An oil baffle cap, a compressor, and a method for assembling the compressor.

Abstract

This invention provides an oil baffle cap, a compressor, and an assembly method for the compressor, belonging to the field of compressor technology. The oil baffle cap includes a cap body fixed to one side of the compressor rotor. A connecting cylinder is provided within the cap body, and a connecting hole is provided in the connecting cylinder. The diameter of the connecting hole is larger than the outer diameter of the compressor crankshaft. N welding grooves are provided on the connecting cylinder, and these grooves are welded and fixed to the compressor crankshaft, thus fixing the oil baffle cap to the compressor crankshaft; N is a natural number greater than 1. This oil baffle cap can be welded and fixed to the compressor crankshaft through the welding grooves. During assembly, the crankshaft does not need an interference fit with the rotor shaft hole, which effectively reduces the deformation of the rotor core, thereby reducing the noise and vibration of the compressor during operation.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to an oil baffle cap, a compressor, and a method for assembling the compressor. Background Technology

[0002] With economic development and accelerated industrialization, the market demand for air conditioning equipment, as a crucial tool for regulating indoor temperature, continues to grow. To meet market demands for efficient, energy-saving, and low-cost air conditioning equipment, the compressor, as a core component of air conditioning systems, has undergone continuous advancements and innovations in design and manufacturing technology. However, with the continuous rise in global energy costs, especially the significant increase in raw material prices, the home appliance industry faces enormous cost pressures. To reduce costs while maintaining product competitiveness, air conditioning manufacturers are actively seeking to miniaturize compressors. While miniaturized compressors can reduce the use of raw materials, lower production costs, and improve energy efficiency, miniaturization also brings a series of problems. For example, the miniaturized design reduces the strength of the compressor's shaft structure, making it prone to significant deformation during high-speed operation.

[0003] like Figures 1-2 As shown, traditional compressors often use an interference fit connection between the pump body assembly and the motor, specifically an interference fit between the crankshaft and the rotor shaft bore. The rotor assembly includes a balance block, oil baffle, rotor, rivets, magnets, and other structures. The oil baffle is fixed to the rotor core by rivets. The rotor core has numerous slots, accounting for over 40% of the total area, resulting in a thin contact wall surface. This interference fit between the crankshaft and rotor shaft bore can easily lead to rotor deformation during production. Furthermore, when the compressor operates at high speed, the thin rotor wall causes severe compression between the rotor and crankshaft, which can lead to rotor instability during high-speed operation, resulting in abnormal compressor noise and vibration, severely impacting customer experience.

[0004] Therefore, existing sandblasting equipment needs to be improved to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, one of the objectives of this invention is to provide an oil baffle cap that can be welded and fixed to the crankshaft of the compressor through a weld groove. During the assembly process, the crankshaft does not need to be interference-fitted with the shaft hole of the rotor, which can effectively reduce the deformation of the rotor core, thereby reducing the noise and vibration of the compressor during operation.

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

[0007] In traditional compressor assembly, the crankshaft typically requires an interference fit with the rotor's shaft bore to ensure a tight connection, which often leads to deformation of the rotor core under stress. This application addresses this by welding the crankshaft to the oil baffle cap via a weld groove, and by using a connection hole with a diameter larger than the compressor's crankshaft outer diameter. This avoids a direct interference fit between the crankshaft and the rotor shaft bore, significantly reducing rotor core deformation.

[0008] Rotor core deformation not only affects compressor performance but also causes additional noise during operation. Since the solution proposed in this application can reduce rotor core deformation, it can effectively reduce compressor operating noise and improve user experience. Furthermore, rotor core deformation and imbalance are also major causes of compressor vibration. By reducing rotor core deformation, this application helps reduce compressor vibration and improve compressor stability and reliability.

[0009] In a preferred embodiment of the present invention, N weld grooves are arranged circumferentially on the connecting cylinder, and the height direction of the weld grooves is set along the axial direction of the connecting cylinder.

[0010] The weld grooves are arranged circumferentially along the connecting cylinder, ensuring uniform support and fixation of the crankshaft and oil baffle in multiple directions, thus enhancing the stability of the connection between the oil baffle and the crankshaft. This distributed welding method is more resistant to external forces than single-point or a few-point welding, improving the reliability and durability of the connection.

[0011] The weld groove is positioned along the axis of the connecting cylinder, resulting in a longer weld seam and a larger weld area. This helps improve weld quality and ensures weld strength and sealing. Simultaneously, welding along the axis also helps reduce stress concentration during the welding process, lowering the risk of weld deformation and cracking.

[0012] In a preferred embodiment of the present invention, the cap body includes a base plate and a convex ring, the convex ring being disposed at the edge of the base plate, and the connecting cylinder being disposed at the middle of the base plate;

[0013] Both the connecting cylinder and the convex ring protrude outward from one side of the substrate, and the protrusion directions are the same.

[0014] The raised ring positioned at the edge of the base plate increases the overall size and rigidity of the oil baffle cap, helping to reduce damage caused by vibration or impact and improving the operating stability of the compressor. Furthermore, this cap design is relatively simple, with rational connections and layouts between components, which helps simplify the manufacturing and processing process.

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

[0016] Where 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 cylinder.

[0017] The design of the weld groove helps control deformation during the welding process. An excessively long weld groove increases welding stress and deformation, reducing welding efficiency; while an excessively short weld may affect the strength and stability of the connection. By designing a reasonable weld length, welding deformation can be minimized while ensuring connection strength.

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

[0019] This application optimizes the overall structural balance of the oil baffle cap by adjusting the height difference (0-15mm) between the connecting cylinder and the convex ring. This design helps reduce vibration and noise caused by imbalance, improving the operating stability of the compressor. Furthermore, the 0-15mm height difference between the connecting cylinder and the convex ring provides flexibility in the assembly process. This design helps accommodate crankshafts of different sizes and shapes, reducing assembly difficulty and errors. As the main component connecting the oil baffle cap to the crankshaft, appropriately increasing the height of the connecting cylinder enhances the overall structural strength. This helps resist vibration and impact generated during high-speed compressor operation, extending the compressor's service life. In this application, L, L0, L1, and L2 are all in cm.

[0020] In a preferred embodiment of the present invention, the substrate is provided with a plurality of rivet holes, and the oil baffle is fixedly connected to the rotor of the compressor by rivets passing through the rivet holes.

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

[0022] A second objective of this invention is to provide a compressor, including a pump body assembly, a motor, and an oil baffle cap as described above;

[0023] The pump body assembly includes a crankshaft, the motor includes a rotor, the rotor has a shaft hole, and the oil baffle is fixed to one side of the rotor;

[0024] The crankshaft passes through the shaft hole and the connecting cylinder of the oil baffle cap. The outer diameter of the crankshaft is smaller than the inner diameter of the shaft hole. The oil baffle cap of the crankshaft is welded and fixed.

[0025] Because the outer diameter of the crankshaft is smaller than the inner diameter of the shaft bore, this clearance fit prevents the crankshaft from squeezing the rotor's core, reducing rotor deformation. Furthermore, the clearance fit improves assembly precision and efficiency. It also reduces the risk of compressor performance degradation or damage due to improper assembly.

[0026] The oil baffle cap is welded to the crankshaft via a weld groove. This fixing method is more robust and reliable than the traditional interference fit, effectively preventing the rotor from shaking or shifting during high-speed operation, thus improving the rotor's stability and balance. Furthermore, the reduced rotor deformation significantly reduces the noise and vibration generated by the compressor during operation.

[0027] In a preferred embodiment of the present invention, a balance block is further included. Several balance blocks are provided, and the balance blocks are disposed on one side of the oil baffle cap and are fixedly connected to the rotor.

[0028] In a preferred embodiment of the present invention, one end of the weld groove extends to the balance block, and the balance block is welded and fixed to the weld groove of the oil baffle cap. By welding the balance block and the oil baffle cap together, the overall rigidity and stability of the rotor can be enhanced. During compressor operation, especially at high temperatures or high speeds, this welded connection can effectively reduce rotor deformation caused by uneven heating or stress, thereby maintaining stable compressor operation.

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

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

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

[0032] A third objective of this invention is to provide a method for assembling a compressor, which is based on the compressor described above.

[0033] The method includes the following steps:

[0034] The oil baffle and balance block are fixed to one side of the rotor, wherein the balance block is in contact with one side wall of the oil baffle.

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

[0036] This assembly method fixes the oil baffle, balance block and crankshaft together by welding, eliminating the complicated adjustment and interference fit steps in traditional assembly, which helps to simplify the compressor assembly process and improve assembly efficiency.

[0037] Furthermore, welded connections are more robust and reliable than traditional interference fit connections. When the compressor is running at high speed, the rotor remains undeformed, reducing noise and vibration during operation.

[0038] The beneficial effects of this invention are as follows:

[0039] This invention provides an oil baffle cap, comprising a cap body fixed to one side of the compressor rotor. A connecting cylinder is disposed within the cap body, and a connecting hole is provided in the connecting cylinder. The diameter of the connecting hole is larger than the outer diameter of the compressor crankshaft. The connecting cylinder has N welding grooves, which are welded and fixed to the compressor crankshaft, thus fixing the oil baffle cap to the compressor crankshaft; N is a natural number greater than 1. In traditional compressor assembly, the crankshaft usually requires an interference fit with the rotor shaft hole to ensure a tight connection, which often leads to deformation of the rotor core under stress. This application fixes the oil baffle cap to the crankshaft by welding the welding grooves on the oil baffle cap, and the oil baffle cap is fixedly connected to the rotor. This assembly method avoids a direct interference fit between the crankshaft and the rotor shaft hole, thereby significantly reducing rotor core deformation. Reducing rotor core deformation effectively reduces compressor noise during operation, especially at high speeds, improving the user experience. Furthermore, reducing rotor core deformation helps reduce compressor vibration during operation, improving the compressor's stability and reliability.

[0040] This application also provides a compressor including the aforementioned oil baffle cap and an assembly method for the compressor. By introducing a specially designed oil baffle cap, the overall structure of the compressor is optimized. The oil baffle cap not only serves to block oil but also, through its connecting sleeve and welded groove design, provides a stable support and fixing point for the crankshaft, enhancing the structural stability of the compressor. Furthermore, the welding fixation method between the oil baffle cap and the crankshaft eliminates the need for an interference fit between the crankshaft and the rotor's shaft bore, thus reducing rotor deformation, lowering compressor operating noise, and improving the overall performance of the compressor. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of a conventional compressor provided in an embodiment of the present invention;

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

[0043] Figure 3 This is a perspective view of the oil-blocking cap provided in an embodiment of the present invention;

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

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

[0046] Figure 6 This is a schematic diagram of the rotor assembly including the improved oil baffle cap installed on the compressor pump body according to an embodiment of the present invention;

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

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

[0049] Figure 9 This is an exploded view of the rotor assembly including the improved balance block provided in embodiment 8 of the present invention;

[0050] Figure 10 This is a perspective view of embodiment 8 of the present invention, which includes an improved integrated design of the balance block and connecting plate.

[0051] Figure label:

[0052] 1. Crankshaft; 2. Rotor; 21. Shaft hole; 3. Balance block; 4. Oil baffle cap; 41. Base plate; 42. Convex ring; 43. Connecting cylinder; 431. Weld groove; 432. Connecting hole; 44. Rivet hole; 5. Rivet. Detailed Implementation

[0053] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0054] Traditional compressors often use an interference fit connection between the pump body assembly and the motor, that is, an interference fit between the crankshaft and the rotor shaft bore. For example... Figure 4 As shown, the rotor assembly includes a balance block, oil baffle, rotor, rivets, magnets, and other structures. The oil baffle is fixed to the rotor core by rivets. The rotor core has numerous slots, accounting for over 40% of the total area, resulting in a thin rotor contact shaft wall. The interference fit between the crankshaft and rotor shaft bores can easily lead to rotor deformation during production. Furthermore, when the compressor operates at high speed, the thin rotor wall causes severe compression between the rotor and crankshaft, which can lead to rotor instability during high-speed operation, resulting in abnormal compressor noise and vibration, severely impacting customer experience.

[0055] Based on this, this application provides an oil baffle cap.

[0056] Example 1

[0057] like Figures 1-7 As shown, this embodiment provides an oil baffle cap, including a cap body fixed to one side of the compressor rotor 2. A connecting cylinder 43 is provided within the cap body, and a connecting hole 432 is provided in the connecting cylinder 43. The diameter of the connecting hole 432 is larger than the outer diameter of the compressor crankshaft 1. N welding grooves 431 are provided on the connecting cylinder 43, and the welding grooves 431 are welded and fixed to the compressor crankshaft 1, thus fixing the oil baffle cap 4 to the compressor crankshaft 1; N is a natural number greater than 1. Specifically, the welding grooves 431 ensure a uniform distribution of the weld seam, thereby improving the stability and strength of the weld.

[0058] Specifically, the base plate 41 of the oil baffle cap 4 is provided with a plurality of rivet holes 44, and the oil baffle cap 4 is fixedly connected to the rotor 2 of the compressor by rivets 5 passing through the rivet holes 44.

[0059] In one embodiment, 5-8 rivet holes 44 can be provided, with multiple rivet holes 44 evenly distributed in a ring on the base plate 41, so that the rivet 5 passes through the rivet holes 44 and is fixedly connected to the compressor rotor 2. The rivet 5 can firmly lock the base plate 41 to the compressor rotor 2, thereby achieving a firm lock between the oil baffle 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 firm fixation. In addition, the connecting cylinder 43 can be integral with the base plate 41, and the weld groove 431 is machined into the connecting cylinder 43.

[0060] The connection between the oil baffle cap 4 and the rotor 2 is ensured by the rivet 5, thereby extending the service life of the compressor.

[0061] In traditional compressor assembly, the crankshaft 1 typically requires an interference fit with the shaft hole 21 of the rotor 2 to ensure a tight connection, which often leads to deformation of the rotor 2 core under stress. In this application, the crankshaft 1 is welded to the oil baffle cap 4 via a weld groove 431, and the diameter of the connecting hole 432 is larger than the outer diameter of the compressor crankshaft 1. In this design, the crankshaft 1 and the shaft hole 21 of the rotor 2 have a clearance fit, avoiding a direct interference fit between the crankshaft 1 and the shaft hole 21 of the rotor 2, thus preventing deformation of the rotor 2 core caused by pressure from the crankshaft 1.

[0062] Deformation of the rotor core 2 not only affects compressor performance but also causes additional noise during operation. Since the solution proposed in this application can reduce rotor core deformation, it can effectively reduce compressor operating noise and improve user experience. Furthermore, rotor core deformation and imbalance are also major causes of compressor vibration. By reducing rotor core deformation, this application helps reduce compressor vibration and improve compressor stability and reliability.

[0063] Example 2

[0064] like Figures 1-7 As shown, this embodiment is an improvement on embodiment 1.

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

[0066] N weld grooves 431 are arranged circumferentially on the connecting cylinder 43, and the height direction of the weld grooves 431 is set along the axial direction of the connecting cylinder 43.

[0067] The weld groove 431 is arranged circumferentially along the connecting cylinder 43, which ensures that the crankshaft 1 and the oil baffle cap 4 are uniformly supported and fixed in multiple directions, enhancing the connection stability between the oil baffle cap 4 and the crankshaft 1. This distributed welding method is more resistant to external forces than single-point or a few-point welding, improving the reliability and durability of the connection.

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

[0069] The weld groove 431 is positioned along the axial direction of the connecting cylinder 43. This arrangement allows the weld to form along the axial direction of the connecting cylinder 43, increasing the length and depth of the weld and thus improving the weld strength and sealing performance. Furthermore, the axial weld helps resist the radial and axial forces generated during compressor operation, further enhancing the connection stability between the oil baffle cap 4 and the crankshaft 1.

[0070] Example 3

[0071] like Figures 1-7 As shown, this embodiment is an improvement on embodiment 1.

[0072] In this embodiment, the cap body includes a base plate 41 and a protruding ring 42, the protruding ring 42 is disposed on the edge of the base plate 41, and the connecting cylinder 43 is disposed in the middle of the base plate 41;

[0073] Both the connecting cylinder 43 and the convex ring 42 protrude outward from one side of the base plate 41, and the protrusion directions are the same.

[0074] The design of the raised ring 42 increases the overall size and rigidity of the oil baffle cap 4, effectively resisting vibration and impact during compressor operation and reducing the risk of damage to the oil baffle cap 4. At the same time, the raised ring 42 also enhances sealing to a certain extent, preventing lubricating oil leakage. Furthermore, this cap design is relatively simple, with reasonable connections and layouts between components, which helps simplify the manufacturing and processing process.

[0075] In the actual implementation process, the relative positional relationship between the connecting cylinder 43 and the convex ring 42, the number and size of the weld groove 431, etc. can be adjusted and optimized according to actual needs.

[0076] Example 4

[0077] like Figures 1-7 As shown, this embodiment is an improvement on embodiment 3.

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

[0079] Where L0 is the height of rotor 2, the depth D of weld refers to the depth of weld groove 431 along the diameter direction of connecting cylinder 43, the length L of weld groove 431 refers to the depth of weld groove 431 along the axis direction of connecting cylinder 43, and the width of weld groove 431 refers to the width of weld groove 431 along the circumference of connecting cylinder 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 connection strength, while avoiding increased welding stress and deformation due to excessive length of the weld groove 431.

[0081] The width W of the weld groove 431 is set to 2mm-5mm. This width range ensures sufficient weld area to withstand the force generated when the compressor is running, while avoiding waste of welding materials and increased welding difficulty due to an excessively wide weld groove 431.

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

[0083] The design of the weld groove 431 helps control deformation during the welding process. An excessively long weld groove 431 increases welding stress and deformation, reducing welding efficiency; while an excessively short weld may affect the strength and stability of the connection. Through a reasonable weld length design, welding deformation can be minimized while ensuring connection strength. The weld groove 431 design in this embodiment reduces welding stress and deformation, lowers scrap rate and maintenance costs, and contributes to reducing overall production costs.

[0084] Example 5

[0085] like Figures 1-7 As shown, this embodiment is an improvement on embodiment 1.

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

[0087] This application optimizes the overall structural balance of the oil baffle cap 4 by adjusting the height difference (0-15mm) between the connecting cylinder 43 and the convex ring 42. This design helps reduce vibration and noise caused by rotor 2 imbalance and improves the operating stability of the compressor.

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

[0089] Appropriately increasing the height of the connecting cylinder 43 can enhance the overall structural strength. This helps to resist the vibrations and impacts generated when the compressor is running at high speed, thus extending the compressor's service life.

[0090] The height L2 of the convex ring 42 is matched with the height L1 of the connecting cylinder 43, and the structural balance is optimized by adjusting the height difference between the two.

[0091] Example 6

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

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

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

[0095] More specifically, the compressor of this application includes a pump body assembly, which is the core part of the compressor and includes a crankshaft 1 and a pump body housing. The pump body housing houses the crankshaft 1 and other internal pump parts, providing necessary support and protection. The crankshaft 1 serves as the power transmission component. The motor also includes a stator, which is fixedly mounted inside 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, and lubrication systems, which work together to ensure the compressor operates normally.

[0097] In the compressor provided in this application, since the outer diameter of the crankshaft 1 is smaller than the inner diameter of the shaft hole 21, this clearance fit can prevent the crankshaft 1 from squeezing the iron core of the rotor 2, reducing the deformation of the rotor 2; moreover, 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 due to improper assembly.

[0098] The oil baffle cap 4 is welded to the crankshaft 1 via a weld groove 431. This fixing method is more robust and reliable than the traditional interference fit, effectively preventing the rotor 2 from shaking or shifting during high-speed operation, thus improving the stability and balance of the rotor 2. Furthermore, the reduced deformation of the rotor 2 significantly reduces the noise and vibration generated by the compressor during operation.

[0099] Example 7

[0100] like Figures 1-7 As shown, this embodiment is an improvement on embodiment 6.

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

[0102] The compressor also includes a balance block 3, which consists of several blocks. The balance block 3 is located on one side of the oil baffle cap 4 and is fixedly connected to the rotor 2.

[0103] The number and position of the balance blocks 3 are designed according to the specific structure and operating requirements of the rotor 2 to ensure the dynamic balance of the rotor 2 during operation. The balance blocks 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 weld groove 431 extends to the balance block 3, and the balance block 3 is welded and fixed to the weld groove 431 of the oil baffle cap 4.

[0104] By welding the balance block 3 to the oil baffle cap 4 as a single unit, the overall rigidity and stability of the rotor 2 can be enhanced. During compressor operation, especially at high temperatures or high speeds, this welded connection can effectively reduce deformation of the rotor 2 caused by uneven heating or stress, thereby maintaining stable compressor operation. The balance block 3 is a key component used to balance the weight of the rotor 2 and reduce vibration. In this embodiment, the weld groove 431 is not only used for welding and fixing to the crankshaft 1, but also extends to the balance block 3. Welding and fixing the balance block 3 to the oil baffle cap 4 can ensure the stability and reliability of the balance block 3 during rotor 2 operation, 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 the structure of the oil baffle cap. The oil baffle cap in this embodiment can be implemented using existing conventional oil baffle caps.

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

[0108] An oil baffle and a balance block 3 are provided on one side of the rotor 2. A connecting plate is provided on one side of the balance block 3. The connecting plate and the balance 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. 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. The welding grooves 431 are welded and fixed to the crankshaft 1 of the compressor.

[0109] In this embodiment, the connecting plate and the balance block are designed as an integral structure. The connecting cylinder 43 is then placed on the connecting plate, and a weld groove is formed on the connecting cylinder. The cylinder is welded and fixed to the crankshaft 1 of the compressor through the weld groove. The balance block is fixed to the rotor by pins, thereby achieving a fixed connection between the rotor and the crankshaft. This design can reduce the deformation of the rotor 2.

[0110] Example 9

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

[0112] The method includes the following steps:

[0113] S100. Fix the oil baffle cap 4 and the balance block 3 to one side of the rotor 2, wherein the balance block 3 is in contact with the side wall of the oil baffle cap 4.

[0114] During assembly, the oil baffle 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 balance block 3 is placed on the base plate 41 of the oil baffle cap 4, located between the connecting cylinder 43 and the convex ring 42, and fixed to the rotor 2 by rivets 5 or other connection methods. Ensure that the balance block 3 is in contact with the side wall of the oil baffle cap 4 for subsequent welding.

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

[0116] During specific assembly, the crankshaft 1 passes through the shaft hole 21 of the rotor 2 and the connecting hole 432 of the oil baffle 4 to ensure that the fit clearance between the crankshaft 1, the rotor 2 and the oil baffle 4 is appropriate.

[0117] The crankshaft 1 is welded to the weld groove 431 on the oil baffle 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 optimized plan to ensure the stability and reliability of the welded connection.

[0119] This assembly method fixes the oil baffle cap 4, balance block 3 and crankshaft 1 together by welding, eliminating the complicated adjustment and interference fit steps in traditional assembly, which helps to simplify the compressor assembly process and improve assembly efficiency.

[0120] Furthermore, welded connections are more robust and reliable than traditional interference fit connections. When the compressor is running at high speed, the absence of deformation in rotor 2 reduces noise and vibration generated during operation.

[0121] This application describes the production of the compressor via welding the crankshaft 1 to the oil baffle cap 4. In the actual manufacturing process, the compressor prototype assembly yield rate was reduced from 10% using the interference fit production method to 2%, and the outer diameter deformation of the rotor 2 was reduced from 0.02mm to 0.005mm. The yield rate comparison is shown in the table below:

[0122] Conventional interference fit The welding assembly of this application Prototype rollout rate 10％ 2％ Rotor outer diameter deformation 0.02mm 0.005mm

[0123] Furthermore, tests showed that the total noise level of the compressor at 1.2K was reduced by 1-3dB at different frequencies.

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

[0125] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0126] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A compressor characterized by: This includes the pump body assembly, motor, and oil baffle cap; The oil baffle cap (4) includes a cap body, which is fixed to one side of the compressor rotor (2). The oil baffle cap (4) is fixedly connected to the compressor rotor (2). Its characteristic is that: The cap body is provided with a connecting cylinder (43), and the connecting cylinder (43) is provided with a connecting hole (432). The diameter of the connecting hole (432) is larger than the outer diameter of the crankshaft (1) of the compressor. The connecting cylinder (43) is provided with N welding grooves (431), and the welding grooves (431) are welded and fixed to the crankshaft (1) of the compressor, so that the oil baffle cap (4) is fixed on the crankshaft (1) of the compressor. N is a natural number greater than 1. The pump body assembly includes a crankshaft (1), the motor includes a rotor (2), the rotor (2) is provided with a shaft hole (21), and the oil baffle (4) is fixed to one side of the rotor (2); The crankshaft (1) passes through the shaft hole (21) and the connecting sleeve (43) of the oil baffle cap (4). The outer diameter of the crankshaft (1) is smaller than the inner diameter of the shaft hole (21). The oil baffle cap (4) of the crankshaft (1) is welded and fixed in the weld groove (431). N weld grooves (431) are arranged circumferentially on the connecting cylinder (43), and the height direction of the weld grooves (431) is set along the axial direction of the connecting cylinder (43). The length L of the weld groove (431) is (0.05-0.35)*L0, the width W of the weld groove (431) is 2mm-5mm, and the depth D of the weld groove (431) is 2mm-3mm. Where 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 cylinder (43).

2. The compressor according to claim 1, characterized in that: It also includes a balance block (3), which is provided in several blocks. The balance block (3) is located on one side of the oil baffle cap (4) and is fixedly connected to the rotor (2). One end of the weld groove (431) extends to the balance block (3), and the balance block (3) is welded and fixed to the weld groove (431) of the oil baffle cap (4).

3. The compressor of claim 1, wherein: The cap body includes a base plate (41) and a protruding ring (42), the protruding ring (42) being disposed on the edge of the base plate (41), and the connecting cylinder (43) being disposed in the middle of the base plate (41); The connecting cylinder (43) and the protruding ring (42) both protrude outward from one side of the substrate (41), and the protrusion directions are the same.

4. The compressor of claim 3, wherein: Along the axial direction of the oil baffle cap (4), the height of the connecting cylinder (43) is L1, and the height of the convex ring (42) is L2, where L1 = L2 + [0-15mm].

5. The compressor according to claim 3, characterized in that: The substrate (41) is provided with a plurality of rivet holes (44), and the oil baffle cap (4) is fixedly connected to the compressor rotor (2) by rivets (5) passing through the rivet holes (44).

6. A method for assembling a compressor, characterized in that: Implemented based on the compressor as described in any one of claims 1-2; The method includes the following steps: The oil baffle cap (4) and the balance block (3) are fixed on one side of the rotor (2), wherein the balance block (3) is in contact with the side wall of the oil baffle cap (4); The crankshaft (1) passes through the shaft hole (21) of the rotor (2) and the connecting hole (432) of the oil baffle (4), and the crankshaft (1) is welded to the weld groove (431) on the oil baffle (4) by welding.

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