Permanent magnet rotor end plate

Abstract

The utility model relates to a kind of permanent magnet rotor end plate, which is not only lighter in overall quality, but also has good combination firmness between fan blades and rotor end plate body, and good heat dissipation effect, comprising a rotor end plate body, a shaft through hole is provided on the upper end surface of the rotor end plate body, and the shaft through hole penetrates the upper and lower end surfaces of the rotor end plate body, a plurality of fan blades are provided on the upper end surface of the rotor end plate body, and the plurality of fan blades are equidistantly distributed around the shaft through hole, one ventilation hole is respectively provided on the two sides of each fan blade, the ventilation hole penetrates the upper and lower end surfaces of the rotor end plate body, a first fan blade extension is provided on the outside of each fan blade, and the lower end surface of the first fan blade extension is fixedly connected to the upper end surface of the rotor end plate body, a second fan blade extension is provided on the inside of each fan blade, and the lower end surface of the second fan blade extension is fixedly connected to the upper end surface of the rotor end plate body. Advantage: a kind of permanent magnet rotor end plate not only lighter in overall quality, but also has good combination firmness between fan blades and rotor-end plate body, and good heat dissipation effect.

Description

Technical Field

[0001] This utility model belongs to the field of permanent magnet motor manufacturing technology, specifically relating to a permanent magnet rotor end plate. Background Technology

[0002] CN 210517922 U, entitled "A Motor Rotor End Plate", includes an end plate body with the same shape and size as the cross-section of a motor rotor core, and multiple fan blades disposed on the end face of the end plate body. Each fan blade has a balance adjustment hole. The multiple fan blades are located on the same end face of the end plate body and are all perpendicular to the end face of the end plate body. The multiple fan blades are arranged in a spiral shape at equal angles along the circumference of the end plate body with the center of the end plate body as the center. The end plate body is made of stainless steel, and the fan blades are made of stainless steel. The number of fan blades is greater than or equal to 4 and is an even number, and the multiple fan blades are integrally formed with the end plate body. The balance adjustment hole is connected to a balance structure to compensate for weight and achieve uniform weight distribution of the end plate body. Its shortcomings are: First, the end plate body and the fan blades in the motor rotor end plate are stamped from the same stainless steel plate. The stainless steel motor rotor end plate has good overall structural strength, but its overall weight is also relatively heavy; Second, the balance adjustment holes in the motor rotor end plate are set on the fan blades. This adds a balance structure (such as bolts) to the fan blades. The added balance structure on the fan blades will interfere with the airflow generated by the fan blades during rotation, thus affecting the heat dissipation effect of the motor rotor end plate. Utility Model Content

[0003] Design objective: To design a permanent magnet rotor end plate that is not only lightweight overall, but also has a strong connection between the fan blades and the rotor end plate body, and has good heat dissipation effect.

[0004] Design scheme: To achieve the above design objectives.

[0005] 1. Each fan blade has a ventilation hole on both sides, the ventilation hole passing through the upper and lower end faces of the rotor end plate body. Each fan blade has a first fan blade extension on its outer side and the lower end face of the first fan blade extension is fixedly connected to the upper end face of the rotor end plate body. Each fan blade has a second fan blade extension on its inner side and the lower end face of the second fan blade extension is fixedly connected to the upper end face of the rotor end plate body. This design is one of the technical features of this utility model. The purpose of this design is twofold: First, each fan blade has a first fan blade extension on its outer side, with the lower end face of the first fan blade extension fixedly connected to the upper end face of the rotor end plate body. Each fan blade also has a second fan blade extension on its inner side, with the lower end face of the second fan blade extension fixedly connected to the upper end face of the rotor end plate body. The rotor end plate body is made of aluminum or aluminum alloy, and the fan blades are also made of aluminum or aluminum alloy. This design ensures a strong connection between the fan blades and the rotor end plate body while reducing the weight of the permanent magnet rotor end plate. Second, each fan blade has a ventilation hole on both sides, which penetrates both the upper and lower end faces of the rotor end plate body. This design, with ventilation holes on both sides of the fan blades, provides the permanent magnet rotor end plate with better ventilation and heat dissipation.

[0006] 2. The upper end face of the rotor end plate body is provided with multiple dynamic balancing threaded holes, which penetrate through the upper and lower end faces of the rotor end plate body. The design of the multiple dynamic balancing threaded holes being equidistantly distributed around the through hole of the rotating shaft is the second technical feature of this utility model. The purpose of this design is that: the upper end face of the rotor end plate body is provided with multiple dynamic balancing threaded holes, which penetrate through the upper and lower end faces of the rotor end plate body. The multiple dynamic balancing threaded holes are equidistantly distributed around the through hole of the rotating shaft. Since the dynamic balancing threaded holes of this application are located on the rotor end plate body, when a bolt is installed on the dynamic balancing threaded holes to perform dynamic balancing adjustment of a permanent magnet rotor end plate, the bolts used for balancing will hardly interfere with the airflow generated by the rotating fan blades (compared to a motor rotor end plate in the prior art). Thus, compared to a motor rotor end plate in the prior art, the permanent magnet rotor end plate of this application has a relatively better heat dissipation effect.

[0007] 3. The upper end face of the rotor end plate body is provided with multiple bolt fixing holes, and the bolt fixing holes penetrate through the upper and lower end faces of the rotor end plate body. The multiple bolt fixing holes are equidistantly distributed around the through hole of the rotor shaft, and the centers of the multiple bolt fixing holes are located on the circumference of the same circle. The upper end face of the rotor end plate body is provided with multiple bolt misalignment holes, and the bolt misalignment holes penetrate through the upper and lower end faces of the rotor end plate body. The centers of the multiple bolt misalignment holes and the centers of the multiple bolt fixing holes are located on the circumference of the same circle. The design of alternating distribution of the centers of the multiple bolt misalignment holes and the multiple bolt fixing holes is the third technical feature of this utility model. The purpose of this design is as follows: the upper end face of the rotor end plate body is provided with multiple bolt fixing holes, and the bolt fixing holes penetrate through the upper and lower end faces of the rotor end plate body. The multiple bolt fixing holes are equidistantly distributed around the through hole of the rotor shaft, and the centers of the multiple bolt fixing holes are located on the circumference of the same circle. The upper end face of the rotor end plate body is provided with multiple bolt misalignment holes, and the bolt misalignment holes penetrate through the upper and lower end faces of the rotor end plate body. The centers of the multiple bolt misalignment holes and the centers of the multiple bolt fixing holes are located on the circumference of the same circle. The centers of the multiple bolt misalignment holes and the multiple bolt fixing holes are alternately distributed. In this way, after the permanent magnet rotor end plate and the rotor are installed, half of the long bolts and the other half of the long bolts are installed in opposite directions. This can reduce the risk of loosening after the permanent magnet rotor end plate and the rotor are assembled.

[0008] Technical solution: A permanent magnet rotor end plate includes a rotor end plate body. The upper end face of the rotor end plate body is provided with a shaft through hole that passes through both the upper and lower end faces of the rotor end plate body. The upper end face of the rotor end plate body is provided with multiple fan blades that are equidistantly distributed around the shaft through hole. Each fan blade has a ventilation hole on both sides that passes through both the upper and lower end faces of the rotor end plate body. Each fan blade has a first fan blade extension on its outer side, and the lower end face of the first fan blade extension is fixedly connected to the upper end face of the rotor end plate body. Each fan blade has a second fan blade extension on its inner side, and the lower end face of the second fan blade extension is fixedly connected to the upper end face of the rotor end plate body.

[0009] Compared with the prior art, the present invention provides a permanent magnet rotor end plate that is not only lighter in overall weight, but also has a better connection between the fan blades and the rotor end plate body, and a better heat dissipation effect. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of a permanent magnet rotor end plate.

[0011] Figure 2 A schematic diagram of a three-dimensional structure of a permanent magnet rotor end plate. Figure 1 .

[0012] Figure 3 A schematic diagram of a three-dimensional structure of a permanent magnet rotor end plate. Figure 2 .

[0013] Figure 4 This is a three-dimensional design drawing of a permanent magnet rotor end plate. Detailed Implementation

[0014] Example 1: Refer to Appendix Figures 1-4 A permanent magnet rotor end plate includes a rotor end plate body 1. The upper end face of the rotor end plate body 1 has a shaft through hole 2 that extends through both the upper and lower end faces of the rotor end plate body 1. The upper end face of the rotor end plate body 1 has multiple fan blades 3, equidistantly distributed around the shaft through hole 2. Each fan blade 3 has a ventilation hole 4 on both sides, extending through both the upper and lower end faces of the rotor end plate body 1. Each fan blade 3 has a first fan blade extension 31 on its outer side, with its lower end face fixedly connected to the upper end face of the rotor end plate body 1. Each fan blade 3 has a second fan blade extension 32 on its inner side, with its lower end face fixedly connected to the upper end face of the rotor end plate body 1. The number of fan blades 3 is 8, and the number of ventilation holes 4 is 16. The fan blades 3 arranged on the rotor end plate body 1 dissipate heat from the rotor interior and magnets through the ventilation holes 4.

[0015] The rotor end plate body 1 is made of aluminum or aluminum alloy, and the fan blades 3 are also made of aluminum or aluminum alloy. The aluminum or aluminum alloy used to manufacture the rotor end plate body 1 and fan blades 3 are existing materials. The rotor end plate body 1 and multiple fan blades 3 are integrally cast. The upper end face of the rotor end plate body 1 has multiple dynamic balancing threaded holes 5, which penetrate both the upper and lower end faces of the rotor end plate body 1. These multiple dynamic balancing threaded holes 5 are equidistantly distributed around the through hole 2 of the rotating shaft. The rotor is dynamically balanced by screwing screws into the dynamic balancing threaded holes 5 or by applying adhesive to the dynamic balancing threaded holes 5.

[0016] The upper end face of the rotor end plate body 1 is provided with a plurality of bolt fixing holes 6 and the bolt fixing holes 6 penetrate the upper and lower end faces of the rotor end plate body 1. The plurality of bolt fixing holes 6 are equidistantly distributed around the through hole 2 of the rotating shaft and the centers of the plurality of bolt fixing holes 6 are located on the circumference of the same circle. The upper end face of the rotor end plate body 1 is provided with multiple bolt misalignment holes 7, which penetrate the upper and lower end faces of the rotor end plate body 1. The center of the multiple bolt misalignment holes 7 and the center of the multiple bolt fixing holes 6 are located on the same circumference. The center of the multiple bolt misalignment holes 7 and the multiple bolt fixing holes 6 are alternately distributed. There are four bolt fixing holes 6 and four bolt misalignment holes 7. In use, a permanent magnet rotor end plate is assembled and fixed to the rotor by long bolts and nuts. The number of long bolts is the sum of the number of bolt fixing holes 6 and the number of bolt misalignment holes 7. The number of long bolts matches the number of nuts. The rotor is fixed by the bolt fixing holes 6 and the bolt misalignment holes 7. Specifically, a permanent magnet rotor end plate is placed on the front end face and the rear end face of the rotor, respectively. The bolt fixing hole 6 in one type of permanent magnet rotor end plate is connected to the corresponding bolt misalignment hole 7 in another type of permanent magnet rotor end plate, and the bolt misalignment hole 7 in one type of permanent magnet rotor end plate is connected to the corresponding bolt fixing hole 6 in another type of permanent magnet rotor end plate. The rotor has multiple screw through holes that penetrate both the front and rear end faces of the rotor. A screw through hole is provided between the corresponding bolt fixing hole 6 and the bolt misalignment hole 7. A long bolt is then installed between the corresponding bolt fixing hole 6 and the bolt misalignment hole 7, with the long bolt passing through the corresponding screw through hole. The nut is located in the corresponding bolt misalignment hole 7. The staggered arrangement of the bolt fixing hole 6 and the bolt misalignment hole 7 ensures that half of the long bolts on the permanent magnet rotor end plate and the rotor are installed in opposite directions, reducing the risk of loosening after assembly. This utility model belongs to the field of manufacturing three-phase permanent magnet synchronous motors and can be used in water pump motors, geared motors, air compressors, and other permanent magnet motor fields.

[0017] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.

Claims

1. A permanent magnet rotor end plate, comprising a rotor end plate body (1), wherein the upper end face of the rotor end plate body (1) is provided with a shaft through hole (2) and the shaft through hole (2) penetrates the upper and lower end faces of the rotor end plate body (1), and the upper end face of the rotor end plate body (1) is provided with a plurality of fan blades (3) and the plurality of fan blades (3) are equidistantly distributed around the shaft through hole (2), characterized in that: Each fan blade (3) has a ventilation hole (4) on both sides. The ventilation hole (4) passes through the upper and lower end faces of the rotor end plate body (1). Each fan blade (3) has a first fan blade extension (31) on its outer side and the lower end face of the first fan blade extension (31) is fixedly connected to the upper end face of the rotor end plate body (1). Each fan blade (3) has a second fan blade extension (32) on its inner side and the lower end face of the second fan blade extension (32) is fixedly connected to the upper end face of the rotor end plate body (1).

2. The permanent magnet rotor end plate according to claim 1, characterized in that: The rotor end plate body (1) is made of aluminum or aluminum alloy, and the fan blade (3) is made of aluminum or aluminum alloy.

3. A permanent magnet rotor end plate according to claim 1 or 2, characterized in that: The rotor end plate body (1) and multiple fan blades (3) are integrally cast.

4. A permanent magnet rotor end plate according to claim 1, 2, or 3, characterized in that: The upper end face of the rotor end plate body (1) is provided with a plurality of dynamic balance threaded holes (5) and the dynamic balance threaded holes (5) penetrate the upper and lower end faces of the rotor end plate body (1). The plurality of dynamic balance threaded holes (5) are equidistantly distributed around the through hole (2) of the rotor shaft.

5. A permanent magnet rotor end plate according to claim 1, characterized in that: The upper end face of the rotor end plate body (1) is provided with a plurality of bolt fixing holes (6) and the bolt fixing holes (6) penetrate the upper and lower end faces of the rotor end plate body (1). The plurality of bolt fixing holes (6) are equidistantly distributed around the through hole (2) of the rotating shaft and the center of the plurality of bolt fixing holes (6) is located on the circumference of the same circle.

6. A permanent magnet rotor end plate according to claim 5, characterized in that: The upper end face of the rotor end plate body (1) is provided with a plurality of bolt misalignment holes (7) and the bolt misalignment holes (7) penetrate the upper and lower end faces of the rotor end plate body (1). The center of the plurality of bolt misalignment holes (7) and the center of the plurality of bolt fixing holes (6) are located on the same circumference. The center of the plurality of bolt misalignment holes (7) and the plurality of bolt fixing holes (6) are alternately distributed.

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