Rotor assembly and compressor

Abstract

The invention provides a rotor assembly and a compressor. The rotor assembly comprises a rotor iron core and a balance block. The balance blocks are respectively arranged on two side end surfaces of the rotor iron core along the axial direction of the rotor iron core; the balance blocks cover part of the end face of the rotor core in the circumferential direction of the rotor core. The end face of the rotor iron core is provided with a plurality of refrigerant holes penetrating through the rotor iron core in the axial direction. At least on the end face of one side of the rotor iron core, the cross section area of the refrigerant hole far away from the balance block is larger than the cross section area of the refrigerant hole close to the balance block. According to the configuration, the cross section area of the refrigerant hole far away from the balance block is enlarged, so that the weight of one side, far away from the balance block, of the rotor iron core is reduced, the weight distribution of the rotor iron core is uneven, the weight of the balance block needs to be reduced, and the use effect of the rotor assembly is maintained; and the weight of the balance block is reduced, so that the cost of the balance block is reduced, and the manufacturing cost of the compressor is further reduced.

Description

Technical Field

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

[0002] The rotor in the compressor includes a balancing block, a rotor core, rivet holes, a refrigerant hole, etc. Among them, multiple refrigerant holes are distributed around the shaft hole, and the upper and lower balancing blocks are placed on both sides of the bottom of the rotor respectively. The refrigerant passes through the rotor through the refrigerant holes to exert its effect. The refrigerant absorbs, transfers and releases heat during the circulation process, enabling the system to effectively cool or heat the air, objects or environment.

[0003] Since the price of the balancing block is relatively high, in order to reduce the cost of the compressor, the use of the balancing block is usually reduced, and reducing the use of the balancing block will inevitably affect the use effect of the rotor.

[0004] Based on this, how to reduce the weight of the balancing weight without affecting the use effect of the rotor has become a technical problem that technicians in this field need to solve. Summary of the invention

[0005] The object of the present invention is to provide a rotor assembly and a compressor, so as to reduce the weight of the balancing block without affecting the use effect of the rotor.

[0006] In order to achieve the above object, the present invention provides a rotor assembly, comprising: a rotor core and a balancing block;

[0007] The balancing blocks are respectively arranged on both side end surfaces of the rotor core along its own axial direction; and the balancing blocks cover part of the end surfaces of the rotor core along the circumferential direction of the rotor core;

[0008] A plurality of coolant holes are provided on the end surface of the rotor core and penetrate the rotor core axially; at least on one end surface of the rotor core, the cross-sectional area of ​​the coolant hole arranged away from the balance block is larger than the cross-sectional area of ​​the coolant hole arranged close to the balance block.

[0009] Optionally, the coolant hole has a first end and a second end which are arranged opposite to each other along the axial direction of the rotor core, and a cross-sectional area of ​​the coolant hole at the first end is greater than a cross-sectional area of ​​the coolant hole at the second end.

[0010] Optionally, the refrigerant hole has a first diameter segment and a second diameter segment, the first diameter segment is arranged close to the first end, the second diameter segment is arranged close to the second end, and the cross-sectional area of ​​the first diameter segment is greater than the cross-sectional area of ​​the second diameter segment.

[0011] Optionally, a length of the first radial segment along the axial direction of the rotor core is less than or equal to half of the axial length of the rotor core.

[0012] Optionally, an extension direction of the coolant hole is arranged at an angle to the axial direction of the rotor core.

[0013] Optionally, the connection between the first diameter section and the second diameter section is arranged in a step shape;

[0014] or,

[0015] The diameter of the first diameter section gradually decreases from the first end to the second end.

[0016] Optionally, the opening of the coolant hole on the first end is formed by a plurality of sub-coolant holes that are arranged away from the balancing block and are interconnected.

[0017] Optionally, the balancing blocks are arranged opposite to each other on both side end surfaces of the rotor core along the radial direction of the rotor core;

[0018] On both side end surfaces of the rotor core, the cross-sectional area of ​​the coolant hole arranged away from the balancing block is larger than the cross-sectional area of ​​the coolant hole arranged close to the balancing block.

[0019] Optionally, the two coolant holes are arranged opposite to each other in the radial direction of the rotor core, and the first end and the second end are arranged opposite to each other in the radial direction of the rotor core.

[0020] Optionally, the rotor core is formed by stacking a plurality of rotor laminations.

[0021] In order to achieve the above object, the present invention also provides a compressor, comprising the rotor assembly as described above.

[0022] Compared with the existing rotor assembly, the rotor assembly and compressor provided by the present application have the following advantages:

[0023] The rotor assembly provided in the present application reduces the weight of the rotor core on the side away from the balancing block by enlarging the cross-sectional area of ​​the refrigerant hole arranged away from the balancing block, resulting in an uneven weight distribution of the rotor core, and thus requiring the weight of the balancing block to be reduced to maintain the use effect of the rotor assembly; and the reduction in the weight of the balancing block also reduces the cost of the balancing block, thereby reducing the manufacturing cost of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the arrangement of refrigerant holes in the prior art;

[0025] Figure 2 A schematic diagram of the arrangement of the first type of refrigerant holes provided in an embodiment of the present invention;

[0026] Figure 3 for Figure 2sectional view of

[0027] Figure 4 A schematic diagram of the arrangement of the second type of refrigerant holes provided in an embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the arrangement of the coolant holes on one end surface of the rotor core provided in an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the arrangement of the coolant holes on the other side end surface of the rotor core provided by an embodiment of the present invention;

[0030] Figure 7 for Figure 6 Cross-sectional view of .

[0031] The description of each reference numeral is as follows:

[0032] 10- rotor core;

[0033] 11-Balance block;

[0034] 12-refrigerant hole; 120-first end; 121-second end; 122-first diameter section; 123-second diameter section;

[0035] 13-Original refrigerant hole;

[0036] X-axial direction; Y-radial direction; Z-circumferential direction. DETAILED DESCRIPTION

[0037] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0038] As used in this specification, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal, horizontal plane direction" generally refers to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0039] The object of the present invention is to provide a rotor assembly and a compressor, so as to reduce the weight of the balancing block without affecting the use effect of the rotor.

[0040] Please refer to Figure 1 In the prior art, the original refrigerant hole 13 is arranged around the shaft hole of the rotor core 10, and the cross-sectional areas of the multiple original refrigerant holes 13 are equal. In order to ensure the use effect of the compressor rotor, the balancing block 11 needs to be sufficiently arranged on the two side end faces of the rotor core 10, which makes it impossible to reduce the weight of the balancing block 11, thereby causing the cost of the compressor to be unable to be effectively controlled. Based on this, this embodiment provides a rotor assembly and a compressor, which reduces the weight of the side of the rotor core away from the balancing block by increasing the cross-sectional area of ​​the refrigerant hole arranged away from the balancing block, so that the weight of the balancing block can be reduced, thereby reducing the manufacturing cost of the compressor.

[0041] Please refer to Figure 2 , Figures 4 to 6 The present invention provides a rotor assembly, comprising: a rotor core 10 and a balancing block 11; the balancing blocks 11 are respectively arranged on the end faces of the rotor core 10 on both sides along its own axial direction X; and the balancing blocks 11 cover part of the end face of the rotor core 10 along the circumferential direction Z of the rotor core 10; a plurality of coolant holes 12 penetrating the rotor core 10 along the axial direction X are opened on the end face of the rotor core 10; at least on one end face of the rotor core 10, the cross-sectional area of ​​the coolant hole 12 arranged away from the balancing block 11 is greater than the cross-sectional area of ​​the coolant hole 12 arranged close to the balancing block 11. It should be noted that the cross-sectional area of ​​the coolant hole 12 in the above text refers to the cross-sectional area of ​​the coolant hole 12 perpendicular to the axial direction X of the rotor core 10, and the coolant holes 12 mentioned in this article are all enlarged coolant holes 12, and the non-enlarged coolant holes 12 are referred to as original coolant holes 13. In the present embodiment, a plurality of refrigerant holes 12 are evenly arranged around the circumference Z of the rotor core 10, and each refrigerant hole 12 penetrates the rotor core 10 along the axial direction X of the rotor core 10 to form a channel for the circulation of the refrigerant. In order to reduce the cost of the balancing block 11, it is necessary to reduce the weight of the rotor core 10 on the side away from the balancing block 11. In the present embodiment, the cross-sectional area of ​​the refrigerant hole 12 arranged away from the balancing block 11 is enlarged. It can be understood by those skilled in the art that enlarging the cross-sectional area of ​​the refrigerant hole 12 means that the volume of the channel for the circulation of the refrigerant increases, which results in a reduction in the weight of the rotor core 10 on the side away from the balancing block 11. The rotor that was originally able to maintain balance by the heavy balancing block 11 will fall to the side where the refrigerant hole 12 is not enlarged due to the uneven weight distribution of the rotor core 10. At this time, it is necessary to reduce the weight of the balancing block 11 to restore the balance of the rotor core 10; the reduction in the weight of the balancing block 11 also reduces the production cost of the compressor. In the present embodiment, please refer to Figure 2 The enlarged refrigerant hole 12 only increases in size but does not change in shape compared to the original refrigerant hole 13. In some other embodiments, the enlarged refrigerant hole 12 may also have a shape different from that of the original refrigerant hole 13, as long as its cross-sectional area is greater than that of the original refrigerant hole 13.

[0042] In some optional embodiments, the enlarged coolant hole 12 may be provided only on one side end surface of the rotor core 10 (eg Figure 2 , Figure 4 As shown), at this time, the coolant hole 12 corresponding to the other side end surface of the rotor core 10 is still the size of the original coolant hole 13; the enlarged coolant hole 12 can also be set on both side end surfaces of the rotor core 10 (as shown Figures 5 and 6As shown), at this time, the enlarged refrigerant holes 12 on the two side end faces are located on different sides, and the refrigerant holes 12 on the other side end faces corresponding thereto are still the size of the original refrigerant holes 13. With such a configuration, by changing the shape of the refrigerant holes 12 and expanding the cross-sectional area of ​​the refrigerant holes 12 away from the balancing block 11, the weight of this part of the rotor core 10 is reduced; and the rotor core 10 was originally able to maintain balance during rotation through the heavy balancing block 11. Now, due to the decrease in the weight of the rotor core 10, it is necessary to reduce the weight of the balancing block 11 so that the rotor core 10 can be balanced again. Figure 2 and Figure 4 In the embodiment, the weight of the balance block 11 on one side end surface of the enlarged refrigerant hole 12 can be reduced; Figures 5 and 6 In this embodiment, the weight of the balancing blocks 11 located on both side end surfaces of the rotor core 10 can be reduced.

[0043] Please refer to Figure 3 and Figure 7 ,in, Figure 3 for Figure 2 A cross-sectional view of the end face of the rotor core 10 along the axis A, Figure 7 for Figure 6 The cross-sectional view of the end surface of the rotor core 10 along the axis B in FIG. The coolant hole 12 has a first end 120 and a second end 121 that are oppositely arranged along the axial direction X of the rotor core 10, and the cross-sectional area of ​​the coolant hole 12 at the first end 120 is larger than the cross-sectional area of ​​the coolant hole 12 at the second end 121. It should be noted that for the enlarged coolant hole 12 (please refer to Figure 3 and Figure 7 ), the cross-sectional area at the first end 120 is greater than the cross-sectional area at the second end 121, wherein the cross-sectional area at the first end 120 and the cross-sectional area at the second end 121 can be understood as the cross-sectional area of ​​the opening of the coolant hole 12 on the two end surfaces of the rotor core 10; and for the original coolant hole 13 (please refer to Figure 3 ), whose cross-sectional area at the first end 120 is equal to its cross-sectional area at the second end 121.

[0044] As an optional embodiment, the refrigerant hole 12 has a first diameter section 122 and a second diameter section 123, the first diameter section 122 is arranged near the first end 120, the second diameter section 123 is arranged near the second end 121, and the cross-sectional area of ​​the first diameter section 122 is greater than the cross-sectional area of ​​the second diameter section 123. Preferably, the length of the first diameter section 122 along the axial direction X of the rotor core 10 is less than or equal to half of the axial length X of the rotor core 10. Please continue to refer to Figure 3 and Figure 7In the refrigerant channel formed by an enlarged refrigerant hole 12, the first end 120 is provided with an enlarged refrigerant hole 12 opening, which is connected to the first diameter section 122; the second end 121 is provided with an original refrigerant hole 13 opening, which is connected to the second diameter section 123. The length of the first diameter section 122 along the axial direction X of the rotor core 10 does not exceed half of the axial length X of the rotor core 10, so as to prevent the length of the first diameter section 122 from being too long, the mass of the rotor core 10 from changing too much, and affecting the use effect of the rotor.

[0045] In an optional embodiment, the extension direction of the coolant hole 12 is set at an angle to the axial direction X of the rotor core 10. Figure 3 For example, the extension direction of the coolant hole 12 is parallel to the axial direction X of the rotor core 10. In other real-time examples, the rotor core 10 is obtained by stacking rotor punchings. Therefore, after using the progressive die stamping process, it is possible to achieve different shapes of the coolant holes 12 on different rotor punchings in the axial direction X of the rotor core 10, and it can also be achieved that the coolant through hole area of ​​punching B is larger than the coolant through hole area of ​​punching A, that is, the coolant through hole of punching A is completely contained in the coolant through hole area of ​​punching B. Based on this, the extension direction of the entire coolant hole 12 can also have an angle with the axial direction X of the rotor core 10. The specific angle can be configured according to actual conditions, and this embodiment does not limit this.

[0046] Furthermore, the connection between the first diameter section 122 and the second diameter section 123 is arranged in a step shape; or, the diameter of the first diameter section 122 gradually decreases from the first end 120 to the second end 121. Figure 3 and Figure 7 In the illustrated example, the extension directions of the first diameter section 122 and the second diameter section 123 are both arranged parallel to the axial direction X of the rotor core 10, and the connection between the first diameter section 122 and the second diameter section 123 is in a step-like shape, that is, the large-diameter refrigerant hole 12 suddenly changes into a small-diameter refrigerant hole 12 at the connection between the first diameter section 122 and the second diameter section 123. In some other embodiments, the transition from the first diameter section 122 to the second diameter section 123 may also be a gradual transition, that is, the large-diameter refrigerant hole 12 gradually decreases to the small-diameter refrigerant hole 12, and the reduction may be made at the first end 120, or may start from a certain section, and the specific transition method may be flexibly configured by those skilled in the art according to actual conditions.

[0047] Please refer to Figure 4 The opening of the coolant hole 12 at the first end 120 is formed by a plurality of sub-coolant holes 12 that are arranged away from the balancing block 11 and are connected to each other. Figure 4In the illustrated example, the number of refrigerant holes 12 is 6, of which 3 are arranged close to the balancing block 11, and the other 3 are arranged far from the balancing block 11. The enlarged refrigerant hole 12 merges the 3 refrigerant holes 12 arranged far from the balancing block 11 into one, while the original refrigerant hole 13 close to the balancing block 11 remains unchanged. In another embodiment, the enlarged refrigerant hole 12 may also be formed by merging 2 original refrigerant holes 13, or by merging other numbers of original refrigerant holes 13, and the remaining original refrigerant holes 13 arranged far from the balancing block 11 may also be formed as follows. Figure 2 As shown, an enlarged refrigerant hole 12 is formed.

[0048] Please refer to Figures 5 to 7 The balancing blocks 11 are relatively arranged on both side end surfaces of the rotor core 10 along the radial direction Y of the rotor core 10; on both side end surfaces of the rotor core 10, the cross-sectional area of ​​the refrigerant hole 12 arranged away from the balancing block 11 is larger than the cross-sectional area of ​​the refrigerant hole 12 arranged close to the balancing block 11. Furthermore, the two refrigerant holes 12 relatively arranged on the radial direction Y of the rotor core 10, the first end 120 and the second end 121 are relatively arranged along the radial direction Y of the rotor core 10. It should be noted that Figure 5 and Figure 6 For example, in Figure 5 In the embodiment, on one side end surface of the rotor core 10, the weight of the balancing block 11 is concentrated below the drawing, so the plurality of refrigerant holes 12 located above the drawing can be expanded; Figure 6 In the embodiment, on the other side end surface of the rotor core 10, the weight of the balancing block 11 is concentrated on the upper side of the drawing, so the plurality of refrigerant holes 12 located below the drawing can be expanded. Figure 7 The refrigerant channels shown are two refrigerant channels arranged relatively along the radial direction Y of the rotor core 10. Such an arrangement can reduce the weight of the balancing blocks 11 located on the two side end faces of the rotor core 10 without affecting the performance of the rotor core 10, thereby further reducing the production cost.

[0049] In another embodiment, the present invention further provides a compressor, comprising the rotor assembly as described above. With such configuration, by enlarging the cross-sectional area of ​​the refrigerant hole 12 disposed away from the balancing block 11, the weight of the rotor core 10 on the side away from the balancing block 11 is reduced, thereby being able to reduce the weight of the balancing block 11 to adapt to the change in the weight distribution of the rotor core 10, thereby reducing the cost of the balancing block 11 while ensuring the performance of the rotor core 10, thereby reducing the manufacturing cost of the compressor.

[0050] In summary, in the rotor assembly and the compressor provided in the embodiments of the present invention, the rotor assembly includes: a rotor core and a balancing block; the balancing blocks are respectively arranged on the end faces of the rotor core on both sides along its own axial direction; and the balancing blocks cover part of the end face of the rotor core along the circumferential direction of the rotor core; a plurality of refrigerant holes are provided on the end face of the rotor core and penetrate the rotor core axially; at least on one end face of the rotor core, the cross-sectional area of ​​the refrigerant hole arranged away from the balancing block is larger than the cross-sectional area of ​​the refrigerant hole arranged close to the balancing block.

[0051] Such a configuration reduces the weight of the rotor core on the side away from the balance block by expanding the cross-sectional area of ​​the refrigerant hole arranged away from the balance block, making the weight distribution of the rotor core uneven. It is necessary to reduce the weight of the balance block to maintain the use effect of the rotor assembly. The reduction in the weight of the balance block also reduces the cost of the balance block, thereby reducing the manufacturing cost of the compressor.

[0052] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A rotor assembly, characterized in that: include: Rotor core and balance weight; The balancing blocks are respectively arranged on both side end surfaces of the rotor core along its own axial direction; and the balancing blocks cover part of the end surfaces of the rotor core along the circumferential direction of the rotor core; A plurality of coolant holes are provided on the end surface of the rotor core and penetrate the rotor core axially; at least on one end surface of the rotor core, the cross-sectional area of ​​the coolant hole arranged away from the balance block is larger than the cross-sectional area of ​​the coolant hole arranged close to the balance block.

2. The rotor assembly according to claim 1, characterized in that The coolant hole has a first end and a second end that are oppositely arranged along the axial direction of the rotor core, and a cross-sectional area of ​​the coolant hole at the first end is greater than a cross-sectional area of ​​the coolant hole at the second end.

3. The rotor assembly according to claim 2, characterized in that The refrigerant hole has a first diameter section and a second diameter section, the first diameter section is arranged close to the first end, the second diameter section is arranged close to the second end, and the cross-sectional area of ​​the first diameter section is greater than the cross-sectional area of ​​the second diameter section.

4. The rotor assembly according to claim 3, characterized in that: The length of the first radial section along the axial direction of the rotor core is less than or equal to half of the axial length of the rotor core.

5. The rotor assembly according to claim 3, characterized in that: The extension direction of the coolant hole is set at an angle with the axial direction of the rotor core.

6. The rotor assembly according to claim 5, characterized in that The connection between the first diameter section and the second diameter section is arranged in a step shape; or, The diameter of the first diameter section gradually decreases from the first end to the second end.

7. The rotor assembly according to claim 2, characterized in that The opening of the coolant hole on the first end is formed by a plurality of sub-coolant holes which are arranged away from the balancing block and are interconnected.

8. The rotor assembly according to claim 2, wherein: The balancing blocks are arranged opposite to each other on both side end surfaces of the rotor core along the radial direction of the rotor core; On both side end surfaces of the rotor core, the cross-sectional area of ​​the coolant hole arranged away from the balancing block is larger than the cross-sectional area of ​​the coolant hole arranged close to the balancing block.

9. The rotor assembly according to claim 8, characterized in that The two coolant holes are arranged opposite to each other in the radial direction of the rotor core, and the first end and the second end are arranged opposite to each other in the radial direction of the rotor core.

10. The rotor assembly according to any one of claims 1 to 9, characterized in that: The rotor core is formed by stacking a plurality of rotor sheets.

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

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