A rotor assembly, electric machine and compressor

Abstract

The utility model relates to a rotor assembly, motor and compressor, rotor assembly includes rotor core, balance weight, baffle, balance weight is arc block structure, balance weight sets up on the end face of rotor core, the end face of balance weight is away from rotor core is connected with baffle respectively on the both sides of its circumferential direction, and the end of two baffles is away from balance weight respectively abuts on the end face of rotor core, and the projection of two baffles in the circumferential direction of balance weight respectively covers in the both sides of balance weight in its circumferential direction, and the side of two baffles is away from balance weight forms the windward surface respectively. The rotor assembly of the utility model, through the cooperation between two baffles and balance weight, can reduce the energy loss produced by the flow field impact when rotor assembly rotates, and is helpful to the oil gas separation of compressor, improves the compressor performance.

Description

Technical Field

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

[0002] A compressor generally consists of a housing, a motor fixed inside the housing that provides rotational power, and a pump body for compressing the refrigerant. The motor mainly consists of a stator and a rotor. During motor operation, the unbalanced force and torque generated by the eccentric rotation of the rotor cause increased compressor vibration and waste power. Therefore, to reduce the adverse effects of unbalanced forces, arc-shaped balance weights are usually added to the upper and lower end faces of the rotor to reduce these unbalanced forces.

[0003] In addition, to reduce the amount of oil discharged from the compressor, an oil baffle is installed at the end of the balance block furthest from the rotor. This baffle prevents lubricating oil from being discharged vertically upwards from the rotor's vent. However, since the balance block is usually an arc-shaped structure, its two air-facing surfaces at the arc end are completely exposed to the flow field. During rotation, the balance block can easily impact the flow field above the muffler cover, leading to adverse phenomena such as energy loss and oil level deterioration in the compressor. Utility Model Content

[0004] Therefore, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotor assembly, a motor, and a compressor. According to embodiments of this utility model, the rotor assembly, motor, and compressor, through the cooperation between the two baffles and the balance block, can reduce the energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitate oil-gas separation in the compressor, thereby improving compressor performance.

[0005] To achieve the above objectives, a first aspect of this utility model provides a rotor assembly, including a rotor core, a counterweight, and baffles. The counterweight is an arc-shaped block structure and is disposed on the end face of the rotor core. The baffles are respectively connected to the two ends of the counterweight away from the rotor core in the circumferential direction. The ends of the two baffles away from the counterweight abut against the end face of the rotor core, and the projections of the two baffles in the circumferential direction of the counterweight cover the two sides of the counterweight in the circumferential direction. The sides of the two baffles away from the counterweight form windward surfaces.

[0006] Therefore, according to the rotor assembly of this utility model embodiment, by providing two baffles on the rotor core and the balance block, and making the two baffles form a shield on both sides of the balance block in the circumferential direction, the side of the two baffles away from the balance block can form a windward surface. The shielding effect of the two baffles can effectively prevent the balance block from being exposed to the flow field on both sides in the circumferential direction, thereby effectively reducing the energy loss caused by the impact of the rotor assembly on the flow field during rotation. Under the guiding and blocking effect of the windward surface, when the airflow impacts the windward surface, part of it undergoes oil-gas separation, and part of it impacts the inner circumferential wall of the housing along the inclined direction of the windward surface, further increasing the impact area of ​​the airflow, thereby helping the compressor to separate oil and gas and improve the performance of the compressor.

[0007] In one embodiment, the baffle plate includes a baffle portion and abutment portions connected to both ends of the baffle portion. The baffle portion and the side of the balance block are spaced apart in the circumferential direction. The two abutment portions abut against the balance block and the rotor core, respectively.

[0008] In one embodiment, the connection between the blocking part and the two abutting parts is arc-shaped.

[0009] In one embodiment, the included angle formed between the blocking portion and the two abutting portions is greater than or equal to 90°.

[0010] In one embodiment, the shielding part and the two abutting parts are integrally formed.

[0011] In one embodiment, the projected area of ​​the two baffles in the circumferential direction of the balance block is greater than or equal to the area of ​​the side surface of the balance block in the circumferential direction.

[0012] In one implementation, the two shields are spaced apart.

[0013] In one embodiment, the abutting part is provided with a first riveting hole, the balance block is provided with a second riveting hole that is coaxial with the first riveting hole and has the same size, and the rotor core is provided with a third riveting hole that is coaxial with the first riveting hole and has the same size.

[0014] A second aspect of this utility model provides an electric motor comprising the rotor assembly described in any of the preceding embodiments. According to this utility model, the motor, through the cooperation between two baffles and a balance block, can reduce energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitates oil-gas separation in the compressor, thereby improving compressor performance.

[0015] A third aspect of this utility model provides a compressor comprising the motor described in any of the preceding embodiments. According to this utility model, the compressor, through the cooperation between two baffles and a balance block, can reduce energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitates oil-gas separation in the compressor, thereby improving compressor performance.

[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 the rotor assembly according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 An enlarged schematic diagram of part A shown;

[0019] Figure 3 This is a second schematic diagram of the rotor assembly according to an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the rotor assembly according to an embodiment of the present utility model;

[0021] Figure 5 This is one of the structural schematic diagrams of the shielding plate according to an embodiment of the present utility model;

[0022] Figure 6 This is a second schematic diagram of the structure of the shielding plate according to an embodiment of the present utility model;

[0023] Figure 7 This is the third schematic diagram of the structure of the shielding plate in this embodiment of the present utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Rotor core; 11. Rivet; 12. Third riveting hole; 20. Balance block; 21. Second riveting hole; 30. Baffle plate; 31. Baffle part; 32. Windward side; 33. Abutting part; 34. First riveting hole. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In related technologies, a compressor generally consists of a housing, a motor fixed inside the housing that provides rotational power, and a pump body for compressing the refrigerant. The motor mainly consists of a stator and a rotor. During motor operation, the unbalanced force and torque generated by the eccentric rotation of the rotor intensifies compressor vibration and produces wasted work. Therefore, to reduce the adverse effects of unbalanced forces, arc-shaped balance blocks are usually added to the upper and lower end faces of the rotor to reduce the unbalanced force. Furthermore, to reduce the compressor's oil discharge, an oil baffle is installed at the end of the balance block furthest from the rotor, preventing lubricating oil from being discharged vertically upwards through the rotor's vent. However, since the balance block is usually arc-shaped, its two air-facing surfaces at the arc end are completely exposed to the flow field. During rotation, the balance block easily impacts the flow field above the muffler cover, leading to energy loss and oil level deterioration in the compressor.

[0030] Therefore, this utility model embodiment provides a rotor assembly, a motor, and a compressor. According to this utility model embodiment, the rotor assembly, motor, and compressor, through the cooperation between the two baffles 30 and the balance block 20, can reduce the energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitate oil-gas separation in the compressor, thereby improving compressor performance.

[0031] Please see Figures 1 to 7The first aspect of this utility model provides a rotor assembly, including a rotor core 10, a balance block 20, and a baffle plate 30. The balance block 20 has an arc block structure and is disposed on the end face of the rotor core 10. The end face of the balance block 20 away from the rotor core 10 is connected to the baffle plate 30 on both sides near its circumference. The ends of the two baffle plates 30 away from the balance block 20 respectively abut against the end face of the rotor core 10, and the projections of the two baffle plates 30 in the circumferential direction of the balance block 20 respectively cover the two sides of the balance block 20 in the circumferential direction. The sides of the two baffle plates 30 away from the balance block 20 respectively form a windward surface 32.

[0032] Specifically, in this embodiment of the invention, the projected area of ​​the two baffles 30 on the circumference of the balance block 20 is greater than or equal to the area of ​​the lateral surface of the balance block 20 on its circumference. The baffle 30 in this embodiment includes a blocking portion 31 and abutment portions 33 connected to both ends of the blocking portion 31. The blocking portion 31 is spaced apart from the lateral surface of the balance block 20 on its circumference, and the two abutment portions 33 abut against the balance block 20 and the rotor core 10, respectively. Furthermore, the two baffles 30 in this embodiment are spaced apart, meaning they are not connected end-to-end. This saves material costs compared to using a ring-shaped oil baffle.

[0033] Therefore, according to the rotor assembly of this utility model embodiment, by providing two baffles 30 on the rotor core 10 and the balance block 20, and making the two baffles 30 form a shield on both sides of the balance block 20 in the circumferential direction, the side of the two baffles 30 away from the balance block 20 can form a windward surface 32. The shielding effect of the two baffles 30 can effectively prevent the balance block 20 from being exposed to the flow field on both sides in the circumferential direction, thereby effectively reducing the energy loss caused by the impact of the rotor assembly on the flow field during rotation. Under the guiding and blocking effect of the windward surface 32, when the airflow impacts the windward surface 32, part of it is separated into oil and gas, and part of it impacts the inner circumferential wall of the housing along the inclined direction of the windward surface 32, further increasing the impact area of ​​the airflow, thereby helping the compressor to separate oil and gas and improve the performance of the compressor.

[0034] Optionally, in some embodiments of this utility model, the connection between the blocking part 31 and the two abutting parts 33 is arc-shaped. This can be understood as the blocking part 31 and the abutting parts 33 employing an arc-shaped transition design in these embodiments.

[0035] Optionally, in some embodiments of this utility model, the included angle formed between the blocking portion 31 and the two abutting portions 33 is greater than or equal to 90°. It can be understood that in these embodiments, the blocking portion 31 and the abutting portion 33 adopt a right angle or obtuse angle transition design.

[0036] Optionally, in some embodiments of this utility model, the shielding part 31 and the two abutting parts 33 are integrally formed.

[0037] Optionally, in some embodiments of this utility model, the abutment portion 33 is provided with a first riveting hole 34, the balance block 20 is provided with a second riveting hole 21 that is coaxial with the first riveting hole 34 and has the same size, and the rotor core 10 is provided with a third riveting hole 12 that is coaxial with the first riveting hole 34 and has the same size. That is, in these embodiments, the two abutment portions 33 of the baffle plate 30 are respectively provided with a first riveting hole 34 for the rivet 11 to pass through, the balance block 20 is provided with a second riveting hole 21 corresponding to the first riveting hole 34, and the rotor core 10 is provided with a third riveting hole 12 corresponding to the first riveting hole 34, so that the two baffle plates 30 and the balance block 20 can be riveted and fixed to the rotor core 10 by the rivets 11.

[0038] The following is combined with Figures 1 to 7 The following is a detailed description of a specific embodiment of the rotor assembly 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] This embodiment provides a rotor assembly, including a rotor core 10, a balance block 20, and baffle plates 30. The balance block 20 has an arc block structure and is disposed on the end face of the rotor core 10. The end face of the balance block 20 away from the rotor core 10 is connected to baffle plates 30 on both sides near its circumference. The ends of the two baffle plates 30 away from the balance block 20 respectively abut against the end face of the rotor core 10, and the projections of the two baffle plates 30 in the circumferential direction of the balance block 20 respectively cover the two sides of the balance block 20 in the circumferential direction. The sides of the two baffle plates 30 away from the balance block 20 respectively form windward surfaces 32.

[0040] Specifically, in this embodiment, the projected area of ​​the two baffle plates 30 on the circumference of the balance block 20 is equal to the area of ​​the side surface of the balance block 20 in its circumference direction, and the two baffle plates 30 are respectively spaced apart. Further, in this embodiment, the baffle plate 30 includes a blocking part 31 and an abutting part 33 connected to both ends of the blocking part 31. The blocking part 31 and the side surface of the balance block 20 in its circumference direction are spaced apart, and the two abutting parts 33 abut against the balance block 20 and the rotor core 10 respectively.

[0041] To facilitate the connection and fixation between the rotor core 10, the balance block 20, and the two baffle plates 30, in this embodiment, the abutment portion 33 is provided with a first riveting hole 34, the balance block 20 is provided with a second riveting hole 21 that is coaxial with the first riveting hole 34 and has the same size, and the rotor core 10 is provided with a third riveting hole 12 that is coaxial with the first riveting hole 34 and has the same size. That is, in this embodiment, the two abutment portions 33 of the baffle plate 30 are respectively provided with a first riveting hole 34 for rivets 11 to pass through, the balance block 20 is provided with a second riveting hole 21 corresponding to the first riveting hole 34, and the rotor core 10 is provided with a third riveting hole 12 corresponding to the first riveting hole 34, so that the two baffle plates 30 and the balance block 20 can be riveted and fixed to the rotor core 10 by rivets 11.

[0042] Furthermore, in this embodiment, the shielding part 31 and the two abutting parts 33 are integrally formed; the connection between the shielding part 31 and the two abutting parts 33 is arc-shaped.

[0043] The following is combined with Figures 1 to 7 The following is a detailed description of a specific embodiment of the rotor assembly 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] This embodiment provides a rotor assembly, including a rotor core 10, a balance block 20, and baffle plates 30. The balance block 20 has an arc block structure and is disposed on the end face of the rotor core 10. The end face of the balance block 20 away from the rotor core 10 is connected to baffle plates 30 on both sides near its circumference. The ends of the two baffle plates 30 away from the balance block 20 respectively abut against the end face of the rotor core 10, and the projections of the two baffle plates 30 in the circumferential direction of the balance block 20 respectively cover the two sides of the balance block 20 in the circumferential direction. The sides of the two baffle plates 30 away from the balance block 20 respectively form windward surfaces 32.

[0045] Specifically, in this embodiment, the projected area of ​​the two baffle plates 30 in the circumferential direction of the balance block 20 is larger than the area of ​​the side surface of the balance block 20 in the circumferential direction, and the two baffle plates 30 are respectively spaced apart. Further, in this embodiment, the baffle plate 30 includes a blocking part 31 and an abutting part 33 connected to both ends of the blocking part 31. The blocking part 31 is spaced apart from the side surface of the balance block 20 in the circumferential direction, and the two abutting parts 33 abut against the balance block 20 and the rotor core 10 respectively.

[0046] To facilitate the connection and fixation between the rotor core 10, the balance block 20, and the two baffle plates 30, in this embodiment, the abutment portion 33 is provided with a first riveting hole 34, the balance block 20 is provided with a second riveting hole 21 that is coaxial with the first riveting hole 34 and has the same size, and the rotor core 10 is provided with a third riveting hole 12 that is coaxial with the first riveting hole 34 and has the same size. That is, in this embodiment, the two abutment portions 33 of the baffle plate 30 are respectively provided with a first riveting hole 34 for rivets 11 to pass through, the balance block 20 is provided with a second riveting hole 21 corresponding to the first riveting hole 34, and the rotor core 10 is provided with a third riveting hole 12 corresponding to the first riveting hole 34, so that the two baffle plates 30 and the balance block 20 can be riveted and fixed to the rotor core 10 by rivets 11.

[0047] Furthermore, in this embodiment, the shielding part 31 and the two abutting parts 33 are integrally formed; the included angle formed between the shielding part 31 and the two abutting parts 33 is greater than 90°.

[0048] A second aspect of this utility model provides an electric motor comprising the rotor assembly described above. According to this utility model embodiment, the motor, through the cooperation between the two baffles 30 and the balance block 20, can reduce energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitates oil-gas separation in the compressor, thereby improving compressor performance.

[0049] A third aspect of this utility model provides a compressor that includes the motor described in any of the above embodiments. According to this utility model, the compressor, through the cooperation between the two baffles 30 and the balance block 20, can reduce the energy loss caused by the impact on the flow field during rotor assembly rotation, and also facilitates oil-gas separation in the compressor, thereby improving compressor performance.

[0050] 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 rotor assembly, motor, and compressor of this utility model. 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 all fall within the protection scope of this utility model.

Claims

1. A rotor assembly, characterized in that: The device includes a rotor core, a counterweight, and baffles. The counterweight is an arc-shaped block structure and is disposed on the end face of the rotor core. The baffles are connected to the two sides of the end face of the counterweight away from the rotor core in the circumferential direction. The ends of the two baffles away from the counterweight abut against the end face of the rotor core, and the projections of the two baffles in the circumferential direction of the counterweight cover the two sides of the counterweight in the circumferential direction. The sides of the two baffles away from the counterweight form windward surfaces.

2. The rotor assembly according to claim 1, characterized in that: The shielding plate includes a shielding part and abutting parts connected to both ends of the shielding part. The shielding part and the side of the balance block are spaced apart in the circumferential direction. The two abutting parts abut against the balance block and the rotor core, respectively.

3. The rotor assembly according to claim 2, characterized in that: The connection between the shielding part and the two abutting parts is arc-shaped.

4. The rotor assembly according to claim 2, characterized in that: The included angle between the blocking part and the two abutting parts is greater than or equal to 90°.

5. The rotor assembly according to claim 2, characterized in that: The shielding part and the two abutting parts are integrally formed.

6. The rotor assembly according to claim 1, characterized in that: The projected area of ​​the two baffles in the circumferential direction of the balance block is greater than or equal to the area of ​​the side surface of the balance block in the circumferential direction.

7. The rotor assembly according to claim 1, characterized in that: The two shields are spaced apart.

8. The rotor assembly according to claim 2, characterized in that: The abutment portion is provided with a first riveting hole, the balance block is provided with a second riveting hole that is coaxial with the first riveting hole and has the same size, and the rotor core is provided with a third riveting hole that is coaxial with the first riveting hole and has the same size.

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

10. A compressor, characterized in that: Includes the motor as described in claim 9.

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