CN215733836U - Motor with noise reduction function - Google Patents

Abstract

The utility model discloses a motor with noise reduction function, comprising: a housing; the stator is fixedly connected with the shell; a rotating shaft provided in the housing, the rotating shaft being provided with a rotor capable of rotating relative to the stator; the end cover is arranged at the end part of the shell, blocks the side opening of the shell and is fixedly connected with the shell, and the sound absorption and noise reduction components are respectively arranged on the inner side and the outer side of the end cover and are used for realizing sound absorption and noise reduction; a fixing member for fixing the sound-absorbing and noise-reducing assembly to the end cap. The utility model solves the problem that the motor in the prior art has larger noise in the operation process.

Description

Motor with noise reduction function

Technical Field

The utility model belongs to the field of motor equipment, and particularly relates to an improvement of a motor structure with a noise reduction function.

Background

The existing motor structure comprises a shell, an end cover is arranged at one end of the shell, a rotating shaft is connected with a rotor, a stator is arranged on the shell, the rotating shaft drives the rotor to rotate relative to the stator when rotating, and a cooling fan used for cooling is correspondingly arranged inside the shell.

In the application process of the mining explosion-proof motor, the motor runs at a high speed, the motor can generate considerable noise, the noise can cause serious personal injury to workers in the working environment, the source of the noise is mainly divided into electromagnetic noise, mechanical noise and ventilation noise, the electromagnetic noise can be generated due to the action of electromagnetic force in a motor shell, meanwhile, the ventilation noise can be caused due to the high-speed rotation of a cooling fan, an end cover is one of the main ways of outward propagation of the noise, the mechanical noise is included in addition, the mechanical vibration noise caused by machining errors is mainly transmitted outwards through a rotating shaft of the motor and the like, and the noise of the motor is large in the using process.

SUMMERY OF THE UTILITY MODEL

Aiming at the problem that the noise of the motor is high in the operation process in the prior art, the utility model provides a novel motor with a noise reduction function, and the novel motor can achieve a good noise reduction effect.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

an electric machine with noise reduction function, comprising:

a housing;

the stator is fixedly connected with the shell;

a rotating shaft provided in the housing, the rotating shaft being provided with a rotor capable of rotating relative to the stator;

the end cover is arranged at the end part of the shell, blocks the side opening of the shell and is fixedly connected with the shell,

the sound absorption and noise reduction assemblies are respectively arranged on the inner side surface and the outer side surface of the end cover and are used for realizing sound absorption and noise reduction;

and the fixing part is used for fixing the sound-absorbing and noise-reducing assembly to the end cover, and an airflow circulating part is arranged on the fixing part so that the airflow inside and outside the machine shell can be mutually circulated.

In some embodiments of the present application, the sound absorbing and noise reducing assembly comprises at least:

the first sound absorption and noise reduction piece covers the inner side face of the end cover;

and the second sound-absorbing and noise-reducing piece covers the outer side surface of the end cover.

In some embodiments of the present application, the fixing member includes:

the first fixing piece is used for pressing and fixing the first sound absorption and noise reduction piece on the inner side surface of the end cover;

and the second fixing piece is used for fixing the second sound-absorbing and noise-reducing piece on the outer side surface of the end cover.

In some embodiments of the present application, the first sound absorbing and noise reducing member and the second sound absorbing and noise reducing member are sound absorbing sponges, and at least one layer is disposed on each of the first sound absorbing and noise reducing member and the second sound absorbing and noise reducing member.

In some embodiments of the present application, the first sound absorbing and noise reducing member is fitted to the inside contour of the end cap, and the second sound absorbing and noise reducing member is fitted to the outside contour of the end cap.

In some embodiments of the present application, the first fixing member is a first fixing cover, and an avoiding portion for avoiding the rotation axis and a first airflow circulating portion provided through the first fixing cover are provided on the first fixing cover.

In some embodiments of the present application, the first airflow passing part is a plurality of first airflow passing holes opened in the first fixed cover, the first airflow passing holes are arranged in a plurality of layers in a radial direction of the first fixed cover, each layer is provided in plurality, a plurality of first airflow passing holes located in the same layer are arranged in a circumferential direction of the first fixed cover, and intervals between adjacent first airflow passing holes are the same.

In some embodiments of the present application, the second fixing member is a second fixing cover, the second fixing cover is adapted to a contour of the end cover, and a second airflow circulating part facilitating airflow circulation is disposed on the second fixing cover.

In some embodiments of the present application, the second airflow circulation part includes a plurality of sets of airflow circulation holes arranged in a circumferential direction of the second stationary shroud, each set of airflow circulation holes includes a plurality of second airflow circulation holes arranged in a radial direction of the second stationary shroud, and lengths of the plurality of second airflow circulation holes increase in a radial direction from inside to outside.

In some embodiments of the present application, the motor with noise reduction function further includes:

a third porous acoustic panel disposed between the first acoustic noise reduction member and the first mount;

and the fourth porous sound absorption plate is arranged between the second sound absorption and noise reduction piece and the second fixing piece.

Compared with the prior art, the utility model has the advantages and positive effects that:

when the motor with the noise reduction function is arranged, the sound absorption and noise reduction assembly is arranged on the inner side surface and the outer side surface of the motor end cover, electromagnetic noise and ventilation noise generated inside the motor can be absorbed through the noise reduction piece arranged on the inner side of the end cover, and the way of outward transmission of the electromagnetic noise and the ventilation noise is blocked;

the noise, which is transmitted to the outside of the end cap via the rotating shaft and the bearing inner cap fitted in the end cap and is due to mechanical vibrations, is correspondingly absorbed by the noise reduction means arranged outside the end cap of the electric machine.

Through the effect that sets up the subassembly of making an uproar that falls of inhaling in the end cover inboard and the outside, can carry out effectual isolated and absorption to the noise that the motor produced, realize reducing the effect of the whole noise of motor to owing to be provided with the air current circulation portion on fixed part, can also guarantee the normal heat dissipation function of motor.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a motor with a noise reduction function according to the present invention;

FIG. 2 is a left side view of the motor with noise reduction of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic structural diagram of a second fixing member of the motor with noise reduction function according to the present invention;

fig. 5 is a schematic structural diagram of a first fixing member of the motor with a noise reduction function according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

the utility model provides a motor with noise reduction function, comprising:

and a housing 100 formed inside the housing 100 to accommodate an assembly.

And a stator 200 fixedly connected to the casing 100, the stator 200 being connected to an inner sidewall of the casing 100.

And a rotating shaft provided in the housing 100, and provided with a rotor 300 rotatable with respect to the stator 200.

When the rotating shaft is installed, the rotating shaft penetrates the casing 100 along the length direction of the casing 100, and when the motor rotates at a high speed, the rotating shaft rotates to drive the rotor 300 connected with the rotating shaft to rotate relative to the stator 200 fixed on the casing 100.

An end cover 400 disposed at an end of the casing 100, blocking the side opening of the casing 100 and fixedly connected with the casing 100,

in some embodiments of the present application, openings are provided at both sides of the casing 100, and 2 end caps 400 are provided, respectively disposed at the positions of the openings at both sides of the casing 100, to block the casing 100.

The end covers 400 located at the front side and the rear side of the casing 100 are fastened and fixed to the corresponding end surfaces of the casing 100 of the motor by bolts.

To achieve rotation of the rotating shaft relative to the housing 100, bearings are correspondingly installed in the end caps 400 when set.

An assembly chamber is provided in the end cap 400, and a bearing cap assembly is provided in the assembly chamber, and specifically, the bearing cap assembly includes an inner bearing cap and an outer bearing cap.

The rotating shaft is fixed with the bearing inner cover, the bearing outer cover is correspondingly arranged on the bearing inner cover, and a bearing is arranged between the bearing inner cover and the bearing outer cover.

The end surface of the bearing outer cover is correspondingly flush with the end surface of the end cover 400 to ensure the aesthetic appearance of the whole bearing installation.

When the rotating shaft rotates, the bearing inner cover can be driven to rotate relative to the bearing outer cover. When the rotor 300 rotates relative to the stator 200, an electromagnetic field is generated inside the casing 100 of the motor.

In some embodiments of the present application, a sound absorbing and noise reducing assembly is provided on at least one of the end caps 400,

such as sound absorbing and noise reducing assemblies at end cap 400 on the back side of the motor.

When the sound-absorbing and noise-reducing components are arranged specifically, the sound-absorbing and noise-reducing components are arranged on the inner side surface and the outer side surface of the end cover 400 respectively so as to realize sound absorption and noise reduction.

Fixing members for fixing the sound-absorbing and noise-reducing assembly to the end cap 400.

In other embodiments of this application, the end cover 400 of motor front side and the end cover 400 position department of rear side all correspond be provided with inhale the sound and fall the subassembly of making an uproar, when fixed, set up 2 groups of fixed subassemblies, inhale 2 end covers 400 departments at the both ends that the fixed motor of the sound falls the subassembly of making an uproar through 2 groups of fixed subassemblies are corresponding, and the both ends position department from the motor is isolated the noise, the effectual sound effect of making an uproar that inhales that has improved whole motor.

The fixing part is provided with an airflow circulating part which can ensure the normal circulation between the inside and outside airflow of the casing 100, thereby ensuring the heat dissipation effect of the whole motor.

In some embodiments of the present application, the sound absorbing and noise reducing assembly comprises at least:

a first sound absorbing and noise reducing member 510 covering an inner side surface of the end cap 400;

in some preferred embodiments, the first sound absorbing and noise reducing member 510 is a sound absorbing sponge, or a porous suction cotton or a sound absorbing felt, etc.

In order to enhance the sound absorption and noise reduction effects of the first sound absorption and noise reduction member 510, the first sound absorption and noise reduction member 510 may be shaped to match the inner side of the end cap 400, so that the first sound absorption and noise reduction member 510 can completely cover the inner side of the end cap 400, thereby increasing the area for absorbing sound.

And a second sound-absorbing and noise-reducing member 520 covering an outer side surface of the end cap 400.

The second sound-absorbing noise-reducing member 520 may be a sound-absorbing sponge, a porous sound-absorbing surface, a sound-absorbing felt, or the like, to reduce noise.

Similarly, for increasing the sound absorption area and improving the sound absorption and noise reduction effects, the second sound absorption and noise reduction member 520 is correspondingly configured to be matched with the outer side profile of the end cap 400, so that the second sound absorption and noise reduction member 520 can be completely covered.

In some embodiments of the present application, the fixing member includes:

a first fixing member 610 for clamping and fixing the sound-absorbing and noise-reducing member to the inner side surface of the end cap 400;

the first retainer 610 has a contour shaped to fit the first sound absorbing and noise reducing member 510 to completely clamp and retain the first sound absorbing and noise reducing member 510 between itself and the end cap 400.

In order to realize the locking and fixing between the first fixing member 610 and the end cap 400, when the first fixing member 610, the first noise absorption and reduction member 510 and the end cap 400 are connected, the first noise absorption and reduction member 510, the first fixing member 610, the first noise absorption and reduction member 510 and the end cap 400 are sequentially inserted through the locking bolt 700, and are locked and fixed, and the first noise absorption and reduction member 510 is firmly fixed on the inner side surface of the end cap 400 by the clamping action force of the first fixing member 610.

In some embodiments of the present application, the first fixing member 610 is a first fixing cover on which an escape part 611 for escaping the rotation shaft and a first airflow passing part 612 disposed through the first fixing cover are disposed.

In some embodiments of the present application, the first airflow passing part 612 is a plurality of first airflow passing holes opened in the first fixed cover, the first airflow passing holes are arranged in a plurality of layers in a radial direction of the first fixed cover, each layer is provided in plurality, a plurality of first airflow passing holes located in the same layer are arranged in a circumferential direction of the first fixed cover, and intervals between adjacent first airflow passing holes are the same.

The first airflow circulation hole is an arc-shaped long-strip hole and is formed along the circumferential direction of the first fixed cover, and heat generated in the motor can be normally discharged outwards through the first airflow circulation hole.

Through the first fixed cover that sets up not only can guarantee that it can be with the first sound absorption fall make an uproar piece 510 complete laminating fix on end cover 400, but also can guarantee the holistic radiating effect of motor.

Since the rotating shaft is installed with the end inserted into the end cap 400, it must pass through the first noise/sound absorbing member 510 and the first fixing member 610.

In order to avoid the rotating shaft, when the first sound absorbing and noise reducing piece 510 is provided with a first avoiding hole, the first fixing piece 610 is provided with the avoiding part 611, namely, a second avoiding hole.

The aperture of the first avoidance hole and the aperture of the second avoidance hole are slightly larger than the diameter of the rotating shaft, so that the leakage of noise is reduced as much as possible, and the normal rotation of the rotating shaft is ensured.

And a second fixing member 620 for fixing the second noise-absorbing and noise-reducing member 520 to the outer side surface of the end cap 400, which is fixed to the end cap 400 by means of bolt locking, in particular, so as to clamp and fix the second noise-absorbing and noise-reducing member 520 between the end cap 400 and the second noise-absorbing and noise-reducing member.

In some embodiments of the present application, the second fixing member 620 is a second fixing cover, which is adapted to the contour of the end cap 400, and a second air flow passing part 621 for facilitating air flow is disposed on the second fixing cover.

In some embodiments of the present application, the second airflow circulation part 621 includes a plurality of sets of airflow circulation holes arranged along the circumferential direction of the second stationary cover, each set of airflow circulation holes includes a plurality of second airflow circulation holes arranged along the radial direction of the second stationary cover, and the lengths of the plurality of second airflow circulation holes increase along the radial direction from the inside to the outside.

Through the airflow through hole group that sets up, can guarantee that second mounting 620 inhales the sound to the second and falls the fixed of making an uproar 520, but also can guarantee that the motor passes through the outside heat dissipation of second airflow through hole, has guaranteed the normal heat dissipation of whole motor.

The first air flow circulation part 612 and the second air flow circulation part 621 constitute an air flow circulation part in this embodiment, and mainly function to facilitate circulation of air flow.

In the embodiment, the first sound-absorbing and noise-reducing member 510 is disposed inside the end cover 400, and is plugged at one end of the machine casing 100 and located inside the machine casing 100, so that the electromagnetic noise and the ventilation noise generated inside the machine casing 100 can be absorbed by the first sound-absorbing and noise-reducing member 510 to prevent further outward transmission;

meanwhile, each part of the motor can generate mechanical vibration noise during the whole operation and rotation of the motor due to machining errors in the machining and production process, the mechanical vibration noise is mainly transmitted outwards through the rotating shaft and the bearing inner cover, and the noise transmitted outwards to the outer side of the end cover 400 through the rotating shaft and the bearing inner cover is mainly absorbed through the second sound-absorbing noise-reducing piece 520 on the outer side of the end cover 400 because the rotating shaft and the bearing inner cover penetrate through the first sound-absorbing noise-reducing piece 510.

Meanwhile, the first sound absorption and noise reduction member 510 in the present embodiment can also absorb part of the mechanical vibration noise.

Through the first piece 510 and the second piece 520 of making an uproar that falls of inhaling sound that sets up respectively in the inboard and outside of end cover 400 cooperate and can guarantee to absorb the noise of the different grade type that the motor produced, guarantee to inhale the sound noise reduction effect of motor.

In some embodiments of the present application, the first and second sound absorbing and noise reducing members 510, 520 are each provided in at least one layer.

For the reinforcing inhale sound noise reduction effect, first inhale sound noise reduction piece 510 and the second inhale sound noise reduction piece 520 can set up the multilayer, through inhale the cooperation that the sound noise reduction piece was fallen layer upon layer, the reinforcing is to the frictional loss of noise to the reinforcing inhales sound noise reduction effect.

In some embodiments of the present application, the first sound absorbing and noise reducing member 510 and the end cap 400 are adapted to have a contour, and the second sound absorbing and noise reducing member 520 and the end cap 400 are adapted to have a contour, so that the first sound absorbing and noise reducing member 510 and the second sound absorbing and noise reducing member 520 can completely cover the end cap 400, thereby ensuring the sound absorbing and noise reducing effects.

In some embodiments of the present application, the motor with noise reduction function further includes:

a third porous sound-absorbing panel disposed between said first sound-absorbing and noise-reducing member 510 and said first mount 610;

and a fourth porous sound-absorbing plate disposed between the second sound-absorbing and noise-reducing member 520 and the second fixing member 620.

The third porous absorption plate is arranged to achieve a sound absorption effect, noise can pass through the first fixing part 610 when flowing out, then passes through the third porous absorption plate, is absorbed by the third porous absorption plate, then passes through the first sound absorption and noise reduction part 510 to absorb sound, and can pass through the double-layer sound absorption and noise reduction effects of the third porous absorption plate and the first sound absorption and noise reduction part 510 on the inner side of the end cover 400, so that the electromagnetic noise and ventilation noise in the machine shell 100 can be well absorbed;

simultaneously, for the outside noise reduction effect of inhaling of reinforcing, what also correspond in the outside of end cover 400 sets gradually the fourth porous suction plate and the second inhale the sound and fall the noise piece 520 of making an uproar to make the noise of wearing out through the bearing inner cup fall the noise through the bilayer equally, the noise reduction effect is better.

In addition, in this embodiment, the third porous suction plate and the fourth porous suction plate are used to ensure the normal outward heat dissipation of the motor.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An electric machine with noise reduction function, comprising:

a housing;

the stator is fixedly connected with the shell;

a rotating shaft provided in the housing, the rotating shaft being provided with a rotor capable of rotating relative to the stator;

the end cover is arranged at the end part of the shell, blocks the side opening of the shell and is fixedly connected with the shell,

it is characterized by also comprising:

the sound absorption and noise reduction assemblies are respectively arranged on the inner side surface and the outer side surface of the end cover and are used for realizing sound absorption and noise reduction;

and the fixing part is used for fixing the sound-absorbing and noise-reducing assembly to the end cover, and an airflow circulating part is arranged on the fixing part so that the airflow inside and outside the machine shell can be mutually circulated.

2. The motor with noise reduction function according to claim 1, wherein the sound-absorbing and noise-reducing assembly includes at least:

the first sound absorption and noise reduction piece covers the inner side face of the end cover;

and the second sound-absorbing and noise-reducing piece covers the outer side face of the end cover.

3. The motor having a noise reduction function according to claim 2, wherein the fixing member includes:

the first fixing piece is used for pressing and fixing the first sound absorption and noise reduction piece on the inner side surface of the end cover;

and the second fixing piece is used for fixing the second sound-absorbing and noise-reducing piece on the outer side surface of the end cover.

4. The motor with noise reduction function according to claim 2, wherein the first and second noise-absorbing and noise-reducing members are both sound-absorbing sponges, and at least one layer is provided for each of the first and second noise-absorbing and noise-reducing members.

5. The motor with noise reduction function according to claim 2, wherein a first noise absorbing and reducing member is fitted to an inner side profile of the end cap, and a second noise absorbing and reducing member is fitted to an outer side profile of the end cap.

6. The motor having a noise reduction function according to claim 2, wherein the first fixing member is a first fixing cover, and an escape portion for escaping the rotation shaft and a first airflow passage portion provided through the first fixing cover are provided in the first fixing cover.

7. The motor having a noise reduction function according to claim 6, wherein the first airflow circulation portion is a plurality of first airflow circulation holes provided in the first stationary cover, the first airflow circulation holes are arranged in a plurality of layers in a radial direction of the first stationary cover, a plurality of first airflow circulation holes located in the same layer are provided in a circumferential direction of the first stationary cover, and a pitch between adjacent first airflow circulation holes is the same.

8. The motor with a noise reduction function according to claim 2, wherein the second fixing member is a second fixing cover, the second fixing cover is adapted to the contour of the end cover, and a second airflow circulating part facilitating airflow circulation is provided on the second fixing cover.

9. The motor having a noise reduction function according to claim 8, wherein the second airflow circulation portion includes a plurality of sets of airflow circulation holes arranged in a circumferential direction of the second stationary shroud, each set of airflow circulation holes including a plurality of second airflow circulation holes arranged in a radial direction of the second stationary shroud, the plurality of second airflow circulation holes increasing in length in a radial direction from inside to outside.

10. The motor with noise reduction function according to any one of claims 2 to 9, further comprising:

a third porous acoustic panel disposed between the first acoustic noise reduction member and the first mount;

and the fourth porous sound absorption plate is arranged between the second sound absorption and noise reduction piece and the second fixing piece.

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