Compressor damping structure and compressor

Abstract

The utility model provides a kind of compressor vibration reduction structure and compressor, comprising: with the inner wall surface connection of the bottom shell of compressor at least three grid fins, all the grid fins are sequentially arranged around the circumferential of the bottom shell, the length of each grid fin is less than the radius of the inner wall surface of the bottom shell.The compressor vibration reduction structure utilizes the existing liquid in the bottom shell and the beating action of grid fin, directly generates reverse liquid impact force to hinder shell rotation vibration.

Description

Technical Field

[0001] This utility model relates to the field of compressors, and in particular to a compressor vibration reduction structure and a compressor. Background Technology

[0002] During operation, the compressor casing is prone to periodic rotational vibration due to factors such as the high-speed rotation of the internal rotor and pressure fluctuations during gas compression. This vibration not only reduces the compressor's operational stability and shortens the lifespan of core components, but it can also be transmitted to other equipment such as air conditioner outdoor units or refrigerator units through connecting pipes or brackets, causing resonance and noise, thus affecting the user experience.

[0003] Existing vibration reduction methods have significant limitations: internal rotor balancing optimization can only reduce vibrations caused by rotational inertia, with minimal improvement on casing rotational vibrations caused by gas forces and torque fluctuations, and increases processing complexity and cost; casing structural reinforcement, such as thickening the casing wall and adding annular reinforcing ribs, will increase the overall weight of the compressor by 10%-15%, which does not conform to the trend of lightweighting and has limited effect on suppressing medium and high frequency vibrations; external vibration damping and buffering, such as adding rubber damping pads and spring dampers, can only reduce the outward transmission of vibrations, but cannot reduce the vibration amplitude of the casing itself from the source, and the damping components are prone to aging and need to be replaced regularly.

[0004] The compressor housing consists of a top housing, a main housing, and a bottom housing connected sequentially from top to bottom. The inner wall of the bottom housing is a smooth, flat surface. During compressor operation, lubricating oil or refrigerant mixture accumulates in the bottom housing to a height of 5-15 mm. This liquid only serves lubrication and cooling functions and is not used for vibration control. When the housing rotates, the liquid at the bottom rotates synchronously with the housing, without any counterforce to impede the vibration, making it difficult to effectively reduce the vibration amplitude. Therefore, there is an urgent need to design a structure that can inhibit housing vibration at its source. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a compressor vibration damping structure and compressor that can impede the vibration of the casing.

[0006] To solve the above-mentioned technical problems, this utility model provides a compressor vibration reduction structure, including: at least three grid plates disposed inside the bottom housing of the compressor, all of the grid plates being arranged sequentially around the circumference of the bottom housing, and the length of each grid plate being less than the radius of the inner wall surface of the bottom housing.

[0007] Preferably, the grid sheet is connected to the inner wall surface of the bottom housing and / or the inner bottom surface of the bottom housing.

[0008] Preferably, all the grid plates are evenly arranged around the circumference of the bottom housing.

[0009] Preferably, the grid plate is perpendicular to the horizontal direction; or the grid plate is not perpendicular to the horizontal direction, and the grid plate is inclined relative to the horizontal direction.

[0010] Preferably, the grid sheet has a honeycomb or hollow structure.

[0011] Preferably, the edge of the grid sheet that contacts the inner bottom surface is provided with an elastic protrusion or a damping layer.

[0012] Preferably, the height of the bottom surface of the grid plate gradually decreases along the direction from the inner wall surface of the bottom housing to the center of the bottom housing.

[0013] Furthermore, the inner bottom surface of the bottom shell is a horizontal plane, a concave arc surface, or a convex arc surface; when the inner bottom surface is a horizontal plane or a concave arc surface, the thickness of the grid sheet in the height direction increases sequentially from the outside to the inside; when the inner bottom surface is a convex arc surface, the thickness of the grid sheet in the height direction increases sequentially from the outside to the inside, or the thickness of the grid sheet in the height direction remains unchanged.

[0014] Preferably, the grille and the bottom shell are an integral structure; or the grille and the bottom shell are separate structures.

[0015] This utility model also relates to a compressor, including the aforementioned compressor vibration reduction structure.

[0016] As described above, the compressor vibration reduction structure and compressor of this utility model have the following beneficial effects:

[0017] The compressor vibration damping structure utilizes the impact of the existing liquid inside the bottom housing with the grid plates to directly generate a reverse liquid impact force to hinder the rotational vibration of the housing. Therefore, the compressor vibration damping structure can suppress vibration at the source.

[0018] The compressor vibration damping structure has a simple grid structure, requiring no additional drive or control components. The raw material cost increases by only 3-5 yuan per unit, and only requires adding grid welding or integral molding processes in the outer shell processing stage. It is compatible with existing compressor production lines and does not require replacement of core equipment. Therefore, the compressor vibration damping structure is low-cost and easy to implement. The length of each grid is less than the radius of the inner wall of the bottom shell, which can prevent the grid from hitting the oil suction device located in the center of the bottom shell.

[0019] The compressor vibration reduction structure does not change the liquid lubrication and cooling path, and the independent liquid flow channels between adjacent grid plates can ensure normal liquid circulation. It has no negative impact on the compressor's cooling capacity and energy efficiency ratio. Therefore, the compressor vibration reduction structure does not affect the original function.

[0020] This compressor vibration damping structure does not require adjustments to the core design logic based on the compressor type or displacement. It only requires adjustments to the number and size of the grille plates to adapt to different housing dimensions. Therefore, it can be widely used in various compressor products and has strong versatility. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of the compressor in Example 1.

[0022] Figure 2 This is a schematic diagram of the internal structure of the compressor in Example 1.

[0023] Figure 3 This is a schematic diagram of the bottom housing of the compressor vibration damping structure in Example 1.

[0024] Figure 4 This is a three-dimensional structural diagram of the bottom housing of the compressor vibration damping structure in Example 2.

[0025] Figure 5 This is a three-dimensional structural diagram of the bottom housing of the compressor vibration damping structure in Example 3.

[0026] Figure 6 The diagram shows the structure of the compressor vibration damping structure in Example 1, where the grid plate has a hollow structure.

[0027] Figure 7 The diagram shows the honeycomb structure of the compressor vibration damping structure in Example 1.

[0028] Figure 8 This is a schematic diagram of the compressor vibration reduction structure of Example 1, in which a damping layer is provided at the edge where the grid plate contacts the inner bottom surface.

[0029] The numbers in the figure are: 11-bottom shell, 111-inner wall surface, 112-inner bottom surface, 12-main shell, 200-grid plate, 201-large structural plate, 210-damping layer, L-length of grid plate, T-thickness of grid plate in the height direction. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0031] Please refer to the accompanying drawings. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0032] Example 1

[0033] like Figures 1 to 3 As shown, in the compressor vibration damping structure of this embodiment, the compressor housing includes a top housing, a main housing 12 and a bottom housing 11 arranged sequentially from top to bottom; the compressor vibration damping structure includes: at least three grid plates 200 disposed inside the bottom housing 11 of the compressor, all of the grid plates 200 being arranged sequentially around the circumference of the bottom housing 11, and the length L of each grid plate 200 being less than the radius of the inner wall surface 111 of the bottom housing 11.

[0034] This compressor vibration damping structure utilizes the impact of the existing liquid inside the bottom housing 11 with the grid plates 200 to directly generate a reverse liquid impact force to hinder the rotational vibration of the housing. Therefore, this compressor vibration damping structure can suppress vibration at the source. The length L of each grid plate 200 is less than the radius of the inner wall surface 111 of the bottom housing 11, so that there is a space in the middle of the bottom housing 11 to avoid the lower cylinder head. Compared with the existing structure without grid plates 200, this compressor vibration damping structure can reduce the vibration amplitude by 40%-50%, and the suppression effect on mid-to-high frequency vibrations of 200-300Hz is particularly significant.

[0035] The grid plate 200 of the compressor vibration reduction structure has a simple structure, requiring no additional drive or control components. The raw material cost increases by only 3-5 yuan per unit. Furthermore, only the welding or one-piece molding process of the grid plate 200 needs to be added in the outer shell processing stage. It is compatible with existing compressor production lines and does not require the replacement of core equipment. Therefore, the compressor vibration reduction structure is low-cost and easy to implement.

[0036] The vertical height of the grille 200 does not exceed the liquid height at the bottom of the housing, does not change the liquid lubrication and cooling path, and the independent liquid flow channels between adjacent grille 200s ensure normal liquid circulation. Therefore, it has no negative impact on the compressor's cooling capacity or energy efficiency ratio. Thus, this compressor vibration damping structure does not affect its original function. Testing shows that the cooling capacity deviation of this compressor vibration damping structure is ≤1%, and the energy efficiency ratio deviation is ≤0.5%.

[0037] This compressor vibration damping structure does not require adjustments to the core design logic based on compressor type or displacement. It only needs to adjust the number and size of the 200 grid plates to fit different housing dimensions, making it widely applicable to various compressor products. Therefore, this compressor vibration damping structure has strong versatility. The compressor type can be rotary or scroll, and the compressor horsepower ranges from 1 to 5 HP.

[0038] The compressor vibration reduction structure of this utility model includes at least three grid plates 200. When the compressor operation causes the outer casing to rotate and vibrate, the liquid in the bottom shell 11 of the outer casing rotates synchronously with the outer casing. The flowing liquid, blocked by the grid plates 200, will continuously strike the side of the grid plates 200, generating a liquid impact force in the opposite direction of vibration. This liquid impact force is transmitted to the outer casing through the grid plates 200, forming a resisting torque opposite to the direction of the outer casing's rotational vibration, thereby reducing the amplitude of the outer casing's rotational vibration.

[0039] The grid plate 200 is connected to the inner wall surface 111 and / or the inner bottom surface 112 of the bottom housing 11, so that the grid plate 200 can be firmly connected to the bottom housing 11, preventing the grid plate 200 from shifting or loosening when the compressor vibrates. In this embodiment, the grid plate 200 is connected to the inner wall surface 111 and the inner bottom surface 112 of the bottom housing 11.

[0040] like Figure 6 and Figure 7 As shown, the grid plate 200 has a honeycomb or hollow structure, which enables the grid plate 200 to achieve both vibration reduction and lightweighting, as well as cushioning.

[0041] like Figures 1 to 3 As shown, the grid plate 200 is perpendicular to the horizontal direction. This structure allows the liquid in the bottom shell 11 to generate a large liquid impact force during clockwise or counterclockwise rotation.

[0042] The inner bottom surface 112 of the bottom shell 11 is a horizontal plane, a concave arc surface, or a convex arc surface; in this embodiment, the inner bottom surface 112 of the bottom shell 11 is a horizontal plane.

[0043] All the grid plates 200 are evenly arranged around the circumference of the bottom housing 11 to ensure that the liquid impact force is evenly applied to the bottom housing 11, and the grid plates 200 can evenly distribute the vibration force to avoid local stress concentration.

[0044] The vertical height of the top surface of the grid plate 200 is the same as the vertical height of the top surface of the bottom housing 11, so as to prevent the top surface of the grid plate 200 from extending into the main housing 12 above the bottom housing 11 and to prevent the grid plate 200 from interfering with the compressor pump in the main housing 12.

[0045] The bottom housing 11 and the grille 200 are made of the same material, which avoids chemical reactions between the grille 200 and lubricating oil or refrigerant mixture, and ensures that the thermal expansion coefficients of the grille 200 and the outer shell are consistent, preventing loosening during alternating hot and cold operation. The outer shell is made of cast iron or aluminum alloy. The grade of cast iron can be HT200, and the grade of aluminum alloy can be ADC12.

[0046] The bottom housing 11 has a diameter of 180-400mm, and the interior of the bottom housing 11 is provided with 3-8 grid plates 200, with the included angle between adjacent grid plates 200 being 30°-120°. In this embodiment, the interior of the bottom housing 11 is provided with 8 grid plates 200; the included angle between adjacent grid plates 200 is 45°.

[0047] The grating plate 200 and the bottom housing 11 are an integral structure; or the grating plate 200 and the bottom housing 11 are separate structures. The connection method between the grating plate 200 and the bottom housing 11 can be snap-fit, welding, clearance fit, or interference fit. Different connection methods between the grating plate 200 and the bottom housing 11 can adapt to different production processes and assembly requirements.

[0048] When the grating plate 200 is welded, the height of the weld seam shall not be less than the thickness T of the grating plate 200 in the height direction to ensure the connection strength between the grating plate 200 and the shell. The tensile strength of the grating plate 200 and the shell shall be ≥200MPa to prevent the grating plate 200 from falling off during vibration. When the shell material is cast iron, the grating plate 200 is fixed by welding; when the shell material is aluminum alloy, the grating plate 200 is fixed by an integral molding process.

[0049] like Figure 3 and Figure 8As shown, the edge of the grid plate 200 that contacts the inner bottom surface 112 is provided with an elastic protrusion or a damping layer 210. When the grid plate 200 and the bottom shell 11 are an integral structure, the elastic protrusion or damping layer 210 can compensate for the processing error when the grid plate 200 and the bottom shell 11 are integrally formed, reduce the hard contact impact during vibration, and improve vibration reduction stability; when the grid plate 200 and the bottom shell 11 are separate structures, the elastic protrusion or damping layer 210 fills the assembly gap between the grid plate 200 and the bottom shell 11, avoids loose assembly, and at the same time reduces wear during installation and use, extending the service life of the components.

[0050] like Figures 1 to 3 As shown, the inner bottom surface 112 of the bottom shell 11 can be a horizontal plane, a concave arc surface, or a convex arc surface. When the inner bottom surface 112 is a horizontal plane or a concave arc surface, the thickness T of the grid plate 200 in the height direction increases sequentially from the outside to the inside. When the inner bottom surface 112 is a convex arc surface, the thickness T of the grid plate 200 in the height direction increases sequentially from the outside to the inside, or the thickness T of the grid plate 200 in the height direction remains unchanged. This achieves precise structural adaptation for different inner bottom surface 112 shapes. The thickness of the two sides of the grid plate 2000 in the height direction can be the same or different. In this embodiment, when the thickness of the grid plate 200 in the height direction increases sequentially from the outside to the inside, the liquid damping effect can be enhanced.

[0051] The compressor vibration reduction structure optimizes the inner wall surface 112 of the compressor bottom housing 11. By setting grid plates 200 in the existing bottom housing 11, the reverse liquid impact force is generated by the impact of the liquid in the bottom housing 11 with the grid plates 200, thereby hindering the rotational vibration of the housing.

[0052] The compressor in this embodiment includes the compressor vibration damping structure described above.

[0053] Example 2

[0054] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that some of the grid plates 200 are large structural plates 201. The vertical height of the large structural plates 201 is higher than the vertical height of the top surface of the bottom shell 11. When the large structural plates 201 come into contact with the liquid, they have a larger contact area and a greater liquid impact force.

[0055] Example 3

[0056] like Figure 5As shown, the difference between this embodiment and Embodiment 1 is that, according to the actual structural requirements inside the compressor, the arrangement of the grille 200 can also be adjusted, that is, the grille 200 is inclined relative to the inner bottom surface 112 of the bottom housing 11. All grille 200 are large structural pieces 201, and the vertical height of the large structural pieces 201 is higher than the vertical height of the top surface of the bottom housing 11.

[0057] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0058] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A compressor vibration damping structure, characterized in that, include: At least three grid plates (200) are disposed inside the bottom housing (11) of the compressor, and all the grid plates (200) are arranged sequentially around the circumference of the bottom housing (11), and the length of each grid plate (200) is less than the radius of the inner wall surface (111) of the bottom housing (11).

2. The compressor vibration damping structure according to claim 1, characterized in that: The grid plate (200) is connected to the inner wall surface (111) and / or the inner bottom surface (112) of the bottom shell (11).

3. The compressor vibration damping structure according to claim 1, characterized in that: All of the grid plates (200) are evenly arranged around the bottom housing (11) in the circumference.

4. The compressor vibration damping structure according to claim 1, characterized in that: The grid plate (200) is perpendicular to the horizontal direction; or the grid plate (200) is not perpendicular to the horizontal direction, and the grid plate (200) is inclined relative to the horizontal direction.

5. The compressor vibration damping structure according to claim 1, characterized in that: The grid plate (200) has a honeycomb or hollow structure.

6. The compressor vibration reduction structure according to claim 1, characterized in that: The edge of the grid plate (200) that contacts the inner bottom surface (112) is provided with an elastic protrusion or a damping layer (210).

7. The compressor vibration damping structure according to claim 1, characterized in that: The height of the bottom surface of the grid plate (200) gradually decreases along the direction from the inner wall surface (111) of the bottom shell (11) to the center of the bottom shell (11).

8. The compressor vibration reduction structure according to claim 7, characterized in that: The inner bottom surface (112) of the bottom shell (11) is a horizontal plane, a concave arc surface, or a convex arc surface; when the inner bottom surface (112) is a horizontal plane or a concave arc surface, the thickness of the grid plate (200) in the height direction increases sequentially from the outside to the inside; when the inner bottom surface (112) is a convex arc surface, the thickness of the grid plate (200) in the height direction increases sequentially from the outside to the inside, or the thickness of the grid plate (200) in the height direction remains unchanged.

9. The compressor vibration damping structure according to claim 1, characterized in that: The grid plate (200) and the bottom shell (11) are an integral structure; or the grid plate (200) and the bottom shell (11) are separate structures.

10. A compressor, characterized in that: The compressor vibration damping structure includes any one of claims 1 to 9.

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