A compressor with a damping structure

Abstract

This invention provides a compressor with a damping structure. The compressor includes a housing; a first damping structure, which includes a first spring and a first counterweight arranged along the axial direction of the compressor, with one end of the first spring connected to the inner wall of the housing and the other end of the first spring connected to the first counterweight; and a second damping structure, which includes a second spring and a second counterweight arranged along the radial direction of the compressor, with at least two second springs evenly spaced, one end of the second spring connected to the inner wall of the housing and the other end of the second spring connected to the second counterweight. This invention can counteract the force pulsation of axial movement and radial oscillation of the compressor through the first and second damping structures, transferring the vibration energy of the compressor on a large scale to the first and second damping structures for energy absorption and cancellation.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a compressor with a damping structure. Background Technology

[0002] Vibration, radial runout, and axial sway in miniaturized air compressors present a series of systemic engineering challenges. The core issue lies in the inherent contradiction between the rapid increase in system energy density and the significant reduction in structural stiffness and dynamic stability margin.

[0003] Specifically, to achieve miniaturization and high efficiency, modern compressors generally employ high-speed motor technology, with speeds reaching tens of thousands of revolutions per minute. According to the principles of dynamics, the residual unbalanced mass of rotating parts, caused by unavoidable manufacturing tolerances, results in an excitation force proportional to the square of the rotational speed. This means that a small increase in rotational speed will lead to a quadratic increase in excitation force, becoming a strong vibration source. Simultaneously, the use of thin-walled structures and lightweight components to reduce weight and size objectively leads to a decrease in the overall structural stiffness of key load-bearing components such as the compressor housing, bearing housing, and main shaft. A system with lower stiffness will generate a larger amplitude when subjected to the same excitation force. More importantly, the system's natural frequency will decrease due to the reduced stiffness, making it more susceptible to coupling with the high-frequency excitation force generated by high rotational speeds, thus triggering severe structural resonance. Even a small imbalance can be drastically amplified into considerable overall machine vibration. Summary of the Invention

[0004] To address the shortcomings of the prior art, this utility model provides a compressor with a damping structure, which can counteract the force pulsation of axial movement and radial oscillation of the compressor through a first damping structure and a second damping structure, and transfer the vibration energy of the compressor on a large scale to the first damping structure and the second damping structure for energy absorption and cancellation.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a compressor with a damping structure, the compressor comprising: shell; A first damping structure, comprising a first spring and a first counterweight arranged along the axial direction of the compressor, wherein one end of the first spring is connected to the inner wall of the housing, and the other end of the first spring is connected to the first counterweight; and The second damping structure includes a second spring and a second counterweight arranged in the radial direction of the compressor. The number of the second springs is at least two and they are evenly spaced. One end of the second spring is connected to the inner wall of the outer casing, and the other end of the second spring is connected to the second counterweight.

[0006] In some implementations, the first damping structure further includes a guide rod, which passes through the inside of the first spring. One end of the guide rod is connected to the inner wall of the housing, and the other end is connected to the first counterweight. By setting the guide rod, the extension and retraction of the first spring is guided, ensuring that the first damping structure can effectively resist the force pulsation that causes axial movement.

[0007] In some implementations, a damping medium is provided between the first spring and the guide rod. Combined with the damping medium, the energy of the vibration frequency can be better absorbed and canceled.

[0008] In some implementations, the first counterweight and the second counterweight overlap in the axial direction of the compressor, with the first counterweight connecting to the second counterweight, so that the first damping structure and the second damping structure can play a joint role in energy absorption and cancellation.

[0009] In some implementations, the upper surface of the second counterweight is formed with a limiting groove for fitting the first counterweight, ensuring that there is no collision between the first and second counterweights and avoiding unnecessary vibration.

[0010] In some implementations, the housing includes a bottom shell and a top cover that is sealed to the bottom shell; One end of the first spring is connected to the inner wall of the top cover, and one end of the second spring is connected to the inner wall of the bottom shell, so that the first and second counterweights can maintain a good positional relationship with the vibration source, thereby playing a good role in energy absorption and cancellation.

[0011] In some implementations, the housing includes a bottom shell and a top cover that is sealed to the bottom shell; One end of the first spring and one end of the second spring are both connected to the inner wall of the top cover; The first counterweight and the second counterweight are connected as a single unit to ensure that there is no wobbling between the first counterweight and the second counterweight, thereby avoiding unnecessary vibration.

[0012] In some implementations, the compressor further includes a motor structure installed inside the housing; The first spring corresponds to the axial position of the motor structure, making the first counterweight and the vibration source coaxial, thus achieving better energy absorption and cancellation.

[0013] In some implementations, there are three second springs, which are evenly spaced and provide stable installation of the second counterweight in three different directions and uniform energy dissipation.

[0014] In some implementations, the total weight of the first counterweight and the second counterweight is 'a', and the total weight of the compressor is 'b'. The following relationship is satisfied between 'a' and 'b': 0.1%b < a < 1%b, which effectively counteracts force pulsations that cause axial movement and radial oscillation.

[0015] In summary, this utility model has at least the following advantages: This utility model provides a compressor with a damping structure. By setting a first damping structure in the axial direction and a second damping structure in the radial direction of the compressor, when the compressor vibrates at a specific frequency, the first and second damping structures are excited to enter a resonance state, transferring the vibration energy of the compressor to the first and second counterweights on a large scale, and dissipating it through the first and second springs. The inertial force generated by the first and second counterweights is opposite in phase to the excitation force of the compressor, forming a dynamic cancellation effect, which can directly counteract the force pulsation that causes axial movement and radial oscillation, thereby controlling the amplitude of these harmful movements within an ideal range. Attached Figure Description

[0016] Figure 1 This is a front view of the compressor provided in Embodiment 1 of the present invention; Figure 2 A top view of the interior of the outer shell provided in Embodiment 1 of this utility model; Figure 3 A front view of the compressor provided in Embodiment 2 of this utility model; Figure 4 Another front view of the compressor provided in Embodiment 2 of this utility model; Figure 5 This is a front view of the compressor provided in Embodiment 3 of this utility model; Marked in the image: 100. Outer shell; 110. Bottom shell; 120. Top cover; 200. First damping structure; 210. First spring; 220. First counterweight; 300. Second damping structure; 310. Second spring; 320. Second counterweight; 321. Limiting groove; 400. Motor structure. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Example 1: Please see Figure 1 and Figure 2 A compressor with a damping structure, the compressor includes a housing 100, a first damping structure 200 and a second damping structure 300.

[0022] The outer casing 100 is used to fix the various components of the compressor together, serving as a limit for installation and preventing the components from loosening or shifting during operation. It also prevents dust, moisture, and other foreign objects from entering, thus avoiding damage to some precision parts inside the compressor.

[0023] The first damping structure 200 includes a first spring 210 and a first counterweight 220 arranged along the axial direction of the compressor. One end of the first spring 210 is connected to the inner wall of the outer casing 100, and the other end of the first spring 210 is connected to the first counterweight 220.

[0024] The second damping structure 300 includes a second spring 310 and a second counterweight 320 arranged in the radial direction of the compressor. There are at least two second springs 310 and they are evenly spaced. One end of the second spring 310 is connected to the inner wall of the outer casing 100, and the other end of the second spring 310 is connected to the second counterweight 320.

[0025] By directly connecting the first spring 210 of the first damping structure 200 and the second spring 310 of the second damping structure 300 to the inner wall of the outer casing 100, the first counterweight 220 and the second counterweight 320 can absorb the vibration generated by the operation of the internal parts of the compressor in the first instance, which can prevent the vibration from being directly transmitted to the outer casing 100 and causing resonance. In addition, after the vibration is reduced, the outer casing 100 will not produce a lot of noise due to shaking, which can block the internal noise from being transmitted outward, making the compressor run more quietly. After reducing the vibration impact, the wear of the outer casing 100 and the internal parts will be reduced, which can reduce the probability of parts loosening and damage, and extend the service life of the compressor.

[0026] Specifically, one end of the first spring 210 is connected to the inner wall of the outer casing 100 by welding or snap-fit ​​connection, located in the upper space inside the outer casing 100, and the first spring 210 and the first counterweight 220 are coaxial. The first counterweight 220 plays a certain limiting role through the first spring 210. During vibration, the vibration energy of the compressor is transferred axially to the first counterweight 220 and dissipated through the first spring 210. The inertial force generated by the first counterweight 220 is opposite in phase to the excitation force of the compressor, forming a dynamic cancellation effect, which can directly counteract the force pulsation that causes axial movement.

[0027] Similarly, one end of the second spring 310 is connected to the inner wall of the outer casing 100 by welding or snap-fit ​​connection, located in the upper space inside the outer casing 100, and the second spring 310 and the second counterweight 320 are distributed along the radial direction of the compressor. The other end of the second spring 310 is connected to the second counterweight 320. In one example, there are three second springs 310, which are evenly spaced along the radial direction of the compressor. The three second springs 310 provide stable installation of the second counterweight 320 in three different directions and uniform energy dissipation. During vibration, the vibration energy of the compressor is transferred radially to the second counterweight 320 and dissipated through the three second springs 310. The inertial force generated by the second counterweight 320 is opposite in phase to the excitation force of the compressor, forming a dynamic cancellation effect, which can directly counteract the force pulsation that causes radial oscillation.

[0028] This embodiment provides a compressor with a damping structure. By setting a first damping structure 200 in the axial direction and a second damping structure 300 in the radial direction of the compressor, when the compressor vibrates at a specific frequency, the first damping structure 200 and the second damping structure 300 will be excited to enter a resonance state, transferring the vibration energy of the compressor to the first counterweight 220 and the second counterweight 320 on a large scale, and dissipating it through the first spring 210 and the second spring 310. The inertial force generated by the first counterweight 220 and the second counterweight 320 is opposite in phase to the excitation force of the compressor, forming a dynamic cancellation effect, which can directly counteract the force pulsation that causes axial movement and radial oscillation, thereby controlling the amplitude of these harmful movements within an ideal range.

[0029] Example 2: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figure 1 and Figure 2 Based on the above Figure 3 and Figure 4 .

[0030] In this embodiment, the first damping structure 200 further includes a guide rod, which passes through the first spring 210. One end of the guide rod is connected to the inner wall of the outer shell 100, and the other end of the guide rod is connected to the first counterweight 220. By setting the guide rod, the extension and retraction of the first spring 210 are guided, ensuring that the first damping structure 200 can better resist the force pulsation that causes axial movement.

[0031] Specifically, since the guide rod is fixed in position and has rigidity, it can ensure that the first spring 210 always stretches and contracts along the guide rod when absorbing and canceling the vibration energy of the compressor, thereby further reducing the swaying of the first counterweight 220 and avoiding unnecessary vibration effects.

[0032] Furthermore, a damping medium is provided between the first spring 210 and the guide rod. Combined with the damping medium, it can better absorb and cancel the energy of the vibration frequency.

[0033] For example, the damping medium is made of high molecular polymer rubber, which has good elasticity, can absorb vibration energy like a sponge, and can also block the transmission of noise. At the same time, it is not easy to age and harden, nor is it easy to be corroded by water or oil. It can maintain the damping effect for a long time. In one example, the damping medium is wrapped around the outer surface of the guide rod and located inside the first spring 210.

[0034] In some embodiments, the first counterweight 220 and the second counterweight 320 overlap in the axial direction of the compressor, and the first counterweight 220 is connected to the second counterweight 320, so that the first damping structure 200 and the second damping structure 300 play a joint role in energy absorption and cancellation.

[0035] In one example, the upper end face of the second counterweight 320 is formed with a limiting groove 321 for fitting the first counterweight 220, ensuring that there is no radial sway between the first counterweight 220 and the second counterweight 320, and avoiding unnecessary vibration effects.

[0036] Understandably, the shape of the limiting groove 321 matches the shape of the first counterweight 220. For example, if the first counterweight 220 is rectangular, then the corresponding limiting groove 321 is a rectangular groove; if the first counterweight 220 is cylindrical, then the corresponding limiting groove 321 is a cylindrical groove. During assembly, the first spring 210 is first connected to the outer shell 100 and the first counterweight 220, and multiple second springs 310 are connected to the outer shell 100 and the second counterweight 320. Then, the first counterweight 220 is confined within the limiting groove 321 on the second counterweight 320, establishing a connection between the first counterweight 220 and the second counterweight 320, thus avoiding unnecessary shaking or collisions during the absorption and dissipation of vibration sources.

[0037] Furthermore, the outer casing 100 includes a bottom casing 110 and a top cover 120 that is sealed to the bottom casing 110; one end of the first spring 210 is connected to the inner wall of the top cover 120, and one end of the second spring 310 is connected to the inner wall of the bottom casing 110, so that the first counterweight 220 and the second counterweight 320 can maintain a good positional relationship with the vibration source, thereby playing a good role in energy absorption and cancellation.

[0038] Specifically, the outer side wall of the bottom shell 110 and the inner side wall of the top cover 120 are connected together. During the assembly process, the connection between the first damping structure 200 and the lower end face of the top cover 120, and the connection between the second damping structure 300 and the inner side wall of the bottom shell 110 are completed first. Then, the top cover 120 is aligned and fastened to the bottom shell 110. When the top cover 120 is fastened in place, the first counterweight 220 is also fitted into the limiting groove 321 on the second counterweight 320.

[0039] In another example, the outer casing 100 includes a bottom casing 110 and a top cover 120 that is sealed to the bottom casing 110. One end of the first spring 210 and one end of the second spring 310 are both connected to the inner wall of the top cover 120. The first counterweight 220 and the second counterweight 320 are connected as a single structure to ensure that there is no wobbling between the first counterweight 220 and the second counterweight 320, thereby avoiding unnecessary vibration.

[0040] Specifically, during the assembly process, the connection between the first damping structure 200 and the lower end face of the top cover 120, and the connection between the second damping structure 300 and the inner side wall of the top cover 120 are first completed. Then, the top cover 120 is aligned and fastened to the bottom shell 110. Finally, fasteners or welding are used to ensure the connection stability between the top cover 120 and the bottom shell 110.

[0041] Example 3: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figure 1 and Figure 2 Based on the above Figure 5 .

[0042] In this embodiment, the compressor also includes a motor structure 400, which is installed inside the housing 100; the first spring 210 corresponds to the axial position of the motor structure 400, so that the first counterweight 220 is coaxial with the vibration source, thereby playing a better role in energy absorption and cancellation.

[0043] Specifically, the motor structure 400 is installed in the lower space inside the housing 100, while the first damping structure 200 is located in the upper space inside the housing 100. The first spring 210 is coaxial with the axis of the motor structure 400, that is, coaxial with the axis of the rotor.

[0044] In some implementations, the total weight of the first counterweight 220 and the second counterweight 320 is denoted as a, and the total weight of the compressor is denoted as b. The following relationship is satisfied between a and b: 0.1%b < a < 1%b, which effectively counteracts force pulsations that cause axial movement and radial oscillation.

[0045] In one example, the total weight a of the first counterweight 220 and the second counterweight 320 is 50g, and the total weight b of the compressor is 7000g.

[0046] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A compressor with a damping structure, characterized in that, The compressor includes: Outer shell (100); A first damping structure (200) includes a first spring (210) and a first counterweight (220) arranged along the axial direction of the compressor. One end of the first spring (210) is connected to the inner wall of the housing (100), and the other end of the first spring (210) is connected to the first counterweight (220). The second damping structure (300) includes a second spring (310) and a second counterweight (320) arranged in the radial direction of the compressor. The number of the second springs (310) is at least two and they are evenly spaced. One end of the second spring (310) is connected to the inner wall of the outer casing (100), and the other end of the second spring (310) is connected to the second counterweight (320).

2. The compressor with damping structure according to claim 1, characterized in that, The first damping structure (200) also includes a guide rod, which passes through the first spring (210), and one end of the guide rod is connected to the inner wall of the outer shell (100), and the other end of the guide rod is connected to the first counterweight (220).

3. The compressor with damping structure according to claim 2, characterized in that, A damping medium is provided between the first spring (210) and the guide rod.

4. The compressor with damping structure according to claim 1, characterized in that, The first counterweight (220) and the second counterweight (320) overlap in the axial direction of the compressor, and the first counterweight (220) is connected to the second counterweight (320).

5. The compressor with damping structure according to claim 4, characterized in that, The upper end surface of the second counterweight (320) is formed with a limiting groove (321) for fitting the first counterweight (220).

6. The compressor with damping structure according to claim 5, characterized in that, The outer casing (100) includes a bottom shell (110) and a top cover (120) that is sealed to the bottom shell (110). One end of the first spring (210) is connected to the inner wall of the top cover (120), and one end of the second spring (310) is connected to the inner wall of the bottom shell (110).

7. The compressor with damping structure according to claim 4, characterized in that, The outer casing (100) includes a bottom shell (110) and a top cover (120) that is sealed to the bottom shell (110). One end of the first spring (210) and one end of the second spring (310) are both connected to the inner wall of the top cover (120); The first counterweight (220) and the second counterweight (320) are connected as a single unit.

8. The compressor with damping structure according to claim 1, characterized in that, The compressor also includes a motor structure (400) which is installed inside the housing (100); The first spring (210) corresponds to the axial position of the motor structure (400).

9. The compressor with damping structure according to claim 1, characterized in that, The number of the second spring (310) is 3, and the 3 second springs (310) are evenly spaced.

10. The compressor with a damping structure according to any one of claims 1-9, characterized in that, it is provided with The total weight of the first counterweight (220) and the second counterweight (320) is a, and the total weight of the compressor is b. The following relationship is satisfied between a and b: 0.1%b < a < 1%b.

Images