Balanced structure, rotor assembly and compressor

Abstract

This invention provides a balancing structure, a rotor assembly, and a compressor. The balancing structure includes multiple balancing laminations stacked along the axial direction of the rotor. The balancing structure has a first end and a second end disposed opposite to each other, with the first end located between the rotor and the second end. Along the extension direction from the first end to the second end, the cross-sectional area of ​​the multiple balancing laminations gradually decreases, giving the balancing structure a gradually changing shape. The technical solution provided by this invention solves the technical problem of high resistance experienced by existing balancing structures during operation.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to a balancing structure, a rotor assembly, and a compressor. Background Technology

[0002] Currently, in existing technology, to ensure the balanced operation of the compressor, a balance block structure is usually installed at the end of its rotor. The compressor's balancing structure provides balance to the compressor during high-speed operation, and its front end face agitates the refrigerant to rotate.

[0003] However, in existing technologies, the balance block structure is generally eccentrically positioned at the end of the rotor, which creates an irregular protrusion at the rotor end. When the balance block is running at high speed, its irregular structure results in greater air resistance at the balance block, leading to increased compressor power consumption. Summary of the Invention

[0004] The main objective of this invention is to provide a balancing structure, a rotor assembly, and a compressor to solve the technical problem that the balancing structure in the prior art experiences large resistance during operation.

[0005] To achieve the above objectives, according to one aspect of the present invention, a balancing structure is provided, the balancing structure being installed at the end of a rotor, the balancing structure comprising:

[0006] The balancing laminations are multiple, and the multiple balancing laminations are stacked along the axial direction of the rotor. The balancing structure has a first end and a second end that are arranged opposite to each other, with the first end located between the rotor and the second end.

[0007] In this process, along the extension direction from the first end to the second end, the cross-sectional area of ​​the multiple balancing laminations gradually decreases, so that the balancing structure has a gradually changing shape.

[0008] Furthermore, the balancing stack is an arc-shaped plate structure, which has a first stacking surface and a second stacking surface arranged opposite to each other. There is a first connecting end face between one end of the first stacking surface and one end of the second stacking surface, and there is a second connecting end face between the other end of the first stacking surface and the other end of the second stacking surface.

[0009] The first connecting end face has a smooth transition surface structure, so that one end of the first stacked surface smoothly transitions to one end of the second stacked surface through the first connecting end face; and / or

[0010] The second connecting end face is a smooth transition surface structure, so that the other end of the first stacked surface smoothly transitions to the other end of the second stacked surface through the second connecting end face.

[0011] Furthermore, the first connecting end face has a first arcuate surface structure; and / or,

[0012] The second connecting end face is a second arc surface structure.

[0013] Furthermore, the first connecting end face is a first inclined transition surface; and / or,

[0014] The second connecting end face is the second inclined transition surface.

[0015] Furthermore, one end of the first stacked surface is a first arc-shaped end; and / or,

[0016] One end of the second stacked surface is a second arc-shaped end; and / or,

[0017] The other end of the first stacked surface is the third arc-shaped end; and / or,

[0018] The other end of the second stacked surface is the fourth arc-shaped end.

[0019] Furthermore, the first arc-shaped end is tangential to the first connecting end face; and / or,

[0020] The second arc-shaped end is tangent to the first connecting end face.

[0021] Furthermore, the balancing plate has an arc-shaped structure, and the arc length of the multiple balancing plates gradually decreases along the extension direction from the first end to the second end.

[0022] Furthermore, the balancing plate is an arc-shaped plate structure, the height of the balancing plate is H, the diameter of the circle corresponding to the balancing plate is F, and the central angle of the circle corresponding to the balancing plate is α;

[0023] Among them, απF / (360H)≥0.5773.

[0024] Furthermore, the plurality of balancing sheets include a first balancing sheet and a second balancing sheet arranged adjacent to each other, wherein the top surface of the first balancing sheet is attached to the bottom surface of the second balancing sheet, and the top surface of the first balancing sheet and the bottom surface of the second balancing sheet are overlapped.

[0025] Furthermore, the balanced stack has a first stacking surface and a second stacking surface disposed opposite to each other. A first positioning structure is disposed on the first stacking surface, and a second positioning structure that cooperates with the first positioning structure is disposed on the second stacking surface; and / or,

[0026] The balancing structure is made of a non-magnetic material.

[0027] According to another aspect of the present invention, a rotor assembly is provided, including a rotor and the aforementioned balancing structure, the balancing structure being disposed on one side of the rotor.

[0028] According to another aspect of the present invention, a compressor is provided, comprising the rotor assembly provided above.

[0029] By employing the technical solution of this invention, a balancing structure is formed by stacking multiple balancing plates, and the cross-sectional area of ​​the balancing structure gradually decreases as the height increases. This gradual shape can effectively reduce the wind resistance of the balancing structure, thereby effectively reducing the resistance encountered by the balancing structure during operation, and thus reducing the power consumption of the compressor and improving the energy efficiency of the compressor. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0031] Figure 1 A schematic diagram of the balance structure provided according to Embodiment 1 of the present invention is shown;

[0032] Figure 2 A schematic diagram of the structure of the balanced stack provided according to Embodiment 1 of the present invention is shown;

[0033] Figure 3 A top view of the balancing structure provided according to Embodiment 1 of the present invention is shown;

[0034] Figure 4 It shows Figure 3 Schematic diagram of the cross-sectional structure at point BB;

[0035] Figure 5 A schematic diagram of a balanced structure with a beveled transition structure provided according to Embodiment 1 of the present invention is shown.

[0036] Figure 6 A schematic diagram of a balanced structure with an approximate oblique transition structure provided according to Embodiment 1 of the present invention is shown.

[0037] Figure 7 An assembly schematic diagram of the balanced laminations provided according to Embodiment 1 of the present invention is shown;

[0038] Figure 8 A schematic diagram of the assembly of the balanced stack is shown from another perspective according to Embodiment 1 of the present invention;

[0039] Figure 9 A schematic diagram of the balancing structure and rotor provided in Embodiment 1 of the present invention is shown;

[0040] Figure 10 This diagram shows a schematic diagram of the balancing structure and rotor assembly provided in Embodiment 1 of the present invention.

[0041] Figure 11A side view of the balancing structure and rotor assembly provided according to Embodiment 1 of the present invention is shown;

[0042] Figure 12 An enlarged schematic diagram of the positioning structure provided according to Embodiment 1 of the present invention is shown.

[0043] The above figures include the following reference numerals:

[0044] 10. Balanced stack; 11. First stacking surface; 12. Second stacking surface; 13. First connecting end face; 14. Second connecting end face; 15. First arc-shaped end; 16. Second arc-shaped end; 17. Third arc-shaped end; 18. Fourth arc-shaped end; 191. First positioning structure; 192. Second positioning structure;

[0045] 20. Rotor. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Please refer to Figures 1 to 12 In one embodiment of the present invention, a balancing structure is provided. The balancing structure is installed at the end of a rotor 20 and includes balancing laminations 10. Multiple balancing laminations 10 are stacked along the axial direction of the rotor 20. The balancing structure has a first end and a second end disposed opposite to each other, with the first end located between the rotor 20 and the second end. The cross-sectional area of ​​the multiple balancing laminations 10 gradually decreases along the extension direction from the first end to the second end, so that the balancing structure has a gradient shape.

[0048] This configuration allows for the formation of a balanced structure with a gradually changing streamlined shape through the stacking of multiple balancing vanes 10. This enables the refrigerant to pass through more smoothly, reduces the occurrence of vortex zones, and effectively reduces the pressure of the refrigerant on the balanced structure, thereby improving the compressor's energy efficiency.

[0049] It should be noted that "the balancing structure has a gradually changing shape" means that the shape of the balancing structure changes gradually, similar to a streamlined shape, rather than a structure with large abrupt changes, so as to minimize the wind resistance encountered by the balancing structure during movement.

[0050] In this embodiment, the balanced stack 10 is an arc-shaped plate structure with a first stacking surface 11 and a second stacking surface 12 arranged opposite to each other. A first connecting end surface 13 is provided between one end of the first stacking surface 11 and one end of the second stacking surface 12, and a second connecting end surface 14 is provided between the other end of the first stacking surface 11 and the other end of the second stacking surface 12.

[0051] The first connecting end face 13 can be a smooth transition surface structure, allowing one end of the first stacked surface 11 to smoothly transition to one end of the second stacked surface 12 through the first connecting end face 13; alternatively, the second connecting end face 14 can also be a smooth transition surface structure, allowing the other end of the first stacked surface 11 to smoothly transition to the other end of the second stacked surface 12 through the second connecting end face 14; or alternatively, both the first connecting end face 13 and the second connecting end face 14 can be smooth transition surface structures, and both can smoothly transition to each other. This arrangement can reduce the air resistance at the connection between each end face and the stacked surface, thereby further reducing the refrigerant resistance experienced by the balance structure and further improving the energy efficiency of the compressor.

[0052] Specifically, the first connecting end face 13 can be a first arc-shaped structure; or, the second connecting end face 14 can also be a second arc-shaped structure; or, the first arc-shaped structure and the second arc-shaped structure can be provided simultaneously. Such a structure allows the refrigerant to pass through the connecting end face more smoothly, avoids excessive cutting of the refrigerant by the straight structure, and the arc-shaped structure can also form a certain guiding effect on the refrigerant, further reducing the refrigerant resistance experienced by the balance structure.

[0053] Specifically, the first connecting end face 13 can be a first inclined transition surface; or, the second connecting end face 14 can also be a second inclined transition surface; or, both the first connecting end face 13 and the second connecting end face 14 can be inclined transition surfaces. This arrangement minimizes the wind resistance at the connection point of any two balanced laminates 10.

[0054] In this embodiment, one end of the first stacking surface 11 is a first arc-shaped end 15; or, one end of the second stacking surface 12 is a second arc-shaped end 16; or, the other end of the first stacking surface 11 is a third arc-shaped end 17; or, the other end of the second stacking surface 12 is a fourth arc-shaped end 18; or, the first stacking surface 11 is provided with both the first arc-shaped end 15 and the third arc-shaped end 17, and the second stacking surface 12 is provided with both the second arc-shaped end 16 and the fourth arc-shaped end 18. This arrangement can reduce the wind resistance of the connection between the first stacking surface 11 and the second stacking surface 12, further reducing the wind resistance experienced by the balancing structure.

[0055] Specifically, the first arc-shaped end 15 can be tangent to the first connecting end face 13; or, the second arc-shaped end 16 can be tangent to the first connecting end face 13; or, the first arc-shaped end 15 and the second arc-shaped end 16 can be tangent to both ends of the first connecting end face 13 simultaneously. Such an arrangement can further reduce the wind resistance at the end face of the balancing structure, thereby further reducing the wind resistance experienced by the balancing structure.

[0056] In this embodiment, the balancing plate 10 is an arc-shaped plate structure, and the arc length of the multiple balancing plates 10 gradually decreases along the extension direction from the first end to the second end. This arrangement facilitates the formation of a streamlined balancing structure, thereby enabling the balancing structure to better guide airflow and reduce the resistance of the refrigerant at the balancing structure.

[0057] In this embodiment, the balancing plate 10 is an arc-shaped plate structure with a height of H, a diameter of F corresponding to the circle of the balancing plate 10, and a central angle α. Wherein, απF / (360H)≥0.5773. This structural arrangement minimizes the agitation effect of the balancing structure on the refrigerant, thereby reducing the refrigerant resistance experienced by the balancing structure.

[0058] Specifically, the plurality of balancing sheets 10 include a first balancing sheet and a second balancing sheet arranged adjacent to each other. The mating top surface of the first balancing sheet and the mating bottom surface of the second balancing sheet are mated together, and the mating top surface of the first balancing sheet and the mating bottom surface of the second balancing sheet are coincident. This arrangement facilitates the cooperation between the first balancing sheet and the second balancing sheet, so as to ensure a smooth transition between two adjacent balancing sheets.

[0059] In this embodiment, the balancing stack 10 has a first stacking surface 11 and a second stacking surface 12 disposed opposite to each other. A first positioning structure 191 is disposed on the first stacking surface 11, and a second positioning structure 192 that cooperates with the first positioning structure 191 is disposed on the second stacking surface 12. This arrangement facilitates the cooperation between the first stacking surface 11 and the second stacking surface 12, and enables the assembly of the first and second balancing stacks without the need for other positioning structures.

[0060] The balancing structure can be made of non-magnetic material, which can avoid affecting the internal magnetic structure of the rotor and the operation of the rotor, thereby enhancing the reliability of the compressor.

[0061] In this embodiment, the balancing structure is formed by stacking single balancing plates. Each single plate of the balancing structure (i.e., the balancing plate 10) is provided with a fastening point. The protruding part of the fastening point is the first positioning structure 191, and the recessed part of the fastening point is the second positioning structure 192. Every two single plates are connected and fixed by fastening points. Furthermore, the front and rear faces of the balancing structure are streamlined. By designing the front or rear face of the balancing structure, or both the front and rear faces, as streamlined structures, the resistance of the front face of the balancing structure and the generation of eddies on the rear face can be significantly reduced, thereby greatly reducing the various side effects brought about by the balancing structure.

[0062] In this embodiment, the streamlined shape of the balancing structure refers to a smooth or near-smooth transition on the front or rear face of the balancing structure. As shown in the figure, a streamlined balancing structure is formed by a smooth or near-smooth transition between a curve on the upper face and a curve on the lower face. Furthermore, the curve span angle on the lower face is larger than that on the upper face. That is, angle D in the figure is greater than angle A (unit: °).

[0063] In this embodiment, the curve span angle (i.e., the central angle corresponding to the balancing lamination is α) is defined as: the maximum value of the angle between the line connecting all points on the curve where the transition surface intersects the lower end surface and the center of the balancing structure, and the centerline of the balancing structure. Similarly, the curve span angle of the upper end surface of the balancing structure is also defined as follows.

[0064] Compared with the original straight plane, the smooth transition end face provided in this embodiment can play a good guiding role for the refrigerant in the compressor, thereby greatly reducing the original side effects.

[0065] In this embodiment, the height of the transition surface of the balancing structure is H, the diameter of the geometric centerline is F, and the span angle satisfies:

[0066] απF / (360H)≥0.5773.

[0067] Where α is the angular span of the transition on the circumference, α / 360 approximately represents the proportion of the span to the entire circumference, πF represents the circumference of the geometric center line, and cot60°≈0.5773.

[0068] When απF / (360H)≥0.5773 is satisfied, the angle between the connecting end face and the upper and lower planes of the balancing structure (i.e., the first stacking surface 11 and the second stacking surface 12) is approximately no greater than 60°. If the connecting end face is too perpendicular, the front end face (first connecting end face 13) and the rear end face (second connecting end face 14) of the balancing structure will still cause significant agitation of the refrigerant, and their effect will be insignificant.

[0069] The geometric center line mentioned above is defined as a circle centered on the center of the equilibrium structure, which divides the equilibrium structure into two parts with equal mass.

[0070] In this embodiment, the balancing laminations 10 are formed by stacking laminations of different widths; and the width of the balancing laminations 10 closer to the rotor 20 is greater than the width of the balancing laminations 10 farther from the rotor 20. Taking any two laminations, the width of the lamination closer to the rotor 20 is M, and the width of the lamination farther from the rotor 20 is N, requiring M < N. The balancing laminations 10 are formed by stacking single laminations, and different spans are set for each lamination, resulting in a streamlined end face after stacking.

[0071] In this embodiment, the balance lamination 10 adopts a slanted transition structure, and in two adjacent balance laminations 10, the upper curve of the balance lamination 10 closer to the rotor coincides with the lower curve of the balance lamination 10 farther from the rotor.

[0072] Among them, such as Figure 6 As shown, in order to reduce manufacturing difficulty and processing costs, the balanced stack 10 can also adopt an approximately oblique transition structure.

[0073] In this embodiment, the balancing structure and the rotor are connected and fixed using a snap-fit ​​method. The laminated balancing structure provides the basis for the snap-fit ​​connection between the balancing structure and the rotor, and the snap-fit ​​connection completely solves the problem of the rivet heads agitating the refrigerant.

[0074] In this embodiment, the balance stack 10 of the balance structure is made of a non-magnetic material such as stainless steel, and each stack is 0.3 to 0.8 mm thick. When the thickness of the balance stack 10 is 0.3 to 0.8 mm, balance structures of different heights and weights can be achieved while ensuring the production efficiency and production cost of the machine tool.

[0075] In this embodiment, the snap point is a rounded rectangle; the length is 3-6mm; and the width is 0.5-1.5mm.

[0076] In this embodiment, the balancing structure further includes annular laminations disposed between the balancing laminations 10 and the rotor to effectively increase the weight of the balancing structure, thereby achieving counterweight. Specifically, there can be two or more annular laminations. To facilitate the positioning of the annular laminations, positioning parts for positioning are provided on opposite sides of the annular laminations.

[0077] In a second embodiment of the present invention, a rotor assembly is provided, including a rotor 20 and a balancing structure provided in the first embodiment, wherein the balancing structure is disposed on one side of the rotor 20. Specifically, the rotor assembly is part of a compressor.

[0078] In a third embodiment of the present invention, a compressor is provided, which includes the rotor assembly provided in a second embodiment.

[0079] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: by setting the balance structure as a structure composed of multiple balance plates 10 stacked together, and making the cross-section of the balance plate 10 decrease as the height of the balance structure increases, a gradual shape can be formed, thereby effectively guiding the refrigerant at the balance structure and reducing the pressure of the refrigerant on the balance structure, thereby improving the energy efficiency of the compressor.

[0080] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0081] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0082] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0083] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0084] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A counterbalance structure, characterized by, The balancing structure is installed at the end of the rotor (20), and the balancing structure includes: The balancing stack (10) is a plurality of stacked balancing stacks (10) along the axial direction of the rotor (20). The balancing structure has a first end and a second end disposed opposite to each other, the first end being located between the rotor (20) and the second end. In this process, along the extension direction from the first end to the second end, the cross-sectional area of ​​the plurality of balancing stacks (10) gradually decreases, so that the balancing structure has a gradient shape; The balancing stack (10) is an arc-shaped plate structure. The arc-shaped plate structure has a first stacking surface (11) and a second stacking surface (12) arranged opposite to each other. There is a first connecting end face (13) between one end of the first stacking surface (11) and one end of the second stacking surface (12), and there is a second connecting end face (14) between the other end of the first stacking surface (11) and the other end of the second stacking surface (12). The first connecting end face (13) is a smooth transition surface structure, so that one end of the first stacked surface (11) smoothly transitions to one end of the second stacked surface (12) through the first connecting end face (13); and / or, The second connecting end face (14) is a smooth transition surface structure so that the other end of the first stacked surface (11) smoothly transitions to the other end of the second stacked surface (12) through the second connecting end face (14).

2. The balancing structure according to claim 1, characterized in that, The first connecting end face (13) is a first arc surface structure; and / or, The second connecting end face (14) is a second arc surface structure.

3. The balancing structure according to claim 1, characterized in that, The first connecting end face (13) is a first inclined transition surface; and / or, The second connecting end face (14) is the second inclined transition surface.

4. The balancing structure according to claim 1, characterized in that, One end of the first stacked surface (11) is a first arc-shaped end (15); and / or, One end of the second stacked surface (12) is a second arc-shaped end (16); and / or, The other end of the first stacked surface (11) is a third arc-shaped end (17); and / or, The other end of the second stacked surface (12) is the fourth arc-shaped end (18).

5. The balancing structure according to claim 4, characterized in that, The first arc-shaped end (15) is tangentially disposed to the first connecting end face (13); and / or, The second arc-shaped end (16) is tangent to the first connecting end face (13).

6. The balancing structure according to claim 1, characterized in that, The balancing plate (10) is an arc plate-shaped structure. The arc length of the multiple balancing plates (10) gradually decreases along the extension direction from the first end to the second end.

7. The balancing structure according to claim 1, characterized in that, The balancing plate (10) is an arc plate-shaped structure. The height of the balancing plate (10) is H, the diameter of the circle corresponding to the balancing plate (10) is F, and the central angle corresponding to the balancing plate (10) is α. Among them, απF / (360H)≥0.5773.

8. The balancing structure according to claim 1, characterized in that, The plurality of the balancing stacks (10) include a first balancing stack and a second balancing stack arranged adjacent to each other, wherein the top surface of the first balancing stack is attached to the bottom surface of the second balancing stack.

9. The balancing structure according to claim 1, characterized in that, The balanced stack (10) has a first stacking surface (11) and a second stacking surface (12) disposed opposite to each other. A first positioning structure (191) is provided on the first stacking surface (11), and a second positioning structure (192) is provided on the second stacking surface (12) to cooperate with the first positioning structure (191); and / or, The balancing structure is made of a non-magnetic material.

10. A rotor assembly, characterized in that, include: Rotor (20); The balancing structure according to any one of claims 1 to 9, wherein the balancing structure is disposed on one side of the rotor (20).

11. A compressor, characterized in that, Includes the rotor assembly as described in claim 10.

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