Balance block, motor rotor assembly and compressor

Abstract

The utility model provides a counterbalance, motor rotor assembly and compressor, wherein the counterbalance comprises a counterbalance main body, the counterbalance main body extends along the circumferential direction of the motor rotor, the counterbalance main body is provided with a windward end and a leeward end, the windward end is provided with a flow guide surface, and the leeward end is provided with a flow guide groove. The flow guide surface comprises a first flow dividing surface and a second flow dividing surface which form an included angle with each other, and the first flow dividing surface and the second flow dividing surface are intersected at a first ridge line; the two ends of the first ridge line are the intersection point of the radial outer edge of the far-end plane of the balance block body and the flow guide face and the intersection point of the radial inner edge of the near-end plane of the balance block body and the flow guide face respectively. According to the utility model, the risks of large oil spitting amount of the compressor and insufficient lubricating oil in the compressor caused by single-direction pumping in the prior art are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor design technical field, concretely relates to a balance block, motor rotor subassembly and compressor. BACKGROUND

[0002] When the compressor works, the airflow in the compressor is complex and changeable, and there is a cross-section mutation at the edge position near the windward end and / or the leeward end, thereby causing the gas flow to mutate, generating vortex, turbulence and other various adverse phenomena, resulting in increased wind resistance of the compressor, generating additional noise, etc. Figure 1 As shown in the example, it is a conventional balance block structure, and the windward end is a plane structure. During the operation of the compressor, the balance block rotates with the motor rotor, which generates a large wind resistance, disturbs the airflow in the compressor, increases the oil discharge rate of the compressor, and generates additional noise. In order to optimize the foregoing deficiencies of the prior art, the related art sets an inclined flow guide surface at the windward end and / or the leeward end of the balance block to reduce the wind resistance during the rotation of the balance block, thereby reducing the agitation of the balance block to the refrigerant airflow in the compressor, and reducing the oil discharge rate and operating noise of the compressor to a certain extent. However, the flow guide surface of the balance block of this structure extends to the side away from the end surface of the motor rotor, which causes the flow guide surface to form a single-direction pumping effect on the refrigerant airflow when the balance block rotates, especially the airflow flow path (i.e. pumping path) generated by the pumping effect is directed to the side of the exhaust port of the compressor, which in turn increases the oil discharge amount (oil content in exhaust) of the compressor to a certain extent, which increases the risk of insufficient lubricating oil in the compressor. SUMMARY

[0003] Therefore, the utility model provides a balance block, motor rotor subassembly and compressor, which can overcome the technical problem that the flow guide surface of the windward end of the balance block on the motor rotor in the related art generates a single-direction pumping effect on the refrigerant in contact with it, resulting in a large oil discharge amount of the compressor, and increasing the risk of insufficient lubricating oil in the compressor.

[0004] In order to solve the above problems, the utility model provides a balance block, assembly is in the first end face of motor rotor, including balance block main part, balance block main part extends along the circumference of motor rotor, balance block main part has the windward end and the leeward end, the flow guide surface is formed on the windward end, the flow guide surface includes the first shunt surface and the second shunt surface that form the included angle between each other, the first shunt surface and the second shunt surface intersect in first ridge line, the both ends of first ridge line are respectively the intersection of the radial outer edge of the distal end plane of balance block main part and the flow guide surface, the intersection of the radial inner edge of the proximal end plane of balance block main part and the flow guide surface, or, the both ends of first ridge line are respectively the intersection of the radial inner edge of the distal end plane of balance block main part and the flow guide surface, the intersection of the radial outer edge of the proximal end plane of balance block main part and the flow guide surface, the distal end plane is the plane of balance block main part away from the first end face, the proximal end plane is the plane of balance block main part close to the first end face.

[0005] In some embodiments, the first ridge line is a convex position of the flow guide surface.

[0006] In some embodiments, the first shunt surface and the second shunt surface are both planes, and the included angle is a, 90°≤a<180°.

[0007] In some embodiments, the first shunt surface and the second shunt surface are both curved surfaces.

[0008] In some embodiments, the first ridge line is rounded; and / or, one of the first shunt surface and the second shunt surface is perpendicular to the first end face.

[0009] In some embodiments, the first shunt surface is radially outside the second shunt surface, the intersection position of the first shunt surface and the distal end plane, the radial outer annular surface and / or the proximal end plane of the balance block main part is smoothly processed, and / or the intersection position of the second shunt surface and the distal end plane, the radial inner annular surface and / or the proximal end plane of the balance block main part is smoothly processed.

[0010] In some embodiments, the proximal end plane has a pad extending towards the first end face, the pad extends along the circumference of the motor rotor, and positioning surfaces are formed at the circumferential ends of the pad, the positioning surfaces are coplanar with one axial section of the motor rotor.

[0011] In some embodiments, the pad is integrally formed with the balance block main part.

[0012] The utility model also provides a motor rotor assembly, including motor rotor and the balance weight of being assembled to the first end face of motor rotor, balance weight is above mentioned balance weight.

[0013] The utility model also provides a compressor, including above -mentioned motor rotor assembly, the compressor has exhaust, the first end face is the end face of motor rotor close to one side of exhaust.

[0014] The balance weight, motor rotor assembly and compressor provided by the utility model have the following beneficial effects:

[0015] The single planar flow guide surface of the windward end in the prior art is improved into a flow guide surface composed of a first flow dividing surface and a second flow dividing surface, an included angle is formed between the first flow dividing surface and the second flow dividing surface, so that the first flow dividing surface and the second flow dividing surface can form a path for pumping the refrigerant gas stream in a direction away from the first end surface while also simultaneously forming a path for pumping in the radial inward and outward directions of the motor rotor, effectively reducing the risk of excessive oil discharge of the compressor and insufficient lubricating oil in the compressor due to single-direction pumping in the prior art; it needs to be particularly pointed out that the two ends of the first ridge line in the utility model are the edges of the distal end surface and the proximal end surface of the balance weight main body and form a diagonal line, so that the pumping direction of the first flow dividing surface and the second flow dividing surface of the utility model is in a substantially balanced state in the radial inward and outward directions, which is beneficial to the dynamic balance of the motor rotor;

[0016] The intersection position of the first flow dividing surface and the second flow dividing surface is a convex structure, so that the convex ridge can break the flow division of the refrigerant gas stream during the rotation of the balance weight, further reducing the wind resistance during the rotation of the balance weight;

[0017] The first flow dividing surface and the second flow dividing surface are both designed as planar structures, which can simplify the processing and manufacturing difficulty of the flow guide surface and further reduce the processing cost;

[0018] The first flow dividing surface and the second flow dividing surface are both designed as curved surface structures, which can further reduce the wind resistance during the rotation of the balance weight;

[0019] The first ridge line can be passivated to reduce the probability of damage caused by collision of parts, thereby reducing the production and storage and transportation costs;

[0020] The intersection positions of each flow guide surface and the distal end surface, the radial inward annular surface, the proximal end surface and the radial outward annular surface are rounded, which can make each connection area smoother, i.e. realize smooth connection of the intersection surface, effectively reduce the probability of turbulence caused by the existence of mutation, thereby reducing the pressure difference resistance;

[0021] By further arranging the cushion layer on the proximal end plane of the balance block body, the corresponding positioning surfaces can be arranged at the circumferential two ends of the cushion layer, so that the circumferential positioning of the motor rotor in the magnetizing process or the assembling process through the balance block is realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. The drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be derived from the provided drawings without creative labor.

[0023] Figure 1 is a perspective structural schematic view of a balance block in the conventional technology;

[0024] Figure 2 is a perspective structural schematic view of a balance block in an embodiment of the present application;

[0025] Figure 3 is a left side view of the balance block in Figure 2 ;

[0026] Figure 4 is a top view of the balance block in Figure 2 ;

[0027] Figure 5 is a perspective structural schematic view of a balance block in another embodiment of the present application, in which the first flow dividing surface is perpendicular to the first end surface, and the sharp corner formed by the intersection of the flow guiding surface and the proximal end plane is rounded;

[0028] Figure 6 is a top view of the balance block in Figure 5 ;

[0029] Figure 7 is a perspective structural schematic view of a balance block in still another embodiment of the present application, in which the second flow dividing surface is perpendicular to the first end surface;

[0030] Figure 8 is a top view of Figure 7 ;

[0031] Figure 9 is a perspective structural schematic view of a balance block in still another embodiment of the present application, in which the positioning surface is shown;

[0032] Figure 10 is a top view of Figure 9 .

[0033] The reference signs are:

[0034] 1. balance block body; 11. guide surface; 111. first sub-flow surface; 112. second sub-flow surface; 113. first ridge line; 12. positioning surface; 13. connecting hole. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0037] For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0038] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the present application.

[0039] For a better understanding of the present application, reference will be made to the following drawings in conjunction with the embodiments of the present application.Figures 2 to 10 As shown, according to the embodiment of the utility model, provide a balance block, assembled on the first end surface (not shown, not marked in the drawing) of motor rotor (not shown, not marked in the drawing), including balance block main body 1, balance block main body 1 along the circumferential direction of motor rotor extends, balance block main body 1 has windward end (not marked in the drawing) and leeward end (not marked in the drawing), form the flow guide surface 11 on the windward end, the flow guide surface 11 includes the first flow surface 111 and the second flow surface 112 that form the included angle between each other, can be understood, the aforementioned included angle should not be 0 ° or 180 °, to ensure that the first flow surface 111 and the second flow surface 112 are different, the first flow surface 111 and the second flow surface 112 intersect at the first ridge line 113, the two ends of the first ridge line 113 are respectively the radial outer edge (not marked in the drawing) of the distal end plane of the balance block main body 1 and the intersection of the flow guide surface 11, the radial inner edge (not marked in the drawing) of the proximal end plane of the balance block main body 1 and the intersection of the flow guide surface 11, or, the two ends of the first ridge line 113 are respectively the radial inner edge (not marked in the drawing) of the distal end plane of the balance block main body 1 and the intersection of the flow guide surface 11, the radial outer edge (not marked in the drawing) of the proximal end plane of the balance block main body 1 and the intersection of the flow guide surface 11. Formed on the distal end plane is a connecting hole 13 through the distal end plane and the proximal end plane, and the balance block is reliably and stably assembled on the first end surface of the motor rotor by the screw arranged in the connecting hole 13. The distal end plane is the plane of the balance block main body 1 away from the first end surface, and the proximal end plane is the plane of the balance block main body 1 close to the first end surface.

[0040] In the technical solution, the single-plane flow guide surface of the windward end in the prior art is improved to a flow guide surface composed of the first flow surface 111 and the second flow surface 112. Since the first flow surface 111 and the second flow surface 112 form an included angle therebetween, the first flow surface 111 and the second flow surface 112 can form a path for pumping the refrigerant gas flow away from the first end surface while also simultaneously forming paths for pumping in the radial direction of the motor rotor. This effectively reduces the risk of excessive oil discharge of the compressor and insufficient lubricating oil in the compressor due to single-direction pumping in the prior art.

[0041] In some embodiments, the aforementioned flow guide surface 11 composed of the first flow surface 111 and the second flow surface 112 can also be formed on the leeward end of the balance block main body 1. At this time, the flow guide surface 11 on the leeward end and the flow guide surface 11 on the windward end are mirror images about the symmetry plane of the balance block main body 1. This can improve the versatility of the balance block, so that the balance block can be applied to the working conditions of the bidirectional rotating motor rotor.

[0042] In some embodiments, the first ridge line 113 is a convex position of the flow guide surface 11, that is, the first ridge line 113 is a convex ridge, so that the flow guide surface 11 objectively forms a structure type gradually decreasing to the left and right sides of the first ridge line 113 (that is, the radial inner and outer directions of the balance block main body 1).

[0043] In the technical solution, the intersection position of the first flow distribution surface 111 and the second flow distribution surface 112 is a convex structure, so that the convex ridge can break the flow of the refrigerant gas during the rotation of the balance block, thereby further reducing the wind resistance during the rotation of the balance block.

[0044] In some embodiments, the first flow distribution surface 111 and the second flow distribution surface 112 are both planes, and the included angle a can be understood as the dihedral angle between the first flow distribution surface 111 and the second flow distribution surface 112, and at this time, 90°≤a<180°. When the included angle is less than 90°, the flow distribution surface near the bottom end will form a concave phenomenon, causing additional wind resistance. When the included angle is not less than 180°, the ridge line is a concave ridge and cannot break the flow.

[0045] In the technical solution, the first flow distribution surface 111 and the second flow distribution surface 112 are both designed as plane structures, which can simplify the processing and manufacturing difficulty of the flow guide surface 11, thereby reducing the processing cost.

[0046] In some feasible embodiments, the first flow distribution surface 111 and the second flow distribution surface 112 can also be designed as curved surfaces (for example, circular arc surfaces), and at this time, the aforementioned included angle corresponds to the included angle between the tangent planes of the intersection portions of the first flow distribution surface 111 and the second flow distribution surface 112 and the first ridge line 113.

[0047] In the technical solution, the first flow distribution surface 111 and the second flow distribution surface 112 are both designed as curved surfaces, which can further reduce the wind resistance during the rotation of the balance block.

[0048] In some embodiments, the first ridge line 113 is rounded to achieve the passivation of the first ridge line 113, which can reduce the probability of damage caused by collision of the parts after the passivation of the first ridge line 113, thereby reducing the production and storage and transportation costs.

[0049] In some embodiments, the first flow distribution surface 111 is radially outside the second flow distribution surface 112, as shown in FIG. 1B. Figure 2 At this time, the first flow distribution surface 111 forms upward and outward (with respect to the radial direction of the balance block main body 1) flow of the refrigerant gas in contact with it. Figure 2The shown orientation is referenced, and the first flow surface 111 at the left end is pumped upward and left, and the second flow surface 112 forms an upward and inward flow with the refrigerant gas flow in contact with it. Figure 2 The shown orientation is referenced, and the first flow surface 111 at the left end is pumped upward and right, and the first flow surface 111 is smoothly treated at the intersection position with the distal end plane, the radial outer annular surface and / or the proximal end plane of the balance block body 1, and / or the second flow surface 112 is smoothly treated at the intersection position with the distal end plane, the radial inner annular surface and / or the proximal end plane of the balance block body 1, for example, a corresponding fillet is arranged at the corresponding intersection position (the fillet treatment is realized).

[0050] In the technical scheme, the intersection position of each flow surface and the distal end plane, the radial inner annular surface, the proximal end plane and the radial outer annular surface is rounded, which can make each connection area smoother, that is, realize the smooth connection of the intersection surface, effectively reduce the probability of turbulence phenomenon caused by the existence of mutation, thereby reducing the pressure difference resistance.

[0051] In some embodiments, one of the first flow surface 111 and the second flow surface 112 is vertically arranged between the first end surface, that is, one of the first flow surface 111 and the second flow surface 112 is in a vertical state, which can avoid the collision of the two upward gas flows, thereby avoiding the generation of additional power consumption and turbulent gas flow.

[0052] In some embodiments, the proximal end plane has a pad layer extending towards the first end surface (not labeled in the figure), the pad layer extends along the circumference of the motor rotor, and positioning surfaces 12 are formed at the circumferential ends of the pad layer, the positioning surfaces 12 are coplanar with one axial section of the motor rotor, and the aforementioned axial section is a radial plane passing through the rotating shaft of the motor rotor.

[0053] In the technical scheme, by further arranging the pad layer on the proximal end plane of the balance block body 1, the corresponding positioning surfaces 12 can be arranged at the circumferential ends of the pad layer, thereby realizing the circumferential positioning of the motor rotor through the balance block during the magnetizing process or the assembly process.

[0054] In some embodiments, the pad layer is integrally formed with the balance block body 1.

[0055] In the technical scheme, the pad layer is integrally formed with the balance block body 1, which can improve the assembly efficiency between the balance block and the motor rotor.

[0056] According to the embodiments of the utility model, a motor rotor assembly is also provided, which comprises a motor rotor and a balance block assembled on the first end surface of the motor rotor, and the balance block is the above-mentioned balance block.

[0057] According to the embodiment of the present application, a compressor is also provided, comprising the motor rotor assembly, the compressor has an exhaust port, the first end face is the end face of the motor rotor close to the exhaust port side.

[0058] Those skilled in the art can easily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0059] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.

Claims

1. A balance weight assembled on a first end surface of a rotor of an electric machine, characterized in that, The balance block body (1) extends along the circumference of the motor rotor, and has a windward end and a leeward end, a guide surface (11) is formed on the windward end, the guide surface (11) comprises a first flow dividing surface (111) and a second flow dividing surface (112) which form an included angle therebetween, the first flow dividing surface (111) and the second flow dividing surface (112) intersect at a first ridge line (113), two ends of the first ridge line (113) are respectively one of a radially outer edge of a distal end plane of the balance block body (1) and an intersection of the guide surface (11), a radially inner edge of a proximal end plane of the balance block body (1) and an intersection of the guide surface (11), or the two ends of the first ridge line (113) are respectively one of the radially inner edge of the distal end plane of the balance block body (1) and the intersection of the guide surface (11), the radially outer edge of the proximal end plane of the balance block body (1) and the intersection of the guide surface (11), the distal end plane is a plane of the balance block body (1) away from the first end surface, and the proximal end plane is a plane of the balance block body (1) close to the first end surface.

2. The balance block of claim 1, wherein, The first ridge line (113) is a convex position of the guide surface (11).

3. The balance block of claim 2, wherein, The first flow dividing surface (111) and the second flow dividing surface (112) are both planes, and the included angle is a, 90°≤a<180°.

4. The balance block of claim 2, wherein, The first flow dividing surface (111) and the second flow dividing surface (112) are both curved surfaces.

5. The balance block of claim 1, wherein, The first ridge line (113) is rounded; and / or, one of the first flow dividing surface (111) and the second flow dividing surface (112) is perpendicular to the first end surface.

6. The balance block of claim 1, wherein, The first flow dividing surface (111) is radially outside the second flow dividing surface (112), and the intersection position of the first flow dividing surface (111) with the distal end plane, the radially outer annular surface and / or the proximal end plane of the balance block body (1) is smoothly processed, and / or the intersection position of the second flow dividing surface (112) with the distal end plane, the radially inner annular surface and / or the proximal end plane of the balance block body (1) is smoothly processed.

7. The balance block of claim 1, wherein, The proximal end plane has a pad extending towards the first end surface, the pad extends along the circumference of the motor rotor, and a positioning surface (12) is formed at both circumferential ends of the pad, the positioning surface (12) is coplanar with an axial section of the motor rotor.

8. The balance block of claim 7, wherein, The pad is integrally formed with the balance block body (1).

9. An electric machine rotor assembly comprising an electric machine rotor and a balance weight assembled to a first end face of the electric machine rotor, characterized in that The balance block is the balance block of any one of claims 1 to 8.

10. A compressor characterized by, The compressor has an exhaust port, and the first end surface is an end surface of the motor rotor close to the exhaust port. The compressor has an exhaust port, and the first end surface is an end surface of the motor rotor close to the exhaust port.

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