Balance block, motor rotor assembly and compressor
By setting outer and inner chamfer structures on the balance block to guide airflow, the high power consumption and noise problems caused by internal airflow disturbances in the compressor are solved, resulting in lower wind resistance and oil discharge rate, and reduced operating noise and processing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-10
AI Technical Summary
The compressor has large airflow disturbances, which leads to problems such as high power consumption, high noise, and high oil discharge rate.
Design a balance block with an outer chamfered structure and an inner chamfered structure to guide airflow, reduce eddies and turbulence, and reduce wind resistance through a tapered airflow guide section.
It reduces compressor power consumption, operating noise, and oil discharge rate, ensures sufficient lubrication, and lowers processing costs.
Smart Images
Figure CN224111005U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of compressor design technology, specifically relating to a balance block, a motor rotor assembly, and a compressor. Background Technology
[0002] When the compressor is working, the airflow inside the compressor is complex and changeable. There are abrupt changes in the cross-section at the edge positions near the windward end and / or the leeward end, which leads to abrupt changes in the gas flow direction and generates various adverse phenomena such as eddies and turbulence, resulting in increased compressor wind resistance and additional noise.
[0003] like Figure 1 As shown in the example, in a conventional balance block structure, during compressor operation, the air-facing end of the balance block draws gaseous refrigerant away from the rotor center. The arrow in the diagram indicates the direction of one of the airflow streams. As the airflow flows outward from the end face, turbulence occurs at the edge, creating localized low pressure. This results in pressure differential resistance on the balance block, increasing compressor power consumption, air resistance, and noise, and leading to a higher oil discharge rate. Utility Model Content
[0004] Therefore, this utility model provides a balance block, a motor rotor assembly, and a compressor, which can overcome the technical problems in related technologies where the balance block on the motor rotor causes significant disturbance to the airflow inside the compressor during rotation, resulting in relatively high compressor power consumption, compressor oil discharge rate, and operating noise.
[0005] To address the aforementioned problems, this utility model provides a balance block assembled on the first end face of a motor rotor. The balance block includes a balance block body extending circumferentially along the motor rotor. The balance block body has a windward end and a leeward end, and also has a proximal plane close to the motor rotor and a distal plane away from the motor rotor. The intersection area of the radial outer edge of the windward end face and the distal plane forms an outer chamfer structure, which guides the windward airflow at the windward end.
[0006] In some embodiments, the area where the windward end face intersects with the radial inner edge of the distal plane forms an inner chamfer structure, which can guide the windward airflow at the windward end.
[0007] In some embodiments, the outer chamfer structure is a plane or curved surface that is inclined along the direction away from the main body of the balance block and close to the rotation axis of the motor rotor; and / or, the inner chamfer structure is a plane or curved surface that is inclined along the direction away from the main body of the balance block and away from the rotation axis of the motor rotor.
[0008] In some embodiments, the windward end face has a flow guide extending along the circumference of the motor rotor, the cross-sectional area of the flow guide decreases along the circumference away from the balance block body, and the flow guide and the windward end face are smoothly connected; and / or, the outer side chamfer structure and the inner side chamfer structure are smoothly connected in the radial direction of the balance block body.
[0009] In some embodiments, the cross-section of the flow guide is circular or elliptical.
[0010] In some embodiments, when the cross-section of the flow guide is circular or elliptical, the intersection area of the windward end face and the radial outer edge ridge and the radial inner edge ridge of the proximal end plane respectively forms the outer side chamfer structure and the inner side chamfer structure.
[0011] In some embodiments, the balance block body has a radial outer annular surface and a radial inner annular surface, the windward end face and the radial outer annular surface are transitionally connected through a first transition surface, the windward end face and the radial inner annular surface are transitionally connected through a second transition surface, the windward end face and the distal end plane are transitionally connected through a third transition surface, the first transition surface and the third transition surface form the outer side chamfer structure, and the second transition surface and the third transition surface form the inner side chamfer structure.
[0012] In some embodiments, the radial outer edge ridge and / or the radial inner edge ridge of the balance block body is rounded.
[0013] The utility model discloses a motor rotor assembly, including motor rotor and the balance block of assembly in the end face of one end of motor rotor, the balance block is above -mentioned balance block.
[0014] The utility model also provides a compressor, including motor rotor and the balance block of assembly in the end face of one side of motor rotor towards the exhaust pipe of compressor, the balance block is above -mentioned balance block.
[0015] The balance block, motor rotor assembly and compressor provided by the utility model have the following beneficial effects:
[0016] By setting the outer side chamfer structure at the intersection area of the windward end face and the radial outer edge ridge of the distal end plane, a notch is formed at the intersection area, which can reduce the pumping effect caused by the rotation of the balance block, reduce the generation of vortex and turbulent flow of refrigerant flow at the area, reduce the pressure difference resistance of the balance block in the rotation process, and reduce the power consumption, operating flow noise and oil discharge rate of the compressor.
[0017] By setting the inner side chamfer structure at the intersection area of the windward end face and the radial inner edge of the distal end plane, the windward end face area can be reduced, that is, the windward area is reduced, the wind resistance during the rotation of the balance block is reduced, and the airflow towards the rotor inner side is guided to a certain extent, which is also beneficial to reduce the pumping effect during the rotation of the balance block;
[0018] Since the cross-sectional area of the airflow guide part becomes smaller and smaller along the circumferential direction away from the balance block body, the airflow guide part objectively forms a tapering structure along the circumferential direction away from the balance block body, which can further reduce the wind resistance during the rotation of the balance block;
[0019] The cross section of the airflow guide part is circular or elliptical, so that the airflow guide part is roughly in the shape of a cone or a circular truncated cone in appearance, which can further reduce the wind resistance during the rotation of the balance block. More importantly, since the tapering structure is formed by the overall appearance of the airflow guide part, after the balance block is assembled on the first end face of the motor rotor, a suspended flow space is formed between the airflow guide part of the balance block and the first end face, which can effectively reduce the pumping effect along the axial direction of the motor rotor during the rotation of the balance block, prevent the disturbance of the pumping effect to the internal flow field of the compressor, reduce the oil discharge rate and the oil discharge amount of the compressor exhaust refrigerant, ensure the sufficient lubrication of the lubricating oil to the internal components of the compressor, and reduce the operating noise of the compressor;
[0020] The inclined intersection lines formed by the two adjacent inclined planes form the outer side chamfer structure and the inner side chamfer structure, respectively. Since the chamfer structure is formed, the purpose of reducing the vortex and turbulence is achieved, the structural features are simpler, the processing difficulty is low, and the processing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating any creative labor.
[0022] Figure 1 is a three-dimensional structure schematic diagram of a balance block in conventional technology, and the arrow in the figure shows the guiding direction of the refrigerant airflow;
[0023] Figure 2 is a three-dimensional structure schematic diagram of a balance block in an embodiment of the present application, and the arrow in the figure shows the guiding direction of the refrigerant airflow, and the outer side chamfer structure shown in the figure is a plane;
[0024] Figure 3is a perspective structural schematic view of the balance block of one embodiment of the utility model, the outer side corner structure shown in the drawing is a curved surface;
[0025] Figure 4 is Figure 3 a top view of the balance block in the figure;
[0026] Figure 5 is a perspective structural schematic view of the balance block of another embodiment of the utility model;
[0027] Figure 6 is Figure 5 a top view of the balance block in the figure;
[0028] Figure 7 is a perspective structural schematic view of another embodiment of the utility model, the windward end and the leeward end in the drawing are curved surfaces that are inclined from the inner end plane to the outer end plane;
[0029] Figure 8 is Figure 7 a top view of the balance block in the figure;
[0030] Figure 9 is a perspective structural schematic view of another embodiment of the utility model;
[0031] Figure 10 is a perspective structural schematic view of another embodiment of the utility model;
[0032] Figure 11 is Figure 10 a left view of the balance block in the figure;
[0033] Figure 12 is a perspective structural schematic view of one embodiment of the utility model;
[0034] Figure 13 is a perspective structural schematic view of one embodiment of the utility model;
[0035] Figure 14 is a perspective structural schematic view of one embodiment of the utility model.
[0036] The reference signs are:
[0037] 1, balance block main body; 11, air flow guide part; 12, connecting hole; 10, outer side corner structure; 101, first transition surface; 102, second transition surface; 103, third transition surface; 20, inner side corner structure. DETAILED DESCRIPTION
[0038] 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 merely illustrative in nature and in no way should be taken as any limitation on the present application and its application or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.
[0039] 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, and in the absence of the opposite description, 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, and therefore 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.
[0040] For the convenience of description, spatial relative terms such as "over", "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 "over" 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 descriptions used herein are interpreted accordingly.
[0041] 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, and therefore cannot be understood as a limitation on the scope of protection of the present application.
[0042] For reference Figures 2 to 14As shown, according to the embodiment of the utility model, provide a balance block, assembled on the first end surface (not shown in the drawing, not cited) of motor rotor (not shown in the drawing, not cited), the balance block includes balance block main body 1, balance block main body 1 extends along the circumference of the motor rotor, balance block main body 1 has the windward end and the leeward end, and balance block main body 1 also has the near end plane (not cited in the drawing, namely Figure 2 The bottom side end surface of the orientation) and the far end plane (not cited in the drawing, namely Figure 2 The top side end surface of the orientation), the intersection area of the windward end face and the radial outer edge edge of the far end plane is formed with the outside chamfer structure 10, so that the aforementioned intersection area position objectively forms a notch towards the rotation axis side of motor rotor, the outside chamfer structure 10 can guide the windward airflow of the windward end, and the aforementioned near end plane can be reliably attached to the motor rotor, and the far end plane can ensure the reliable and stable connection of the connecting hole 12 on the balance block main body 1.
[0043] In the technical scheme, the aforementioned outside chamfer structure 10 is arranged at the intersection area of the windward end face and the radial outer edge edge of the far end plane, so that a notch is formed at the intersection area, which can reduce the pumping effect caused by the rotation of the balance block, reduce the vortex and turbulent flow phenomenon of the refrigerant airflow at the area, reduce the pressure difference resistance of the balance block in the rotation process, and reduce the power consumption, operating airflow noise and oil discharge rate of the compressor.
[0044] The aforementioned balance block main body 1 is formed with the connecting hole 12 penetrating through the opposite two sides, and reliable assembly connection between the balance block and the motor rotor is realized through the connecting hole 12.
[0045] Specifically referring to Figure 5 As shown, in some embodiments, the intersection area of the windward end face and the radial inner edge edge of the far end plane is formed with the inside chamfer structure 20, and the inside chamfer structure 20 can guide the windward airflow of the windward end.
[0046] In the technical scheme, the inside chamfer structure 20 is arranged at the intersection area of the aforementioned windward end face and the radial inner edge edge of the far end plane, which can reduce the windward end face area, i.e. reduce the windward area, reduce the wind resistance in the rotation process of the balance block, and also guide the windward airflow to the inside of the rotor to a certain extent, which is also conducive to reducing the pumping effect in the rotation process of the balance block.
[0047] In some embodiments, specifically referring to Figure 5As shown, the aforementioned outer side cut corner structure 10 and inner side cut corner structure 20 are also formed at the intersection area of the leeward end face of the balance block body 1 and the radial outer edge edge or the radial inner edge edge of the aforementioned distal end plane, so that the balance block in the utility model is applicable to the working condition of bidirectional rotation of the motor rotor.
[0048] In some embodiments, the outer side cut corner structure 10 is a plane (as shown in Figure 2 ) or a curved surface (as shown in Figure 3 ) which is inclined to the side of the rotation axis of the motor rotor in the direction away from the balance block body 1; and / or, the inner side cut corner structure 20 is a plane or a curved surface which is inclined to the side away from the rotation axis of the motor rotor in the direction away from the balance block body 1.
[0049] In the technical scheme, the aforementioned outer side cut corner structure 10 and inner side cut corner structure 20 are designed as a plane or a curved surface, which can simplify the structural design of the balance block and reduce the processing cost.
[0050] Specifically referring to Figure 7 , in some embodiments, the outer side cut corner structure 10 and the inner side cut corner structure 20 are smoothly connected in the radial direction of the balance block body 1, that is, the intersection line between the windward end face and the distal end plane is a smooth structure rather than an edge, which can further reduce the wind resistance.
[0051] In combination with referring to Figures 7 to 11 , in some embodiments, the windward end face has a gas flow guiding part 11 extending along the circumferential direction of the motor rotor, the cross-sectional area of the gas flow guiding part 11 becomes smaller and smaller along the circumferential direction away from the balance block body 1, and the gas flow guiding part 11 is smoothly connected with the windward end face, and the cross section of the aforementioned gas flow guiding part 11 refers to the cross section obtained by sequentially intersecting each radial plane (that is, each axial cross section of the motor rotor) along the circumferential direction of the motor rotor with the gas flow guiding part 11.
[0052] In the technical scheme, since the cross-sectional area of the gas flow guiding part 11 becomes smaller and smaller along the circumferential direction away from the balance block body 1, the gas flow guiding part 11 objectively forms a structure which gradually shrinks along the circumferential direction away from the balance block body 1, which can further reduce the wind resistance of the balance block in the rotation process.
[0053] In a specific embodiment, as shown in Figures 7 to 8 , the aforementioned gas flow guiding part 11 is a structure which gradually shrinks in the direction away from the motor rotor (that is, from the proximal end plane to the distal end plane), so as to guide a part of the refrigerant gas flow to the distal end plane, or it can also beFigure 9 The air flow guide 11 is shown as a quarter of a spherical surface.
[0054] In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. Figure 10 In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. Figure 11 In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section.
[0055] In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section.
[0056] In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section.
[0057] In some embodiments, the air flow guide 11 is shown as a circular or elliptical cross section. Figures 12 to 14As shown, in these embodiments, the balance block body 1 has a radial outer annular surface (not labeled in the figure) and a radial inner annular surface (not labeled in the figure), the windward end surface and the radial outer annular surface are connected by a first transition surface 101, the windward end surface and the radial inner annular surface are connected by a second transition surface 102, the windward end surface and the distal end surface are connected by a third transition surface 103, the first transition surface 101 and the third transition surface 103 form the outer side chamfer structure 10, and the second transition surface 102 and the third transition surface 103 form the inner side chamfer structure 20, in a specific embodiment, the first transition surface 101, the second transition surface 102, and the third transition surface 103 are all inclined planes, the inclined intersection lines formed by adjacent two inclined planes form the outer side chamfer structure 10 and the inner side chamfer structure 20 respectively, and due to the formation of the chamfer structure, the purpose of reducing vortex and turbulence is achieved, the structural features of the technical solution are simpler, the processing difficulty is low, and the processing cost is reduced.
[0058] In some embodiments, as shown in Figure 5 and Figure 6 As shown, the radial outer edge and / or the radial inner edge of the balance block body 1 is rounded, further reducing the sudden change of airflow on the surface of the balance block, thereby reducing the pressure difference resistance in the rotation of the balance block.
[0059] According to the embodiments of the utility model, a motor rotor assembly is further provided, which comprises a motor rotor and a balance block assembled on one end surface of the motor rotor, and the balance block is the above-mentioned balance block.
[0060] According to the embodiments of the utility model, a compressor is further provided, which comprises a motor rotor and a balance block assembled on an end surface of the motor rotor on one side of an exhaust pipe of the compressor, and the balance block is the above-mentioned balance block.
[0061] 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.
[0062] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model. It should be pointed out that, for ordinary skilled in the art, on the premise of not departing from the technical principles of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.
Claims
1. A balance block, characterized by The balance block assembled on the first end face of the motor rotor comprises a balance block body (1) extending along the circumference of the motor rotor, the balance block body (1) has a windward end and a leeward end, and the balance block body (1) also has a proximal end plane close to the motor rotor and a distal end plane away from the motor rotor, an intersection area of the windward end face and a radially outer edge rib edge of the distal end plane is formed with an outer side chamfer structure (10), and the outer side chamfer structure (10) can guide the windward airflow of the windward end.
2. The balance block of claim 1, wherein, An intersection area of the windward end face and a radially inner edge rib edge of the distal end plane is formed with an inner side chamfer structure (20), and the inner side chamfer structure (20) can guide the windward airflow of the windward end.
3. The balance block of claim 2, wherein, The outer side chamfer structure (10) is a plane or a curved surface inclined to the side of the rotation axis of the motor rotor away from the balance block body (1); and / or, the inner side chamfer structure (20) is a plane or a curved surface inclined to the side of the rotation axis of the motor rotor away from the balance block body (1).
4. The balance block of claim 2, wherein, The windward end face has an airflow guide part (11) extending along the circumference of the motor rotor, a cross-sectional area of the airflow guide part (11) becomes smaller and smaller along the circumference away from the balance block body (1), and the airflow guide part (11) is smoothly connected with the windward end face; and / or, the outer side chamfer structure (10) and the inner side chamfer structure (20) are smoothly connected in the radial direction of the balance block body (1).
5. The balance block of claim 4, wherein, The cross section of the airflow guide part (11) is circular or elliptical.
6. The balance block of claim 5, wherein, When the cross section of the airflow guide part (11) is circular or elliptical, the intersection areas of the windward end face and the radially outer edge rib edge and the radially inner edge rib edge of the proximal end plane are respectively formed with the outer side chamfer structure (10) and the inner side chamfer structure (20).
7. The balance block of claim 2, wherein, The balance block body (1) has a radially outer annular surface and a radially inner annular surface, the windward end face and the radially outer annular surface are transitionally connected through a first transition surface (101), the windward end face and the radially inner annular surface are transitionally connected through a second transition surface (102), the windward end face and the distal end plane are transitionally connected through a third transition surface (103), the first transition surface (101) and the third transition surface (103) form the outer side chamfer structure (10), and the second transition surface (102) and the third transition surface (103) form the inner side chamfer structure (20).
8. The balance block according to any one of claims 1 to 7, characterized in that, The radially outer edge rib edge and / or the radially inner edge rib edge of the balance block body (1) is rounded.
9. An electric motor rotor assembly comprising an electric motor rotor and a balance weight assembled to an end face of said electric motor rotor, characterized in that The balance block is the balance block according to any one of claims 1 to 8.
10. A compressor comprising a motor rotor and a balance weight assembled to an end surface of the motor rotor on a side of the motor rotor toward an exhaust pipe of the compressor, characterized by, The balance block is the balance block according to any one of claims 1 to 8.