Motor air gap automatic adjusting device for refrigeration compressor

Abstract

The utility model discloses an automatic motor air gap adjusting device for a refrigeration compressor, which comprises a fixed seat, a plurality of mounting surfaces are arranged at intervals in the circumferential direction of the fixed seat, the mounting surfaces are connected with bendable feeler gauge sheets, each feeler gauge sheet comprises a fixed sheet, one end of each fixed sheet is connected with the corresponding mounting surface, and the other end of each fixed sheet is connected with the corresponding mounting surface. The adjusting piece is connected with the fixing piece, the adjusting piece is of a wedge-shaped structure, and the adjusting piece is gradually thinned from the end close to the fixing piece to the end away from the fixing piece. According to the utility model, the fixed seat is arranged on the rotor and is provided with the stator, the adjusting sheet is arranged between the rotor and the stator, and the adjusting sheet is of a wedge-shaped structure, so that when the thickness of the contact part of the adjusting sheet with the stator and the rotor is greater than an air gap, the adjusting sheet automatically slides upwards under the simultaneous extrusion of the stator and the rotor; and the thickness of the adjusting sheet meets the air gap requirement. And meanwhile, the adjusting sheet is of a wedge-shaped structure, so that the motor air gap requirements of different refrigeration compressors can be met, and the adaptability of the adjusting device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to an automatic air gap adjusting device for the motor of a refrigeration compressor. Background Art

[0002] In a refrigeration compressor, the stator and the rotor cooperate closely to jointly complete the gas compression process. The stator generates a directional magnetic field to drive the rotor to rotate, and the rotor generates a compression channel and compresses the gas by rotating. Their interaction enables the compressor to operate efficiently and stably, providing the necessary refrigeration effect for the refrigeration system. During the assembly of the motor rotor and stator of a refrigeration compressor, a certain gap needs to be ensured between the stator and the rotor.

[0003] The gap between the stator and rotor of the motor of a refrigeration compressor is called the air gap. When the air gap between the stator and the rotor is uneven, the magnetic field strength at different positions will be different, resulting in an unbalanced force on the rotor during rotation, thereby generating vibration. This vibration will not only affect the stable operation of the compressor, but also increase the noise and interfere with the working environment. At the same time, the air gaps of different models of compressors are different, and an air gap adjusting device is needed to adapt to different air gap requirements, thereby improving work efficiency. Summary of the Invention

[0004] The purpose of the utility model is to solve the problem of uneven assembly of the air gap between the rotor and the stator in the assembly of the motor of a refrigeration compressor in view of the prior art, and provide an automatic air gap adjusting device for the motor of a refrigeration compressor.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] An automatic air gap adjusting device for the motor of a refrigeration compressor, comprising a fixed seat, a plurality of mounting surfaces are arranged at intervals in the circumferential direction of the fixed seat, a bendable feeler gauge piece is connected to the mounting surface, the feeler gauge piece includes a fixed piece with one end connected to the mounting surface and an adjusting piece connected to the fixed piece, and the adjusting piece is of a wedge-shaped structure and is tapered from the end close to the fixed piece to the end far from the fixed piece.

[0007] The stator is placed on the rotor through the fixing seat, and the adjusting piece is located between the rotor and the stator. Since the adjusting piece is in a wedge shape, when the thickness of the contact part between the adjusting piece and the stator and the rotor is greater than the air gap, under the simultaneous extrusion of the stator and the rotor, the adjusting piece automatically slides upward until the thickness of the adjusting piece meets the air gap requirement. Since the feeler gauge pieces are arranged around between the stator and the rotor, the adjusting device of the present utility model can effectively ensure the uniformity of the air gap between the stator and the rotor. At the same time, the adjusting piece is in a wedge shape and has different thicknesses at different parts, which can meet the air gap adjustment of motors of different models of compressors and improve the adaptability of the adjusting device.

[0008] Further, the fixing piece and the adjusting piece are connected by a bending groove, and the bending groove is located below the outer edge of the bottom end of the fixing seat. By the bending groove being located below the outer edge of the bottom end of the fixing seat, it is avoided that the adjusting piece is blocked by the fixing seat and cannot rotate when bending towards the fixing seat side.

[0009] Further, the thickness of one end of the adjusting piece close to the fixing piece is 0.8 mm to 1.2 mm, the thickness of the other end of the adjusting piece is 0.12 mm to 0.18 mm, and the length of the adjusting piece is 55 mm to 65 mm. By setting these dimensions, the air gap adjustment requirements of different models of compressors can be met.

[0010] Further, the fixing seat is provided with an installation groove adapted to the fixing piece, and the installation surface is located in the installation groove. Through the installation groove, the fixing piece can be further limited in position to prevent the fixing piece from shifting when the stator slides down.

[0011] Further, there is an included angle α between the installation surface and the vertical direction of the fixing seat, and the included angle α is 10° to 20°. By setting the included angle, the feeler gauge pieces are arranged obliquely on the fixing seat, slowing down the speed when the stator slides down along the feeler gauge pieces.

[0012] Further, the lower end of the fixing seat is provided with an installation part, the end face of the installation part is lower than the outer edge of the bottom end of the fixing seat, and the installation part is provided with a positioning hole. The fixing seat and the rotor are installed through the installation hole, realizing the coaxial positioning of the stator and the rotor.

[0013] Further, a handle is provided on the fixing seat. Through the handle, it is convenient to place the adjusting device of the present utility model.

[0014] Further, a plurality of bolt holes are provided on the fixing piece, and the bolt holes are within the range of the installation surface. The fixing piece and the installation surface are bolted through the bolt holes.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. The stator is placed on the rotor through the fixed seat and installed, and the shim is located between the rotor and the stator. Since the shim is of a wedge-shaped structure, when the thickness of the contact part of the shim with the stator and the rotor is greater than the air gap, under the simultaneous extrusion of the stator and the rotor, the shim automatically slides upward until the thickness of the contact part of the shim with the stator and the rotor meets the air gap requirement. At the same time, since the feeler gauge pieces are evenly arranged around between the stator and the rotor, the air gap between the stator and the rotor can be effectively ensured to be uniform through the adjusting device of the present utility model.

[0017] 2. Since the shim is of a wedge-shaped structure and the thickness of different parts is different, it can meet the requirements for adjusting the air gap of the motors of different models of compressors, improving the adaptability of the adjusting device.

[0018] 3. The fixed seat is positioned through the positioning holes, realizing the coaxial installation of the rotor and the stator when installing the stator. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an automatic air gap adjusting device for the motor of a refrigeration compressor according to the present utility model;

[0020] Figure 2 It is a schematic structural diagram of an automatic air gap adjusting device for the motor of a refrigeration compressor according to the present utility model (in the bent state);

[0021] Figure 3 It is a cross-sectional structural view of an automatic air gap adjusting device for the motor of a refrigeration compressor according to the present utility model (in the bent state);

[0022] Figure 4 It is a cross-sectional structural view of the feeler gauge piece of an automatic air gap adjusting device for the motor of a refrigeration compressor according to the present utility model;

[0023] Figure 5 It is a cross-sectional structural view of an automatic air gap adjusting device for the motor of a refrigeration compressor according to the present utility model (in the working state).

[0024] In the figure: 1, fixed seat; 2, feeler gauge piece; 201, fixed piece; 202, shim; 3, installation groove; 301, installation surface; 4, installation part; 5, positioning hole; 6, crankshaft; 7, handle; 8, rotor; 9, stator; 10, bending groove; 11, bolt hole; 12, convex block. Detailed Embodiments

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative work fall within the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] The following will be combined with Figures 1 to 5 , through specific embodiments and their application scenarios, a motor air gap automatic adjustment device for a refrigeration compressor provided by the embodiments of the present utility model will be described in detail.

[0029] As Figure 1 and Figure 3 shown, a motor air gap automatic adjustment device for a refrigeration compressor includes a fixed seat 1, and a plurality of mounting surfaces 301 are arranged at intervals in the circumferential direction of the fixed seat 1. Optionally, the number of the mounting surfaces 301 is 8, and the 8 mounting surfaces 301 are evenly arranged around the circumference of the fixed seat 1. The included angle between the mounting surface 301 and the vertical direction of the fixed seat 1 is α, where the included angle α is 10° to 20°, and preferably, α is 15°. It can be understood that the feeler gauge blade 2 is fixedly connected to the mounting surface 301, so that the feeler gauge blade 2 has an included angle with the vertical direction. When the stator 9 slides down along the feeler gauge blade 2, the feeler gauge blade 2 can slow down the sliding speed of the stator 9 and avoid the stator 9 colliding with the pump body of the compressor due to too fast a sliding speed.

[0030] As Figure 1As shown, a feeler gauge blade 2 is fixedly connected to the mounting surface 301. The feeler gauge blade 2 includes a fixed blade 201 and an adjusting blade 202, and the fixed blade 201 and the adjusting blade 202 are connected by a bending groove 10 in a transitional manner. The bending groove 10 is located below the outer edge of the bottom end of the fixed seat 1 to prevent the adjusting blade 202 from being blocked by the fixed seat 1 when the adjusting blade 202 rotates around the bending groove 10 towards the side close to the fixed seat 1. In addition, two bolt holes 11 are provided at one end of the fixed blade 201, and the bolt holes 11 are within the range of the mounting surface 301. The fixed blade 201 is fixed to the mounting surface 301 by two bolts.

[0031] Among them, the mounting surface 301 is located in the mounting groove 3, and the shape of the mounting groove 3 is adapted to the fixed blade 201. The fixed blade 201 is placed in the mounting groove 3, and the mounting groove 3 can further limit the rotation of the fixed blade 201.

[0032] Furthermore, the adjusting blade 202 is of a wedge-shaped structure, and is tapered from the end close to the fixed blade 201 to the end far from the fixed blade 201. The wedge surface is on the side of the adjusting blade 202 close to the fixed seat 1. The thickness of the end of the adjusting blade 202 close to the fixed blade 201 is 0.8 mm to 1.2 mm, preferably 1 mm. The thickness of the end of the adjusting blade 202 at the fixed blade 201 is 0.12 mm to 0.18 mm, preferably 0.15 mm. The length of the adjusting blade 202 is 55 mm to 65 mm, preferably 60 mm. The adjusting blade 202 has the same width as the fixed blade 201. In addition, the feeler gauge blade 2 is made of stainless steel material with a roughness of Ra0.2, ensuring the anti-corrosion and smooth surface of the feeler gauge blade 2.

[0033] As Figure 1 shown, a handle 7 is also fixedly connected above the fixed seat 1, and the adjusting device of the present invention can be conveniently installed through the handle 7. An installation part 4 is provided at the lower end of the fixed seat 1, and the end face of the installation part 4 is lower than the outer edge of the bottom of the fixed seat 1. Combining Figure 3 and Figure 5 shown, the installation part 4 protrudes from the bottom surface of the fixed seat 1, and the end face of the installation part 4 is lower than the outer edge of the bottom end of the fixed seat 1. A positioning hole 5 is also provided on the installation part 4, and the positioning hole 5 penetrates the fixed seat 1 to facilitate the crankshaft 6 to extend into the fixed seat 1 during installation. The diameter of the positioning hole 5 is adapted to the convex block 12 on the end face of the rotor 8, so that the fixed seat 1 can be placed on the rotor 8 through the convex block 12. Since the convex block 12 is located at the axis center of the rotor 8, after the fixed seat 1 is placed on the rotor 8, the stator 9 can be guaranteed to be coaxially installed with the rotor 8 when the stator 9 is placed through the fixed seat 1.

[0034] When using the utility model to adjust the air gap of the compressor motor, first place the adjusting device on the rotor 8 by using the handle 7, so that the positioning hole 5 is clamped with the convex block 12. Then pass the inner ring of the stator 9 through the fixing seat 1 and make the stator 9 slide down automatically along the feeler gauge piece 2. When the stator 9 slides down, it contacts the adjusting piece 202 and makes the adjusting piece 202 rotate, and makes the adjusting piece 202 located between the stator 9 and the rotor 8. Since the adjusting piece 202 is of a wedge-shaped structure, during the process of the stator 9 sliding down, when the thickness of the adjusting piece 202 is greater than the air gap between the stator 9 and the rotor 8, both the stator 9 and the rotor 8 squeeze the adjusting piece 202. Under the squeezing action on both sides, the adjusting piece 202 slides up automatically until the thickness of the contact part between the adjusting piece 202 and the stator 9 and the rotor 8 meets the air gap requirement. Since the feeler gauge pieces 2 are evenly arranged around between the stator 9 and the rotor 8, the air gap between the stator 9 and the rotor 8 is kept uniform.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic air gap adjusting device for a refrigeration compressor, characterized in that, It includes a fixed seat (1), and a number of mounting surfaces (301) are circumferentially arranged on the fixed seat (1). A bendable feeler gauge blade (2) is connected to the mounting surface (301). The feeler gauge blade (2) includes a fixed piece (201) with one end connected to the mounting surface (301), and an adjusting piece (202) connected to the fixed piece (201). The adjusting piece (202) is of a wedge-shaped structure and is tapered from the end close to the fixed piece (201) to the end far from the fixed piece (201).

2. The automatic air gap adjusting device for a refrigeration compressor according to claim 1, characterized in that, The fixed piece (201) and the adjusting piece (202) are transitionally connected through a bending groove (10), and the bending groove (10) is located below the outer edge of the bottom end of the fixed seat (1).

3. An automatic air gap adjusting device for a motor of a refrigeration compressor according to claim 1, characterized in that, The thickness of the end of the adjusting piece (202) close to the fixed piece (201) is 0.8 mm to 1.2 mm, the thickness of the other end of the adjusting piece (202) is 0.12 mm to 0.18 mm, and the length of the adjusting piece (202) is 55 mm to 65 mm.

4. The automatic air gap adjusting device for a refrigeration compressor according to claim 1, characterized in that, An installation groove (3) adapted to the fixed piece (201) is provided on the fixed seat (1), and the mounting surface (301) is located in the installation groove (3).

5. An automatic air gap adjusting device for a motor of a refrigeration compressor according to claim 1, characterized in that, The mounting surface (301) has an included angle α with the vertical direction of the fixed seat (1), and the included angle α is 15° to 20°.

6. The automatic air-gap adjusting device for a motor of a refrigeration compressor according to claim 1, characterized in that, An installation portion (4) is provided at the lower end of the fixed seat (1). The end face of the installation portion (4) is lower than the outer edge of the bottom end of the fixed seat (1), and a positioning hole (5) is provided on the installation portion (4).

7. An automatic air gap adjusting device for a motor of a refrigeration compressor according to claim 1, characterized in that, A handle (7) is provided on the fixed seat (1).

8. An automatic air gap adjustment device for a motor of a refrigeration compressor according to claim 1, characterized in that, A number of bolt holes (11) are provided on the fixed piece (201), and the bolt holes (11) are within the range of the mounting surface (301).

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