Scroll compressor

Abstract

A scroll compressor, comprising: a compression part (1), the compression part (1) comprising an orbiting scroll (12) and a fixed scroll (11), and the orbiting scroll (12) being provided with a contact surface (120); and a main bearing housing (2), the main bearing housing (2) being provided with a thrust plate (3), the thrust plate (3) being provided with a thrust surface (30) abutting against the contact surface (120), an oil delivery passage (31) being provided on the thrust surface (30), a flow restriction part (314) being provided on the oil delivery passage (31), and the flow restriction part (314) being used for throttling a lubricating oil on the oil delivery passage (31), wherein when the scroll compressor is in a working state, the lubricating oil is throttled on the oil delivery passage (31) by means of the flow restriction part (314), and flows out of the thrust surface (30). A good lubricating effect on the thrust surface of the compressor is achieved, and heat is carried away by means of the lubricating oil.

Description

Scroll compressor

[0001] This application claims priority to the Chinese patent application No. 202411048720.5 filed on August 01, 2024 with the China Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of scroll compressors, for example, relates to a scroll compressor. BACKGROUND

[0003] The scroll compressor is a volumetric compression compressor, and its compression components mainly include a dynamic scroll plate and a static scroll plate. The scroll compressor realizes the compression of gas by forming a continuously changing closed volume through the relative revolution of the dynamic scroll plate and the static scroll plate.

[0004] The scroll compressor of the heat pump needs to operate at an extremely low ambient temperature, which requires the compressor to operate stably at an extremely low evaporation temperature. However, the extremely low evaporation temperature will result in extremely low gas flow, which brings great challenges to the lubrication of the thrust surface of the dynamic scroll plate and the main bearing seat that bear the maximum force.

[0005] A compressor in the prior art has a contact surface of a dynamic scroll end plate and / or a thrust surface of a thrust plate, and an oil delivery groove in communication with the radial outer side and / or the radial inner side of the area where the thrust surface and the contact surface are in contact with each other. Lubricating oil can flow in the oil delivery groove to lubricate the contact surface of the dynamic scroll end plate and the thrust surface of the thrust plate. In actual application, the dynamic scroll plate performs scroll motion, the oil outlet hole intermittently communicates with the oil delivery groove, the lubricating oil flowing into the oil delivery groove is limited, and when the oil outlet hole is not intermittently communicated with the oil delivery groove, the lubricating oil will quickly flow out at the termination end, resulting in rapid decrease of the lubricating oil pressure and liquid level in the oil delivery groove. Therefore, the lubrication effect of the thrust surface is poor. SUMMARY

[0006] The embodiment of the present application provides a scroll compressor, which comprises:

[0007] A compression part, which comprises a dynamic scroll plate and a static scroll plate matched with the dynamic scroll plate, and the dynamic scroll plate has a contact surface;

[0008] A main bearing seat, which is provided with a thrust plate, the thrust plate is arranged between the compression part and the main bearing seat, and the thrust plate has a thrust surface abutting against the contact surface; wherein

[0009] The thrust surface is provided with an oil delivery channel, and the oil delivery channel is provided with a flow limiting part for intercepting the lubricating oil on the oil delivery channel; under the working state of the scroll compressor, the lubricating oil is intercepted by the flow limiting part on the oil delivery channel and flows out of the thrust surface. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 is a schematic diagram of the oil supply mechanism of the thrust plate of the scroll compressor;

[0011] Fig. 2 is a sectional view of the oil supply mechanism of the thrust plate of the scroll compressor;

[0012] Fig. 3 is a partial enlarged view of the oil supply mechanism of the thrust plate of the scroll compressor;

[0013] Fig. 4 is a schematic diagram of the communication groove of the thrust plate;

[0014] Fig. 5 is a schematic diagram of another embodiment of the communication groove of the thrust plate;

[0015] Fig. 6 is a schematic diagram of the longitudinal section of the oil delivery groove of the thrust plate being rectangular;

[0016] Fig. 7 is a schematic diagram of the longitudinal section of the oil delivery groove of the thrust plate being V-shaped;

[0017] Fig. 8 is a schematic diagram of the longitudinal section of the oil delivery groove of the thrust plate being semicircular;

[0018] Fig. 9 is a partial enlarged view of a flow limiting part structure on the thrust plate;

[0019] Fig. 10 is a partial enlarged view of another flow limiting part structure on the thrust plate;

[0020] Fig. 11 is a partial enlarged view of another flow limiting part structure on the thrust plate;

[0021] Fig. 12 is a partial enlarged view of another flow limiting part structure on the thrust plate.

[0022] The reference signs involved in the drawings are as follows: compression part 1, static scroll plate 11, dynamic scroll plate 12, contact surface 120, oil supply channel 121, oil inlet hole 1211, oil outlet hole 1212, oil delivery hole 1213, main bearing seat 2, thrust plate 3, thrust surface 30, oil delivery channel 31, oil storage end 311, oil discharge end 312, oil delivery groove 313, flow limiting part 314, inlet 3141, outlet 3142, funnel structure 3143, boss 3144, inclined surface 3145, cross bar 3146, communication groove 315. DETAILED DESCRIPTION

[0023] As shown in FIG. 1-12, the application discloses a scroll compressor, comprising: a compression part 1, the compression part 1 comprising a dynamic scroll plate 12 and a static scroll plate 11 cooperating with the dynamic scroll plate 12, the dynamic scroll plate 12 having a contact surface 120; a main bearing seat 2, the main bearing seat 2 being provided with a thrust plate 3, the thrust plate 3 being between the compression part 1 and the main bearing seat 2, the thrust plate 3 having a thrust surface 30 abutting against the contact surface 120. The thrust surface 30 is provided with an oil delivery channel 31, the oil delivery channel being provided with a flow limiting part 314, the flow limiting part 314 being used for intercepting the lubricating oil on the oil delivery channel 31; under the working state of the scroll compressor, the lubricating oil flows out of the thrust surface 30 by intercepting the flow limiting part 314 on the oil delivery channel 31.

[0024] In some embodiments, the oil delivery channel 31 further comprises an oil delivery groove 313 and an oil discharge end 312 communicating with the oil delivery groove 313. Under the working state of the scroll compressor, the lubricating oil flows out of the thrust surface 30 by sequentially passing through the oil delivery groove 313 and the oil discharge end 312. The oil discharge end 312 has a flow limiting part 314 for intercepting the lubricating oil in the oil delivery channel 31.

[0025] In the application, the oil delivery channel 31 is opened on the thrust surface 30, the oil discharge end 312 is arranged at the terminal end of the oil delivery channel 31, and the flow limiting part 314 is arranged at the end of the oil discharge end 312. The flow limiting part 314 reduces the flow rate of the lubricating oil in the oil delivery groove 313, improves the oil pressure of the lubricating oil in the oil delivery groove 313, and enables the lubricating oil in the oil delivery groove 313 to maintain the required oil pressure and liquid level for a longer time, so that the lubricating oil can better contact the contact surface 120 and improve the lubricating effect between the thrust surface 30 and the contact surface 120.

[0026] In some embodiments of the application, the oil discharge end 312 communicates with the inner side or the outer side of the thrust surface 30. The thrust surface 30 is an annular surface, the inner side is the inner ring of the annular surface, and the outer side is the outer ring of the annular surface. The oil discharge end 312 can optionally communicate with the outer side or the inner side of the thrust surface 30, so that the lubricating oil in the oil delivery groove 313 is discharged out of the thrust surface 30 through the oil discharge end 312.

[0027] In some embodiments of the present application, the oil delivery groove 313 is provided with at least two, and in addition, the oil delivery groove 313 is a non-closed annular groove; the at least two oil delivery grooves 313 are arranged in a spaced and substantially concentric manner. The number of the oil delivery grooves 313 determines the contact area of the lubricating oil with the contact surface 120 and the cooling effect of the thrust plate 3. In the same size of the thrust plate 3, the more the number of the oil delivery grooves 313, the greater the contact area of the lubricating oil with the contact surface 120, the better the lubrication effect, and the better the heat dissipation effect; the less the number of the oil delivery grooves 313, the smaller the contact area of the lubricating oil with the contact surface 120, the worse the lubrication effect, and the worse the heat dissipation effect. In the present embodiment, the number of the oil delivery grooves 313 is two.

[0028] In some embodiments of the present application, the oil delivery grooves 313 are communicated through the communication grooves 315.

[0029] In some embodiments of the present application, the communication grooves 315 are arranged in a radial direction or the communication grooves 315 are arranged in a tangential direction of at least one oil delivery groove 313.

[0030] The provision of the communication grooves 315 increases the contact area of the lubricating oil with the contact surface 120, and also improves the flowability of the lubricating oil between the oil delivery grooves 313, so that the lubricating oil in the oil delivery grooves 313 is fully exchanged, the temperature difference of the lubricating oil in the two oil delivery grooves 313 is reduced, and the service life of the thrust plate 3 is improved.

[0031] In some embodiments of the present application, the flow passage cross-sectional area at the flow limiting portion 314 is smaller than the flow passage cross-sectional area of any cross section in the oil delivery groove 313, so as to reduce the oil flow at the flow limiting portion 314, so that the oil delivery groove 313 is always filled with lubricating oil, and the lubrication effect of the thrust surface 20 and the contact surface 120 is further improved.

[0032] In some embodiments of the present application, as shown in FIGS. 9-12, the flow limiting portion 314 is at least one of the following:

[0033] a funnel structure 3143, and in the flow limiting portion 314 of the funnel structure, the flow passage cross-sectional area near the outlet 3142 of the flow limiting portion 314 is smaller than the flow passage cross-sectional area near the inlet 3141 of the flow limiting portion 314;

[0034] an upwardly protruding boss; 3144

[0035] an upwardly protruding inclined surface; 3145

[0036] a filter screen;

[0037] a horizontal bar 3146 connected to the side wall of the oil discharge end 312.

[0038] The function of the flow limiting portion 314 is mainly to reduce the area of the oil outlet and reduce the discharge flow of the lubricating oil, therefore, the flow limiting portion 314 is not limited to the above optional structures.

[0039] In some embodiments of the present application, the oil delivery channel 31 further comprises an oil storage end 311, which is in communication with the inlet of the oil delivery groove 313, and an oil discharge end 312, which is in communication with the outlet of the oil delivery groove 313; in the working state, the lubricating oil flows out of the thrust face 30 in sequence through the oil storage end 311, the oil delivery groove 313 and the oil discharge end 312. In addition, the dynamic scroll 12 is provided with an oil supply channel 121, which is positioned to match the position of the oil storage end 311, and the oil supply channel 121 supplies lubricating oil to the oil storage end 311. The oil supply channel 121 is in communication with the oil storage end 311, so that the lubricating oil enters the oil storage end 311, and then flows out of the thrust face 30 through the oil delivery groove 313 and the oil discharge end 312, forming a cycle and taking away the heat generated by the friction between the contact face 120 and the thrust face 30.

[0040] On the other hand, the lubricating oil can also be supplied to the contact face 120 or the thrust face 30 in other ways, such as by rotating the balance block provided on the drive shaft to throw the lubricating oil between the contact face 120 and the thrust face 30.

[0041] In some embodiments of the present application, the oil supply channel 121 has an oil outlet hole 1212, which is positioned to match the position of the oil storage end 311, so that in the working state, the oil supply channel 121 moves with the dynamic scroll 12, and the oil outlet hole 1212 of the oil supply channel 121 is always in communication with the oil storage end 311. The oil supply channel 121 also has an oil inlet hole 1211 and an oil delivery hole 1213, and the oil inlet hole 1211 is in communication with the oil outlet hole 1212 through the oil delivery hole 1213. The oil inlet hole 1211 is provided at the bottom of the dynamic scroll 12 and is in communication with the oil channel of the drive shaft, and the lubricating oil in the oil pool at the bottom of the compressor flows into the oil delivery hole 1213 through the oil channel and the oil inlet hole 1211, and then flows out of the oil outlet hole 1212 and into the oil storage end 311.

[0042] In some embodiments of the present application, the oil storage end 311 is a circular groove. The oil outlet hole 1212 rotates along the outer periphery of the circular groove, improving the matching degree of the two.

[0043] In addition, the cross section of the oil delivery groove 313 can be provided in various shapes, and can be rectangular, semicircular or V-shaped.

[0044] The working mode of the present application is as follows:

[0045] When the compressor is working, the lubricating oil in the bottom oil pool is pumped by the oil pump to flow through the oil channel of the main shaft, the oil inlet hole 1211 of the moving scroll plate 12, the oil delivery hole 1213, and the oil outlet hole 1212; during the translational movement of the moving scroll plate 12, the oil outlet hole 1212 is always in communication with the oil storage end 311 of the oil delivery channel 31 on the thrust surface 30, under the action of the oil pump, a large amount of lubricating oil enters the oil storage end 311, and the pressure of the oil storage end 311 is greater than that of the oil discharge end 312, so that the lubricating oil in the oil storage end 311 flows along the oil delivery groove 313, the lubricating oil contacts the contact surface 120, and the lubricating effect is achieved. Furthermore, on the one hand, the flow limiting part 314 can reduce the flow rate of the lubricating oil in the oil delivery groove 311 and increase the oil pressure of the lubricating oil in the oil delivery groove 313; on the other hand, after the lubricating oil is discharged from the oil delivery channel 31 through the flow limiting part 314, the heat generated by the friction between the contact surface 120 and the thrust surface 30 is removed, and the service life of the compressor is improved.

Claims

1. A scroll compressor, comprising: a compression unit, the compression unit comprising an orbiting scroll and a fixed scroll cooperating with the orbiting scroll, the orbiting scroll having a contact surface; a main bearing housing, the main bearing housing being provided with a thrust plate, the thrust plate being between the compression unit and the main bearing housing, the thrust plate having a thrust surface abutting against the contact surface; wherein the thrust surface is provided with an oil delivery channel, the oil delivery channel being provided with a flow limiting portion, the flow limiting portion being configured to intercept the lubricating oil on the oil delivery channel; in a working state of the scroll compressor, the lubricating oil flows out of the thrust surface by being intercepted by the flow limiting portion.

2. The scroll compressor of claim 1, wherein, the oil delivery channel further comprises an oil delivery groove and an oil discharge end, the oil discharge end being in communication with the oil delivery groove, and the oil discharge end being in communication with the flow limiting portion at its end; in the working state of the scroll compressor, the lubricating oil flows out of the thrust surface by being intercepted by the flow limiting portion after sequentially passing through the oil delivery groove and the oil discharge end.

3. The scroll compressor of claim 2, wherein, the oil discharge end is in communication with the inner side or the outer side of the thrust surface.

4. The scroll compressor of claim 3, wherein, the oil delivery groove is a non-closed annular groove.

5. The scroll compressor of claim 4, wherein, the oil delivery groove is provided with at least two oil delivery grooves.

6. The scroll compressor of claim 5, wherein, the at least two oil delivery grooves are arranged in a spaced and substantially concentric manner.

7. The scroll compressor of claim 5 or 6, wherein, the at least two oil delivery grooves are in communication through a communication groove.

8. The scroll compressor of claim 7, wherein, the communication groove is arranged in a radial direction or arranged in a tangential direction of at least one of the oil delivery grooves.

9. The scroll compressor of claim 2, wherein, a flow passage cross-sectional area of the flow limiting portion is smaller than a flow passage cross-sectional area of any cross section of the oil delivery groove.

10. The scroll compressor of claim 2, wherein, the flow limiting portion is at least one of: a funnel structure, and in the funnel structure, a flow passage cross-sectional area close to an outlet of the flow limiting portion is smaller than a flow passage cross-sectional area close to an inlet of the flow limiting portion; an upwardly protruding boss; an upwardly protruding inclined surface; a filter screen; a horizontal bar connected to a sidewall of the oil discharge end.

11. The scroll compressor of claim 2, wherein, the oil delivery channel further comprises an oil storage end, the oil storage end being in communication with an inlet of the oil delivery groove, and the oil discharge end being in communication with an outlet of the oil delivery groove; in the working state of the scroll compressor, the lubricating oil flows out of the thrust surface by sequentially passing through the oil storage end, the oil delivery groove and the oil discharge end.

12. The scroll compressor of claim 11, wherein, the orbiting scroll is provided with an oil supply channel, an oil outlet hole of the oil supply channel is positioned to match a position of the oil storage end, so that in the working state of the scroll compressor, the oil outlet hole of the oil supply channel is always in communication with the oil storage end when the oil supply channel moves with the orbiting scroll.

13. The scroll compressor of claim 11 or 12, wherein, the oil storage end is a circular groove.

14. The scroll compressor of claim 2, wherein, a cross section of the oil delivery groove is one of a rectangular shape, a semicircular shape and a V shape.

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