CN111416467B

CN111416467B - Vibration and Noise Suppression Device of Permanent Magnet Brushless DC Motor

Info

Publication number: CN111416467B
Application number: CN202010325480.4A
Authority: CN
Inventors: 赵浩; 刘青松; 王殿梁; 王璇; 李洪武; 马如远; 周丽; 王成贤; 戴婷; 王挺; 陈晟; 习聪玲
Original assignee: Jiaxing University
Current assignee: Jiaxing University
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-02-02
Anticipated expiration: 2040-04-23
Also published as: CN111416467A

Abstract

The present invention provides a device for suppressing vibration and noise of a permanent magnet brushless DC motor, comprising: an outer casing, a return pipe and a liquid suction hole; a group of the inner baffles are fixedly connected to the inside of the outer casing; A group of the motor main bodies is fixedly connected internally; a group of the return plates is fixedly connected to the inner left side of the outer casing; and a group of the current accumulation plates is fixedly connected to the inner right side of the outer casing. The device changes the previous air-cooled cooling method. By adopting the internal circulation liquid cooling structure, the aerodynamic noise of the motor is reduced, and the wave-shaped inner deflector and liquid are used to reduce the transmission of motor vibration and noise. The transmission of electromagnetic noise and mechanical noise is reduced, and a good noise reduction purpose is achieved. At the same time, the device has a relatively simple structure, is easy to manufacture, and has a low production cost.

Description

Vibration noise suppression device for permanent magnet brushless DC motor

Technical Field

The invention belongs to the technical field of motor noise reduction matching, and particularly relates to a vibration noise suppression device of a permanent magnet brushless direct current motor.

Background

The permanent magnet brushless motor has excellent speed regulation performance similar to that of a direct current motor, overcomes the defects of low reliability and the like of a reversing spark caused by a mechanical reversing device adopted by the direct current motor, and has high operation efficiency, small volume and light weight, so the permanent magnet brushless motor is widely applied to the fields of aerospace, electric vehicles, medical instruments, meters, servo systems, numerical control machines, military equipment, chemical engineering, light spinning, modern household appliances and the like, and the permanent magnet brushless motor generally needs to be provided with a cooling fan to cool the motor in application so as to prevent the motor from being burnt out.

For example, application No.: the invention discloses a brushless direct current motor structure, which comprises a motor body (1) and a controller (2), and is characterized in that: install fan radiator (3) between motor body (1) and controller (2), fan radiator (3) dispel the heat to motor body (1) and controller (2). The invention increases the fan radiator to accelerate the air flow on the surfaces of the motor body and the controller, accelerates the heat dissipation, has good heat dissipation effect, can effectively control the working temperature of the motor body and the controller, and greatly reduces the failure rate.

When the equipment is used, although good heat dissipation of the motor can be realized, the fan is easy to generate vibration and noise in the operation process, and meanwhile, the vibration noise of the motor is high, so that the working environment is seriously influenced in use, and the health of people is harmed.

Disclosure of Invention

In order to solve the technical problems, the invention provides a vibration noise suppression device for a permanent magnet brushless direct current motor, which aims to solve the problems that although the existing device can realize good heat dissipation of a motor, a fan is easy to generate vibration and noise in the operation process, and the vibration noise of the motor is high, so that the working environment is seriously influenced in use, and the physical health of people is harmed.

The purpose and the effect of the vibration noise suppression device of the permanent magnet brushless direct current motor are achieved by the following specific technical means:

the vibration noise suppression device of the permanent magnet brushless direct current motor comprises an outer shell, a backflow pipe, backflow radiating fins, flow collecting radiating fins, a lifting ring, a liquid collecting cavity, a liquid conveying cavity, a flow converging cavity, a flow dividing cavity, an inner guide plate, a liquid groove, a motor main body, a centrifugal impeller, a backflow plate, a backflow hole, a flow accumulating plate and a liquid sucking hole; the inner part of the outer shell is fixedly connected with a group of inner guide plates; the inner part of the inner guide plate is fixedly connected with a group of motor main bodies; the left side inside the outer shell is fixedly connected with a group of reflux plates; the inside right side fixedly connected with of shell body a set of flow board.

Furthermore, a plurality of groups of spirally arranged fluid grooves are uniformly distributed on the inner side and the outer side of the inner guide plate, and the fluid grooves on the inner side and the outer side are arranged in a staggered manner;

further, the flow accumulating plate is fixed on the right side inside the outer shell, the right side of the outer shell is divided into a liquid collecting cavity and a transfusion cavity, and a group of liquid sucking holes are formed in the middle of the flow accumulating plate;

further, a group of centrifugal impellers is coaxially and fixedly connected to a rotating shaft on the right end face of the motor main body, and the centrifugal impellers are located in the infusion cavity;

furthermore, the backflow plate is fixed on the left side inside the outer shell, the left side of the outer shell is divided into two chambers, namely the confluence chamber and the diversion chamber, and a plurality of groups of backflow holes are formed in the middle of the backflow plate;

furthermore, a plurality of groups of return pipes are uniformly distributed in a circumferential array on the outer side of the outer shell, and the return pipes are used for communicating the flow distribution cavity with the liquid collection cavity;

furthermore, a plurality of groups of reflux radiating fins are uniformly distributed on the outer side of the outer shell, the reflux pipe is inserted into the reflux radiating fins, and a plurality of groups of collecting radiating fins are radially and uniformly distributed on the right end face of the outer shell;

further, a group of lifting rings is arranged on the upper end face of the outer shell;

compared with the prior art, the invention has the following beneficial effects:

the device adopts the cooling liquid to cool the motor, so that the cooling rate of the motor is improved, the noise generated in the past in an air cooling mode is avoided, and meanwhile, the liquid has good shock absorption and sound absorption effects, so that good shock absorption and noise reduction effects are achieved; the flow path which is integrated with the flow guide plate in the liquid flow groove is increased by arranging the flow guide plate on the inner side and the outer side, so that the heat exchange capacity is increased, meanwhile, the wavy structure of the inner flow guide plate achieves good shock-proof and noise-reducing effects, and the device can be produced in a stamping mode and is low in production cost; the reflux radiating fins and the current collecting radiating fins are arranged on the outer side and the right side of the outer shell respectively, so that the radiating area is increased, and the radiating effect is improved; the hanging ring is arranged on the upper end face of the outer shell, so that the motor is carried through the hanging ring in use, the return pipe and the return radiating fins are prevented from being damaged, and the use is convenient; the device has changed the cooling method of forced air cooling in the past, through adopting the liquid cooling structure of inner loop formula, has reduced the aerodynamic noise of motor, utilizes wavy interior guide plate and liquid to reduce the transmission of motor vibration and noise simultaneously, has reduced the transmission of electromagnetic noise and mechanical noise, reaches the good purpose of making an uproar of falling, and the device structure is fairly simple simultaneously, and manufacturing is easy, low in production cost.

Drawings

FIG. 1 is a schematic axial side view of the present invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

FIG. 3 is a schematic isometric sectional view of the present invention.

Fig. 4 is a schematic view of the structure of the centrifugal impeller mounting shaft side of the present invention.

Fig. 5 is a schematic view of the axial side structure of the flow collecting plate according to the present invention.

Fig. 6 is a schematic view of the reflow board mounting shaft side structure of the present invention.

Fig. 7 is a schematic sectional side view of the inner baffle of the present invention.

Fig. 8 is a schematic axial side view of the outer housing of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. an outer housing; 101. a return pipe; 102. a reflow heat sink; 103. a current-collecting heat sink; 104. a hoisting ring; 105. a liquid collection cavity; 106. a transfusion cavity; 107. a manifold chamber; 108. a shunting cavity; 2. an inner baffle; 201. a liquid flowing groove; 3. a motor main body; 301. a centrifugal impeller; 4. a return plate; 401. a return orifice; 5. a flow accumulating plate; 501. and a liquid suction hole.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in figures 1 to 8:

the invention provides a vibration noise suppression device for a permanent magnet brushless DC motor, comprising: the device comprises an outer shell 1, a return pipe 101, a return radiating fin 102, a collecting radiating fin 103, a hanging ring 104, a liquid collecting cavity 105, a liquid conveying cavity 106, a converging cavity 107, a diverging cavity 108, an inner guide plate 2, a liquid groove 201, a motor body 3, a centrifugal impeller 301, a return plate 4, a return hole 401, a flow accumulating plate 5 and a liquid sucking hole 501; a group of inner guide plates 2 are fixedly connected inside the outer shell 1; a group of motor main bodies 3 are fixedly connected inside the inner guide plate 2; the left side inside the outer shell 1 is fixedly connected with a group of reflux plates 4; the right side of the inside of the outer shell 1 is fixedly connected with a group of flow accumulating plates 5.

Wherein, the inboard of interior guide plate 2 and the outside all evenly arrange and be provided with the liquid groove 201 of multiunit helical arrangement, and the liquid groove 201 in inboard and the outside is crisscross setting, and cooling liquid flows in liquid groove 201 and takes away the heat in the motor, and interior guide plate 2 has good shock attenuation and noise reduction effect simultaneously.

Wherein, the flow accumulating plate 5 is fixed on the right side of the inner part of the outer shell 1, the right side of the outer shell 1 is divided into two chambers, namely a liquid collecting cavity 105 and an infusion cavity 106, a group of liquid sucking holes 501 are formed in the middle of the flow accumulating plate 5, and liquid in the liquid collecting cavity 105 is sucked into the infusion cavity 106 through the liquid sucking holes 501 for circular cooling when the liquid circulating cooling device is used.

Wherein, a group of centrifugal impellers 301 are coaxially and fixedly connected to the rotating shaft on the right end face of the motor main body 3, the centrifugal impellers 301 are positioned in the infusion cavity 106, and the centrifugal impellers 301 are driven by the rotation of the motor to realize the circulation of cooling liquid to cool the motor.

Wherein, the inside left side at shell body 1 is fixed to return flow plate 4, separates into two cavities in converging chamber 107 and reposition of redundant personnel chamber 108 with shell body 1's left side, and the middle part of return flow plate 4 is provided with multiunit backward flow hole 401, and through backward flow hole 401 with converging chamber 107 and reposition of redundant personnel chamber 108 intercommunication, guarantee that cooling liquid can carry out abundant cooling to motor body 3's pivot part.

Wherein, the outside circumference array of shell body 1 evenly arranges and is provided with multiunit back flow 101, and back flow 101 will divide the chamber 108 and collect liquid chamber 105 intercommunication, and in use, sends the cooling liquid in the chamber 108 of dividing back to the collection liquid chamber 105 through back flow 101 in order to supply next use.

Wherein, the outside of shell body 1 evenly arranges and is provided with multiunit backward flow fin 102, and back flow 101 alternates on backward flow fin 102, and the cooling liquid that increases heat radiating area through backward flow fin 102 in to back flow 101 cools off, and the right-hand member face of shell body 1 is radially evenly arranged and is provided with multiunit mass flow fin 103, and the cooling liquid that increases heat radiating area through mass flow fin 103 and cools off liquid collecting cavity 105 reaches good cooling effect.

Wherein, the upper end face of shell body 1 is provided with a set of rings 104, in use carries the motor through rings 104, prevents to damage return pipe 101 and backward flow fin 102, facilitates the use.

When in use: the motor body 3 drives the centrifugal impeller 301 to rotate to suck cooling liquid in the liquid collecting cavity 105 into the liquid conveying cavity 106, the cooling liquid in the liquid conveying cavity 106 enters the flow converging cavity 107 through the flow liquid groove 201 on the inner guide plate 2, meanwhile, heat in the motor body 3 is absorbed, the cooling liquid in the flow converging cavity 107 enters the flow diverging cavity 108 through the flow return hole 401, the cooling liquid in the flow diverging cavity 108 enters the return pipe 101, the heat in the cooling liquid is transmitted outwards under the action of the return cooling fins 102, the cooling liquid in the return pipe 101 enters the liquid collecting cavity 105 to converge, and heat exchange is carried out with the outside again under the action of the flow converging cooling fins 103 to bring the heat in the motor body 3 to the outside for emission.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A vibration noise suppression device for a permanent magnet brushless DC motor, comprising: the device comprises an outer shell (1), a return pipe (101), return radiating fins (102), collecting radiating fins (103), a hanging ring (104), a liquid collecting cavity (105), a liquid conveying cavity (106), a converging cavity (107), a flow dividing cavity (108), an inner guide plate (2), a liquid flowing groove (201), a motor main body (3), a centrifugal impeller (301), a return plate (4), a return hole (401), a flow accumulating plate (5) and a liquid sucking hole (501);

the method is characterized in that: the inner part of the outer shell (1) is fixedly connected with a group of inner guide plates (2); the inner part of the inner guide plate (2) is fixedly connected with a group of motor main bodies (3); the left side inside the outer shell (1) is fixedly connected with a group of reflux plates (4); the right side of the inside of the outer shell (1) is fixedly connected with a group of the flow accumulating plate (5).

2. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the inner side and the outer side of the inner guide plate (2) are uniformly provided with a plurality of groups of spirally-arranged fluid tanks (201), and the fluid tanks (201) on the inner side and the outer side are arranged in a staggered manner.

3. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: flow accumulating plate (5) is fixed on the right side of the inside of outer shell (1), the right side of outer shell (1) is divided into liquid collecting cavity (105) and two cavities of infusion cavity (106), a set of liquid sucking hole (501) is opened in the middle of flow accumulating plate (5).

4. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the rotating shaft of the right end face of the motor main body (3) is coaxially and fixedly connected with a group of centrifugal impellers (301), and the centrifugal impellers (301) are located in the infusion cavity (106).

5. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the backflow plate (4) is fixed on the left side of the inner portion of the outer shell (1) and divides the left side of the outer shell (1) into two cavities, namely the confluence cavity (107) and the diversion cavity (108), and multiple groups of backflow holes (401) are formed in the middle of the backflow plate (4).

6. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the outer side circumference array of shell body (1) evenly arranges and is provided with the multiunit back flow (101), back flow (101) will reposition of redundant personnel chamber (108) with liquid collecting cavity (105) intercommunication.

7. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the outer side of the outer shell (1) is uniformly provided with a plurality of groups of reflux radiating fins (102), the reflux pipe (101) is inserted into the reflux radiating fins (102), and the right end face of the outer shell (1) is radially and uniformly provided with a plurality of groups of flow collecting radiating fins (103).

8. The vibration noise suppression device of a permanent magnet brushless dc motor according to claim 1, wherein: the upper end face of the outer shell (1) is provided with a group of lifting rings (104).