Low-noise motor rotor and compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a low-noise motor rotor and a compressor, which comprises a plurality of rotor punching sheets, and a shaft hole for a rotating shaft to pass through is arranged in the middle of each rotor punching sheet. A circulation hole for gas circulation is formed in an area between the edge of the rotor punching sheet and the edge of the shaft hole; the plurality of rotor punching sheets are coaxially stacked, and the circulation holes in each rotor punching sheet are not aligned with the circulation holes in the other rotor punching sheets; according to the motor rotor provided by the utility model, the gas circulation efficiency can be improved, the motor rotor is in contact with the gas at a certain angle, the aerodynamic noise can be reduced, and the motor rotor is applied to the compressor, so that the noise of the compressor in an operation state is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a low-noise motor rotor and a compressor. Background Art

[0002] At present, most motor rotors on the market use permanent magnets instead of wire windings. This type of rotor is called a permanent magnet synchronous motor, which is generally divided into a surface permanent magnet motor and an internal permanent magnet motor. The rotor of the internal permanent magnet motor is provided with multiple magnet slots, and multiple magnets are inserted into the magnet slots one by one, so that the magnets can be protected by the magnet slots. There will be no problem of magnet falling off during high-speed operation, which can further generate reluctance torque and improve the motor operation efficiency.

[0003] However, since the rotor of the internal permanent magnet motor is one through which the gas flows under pressure, the efficiency is low, and the rotor directly hits the gas laterally when it rotates, resulting in a loud noise when the compressor is running. Utility Model Content

[0004] In response to the above-mentioned problems of low motor rotor efficiency and high noise during operation, the utility model provides a low-noise motor rotor and compressor, which can improve the gas circulation efficiency. The motor rotor and the gas are in contact at a certain angle, which can reduce aerodynamic noise and effectively improve the noise of the compressor in operation.

[0005] In order to solve the above technical problems, the specific solutions provided by the utility model are as follows:

[0006] A low-noise motor rotor comprises a plurality of rotor punchings, wherein a shaft hole for a rotating shaft to pass through is arranged at the middle of the rotor punching, and a flow hole for gas flow is arranged in the area between the edge of the rotor punching and the edge of the shaft hole;

[0007] A plurality of rotor punches are coaxially stacked, and the flow holes on each rotor punch are not aligned with the flow holes on other rotor punches.

[0008] In some embodiments, the angle between the center lines of the flow holes of two adjacent rotor punches is set to α, and α is less than or equal to 0.2 degrees. The number of rotor punches is determined in combination with conventional motor power, and then the rotation angle between the flow holes of two adjacent rotor punches is determined to improve the gas flow efficiency of the motor rotor and reduce aerodynamic noise.

[0009] In some embodiments, the number of the rotor punchings is n, and n is greater than or equal to 2;

[0010] Assume that the angle between the center line of the flow hole of the nth rotor punching sheet and the center line of the flow hole of the first rotor punching sheet is θ, wherein θ=(n-1)*α, and determine the rotation angle of each rotor punching sheet to improve the gas flow efficiency of the motor rotor and reduce the aerodynamic noise.

[0011] In some embodiments, the angle between the center line of the flow hole of the first rotor punching sheet and the center line of the flow hole of the last rotor punching sheet is less than 25 degrees, thereby ensuring the gas flow efficiency of the motor rotor and reducing aerodynamic noise.

[0012] In some embodiments, a magnet slot for installing a magnet is further provided in the area between the edge of the rotor punching and the edge of the shaft hole, and the magnet slot on each rotor punching is aligned with the magnet slots on other rotor punchings to ensure the installation of the magnet and to protect the magnet from falling off during high-speed operation.

[0013] In some embodiments, the area between the edge of the rotor punching and the edge of the shaft hole is also provided with mounting holes for installing bolts, and the mounting holes on each of the rotor punchings are aligned with the mounting holes on the other rotor punchings to achieve the installation effect of the motor rotor.

[0014] The present application also provides a compressor, comprising a motor rotor as described in any one of the above items, wherein the motor rotor contacts the gas at a certain angle, thereby reducing aerodynamic noise and effectively improving the noise of the compressor when in operation.

[0015] In some embodiments, it further includes a rotating shaft, a cylinder body, and a plurality of blades;

[0016] One end of the rotating shaft passes through the motor rotor, and the other end of the rotating shaft is formed with a ring along the circumferential direction. The cylinder body is sleeved outside the ring, and the ring is provided with a plurality of mounting grooves for mounting the blades. The blades move between the mounting grooves and the cylinder body.

[0017] In some embodiments, the rotating shaft and the circular ring are an integrally formed structure, and the rotating shaft is a non-eccentric shaft, so that the overall force of the rotating shaft is more balanced, the vibration of the compressor during operation is reduced, the efficiency is improved, and unnecessary losses are reduced.

[0018] In some embodiments, a plurality of the mounting grooves are spaced apart along the circumferential direction of the circular ring. When the shaft rotates, the blades fly out of the mounting grooves by inertia and then contact the cylinder body to form a sealing structure, dividing the inner circumference of the cylinder body into a plurality of spaces.

[0019] Compared with the prior art, the beneficial effect of the utility model is that the utility model provides a low-noise motor rotor and a compressor, in which the flow holes on a plurality of rotor punchings are stacked and placed in a manner of rotating one by one and keeping them connected, which can improve the gas flow efficiency, and the motor rotor is in contact with the gas at a certain angle, which can reduce aerodynamic noise and effectively improve the noise of the compressor in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a low-noise motor rotor provided in an embodiment of the utility model;

[0021] Figure 2 A top view of a low-noise motor rotor provided in an embodiment of the utility model;

[0022] Figure 3 for Figure 2 A magnified view of the flow hole in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of the compressor provided in an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the rotating shaft and the circular ring provided in the embodiment of the utility model;

[0025] 1-Rotor punching;

[0026] 2- shaft hole;

[0027] 3-Flow holes;

[0028] 4- Magnet slot;

[0029] 5-Mounting holes;

[0030] 6- rotating shaft;

[0031] 7-cylinder body;

[0032] 8-leaf;

[0033] 9-ring;

[0034] 10-Mounting slot. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0037] For example, a low-noise motor rotor includes a plurality of rotor punchings, wherein an axial hole for a rotating shaft to pass through is provided in the middle of the rotor punching, and a flow hole for gas circulation is provided in the area between the edge of the rotor punching and the edge of the axial hole; the plurality of rotor punchings are coaxially stacked, and the flow holes on each rotor punching are not aligned with the flow holes on other rotor punchings.

[0038] A low-noise motor rotor and compressor provided in this embodiment stack the flow holes on several rotor punchings in a manner of rotating them one by one and keeping them connected, which can improve the gas flow efficiency. The motor rotor and the gas are in contact at a certain angle, which can reduce aerodynamic noise and effectively improve the noise of the compressor when it is in operation.

[0039] Embodiment 1:

[0040] refer to Figure 1-Figure 3 This example provides a low-noise motor rotor, including a plurality of rotor punchings 1. The number of rotor punchings 1 can be determined according to the set motor power. For example, the greater the motor power, the more rotor punchings 1 are required, and the smaller the motor power, the relatively fewer rotor punchings 1 are required. In this example, there is no specific limitation on the number of rotor punchings 1.

[0041] An axial hole 2 for the rotating shaft 6 to pass through is provided in the middle position of the rotor punching 1. The axial hole 2 and the rotor punching 1 are coaxial. A flow hole 3 for gas circulation is provided in the area between the edge of the rotor punching 1 and the edge of the axial hole 2. The number of the flow holes 3 can be multiple, and the multiple flow holes 3 are distributed along the outer circumference of the axial hole 2.

[0042] For example, in this example, the number of the circulation holes 3 is 6, and the 6 circulation holes 3 are arranged in the area between the edge of the rotor punching 1 and the edge of the shaft hole 2, and the 6 circulation holes 3 are distributed along the outer circumference of the shaft hole 2. Of course, in this example, there is no specific limitation on the number of the circulation holes 3, which can be adjusted according to actual design requirements.

[0043] A number of rotor punchings 1 are coaxially stacked. As can be seen from the above content, the axial hole 2 set on the rotor punching 1 is coaxial with the rotor punching 1. Therefore, it can also be understood here that after the number of rotor punchings 1 are coaxially stacked, the axial holes 2 on each rotor punching 1 are aligned one by one. It should be noted that the flow holes 3 on each rotor punching 1 are not aligned with the flow holes 3 on other rotor punchings 1.

[0044] For ease of understanding, the number of rotor punchings is set here to be 3, which are sorted by the number of stacking times, including the first rotor punching, the second rotor punching and the third rotor punching. During the stacking process, the first rotor punching is used as a reference, and the second rotor punching is coaxially stacked with the first rotor punching, that is, the axial hole 2 on the second rotor punching is aligned with the axial hole 2 on the first rotor punching. Similarly, the third rotor punching is placed on the second rotor punching, and the axial hole 2 on the third rotor punching is aligned with the axial hole 2 on the second rotor punching. It should be noted that in order to improve the lifting circulation efficiency and reduce aerodynamic noise, when stacking the three rotor punches, in addition to considering the alignment of the shaft holes 2 on each rotor punch, the other rotor punches except the first rotor punch are rotated at a certain angle. For example, the second rotor punch is rotated at a certain angle with the center of its shaft hole 2 as the rotation point, and is placed on the first rotor punch, so that the shaft hole 2 on the second rotor punch is aligned with the shaft hole 2 on the first rotor punch, and the flow hole 3 on the second rotor punch is not aligned with the flow hole 3 on the first rotor punch, but there is still a connection between the flow holes 3 to achieve the gas circulation effect. For the stacking of the third rotor punch, it can be understood by referring to the second rotor punch, so that the shaft hole 2 on the third rotor punch is aligned with the shaft hole 2 on the second rotor punch, and the flow hole 3 on the third rotor punch is not aligned with the flow hole 3 on the second rotor punch, but there is a connection between the flow holes 3.

[0045] It should be noted that, regarding the non-aligned flow holes 3 on each rotor punching 1, when there are multiple flow holes 3 set on the rotor punching 1, the layout path and layout area of ​​the flow holes 3 on each rotor punching 1 are the same, so that there is a one-to-one correspondence between the flow holes 3 on two adjacent rotor punchings 1, but the correspondence presents a non-aligned relationship in the stacked state.

[0046] A low-noise motor rotor and compressor are provided in this example, in which the flow holes 3 on several rotor punchings 1 are stacked and placed in a manner of rotating one by one while maintaining connectivity, which can improve the gas flow efficiency. The motor rotor and the gas are in contact at a certain angle, which can reduce aerodynamic noise and effectively improve the noise of the compressor when it is in operation.

[0047] Embodiment 2:

[0048] In this example, the angle between the center lines of the flow holes 3 of two adjacent rotor punchings 1 is assumed to be α. It can be understood that the flow hole 3 can be a waist-shaped hole, and the center line of the flow hole 3 extends from the edge of the axial hole 2 to the edge of the rotor punching 1. When stacking, the next rotor punching 1 is rotated relative to the previous rotor punching 1, that is, the rotation angle is the angle α between the center lines of the flow holes 3 of two adjacent rotor punchings 1, wherein α is less than or equal to 0.2 degrees. The number of rotor punchings 1 is determined in combination with the conventional motor power, and then the rotation angle between the flow holes 3 of two adjacent rotor punchings 1 is determined, and the connectivity of the flow holes 3 between the rotor punchings 1 after stacking is ensured, so as to improve the gas flow efficiency of the motor rotor and reduce aerodynamic noise.

[0049] In some examples, the number of rotor punchings 1 is n, where n is greater than or equal to 2; the angle between the center line of the flow hole 3 of the nth rotor punching 1 and the center line of the flow hole 3 of the first rotor punching 1 is θ, where θ=(n-1)*α, and the rotation angle of each rotor punching 1 is determined to improve the gas flow efficiency of the motor rotor and reduce the aerodynamic noise.

[0050] For ease of understanding, the number of rotor punchings is set to 2, that is, including the first rotor punching and the second rotor punching, and the angle α is set to 0.1 degree. According to the formula θ=(n-1)*α, it can be known that the angle between the center line of the flow hole 3 of the second rotor punching and the center line of the flow hole 3 of the first rotor punching is 0.1 degree, that is, the second rotor punching is rotated 0.1 degree and then stacked on the first rotor punching; for another example, the number of rotor punchings is set to 3, including the third rotor punching. According to the formula θ=(n-1)*α, it can be known that the angle between the center line of the flow hole 3 of the third rotor punching and the center line of the flow hole 3 of the first rotor punching is 0.2 degree. At the same time, it can also be known that the angle between the center line of the flow hole 3 of the third rotor punching and the center line of the flow hole 3 of the second rotor punching is α, and α is 0.1 degree.

[0051] In this example, by setting the rotation angle between two adjacent rotor punchings, the motor rotor contacts the gas at a certain angle after stacking, which can reduce aerodynamic noise and effectively improve the noise of the compressor in operation.

[0052] Embodiment three:

[0053] In this example, the angle between the center line of the flow hole 3 of the first rotor punching sheet 1 and the center line of the flow hole 3 of the last rotor punching sheet 1 is less than 25 degrees, which ensures the gas flow efficiency of the motor rotor and reduces the aerodynamic noise.

[0054] The number of rotor punchings 1 is determined by the set motor power. When the set motor power is higher, the number of rotor punchings 1 required is also larger. Therefore, in order to ensure the connectivity between the flow holes 3 on each rotor punching 1 after stacking, the angle between the center line of the flow hole 3 of the last rotor punching 1 and the center line of the flow hole 3 of the first rotor punching 1 is set to be less than 25 degrees, so as to ensure the gas flow efficiency of the motor rotor and reduce the aerodynamic noise.

[0055] In some examples, a magnet slot 4 for installing a magnet is further provided in the area between the edge of the rotor punching 1 and the edge of the shaft hole 2. The magnet slot 4 on each rotor punching 1 is aligned with the magnet slots 4 on other rotor punchings 1 to ensure the installation of the magnet and to protect the magnet from falling off during high-speed operation.

[0056] For example, the number of magnet slots 4 is 6, and the 6 magnet slots 4 are distributed around the circumference of the shaft hole 2. A magnet can be installed in each magnet slot 4 to prevent the magnet from falling off.

[0057] The area between the edge of the rotor punching 1 and the edge of the shaft hole 2 is also provided with mounting holes 5 for mounting bolts. The mounting holes 5 on each rotor punching 1 are aligned with the mounting holes 5 on other rotor punchings 1 to achieve the installation effect of the motor rotor.

[0058] Embodiment 4:

[0059] refer to Figure 4 and Figure 5 The present application also provides a compressor, including the motor rotor in the above embodiment, the motor rotor is formed by coaxially stacking a number of rotor punchings 1, and the flow holes 3 on each rotor punching 1 are in a non-aligned relationship, so that the motor rotor contacts the gas at a certain angle, which plays a role in reducing aerodynamic noise. When applied to a compressor, it can effectively improve the noise of the compressor in operation.

[0060] In some examples, the compressor also includes a rotating shaft 6, a cylinder body 7 and a plurality of blades 8; one end of the rotating shaft 6 passes through the motor rotor, and a circular ring 9 is formed along the circumferential direction on the other end of the rotating shaft 6; the cylinder body 7 is sleeved on the outside of the circular ring 9, and a plurality of mounting grooves 10 for mounting the blades 8 are opened on the circular ring 9, and the blades 8 move between the mounting grooves 10 and the cylinder body 7.

[0061] Specifically, the rotating shaft 6 and the circular ring 9 are an integrally formed structure, and the rotating shaft 6 is a non-eccentric shaft, so that the overall force of the rotating shaft 6 is more balanced, the vibration of the compressor during operation is reduced, the efficiency is improved, and unnecessary losses are reduced.

[0062] The existing crankshaft is eccentric, and vibrates greatly when working, which reduces the working efficiency of the compressor. In this example, the rotating shaft 6 and the ring 9 are designed to be an integrally formed structure, and the rotating shaft 6 is a non-eccentric shaft. By removing the eccentricity of the rotating shaft 6, the overall force of the rotating shaft 6 is made more balanced, and the structure of the ring 9 with the mounting groove 10 is used to replace the eccentricity. During the rotation of the rotating shaft 6, the blade 8 uses inertia to fly out of the mounting groove 10 and contact the cylinder body 7 to form a sealing structure. The blade 8 telescopes along the shape of the inner circumference of the cylinder body 7, and divides the inner circumference of the cylinder body 7 into multiple spaces.

[0063] Among them, the number of mounting grooves 10 is 8, and the 8 mounting grooves 10 are spaced apart along the circumferential direction of the ring 9. The blades 8 are installed one by one in the mounting grooves 10. When the rotating shaft 6 rotates, the blades 8 fly out of the mounting grooves 10 by inertia and then contact the cylinder body 7 to form a sealing structure, dividing the inner circumference of the cylinder body 7 into multiple spaces.

[0064] In summary, the utility model provides a low-noise motor rotor and compressor, in which the flow holes on a number of rotor punchings are stacked and placed in a manner of rotating one by one and keeping them connected, which can improve the gas flow efficiency, and the motor rotor and the gas are in contact at a certain angle, which can reduce aerodynamic noise and effectively improve the noise of the compressor in operation.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0067] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

Claims

1. A low noise motor rotor, characterized in that: It comprises a plurality of rotor punchings (1), wherein a shaft hole (2) for a rotating shaft to pass through is arranged at the middle of each rotor punching (1), and a flow hole (3) for gas flow is arranged in the area between the edge of each rotor punching (1) and the edge of each shaft hole (2); A plurality of rotor punching sheets (1) are coaxially stacked, and the flow holes (3) on each rotor punching sheet (1) are not aligned with the flow holes (3) on other rotor punching sheets (1).

2. The low noise motor rotor according to claim 1, characterized in that: Assume that the angle between the center lines of the flow holes (3) of two adjacent rotor punching sheets (1) is α, and α is less than or equal to 0.2 degrees.

3. The low noise motor rotor according to claim 2, characterized in that: Assuming that the number of the rotor punching sheets (1) is n, and n is greater than or equal to 2; Assume that the included angle between the center line of the flow hole (3) of the nth rotor punching sheet (1) and the center line of the flow hole (3) of the first rotor punching sheet (1) is θ, wherein θ=(n-1)*α.

4. The low noise motor rotor according to claim 1, characterized in that: The angle between the center line of the flow hole (3) of the first rotor punching sheet (1) and the center line of the flow hole (3) of the last rotor punching sheet (1) is less than 25 degrees.

5. The low noise motor rotor according to claim 1, characterized in that: A magnet slot (4) for mounting a magnet is also provided in the area between the edge of the rotor punching sheet (1) and the edge of the shaft hole (2), and the magnet slot (4) on each rotor punching sheet (1) is aligned with the magnet slots (4) on other rotor punching sheets (1).

6. The low noise motor rotor according to claim 1, characterized in that: A mounting hole (5) for mounting bolts is also provided in the area between the edge of the rotor punching sheet (1) and the edge of the shaft hole (2), and the mounting hole (5) on each rotor punching sheet (1) is aligned with the mounting holes (5) on other rotor punching sheets (1).

7. A compressor, characterized in that: A motor rotor comprising the motor rotor according to any one of claims 1 to 6.

8. The compressor according to claim 7, characterized in that It also includes a rotating shaft (6), a cylinder body (7) and a plurality of blades (8); One end of the rotating shaft (6) passes through the motor rotor, and the other end of the rotating shaft (6) is formed with a ring (9) along the circumferential direction. The cylinder body (7) is sleeved outside the ring (9), and the ring (9) is provided with a plurality of mounting grooves (10) for mounting the blades (8). The blades (8) move between the mounting grooves (10) and the cylinder body (7).

9. The compressor according to claim 8, characterized in that The rotating shaft (6) and the circular ring (9) are an integrally formed structure, and the rotating shaft (6) is a non-eccentric shaft.

10. The compressor according to claim 8, characterized in that A plurality of the mounting grooves (10) are distributed at intervals along the circumferential direction of the circular ring (9).

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