Crankshaft structure and compressor thereof

Abstract

The crankshaft structure comprises a shaft part, the shaft part is provided with an oil way and a plurality of oil outlet holes, the multiple oil outlet holes communicate with the oil way, and the oil way is arranged to convey lubricating oil; the oil way extends in the axial direction of the shaft part, and the oil outlet hole extends in the radial direction of the shaft part. An oleophobic structure is arranged on the inner wall of the oil way, so that lubricating oil flows on the surface of the oleophobic structure. An oleophobic structure is utilized in the crankshaft structure, an oil way with super oleophobic performance is formed, the flow resistance generated by the kinematic viscosity of lubricating oil is remarkably reduced, the circulation amount of the lubricating oil is improved, and the operation problem of the compressor in an oil-lacking state is solved. And along with the development of the compressor in the miniaturization and high-speed direction, the area of an internal oil path of the compressor is limited, and the compressor can enter a high-speed running state more quickly by improving the circulation amount of lubricating oil, so that the pre-lubricating time during starting is shortened, the risk of wear failure is reduced, the service life is prolonged, and the running reliability is improved.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a crankshaft structure and a compressor thereof. Background Art

[0002] In the current household air-conditioning industry, the compressor is the core component of the refrigeration system, and its performance and efficiency are directly related to the overall performance of the air conditioner. The compressor completes the refrigeration cycle by compressing the gaseous refrigerant. Among them, the pump body parts that perform the compression function move relative to each other at an extremely high frequency, which makes the friction and wear conditions of the various parts in the pump body extremely severe, and has an adverse effect on the noise and power consumption during the operation of the compressor. In the long-term use of the compressor, the long-term relative friction between the various parts may even cause material loss and lead to failure, which seriously affects the operating reliability and service life of the compressor.

[0003] In the related art, in order to alleviate the wear problem of the relatively moving parts of the pump body, a commonly used method is to rely on lubricating oil for lubrication. By setting an oil pump sheet in the oil hole inside the crankshaft, during the operation of the compressor, the crankshaft rotates at a high speed, and the oil pump sheet inside the oil hole will pump the lubricating oil into the oil hole of the crankshaft, and transport the lubricating oil to the pump body parts that need lubrication through the internal oil circuit, thereby lubricating the wear area.

[0004] However, during the initial startup of the compressor, since the pump body is not yet fully lubricated, low-frequency pre-lubrication is required to ensure that the pump body is sufficiently lubricated before gradually increasing the operating frequency. However, the pump oil efficiency at low frequency is low, resulting in the compressor often being in an oil-deficient state during the pre-lubrication stage, which not only aggravates the wear of components, but also seriously affects the user experience.

[0005] With the continuous advancement of compressor technology, miniaturization, high speed and high efficiency have become the development trend. The operating frequency of the compressor is increased from high speed (such as 120Hz) to ultra-high speed (≥150Hz), and the cooling capacity equivalent to that of a large-volume compressor is achieved by increasing the operating frequency on the basis of reducing the volume of the pump body. However, after the compressor is miniaturized, the size of the pump body crankshaft and the oil channel inside the crankshaft will also be reduced accordingly, resulting in a decrease in the flow of lubricating oil in the oil channel. At the same time, the increase in the operating frequency of the compressor further worsens the friction conditions of the pump body parts, making the inside of the pump body more prone to wear, thereby affecting the reliability of the compressor operation process.

[0006] Therefore, how to increase the circulation of lubricating oil and ensure that the pump body is adequately lubricated to improve the friction and wear of the pump body in the context of miniaturization and high speed of compressors has become a problem that needs to be solved urgently. Summary of the invention

[0007] The present application provides a crankshaft structure and a compressor thereof, which can increase the flow rate of lubricating oil, provide sufficient lubricating oil for the crankshaft structure, and improve the friction and wear of the pump body.

[0008] In a first aspect, the present application provides a crankshaft structure, comprising:

[0009] The shaft portion is provided with an oil circuit and a plurality of oil outlet holes, the plurality of oil outlet holes are respectively connected to the oil circuit, and the oil circuit is configured to transport lubricating oil; the oil circuit extends along the axial direction of the shaft portion, and the oil outlet holes extend along the radial direction of the shaft portion;

[0010] Wherein, an inner wall of the oil passage is provided with an oleophobic structure, so that the lubricating oil flows on the surface of the oleophobic structure.

[0011] In a possible implementation, the oleophobic structure includes an oleophobic layer and an etching layer, the etching layer is formed on an inner wall of the oil path, and the oleophobic layer is attached to the etching layer.

[0012] In a possible implementation, the etching layer includes a plurality of concave holes, and the concave holes are at least partially filled with the oleophobic layer;

[0013] The concave holes are prepared by etching with 35%-38% acetic acid and 17%-20% hydrogen peroxide;

[0014] The oleophobic layer is prepared from 0.01 mol / L-0.02 mol / L of perfluorocarboxylic acid.

[0015] In a possible implementation manner, the thickness of the oleophobic structure along the radial direction of the shaft portion is 5 μm-10 μm.

[0016] In a possible implementation manner, a wetting angle is formed between the oil passage and a tangent line of the lubricating oil, and the wetting angle is ≥150°.

[0017] In a possible implementation, the oil circuit includes an oil pump chamber and an oil storage chamber, the oil pump chamber is communicated with the oil storage chamber, and an oil pump sheet is provided in the oil pump chamber;

[0018] Wherein, the inner diameter of the oil pump cavity is larger than the inner diameter of the oil storage cavity, and both the oil pump cavity and the oil storage cavity are provided with the oil outlet hole.

[0019] In a possible implementation, the shaft portion includes a first shaft body, an eccentric portion, and a second shaft body connected in sequence, and the length of the first shaft body is greater than the length of the second shaft body;

[0020] The pump oil chamber is at least partially formed in the second shaft body and the eccentric portion, the oil storage chamber is formed in the first shaft body, and the length of the oil storage chamber is less than half of the length of the first shaft body.

[0021] In a possible implementation manner, the first shaft body and / or the second shaft body is provided with a tool relief groove.

[0022] In a second aspect, the present application provides a compressor, comprising:

[0023] The crankshaft structure as described in the first aspect;

[0024] A first bearing, sleeved on the crankshaft structure;

[0025] A second bearing, sleeved on the crankshaft structure, wherein the second bearing and the first bearing are spaced apart;

[0026] A roller, sleeved on the crankshaft structure, and the roller is sandwiched between the first bearing and the second bearing;

[0027] a slide connected to the roller; and

[0028] The cylinder is sleeved on the outer sides of the roller and the sliding sheet.

[0029] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art: the oleophobic structure is used in the crankshaft structure to form an oil circuit with super oleophobic performance, which significantly reduces the flow resistance caused by the kinematic viscosity of the lubricating oil itself, improves the circulation of the lubricating oil, and solves the problem of the operation of the compressor in the oil-deficient state. The oleophobic structure of the crankshaft structure is flexible in design, and is directly improved inside the oil circuit. It can automatically adapt to the crankshaft structures of different models and oil circuits of different structures. This compatibility and adaptability do not require a significant adjustment to the crankshaft production process in the relevant technology. And as the compressor develops towards miniaturization and high speed, its internal oil circuit area is limited. Based on the coordination between the oil circuit, the oil outlet and the oleophobic structure, by increasing the circulation of the lubricating oil, the compressor can enter the high-speed operation state faster, shorten the pre-lubrication time at startup, reduce the risk of wear failure, extend the service life, and improve the operational reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0033] Figure 1 A schematic cross-sectional view of a crankshaft structure and a pump body provided in an embodiment of the present application;

[0034] Figure 2 A schematic cross-sectional view of a crankshaft structure provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a crankshaft provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the wetting angle provided in the embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the force of the lubricating oil movement without an oleophobic structure provided in an embodiment of the present application;

[0038] Figure 6 This is a schematic diagram of the force of the lubricating oil movement provided with the oleophobic structure provided in the embodiment of the present application;

[0039] Figure 7 It is a cross-sectional schematic diagram of the pump body provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 1. Crankshaft structure; 11. Shaft; 111. Oil circuit; 1111. Pump oil chamber; 1112. Oil storage chamber; 112. Oil outlet hole; 113. Pump oil sheet; 114. First shaft body; 115. Eccentric portion; 116. Second shaft body; 117. Back-off groove; 12. Oleophobic structure; 121. Oleophobic layer; 122. Etching layer; 1221. Concave hole; 2. Pump body; 21. First bearing; 22. Second bearing; 23. Roller; 24. Sliding vane; 25. Cylinder; A. Lubricating oil; L. Tangent. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0044] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0045] In the related art, in the field of rotary compressor technology, the optimization of the lubrication system has always been the focus of research, especially for the trend of miniaturization and high speed of household compressors, which puts higher requirements on the lubrication system. However, there are still some shortcomings in the related art, which makes it difficult to meet these new requirements.

[0046] For example, in some compressors, a thrust plate and its oil storage and return structure are set on the lower end face of the crankshaft stub, which realizes the lubrication of the lower end face of the crankshaft and helps to transport the lubricating oil to the parts that need lubrication. This design improves the wear of the lower end face of the crankshaft to a certain extent. However, the setting of this structure increases the resistance during the rotation of the crankshaft, thereby increasing the power consumption of the compressor and reducing energy efficiency. In addition, this structure does not significantly improve the oil pumping efficiency of the crankshaft, so it is not suitable for the demand for lubrication efficiency after the miniaturization and high-speed operation of household compressors.

[0047] Alternatively, in some compressors, an eccentric axial oil hole is provided to increase the amount of pump oil by using the centrifugal force, and the axial oil hole is connected through the radial oil hole to meet the lubrication requirements. Although this design increases the amount of pump oil, its internal oil hole structure is complex and has high requirements for the crankshaft diameter, which undoubtedly increases the manufacturing difficulty and cost, and is also inconsistent with the trend of miniaturization and high speed of household compressors.

[0048] Alternatively, in some compressors, the structure and position of the oil outlet holes are optimized by setting the main oil hole, spiral oil groove, oil hole and vertical oil groove on the crankshaft long axis to improve the lubrication of key components. Although this design optimizes the distribution of lubricating oil to a certain extent, the oil droplets thrown out will still be affected by the operating frequency of the compressor, resulting in unstable lubrication effect. Especially after the miniaturization and high-speed operation of household compressors, the increase in demand for lubricating oil makes the limitations of this design more obvious.

[0049] In summary, there are still deficiencies in the optimization of the lubrication system of the compressor in the related art, especially in meeting the lubrication needs of household compressors after miniaturization and high speed. Therefore, it is of great significance to develop a lubrication system that can improve the pumping efficiency and adapt to the trend of miniaturization and high speed.

[0050] In order to solve the above technical problems, the present application provides a crankshaft structure, including a shaft portion, the shaft portion is provided with an oil circuit and a plurality of oil outlet holes, the plurality of oil outlet holes are respectively connected to the oil circuit, the oil circuit is configured to transport lubricating oil, the oil circuit extends along the axial direction of the shaft portion, and the oil outlet holes extend along the radial direction of the shaft portion, wherein the inner wall of the oil circuit is provided with an oleophobic structure so that the lubricating oil flows on the surface of the oleophobic structure. By utilizing the oleophobic structure, an oil circuit with super oleophobic properties is formed, which significantly reduces the flow resistance caused by the kinematic viscosity of the lubricating oil itself, increases the circulation of the lubricating oil, and solves the problem of the operation of the compressor in an oil-deficient state. The oleophobic structure of the crankshaft structure is flexibly designed, and is directly improved inside the oil circuit, and can automatically adapt to the crankshaft structures of different models and oil circuits of different structures. This compatibility and adaptability does not require substantial adjustments to the crankshaft production process in the relevant technology.

[0051] And as the compressor develops towards miniaturization and high speed, its internal oil circuit area is limited. Based on the coordination between the oil circuit, oil outlet hole and oil-repellent structure, by increasing the circulation of lubricating oil, the compressor can enter the high-speed operation state faster, shortening the pre-lubrication time at startup, reducing the risk of wear and failure, extending the service life, and improving operational reliability.

[0052] In some exemplary embodiments, Figure 1-Figure 3 As shown, a crankshaft structure 1 is applied to a compressor as a key component for driving the pump body 2 to rotate. The crankshaft structure 1 is not only responsible for providing the necessary torque to drive the pump body 2 to work, but also integrates an advanced lubrication system to ensure the lubrication effect of the pump body 2 during operation, thereby extending the service life of the compressor and improving the operating efficiency.

[0053] The crankshaft structure 1 includes a shaft portion 11, the central axis of which is hollow, so as to construct an oil passage 111 extending axially along the shaft portion 11, so that the lubricating oil can be transported along the central axis, thereby ensuring that the lubricating oil can be evenly and continuously supplied to various parts of the pump body 2 that need lubrication, so as to reduce the wear of the friction area of ​​the pump body 2 caused by friction.

[0054] A plurality of oil outlet holes 112 are distributed on the peripheral wall of the shaft portion 11, and the plurality of oil outlet holes 112 are all connected to the oil path 111, and the oil outlet holes 112 extend along the radial direction of the shaft portion 11 and penetrate the shaft portion 11. When the lubricating oil flows in the oil path 111, it is transported to the outside of the shaft portion 11, that is, the wear area on the pump body 2, through these oil outlet holes 112, thereby achieving effective lubrication.

[0055] It should be noted that the oil outlet holes 112 can be evenly distributed on the peripheral wall of the shaft 11 to improve the uniformity of lubrication and ensure that all positions of the shaft 11 can be fully lubricated to avoid wear or overheating problems caused by insufficient local lubrication.

[0056] Alternatively, the oil outlet holes 112 may be partially disposed on the peripheral wall of the shaft portion 11, that is, the oil outlet holes 112 are only disposed in specific areas of the peripheral wall of the shaft portion 11. This layout is usually used to solve specific friction problems in a targeted manner. For example, if the friction between the shaft portion 11 and certain contact areas of the pump body 2 is particularly severe, the number or density of the oil outlet holes 112 may be increased in these areas to increase the supply of lubricating oil. In this way, not only can the number of opening positions be effectively reduced and the overall structural strength of the shaft portion 11 be maintained, but also the lubrication needs can be solved more accurately and the lubrication efficiency can be improved.

[0057] In order to improve the flow efficiency of the lubricating oil, the inner wall of the oil circuit 111 is provided with an oleophobic structure 12. The oleophobic structure 12 can be made of special materials or surface treatment technology and has a lower surface energy, so that the lubricating oil can be more easily separated from the inner wall of the oil circuit 111 during the flow process, thereby reducing the kinematic viscosity between the lubricating oil and the inner wall of the oil circuit 111.

[0058] Due to the presence of the oleophobic structure 12, the flow resistance of the lubricating oil in the oil circuit 111 is effectively reduced. This not only speeds up the movement of the lubricating oil, but also increases the flow rate of the lubricating oil in the oil circuit 111. Therefore, the friction area of ​​the pump body 2 can be more fully and evenly lubricated, thereby reducing the heat and wear generated by friction, and improving the operating stability and reliability of the compressor.

[0059] The material of the shaft 11 should have good mechanical properties and wear resistance to ensure sufficient strength and stability while withstanding changes in torque and speed. At the same time, the material of the oleophobic structure 12 should have good oleophobic properties and corrosion resistance to ensure stability and reliability under long-term operation.

[0060] During the manufacturing process, the machining accuracy of the shaft 11 and the oil outlet holes 112 needs to be strictly controlled to ensure that the oil path 111 is unobstructed and the oil outlet holes 112 are evenly distributed. In addition, the surface treatment of the oleophobic structure 12 should also meet certain precision requirements to achieve the best oleophobic effect.

[0061] When installing the crankshaft structure 1, it is necessary to ensure that it cooperates well with the compressor pump body 2 to avoid excessive clearance or friction. At the same time, during the debugging process, the operation of the lubrication system should be checked to ensure that the lubricating oil can be smoothly delivered to each wear area of ​​the pump body 2.

[0062] The crankshaft structure 1 in this embodiment achieves effective lubrication and efficient driving of the compressor pump body 2 through an optimized shaft 11 design and a lubrication system, and utilizes the oil path 111 and the oil outlet hole 112 to jointly construct a complete oil channel to ensure that the lubricating oil can flow to various parts that need lubrication, and an oil-repellent structure 12 is provided on the inner wall of the oil path 111 to achieve an oil-repellent effect, so that the lubricating oil can be more easily separated from the inner wall of the oil path 111 during the flow process, thereby reducing the kinematic viscosity between the lubricating oil and the inner wall of the oil path 111, increasing the circulation amount of the lubricating oil, and reducing the energy consumption required to overcome frictional resistance.

[0063] The optimized lubrication system reduces the overheating and wear problems caused by insufficient lubrication, which not only improves the operating efficiency and stability of the compressor, but also extends the service life of the compressor and reduces maintenance costs. By improving lubrication efficiency and reducing energy consumption, the crankshaft structure 1 in this embodiment helps to reduce energy consumption and carbon emissions during the operation of the compressor, which meets the requirements of modern industry for environmental protection and sustainable development.

[0064] In some exemplary embodiments, Figure 1-Figure 4 As shown, an efficient oil-repellent structure 12 is provided to improve the flow efficiency of the lubricating oil in the oil circuit 111 and reduce oil retention and friction loss. Figure 4 As shown, the oleophobic structure 12 includes, for example, an oleophobic layer 121 and an etching layer 122 . The etching layer 122 is formed on the inner wall of the oil path 111 , and the oleophobic layer 121 is attached to the etching layer 122 to achieve its specific function.

[0065] For example, in order to improve the bonding force between the oleophobic layer 121 and the inner wall of the oil path 111 , the etching layer 122 may include a plurality of recessed holes 1221 , which may cover the entire inner wall of the oil path 111 and are formed by an etching process.

[0066] It should be noted that Figure 4 The concave hole 1221 is only for schematic illustration, and the shape in the diagram does not constitute a limitation to the present application. The shape in the diagram is only for the convenience of better understanding, and is used to illustrate the coordination between the uneven structure in the concave hole 1221 and the oleophobic layer 121, thereby increasing the contact area. The oleophobic layer 121 and the concave hole 1221 also form an interlocking effect, further enhancing the auxiliary force.

[0067] Before etching, it is necessary to ensure that the inner wall of the oil circuit 111 is clean and free of impurities to facilitate subsequent processing. The shaft 11 has good corrosion resistance and mechanical strength to withstand the pressure and friction during operation, as well as the corrosion during etching. As long as the required roughness can be formed, etching can be avoided to affect the overall structural strength of the shaft 11.

[0068] Prepare an etching solution by mixing 35%-38% acetic acid and 17%-20% hydrogen peroxide in a certain proportion. The etching solution has good corrosiveness and selectivity and can form the required microscopic rough surface without damaging the base material of the shaft 11.

[0069] The inner wall of the oil circuit 111 is immersed in the etching liquid and maintained for a certain etching time, such as 1.5h-3h. During the etching process, the etching liquid will corrode the surface material of the inner wall of the oil circuit 111, forming an uneven rough surface, and its uneven structure constitutes the concave hole 1221, thereby improving the solid-liquid capacity. After the etching is completed, the inner wall of the oil circuit 111 can be cleaned with deionized water to remove residual etching liquid and impurities.

[0070] In order to form the oleophobic layer 121 with super oleophobic properties, a modification liquid is also prepared. The modification liquid is composed of a 0.01 mol / L-0.02 mol / L perfluorocarboxylic acid solution. The perfluorocarboxylic acid molecule has a special fluorocarbon chain structure, which can give the modification liquid excellent oleophobic properties.

[0071] The etched oil path 111 is immersed in the modification liquid for a certain immersion time, such as 2h-3h. During the immersion process, the perfluorocarboxylic acid molecules in the modification liquid will penetrate into the concave holes 1221 and form a dense oleophobic layer 121 on the surface of the etching layer 122. Due to the presence of the concave holes 1221, at least part of the structure of the oleophobic layer 121 can be filled in the concave holes 1221, increasing the connection area between the oleophobic layer 121 and the etching layer 122, thereby improving the adhesion and stability of the oleophobic layer 121.

[0072] After the soaking is completed, the oil circuit 111 is taken out of the modification liquid, and the modification liquid remaining on the surface is cleaned with deionized water. Then, the oil circuit 111 is placed in a drying oven and dried and cured at an appropriate temperature (such as room temperature or slightly above room temperature). This step helps to further consolidate the structure of the oleophobic layer 121 and improve its durability and stability.

[0073] In this embodiment, if Figure 1-Figure 4 As shown, the shaft 11, as a core component in mechanical equipment, undertakes important functions such as transmitting power and supporting rotation. In order to ensure that the parts of the shaft 11 that do not need to be coated during the processing are not affected by etching, a protective layer (not shown in the figure) can also be provided on its outer wall. The main material of the protective layer is tape or other materials with excellent adhesion, corrosion resistance and wear resistance. The selection of these materials is intended to ensure that the protective layer can fit tightly to the outer wall of the shaft 11, and effectively isolate the direct erosion of the shaft 11 by the external medium. That is, before the etching process is carried out, the outer surface of the crankshaft structure 1 is wrapped, wherein only the oil circuit 111 is exposed, so as to facilitate targeted etching of the oil circuit 111.

[0074] Before the protective layer is provided, the outer wall of the shaft 11 can be thoroughly cleaned. By removing impurities such as oil and dust on the surface, it is ensured that the protective layer can be tightly and evenly adhered to the outer wall of the shaft 11, thereby improving the sealing and durability of the protective layer.

[0075] According to the predetermined position and range, the selected tape is evenly formed on the outer wall of the shaft portion 11. During the processing, attention is paid to the edge processing of the tape to ensure that the edge is flat and free of bubbles to further improve the protective effect of the protective layer.

[0076] After the protective layer is formed, necessary inspections are carried out to ensure that there are no omissions, misalignment or damage to the protective layer. At the same time, the position and range of the protective layer can also be recorded for reference and verification during subsequent processing or use.

[0077] By providing the protective layer, those parts of the shaft 11 that do not need to be coated are effectively protected, which not only avoids the risk of these parts being etched during subsequent processing or use, but also ensures the overall performance and service life of the shaft 11. At the same time, the provision of the protective layer also facilitates subsequent processing such as coating preparation, reducing processing difficulty and cost.

[0078] After the protective layer is set, the oleophobic structure 12 of the oil path 111 is prepared. The protective layer wraps the outer surface of the crankshaft structure 1, which can prevent the microscopic morphology of the outer surface of the crankshaft structure 1 from being destroyed, and effectively protects the area of ​​the crankshaft structure 1 that does not need to be etched. When the preparation process of the oleophobic structure 12 is completed, the protective layer can be removed.

[0079] In this embodiment, if Figure 1-Figure 4 As shown, in order to ensure the effectiveness and economy of the oleophobic structure 12, the thickness design of the oleophobic structure 12 is further considered, which directly affects the durability and processing efficiency of the structure.

[0080] If the thickness of the oleophobic structure 12 is too thin, for example, the thickness of the oleophobic structure 12 is less than 5 μm, it may be fragile when facing the lubricating oil containing abrasive particles. These abrasive particles may continuously rub the oleophobic structure 12 during the lubrication process, causing damage to its surface, thereby affecting its oleophobic performance and shortening its service life. Therefore, in order to avoid this situation, we set a minimum thickness limit for the oleophobic structure 12.

[0081] If the thickness of the oleophobic structure 12 is too large, for example, the thickness of the oleophobic structure 12 exceeds 10 μm, although the wear resistance may be improved to some extent, it will significantly increase the processing time and material consumption, thereby increasing the manufacturing cost and causing unnecessary waste of resources. Especially in large-scale production, such an increase in thickness will have a significant impact on the overall cost-effectiveness.

[0082] Therefore, in order to balance durability and economy, the thickness of the oleophobic structure 12 in the radial direction of the shaft 11 is controlled within the range of 5 μm to 10 μm in this embodiment. This design not only ensures that the oleophobic structure 12 has sufficient durability when facing lubricating oil containing abrasive particles, but also ensures the efficiency and economy of the processing process, avoiding unnecessary waste of resources.

[0083] In this embodiment, if Figure 1-Figure 4 As shown, the design aims to achieve efficient lubrication and oil management by optimizing the interaction between the surface of the oil passage 111 and the lubricating oil.

[0084] The oil passage 111 has a specific surface property through the oleophobic structure 12, so that when the lubricating oil contacts it, a significant wetting angle is formed between the two. This wetting angle is determined by observing the shape of the lubricating oil droplets on the surface of the oil passage 111. Figure 4 As shown, the lubricating oil A exists in the oil passage 111 in the form of drops, and its boundary is clearly discernible and can be clearly defined by drawing a tangent line L. The angle between the tangent line L and the surface of the oil passage 111 is the wetting angle θ.

[0085] When the wetting angle θ is greater than or equal to 150°, the surface of the oil path 111 has super oleophobic properties, that is, when the wetting angle θ on the solid-liquid interface (oleophobic structure 12) is greater than or equal to 150°, the surface can be considered to have super oleophobic properties. Since the focus here is on the case where the lubricating oil A is the liquid phase, this surface structure with super oleophobic properties is called a super oleophobic coating, that is, the oleophobic structure 12.

[0086] During the preparation process, advanced surface treatment technologies such as nanostructure construction and low surface energy material coating are used to form a coating with a specific micro-nano structure and chemical composition, namely, an oleophobic structure 12, on the surface of the oil circuit 111. These micro-nano structures and chemical compositions act together on the lubricating oil droplets, making it difficult for them to spread on the coating surface, thereby forming a larger wetting angle.

[0087] In practical applications, this super-oleophobic property can significantly reduce the adhesion and residue of lubricating oil on the surface of the oil circuit 111, and improve the fluidity and utilization efficiency of the lubricating oil.

[0088] The oleophobic structure 12 prepared in this embodiment has an oleophobic layer 121 with excellent super-repellent properties for lubricating oil. When the lubricating oil flows through the oil path 111, the oleophobic layer 121 can quickly guide the lubricating oil to slide over the inner wall, reducing oil retention and friction loss. At the same time, due to the presence of the concave hole 1221, the contact area between the lubricating oil and the inner wall of the oil path 111 is increased, further improving the lubrication effect and oil delivery efficiency.

[0089] The oleophobic structure 12 can be widely used in various occasions requiring efficient lubrication and oil delivery, such as internal combustion engines, hydraulic systems, lubrication systems, etc. By optimizing the design and preparation process of the oleophobic structure, the operating efficiency and reliability of the compressor can be significantly improved, and energy consumption and maintenance costs can be reduced.

[0090] In some exemplary embodiments, Figure 1-Figure 4 As shown, the oil circuit 111 includes an oil pump chamber 1111 and an oil storage chamber 1112. The oil pump chamber 1111 is connected to the oil storage chamber 1112. The oil pump chamber 1111, the oil storage chamber 1112 and the oil outlet hole 112 together constitute a complete lubrication system.

[0091] Among them, an oil pump sheet 113 is provided in the oil pump chamber 1111. The oil pump sheet 113 effectively pumps and distributes lubricating oil during the operation of the compressor. The oil pump sheet 113 cooperates with the oil circuit 111 and the oil outlet hole 112 to ensure that all internal components of the compressor are fully lubricated.

[0092] The oil pump sheet 113, by its specific shape and movement, can effectively draw the lubricating oil from the oil pool and deliver it to various parts of the compressor that need lubrication when the compressor crankshaft structure 1 rotates. And the oil pump sheet 113 needs to maintain good sealing with the compressor housing and the crankshaft structure 1 to prevent the leakage of lubricating oil and ensure the normal operation of the lubrication system.

[0093] Since the oil pump sheet 113 works continuously in the compressor, there will be friction between the oil pump sheet 113 and the crankshaft structure 1 and the housing, so the oil pump sheet 113 needs to have good wear resistance to extend its service life.

[0094] When the oleophobic structure 12 is applied to the crankshaft structure 1, it can not only reduce the flow resistance of the lubricating oil inside the oil passage 111 and increase the flow rate, but also form a good match with the oil pump sheet 113 to further improve the lubrication efficiency of the compressor. The oleophobic structure 12 can significantly reduce the friction resistance between the lubricating oil and the surface of the oil passage 111, so that the driving force required by the oil pump sheet 113 when pumping the lubricating oil is reduced, which helps to reduce the energy consumption of the compressor.

[0095] Since the oleophobic structure 12 reduces the flow resistance of the lubricating oil in the oil path 111, the oil pumping sheet 113 can more easily pump the lubricating oil into the compressor, thereby improving the pumping efficiency. The oleophobic structure 12 also reduces the friction between the lubricating oil and the crankshaft structure 1, and indirectly reduces the wear between the oil pumping sheet 113 and the crankshaft structure 1, thereby extending the service life of the oil pumping sheet 113.

[0096] The oil pump chamber 1111 is responsible for pumping the lubricating oil into the oil circuit 111 of the crankshaft structure 1 through the oil pump plate 113 inside it when the crankshaft structure 1 rotates at high speed. In order to ensure the oil pumping efficiency, the oil pump chamber 1111 is designed to have a certain inner diameter size, for example, the inner diameter size is larger than the inner diameter size of the oil storage chamber 1112. This design has two main purposes: one is to provide sufficient activity space for the oil pump plate 113 to ensure that it can smoothly pump out the lubricating oil when rotating at high speed; the second is to increase the pressure of the pump oil by reducing the cross-sectional area of ​​the oil outlet (that is, the inner diameter of the oil storage chamber 1112), so that the oil can be transported to a higher position. Among them, the oil flow rate enhancement effect of the oil-repellent structure 12 is related to the cross-sectional area of ​​the oil circuit 111. The narrower the oil circuit 111, the better the oil flow rate effect.

[0097] The oil storage chamber 1112 is a region in the oil circuit 111 for storing lubricating oil. It is connected to the pump oil chamber 1111 to ensure that the lubricating oil can flow smoothly from the pump oil chamber 1111 to the oil storage chamber 1112. Since the inner diameter of the oil storage chamber 1112 is smaller than that of the pump oil chamber 1111, when the lubricating oil flows from the pump oil chamber 1111 to the oil storage chamber 1112, it will be subject to a certain pressure difference, which helps the pump oil sheet 113 to pump out the lubricating oil more effectively, and then flow smoothly into the oil storage chamber 1112.

[0098] In addition, in order to achieve smooth flow and precise control of lubricating oil, both the pump oil chamber 1111 and the oil storage chamber 1112 are provided with oil outlet holes 112. The positions and number of these oil outlet holes 112 can be adjusted according to actual needs to ensure that the lubricating oil can be evenly distributed to various parts of the crankshaft structure 1 that need lubrication.

[0099] In specific implementation, we can integrate the oil circuit 111 into the crankshaft structure 1, and ensure that the positions and sizes of the oil pump chamber 1111, the oil storage chamber 1112 and the oil outlet hole 112 meet the design requirements through precise processing and assembly. At the same time, we also need to select a suitable material for the oil pump sheet 113 to ensure that it can maintain stable oil pumping performance at high-speed rotation.

[0100] The oil circuit 111 in this embodiment realizes efficient lubricating oil pumping and precise control by reasonably designing the inner diameters of the pump oil chamber 1111 and the oil storage chamber 1112 and the positions and number of the oil outlet holes 112. This design not only improves the lubrication performance of the crankshaft structure 1, but also prolongs its service life.

[0101] In this embodiment, if Figure 1-Figure 4 As shown, an efficient lubrication system is provided based on the crankshaft structure 1, which aims to optimize the crankshaft structure 1 to ensure that all key friction parts can be fully lubricated during the operation of the compressor, reduce wear, and improve the stability and service life of the compressor.

[0102] The crankshaft structure 1 includes a shaft 11, which includes a first shaft 114, an eccentric portion 115, and a second shaft 116 connected in sequence. The length of the first shaft 114 is greater than the length of the second shaft 116. The asymmetric design not only meets the mechanical requirements of the compressor operation, but also provides a basis for the efficient operation of the lubrication system. Among them, the first shaft 114 is a long shaft, which mainly bears the connection and support functions, and the second shaft 116 is a short shaft. One end of the second shaft 116 extends into the oil pool to guide the lubricating oil in the oil pool into the oil circuit 111.

[0103] The eccentric portion 115 is located between the first shaft 114 and the second shaft 116, which not only meets the power transmission requirements of the compressor when it is working, but also directly participates in the formation of the pump oil chamber 1111. The pump oil chamber 1111 is mainly formed on the second shaft 116 and the eccentric portion 115. This design enables the centrifugal force to effectively draw the lubricating oil from the oil pool and pump it into the pump oil chamber 1111 when the crankshaft structure 1 rotates.

[0104] It should be noted that, according to actual application requirements, the structure of the oil pump chamber 1111 has a certain degree of flexibility, and a small part of its structure can also be appropriately extended to the first shaft 114 to further extend the oil pump path and enhance the oil pump efficiency.

[0105] The oil storage chamber 1112 is formed in the first shaft body 114, and its length is controlled to be approximately half of the length of the first shaft body 114. Specifically, the length of the oil storage chamber 1112 is less than half of the length of the first shaft body 114. This design not only ensures sufficient lubricating oil reserves, but also avoids pressure loss caused by excessive length, ensuring that the lubricating oil can effectively reach and lubricate key grinding surfaces such as the crankshaft structure 1 and the upper bearing (i.e., the first bearing 21) in the pump body 2.

[0106] In addition, oil outlet holes 112 are provided on the first shaft body 114. These oil outlet holes 112 are precisely positioned to accurately guide the lubricating oil in the oil storage chamber 1112 to various components that need lubrication inside the compressor, especially the grinding surfaces of the crankshaft structure 1 and the upper bearing in the pump body 2, thereby significantly reducing friction losses and improving overall operating efficiency.

[0107] When the compressor starts and rotates at high speed, the crankshaft structure 1 drives the oil pump plate 113 to rotate synchronously, and utilizes the pumping action of the oil pump chamber 1111 to suck the lubricating oil in the oil pool and pressurize it into the oil pump chamber 1111. Subsequently, the lubricating oil smoothly enters the oil storage chamber 1112 through the connecting path between the oil pump chamber 1111 and the oil storage chamber 1112. As the crankshaft structure 1 continues to rotate, the lubricating oil in the oil storage chamber 1112 is accurately sprayed to the wear area of ​​each part inside the compressor through the oil outlet 112 under appropriate pressure, especially the friction surface of the crankshaft structure 1 and the upper bearing in the pump body 2 is efficiently lubricated, effectively reducing wear and extending the service life of the compressor.

[0108] This embodiment achieves efficient lubrication of the compressor by designing the crankshaft structure 1 and the layout of its internal oil circuit 111, which not only improves the operating stability and efficiency of the compressor, but also significantly reduces maintenance costs and downtime, and has significant technical advantages and application value.

[0109] In this embodiment, if Figure 1-Figure 4 As shown, the first shaft body 114 is provided with a tool withdrawal groove 117. The main purpose of this design is to ensure that the tool can be smoothly withdrawn after completing the turning operation on the shaft portion 11 during the turning process. The existence of the tool withdrawal groove 117 effectively avoids the interference between the tool and the workpiece (i.e., the first shaft body 114), thereby ensuring the smooth progress of the entire processing process. In addition, the tool withdrawal groove 117 also has another important function, that is, during the assembly process of the workpiece (shaft portion 11), it can help the workpiece to be accurately positioned at a predetermined position, effectively avoiding assembly difficulties caused by incorrect positioning, and improving assembly efficiency and accuracy.

[0110] Of course, it is understandable that the setting of the tool backing groove 117 is not limited to the first shaft body 114. According to actual needs, the second shaft body 116 can also be provided with a tool backing groove 117 to achieve smooth tool backing and accurate positioning of the workpiece. This design makes the entire shaft system more flexible and versatile.

[0111] The tool backing groove 117 is arranged adjacent to the eccentric portion 115. Such a layout not only meets the need for tool backing out, but also facilitates positioning using the tool backing groove 117 during assembly. The eccentric portion 115 is an important component of the shaft portion 11. Its existence enables the shaft portion 11 to achieve specific motion or transmission functions. The close combination of the tool backing groove 117 and the eccentric portion 115 further improves the overall performance and reliability of the shaft portion 11.

[0112] In order to further improve the lubrication effect of the shaft 11 and its related parts, oil outlet holes 112 can be provided on the backing groove 117 and the eccentric part 115. These oil outlet holes 112 are connected to the working chamber of the lubrication pump body 2, so that the lubricating oil can smoothly reach the mutually frictional and worn surfaces between the crankshaft structure 1, the roller 23, the sliding vane 24 and the cylinder 25. Such a design not only reduces friction and wear, but also prolongs the service life of the shaft 11 and its related parts. At the same time, a good lubrication effect also helps to improve the operating efficiency and stability of the entire mechanical system.

[0113] This embodiment achieves high efficiency, accuracy and reliability in the processing, assembly and operation of the shaft 11 and its related components by providing the undercut groove 117 and optimizing its layout and function, and adding the oil outlet hole 112 to improve the lubrication effect. These improvement measures not only improve the overall performance of the mechanical system, but also bring a better user experience to the user.

[0114] The lubricating oil of the crankshaft structure 1 proposed in the present application enters the pump oil chamber 1111 and the oil storage chamber 1112 in the oil circuit 111 through the oil pool, and is transported to the grinding area of ​​the pump body 2 through the oil outlet holes 112 on the pump oil chamber 1111 and the oil storage chamber 1112. The crankshaft structure 1 having the above-mentioned oleophobic structure 12 is applied to the compressor, which can effectively improve the flow rate inside the oil circuit 111 in the crankshaft structure 1.

[0115] like Figure 5 As shown, in the oil passage 111 of the crankshaft structure 1, when the oil-repellent structure 12 is not formed, the lubricating oil droplets are pushed by the centrifugal force (such as F 推 ) is pumped into the oil passage 111 of the crankshaft structure 1. When the oil passage 111 in the crankshaft structure 1 is used for transportation, in addition to overcoming its own gravity (G), it is also necessary to overcome the flow resistance (f) caused by its own viscosity, that is, the resistance between the viscosity of the lubricating oil itself and the inner wall of the oil passage 111 of the crankshaft structure 1. Due to the existence of this resistance, the flow velocity of the lubricating oil inside the oil passage 111 is high in the center and low at the edge, resulting in a low flow rate per unit area of ​​the oil passage 111.

[0116] like Figure 6 As shown, when the oleophobic structure 12 is formed in the oil circuit 111 of the crankshaft structure 1, the flow resistance (f) between the viscosity of the lubricating oil itself and the inner wall of the oil circuit 111 can be eliminated, so that the lubricating oil only needs to overcome its own gravity (G) during the transportation process. The force state of the lubricating oil droplets at the center and the edge of the oil circuit 111 is consistent, and the flow velocity at different positions of the cross section is also consistent. At the same time, since there is flow resistance in the center when transporting without the oleophobic structure 12, the overall speed of the lubricating oil droplets transported by the oleophobic structure 12 will be higher than the maximum speed without the oleophobic structure 12, that is, v0>v, resulting in a significant increase in the flow rate of the lubricating oil per unit area.

[0117] At the same time, in the initial stage of restarting the compressor, the rotation speed of the crankshaft structure 1 is relatively low, and the centrifugal force pushing the pump oil is relatively small. The oleophobic structure 12 can eliminate the movement resistance encountered during the transportation of the lubricating oil, accelerate the lubrication process of the pump body 2, and enable the compressor to enter a high-speed operation state faster.

[0118] In the present application, an oleophobic structure 12 is prepared inside the crankshaft structure 1, thereby avoiding the movement resistance of the lubricating oil due to its own viscosity when flowing in the oil circuit 111, accelerating the flow of the lubricating oil during the operation of the pump body 2, meeting the lubrication requirements of the pump body 2 parts during the operation of the compressor, reducing the increased friction and severe wear of the compressor pump body 2 due to lubrication problems, and ensuring the long-term and efficient operation of the compressor.

[0119] The oleophobic structure 12 accelerates the oil pumping rate of the compressor pump body 2, increases the oil pumping amount of the compressor in the initial startup stage, shortens the pre-lubrication time of the compressor, and effectively improves the user experience and product competitiveness.

[0120] The present application also provides a compressor, such as Figure 1-Figure 7 As shown, to achieve efficient and stable compression function. The compressor includes a crankshaft structure 1 and a pump body 2 as in any of the above embodiments. The crankshaft structure 1 ensures its high precision and high reliability during operation. The pump body 2 is connected to the crankshaft structure 1 to form the working body of the compressor. The pump body 2 includes a first bearing 21, a second bearing 22, a roller 23, a sliding vane 24 and a cylinder 25.

[0121] The first bearing 21 is sleeved on the crankshaft structure 1, and the second bearing 22 is sleeved on the crankshaft structure 1, and the second bearing 22 and the first bearing 21 are arranged at intervals, which not only ensures the stable rotation of the crankshaft structure 1 in the pump body 2, but also effectively disperses the load during operation and prolongs the service life of the bearing.

[0122] The roller 23 is sleeved on the crankshaft structure 1 and sandwiched between the first bearing 21 and the second bearing 22, which further enhances the support stability of the crankshaft structure 1 in the pump body 2 and also helps to reduce friction and wear during operation.

[0123] The vane 24 is connected to the roller 23 so that the vane 24 can move with the rotation of the roller 23, thereby forming an effective sealing space in the cylinder 25. The sealing space changes continuously with the rotation of the crankshaft structure 1, realizing the process of gas intake, compression and discharge.

[0124] The cylinder 25 is sleeved on the outer side of the roller 23 and the sliding vane 24 to form the working chamber of the compressor. A dynamic sealing structure is formed between the inner wall of the cylinder 25 and the sliding vane 24 to ensure the high efficiency and stability of the gas during the compression process.

[0125] The compressor provided in the present application realizes efficient and stable compression function by combining the crankshaft structure 1 with the pump body 2. Among them, the layout and coordination of the first bearing 21, the second bearing 22, the roller 23, the slide 24 and the cylinder 25 in the pump body 2 jointly ensure the high precision and high reliability of the compressor during operation.

[0126] The oleophobic structure 12 provided in the present application can be adapted to the oil circuit 111 design of the crankshaft structure 1 of various models, has wide applicability, and can be used in various household compressors such as air conditioners, air conditioners, refrigerators, and multi-split units.

[0127] The crankshaft structure 1 with the oleophobic structure 12 can improve the delivery flow of the lubricating oil after it is pumped into the crankshaft structure 1, and ensure that during the operation of the compressor, each pump body 2 has sufficient lubricating oil between the wear parts to lubricate and reduce friction and wear.

[0128] The oil circuit 111 with the oleophobic structure 12 can increase the flow rate of the lubricating oil pumped into the pump body 2 during the startup phase of the compressor, reduce the lubrication time during the initial startup phase of the compressor, improve the response efficiency of the compressor, improve the user experience, and enhance the market competitiveness of the product.

[0129] The oil circuit 111 design with the oil-repellent structure 12 can be used in a smaller oil circuit 111 after the compressor is miniaturized, effectively increasing the delivery flow rate of the lubricating oil, reducing the friction and wear of the pump body 2 during operation, and ensuring stable and effective operation after the compressor is miniaturized and highly efficient.

[0130] The design of the oil circuit 111 with the oleophobic structure 12 has little impact on the production and preparation process of the crankshaft structure 1 in the related technology. Preparation is only performed inside the oil circuit 111 of the crankshaft structure 1 and does not interfere with the processing of other working surfaces of the crankshaft structure 1.

[0131] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0132] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0133] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A crankshaft structure, characterized in that: include: The shaft portion is provided with an oil circuit and a plurality of oil outlet holes, the plurality of oil outlet holes are respectively connected to the oil circuit, and the oil circuit is configured to transport lubricating oil; the oil circuit extends along the axial direction of the shaft portion, and the oil outlet holes extend along the radial direction of the shaft portion; Wherein, an inner wall of the oil passage is provided with an oleophobic structure, so that the lubricating oil flows on the surface of the oleophobic structure.

2. The crankshaft structure according to claim 1, characterized in that: The oleophobic structure comprises an oleophobic layer and an etching layer, wherein the etching layer is formed on the inner wall of the oil path, and the oleophobic layer is attached to the etching layer.

3. The crankshaft structure according to claim 2, characterized in that: The etching layer includes a plurality of recessed holes, and the recessed holes are at least partially filled with the oleophobic layer; The concave holes are prepared by etching with 35%-38% acetic acid and 17%-20% hydrogen peroxide; The oleophobic layer is prepared from 0.01 mol / L-0.02 mol / L of perfluorocarboxylic acid.

4. The crankshaft structure according to claim 1, characterized in that: The thickness of the oleophobic structure along the radial direction of the shaft portion is 5 μm-10 μm.

5. The crankshaft structure according to claim 1, characterized in that: A wetting angle is formed between the oil passage and the tangent line of the lubricating oil, and the wetting angle is ≥150°.

6. The crankshaft structure according to claim 1, characterized in that: The oil circuit includes an oil pump chamber and an oil storage chamber, the oil pump chamber is connected to the oil storage chamber, and an oil pump sheet is arranged in the oil pump chamber; Wherein, the inner diameter of the oil pump cavity is larger than the inner diameter of the oil storage cavity, and both the oil pump cavity and the oil storage cavity are provided with the oil outlet hole.

7. The crankshaft structure according to claim 6, characterized in that: The shaft portion comprises a first shaft body, an eccentric portion and a second shaft body connected in sequence, and the length of the first shaft body is greater than the length of the second shaft body; The pump oil chamber is at least partially formed in the second shaft body and the eccentric portion, the oil storage chamber is formed in the first shaft body, and the length of the oil storage chamber is less than half of the length of the first shaft body.

8. The crankshaft structure according to claim 7, characterized in that: The first shaft body and / or the second shaft body are provided with a tool relief groove.

9. A compressor, characterized in that: include: Pump body; as well as The crankshaft structure according to any one of claims 1 to 8, wherein the crankshaft structure is connected to the pump body.

10. The compressor according to claim 9, characterized in that The pump body comprises: A first bearing, sleeved on the crankshaft structure; A second bearing, sleeved on the crankshaft structure, wherein the second bearing and the first bearing are spaced apart; A roller, sleeved on the crankshaft structure, and the roller is sandwiched between the first bearing and the second bearing; a slide connected to the roller; and The cylinder is sleeved on the outer sides of the roller and the sliding sheet.

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