Rotor end plate, motor, compressor and refrigeration equipment

Abstract

The invention discloses a rotor end plate, a motor, a compressor and refrigeration equipment, the rotor end plate is provided with a first plate surface facing the end part of a rotor iron core and a second plate surface opposite to the first plate surface, the rotor end plate is provided with a plurality of rivet holes arranged at intervals along the circumferential direction, and the rivet holes are provided with rivet holes. And at least one riveting reinforcing pit is formed between at least two adjacent rivet holes in the second plate surface. According to the technical scheme, the rigidity of the rotor assembly is improved, the rotor machining quality is improved, and then the performance indexes such as noise and vibration of a motor and a compressor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor assembly, a motor, a compressor and a refrigeration device. Background Art

[0002] With social progress and economic development, people's living standards have significantly improved. When purchasing refrigeration equipment such as air conditioners and refrigerators, consumers are not only concerned about price but also about noise. The compressor is a core component of refrigerators and air conditioners, while the motor is the compressor's power output. The vibration and noise of the motor directly affect the vibration and noise levels of refrigerators, air conditioners, and other refrigeration equipment. Therefore, reducing compressor vibration and noise is a current challenge for those skilled in the art. Summary of the Invention

[0003] The main purpose of the present invention is to provide a rotor assembly, which aims to improve the installation structure of the rotor end plate of the motor, enhance the overall structural stability, prevent loosening or falling off during operation, and thus reduce motor vibration and noise.

[0004] To achieve the above-mentioned objectives, the present invention proposes a rotor end plate, which is installed at the axial end of the rotor core of the motor. The rotor end plate has a first plate surface facing the end of the rotor core, and a second plate surface opposite to the first plate surface. The rotor end plate is provided with a plurality of rivet holes arranged at intervals along the circumferential direction, and at least one riveted reinforcement pit is provided on the second plate surface between at least two adjacent rivet holes.

[0005] Optionally, the thickness of the rotor end plate is d, the recessed depth of the riveted reinforcement pit is h, and h satisfies: h≥0.1 mm, and / or h≤d / 2.

[0006] Optionally, a reference circle is defined with the center of the rotor end plate as the center and the center of the rivet hole as the moving point, an annular area is defined between the reference circle and the outer edge of the rotor end plate, and the riveted reinforcement pit at least partially overlaps with the annular area.

[0007] Optionally, the riveted reinforcement pit is arranged close to the outer edge of the rotor end plate.

[0008] Optionally, the number of the rivet holes is N, N≥4, and at least one riveting reinforcement pit is provided between any two adjacent rivet holes.

[0009] Optionally, a plurality of the riveting reinforcement pits are evenly spaced between two adjacent rivet holes.

[0010] Optionally, the shape of the riveted reinforcement pit is at least one of a circle, a rectangle, a square, a triangle, a prism, an ellipse, a trapezoid, and a sector. The present invention further provides a motor comprising the rotor assembly described above.

[0011] The present invention also provides a motor, comprising a rotor core; and Two rotor end plates, the rotor core is clamped and fixed between the two rotor end plates, and at least one rotor end plate is the rotor end plate described above.

[0012] Optionally, both of the rotor end plates are riveted to form at least one riveted reinforcement pit.

[0013] Optionally, the axial projections of the riveted reinforcement pits of the two rotor end plates at least partially overlap.

[0014] Optionally, the number of stator slots of the motor is Z, the number of poles of the motor is P, and Z / P=3 / 2 or Z / P=6 / 5 is satisfied.

[0015] The present invention also provides a compressor comprising the motor as described above.

[0016] The present invention also provides a refrigeration device comprising the compressor as described above.

[0017] The rotor end plate according to the technical solution of the present invention has a first plate surface facing the end of the rotor core, and a second plate surface opposite to the first plate surface. The rotor end plate is provided with a plurality of rivet holes spaced circumferentially, and at least one riveted reinforcement pit is provided on the second plate surface between at least two adjacent rivet holes. Rivet holes are provided on the rotor end plate for fasteners to pass through and fasten the rotor core. By tightening the connection between the rotor core and the rotor end plate, the rotor assembly as a whole can be made more stable, and vibration and noise caused by loose components during operation can be reduced. At least one riveted reinforcement pit is provided on the second plate surface between at least two adjacent rivet holes. This design can increase the local stiffness of the rotor end plate, increase the strength of the riveted parts, improve the overall structural stability, prevent loosening or falling off during operation, and reduce the resonance of the rotor during high-speed rotation, thereby reducing vibration and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of an embodiment of a rotor end plate of the present invention; Figure 2 This is a schematic structural diagram of another embodiment of a rotor end plate of the present invention; Figure 3 This is a schematic structural diagram of another embodiment of a rotor end plate of the present invention; Figure 4 This is a schematic structural diagram of another embodiment of a rotor end plate of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the rotor end plate of the present invention.

[0020] Description of Figure Numbers:

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] With the progress of society and economic development, people's living standards have been significantly improved. When consumers purchase refrigeration equipment such as air conditioners and refrigerators, in addition to paying attention to the price, they are also more concerned about the noise problem of refrigeration equipment.

[0026] The compressor is a core component of refrigeration equipment like refrigerators and air conditioners, while the motor is the compressor's power output. The vibration and noise of the motor directly affect the vibration and noise levels of these refrigeration equipment. Therefore, reducing compressor vibration and noise is a challenge currently facing those skilled in the art. Optimizing the structural and dimensional parameters of the motor's rotor end plate during motor design can significantly reduce motor vibration and noise.

[0027] To this end, the present invention proposes a motor, which aims to improve the installation structure of the rotor end plate of the motor, enhance the overall structural stability, prevent loosening or falling off during operation, and thus reduce motor vibration and noise.

[0028] Reference Figures 1 to 5 In one embodiment of the present invention, the motor includes a stator assembly (not shown), a rotor assembly (not shown), brushes, a housing, etc. This solution reduces the vibration of the motor by optimizing the structure of the rotor assembly. Specifically, the rotor assembly includes a rotor core (not shown) and two rotor end plates 100. The rotor core is located between the two rotor end plates 100. The two rotor end plates 100 are provided with rivet holes 110. There are multiple rivet holes 110, and the rivet holes 110 are used to pass fasteners through to fasten the rotor core. The rotor end plates 100 are mounted on the axial ends of the rotor core of the motor. The rotor end plates 100 have a first plate surface 101 facing the end of the rotor core, and a second plate surface 102 opposite the first plate surface 101. The rotor end plates 100 are provided with multiple rivet holes 110 spaced circumferentially. The second plate surface 102 has at least one riveting reinforcement pit 130 between at least two adjacent rivet holes 110.

[0029] The rotor end plate 100 described in the technical solution of the present invention has a first plate surface 101 facing the end of the rotor core, and a second plate surface 102 opposite the first plate surface 101. The rotor end plate 100 is provided with a plurality of rivet holes 110 spaced circumferentially, and at least one riveted reinforcement pit 130 is provided on the second plate surface 102 between at least two adjacent rivet holes 110. The rivet holes 110 are provided in the rotor end plate 100 for fasteners to pass through and secure the rotor core. By tightening the connection between the rotor core and the rotor end plate 100, the rotor assembly is made more stable and vibration and noise caused by loose components during operation are reduced. At least one riveted reinforcement pit 130 is provided on the second plate surface 102 between at least two adjacent rivet holes 110. This design can increase the local stiffness of the rotor end plate 100, increase the strength of the riveted parts, improve the overall structural stability, prevent loosening or falling off during operation, and reduce the resonance of the rotor during high-speed rotation, thereby reducing vibration and noise.

[0030] Furthermore, the thickness of the rotor end plate 100 is d, the recessed depth of the riveted reinforcement pit 130 is h, and h satisfies: h≥0.1 mm, and / or h≤d / 2.

[0031] The depth from the lowest point of the riveted reinforcement pit 130 recessed toward the rotor core to the outer surface of the rotor end plate 100 is h, and 0.1 mm ≤ h ≤ d / 2 mm.

[0032] The rotor assembly is usually provided with two balancing iron blocks. Each balancing iron block has two rivet holes 110 and is fixed to the rotor assembly by rivets. It can be understood that the number of rivet holes 110 on the rotor end plate 100 is N, where N ≥ 4. Taking four rivet holes 110 as an example: In one embodiment, the four rivet holes 110 of the rotor end plate 100 form four adjacent spacing segments 120, wherein one or more riveted reinforcement pits 130 are riveted on any spacing segment 120. The shape and size of the riveted reinforcement pits 130 are not limited. The riveted reinforcement pits 130 can be close to both ends of the spacing segment 120, preferably close to the middle position.

[0033] In one embodiment, the four rivet holes 110 of the rotor end plate 100 form four adjacent spacing segments 120, wherein any two spacing segments 120 are riveted with one or more riveted reinforcement pits 130. The shape and size of the riveted reinforcement pits 130 are not limited. The riveted reinforcement pits 130 can be close to both ends of the spacing segments 120, preferably close to the middle position, and the riveted reinforcement pits 130 can be staggered.

[0034] In one embodiment, four adjacent spacing segments 120 are formed in the four rivet holes 110 of the rotor end plate 100 , wherein each of the four spacing segments 120 is riveted with one riveted reinforcement pit 130 or multiple riveted reinforcement pits 130 .

[0035] The depth limit of the riveted reinforcement pit 130 can ensure that the riveted reinforcement pit 130 improves the local stiffness between the rotor end plate 100 and the rotor core. If the depth of the riveted reinforcement pit 130 is small, the clamping effect is not obvious; if the depth of the riveted reinforcement pit 130 is large, it may cause warping on the one hand and damage on the other hand.

[0036] At least one riveted reinforcement pit 130 is riveted between at least two adjacent riveted holes on the rotor end plate 100. This design can increase the local stiffness of the rotor end plate 100, reduce the resonance phenomenon of the rotor during high-speed rotation, and thus reduce vibration and noise. The thickness of the rotor end plate 100 is d, and the depth from the lowest point of the riveted reinforcement pit 130 recessed toward the rotor core to the outer surface of the rotor end plate 100 is h. 0.1mm≤h≤d / 2mm. The depth from the lowest point of the riveted reinforcement pit 130 recessed toward the rotor core to the outer surface of the rotor end plate 100 is h, which limits the depth range of the riveted reinforcement pit 130. This helps ensure the structural stability and stiffness of the rotor end plate 100 and avoids vibration and noise caused by excessive deformation. By optimizing the structural dimensions of the rotor end plate 100, the rotor processing quality is improved, the rotor rigidity is enhanced, and the performance indicators such as noise and vibration of the motor and compressor are improved.

[0037] Specifically, the number of stator slots Z of the motor is equal to the number of poles P of the motor, and Z / P=3 / 2 or 6 / 5.

[0038] When Z / P = 3 / 2, this ratio usually corresponds to the design of three-phase asynchronous motors (induction motors). In this case, the number of stator slots is 1.5 times the number of poles, which is suitable for some specific motor applications.

[0039] When Z / P = 6 / 5, this ratio usually corresponds to the design of permanent magnet synchronous motors. Permanent magnet synchronous motors usually require a higher number of stator slots to achieve better performance and efficiency, so this ratio is suitable for the design of permanent magnet synchronous motors.

[0040] Limiting the ratio of the number of stator slots to the number of motor poles can affect the magnetic field distribution and spatial harmonics of the motor, thereby affecting the efficiency of the motor. In this solution, by reasonably selecting the number of stator slots and the ratio of the number of poles, magnetic field leakage and iron loss can be reduced, thereby improving the efficiency of the motor. Secondly, limiting the number of stator slots and the ratio of the number of motor poles can affect the torque fluctuation of the motor. This solution can make the motor produce a smoother torque output and reduce vibration and noise by using a reasonable ratio of the number of slots to the number of poles. Moreover, by limiting the number of stator slots and the ratio of the number of motor poles, this solution can also affect the overall size of the motor, optimize the motor design layout, and reduce the size and weight of the motor.

[0041] Furthermore, at least one riveted reinforcement pit 130 is formed by riveting on both rotor end plates 100 .

[0042] In one embodiment, the relatively upper rotor end plate 100 is riveted to form one riveted reinforcement pit 130 or a plurality of riveted reinforcement pits 130 .

[0043] In one embodiment, the relatively lower rotor end plate 100 is riveted to form one or more riveted reinforcement pits 130 .

[0044] In one embodiment, both the upper and lower rotor end plates 100 are riveted to form one riveted reinforcement pit 130 or multiple riveted reinforcement pits 130 .

[0045] Furthermore, the projected areas of the riveted reinforcement pits 130 of the two rotor end plates 100 in the axial direction at least partially overlap.

[0046] In one embodiment, both the upper rotor end plate 100 and the lower rotor end plate 100 are riveted with riveted reinforcement pits 130. In the axial projection direction, the number and position of the riveted reinforcement pits 130 of the upper rotor end plate 100 and the riveted reinforcement pits 130 of the lower rotor end plate 100 are the same, and the projections correspond one-to-one and overlap. Here, the shapes and sizes of the riveted reinforcement pits 130 can be different.

[0047] In one embodiment, both the upper rotor end plate 100 and the lower rotor end plate 100 are riveted with riveted reinforcement pits 130. In the axial projection direction, the number and position of the riveted reinforcement pits 130 of the upper rotor end plate 100 and the riveted reinforcement pits 130 of the lower rotor end plate 100 are different. For example, the number of the riveted reinforcement pits 130 of the upper rotor end plate 100 can be greater than the number of the lower rotor end plate 100, and the shape of the riveted reinforcement pits 130 of the upper rotor end plate 100 partially overlaps with the shape of the riveted reinforcement pits 130 of the lower rotor end plate 100.

[0048] Furthermore, the shapes and / or sizes of the riveted reinforcement pits 130 of the two rotor end plates 100 are different.

[0049] In one embodiment, the riveting reinforcement pits 130 have different shapes but the same size.

[0050] In one embodiment, the riveting reinforcement pits 130 have different sizes but the same shape.

[0051] In one embodiment, the shapes and sizes of the riveted reinforcement pits 130 are different.

[0052] Specifically, the centers of any two adjacent rivet holes 110 form a spacing segment 120 , the number of the rivet holes 110 is N, N≥4, and at least one riveting reinforcement pit 130 is provided in any of the spacing segments 120 .

[0053] Specifically, the riveted reinforcement pits 130 are evenly distributed within the spacing section 120 .

[0054] Specifically, the shape of the riveting reinforcement pit 130 is at least one of a circle, a triangle, a prism, an ellipse, a trapezoid, and a fan.

[0055] In one embodiment, the riveting reinforcement pit 130 is circular in shape.

[0056] In one embodiment, the shape of the riveting reinforcement pit 130 is triangular.

[0057] In one embodiment, the shape of the riveting reinforcement pit 130 is a quadrilateral, such as a rectangle, a square, a trapezoid, or a prism.

[0058] Furthermore, the area of ​​the riveted reinforcement pit 130 is larger than the area of ​​the rivet hole 110 , which better increases the local stiffness of the rotor end plate 100 and reduces the resonance phenomenon of the rotor during high-speed rotation, thereby reducing vibration and noise.

[0059] Furthermore, the outer diameter of the circle formed by the center of the rivet hole 110 and the center of the rotor end plate 100 and the outer diameter of the rotor end plate 100 define an annular area 140, and the riveted reinforcement pit 130 at least partially overlaps with the annular area 140. In order to better increase the local stiffness of the rotor end plate 100 and reduce resonance, the design of overlapping with the annular area 140 can ensure that the reinforcement effect of the riveted reinforcement pit 130 is fully exerted, making the entire rotor end plate 100 more stiff in this area. The riveted reinforcement pit 130 can increase the thickness of the material near the riveted hole, thereby improving the stiffness of this area. When rotating at high speeds, the rotor is often prone to resonance, resulting in increased vibration and noise. By limiting the portion of the riveted reinforcement pit 130 to overlap with the annular area 140, the occurrence of resonance can be effectively reduced, and the stability and smooth operation of the rotor can be improved. The presence of the riveted reinforcement pit 130 can improve the connection effect of the fastener, making the connection between the rotor core and the rotor end plate 100 more secure. At the same time, the overlap of the riveted reinforcement pit 130 and the annular area 140 can ensure more uniform and effective force transmission, avoid local stress concentration, and improve the overall performance of the rotor system.

[0060] Furthermore, the riveted reinforcement pits 130 are located near the outer edge of the rotor end plate 100. This location can reduce the risk of warping, making the entire structure more stable. This location can maximize the local stiffness of the rotor end plate 100, effectively improving the dynamic characteristics of the rotor assembly during rotation and reducing the probability of resonance effects. Avoiding resonance effects can reduce system vibration amplitude and reduce noise generation.

[0061] The present invention also proposes a compressor, which includes a motor and a rotor assembly. The specific structure of the rotor assembly refers to the above-mentioned embodiment. Since this compressor adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0062] The present invention also provides a refrigeration device comprising a compressor. The specific structure of the compressor is described with reference to the above-described embodiments. Since the present refrigeration device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, which are not further detailed here. Refrigeration devices include, but are not limited to, refrigerators, air conditioners, freezers, refrigerators, ice makers, air coolers, water chillers, condensers, evaporators, compressors, cooling towers, expansion valves, thermostats, and the like. These devices are widely used in various fields, such as homes, businesses, industry, healthcare, and scientific research, and play an irreplaceable role in maintaining a comfortable production, living, and scientific research environment.

[0063] Refrigerators are among the most common refrigeration devices in everyday life. Air conditioners are among the most common refrigeration devices in commercial and industrial settings. Refrigeration equipment also plays a crucial role in healthcare and scientific research. For example, hospitals rely on refrigerators and freezers to store medicines, while research institutions rely on high-precision, high-efficiency refrigeration equipment for various experiments and research.

[0064] Therefore, under the premise of controlling motor costs and improving or maintaining cooling effects, researching motor equipment with lower noise levels will have greater market competitiveness and promote technological progress.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rotor end plate, mounted on the axial end of the rotor core of a motor, characterized in that: The rotor end plate has a first plate surface facing the end of the rotor core and a second plate surface opposite to the first plate surface. The rotor end plate is provided with a plurality of rivet holes arranged at intervals along the circumferential direction, and at least one riveted reinforcement pit is provided on the second plate surface between at least two adjacent rivet holes.

2. The rotor end plate according to claim 1, wherein: The thickness of the rotor end plate is d, the recessed depth of the riveted reinforcement pit is h, and h satisfies: h≥0.1 mm, and / or h≤d / 2.

3. The rotor end plate according to claim 1, wherein: A reference circle is defined with the center of the rotor end plate as the center and the center of the rivet hole as the moving point. An annular area is defined between the reference circle and the outer edge of the rotor end plate, and the riveting reinforcement pit at least partially overlaps with the annular area.

4. The rotor end plate according to claim 3, wherein: The riveting reinforcement pit is arranged close to the outer edge of the rotor end plate.

5. The rotor end plate according to claim 1, wherein: The number of the rivet holes is N, where N≥4, and at least one riveting reinforcement pit is provided between any two adjacent rivet holes.

6. The rotor end plate according to claim 5, characterized in that: The plurality of riveting reinforcement pits are evenly spaced and arranged between two adjacent rivet holes.

7. The rotor end plate according to claim 1, wherein: The shape of the riveting reinforcement pit is at least one of circular, rectangular, square, triangular, prismatic, elliptical, trapezoidal, and fan-shaped.

8. A motor, characterized in that: include: rotor core; and Two rotor end plates, the rotor core is clamped and fixed between the two rotor end plates, and at least one rotor end plate is the rotor end plate according to any one of claims 1 to 7.

9. The motor according to claim 8, characterized in that Both of the rotor end plates are riveted to form at least one riveted reinforcement pit; And / or, the projections of the riveted reinforcement pits of the two rotor end plates in the axial direction at least partially overlap.

10. The motor according to claim 8, wherein The number of stator slots of the motor is Z, the number of poles of the motor is P, and Z / P=3 / 2 or Z / P=6 / 5 is satisfied.

11. A compressor, characterized in that: Comprising a rotor assembly as claimed in any one of claims 8 to 10.

12. A refrigeration device, characterized in that: Including the compressor according to claim 11.

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