Rotor assembly and compressor

Abstract

The invention provides a rotor assembly and a compressor. The rotor assembly comprises a rotor iron core, a balance block and an oil baffle plate, the oil baffle plate comprises an annular main body and a concave seat, the concave seat comprises an open end and a closed end, the open end is connected to the annular main body, the distance from the closed end to the rotor iron core is smaller than that from the open end to the rotor iron core, and the balance block is arranged between the annular main body and the rotor iron core. According to the oil baffle plate, the open-type concave seat is used for replacing a supporting column, so that processing materials are greatly saved, the limitation of the manufacturing of the supporting column on the material and the thickness of the oil baffle plate is avoided, and the weight and the processing cost of the oil baffle plate are reduced.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a rotor assembly and a compressor. Background Art

[0002] With the rapid development of air-conditioning technology, the compressor, as the core component of the air conditioner, is developing towards the trend of miniaturization and high frequency. The miniaturized and high-frequency design will cause the flow area of the motor to further decrease, and the outflow of lubricating oil from the compressor to increase, resulting in the attenuation of the operating capacity. In the prior art, generally an oil baffle is added above the motor rotor to reduce the outflow of lubricating oil from the compressor. The support column is connected to the baffle body through the end face of the support column. However, the above-mentioned baffle structure is generally cast from high manganese steel material or pressed by powder metallurgy. This process requires the thickness of the end face connecting the support column, that is, the baffle body, to be more than 2 mm, otherwise it cannot be manufactured. This increases the weight of the baffle. At the same time, the methods used to fix the baffle are all support columns, and the setting of the column body also increases the cost, and the structure is complex, occupying the space for the lubricating oil to flow back. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotor assembly and a compressor to solve the problems of the existing oil baffle being heavy, high in cost, complex in structure and occupying the lubricating oil return space.

[0004] To achieve the above purpose, the present invention provides a rotor assembly, including: a rotor core, a balance weight and an oil baffle;

[0005] The oil baffle includes an annular main body and a concave seat. The concave seat includes an open end and a closed end. The open end is connected to the annular main body. The distance from the closed end to the rotor core is less than the distance from the open end to the rotor core. The balance weight is arranged between the annular main body and the rotor core.

[0006] Optionally, a flange is connected to the central hole of the annular main body, and the flange extends towards the central through hole of the rotor core.

[0007] Optionally, the flange is frustum-shaped.

[0008] Optionally, the rotor assembly further includes a rivet. The annular main body is connected to the rotor core through the rivet. Among them, the part of the annular main body matching the balance weight sinks a certain distance relative to the other parts of the annular main body, and the end face after the rivet is inserted does not exceed the highest point of the annular main body.

[0009] Optionally, the annular main body includes: a stainless steel plate, an aluminum alloy plate or a cold-rolled steel plate.

[0010] Optionally, the thickness of the annular main body is 0.35 mm to 2 mm.

[0011] Optionally, the distance between the open end and the closed end is L1, and the thickness of the balance weight is H, where 0.2H ≤ L1 ≤ 2H is satisfied.

[0012] Optionally, a plurality of the recesses are provided on the oil baffle, and the plurality of recesses are arranged at intervals in the circumferential direction of the annular body.

[0013] Optionally, the number N of the recesses satisfies 1 ≤ N ≤ 4.

[0014] To achieve the above object, the present invention further provides a compressor, including the rotor assembly as described above.

[0015] In summary, in the rotor assembly and the compressor provided by the present invention, the rotor assembly includes: a rotor core, a balance weight, and an oil baffle; the oil baffle includes an annular body and a recess, the recess includes an open end and a closed end, the open end is connected to the annular body, and the distance from the closed end to the rotor core is less than the distance from the open end to the rotor core, and the balance weight is disposed between the annular body and the rotor core.

[0016] Compared with the existing oil baffle design, the rotor assembly provided by the present invention has a recess provided on the oil baffle, and the recess has an open end and a closed end. The open end is connected to the annular body, and the closed end is closer to the rotor core than the open end. The setting of the recess leaves a cavity between the oil baffle and the rotor core for accommodating the balance weight. Compared with the existing oil baffle, the present invention replaces the support column with an open-type recess, greatly saving the processing material, and avoiding the limitations on the material and thickness of the oil baffle for the manufacture of the support column and maintaining the rigidity of the support column, reducing the weight and processing cost of the oil baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an oil baffle in the prior art;

[0018] Figure 2 is a schematic structural diagram of a rotor assembly provided by an embodiment of the present invention;

[0019] Figure 3 is an exploded view of the structure of a rotor assembly provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic structural diagram of an oil baffle provided by an embodiment of the present invention;

[0021] Figure 5 is a schematic structural diagram of a first balance weight provided by an embodiment of the present invention;

[0022] Figure 6Schematic diagram of the structure of the second balance weight provided by an embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the first end plate or the second end plate provided by an embodiment of the present invention;

[0024] Among them, the descriptions of the respective reference numerals are as follows:

[0025] 10 - oil baffle; 101 - annular main body; 102 - recess; 103 - flange; 1021 - open end; 1022 - closed end; 1023 - side wall;

[0026] 11 - first end plate; 12 - first balance weight; 13 - rotor core; 14 - second end plate; 15 - second balance weight; 16 - rivet; 17 - through hole; 18 - through hole; 19 - support column;

[0027] X - axial direction of the rotor core; Y - radial direction of the rotor core. Detailed implementation manners

[0028] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in very simplified forms and are not drawn to scale, only for the purpose of facilitating and clearly assisting in explaining the objectives of the embodiments of the present invention. In addition, the structures shown in the accompanying drawings are often a part of the actual structures. In particular, the emphases to be shown in the respective drawings are different, and sometimes different scales are used.

[0029] As used in this specification, the singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in the sense of including "and / or", the term "several" is generally used in the sense of including "at least one", the term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. "One end" and "the other end", as well as "proximal end" and "distal end" generally refer to two corresponding parts, which include not only the endpoints. The terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. In addition, as used in this specification, one component being disposed on another component generally only indicates a connection, coupling, cooperation or transmission relationship between the two components, and the two components may be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate component, and should not be construed as indicating or implying the spatial position relationship between the two components, that is, one component may be inside, outside, above, below or on one side of the other component, etc. in any orientation, unless otherwise explicitly specified in the content. The terms "upper", "lower", "top", "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction along the gravity direction, which is generally perpendicular to the ground, and the "horizontal, horizontal plane direction" is generally along the direction parallel to the ground; for those of ordinary skill in the art, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0030] The object of the present invention is to provide a rotor assembly and a compressor to solve the problems of the existing oil baffle being heavy, costly, structurally complex and occupying the lubricating oil return space.

[0031] Please refer to Figures 2 to 7, the present invention provides a rotor assembly, comprising: a rotor core 13, balance weights, and an oil baffle 10; the oil baffle 10 includes an annular body 101 and a recess 102, the recess 102 includes an open end 1021 and a closed end 1022, the open end 1021 is connected to the annular body 101, and the distance from the closed end 1022 to the rotor core 13 is less than the distance from the open end 1021 to the rotor core 13, and the balance weights are arranged between the annular body 101 and the rotor core 13. Those skilled in the art can understand that the rotor assembly should at least include two balance weights and two end plates. In this embodiment, the two balance weights are respectively set as a first balance weight 12 and a second balance weight 15, and the two end plates are respectively set as a first end plate 11 and a second end plate 14. Among them, the first balance weight 12 and the first end plate 11 are arranged at one end of the rotor core 13 close to the oil baffle 10, and the first end plate 11 is arranged between the first balance weight 12 and the rotor core 13, and the first balance weight 12 is arranged between the annular body 101 and the rotor core 13; the second balance weight 15 and the second end plate 14 are arranged at one end of the rotor core 13 far from the oil baffle 10, and the second end plate 14 is arranged between the second balance weight 15 and the rotor core 13. It should be noted that, in Figures 2 to 4 the exemplary embodiment shown, the oil baffle 10 is an annular member, the oil baffle 10 has an annular body 101 and a recess 102, the recess 102 includes an open end 1021, a closed end 1022, and side walls 1023. The closed end 1022 is a bottom plate, and both ends thereof are respectively connected to a side wall 1023. The other ends of the side walls 1023 are respectively connected to the annular body 101. The middle part of the ends of the two side walls 1023 connected to the annular body 101 is the open end 1021. In this embodiment, the side walls 1023 are perpendicular to the bottom plate and are planes. Specifically, the recess 102 is U-shaped. In other embodiments, the side walls 1023 can also be arranged at other angles with the bottom plate and can also be arc surfaces; at the same time, the closed end 1022 can be pressed and fixed on the first end plate 11 or there can be a certain distance between the closed end 1022 and the first end plate 11. Through holes 18 are respectively provided in the middle of the oil baffle 10, the first end plate 11, and the rotor core 13 for a crankshaft (not shown in the figure) to pass through. As an optional embodiment, the annular body 101 and the recess 102 are of an integral structure; at the same time, the oil baffle 10 is arranged parallel to the first end plate 11; in addition, in Figures 5 to 7In the illustrated exemplary embodiment, the first end plate 11 is an annular member, and the outer wall of the first balance weight 12 is adapted to the arc of the oil baffle 10, the first end plate 11, and the side wall of the rotor core 13, so that the first balance weight 12 will not be exposed outside the rotor assembly after assembly. At the same time, the arcs of the side walls of the oil baffle 10, the first end plate 11, and the rotor core 13 are adapted to each other, improving the stability of the rotor core 13 during rotation. In some other embodiments, the first end plate 11, the first balance weight 12, and the oil baffle 10 may also be members of other shapes, and this embodiment does not limit this.

[0032] With such a configuration, by providing a recess 102 on the oil baffle 10, and the recess 102 has an open end 1021 and a closed end 1022. The open end 1021 is connected to the annular body 101, and the closed end 1022 is closer to the rotor core 13 than the open end 1021. The provision of the recess 102 ensures that there is a cavity between the oil baffle 10 and the rotor core 13, and this cavity is used for placing the first balance weight 12. Compared with the design of the oil baffle 10 in the prior art, replacing the support column 19 with the open-type recess 102 greatly saves the processing material, and avoids the process limitation of the existing material that requires the thickness of the oil baffle 10 to be greater than 2 mm, reducing the overall production cost.

[0033] As an alternative embodiment, please refer to Figures 2 to 4 , a flange 103 is connected to the central hole of the annular body 101, and the flange 103 extends towards the central through hole of the rotor core 13. Those skilled in the art can understand that the flange 103 can abut against a part of the inner wall of the first balance weight 12 to prevent the first balance weight 12 from moving radially along the rotor core during the rotation of the rotor core 13, thereby affecting the stability of the rotor assembly during rotation; at the same time, the flange 103 can also extend into the central through hole of the rotor core 13 to realize the connection between the oil baffle 10 and the rotor core 13, further improving the stability of the rotor assembly during rotation. Further, the flange 103 is frustum-shaped. With such a configuration, the side wall of the flange 103 is an arc surface, which can fit better with the inner wall of the first balance weight 12. Of course, in some other embodiments, the flange 103 may also be a cylindrical member or an irregular-shaped member with an arc-shaped side wall, and those skilled in the art can configure it according to the actual situation; the central hole of the above-mentioned annular body 101 and the central through hole of the rotor core 13 are the through holes 18 mentioned above.

[0034] In an alternative embodiment, please continue to refer to Figures 2 to 4, the rotor assembly further includes a rivet 16. The annular body 101 is connected to the rotor core 13 through the rivet 16. Among them, the part of the annular body 101 that matches the balance weight sinks a certain distance relative to other parts of the annular body 101, and the end face after the rivet 16 is inserted does not exceed the highest point of the annular body 101. It should be noted that in Figure 2 and Figure 3 In the illustrated exemplary embodiment, the part of the annular body 101 that matches the first balance weight 12 is not on the same plane as other parts of the annular body 101. It is closer to the rotor core 13 than other parts of the annular body 101, and the connection part between the two is provided in a stepped shape. The sinking distance can be flexibly configured according to the height of the recess 102 (i.e., the distance between the open end 1021 and the closed end 1022); at the same time, for the rivet 16 located in the part of the annular body 101 that matches the first balance weight 12, the end face after insertion does not exceed the plane where other parts of the annular body 101 are located. In some other embodiments, the part of the annular body 101 that matches the first balance weight 12 can also be arranged away from the rotor core 13. The part of the annular body 101 that matches the first balance weight 12 can also be on the same plane as other parts of the annular body 101. The connection part between the two can also adopt a fillet structure or a gradual change structure for transition. Among them, the gradual change structure can be an inclined plane or an arc surface; the end face after the rivet 16 is inserted can also protrude from the plane where the annular body 101 is located, and this embodiment is not limited thereto.

[0035] In an alternative embodiment, the annular body 101 includes: a stainless steel plate, an aluminum alloy plate or a cold-rolled steel plate. Further, the thickness of the annular body 101 is 0.35 mm to 2 mm. It should be noted that in the prior art, the material of the oil baffle 10 is high manganese steel or powder metallurgy. Due to the limitation of the mechanical characteristics of the material, the thickness is required to be more than 2 mm; while in this embodiment, the annular body 101 is made of one or more of a stainless steel plate, an aluminum alloy plate or a steel plate. Since the mechanical properties of the material are improved, the thickness of the annular body 101 can be appropriately reduced, thereby reducing the weight of the overall structure and further reducing the production cost of the oil baffle 10.

[0036] As an alternative embodiment, there is a first distance L1 between the open end 1021 and the closed end 1022. The first distance L1 and the thickness H of the balance weight satisfy the following relationship: 0.2H ≤ L1 ≤ 2H. It should be noted that the thickness H of the first balance weight 12 is in Figure 2Here, \(L_1\) is the length of the first balance block 12 along the axial direction \(X\) of the rotor core; when \(0.2H \leq L_1 \lt H\), the first balance block 12 is arranged at the part of the annular main body 101 that matches the balance block, and the recess 102 is arranged at other parts of the annular main body 101. At this time, there is a certain distance between the closed end 1022 of the recess 102 and the end plate, increasing the contact area of the oil baffle and enhancing the oil blocking effect; when \(H \leq L_1 \leq 2H\), the first balance block 12 is arranged at the part of the annular main body 101 that matches the balance block, and the recess 102 is arranged at other parts of the annular main body 101. At this time, the closed end 1022 of the recess 102 is pressed and fixed with the end plate, and the part of the annular main body 101 that matches the balance block can sink a certain distance to limit the displacement of the first balance block 12 along the axial direction \(X\) of the rotor core during the rotation of the rotor core 13. In Figure 2 In the illustrated exemplary embodiment, the distance between the open end 1021 and the closed end 1022 of the two recesses 102 is the same, and the closed end 1022 is arranged parallel to the annular main body 101. In some other embodiments, the distance between the open end 1021 and the closed end 1022 of the two recesses 102 can also be different. At this time, the closed end 1022 can be arranged at an angle with the annular main body 101, and at this time, \(L_1\) can be the maximum distance or the minimum distance between the open end 1021 and the closed end 1022.

[0037] Furthermore, the minimum distance between the side walls 1023 of the recess 102 and the maximum diameter of the rivet 16 satisfy the following relationship: \(1.05D \leq L_2 \leq 2.5D\); where: \(L_2\) is the minimum distance between the side walls 1023 of the recess 102; \(D\) is the maximum diameter of the rivet 16. With such a configuration, the minimum distance between the side walls 1023 of the recess 102 needs to be greater than the maximum diameter of the rivet 16 to ensure that the rivet 16 can pass through the recess 102 and reach the through hole 17 on the bottom surface of the recess 102, thereby realizing the connection between the components; at the same time, if the distance between the side walls 1023 of the recess 102 is too large, it will affect the strength of the oil baffle 10, and further affect the connection stability between the oil baffle 10, the first balance block 12, and the rotor core 13. Therefore, the maximum distance between the side walls 1023 of the recess 102 should be controlled within 2.5 times the maximum diameter of the rivet 16. It should be noted that in Figure 2 In the illustrated embodiment, the side walls 1023 of the recess 102 are perpendicular to the first end plate 11. Therefore, the distance between the side walls 1023 of the recess 102 is equal everywhere. If the side walls 1023 of the recess 102 are arranged at other angles with the first end plate 11, then \(L_2\) should be the minimum distance between the side walls 1023 of the recess 102.

[0038] Please refer to Figure 3 and Figures 6 to 7, the rotor assembly further includes a second balance weight 15 and a second end plate 14. The second end plate 14 abuts against one end of the rotor core 13 away from the first end plate 11. The second balance weight 15 abuts against the second end plate 14, and the second balance weight 15 and the first balance weight 12 are oppositely arranged in the radial direction Y of the rotor core. Through holes 17 adapted to the diameter of the rivets 16 are also provided on the second end plate 14 and the second balance weight 15 for the rivets 16 to pass through. It should be noted that the second end plate 14 is an annular member and is the same member as the first end plate 11. The outer wall of the second balance weight 15 is adapted to the arc of the second end plate 14 and the side wall of the rotor core 13. The second balance weight 15 and the first balance weight 12 are oppositely arranged along the radial direction Y of the rotor core, that is, the first balance weight 12 is arranged in the cavity formed by the connecting section 101 of the oil baffle 10 and the first end plate 11, and the second balance weight 15 is arranged on the part of the second end plate 14 corresponding to the abutting section 102 of the oil baffle 10. At the same time, through holes 17 are also provided on the second balance weight 15 and the second end plate 14 to realize the connection with the rotor core 13 through the rivets 16.

[0039] In an alternative embodiment, please refer to Figure 3 , there are four rivets 16 for connecting each component, and four through holes 17 are correspondingly provided on each component. Each rivet 16 passes through a through hole 17 in a one-to-one correspondence. Specifically, two of the through holes 17 located on the annular body, the first balance weight 12, the first end plate 11, the rotor core 13, and the second end plate 14 coincide in the axial direction X of the rotor core to form two first through cavities (not shown in the figure). Two rivets 16 pass through the two first through cavities in a one-to-one correspondence to achieve the connection. The other two through holes 17 located on the bottom surface of the recess 102, the first end plate 11, the rotor core 13, the second end plate 14, and the second balance weight 15 coincide in the axial direction X of the rotor core to form two second through cavities. The other two rivets 16 pass through the two first through cavities in a one-to-one correspondence to achieve the connection. In other embodiments, the number of the rivets 16 and the through holes 17 can also be reasonably configured according to the actual situation, and this embodiment is not limited thereto.

[0040] In an alternative exemplary embodiment, a plurality of recesses 102 are provided on the oil baffle 10, and the plurality of recesses 102 are arranged at intervals along the circumferential direction of the annular body 101. Further, the number N of the recesses 102 satisfies 1 ≤ N ≤ 4. In Figures 2 to 4In the illustrated embodiment, 2 recesses 102 are provided on the oil baffle 10. In some other embodiments, 1, 3 or 4 recesses 102 may also be provided on the oil baffle 10. However, it should be noted that 3 or 4 recesses 102 need to be provided on one side of the oil baffle 10 (i.e., other parts of the annular main body 101 in the foregoing text), so that the first balance weight 12 can be installed in the cavity between the other side of the oil baffle 10 (i.e., the part of the annular main body 101 that matches the balance weight in the foregoing text) and the first end plate 11.

[0041] In another embodiment, the present invention further provides a compressor, including the rotor assembly as above. With such a configuration, by providing the recess 102 on the oil baffle 10, and the recess 102 has an open end 1021 and a closed end 1022, the open end 1021 is connected to the annular main body 101, and the closed end 1022 is closer to the rotor core 13 than the open end 1021. The provision of the recess 102 ensures that there is a cavity between the oil baffle 10 and the rotor core 13, and this cavity is used for placing the first balance weight 12, so that the first balance weight 12 is separately arranged from the oil baffle 10, reducing the processing difficulty of the oil baffle 10, thereby reducing the weight of the oil baffle 10. At the same time, compared with the design of the oil baffle 10 in the prior art, the setting of the support column 19 is omitted, which also reduces the processing difficulty and defective rate of the first balance weight 12, reduces the overall production cost, and further reduces the weight and production cost of the compressor.

[0042] In summary, in the rotor assembly and the compressor provided in the embodiments of the present invention, the rotor assembly includes: a rotor core, a balance weight, and an oil baffle; the oil baffle includes an annular main body and a recess, the recess includes an open end and a closed end, the open end is connected to the annular main body, and the distance from the closed end to the rotor core is less than the distance from the open end to the rotor core, and the balance weight is arranged between the annular main body and the rotor core.

[0043] With such a configuration, compared with the existing oil baffle design scheme, the rotor assembly provided by the present invention, by providing a recess on the oil baffle, and the recess has an open end and a closed end, the open end is connected to the annular main body, and the closed end is closer to the rotor core than the open end. The provision of the recess makes a cavity left between the oil baffle and the rotor core for accommodating the balance weight. Compared with the existing oil baffle, the present invention replaces the support column with an open-type recess, greatly saving the processing materials, and avoiding the limitation of the material and thickness of the oil baffle for the support of the support column and maintaining the rigidity of the support column, reducing the weight and processing cost of the oil baffle.

[0044] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art of the present invention according to the above disclosure shall fall within the protection scope of the claims.

Claims

1. A rotor assembly, It is characterized in that include: Rotor core, balance block and oil baffle; The oil baffle includes an annular body and a recess, the recess includes an open end and a closed end, the open end is connected to the annular body, the distance from the closed end to the rotor core is smaller than the distance from the open end to the rotor core, and the balancing block is arranged between the annular body and the rotor core.

2. The rotor assembly according to claim 1, It is characterized in that The central hole of the annular body is connected with a flange, and the flange extends toward the central through hole of the rotor core.

3. The rotor assembly according to claim 2, It is characterized in that The flange is in a truncated cone shape.

4. The rotor assembly according to claim 1, It is characterized in that The rotor assembly also includes a rivet, and the annular body is connected to the rotor core through the rivet. The part of the annular body that matches the balance block is sunken a certain distance relative to other parts of the annular body, and the end face of the rivet after insertion does not exceed the highest point of the annular body.

5. The rotor assembly according to claim 1, It is characterized in that The annular body comprises: a stainless steel plate, an aluminum alloy plate or a cold-rolled steel plate.

6. The rotor assembly according to claim 1, It is characterized in that The thickness of the annular body is 0.35 mm to 2 mm.

7. The rotor assembly according to claim 1, It is characterized in that The distance between the open end and the closed end is L1, and the thickness of the balancing block is H, then 0.2H≤L1≤2H is satisfied.

8. The rotor assembly according to claim 1, It is characterized in that The oil baffle plate is provided with a plurality of recesses, which are arranged at intervals along the circumference of the annular body.

9. The rotor assembly according to claim 8, It is characterized in that The number N of the recesses satisfies 1≤N≤4.

10. A compressor, It is characterized in that The invention comprises a rotor assembly as claimed in any one of claims 1 to 9.

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