Balancing block of air conditioner motor

Abstract

The utility model provides an air-conditioning motor balance block, and belongs to the technical field of air-conditioning equipment. The balance block structure solves the problems of motor vibration, noise increase and the like caused by a balance block structure in the prior art. The air conditioner motor balance block comprises an arc-strip-shaped main body, a strip-shaped groove is formed in the middle of the top face of the main body, the length direction of the strip-shaped groove is arranged in the radial direction of the main body, and the two ends of the strip-shaped groove penetrate through the inner side face and the outer side face of the main body respectively. The outer edge of the top face of the main body is provided with arc-shaped protruding parts symmetrically arranged on the two sides of the strip-shaped groove, and the top faces of the two ends of the main body are downwards-concave step faces. According to the utility model, vibration and noise generated in the rotation process of the motor can be reduced on the basis of ensuring the good balance effect of the air conditioner motor balance block.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-conditioning equipment and relates to a balancing block for an air-conditioning motor. Background Art

[0002] An air conditioner is a mechanical device that uses a compressor to compress the refrigerant, and then cools and evaporates it to deliver cold or heat into the room or car to achieve a cooling or heating effect. The compressor is one of the core components of an air conditioner. It is a driven fluid machine that lifts low-pressure gas to high-pressure gas. The output shaft of the motor is connected to the crankshaft of the compressor and drives it to rotate. However, due to the eccentric setting of the crankshaft, the crankshaft will generate unbalanced inertial force when rotating at high speed, causing strong vibration and noise, and imbalance problems, which will affect the stability of the compressor. Therefore, it is necessary to install a balancing block on the rotor of the air conditioner motor to offset the force of the eccentric part of the crankshaft on the motor shaft, so that the force on the motor shaft is balanced during operation, thereby ensuring the stability of the motor and the reliability of the compressor.

[0003] The structure of the existing air conditioner motor balance block is such as an improved structure of a compressor motor rotor balance block disclosed in a patent document (application number: 200510014924.8). The balance block is composed of an upper protrusion and a lower base integrally formed in an arc shape, with both ends of the base extending inwardly, and the end surface of the inwardly extending portion is a protrusion surface, and a through hole is set in the center of the inwardly extending portion of the two ends of the base. The balance block has the following shortcomings in actual use: when the motor is running, the air inside the motor will contact the surface of the balance block, and the balance block is relatively thick and has a large airflow resistance surface, so more air will contact the surface of the balance block and be disturbed, forming a large air resistance and air vibration, which will cause problems such as motor vibration and increased noise. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and to propose an air-conditioning motor balancing block. The technical problem solved by the utility model is: how to reduce the vibration and noise generated during the rotation of the motor while ensuring a good balancing effect of the air-conditioning motor balancing block.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an air-conditioning motor balancing block, comprising an arc-shaped strip-shaped main body, characterized in that a strip groove is provided in the middle of the top surface of the main body, the length direction of the strip groove is arranged along the radial direction of the main body, and the two ends of the strip groove respectively penetrate the inner side surface and the outer side surface of the main body, and the outer edge of the top surface of the main body has an arc-shaped protrusion symmetrically arranged on both sides of the strip groove, and the top surfaces at both ends of the main body are downwardly concave step surfaces.

[0006] The strip groove is located in the middle of the main body and the arc-shaped protrusions are symmetrically arranged on both sides of the strip groove, so that the mass distribution of the balancing block is uniform, so that the rotation center of gravity of the motor can be adjusted by the arc-shaped protrusions, so that the balancing block has a better balancing effect. In addition, by arranging the arc-shaped protrusions on the edge of the main body to achieve counterweight and adjust the rotation center of gravity of the motor, the airflow resistance surface of the balancing block can be smaller, and the air resistance and airflow disturbance generated during the rotation of the balancing block can be reduced, thereby reducing noise. In addition, the balancing block is also provided with a strip groove arranged radially and passing through both ends on the top surface of the main body, so that when the balancing block rotates with the motor, the air contacting the surface of the balancing block can also smoothly pass through the strip groove and be released from the end of the strip groove, thereby further reducing the possibility of air vibration being transmitted to the surrounding environment, reducing the generation of vibration and noise. In addition, the top surfaces of the two ends of the main body are downwardly concave step surfaces, which can not only reduce the material cost, but also have the function of providing air circulation, so that the air resistance and noise generated during the rotation of the motor can be further reduced.

[0007] In the above-mentioned air-conditioning motor balance block, the outer side surface and the inner side surface of the arc-shaped protrusion are both arc-shaped surfaces, the outer side surface of the arc-shaped protrusion is coplanar with the outer side surface of the main body, and the inner side surface of the arc-shaped protrusion is connected to the top surface of the main body through an arc-shaped transition surface. This design adopts multiple arc surface structures, which can avoid stress concentration and improve the strength and service life of the balance block. In addition, the arc surface structure can also reduce the air resistance formed when air flows through the surface of the balance block, improve the eddy current phenomenon generated when air flows through the surface of the balance block, and thus reduce the vibration and noise generated during the rotation of the motor.

[0008] In the above-mentioned air-conditioning motor balance block, the outer side surfaces at both ends of the main body are flat surfaces, and the flat surfaces at both ends of the main body are parallel, and the two flat surfaces are connected to the inner side surface of the main body through arc-shaped end surfaces. Flat surfaces are more convenient to manufacture and process, and can achieve higher processing accuracy. Therefore, during processing, by accurately adjusting the size of the flat surface, the mass distribution uniformity of the balance block can be ensured to be better, so that the balance block can better adjust the rotation center of gravity of the motor, so that the balance block has a better balancing effect. In addition, the setting of the flat surface can also reduce material costs, so that the balance block can achieve a good balancing effect with less material usage.

[0009] In the above-mentioned air conditioner motor balance block, the end surface of one end of the arc-shaped protrusion is coplanar with the side wall of the strip groove, and the end surface of the other end of the arc-shaped protrusion is coplanar with the adjacent flat surface. This design ensures that the arc-shaped protrusion has a longer length, so that it can achieve a good counterweight effect, so as to better adjust the rotation center of gravity of the motor, so that the balance block has a better balance effect.

[0010] In the above-mentioned air conditioner motor balance block, a first rivet hole is opened in the middle of the strip groove, and a second rivet hole is opened in the middle of the step surface. This design enables the balance block to be more stably fixed on the rotor end face, making the motor run more stably and with lower noise.

[0011] In the above-mentioned air-conditioning motor balance block, a positioning hole is respectively opened on the main body between each second rivet hole and the strip groove, and the diameter of the first rivet hole and the second rivet hole are the same and smaller than the diameter of the positioning hole. When the balance block is installed, the corresponding rotor core end face also has an assembly hole at the same position as the positioning hole. Before assembling the rivet, first check whether the positioning hole is aligned with the assembly hole on the rotor core, and then drive rivets into the first rivet hole and the second rivet hole respectively after confirming the alignment, so as to realize the installation and fixation of the balance block on the rotor core. This method can ensure the accurate installation position of the balance block, reduce the installation error, enable the balance block to better adjust the rotation center of gravity of the motor, and make the balance block have a better balancing effect.

[0012] Compared with the prior art, the air conditioner motor balance block has the following advantages:

[0013] 1. The top surface of the main body of the balance block is provided with a strip groove which is arranged radially and passes through both ends, so that when the balance block rotates with the motor, the air contacting the surface of the balance block can smoothly pass through the strip groove and be released from the end of the strip groove, thereby further reducing the possibility of air vibration being transmitted to the surrounding environment and reducing the generation of vibration and noise.

[0014] 2. The strip groove is located in the middle of the main body and the arc-shaped protrusions are symmetrically arranged on both sides of the strip groove, so that the mass of the balancing block is evenly distributed. In this way, the rotation center of gravity of the motor can be adjusted through the arc-shaped protrusions, so that the balancing block has a better balancing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the balance block. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the balance block. Figure 2 .

[0017] Figure 3 It is a structural diagram of the balance block from the top surface perspective.

[0018] Figure 4 It is a structural diagram of the balance block from the bottom surface perspective.

[0019] In the figure, 1, main body; 2, strip-shaped groove; 3, arc-shaped protrusion; 4, flat surface; 5, step surface; 6, arc-shaped transition surface; 7, positioning hole; 8, arc-shaped end surface; 9, first rivet hole; 10, second rivet hole. DETAILED DESCRIPTION

[0020] The following is a specific embodiment of the present invention and combined with the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to this embodiment.

[0021] This air conditioning motor balance block is mainly used in automobile air conditioning compressors, such as Figures 1 to 4 As shown, the present air conditioner motor balance block includes a main body 1 in the shape of an arc strip, characterized in that a strip groove 2 is provided in the middle of the top surface of the main body 1, the length direction of the strip groove 2 is arranged along the radial direction of the main body 1, and the two ends of the strip groove 2 respectively penetrate the inner side surface and the outer side surface of the main body 1, and the outer edge of the top surface of the main body 1 has an arc-shaped protrusion 3 symmetrically arranged on both sides of the strip groove 2, and the top surface of the two end portions of the main body 1 is a downwardly concave step surface 5. The outer side surface and the inner side surface of the arc-shaped protrusion 3 are both arc-shaped surfaces, the outer side surface of the arc-shaped protrusion 3 is coplanar with the outer side surface of the main body 1, and the inner side surface of the arc-shaped protrusion 3 and the top surface of the main body 1 are connected by an arc-shaped transition surface 6.

[0022] like Figures 2 to 3 As shown, the outer side surfaces at both ends of the main body 1 are flat surfaces 4, and the flat surfaces 4 at both ends of the main body 1 are parallel, and the two flat surfaces 4 are connected to the inner side surface of the main body 1 through the arc-shaped end surface 8. The end surface of one end of the arc-shaped protrusion 3 is coplanar with the adjacent groove wall, and the end surface of the other end of the arc-shaped protrusion 3 is coplanar with the adjacent flat surface 4. This design ensures that the arc-shaped protrusion 3 has a longer length, so that it can achieve a good counterweight effect, so as to better adjust the rotation center of gravity of the motor, so that the balance block has a better balancing effect.

[0023] like Figure 3 and Figure 4 As shown, a first rivet hole 9 is provided in the middle of the strip groove 2, and a second rivet hole 10 is provided in the middle of the step surface 5. Positioning holes 7 are provided on the main body 1 between each second rivet hole 10 and the strip groove 2, and the diameters of the first rivet hole 9 and the second rivet hole 10 are the same and smaller than the diameter of the positioning hole 7. When the balancing block is installed, the corresponding rotor core end face also has an assembly hole at the same position as the positioning hole 7. Before assembling the rivet, check whether the positioning hole 7 is aligned with the assembly hole on the rotor core. After confirming the alignment, rivets are driven into the first rivet hole 9 and the second rivet hole 10 respectively to achieve the installation and fixation of the balancing block on the rotor core. This method can ensure the accurate installation position of the balancing block, reduce the installation error, enable the balancing block to better adjust the rotation center of gravity of the motor, and enable the balancing block to have a better balancing effect.

[0024] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0025] Although this article uses more terms such as 1, main body; 2, strip groove; 3, 4, arc-shaped protrusion; 5, step surface; 6, arc-shaped transition surface; 7, flat surface; 8, arc-shaped end surface; 9, first rivet hole; 10, second rivet hole; 11, positioning hole, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An air conditioner motor balancing block, comprising a main body (1) in the shape of an arc strip, characterized in that: The main body (1) has a strip groove (2) in the middle of the top surface, the length direction of the strip groove (2) is arranged along the radial direction of the main body (1), and the two ends of the strip groove (2) respectively penetrate the inner side surface and the outer side surface of the main body (1), and the outer edge of the top surface of the main body (1) has arc-shaped protrusions (3) symmetrically arranged on both sides of the strip groove (2), and the top surfaces at both ends of the main body (1) are downwardly concave step surfaces (5).

2. The air conditioner motor balancing block according to claim 1, characterized in that: The outer side surface and the inner side surface of the arc-shaped protrusion (3) are both arc-shaped surfaces; the outer side surface of the arc-shaped protrusion (3) is coplanar with the outer side surface of the main body (1); and the inner side surface of the arc-shaped protrusion (3) is connected to the top surface of the main body (1) via an arc-shaped transition surface (6).

3. The air conditioner motor balancing block according to claim 1, characterized in that: The outer side surfaces at both ends of the main body (1) are flat surfaces (4), and the flat surfaces (4) at both ends of the main body (1) are parallel to each other. The two flat surfaces (4) are connected to the inner side surface of the main body (1) via arc-shaped end surfaces (8).

4. The air conditioner motor balancing block according to claim 1, 2 or 3, characterized in that: The end surface of one end of the arc-shaped protrusion (3) is coplanar with the side wall of the strip-shaped groove (2), and the end surface of the other end of the arc-shaped protrusion (3) is coplanar with the adjacent flat surface (4).

5. The air conditioner motor balancing block according to claim 1, 2 or 3, characterized in that: A first rivet hole (9) is provided in the middle of the strip-shaped groove (2), and a second rivet hole (10) is provided in the middle of the step surface (5).

6. The air conditioner motor balancing block according to claim 5, characterized in that: A positioning hole (7) is respectively provided on the main body (1) between each second rivet hole (10) and the strip-shaped groove (2); the diameters of the first rivet hole (9) and the second rivet hole (10) are the same and smaller than the diameter of the positioning hole (7).

Images