Pump body assembly, scroll compressor

Abstract

The utility model provides a kind of pump body assembly, scroll compressor, pump body assembly includes the static disc and the dynamic disc of opposition, the dynamic disc is formed with bearing chamber on the side end face of the static disc far away from it, further include crankshaft, the first end rotation of the crankshaft is connected in the bearing chamber, the central oil channel that passes through its both ends is formed in the crankshaft, high-pressure oil supply oil channel is formed in the dynamic disc base plate of the dynamic disc, lubricating oil groove is formed in the static disc base plate of the static disc, the opening of the lubricating oil groove is towards the dynamic disc base plate, the oil channel entrance of the high-pressure oil supply oil channel is on the inner wall of the bearing chamber, the oil channel export of the high-pressure oil supply oil channel and the first port of the lubricating oil groove can be intermittently connected.The utility model can realize the cooperation surface lubrication and sealing between static disc and dynamic disc, ensure the full lubrication of both to prevent static disc and dynamic disc wear, improve the service life of component, reduce the operating noise due to insufficient lubrication.

Description

Technical Field

[0001] This utility model belongs to the field of compressor design technology, specifically relating to a pump body assembly and a scroll compressor. Background Technology

[0002] Scroll compressors have advantages such as simple structure, small size, light weight, low noise, high mechanical efficiency, and stable operation. With the continuous iteration and upgrading of air conditioning technology, scroll compressors are developing towards higher speed and efficiency. However, under high-speed and harsh operating conditions, the moving and stationary disc end faces of scroll compressors are prone to wear due to poor lubrication, which also leads to higher noise levels during compressor operation. Utility Model Content

[0003] Therefore, this utility model provides a pump body assembly and a scroll compressor, which can overcome the technical problems of poor lubrication between the moving and stationary disc end faces of scroll compressors in related technologies, resulting in wear and high noise.

[0004] To address the aforementioned problems, this utility model provides a pump body assembly, including a stationary disc and a moving disc facing each other. A bearing chamber is formed on the end face of the moving disc away from the stationary disc. The assembly also includes a crankshaft, with a first end rotatably connected to the bearing chamber. A central oil passage is formed in the crankshaft, extending through both ends. A high-pressure oil supply passage is formed in the moving disc base plate of the moving disc. A lubricating oil groove is formed in the stationary disc base plate of the stationary disc, with the opening of the lubricating oil groove facing the moving disc base plate. The inlet of the high-pressure oil supply passage is located on the inner wall of the bearing chamber, and the outlet of the high-pressure oil supply passage is intermittently connected to the first port of the lubricating oil groove.

[0005] In some embodiments, the oil passage inlet is located on the bottom wall of the bearing chamber.

[0006] In some embodiments, the high-pressure oil supply passage further includes a connecting section extending radially along the moving disc, the connecting section connecting the oil passage inlet and the oil passage outlet.

[0007] In some implementations, a throttling pin is assembled within the connecting segment.

[0008] In some embodiments, the first port of the lubricating oil groove is an arc groove, which is projected onto any radial plane of the stationary disc, and the flow area of ​​the arc groove is greater than the flow area of ​​the oil passage outlet.

[0009] In some embodiments, the lubricating oil groove extends along the curvature of the stationary vortex teeth of the stationary disc and is located in the outer region of the stationary vortex teeth.

[0010] In some embodiments, the lubricating oil groove is within the range of motion of the moving disk substrate.

[0011] In some embodiments, the lubricating oil groove extends from its first port to its second port, getting closer and closer to the compression cavity formed between the moving disc and the stationary disc, and is located on the periphery of the compression cavity.

[0012] In some embodiments, the minimum distance between the second port and the compression chamber is Δ, where 1mm ≤ Δ ≤ 3mm.

[0013] This utility model also provides a scroll compressor, including the pump body assembly described above.

[0014] The pump body assembly and scroll compressor provided by this utility model have the following beneficial effects: A high-pressure oil supply channel formed within the moving plate base plate, directly connected to the bearing chamber, can more efficiently guide the lubricating oil pumped from the central oil channel into the high-pressure oil supply channel, and further into the lubricating oil groove formed on the stationary plate. This enables lubrication and sealing of the mating surfaces between the stationary and moving plates, ensuring sufficient lubrication to prevent wear on both the stationary and moving plates, improving component lifespan, and reducing operating noise caused by insufficient lubrication. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the internal structure of the scroll compressor according to an embodiment of the present invention; Figure 2 yes Figure 1 A magnified schematic diagram of part of the structure of the scroll compressor in the image; Figure 3 yes Figure 1 A three-dimensional structural diagram of the moving disk in the image; Figure 4 yes Figure 1 The figure shows the axial projection of the stationary disk, and the motion area formed by the outer circle of the moving disk during the translation of the moving disk. Figure 5 This is a schematic diagram of the state in which the high-pressure oil supply channel and the lubricating oil tank are connected (that is, the oil channel outlet intersects with the first port) in this utility model. Figure 6This is a schematic diagram of the state under which the high-pressure oil supply channel and the lubricating oil tank are disconnected (that is, the oil channel outlet and the first port do not intersect).

[0017] The attached figures are labeled as follows: 1. Stationary disc; 11. Stationary disc base plate; 12. Stationary scroll gear; 2. Moving disc; 20. Bearing chamber; 21. Moving disc base plate; 22. Moving scroll gear; 3. Crankshaft; 31. Central oil passage; 41. Upper bracket; 42. Lower bracket; 43. Lower support ring; 5. Cross slip ring; 61. Upper cover; 62. Housing; 63. Lower cover; 71. Motor rotor; 72. Motor stator; 8. Oil pump; 100. Lubricating oil groove; 101. First port; 102. Second port; 200. High-pressure oil supply passage; 201. Oil passage inlet; 202. Oil passage outlet; 203. Throttling pin; 300. Movement range; 400. Compression chamber. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0022] See also Figures 1 to 6 As shown in the figure, according to an embodiment of the present invention, a scroll compressor is provided. The scroll compressor includes a pump body assembly (not labeled in the figure), an upper bracket 41, a lower bracket 42, a lower support ring 43, a motor (not labeled in the figure), a crankshaft 3, and other components. The pump body assembly is integrally assembled in the accommodating cavity of the compressor housing. The compressor housing includes a housing 62 and an upper cover 61 and a lower cover 63 welded to the upper and lower ends of the housing 62. The motor includes a motor rotor 71 and a motor stator 72, wherein the motor stator 72 is fixed to the inner wall surface of the housing 62 by a heat fitting, and the motor rotor 71 is fixedly fitted onto the radial outer peripheral wall of the crankshaft 3. The upper bracket 41 is fixed to the housing 62 by spot welding. On the inner wall of 2, the pump body assembly includes a stationary disk 1 and a moving disk 2 facing each other. The stationary disk 1 and the moving disk 2 are mounted on the upper bracket 41 with a phase angle difference of 180°. A bearing chamber 20 is formed on the side end face of the moving disk 2 away from the stationary disk 1. The first end of the crankshaft 3 is rotatably connected to the bearing chamber 20. The moving disk 2 moves under the drive of the crankshaft 3 and meshes with the stationary disk 1 to form a series of mutually isolated crescent-shaped sealed containers with continuously changing volumes. The stationary disk 1 is fixed to the top surface of the upper bracket 41 by screw fasteners (not indicated in the figure). The lower bracket 42 is fixed to the lower support ring 43 by screws. The lower support ring 43 is fixed to the inner wall of the outer shell 62 by spot welding.

[0023] When the scroll compressor is running, the motor drives the crankshaft 3 to rotate. The crank of the crankshaft 3 drives the moving disk 2 to move. Under the anti-rotation restriction of the cross slip ring 5, the moving disk 2 moves around the center of the crankshaft 3 with a fixed radius e. The refrigerant entering from the suction pipe is sucked into the crescent-shaped suction chamber formed by the moving disk 2 and the stationary disk 1. After compression, it is discharged from the exhaust hole on the stationary disk 1 (not marked in the figure) and enters the cavity between the upper cover 61 and the stationary disk 1. Part of it enters the lower end of the motor through the flow groove between the motor and the outer casing 62. Finally, the high-pressure refrigerant is discharged through the exhaust pipe.

[0024] A central oil passage 31 is formed inside the crankshaft 3, running through both ends of it. An oil pump 8 is provided at the bottom end (i.e., the inlet) of the central oil passage 31. When the crankshaft 3 rotates, the oil pump 8 pumps oil from the bottom oil sump of the scroll compressor into the central oil passage 31. A high-pressure oil supply passage 200 is formed inside the moving plate base 21 of the moving plate 2. A lubricating oil groove 100 is formed inside the stationary plate base 11 of the stationary plate 1. The opening of the lubricating oil groove 100 faces the moving plate base 21. The oil passage inlet 201 of the high-pressure oil supply passage 200 is located on the inner wall of the bearing chamber 20. The oil passage outlet 202 of the high-pressure oil supply passage 200 can be intermittently connected to the first port 101 of the lubricating oil groove 100.

[0025] In this technical solution, a high-pressure oil supply channel 200 directly connected to the bearing chamber 20 is formed within the moving plate substrate 21. This allows for more efficient guidance of the lubricating oil pumped from the central oil channel 31 into the high-pressure oil supply channel 200, and further into the lubricating oil groove 100 formed on the stationary plate 1. This achieves lubrication and sealing of the mating surfaces between the stationary plate 1 and the moving plate 2, ensuring sufficient lubrication to prevent wear on both the stationary plate 1 and the moving plate 2, improving component lifespan, and reducing operating noise caused by insufficient lubrication. It should be noted that the high-pressure oil supply channel 200 formed within the moving plate 2 in this application is a closed channel with a relatively small flow diameter. This ensures that the high-pressure oil enters the downstream lubricating oil groove 100 more efficiently and quickly. The lubricating oil groove 100 is designed as an open groove structure, ensuring that the lubricating oil entering it has a large lubrication area.

[0026] In some embodiments, the oil passage inlet 201 is located on the bottom wall of the bearing chamber 20, so that the extension direction of the oil passage inlet 201 is approximately parallel to the extension direction of the central oil passage 31. This facilitates the efficient entry of the lubricating oil pumped into the central oil passage 31 into the high-pressure oil supply passage 200, resulting in a simpler structural design, reduced processing difficulty, and less attenuation of oil supply power.

[0027] In some embodiments, the high-pressure oil supply passage 200 further includes a connecting section (not indicated in the figure) extending radially along the moving plate 2, the connecting section connecting the oil passage inlet 201 and the oil passage outlet 202.

[0028] In this technical solution, the connecting section extends radially along the moving plate 2, which can reduce the processing and manufacturing difficulty of the high-pressure oil supply channel 200 in the moving plate 2.

[0029] In some embodiments, a throttling pin 203 is assembled within the connecting segment, and the aforementioned throttling pin 203 may be, for example, a throttling screw.

[0030] In this technical solution, a throttling pin 203 is further provided in the high-pressure oil supply channel 200, which can design the flow diameter of the aforementioned connecting section to be relatively large, thereby preventing the increase in the difficulty of channel processing caused by the flow diameter being too small, while also preventing the phenomenon of excessive high-frequency oil supply caused by the flow diameter being too large.

[0031] In some embodiments, the first port 101 of the lubricating oil groove 100 is an arc groove, which is projected onto any radial plane of the stationary plate 1, and the flow area of ​​the arc groove is greater than the flow area of ​​the oil passage outlet 202.

[0032] In this technical solution, by designing the first port 101 of the lubricating oil groove 100 as an arc groove and designing the flow area of ​​the arc groove to be greater than the flow area of ​​the oil passage outlet 202, the time during which the oil passage outlet 202 can intersect and connect with the arc groove during the translation of the moving plate 2 is increased, ensuring that the alternating connection oil supply time is sufficient, thereby ensuring sufficient lubrication. The specific size can be reasonably determined according to the test results.

[0033] In some embodiments, the lubricating oil groove 100 extends along the curvature direction of the stationary volute tooth 12 of the stationary disk 1 and is located in the outer region of the stationary volute tooth 12. That is, the lubricating oil groove 100 in this utility model is specifically set in the outer region of the compression cavity 400 formed by the stationary disk 1 and the moving disk 2, so as to prevent excessive high-pressure lubricating oil from entering the compression cavity 400, which would lead to increased compressor power consumption and reduced performance. At the same time, it can also prevent excessive lubricating oil from entering the compression cavity 400, which would increase the oil discharge rate and thus affect the cooling efficiency of the air conditioning system using it.

[0034] In some embodiments, the lubricating oil groove 100 is located within the movement range 300 of the moving disk base plate 21. It is understood that the aforementioned movement range refers to the annular region formed by the maximum outer contour envelope that the outer circle of the moving disk base plate 21 can form during the translation of the moving disk 2. Figure 4 As shown in the figure.

[0035] In this technical solution, the lubricating oil tank 100 is located within the movement range of the moving plate 21, which can ensure that the lubricating oil in the lubricating oil tank 100 does not overflow to other areas and cause leakage.

[0036] In some embodiments, the lubricating oil groove 100 extends from its first port 101 to its second port 102, getting closer and closer to the compression cavity 400 formed between the moving disk 2 and the stationary disk 1, and is located on the periphery of the compression cavity 400. Specifically, the minimum distance between the second port 102 and the compression cavity 400 is Δ, 1mm≤Δ≤3mm.

[0037] In this technical solution, the lubricating oil groove 100 is designed to extend closer and closer to the compression chamber 400, and the minimum distance between its second port 102 and the compression chamber 400 is limited. This ensures that the lubricating oil in the lubricating oil groove 100 can penetrate into the compression chamber 400 under the power of pressure difference, thereby maintaining the oil supply power of the high pressure oil circuit while preventing the adverse effects of too much lubricating oil entering the compression chamber 400.

[0038] During compressor operation, oil pump 8 delivers lubricating oil from the oil sump at the bottom of the lower cover 63 through the central oil passage 31 of the crankshaft 3 to the bearing chamber 20 on the upper end of the compressor, i.e., the aforementioned moving plate 2. Then, it delivers the oil through the high-pressure oil supply passage 200 formed on the moving plate 2 to the lubricating oil groove 100 formed in the stationary plate 1. The oil passage outlet 202 of the moving plate 2 is intermittently connected to the first port 101 of the lubricating oil groove 100 in the stationary plate 1, thereby delivering lubricating oil to the entire lubricating oil groove 100 to lubricate the end face friction pair of the moving plate 2 and the stationary plate 1, improving end face lubrication and enhancing pump reliability. It should be noted that this high-pressure oil passage is intermittently connected. Figure 5 As shown, the oil outlet 202 of the moving plate 2 intersects with the first port 101 of the lubricating oil groove 100 of the stationary plate 1, allowing lubricating oil to enter the entire lubricating oil groove 100. If they do not intersect, the oil supply is shut off. Figure 6 As shown, this ensures that the amount of oil in the lubrication groove 100 on the end face of the stationary disc 1 is appropriate, avoiding excessive oil supply that overflows into the compression chamber and affects the overall energy efficiency of the machine.

[0039] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A pump body assembly comprising opposing stationary discs (1) and moving discs (2), wherein a bearing chamber (20) is formed on the end face of the moving disc (2) away from the stationary disc (1), and further comprising a crankshaft (3), the first end of the crankshaft (3) being rotatably connected within the bearing chamber (20), characterized in that, A central oil passage (31) is formed inside the crankshaft (3) and runs through both ends thereto. A high-pressure oil supply passage (200) is formed inside the moving plate base (21) of the moving plate (2). A lubricating oil groove (100) is formed inside the stationary plate base (11) of the stationary plate (1). The opening of the lubricating oil groove (100) faces the moving plate base (21). The oil passage inlet (201) of the high-pressure oil supply passage (200) is located on the inner wall of the bearing chamber (20). The oil passage outlet (202) of the high-pressure oil supply passage (200) is intermittently connected to the first port (101) of the lubricating oil groove (100).

2. The pump body assembly of claim 1, wherein, The oil passage inlet (201) is located on the bottom wall of the bearing chamber (20).

3. The pump body assembly of claim 1, wherein, The high-pressure oil supply channel (200) also includes a connecting section extending radially along the moving plate (2), the connecting section connecting the oil channel inlet (201) and the oil channel outlet (202).

4. The pump body assembly according to claim 3, characterized in that, Throttling pins (203) are assembled within the connecting segment.

5. The pump body assembly of claim 1, wherein, The first port (101) of the lubricating oil groove (100) is an arc groove, and it is projected onto any radial plane of the stationary plate (1). The flow area of ​​the arc groove is greater than the flow area of ​​the oil passage outlet (202).

6. The pump body assembly of claim 1, wherein, The lubricating oil groove (100) extends along the curvature of the stationary vortex tooth (12) of the stationary disc (1) and is located in the outer region of the stationary vortex tooth (12).

7. The pump body assembly of claim 6, wherein, The lubricating oil groove (100) is within the movement range (300) of the moving plate base (21).

8. The pump body assembly of claim 6, wherein, The lubricating oil groove (100) extends from its first port (101) to its second port (102) and gets closer and closer to the compression cavity (400) formed between the moving disk (2) and the stationary disk (1), and is located on the periphery of the compression cavity (400).

9. The pump body assembly of claim 8, wherein, The minimum distance between the second port (102) and the compression chamber (400) is Δ, 1mm≤Δ≤3mm.

10. A scroll compressor characterized by, The pump body assembly includes any one of claims 1 to 9.

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