Rotor balance block and compressor

Abstract

The invention discloses a rotor balance block and a compressor, and belongs to the technical field of compressors. According to the rotor balance block and the compressor, one of the two first end side curved surfaces is the windward side, the other first end side curved surface is the leeward side, the windward side and the leeward side are arranged to be the streamline curved surfaces, the main body part is of a streamline structure, fluid is mainly represented as laminar flow on the surfaces of the streamline curved surfaces, and no or little turbulent flow exists; disturbance to gas during high-speed movement of the rotor can be reduced, and the gas resistance influence is reduced; by adding the fin-shaped part which is of a symmetrical structure relative to the preset plane, the purpose of flexibly adjusting the eccentricity of the rotor balance block can be achieved, then it is guaranteed that the mass center of the rotor balance block is located on the preset plane, the height of the main body part can be reduced under the condition that the weight of the main body part is not increased, and therefore wind resistance is reduced. Under the condition that the refrigerating capacity of the compressor is almost unchanged, the power of the compressor can be reduced by about 1%, and the performance is improved by about 1%.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a rotor balancing block 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 influence of gas resistance, the existing balancing block sets the windward and leeward surfaces of the balancing block as the first end side curved surface. 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 leads to an increase in the overall weight of the rotor, wasting materials and 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 weight and a compressor, which can not only reduce the influence of air resistance but also will not increase the weight of the rotor balancing weight.

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

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

[0007] The main body is a semicircular ring structure symmetrically arranged about a preset plane, and the main body includes a top end surface and a bottom end surface relatively arranged along its height direction H, the shape of the top end surface is the same as the shape of the bottom end surface, and the projection of the top end surface on the bottom end surface along the height direction H of the main body overlaps within the bottom end surface; the main body also includes a first inner curved surface and a first outer curved surface relatively arranged along its thickness direction T, and the two opposite ends of the main body along its length direction L are provided with a first end side curved surface, and the first end side curved surface is a streamlined curved surface, and the two opposite ends of the first inner curved surface and the first outer curved surface along the height direction H of the main body are respectively connected by the top end surface and the bottom end surface, and the two ends of the first inner curved surface and the first outer curved surface along the length direction L of the main body are respectively connected by the corresponding first end side curved surfaces; the preset plane is perpendicular to the length direction L of the main body;

[0008] A fin-shaped portion, wherein the fin-shaped portion is fixedly arranged on the top surface, and the fin-shaped portion is a semicircular ring structure symmetrically arranged about the preset plane; along the height direction H of the main body from bottom to top, the cross-sectional area of ​​the fin-shaped portion gradually decreases; the outer surface of the fin-shaped portion is a smooth curved surface; the cross-sectional area of ​​the fin-shaped portion is a cross-sectional area perpendicular to the height direction H of the main body.

[0009] As an optional solution for the rotor balancing weight, the lower end of the fin-shaped portion smoothly transitions to the top end surface through a rounded corner.

[0010] As an optional solution of the rotor balancing weight, the height of the fin-shaped portion is not greater than 50 mm; and / or,

[0011] The maximum central angle φ of the fin-shaped portion of the semicircular ring structure is less than 180°.

[0012] As an optional solution for the rotor balancing weight, the ratio of the area of ​​the top end surface to the area of ​​the bottom end surface is 0.2-0.8.

[0013] As an optional solution for the rotor balancing weight, the height of the main body is h, 3mm<h<30mm.

[0014] As an optional scheme for the rotor balancing block, the fin-shaped portion includes a second inner arc surface and a second outer arc surface which are relatively arranged along the thickness direction T of the main body, and the fin-shaped portion is provided with second end side curved surfaces at both opposite ends along the length direction L of the main body, the second inner arc surface is connected to the upper end of the second outer arc surface along the height direction H of the main body, the lower ends of the second inner arc surface and the second outer arc surface along the height direction H of the main body are both connected to the top end surface, and the second inner arc surface and the second outer arc surface are respectively connected at both ends along the length direction L of the main body through corresponding second end side curved surfaces.

[0015] As an optional solution for the rotor balancing weight, the second end side curved surface is a streamlined curved surface.

[0016] As an optional solution for the rotor balancing weight, the main body is provided with a mounting hole.

[0017] As an optional solution for the rotor balancing weight, the main body portion and the fin-shaped portion are integrally formed.

[0018] On the other hand, a compressor is provided, comprising a rotor and a rotor balancing block as described above, wherein the main body is fixedly connected to the rotor.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the rotor balancing block and the compressor of the present invention, one of the two first end side curved surfaces is the windward surface, and the other is the leeward surface. By setting both the windward surface and the leeward surface as streamlined curved surfaces, the main body has a streamlined structure, so that the fluid mainly exhibits laminar flow on the surface of the streamlined curved surface, 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 by adding a fin-shaped portion with a symmetrical structure about a preset plane, the purpose of flexibly adjusting the eccentricity of the rotor balancing block can be achieved, thereby ensuring that the center of mass of the rotor balancing block is located on the preset plane, and the height of the main body can be reduced without increasing the weight of the main body, thereby reducing wind resistance. Test results show that while keeping the refrigeration capacity of the compressor almost unchanged, the compressor power can be reduced by about 1% and the performance improved by about 1%. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the rotor balancing block in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the rotor balancing block in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 The structure of the rotor balancing block in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0024] Figure 4 The structure of the rotor balancing block in the embodiment of the present invention is shown in FIG. Figure 4 ;

[0025] Figure 5 for Figure 4 The cross-sectional view of the AA surface;

[0026] Figure 6 The structure of the fin portion in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 7 The structure of the fin portion in the embodiment of the present invention is shown in FIG. Figure 2 .

[0028] Reference numerals:

[0029] 100. Preset plane; 1. Main body; 11. Top end surface; 12. Bottom end surface; 13. First inner arc surface; 14. First outer arc surface; 15. First end side curved surface; 16. Mounting hole; 17. Forming table; 2. Fin-shaped portion; 21. Second inner arc surface; 22. Second outer arc surface; 23. Second end side curved surface; 24. Fillet. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] like Figure 1-7 As shown, the present embodiment provides a rotor balancing weight, including a main body 1 and a fin-shaped portion 2, the main body 1 is a semicircular ring structure symmetrically arranged about a preset plane 100, the main body 1 includes a top end surface 11 and a bottom end surface 12 relatively arranged along its height direction H, the shape of the top end surface 11 is the same as the shape 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 main body 1 overlaps inside the bottom end surface 12; the main body 1 also includes a first inner curved surface 13 and a first outer curved surface 14 relatively arranged along its thickness direction T, and the main body 1 is provided with a first end side curved surface 15 at both opposite ends along its length direction L, the first end side curved surface 15 is a streamlined curved surface, and the first inner curved surface 13 and the first outer curved surface 14 are relatively close to each other. The two opposite ends along the height direction H of the main body 1 are connected by the top end surface 11 and the bottom end surface 12 respectively, and the first inner curved surface 13 and the first outer curved surface 14 are connected by the corresponding first end side curved surfaces 15 at the two ends along the length direction L of the main body 1; the preset plane 100 is perpendicular to the length direction L of the main body 1, and the preset plane 100 is parallel to the thickness direction T of the main body 1 and the height direction H of the main body 1; the fin-shaped portion 2 is fixed on the top end surface 11, and the fin-shaped portion 2 is a semicircular ring structure symmetrically arranged about the preset plane 100; from bottom to top along the height direction H of the main body 1, the cross-sectional area of ​​the fin-shaped portion 2 gradually decreases; the outer surface of the fin-shaped portion 2 is a smooth curved surface; the cross-sectional area of ​​the fin-shaped portion 2 is a cross-sectional area perpendicular to the height direction H of the main body 1.

[0038] One of the two first end side curved surfaces 15 is the windward surface, and the other is the leeward surface. By setting both the windward surface and the leeward surface as streamlined curved surfaces, the main body 1 has a streamlined structure, so that the fluid on the surface of the streamlined curved surface 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 by adding a fin-shaped portion 2 with a symmetrical structure about the preset plane 100, the purpose of flexibly adjusting the eccentricity of the rotor balancing block can be achieved, thereby ensuring that the center of mass of the rotor balancing block is located on the preset plane 100, and the height of the main body 1 can be reduced without increasing the weight of the main body 1, thereby reducing wind resistance. Test results show that while keeping the compressor cooling capacity almost unchanged, the compressor power can be reduced by about 1% and the performance can be improved by about 1%.

[0039] It should be noted that the structure of the fin-shaped portion 2 mimics the structure of a shark fin, which can effectively reduce the wind resistance of the rotor balance weight. Optionally, the fin-shaped portion 2 includes a second inner curved surface 21 and a second outer curved surface 22 that are relatively arranged along the thickness direction T of the main body 1, and the fin-shaped portion 2 is provided with a second end side curved surface 23 at both opposite ends along the length direction L of the main body 1. The second inner curved surface 21 is connected to the upper end of the second outer curved surface 22 along the height direction H of the main body 1, and the lower ends of the second inner curved surface 21 and the second outer curved surface 22 along the height direction H of the main body 1 are connected to the top surface 11, and the second inner curved surface 21 and the second outer curved surface 22 are connected at both ends along the length direction L of the main body 1 through the corresponding second end side curved surface 23. In other words, the lower end surface of the fin-shaped portion 2 is a semicircular ring structure; at the upper end of the fin-shaped portion 2, the second inner curved surface 21 is connected to the second outer curved surface 22 and forms an arc.

[0040] Optionally, the second end side curved surface 23 is a streamlined curved surface, so that the fin-shaped portion 2 presents a streamlined structure with a smooth surface and flowing lines, further reducing the influence of air resistance on the rotor.

[0041] It should be noted that by adding the fin-shaped portion 2, the eccentricity of the rotor balance weight as a whole can be flexibly changed to ensure that the wind resistance is as small as possible. Optionally, the height of the fin-shaped portion 2 is not greater than 50 mm, so as to more flexibly adjust the eccentricity of the rotor balance weight as a whole.

[0042] When the maximum central angle φ of the fin-shaped portion 2 of the semicircular ring structure increases, the center of mass of the fin-shaped portion 2 is closer to the center of the circle, and the balancing effect of the rotor balance block will be reduced. Therefore, the maximum central angle φ of the fin-shaped portion 2 of the semicircular ring structure needs to be limited. Optionally, the maximum central angle φ of the fin-shaped portion 2 of the semicircular ring structure is less than 180°.

[0043] In this embodiment, the lower end of the fin-shaped portion 2 smoothly transitions to the top end surface 11 through the rounded corner 24, so that the fin-shaped portion 2 and the top end surface 11 are smoothly transitioned and connected, which is beneficial to further reduce wind resistance.

[0044] It can be understood that, in this embodiment, Figure 7 As shown, the maximum central angle φ of the fin-shaped portion 2 of the semicircular ring structure is the central angle corresponding to the two ends of the connection between the fillet 24 and the top end surface 11 along the length direction L of the main body 1.

[0045] In this embodiment, the top end surface 11 and the bottom end surface 12 are both semicircular ring structures. In order to facilitate flexible adjustment of the center of mass of the main body 1, optionally, the ratio of the area of ​​the top end surface 11 to the area of ​​the bottom end surface 12 is 0.2-0.8.

[0046] Exemplarily, the ratio of the area of ​​the top end surface 11 to the area of ​​the bottom end surface 12 may be any value between 0.2 and 0.8, such as 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc.

[0047] Optionally, the height of the main body 1 is h, 3mm<h<30mm. Such an arrangement can also make the adjustment of the center of mass of the main body 1 more flexible.

[0048] Exemplarily, the height h of the main body 1 can be any value between 3 mm and 30 mm (excluding 3 mm and 30 mm), such as 3.1 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 29 mm, 29.5 mm, etc.

[0049] Optionally, the main body 1 is provided with a mounting hole 16 so that a connecting member such as a pin can be passed through the mounting hole 16 to fix the main body 1 to the rotor.

[0050] In this embodiment, two mounting holes 16 are provided, and the two mounting holes 16 are respectively located on both sides of the fin portion 2 along the length direction L of the main body 1. Two rivets or other connecting members are respectively passed through the two mounting holes 16 to connect the main body 1 to the rotor, thereby improving the installation stability of the main body 1.

[0051] Optionally, the main body 1 and the fin-shaped portion 2 are integrally formed, which not only has good processability but also can improve the smoothness of the outer surface of the rotor balancing weight, thereby helping to reduce wind resistance.

[0052] Optionally, in order to improve the manufacturability of the rotor balancing block and facilitate processing, a forming table 17 is provided at the bottom end of the main body 1. The arrangement of the forming table 17 is the prior art and will not be described in detail herein.

[0053] This embodiment also provides a compressor, including a rotor and the rotor balancing block as described above, wherein the main body 1 is fixedly connected to the rotor. The compressor of this embodiment, by applying the rotor balancing block, has the same beneficial effects as the rotor balancing block, which will not be described in detail here.

[0054] 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. Rotor balancing weight, characterized in that: include: A main body (1), the main body (1) being a semicircular ring-shaped structure symmetrically arranged about a preset plane (100), the main body (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 shape of the top end surface (11) being the same as that of 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 main body (1) overlapping within the bottom end surface (12); the main body (1) further comprising a first inner curved surface (13) and a first outer curved surface (14) arranged opposite to each other along a thickness direction T thereof, the main body ( 1) both opposite ends along the length direction L thereof are provided with a first end side curved surface (15), the first end side curved surface (15) being a streamlined curved surface, the first inner curved surface (13) and the first outer curved surface (14) being connected at opposite ends along the height direction H of the main body (1) through the top end surface (11) and the bottom end surface (12) respectively, and the first inner curved surface (13) and the first outer curved surface (14) being connected at opposite ends along the length direction L of the main body (1) through the corresponding first end side curved surface (15); the preset plane (100) is perpendicular to the length direction L of the main body (1); A fin-shaped portion (2), the fin-shaped portion (2) being fixedly arranged on the top end surface (11), the fin-shaped portion (2) being a semicircular ring structure symmetrically arranged about the preset plane (100); along the height direction H of the main body (1) from bottom to top, the cross-sectional area of ​​the fin-shaped portion (2) gradually decreases; the outer surface of the fin-shaped portion (2) is a smooth curved surface; and the cross-sectional area of ​​the fin-shaped portion (2) is a cross-sectional area perpendicular to the height direction H of the main body (1).

2. The rotor balancing weight according to claim 1, characterized in that: The lower end of the fin-shaped portion (2) smoothly transitions to the top end surface (11) via a rounded corner (24).

3. The rotor balancing weight according to claim 1, characterized in that: The height of the fin-shaped portion (2) is not greater than 50 mm; and / or, The maximum central angle φ of the fin-shaped portion (2) of the semi-circular ring structure is less than 180°.

4. The rotor balancing weight according to claim 1, characterized in that: The ratio of the area of ​​the top end surface (11) to the area of ​​the bottom end surface (12) is 0.2-0.

8.

5. The rotor balancing weight according to claim 1, characterized in that: The height of the main body (1) is h, 3mm<h<30mm.

6. The rotor balancing weight according to claim 1, characterized in that: The fin-shaped portion (2) comprises a second inner curved surface (21) and a second outer curved surface (22) which are arranged opposite to each other along the thickness direction T of the main body (1); the fin-shaped portion (2) is provided with a second end curved surface (23) at two opposite ends along the length direction L of the main body (1); the second inner curved surface (21) and the second outer curved surface (22) are connected at their upper ends along the height direction H of the main body (1); the second inner curved surface (21) and the second outer curved surface (22) are connected at their lower ends along the height direction H of the main body (1) to the top surface (11); and the second inner curved surface (21) and the second outer curved surface (22) are connected at their two ends along the length direction L of the main body (1) via corresponding second end curved surfaces (23).

7. The rotor balancing weight according to claim 6, characterized in that: The second end side curved surface (23) is a streamlined curved surface.

8. The rotor balancing weight according to claim 1, characterized in that: The main body (1) is provided with a mounting hole (16).

9. The rotor balancing weight according to claim 1, characterized in that: The main body (1) and the fin-shaped portion (2) are integrally formed.

10. A compressor, characterized in that It comprises a rotor and a rotor balancing weight as described in any one of claims 1 to 9, wherein the main body (1) is fixedly connected to the rotor.

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