A rotary vibration reduction device and a vertical rotor compressor having the same

Abstract

The present invention provides a rotary vibration damping device and a vertical rotor type compressor having the same, wherein the rotary vibration damping device is installed in the compressor, the rotary vibration damping device comprises a vibration damping body and a connecting member, the vibration damping body is fixedly connected to the compressor through the connecting member, and is used to reduce the vibration of the compressor. The present invention adds a rotary vibration damping device in the compressor, so that when the compressor is running, the vibration energy generated is transferred to the rotary vibration damping device, thereby effectively reducing the vibration of the compressor, reducing noise, and increasing the adaptability of the compressor. The rotary vibration damping device in the present invention has a simple structure and is easy to install and operate.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a rotary vibration reduction device and a vertical rotor type compressor having the same. Background Art

[0002] Rolling rotor compressors are widely used in various electrical equipment, such as refrigerators, air conditioners, freezers, heat pump water heaters, etc. Their main function is to compress the refrigerant gas from a low-temperature and low-pressure state to a high-temperature and high-pressure state.

[0003] The rolling rotor compressor includes a cylinder, a rolling piston, a vane and a cylinder end cover. The rolling piston rolls on the inner circumference of the cylinder. The vane reciprocates along the radial direction of the rotor, and the vane is always in contact with the outer circumference of the rolling piston. The inner circumference of the cylinder, the two cylinder end covers and the rolling piston form a closed cavity, and the position of the closed cavity changes with the rotation of the rotor. The rolling piston rotates inside the cylinder, and the vane divides the closed cavity into a low-pressure cavity and a high-pressure cavity. The cylinder is provided with an air inlet and an exhaust port, the low-pressure cavity is connected to the air inlet, and the high-pressure cavity is connected to the exhaust port.

[0004] During operation, a rolling rotor compressor will form a periodic suction and exhaust pressure difference, which will cause the rolling rotor compressor to produce periodic torque fluctuations, forcing the rolling rotor compressor to produce periodic vibrations, especially in the rotation direction, which is prone to generate noise and limit the adaptability of the rolling rotor compressor. Summary of the invention

[0005] The purpose of the present invention is to provide a rotary vibration reduction device and a vertical rotor compressor having the same, so as to solve the problem in the prior art that the vibration of the rolling rotor compressor in the rotary direction is large, it is easy to generate noise and it will limit the adaptability of the rolling rotor compressor. The specific technical solution is as follows:

[0006] In a first aspect, the present invention provides a rotary vibration reduction device installed in a compressor, comprising a vibration reduction body and a connecting member, wherein the vibration reduction body is fixedly connected to the compressor via the connecting member, and is used to reduce vibration of the compressor.

[0007] Optionally, the natural modal frequency of the rotation vibration reduction device is equal to the operating frequency of the compressor and the vibration direction of the natural modal vibration type is the same as the rotation direction of the compressor.

[0008] Optionally, the vibration-damping body is a circular ring with a C-shaped opening, which is arranged around the periphery of the cylinder of the compressor.

[0009] Optionally, the inner diameter of the ring is larger than the outer diameter of the cylinder.

[0010] Optionally, a plurality of the connecting members are provided, and the plurality of the connecting members are distributed on one side of the vibration damping body used for connecting with the compressor.

[0011] Optionally, there are three connecting members, and the three connecting members are equidistantly arranged.

[0012] Optionally, the connecting member is a Z-shaped connecting member, and connecting holes are provided at both ends of the Z-shaped connecting member, which are respectively used for fixed connection with the vibration reduction body and the compressor.

[0013] Optionally, the connecting hole is a threaded hole, and the connecting member is fixedly connected to the vibration damping body and the compressor by bolts.

[0014] Optionally, the vibration damping body is made of steel, cast iron, copper or aluminum.

[0015] In a second aspect, the present invention provides a vertical rotor compressor installed in an air conditioner, comprising an upper cylinder head, a lower cylinder head, a cylinder and a rotary vibration reduction device as described in the first aspect, wherein the rotary vibration reduction device is arranged around the cylinder and fixedly connected to the upper cylinder head.

[0016] The present invention provides a rotary vibration reduction device and a vertical rotor compressor having the same, which have the following beneficial effects: wherein the rotary vibration reduction device is installed in the compressor, the rotary vibration reduction device comprises a vibration reduction body and a connecting member, the vibration reduction body is fixedly connected to the compressor through the connecting member, and is used to reduce the vibration of the compressor. The present invention adds a rotary vibration reduction device in the compressor, so that when the compressor is running, the vibration energy generated is transferred to the rotary vibration reduction device, thereby effectively reducing the vibration of the compressor, reducing noise, and increasing the adaptability of the compressor. The rotary vibration reduction device in the present invention has a simple structure and is easy to install and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is an assembly diagram of a rotary vibration reduction device in a compressor provided by one embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of assembling a rotary vibration reduction device and an upper cylinder cover of a compressor provided by one embodiment of the present invention;

[0020] Figure 3It is a structural schematic diagram of a rotary vibration reduction device provided by one embodiment of the present invention;

[0021] Figure 4 It is a schematic structural diagram of an upper cylinder cover of a compressor provided by one embodiment of the present invention.

[0022] Among them, Figures 1 to 3 The reference numerals are described as follows:

[0023] 1-upper cylinder cover; 11-waist-shaped hole; 12-threaded hole on the upper cylinder cover; 2-lower cylinder cover; 3-rotation vibration reduction device; 31-vibration reduction body; 32-connecting piece. DETAILED DESCRIPTION

[0024] The following is a further detailed description of a rotary vibration reduction device and a vertical rotor compressor having the same proposed by the present invention in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] The core idea of ​​the present invention is to provide a rotary vibration damping device and a vertical rotor compressor having the same. By adding a rotary vibration damping device in the compressor, the vibration energy generated when the compressor is running is transferred to the rotary vibration damping device, thereby effectively reducing the vibration of the compressor, reducing noise, and increasing the adaptability of the compressor.

[0027] To this end, the present invention provides a rotary vibration reduction device, which is installed in the compressor. Figure 1 , Figure 2 , Figure 3 and Figure 4 , wherein the compressor includes an upper cylinder head 1, a lower cylinder head 2 and a cylinder (not shown in the figure). Specifically, the rotary vibration reduction device 3 is arranged around the cylinder and is fixedly connected to the upper cylinder head 1 for reducing vibration of the compressor.

[0028] Furthermore, the rotary vibration reduction device 3 includes a vibration reduction body 31 and a connecting member 32 , and the vibration reduction body 31 is fixedly connected to the upper cylinder head 1 of the compressor via the connecting member 32 .

[0029] Specifically, the vibration reduction body 31 is a circular ring with a C-shaped opening, which is arranged around the periphery of the cylinder of the compressor. The vibration reduction body 31 is a circular ring, which can ensure that the vibration mode of the rotary vibration reduction device 3 when vibrating is consistent with or very close to the vibration mode of the vibration generated by the operation of the compressor, which is conducive to the resonance of the two. It should be noted that the function of the opening on the vibration reduction body 31 is to avoid the boss structure outside the cylinder when installing the rotary vibration reduction device 3 in the compressor, so as to facilitate the installation operation.

[0030] Furthermore, in order to facilitate the installation of the rotary vibration reduction device 3 in the compressor, the inner diameter of the ring is set to be larger than the outer diameter of the cylinder.

[0031] Furthermore, a plurality of the connecting members 32 are provided, and the plurality of the connecting members 32 are distributed on one side of the vibration reduction body 31 for connecting with the compressor.

[0032] Preferably, three connecting members 32 are provided, and the three connecting members 32 are arranged equidistantly, so that the stability of the connection between the rotary vibration damping device 3 and the compressor can be ensured, thereby ensuring the performance of the rotary vibration damping device 3.

[0033] Furthermore, the connecting member 32 is a Z-shaped connecting member, and connecting holes are provided at both ends of the Z-shaped connecting member, which are respectively used to be fixedly connected to the vibration reduction body 31 and the upper cylinder cover 1.

[0034] Specifically, the connecting hole is a threaded hole, and correspondingly, threaded holes are also provided at corresponding positions of the vibration reduction body 31 and the upper cylinder cover 1, and the connecting member 32 is fixedly connected to the vibration reduction body 31 and the compressor by bolts. Figure 3 The threaded hole 12 on the upper cylinder cover is arranged in a counterclockwise direction on the same side of the waist-shaped hole 11 on the upper cylinder cover. It should be noted that the waist-shaped hole 11 is a mounting hole for installing the upper cylinder cover 1, and the design of the waist-shaped hole can also effectively reduce the weight of the upper cylinder cover 1.

[0035] In this embodiment, it is necessary to make the natural modal frequency of the rotary vibration damping device 3 equal to the operating frequency of the compressor and the vibration direction of the natural modal frequency vibration type is the same as the rotation direction of the compressor, so as to ensure that the rotary vibration damping device 3 generates resonance when the compressor is running. Among them, the natural modal frequency of the rotary vibration damping device 3 can be adjusted by changing the geometric parameters of the vibration damping body 31. For example, when the vibration damping body 31 is a C-shaped ring, it can be adjusted by adjusting the inner diameter, outer diameter or thickness of the ring, or by changing the material of the vibration damping body 31. Preferably, the material of the vibration damping body 31 is steel, cast iron, copper or aluminum. The specific adjustment method is not specifically limited, as long as the natural modal frequency of the rotary vibration damping device 3 is equal to or very close to the operating frequency of the compressor.

[0036] In practical applications, the working principle of the rotary vibration reduction device in the compressor is as follows:

[0037] On the one hand, when the compressor is running, the main vibration direction of the compressor is the rotation direction, and the vibration values ​​generated in the radial direction and the axial direction are relatively small. In this embodiment, the vibration value of the compressor in the rotation direction is mainly reduced by the rotary vibration reduction device 3. Since the natural modal frequency of the rotary vibration reduction device 3 is equal to the operating frequency of the compressor, and the vibration direction of the natural modal vibration type is also consistent with the rotation direction of the compressor, at this time, the mode of the rotary vibration reduction device 3 at this frequency is excited to generate resonance, so that the vibration energy generated when the compressor is running can be transferred to the rotary vibration reduction device 3, so as to achieve the purpose of reducing the vibration value of the compressor in the rotation direction.

[0038] The inventors have concluded, based on many attempts, summaries, repeated tests and calculations, that, for example, the operating frequency of a compressor is 48 Hz. Without the rotary vibration damping device, the maximum vibration value generated in the rotational direction is about 52.6 μm. After the rotary vibration damping device is added to the compressor, the maximum vibration value generated in the rotational direction is about 36.1 μm, a reduction of more than 30%. It can be seen that the vibration reduction effect of the rotary vibration damping device is very obvious.

[0039] On the other hand, the vibration value of the compressor is approximately the ratio of the torque fluctuation value to its own rotational inertia. Due to the limitations of the compressor structure and cost factors, the exhaust volume of the compressor remains unchanged, so its torque fluctuation value remains basically unchanged. However, after the rotary vibration reduction device 3 is installed in the compressor, the overall mass of the compressor is increased, which leads to an increase in the compressor's own rotational inertia, so the vibration value of the compressor will also be slightly reduced.

[0040] In addition, the present invention also provides a vertical rotor compressor installed in an air conditioner, wherein the compressor comprises an upper cylinder cover, a lower cylinder cover, a cylinder and the rotary vibration reduction device as described above.

[0041] In summary, the rotary vibration damping device and the vertical rotor compressor provided by the present invention have the following advantages: wherein the rotary vibration damping device is installed in the compressor, the rotary vibration damping device comprises a vibration damping body and a connecting member, and the vibration damping body is fixedly connected to the compressor through the connecting member, and is used to reduce the vibration of the compressor. The present invention adds a rotary vibration damping device in the compressor, so that when the compressor is running, the vibration energy generated is transferred to the rotary vibration damping device, thereby effectively reducing the vibration of the compressor, reducing noise, and increasing the adaptability of the compressor. In addition, the rotary vibration damping device in the present invention has a simple structure and is easy to install and operate.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A rotary vibration reduction device installed in a compressor, characterized in that: It includes a vibration reduction body and a connecting piece; The vibration reduction body is a circular ring with a C-shaped opening, which is arranged around the periphery of the cylinder of the compressor; The vibration reduction body is fixedly connected to the upper cylinder cover of the compressor through the connecting piece, and is used for reducing vibration of the compressor; The inner diameter of the ring is larger than the outer diameter of the cylinder; The connecting member is a Z-shaped connecting member, and connecting holes are provided at both ends of the Z-shaped connecting member, which are respectively used for fixed connection with the vibration reduction body and the compressor.

2. The rotary vibration reduction device according to claim 1, characterized in that: The natural modal frequency of the rotary vibration reduction device is equal to the operating frequency of the compressor, and the vibration direction of the natural modal vibration type is the same as the rotation direction of the compressor.

3. The rotary vibration reduction device according to claim 1, characterized in that: The inner diameter of the ring is greater than the outer diameter of the cylinder.

4. The rotary vibration reduction device according to claim 1, characterized in that: There are a plurality of connecting members, and the plurality of connecting members are distributed on one side of the vibration-damping body for connecting with the compressor.

5. The rotary vibration reduction device according to claim 4, characterized in that: There are three connecting pieces, and the three connecting pieces are arranged at equal distances.

6. The rotary vibration reduction device according to claim 1, characterized in that: The connecting hole is a threaded hole, and the connecting piece is fixedly connected to the vibration reduction body and the compressor by bolts.

7. The rotary vibration reduction device according to claim 1, characterized in that: The vibration reduction body is made of steel, cast iron, copper or aluminum.

8. A vertical rotor compressor installed in an air conditioner, characterized in that: It comprises an upper cylinder cover, a lower cylinder cover, a cylinder and a rotary vibration reduction device as described in any one of claims 1 to 6, wherein the rotary vibration reduction device is arranged around the cylinder and is fixedly connected to the upper cylinder cover.

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