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 streamline curved surface is smooth in surface and smooth in line, so that the balance block is of a streamline structure, fluid is mainly represented as laminar flow and has no or little turbulent flow on the surface of the streamline curved surface, disturbance to gas during high-speed movement of the rotor can be reduced, and the influence of gas resistance can be reduced; and the purpose of adjusting the mass center of the rotor balance structure can be achieved by changing the positions of the counterweight grooves and replacing different counterweight blocks, so that the weight and the size of the rotor balance structure can be reduced, materials are saved, the cost is reduced, and the operation load of a motor rotating shaft is reduced.

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 when the rotor moves at high speed and reduce the impact of gas resistance, the existing balancing block has its windward and leeward sides set as streamlined surfaces. This not only greatly increases 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 leads to a significant increase in the overall weight and volume of the rotor, wasting materials while increasing the operating load of the motor shaft. Summary of the invention

[0004] The 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 will not excessively increase the weight and volume of the rotor balancing structure.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

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

[0007] A balancing block, wherein the balancing block is a semicircular ring-shaped structure symmetrically arranged about a preset plane, wherein the balancing block comprises a top face and a bottom face which are arranged oppositely along a height direction H thereof, wherein the shape of the top face is the same as that of the bottom face, and the projection of the top face on the bottom face along the height direction H of the balancing block overlaps within the bottom face, wherein the balancing block further comprises an inner curved surface and an outer curved surface which are arranged oppositely along a thickness direction T thereof, wherein both opposite ends of the balancing block along a length direction L thereof are provided with streamlined surfaces, wherein the opposite ends of the inner curved surface and the outer curved surface along the height direction H of the balancing block are respectively connected through the top face and the bottom face, and the opposite ends of the inner curved surface and the outer curved surface along the length direction L of the balancing block are respectively connected through the corresponding streamlined surfaces; wherein the balancing block is provided with a counterweight slot; and the preset plane is perpendicular to the length direction L of the balancing block;

[0008] A counterweight block is filled in and fixed in the counterweight slot.

[0009] As an optional solution for the rotor balancing structure, the counterweight groove is opened on the bottom end surface.

[0010] As an optional solution for the rotor balancing structure, two counterweight grooves are provided, and along the length direction L of the balancing block, the two counterweight grooves are arranged in one-to-one correspondence with the two streamlined curved surfaces;

[0011] There are two counterweight blocks, and the two counterweight blocks are filled and fixed in the two counterweight grooves in a one-to-one correspondence.

[0012] As an optional solution for the rotor balancing structure, the density of the balancing block is ρ 1 , 6g / cm 3 ≤ρ 1 ≤8g / cm 3 ;

[0013] The density of the counterweight is ρ 2 , 0g / cm 3 <ρ 2 ≤8g / cm 3 .

[0014] As an optional solution for the rotor balancing structure, along the length direction L of the balancing block, the counterweight groove and the streamlined curved surface are arranged in a staggered manner.

[0015] As an optional solution of the rotor balancing structure, the density of the counterweight block is greater than the density of the balancing block.

[0016] As an optional solution for the rotor balancing structure, the angle between the inner arc surface and the bottom end surface is smaller than the angle between the outer arc surface and the bottom end surface.

[0017] As an optional solution of the rotor balancing structure, the balancing block is provided with a first mounting hole, and the counterweight block is provided with a second mounting hole corresponding to the first mounting hole.

[0018] As an optional solution of the rotor balancing structure, the volume of the balancing block is v, and the volume of the rotor balancing structure is V, then v≥60%V.

[0019] On the other hand, a compressor is provided, comprising a rotor and the rotor balancing structure as described above, wherein the balancing block is fixedly connected to the rotor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The rotor balancing structure and compressor of the present invention have a streamlined curved surface with smooth lines, so that the balancing block has a streamlined structure, so that the fluid on the streamlined curved surface mainly exhibits laminar flow with little or no turbulence, which can reduce the disturbance of the gas when the rotor moves at high speed and reduce the influence of gas resistance; and the purpose of adjusting the center of mass of the rotor balancing structure can be achieved by changing the position of the counterweight groove and replacing different counterweight blocks, which is beneficial to reducing the weight and volume of the rotor balancing structure, saving materials, reducing costs, and reducing the operating load of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of a rotor balancing structure in an embodiment of the present invention;

[0023] Figure 2 The structure of the balancing block in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 3 The structure of the balancing block in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 4 for Figure 2 Cross-sectional view of the AA surface.

[0026] Reference numerals:

[0027] 100. Preset plane; 1. Balance block; 11. Top end surface; 12. Bottom end surface; 13. Inner arc surface; 14. Outer arc surface; 15. Streamlined curved surface; 16. Counterweight slot; 17. First mounting hole; 18. First forming platform; 2. Counterweight block; 21. Second mounting hole; 22. Second forming platform. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 here can be arranged and designed in various different configurations.

[0029] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] 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, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product 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.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] like Figure 1-4As shown, this embodiment provides a rotor balancing structure, including a balancing block 1 and a counterweight block 2. The balancing block 1 is a semicircular ring structure symmetrically arranged about a preset plane 100. The balancing block 1 includes a top end surface 11 and a bottom end surface 12 that are relatively arranged along its height direction H. The shape of the top end surface 11 is the same as that of the bottom end surface 12, and the projection of the top end surface 11 on the bottom end surface 12 along the height direction H of the balancing block 1 overlaps inside the bottom end surface 12. The balancing block 1 also includes an inner arc surface 13 and an outer arc surface 14 that are relatively arranged along its thickness direction T. Side curved surface 14, streamlined curved surfaces 15 are provided at opposite ends of the balancing block 1 along its length direction L, the inner curved surface 13 and the outer curved surface 14 are connected at opposite ends along the height direction H of the balancing block 1 respectively through the top end surface 11 and the bottom end surface 12, and the inner curved surface 13 and the outer curved surface 14 are connected at opposite ends along the length direction L of the balancing block 1 respectively through corresponding streamlined curved surfaces 15; the balancing block 1 is provided with a counterweight groove 16; the preset plane 100 is perpendicular to the length direction L of the balancing block 1; the counterweight block 2 is filled and fixed in the counterweight groove 16.

[0036] It should be noted that the streamlined surface 15 has a smooth surface and flowing lines, so that the balancing block 1 has a streamlined structure, so that the fluid on the surface of the streamlined surface 15 mainly exhibits laminar flow, with no or little turbulence, which can reduce the disturbance of the gas when the rotor moves at high speed and reduce the influence of gas resistance; and the purpose of adjusting the center of mass of the rotor balancing structure can be achieved by changing the position of the counterweight slot 16 and replacing different counterweight blocks 2, which is beneficial to reducing the weight and volume of the rotor balancing structure, saving materials, reducing costs, and reducing the operating load of the motor shaft.

[0037] Optionally, the counterweight groove 16 is opened on the bottom end surface 12. On the one hand, it is convenient to process the counterweight groove 16. On the other hand, when the counterweight block 2 is assembled in the counterweight groove 16 and the balancing block 1 is connected to the rotor, the rotor can be used to block the notch of the counterweight groove 16 to prevent the counterweight block 2 from escaping from the counterweight groove 16.

[0038] It should be noted that the counterweight block 2 is filled in the counterweight groove 16. In other words, the counterweight block 2 fits tightly against the inner wall of the counterweight groove 16. By selecting counterweight blocks 2 with different densities, the weight of the counterweight block 2 can be changed and the center of mass of the rotor balancing structure can be adjusted.

[0039] The positions where the counterweight groove 16 can be set are various. In this embodiment, two counterweight grooves 16 are provided, and two counterweight blocks 2 are provided. The two counterweight blocks 2 are filled and fixed in the two counterweight grooves 16 in a one-to-one correspondence. Optionally, along the length direction L of the balancing block 1, the two counterweight grooves 16 are arranged in a one-to-one correspondence with the two streamlined surfaces 15. In other words, the counterweight grooves 16 are located below the corresponding streamlined surfaces 15. It should be noted that the smaller the density of the counterweight block 2, the more the center of mass of the rotor balancing structure is offset to the outside, which is conducive to reducing the volume of the rotor balancing structure.

[0040] Optionally, the density of the balancing weight 1 is ρ1,6 g / cm 3 ≤ρ1≤8g / cm 3 ; The density of the weight block 2 is ρ2,0g / cm 3 <ρ2≤8g / cm 3 By selecting balancing blocks 1 of different densities and counterweight blocks 2 of different densities, the rotor balancing structure can be matched with machines of different displacements and different motor stacking heights, and has a wider range of applications.

[0041] For example, the density ρ1 of the balancing weight 1 may be 6 g / cm 3 -8g / cm 3 Any value between, for example 6g / cm 3 、6.1g / cm 3 、6.2g / cm 3 、6.3g / cm 3 、6.4g / cm 3 、6.5g / cm 3 、6.6g / cm 3 、6.7g / cm 3 、6.8g / cm 3 、6.9g / cm 3 , 7g / cm 3 , 7.1g / cm 3 , 7.2g / cm 3 , 7.3g / cm 3 , 7.4g / cm 3 , 7.5g / cm 3 , 7.6g / cm 3 , 7.7g / cm 3 , 7.8g / cm 3 、7.9g / cm 3 , 8g / cm 3 The density ρ2 of the counterweight 2 can be 0 g / cm 3 -8g / cm 3 Except 0g / cm 3 Any value other than 0.1 g / cm 3 , 0.5g / cm 3 , 1g / cm 3 , 1.5g / cm 3 , 2g / cm 3 , 2.5g / cm 3 , 3g / cm 3 , 3.5g / cm 3 , 4g / cm 3 4.5g / cm 3 , 5g / cm 3, 5.5g / cm 3 , 6g / cm 3 、6.1g / cm 3 、6.2g / cm 3 、6.3g / cm 3 、6.4g / cm 3 、6.5g / cm 3 、6.6g / cm 3 、6.7g / cm 3 、6.8g / cm 3 、6.9g / cm 3 , 7g / cm 3 , 7.1g / cm 3 , 7.2g / cm 3 , 7.3g / cm 3 , 7.4g / cm 3 , 7.5g / cm 3 , 7.6g / cm 3 , 7.7g / cm 3 , 7.8g / cm 3 、7.9g / cm 3 , 8g / cm 3 wait.

[0042] Of course, in other embodiments, the counterweight groove 16 can also be arranged at other positions of the balancing block 1, for example, the counterweight groove 16 and the streamlined curved surface 15 are arranged in a staggered manner along the length direction L of the balancing block 1. In other words, the counterweight groove 16 can be arranged between two streamlined curved surfaces 15, and the weight of the counterweight block 2 can be changed by selecting counterweight blocks 2 with different densities, and the center of mass of the rotor balancing structure can be adjusted.

[0043] Furthermore, the density of the counterweight block 2 is greater than that of the balancing block 1, which makes it easier to control the center of mass position of the rotor balancing structure.

[0044] Optionally, the angle between the inner curved surface 13 and the bottom end surface 12 is smaller than the angle between the outer curved surface 14 and the bottom end surface 12 , which is beneficial to reducing the wind resistance of the balancing weight 1 during operation.

[0045] Optionally, the balancing block 1 is provided with a first mounting hole 17, and the counterweight block 2 is provided with a second mounting hole 21 corresponding to the first mounting hole 17, so that the balancing block 1 can be fixedly connected to the rotor by passing through the first mounting hole 17 and the second mounting hole 21 through the same connecting piece such as a rivet, and the counterweight block 2 can also be fixedly connected to the balancing block 1, which is simple to operate and firmly fixed.

[0046] It should be noted that the counterweight 2 may be fixed in the counterweight groove 16 by interference fit, welding, bonding or other connection methods, and the counterweight 2 is fixedly connected to the balancing block 1 , which is not limited here.

[0047] Optionally, the volume of the balancing block 1 is v, and the volume of the rotor balancing structure is V, then v≥60%V, so as to adjust the center of mass position of the rotor balancing structure, which is beneficial to reducing the volume of the rotor balancing structure.

[0048] Optionally, in order to improve the manufacturability of the balancing block 1 and facilitate processing, a first forming table 18 is provided at the bottom end of the balancing block 1, and a second forming table 22 corresponding to the first forming table 18 is provided at the lower end of the counterweight block 2. The setting form of the first forming table 18 and the second forming table 22 is the existing technology and will not be repeated here.

[0049] This embodiment also provides a compressor, including a rotor and the rotor balancing structure as described above, wherein the balancing block 1 is fixedly connected to the rotor. The compressor of this embodiment has the same beneficial effects as the rotor balancing structure by applying the rotor balancing structure, which will not be described in detail here.

[0050] Note that the above are only preferred embodiments of the present invention and the technical principles used. 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 more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotor balancing structure, characterized in that: include: A balancing block (1), the balancing block (1) being a semicircular ring-shaped structure symmetrically arranged about a preset plane (100), the balancing block (1) comprising a top end surface (11) and a bottom end surface (12) arranged opposite to each other along a height direction H thereof, the top end surface (11) having the same shape as the bottom end surface (12), and a projection of the top end surface (11) on the bottom end surface (12) along the height direction H of the balancing block (1) overlaps within the bottom end surface (12), the balancing block (1) further comprising an inner curved surface (13) and an outer curved surface (14) arranged opposite to each other along a thickness direction T thereof, the plane The balance block (1) is provided with streamlined curved surfaces (15) at two opposite ends along the length direction L thereof; the inner curved surface (13) and the outer curved surface (14) at two opposite ends along the height direction H of the balance block (1) are connected respectively through the top end surface (11) and the bottom end surface (12); the inner curved surface (13) and the outer curved surface (14) at two opposite ends along the length direction L of the balance block (1) are connected respectively through the corresponding streamlined curved surfaces (15); the balance block (1) is provided with a counterweight groove (16); the preset plane (100) is perpendicular to the length direction L of the balance block (1); A counterweight block (2), the counterweight block (2) is filled in and fixed in the counterweight groove (16).

2. The rotor balancing structure according to claim 1, characterized in that: The counterweight groove (16) is opened on the bottom end surface (12).

3. The rotor balancing structure according to claim 2, characterized in that: There are two counterweight grooves (16), and along the length direction L of the balance block (1), the two counterweight grooves (16) are arranged in one-to-one correspondence with the two streamlined curved surfaces (15); Two counterweight blocks (2) are provided, and the two counterweight blocks (2) are filled and fixed in the two counterweight grooves (16) in a one-to-one correspondence.

4. The rotor balancing structure according to claim 3, characterized in that: The density of the balancing block (1) is ρ1,6 g / cm 3 ≤ρ1≤8g / cm 3 ; The density of the counterweight (2) is ρ2,0 g / cm 3 <ρ2≤8g / cm 3 .

5. The rotor balancing structure according to claim 2, characterized in that: Along the length direction L of the balancing block (1), the counterweight groove (16) and the streamlined curved surface (15) are arranged in a staggered manner.

6. The rotor balancing structure according to claim 5, characterized in that: The density of the counterweight block (2) is greater than the density of the balancing block (1).

7. The rotor balancing structure according to claim 1, characterized in that: The included angle between the inner curved surface (13) and the bottom end surface (12) is smaller than the included angle between the outer curved surface (14) and the bottom end surface (12).

8. The rotor balancing structure according to claim 1, characterized in that: The balancing block (1) is provided with a first mounting hole (17), and the counterweight block (2) is provided with a second mounting hole (21) arranged corresponding to the first mounting hole (17).

9. The rotor balancing structure according to claim 1, characterized in that: The volume of the balancing block (1) is v, and the volume of the rotor balancing structure is V, then v≥60%V.

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 balancing block (1) is fixedly connected to the rotor.

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