Wear-resistant blade structure of compressor

Abstract

The utility model relates to a compressor wear-resistant blade structure, which comprises a wear-resistant hardened layer, a reinforced wear-resistant hard coating and an oil storage lubrication type soft coating, the wear-resistant hardened layer covers the surface of the whole blade, the reinforced wear-resistant hard coating covers the wear-resistant hardened layer of the blade R part, and the oil storage lubrication type soft coating covers the wear-resistant hardened layer of the blade R part. And the oil storage lubrication type soft coating covers the wear-resistant hardened layer on the other surfaces of the blade. Compared with the prior art, the wear resistance and the service life of the blade under complex working conditions are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotor compressor technical field relates to a kind of compressor wear-resistant vane structure. BACKGROUND

[0002] In the working process of the rotor compressor, the vane needs to be in contact with the piston, cylinder and other components continuously and moves relatively. Under this working condition, the vane faces problems such as wear and tear and insufficient lubrication performance. A good coating can improve the wear resistance and surface lubricity of the vane, thereby prolonging the service life of the vane and improving the overall performance and reliability of the compressor.

[0003] Currently, the vane used in the rotor compressor is a stainless steel nitrided vane, a high-speed steel non-nitrided vane or a high-speed steel nitrided vane. To improve the reliability of the compressor, a diamond-like carbon (DLC) coating can also be applied to the surface of the vane. For example, patent WO9721033A1 discloses a rotary compressor with reduced lubrication sensitivity, in which a DLC coating is added to the vane, particularly to the tip or nose of the vane that is in contact with the piston. The DLC coating has excellent wear resistance and low friction coefficient, but the high cost of equipment and process makes the expensive DLC coating a significant problem, which limits its application in cost-sensitive manufacturing industries. Therefore, a new type of coating with high cost performance is needed.

[0004] To reduce the cost of the vane coating, a new type of coating is sought to replace the DLC coating. First, consider using stainless steel nitrided vanes directly. The surface hardness and wear resistance of the vane can be significantly improved through nitriding treatment. However, in actual application, the variable frequency large machine has too large a load, and the vane and the cylinder, which is the counter-abrasive part, are pulled apart, which means that the scheme of directly canceling the DLC coating and using stainless steel nitrided vanes does not work.

[0005] Coating a manganese phosphate film layer on the surface of the vane can significantly improve the lubrication performance and wear resistance of the vane, and can significantly reduce wear and tear and sintering seizure. Coating a manganese phosphate film on the surface of the vane can isolate direct abrasion between metals.

[0006] However, after applying it to the variable frequency large machine, the R part coating of the vane coated with a manganese phosphate film is polished, and the coating condition of the large plane is good. The polishing of the R part coating of the vane indicates that the phosphating coating cannot support the long-term wear and tear between the piston and the R part of the vane. The R part of the vane and the piston are in line contact, and in the case of a larger crankshaft eccentricity, the vane has a larger extension, and the stress condition between the R part of the vane and the piston is more severe, thereby causing the manganese phosphate film coating on the surface of the R part of the vane to be worn.

[0007] Patent CN102321887A discloses a kind of composite surface modified 38CrMoAl compressor blade and its preparation process, wherein blade uses 38CrMoAl as the base material of compressor blade, after being quenched and tempered heat treatment and using surface short-time nitriding chemical heat treatment, then a layer of graphite-like (GLC) film is deposited on the nitriding layer at the blade where rolling contact with eccentric rotor (R face). Although the patent carries out protection treatment on the R face of blade, other parts of the blade lack targeted protection, and it is difficult to meet the comprehensive protection needs under complex working conditions.

[0008] Patent JP2002005063A discloses a rotary compressor, wherein a solid lubricating material containing at least one compound selected from MoS2, graphite and polytetrafluoroethylene (PTFE) is fixed to at least one of the surface-treated blade and the opposite sliding member to form a soft coating. However, the patent only uses a soft coating, lacks comprehensive improvement of the hardness of the blade surface and overall wear resistance, and the aforementioned soft coating has relatively limited wear resistance. In a compressor that operates at high speed for a long time, it may not be able to meet the high wear resistance requirements between the blade and the opposite sliding member, which can easily lead to increased wear, affecting the working efficiency and service life of the compressor.

[0009] Patent CN101482119A discloses a scroll compressor, wherein a carbon steel material or a cast material for mechanical structure is subjected to nitriding treatment to harden, and then subjected to molybdenum disulfide and manganese phosphate coating treatment. However, the surface treatment method used in the patent lacks differentiated design according to the functional requirements and wear characteristics of different component positions, and lacks strengthening treatment of local key wear areas.

[0010] Therefore, there is an urgent need for a new type of coating that can comprehensively solve the problem of blade wear and has high cost performance. Utility model content

[0011] The utility model discloses a kind of compressor wear-resistant blade structures to overcome at least one of the defects existing in the prior art, and the utility model improves the wear resistance and service life of blade under complex working conditions.

[0012] The purpose of the utility model can be realized by the following technical solutions:

[0013] One of the technical solutions of the utility model is to provide a compressor wear-resistant blade structure, which comprises a wear-resistant hardening layer, a reinforced wear-resistant hard coating and an oil storage lubricating soft coating. The wear-resistant hardening layer covers the surface of the entire blade. The reinforced wear-resistant hard coating covers the wear-resistant hardening layer on the R portion of the blade. The oil storage lubricating soft coating covers the wear-resistant hardening layer on the remaining surface of the blade.

[0014] Further, the wear-resistant hardening layer adopts a nitriding layer, and the whole blade is subjected to nitriding treatment to form the nitriding layer, and the first wear-resistant hardening layer forms a basic wear-resistant barrier for the blade to resist general friction.

[0015] Further, the thickness of the wear-resistant hardening layer is 20-80 μm.

[0016] Further, the R part of the blade is a radius of curvature change area, and the R part and the piston are in linear contact, and the bearing capacity is large, in the case of larger eccentricity of the crankshaft, the blade extends more, and the stress condition between the R part of the blade and the piston is more severe.

[0017] Further, the reinforced wear-resistant hard coating adopts a diamond-like carbon (DLC) coating, and the R part of the blade is subjected to vapor deposition treatment to form a diamond-like carbon coating, and the second reinforced wear-resistant hard coating plays a role in the key area subjected to large stress and friction, the high hardness of the reinforced wear-resistant hard coating ensures the structural integrity, and the low friction coefficient reduces the energy loss and the wear degree.

[0018] Further, the thickness of the reinforced wear-resistant hard coating is 1-5 μm.

[0019] Further, the large plane of the blade is a plane with wide side surface, the large plane is in contact with the cylinder blade groove surface, the side surface of the blade is a plane with narrow side surface, the side surface is in contact with the large plane of the upper and lower cylinder head, and the tail part of the blade is provided with a spring groove on the large plane, and the spring groove is in contact with the spring.

[0020] Further, the oil storage and lubrication type soft coating adopts a phosphating coating, and the large plane, the side surface and the tail part of the blade are subjected to phosphating treatment to form a phosphating coating, and the third oil storage and lubrication type soft coating further reduces the friction coefficient of the large plane, the side surface and the tail part of the blade through the oil storage and lubrication mechanism, the oil storage and lubrication type soft coating has porosity, can increase the storage amount of lubricating oil on the blade surface, thereby improving the lubricating performance, and when encountering a small impact, the oil storage and lubrication type soft coating can absorb and disperse energy, and cooperate with the first wear-resistant hardening layer, so that the blade can maintain good wear resistance and stable working state under various working conditions, and the wear problem of the blade and the cylinder blade groove can be solved; specifically, the blade is soaked in a solution containing manganese salt, phosphate and other additives, by controlling process parameters such as treatment time, temperature and pH value, chemical and electrochemical reactions can be caused between the iron element on the surface of the blade and the manganese salt and the phosphate in the solution, to generate a manganese iron phosphate compound (manganese phosphating particles), and these manganese particles are deposited on the surface of the blade and gradually form a uniform manganese phosphating layer, the phosphating coating is firmly combined with the blade, and the wear resistance of the surface of the blade can be greatly improved.

[0021] Further, the thickness of the oil storage lubrication type soft coating is 1-5 microns.

[0022] Further, the surface manganese particle size of the oil storage lubrication type soft coating is 1-5 microns.

[0023] As a preferred technical solution, the material of the blade is stainless steel or high-speed steel.

[0024] As a preferred technical solution, the material of the blade is 11Cr17 stainless steel or W6Mo5Cr4V2 high-speed steel.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] (1) The wear-resistant blade structure of the utility model is composed of three layers of different functional coatings, and the wear-resistant hardening layer, the blade R part reinforced wear-resistant hard coating and the oil storage lubrication type soft coating on the rest of the blade are combined and designed according to the distribution position and mutual cooperation relationship of the unique three-layer structure on the blade, so that a comprehensive and targeted wear-resistant system is formed, the service life is prolonged, the cost is reduced relative to the overall coating of the blade diamond-like carbon coating, and it is especially suitable for complex working conditions with larger crankshaft eccentricity, larger blade extension and more severe stress between the blade R part and the piston.

[0027] (2) The first layer in the utility model is a wear-resistant hardening layer covering the whole blade, and the surface hardness of the blade is greatly improved through nitriding treatment, so that the basic wear resistance is ensured and the overall wear resistance is enhanced.

[0028] (3) The second layer in the utility model is a reinforced wear-resistant hard coating for the blade R part (the area with changing radius of curvature), and a diamond-like carbon coating is formed by gas phase deposition treatment, which has the characteristics of high hardness and low friction coefficient, and is specially strengthened for the key area, so that the wear resistance and fatigue resistance of the key part of the blade can be effectively strengthened.

[0029] (4) The third layer in the utility model is an oil storage lubrication type soft coating on the rest of the blade, and a phosphating film with a microporous structure is formed by phosphating treatment, which can store lubricating oil and continuously provide lubrication during the operation of the blade, and cooperates with the overall hardening layer to reduce friction and wear. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 It is a front view structural schematic diagram of the blade in the embodiment of the utility model;

[0031] Fig. 2 It is a top view structural schematic diagram of the blade in the embodiment of the utility model;

[0032] Fig. 3 It is a right view structural schematic diagram of the blade in the embodiment of the utility model.

[0033] Marked in the figure:

[0034] 1 - R part, 2 - large plane, 3 - side, 4 - tail. DETAILED DESCRIPTION

[0035] The utility model will be described in detail below in combination with specific embodiments. The embodiments are implemented on the premise of the technical scheme of the utility model, and detailed implementation modes and specific operation processes are given, but the protection scope of the utility model is not limited to the following embodiments.

[0036] In the description of the utility model, it should be explained that the directions or position relations indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, and only mean different instances of the same object, and do not mean that the objects thus described must be arranged in a given order, whether in time, space, order or any other way.

[0037] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] Embodiment:

[0039] A kind of compressor wear-resistant vane structure, as shown in Figs. 1 to 3 It includes wear-resistant hardening layer, reinforced wear-resistant hard coating and oil storage lubrication type soft coating, wear-resistant hardening layer covers on the surface of vane whole, reinforced wear-resistant hard coating covers on the wear-resistant hardening layer of vane R part 1, oil storage lubrication type soft coating covers on the wear-resistant hardening layer of vane remaining surface;

[0040] Wear-resistant hardening layer selects nitriding layer, after vane whole is treated by nitriding, nitriding layer is formed, first layer wear-resistant hardening layer constructs the basic wear-resistant barrier of vane, and resists general friction;

[0041] The R part 1 of the vane is a radius of curvature changing area, and the line contact between the R part 1 and the piston has a large bearing capacity. In the case of a larger crankshaft eccentricity, the vane has a larger extension, and the stress condition between the R part 1 of the vane and the piston is more severe;

[0042] The strengthened wear-resistant hard coating is selected as a diamond-like carbon (DLC) coating. The R part 1 of the vane is treated by vapor deposition to form a diamond-like carbon coating. The second layer of strengthened wear-resistant hard coating plays a role in the key area that bears a large stress and friction. The high hardness of the diamond-like carbon coating ensures the structural integrity, and the low friction coefficient reduces the energy loss and the degree of wear.

[0043] The large plane 2 of the vane is a plane with a wide side surface. The large plane 2 is in contact with the cylinder vane groove surface. The side surface 3 of the vane is a plane with a narrow side surface. The side surface 3 is in contact with the upper and lower cylinder head large planes. The tail part 4 of the vane is provided with spring grooves on the large plane 2. In this embodiment, two V-shaped spring grooves are preferred. The spring grooves are in contact with the springs.

[0044] The oil storage lubrication type soft coating is selected as a phosphating coating. The large plane 2, the side surface 3 and the tail part 4 of the vane are treated by phosphating to form a phosphating coating. The third layer of oil storage lubrication type soft coating further reduces the friction coefficient of the large plane 2, the side surface 3 and the tail part 4 of the vane through the oil storage lubrication mechanism. The phosphating coating has porosity, which can increase the storage amount of lubricating oil on the vane surface, thereby improving the lubrication performance. When a small impact is encountered, the soft phosphating coating can absorb and disperse energy. In cooperation with the first layer of wear-resistant hardening layer, the vane can maintain good wear resistance and stable working condition under various working conditions, and can solve the wear problem of the vane and the cylinder vane groove. Specifically, the vane is soaked in a solution containing manganese salt, phosphate and other additives. By controlling process parameters such as treatment time, temperature and pH value, chemical and electrochemical reactions can be induced between the iron elements on the surface of the vane and the manganese salt and the phosphate in the solution to generate manganese iron phosphate composite (manganese phosphating particles). These manganese particles are deposited on the surface of the vane and gradually form a uniform manganese phosphating layer. The phosphating coating is firmly combined with the vane, which can greatly improve the wear resistance of the vane surface.

[0045] In this embodiment, the material of the vane is selected as 11Cr17 stainless steel.

[0046] The average thickness of the first layer of wear-resistant hardening layer is 60 μm.

[0047] The average thickness of the second layer of strengthened wear-resistant hard coating is 3.74 μm.

[0048] The average thickness of the third layer of oil storage lubrication type soft coating is 2.34 μm, and the average size of the surface manganese particles is 2.62 μm.

[0049] By implementing the special wear-resistant structure coating on the surface of the blade, both the use requirement of the compressor blade and the cost reduction requirement are met. Through the bench test examination, the multi-layer coating structure wear-resistant blade can meet the use requirement of the rotary compressor.

[0050] The foregoing description of the embodiments is for the purpose of enabling a person with ordinary skill in the art to understand and use the utility model. Those skilled in the art can obviously make various modifications to these embodiments, and apply the general principles described herein to other embodiments without having to undergo creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A wear-resistant blade structure for a compressor, characterized in that, The structure includes a wear-resistant hardened layer, a reinforced wear-resistant hard coating, and an oil-storing lubricating soft coating. The wear-resistant hardened layer covers the entire surface of the blade, the reinforced wear-resistant hard coating covers the wear-resistant hardened layer on the R part (1) of the blade, and the oil-storing lubricating soft coating covers the wear-resistant hardened layer on the remaining surfaces of the blade.

2. The wear-resistant blade structure for a compressor according to claim 1, characterized in that, The wear-resistant hardening layer is a nitrided layer, which is formed after the entire blade is nitrided.

3. The wear-resistant blade structure for a compressor according to claim 2, characterized in that, The thickness of the wear-resistant hardened layer is 20-80 μm.

4. The wear-resistant blade structure for a compressor according to claim 1, characterized in that, The R-section (1) of the blade is the region where the radius of curvature changes, and the R-section (1) is in line contact with the piston.

5. The wear-resistant blade structure for a compressor according to claim 4, characterized in that, The enhanced wear-resistant hard coating adopts a diamond-like carbon coating, which is formed on the R part (1) of the blade after vapor deposition treatment.

6. The wear-resistant blade structure for a compressor according to claim 5, characterized in that, The thickness of the reinforced wear-resistant hard coating is 1-5 μm.

7. The wear-resistant blade structure for a compressor according to claim 1, characterized in that, The large plane (2) of the blade is a plane with a wide side surface. The large plane (2) is in contact with the cylinder blade groove surface. The side surface (3) of the blade is a plane with a narrow side surface. The side surface (3) is in contact with the large plane of the upper and lower cylinder heads. The tail (4) of the blade has a spring groove on the large plane (2). The spring groove is in contact with the spring.

8. The wear-resistant blade structure for a compressor according to claim 7, characterized in that, The oil-lubricating soft coating is a phosphate coating, which is formed by phosphate treatment of the large plane (2), side (3) and tail (4) of the blade.

9. A compressor wear-resistant blade structure according to claim 8, characterized in that, The thickness of the oil-storing and lubricating soft coating is 1-5 μm.

10. A compressor wear-resistant blade structure according to claim 9, characterized in that, The surface manganese particles of the oil-storing and lubricating soft coating have a size of 1-5 μm.

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