Compressor and processing technique

Abstract

This invention relates to the field of compressor technology, and provides a compressor and its manufacturing process. The housing is cylindrical and, along the axial direction, includes a first region, a second region, and a third region. The inner diameter D1 of the first region satisfies the condition that D1 > D2, and the inner diameter D3 of the third region satisfies the condition that D3 > D2. A motor is installed inside the housing, and the motor includes a stator. The stator is fixed to the housing in the second region. Along the axial direction of the housing, the stacking length L of the stator is... 定 , satisfy, L 定 >L2, where L2 is the axial dimension of the second region and its radial projection onto the housing. The stator partially overlaps with both the first and third regions. The second region includes a welded section, where the stator and housing are fixed using laser welding. This enhances the connection stability between the housing and the motor, optimizes motor performance, and reduces noise and vibration during compressor startup.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more particularly to a compressor and its manufacturing process. Background Technology

[0002] In existing compressor technology, the inner diameter of the casing is typically a single dimension. This design cannot meet the diverse requirements of the compressor's casing and motor fit under different operating conditions. For example, under high-frequency operation or when subjected to complex stress, the traditional single-diameter casing cannot effectively optimize the fit between the motor and the casing, resulting in deficiencies in connection strength, stability, and noise control. Furthermore, it cannot fully utilize the advantages of interference fits and laser-welded connections, limiting the improvement of overall compressor noise. Additionally, it generates severe electromagnetic noise during high-frequency operation (such as an electronic control switching frequency of 6250Hz), for which there is a lack of effective solutions.

[0003] Therefore, there is an urgent need for a compressor and processing technology to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to propose a compressor and its processing technology that can enhance the connection strength between the housing and the motor, thereby reducing the noise and vibration generated during compressor operation.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Compressor, including:

[0007] The shell, which is columnar in shape and extends axially, includes a first region, a second region, and a third region. The inner diameter D1 of the first region satisfies the following condition:

[0008] D1 > D2, and the inner diameter D3 of the third region above satisfies the condition that D3 > D2;

[0009] The motor, which is mounted within the housing, includes a stator, which is fixed to the housing in the second region. The stator has a stacking length L along the axial direction of the housing. 定 , satisfy, L 定 >L2, where L2 is the axial dimension of the second region and its radial projection onto the housing. The stator partially overlaps with both the first and third regions.

[0010] The second region mentioned above includes a welding section, where the stator and the housing are fixed by laser welding.

[0011] As a preferred technical solution for the above-mentioned compressor, the inner diameter D1 of the first region satisfies the condition 0mm < D1 - D2 ≤ 2mm.

[0012] As a preferred technical solution for the above-mentioned compressor, the inner diameter D3 of the third region satisfies the condition 0mm < D3 - D2 ≤ 2mm.

[0013] As a preferred technical solution for the above-mentioned compressor, the axial length L1 of the first region satisfies 0.1≤L2 / L1≤0.3.

[0014] As a preferred technical solution for the aforementioned compressor, the axial length L3 of the third region satisfies 0.1≤L2 / L3≤0.3.

[0015] As a preferred embodiment of the compressor described above, a first transition surface is formed between the first region and the second region along the axial direction, and the length L of the first transition surface is... 过渡1 Satisfies: 5mm≤L 过渡1 ≤10mm, and the first transition surface mentioned above is a curved surface;

[0016] And / or, along the aforementioned axial direction, a second transition surface is formed between the third region and the second region, the length L of the second transition surface being... 过渡2 Satisfies: 5mm≤L 过渡2 ≤10mm, and the second transition surface mentioned above is a circular arc surface.

[0017] As a preferred technical solution for the aforementioned compressor, the length L of the aforementioned welded section in the aforementioned axial direction is... 焊 Satisfies 0.4≤L 焊 / L 定 ≤0.8.

[0018] As a preferred embodiment of the compressor described above, the second region further includes a first blanking section and a second blanking section. Along the axial direction, the first blanking section and the second blanking section are located at opposite ends of the welded section, and the length L of the welded section is... 焊 Satisfies the condition that 0mm < L2 - L 焊 ≤10mm, and the length L of the first blank section mentioned above 留白1 Satisfies the condition that 0mm < L 留白1 ≤5mm, the length L of the second blank section mentioned above 留白2 Satisfies the condition that 0mm < L 留白2 ≤5mm.

[0019] As a preferred technical solution for the above-mentioned compressor, the stator and the second region are interference-fitted, with the interference amount ranging from -0.1mm to 0.1mm.

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

[0021] S1. Make a blank of the above-mentioned shell with an inner diameter of D2;

[0022] S2. The inner diameter of the shell with inner diameter D2 is expanded from the two ends of its axis toward the middle to form the second region with inner diameter D2, the first region with inner diameter D1 and the third region with inner diameter D3, where D1>D2 and D3>D2.

[0023] S3. Install the stator into the housing.

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

[0025] Beneficial effects of this invention:

[0026] This invention provides a compressor, including a housing and a motor. The housing is cylindrical and, along its axial direction, includes a first region, a second region, and a third region. The inner diameter D1 of the first region satisfies the condition that D1 > D2, and the inner diameter D3 of the third region satisfies the condition that D3 > D2. The motor is mounted within the housing and includes a stator. The stator is fixed to the housing in the second region, and along the axial direction of the housing, the stacking length L of the stator is... 定 , satisfy, L 定 >L2, where L2 is the axial dimension of the second region and its radial projection onto the housing. The stator partially overlaps with both the first and third regions. The second region includes a welded section, and the stator and housing are fixed to the welded section by laser welding.

[0027] Thus, the housing is divided into three axial regions: a first region, a second region, and a third region. The first region's connection to the second region, and the third region's connection to the second region, are all variable-diameter designs. This allows for a precise fit between the housing and the motor in different regions, effectively dispersing stress, improving the load-bearing capacity of the connection points, enhancing the compressor's stability during operation, and reducing the risk of failure due to loose connections or deformation. Furthermore, the housing's inner diameter values ​​include D1, D2, and D3. This non-uniform inner diameter structure improves the magnetic circuit and heat conduction path around the motor based on the motor's magnetic field distribution and heat dissipation requirements. The middle region with an inner diameter of D2 provides stable support and a good magnetic permeability environment for the motor, contributing to improved motor efficiency. The first and third regions, to some extent, promote heat dissipation, reducing motor temperature rise, thereby improving overall motor performance and extending motor lifespan. Moreover, at high-frequency operation, such as an electronic control switching frequency of 6250Hz, the housing's inner diameter structure can alter the vibration propagation path and frequency response characteristics. Through optimized stiffness distribution and fit clearance design, the transmission and amplification of vibration are effectively suppressed, reducing electromagnetic noise and mechanical vibration generated by the compressor, and improving the acoustic performance and user comfort of the product. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

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

[0030] Figure 2 This is a partial enlarged view of the second region provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the processing technology provided in the embodiments of the present invention.

[0032] In the picture:

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

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in 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, along its axial direction, includes a first region 110, a second region 120, and a third region 130. The inner diameter D1 of the first region 110 satisfies the condition that D1 > D2, and the inner diameter D3 of the third region 130 satisfies the condition that D3 > D2. The motor is mounted within the housing 100 and includes a stator 210. The stator 210 is fixed to the housing 100 in the second region 120. Along the axial direction of the housing 100, the stacking length L of the stator 210 is... 定 , satisfy, L 定 >L2, where L2 is the axial dimension of the second region 120 and its radial projection onto the housing 100. The stator 210 partially overlaps with both 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 to the welding section by laser welding.

[0039] Thus, the housing 100 is divided axially into a first region 110, a second region 120, and a third region 130. The first region 110 and the second region 120, as well as the third region 130 and the second region 120, are all variable-diameter designs. This allows the housing 100 and the motor to form a precise fit in different regions, effectively dispersing stress, improving the load-bearing capacity of the connection points, enhancing the stability of the compressor during operation, and reducing the risk of failure due to loose connections or deformation. Furthermore, the inner diameter of the housing 100 includes D1, D2, and D3. This non-uniform inner diameter structure can improve the magnetic circuit and heat conduction path around the motor according to the motor's magnetic field distribution and heat dissipation requirements. The middle region with an inner diameter of D2 provides stable support and a good magnetic permeability environment for the motor, helping to improve motor efficiency. The first region 110 and the third region 130 can, to a certain extent, promote heat dissipation, reduce motor temperature rise, thereby improving the overall performance of the motor and extending its service life. Furthermore, during high-frequency operation, such as at an electronic control switching frequency of 6250Hz, the 100mm inner diameter structure of the housing can alter the vibration propagation path and frequency response characteristics. Through optimized stiffness distribution and fit clearance design, the transmission and amplification of vibration are effectively suppressed, reducing electromagnetic noise and mechanical vibration generated by the compressor, and improving the product's acoustic performance and user comfort.

[0040] Optionally, the inner diameter D2 of the second region 120 satisfies 5cm≤D2≤30cm.

[0041] Optionally, the inner diameter D1 of the first region 110 satisfies 0mm < D1 - D2 ≤ 2mm. Thus, the stress distribution is optimized based on the fit characteristics of different regions.

[0042] Optionally, the inner diameter D3 of the third region 130 satisfies the condition 0mm < D3 - D2 ≤ 2mm. Thus, the stress distribution is optimized based on the fit characteristics of different regions.

[0043] Optionally, the axial length L1 of the first region 110 satisfies 0.1≤L2 / L1≤0.3. This can disperse the stress generated during compressor operation and improve overall stability.

[0044] Optionally, the axial length L3 of the third region 130 satisfies 0.1≤L2 / L3≤0.3. This can disperse the stress generated during compressor operation and improve overall stability.

[0045] Optionally, a first transition surface is formed between the first region 110 and the second region 120 in the axial direction, and the length L of the first transition surface is... 过渡1 Satisfies: 5mm≤L 过渡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, the length L of the second transition surface being...过渡2 Satisfies: 5mm≤L 过渡2 The thickness is ≤10mm, and the second transition surface is a curved surface. This design avoids stress concentration and ensures the reliability and durability of the shell 100 structure.

[0046] Optionally, the axial length L of the welded segment 焊 Satisfies 0.4≤L 焊 / L 定 ≤0.8. Thus, the stress distribution was optimized based on the matching characteristics of different regions.

[0047] Laser welding has a relatively low temperature, and the temperature change inside the core slot of stator 210 is very small during welding, thus avoiding the risk of weld burn-through.

[0048] Optionally, the second region 120 also includes a first blank section and a second blank section, which are located at the two ends of the welded section along the axial direction, and the length L of the welded section is... 焊 Satisfies the condition that 0mm < L2 - L 焊 ≤10mm, and the length L of the first blank section 留白1 Satisfies the condition that 0mm < L 留白1 ≤5mm, the length L of the second blank section 留白2 Satisfies the condition that 0mm < L 留白2 ≤5mm. This helps to distribute the stress generated during compressor operation and improve overall stability.

[0049] Optionally, the stator 210 is interference-fitted with the second region 120, with an interference amount ranging from -0.1 mm to 0.1 mm.

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

[0051] S1. Make a blank of shell 100 with an inner diameter of D2;

[0052] S2, process the first region 110 and the third region 130 of the housing 100;

[0053] S3. Install the stator 210 into the housing 100;

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

[0055] Specifically, when performing S1, the blank of the shell 100 is manufactured using precision casting or forging processes to ensure that the basic shape and initial dimensional accuracy of the shell 100 are within a certain tolerance range. Generally, the initial inner diameter tolerance is controlled within ±0.05mm.

[0056] During S2, the shell 100, originally with an inner diameter of D2, is expanded inward from both ends towards the center along its axial direction. This increases the inner diameter by 0mm to 2mm from D2, forming a first region 110 with an inner diameter of D1 and a third region 130 with an inner diameter of D3, satisfying the conditions 0.1≤L2 / L1≤0.3 and 0.1≤L2 / L3≤0.3. During processing, the inward expansion dimensions and shape accuracy are monitored in real time, and processing parameters are adjusted promptly to ensure that the inward expansion dimensions meet design requirements.

[0057] Furthermore, by precisely controlling the feed rate and cutting speed of the reaming tool, the dimensional accuracy after machining is ensured to reach ±0.02mm, and the surface roughness Ra reaches 0.8μm-1.6μm. When machining the upper and lower reaming areas, a special tool profile and CNC program are used to achieve a gradual transition in the inner diameter, avoiding stress concentration, and ensuring a transition area length L. 过渡 The thickness should be controlled within 5mm-10mm, and the transition curve should be smooth and continuous. The cutting tools of the internal expansion machine are made of high-hardness, high-wear-resistant alloy materials, and tool wear is regularly inspected and replaced to ensure the stability of processing quality.

[0058] When performing 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. The coaxiality error between the stator 210 and the second region 120 is controlled within ±0.05mm. The clearance or interference with the first region 110 and the third region 130 on the upper and lower sides meets the design requirements. That is, the interference fit with the second region 120 is between -0.1mm and 0.1mm, and the clearance fit or interference with the first region 110 and the third region 130 is between -0.1mm and 2.1mm.

[0059] When executing S4, the laser welding length is set to L. 焊 Precisely control the laser welding length and the overlap height L of the motor. 定 See if it satisfies 0.4≤L 焊 / L 定 ≤0.8. During the welding process, the laser welding parameters are adjusted according to the changes in the inner diameter of the shell (100mm) and the special characteristics of the material to adapt to variations in wall thickness and material properties, thereby ensuring consistent welding quality. This fully leverages the advantages of interference fit and laser welding connections, improving the overall noise level of the compressor.

[0060] Optionally, the stator 210 may be cleaned and pre-treated before performing S3. This ensures that the surface of the stator 210 is free of impurities and oil.

[0061] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A compressor, characterized in that, include: The housing (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 that D1 > D2, and the inner diameter D3 of the third region (130) satisfies that D3 > D2. A motor is installed in the housing (100), the motor comprises a stator (210), the stator (210) is fixed with the housing (100) in the second area (120), in the axial direction of the housing (100), the stack height length L of the stator (210) 定 , satisfies, L 定 > L2, L2 is the axial dimension of the second area (120), and in the radial projection of the housing (100), the stator (210) partially overlaps with the first area (110) and the third area (130); The second region (120) includes a welding section, wherein the stator (210) and the housing (100) are fixed to the welding section by laser welding; The inner diameter D1 of the first region (110) satisfies that 0mm < D1 - D2 ≤ 2mm; The inner diameter D3 of the third region (130) satisfies that 0mm < D3 - D2 ≤ 2mm; The length L of the welded section in the axial direction 焊 Satisfies 0.4≤L 焊 / L 定 ≤0.8; The second region (120) further includes a first blank section and a second blank section, which are located at opposite ends of the welded section along the axial direction. The length L of the welded section is... 焊 Satisfies the condition that 0mm < L2 - L 焊 ≤10mm, and the length L of the first blank section 留白1 Satisfies the condition that 0mm < L 留白1 ≤5mm, the length L of the second blank section 留白2 Satisfies the condition that 0mm < L 留白2 ≤5mm; The axial length L1 of the first region (110) satisfies 0.1≤L2 / L1≤0.3; The axial length L3 of the third region (130) satisfies 0.1≤L2 / L3≤0.

3.

2. The compressor according to claim 1, characterized in that, Along 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... 过渡1 Satisfies: 5mm≤L 过渡1 ≤10mm, and the first transition surface is a circular arc surface; And / or, along the axial direction, a second transition surface is formed between the third region (130) and the second region (120), the length of the second transition surface being L. 过渡2 Satisfies: 5mm≤L 过渡2 ≤10mm, and the second transition surface is a circular arc surface.

Images