Motor rotor assembly and compressor
By setting airflow guides and shielding parts on the motor rotor balance block, the pumping effect on refrigerant airflow during the balance block rotation is solved, reducing compressor power consumption, oil discharge rate and noise, and improving internal airflow stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-27
AI Technical Summary
The balance block on the motor rotor in the compressor pumps the refrigerant flow during rotation, resulting in large airflow disturbances, high power consumption, high oil discharge rate, and high noise levels inside the compressor.
An airflow guide and a shield are installed on the balance block of the motor rotor. The airflow guide has an airflow guiding surface, and the shield is set on the pumping path to block or obstruct the refrigerant airflow and reduce the pumping effect.
It reduces the disturbance to the airflow inside the compressor during the rotation of the balance block, reduces eddies and turbulence, lowers compressor power consumption, oil discharge rate and operating noise, and ensures sufficient lubrication by the lubricating oil.
Smart Images
Figure CN224054028U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to compressor design technical field, concretely relates to a 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, increasing the wind resistance of the compressor, generating additional noise, etc. Figure 1 As shown in the example, it is a conventional balance block structure, the windward end is a plane structure, and the balance block rotates with the motor rotor during the operation of the compressor, which can generate relatively large wind resistance, disturb the airflow in the compressor, increase the oil discharge rate of the compressor, and generate additional noise. In order to reduce the rotating wind resistance of the balance block, in some related technologies, a corresponding gradual change structure is arranged at the aforementioned windward end plane, so as to realize the flow guiding effect on the refrigerant airflow and reduce the wind resistance of the balance block, but the gradual change structure can pump the refrigerant in the compressor, thereby causing the refrigerant in the compressor to run in a certain direction or multiple directions, disturbing the flow field in the compressor, and having a certain uncontrollable influence on the oil discharge rate of the compressor, and also increasing the power consumption of the compressor to a certain extent. SUMMARY
[0003] Therefore, the utility model provides a motor rotor subassembly and compressor, which can overcome the technical problems that the balance block on the motor rotor in the related art has a pumping effect on the refrigerant airflow during rotation, greatly disturbs the airflow in the compressor, and relatively increases the power consumption, oil discharge rate and operating noise of the compressor.
[0004] In order to solve the above problems, the utility model provides a motor rotor subassembly, which comprises a motor rotor and a balance block assembled on the first end face of the motor rotor, the balance block comprises a balance block main body, the balance block main body extends along the circumference of the motor rotor, the balance block main body has a windward end and a leeward end, the windward end has an airflow guide part extending along the circumference of the motor rotor, the airflow guide part has an airflow guide surface, the motor rotor subassembly further comprises a shielding piece, the airflow guide surface can form a pumping thrust on the refrigerant airflow in contact therewith, and the shielding piece is arranged on at least part of the pumping path of the airflow guide surface to the refrigerant airflow.
[0005] In some embodiments, the airflow guide surface has a top side pumping thrust area away from the first end face, and the shielding piece is a shielding end plate assembled on the distal end plane of the balance block main body.
[0006] In some embodiments, the blocking end plate is a circular ring, and an outer diameter of the circular ring is not greater than an outer ring surface diameter of the balance block body, and an inner diameter of the circular ring is not less than an inner ring surface diameter of the balance block body.
[0007] In some embodiments, a cross-sectional area of the airflow guide portion is smaller and smaller along a circumferential direction away from the balance block body.
[0008] In some embodiments, a cross-section of the airflow guide portion is circular or elliptical.
[0009] In some embodiments, the airflow guide surface has an outer side pumping thrust area on a radially outer side surface of the airflow guide portion, and a radially inner side surface of the airflow guide portion is on the same cylindrical surface as a radially inner ring surface of the balance block body, and the blocking member is a circular ring on a radially outer side or a radially inner side of the balance block body.
[0010] In some embodiments, the airflow guide surface has an inner side pumping thrust area on a radially inner side surface of the airflow guide portion, and a radially outer side surface of the airflow guide portion is on the same cylindrical surface as a radially outer ring surface of the balance block body, and the blocking member is a circular ring on a radially outer side or a radially inner side of the balance block body.
[0011] In some embodiments, the motor rotor has a rotor end plate on a first end surface thereof, and the circular ring is on a side of the rotor end plate away from the first end surface.
[0012] In some embodiments, the circular ring is integrally formed with the rotor end plate.
[0013] The utility model also provides a kind of compressor comprising above motor rotor assembly.
[0014] The motor rotor assembly and the compressor provided by the utility model have the following beneficial effects:
[0015] By arranging the blocking member on the pumping path of the refrigerant airflow generated by the airflow guide surface of the airflow guide portion, the pumped airflow during the rotation of the balance block can be at least partially blocked, thereby at least achieving the purpose of reducing the pumping effect during the rotation of the balance block. This can reduce the disturbance of the balance block to the airflow inside the compressor during rotation, reduce the vortex and turbulent flow of the refrigerant airflow, and thereby reduce the power consumption, oil discharge rate and operating noise of the compressor.
[0016] The cross-sectional area of the airflow guide gradually decreases along the circumference away from the main body of the balance block, thus forming an approximately conical (or frustum-shaped) structure. When the balance block is assembled on the first end face, a suspended flow space is formed between the airflow guide and the first end face, which can further reduce the pumping action along the axial direction of the motor rotor during the rotation of the balance block. This effectively prevents the pumping action from disturbing the internal flow field of the compressor, reducing the operating noise of the compressor, and reducing the oil discharge rate and amount of the compressor exhaust refrigerant, ensuring sufficient lubrication of the internal components of the compressor by the lubricating oil.
[0017] By setting the aforementioned ring on the inner or outer side of the outer pumping thrust area on the balance block, airflow obstruction can be formed in the source (inner side) or destination (outer side) area of the pumping path, thereby reducing the adverse effects of the pumping action of the balance block, that is, reducing the compressor's operating power consumption, oil discharge rate and operating noise.
[0018] By setting the aforementioned ring on the inner or outer side of the outer pumping thrust area on the balance block, airflow obstruction can be formed in the source (outer side) or destination (inner side) area of the pumping path, thereby reducing the adverse effects of the pumping action of the balance block, that is, reducing the compressor's operating power consumption, oil discharge rate and operating noise. Attached Figure Description
[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of a balance block in conventional technology;
[0021] Figure 2 This is a three-dimensional structural schematic diagram of a motor rotor assembly according to an embodiment of the present invention;
[0022] Figure 3 yes Figure 2 A three-dimensional structural diagram of the motor rotor assembly from another perspective;
[0023] Figure 4 This is a three-dimensional structural schematic diagram of a motor rotor assembly according to another embodiment of the present invention;
[0024] Figure 5 yes Figure 4 A three-dimensional structural diagram of the motor rotor assembly from another perspective;
[0025] Figure 6 is a three-dimensional structure schematic diagram of the motor rotor assembly of another embodiment of the utility model, the circular ring in the drawing is at the upstream side of the pump delivery path;
[0026] Figure 7 is a structure exploded schematic view of part components in Figure 6
[0027] Figure 8 is a three-dimensional structure schematic diagram of the motor rotor assembly of another embodiment of the utility model, the circular ring in the drawing is at the downstream side of the pump delivery path;
[0028] Figure 9 is a structure exploded schematic view of part components in Figure 8
[0029] Figure 10 is a three-dimensional structure schematic diagram of the motor rotor assembly of another embodiment of the utility model, the circular ring in the drawing is at the downstream side of the pump delivery path;
[0030] Figure 11 is a structure exploded schematic view of part components in Figure 10
[0031] Figure 12 is a three-dimensional structure schematic diagram of the motor rotor assembly of another embodiment of the utility model, the circular ring in the drawing is at the upstream side of the pump delivery path;
[0032] Figure 13 is a structure exploded schematic view of part components in Figure 12
[0033] the reference signs are:
[0034] 1, balance block main body;11, air flow guide part;111, air flow guide surface;12, connecting hole;2, shielding piece;100, balance block;200, motor rotor;201, rotor end plate. DETAILED DESCRIPTION
[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, 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 utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0036] In the description of the utility model, it is understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship is usually based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the restriction of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.
[0037] For the convenience of description, spatial relative terms can be used here, such as '' above '' '' above '' '' upper surface '' '' upper '' and the like, to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing. 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 drawing. For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' 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 here is interpreted accordingly.
[0038] In addition, it should be noted that the use of '' first '' '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore can not be understood as the restriction of the protection scope of the utility model.
[0039] For reference Figures 2 to 13As shown, according to an embodiment of the present invention, a motor rotor assembly is provided, including a motor rotor 200 and a balance block 100 assembled on a first end face (not labeled) of the motor rotor 200. The balance block 100 includes a balance block body 1, which extends circumferentially along the motor rotor. The balance block body 1 has a windward end (not labeled) and a leeward end (not labeled). The windward end has an airflow guiding portion 11 extending circumferentially along the motor rotor. The airflow guiding portion 11 has an airflow guiding surface 111. The motor rotor assembly also includes a shielding member 2. The airflow guiding surface 111 can... The shielding member 2 is positioned on at least a portion of the pumping path of the refrigerant airflow through the airflow guiding surface 111. That is, the shielding member 2 is positioned in at least a portion of the pumping path of the refrigerant airflow, thereby obstructing at least a portion of the pumped airflow and thus at least reducing the pumping effect during the rotation of the balance block. Of course, in some embodiments, the shielding member 2 can be positioned entirely on the pumping path, thereby blocking the flow of the pumped refrigerant airflow from its source or destination.
[0040] In this technical solution, by setting a shielding member 2 on the pumping path of the refrigerant airflow on the airflow guiding surface 111 of the airflow guiding part 11, the airflow pumped during the rotation of the balance block can be blocked at least partially, thereby at least reducing the pumping effect during the rotation of the balance block. This can reduce the disturbance of the airflow inside the compressor by the balance block during the rotation, reduce the eddy current and turbulence of the refrigerant airflow, and thus reduce the compressor power consumption, oil discharge rate and operating noise.
[0041] For details, please refer to [link / reference]. Figures 2 to 5 As shown, in some embodiments, the airflow guiding surface 111 has a top-side pumping thrust region away from the first end face, and the shielding member 2 is a shielding end plate assembled on the far-end plane of the balance block body 1.
[0042] Specifically, such as Figure 2 and Figure 3 As shown, the airflow guiding surface 111 is an inclined curved surface (specifically an inclined arc surface) that gradually approaches the first end face along the circumferential direction away from the main body 1 of the balance block. At this time, its top surface forms a pumping thrust area, thereby causing it to pump the refrigerant airflow in contact with it along the axial direction of the motor rotor 200 away from the first end face. At this time, since the aforementioned shielding end plate is located downstream of the pumping path of this pumping action, the pumping effect on the refrigerant airflow during the rotation of the balance block is reduced.
[0043] In such Figure 4and Figure 5 As shown, the cross-sectional area of the airflow guide part 11 is getting smaller along the circumferential direction of the balance block body 1, so that the airflow guide part 11 objectively forms a structure similar to a cone (or a truncated cone). The cross-section of the airflow guide part 11 specifically refers to the cross-section obtained by the intersection of each radial plane (i.e. each axial cross-section of the motor rotor) along the circumferential direction of the motor rotor. When the balance block is assembled on the first end surface, the airflow guide part 11 and the first end surface objectively form an over-flow space, which can further reduce the pumping effect along the axial direction of the motor rotor during rotation of the balance block, effectively prevent disturbance of the internal flow field of the compressor due to the pumping effect, reduce the noise of the compressor, reduce the oil discharge rate and oil discharge amount of the compressor, and ensure sufficient lubrication of the internal components of the compressor.
[0044] In a specific embodiment, the cross-section of the airflow guide part 11 is circular or elliptical, so that the airflow guide surface 111 is a smooth curved surface (specifically a circular arc surface), which has smaller wind resistance. It should be particularly noted that the airflow guide surface 111 objectively forms a full circumferential pumping thrust surface extending around the axial direction. The top side region of the airflow guide surface 111 is opposite to the bottom side region, and the radially inner side region is opposite to the radially outer side region. In terms of pumping effect, the radially inner side region and the radially outer side region are approximately balanced in the radial direction of the motor rotor, so that the aforementioned shielding member 2 does not need to be provided on the radially inner side region and the radially outer side region of the balance block. The bottom side region of the top side region is opposite to the first end surface of the motor rotor, and the first end surface of the motor rotor reduces the pumping effect on the bottom side region to a certain extent, and the top side region reduces the pumping effect on the top side region to the top through the aforementioned shielding member 2.
[0045] In some embodiments, the shielding end plate is circular ring-shaped, and the outer diameter of the circular ring-shaped is not greater than the outer annular surface diameter of the balance block body 1, and the inner diameter of the circular ring-shaped is not less than the inner annular surface diameter of the balance block body 1. This can reduce the hindrance to the airflow passage on the motor rotor during operation of the balance block, and ensure smoothness of the airflow passage. It should be understood that the inner diameter of the circular ring-shaped is also greater than the center hole of the rotating shaft of the motor rotor.
[0046] For a more complete understanding of the present application, reference is made to the following Figures 6 to 9As shown, in some embodiments, the gas flow guide surface 111 has an outer side pumping thrust area on the radially outer side surface of the gas flow guide portion 11, and the radially inner side surface of the gas flow guide portion 11 is on the same cylindrical surface as the radially inner annular surface of the balance block body 1, that is, the gas flow guide portion 11 at this time is objectively a tilted curved surface (for example, a tilted circular arc surface) portion of the radially outer annular surface of the balance block body 1 that is close to the side of the rotation center of the motor rotor, and the shielding piece 2 is a circular ring on the radially outer side or the radially inner side of the balance block body 1. When the shielding piece 2 is on the radially outer side of the balance block body 1, the shielding piece 2 is arranged on the downstream side of the pumping path, and when the shielding piece 2 is on the radially inner side of the balance block body 1, the shielding piece 2 is arranged on the upstream side of the pumping path. It can be understood that, since the radially inner side surface of the gas flow guide portion 11 is on the same cylindrical surface as the radially inner annular surface of the balance block body 1, the radially inner side surface of the gas flow guide portion 11 does not form a pumping thrust on the refrigerant gas flow in contact therewith during the rotation of the balance block.
[0047] In this technical solution, by arranging the aforementioned circular ring on the inner side or the outer side of the outer side pumping thrust area of the balance block, the source (inner side) or the destination (outer side) area of the pumping path can be blocked to reduce the adverse effects of the pumping effect of the balance block, that is, to reduce the operating power consumption, oil discharge rate and operating noise of the compressor.
[0048] For a more complete understanding of the present application, reference is made to the following detailed description taken in conjunction with the accompanying drawings. Figures 10 to 13 As shown, in some embodiments, the gas flow guide surface 111 has an outer side pumping thrust area on the radially outer side surface of the gas flow guide portion 11, and the radially inner side surface of the gas flow guide portion 11 is on the same cylindrical surface as the radially inner annular surface of the balance block body 1, that is, the gas flow guide portion 11 at this time is objectively a tilted curved surface (for example, a tilted circular arc surface) portion of the radially outer annular surface of the balance block body 1 that is close to the side of the rotation center of the motor rotor, and the shielding piece 2 is a circular ring on the radially outer side or the radially inner side of the balance block body 1. When the shielding piece 2 is on the radially outer side of the balance block body 1, the shielding piece 2 is arranged on the downstream side of the pumping path, and when the shielding piece 2 is on the radially inner side of the balance block body 1, the shielding piece 2 is arranged on the upstream side of the pumping path. It can be understood that, since the radially inner side surface of the gas flow guide portion 11 is on the same cylindrical surface as the radially inner annular surface of the balance block body 1, the radially inner side surface of the gas flow guide portion 11 does not form a pumping thrust on the refrigerant gas flow in contact therewith during the rotation of the balance block.
[0049] In the technical scheme, the circular ring is arranged on the inner side or the outer side of the outer pump thrust area of the balance block, so that the air flow barrier is formed in the source (when the outer side) or the destination (when the inner side) area of the pump path, and the disadvantage caused by the pumping effect of the balance block is reduced, that is, the operation power consumption, the oil discharge rate and the operation noise of the compressor are reduced.
[0050] In some embodiments, the first end surface of the motor rotor has a rotor end plate 201, and the circular ring is arranged on the side of the rotor end plate 201 away from the first end surface, for example, the circular ring is connected with the rotor end plate 201 in a welded manner, or the circular ring is integrally formed with the rotor end plate 201, so that the number of components is reduced and the assembly efficiency is improved.
[0051] According to the embodiments of the utility model, a compressor is also provided, which comprises the motor rotor assembly.
[0052] Those skilled in the art can understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.
[0053] The above is only the preferred embodiment of the utility model, and is not used to 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 principle 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. An electric machine rotor assembly, characterized by, The motor rotor (200) and the balance block (100) assembled on the first end surface of the motor rotor (200) are provided, the balance block (100) 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, the windward end is provided with an airflow guide part (11) extending along the circumference of the motor rotor, the airflow guide part (11) has an airflow guide surface (111), the motor rotor assembly further comprises a shielding piece (2), the airflow guide surface (111) can form a pumping thrust on the refrigerant airflow in contact therewith, and the shielding piece (2) is arranged on at least part of the pumping path of the airflow guide surface (111) to the refrigerant airflow.
2. The electric machine rotor assembly of claim 1, wherein, The airflow guide surface (111) has a top-side pumping thrust area facing away from the first end surface, and the shielding end plate is assembled on the distal end surface of the balance block body (1).
3. The electric machine rotor assembly of claim 2, wherein, The shielding end plate is a circular ring, and the outer diameter of the circular ring is not greater than the outer ring surface diameter of the balance block body (1), and the inner diameter of the circular ring is not less than the inner ring surface diameter of the balance block body (1).
4. The electric machine rotor assembly of claim 2, wherein, The cross-sectional area of the airflow guide part (11) becomes smaller and smaller along the circumference away from the balance block body (1).
5. The electric machine rotor assembly of claim 4, wherein, The cross section of the airflow guide part (11) is circular or elliptical.
6. The electric machine rotor assembly of claim 1, wherein, The airflow guide surface (111) has an outside pumping thrust area on the radially outer side of the airflow guide part (11), and the radially inner side of the airflow guide part (11) is on the same cylindrical surface as the radially inner ring surface of the balance block body (1), and the shielding piece (2) is a circular ring on the radially outer side or the radially inner side of the balance block body (1).
7. The electric machine rotor assembly of claim 1, wherein, The airflow guide surface (111) has an inside pumping thrust area on the radially inner side of the airflow guide part (11), and the radially outer side of the airflow guide part (11) is on the same cylindrical surface as the radially outer ring surface of the balance block body (1), and the shielding piece (2) is a circular ring on the radially outer side or the radially inner side of the balance block body (1).
8. An electric machine rotor assembly according to claim 6 or 7, characterized in that The motor rotor has a rotor end plate (201) on the first end surface, and the circular ring is on the side of the rotor end plate (201) away from the first end surface.
9. The electric machine rotor assembly of claim 8, wherein, The circular ring is integrally formed with the rotor end plate (201).
10. A compressor characterized by, The motor rotor assembly comprises the motor rotor assembly according to any one of claims 1 to 9.