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 are characterized in that the streamlined curved surface is smooth and fluent, the balancing block is in a streamlined structure, fluid mainly presents as laminar flow on the streamlined curved surface, there is no or little turbulent flow, the disturbance to gas when the rotor moves at a high speed is reduced, the influence of gas resistance is reduced, the position of the counterweight groove is changed and different counterweight blocks are replaced, the purpose of adjusting the center of mass of the rotor balancing structure is achieved, the weight and volume of the rotor balancing structure are reduced, the material is saved, the cost is reduced, and the rotating load of the motor rotating shaft is reduced.

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 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 set as streamline curved surfaces. This not only leads to 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 a significant increase in the weight and volume of the rotor, wasting materials and increasing the operating load of the motor shaft. SUMMARY

[0004] The purpose of the present application is to provide a rotor balancing structure and a compressor that can not only reduce the influence of air resistance, but also not excessively increase the weight and volume 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] The balancing block is a semicircular ring structure symmetrically arranged about a predetermined plane. The balancing block includes a top end surface and a bottom end surface arranged opposite along the height direction H thereof. The shape of the top end surface is the same as that 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 balancing block overlaps in the bottom end surface. The balancing block further includes an inner arc surface and an outer arc surface arranged opposite along the thickness direction T thereof. The opposite ends of the balancing block along the length direction L thereof are each provided with a streamline curved surface. The opposite ends of the inner arc surface and the outer arc surface along the height direction H of the balancing block are connected by the top end surface and the bottom end surface, respectively. The opposite ends of the inner arc surface and the outer arc surface along the length direction L of the balancing block are connected by the corresponding streamline curved surfaces, respectively. The balancing block is provided with a counterweight groove. The predetermined plane is perpendicular to the length direction L of the balancing block.

[0008] The counterweight block is filled and fixed in the counterweight groove.

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

[0010] As an alternative of the rotor balancing structure, the counterweight groove is provided with two, and the two counterweight grooves are arranged one by one corresponding to the two streamlined curved surfaces along the length direction L of the balancing block.

[0011] The counterweight block is provided with two, and the two counterweight blocks are filled and fixed one by one in the two counterweight grooves.

[0012] As an alternative of the rotor balancing structure, the density of the balancing block is ρ1, 6g / cm 3 ≤ρ1≤8g / cm 3 ;

[0013] The density of the counterweight block is ρ2, 0g / cm 3 <ρ2≤8g / cm 3 .

[0014] As an alternative of the rotor balancing structure, the counterweight groove is arranged in a staggered manner with the streamlined curved surface along the length direction L of the balancing block.

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

[0016] As an alternative of the rotor balancing structure, the included angle between the inner arc surface and the bottom end surface is smaller than the included angle between the outer arc surface and the bottom end surface.

[0017] As an alternative 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 arranged corresponding to the first mounting hole.

[0018] As an alternative 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] In another aspect, a compressor is provided, comprising a rotor and a rotor balancing structure as described above, and the balancing block is fixedly connected with the rotor.

[0020] Compared with the prior art, the rotor balancing structure and the compressor have the following beneficial effects:

[0021] The rotor balancing structure and the compressor have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an exploded view of the rotor balancing structure in the embodiment of the present application.

[0023] Figure 2 It is a structure diagram of the balancing block in the embodiment of the present application Figure One ;

[0024] Figure 3 It is a structure diagram of the balancing block in the embodiment of the present application Figure Two ;

[0025] Figure 4 It is a sectional view of A-A plane of Figure 2 .

[0026] Reference signs:

[0027] 100, preset plane; 1, balancing block; 11, top end surface; 12, bottom end surface; 13, inner side curved surface; 14, outer side curved surface; 15, streamline curved surface; 16, counterweight groove; 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 scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0029] 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0030] It should be noted that: similar 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.

[0031] 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.

[0032] 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.

[0033] In the present application, unless otherwise specified and limited, "on" or "under" the first feature to 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.

[0034] 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 referring to the drawings are exemplary, only for explaining the application, and cannot be understood as a limitation on the application.

[0035] As Figures 1-4As shown, the embodiment provides a rotor balancing structure, which comprises 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 comprises a top end surface 11 and a bottom end surface 12 oppositely arranged along a height direction H thereof. The top end surface 11 has 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 in the bottom end surface 12. The balancing block 1 further comprises an inner arc surface 13 and an outer arc surface 14 oppositely arranged along a thickness direction T thereof. The balancing block 1 is provided with a streamlined curved surface 15 at each of opposite ends thereof along a length direction L thereof. The inner arc surface 13 and the outer arc surface 14 are connected by the top end surface 11 and the bottom end surface 12, respectively, at opposite ends thereof along the height direction H of the balancing block 1. The inner arc surface 13 and the outer arc surface 14 are connected by the corresponding streamlined curved surface 15, respectively, at opposite ends thereof along the length direction L of the balancing block 1. 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 curved surface 15 is smooth and fluent, so that the balancing block 1 has a streamlined structure. Fluids on the surface of the streamlined curved surface 15 mainly exhibit laminar flow, without or with little turbulent flow. The disturbance to the gas caused by the high-speed movement of the rotor can be reduced, and the influence of the gas resistance can be reduced. By changing the position of the counterweight groove 16 and replacing the counterweight block 2, the mass center of the rotor balancing structure can be adjusted. This is beneficial to reduce the weight and volume of the rotor balancing structure, save materials, reduce costs, and reduce the operating load of the motor rotating shaft.

[0037] Optionally, the counterweight groove 16 is arranged in the bottom end surface 12. On the one hand, the counterweight groove 16 is convenient to process. On the other hand, when the counterweight block 2 is assembled in the counterweight groove 16 and the balancing block 1 is connected with the rotor, the slot opening of the counterweight groove 16 can be blocked by the rotor, so as to avoid the counterweight block 2 from being separated 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 is closely attached to the inner wall of the counterweight groove 16. By selecting a counterweight block 2 with different density, the weight of the counterweight block 2 can be changed, and the mass center of the rotor balancing structure can be adjusted.

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

[0040] Optionally, the density of the balancing block 1 is pi, 6g / cm 3 ≤ pi≤ 8g / cm 3 ; the density of the counterweight block 2 is p2, 0g / cm 3 < p2≤ 8g / cm 3 By selecting different densities of the balancing block 1 and different densities of the counterweight block 2, the rotor balancing structure can be matched to different displacements and different motor stack heights, and the application range is wider.

[0041] For example, the density pi of the balancing block 1 can be any value between 6g / cm 3 -8g / cm 3 , such as 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 , etc. The density p2 of the counterweight block 2 can be any value between 0g / cm 3 -8g / cm 3 , except 0g / cm 3 , such as 0.1g / 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 35.5g / 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 and so on.

[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 is arranged at a position staggered with the streamlined surface 15 along the length direction L of the balancing block 1. In other words, the counterweight groove 16 can be arranged between two streamlined surfaces 15, and the weight of the counterweight block 2 can be changed by selecting a counterweight block 2 with different density, so as to adjust the center of mass of the rotor balancing structure.

[0043] Further, the density of the counterweight block 2 is greater than the density of the balancing block 1, so as to facilitate the control of the position of the center of mass of the rotor balancing structure.

[0044] Optionally, the included angle between the inner arc surface 13 and the bottom end surface 12 is smaller than the included angle between the outer arc surface 14 and the bottom end surface 12, which is beneficial to reduce the wind resistance when the balancing block 1 is running.

[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 arranged correspondingly to the first mounting hole 17, so that the balancing block 1 and the rotor can be fixedly connected by penetrating the first mounting hole 17 and the second mounting hole 21 by a same rivet or other connecting member, and the counterweight block 2 and the balancing block 1 can also be fixedly connected, which is simple to operate and firm in fixation.

[0046] It should be noted that the counterweight block 2 can also be fixed in the counterweight groove 16 by using interference embedding, welding, bonding or other connecting methods, so that the counterweight block 2 and the balancing block 1 are fixedly connected, which is not limited herein.

[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, and facilitate to reduce the volume of the rotor balancing structure.

[0048] Optionally, in order to improve the process of the balancing block 1, facilitating processing, the bottom end of the balancing block 1 is provided with a first forming table 18, and the lower end of the counterweight block 2 is provided with a second forming table 22 corresponding to the first forming table 18, and the setting form of the first forming table 18 and the second forming table 22 is prior art, which will not be described here.

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

[0050] Note that the above are only the preferred embodiments of the present application and the applied technical principles. 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, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more 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, The application relates to a rotor balance structure, which comprises the following: a balance block (1) in a semicircular ring structure symmetrically arranged about a preset plane (100), the balance block (1) comprising a top end face (11) and a bottom end face (12) oppositely arranged along the height direction H of the balance block (1), the top end face (11) having the same shape as the bottom end face (12), and the projection of the top end face (11) on the bottom end face (12) along the height direction H of the balance block (1) overlapping in the bottom end face (12), the balance block (1) further comprising an inner arc face (13) and an outer arc face (14) oppositely arranged along the thickness direction T of the balance block (1), and the balance block (1) being provided with streamlined curved faces (15) at opposite ends along the length direction L of the balance block (1), the inner arc face (13) and the outer arc face (14) being connected at opposite ends along the height direction H of the balance block (1) by the top end face (11) and the bottom end face (12) respectively, and the inner arc face (13) and the outer arc face (14) being connected at opposite ends along the length direction L of the balance block (1) by the corresponding streamlined curved faces (15) respectively; the balance block (1) is provided with counterweight grooves (16), the counterweight grooves (16) being arranged on the bottom end face (12), the balance block (1) being provided with two counterweight grooves (16) arranged one by one along the length direction L of the balance block (1) and corresponding to the two streamlined curved faces (15); the preset plane (100) is perpendicular to the length direction L of the balance block (1). a counterweight (2) filled and fixed in the counterweight groove (16), the density of the counterweight (2) being p2, 0 g / cm 3 < p2≤ 8 g / cm 3 .

2. The rotor balancing structure according to claim 1, characterized by, The counterweight block (2) is provided with two counterweight blocks (2) arranged one by one in the two counterweight grooves (16) and fixed therein.

3. The rotor balancing structure according to claim 2, characterized by The density of the counterbalance (1) is pi, 6 g / cm 3 ≤ pi < 8 g / cm 3 .

4. The rotor balancing structure according to claim 1, characterized by, Along the length direction L of the balance block (1), the counterweight groove (16) and the streamlined curved face (15) are arranged in a staggered mode.

5. The rotor balancing structure according to claim 4, characterized by The density of the counterweight block (2) is greater than the density of the balance block (1).

6. The rotor balancing structure according to claim 1, characterized by The included angle between the inner arc face (13) and the bottom end face (12) is smaller than the included angle between the outer arc face (14) and the bottom end face (12).

7. The rotor balancing structure according to claim 1, characterized by The balance 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).

8. The rotor balancing structure according to claim 1, characterized by, The volume of the balance block (1) is v, and the volume of the rotor balance structure is V, so that v>=60%V.

9. A compressor characterized by, The application further relates to a rotor balance structure comprising a rotor and the rotor balance structure according to any one of claims 1-8, and the balance block (1) is fixedly connected with the rotor.

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