Rotor balance structure and compressor

Abstract

The invention discloses a rotor balance structure and a compressor, and belongs to the technical field of compressors. According to the rotor balance structure and the compressor, the rotor balance structure comprises a balancing weight and a streamline shell, the balancing weight is of a semi-annular structure, and the balancing weight comprises an inner side cambered surface and an outer side cambered surface which are oppositely arranged in the thickness direction T of the balancing weight; at least one of the two opposite ends of the balancing weight in the length direction L of the balancing weight is provided with a streamline shell, the streamline shell comprises a streamline curved surface, the streamline curved surface comprises a streamline end face, an inner connecting face and an outer connecting face, the inner connecting face is connected between the streamline end face and the inner side arc face, and the outer connecting face is connected between the streamline end face and the outer side arc face. The streamline end face is obliquely arranged outwards from top to bottom in the height direction H of the balancing weight. The streamline curved surface is arranged on the streamline shell, compared with the prior art, the weight of the rotor balance structure is greatly reduced, and the size of the rotor balance structure cannot be greatly increased.

Description

Technical Field

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

[0002] In order to improve the stability of the compressor, a balancing block is usually provided on the rotor to offset the radial force of the compressor rotor on the motor shaft, thereby ensuring the reliable operation of the compressor.

[0003] In order to reduce the disturbance to the gas during high-speed movement of the rotor and reduce the impact of gas resistance, the existing balancing block has its windward and leeward sides set as streamlined surfaces. This not only leads to a significant increase in the volume of the balancing block, but also slightly weakens the balancing effect of the balancing block due to the offset of the center of mass. The balancing block needs to be further raised to achieve the balancing effect, which ultimately increases the overall weight of the rotor, wastes materials and increases the operating load of the motor shaft. Summary of the Invention

[0004] An object of the present invention is to provide a rotor balancing structure and a compressor, which can not only reduce the influence of air resistance but also do not excessively increase the weight of the rotor balancing structure.

[0005] To achieve the above objectives, the following technical solutions are provided:

[0006] In one aspect, a rotor balancing structure is provided, comprising:

[0007] A counterweight block, the counterweight block is a semicircular ring structure, and the counterweight block includes an inner curved surface and an outer curved surface arranged opposite to each other along the thickness direction T thereof;

[0008] A streamlined shell is provided at at least one of the two opposite ends of the counterweight block along its length direction L, and the streamlined shell includes a streamlined curved surface, and the streamlined curved surface includes a streamlined end surface, an inner connecting surface and an outer connecting surface, the inner connecting surface is connected between the streamlined end surface and the inner arc surface, the outer connecting surface is connected between the streamlined end surface and the outer arc surface, and the streamlined end surface is inclined outward from top to bottom along the height direction H of the counterweight block.

[0009] As an optional solution of the rotor balancing structure, the rotor balancing structure further includes a connecting plate, one end of which is fixedly connected to one of the streamlined shells, and the other end of which is fixedly connected to the counterweight block or another streamlined shell.

[0010] As an optional solution to the rotor balancing structure, the streamlined housing and the connecting plate are formed integrally.

[0011] As an optional solution for the rotor balancing structure, the counterweight block is provided with a first mounting hole; the connecting plate is provided with a second mounting hole;

[0012] In the projection of the rotor balancing structure on a preset plane, the center of the first mounting hole and the center of the second mounting hole are located on the same circle, and the diameter of the circle is D; the preset plane is perpendicular to the height direction H of the counterweight block;

[0013] The diameter of the projection of the inner connecting surface on the preset plane is not less than 60% D;

[0014] The diameter of the projection of the outer connecting surface on the preset plane is not greater than 140%D.

[0015] As an optional solution for the rotor balancing structure, the counterweight block also includes a top end surface and a bottom end surface arranged opposite to each other along its height direction H; the streamlined curved surface includes a shell top end and a shell bottom end arranged opposite to each other along the height direction H of the counterweight block, the shell top end is fixedly connected to the top end surface, and the shell bottom end is flush with the bottom end surface.

[0016] As an optional solution for the rotor balancing structure, a connecting end plate is provided at the top end of the shell, and the connecting end plate is fixedly connected to the top end surface.

[0017] As an optional solution for the rotor balancing structure, the counterweight block is provided with a first mounting hole; and the connecting end plate is provided with a third mounting hole corresponding to the first mounting hole.

[0018] As an optional solution for the rotor balancing structure, the counterweight block is provided with streamlined shells at both opposite ends along its length direction L; the weight of the rotor balancing structure is G, and the total weight of the two streamlined shells is g, then g≤20%G.

[0019] As an optional solution for the rotor balancing structure, the streamlined housing is formed by stamping a sheet metal;

[0020] The thickness of the plate is t, 0.5mm≤t≤1.5mm.

[0021] On the other hand, a compressor is provided, comprising a rotor and the rotor balancing structure as described above, wherein the counterweight and the streamlined housing are both fixedly connected to the rotor.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The rotor balancing structure and compressor of the present invention provide a streamlined curved surface on a streamlined casing. Compared with the prior art, the weight of the rotor balancing structure is greatly reduced without causing a significant increase in the volume of the rotor balancing structure. This not only reduces the impact of air resistance but also does not excessively increase the weight of the rotor balancing structure, thereby saving materials, reducing costs, and reducing the operating load of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The structure diagram of the rotor balancing structure in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The structure diagram of the rotor balancing structure in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 An exploded view of a rotor balancing structure according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the streamlined housing and the connecting plate in an embodiment of the present invention;

[0028] Figure 5 Schematic diagram of the projection of the streamlined shell and the connecting plate on a preset plane in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Counterweight; 11. Inner arc surface; 12. Outer arc surface; 13. Top surface; 14. Bottom surface; 15. First mounting hole; 2. Streamlined shell; 21. Streamlined curved surface; 211. Streamlined end surface; 212. Inner connecting surface; 213. Outer connecting surface; 22. Shell top; 221. Connecting end plate; 2211. Third mounting hole; 23. Shell bottom; 3. Connecting plate; 31. Second mounting hole. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] like Figure 1-5As shown, this embodiment provides a rotor balancing structure, including a counterweight 1 and a streamlined shell 2. The counterweight 1 is a semi-circular ring structure, and includes an inner arc surface 11 and an outer arc surface 12 relatively arranged along its thickness direction T; it can be understood that the inner arc surface 11 and the outer arc surface 12 are both arc-shaped surfaces. The counterweight 1 is provided with a streamlined shell 2 at least at one of its two opposite ends along its length direction L. The streamlined shell 2 includes a streamlined curved surface 21. The streamlined curved surface 21 includes a streamlined end surface 211, an inner connecting surface 212, and an outer connecting surface 213. The inner connecting surface 212 is connected between the streamlined end surface 211 and the inner curved surface 11, and the outer connecting surface 213 is connected between the streamlined end surface 211 and the outer curved surface 12. The streamlined end surface 211 is tilted outward from top to bottom along the height direction H of the counterweight 1. In other words, the distance between the streamlined end surface 211 and the counterweight 1 gradually increases from top to bottom along the height direction H of the counterweight 1. It should be noted that the height direction H of the counterweight 1 is perpendicular to the thickness direction T of the counterweight 1. In other words, the height direction H of the counterweight 1 is the axial direction of the rotor.

[0039] It should be noted that streamlined surface 21 is the smooth, flowing outer surface of streamlined housing 2. In other words, the outer surface of streamlined housing 2 is streamlined, so that the fluid on streamlined surface 21 exhibits primarily laminar flow, with little or no turbulence, thereby reducing wind resistance during high-speed rotor movement. The provision of streamlined surface 21 on streamlined housing 2 significantly reduces the weight of the rotor balancing structure compared to the completely solid balancing blocks of the prior art, without significantly increasing the rotor balancing structure's volume. This not only reduces the effects of air resistance but also avoids excessively increasing the weight of the rotor balancing structure, saving materials, reducing costs, and lowering the operating load on the motor shaft.

[0040] Optionally, the counterweight 1 also includes a top surface 13 and a bottom surface 14 relatively arranged along its height direction H, and the inner arc surface 11 and the outer arc surface 12 are connected at opposite ends along the height direction of the counterweight 1 by the top surface 13 and the bottom surface 14 respectively; the streamlined curved surface 21 includes a shell top 22 and a shell bottom 23 relatively arranged along the height direction H of the counterweight 1, the shell top 22 is fixedly connected to the top surface 13, and the shell bottom 23 is flush with the bottom surface 14, so that the streamlined shell 2 can better reduce wind resistance.

[0041] In this embodiment, the counterweight 1 is provided with streamlined shells 2 at opposite ends along its length direction L. In other words, the streamlined curved surface 21 of one of the two streamlined shells 2 is the windward side, and the streamlined curved surface 21 of the other is the leeward side, further reducing the impact of air resistance on the rotor.

[0042] Optionally, the weight of the rotor balancing structure is G, and the total weight of the two streamlined shells 2 is g, then g≤20% G. In this way, the streamlined shell 2 can reduce wind resistance without significantly increasing the weight of the entire rotor balancing structure.

[0043] Optionally, the streamlined housing 2 is formed by stamping a sheet material; the sheet material has a thickness t, 0.5 mm ≤ t ≤ 1.5 mm. For example, the sheet material thickness t can be any value between 0.5 mm and 1.5 mm, such as 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 0.10 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, etc. This facilitates sheet material stamping and ensures the strength of the streamlined housing 2.

[0044] Exemplarily, the streamlined housing 2 is formed by stamping a non-magnetic stainless steel plate.

[0045] Optionally, the rotor balancing structure further includes a connecting plate 3. In this embodiment, one end of the connecting plate 3 is fixedly connected to one streamlined housing 2, and the other end is fixedly connected to the other streamlined housing 2. The connecting plate 3 connects the streamlined housing 2 and the counterweight 1 to form a circular, integral whole. This not only facilitates connection of the rotor balancing structure to the rotor, but also improves the installation stability of the rotor balancing structure.

[0046] In other embodiments, only one streamlined shell 2 may be provided. In other words, one of the two opposite ends of the counterweight block 1 along its length direction L is provided with a streamlined shell 2, and the other is not provided with a streamlined shell 2. One end of the connecting plate 3 is fixedly connected to the streamlined shell 2, and the other end is fixedly connected to the counterweight block 1.

[0047] Optionally, the connecting plate 3 is a semi-circular ring structure, which facilitates matching with the rotor and improves the connection stability between the rotor balancing structure and the rotor. At the same time, compared with the circular ring structure of the connecting plate 3 in the prior art, the weight of the connecting plate 3 can be reduced, thereby reducing the weight of the rotor balancing structure.

[0048] In this embodiment, the bottom end surface 14 of the counterweight 1 and the bottom end 23 of the streamlined housing 2 are flush with the bottom surface of the connecting plate 3 so as to match the rotor and improve the installation stability of the rotor balancing structure.

[0049] Optionally, the streamlined housing 2 and the connecting plate 3 are integrally formed to reduce assembly steps and improve structural stability.

[0050] In this embodiment, the counterweight block 1 is provided with a first mounting hole 15, and a connecting member such as a rivet can be used to pass through the first mounting hole 15 to rivet the counterweight block 1 to the rotor; the connecting plate 3 is provided with a second mounting hole 31, and a connecting member such as a rivet can be used to pass through the second mounting hole 31 to rivet the connecting plate 3 to the rotor.

[0051] In the projection of the rotor balancing structure onto a predetermined plane, the centers of the first mounting hole 15 and the second mounting hole 31 lie on the same circle, with a diameter of D. The predetermined plane is perpendicular to the height direction H of the counterweight 1; in other words, it is perpendicular to the rotor axis. The diameter of the projection of the inner connecting surface 212 onto the predetermined plane is no less than 60% of D; and the diameter of the projection of the outer connecting surface 213 onto the predetermined plane is no more than 140% of D. This ensures that the streamlined housing 2 reduces wind resistance without excessively increasing the overall volume of the rotor balancing structure.

[0052] Optionally, a connecting end plate 221 is provided at the top end 22 of the shell, and the connecting end plate 221 is fixedly connected to the top end surface 13. Through the surface-to-surface connection, the contact area between the streamlined shell 2 and the counterweight block 1 is increased, thereby improving the connection stability between the streamlined shell 2 and the counterweight block 1.

[0053] Optionally, the connecting end plate 221 is provided with a third mounting hole 2211 corresponding to the first mounting hole 15. A connecting piece such as a rivet can be passed through the third mounting hole 2211 to fix the connecting end plate 221 to the top surface 13, which is simple and convenient to operate.

[0054] Of course, in other embodiments, the streamlined shell 2 and the counterweight 1 may be fixedly connected by interference fit, welding, bonding, or other connection methods, which are not limited here.

[0055] This embodiment further provides a compressor, comprising a rotor and the rotor balancing structure as described above, wherein the counterweight 1 and the streamlined housing 2 are both fixedly connected to the rotor. The compressor of this embodiment, by applying the rotor balancing structure as described above, has the same beneficial effects as the rotor balancing structure as described above.

[0056] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Rotor balancing structure, characterized in that: include: A counterweight block (1), the counterweight block (1) being a semicircular ring structure, the counterweight block (1) comprising an inner curved surface (11) and an outer curved surface (12) arranged opposite to each other along a thickness direction T thereof; A streamlined shell (2), wherein the streamlined shell (2) is provided at least at one of the two opposite ends of the counterweight (1) along the length direction L thereof, the streamlined shell (2) comprising a streamlined curved surface (21), the streamlined curved surface (21) comprising a streamlined end surface (211), an inner connecting surface (212) and an outer connecting surface (213), the inner connecting surface (212) being connected between the streamlined end surface (211) and the inner curved surface (11), the outer connecting surface (213) being connected between the streamlined end surface (211) and the outer curved surface (12), and the streamlined end surface (211) being arranged to be inclined outward from top to bottom along the height direction H of the counterweight (1).

2. The rotor balancing structure according to claim 1, characterized in that: The rotor balancing structure also includes a connecting plate (3), one end of which is fixedly connected to one of the streamlined shells (2), and the other end of which is fixedly connected to the counterweight (1) or another of the streamlined shells (2).

3. The rotor balancing structure according to claim 2, characterized in that: The streamlined housing (2) and the connecting plate (3) are integrally formed.

4. The rotor balancing structure according to claim 2, characterized in that: The counterweight block (1) is provided with a first mounting hole (15); the connecting plate (3) is provided with a second mounting hole (31); In the projection of the rotor balancing structure on a preset plane, the center of the first mounting hole (15) and the center of the second mounting hole (31) are located on the same circle, and the diameter of the circle is D; the preset plane is perpendicular to the height direction H of the counterweight block (1); The diameter of the projection of the inner connecting surface (212) on the preset plane is not less than 60% D; The diameter of the projection of the outer connecting surface (213) on the preset plane is no greater than 140%D.

5. The rotor balancing structure according to claim 1, characterized in that: The counterweight block (1) further comprises a top end surface (13) and a bottom end surface (14) which are arranged opposite to each other along its height direction H; the streamlined curved surface (21) comprises a shell top end (22) and a shell bottom end (23) which are arranged opposite to each other along the height direction H of the counterweight block (1); the shell top end (22) is fixedly connected to the top end surface (13), and the shell bottom end (23) is flush with the bottom end surface (14).

6. The rotor balancing structure according to claim 5, characterized in that: The shell top end (22) is provided with a connecting end plate (221), and the connecting end plate (221) is fixedly connected to the top end surface (13).

7. The rotor balancing structure according to claim 6, characterized in that: The counterweight block (1) is provided with a first mounting hole (15); and the connecting end plate (221) is provided with a third mounting hole (2211) arranged corresponding to the first mounting hole (15).

8. The rotor balancing structure according to claim 1, characterized in that: The counterweight block (1) is provided with the streamlined shells (2) at two opposite ends along the length direction L thereof; the weight of the rotor balancing structure is G, and the total weight of the two streamlined shells (2) is g, then g≤20%G.

9. The rotor balancing structure according to claim 1, characterized in that: The streamlined housing (2) is formed by stamping a plate; The thickness of the plate is t, 0.5 mm ≤ t ≤ 1.5 mm.

10. A compressor, characterized in that It comprises a rotor and a rotor balancing structure as claimed in any one of claims 1 to 9, wherein the counterweight (1) and the streamlined shell (2) are both fixedly connected to the rotor.

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