JP3239445U - Vibration noise reduction structure for ultra-high-speed wind motor - Google Patents

Abstract

A vibration noise reduction structure for an ultrahigh-speed wind motor that effectively reduces resonance and noise during motor operation is provided. A vibration noise reduction structure for an ultra-high speed wind motor of the present invention includes a cylindrical silica gel holder, a motor housing having one end open, a stator cavity opened therein, and a through hole at the other end. a bearing cavity communicated with the stator cavity is opened therein, the bearing assembly is fitted in the silica gel holder and inserted into the bearing cavity, and one end of the motor rotor is inserted into the bearing cavity and passed through and the other end is rotatably fitted into the motor stator through the through hole, and the motor stator is inserted into the stator cavity. The present invention provides a silica gel holder between the bearing assembly and the motor housing, so that the bearing does not come into direct contact with the motor housing, and the moving parts form a floating state. contact area is further reduced, thereby reducing transmission of vibrations generated when the motor rotor rotates to the motor housing, effectively reducing resonance and noise during motor operation. [Selection drawing] Fig. 1

Description

This utility model belongs to the technical field of motor devices, and particularly relates to a vibration noise reduction structure for ultra-high-speed wind motors.

In the prior art, the bearings of high-speed motors are mounted directly into the bearing cavities of the motor housing, which is generally made of metal, and as the rotor and paddles of the motor rotate, the vibrations generated are transmitted through the bearings directly into the motor housing. It is easy to generate noise due to transmission and resonance, affecting the user's feeling of use and possibly interfering with the normal operation of the motor.

The technical problem to be solved by this utility model is to overcome the drawback of the prior art that a motor that rotates at high speed tends to generate noise due to resonance during high-speed operation, and to provide a vibration noise reduction structure for an ultra-high-speed wind motor. That's what it is.

A vibration noise reduction structure for an ultra-high speed wind motor, comprising a motor housing, a bearing assembly, a motor stator, and a motor rotor, further comprising a cylindrical silica gel holder, wherein the silica gel holders are spaced apart on the outer circumference. The motor housing has an open end with a stator cavity inside and a through hole at the other end with a bearing cavity communicating with the stator cavity inside. The bearing assembly is fitted in the silica gel holder and inserted into the bearing cavity, and the motor rotor has one end inserted into and through the bearing cavity, through the through hole, and the other end of the motor rotor. A motor stator is rotatably fitted within the motor stator and the motor stator is inserted into the stator cavity. In this utility model, by providing a silica gel holder between the bearing assembly and the motor housing, the bearing assembly does not come into direct contact with the motor housing, and the moving parts form a floating state. The contact area of the motor housing is further reduced, thereby reducing transmission of vibrations generated when the motor rotor rotates to the motor housing, effectively reducing resonance and noise during motor operation.

Furthermore, there are six annular protrusions, three of which are provided at each end of the silica gel holder. By providing six annular projections, the silica gel holder is more stably mounted in the bearing cavity, and by providing three on each end, the silica gel holder is balanced and the rotation of the motor rotor is gentle.

Further, the bearing assembly includes a pair of coaxial bearings and a spring fixed between the two bearings. By providing the bearing assembly, the spring can create an axial preload on the two bearings, reducing bearing noise while increasing bearing durability.

Furthermore, the motor stator is completely enclosed within the stator cavity. In conventional designs, the stator cavity encloses only half the depth of the motor stator. improved, thus improving the concentricity of the motor stator and motor rotor, further reducing the noise and vibration generated by the motor.

Further, the motor housing includes an inner wall and an outer wall fitted to the inner wall, the inner wall and the outer wall are fixedly connected to a plurality of air guides, and an air duct is formed between the inner wall and the outer wall. , a paddle fixed to one end through which the motor rotor passes through the through hole and rotates with the motor rotor. By combining the paddle and the air duct, the airflow generated by the rotation of the paddle passes through the air duct, enabling effective heat dissipation of the motor.

Further, the air guide has a spiral shape and is provided with an inclination direction opposite to the inclination direction of the blades of the paddle. By arranging the air guide and the blade of the paddle in the opposite direction of inclination, the air guide works in conjunction with the airflow generated by the rotation of the paddle, improving the working efficiency of the motor and reducing the airflow generated by the motor. Generates the Coanda effect.

Furthermore, the air guide has seven sheets. By providing seven air guides, the airflow can be guided more effectively.

It has the following beneficial effects:

1. In this utility model, by providing a silica gel holder between the bearing assembly and the motor housing, the bearing assembly does not come into direct contact with the motor housing, and the moving parts form a floating state. The contact area of the motor housing is further reduced, thereby reducing the transmission of vibration generated when the motor rotor rotates to the motor housing, effectively reducing resonance and noise during motor operation, and providing six annular projections. Thus, the silica gel holders are more stably installed in the bearing cavity, and three at each end ensure the silica gel holders are balanced and the rotation of the motor rotor is gentle.

2. By providing a bearing assembly, the utility model allows a spring to generate an axial preload on the two bearings, which reduces bearing noise and at the same time increases the durability of the bearings. Since the stator cavity is provided to completely enclose the motor stator, whereas the cavity encloses only half the depth of the motor stator, the concentricity between the motor stator and the motor housing is improved, thus improving the motor The concentricity between the stator and the motor rotor is improved, further reducing the noise and vibration produced by the motor.

3. In this utility model, by installing the paddle and air duct together, the air flow generated by the rotation of the paddle passes through the air duct, enabling effective heat dissipation from the motor. The air guide acts in conjunction with the airflow generated by the rotation of the paddle, improves the working efficiency of the motor, generates the Coanda effect in the airflow generated by the motor, and provides seven air guides. By doing so, the airflow can be guided more effectively.

FIG. 1 is a schematic cross-sectional view of the utility model. FIG. 2 is a schematic diagram of the assembly structure of the present utility model. FIG. 3 is a schematic diagram of the mounting structure of the present utility model.

For those skilled in the art to better understand the technical solutions in the present application, a clear and complete description of the technical solutions in the embodiments of the present application will be given below together with the accompanying drawings in the examples of the present application, wherein the described examples are Apparently, this is only a part of the embodiments of the present application, but not all of them. Based on the embodiments of the present application, all other embodiments obtained by persons skilled in the art without the need for inventive efforts shall fall within the protection scope of the present application.

As shown in FIGS. 1, 2 and 3, this embodiment is a vibration noise reduction structure for an ultra-high speed wind motor including a motor housing 1, a bearing assembly, a motor stator 4 and a motor rotor 5, It further includes a columnar silica gel holder 3, the silica gel holder 3 is formed with a plurality of annular projections 31 spaced apart on its outer circumference, the motor housing 1 is open at one end, and a stator cavity 12 is opened therein. and the other end has a through hole, in which a bearing cavity 11 communicating with the stator cavity 12 is opened. One end of the motor rotor 5 is inserted and penetrated into the bearing cavity 11 , passes through the through hole, and the other end is rotatably fitted into the motor stator 4 . is inserted into the stator cavity 12 . Since the motor housing 1 is made of metal, the stability and durability of the motor can be ensured.

By providing the silica gel holder 3 between the bearing assembly and the motor housing 1, the bearing assembly does not come into direct contact with the motor housing 1, and the moving parts form a floating state. The contact area of the motor housing 1 is further reduced, thereby reducing transmission of vibrations generated when the motor rotor 5 rotates to the motor housing 1, effectively reducing resonance and noise during motor operation.

Specifically, there are six annular protrusions 31, and three protrusions are provided at each end of the silica gel holder 3. As shown in FIG. By providing six annular projections 31, the silica gel holder 3 is more stably installed in the bearing cavity 11, and by providing three on each end, the silica gel holder 3 is balanced, and the motor rotor 5 rotates. becomes calm.

The bearing assembly includes a pair of coaxial bearings 21 and a spring 22 fixed between the two bearings 21 . The spring 22 is in a compressed state, and by providing the bearing assembly, the spring 22 can generate an axial preload on the two bearings 21, which reduces the noise of the bearings 21 and increases the durability of the bearings 21. Increase.

As a further refinement of this embodiment, the motor stator 4 is completely enclosed within the stator cavity 12 . Since the stator cavity 12 is provided to completely enclose the motor stator 4, whereas in conventional designs the stator cavity 12 encloses only half the depth of the motor stator 4, the motor stator 4 and the motor housing 1 and thus the concentricity of the motor stator 4 and the motor rotor 5 are improved, further reducing the noise and vibration produced by the motor.

The motor housing 1 includes an inner wall and an outer wall fitted to the inner wall, the inner wall and the outer wall are fixedly connected to a plurality of air guides 13, and an air duct is formed between the inner wall and the outer wall. , a paddle 6 , which is fixed to one end through which the motor rotor 5 passes through the through hole and rotates with the motor rotor 5 . When the motor rotor 5 rotates, the paddle 6 rotates with it, and the inclined blades of the paddle 6 feed the airflow into the air duct. The airflow generated by the rotation passes through the air ducts, allowing the motor to dissipate heat effectively.

The air guide 13 has a helical shape and is provided with an inclination direction opposite to the inclination direction of the blades of the paddle 6 . By arranging the air guide 13 and the blade of the paddle 6 in opposite directions of inclination, the air guide 13 works in conjunction with the airflow generated by the rotation of the paddle 6, thereby improving the work efficiency of the motor. Creates the Coanda effect in the generated airflow.

The air guide 13 has seven sheets. By providing seven air guides 13, the airflow can be guided more effectively.

The working principle is that by adding one silica gel holder 3 between the bearing assembly and the bearing cavity 11 of the motor housing 1, the moving parts including the motor stator 4 are separated from the motor housing 1, and the vibration generated by the motor operation is eliminated. The transmission to the motor housing 1 is reduced to avoid the occurrence of large vibration noise. The generated air current acts on the air guide 13 to improve the working efficiency of the motor.

The above is a more detailed description of the present utility model in combination with specific preferred embodiments, and it is not admitted that the specific embodiments of the present utility model are limited only to these descriptions. For those skilled in the art to which this utility model pertains, many equivalent substitutions or obvious variations with the same performance or application can be made without departing from the concept of the utility model, all of which are: should be regarded as belonging to the scope of protection of this utility model.

Reference Signs List 1 motor housing 11 bearing cavity 12 stator cavity 13 air guide 21 bearing 22 spring 3 silica gel holder 31 annular protrusion 4 motor stator 5 motor rotor 6 paddle

Claims (7)

A vibration noise reduction structure for an ultra high speed wind motor comprising a motor housing (1), a bearing assembly, a motor stator (4) and a motor rotor (5), further comprising a cylindrical silica gel holder (3), The silica gel holder (3) has a plurality of annular projections (31) formed at intervals on the outer circumference, the motor housing (1) is open at one end and has a stator cavity (12) therein, The other end has a through hole, inside which is opened a bearing cavity (11) communicating with the stator cavity (12), the bearing assembly is fitted in the silica gel holder (3), and the Inserted into the bearing cavity (11), the motor rotor (5) is inserted and penetrated into the bearing cavity (11) at one end, passes through the through hole, and rotates at the other end into the motor stator (4) A vibration noise reduction structure for an ultra-high speed wind motor, wherein the motor stator (4) is inserted into the stator cavity (12). 2. The vibration noise reduction structure for an ultra-high-speed wind motor according to claim 1, wherein there are six annular protrusions (31), and three are provided at each end of the silica gel holder (3). 2. Ultra high speed motor according to claim 1, wherein said bearing assembly comprises a pair of coaxially mounted bearings (21) and a spring (22) fixed between two said bearings (21). Vibration noise reduction structure for wind motors. Vibration noise reduction structure for ultra high speed wind motor according to claim 1, wherein the motor stator (4) is completely enclosed in the stator cavity (12). The motor housing (1) includes an inner wall and an outer wall fitted on the inner wall, the inner wall and the outer wall are fixedly connected to a plurality of air guides (13), and between the inner wall and the outer wall, 2. The method according to claim 1, wherein an air duct is formed and further comprises a paddle (6), said paddle (6) being fixed at one end through which said motor rotor (5) passes through a through-hole and rotating with said motor rotor (5). Vibration noise reduction structure of the ultra-high speed wind motor described. 6. The vibration noise reduction of the ultra-high speed wind motor according to claim 5, wherein the air guide (13) has a helical shape and has an inclination direction opposite to the inclination direction of the blades of the paddle (6). structure. 6. The vibration noise reduction structure for a super high speed wind motor according to claim 5, wherein the air guide (13) has seven pieces.

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