Compressor seal structure and rotary compressor

Abstract

The utility model relates to a compressor technical field, specifically disclose a kind of compressor sealing structure and rotor compressor, wherein, crankshaft has eccentric part, piston is set in eccentric part, and is arranged in cylinder and rolls, at least one protruding part is equipped on eccentric part, surface texture is introduced by the sealing interface formed by the cooperation of the end face of piston and protruding part, when compressor actual operation, surface texture can store lubricating oil, and form stable lubricating film, reduce boundary lubrication or dry friction state, to reduce friction coefficient, reduce friction loss, improve the sealing performance of compressor, improve the overall efficiency and performance of compressor, and surface texture will produce additional fluid dynamic pressure effect when relative motion, improve oil film bearing capacity, reduce direct contact wear, at the same time, improve the adaptability of compressor, under the synergistic effect of surface texture and compressor dynamic sealing structure, effectively play lubricating and sealing effect, ensure the reliability of compressor operation.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor sealing structure and a rotary compressor. Background Technology

[0002] In actual operation, the piston of a rotary compressor rotates under the drive of the eccentric part of the crankshaft. It mainly relies on the tight fit between the protrusion of the eccentric part of the crankshaft and the piston end face to seal the exhaust port. However, when the crankshaft rotates at high speed, the direct contact between the sealing structure and the cylinder head is prone to generating large friction, resulting in a significant increase in friction loss and thus reducing the overall efficiency of the compressor. In addition, under low-load operation, the contact pressure between the sealing structure and the cylinder head will be significantly reduced, which can easily lead to poor sealing. This not only affects the low-speed performance of the compressor, but may also cause gas leakage, further reducing its working efficiency.

[0003] Therefore, there is an urgent need for a compressor sealing structure and a rotary compressor to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a compressor sealing structure and a rotary compressor, which can effectively improve the sealing performance of the compressor, reduce friction loss, and improve its overall efficiency and performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, this utility model provides a compressor sealing structure, including: a cylinder head, a crankshaft, a piston and a cylinder. The cylinder head has an exhaust port, the crankshaft has an eccentric portion, the piston is sleeved on the eccentric portion and rolled inside the cylinder, the eccentric portion has at least one protrusion, the protrusion and the end face of the piston cooperate to form a sealing interface to seal the exhaust port, and the sealing interface has a surface texture.

[0007] As a preferred technical solution for the above-mentioned compressor sealing structure, the surface texture is provided on the end face of the piston and / or the surface of the protrusion.

[0008] As a preferred technical solution for the above-mentioned compressor sealing structure, when the surface texture is provided on both the end face of the piston and the protrusion, the texture shapes of the two complement each other.

[0009] As a preferred technical solution of the above-mentioned compressor sealing structure, the surface texture includes a plurality of arrayed groove units, wherein the groove units are rhomboid and / or honeycomb shaped.

[0010] As a preferred technical solution of the above-mentioned compressor sealing structure, the surface of the surface texture is coated with a first treatment layer, which is made of a wear-resistant material.

[0011] As a preferred technical solution for the above-mentioned compressor sealing structure, the first treatment layer is a graphene nano-ceramic coating.

[0012] As a preferred technical solution of the above-mentioned compressor sealing structure, the surface texture is coated with a second treatment layer, which is a hardened layer containing at least carbon and nitrogen elements formed by ion implantation technology.

[0013] As a preferred technical solution for the above-mentioned compressor sealing structure, the surface texture is a micro-nano structure texture.

[0014] As a preferred technical solution for the above-mentioned compressor sealing structure, the surface texture is formed by laser processing.

[0015] On the other hand, this utility model also provides a rotary compressor, including a drive mechanism and a compressor sealing structure in any of the above-mentioned solutions. The drive mechanism is tractively connected to the crankshaft and can drive the crankshaft to rotate.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model provides a compressor sealing structure and a rotary compressor. The compressor sealing structure includes: a cylinder head, a crankshaft, a piston and a cylinder. The cylinder head has an exhaust hole. The crankshaft has an eccentric part. The piston is sleeved on the eccentric part and rolled inside the cylinder. The eccentric part has at least one protrusion. The protrusion and the end face of the piston cooperate to form a sealing interface to dynamically seal the exhaust hole. The sealing interface has a surface texture. This design introduces surface texture into the sealing interface formed by the piston end face and the protrusion. During actual compressor operation, the surface texture (including micro-pits, grooves, etc.) can store lubricating oil and further form a more stable lubricating film, reducing boundary lubrication or dry friction, thereby reducing the coefficient of friction and friction loss. This effectively improves the compressor's sealing performance, enhances the overall efficiency and performance of the compressor, and generates additional hydrodynamic pressure effect during relative movement, increasing the oil film's load-bearing capacity and further reducing direct contact wear. It also reduces the contact area between the oil film and the cylinder head, while improving the compressor's adaptability. Under the synergistic effect of the surface texture and the compressor's dynamic sealing structure, it can effectively perform lubrication and sealing functions, ensuring the stability and reliability of the compressor's operation. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the cylinder provided by this utility model;

[0019] Figure 2 Structural schematic diagram of the surface texture provided by this utility model Figure 1 ;

[0020] Figure 3 Structural schematic diagram of the surface texture provided by this utility model Figure 2 .

[0021] in:

[0022] 100, Piston; 200, Cylinder; 300, Exhaust port; 400, Protrusion; 500, Groove unit. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figures 1 to 3 As shown, this embodiment provides a compressor sealing structure, which includes: a cylinder head, a crankshaft, a piston 100 and a cylinder 200. The cylinder head has an exhaust port 300. The crankshaft has an eccentric part. The piston 100 is sleeved on the eccentric part and rolled inside the cylinder 200. The eccentric part has at least one protrusion 400. The protrusion 400 and the end face of the piston 100 cooperate to form a sealing interface to dynamically seal the exhaust port 300. The sealing interface has a surface texture. This design introduces a surface texture at the sealing interface formed by the mating of the piston 100 end face and the protrusion 400. During actual compressor operation, the surface texture (including micro-pits, grooves, etc.) can store lubricating oil, further forming a more stable lubricating film. This reduces boundary lubrication or dry friction, thereby lowering the coefficient of friction and reducing friction loss. This effectively improves the compressor's sealing performance, enhances the overall efficiency and performance of the compressor, and generates additional hydrodynamic pressure during relative motion. This enhances the oil film's load-bearing capacity, further reduces direct contact wear, and decreases the contact area between the surface texture and the cylinder head. Simultaneously, it improves the compressor's adaptability. Under the synergistic effect of the surface texture and the compressor's dynamic sealing structure, it effectively performs lubrication and sealing functions, ensuring the stability and reliability of the compressor's operation.

[0029] In this embodiment, the surface texture is provided on the end face of the piston 100 and / or the surface of the protrusion 400, and the surface texture is a micro-nano structure texture.

[0030] Optionally, when surface textures are simultaneously provided on both the end face of the piston 100 and the protrusion 400, their texture shapes complement each other. This arrangement achieves a synergistic lubrication effect, avoids local interruption of the oil film, reduces the boundary lubrication area, achieves uniformity of the lubricating oil film, and further optimizes sealing performance. At the same time, the complementary texture shapes make the contact stress distribution more uniform, avoiding seal failure caused by local overload.

[0031] Optionally, the surface texture includes multiple arrayed groove units 500, which are rhomboid and / or honeycomb-shaped. Of course, in other embodiments, the specific shape of the groove units 500 can be set according to actual needs, and no further limitations are made here. This arrangement, with its regular arrangement of rhomboid and honeycomb textures, allows for a more uniform distribution of lubricating oil on the contact surface, further guiding the lubricating oil to form a stable oil film, optimizing oil film distribution and load-bearing capacity, preventing oil film rupture or unevenness leading to localized wear, and improving the load-bearing capacity of the sealing structure. Simultaneously, the rhomboid and honeycomb textures exhibit better thermal stability under high-temperature conditions, and the regularly arranged geometry effectively reduces thermal deformation, improving the stability and reliability of the sealing structure to maintain good sealing performance.

[0032] It should be noted that, for compressors operating under low load conditions, the contact pressure between the sealing structure and the cylinder head will be significantly reduced. The regularly arranged diamond and honeycomb textures can form a stable oil film at low speeds and provide a uniform pressure distribution, avoiding local seal failure. While reducing friction and wear, it ensures sealing performance during low-speed operation, thereby improving the reliability and performance of the compressor.

[0033] Specifically, this embodiment exemplarily provides the following technical solution: using laser processing technology to form rhomboid pits with a side length of 1μm-3μm and a depth of 0.5μm-2μm, or honeycomb-shaped pits with an outer circle diameter of 1μm-3μm and a depth of 0.5μm-2μm, at the sealing interface. These pits can store lubricating oil and better guide its flow, ensuring the formation of an effective and stable lubricating oil film between the sealing structure and the cylinder head under different operating conditions, thereby reducing direct contact between them.

[0034] In this embodiment, to further enhance sealing performance and wear resistance, the surface of the sealing interface with surface texture can undergo special surface treatment. Specifically, a first treatment layer is coated on its surface, which is made of a special material with good wear resistance and a low coefficient of friction. Further, to enhance the surface's wear resistance and self-lubricating properties, the first treatment layer is a graphene nano-ceramic coating; alternatively, ion implantation technology is used to implant elements such as carbon and nitrogen into the surface, thereby forming a hardened layer with a depth of 0.1 μm-0.5 μm to improve surface hardness and wear resistance.

[0035] This embodiment also provides a rotary compressor, including a drive mechanism and the compressor sealing structure described above. The drive mechanism is drively connected to the crankshaft and can drive the crankshaft to rotate. Further, the drive mechanism includes a stator and a rotor. The stator is spaced around the outer periphery of the rotor and can drive the rotor to rotate. The crankshaft is fixedly connected to the rotor.

[0036] The surface texture, surface treatment structure, and compressor sealing structure (including components such as cylinder head, crankshaft, piston 100, and cylinder 200) of the rotary compressor provided in this embodiment work together. During the actual operation of the compressor, when the piston 100 and the protrusion 400 dynamically seal the exhaust port 300, the surface texture and its treated surface work together to further reduce the risk of leakage, improve the sealing performance, and at the same time reduce the friction between components, ensuring the stable operation of the entire sealing structure.

[0037] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A compressor sealing structure, characterized in that, include: The cylinder head, crankshaft, piston (100), and cylinder (200) are provided. The cylinder head has an exhaust port (300). The crankshaft has an eccentric portion. The piston (100) is fitted onto the eccentric portion and is rolled within the cylinder (200). The eccentric portion has at least one protrusion (400). The protrusion (400) and the end face of the piston (100) cooperate to form a sealing interface to seal the exhaust port (300). The sealing interface has a surface texture.

2. The compressor sealing structure according to claim 1, characterized in that, The surface texture is provided on the end face of the piston (100) and / or the surface of the protrusion (400).

3. The compressor sealing structure according to claim 2, characterized in that, When the surface texture is provided on both the end face of the piston (100) and the protrusion (400), the texture shapes of the two are complementary.

4. The compressor sealing structure according to claim 1, characterized in that, The surface texture includes a plurality of arrayed groove units (500), which are rhomboid and / or honeycomb shaped.

5. The compressor sealing structure according to claim 4, characterized in that, The surface texture is coated with a first treatment layer, which is made of a wear-resistant material.

6. The compressor sealing structure according to claim 5, characterized in that, The first processing layer is a graphene nano-ceramic coating.

7. The compressor sealing structure according to claim 4, characterized in that, The surface texture is coated with a second treatment layer, which is a hardened layer consisting of at least carbon and nitrogen elements formed by ion implantation technology.

8. The compressor sealing structure according to any one of claims 1-7, characterized in that, The surface texture is a micro / nano structure texture.

9. The compressor sealing structure according to any one of claims 1-7, characterized in that, The surface texture is formed by laser processing.

10. A rotary compressor, characterized in that, It includes a drive mechanism and a compressor sealing structure as described in any one of claims 1-9, wherein the drive mechanism is tractively connected to the crankshaft and is capable of driving the crankshaft to rotate.

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