Rotor assembly for motor, motor and compressor

Abstract

The utility model relates to a rotor assembly for a motor, the motor and a compressor. The rotor assembly for the motor comprises a rotor main body, a balance block and an oil baffle plate, the rotor body is provided with an airflow channel. The balance block is arranged on the end face of the rotor body, and the end face, away from the rotor body, of the balance block is provided with a protruding part and step parts located on the two sides of the protruding part. And the oil baffle plate is arranged on the two step parts and the rotor main body and is provided with a drainage channel, and the drainage channel is communicated with the airflow channel. The rotor assembly used for the motor can promote sedimentation of refrigerating machine oil, improve discharge efficiency of air flow, and improve connection stability between the balance block and the oil baffle plate.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a rotor assembly for an electric motor, an electric motor, and a compressor. Background Technology

[0002] The main functions of refrigeration oil in a compressor are lubrication and sealing. However, during compressor operation, especially when a variable frequency compressor is running at high frequency, due to the large discharge flow, refrigeration oil is easily discharged out of the compressor along with the refrigerant through the discharge pipe. This can lead to insufficient oil inside the compressor, resulting in inadequate lubrication and affecting the reliability of compressor operation. At the same time, excessive refrigeration oil entering the air conditioning system reduces the heat exchange performance of the air conditioning system, leading to a decrease in the energy efficiency of the air conditioning system.

[0003] Currently, the rotor structure of a compressor generally consists of a rotor core, magnets, end plates, balance blocks, and oil baffles. The end plates are located on the end faces of the rotor core, the balance blocks are located on the end plates, and the oil baffles are located on the end faces of the balance blocks furthest from the rotor core. This changes the direction of the airflow discharged from the rotor core, causing the airflow to discharge radially and reducing the compressor's oil discharge. However, the fit between the oil baffles, balance blocks, and rotor core in this type of rotor structure is relatively poor, and the oil baffles are isolated from the rotor core, resulting in relatively low airflow discharge efficiency. Utility Model Content

[0004] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotor assembly for an electric motor, an electric motor and a compressor that can promote the settling of refrigeration oil, improve the airflow discharge efficiency and enhance the connection stability between the balance block and the oil baffle.

[0005] To achieve the above objectives, the first aspect of this utility model provides a rotor assembly for an electric motor, comprising a rotor body, a balance block, and an oil baffle; the rotor body has an airflow channel; the balance block is disposed on an end face of the rotor body, and the end face of the balance block away from the rotor body has a protrusion and stepped portions located on both sides of the protrusion; the oil baffle is disposed on the two stepped portions and the rotor body, and the oil baffle has a drainage channel, which is connected to the airflow channel.

[0006] Therefore, according to the rotor assembly for motor of this utility model, by setting a stepped portion on the balance block and connecting and fixing the oil baffle to the stepped portion of the balance block and the rotor body respectively, the connection between the balance block, the oil baffle, and the rotor body is greatly improved, effectively enhancing the connection stability between the balance block and the oil baffle. In addition, by setting a drainage channel on the oil baffle and connecting the drainage channel to the airflow channel of the rotor body, the oil baffle ensures that a large amount of refrigerant oil is blocked and settles, while not affecting the smooth passage of gaseous refrigerant. Furthermore, the drainage channel effectively improves the airflow discharge efficiency.

[0007] According to some embodiments of the present invention, the oil baffle has a central hole through which the crankshaft passes along the axial direction in the middle part, and the end face of the oil baffle near the rotor body has at least two drainage blocks, and the drainage channel is formed between two adjacent drainage blocks and / or between the drainage block and the step portion.

[0008] According to some embodiments of the present invention, the length of the diversion block along the axial direction is equal to the length of the stepped portion along the axial direction, and the end face of the diversion block away from the oil baffle is disposed on the rotor body.

[0009] According to some embodiments of the present invention, the balancing block and at least two of the drainage blocks are spaced apart along the circumferential direction.

[0010] According to some embodiments of the present invention, the outer peripheral wall of the oil baffle is recessed inward to form an arc-shaped notch, and the two arc-shaped ends of the oil baffle adjacent to the arc-shaped notch are respectively formed with abutting parts, and the two abutting parts are respectively abutted and fixed to the two steps.

[0011] According to some embodiments of the present invention, the outline of the arc-shaped notch is adapted to the shape of the protrusion, and the arc-shaped notch and the protrusion are fitted together.

[0012] According to some embodiments of the present invention, the balance block has an arc-shaped structure, and the length of the protrusion along the axial direction is less than or equal to the length of the step along the axial direction.

[0013] According to some embodiments of the present invention, the oil baffle is integrally formed with at least two of the drainage blocks.

[0014] A second aspect of this invention provides an electric motor comprising the rotor assembly for an electric motor as described in any of the preceding embodiments. The electric motor according to an embodiment of this invention can promote the settling of refrigeration oil, improve airflow discharge efficiency, and enhance the connection stability between the balance block and the oil baffle.

[0015] A third aspect of this utility model provides a compressor comprising the motor described in any of the preceding embodiments. The compressor according to an embodiment of this utility model can promote the settling of refrigeration oil, improve airflow discharge efficiency, and enhance the connection stability between the balance block and the oil baffle.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of a rotor assembly for an electric motor according to an embodiment of the present utility model;

[0018] Figure 2 This is a second schematic diagram of the rotor assembly for an electric motor according to an embodiment of the present utility model;

[0019] Figure 3 This is an exploded view of the rotor assembly for an electric motor according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the balance block for the rotor assembly of an electric motor according to an embodiment of the present invention;

[0021] Figure 5 This is one of the structural schematic diagrams of an oil baffle for a rotor assembly of an electric motor according to an embodiment of the present invention;

[0022] Figure 6 This is a second schematic diagram of the structure of the oil baffle plate for the rotor assembly of an electric motor according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 10, rotor body; 11, end plate; 20, balance block; 21, protrusion; 22, step; 30, oil baffle; 31, abutment; 32, arc-shaped notch; 33, diversion block; 34, diversion channel; 35, center hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In related technologies, the rotor structure of a compressor generally consists of a rotor core, magnets, end plates, balance blocks, and oil baffles. The end plates are located on the end faces of the rotor core, the balance blocks are located on the end plates, and the oil baffles are located on the end faces of the balance blocks furthest from the rotor core. This changes the direction of the airflow discharged from the rotor core, causing the airflow to discharge radially and reducing the compressor's oil discharge. However, the fit between the oil baffles, balance blocks, and rotor core in this type of rotor structure is relatively poor, and the oil baffles are isolated from the rotor core, resulting in relatively low airflow discharge efficiency.

[0028] Therefore, this utility model embodiment provides a rotor assembly for an electric motor, an electric motor, and a compressor. The rotor assembly for an electric motor, the electric motor, and the compressor according to this utility model embodiment can promote the settling of refrigeration oil, improve airflow discharge efficiency, and enhance the connection stability between the balance block 20 and the oil baffle 30.

[0029] Please see Figures 1 to 6 The first aspect of this utility model provides a rotor assembly for an electric motor, including a rotor body 10, a balance block 20, and an oil baffle 30; the rotor body 10 has an airflow channel; the balance block 20 is disposed on the end face of the rotor body 10, and the end face of the balance block 20 away from the rotor body 10 has a protrusion 21 and a stepped portion 22 located on both sides of the protrusion 21; the oil baffle 30 is disposed on the two stepped portions 22 and the rotor body 10, and the oil baffle 30 has a drainage channel 34, which is connected to the airflow channel.

[0030] The rotor body 10 of this invention includes a rotor core and magnets. The rotor core has a groove for accommodating the magnets, and an airflow channel extends through both ends of the rotor core along its axial direction. Furthermore, an end plate 11 is provided on the end face of the rotor core to prevent the balance block 20 and the oil baffle 30 from directly contacting the rotor core.

[0031] Therefore, according to the rotor assembly for motor of this utility model, by providing a stepped portion 22 on the balance block 20 and connecting and fixing the oil baffle 30 to the stepped portion 22 of the balance block 20 and the rotor body 10 respectively, the compactness of the connection between the balance block 20, the oil baffle 30 and the rotor body 10 is greatly improved, effectively enhancing the connection stability between the balance block 20 and the oil baffle 30. In addition, by providing a drainage channel 34 on the oil baffle 30 and connecting the drainage channel 34 to the airflow channel of the rotor body 10, the oil baffle 30 can ensure that a large amount of refrigerant oil is blocked and settles, while not affecting the smooth passage of gaseous refrigerant. Furthermore, the drainage effect of the drainage channel 34 effectively improves the airflow discharge efficiency.

[0032] In some embodiments of this utility model, the oil baffle 30 has a central hole 35 through which the crankshaft passes along the axial direction in the middle. The end face of the oil baffle 30 near the rotor body 10 has at least two guide blocks 33, and a guide channel 34 is formed between two adjacent guide blocks 33 and / or between the guide block 33 and the step portion 22. It can be understood that in these embodiments, a guide channel 34 can be formed between the guide blocks 33, and a guide channel 34 can also be formed between the guide block 33 closest to the step portion 22 and the step portion 22. In all these cases, the airflow discharged from the airflow channel can be changed to be discharged radially, and the gas discharge efficiency can be effectively improved by utilizing the guiding effect of the guide channel 34.

[0033] In some embodiments of this utility model, the length of the diversion block 33 along the axial direction is equal to the length of the step portion 22 along the axial direction, and the end face of the diversion block 33 away from the oil baffle 30 is disposed on the rotor body 10. Furthermore, in these embodiments, the balance block 20 and at least two diversion blocks 33 are spaced apart along the circumferential direction, which can be understood as the balance block 20 and at least two diversion blocks 33 all being located on the same circle.

[0034] In some embodiments of this invention, the oil baffle 30 is integrally formed with at least two diversion blocks 33. Furthermore, in these embodiments, the diversion blocks 33 can be riveted to the rotor body 10.

[0035] In some embodiments of this utility model, the outer peripheral wall of the oil baffle 30 is recessed inward to form an arc-shaped notch 32, and the two arc-shaped ends of the oil baffle 30 adjacent to the arc-shaped notch 32 are respectively formed with abutting parts 31, and the two abutting parts 31 are respectively abutted and fixed with the two step parts 22.

[0036] Furthermore, in these embodiments, the outline of the arc-shaped notch 32 is adapted to the shape of the protrusion 21, and the arc-shaped notch 32 and the protrusion 21 are closely connected. It can be understood that in these embodiments, by designing an arc-shaped notch 32 with clearance on the oil baffle 30, and making the outline of the arc-shaped notch 32 the same as the inner arc and the outlines on both sides of the protrusion 21, the oil baffle 30 can fit against the side wall of the protrusion 21 through the arc-shaped notch 32, and the abutment portions 31 on both sides of the arc-shaped notch 32 correspond one-to-one with the two stepped portions 22 of the balance block 20. The stepped portions 22 and the abutment portions 31 can be riveted to the rotor body 10. Similarly, the protrusion 21 can be riveted to the rotor body 10. In this way, the connection between the balance block 20 and the oil baffle 30 is more compact and reasonable, and the stability of the connection between the two is improved, making it less likely for them to detach.

[0037] In some embodiments of this utility model, the balance block 20 has an arc-shaped structure, and the length of the protrusion 21 along the axial direction is less than or equal to the length of the step 22 along the axial direction.

[0038] The following is combined Figures 1 to 6 The following is a detailed description of a specific embodiment of the rotor assembly for an electric motor according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as limiting the present invention.

[0039] like Figures 1 to 6 As shown, this embodiment provides a rotor assembly for a motor, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an airflow channel. The balance block 20 is disposed on the end face of the rotor body 10, and the end face of the balance block 20 away from the rotor body 10 has a protrusion 21 and stepped portions 22 located on both sides of the protrusion 21. The oil baffle 30 is disposed on the two stepped portions 22 and the rotor body 10, and has a drainage channel 34 connected to the airflow channel. The rotor body 10 of this embodiment includes a rotor core and a magnet. The rotor core has a groove for accommodating the magnet, and the airflow channel passes through both ends of the rotor core along its axial direction. Furthermore, an end plate 11 is provided on the end face of the rotor core to prevent the balance block 20 and the oil baffle 30 from directly contacting the rotor core.

[0040] Specifically, in this embodiment, the oil baffle 30 has a central hole 35 extending axially through its center for the crankshaft to pass through. Two drainage blocks 33 are located on the end face of the oil baffle 30 near the rotor body 10. Drainage channels 34 can be formed between the two drainage blocks 33 and between the drainage blocks 33 and the stepped portion 22. Further, in this embodiment, the axial length of the drainage blocks 33 is equal to the axial length of the stepped portion 22, and the end face of the drainage blocks 33 away from the oil baffle 30 is fixed to the rotor body 10. In addition, the balance block 20 and the two drainage blocks 33 are spaced apart circumferentially, and the oil baffle 30 and the two drainage blocks 33 are integrally formed.

[0041] Furthermore, in this embodiment, the outer peripheral wall of the oil baffle 30 is recessed inward to form an arc-shaped notch 32. Abutment portions 31 are formed at the two arc-shaped ends of the oil baffle 30 adjacent to the arc-shaped notch 32, and the two abutment portions 31 are respectively abutted and fixed to the two stepped portions 22. The outline of the arc-shaped notch 32 matches the shape of the protrusion 21, and the arc-shaped notch 32 and the protrusion 21 are fitted together.

[0042] In addition, the balance block 20 in this embodiment has an arc-shaped structure, and the length of the protrusion 21 in the axial direction is less than the length of the step 22 in the axial direction.

[0043] The following is combined Figures 1 to 6 The following is a detailed description of a specific embodiment of the rotor assembly for an electric motor according to the present invention. It is worth understanding that the following is merely an illustrative description and should not be construed as limiting the present invention.

[0044] like Figures 1 to 6 As shown, this embodiment provides a rotor assembly for a motor, including a rotor body 10, a balance block 20, and an oil baffle 30. The rotor body 10 has an airflow channel. The balance block 20 is disposed on the end face of the rotor body 10, and the end face of the balance block 20 away from the rotor body 10 has a protrusion 21 and stepped portions 22 located on both sides of the protrusion 21. The oil baffle 30 is disposed on the two stepped portions 22 and the rotor body 10, and has a drainage channel 34 connected to the airflow channel. The rotor body 10 of this embodiment includes a rotor core and a magnet. The rotor core has a groove for accommodating the magnet, and the airflow channel passes through both ends of the rotor core along its axial direction. Furthermore, an end plate 11 is provided on the end face of the rotor core to prevent the balance block 20 and the oil baffle 30 from directly contacting the rotor core.

[0045] Specifically, in this embodiment, the oil baffle 30 has a central hole 35 extending axially through its center for the crankshaft to pass through. The end face of the oil baffle 30 near the rotor body 10 has three drainage blocks 33. Drainage channels 34 can be formed between adjacent drainage blocks 33 and between the drainage blocks 33 and the step portion 22. Further, in this embodiment, the axial length of the drainage blocks 33 is equal to the axial length of the step portion 22, and the end face of the drainage blocks 33 away from the oil baffle 30 is fixed to the rotor body 10. In addition, the balance block 20 and the three drainage blocks 33 are spaced apart circumferentially. The balance block 20 has an arc-shaped structure, and the axial length of the protrusion 21 is less than the axial length of the step portion 22.

[0046] Furthermore, in this embodiment, the outer peripheral wall of the oil baffle 30 is recessed inward to form an arc-shaped notch 32. Abutment portions 31 are formed at the two arc-shaped ends of the oil baffle 30 adjacent to the arc-shaped notch 32, and the two abutment portions 31 are respectively abutted and fixed to the two stepped portions 22. The outline of the arc-shaped notch 32 matches the shape of the protrusion 21, and the arc-shaped notch 32 and the protrusion 21 are closely connected. In addition, in this embodiment, the oil baffle 30 and the three drainage blocks 33 are integrally formed.

[0047] A second aspect of this invention provides an electric motor comprising the rotor assembly for an electric motor as described above. The electric motor according to an embodiment of this invention can promote the settling of refrigeration oil, improve airflow discharge efficiency, and enhance the connection stability between the balance block 20 and the oil baffle 30.

[0048] A third aspect of this utility model provides a compressor that includes the motor of any of the above-mentioned types. The compressor according to an embodiment of this utility model can promote the settling of refrigeration oil, improve airflow discharge efficiency, and enhance the connection stability between the balance block 20 and the oil baffle 30.

[0049] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model for use in rotor assemblies of motors, motors, and compressors. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A rotor assembly for an electric motor, characterized in that: The device includes a rotor body, a balance block, and an oil baffle plate. The rotor body has an airflow channel. The balance block is disposed on the end face of the rotor body, and the end face of the balance block away from the rotor body has a protrusion and steps on both sides of the protrusion. The oil baffle plate is disposed on the two steps and the rotor body, and the oil baffle plate has a drainage channel that is connected to the airflow channel.

2. The rotor assembly for an electric motor according to claim 1, characterized in that: The oil baffle has a central hole through which the crankshaft passes along the axial direction in the middle. The end face of the oil baffle near the rotor body has at least two drainage blocks, and the drainage channel is formed between two adjacent drainage blocks and / or between the drainage block and the step portion.

3. The rotor assembly for an electric motor according to claim 2, characterized in that: The length of the diverting block along the axial direction is equal to the length of the stepped portion along the axial direction, and the end face of the diverting block away from the oil baffle is disposed on the rotor body.

4. The rotor assembly for an electric motor according to claim 2, characterized in that: The balancing block and at least two of the drainage blocks are spaced apart along the circumferential direction.

5. The rotor assembly for an electric motor according to claim 1, characterized in that: The outer peripheral wall of the oil baffle is recessed inward to form an arc-shaped notch. The two arc-shaped ends of the oil baffle adjacent to the arc-shaped notch are respectively formed with abutting parts, and the two abutting parts are respectively abutted and fixed to the two steps.

6. The rotor assembly for an electric motor according to claim 5, characterized in that: The outline of the arc-shaped notch is adapted to the shape of the protrusion, and the arc-shaped notch and the protrusion are fitted together.

7. The rotor assembly for an electric motor according to claim 1, characterized in that: The balance block has an arc-shaped structure, and the length of the protrusion along the axial direction is less than or equal to the length of the step along the axial direction.

8. The rotor assembly for an electric motor according to claim 2, characterized in that: The oil baffle is integrally formed with at least two of the drainage blocks.

9. An electric motor, characterized in that: Includes a rotor assembly for an electric motor as described in any one of claims 1 to 8.

10. A compressor, characterized in that: Includes the motor according to claim 9.

Images