CN111342577A - Novel motor rotor end plate - Google Patents

Abstract

The invention discloses a novel motor rotor end plate, comprising a rotor body, the end face of the rotor body is provided with a first countersink, the first countersink is coaxial with the rotor body, and the bottom surface of the first counterbore is provided with a second countersink The second counterbore is coaxial with the first counterbore, the side wall of the second counterbore and the bottom surface of the first counterbore are transitioned through chamfering, and the center of the bottom surface of the second counterbore is provided with a through hole, which penetrates the rotor ontology. The invention provides a novel motor rotor end plate, which can reduce the turbulent pulsation generated by the rotor end plate, reduce the rotor rotation resistance, optimize the aerodynamic noise, and at the same time reduce the quality of the end plate.

Description

A new type of motor rotor end plate

technical field

The invention relates to the technical field of motors, in particular to a novel motor rotor end plate.

Background technique

The rotor end plate is the main part of the motor rotor. The existing design of the rotor end plate of the motor does not consider the turbulent pulsation caused by the stiffener design. In turn, turbulent pulsation is generated, which is easy to generate large wind noise, and its sound pressure spectrum characteristics are broadband excitation. In the existing motor rotor end plate, when the motor is accelerated at 1000RPM~8000RPM, the sound pressure level at 0.6m from the motor side reaches 54dB(A)~73dB(A), and large turbulent pulsation will be generated around the end plate, resulting in 700Hz~ The 5000Hz broadband energy excitation is large, which does not meet the low noise design requirements; and when the rotor end plate of the machine is designed, the mass of the rotor end plate is 0.522kg, and the lightweight design requirements are not considered. Therefore, it is necessary to design a new type of motor rotor end plate, which can reduce the turbulent pulsation generated by the rotor end plate, reduce the rotor rotation resistance, optimize the aerodynamic noise, and reduce the quality of the end plate.

Chinese Patent Application Publication No. CN102035276A, published on April 27, 2011, titled "Motor rotor end plate and its manufacturing method", discloses a motor rotor end plate, the end plate includes an annular plate body and a tooth pressure piece. The plate body is provided with a positioning hole corresponding to the tooth pressing piece, the back of the tooth pressing piece is provided with a positioning block, and is placed in the positioning hole of the plate body to be tightly fitted and fixed, and the annular plate body and the tooth pressing piece are fixed by spot welding. The invention also discloses a method for manufacturing a rotor end plate of a motor. The annular plate body is provided with positioning holes corresponding to the tooth pressing pieces, and corresponding positioning blocks are arranged on the back of the tooth pressing pieces, and the positioning blocks are placed in the positioning holes. The precise positioning of the tooth pressing sheet is not only conducive to the positioning of the spot welding, but also can ensure the accuracy of the spot welding and enhance the reliability of the product. However, the rotor end plate in the above patent still has the above problems.

SUMMARY OF THE INVENTION

In order to overcome the problem of high noise of the motor rotor end plate in the prior art, the present invention provides a new type of motor rotor end plate, which can reduce the turbulent flow pulsation generated by the rotor end plate, reduce the rotational resistance of the rotor, optimize the aerodynamic noise, and reduce the end plate at the same time. board quality.

In order to achieve the above object, the present invention adopts the following technical solutions:

A novel motor rotor end plate includes a rotor body, the end face of the rotor body is provided with a first countersink, the first countersink is coaxial with the rotor body, the bottom surface of the first counterbore is provided with a second countersink, the second countersunk The counterbore is coaxially arranged with the first counterbore, the side wall of the second counterbore and the bottom surface of the first counterbore are transitioned by chamfering, and the center of the bottom surface of the second counterbore is provided with a through hole which penetrates the rotor body.

The above optimized rotor end plate of the motor, through the structural topology simulation, optimizes the diameter of the two counterbore holes on the end face of the rotor end plate, and increases the chamfer transition, which effectively reduces the turbulent pulsation, reduces the rotational resistance of the rotor, optimizes the aerodynamic noise, and reduces the End plate quality.

Preferably, the diameter of the first counterbore is 130.6mm, and the diameter of the second counterbore is 90mm. The above diameters are optimized values, and the optimized rear end plate mass is 0.462kg.

Preferably, the chamfering radius is 5mm.

Preferably, the bottom surface between the first counterbore to the second counterbore is a plane. The flat design can reduce the turbulent pulsation of the rotor end plate, thereby reducing noise and vibration.

Preferably, the bottom surface of the first counterbore is provided with a plurality of third counterbore, and the third counterbore is circumferentially distributed along the axis of the first counterbore. The structure can reduce the weight of the rotor end plate.

Preferably, the bottom surface of the first counterbore is provided with a number of counterweight counterbore, and the counterweight counterbore is circumferentially distributed along the axis of the first counterbore. The structure can reduce the weight of the rotor end plate, and at the same time can improve the dynamic balance performance of the rotor end plate.

Preferably, the other end face of the rotor body is flat. The structure can reduce the turbulent flow intensity in the area near the end plate, reduce the rotational resistance of the rotor, and reduce the noise of the motor.

Preferably, the side surface of the first counterbore is a conical inclined surface, and the diameter of the conical inclined surface close to the bottom surface of the first counterbore is smaller than the diameter of the conical inclined surface away from the bottom surface of the first counterbore. The structure can make the transition of the counterbore smoother, reduce the turbulent flow intensity in the area near the end plate, reduce the rotational resistance of the rotor, and reduce the noise of the motor.

Preferably, the side surface of the second counterbore is a conical inclined surface, and the diameter of the conical inclined surface close to the bottom surface of the second counterbore is smaller than the diameter of the conical inclined surface close to the bottom surface of the first counterbore. The structure can make the transition of the counterbore smoother, reduce the turbulent flow intensity in the area near the end plate, reduce the rotational resistance of the rotor, and reduce the noise of the motor.

The beneficial effects of the invention are as follows: it can reduce the turbulent flow intensity in the area near the end plate, reduce the rotor rotation resistance, reduce the motor noise, improve the broadband noise spectrum, and improve the sound quality level of the motor; cost requirements.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is a cross-sectional view in the present invention.

In the figure: rotor body 1 , first counterbore 2 , second counterbore 3 , chamfer 4 , through hole 5 , third counterbore 6 , counterweight counterbore 7 .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Example 1:

As shown in Figures 1 and 2, a new type of motor rotor end plate includes a rotor body 1, the end face of the rotor body 1 is a plane; the other end face of the rotor body 1 is provided with a first counterbore 2, the first counterbore 2 The diameter of the first counterbore 2 is 130.6mm, and the first counterbore 2 is arranged coaxially with the rotor body 1; the bottom surface of the first counterbore 2 is provided with a second counterbore 3, 90mm of the second counterbore 3, the second counterbore 3 and the first counterbore A counterbore 2 is coaxially arranged, and the bottom surface between the first counterbore 2 and the second counterbore 3 is a plane; the side wall of the second counterbore 3 and the bottom surface of the first counterbore 2 transition through the chamfer 4, and the chamfer 4 The radius is 5mm. The center of the bottom surface of the second counterbore 3 is provided with a through hole 5, which penetrates the rotor body 1; the bottom surface of the first counterbore 2 is provided with a number of third counterbores 6, The axis of the counterbore 2 is circumferentially distributed; the bottom surface of the first counterbore 2 is provided with a number of counterweight counterbore 7, and the counterweight counterbore 7 is distributed circumferentially along the axis of the first counterbore 2. The side surface of the first counterbore 2 is a conical inclined surface, the side surface of the first counterbore 2 is a conical inclined surface, and the diameter of the conical inclined surface close to the bottom surface of the first counterbore 2 is smaller than that of the conical inclined surface away from the first counterbore. 2 Diameter at the bottom surface. The diameter of the conical inclined surface close to the bottom surface of the second counterbore 3 is smaller than the diameter of the conical inclined surface close to the bottom surface of the first counterbore 2 .

The beneficial effects of the invention are as follows: it can reduce the turbulent flow intensity in the area near the end plate, reduce the rotor rotation resistance, reduce the motor noise, improve the broadband noise spectrum, and improve the sound quality level of the motor; cost requirements.

Claims (9)

1. The utility model provides a novel motor rotor end plate, includes rotor body, characterized by, and rotor body's terminal surface is equipped with first counter bore, and first counter bore sets up with rotor body is coaxial, is equipped with the second counter bore on the bottom surface of first counter bore, and the second counter bore sets up with first counter bore is coaxial, and the underrun chamfer transition of the first counter bore of lateral wall of second counter bore, and second counter bore bottom surface center is equipped with the through-hole, the through-hole runs through rotor body.

2. The novel motor rotor end plate of claim 1, wherein the diameter of the first counter bore is 130.6mm, and the diameter of the second counter bore is 90 mm.

3. The new electric machine rotor end plate of claim 2, wherein said chamfer radius is 5 mm.

4. The novel motor rotor end plate of claim 1, wherein the bottom surface between the first counterbore and the second counterbore is a plane.

5. The novel motor rotor end plate as claimed in claim 1, 2, 3 or 4, wherein a plurality of third counter bores are arranged on the bottom surface of the first counter bore, and the third counter bores are distributed along the axis of the first counter bore in the circumferential direction.

6. The novel motor rotor end plate as claimed in claim 1, 2, 3 or 4, wherein a plurality of counter weight holes are formed in the bottom surface of the first counter weight hole, and are distributed along the axial direction of the first counter weight hole.

7. A novel motor rotor end plate according to claim 1 or 2 or 3 or 4, wherein the other end face of the rotor body is planar.

8. The novel motor rotor end plate of claim 1, 2, 3 or 4, wherein the side surface of the first counterbore is a tapered inclined surface, and the diameter of the tapered inclined surface close to the bottom surface of the first counterbore is smaller than the diameter of the tapered inclined surface far away from the bottom surface of the first counterbore.

9. The novel motor rotor end plate of claim 1, 2, 3 or 4, wherein the side surface of the second counterbore is a tapered inclined surface, and the diameter of the tapered inclined surface close to the bottom surface of the second counterbore is smaller than that of the tapered inclined surface close to the bottom surface of the first counterbore.

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