Compressor oil supply structure, compressor

Abstract

The application provides a compressor oil supply structure and a compressor. The compressor oil supply structure comprises a compression assembly, a bracket and a crankshaft. The compression assembly is arranged on the bracket, the bracket is sleeved on the crankshaft, an inner circumferential wall of the bracket, an outer circumferential wall of the crankshaft and the compression assembly enclose a cavity, an oil storage part is arranged on the crankshaft, the oil storage part is located in the cavity, a center line of the oil storage part is concentric with a center line of the crankshaft, and when the compressor is started, oil in the oil storage part can be supplied to the compression assembly to lubricate the compression assembly. The defect that when the oil supply system of the compressor is not balanced, lubricating oil cannot be supplied to the pump body in time, resulting in abnormal wear of the pump body, can be overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compressor oil supply structure and a compressor. BACKGROUND

[0002] Scroll compressors have the advantages of simple structure, small volume, light weight, low noise, high mechanical efficiency and stable operation. Among them, the dynamic and static scroll discs are the core components of scroll compressors, and the lubrication of the dynamic and static scroll disc pump bodies is a key factor affecting the reliability of the compressor.

[0003] In the existing compressor, the compressor drives the lubricating oil in the lower cover oil pool through the oil pump, and the lubricating oil is transported to the back pressure chamber through the crankshaft, thereby lubricating the running dynamic disc and static disc friction pair. However, since the oil return pipeline is arranged on the upper support and the oil return pipeline is connected with the back pressure chamber, the back pressure chamber cannot store lubricating oil. When the compressor is just started, the oil supply system of the compressor has not established balance, the lubricating oil cannot be supplied to the pump body in time, which causes abnormal wear of the pump body, thereby affecting the reliability of the whole machine. SUMMARY

[0004] Therefore, the present application provides a compressor oil supply structure and a compressor, which can overcome the defect that when the oil supply system of the compressor has not established balance, the lubricating oil cannot be supplied to the pump body in time, which causes abnormal wear of the pump body.

[0005] In order to solve the above problems, the present application provides a compressor oil supply structure, which comprises a compression assembly, a support and a crankshaft, the compression assembly is arranged on the support, the support is sleeved on the crankshaft, an inner peripheral wall of the support, an outer peripheral wall of the crankshaft and the compression assembly are enclosed to form a cavity, an oil storage member is arranged on the crankshaft, the oil storage member is located in the cavity, a center line of the oil storage member is concentric with a center line of the crankshaft, when the compressor is started, the oil in the oil storage member can be supplied to the compression assembly to lubricate the compression assembly.

[0006] In some embodiments, a fastener is arranged on the crankshaft, the crankshaft is connected with the oil storage member through the fastener, and the fastener can seal the connection between the crankshaft and the oil storage member.

[0007] In some embodiments, the crankshaft has a shaft shoulder, and the oil storage member is clamped between the shaft shoulder and the fastener.

[0008] In some embodiments, the oil storage member is in the shape of a circular truncated cone, one end of the oil storage member away from the compression assembly is fixed on the outer peripheral wall of the crankshaft, and the other end and the outer peripheral wall of the crankshaft form an opening, and the crankshaft can transport the oil in the compressor into the oil storage member through the opening.

[0009] In some embodiments, the outer peripheral wall of the oil storage member, the inner peripheral wall of the support and the compression assembly enclose an oil pool, the support is provided with an oil return flow path, and the lubricating oil in the oil storage member can at least partially flow into the oil pool and flow into the support through the oil return flow path.

[0010] In some embodiments, the other end of the oil storage member is provided with a flow guide surface, and an included angle θ1 between the flow guide surface and the central axis of the crankshaft satisfies 15°< θ1 < 45°.

[0011] In some embodiments, the axis of the rotor shaft extends in a horizontal direction, the first bottom surface is inclined towards the direction of the second bottom surface during the travel in the direction to the radial outward direction, and has a third inclined angle α3 with the vertical surface which is not 0; and the second bottom surface is inclined towards the direction away from the first bottom surface during the travel in the direction to the radial outward direction, and has a fourth inclined angle α4 with the vertical surface which is not 0.

[0012] In some embodiments, an included angle θ2 between the inner peripheral wall of the oil storage member and the central axis of the crankshaft is less than 5 degrees.

[0013] In some embodiments, the compression assembly comprises a static vortex disc and a dynamic vortex disc, the dynamic vortex disc is provided with a bearing seat, the bearing seat is located between the inner peripheral wall of the oil storage member and the crankshaft, and the bearing seat, the oil storage member and the crankshaft rotate synchronously.

[0014] In some embodiments, the side wall of the oil storage member is in a spiral structure, and the spiral direction of the spiral structure is consistent with the rotation direction of the crankshaft.

[0015] The application further provides a compressor comprising the oil supply structure of any one of the preceding embodiments.

[0016] The oil supply structure and the compressor provided by the application have the following advantages. The oil storage member is located in the cavity, the outer wall of the oil storage member separates the oil return pipeline on the support from the inside of the oil storage member, the oil storage space in the oil storage member is not directly communicated with the oil return pipeline, and thus the oil storage member always stores lubricating oil. When the compressor is started and the oil supply system of the compressor is not balanced, the lubricating oil in the oil storage member can be quickly supplied to the compression assembly, the problem of oil shortage at the starting moment of the compressor is solved, the lubricating oil can be quickly delivered to the back pressure chamber, the lubrication of the compression assembly is ensured to be sufficient, the oil storage member is arranged on the crankshaft, the oil storage member can rotate synchronously with the crankshaft, the oil stirring loss of the bearing seat of the dynamic disc is reduced, and the energy efficiency of the compressor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1Assembled perspective view of the compressor oil supply structure of the embodiment of the present application;

[0018] Figure 2 Partial enlarged view of the compressor oil supply structure of the embodiment of the present application;

[0019] Figure 3 Oil path schematic view of the compressor oil supply structure of the embodiment of the present application;

[0020] Figure 4 Structure schematic view of the oil storage member in the compressor oil supply structure of the embodiment of the present application;

[0021] Figure 5 Partial enlarged view of the oil storage member in the compressor oil supply structure of the embodiment of the present application;

[0022] Figure 6 Assembly schematic view of the oil storage member in the compressor oil supply structure of another embodiment of the present application;

[0023] Figure 7 Structure schematic view of the oil storage member in the compressor oil supply structure of another embodiment of the present application.

[0024] The reference signs are represented as:

[0025] 1, stationary scroll; 2, movable scroll; 3, bracket; 4, oil storage member; 5, crankshaft; 6, fastener; 7, oil pool; 8, oil return flow path; 9, shaft shoulder; 10, flow guide surface; 11, bearing seat; 12, groove. DETAILED DESCRIPTION

[0026] The conventional scroll compressor is mainly composed of a motor, an upper bracket, a lower bracket, a stationary scroll 1, a movable scroll 2, a cross slip ring, a crankshaft 5, etc. The motor is fixed on the shell through a hot sleeve, and the upper bracket is fixed on the shell through spot welding. The movable scroll 2 and the stationary scroll 1 are oppositely installed on the upper bracket with a phase angle difference of 180 degrees, the movable scroll 2 is driven to move by the crankshaft 5, and a series of crescent-shaped closed cavities with continuous volume change are formed by the movable scroll 2 and the stationary scroll 1, the stationary scroll 1 is fixed on the upper bracket through a screw fastener. The lower bracket is fixed on the lower support ring through a screw, and the lower support ring is fixed on the shell through spot welding.

[0027] When the compressor is running, the motor drives the crankshaft 5 to rotate, and the crank of the crankshaft 5 drives the orbiting scroll 2 to move. Under the anti-rotation restriction of the cross slip ring, the orbiting scroll 2 moves in a fixed radius around the center of the crankshaft 5. The refrigerant entering from the suction pipe is sucked into the crescent-shaped suction cavity formed by the orbiting scroll 2 and the fixed scroll 1, is discharged from the exhaust hole of the fixed scroll 1 after compression, enters the cavity between the upper cover and the fixed scroll 1, and then enters the cavity between the upper support and the motor through the exhaust groove of the fixed scroll 1 and the upper support, and part of the refrigerant enters the lower end of the motor through the through-flow groove between the motor and the shell. Finally, the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0028] However, when the conventional compressor is started, the oil supply system is not balanced, which may cause the pump body to lack oil when starting, resulting in abnormal wear of the pump body, thereby affecting the reliability of the whole machine. At the same time, when the compressor is running normally, the compressor transports the lubricating oil in the lower cover oil pool to the oil pool in the upper support through the oil pump, and the orbiting scroll 1 moves eccentrically in the oil pool, thereby generating oil stirring power consumption.

[0029] For better understanding, refer to Figures 1 to 7 According to the embodiment of the present application, a compressor oil supply structure is provided, which comprises a compression assembly, a support 3 and a crankshaft 5, the compression assembly is arranged on the support 3, the support 3 is sleeved on the crankshaft 5, an air cavity is enclosed between the inner peripheral wall of the support 3, the outer peripheral wall of the crankshaft 5 and the compression assembly, an oil storage member 4 is arranged on the crankshaft 5, the oil storage member 4 is located in the air cavity, and the oil in the oil storage member 4 can supply the compression assembly to lubricate the compression assembly when the compressor is started. In this technical solution, the oil storage member 4 is located in the air cavity, so that the oil storage member 4 always stores lubricating oil, and when the compressor is just started and the oil supply system of the compressor is not balanced, the lubricating oil in the oil storage member 4 can be quickly supplied to the compression assembly, solving the problem of lack of oil when the compressor is started, and the lubricating oil can be quickly transported to the back pressure chamber, ensuring sufficient lubrication of the compression assembly. The crankshaft 5 is provided with the oil storage member 4, the center line of the oil storage member 4 is concentric with the center line of the crankshaft 5, so that the oil storage member 4 can rotate synchronously with the crankshaft 5, reducing the oil stirring loss of the orbiting scroll bearing seat 11, and improving the energy efficiency of the compressor. The present application proposes to establish an oil storage structure inside the oil pool of the upper support, the oil storage member 4 is wrapped around the orbiting scroll bearing seat 11, the lubricating oil transported by the central hole of the crankshaft 5 is stored in the oil storage member 4 to form an oil storage pool, ensuring that the oil storage structure can quickly supply oil to the pump body when the compressor is started, and ensuring that the compressor can be safely and stably started. At the same time, the oil storage structure can also reduce the oil stirring loss generated by the eccentric operation of the orbiting scroll bearing seat 11 in the oil pool of the support 3, thereby improving the energy efficiency of the compressor.

[0030] In one specific embodiment, the crankshaft 5 is provided with a fastener 6, the crankshaft 5 is connected with the oil storage member 4 through the fastener 6, and the fastener 6 can seal the connection between the crankshaft 5 and the oil storage member 4. In this technical solution, the crankshaft 5 is connected with the oil storage member 4 through the fastener 6, preferably, the fastener 6 is a circlip, and the fastener 6 can seal the connection between the crankshaft 5 and the oil storage member 4, so that an oil storage space is formed between the oil storage member 4 and the outer peripheral wall of the crankshaft 5, thereby storing lubricating oil.

[0031] In one specific embodiment, the crankshaft 5 has a shaft shoulder 9, and the oil storage member 4 is clamped between the shaft shoulder 9 and the fastener 6. In this technical solution, the oil storage member 4 is clamped between the shaft shoulder 9 and the fastener 6, so that the oil storage member 4 can rotate synchronously with the crankshaft 5, the oil stirring loss of the bearing seat 11 of the orbiting scroll is reduced, the energy efficiency of the compressor is improved, and further, the oil storage member 4 can be welded on the shaft shoulder 9 to increase the oil storage space of the oil storage member 4 in the radial direction of the crankshaft 5.

[0032] In one specific embodiment, the oil storage member 4 is in the shape of a circular truncated cone, one end of the oil storage member 4 away from the compression assembly is fixed on the outer peripheral wall of the crankshaft 5, an opening is formed between the other end of the oil storage member 4 and the outer peripheral wall of the crankshaft 5, the center line of the oil storage member 4 is concentric with the center line of the crankshaft 5, and the crankshaft 5 can transport the oil in the compressor into the oil storage member 4 through the opening. In this technical solution, the oil storage member 4 is in the shape of a circular truncated cone, one end of the oil storage member 4 away from the compression assembly is fixed on the outer peripheral wall of the crankshaft 5, one end of the oil storage member 4 is sealed with the crankshaft 5, and an opening is formed between the other end of the oil storage member 4 and the outer peripheral wall of the crankshaft 5, so that an oil storage space is formed between the oil storage member 4 and the outer peripheral wall of the crankshaft 5, the crankshaft 5 can transport the oil in the compressor into the oil storage member 4 through the opening, and the lubricating oil can be stored in the oil storage space, so that the oil storage space always stores lubricating oil.

[0033] In one specific embodiment, the outer peripheral wall of the oil storage member 4, the inner peripheral wall of the bracket 3, and the compression assembly enclose an oil pool 7, the bracket 3 is provided with an oil return flow path 8, and the lubricating oil in the oil storage member 4 can at least partially flow into the oil pool 7 and then flow out of the bracket 3 through the oil return flow path 8. In this technical solution, the outer peripheral wall of the oil storage member 4, the inner peripheral wall of the bracket 3, and the compression assembly enclose an oil pool 7, the bracket 3 is provided with an oil return flow path 8, a part of the lubricating oil in the oil storage member 4 enters the compression assembly to lubricate the compression assembly, and another part of the lubricating oil flows back to the oil pool in the lower cover of the compressor through the oil return flow path 8, so as to form a lubricating oil circulation loop and improve the utilization rate of the lubricating oil.

[0034] In one specific embodiment, the other end of the oil storage member 4 has a flow guide surface 10, and an angle θ1 between the flow guide surface 10 and the central axis of the crankshaft 5 satisfies 15°<θ1<45°. In this technical solution, the angle θ1 between the flow guide surface 10 and the central axis of the crankshaft 5 satisfies 15°<θ1<45°, so that the oil in the oil storage member 4 can quickly flow into the compression assembly, ensuring sufficient lubrication of the compression assembly. The oil storage member 4 is arranged in the oil pool 7 of the support, is fixed on the crankshaft 5 by a clamp spring, and is sealed at the lower part with the opening upward, thus forming an oil storage pool. The oil storage member 4 is concentric with the crankshaft 5 and can rotate synchronously with the crankshaft 5. The outer arm of the oil storage member 4 is inclined upward and outward, and the inclination angle θ is less than 5 degrees. Meanwhile, an outward oil storage member 4 is arranged at the upper end of the outer arm of the oil storage member 4, and the angle between the oil storage member 4 and the central line of the oil storage member 4 is 15°<θ1<45°.

[0035] In one specific embodiment, an angle θ2 between the inner peripheral wall of the oil storage member 4 and the central axis of the crankshaft 5 is less than 5 degrees. In this technical solution, the angle θ2 between the inner peripheral wall of the oil storage member 4 and the central axis of the crankshaft 5 is less than 5 degrees, so that the oil storage member 4 can have the maximum oil storage space in the cavity, the oil storage capacity of the oil storage member 4 is improved, and when the compressor is started and the oil supply system of the compressor has not established balance, the lubricating oil in the oil storage member 4 can be quickly supplied to the compression assembly, solving the problem of oil shortage when the compressor is started.

[0036] In one specific embodiment, the compression assembly comprises a static scroll 1 and a dynamic scroll 2, the dynamic scroll 2 has a bearing seat 11, and the bearing seat 11 is located between the inner peripheral wall of the oil storage member 4 and the crankshaft 5, and the bearing seat 11, the oil storage member 4 and the crankshaft 5 rotate synchronously. In this technical solution, the compression assembly comprises a static scroll 1 and a dynamic scroll 2, the dynamic scroll 2 has a bearing seat 11, and the bearing seat 11 is located in the cavity. In the prior art, when the compressor is started, the bearing seat 11 does eccentric motion in the cavity, thereby generating oil stirring power consumption to the lubrication in the cavity. In the compressor oil supply structure of the present application, the bearing seat 11 is located between the inner peripheral wall of the oil storage member 4 and the crankshaft 5, and the bearing seat 11, the oil storage member 4 and the crankshaft 5 rotate synchronously, thereby reducing the oil stirring loss of the dynamic disc bearing seat 11 to improve the energy efficiency of the compressor. The compressor passes the lubricating oil in the lower cover oil pool through the gap between the central hole of the crankshaft 5, the crankshaft crank and the dynamic disc bearing seat 11 to the oil storage pool formed by the oil storage member 4, and quickly fills the oil storage pool. Because the oil storage member 4 rotates synchronously with the crankshaft 5, and the outer arm inclined structure of the oil storage member 4 and the flow guide surface 10 are under the rotation of the crankshaft 5, the lubricating oil in the oil storage pool of the oil storage member 4 is quickly transported to the PTFE groove 12 sealing groove of the support 3, the groove 12 has a sealing ring, and then enters the back pressure chamber, thereby lubricating the friction pair of the running dynamic scroll 2 and the static scroll 1. It should be noted that the so-called back pressure chamber is a sealed chamber formed by the support 3, the sealing ring and the dynamic scroll 2. The lubricating oil entering the chamber is brought into the friction pair of the dynamic scroll 2 and the static scroll 1 by the movement of the dynamic scroll 2. In addition, part of the lubricating oil in the oil storage pool overflows into the oil pool 7 of the support 3, and then flows back to the bottom of the oil pool of the lower cover through the oil return flow path 8.

[0037] When the compressor is stopped, the oil storage pool of the oil storage member 4 will always store a certain amount of lubricating oil. When the compressor is started next time, the lubricating oil in the oil storage pool can quickly supply oil to the back pressure chamber through the flow guide structure of the oil storage member 4 before the oil supply balance is established, thereby ensuring that the dynamic and static scrolls can be started reliably and stably. In addition, because the oil storage member 4 rotates synchronously and concentrically with the crankshaft 5, and the bearing seat 11 of the dynamic scroll 2 is wrapped by the oil storage member 4 and rotates synchronously with the oil storage member 4, the oil stirring loss of the dynamic disc bearing seat 11 is reduced to improve the energy efficiency of the compressor.

[0038] In one specific embodiment, the side wall of the oil storage member 4 is a spiral structure, and the spiral direction of the spiral structure is consistent with the rotation direction of the crankshaft 5. In this technical solution, the side wall of the oil storage member 4 is a spiral structure, so that the inner and outer walls of the oil storage member 4 are spiral. When the compressor is started, the lubricating oil in the oil storage member 4 can be quickly transported to the upper end of the crankshaft 5 through the spiral structure, so that the lubricating oil enters the compression assembly.

[0039] The present application also provides a compressor comprising the above-mentioned compressor oil supply structure.

[0040] The above description is merely that of the preferred embodiments of the application, and is not intended to limit the application. Any modification, equivalent replacements, and improvements made within the spirit and principle of the application shall be included in the protection scope of the application. The above description is merely the preferred embodiments of the application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, and these improvements and modifications shall be considered as the protection scope of the application.

Claims

1. A compressor oil supply structure characterized by comprising: The compressor structure comprises a compression assembly, a bracket (3) and a crankshaft (5), the compression assembly is arranged on the bracket (3), the bracket (3) is sleeved on the crankshaft (5), an inner circumferential wall of the bracket (3), an outer circumferential wall of the crankshaft (5) and the compression assembly enclose a cavity, the crankshaft (5) is provided with an oil storage part (4), the oil storage part (4) is located in the cavity, a center line of the oil storage part (4) is concentric with a center line of the crankshaft (5), and when the compressor is started, oil in the oil storage part (4) can be supplied to the compression assembly to lubricate the compression assembly. The crankshaft (5) is provided with a fastener (6), the crankshaft (5) is connected with the oil storage part (4) through the fastener (6), and the fastener (6) can seal a connection position of the crankshaft (5) and the oil storage part (4). The crankshaft (5) has an axle shoulder (9), and the oil storage part (4) is clamped between the axle shoulder (9) and the fastener (6). The oil storage part (4) is in a circular truncated cone shape, one end of the oil storage part (4) away from the compression assembly is fixed on the outer circumferential wall of the crankshaft (5), and an opening is formed between the other end of the oil storage part (4) and the outer circumferential wall of the crankshaft (5), and the crankshaft (5) can transport oil in the compressor to the oil storage part (4) through the opening.

2. The oil supply structure of the compressor according to claim 1, characterized by: An inner circumferential wall of the oil storage part (4), the inner circumferential wall of the bracket (3) and the compression assembly enclose an oil pool (7), the bracket (3) is provided with an oil return flow path (8), and lubricating oil in the oil storage part (4) can at least partially flow into the oil pool (7) and then flow into the bracket (3) through the oil return flow path (8).

3. The oil supply structure for a compressor according to claim 2, characterized by: The other end of the oil storage part (4) has a flow guide surface (10), and an included angle θ1 between the flow guide surface (10) and a central axis of the crankshaft (5) satisfies 15°<θ1<45°.

4. The oil supply structure of the compressor according to claim 2, characterized by: An included angle θ2 between an inner circumferential wall of the oil storage part (4) and the central axis of the crankshaft (5) is less than 5°.

5. The compressor oil supply structure of claim 2, wherein: The compression assembly comprises a static scroll (1) and a dynamic scroll (2), the dynamic scroll (2) has a bearing seat (11), the bearing seat (11) is located between the inner circumferential wall of the oil storage part (4) and the crankshaft (5), and the bearing seat (11), the oil storage part (4) and the crankshaft (5) rotate synchronously.

6. The compressor oil supply structure of claim 2, wherein: A side wall of the oil storage part (4) is in a spiral structure, and a spiral direction of the spiral structure is consistent with a rotating direction of the crankshaft (5).

7. The compressor oil supply structure of claim 2, wherein: The compressor structure comprises the oil supply structure according to any one of claims 1-7.

8. A compressor characterized by: ​

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