CN221900677U - A brushless motor with a heat dissipation turbine - Google Patents

Abstract

The utility model relates to a brushless motor with a heat dissipation turbine, which belongs to the technical field of motors and comprises a shell, a rotor and a stator, wherein the shell and the stator are of cylindrical hollow structures, the shell is sleeved and fixed on the surface of the stator, the turbine is also arranged in the shell, the turbine is of a disc-shaped structure, the center of the turbine is arranged in the middle of a rotor shaft at one end of the turbine, a fluid channel of the hollow structure is arranged in the turbine, one end of the fluid channel is an air outlet, the other end of the fluid channel is an air inlet, a plurality of blades are arranged in the fluid channel, air can enter the fluid channel through the air inlets at the periphery of the turbine, and is intensively guided to the air outlets of the turbine, which are close to one end surfaces of the rotor and the stator, through the fluid channel, the air outlet can intensively perform targeted air blast on a heating source stator, thereby playing a role of radiating a heating source, and greatly improving the heat dissipation efficiency of the brushless motor.

Description

A brushless motor with a heat dissipation turbine

Technical Field

The utility model relates to the technical field of motors, in particular to a brushless motor with a heat dissipation turbine.

Background Art

The brushless motor is composed of the motor body and the driver, and is a typical mechatronics product. Since the brushless DC motor is operated in an automatic manner, it does not need an additional starting winding on the rotor like the synchronous motor that starts under heavy load under variable frequency speed regulation, nor does it produce oscillation and loss of step when the load changes suddenly. The permanent magnets of small and medium-capacity brushless DC motors now mostly use rare earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy levels. Therefore, the volume of the brushless motor is smaller than that of the three-phase asynchronous motor of the same capacity.

The motor is an indispensable part of the electrical field, and its main function is to provide power. However, during use, the motor often becomes hot, so in general brushless motors, fans are used to blow air to the stator and rotor inside the motor to dissipate heat, keep the surrounding air unobstructed, and create enough airflow to dissipate heat for the motor, reducing the heating of the motor.

Specifically, the fan generally used in the existing motor as shown in Figure 1 can be fixedly assembled on the rotating shaft of the rotor and rotates with the rotating shaft to blow air. However, the fan of this structure only plays a role of blowing air over a large range in the radial direction of the rotating shaft. Since the conventional heat source in the motor is the stator for producing excitation, the fan of this structure cannot concentrate on the axial direction of the rotor and stator for blowing, and its heat dissipation efficiency is low. Therefore, in view of these current situations, it is urgent to develop a brushless motor with a heat dissipation turbine to meet the needs of actual use.

Utility Model Content

The utility model aims to provide a brushless motor with a heat dissipation turbine, which is used to solve the defects of the existing brushless motor that the fan has a large blowing range and cannot blow air specifically to the stator which is the main heat source, resulting in low heat dissipation efficiency of the brushless motor.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

A brushless motor with a heat dissipation turbine comprises a shell, a rotor and a stator. Both the shell and the stator are cylindrical hollow structures. The shell is sleeved and fixed on the surface of the stator. Both ends of the rotor are rotor shafts extending to both ends. The middle part of the rotor is inserted into the interior of the stator, and the rotor is rotatably connected to the shell through the rotor shaft. A turbine is also arranged inside the shell. The turbine is a disc-shaped structure. The center of the turbine is arranged in the middle of the rotor shaft at one end. A fluid channel with a hollow structure is arranged inside the turbine. One end of the fluid channel is an air outlet. The air outlet is opened at one end face of the turbine close to the rotor and the stator. The other end of the fluid channel is an air inlet. The air inlet is opened at the edges around the turbine. A plurality of blades are also arranged inside the fluid channel.

In the above description, as a further solution, a boss protruding outward is provided at the center of one end face of the turbine near the rotor and the stator, and the fluid channel is opened on the edges around the boss in an annular structure, and a shaft hole matching the rotor shaft is opened in the middle of the boss, and the turbine is plugged and fixed to the rotor shaft through the shaft hole.

In the above description, as a further solution, the middle part of the fluid channel shrinks inwardly, and the cross-sectional gaps of the air outlet and the air inlet are both larger than the cross-sectional gap of the middle part of the fluid channel.

In the above description, as a further solution, the blades are distributed in a spiral shape from the center of the turbine to the air inlet, one end of the blade extends to the air outlet, and the other end of the blade extends to the air inlet and outlet.

In the above description, as a further solution, one end of the outer shell is a detachable end cover, and the two ends of the rotor shaft are rotatably connected to the center of the end cover and the end of the outer shell through bearings, and the end of the rotor shaft away from the end cover can extend to the outside of the end of the outer shell.

In the above description, as a further solution, the stator includes several groups of coil windings and an iron core frame, and the several groups of coil windings are respectively wound around the iron core frame, and a terminal board is also provided on the inner side of the end cover, and the terminal board is electrically connected to the corresponding coil windings, and the outer shell is sleeved on the surface of the iron core frame.

The beneficial effects produced by the utility model are as follows:

The present application discloses a brushless motor with a heat dissipation turbine, in which a turbine for dissipating heat from the brushless motor is further provided inside a casing, wherein the turbine is a disc-shaped structure, and a hollow fluid channel is provided inside the turbine, and one end of the fluid channel is an air outlet, and the air outlet is provided at an end face of the turbine close to the rotor and the stator. The turbine rotates along with the rotor shaft, and air can enter the fluid channel through air inlets around the edges of the turbine, and is concentratedly guided through the fluid channel to an air outlet at an end face of the turbine close to the rotor and the stator. The air outlet can blow air in a concentrated manner to the heat source stator, thereby dissipating heat from the heat source in a targeted manner, thereby greatly improving the heat dissipation efficiency of the brushless motor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a heat dissipation fan of a motor in the prior art;

FIG2 is a schematic diagram of the structural decomposition of a brushless motor with a heat dissipation turbine according to the present invention;

FIG3 is a schematic structural diagram of a turbine in a brushless motor with a heat dissipation turbine according to the present invention;

FIG4 is a schematic cross-sectional view of a turbine in a brushless motor with a heat dissipation turbine according to the present invention;

FIG5 is a schematic cross-sectional view of a brushless motor with a heat dissipation turbine according to the present invention;

In the figure: 1-housing, 2-end cover, 3-rotor, 31-rotor shaft, 4-stator, 41-core frame, 42-coil winding, 5-turbine, 51-fluid channel, 511-air outlet, 512-air inlet, 52-boss, 521-rotating shaft hole, 53-blade, 6-connection board, 7-bearing, 8-cooling fan.

DETAILED DESCRIPTION

In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

Please refer to Figures 1-5, which specifically implement a brushless motor with a heat dissipation turbine, including a shell 1, a rotor 3 and a stator 4, the shell 1 and the stator 4 are both cylindrical hollow structures, the shell 1 is sleeved and fixed on the surface of the stator 4, wherein the stator 4 includes a plurality of groups of coil windings 42 and a core frame 41, the plurality of groups of coil windings 42 are respectively wound around the core frame 41, and the inner side of the end cover 2 is also provided with a wiring board 6, the wiring board 6 is electrically connected to the corresponding coil windings 42, the shell 1 is sleeved on the surface of the core frame 41, both ends of the rotor 3 are rotor shafts 31 extending to both ends, the middle part of the rotor 3 is inserted into the inside of the stator 4, and the rotor 3 is rotatably connected to the shell 1 through the rotor shaft 31, one end of the shell 1 is a detachable end cover 2, the two ends of the rotor shaft 31 are rotatably connected to the center of the end cover 2 and the end of the shell 1 through bearings 7, and the end of the rotor shaft 31 away from the end cover 2 can extend to the outside of the end of the shell 1.

A turbine 5 is also provided inside the housing 1. Specifically, as shown in Figures 2 and 3, the turbine 5 is a disc-shaped structure. The center of the turbine 5 is set in the middle of the rotor shaft 31 at one end. A fluid channel 51 with a hollow structure is provided inside the turbine 5. One end of the fluid channel 51 is an air outlet 511. The air outlet 511 is opened at an end surface of the turbine 5 close to the rotor 3 and the stator 4. The other end of the fluid channel 51 is an air inlet 512. The air inlet 512 is opened on the edges of the turbine 5. A plurality of blades 53 are also provided inside the fluid channel 51. The blades 53 are spirally distributed along the center of the turbine 5 toward the air inlet 512. One end of the blade 53 extends to the air outlet 511, and the other end of the blade 53 extends to the air inlet and outlet 512.

The turbine 5 rotates along with the rotor shaft 31, and air can enter the fluid channel 51 through the air inlets 512 on the edges of the turbine 5, and is concentratedly guided through the fluid channel 51 to the air outlet 511 on one end face of the turbine 5 close to the rotor 3 and the stator 4. The air outlet 511 can blow air in a concentrated manner to the heat source stator 4, thereby dissipating the heat source in a targeted manner, thereby greatly improving the heat dissipation efficiency of the brushless motor.

Specifically, as shown in Figures 3 and 4, the turbine 5 is provided with an outwardly protruding boss 52 at the center of one end surface close to the rotor 3 and the stator 4, the fluid channel 51 is opened on the edges around the boss 52 to form an annular structure, and a shaft hole 521 matching the rotor shaft 31 is opened in the middle of the boss 52, and the turbine 5 is plugged and fixed to the rotor shaft 31 through the shaft hole 521.

In a further solution, as specifically shown in FIG. 4 , the middle portion of the fluid channel 51 contracts inwardly, and the cross-sectional gaps of the air outlet 511 and the air inlet 512 are both larger than the cross-sectional gap of the middle portion of the fluid channel 51 .

The turbine 5 rotates along with the rotor shaft 31. When air enters the fluid channel 51 through the air inlets 512 around the edges of the turbine 5, the middle of the fluid channel 51 contracts inward, and an airflow of the same flow enters a smaller gap. The airflow can be concentratedly compressed and pressurized in the middle of the fluid channel 51. The airflow can obtain a greater release speed based on the increased pressure, so that when the airflow is discharged from the air outlet 511 close to one end surface of the rotor 3 and the stator 4, the flow rate can be increased, and the blowing speed of the turbine 5 is further increased, thereby improving the blowing effect of the turbine 5 on the stator 4 and greatly improving the heat dissipation efficiency of the brushless motor.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims (6)

1. The utility model provides a brushless motor with heat dissipation turbine, includes shell, rotor and stator, and shell and stator are cylindric hollow structure, and the shell cover is connected and is fixed on the surface of stator, and the both ends of rotor are the rotor shaft that extends to both ends, and the middle part of rotor is pegged graft in the inside of stator, and the rotor carries out rotationally with the shell through the rotor shaft and is connected its characterized in that: the inside of shell still is equipped with the turbine, and the turbine is discoid structure, and the center of turbine sets up in the middle part of the rotor shaft of wherein one end, and the inside of turbine is equipped with hollow structure's fluid channel, and fluid channel's one end is the air outlet, and the air outlet is seted up and is close to the one end face of rotor and stator in the turbine, and fluid channel's the other end is the air intake, and the air intake is seted up at the edge all around of turbine, and fluid channel's inside still is equipped with a plurality of blades.

2. A brushless motor having a heat dissipating turbine as defined in claim 1, wherein: the turbine is close to the center of a rotor and a stator terminal surface and is equipped with outside bellied boss, and fluid passage sets up and is annular structure in the edge all around of boss, and the middle part of boss has seted up with rotor shaft assorted pivot hole, and the turbine is pegged graft fixedly through pivot hole and rotor shaft.

3. A brushless motor having a heat dissipating turbine as defined in claim 1, wherein: the middle part of the fluid channel is contracted inwards, and the section gaps of the air outlet and the air inlet are larger than the section gaps of the middle part of the fluid channel.

4. A brushless motor having a heat dissipating turbine as defined in claim 1, wherein: the blades are spirally distributed along the center of the turbine towards the air inlet, one ends of the blades extend to the air outlet, and the other ends of the blades extend to the air outlet.

5. A brushless motor having a heat dissipating turbine according to any one of claims 1-4, wherein: one end of the shell is a detachable end cover, two ends of the rotor shaft are respectively rotatably connected with the center of the end cover and the end part of the shell through bearings, and one end of the rotor shaft far away from the end cover can extend to the outer side of the end part of the shell.

6. A brushless motor having a heat dissipating turbine as defined in claim 5, wherein: the stator comprises a plurality of groups of coil windings and an iron core frame, the plurality of groups of coil windings are respectively wound around the iron core frame, the inner side face of the end cover is further provided with a wiring board body, the wiring board body is electrically connected with the corresponding coil windings, and the shell is sleeved on the surface of the iron core frame.