Vibration and noise reduction stator structure and compressor

Abstract

The invention discloses a vibration and noise reduction stator structure and a compressor, the vibration and noise reduction stator structure comprises a stator body and memory metal, the stator body is provided with a stator yoke part, the excircle of the stator yoke part is provided with at least one circulation groove, the stator yoke part comprises at least one stator part and at least one trimming part, and the at least one circulation groove is communicated with the at least one circulation groove. One end of the stator part is connected with one end of the trimming part, a gap is formed between the other end of the stator part and the other end of the trimming part, the gap is communicated with the circulation groove, the memory metal is arranged in the gap, and the two ends of the memory metal are connected with the other end of the stator part and the other end of the trimming part respectively so as to stretch or contract along with temperature changes. According to the compressor, the stator is divided into the stator part and the trimming part through the gap, the memory metal is used for connecting the stator part and the trimming part in the gap, and when the working condition changes, the memory metal stretches or shrinks along with the change of the internal temperature of the compressor, so that the contact strength of the trimming part and the shell is changed, and the noise vibration level of the compressor is improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a vibration-damping and noise-reducing stator structure and compressor. Background Technology

[0002] With the continuous development of the air conditioning industry, the evaporator and condenser, core components of air conditioners, are evolving towards miniaturization. This trend is driving the operating frequency of inverter rotor compressors to continuously increase, while their operating conditions are becoming increasingly complex. Against this backdrop, the noise and vibration problems of compressors are becoming increasingly prominent, not only affecting the operational stability of the compressor itself, but also further deteriorating the overall sound quality of the air conditioner, adversely impacting the user experience.

[0003] In the noise and vibration transmission path of a compressor, the connection between the compressor motor and the housing is a critical link. The structural characteristics and assembly method of this part have a significant impact on the overall noise and vibration level of the compressor. Currently, such as Figure 1 As shown, the mainstream assembly methods of compressor motors and housings in the industry are mainly divided into two categories: First, the housing is heated to expand it, and then the stator is fitted into the housing. After the housing cools down, it forms an interference fit with the stator, thereby achieving a fixed connection between the two; Second, laser welding technology is used to directly weld the stator and housing together.

[0004] To optimize the noise and vibration transmission path between the compressor motor and the housing, common improvement methods in the prior art include: adjusting the shape and size of the stator teeth and yoke to change the structural modes of the stator itself; changing the interference fit when assembling the stator and the housing; or adjusting the welding strength of laser welding, thereby attempting to avoid the modal frequencies of other structures or the excitation frequency of the compressor during operation, thereby reducing noise and vibration.

[0005] However, the aforementioned existing technologies have significant limitations: once the stator and housing are assembled, the vibration transmission characteristics between them remain fixed and cannot be adjusted according to changes in operating conditions. This means that existing design methods can only optimize noise and vibration for a specific operating condition, making it difficult to consider the complex and varied operating conditions of compressors. When the compressor's operating conditions or load change, the fixed transmission path is prone to noise and vibration deterioration, ultimately rendering existing technologies unable to meet the increasingly complex operating requirements of today's compressors. Summary of the Invention

[0006] The purpose of this invention is to provide a vibration-reducing and noise-reducing stator structure and compressor, which aims to solve the problems of noise and vibration deterioration that occur under certain operating conditions in existing stator design methods.

[0007] This invention provides a vibration-damping and noise-reducing stator structure, comprising: a stator body and a shape memory metal. The stator body is provided with a stator yoke, and the outer circumference of the stator yoke is provided with at least one flow groove. The stator yoke includes at least one stator portion and at least one truncated edge portion. One end of the stator portion and one end of the truncated edge portion are connected, and a gap is provided between the other end of the stator portion and the other end of the truncated edge portion. The gap communicates with the flow groove. The shape memory metal is disposed in the gap, and both ends of the shape memory metal are respectively connected to the other end of the stator portion and the other end of the truncated edge portion to stretch or contract with temperature changes.

[0008] Furthermore, the thickness of the stator yoke is a, and the thickness of the stator is b, satisfying: 0.5a≤b≤0.75a.

[0009] Furthermore, the thickness of the stator yoke is a, and the thickness of the tangent portion is c, satisfying: 0.1a≤c≤0.4a.

[0010] Furthermore, the thickness of the stator yoke is a, and the width of the gap is d, satisfying: 0.1a≤d≤0.3a.

[0011] Furthermore, the width of the gap is d, and the initial axial length of the shape memory metal is f, satisfying: 0.9d≤f≤1.1d.

[0012] Furthermore, the deformation amount of the shape memory metal is ∆f, which satisfies: 0.05f≤∆f≤0.15f.

[0013] Furthermore, the shape of the shape memory metal includes: spring or sheet shape.

[0014] Furthermore, the two ends of the shape memory metal are respectively connected to the other end of the stator portion and the other end of the cut edge portion by welding or riveting.

[0015] Furthermore, it also includes: a housing, wherein the stator body is disposed within the housing and abuts against the inner wall of the housing.

[0016] This invention also provides a compressor, including the above-described vibration-damping and noise-reducing stator structure.

[0017] This invention discloses a vibration-damping and noise-reducing stator structure and compressor. The vibration-damping and noise-reducing stator structure includes a stator body and a shape memory metal. A stator yoke is provided on the stator body, and at least one flow groove is provided on the outer circumference of the stator yoke. The stator yoke includes at least one stator portion and at least one truncated portion. One end of the stator portion and one end of the truncated portion are connected, and a gap is provided between the other end of the stator portion and the other end of the truncated portion. The gap communicates with the flow groove. The shape memory metal is disposed within the gap, and its two ends are respectively connected to the other end of the stator portion and the other end of the truncated portion to stretch or contract with temperature changes. This invention divides the stator into a stator portion and a truncated portion through the gap, and uses shape memory metal to connect the stator portion and the truncated portion within the gap. When operating conditions change, the internal temperature of the compressor changes, and the shape memory metal stretches or contracts accordingly. The cut edges connected by the shape memory metal also deform, which changes the contact strength between the stator cut edges and the housing. This affects the transmission characteristics between the stator and the housing, preventing the excitation load frequency generated during stator operation from being close to the modal resonance peak frequency of the transmission path between the stator and the housing, thus avoiding a violent response and improving the noise and vibration level of the compressor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an existing noise reduction stator structure; Figure 2 This is a schematic diagram of the vibration reduction and noise reduction stator structure in this embodiment; Figure 3 for Figure 2 A partial view of section A in the middle; Figure 4 A schematic diagram of the dimensions of the stator structure for vibration reduction and noise reduction; Figure 5 A schematic diagram of a shape memory metal spring. Figure 6 A schematic diagram of a shape memory metal in the form of a thin sheet; Figure 7 This is a schematic diagram of the compressor structure; Explanation of the labels in the diagram: 1. Stator body; 11. Stator yoke; 111. Flow groove; 112. Stator section; 113. Cut edge section; 114. Gap; 2. Shape memory metals; 3. Shell; 4. Top cover assembly; 5. Rotor assembly; 6. Pump body assembly; 7. Bottom cover; 8. Dispenser components. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] Please see Figures 2-4 This embodiment provides a vibration reduction and noise reduction stator structure, including: a stator body 1 and a shape memory metal 2. The stator body 1 is provided with a stator yoke 11, and at least one flow groove 111 is provided on the outer circle of the stator yoke 11. The stator yoke 11 includes at least one stator part 112 and at least one tangent part 113. One end of the stator part 112 and one end of the tangent part 113 are connected. The other end of the stator part 112 and the other end of the tangent part 113 are provided with a gap 114. The gap 114 communicates with the flow groove 111. The shape memory metal 2 is disposed in the gap 114, and the two ends of the shape memory metal 2 are respectively connected to the other end of the stator part 112 and the other end of the tangent part 113 to stretch or contract with temperature changes.

[0025] When the compressor is running, the motor generates a radial electromagnetic force, which acts on the housing 3 via the stator. This force is the excitation load of the stator on the housing 3, and the load frequency increases with the operating frequency of the compressor. As the compressor frequency increases, the internal temperature of the housing 3 rises, causing the shape memory metal 2 to stretch and deform. The resulting force compresses the tangent portion 113 towards the housing 3, increasing the connection stiffness between the stator and the housing 3, and consequently increasing the modal resonance peak frequency of the transmission path between the stator and the housing 3. Conversely, as the compressor frequency decreases, the internal temperature of the housing 3 decreases, causing the shape memory metal 2 to contract and deform. The resulting force pulls the tangent portion 113 towards the stator portion 112, decreasing the connection stiffness between the stator and the housing 3, and consequently decreasing the modal resonance peak frequency of the transmission path between the stator and the housing 3. In other words, the excitation load frequency generated by the stator during compressor operation and the modal resonance peak frequency of the transmission path in the housing 3 rise or fall simultaneously, ensuring that the stator excitation load and the modal resonance peak frequency of the transmission path in the housing 3 never coincide, thus preventing structural resonance response.

[0026] In this embodiment, a plurality of flow grooves 111 are provided on the outer circle of the stator yoke 11. The stator yoke 11 includes a plurality of stator parts 112 and a plurality of cut-edge parts 113. Each gap 114 is connected to a flow groove 111. The number of flow grooves 111 is greater than or equal to the number of stator parts 112, and the number of stator parts 112 is equal to the number of cut-edge parts 113.

[0027] Specifically, a stator yoke 11 is integrally formed on the stator body 1. The stator yoke 11 has a plurality of flow grooves 111 evenly arranged along its outer circumference. The extension direction of the flow grooves 111 is consistent with the axial direction of the stator yoke 11. The plurality of flow grooves 111 are evenly distributed on the outer circumference of the stator yoke 11. The width and depth of the flow grooves 111 are set according to the overall size of the stator yoke 11 and the actual assembly requirements to adapt to the subsequent cooperation with the compressor housing 3 assembly.

[0028] The stator yoke 11 includes a stator portion 112 and a tangent portion 113, which are distributed circumferentially along the stator yoke 11. One end of the stator portion 112 is connected to one end of the tangent portion 113 by a connecting portion, which is an integrally formed structure of the stator portion 112 and the tangent portion 113. The radial width of the connecting portion is smaller than the circumferential width of the stator portion 112, and the circumferential width of the connecting portion is smaller than the circumferential width of the tangent portion 113, to ensure that the stator portion 112 and the tangent portion 113 are not completely separated and retain a certain structural connection strength. A gap 114 is formed between the other end of the stator portion 112 and the other end of the tangent portion 113. The extension direction of the gap 114 is the same as the radial direction of the stator yoke 11, and one end of the gap 114 is connected to one of the flow grooves 111 on the outer circle of the stator yoke 11, so that the internal space of the gap 114 is interconnected with the cavity of the flow groove 111.

[0029] Multiple flow channels 111 are evenly distributed along the outer circumference of the stator yoke 11, with each gap 114 directly connected to one flow channel 111, forming an efficient cooling medium flow path. This design ensures that the cooling medium (such as air or oil) can flow from the flow channels 111 into the gap 114 area, achieving localized targeted cooling of the connection point between the stator section 112 and the cut edge section 113. The number of flow channels 111 is greater than or equal to the number of stator sections 112, ensuring that each stator section 112 receives sufficient cooling coverage through the gaps 114, avoiding the generation of hot spots, thereby reducing the overall stator temperature and extending the component life. The connection structure between the gaps 114 and the flow channels 111 enhances heat exchange efficiency, making it particularly suitable for heat dissipation requirements during high-speed operation.

[0030] In some embodiments, multiple memory metals 2 are provided, and multiple memory metals 2 are provided within the same gap 114.

[0031] Specifically, multiple shape memory metals 2 are arranged axially and / or side-by-side within the same gap 114. These shape memory metals 2 are evenly distributed within the gap 114 or non-uniformly distributed according to stress requirements. Each shape memory metal 2 is fixedly connected at both ends to the stator portion 112 and the trimmed portion 113, respectively. Multiple shape memory metals 2 deform synchronously in the same temperature field, collectively driving the trimmed portion 113 to produce displacement. This arrangement increases the total driving force of the shape memory metals 2, making the control of the trimmed portion 113 more powerful and stable. The coordinated work of multiple shape memory metals 2 also improves the reliability of the system; even if a single shape memory metal 2 malfunctions, the remaining shape memory metals 2 can still maintain some adjustment function. The cumulative deformation of the multiple shape memory metals 2 is converted into effective adjustment of the connection stiffness of the shell 3 through the trimmed portion 113.

[0032] In some embodiments, the bottom surface of the flow channel 111 and the outer end face of the stator portion 112 are located on the same circular surface.

[0033] Specifically, the bottom surface of the flow channel 111 and the outer end face of the stator section 112 are concentric circles, meaning that the bottom surface of the flow channel 111 and the outer end face of the stator section 112 are continuous and smooth arc surfaces without steps, protrusions, or depressions. Simultaneously, the smooth arc surface formed by the concentric circles of the bottom surface of the flow channel 111 and the outer end face of the stator section 112 reduces the resistance of the working fluid flowing around the stator. When the working fluid flows through the flow channel 111 on the outer circle of the stator yoke section 11, it can pass smoothly along the concentric smooth surface, avoiding dead zones or eddies caused by steps at the bottom of the channel and the outer end face of the stator section 112. This optimizes the fluid dynamics environment inside the compressor, indirectly ensuring the compressor's heat exchange efficiency and operational stability. Furthermore, when machining the outer end faces of the flow groove 111 and the stator part 112, the machining path can be set based on the same center (the center of the stator yoke 11), and the two can be formed in one clamping. There is no need to adjust the tooling multiple times or perform subsequent grinding corrections. This can ensure the dimensional accuracy of the cocircle, improve machining efficiency, and reduce the process complexity and cost during mass production.

[0034] In this embodiment, it also includes: a housing 3, a stator body 1 disposed inside the housing 3, and the stator body 1 abutting against the inner wall of the housing 3.

[0035] Specifically, the housing 3 is a cylindrical hollow structure, and its inner wall diameter is matched with the outer diameter of the stator body 1. The matching is based on ensuring that the stator body 1 can be installed in the housing 3 and that the outer wall and the inner wall of the housing 3 are in close contact. The housing 3 is made of metal material commonly used in compressors and has sufficient structural strength to withstand the radial force after the stator body 1 is assembled. At the same time, its inner wall surface is smoothed to reduce local friction loss when the stator body 1 abuts against the inner wall.

[0036] The stator body 1 is structurally configured as follows: A stator yoke 11 is integrally formed on the stator body 1. The stator yoke 11 is divided into a stator part 112 and a cut-edge part 113 along the circumferential direction. One end of the stator part 112 is connected to one end of the cut-edge part 113 through a connecting part. A gap 114 is formed between the other end of the stator part 112 and the other end of the cut-edge part 113. The outer arc surface of the cut-edge part 113 is coplanar with the outer arc surface of the stator body 1. This design ensures that after the stator body 1 is installed into the housing 3, the outer arc surface of the cut-edge part 113 can directly abut against the inner wall of the housing 3. This allows the entire stator body 1 to fully abut against the inner wall of the housing 3 through the cut-edge part 113 and part of the outer arc surface of the stator part 112, thus avoiding local gaps after assembly.

[0037] The shape memory metal 2 is disposed in the gap 114 between the stator part 112 and the cut edge part 113. One end of the shape memory metal 2 is fixed to the end face of the other end of the stator part 112 by welding, and the other end is fixed to the end face of the other end of the cut edge part 113 by welding. The length of the shape memory metal 2 is adapted to the width of the gap 114. When the temperature changes, it can stretch or contract along the width direction of the gap 114, causing the cut edge part 113 to deform slightly. However, the amount of deformation is controlled within the range that does not damage the contact state between the cut edge part 113 and the inner wall of the housing 3. The transmission characteristics between the stator body 1 and the housing 3 are adjusted only by changing the magnitude of the contact force between the cut edge part 113 and the inner wall of the housing 3.

[0038] In this embodiment, the thickness of the stator yoke 11 is a, and the thickness of the stator part 112 is b, satisfying: 0.5a≤b≤0.75a.

[0039] Specifically, a stator yoke 11 is integrally formed on the stator body 1. The stator yoke 11 is the core load-bearing structure of the stator body 1, providing support along the radial direction of the compressor housing 3. Its thickness is defined as a (i.e., the maximum dimension of the stator yoke 11 along the radial direction of the stator body 1, which is the basic dimension reference of the stator structure).

[0040] The stator yoke 11 is divided into a stator section 112 and a cut-edge section 113 along the circumferential direction. The stator section 112 is the main load-bearing part of the stator yoke 11, which bears the main responsibility for transmitting the radial electromagnetic force of the motor. Its thickness is defined as b (i.e., the dimension of the stator section 112 along the radial direction of the stator body 1). According to the design requirements of the present invention, the thickness b of the stator section 112 must satisfy 0.5a≤b≤0.75a. This design ensures that the stator section 112, as the main structure of the stator yoke 11, can provide sufficient mechanical strength and magnetic cross-sectional area, thereby ensuring the stability and efficiency of the motor magnetic circuit and avoiding magnetic saturation or insufficient structural strength caused by the stator section 112 being too thin.

[0041] Secondly, this thickness ratio provides a reasonable space for the cut-edge portion 113, allowing it to generate sufficient elastic deformation under the drive of the shape memory metal 2, thereby effectively adjusting the connection stiffness between the stator and the housing 3. If the stator portion 112 is too thick, the cut-edge portion 113 will be relatively weak, affecting its adjustment capability and its own strength; if the stator portion 112 is too thin, it will affect the overall structural rigidity of the stator.

[0042] Taking a stator yoke 11 thickness a=24mm as an example, the stator part 112 thickness b ranges from 12mm≤b≤18mm. In this embodiment, b=15mm is selected. This dimension can ensure that the stator part 112 has sufficient rigidity to support the installation of the stator winding and the transmission of electromagnetic force, and also allows the cut edge part 113 and the gap 114 to obtain appropriate dimensions, avoiding insufficient deformation space of the cut edge part 113 due to the stator part 112 being too thick, or a decrease in the overall structural strength due to the stator part 112 being too thin.

[0043] In this embodiment, the thickness of the stator yoke 11 is a, and the thickness of the tangent part 113 is c, satisfying: 0.1a≤c≤0.4a.

[0044] Specifically, the cut-edge portion 113 is the part of the stator yoke 11 that directly abuts against the inner wall of the housing 3. It serves to adjust the transmission characteristics between the stator and the housing 3 through deformation. Its thickness is defined as c (i.e., the radial dimension of the cut-edge portion 113 along the stator body 1). According to design requirements, the thickness c of the cut-edge portion 113 must satisfy 0.1a ≤ c ≤ 0.4a. This thickness relationship ensures that the cut-edge portion 113 has appropriate structural stiffness. When the shape memory metal 2 deforms due to temperature changes, the cut-edge portion 113 within this thickness range can effectively follow the deformation, thereby sensitively adjusting its contact state with the housing 3. This design ensures that the cut-edge portion 113 is neither too thick and rigid, affecting its responsiveness to the drive of the shape memory metal 2, nor too thin, resulting in insufficient structural strength and potential fatigue damage during long-term operation. This thickness ratio allows the cut edge 113 to occupy a reasonable space in the stator yoke 11, ensuring the integrity of the stator's main magnetic circuit and providing a dedicated structural unit for the active adjustment of the vibration transmission path, thus achieving a coordinated unity between the main function and the vibration reduction function.

[0045] Taking the stator yoke 11 with a thickness of a=25mm as an example, the thickness c of the cut edge 113 is in the range of 2.5mm≤c≤10mm. In this embodiment, c=5mm (i.e. 0.2a) is selected. This value is in the middle range of the value range. It can avoid insufficient structural strength due to c being too small (such as less than 2.5mm), which can easily cause fatigue damage under long-term operation. It can also prevent the cut edge 113 from being too stiff due to c being too large (such as greater than 10mm), which would make it difficult to drive the shape memory metal 2 to generate effective deformation when stretched or contracted, and thus unable to adjust the contact force with the inner wall of the shell 3, thus losing the function of optimizing the transmission characteristics.

[0046] In this embodiment, the thickness of the stator yoke 11 is a, and the width of the gap 114 is d, satisfying: 0.1a≤d≤0.3a.

[0047] Specifically, the gap 114 provides space for the installation and operation of the shape memory metal 2, and its width is defined as d (i.e., the vertical distance between the outer peripheral end face of the stator part 112 and the inner peripheral end face of the cut edge part 113). According to the design requirements, the width d of the gap 114 must satisfy 0.1a≤d≤0.3a. This gap 114 width provides sufficient deformation space for the shape memory metal 2 element, while avoiding the problem of insufficient rigidity in the connection area between the stator part 112 and the cut edge part 113 due to an excessively large gap 114. This design enables the stator to effectively absorb and disperse stress through the slight deformation of the gap 114 area when subjected to electromagnetic force or assembly stress, thereby improving structural stability. At the same time, the gap 114 is connected to the flow groove 111 on the outer circle of the stator yoke part 11, and the ratio of width d to thickness a indirectly optimizes the flow path of the cooling medium. Increasing the d value within a certain range enhances the interconnected network formed by the gap 114 and the flow groove 111, promotes the flow of cooling medium in the contact area between the stator and the housing 3, helps to dissipate heat from the stator yoke 11 in a timely manner, and improves the overall heat dissipation effect.

[0048] Taking a stator yoke 11 thickness a=22mm as an example, the width d of the gap 114 is in the range of 2.2mm≤d≤6.6mm. In this embodiment, d=4mm is selected. This value is in the middle range, which can provide sufficient installation space for the shape memory metal 2, and will not cause the connection stability between the stator part 112 and the cut edge part 113 to decrease due to d being too large (such as exceeding 6.6mm), or cause the shape memory metal 2 to be unable to stretch / contract sufficiently when the temperature changes due to d being too small (such as less than 2.2mm), thus failing to effectively drive the cut edge part 113 to deform.

[0049] In this embodiment, the width of the gap 114 is d, and the initial axial length of the shape memory metal 2 is f (e.g., Figure 5 or Figure 6 As shown), it satisfies: 0.9d≤f≤1.1d.

[0050] Specifically, the shape memory metal 2 is disposed within the gap 114 between the stator portion 112 and the cut-edge portion 113, and its initial axial length f is defined as the natural length of the shape memory metal 2 at room temperature. According to design requirements, f must satisfy 0.9d ≤ f ​​≤ 1.1d. This proportional relationship ensures that the dimensions of the shape memory metal 2 are perfectly matched to the installation space, greatly simplifying the assembly process. Since the initial length f of the shape memory metal 2 is nearly equal to the width d of the gap 114, the shape memory metal 2 can be smoothly inserted into the gap 114 during room temperature assembly without applying excessive force or making complex adjustments. This avoids stress concentration caused by an excessively long shape memory metal 2 or loosening of the connection due to an excessively short shape memory metal 2. This dimensional matching ensures that both ends of the shape memory metal 2 can form stable and sufficient contact with the end faces of the stator portion 112 and the cut-edge portion 113, providing ideal conditions for subsequent welding or bonding fixation. Taking d=4mm as an example, the range of f can be calculated to be 3.6mm≤f≤4.4mm; in this embodiment, f=4mm is selected, which is in the middle range of the value range, and a reasonable margin is reserved for the deformation of the shape memory metal 2.

[0051] When the compressor's operating conditions change, the temperature inside the housing 3 changes accordingly: if the temperature rises, the shape memory metal 2 stretches axially, exceeding the initial length of f=4mm (even if increased to 4.2mm, it is still within the elastic deformation range of the material), causing the tangent portion 113 to deform slightly towards the inner wall of the housing 3, increasing the contact force between the tangent portion 113 and the inner wall of the housing 3; if the temperature decreases, the shape memory metal 2 contracts axially, causing the tangent portion 113 to retract towards the stator portion 112, reducing the contact force between the tangent portion 113 and the inner wall of the housing 3. During this process, the initial length design of f=4mm ensures that the stretching / contraction of the shape memory metal 2 is always within a reasonable stroke.

[0052] Furthermore, the deformation of shape memory metal 2 is ∆f, which satisfies: 0.05f≤∆f≤0.15f.

[0053] Specifically, the deformation amount ∆f of the shape memory metal 2 (i.e., the change in axial length of the shape memory metal 2 due to temperature change) must satisfy 0.05f ≤ ∆f ≤ 0.15f. Taking f = 5mm as an example, the range of ∆f can be calculated to be 0.25mm ≤ |∆f| ≤ 0.75mm, ensuring that the deformation amount can effectively adjust the transmission characteristics between the stator and the shell 3 without exceeding the elastic limit of the shape memory metal 2.

[0054] When the compressor's operating conditions change, the temperature inside the casing 3 changes accordingly, and the deformation of the shape memory metal 2 is strictly controlled within the above-mentioned range: As the compressor operating frequency increases, the temperature inside the housing 3 also increases. The shape memory metal 2 is stretched axially due to the heat. The stretching action causes the tangent part 113 to deform slightly towards the inner wall of the housing 3, which increases the contact force between the tangent part 113 and the inner wall of the housing 3. Consequently, the modal resonance peak frequency of the transmission path between the stator and the housing 3 increases, thus avoiding overlap with the frequency of the increased excitation load.

[0055] When the compressor operating frequency decreases, the temperature inside the housing 3 decreases accordingly. The shape memory metal 2 shrinks axially when it cools down. The shrinkage action causes the tangent part 113 to move towards the stator part 112, which reduces the contact force between the tangent part 113 and the inner wall of the housing 3. As a result, the modal resonance peak frequency of the transmission path between the stator and the housing 3 decreases, thus avoiding overlap with the reduced excitation load frequency.

[0056] If the deformation of the shape memory metal 2 is less than 0.05f, the deformation of the cut edge 113 is insufficient and cannot effectively change the contact force with the inner wall of the shell 3. The adjustment effect of the transmission characteristics between the stator and the shell 3 is weak and it is difficult to meet the requirements of noise and vibration optimization. If the deformation is greater than 0.15f, the shape memory metal 2 is prone to exceed the elastic limit and undergo permanent deformation.

[0057] In this embodiment, please refer to Figure 5 and Figure 6 The shape of shape memory metal 2 includes: spring or sheet.

[0058] Specifically, the shape memory metal 2 is made of a nickel-titanium alloy material with shape memory effect. When designed as a spring shape, it is usually machined into a helical compression spring or a tension spring. The spring-shaped shape memory metal 2 is installed in the gap 114 between the stator part 112 and the cut-edge part 113, with its two ends fixedly connected to the end faces on both sides of the gap 114. The spring structure can provide a large elastic deformation range in the axial direction and has high sensitivity to temperature changes.

[0059] When the shape memory metal 2 is designed as a thin sheet, its thickness is much smaller than its length and width, presenting a sheet-like structure. The thin sheet shape memory metal 2 can be precisely formed by a stamping process, so that its outline matches the geometric dimensions of the gap 114. The two ends of the thin sheet shape memory metal 2 can be flatly attached to the surface of the stator portion 112 and the surface of the cut edge portion 113, respectively, or the two ends of the thin sheet shape memory metal 2 can be embedded in the slots on the stator portion 112 and the slots on the cut edge portion 113, respectively, and the force is transmitted through its expansion and contraction in the planar direction.

[0060] In practical applications, spring-shaped shape memory metal 2 is suitable for situations requiring a large actuation stroke, as its deformation is mainly concentrated in the axial direction, resulting in significant expansion and contraction. Sheet-shaped shape memory metal 2 is more suitable for space-constrained situations, as its force is distributed on a single plane, enabling more uniform stress adjustment of the structure.

[0061] In this embodiment, the two ends of the shape memory metal 2 are respectively connected to the other end of the stator portion 112 and the other end of the cut edge portion 113 by welding or riveting.

[0062] Specifically, the shape memory metal 2 is pre-processed into a specific shape, such as a spring or a sheet, to match the dimensions of the gap 114 between the stator yoke 11. During assembly, the shape memory metal 2 is first placed in the gap 114 formed between the stator part 112 and the cut edge part 113, with its two ends aligned with the end faces of the stator part 112 and the cut edge part 113, respectively.

[0063] When welding is used for connection, laser welding or resistance welding processes are employed. The contact surfaces of the two ends of the shape memory metal 2 with the stator portion 112 and the cut-edge portion 113 are cleaned to remove oxide layers and oil contaminants, ensuring weld quality. During welding, the shape memory metal 2 and the stator assembly are fixed using precision fixtures, and a laser beam or current is concentrated in the connection area, causing localized melting of the materials and forming a metallurgical bond. After welding, non-destructive testing, such as X-ray or ultrasonic inspection, is performed to confirm the weld is defect-free. This connection method offers high strength and airtightness, making it suitable for high-temperature operating environments.

[0064] When riveting is used for connection, the two ends of the shape memory metal 2 are designed with riveting holes or protrusions, and corresponding holes or grooves are also machined on the stator part 112 and the chamfered part 113. The two ends of the shape memory metal 2 are mechanically locked to the base material using rivets or a cold heading process. The riveting process is carried out at room temperature to avoid interference from the heat-affected zone on the performance of the shape memory metal 2. After riveting, the connection point has vibration and fatigue resistance characteristics, facilitating maintenance and replacement.

[0065] Welding or riveting provides a high-strength mechanical connection, ensuring a robust bond between the shape memory metal 2 and the stator structure. Welding achieves atomic-level bonding between the two ends of the shape memory metal 2 and the end faces of the stator portion 112 and the cut edge portion 113 through metallurgical bonding, while riveting achieves physical fixation through mechanical interlocking. This connection method effectively resists vibration and thermal stress during motor operation, preventing loosening or detachment of the connection points, thereby ensuring that the shape memory metal 2 can accurately transmit power when the temperature changes.

[0066] Please see Figure 7 This embodiment also provides a compressor, including: the vibration-damping and noise-reducing stator structure of the above embodiment.

[0067] Specifically, the compressor includes an upper cover assembly 4, a vibration-damping and noise-reducing stator structure, a rotor assembly 5, a pump body assembly 6, a lower cover 7, and a distributor component 8. The pump body assembly 6 is fixed to the lower part of the housing 3 by welding. The crankshaft of the upper part of the pump body assembly 6 is mounted on the rotor assembly 5 by interference fit. The stator body 1 is fixed inside the housing 3 in conjunction with the rotor assembly 5. The upper cover assembly 4 and the lower cover 7 are installed on the upper and lower edges of the housing 3 by welding. The lower end of the distributor component 8 is bent and inserted into the suction port of the pump body assembly 6 and welded to the housing 3.

[0068] More specifically, the compressor housing 3 serves as the main support structure, internally housing the stator body 1 and the rotor assembly 5. The vibration-damping and noise-reducing stator structure, based on the design in the document, includes a stator yoke 11, a chamfered portion 113, and shape memory metal elements 2, used to adapt to temperature changes and reduce vibration noise. The stator body 1 and the rotor assembly 5 cooperate to ensure the stability of the electromagnetic drive.

[0069] The pump body assembly 6 is fixed to the lower part of the housing 3 by welding, providing the foundation for the compression chamber. The crankshaft at the upper end of the pump body assembly 6 is mounted on the rotor assembly 5 by an interference fit. This connection ensures the accuracy and reliability of power transmission. The interference fit is achieved by press-fitting at room temperature, forming a tight contact between the crankshaft and the shaft hole of the rotor assembly 5, preventing relative slippage during operation.

[0070] The stator body 1 is fixed inside the housing 3 in conjunction with the rotor assembly 5. The stator structure adopts the vibration reduction and noise reduction design described in the document, in which the shape memory metal element 2 expands and contracts with temperature changes, dynamically adjusting the bonding force between the stator and the housing 3. During assembly, the stator body 1 and the inner wall of the housing 3 form an initial interference fit.

[0071] The upper cover assembly 4 and the lower cover 7 are welded to the upper and lower edges of the housing 3. The upper cover assembly 4 seals the top of the compressor; the lower cover 7 supports the pump body assembly 6 and provides a bottom seal. The welding process uses laser or arc welding to ensure the airtightness and strength of the connection points.

[0072] The lower bend of the separator component 8 is inserted into the suction port of the pump body assembly 6 and fixed to the housing 3 by welding. The welding point is located in the contact area between the separator and the housing 3, achieving a firm connection.

[0073] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0074] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusivity.

[0075] The term "comprises" implies that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A vibration-damping and noise-reducing stator structure, characterized in that, include: The stator body comprises a stator body and a shape memory metal. The stator body has a stator yoke, and the outer circumference of the stator yoke has at least one flow groove. The stator yoke includes at least one stator portion and at least one truncated portion. One end of the stator portion and one end of the truncated portion are connected. A gap is provided between the other end of the stator portion and the other end of the truncated portion. The gap communicates with the flow groove. The shape memory metal is disposed in the gap, and both ends of the shape memory metal are respectively connected to the other end of the stator portion and the other end of the truncated portion to stretch or contract with temperature changes.

2. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The thickness of the stator yoke is a, and the thickness of the stator is b, satisfying: 0.5a≤b≤0.75a.

3. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The thickness of the stator yoke is a, and the thickness of the tangent portion is c, satisfying: 0.1a≤c≤0.4a.

4. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The thickness of the stator yoke is a, and the width of the gap is d, satisfying: 0.1a≤d≤0.3a.

5. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The width of the gap is d, and the initial axial length of the shape memory metal is f, satisfying: 0.9d≤f≤1.1d.

6. The vibration reduction and noise reduction stator structure according to claim 5, characterized in that, The deformation of the shape memory metal is ∆f, which satisfies: 0.05f≤∆f≤0.15f.

7. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The shape of the shape memory metal includes: spring or sheet.

8. The vibration reduction and noise reduction stator structure according to claim 1, characterized in that, The two ends of the shape memory metal are respectively connected to the other end of the stator and the other end of the cut edge by welding or riveting.

9. The vibration-damping and noise-reducing stator structure according to claim 1, characterized in that, Also includes: The housing has a stator body disposed within it, and the stator body abuts against the inner wall of the housing.

10. A compressor, characterized in that, include: The vibration reduction and noise reduction stator structure as described in any one of claims 1-9.

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