A rotor assembly, electric machine and compressor

Abstract

This utility model relates to a rotor assembly, a motor, and a compressor. The rotor assembly includes a rotor core, a balance block, and an oil baffle. The balance block is disposed on the end face of the rotor core. The oil baffle includes a first stepped surface, a second stepped surface, and two bent portions connecting the first and second stepped surfaces. The first stepped surface is disposed on the end face of the rotor core where the balance block is disposed, and the second stepped surface is disposed on the end face of the balance block away from the rotor core. The two bent portions are respectively disposed near the two ends of the balance block in the circumferential direction and form a shield in the circumferential direction of the balance block. The sides of the two bent portions away from the balance block respectively form windward surfaces. The rotor assembly of this utility model, through the cooperation between the oil baffle and the balance block, can reduce the energy loss caused by the impact on the flow field during rotor assembly rotation, and also helps with oil-gas separation in the compressor, improving 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] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotor assembly, motor and compressor. Through the cooperation between the oil baffle and the balance block, the energy loss caused by the impact on the flow field when the rotor assembly rotates can be reduced, and it can help the compressor to separate oil and gas and improve the compressor performance.

[0005] To achieve the above objectives, a first aspect of this utility model provides a rotor assembly, including a rotor core, a balance block, and an oil baffle. The balance block is disposed on the end face of the rotor core, and the oil baffle includes a first stepped surface, a second stepped surface, and two bent portions for connecting the first stepped surface and the second stepped surface. The first stepped surface is disposed on the end face of the rotor core on which the balance block is disposed, and the second stepped surface is disposed on the end face of the balance block away from the rotor core. The two bent portions are respectively disposed adjacent to both ends of the balance block in the circumferential direction and form a shield in the circumferential direction of the balance block, and the sides of the two bent portions away from the balance block respectively form windward surfaces.

[0006] Therefore, according to the rotor assembly of this utility model embodiment, by providing an oil baffle on the end face of the rotor core, specifically by providing a first step surface and a second step surface of the oil baffle on the end face of the rotor core and the end face of the balance block respectively, and by connecting the first step surface and the second step surface through two bends respectively, and by setting the bends adjacent to the two ends of the balance block in the circumferential direction and forming a shield in the circumferential direction of the balance block, the side of the two bends away from the balance block can form a windward surface. The shielding of the two bends can effectively prevent the two end faces of the balance block in the circumferential direction from being exposed to the flow field, which can effectively reduce the energy loss caused by the impact of the rotor assembly on the flow field when rotating, and help the compressor to separate oil and gas and improve the compressor performance.

[0007] In one embodiment, the oil baffle includes a first arc-shaped portion and a second arc-shaped portion, a first stepped surface is formed on the end face of the first arc-shaped portion, a second stepped surface is formed on the end face of the second arc-shaped portion, and the two bent portions are respectively used to connect the first arc-shaped portion and the second arc-shaped portion.

[0008] In one embodiment, the first arc-shaped portion, the second arc-shaped portion, and the two bent portions are integrally formed.

[0009] In one embodiment, the projection of the second arcuate portion in the axial direction completely covers the balance block, and the projected area of ​​the second arcuate portion in the axial direction is greater than or equal to the projected area of ​​the balance block in the axial direction.

[0010] In one embodiment, the oil baffle plate has an annular projection shape in the axial direction.

[0011] In one embodiment, the connection surfaces between the bent portion and the first arc-shaped portion and the second arc-shaped portion are both arc-shaped transition surfaces.

[0012] In one embodiment, the first arc-shaped portion is riveted to the rotor core by rivets, and the second arc-shaped portion and the balance block are riveted to the rotor core by rivets.

[0013] In one embodiment, the projections of the two bent portions in the circumferential direction of the balance block completely cover the side surface of the balance block in the circumferential direction.

[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 the oil baffle and the balance block, 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.

[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 the oil baffle and the 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 This is an exploded view of the rotor assembly according to an embodiment of the present utility model;

[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 the third schematic diagram 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 oil baffle plate according to an embodiment of the present utility model;

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

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

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

[0025] 10. Rotor core; 11. Rivet; 20. Balance block; 30. Oil baffle; 31. First arc-shaped part; 32. Second arc-shaped part; 33. Bending part; 34. Windward side; 35. First step surface; 36. Second step surface. 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 provides a rotor assembly, a motor, and a compressor. According to this utility model, the rotor assembly, motor, and compressor, through the cooperation between the oil baffle 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.

[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 an oil baffle 30. The balance block 20 is disposed on the end face of the rotor core 10. The oil baffle 30 includes a first stepped surface 35, a second stepped surface 36, and two bent portions 33 for connecting the first stepped surface 35 and the second stepped surface 36. The first stepped surface 35 is disposed on the end face of the rotor core 10 where the balance block 20 is disposed, and the second stepped surface 36 is disposed on the end face of the balance block 20 away from the rotor core 10. The two bent portions 33 are respectively disposed adjacent to both ends of the balance block 20 in the circumferential direction and form a shield in the circumferential direction of the balance block 20. The side of the two bent portions 33 away from the balance block 20 respectively forms a windward surface 34.

[0032] Therefore, according to the rotor assembly of this utility model embodiment, by providing an oil baffle 30 on the end face of the rotor core 10, specifically by providing a first step surface 35 and a second step surface 36 on the end face of the rotor core 10 and the end face of the balance block 20 respectively, and by connecting the first step surface 35 and the second step surface 36 respectively through two bent portions 33, and by providing the bent portions 33 near the two ends of the balance block 20 in the circumferential direction and forming a shield in the circumferential direction of the balance block 20, the side of the two bent portions 33 away from the balance block 20 can form a windward surface 34. The shielding of the two bent portions 33 can effectively prevent the two end faces of the balance block 20 in the circumferential direction from being exposed to the flow field, which can effectively reduce the energy loss caused by the impact of the flow field when the rotor assembly rotates, and help the compressor to separate oil and gas and improve the compressor performance.

[0033] In this embodiment of the invention, the oil baffle 30 includes a first arc-shaped portion 31 and a second arc-shaped portion 32. A first stepped surface 35 is formed on the end face of the first arc-shaped portion 31, and a second stepped surface 36 is formed on the end face of the second arc-shaped portion 32. Two bent portions 33 are used to connect the first arc-shaped portion 31 and the second arc-shaped portion 32, respectively. Further, in this embodiment of the invention, the projection of the second arc-shaped portion 32 in the axial direction completely covers the balance block 20, and the projected area of ​​the second arc-shaped portion 32 in the axial direction is greater than or equal to the projected area of ​​the balance block 20 in the axial direction. Furthermore, in this embodiment of the invention, the projections of the two bent portions 33 on the circumferential direction of the balance block 20 completely cover the end face of the balance block 20 in the circumferential direction. In this way, when the balance block 20 rotates together with the rotor core 10, the shielding effect of the two bent portions 33 prevents the two ends of the balance block 20 in the circumferential direction from being exposed to the flow field. The windward surfaces 34 of the two bent portions 33 impact a portion of the oil-gas mixture, which can effectively reduce the energy loss caused by the balance block 20 impacting the flow field when the rotor assembly rotates, improve the oil-gas separation efficiency of the compressor, reduce the oil discharge, and improve the performance of the compressor.

[0034] Optionally, in some embodiments of this utility model, the first arc-shaped portion 31, the second arc-shaped portion 32, and the two bent portions 33 are integrally formed structures.

[0035] Optionally, in some embodiments of the present invention, the projected shape of the oil baffle 30 in the axial direction is annular; further, in these embodiments, the connection surfaces of the bent portion 33 with the first arc-shaped portion 31 and the second arc-shaped portion 32 are both arc-shaped transition surfaces.

[0036] Optionally, in some embodiments of the present invention, the first arc-shaped portion 31 is riveted to the rotor core 10 by rivets 11, and the second arc-shaped portion 32 and the balance block 20 are riveted to the rotor core 10 by rivets 11.

[0037] 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.

[0038] like Figures 1 to 7 As shown, this embodiment provides a rotor assembly, including a rotor core 10, a balance block 20, and an oil baffle 30. The balance block 20 is disposed on the end face of the rotor core 10. The oil baffle 30 includes a first stepped surface 35, a second stepped surface 36, and two bent portions 33 for connecting the first stepped surface 35 and the second stepped surface 36. The first stepped surface 35 is disposed on the end face of the rotor core 10 where the balance block 20 is disposed, and the second stepped surface 36 is disposed on the end face of the balance block 20 away from the rotor core 10. The two bent portions 33 are respectively disposed near the two ends of the balance block 20 in the circumferential direction and form a shield in the circumferential direction of the balance block 20. The side of the two bent portions 33 away from the balance block 20 respectively forms a windward surface 34.

[0039] In this embodiment, when the rotor assembly is applied to the compressor, the rotor assembly is coaxially disposed inside the compressor housing, and the end face of the rotor core 10 adjacent to the pump body inside the housing is provided with a balance block 20 and an oil baffle plate 30. That is to say, in this embodiment, the balance block 20 and the oil baffle plate 30 are assembled on the end face of the rotor core 10 adjacent to the pump body.

[0040] Specifically, the oil baffle 30 in this embodiment includes a first arc-shaped portion 31 and a second arc-shaped portion 32. A first stepped surface 35 is formed on the end face of the first arc-shaped portion 31, and a second stepped surface 36 is formed on the end face of the second arc-shaped portion 32. Two bent portions 33 are used to connect the first arc-shaped portion 31 and the second arc-shaped portion 32, respectively. Further, in this embodiment, the projection of the second arc-shaped portion 32 in the axial direction completely covers the balance block 20, and the projected area of ​​the second arc-shaped portion 32 in the axial direction is greater than or equal to the projected area of ​​the balance block 20 in the axial direction. Further, in this embodiment, the first arc-shaped portion 31 is riveted to the rotor core 10 by rivets 11, and the second arc-shaped portion 32 and the balance block 20 are riveted to the rotor core 10 by rivets 11.

[0041] In this embodiment, the first arc-shaped portion 31, the second arc-shaped portion 32, and the two bent portions 33 are integrally formed. Furthermore, the oil baffle 30 in this embodiment has a ring-shaped projection in the axial direction, and the connection surfaces between the bent portions 33 and the first arc-shaped portion 31 and the second arc-shaped portion 32 are both arc-shaped transition surfaces. It can be understood that the oil baffle 30 in this embodiment has a ring-shaped structure, which is stamped out using a stamping process to form the aforementioned structure with the first arc-shaped portion 31, the second arc-shaped portion 32, and the two bent portions 33.

[0042] 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.

[0043] like Figures 1 to 7 As shown, this embodiment provides a rotor assembly, including a rotor core 10, a balance block 20, and an oil baffle 30. The balance block 20 is disposed on the end face of the rotor core 10. The oil baffle 30 includes a first stepped surface 35, a second stepped surface 36, and two bent portions 33 for connecting the first stepped surface 35 and the second stepped surface 36. The first stepped surface 35 is disposed on the end face of the rotor core 10 where the balance block 20 is disposed, and the second stepped surface 36 is disposed on the end face of the balance block 20 away from the rotor core 10. The two bent portions 33 are respectively disposed near the two ends of the balance block 20 in the circumferential direction and form a shield in the circumferential direction of the balance block 20. The side of the two bent portions 33 away from the balance block 20 respectively forms a windward surface 34.

[0044] In this embodiment, when the rotor assembly is applied to the compressor, the rotor assembly is coaxially disposed inside the compressor housing, and the end face of the rotor core 10 that is away from the pump body inside the housing is provided with a balance block 20 and an oil baffle plate 30. That is to say, the balance block 20 and the oil baffle plate 30 in this embodiment are assembled on the end face of the rotor core 10 that is away from the pump body.

[0045] Specifically, the oil baffle 30 in this embodiment includes a first arc-shaped portion 31 and a second arc-shaped portion 32. A first stepped surface 35 is formed on the end face of the first arc-shaped portion 31, and a second stepped surface 36 is formed on the end face of the second arc-shaped portion 32. Two bent portions 33 are used to connect the first arc-shaped portion 31 and the second arc-shaped portion 32, respectively. Further, in this embodiment, the projection of the second arc-shaped portion 32 in the axial direction completely covers the balance block 20, and the projected area of ​​the second arc-shaped portion 32 in the axial direction is greater than or equal to the projected area of ​​the balance block 20 in the axial direction. Further, in this embodiment, the first arc-shaped portion 31 is riveted to the rotor core 10 by rivets 11, and the second arc-shaped portion 32 and the balance block 20 are riveted to the rotor core 10 by rivets 11.

[0046] In this embodiment, the first arc-shaped portion 31, the second arc-shaped portion 32, and the two bent portions 33 are integrally formed. Furthermore, the oil baffle 30 in this embodiment has a ring-shaped projection in the axial direction, and the connection surfaces between the bent portions 33 and the first arc-shaped portion 31 and the second arc-shaped portion 32 are both arc-shaped transition surfaces. It can be understood that the oil baffle 30 in this embodiment has a ring-shaped structure, which is stamped out using a stamping process to form the aforementioned structure with the first arc-shaped portion 31, the second arc-shaped portion 32, and the two bent portions 33.

[0047] In other words, the rotor core 10 of this utility model may be equipped with the above-mentioned balance block 20 and oil baffle 30 at one or both ends.

[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 oil baffle 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 oil baffle 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 balance block, and an oil baffle. The balance block is disposed on the end face of the rotor core. The oil baffle includes a first stepped surface, a second stepped surface, and two bent portions for connecting the first stepped surface and the second stepped surface. The first stepped surface is disposed on the end face of the rotor core on which the balance block is disposed, and the second stepped surface is disposed on the end face of the balance block away from the rotor core. The two bent portions are respectively disposed adjacent to both ends of the balance block in the circumferential direction and form a shield in the circumferential direction of the balance block. The sides of the two bent portions away from the balance block respectively form windward surfaces.

2. The rotor assembly according to claim 1, characterized in that: The oil baffle includes a first arc-shaped portion and a second arc-shaped portion. The first stepped surface is formed on the end face of the first arc-shaped portion, and the second stepped surface is formed on the end face of the second arc-shaped portion. The two bent portions are respectively used to connect the first arc-shaped portion and the second arc-shaped portion.

3. The rotor assembly according to claim 2, characterized in that: The first arc-shaped portion, the second arc-shaped portion, and the two bent portions are integrally formed structures.

4. The rotor assembly according to claim 2, characterized in that: The projection of the second arc-shaped portion in the axial direction completely covers the balance block, and the projected area of ​​the second arc-shaped portion in the axial direction is greater than or equal to the projected area of ​​the balance block in the axial direction.

5. The rotor assembly according to claim 2, characterized in that: The oil baffle plate has a ring-shaped projection in the axial direction.

6. The rotor assembly according to claim 2, characterized in that: The connection surfaces between the bent portion and the first arc-shaped portion and the second arc-shaped portion are both arc-shaped transition surfaces.

7. The rotor assembly according to claim 2, characterized in that: The first arc-shaped portion is riveted to the rotor core by rivets, and the second arc-shaped portion and the balance block are riveted to the rotor core by rivets.

8. The rotor assembly according to claim 1, characterized in that: The projections of the two bent portions onto the circumferential side of the balance block completely cover its circumferential side.

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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