Compressor and processing technology

Abstract

The invention relates to the technical field of compressors, and provides a compressor and a machining process, a shell is columnar and comprises a first area, a second area and a third area in the axial direction, the inner diameter D1 of the first area meets the condition that D1 is larger than D2, and the inner diameter D3 of the third area meets the condition that D3 is larger than D2; the motor is installed in the shell and comprises a stator, the stator and the shell are fixed in the second area, in the axial direction of the shell, the stacked height length of the stator is Lfixed, the condition that Lfixed is larger than L2, L2 is the axial size of the second area, and in the radial projection of the shell, the stator partially coincides with the first area and the third area is met; the second area comprises a welding section, and the stator and the shell are fixed on the welding section in a laser welding mode. In this way, the connection stability of the shell and the motor can be enhanced, the performance of the motor can be optimized, and noise and vibration can be reduced when the compressor is started.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor and a processing technology thereof. Background Art

[0002] In existing compressor technology, the inner diameter of the shell is usually a single size. This design cannot meet the diverse needs of the compressor for the matching of the shell and the motor under different working conditions. For example, when operating at high frequencies or under complex stresses, the traditional single inner diameter shell is difficult to effectively optimize the matching between the motor and the shell, resulting in deficiencies in connection strength, stability, and noise control. At the same time, it is also impossible to give full play to the advantages of the interference fit and laser welding connection structure, limiting the improvement of the overall noise of the compressor. At the same time, severe electromagnetic noise will be generated during high-frequency operation (such as the electronic control switching frequency of 6250Hz), and there is a lack of effective solutions.

[0003] Therefore, a compressor and a processing technology are urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0004] The object of the present invention is to provide a compressor and a processing technology, which can enhance the connection strength between the housing and the motor, thereby reducing the noise and vibration generated when the compressor is running.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Compressor, including:

[0007] The shell is cylindrical and includes a first area, a second area and a third area along the axial direction. The inner diameter D of the first area 1 satisfy,

[0008] D 1 >D 2 , the inner diameter D of the third region 3 Satisfied, D 3 >D 2 ;

[0009] The motor is installed in the housing, and the motor includes a stator. The stator and the housing are fixed in the second region. In the axial direction of the housing, the stack height length L of the stator is 定 , meet,L 定 >L 2 , L 2 is the axial dimension of the second region, and in the radial projection of the housing, the stator partially overlaps with the first region and the third region;

[0010] The second region includes a welding section, and the stator and the housing are fixed to each other in the welding section by laser welding.

[0011] As a preferred technical solution of the above compressor, the inner diameter D of the above first area 1 Satisfied, 0mm<D 1 -D 2 ≤2mm.

[0012] As a preferred technical solution of the above compressor, the inner diameter D of the above third region 3 Satisfied, 0mm<D 3 -D 2 ≤2mm.

[0013] As a preferred technical solution of the above compressor, the axial length L of the above first region 1 Satisfy, 0.1≤L 2 / L 1 ≤0.3.

[0014] As a preferred technical solution of the above compressor, the axial length L of the above third region is 3 Satisfy, 0.1≤L 2 / L 3 ≤0.3.

[0015] As a preferred technical solution of the above compressor, a first transition surface is formed between the above first area and the above second area in the above axial direction, and the length L of the above first transition surface is 过度1 Satisfied, 5mm≤L 过度1 ≤10mm, and the first transition surface is a circular arc surface;

[0016] And / or, in the axial direction, a second transition surface is formed between the third region and the second region, and the length L of the second transition surface is 过度2 Satisfied, 5mm≤L 过度2 ≤10mm, and the second transition surface is a circular arc surface.

[0017] As a preferred technical solution of the above compressor, the length L of the above welding section in the above axial direction 焊 Satisfy, 0.4≤L 焊 / L 定 ≤0.8.

[0018] As a preferred technical solution of the compressor, the second region further includes a first blank section and a second blank section. In the axial direction, the first blank section and the second blank section are respectively located at the two ends of the welding section. The length L of the welding section 焊 Satisfied, 0mm≤L 2 -L 焊 ≤10mm, and the length of the first blank section L 留白1 Satisfied, 0mm≤L留白1 ≤5mm, the length of the second blank section L 留白2 Satisfied, 0mm≤L 留白2 ≤5mm.

[0019] As a preferred technical solution of the above compressor, the above stator and the above second region are interference fit, and the interference amount is -0.1mm to 0.1mm.

[0020] A processing technology is also provided, which is applicable to the above compressor, comprising:

[0021] S1, make the inner diameter D 2 The blank of the above-mentioned shell;

[0022] S2, the shell with an inner diameter of D2 is enlarged from the head and tail ends to the middle part in the axial direction to form the second area with an inner diameter of D2, the first area with an inner diameter of D1 and the third area with an inner diameter of D3, D1>D2, D3>D2;

[0023] S3, installing the stator in the housing;

[0024] S4. Perform laser welding to fix the stator to the housing.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a compressor, comprising a housing and a motor. The housing is cylindrical and includes a first region, a second region and a third region along the axial direction. The inner diameter D of the first region is 1 Satisfied, D 1 >D 2 , the inner diameter D of the third area 3 Satisfied, D 3 >D 2 The motor is installed in the housing, and the motor includes a stator. The stator and the housing are fixed in the second area. In the axial direction of the housing, the stack height length L of the stator is 定 , meet,L 定 >L 2 , L 2 is the axial dimension of the second area, and in the radial projection of the shell, the stator partially overlaps with the first area and the third area; the second area includes a welding section, and the stator and the shell are fixed to the welding section by laser welding.

[0027] In this way, the housing is divided into the first area, the second area and the third area along its axial direction, and the first area and the second area, the third area and the second area are all variable diameter designs, so that the housing and the motor form a precise matching relationship in different areas, effectively disperse the stress, improve the bearing capacity of the connection part, enhance the stability of the compressor during operation, and reduce the risk of failure caused by loose connection or deformation. Furthermore, the inner diameter value of the housing includes D 1 , D 2 and D 3 The non-uniform inner diameter structure can improve the magnetic circuit and heat conduction path around the motor according to the motor magnetic field distribution and heat dissipation requirements. 2 The middle area provides stable support and a good magnetic permeability environment for the motor, which helps to improve the motor efficiency; the first and third areas can promote heat dissipation to a certain extent, reduce the temperature rise of the motor, thereby improving the overall performance of the motor and extending the service life of the motor. Furthermore, at high-frequency operation, such as the electronic control switching frequency of 6250Hz, the inner diameter structure of the shell can change the vibration propagation path and frequency response characteristics. Through the optimized stiffness distribution and matching clearance design, the transmission and amplification of vibration are effectively suppressed, the electromagnetic noise and mechanical vibration generated by the compressor are reduced, and the acoustic performance and comfort of the product are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0029] Figure 1 is a schematic structural diagram of a compressor provided by an embodiment of the present invention;

[0030] Figure 2 is a partial enlarged view of the second area provided by an embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the processing technology provided by an embodiment of the present invention.

[0032] In the figure:

[0033] 100, housing; 110, first region; 120, second region; 130, third region; 210, stator. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] like Figure 1 and Figure 2 As shown, the present invention provides a compressor, including a housing 100 and a motor. The housing 100 is cylindrical, and includes a first area 110, a second area 120 and a third area 130 along the axial direction. The inner diameter D of the first area 110 is 1 Satisfied, D 1 >D 2 , the inner diameter D of the third region 130 3 Satisfied, D 3 >D 2The motor is installed in the housing 100, and the motor includes a stator 210. The stator 210 and the housing 100 are fixed in the second region 120. In the axial direction of the housing 100, the stack height length L of the stator 210 定 , meet,L 定 >L 2 , L 2 is the axial dimension of the second region 120 , and in the radial projection of the housing 100 , the stator 210 partially overlaps with the first region 110 and the third region 130 ; the second region 120 includes a welding section, and the stator 210 and the housing 100 are fixed in the welding section by laser welding.

[0039] In this way, the housing 100 is divided into a first area 110, a second area 120 and a third area 130 along its axial direction, and the first area 110 and the second area 120, and the third area 130 and the second area 120 are all designed with variable diameters, so that the housing 100 and the motor form a precise matching relationship in different areas, effectively disperse stress, improve the bearing capacity of the connection part, enhance the stability of the compressor during operation, and reduce the risk of failure caused by loose connection or deformation. Further, the inner diameter value of the housing 100 includes D 1 , D 2 and D 3 The non-uniform inner diameter structure can improve the magnetic circuit and heat conduction path around the motor according to the motor magnetic field distribution and heat dissipation requirements. 2 The middle area provides stable support and a good magnetic permeability environment for the motor, which helps to improve the efficiency of the motor; the first area 110 and the third area 130 can promote heat dissipation to a certain extent, reduce the temperature rise of the motor, thereby improving the overall performance of the motor and extending the service life of the motor. Furthermore, at high-frequency operation, such as when the electric control switching frequency is 6250Hz, the inner diameter structure of the shell 100 can change the vibration propagation path and frequency response characteristics. Through the optimized stiffness distribution and matching clearance design, the transmission and amplification of vibrations are effectively suppressed, the electromagnetic noise and mechanical vibration generated by the compressor are reduced, and the acoustic performance and comfort of the product are improved.

[0040] Optionally, the inner diameter D of the second region 120 is 2 Satisfied, 5cm≤D 2 ≤30cm.

[0041] Optionally, the inner diameter D of the first region 110 1 Satisfied, 0mm<D 1 -D 2 ≤2mm. In this way, the stress distribution is optimized according to the matching characteristics of different areas.

[0042] Optionally, the inner diameter D of the third region 130 3 Satisfied, 0mm<D3 -D 2 ≤2mm. In this way, the stress distribution is optimized according to the matching characteristics of different areas.

[0043] Optionally, the axial length L of the first region 110 is 1 Satisfy, 0.1≤L 2 / L 1 ≤0.3. In this way, the stress generated during the operation of the compressor can be dispersed and the overall stability can be improved.

[0044] Optionally, the axial length L of the third region 130 is 3 Satisfy, 0.1≤L 2 / L 3 ≤0.3. In this way, the stress generated during the operation of the compressor can be dispersed and the overall stability can be improved.

[0045] Optionally, in the axial direction, a first transition surface is formed between the first region 110 and the second region 120, and the length L of the first transition surface is 过度1 Satisfied, 5mm≤L 过度1 ≤10mm, and the first transition surface is a circular arc surface; and / or, in the axial direction, a second transition surface is formed between the third area 130 and the second area 120, and the length of the second transition surface L 过度2 Satisfied, 5mm≤L 过度2 ≤10mm, and the second transition surface is an arc surface. Such an arrangement can avoid stress concentration and ensure the reliability and durability of the housing 100 structure.

[0046] Optionally, the axial length of the welding section is L 焊 Satisfy, 0.4≤L 焊 / L 定 ≤0.8. In this way, the stress distribution is optimized according to the matching characteristics of different areas.

[0047] The laser welding temperature is relatively low, and the temperature change in the core slot of the stator 210 is very small during welding, thus avoiding the risk of welding through.

[0048] Optionally, the second region 120 further includes a first blank section and a second blank section. In the axial direction, the first blank section and the second blank section are respectively located at two ends of the welding section. The length L of the welding section is 焊 Satisfied, 0mm≤L 2 -L 焊 ≤10mm, and the length of the first blank section is L 留白1 Satisfied, 0mm≤L 留白1 ≤5mm, the length of the second blank section is L 留白2 Satisfied, 0mm≤L 留白2 ≤5mm. This can disperse the stress generated during the operation of the compressor and improve the overall stability.

[0049] Optionally, the stator 210 and the second region 120 are interference fit, and the interference is between -0.1 mm and 0.1 mm.

[0050] like Figure 3 As shown, a processing technology is also provided, which is applicable to the above compressor, including:

[0051] S1, make the inner diameter D 2 A blank of a housing 100;

[0052] S2, processing the first area 110 and the third area 130 of the housing 100;

[0053] S3, installing the stator 210 in the housing 100;

[0054] S4. Perform laser welding to fix the stator 210 and the housing 100.

[0055] Specifically, when executing S1, a precision casting or forging process is used to manufacture a blank of the housing 100 to ensure that the basic shape and initial dimensional accuracy of the housing 100 are within a certain tolerance range. Generally, the initial inner diameter tolerance is controlled within ±0.05 mm.

[0056] When executing S2, the original inner diameter D 2 When the housing 100 is expanded from the axial ends to the middle, the inner diameter is 2 On the basis of increasing 0mm to 2mm, forming D 1 The first region 110 with an inner diameter and a 3 The third region 130 of the inner diameter satisfies 0.1≤L 2 / L 1 ≤0.3、0.1≤L 2 / L 3 ≤0.3. During the processing, the internal expansion size and shape accuracy are monitored in real time, and the processing parameters are adjusted in time to ensure that the internal expansion size meets the design requirements.

[0057] Furthermore, by precisely controlling the feed rate and cutting speed of the internal expansion tool, the dimensional accuracy after processing is guaranteed to reach ±0.02mm, and the surface roughness Ra reaches 0.8μm-1.6μm. When processing the internal expansion areas on both sides, special tool contours and CNC programs are used to achieve a gradual transition of the inner diameter to avoid stress concentration. The length of the transition area L 过度 The diameter is controlled within 5mm-10mm, and the transition curve is smooth and continuous. The tool of the internal expansion machine is made of high hardness and high wear resistance alloy material, and the tool wear is regularly detected and replaced to ensure the stability of processing quality.

[0058] When executing S3, a special tooling fixture is used to install the stator 210 to ensure the accuracy of the relative position of the stator 210 and the housing 100, wherein the coaxiality error between the stator 210 and the second area 120 is controlled within ±0.05mm, and the clearance or interference with the first area 110 and the third area 130 on the upper and lower sides meets the design requirements, that is, the interference fit with the second area 120 is between -0.1mm and 0.1mm, and the clearance fit or interference with the first area 110 and the third area 130 is between -0.1mm and 2.1mm.

[0059] When executing S4, the laser welding length is set to L 焊 , accurately control the laser welding length and the motor stacking height L 定 See if satisfied, 0.4≤L 焊 / L 定 ≤0.8. During the welding process, according to the change of the inner diameter of the shell 100 and the special material, the laser welding parameters are adjusted to adapt to the changes of different wall thicknesses and material properties, thereby ensuring the consistency of welding quality. In this way, the advantages of interference fit and laser welding connection structure can be fully utilized to improve the overall noise of the compressor.

[0060] Optionally, before executing S3, the stator 210 is cleaned and pre-treated to ensure that the surface of the stator 210 is free of impurities and oil stains.

[0061] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A compressor, characterized in that include: A shell (100), the shell (100) is columnar and includes a first region (110), a second region (120) and a third region (130) along the axial direction, the inner diameter D1 of the first region (110) satisfies D1>D2, and the inner diameter D3 of the third region (130) satisfies D3>D2; A motor is installed in the housing (100), the motor comprises a stator (210), the stator (210) and the housing (100) are fixed in the second region (120), and in the axial direction of the housing (100), the stacking height length L of the stator (210) is 定 , meet,L 定 >L2, L2 is the axial dimension of the second region (120), and in the radial projection of the housing (100), the stator (210) partially overlaps with the first region (110) and the third region (130); The second region (120) comprises a welding section, and the stator (210) and the housing (100) are fixed to each other in the welding section by laser welding.

2. The compressor according to claim 1, characterized in that The inner diameter D1 of the first region (110) satisfies 0mm<D1-D2≤2mm.

3. The compressor according to claim 1, characterized in that The inner diameter D3 of the third region (130) satisfies 0mm<D3-D2≤2mm.

4. The compressor according to claim 1, characterized in that The axial length L1 of the first region (110) satisfies 0.1≤L2 / L1≤0.

3.

5. The compressor according to claim 1, characterized in that The axial length L3 of the third region (130) satisfies 0.1≤L2 / L3≤0.

3.

6. The compressor according to claim 1, characterized in that In the axial direction, a first transition surface is formed between the first region (110) and the second region (120), and the length L of the first transition surface is 过度1 Meet, 5mm≤L 过度1 ≤10mm, and the first transition surface is a circular arc surface; And / or, in the axial direction, a second transition surface is formed between the third region (130) and the second region (120), and the length L of the second transition surface is 过度2 Satisfied, 5mm≤L 过度2 ≤10mm, and the second transition surface is a circular arc surface.

7. The compressor according to claim 1, characterized in that The length L of the welding section in the axial direction 焊 Satisfy, 0.4≤L 焊 / L 定 ≤0.

8.

8. The compressor according to claim 7, characterized in that The second region (120) further comprises a first blank section and a second blank section. In the axial direction, the first blank section and the second blank section are respectively located at two ends of the welding section. The length L of the welding section 焊 Satisfied, 0mm≤L2-L 焊 ≤10mm, and the length of the first blank section L 留白1 Satisfied, 0mm≤L 留白1 ≤5mm, the length of the second blank section L 留白2 Satisfied, 0mm≤L 留白2 ≤5mm.

9. The compressor according to claim 1, characterized in that The stator (210) and the second region (120) are interference fit, and the interference amount is between -0.1 mm and 0.1 mm.

10. A processing technology, applicable to the compressor according to any one of claims 1 to 9, characterized in that: include: S1, manufacturing a blank of the housing (100) having an inner diameter D2; S2, the inner diameter of the shell (100) with an inner diameter of D2 is enlarged from the axial ends to the middle to form the second area (120) with an inner diameter of D2, the first area (110) with an inner diameter of D1, and the third area (130) with an inner diameter of D3, wherein D1>D2, and D3>D2; S3, installing the stator (210) in the housing (100); S4. Perform laser welding to fix the stator (210) and the housing (100).

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