Balance block, motor rotor assembly and compressor
By setting airflow puncture sections on the balance block, the problem of refrigerant turbulence in the compressor is solved, resulting in noise reduction and lubrication optimization, and improving the compressor's operating efficiency and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-20
AI Technical Summary
The balance block in the existing compressor acts like a fan for the refrigerant during operation, which turbulent the refrigerant flow field, increases noise and oil discharge rate, and poses a risk of insufficient lubrication.
Design a balance block with an airflow piercing section extending circumferentially along the motor rotor. The cross-section gradually increases and expands outward to form a suspended flow space, reducing refrigerant resistance and pumping action, and lowering noise and oil discharge.
It significantly reduces refrigerant airflow resistance, reduces compressor noise and oil discharge rate, ensures sufficient lubrication, and optimizes motor rotor assembly positioning.
Smart Images
Figure CN224021559U_ABST
Abstract
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] The balance block in the compressor in prior art, because its windward area is large, makes the compressor in the operation process, the balance block follows the motor rotor rotation and forms the fan effect, further makes the refrigerant be driven to the radial outside and the axial upside of the balance block and pumps the flow, this stirs up the internal flow field of the compressor, causes the compressor noise phenomenon (the refrigerant airflow and the compressor shell and the motor stator etc. Impact produce) aggravation, under the pumping effect of the balance block still aggravates the oil discharge rate and oil discharge volume of the compressor exhaust refrigerant, makes the lubrication in the compressor exist the risk of the risk of deficiency. SUMMARY
[0003] Therefore, the utility model provides a balance block, motor rotor subassembly and compressor, can overcome the balance block on the motor rotor in the related art in the operation process of compressor to the refrigerant in the compressor forms the fan effect, makes the refrigerant produce pumping flow to the outside and upward, stirs up the internal flow field of the compressor, causes the compressor noise phenomenon aggravation, aggravates the oil discharge rate and oil discharge volume of the compressor exhaust refrigerant, makes the lubrication in the compressor exist the risk of the risk of deficiency.
[0004] In order to solve the above problem, the utility model provides a balance block, assembles on the first end face of motor rotor, the balance block includes balance block main part, the balance block main part extends along the circumference of the motor rotor, the balance block main part has windward end and leeward end, at least the windward end has the airflow puncture portion extending along the circumference of the motor rotor, the airflow puncture portion includes the distal end away from the balance block main part and the proximal end close to the balance block main part, the cross section area of the airflow puncture portion gradually increases from the distal end to the proximal end, and the airflow puncture portion gradually expands outward along the direction from the distal end to the proximal end.
[0005] In some embodiments, the airflow puncture portion has a free end away from the balance block main part, and the free end has a point end; or, the airflow puncture portion has a free end away from the balance block main part, and the free end has a vertical plane end, and the plane is coplanar with one of the axial cross sections of the motor rotor.
[0006] In some embodiments, the area of the end plane of the free end is Sd, and 0.5mm2≤Sd≤9mm 2 .
[0007] In some embodiments, the balance block body is circular ring-shaped, and a cross-sectional area of the balance block body is S, and Sd≤S / 4.
[0008] In some embodiments, any cross-section of a portion of the airflow piercing part other than the piercing free end thereof is circular or elliptical.
[0009] In some embodiments, the airflow piercing part and the balance block body are smoothly connected via a transition section.
[0010] In some embodiments, the balance block body is a circular ring section extending along an axial direction of the motor rotor, and a cross-section of the balance block body is rectangular, and an axial height of the rectangle is less than a radial thickness thereof, the transition section has an elliptical shape and a quadrilateral rounded rectangle in sequence along a cross-section close to a circumference of the balance block body, and the elliptical shape and the quadrilateral rounded rectangle smoothly transition at connecting positions of the airflow piercing part and the balance block body, respectively; and / or, the airflow piercing part, the transition section, and the balance block body are integrally formed.
[0011] In some embodiments, a line connecting geometric centers of each cross-section of the airflow piercing part coincides with a geometric center line of the balance block body.
[0012] The utility model also provides a motor rotor assembly, including motor rotor and the balance block of assembly on one end face of motor rotor, balance block is above-mentioned balance block.
[0013] The utility model also provides a compressor, including motor rotor and the balance block of assembly on the end face of one side of motor rotor towards the exhaust pipe of compressor, balance block is above-mentioned balance block.
[0014] The balance block, the motor rotor assembly and the compressor provided by the utility model have the following beneficial effects:
[0015] Because the airflow piercing part with gradually changing cross-section and outwardly expanding around is arranged on the windward end of the balance block body, on one hand, the airflow piercing part can significantly reduce the resistance of refrigerant airflow during rotation of the motor rotor, thereby reducing the power consumption of the compressor using the airflow piercing part, and on the other hand, because the airflow piercing part has the structure of outwardly expanding around, after the airflow piercing part is assembled with the motor rotor, a suspended flow space is objectively formed between the airflow piercing part and the first end face of the motor rotor, which can effectively reduce the pumping effect along the axial direction of the motor rotor during rotation of the balance block, prevent disturbance to the flow field inside the compressor due to the pumping effect, reduce the oil discharge rate and the oil discharge amount of the exhaust refrigerant of the compressor, ensure sufficient lubrication of the lubricating oil to the internal components of the compressor, and reduce the operating noise of the compressor.
[0016] The piercing free end of the airflow piercing part is a pointed corner structure of a point, which can make the piercing part have a very small windward area, and can guide the refrigerant airflow to flow around along the gradually expanding smooth outer circumferential surface after the refrigerant airflow is pierced, further reducing the wind resistance of the balance block;
[0017] By designing the Sd to be between 0.5mm2 and 9mm2, a positioning surface with reasonable area size and bearing capacity can be provided, and the positioning surface is objectively arranged at the first end surface of the motor rotor, so that the motor rotor can be positioned in the circumferential direction by the balance block during the magnetizing process or the assembling process by using a smaller cross-sectional area.
[0018] The smooth transition connection between the airflow piercing part with a circular cross section and the balance block main body with a rectangular cross section is realized by the oval shape and the rectangular shape with rounded corners, further reducing the wind resistance of the balance block. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. 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 creative labor.
[0020] Figure 1 is a structural diagram of a balance block in the related art;
[0021] Figure 2 is a three-dimensional structural diagram of a balance block in an embodiment of the present application;
[0022] Figure 3 is Figure 2 a left view of
[0023] Figure 4 is Figure 2 a top view of
[0024] Figure 5 is Figure 4 a cross-sectional position diagram of the balance block in
[0025] Figure 6 is Figure 5 a cross-sectional diagram of A-A in
[0026] Figure 7 is Figure 4 a cross-sectional position diagram of B-B of the balance block in
[0027] Figure 8 is Figure 7A cross-sectional schematic diagram of BB;
[0028] Figure 9 yes Figure 4 A schematic diagram of the cross-sectional position of the CC of the balance block in the diagram;
[0029] Figure 10 yes Figure 9 A cross-sectional schematic diagram of CC;
[0030] Figure 11 yes Figure 4 A schematic diagram of the cross-sectional position of the DD of the balance block in the diagram;
[0031] Figure 12 yes Figure 11 Schematic diagram of the cross section of DD;
[0032] Figure 13 yes Figure 4 A schematic diagram of the cross-sectional position of the EE of the balance block in the diagram;
[0033] Figure 14 yes Figure 13 A cross-sectional diagram of the EE;
[0034] Figure 15 This is a schematic diagram of a three-dimensional structure of a balance block in related technologies.
[0035] The attached figures are labeled as follows:
[0036] 1. Balance block body; 11. Airflow puncture section; 12. Connecting hole. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0038] 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.
[0039] 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.
[0040] 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.
[0041] For reference Figures 2 to 15As shown, according to the embodiment of the utility model, provide a balance block, assembled on the first end surface (not shown in the drawing) of motor rotor (not shown in the drawing), the first end surface is the end surface of the side of motor rotor close to compressor exhaust port (not shown in the drawing), the balance block includes balance block main body 1, balance block main body 1 extends along the circumferential direction (also namely circumferential direction) of motor rotor, balance block main body 1 has windward end (not marked in the drawing) and leeward end (not marked in the drawing), at least windward end has airflow piercing part 11 extending along the circumferential direction of motor rotor, in a preferred embodiment, windward end and leeward end are all provided with the aforementioned airflow piercing part 11, so that the balance block can be applied to the working condition of motor rotor bidirectional rotation, airflow piercing part 11 includes the distal end (not marked in the drawing) away from balance block main body 1 and the proximal end (not marked in the drawing) close to balance block main body 1, the cross-sectional area of airflow piercing part 11 gradually increases (smoothly increases) from the distal end to the proximal end, and airflow piercing part 11 gradually expands outward along the direction from the distal end to the proximal end (for example, when airflow piercing part 11 is a cone, the aforementioned four directions are also the four directions of the radial outward direction of each cross section of the cone), the cross section of the aforementioned airflow piercing part 11 refers to the cross section obtained by the intersection of each radial plane (also namely the axial cross section of motor rotor) along the circumferential direction of motor rotor and airflow piercing part 11. The connecting hole 12 is formed in the balance block main body 1 and penetrates the opposite sides, and reliable assembly connection between the balance block and the motor rotor is realized through the connecting hole 12.
[0042] In the technical scheme, the airflow piercing part 11 with gradually changing cross section and outward expanding four directions is arranged on the windward end of the balance block main body 1, which can significantly reduce the resistance of refrigerant airflow during the rotation of the motor rotor, thereby reducing the power consumption of the compressor applied thereto, and on the other hand, since the airflow piercing part 11 has the structure of outward expanding four directions, a suspended flow space is objectively formed between the airflow piercing part 11 and the first end surface of the motor rotor after assembly, 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 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.
[0043] In some embodiments, the airflow piercing part 11 has a piercing free end away from the balance block main body 1, and the end of the piercing free end is a point, that is, the airflow piercing part 11 objectively has a structure with a free end of a sharp corner.
[0044] In this technical solution, the free end of the airflow puncture part 11 is a pointed structure, which enables it to have a very small windward area and to guide the refrigerant airflow along its gradually expanding smooth outer periphery after puncturing it, thereby further reducing the wind resistance of the balance block.
[0045] In other embodiments, the airflow puncture portion 11 has an end away from the balance block body 1 as a puncture free end, and the end of the puncture free end is a vertical plane. In one specific embodiment, this plane is coplanar with one of the axial sections of the motor rotor. In some embodiments, the area of the end plane of the puncture free end is Sd, where 0.5 mm² ≤ Sd ≤ 9 mm². When S... min Reaching 0.5mm 2 When the above conditions are met, incoming material inspection of the balance block and tooling alignment can be easily achieved, while when S min >9mm 2 At this time, it will lead to excessive wind resistance.
[0046] In this technical solution, by designing Sd to be between 0.5mm2 and 9mm2, a positioning surface with a reasonable area and load-bearing capacity can be provided. At the same time, since this positioning surface is objectively set at the first end face of the motor rotor, a smaller cross-sectional area can be used to achieve circumferential positioning of the motor rotor by the balance block during the magnetization process or assembly process.
[0047] Specifically, during the assembly and magnetization process of the motor rotor (assembly), a balance block is needed for positioning and fixation. However, the corresponding positioning fixture cannot be accurately positioned on the inclined surface. In the prior art, the axial thickness of the end face where the balance block mates with the aforementioned first end face of the motor rotor is usually increased (see...). Figure 15 As shown in the figure, in order to ensure that the aforementioned positioning fixture accurately aligns the balance block, and at the same time avoid the fixture and the balance block from shifting, this would undoubtedly lead to the cross-sectional area of the end face of the balance block at the windward end and / or the leeward end being too large, which would result in the phenomenon of excessive air resistance of the refrigerant flow. However, the aforementioned positioning surface in this application is suspended, so even if the cross-sectional area is small (i.e., it does not need to be too large), the fixture can accurately position and align it.
[0048] In some embodiments, the balance block body 1 is annular, and the cross-sectional area of the balance block body 1 is S (that is, the cross-section on each shaft section of the motor rotor), Sd≤S / 4, so that the size of the free end of the airflow piercing part 11 can match the cross-sectional area of the balance block body 1, ensuring effective piercing and guidance of the refrigerant airflow, thereby reducing the flow resistance of the refrigerant airflow and reducing compressor noise.
[0049] In some embodiments, any cross section of the part of the airflow piercing portion 11 other than the piercing free end thereof is circular or elliptical, and the airflow piercing portion 11 and the balance block body 1 are connected smoothly via the transition section to ensure smooth guidance of the refrigerant airflow to the surroundings thereof.
[0050] In some embodiments, the balance block body 1 is a circular ring section extending along the axial direction of the motor rotor, and the cross section of the balance block body 1 is rectangular, and the axial height of the rectangle is smaller than the radial thickness thereof, so that the balance block body 1 is a flat structure as a whole, facilitating reliable and stable connection with the motor rotor, and the cross section of the transition section along the circumferential direction close to the balance block body 1 is elliptical and quadrangularly rounded rectangular in sequence, and the elliptical and quadrangularly rounded rectangular are smoothly connected with the airflow piercing portion 11 and the balance block body 1 respectively.
[0051] Specifically referring to Figures 5 to 14 As shown, the shape of each cross section changes in sequence as circular, elliptical, quadrangularly rounded rectangular and rectangular along the direction from the end of the airflow piercing portion 11 away from the balance block body 1 to close to the balance block body 1, so that the airflow piercing portion 11 with circular cross section and the balance block body 1 with rectangular cross section are smoothly connected through the elliptical and quadrangularly rounded rectangular, further reducing the wind resistance of the balance block.
[0052] In some embodiments, the airflow piercing portion 11, the transition section and the balance block body 1 are integrally formed, and the integral formation is specifically realized by machining, injection molding and post-milling, etc.
[0053] In the technical solution, the balance block body 1 and the airflow piercing portion 11 are formed as an organic whole by integral formation, which can simplify the manufacturing process of the balance block and the assembly process.
[0054] In some embodiments, the line connecting the geometric centers of each cross section of the airflow piercing portion 11 coincides with the geometric center line of the balance block body 1, and when the cross section of the balance block body 1 is rectangular, the geometric center line is also the equal-thickness line of the balance block body 1.
[0055] In the technical solution, uniform transition in all directions can be realized, so as to avoid the situation that the wind resistance of the balance block is too large due to the excessive inclination angle in a single direction. It can be understood that the airflow piercing portion 11 is objectively a central rotational symmetric structure at this time, which can utilize the reverse characteristics of the symmetric flow direction to the left and right to achieve the maximum degree of prevention of the axial pumping effect, and also can reduce the axial force applied to the motor shaft during the rotation of the balance block to a certain extent.
[0056] According to an embodiment of the present invention, a motor rotor assembly is also provided, including a motor rotor and a balance block assembled on one end face of the motor rotor, wherein the balance block is the balance block described above.
[0057] According to an embodiment of the present invention, a compressor is also provided, including a motor rotor and a balance block assembled on the end face of the motor rotor facing the exhaust pipe side of the compressor, wherein the balance block is the balance block described above.
[0058] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.
[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A balance block, characterized in that, Assembled on the first end face of the motor rotor, the balance block includes a balance block body (1) extending circumferentially along the motor rotor. The balance block body (1) has a windward end and a leeward end. At least the windward end has an airflow puncture portion (11) extending circumferentially along the motor rotor. The airflow puncture portion (11) includes a distal end away from the balance block body (1) and a proximal end close to the balance block body (1). The cross-sectional area of the airflow puncture portion (11) gradually increases from the distal end to the proximal end, and the airflow puncture portion (11) gradually expands outward in the direction from the distal end to the proximal end.
2. The balance block according to claim 1, characterized in that, The airflow piercing part (11) has one end away from the balance block body (1) as a piercing free end, and the end of the piercing free end is a point; or, the airflow piercing part (11) has one end away from the balance block body (1) as a piercing free end, and the end of the piercing free end is a vertical plane.
3. The balance block according to claim 2, characterized in that, The area of the end plane of the punctured free end is Sd, where 0.5mm2≤Sd≤9mm2.
4. The balance block according to claim 3, characterized in that, The main body (1) of the balance block is circular, and the cross-sectional area of the main body (1) is S, where Sd≤S / 4.
5. The balance block according to claim 2, characterized in that, The cross-section of any part of the airflow puncture section (11), except for its puncture free end, is circular or elliptical.
6. The balance block according to claim 5, characterized in that, The airflow puncture section (11) and the balance block body (1) are smoothly connected via a transition section.
7. The balance block according to claim 6, characterized in that, The balance block body (1) is an annular segment extending along the axial direction of the motor rotor, and the cross-section of the balance block body (1) is rectangular. The cross-section of the transition segment along the circumferential direction close to the balance block body (1) is successively elliptical and rectangular with rounded corners. The elliptical and rectangular with rounded corners smoothly transition to the connection position of the airflow piercing part (11) and the balance block body (1); and / or, the airflow piercing part (11), the transition segment and the balance block body (1) are integrally formed.
8. The balance block according to claim 7, characterized in that, The line connecting the geometric centers of each cross section of the airflow puncture part (11) coincides with the geometric center line of the balance block body (1).
9. A motor rotor assembly, comprising a motor rotor and a counterweight assembled on one end face of the 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 counterweight assembled on an end face of the motor rotor facing the discharge pipe side of the compressor, characterized in that, The balance block is the balance block according to any one of claims 1 to 8.