Pump body assembly and rotary compressor

Abstract

The application provides a pump body assembly and a rotary compressor. The pump body assembly comprises a sliding vane, a head portion in abutment with an outer circumferential surface of a roller; the head portion comprises a contact area and lubricating areas, two of which are arranged on both sides of the contact area; and a pit structure is arranged on the lubricating areas. The pit structure is arranged on the lubricating areas on both sides of the head portion of the sliding vane, the lubricating state is changed according to the dynamic pressure effect, the lubrication is changed from boundary lubrication to fluid lubrication, the friction coefficient is reduced, and power consumption is reduced.

Description

Technical Field

[0001] This application belongs to the field of rotary compressor technology, specifically relating to a pump body assembly and a rotary compressor. Background Technology

[0002] Frictional wear between friction pairs of pump body components is a common failure mode of rotary compressors, and it causes significant energy loss, resulting in a reduction in the overall energy efficiency ratio. Among these components, the vane, as a crucial friction unit in the rotary compressor, is in a boundary lubrication state with its head pressed tightly against the roller surface under the action of gas force and spring force at the tail end. This high coefficient of friction makes it the most energy-consuming component in the pump body assembly. Furthermore, due to the excessive stress caused by line contact, the vane material is highly susceptible to deformation and peeling, leading to vane wear failure and consequently affecting the compressor's performance and reliable operation. Summary of the Invention

[0003] Therefore, this application provides a pump body assembly and a rotary compressor that can solve the problems of high friction coefficient and high wear and power consumption of the vane head in the prior art.

[0004] To address the aforementioned problems, this application provides a pump body assembly, comprising:

[0005] Sliding vane, including a head that abuts against the outer peripheral surface of the roller;

[0006] The head includes a contact area and a lubrication area. There are two lubrication areas, located on both sides of the contact area. The lubrication area has a recessed structure.

[0007] Optionally, the two lubrication zones are symmetrically arranged on both sides of the contact area.

[0008] Optionally, the pit structure includes a plurality of pits evenly distributed along the axial direction of the roller.

[0009] Optionally, along the thickness direction of the slide, each of the lubrication areas has at least two layers of the recessed structure, which are arranged in parallel or intersecting directions.

[0010] Optionally, in the direction from the contact area to the side of the slide, the number of pits in the pit structure of adjacent layers is set to be the same or decreasing, and / or the diameter of the pits in the pit structure of adjacent layers is set to be the same or increasing.

[0011] Optionally, the total opening area of ​​the recess structure is 0.03 to 0.5 times the total area of ​​the lubrication zone.

[0012] Optionally, the recess is configured as one or a combination of blind hole and groove; the blind hole includes at least one of circular hole, elliptical hole, triangular hole, rhomboid hole, square hole, rectangular hole and honeycomb hole, and the groove includes at least one of grid stripe groove or spiral groove.

[0013] Optionally, the depth of the pit is set to 1–50 μm.

[0014] Optionally, the length of the recess structure along the axial direction of the roller is less than the length of the lubrication area, and each end of the recess structure is provided with a preset distance from one end of the lubrication area.

[0015] Optionally, the preset spacing is greater than or equal to 1 mm.

[0016] Optionally, the projection of the head onto the axial direction of the roller is set to an arc shape, and the central angle of the contact area is set to α, satisfying that α is greater than or equal to arcsin(e / (R)). r +R v ), where e is the eccentricity of the roller, R r R is the outer surface radius of the roller. v Let be the radius of the arc of the head.

[0017] According to another aspect of this application, a rotary compressor is provided, including the pump body assembly as described above.

[0018] This application provides a pump body assembly, including: a vane, including a head that abuts against the outer peripheral surface of a roller; the head includes a contact area and a lubrication area, the lubrication area is provided in two places, respectively located on both sides of the contact area; the lubrication area is provided with a recessed structure.

[0019] This application provides a recessed mechanism on the lubrication areas on both sides of the slide head, which changes the lubrication state according to the hydrodynamic effect, transforming from boundary lubrication to fluid lubrication, thereby reducing the coefficient of friction and lowering power consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the rotary compressor according to an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the slider and roller in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the slider structure according to an embodiment of this application;

[0023] Figure 4 This is a schematic diagram illustrating the working principle of the recess structure in an embodiment of this application;

[0024] Figure 5This is a schematic diagram of the angle of the contact area of ​​the slider head in an embodiment of this application;

[0025] Figure 6 This is a comparison diagram of the effects of the embodiments of this application and the traditional sliding plate structure;

[0026] Figure 7 This is a schematic diagram of a slider according to an embodiment of this application;

[0027] Figure 8 This is another structural schematic diagram of the slider according to an embodiment of this application;

[0028] Figure 9 This is a schematic diagram of the third structure of the slider in an embodiment of this application.

[0029] The reference numerals in the attached figures are as follows:

[0030] 01. Cylinder; 02. Slider groove; 03. Slider; 04. Spring; 05. Roller; 031. Head; 032. Lubrication area; 033. Contact area; 034. Side of slide; 035. Tail of slide; 036. Sealing area; 037. Upper and lower surfaces of slide; 038. Recess; 111. First hole row; 222. Second hole row. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] See also Figures 1 to 9 As shown, according to an embodiment of this application, a pump body assembly includes:

[0034] Sliding piece 03 includes a head 031 that abuts against the outer peripheral surface of roller 05;

[0035] The head 031 includes a contact area 033 and a lubrication area 032. There are two lubrication areas 032, which are respectively located on both sides of the contact area 033. The lubrication area 032 is provided with a pit structure.

[0036] This application provides a recess 038 mechanism on the lubrication area 032 on both sides of the head 031 of the slide 03, which changes the lubrication state according to the hydrodynamic effect, transforming from boundary lubrication to fluid lubrication, reducing the coefficient of friction and lowering power consumption.

[0037] The lubrication zone 032 primarily serves a lubrication and load-bearing function, transforming the original lubrication or even dry friction at the boundary of the slide head 031 into fluid lubrication. Due to the wedge-shaped gap formed between the slide head 031 and the surface of the roller 05, and the accompanying relative motion, the significant dynamic pressure effect of the recessed structure in the lubrication zone 032 enhances the fluid film load-bearing capacity, such as... Figure 4 The principle shown is used to balance the gas force at the tail of the slider 03 and the force of the spring 04, reduce the contact load between the head 031 and the surface of the roller 05, form a lubricating oil film, change the lubrication state, reduce the coefficient of friction, and improve the surface wear resistance.

[0038] The contact area 033 mainly serves a sealing function, ensuring that the line contact sealing strip is not damaged and preventing refrigerant from leaking along the head 031 of the slide vane between the compression chamber and the intake chamber on both sides of the slide vane 03.

[0039] In addition, the recessed structure on the lubrication zone 032 can accommodate wear debris or impurity particles, preventing continuous wear of the abrasive particles; the recessed structure can also store lubricant, which will be squeezed, carried or penetrated to the mating surface by shearing motion, playing a role in secondary lubrication.

[0040] In some embodiments, the two lubrication zones 032 are symmetrically arranged on both sides of the contact zone 033.

[0041] The two lubrication zones 032 are symmetrically arranged so that the two sides of the contact area 033 have the same function, which can avoid affecting the thickness of the sliding plate 03.

[0042] In some embodiments, the pit structure includes a plurality of pits 038 evenly distributed along the axial direction of the roller 05.

[0043] By setting rows of recesses 038 in the axial direction of the roller 05, the coefficient of friction of the entire head 031 in the axial direction can be improved, thereby reducing the overall power consumption.

[0044] In some embodiments, along the thickness direction of the slide plate 03, each of the lubrication areas 032 has at least two layers of the recess structure, which are arranged in parallel or intersecting directions.

[0045] The multi-layered pit structure is equivalent to having multiple rows of pits 038 along the axial direction of the roller 05. This can further improve the fluid film bearing capacity, balance the gas pressure at the tail of the slide 03 and the force of the spring 04, reduce the contact load between the head 031 and the surface of the roller 05, form a lubricating oil film, and improve the surface wear resistance.

[0046] In some embodiments, in the direction from the contact area 033 toward the side of the slide 03, the number of pits 038 in the pit structures of adjacent layers is set to be the same or decreasing, and / or, the diameter of pits 038 in the pit structures of adjacent layers is set to be the same or increasing.

[0047] The fluid enters the contact area 033 from the side of the slide 03 and needs to pass through a multi-layered pit structure. Due to the different number and size of pits 038 in adjacent pit structures, the arrangement of pits 038 presents a variable density distribution, which is conducive to forming a convergent shape from both sides of the slide 03 towards the middle, further improving the fluid dynamic pressure bearing capacity.

[0048] In some embodiments, the ratio of the total opening area of ​​the recess structure to the total area of ​​the lubrication zone 032 is 0.03 to 0.5. Preferably, the ratio is set to 0.05.

[0049] Limiting the total area of ​​the recessed structure can reduce the coefficient of friction, improve surface wear resistance, and prevent material deformation.

[0050] In some embodiments, the recess 038 is one or a combination of a blind hole and a groove; the blind hole includes at least one of a circular hole, an elliptical hole, a triangular hole, a rhomboid hole, a square hole, a rectangular hole, and a honeycomb hole, and the groove includes at least one of a grid stripe groove or a spiral groove. Preferably, the depth of the recess 038 is set to 1 to 50 μm, more preferably, the depth is set to 10 μm.

[0051] The 038 recess features a diverse structure that can be selected based on specific needs, making it easier to achieve variable density distribution and enhancing hydrodynamic bearing capacity. The depth of the 038 recess facilitates the containment of lubricating oil and particulate matter, reducing wear.

[0052] For the pit 038 of the blind hole structure, if it is a round hole, a microporous structure with a diameter of 10 to 1000 μm can be used.

[0053] In some embodiments, the length of the recess structure along the axial direction of the roller 05 is less than the length of the lubrication area 032, and each end of the recess structure is provided with a preset distance from one end of the lubrication area 032. Optionally, the preset distance is greater than or equal to 1 mm.

[0054] The part of the head 031 near the upper and lower ends of the slider 03 does not have a recessed structure, forming a complete arc surface. This is to avoid the recessed structure from causing leakage to the upper and lower end surfaces. This is equivalent to sealing and isolating the recessed structure from the upper and lower end surfaces.

[0055] In some embodiments, the projection of the head 031 onto the axial direction of the roller 05 is arc-shaped, and the central angle of the contact area 033 is set to α, satisfying that α is greater than or equal to arcsin(e / (R)). r +R v ), where e is the eccentricity of the roller 05, R r R is the outer surface radius of the roller 05. v The radius of the arc of the head 031.

[0056] The contact area 033 is mainly for sealing and sliding contact with the outer peripheral surface of the roller 05. In the traditional line contact method, peeling is prone to occur due to excessive stress, resulting in wear. This application limits the width of the contact area 033, increases the contact surface between the contact area 033 and the roller 05, reduces stress, and thus makes peeling less likely to occur.

[0057] According to another aspect of this application, a rotary compressor is provided, including the pump body assembly as described above.

[0058] The vane 03 of the rotary compressor is installed in the vane groove 02 and reciprocates. Under the action of the spring force of the tail spring 04 and the gas force of the refrigerant, the head 031 of the vane 03 is in close contact with the roller 05, and they move relative to each other, thus dividing the working chamber of the cylinder 01 into a compression chamber and a suction chamber.

[0059] The head 031 of the slide 03 includes two lubrication areas 032 and one contact area 033. The two lubrication areas 032 are respectively close to the two ends of the slide side 034. The contact area 033 is located in the middle of the two lubrication areas 032. Lubrication pits 038 are added in the lubrication areas 032. The two lubrication areas 032 are symmetrically distributed with respect to the contact area 033.

[0060] Each lubrication zone 032 has a pit 038 that includes at least one of the first hole row 111, the second hole row 222, or other hole rows. The first hole row 111 is close to the boundary of the contact area, and the second hole row 222 and other hole rows are arranged sequentially in the direction away from the boundary area. Adjacent hole rows are distributed in parallel or staggered manner.

[0061] The lubrication zone 032 primarily serves a lubrication and load-bearing function, transforming the original lubrication or even dry friction at the boundary of the slide head 031 into fluid lubrication. Due to the wedge-shaped gap formed between the slide head 031 and the roller surface 05, and the accompanying relative motion, the significant dynamic pressure effect of the lubrication zone's recessed structure 038 enhances the fluid film's load-bearing capacity. This balances the gas and spring forces at the slide tail 035, reduces the contact load between the head 031 and the roller surface 05, forms a lubricating oil film, alters the lubrication state, reduces the coefficient of friction, and improves surface wear resistance.

[0062] The contact area 033 mainly serves a sealing function, ensuring that the line contact sealing strip is not damaged and preventing refrigerant from leaking along the slide head 031 between the compression chamber and the intake chamber on both sides of the slide vane 03.

[0063] The fluid enters the contact area 033 from the side of the slider 034 and passes through the second hole row 222 and the first hole row 111 in sequence. Since the number of pits in the second hole row 222 is less than that in the first hole row, and the pit diameter is larger than that in the second hole row, the variable density pit distribution is conducive to forming a convergent shape along both sides of the slider towards the middle, further improving the fluid dynamic pressure bearing capacity.

[0064] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above description is merely a preferred embodiment of this application. 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 application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A pump body assembly, characterized in that, include: The slide (03) includes a head (031) that abuts against the outer peripheral surface of the roller (05); The head (031) includes a contact area (033) and a lubrication area (032). There are two lubrication areas (032), which are respectively located on both sides of the contact area (033). The lubrication area (032) is provided with a pit structure. The pit structure includes a plurality of pits (038) evenly distributed along the axial direction of the roller (05); Along the thickness direction of the slide (03), each of the lubrication areas (032) has at least two layers of the recess structure, which are arranged in parallel or intersecting directions; In the direction from the contact area (033) toward the side of the slide (03), the number of pits (038) in the pit structure of adjacent two layers is set to be the same or decreasing, and / or the diameter of the pits (038) in the pit structure of adjacent two layers is set to be the same or increasing.

2. The pump body assembly according to claim 1, characterized in that, The two lubrication zones (032) are symmetrically arranged on both sides of the contact zone (033).

3. The pump body assembly according to claim 1, characterized in that, The total opening area of ​​the recess structure is 0.03 to 0.5 times the total area of ​​the lubrication zone (032) in which it is located.

4. The pump body assembly according to claim 3, characterized in that, The recess (038) is configured as one or a combination of blind hole and groove; the blind hole includes at least one of circular hole, elliptical hole, triangular hole, rhomboid hole, square hole, rectangular hole and honeycomb hole, and the groove includes at least one of grid stripe groove or spiral groove.

5. The pump body assembly according to claim 4, characterized in that, The depth of the pit (038) is set to 1-50 μm.

6. The pump body assembly according to claim 1, characterized in that, Along the axial direction of the roller (05), the length of the recess structure is less than the length of the lubrication area (032), and each end of the recess structure is provided with a preset distance from one end of the lubrication area (032).

7. The pump body assembly according to claim 6, characterized in that, The preset spacing is greater than or equal to 1 mm.

8. The pump body assembly according to claim 2, characterized in that, The projection of the head (031) onto the axial direction of the roller (05) is set to an arc shape, and the central angle of the contact area (033) is set to α, satisfying that α is greater than or equal to arcsin(e / (R)). r +R v ), where e is the eccentricity of the roller (05), R r R is the outer surface radius of the roller (05). v The radius of the arc of the head (031).

9. A rotary compressor, characterized in that, Includes the pump body assembly as described in any one of claims 1-8.

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