formed between the floating sealing plate and the static scroll, a movable scroll back pressure chamber is formed between the main bearing seat and the movable scroll, and the static scroll is provided with a back pressure hole for connecting the compression chamber with the static scroll back pressure chamber, and the movable scroll is provided with a back pressure channel for connecting the compression chamber with the movable scroll back pressure chamber. The utility model arranges a static scroll back pressure chamber above the compression part, arranges a movable scroll back pressure chamber below the compression part, and arranges a specific channel for connecting the compression chamber, the static scroll back pressure chamber, and the movable scroll back pressure chamber, so that the high-pressure gas in the compression chamber enters the static scroll back pressure chamber and the movable scroll back pressure chamber, reduces the friction between the movable scroll and the thrust surface, and improves the reliability of the compressor.

Description

Technical Field

[0001] The utility model belongs to the technical field of scroll compressors, and in particular relates to a scroll compressor with an axially flexible pressure balancing mechanism. Background Art

[0002] Scroll compressor is a common air compression equipment, which is often used in industrial and manufacturing fields. It compresses gas into high-pressure gas through rotational motion. This type of compressor is usually highly efficient, low-noise and has a small size, so it is widely used in many fields.

[0003] As the scroll displacement increases, the back pressure of the scroll compressor using axial flexibility technology is continuously pushed up, causing the pressure on the thrust surface of the movable scroll and the main bearing to continue to rise, which also leads to frequent wear and failure of large-displacement scroll compressors. For compressors using air-injection and enthalpy-increasing technology, the force on the thrust surface is even worse and the failure rate is higher.

[0004] In the prior art, lubricating oil is usually used to lubricate the thrust surface to reduce the wear of the thrust surface. However, the lubricating oil may be affected by external impurities or debris generated during operation during use, resulting in a decrease in the cleanliness of the thrust surface, increased friction and wear, and it is difficult for the lubricating oil to maintain a stable temperature under high-speed rotation, which may cause the thrust surface temperature to be too high or too low, thereby affecting the normal operation of the equipment. Therefore, it is necessary to develop a mechanism that balances the back pressure of the thrust surface and reduces the wear of the thrust surface. Utility Model Content

[0005] In order to solve the above technical problems, the utility model discloses a scroll compressor with an axially flexible pressure balancing mechanism, in which two cavities are arranged above and below the compression part, and the two cavities are connected to balance the back pressure on the thrust surface, reduce the wear of the thrust surface, and improve the reliability of the compressor.

[0006] Specifically, the utility model discloses a scroll compressor with an axially flexible pressure balancing mechanism, comprising:

[0007] A housing having an air intake port and an air exhaust port;

[0008] A compression part, the compression part includes a fixed scroll and an orbiting scroll meshing with the fixed scroll, the fixed scroll and the orbiting scroll forming a compression chamber;

[0009] A driving part, wherein the driving part provides a driving force for the orbiting scroll;

[0010] A main bearing seat, which is arranged below the compression part and is used to support the compression part;

[0011] A floating sealing disk, wherein the floating sealing disk is arranged above the fixed scroll disk; wherein,

[0012] A static vortex back-pressure chamber is formed between the floating sealing disk and the static vortex disk, a dynamic vortex back-pressure chamber is formed between the main bearing seat and the dynamic vortex disk, and the static vortex disk is provided with a back-pressure hole for connecting the compression chamber with the static vortex back-pressure chamber, and the dynamic vortex disk is provided with a back-pressure channel for connecting the compression chamber with the dynamic vortex back-pressure chamber.

[0013] A static vortex back-pressure chamber is arranged above the compression part, and a movable vortex back-pressure chamber is arranged below the compression part. A specific channel is arranged to connect the compression chamber, the static vortex back-pressure chamber and the movable vortex back-pressure chamber, so that the high-pressure gas in the compression chamber enters the static vortex back-pressure chamber and the movable vortex back-pressure chamber, thereby reducing the pressure between the movable vortex and the thrust surface and improving the reliability of the compressor.

[0014] Furthermore, the main bearing seat has a thrust surface abutting against the movable scroll, the thrust surface is provided with a back pressure groove, both sides of the back pressure groove have sealing parts, and the movable scroll, the sealing part and the back pressure groove form a movable scroll back pressure chamber.

[0015] Furthermore, the transverse cross-section of the back pressure groove is an annular structure.

[0016] Furthermore, the width of the back pressure groove is not less than the rotation diameter of the orbiting scroll.

[0017] Furthermore, the sealing portion includes a first sealing groove and a second sealing groove, wherein the first sealing groove is arranged on the outside of the back pressure groove, and the second sealing groove is arranged on the inside of the back pressure groove; wherein,

[0018] Sealing gaskets are provided in both the first sealing groove and the second sealing groove.

[0019] Furthermore, the sealing gasket includes a sealing spring gasket and a hard sealing ring gasket, and the sealing spring gasket is arranged below the hard sealing ring gasket.

[0020] Furthermore, the back-pressure channel includes a transverse air guiding channel, a first longitudinal air guiding channel and a second longitudinal air guiding channel, the first longitudinal air guiding channel is used to connect the compression chamber with the transverse air guiding channel, and the second longitudinal air guiding channel is used to connect the transverse air guiding channel with the movable scroll back-pressure chamber.

[0021] Furthermore, the position of the second longitudinal air guiding channel matches the position of the back pressure groove.

[0022] Furthermore, the opening of the transverse air guiding channel is sealed by a sealing member.

[0023] The beneficial effects of the utility model are:

[0024] 1. The high-pressure gas in the compression chamber enters the movable scroll back-pressure chamber through the back-pressure channel. The back-pressure chamber provides an upward support force for the movable scroll, reducing the wear of the thrust surface.

[0025] 2. The width of the back pressure groove is adjustable to change the contact force between the main bearing seat and the thrust surface.

[0026] 3. The sealing spring gasket provides upward elastic support for the hard sealing ring gasket, so that the movable scroll plate and the hard sealing ring gasket are elastically abutted, thereby improving the sealing effect of the movable scroll back pressure chamber.

[0027] 4. When the orbiting scroll performs a vortex motion, the second air guide channel always rotates within the range of the back pressure groove, and the high-pressure gas is guided to the orbiting scroll back pressure chamber, balancing the back pressure of the orbiting scroll and improving the stability of the compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments or the description of the prior art will be briefly introduced below.

[0029] Figure 1 is a cross-sectional view of a scroll compressor;

[0030] Figure 2 is a partial view of a scroll compressor;

[0031] Figure 3 This is a partial enlarged view of the scroll compressor;

[0032] Figure 4 is a cross-sectional view of a fixed scroll of a scroll compressor;

[0033] Figure 5 is a cross-sectional view of a movable scroll of a scroll compressor;

[0034] Figure 6 It is an axonometric view of the main bearing seat of the scroll compressor;

[0035] Figure 7 is a top view of the main bearing seat of the scroll compressor;

[0036] Figure 8 It is a cross-sectional view of the main bearing seat of the scroll compressor.

[0037] The numbers involved in the accompanying drawings are as follows: shell 1, compression part 2, static scroll plate 21, back pressure hole 211, movable scroll plate 22, back pressure channel 221, transverse air guide channel 2211, first longitudinal air guide channel 2212, second longitudinal air guide channel 2213, seal 222, static scroll back pressure chamber 23, movable scroll back pressure chamber 24, drive part 3, main bearing seat 4, thrust surface 40, back pressure groove 41, first sealing groove 42, second sealing groove 43, sealing gasket 44, hard sealing ring gasket 441, sealing spring gasket 442, floating sealing plate 5. DETAILED DESCRIPTION

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0039] like Figure 1-8 As shown, the utility model discloses a scroll compressor with an axially flexible pressure balancing mechanism, comprising:

[0040] The housing 1 has an air intake port and an air exhaust port;

[0041] The compression part 2 includes a fixed scroll 21 and a movable scroll 22 meshing with the fixed scroll 21, and the fixed scroll 21 and the movable scroll 22 form a compression chamber;

[0042] A driving part 3, which provides driving force for the movable scroll 22;

[0043] A main bearing seat 4, which is arranged below the compression part 2 and is used to support the compression part 2;

[0044] The floating sealing disk 5 is arranged above the fixed scroll disk 21; wherein,

[0045] A static vortex back-pressure chamber 23 is formed between the floating sealing disk 5 and the static vortex disk 21, a dynamic vortex back-pressure chamber 24 is formed between the main bearing seat 4 and the dynamic vortex disk 22, and the static vortex disk 21 is provided with a back-pressure hole 211 for connecting the compression chamber with the static vortex back-pressure chamber 23, and the dynamic vortex disk 22 is provided with a back-pressure channel 221 for connecting the compression chamber with the dynamic vortex back-pressure chamber 24.

[0046] The utility model arranges a static vortex back-pressure chamber 23 above the compression part 2, and an orbiting vortex back-pressure chamber 24 below the compression part, and arranges a specific channel to connect the compression chamber, the static vortex back-pressure chamber 23, and the orbiting vortex back-pressure chamber 24, so that the high-pressure gas in the compression chamber enters the static vortex back-pressure chamber 23 and the orbiting vortex back-pressure chamber 24, thereby reducing the friction between the orbiting scroll plate 22 and the thrust surface 40, and improving the reliability of the compressor.

[0047] In some embodiments of the utility model, the main bearing seat 4 has a thrust surface 40 abutting against the movable scroll 22, and the thrust surface 40 is provided with a back pressure groove 41, and the two sides of the back pressure groove 41 have sealing parts, and the movable scroll 22, the sealing part, and the back pressure groove 41 form a movable scroll back pressure chamber 24, wherein the transverse cross section of the back pressure groove 41 is an annular structure, and the width of the back pressure groove 41 is not less than the rotation diameter of the movable scroll 22. When the movable scroll 22 performs a vortex motion, the high-pressure gas in the compression chamber enters the movable scroll back pressure chamber 24 through the back pressure channel 221, providing an upward support force for the movable scroll 22 and reducing the wear of the thrust surface 40. On the other hand, the width of the back pressure groove 41 is adjustable, thereby changing the contact force between the main bearing seat 4 and the thrust surface 40.

[0048] In some embodiments of the present invention, the sealing portion includes a first sealing groove 42 and a second sealing groove 43, wherein the first sealing groove 42 is arranged on the outside of the back pressure groove 41, and the second sealing groove 43 is arranged on the inside of the back pressure groove 41; wherein a sealing gasket 44 is arranged in both the first sealing groove 42 and the second sealing groove 43. The sealing groove and the sealing gasket 44 are arranged on both sides of the back pressure groove 41, and the high pressure gas is restricted in the movable scroll back pressure chamber 24, thereby improving the sealing performance of the movable scroll back pressure chamber 24.

[0049] In some embodiments of the present invention, the sealing gasket 44 includes a sealing spring washer 442 and a hard sealing ring washer 441, and the sealing spring washer 442 is arranged below the hard sealing ring washer 441. The sealing spring washer 442 provides upward elastic support for the hard sealing ring washer 441, so that the movable scroll 22 and the hard sealing ring washer 441 are elastically abutted, further improving the sealing effect of the movable scroll back pressure chamber 24.

[0050] In some embodiments of the present invention, the back pressure channel 221 includes a transverse air guide channel 2211, a first longitudinal air guide channel 2212 and a second longitudinal air guide channel 2213. The first longitudinal air guide channel 2212 is used to connect the compression chamber with the transverse air guide channel 2211, and the second longitudinal air guide channel 2213 is used to connect the transverse air guide channel 2211 with the movable scroll back pressure chamber 24. The back pressure channel 221 connects the compression chamber with the movable scroll back pressure chamber 24, and part of the high pressure gas in the compression chamber enters the movable scroll back pressure chamber 24, providing an upward support force for the movable scroll 22.

[0051] In some embodiments of the present invention, the position of the second longitudinal air guide channel 2213 matches the position of the back pressure groove 41. When the orbiting scroll 22 performs a vortex motion, the second longitudinal air guide channel 2213 always rotates within the range of the back pressure groove 41, and conducts the high-pressure gas to the orbiting scroll back pressure chamber 24, balancing the back pressure of the orbiting scroll 22, thereby improving the stability of the compressor operation.

[0052] In some embodiments of the present invention, the opening of the transverse air guiding channel 2211 is sealed by a seal 222. The port of the transverse air guiding channel 2211 is provided with a seal 222, and the seal 222 seals the opening of the transverse air guiding channel to avoid leakage of the refrigerant medium in the compression part 2 and pressure loss.

[0053] For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A scroll compressor with an axially flexible pressure balancing mechanism, characterized in that: include: A housing (1), wherein the housing (1) has an air intake port and an air exhaust port; A compression part (2), the compression part (2) comprising a fixed scroll (21) and a movable scroll (22) meshing with the fixed scroll (21), the fixed scroll (21) and the movable scroll (22) forming a compression chamber; A driving part (3), wherein the driving part (3) provides a driving force for the movable scroll (22); A main bearing seat (4), the main bearing seat (4) being arranged below the compression part (2) and used for supporting the compression part (2); A floating sealing disk (5), wherein the floating sealing disk (5) is arranged above the fixed scroll disk (21); wherein: A static vortex back pressure chamber (23) is formed between the floating sealing disk (5) and the static vortex disk (21), a dynamic vortex back pressure chamber (24) is formed between the main bearing seat (4) and the dynamic vortex disk (22), and the static vortex disk (21) is provided with a back pressure hole (211) for connecting the compression chamber with the static vortex back pressure chamber (23), and the dynamic vortex disk (22) is provided with a back pressure channel (221) for connecting the compression chamber with the dynamic vortex back pressure chamber (24).

2. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 1, characterized in that: The main bearing seat (4) has a thrust surface (40) abutting against the movable scroll (22), the thrust surface (40) is provided with a back pressure groove (41), both sides of the back pressure groove (41) have sealing parts, and the movable scroll (22), the sealing part and the back pressure groove (41) form a movable scroll back pressure chamber (24).

3. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 2, characterized in that: The transverse cross section of the back pressure groove (41) is an annular structure.

4. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 3, characterized in that: The width of the back pressure groove (41) is not less than the rotation diameter of the orbiting scroll (22).

5. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 4, characterized in that: The sealing portion comprises a first sealing groove (42) and a second sealing groove (43), wherein the first sealing groove (42) is arranged on the outside of the back pressure groove (41), and the second sealing groove (43) is arranged on the inside of the back pressure groove (41); wherein, Sealing gaskets (44) are provided in both the first sealing groove (42) and the second sealing groove (43).

6. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 5, characterized in that: The sealing gasket (44) comprises a sealing spring gasket (442) and a hard sealing ring gasket (441), and the sealing spring gasket (442) is arranged below the hard sealing ring gasket (441).

7. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 6, characterized in that: The back pressure channel (221) comprises a transverse air guiding channel (2211), a first longitudinal air guiding channel (2212) and a second longitudinal air guiding channel (2213); the first longitudinal air guiding channel (2212) is used to connect the compression chamber with the transverse air guiding channel (2211); and the second longitudinal air guiding channel (2213) is used to connect the transverse air guiding channel (2211) with the movable scroll back pressure chamber (24).

8. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 7, characterized in that: The position of the second longitudinal air guiding channel (2213) matches the position of the back pressure groove (41).

9. The scroll compressor with an axially flexible pressure balancing mechanism according to claim 7, characterized in that: The opening of the transverse air guiding channel (2211) is sealed by a sealing member (222).

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