Rotor balancing structure and compressor

Abstract

The application discloses a rotor balancing structure and a compressor and belongs to the technical field of compressors.The rotor balancing structure and the compressor, the rotor balancing structure comprising a counterweight and a streamlined shell, the counterweight being a semicircular ring structure, the counterweight comprising an inner arc surface and an outer arc surface oppositely arranged along a thickness direction T thereof; at least one of opposite ends of the counterweight along a length direction L thereof is provided with the streamlined shell, the streamlined shell comprising a streamlined curved surface, the streamlined curved surface comprising a streamlined end surface, an inner connecting surface and an outer connecting surface, the inner connecting surface being connected between the streamlined end surface and the inner arc surface, the outer connecting surface being connected between the streamlined end surface and the outer arc surface, and the streamlined end surface being outwardly inclined from top to bottom along a height direction H of the counterweight.The streamlined curved surface is arranged on the streamlined shell, compared with the prior art, the weight of the rotor balancing structure is greatly reduced, and the volume of the rotor balancing structure is not greatly increased.

Description

TECHNICAL FIELD

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

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

[0003] In order to reduce the disturbance of the rotor to the gas during high-speed movement and reduce the influence of air resistance, the windward surface and the leeward surface of the balancing block are arranged as a streamline curved surface. This not only causes a significant increase in the volume of the balancing block, but also causes the balancing effect of the balancing block to be slightly weakened due to the offset of the center of mass. Therefore, the balancing block needs to be further increased in height to achieve the balancing effect, which ultimately leads to an increase in the overall weight of the rotor, wasting materials and increasing the operating load of the motor rotating shaft. SUMMARY

[0004] The purpose of the present application is to provide a rotor balancing structure and a compressor that not only reduces the influence of air resistance, but also does not excessively increase the weight of the rotor balancing structure.

[0005] To achieve the above-mentioned purpose, the following technical solutions are provided:

[0006] On the one hand, a rotor balancing structure is provided, comprising:

[0007] A counterweight block, the counterweight block is a semi-circular ring structure, the counterweight block includes an inner arc surface and an outer arc surface arranged opposite along a thickness direction T thereof;

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

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

[0010] As an optional solution of the rotor balancing structure, the streamline shell and the connecting plate are integrally formed.

[0011] As an optional solution of 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;

[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 of the rotor balancing structure, the counterweight further comprises a top end surface and a bottom end surface oppositely arranged along the height direction H thereof; the streamlined curved surface comprises a shell top end and a shell bottom end oppositely arranged along the height direction H of the counterweight, and the shell top end is fixedly connected with the top end surface, and the shell bottom end is flush with the bottom end surface.

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

[0017] As an optional solution of the rotor balancing structure, the counterweight 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 of the rotor balancing structure, the counterweight is provided with the streamlined shell at both ends thereof along the length direction L thereof; the weight of the rotor balancing structure is G, and the total weight of the two streamlined shells is g, and g≤20% G.

[0019] As an optional solution of the rotor balancing structure, the streamlined shell is formed by punching a plate material;

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

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

[0022] Compared with the prior art, the rotor balancing structure and the compressor have the following beneficial effects:

[0023] The rotor balancing structure and the compressor of the present application arrange the streamlined curved surface on the streamlined shell, which greatly reduces the weight of the rotor balancing structure, without causing the volume of the rotor balancing structure to greatly increase, so that the air resistance is reduced, the weight of the rotor balancing structure is not excessively increased, the material is saved, the cost is reduced, and the load of the motor rotating shaft is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 Structure diagram of the rotor balance structure in the embodiment of the present application Figure 1 ;

[0025] Figure 2 Structure diagram of the rotor balance structure in the embodiment of the present application Figure 2 ;

[0026] Figure 3 Exploded view of the rotor balance structure in the embodiment of the present application

[0027] Figure 4 Structure diagram of the streamlined shell and the connecting plate in the embodiment of the present application

[0028] Figure 5 Projection diagram of the streamlined shell and the connecting plate in the embodiment of the present application on a preset plane.

[0029] Reference signs:

[0030] 1, counterweight; 11, inner arc surface; 12, outer arc surface; 13, top end surface; 14, bottom end 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 end; 221, connecting end plate; 2211, third mounting hole; 23, shell bottom end; 3, connecting plate; 31, second mounting hole. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application 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 application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

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

[0034] In the description of the application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0035] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise specified and limited, "on" or "under" the first feature of the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0037] The embodiments of the application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, only for explaining the application, and cannot be understood as a limitation on the application.

[0038] As Figures 1-5As shown, the embodiment provides a rotor balancing structure, which comprises a counterweight 1 and a streamlined shell 2. The counterweight 1 is a semi-circular ring structure, and the counterweight 1 comprises an inner arc surface 11 and an outer arc surface 12 oppositely arranged along the thickness direction T thereof. It can be understood that the inner arc surface 11 and the outer arc surface 12 are both arc surfaces. At least one of the opposite ends of the counterweight 1 along the length direction L thereof is provided with the streamlined shell 2. The streamlined shell 2 comprises a streamlined curved surface 21, and the streamlined curved surface 21 comprises 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 arc surface 11, and the outer connecting surface 213 is connected between the streamlined end surface 211 and the outer arc surface 12. The streamlined end surface 211 is outwardly inclined from top to bottom along the height direction H of the counterweight 1, that is, 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, that is, the height direction H of the counterweight 1 is the axial direction of the rotor.

[0039] It should be noted that the streamlined curved surface 21 is the outer surface of the streamlined shell 2, that is, the outer surface of the streamlined shell 2 is streamlined, so that the fluid on the surface of the streamlined curved surface 21 mainly exhibits laminar flow, and there is little or no turbulent flow, which can reduce the air resistance when the rotor moves at high speed. By arranging the streamlined curved surface 21 on the streamlined shell 2, compared with the balancing block which is completely solid in the prior art, the weight of the rotor balancing structure is greatly reduced, and the volume of the rotor balancing structure is not greatly increased. Not only can the air resistance be reduced, but also the weight of the rotor balancing structure is not excessively increased, the material is saved, the cost is reduced, and the load of the motor rotating shaft is reduced.

[0040] Optionally, the counterweight 1 further comprises a top end surface 13 and a bottom end surface 14 oppositely arranged along the height direction H thereof, and the inner arc surface 11 and the outer arc surface 12 are connected by the top end surface 13 and the bottom end surface 14 at opposite ends along the height direction of the counterweight 1. The streamlined curved surface 21 comprises a shell top end 22 and a shell bottom end 23 oppositely arranged along the height direction H of the counterweight 1. The shell top end 22 is fixedly connected with the top end surface 13, and the shell bottom end 23 is flush with the bottom end surface 14, so that the effect of reducing air resistance of the streamlined shell 2 is better.

[0041] In the embodiment, the opposite ends of the counterweight 1 along the length direction L thereof are both provided with the streamlined shell 2. In other words, the streamlined curved surface 21 of one of the two streamlined shells 2 is a windward surface, and the streamlined curved surface 21 of the other is a leeward surface, further reducing the influence 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 housings 2 is g, and g≤20%G. In this way, the streamlined housing 2 can ensure that the wind resistance is reduced without significantly increasing the overall weight of the rotor balancing structure.

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

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

[0045] Optionally, the rotor balancing structure further comprises a connecting plate 3, and in this embodiment, one end of the connecting plate 3 is fixedly connected with one streamlined housing 2, and the other end is fixedly connected with the other streamlined housing 2. The streamlined housing 2 and the counterweight 1 are connected by the connecting plate 3 to form a circular ring-shaped whole, which not only facilitates the connection of the rotor balancing structure and the rotor, but also improves the installation stability of the rotor balancing structure.

[0046] In other embodiments, the streamlined housing 2 can also be provided only one, in other words, the counterweight 1 is provided with a streamlined housing 2 at one of the opposite ends along the length direction L, and the other end is not provided with a streamlined housing 2, and one end of the connecting plate 3 is fixedly connected with the streamlined housing 2, and the other end is fixedly connected with the counterweight 1.

[0047] Optionally, the connecting plate 3 is a semi-circular ring structure, which facilitates matching with the rotor and improves the connection stability of the rotor balancing structure and the rotor. At the same time, compared with the connecting plate 3 of the circular ring structure 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, the bottom end 23 of the streamlined housing 2, and the bottom surface of the connecting plate 3 are flush, so as to match with 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, which reduces the assembly steps and improves the structural stability.

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

[0051] 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 with a diameter of D; the preset plane is perpendicular to the height direction H of the counterweight 1, in other words, the preset plane is a plane perpendicular to the rotor axial direction; the diameter of the projection of the inner connecting surface 212 on the preset plane is not less than 60% D; and the diameter of the projection of the outer connecting surface 213 on the preset plane is not greater than 140% D. In this way, the streamlined shell 2 can ensure that the wind resistance is reduced without excessively increasing the overall volume of the rotor balancing structure.

[0052] Optionally, the top end 22 is provided with a connecting end plate 221, which is fixedly connected with the top end surface 13 through surface-to-surface connection, thereby increasing the contact area of the streamlined shell 2 and the counterweight 1 and improving the connection stability of the streamlined shell 2 and the counterweight 1.

[0053] Optionally, the connecting end plate 221 is provided with a third mounting hole 2211 corresponding to the first mounting hole 15, and a connecting member such as a rivet can be inserted into the third mounting hole 2211 to fixedly connect the connecting end plate 221 and the top end surface 13, which is simple and convenient to operate.

[0054] Of course, in other embodiments, the connecting end plate 221 and the top end surface 13 can also be fixedly connected by means of interference fitting, welding, bonding, etc., which are not limited herein.

[0055] The embodiment also provides a compressor comprising a rotor and the rotor balancing structure as described above, wherein the counterweight 1 and the streamlined shell 2 are fixedly connected with the rotor. The compressor of the embodiment has the same beneficial effects as the rotor balancing structure described above.

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

Claims

1. A rotor balancing structure, characterized by, include: The counterweight (1) is a semi-circular ring structure, and the counterweight (1) includes an inner arc surface (11) and an outer arc surface (12) arranged opposite to each other along its thickness direction T. A streamlined shell (2) is provided at least one end of the counterweight (1) along its length direction L. The streamlined shell (2) includes a streamlined curved surface (21). The streamlined curved surface (21) includes a streamlined end face (211), an inner connecting surface (212), and an outer connecting surface (213). The inner connecting surface (212) is connected between the streamlined end face (211) and the inner arc surface (11). The outer connecting surface (213) is connected between the streamlined end face (211) and the outer arc surface (12). The streamlined end face (211) is inclined outward from top to bottom along the height direction H of the counterweight (1). The counterweight (1) further includes a top surface (13) and a bottom surface (14) arranged opposite to each other along its height direction H; the streamlined curved surface (21) includes a shell top surface (22) and a shell bottom surface (23) arranged opposite to each other along the height direction H of the counterweight (1), the shell top surface (22) is fixedly connected to the top surface (13), and the shell bottom surface (23) is flush with the bottom surface (14); The counterweight (1) has streamlined shells (2) at both ends along its length direction L; 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.

2. The rotor balancing structure according to claim 1, characterized by, 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 is fixedly connected to the counterweight (1) or another of the streamlined shells (2).

3. The rotor balancing structure according to claim 2, characterized by The streamlined shell (2) and the connecting plate (3) are integrally formed.

4. The rotor balancing structure according to claim 2, characterized by The counterweight (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 onto the preset plane, the center of the first mounting hole (15) and the center of the second mounting hole (31) are located in the same circle, and the diameter of the circle is D; the preset plane is perpendicular to the height direction H of the counterweight (1); The diameter of the projection of the inner connecting surface (212) onto the preset plane is not less than 60%D; The diameter of the projection of the outer connecting surface (213) onto the preset plane is not greater than 140%D.

5. The rotor balancing structure according to claim 1, characterized by The top end (22) of the shell is provided with a connecting end plate (221), and the connecting end plate (221) is fixedly connected to the top end surface (13).

6. The rotor balancing structure according to claim 5, characterized by The counterweight (1) is provided with a first mounting hole (15); the connecting end plate (221) is provided with a third mounting hole (2211) corresponding to the first mounting hole (15).

7. The rotor balancing structure according to claim 1, characterized by The streamlined shell (2) is formed by sheet metal stamping; The thickness of the plate is t, where 0.5mm ≤ t ≤ 1.5mm.

8. Compressor, characterized in that The rotor balance structure according to any one of claims 1-7, wherein the rotor balance structure is fixedly connected with the rotor.

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