Rotor balance block, motor with rotor balance block and compressor with rotor balance block

Abstract

The utility model relates to a rotor balance block and a motor and a compressor with the same, the rotor balance block comprises an arc-shaped balance body, one side surface of the balance body is a step-shaped windward side, and the other side surface of the balance body is a step-shaped leeward side; the inner diameter face of the balance body is an inclined face, the inner diameter face of the balance body inclines in the direction away from the outer diameter face of the balance body from top to bottom, and the included angle alpha between the inner diameter face and the lower end face of the balance body is larger than 10 degrees and smaller than 90 degrees. According to the rotor balance block, the inner diameter surface adopts the inclined design, vertically upward fluid at the inner diameter can be reduced, the oil spitting direction is improved so as to reduce the oil spitting amount, and the windward surface and the leeward surface both adopt the inclined design, so that wind resistance and fluid noise can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor balancing, in particular to a rotor balancing block and a motor and a compressor having the same. Background Art

[0002] A compressor typically consists of an upper cover, a lower cover, a housing, a motor fixed within the housing to provide rotational power, and a pump body to compress the refrigerant. During operation, the eccentric rotation of the rotor generates unbalanced forces and torque, which intensify compressor vibration and produce wasted work. Therefore, to mitigate the adverse effects of these unbalanced forces, balancing weights are typically added to the upper and lower ends of the rotor to reduce these unbalanced forces.

[0003] However, conventional balancing blocks are designed with their side faces and end faces perpendicular to each other, so when the motor rotor rotates at high speed, high-pressure refrigerant fluid acts on the side faces of the balancing block, affecting the balance and increasing the resistance. Utility Model Content

[0004] Based on this, the purpose of the present invention is to overcome the shortcomings of the existing technology and provide a rotor balancing block, the inner diameter surface of which adopts an inclined design, which can reduce the vertical upward fluid at the inner diameter, improve the oil discharge direction to reduce the oil discharge volume, and its windward and leeward surfaces both adopt an inclined design to reduce wind resistance and fluid noise.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted in the first aspect of the embodiment of the present utility model is:

[0006] A rotor balancing weight includes an arc-shaped balancing body, one side of the balancing body is a stepped windward side, and the other side of the balancing body is a stepped leeward side; the inner diameter surface of the balancing body is an inclined surface, and the inner diameter surface of the balancing body is inclined from top to bottom in a direction away from the outer diameter surface of the balancing body, and the angle α between the inner diameter surface and the lower end surface of the balancing body is in the range of 10°<α<90°.

[0007] Therefore, according to the rotor balancing block of the embodiment of the present invention, by designing one side surface of the balancing body as a stepped windward surface, the wind resistance of the balancing body can be effectively reduced by utilizing an inclined design, and the other side surface of the planar body is also designed as a stepped leeward surface, and the eddy current loss can be effectively reduced by utilizing an inclined design to reduce fluid noise; further, by designing the inner diameter surface to be inclined, the fluid surrounded by the inner diameter of the balancing body can flow along the inclined direction toward the side wall of the compressor casing to reduce the vertical upward fluid in the rotor structure, which can not only reduce the influence of the centrifugal force of the fluid on the balancing body, but also improve the oil discharge condition of the rotor structure.

[0008] As an embodiment, the included angle α between the inner diameter surface and the lower end surface of the balancing body is in the range of 30°<α<85°.

[0009] As an embodiment, the windward surface and the leeward surface are symmetrically arranged about the vertical plane where the symmetry center line is located, and the windward surface includes a first windward slope surface and a second windward slope surface arranged at intervals above and below, and the first windward slope surface and the second windward slope surface are connected by a stepped plane.

[0010] As an embodiment, the angle formed by the first windward slope and the stepped plane is β, β<α.

[0011] As an implementation manner, the angle formed by the second windward slope and the lower end surface of the balancing body is δ, and δ<α.

[0012] As an embodiment, the first windward slope and the second windward slope are both arc streamlined.

[0013] As an embodiment, the balancing body includes, from bottom to top, an integrally formed first step portion and a second step portion, and a height of the first step portion along the axial direction is H, where H>2 mm.

[0014] As an embodiment, the second step portion and the first step portion are arranged from top to bottom, the projected area of the second step portion in the axial direction is smaller than the projected area of the first step portion in the axial direction, and the contour line of the shape of the second step portion projected on the first step portion is isolated from the outer edge of the upper end face of the first step portion.

[0015] A second aspect of the present invention provides a motor comprising a rotor structure and the aforementioned rotor balancing weight, the rotor balancing weight being mounted on an end surface of the rotor structure. Thus, the motor according to the present invention improves the rotor balancing weight by adopting an inclined inner diameter surface, thereby reducing vertical upward flow at the inner diameter, improving the direction of oil discharge and reducing the amount of oil discharged. Both the windward and leeward surfaces are inclined, thereby reducing wind resistance and fluid noise.

[0016] A third aspect of the present invention provides a compressor comprising the motor described above. Thus, the compressor according to the present invention improves the rotor balance weight, adopting an inclined inner diameter surface to reduce vertical upward flow at the inner diameter, improve the oil discharge direction, and reduce the oil discharge volume. Both the windward and leeward surfaces are inclined to reduce wind resistance and fluid noise.

[0017] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the structural schematic diagrams of the rotor balancing weight according to an embodiment of the present utility model;

[0019] Figure 2 This is the second structural diagram of the rotor balancing weight according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 One of the schematic diagrams after the AA section shown;

[0021] Figure 4 for Figure 2 The second schematic diagram after the AA section is shown;

[0022] Figure 5 This is the third structural diagram of the rotor balancing weight according to an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 100. Balancing body; 110. First step; 120. Second step; 130. Inner diameter surface; 140. Windward surface; 141. First windward slope; 142. Second windward slope; 150. Leeward surface; 160. Upper end surface; 170. Lower end surface. DETAILED DESCRIPTION

[0025] To further illustrate various embodiments, this utility model is provided with accompanying drawings. These drawings form part of the disclosure of this utility model and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will be able to understand other possible implementations and the advantages of this utility model.

[0026] In the related art, the compressor is generally composed of an upper cover, a lower cover, a shell, a motor fixed inside to provide rotational power, and a pump body for realizing refrigerant compression. Among them, during the operation of the motor, the unbalanced force and torque generated by the eccentric rotation of the rotor cause the vibration of the compressor to intensify and generate useless work. Therefore, in order to reduce the adverse effects of the unbalanced force, balancing blocks are usually added to the upper and lower end faces of the rotor to play a role in reducing the unbalanced force. However, the conventional balancing block adopts a design in which the side and end faces are perpendicular to each other, so that when the motor rotor rotates at high speed, the high-pressure refrigerant fluid acts on the side of the balancing block, affecting the balance and increasing the resistance.

[0027] In view of this, an embodiment of the present invention provides a rotor balancing block, whose inner diameter surface 130 adopts an inclined design, which can reduce the vertical upward fluid at the inner diameter, improve the oil discharge direction to reduce the oil discharge volume, and its windward surface 140 and leeward surface 150 both adopt an inclined design to reduce wind resistance and fluid noise.

[0028] See also Figures 1 to 4 An embodiment of the present invention provides a rotor balancing weight, including an arc-shaped balancing body 100, one side of the balancing body 100 is a stepped windward surface 140, and the other side of the balancing body 100 is a stepped leeward surface 150; the inner diameter surface 130 of the balancing body 100 is an inclined surface, and the inner diameter surface 130 of the balancing body 100 is inclined from top to bottom in a direction away from the outer diameter surface of the balancing body 100, and the angle α between the inner diameter surface 130 and the lower end surface of the balancing body 100 is in the range of 10°<α<90°.

[0029] Therefore, according to the rotor balancing block of the embodiment of the present invention, by designing one side surface of the balancing body 100 as a stepped windward surface 140, the wind resistance of the balancing body 100 can be effectively reduced by utilizing an inclined design, and the other side surface of the planar body is also designed as a stepped leeward surface 150, and the eddy current loss can be effectively reduced by utilizing an inclined design to reduce fluid noise; further, by designing the inner diameter surface 130 to be inclined, the fluid surrounded by the inner diameter of the balancing body 100 can flow along the inclined direction toward the side wall of the compressor casing to reduce the vertical upward fluid in the rotor structure, which can not only reduce the influence of the centrifugal force of the fluid on the balancing body 100, but also improve the oil discharge condition of the rotor structure.

[0030] Specifically, the included angle α between the inner diameter surface 130 and the lower end surface of the balancing body 100 is in the range of 30° < α < 85°. Thus, according to the rotor balancing weight of the embodiment of the present invention, by setting the included angle α between the inner diameter surface 130 and the lower end surface of the balancing body 100 to be in the range of 30° < α < 85°, the fluid enclosed by the inner diameter of the balancing body 100 can flow in an inclined direction toward the sidewall of the compressor housing, thereby reducing the vertical upward flow in the rotor structure. This can not only reduce the impact of the fluid centrifugal force on the balancing body 100, but also improve the oil discharge of the rotor structure.

[0031] In addition, the inner diameter surface 130 is in an arc streamline shape, and the connections between the inner diameter surface 130 and the windward surface 140 and the leeward surface 150 are all arranged in an arc transition surface structure.

[0032] It can be understood that the balancing body 100 is an arc-shaped structure, wherein the lower end face and the upper end face 160 are two end faces along the axial direction, the inner diameter surface 130 is the inner wall surface with the smallest radius along the radial direction, and the outer diameter surface is the outer wall surface with the largest radius along the radial direction; and the windward surface 140 and the leeward surface 150 are the two side faces of the balancing body 100 connecting the inner diameter surface 130 and the outer diameter surface.

[0033] According to some embodiments of the present invention, the balancing body 100 includes, from bottom to top, an integrally formed first step 110 and a second step 120. It can be understood that the second step 120 is a raised portion extending upward from the first step 110, the arc length of the second step 120 is less than the arc length of the first step 110, and the second step 120 and the first step 110 are symmetrically arranged about the vertical plane of the symmetry centerline, so that the windward side 140 and the leeward side 150 are symmetrically arranged about the vertical plane of the symmetry centerline. This ensures that the impact force on the two side surfaces of the balancing body 100 is more uniform, preventing the problem of excessive or insufficient impact force on any part. The axial height of the first step 110 is H, where H is greater than 2 mm.

[0034] The windward surface 140 includes a first windward slope 141 and a second windward slope 142 spaced apart from each other, with the first windward slope 141 and the second windward slope 142 connected by a stepped plane. Similarly, the leeward surface 150 includes a first leeward slope and a second leeward slope spaced apart from each other, with the first leeward slope and the second leeward slope connected by a stepped plane.

[0035] It can be understood that according to the rotor balance weight of the embodiment of the present invention, the shapes of the windward surface 140 and the leeward surface 150 can adopt a curved arc streamlined design, or a flat inclined surface design. Those skilled in the art can make several changes based on the embodiment of the present invention, such as designing the first windward slope 141 and the second windward slope 142 as arc streamlined, and designing the first leeward slope and the second leeward slope as flat inclined surfaces; or designing the first windward slope 141 and the first leeward slope as arc streamlined, and designing the second windward slope 142 and the second leeward slope as flat inclined surfaces; or other combination designs.

[0036] According to some embodiments of the present invention, the angle formed between the first windward slope 141 and the stepped plane is β, β<α. In addition, the angle formed between the second windward slope 142 and the lower end surface of the balancing body 100 is δ, δ<α.

[0037] like Figure 5As shown, in some embodiments of the present invention, the second step portion 120 and the first step portion 110 are arranged from top to bottom, the projected area of the second step portion 120 in the axial direction is smaller than the projected area of the first step portion 110 in the axial direction, and the contour line of the shape of the second step portion 120 projected on the upper end surface of the first step portion 110 is separated from the outer edge of the upper end surface of the first step portion 110. It can be understood that in these embodiments, the inner and outer peripheries of the second step portion 120 do not overlap with the inner and outer peripheries of the first step portion 110 in the axial direction, and any cross-section of the second step portion 120 in the radial direction is surrounded and separated by the upper end surface of the first step portion 110.

[0038] Reference below Figures 1 to 4 A rotor balancing weight according to a specific embodiment of the present invention is described in detail. It is worth noting that the following description is merely illustrative and should not be construed as limiting the present invention.

[0039] like Figures 1 to 4 As shown, the rotor balancing weight of the embodiment of the present invention includes an arc-shaped balancing body 100, one side of the balancing body 100 is a stepped windward surface 140, and the other side of the balancing body 100 is a stepped leeward surface 150; the inner diameter surface 130 of the balancing body 100 is an inclined surface, and the inner diameter surface 130 of the balancing body 100 is inclined from top to bottom in a direction away from the outer diameter surface of the balancing body 100, and the angle α between the inner diameter surface 130 and the lower end surface of the balancing body 100 is 75°.

[0040] The balancing body 100 comprises, from bottom to top, an integrally formed first step 110 and a second step 120. The axial height H of the first step 110 is 3 mm. The windward surface 140 comprises a first windward slope 141 and a second windward slope 142, while the leeward surface 150 comprises a first leeward slope and a second leeward slope. The first step 110 and the second step 120 are symmetrically arranged about a vertical plane along a central line of symmetry. The windward surface 140 and the leeward surface 150 are also symmetrically arranged about a vertical plane along a central line of symmetry. The angle β formed between the first windward slope 141 and the step plane is 60°, while the angle δ formed between the second windward slope 142 and the lower end face of the balancing body 100 is 56°.

[0041] In addition, the inner diameter surface 130 is in an arc streamline shape, and the connections between the inner diameter surface 130 and the windward surface 140 and the leeward surface 150 are all arranged in an arc transition surface structure.

[0042] A second aspect of an embodiment of the present invention provides a motor comprising a rotor structure and the aforementioned rotor balancing weight, the rotor balancing weight being mounted on an end surface of the rotor structure. Thus, according to an embodiment of the present invention, the motor improves the rotor balancing weight by adopting an inclined design on its inner diameter surface 130, thereby reducing vertical upward flow at the inner diameter, improving the direction of oil discharge and reducing the amount of oil discharged. Both its windward surface 140 and leeward surface 150 are inclined, thereby reducing wind resistance and fluid noise.

[0043] A third aspect of the present invention provides a compressor comprising the above-described motor. Thus, the compressor according to the present invention improves the rotor balance weight, adopting an inclined design for its inner diameter surface 130 to reduce vertical upward flow at the inner diameter, improve the oil discharge direction, and reduce the oil discharge volume. Both the windward surface 140 and the leeward surface 150 adopt an inclined design to reduce wind resistance and fluid noise.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0045] The above embodiments represent only a few implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention's rotor balancing weights and the motors and compressors incorporating them. It should be noted that those skilled in the art will readily appreciate variations and improvements without departing from the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A rotor balancing weight, characterized in that: The invention comprises an arc-shaped balancing body, one side of the balancing body being a stepped windward side, and the other side of the balancing body being a stepped leeward side; the inner diameter surface of the balancing body being an inclined surface, and the inner diameter surface of the balancing body being inclined from top to bottom in a direction away from the outer diameter surface of the balancing body, and the angle α between the inner diameter surface and the lower end surface of the balancing body being in the range of 10°<α<90°.

2. The rotor balancing weight according to claim 1, characterized in that: The included angle α between the inner diameter surface and the lower end surface of the balancing body is in the range of 30°<α<85°.

3. The rotor balancing weight according to claim 2, characterized in that: The windward surface and the leeward surface are symmetrically arranged about the vertical plane where the symmetry center line is located. The windward surface includes a first windward slope surface and a second windward slope surface spaced apart from each other. The first windward slope surface and the second windward slope surface are connected by a stepped plane.

4. The rotor balancing weight according to claim 3, characterized in that: The angle formed by the first windward slope and the stepped plane is β, where β<α.

5. The rotor balancing weight according to claim 3, characterized in that: The included angle formed by the second windward slope and the lower end surface of the balancing body is δ, where δ<α.

6. The rotor balancing weight according to claim 3, characterized in that: The first windward slope and the second windward slope are both arc streamlined.

7. The rotor balancing weight according to claim 1, characterized in that: The balancing body includes, from bottom to top, an integrally formed first step portion and a second step portion, wherein the height of the first step portion along the axial direction is H, where H>2 mm.

8. The rotor balancing weight according to claim 7, characterized in that: The second step portion and the first step portion are arranged from top to bottom, the projected area of the second step portion in the axial direction is smaller than the projected area of the first step portion in the axial direction, and the contour line of the shape of the second step portion projected on the first step portion is isolated from the outer edge of the upper end surface of the first step portion.

9. A motor, characterized in that: The invention comprises a rotor structure and a rotor balancing weight according to any one of claims 1 to 8, wherein the rotor balancing weight is mounted on an end surface of the rotor structure.

10. A compressor, characterized in that: Comprising the motor as claimed in claim 9.

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