Oil baffle cap, compressor and assembly method of compressor

Abstract

The invention provides an oil baffle cap, a compressor and an assembly method of the compressor, and belongs to the technical field of compressors, the oil baffle cap comprises a cap body, the cap body is fixed on one side of a rotor of the compressor, a connecting cylinder is arranged in the cap body, a connecting hole is formed in the connecting cylinder, and the diameter of the connecting hole is larger than the outer diameter of a crankshaft of the compressor. N welding grooves are formed in the connecting cylinder and are welded and fixed with a crankshaft of the compressor, so that the oil baffle cap is fixed on the crankshaft of the compressor; n is a natural number greater than 1. The oil baffle cap can be welded and fixed with the crankshaft of the compressor through the welding groove, and the crankshaft does not need to be in interference fit with a shaft hole of a rotor in the assembling process, so that deformation of a rotor iron core can be effectively reduced, noise during operation of the compressor is reduced, and vibration of the compressor is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to an oil deflector cap, a compressor and an assembly method of the compressor. Background Art

[0002] With the development of economy and the acceleration of industrialization, the market demand for air-conditioning equipment, as an important tool for regulating indoor temperature, continues to grow. In order to meet the market demand for high efficiency, energy saving and low cost of air-conditioning equipment, the compressor, as the core component of the air-conditioning system, has continuously improved and innovated its design and manufacturing technology. However, with the continuous rise of global energy costs, especially the significant increase in raw material prices, the home appliance industry is facing huge cost pressure. In order to reduce costs while maintaining product competitiveness, air-conditioning manufacturers have sought to improve the miniaturization of compressors. Although miniaturized compressors can reduce the use of raw materials, reduce production costs and improve energy efficiency. However, miniaturization also brings a series of problems. For example, the miniaturized design reduces the strength of the compressor's shaft structure, making the compressor's shaft structure prone to large deformation when running at high speed.

[0003] like Figure 1-Figure 2 As shown, the pump assembly and the motor of the traditional compressor are often connected by interference fit, that is, the interference fit between the crankshaft and the rotor shaft hole. The rotor assembly includes a balance block, an oil deflector cap, a rotor, rivets, magnetic steel and other structures. The oil deflector cap is fixed to the rotor core by rivets, and there are many iron core slots in the rotor, accounting for more than 40% of the total area, resulting in a thin rotor contact shaft wall. The interference fit between the crankshaft and the rotor shaft hole, on the one hand, is easy to cause deformation of the rotor during the production process; on the other hand, when the compressor is running at high speed, due to the thin wall of the rotor, there is severe extrusion between the rotor and the crankshaft, which is easy to cause the rotor to be unstable during high-speed operation, resulting in abnormal noise and vibration of the compressor, seriously affecting the customer experience.

[0004] Therefore, it is necessary to improve the existing sandblasting equipment to overcome the defects of the prior art. Summary of the invention

[0005] In order to overcome the problems existing in the related technology, one of the objects of the present invention is to provide an oil deflector cap, which can be welded and fixed to the crankshaft of the compressor through a welding groove. During the assembly process, the crankshaft does not need to have an interference fit with the shaft hole of the rotor, which can effectively reduce the deformation of the rotor core, thereby reducing the noise during the operation of the compressor and reducing the vibration of the compressor.

[0006] An oil deflector cap comprises a cap body, wherein the cap body is fixed on one side of a rotor of a compressor, wherein a connecting cylinder is provided in the cap body, wherein a connecting hole is provided in the connecting cylinder, and wherein a diameter of the connecting hole is larger than an outer diameter of a crankshaft of the compressor; wherein N welding grooves are provided on the connecting cylinder, wherein the welding grooves are welded and fixed to the crankshaft of the compressor, so that the oil deflector cap is fixed on the crankshaft of the compressor; and wherein N is a natural number greater than 1.

[0007] In traditional compressor assembly, the crankshaft usually needs to be interference fit with the shaft hole of the rotor to ensure a tight connection, which often causes the rotor core to deform under stress. The present application uses the welding groove on the oil deflector cap to weld and fix it to the crankshaft, and the diameter of the connecting hole is larger than the outer diameter of the compressor crankshaft, thereby avoiding direct interference fit between the crankshaft and the rotor shaft hole, thereby significantly reducing the deformation of the rotor core.

[0008] The deformation of the rotor core not only affects the performance of the compressor, but also causes additional noise during operation. Since the solution of the present application can reduce the deformation of the rotor core, it can effectively reduce the noise during the operation of the compressor and improve the user experience. In addition, the deformation and imbalance of the rotor core are also one of the main causes of compressor vibration. By reducing the deformation of the rotor core, the present application helps to reduce the vibration of the compressor and improve the stability and reliability of the compressor.

[0009] In a preferred technical solution of the present invention, the N welding grooves are arranged on the connecting tube along the circumference of the connecting tube, and the height direction of the welding grooves is set along the axial direction of the connecting tube.

[0010] The welding grooves are arranged along the circumference of the connecting tube, which can ensure that the crankshaft and the oil deflector cap are evenly supported and fixed in multiple directions, and enhance the stability of the connection between the oil deflector cap and the crankshaft. This distributed welding method can better resist external forces than single-point or a few-point welding, and improves the reliability and durability of the connection.

[0011] The welding groove is arranged along the axis direction of the connecting tube, so that the length of the weld is longer and the welding area is larger during welding. This helps to improve the welding quality and ensure the strength and sealing of the welding. At the same time, welding along the axis direction also helps to reduce stress concentration during welding and reduce the risk of welding deformation and cracks.

[0012] In a preferred technical solution of the present invention, the cap body includes a base plate and a convex ring, the convex ring is arranged at the edge of the base plate, and the connecting tube is arranged in the middle of the base plate;

[0013] The connecting tube and the convex ring both protrude outward from one side of the base plate in the same protruding direction.

[0014] The convex ring is set on the edge of the base plate, which can increase the overall size and rigidity of the oil retaining cap, help reduce damage to the oil retaining cap caused by vibration or impact, and improve the operating stability of the compressor. In addition, the design of this cap body is relatively simple, and the connection and layout between the components are reasonable, which helps to simplify the manufacturing and processing process.

[0015] In a preferred technical solution of the present invention, the length of the welding groove L = (0.05-0.35) * L0, the width of the welding groove W = 2mm-5mm, and the depth of the welding groove D = 2mm-3mm;

[0016] Wherein L0 is the height of the rotor, and the depth D of the weld refers to the depth of the weld groove along the diameter direction of the connecting tube.

[0017] The design of the weld groove helps control the deformation during welding. A weld groove that is too long will increase welding stress and deformation and reduce welding efficiency; while a weld that is too short may affect the strength and stability of the connection. By designing the weld length reasonably, the welding deformation can be minimized while ensuring the connection strength.

[0018] In a preferred technical solution of the present invention, along the axial direction of the oil deflector cap, the height of the connecting tube is L1, and the height of the convex ring is L2, wherein L1=L2+0-15mm.

[0019] The present application can optimize the overall structural balance of the oil deflector cap by adjusting the height difference (0-15mm) between the connecting tube and the convex ring. This design helps to reduce the vibration and noise caused by imbalance and improve the operating stability of the compressor. In addition, there is a certain height difference (i.e. 0-15mm) between the connecting tube and the convex ring, which provides a certain flexibility for the assembly process. This design helps to adapt to crankshafts of different sizes and shapes and reduce assembly difficulty and errors. The connecting tube is the main component for connecting the oil deflector cap to the crankshaft, and the appropriate increase in its height can enhance the strength of the overall structure. This helps to resist the vibration and impact generated by the compressor when it runs at high speed and extend the service life of the compressor. In the present application, the units of L, L0, L1, and L2 are all cm.

[0020] In a preferred technical solution of the present invention, a plurality of rivet holes are provided on the base plate, and the oil retaining cap is fixedly connected to the rotor of the compressor by rivets penetrating through the rivet holes.

[0021] The rivet connection ensures the connection stability between the oil deflector cap and the rotor, thereby extending the service life of the compressor.

[0022] The second object of the present invention is to provide a compressor, comprising a pump body assembly, a motor and the oil deflector cap as described above;

[0023] The pump body assembly includes a crankshaft, the motor includes a rotor, a shaft hole is provided in the rotor, and the oil retaining cap is fixed on one side of the rotor;

[0024] The crankshaft passes through the shaft hole and the connecting tube of the oil deflector cap, the outer diameter of the crankshaft is smaller than the inner diameter of the shaft hole, and the welding groove of the oil deflector cap of the crankshaft is welded and fixed.

[0025] Since the outer diameter of the crankshaft is smaller than the inner diameter of the shaft hole, this clearance fit can prevent the crankshaft from squeezing the rotor core and reduce the deformation of the rotor; and the clearance fit can improve the assembly accuracy and efficiency. At the same time, it also reduces the risk of compressor performance degradation or damage caused by improper assembly.

[0026] The oil deflector cap is welded to the crankshaft through a welding groove. This fixing method is more solid and reliable than the traditional interference fit. It can effectively prevent the rotor from shaking or deflecting during high-speed operation, improve the stability and balance of the rotor. In addition, because the deformation of the rotor is reduced, the noise and vibration generated by the compressor during operation will be greatly reduced.

[0027] In a preferred technical solution of the present invention, it also includes a balancing block, wherein the balancing block is provided with a plurality of blocks, the balancing block is arranged on one side of the oil deflector cap, and the balancing block is fixedly connected to the rotor.

[0028] In a preferred technical solution of the present invention, one end of the welding groove extends to the balancing block, and the balancing block is fixed to the welding groove of the oil deflector cap by welding. By welding the balancing block and the oil deflector cap into one piece, the rigidity and stability of the rotor as a whole can be enhanced. During the operation of the compressor, especially at high temperature or high speed, this welding connection can effectively reduce the deformation of the rotor caused by heat or uneven force, thereby maintaining the smooth operation of the compressor.

[0029] The balance weight is a key component used to balance the weight of the rotor and reduce vibration. Welding it to the oil deflector cap can ensure the stability and reliability of the balance weight during the operation of the rotor, thereby improving the overall balance of the rotor and reducing vibration and noise caused by imbalance.

[0030] The present application also provides a compressor, which includes a pump body assembly and a motor, wherein the pump body assembly includes a crankshaft, and the motor includes a rotor, wherein a shaft hole is provided in the rotor;

[0031] An oil deflector cap and a balancing block are provided on one side of the rotor, a connecting plate is provided on one side of the balancing block, and the connecting plate and the balancing block are integrally formed; a connecting cylinder is provided on the connecting plate, a connecting hole is provided in the connecting cylinder, and the diameter of the connecting hole is larger than the outer diameter of the crankshaft of the compressor; N welding grooves are provided on the connecting cylinder, and the welding grooves are welded and fixed to the crankshaft of the compressor.

[0032] A third object of the present invention is to provide a method for assembling a compressor, the method being implemented based on the compressor as described above;

[0033] The method comprises the following steps:

[0034] The oil deflector cap and the balancing block are fixed on one side of the rotor, wherein the balancing block is connected to a side wall of the oil deflector cap;

[0035] The crankshaft is passed through the shaft hole of the rotor and the connecting hole of the oil baffle cap, and the crankshaft and the welding groove on the oil baffle cap are welded and fixed by welding.

[0036] This assembly method fixes the oil deflector cap, the balance block and the crankshaft by welding, eliminating the complicated adjustment and tedious steps of interference fit in traditional assembly, helping to simplify the assembly process of the compressor and improving assembly efficiency.

[0037] Moreover, the welding connection is more stable and reliable than the traditional interference fit connection method. When the compressor is running at high speed, since the rotor is not deformed, the noise and vibration generated by the compressor during operation are reduced.

[0038] The beneficial effects of the present invention are:

[0039] The present invention provides an oil deflector cap, which includes a cap body, which is fixed on one side of the rotor of the compressor, a connecting cylinder is provided in the cap body, a connecting hole is provided in the connecting cylinder, and the diameter of the connecting hole is greater than the outer diameter of the crankshaft of the compressor; N welding grooves are provided on the connecting cylinder, and the welding grooves are welded and fixed to the crankshaft of the compressor, so that the oil deflector cap is fixed on the crankshaft of the compressor; N is a natural number greater than 1. In the traditional compressor assembly, the crankshaft usually needs to be interfered with the shaft hole of the rotor to ensure a tight connection, which often causes the rotor core to be deformed under stress. The present application is welded and fixed to the crankshaft by the welding groove on the oil deflector cap, and the oil deflector cap is fixedly connected to the rotor. This assembly method avoids the direct interference fit between the crankshaft and the shaft hole of the rotor, thereby significantly reducing the deformation of the rotor core. Reducing the deformation of the rotor core can effectively reduce the noise when the compressor is running, especially when it is running at high speed, and improve the user experience. In addition, by reducing the deformation of the rotor core, it helps to reduce the vibration of the compressor during operation and improve the stability and reliability of the compressor.

[0040] The present application also provides a compressor including the above-mentioned oil deflector cap and an assembly method of the compressor, which optimizes the overall structure of the compressor by introducing a specially designed oil deflector cap. The oil deflector cap not only plays the role of oil deflection, but also provides a stable support and fixing point for the crankshaft through the design of its connecting tube and welding groove, thereby enhancing the structural stability of the compressor. Moreover, the way the oil deflector cap is welded and fixed to the crankshaft makes it unnecessary for the crankshaft to have an interference fit with the shaft hole of the rotor, thereby reducing the deformation of the rotor, reducing the operating noise of the compressor, and improving the overall performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic structural diagram of an existing compressor provided in an embodiment of the present invention;

[0042] Figure 2 is an exploded view of a rotor assembly of a conventional compressor provided in an embodiment of the present invention;

[0043] Figure 3 is a three-dimensional diagram of an oil deflector cap provided in an embodiment of the present invention;

[0044] Figure 4 is a cross-sectional view of an oil deflector cap provided in an embodiment of the present invention;

[0045] Figure 5 is a schematic diagram of the internal structure of an improved compressor provided in an embodiment of the present invention;

[0046] Figure 6 is a schematic structural diagram of a rotor assembly including an improved oil deflector cap provided in an embodiment of the present invention and arranged on a compressor pump body;

[0047] Figure 7 is an exploded view of a rotor assembly including an improved oil deflector cap provided in an embodiment of the present invention;

[0048] Figure 8 is a flow chart of a compressor assembly method provided in an embodiment of the present invention;

[0049] Fig. 9 is an exploded view of the improved balancing weight and the rotor assembly provided in Embodiment 8 of the present invention;

[0050] Fig.10 It is a stereoscopic diagram of an improved integrated design of a balancing weight and a connecting plate provided in Example 8 of the present invention.

[0051] Reference numerals:

[0052] 1. Crankshaft; 2. Rotor; 21. Shaft hole; 3. Balance block; 4. Oil deflector cap; 41. Base plate; 42. Convex ring; 43. Connecting tube; 431. Welding groove; 432. Connecting hole; 44. Rivet hole; 5. Rivet. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0054] The pump assembly and the motor of a conventional compressor are often connected by an interference fit, that is, an interference fit between the crankshaft and the rotor shaft hole. Figure 4 As shown in the figure, the rotor assembly includes a balancing block, an oil deflector, a rotor, rivets, magnetic steel and other structures. The oil deflector is fixed to the rotor core by rivets, and there are many core slots in the rotor, accounting for more than 40% of the total area, resulting in a thin rotor contact shaft wall. The interference fit between the crankshaft and the rotor shaft hole, on the one hand, is easy to cause rotor deformation during the production process; on the other hand, when the compressor is running at high speed, due to the thin wall of the rotor, there is severe extrusion between the rotor and the crankshaft, which is easy to cause the rotor to be unstable during high-speed operation, resulting in abnormal noise and vibration of the compressor, which seriously affects the customer experience.

[0055] Based on this, the present application provides an oil deflector cap.

[0056] Example 1

[0057] like Figure 1-Figure 7 As shown, this embodiment provides an oil retaining cap, including a cap body, the cap body is fixed on one side of the rotor 2 of the compressor, a connecting cylinder 43 is provided in the cap body, a connecting hole 432 is provided in the connecting cylinder 43, and the diameter of the connecting hole 432 is larger than the outer diameter of the crankshaft 1 of the compressor; N welding grooves 431 are provided on the connecting cylinder 43, and the welding grooves 431 are welded and fixed to the crankshaft 1 of the compressor, so that the oil retaining cap 4 is fixed on the crankshaft 1 of the compressor; N is a natural number greater than 1. Specifically, the welding grooves 431 make the welds evenly distributed, thereby improving the stability and strength of the welding.

[0058] Specifically, a plurality of rivet holes 44 are provided on the base plate 41 of the oil deflector cap 4 , and the oil deflector cap 4 is fixedly connected to the rotor 2 of the compressor by rivets 5 penetrating the rivet holes 44 .

[0059] In one embodiment, 5 to 8 rivet holes 44 can be provided, and the plurality of rivet holes 44 are evenly distributed in a ring on the base plate 41, so that the rivet 5 passes through the rivet hole 44 and is fixedly connected to the rotor 2 of the compressor, and the rivet 5 can firmly lock the base plate 41 on the rotor 2 of the compressor, thereby realizing a firm locking of the oil deflector cap 4 and the rotor 2. The shape and size of the base plate 41 match one side of the compressor rotor 2 to ensure a tight fit and a firm fixation. In addition, the connecting tube 43 can be integral with the base plate 41, and then the welding groove 431 is machined on the connecting tube 43.

[0060] The connection between the oil deflector cap 4 and the rotor 2 is ensured to be stable by connecting with the rivets 5, thereby extending the service life of the compressor.

[0061] In traditional compressor assembly, the crankshaft 1 usually needs to have an interference fit with the shaft hole 21 of the rotor 2 to ensure a tight connection, which often causes the rotor 2 core to deform under stress. The present application is welded and fixed to the crankshaft 1 by the welding groove 431 on the oil deflector 4, and the diameter of the connecting hole 432 is larger than the outer diameter of the crankshaft 1 of the compressor. In this design, there is a clearance fit between the crankshaft 1 of the compressor and the shaft hole 21 of the rotor 2, avoiding a direct interference fit between the crankshaft 1 and the shaft hole 21 of the rotor 2, thereby avoiding deformation of the rotor 2 core caused by being squeezed by the crankshaft 1.

[0062] The deformation of the core of rotor 2 not only affects the performance of the compressor, but also causes additional noise during operation. Since the solution of the present application can reduce the deformation of the core of rotor 2, it can effectively reduce the noise during the operation of the compressor and improve the user experience. In addition, the deformation and imbalance of the core of rotor 2 are also one of the main causes of compressor vibration. By reducing the deformation of the core of rotor 2, the present application helps to reduce the vibration of the compressor and improve the stability and reliability of the compressor.

[0063] Example 2

[0064] like Figure 1-Figure 7 As shown, this embodiment is improved on the basis of embodiment 1.

[0065] In this embodiment, the oil deflector cap 4 for the compressor is further optimized to improve its structural stability and reliability during welding. Specifically:

[0066] The N welding grooves 431 are arranged on the connecting tube 43 along the circumferential direction of the connecting tube 43 , and the height direction of the welding grooves 431 is set along the axial direction of the connecting tube 43 .

[0067] The welding grooves 431 are arranged along the circumference of the connecting tube 43, which can ensure that the crankshaft 1 and the oil deflector cap 4 are evenly supported and fixed in multiple directions, thereby enhancing the connection stability between the oil deflector cap 4 and the crankshaft 1. This distributed welding method is more resistant to external forces than single-point or a few-point welding, thereby improving the reliability and durability of the connection.

[0068] Specifically, in this embodiment, N is 4, that is, four welding grooves 431 are arranged on the connecting tube 43 along its circumference, and the four welding grooves 431 are evenly distributed on the connecting tube 43 to ensure uniform distribution of thermal stress during welding and reduce welding deformation and cracks.

[0069] The height direction of the welding groove 431 is arranged along the axial direction of the connecting tube 43. This arrangement enables the weld to be formed along the axial direction of the connecting tube 43, increasing the length and depth of the weld, thereby improving the strength and sealing of the welding. In addition, the axial weld also helps to resist the radial and axial forces generated when the compressor is running, further enhancing the connection stability between the oil deflector cap 4 and the crankshaft 1.

[0070] Example 3

[0071] like Figure 1-Figure 7 As shown, this embodiment is improved on the basis of embodiment 1.

[0072] In this embodiment, the cap body includes a base plate 41 and a convex ring 42, wherein the convex ring 42 is disposed at the edge of the base plate 41, and the connecting tube 43 is disposed in the middle of the base plate 41;

[0073] The connecting tube 43 and the convex ring 42 both protrude outward from one side of the base plate 41 in the same protruding direction.

[0074] The design of the convex ring 42 increases the overall size and rigidity of the oil retaining cap 4, can effectively resist vibration and impact during the operation of the compressor, and reduce the risk of damage to the oil retaining cap 4. At the same time, the convex ring 42 can also enhance the sealing performance to a certain extent to prevent lubricating oil leakage. Moreover, the design of this cap body is relatively simple, and the connection and layout between the components are reasonable, which helps to simplify the manufacturing and processing process.

[0075] In the specific implementation process, the relative position relationship between the connecting tube 43 and the convex ring 42, the number and size of the welding grooves 431, etc. can be adjusted and optimized according to actual needs.

[0076] Example 4

[0077] like Figure 1-Figure 7 As shown, this embodiment is improved on the basis of embodiment 3.

[0078] In this embodiment, the length L of the welding groove 431 is (0.05-0.35)*L0, the width W of the welding groove 431 is 2mm-5mm, and the depth D of the welding groove 431 is 2mm-3mm;

[0079] Wherein L0 is the height of the rotor 2, the depth D of the weld refers to the depth of the weld groove 431 along the diameter direction of the connecting tube 43; the length L of the weld groove 431 refers to the depth of the weld groove 431 along the axial direction of the connecting tube 43; the width of the weld groove 431 refers to the width of the weld groove 431 along the circumferential direction of the connecting tube 43.

[0080] In this embodiment, the length L of the weld groove 431 is designed to be 0.05-0.35 times the height L0 of the rotor 2. This design takes into account the balance between welding stress and deformation, ensuring sufficient welding length to enhance the connection strength while avoiding increased welding stress and deformation due to the excessive length of the weld groove 431.

[0081] The width W of the welding groove 431 is set to 2 mm to 5 mm. This width range not only ensures sufficient welding seam area to withstand the force generated when the compressor is running, but also avoids the waste of welding materials and increased welding difficulty caused by the welding groove 431 being too wide.

[0082] The depth D of the welding groove 431 refers to the depth of the welding groove 431 along the diameter direction of the connecting tube 43, and the depth D is set to 2mm-3mm. An appropriate depth of the welding groove 431 helps to ensure sufficient fusion and penetration of the weld, and improve the strength and sealing of the welding.

[0083] The design of the welding groove 431 helps to control the deformation during welding. A welding groove 431 that is too long will increase welding stress and deformation and reduce welding efficiency; while a weld that is too short may affect the strength and stability of the connection. By reasonably designing the length of the weld, welding deformation can be minimized while ensuring the strength of the connection. The design of the welding groove 431 of this embodiment can reduce welding stress and deformation, reduce scrap rate and maintenance costs, and this embodiment helps to reduce overall production costs.

[0084] Example 5

[0085] like Figure 1-Figure 7 As shown, this embodiment is improved on the basis of embodiment 1.

[0086] In this embodiment, along the axial direction of the oil deflector cap 4, the height of the connecting tube 43 is L1, and the height of the convex ring 42 is L2, wherein L1=L2+0-15mm.

[0087] The present application can optimize the overall structural balance of the oil retaining cap 4 by adjusting the height difference (0-15mm) between the connecting tube 43 and the convex ring 42. This design helps to reduce the vibration and noise caused by the imbalance of the rotor 2 and improve the operating stability of the compressor.

[0088] In addition, there is a certain height difference between the connecting tube 43 and the convex ring 42, which provides a certain flexibility for the assembly process. This design helps to adapt to crankshafts 1 of different sizes and shapes, reducing assembly difficulty and errors. The connecting tube 43 is the main component for connecting the oil deflector cap 4 to the crankshaft 1, and its strength and stability are crucial to the connection stability between the crankshaft 1 and the oil deflector cap 4.

[0089] The proper increase in the height of the connecting tube 43 can enhance the strength of the overall structure, which helps to resist the vibration and impact generated when the compressor runs at high speed, and prolongs the service life of the compressor.

[0090] The height L2 of the protruding ring 42 matches the height L1 of the connecting tube 43, and the structural balance is optimized by adjusting the height difference between the two.

[0091] Example 6

[0092] like Figure 1-Figure 7 As shown, this embodiment provides a compressor, which includes a pump body assembly, a motor and the oil deflector cap 4 as described above;

[0093] The pump body assembly includes a crankshaft 1, the motor includes a rotor 2, a shaft hole 21 is provided in the rotor 2, and the oil deflector cap 4 is fixed on one side of the rotor 2;

[0094] The crankshaft 1 passes through the shaft hole 21 and the connecting tube 43 of the oil deflector cap 4. The outer diameter of the crankshaft 1 is smaller than the inner diameter of the shaft hole 21. The welding groove 431 of the oil deflector cap 4 of the crankshaft 1 is welded and fixed.

[0095] More specifically, the compressor of the present application includes a pump assembly, which is the core part of the compressor and includes a crankshaft 1 and a pump housing. The pump housing is used to accommodate the crankshaft 1 and other internal parts of the pump body, providing necessary support and protection, and the crankshaft 1 is used as a power transmission component. The motor also includes a stator, which is fixed in the compressor housing and provides an electromagnetic field to drive the rotor 2 to rotate.

[0096] The compressor also includes other additional components such as bearings, seals, lubricating oil system, etc., which work together to ensure the proper functioning of the compressor.

[0097] In the compressor provided by the present application, since the outer diameter of the crankshaft 1 is smaller than the inner diameter of the shaft hole 21, this clearance fit method can prevent the crankshaft 1 from squeezing the iron core of the rotor 2 and reduce the deformation of the rotor 2; and the clearance fit method can improve the accuracy and efficiency of assembly. At the same time, it also reduces the risk of compressor performance degradation or damage caused by improper assembly.

[0098] The oil deflector cap 4 is welded and fixed to the crankshaft 1 through the welding groove 431. This fixing method is more firm and reliable than the traditional interference fit, which can effectively prevent the rotor 2 from shaking or deflecting during high-speed operation and improve the stability and balance of the rotor 2. In addition, because the deformation of the rotor 2 is reduced, the noise and vibration generated by the compressor during operation will be greatly reduced.

[0099] Example 7

[0100] like Figure 1-Figure 7 As shown, this embodiment is improved on the basis of embodiment 6.

[0101] In this embodiment, a better implementation of the compressor is provided.

[0102] The compressor further includes a balancing block 3 , wherein the balancing block 3 includes a plurality of balancing blocks, the balancing block 3 is arranged on one side of the oil deflector cap 4 , and the balancing block 3 is fixedly connected to the rotor 2 .

[0103] The number and position of the balancing weights 3 are designed according to the specific structure and operation requirements of the rotor 2 to ensure the dynamic balance of the rotor 2 during operation. The balancing weights 3 are fixed to the rotor 2 by rivets 5 or other reliable connection methods to prevent loosening or falling off during high-speed operation. In this embodiment, one end of the welding groove 431 extends to the balancing weight 3, and the balancing weight 3 is welded and fixed to the welding groove 431 of the oil deflector cap 4.

[0104] By welding the balancing block 3 and the oil deflector cap 4 together, the overall rigidity and stability of the rotor 2 can be enhanced. During the operation of the compressor, especially when running at high temperature or high speed, this welding connection can effectively reduce the deformation of the rotor 2 caused by heat or uneven force, thereby maintaining the smooth operation of the compressor. The balancing block 3 is a key component for balancing the weight of the rotor 2 and reducing vibration. In this embodiment, the welding groove 431 is not only used for welding and fixing with the crankshaft 1, but also extends to the balancing block 3. Welding and fixing the balancing block 3 to the oil deflector cap 4 can ensure the stability and reliability of the balancing block 3 during the operation of the rotor 2, thereby improving the overall balance of the rotor 2 and reducing vibration and noise caused by imbalance.

[0105] Example 8

[0106] The difference between this embodiment and embodiments 1-7 is that the structure of the oil deflector cap is different. The oil deflector cap of this embodiment can be implemented by using an existing conventional oil deflector cap.

[0107] See also Fig. 9 , Fig.10 This embodiment provides a compressor, which includes a pump body assembly and a motor, wherein the pump body assembly includes a crankshaft 1, and the motor includes a rotor 2, wherein a shaft hole 21 is provided in the rotor 2;

[0108] An oil deflector cap and a balancing block 3 are provided on one side of the rotor 2, a connecting plate is provided on one side of the balancing block 3, and the connecting plate and the balancing block are integrally formed; a connecting cylinder 43 is provided on the connecting plate, a connecting hole 432 is provided in the connecting cylinder 43, and the diameter of the connecting hole 432 is larger than the outer diameter of the crankshaft 1 of the compressor; N welding grooves 431 are provided on the connecting cylinder 43, and the welding grooves 431 are welded and fixed to the crankshaft 1 of the compressor.

[0109] In this embodiment, the connecting plate and the balancing block are designed to be an integrated structure, and then the connecting tube 43 is arranged on the connecting plate, and the welding groove is opened on the connecting tube, and the welding groove is used to weld and fix the connecting tube to the crankshaft 1 of the compressor, and the balancing block is fixed to the rotor through a pin, so as to achieve a fixed connection between the rotor and the crankshaft. This design can reduce the deformation of the rotor 2.

[0110] Example 9

[0111] like Figure 1-Figure 8 As shown, this embodiment provides a method for assembling a compressor, and the method is implemented based on the compressor as described above;

[0112] The method comprises the following steps:

[0113] S100, fixing the oil deflector cap 4 and the balancing weight 3 on one side of the rotor 2, wherein the balancing weight 3 is connected to the side wall of the oil deflector cap 4;

[0114] During specific assembly, the oil deflector cap 4 is placed on one side of the rotor 2 and fixed to the rotor 2 by rivets 5 or other reliable connection methods. The balancing weight 3 is set on the base plate 41 of the oil deflector cap 4 and located between the connecting tube 43 and the convex ring 42, and fixedly connected to the rotor 2 by rivets 5 or other connection methods. Ensure that the balancing weight 3 is connected to the side wall of the oil deflector cap 4 for subsequent welding.

[0115] S200, the crankshaft 1 is passed through the shaft hole 21 of the rotor 2 and the connecting hole 432 of the oil deflector cap 4, and the crankshaft 1 is welded and fixed to the welding groove 431 on the oil deflector cap 4 by welding.

[0116] During specific assembly, the crankshaft 1 is made to pass through the shaft hole 21 of the rotor 2 and the connecting hole 432 of the oil deflector cap 4, ensuring that the matching clearance between the crankshaft 1, the rotor 2 and the oil deflector cap 4 is appropriate.

[0117] The crankshaft 1 is welded and fixed to the welding groove 431 on the oil deflector cap 4. During the welding process, parameters such as welding temperature, welding speed and welding pressure need to be controlled to ensure welding quality and weld strength.

[0118] The length, width and depth of the weld should be set according to the optimization plan to ensure the stability and reliability of the welded connection.

[0119] The assembly method fixes the oil deflector cap 4, the balancing block 3 and the crankshaft 1 by welding, eliminating the complicated adjustment and tedious steps of interference fit in traditional assembly, helping to simplify the assembly process of the compressor and improving assembly efficiency.

[0120] Moreover, the welding connection is more stable and reliable than the traditional interference fit connection mode. When the compressor is running at high speed, since the rotor 2 is not deformed, the noise and vibration generated by the compressor during operation are reduced.

[0121] This application will produce the compressor by welding the crankshaft 1 and the oil deflector 4. In the actual manufacturing process, the compressor prototype assembly off-line rate is reduced from 10% of the interference fit production method to 2%, and the outer diameter deformation of the rotor 2 is reduced from 0.02mm to 0.005mm. The off-line rate comparison is shown in the following table:

[0122] Conventional interference fit Welding assembly for this application Prototype offline rate 10％ 2％ Rotor outer diameter deformation 0.02mm 0.005mm

[0123] Moreover, after testing, the total noise value of the compressor 1.2K was reduced by 1-3dB at different frequencies.

[0124] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0125] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0126] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil retaining cap (4), comprising a cap body, wherein the cap body is fixed to one side of a rotor (2) of a compressor, and characterized in that: A connecting cylinder (43) is provided in the cap body, a connecting hole (432) is provided in the connecting cylinder (43), and the diameter of the connecting hole (432) is greater than the outer diameter of the crankshaft (1) of the compressor; N welding grooves (431) are provided on the connecting cylinder (43), and the welding grooves (431) are welded and fixed to the crankshaft (1) of the compressor, so that the oil deflector cap (4) is fixed on the crankshaft (1) of the compressor; N is a natural number greater than 1.

2. The oil deflector cap according to claim 1, characterized in that: N welding grooves (431) are arranged on the connecting tube (43) along the circumference of the connecting tube (43), and the height direction of the welding grooves (431) is set along the axial direction of the connecting tube (43).

3. The oil deflector cap according to claim 2, characterized in that: The cap body comprises a base plate (41) and a convex ring (42), wherein the convex ring (42) is arranged on the edge of the base plate (41), and the connecting tube (43) is arranged in the middle of the base plate (41); The connecting tube (43) and the convex ring (42) both protrude outward from one side of the base plate (41) and have the same protruding direction.

4. The oil deflector cap according to any one of claims 1 to 3, characterized in that: The length L of the welding groove (431) is (0.05-0.35)*L0, the width W of the welding groove (431) is 2mm-5mm, and the depth D of the welding groove (431) is 2mm-3mm; Wherein L0 is the height of the rotor (2), and the depth D of the weld refers to the depth of the weld groove (431) along the diameter direction of the connecting tube (43).

5. The oil deflector cap according to claim 3, characterized in that: Along the axial direction of the oil deflector cap (4), the height of the connecting tube (43) is L1, and the height of the convex ring (42) is L2, wherein L1=L2+0-15mm.

6. The oil deflector cap according to claim 3, characterized in that: The base plate (41) is provided with a plurality of rivet holes (44), and the oil deflector cap (4) is fixedly connected to the rotor (2) of the compressor by means of rivets (5) penetrating the rivet holes (44).

7. A compressor, characterized in that: It comprises a pump body assembly, a motor and an oil deflector cap as claimed in any one of claims 1 to 6; The pump body assembly comprises a crankshaft (1), the motor comprises a rotor (2), an axial hole (21) is provided in the rotor (2), and the oil deflector cap (4) is fixed on one side of the rotor (2); The crankshaft (1) passes through the shaft hole (21) and the connecting tube (43) of the oil deflector cap (4); the outer diameter of the crankshaft (1) is smaller than the inner diameter of the shaft hole (21); and the welding groove (431) of the oil deflector cap (4) of the crankshaft (1) is welded and fixed.

8. The compressor according to claim 7, characterized in that: It also includes a balancing block (3), wherein the balancing block (3) is provided with a plurality of blocks, the balancing block (3) is provided on one side of the oil deflector cap (4), and the balancing block (3) is fixedly connected to the rotor (2); One end of the welding groove (431) extends to the balancing block (3), and the balancing block (3) is fixedly welded to the welding groove (431) of the oil deflector cap (4).

9. A compressor, comprising a pump assembly and a motor, wherein the pump assembly comprises a crankshaft (1), the motor comprises a rotor (2), a shaft hole (21) is provided in the rotor (2), and the compressor is characterized in that: An oil deflector cap (4) and a balancing block (3) are provided on one side of the rotor (2); a connecting plate (31) is provided on one side of the balancing block (3); the connecting plate (31) and the balancing block are integrally formed; a connecting cylinder (43) is provided on the connecting plate (31); a connecting hole (432) is provided in the connecting cylinder (43); the diameter of the connecting hole (432) is greater than the outer diameter of the crankshaft (1) of the compressor; N welding grooves (431) are provided on the connecting cylinder (43); the welding grooves (431) are welded and fixed to the crankshaft (1) of the compressor.

10. A method for assembling a compressor, characterized in that: Implemented based on the compressor according to any one of claims 7 to 9; The method comprises the following steps: The oil deflector cap (4) and the balancing block (3) are fixed on one side of the rotor (2), wherein the balancing block (3) is connected to the side wall of the oil deflector cap (4); The crankshaft (1) is passed through the shaft hole (21) of the rotor (2) and the connecting hole (432) of the oil deflector cap (4), and the crankshaft (1) and the welding groove (431) on the oil deflector cap (4) are welded and fixed.

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