CN113890271B

CN113890271B - Heat radiating device of brushless motor

Info

Publication number: CN113890271B
Application number: CN202111280776.XA
Authority: CN
Inventors: 应成炯
Original assignee: Suzhou Fugna Mechatronics Co ltd
Current assignee: Suzhou Fugna Mechatronics Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-12-23
Anticipated expiration: 2041-11-01
Also published as: CN113890271A

Abstract

The invention discloses a heat dissipation device of a brushless motor, which comprises a head shell, a heat dissipation device, a promotion device, an adjusting device, a middle shell and a barrel, wherein the heat dissipation device structurally comprises a first magnetic block, a power coil, a rotating shaft sleeve, fan blades and a water cooling device, the rotating shaft sleeve is rotatably connected to the inner part of the head shell in the axial direction, the first magnetic block is fixedly connected to the inner side of the rotating shaft sleeve in the axial direction, the power coil is fixedly installed on the inner side of the first magnetic block in the axial direction, and the fan blades are fixedly connected to the outer side of the rotating shaft sleeve in the axial direction. This brushless motor's heat abstractor through the cooperation between ring channel, hole groove and the flabellum, has realized when will rotating the axle sleeve and rotate and the inside wall mutual contact friction of well casing produces the heat outwards distributes away through the hole groove by wind-force purpose, and then has reached preliminary forced air cooling radiating effect, has solved simultaneously by not having the not good problem of radiating effect that causes the heat dissipation to each part pertinence heat dissipation.

Description

Heat radiator for brushless motor

Technical Field

The invention relates to the technical field of brushless motors, in particular to a heat dissipation device of a brushless motor.

Background

The brushless direct current motor adopts a semiconductor switching device to realize electronic commutation, and further changes the traditional mode of realizing electronic commutation by a brush motor contact type commutator and an electric brush.

The prior heat dissipation device of the brushless motor mainly has the following technical defects: firstly, the traditional air cooling heat dissipation mode does not have the function of dissipating heat of each part in a targeted manner, so that the heat dissipation effect is poor, the phenomenon of accelerated aging of internal electric devices exists, the working efficiency of the motor is reduced, meanwhile, the power of the motor determines the generated heat, the heat dissipation force is kept unchanged, and further, the efficient heat dissipation cannot be realized; and secondly, the air cooling mode is replaced by the water cooling mode, and the water cooling circulation is arranged inside the motor, so that the circulation distance is too short, heat in water is not timely transferred out, the result of high-temperature water flow circulation is caused, and the electric device in the motor is seriously damaged.

Disclosure of Invention

Technical problem to be solved

The present invention is directed to a heat dissipation device for a brushless motor, so as to solve the problems of the related art.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a heat dissipation device of a brushless motor comprises a head shell, a heat dissipation device, a promotion device, an adjusting device, a middle shell and a cylinder, wherein the heat dissipation device is installed on the axial inner side of the head shell;

the structure of the heat dissipation device comprises a first magnetic block, a power coil, a rotating shaft sleeve, fan blades and a water cooling device, wherein the rotating shaft sleeve is rotatably connected to the inner axial part of the head shell, the first magnetic block is fixedly connected to the inner axial side of the rotating shaft sleeve, the power coil is fixedly installed on the inner axial side of the first magnetic block, the fan blades are fixedly connected to the outer axial side of the doing part of the rotating shaft sleeve, the power coil generates magnetic force for pushing the first magnetic block to rotate around the power coil in the outer axial direction through direct current, then the first magnetic block drives the rotating shaft sleeve fixedly connected with the first magnetic block to synchronously rotate, so that the rotating shaft sleeve drives the external equipment to work, the fan blades are fixedly connected to the outer axial side of the left end part of the rotating shaft sleeve, so that the fan blades rotate synchronously along with the rotating shaft sleeve, and the water cooling device is fixedly installed on the right side of the power coil;

the fan blades are positioned in the head shell, and a cylindrical hole corresponding to the left end part of the rotating shaft sleeve is formed in the head shell.

Further, water cooling plant's structure includes first baffle, heat dissipation square hole, annular water pipe, second baffle and water pump, the first baffle of right side fixedly connected with of power coil, the heat dissipation square hole has been seted up on the first baffle, the internally mounted of barrel has annular water pipe, and when power coil passed through into direct current, the rivers that start the water pump in with the annular water pipe circulated and flow, owing to set up the heat dissipation square hole corresponding with power coil on the first baffle for power coil passes through the inside rivers of heat dissipation square hole transmission annular water pipe in the a large amount of heats that produce after letting in current, then the rivers drive the heat through the effect of water pump and circulate and flow. The right side of the annular water pipe is fixedly connected with a water pump, and the right side of the barrel is fixedly connected with a second partition plate;

six first partition plates are arranged in the axial direction at equal intervals;

six annular water pipes are arranged in the axial direction of the barrel body at equal intervals.

Further, the promotion device includes air guide block, connecting pipe, cold wind room, rectangular channel, exchange room and through-hole the right side fixedly connected with air guide block of head casing, the right side fixedly connected with cold wind room of air guide block, a plurality of rectangular channel that the distribution is even has been seted up to the right-hand member inboard of cold wind room, when the flabellum produced wind-force and blows to the right side by the left side that rotates the axle sleeve, part wind-force flows into in the cold wind room through the interior hopper that the air guide block set up, because there is the trend that reduces gradually in the opening size of cold wind room from left to right, the air passes through the aperture from the macropore, the air pressure increases, the density increases, with aperture wall coefficient of heat conductivity increase, because the aperture wall heat dissipation, make the air temperature reduce, through the effect of the inside rectangular channel of multistage cold wind room and cold wind room, make the connecting pipe flow temperature that flows into in the exchange room lower, then cool down to the inside annular water pipe rivers in the exchange room, and then reach the effect that can carry out rapid cooling to circulation rivers.

A plurality of cold air chambers are arranged at equal intervals on the axial outer side surfaces of the middle shell and the barrel; the right side of the second clapboard is fixedly connected with an exchange chamber,

a connecting pipe is fixedly connected between the adjacent cold air chambers, and the end part of the connecting pipe extends into the exchange chamber;

six through-holes that the equidistance distributes are seted up on the exchange room, the right-hand member portion of annular water pipe is located the inboard of exchange room with the water pump.

Furthermore, the adjusting device comprises a rectangular shell, a sliding rheostat, a sensing coil, a second magnetic block, a shifting block and a spring, wherein the rectangular shell is fixedly connected to the inner axial side wall of the barrel, the sliding rheostat is fixedly connected to the bottom surface inside the rectangular shell, the sensing coil is fixedly connected to the left side surface inside the rectangular shell, the shifting block is slidably connected to the upper side surface of the sliding rheostat, when the magnitude of direct current led into the power coil changes, the sensing coil and the power coil are electrically connected, so that the magnitude of current in the sensing coil can synchronously change along with the magnitude of current of the power coil, the sensing coil generates repulsive force to the second magnetic block to change along with the forward direction, the shifting block is driven to slide on the sliding rheostat, the internal resistance value of the sliding rheostat is changed, the magnitude of current led into the water pump can be positively changed according to the magnitude of current led into the power coil due to the fact that the sliding rheostat and the water pump are electrically connected, namely, the magnitude of the water flow rate of water flow in the annular water pipe can be positively regulated and controlled according to the magnitude of the rotation frequency of the generated heat, and the heat dissipation degree can be positively regulated.

The left side surface of the shifting block is fixedly connected with a second magnetic block, and a spring is fixedly connected between the right side surface of the shifting block and the right side wall of the interior of the rectangular shell;

the slide rheostat is electrically connected with the water pump, and the sensing coil is electrically connected with the power coil;

further, well casing spare includes well casing, ring channel and hole groove, casing in the fixedly connected with between air guide block and the first baffle, set up a plurality of ring channel that distributes evenly on the axial inside wall of well casing, set up the hole groove on the well casing, the axial outside fixedly connected with flabellum of the left end portion of rotation axle sleeve for the flabellum follows the rotation axle sleeve and rotates in step, again because the produced wind direction of flabellum is transmitted by the left side looks right side of rotation axle sleeve, make partial wind-force blow to rotation axle sleeve department through the intermediate channel of air guide block, because the inside wall in the rotation of rotation axle sleeve and well casing contact friction each other when rotating, and then produce a large amount of heat, again because a plurality of ring channel has been seted up to the inside wall of well casing, make wind-force can and then arrive in the ring channel, a plurality of hole groove seted up on the well casing, the heat that produces with the inside wall in the casing contact friction each other when rotating the axle sleeve rotation is outwards distributed through the hole groove by wind-force. The hole grooves are distributed in a plurality of positions with equal distance in relation to the axial direction of the middle shell.

Furthermore, adjusting device is provided with six with the inside equidistance of axial of barrel, first magnetic path is provided with two with the inboard equidistance of axial of rotating the axle sleeve.

Furthermore, a groove corresponding to the annular water pipe is formed in the first partition plate, and the annular water pipe penetrates through the second partition plate and extends into the right side of the second partition plate.

Furthermore, an inner concave hopper is arranged on the right side of the air guide block, and an opening corresponding to the cold air chamber is formed in the right side wall of the air guide block.

Furthermore, the rotating wind direction of the fan blades moves from the left side to the right side of the rotating shaft sleeve.

(III) advantageous effects

Compared with the prior art, the invention provides a heat dissipation device of a brushless motor, which has the following beneficial effects:

1. this brushless motor's heat abstractor through the cooperation between ring channel, hole groove and the flabellum, has realized when will rotating the axle sleeve and rotate and the inside wall mutual contact friction of well casing produces the heat outwards distributes away through the hole groove by wind-force purpose, and then has reached preliminary forced air cooling radiating effect, has solved simultaneously by not having the not good problem of radiating effect that causes the heat dissipation to each part pertinence heat dissipation.

2. This brushless motor's heat abstractor through the mutually supporting between heat dissipation square hole, annular water pipe and the water pump, has realized the outside purpose of effluvium of heat to power coil department, and then has reached categorised radiating effect, has solved simultaneously by the low problem of traditional forced air cooling heat dissipation efficiency, and then has avoided inside electrical part to age with higher speed, has improved the work efficiency of motor simultaneously.

3. This brushless motor's heat abstractor through the mating reaction between coil, second magnetic path, slide rheostat and the water pump, and then has realized the purpose of the speed size of rivers in the regulation and control annular water pipe of the rotational frequency size forward through the motor, has reached the effect through produced heat size forward regulation radiating degree simultaneously, and then has solved and has kept unchangeable the radiating problem that can not high-efficiently caused by the heat dissipation dynamics.

4. This brushless motor's heat abstractor, through the mating reaction between wind guide block, cold wind room, rectangular channel and the connecting pipe, and then realized carrying out the purpose of cooling to rivers in the annular water pipe, solved simultaneously and caused the problem that the aquatic heat was not in time transmitted away by the circulating distance short, avoided causing the consequence of high temperature rivers circulation, prevented that the inside electrical part of motor from causing serious damage.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic perspective view of a cooling chamber according to the present invention;

FIG. 3 is a schematic perspective view of the rotating sleeve of the present invention;

FIG. 4 is a schematic perspective view of the air guide block of the present invention;

FIG. 5 is a schematic perspective view of the housing of the present invention;

FIG. 6 is a schematic perspective view of a power coil according to the present invention;

FIG. 7 is a schematic perspective view of an adjustment device according to the present invention;

fig. 8 is a schematic perspective view of the water cooling apparatus of the present invention.

In the figure: 1. a head housing; 2. a heat-dissipating device; 21. a first magnetic block; 22. a power coil; 23. rotating the shaft sleeve; 24. a fan blade; 25. a water cooling device; 251. a first separator; 252. a heat dissipation square hole; 253. an annular water pipe; 254. a second separator; 255. a water pump; 3. a facilitating device; 31. a wind guide block; 32. a connecting pipe; 33. a cold air chamber; 34. a rectangular groove; 35. an exchange chamber; 36. a through hole; 4. an adjustment device; 41. a rectangular housing; 42. a slide rheostat; 43. a sense coil; 44. a second magnetic block; 45. shifting blocks; 46. a spring; 5. a middle shell member; 51. a middle shell; 52. an annular groove; 53. and (4) a hole groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1-8, a heat dissipation device for a brushless motor includes a head housing 1, a heat dissipation device 2, a promotion device 3, an adjustment device 4, a middle housing 5, and a cylinder, wherein the heat dissipation device 2 is installed on an axial inner side of the head housing 1, the promotion device 3 is fixedly connected to a right side of the head housing 1, the middle housing 5 is fixedly connected to a right side of the promotion device 3, the cylinder is installed on the axial inner side of the promotion device 3 and located on the right side of the middle housing 5, and the adjustment device 4 is fixedly connected to an axial inner side wall of the cylinder;

the structure of the heat dissipating device 2 comprises a first magnetic block 21, a power coil 22, a rotating shaft sleeve 23, fan blades 24 and a water cooling device 25, wherein the rotating shaft sleeve 23 is rotatably connected to the inner side of the head shell 1 in the axial direction, the first magnetic block 21 is fixedly connected to the inner side of the rotating shaft sleeve 23 in the axial direction, the power coil 22 is fixedly installed on the inner side of the first magnetic block 21 in the axial direction, the fan blades 24 are fixedly connected to the outer side of the rotating shaft sleeve 23 in the axial direction, the power coil 22 generates magnetic force for pushing the first magnetic block 21 to rotate around the outer side of the power coil 22 in the axial direction through direct current, then the first magnetic block 21 drives the rotating shaft sleeve 23 fixedly connected with the first magnetic block to synchronously rotate, the rotating shaft sleeve 23 drives external equipment to work, the fan blades 24 are fixedly connected to the outer side of the left end part of the rotating shaft sleeve 23 in the axial direction, the fan blades 24 can synchronously rotate along with the rotating shaft sleeve 23, and the water cooling device 25 is fixedly installed on the right side of the power coil 22;

the fan blades 24 are located inside the head housing 1, and the head housing 1 is provided with a cylindrical hole corresponding to the left end of the rotating shaft sleeve 23.

Further, the structure of the water cooling device 25 includes a first partition plate 251, a heat dissipation square hole 252, an annular water pipe 253, a second partition plate 254 and a water pump 255, the first partition plate 251 is fixedly connected to the right side of the power coil 22, the heat dissipation square hole 252 is formed in the first partition plate 251, the annular water pipe 253 is installed inside the cylinder, the power coil 22 is in direct current flowing, the water pump 255 is started to circulate water in the annular water pipe 253, the heat dissipation square hole 252 corresponding to the power coil 22 is formed in the first partition plate 251, a large amount of heat generated by the power coil 22 after current is introduced is transferred to the water inside the annular water pipe 253 through the heat dissipation square hole 252, and then the water flows through the water pump 255 to drive the heat to circulate. The right side of the annular water pipe 253 is fixedly connected with a water pump 255, and the right side of the cylinder is fixedly connected with a second partition plate 254;

six first partition plates 251 are arranged at equal intervals in the axial direction;

the annular water tubes 253 are arranged in six at equal intervals about the axially inner portion of the cylinder.

Further, the promotion device 3 includes the air guide block 31, the connecting pipe 32, the cold air chamber 33, the rectangular groove 34, the right side fixedly connected with air guide block 31 of the head casing 1 of the exchange chamber 35 and the through hole 36, the right side fixedly connected with cold air chamber 33 of the air guide block 31, a plurality of rectangular grooves 34 which are evenly distributed are opened on the inner side of the right end portion of the cold air chamber 33, when the fan blades 24 generate wind power and blow from the left side to the right side of the rotating shaft sleeve 23, part of the wind power flows into the cold air chamber 33 through the inner concave hopper arranged on the air guide block 31, because the opening size of the cold air chamber 33 gradually decreases from left to right, the air passes through the small holes from the large holes, the air pressure is increased, the density is increased, and the heat conductivity coefficient of the small hole walls is increased, because the heat dissipation of the small hole walls reduces the air temperature, the air temperature is lower through the effect of the rectangular grooves 34 inside the multi-section cold air chamber 33 and the cold air chamber 33, the air flow temperature of the air flowing into the connecting pipe 32 in the exchange chamber 35 is lower, then the water flow in the annular water pipe 253 in the exchange chamber 35 is cooled down, and the effect of rapidly cooling down the circulating water flow is achieved.

A plurality of cold air chambers 33 are arranged at equal intervals around the middle shell 51 and the axial outer side surface of the cylinder; the exchange chamber 35 is fixedly connected to the right side of the second partition 254,

a connecting pipe 32 is fixedly connected between the adjacent cold air chambers 33, and the end part of the connecting pipe 32 extends into the exchange chamber 35;

six through holes 36 distributed at equal intervals are formed in the exchange chamber 35, and the right end of the annular water pipe 253 and the water pump 255 are located on the inner side of the exchange chamber 35.

Further, the adjusting device 4 includes a rectangular housing 41, a sliding rheostat 42, a sensing coil 43, a second magnetic block 44, a shifting block 45 and a spring 46, the rectangular housing 41 is fixedly connected to the axial inner side wall of the cylinder, the sliding rheostat 42 is fixedly connected to the inner bottom surface of the rectangular housing 41, the sensing coil 43 is fixedly connected to the inner left side surface of the rectangular housing 41, the shifting block 45 is slidably connected to the upper side surface of the sliding rheostat 42, when the magnitude of the direct current flowing into the power coil 22 changes, the sensing coil 43 is electrically connected to the power coil 22, so that the magnitude of the current in the sensing coil 43 changes synchronously along with the magnitude of the current in the power coil 22, the repulsive force generated by the sensing coil 43 on the second magnetic block 44 changes along with the positive direction, the shifting block 45 is driven to slide on the sliding rheostat 42, so as to change the internal resistance of the sliding rheostat 42, and the magnitude of the current flowing into the water pump 255 is changed according to the magnitude of the current flowing into the power coil 22, that the magnitude of the current flowing into the water pump 255 is changed positively, that the magnitude of the annular water pipe 253 is adjusted by the rotational frequency of the motor positively generated heat, and the heat dissipation degree of the water flow is small.

A second magnetic block 44 is fixedly connected to the left side surface of the shifting block 45, and a spring 46 is fixedly connected between the right side surface of the shifting block 45 and the right side wall of the interior of the rectangular shell 41;

the slide rheostat 42 is electrically connected with the water pump 255, and the sensing coil 43 is electrically connected with the power coil 22;

further, the middle shell 5 includes a middle shell 51, annular grooves 52 and hole grooves 53, the middle shell 51 is fixedly connected between the air guide block 31 and the first partition 251, a plurality of evenly distributed annular grooves 52 are formed on the axial inner side wall of the middle shell 51, the hole grooves 53 are formed on the middle shell 51, and fan blades 24 are fixedly connected to the axial outer side of the left end portion of the rotating shaft sleeve 23, so that the fan blades 24 rotate synchronously along with the rotating shaft sleeve 23, and because the wind generated by the fan blades 24 is transmitted from the left side to the right side of the rotating shaft sleeve 23, part of the wind is blown to the rotating shaft sleeve 23 through the middle channel of the air guide block 31, because the rotating shaft sleeve 23 is in contact friction with the inner side wall of the middle shell 51 when rotating, a large amount of heat is generated, and because the inner side wall of the middle shell 51 is provided with a plurality of annular grooves 52, the wind can further enter the annular grooves 52, the hole grooves 53 are formed in the middle shell 51, and the heat generated by the contact friction with the inner side wall of the middle shell 51 when the rotating shaft sleeve 23 rotates is radiated outside through the hole grooves 53. The hole slots 53 are equally distributed in number with respect to the axial direction of the middle housing 51.

Further, the adjusting device 4 is provided with six equally spaced portions with respect to the axial inner side of the cylinder, and the first magnetic blocks 21 are provided with two equally spaced portions with respect to the axial inner side of the rotating sleeve 23.

Furthermore, the first partition 251 is provided with a slot corresponding to the annular water pipe 253, and the annular water pipe 253 penetrates through the second partition 254 and extends into the right side of the second partition 254.

Furthermore, an inner concave hopper is arranged on the right side of the air guide block 31, and an opening corresponding to the cold air chamber 33 is formed in the right side wall of the air guide block 31.

Further, the rotating wind of the fan blades 24 moves from the left side to the right side of the rotating sleeve 23.

The specific use mode and function of the embodiment are as follows:

when the wind power generator is used, direct current is introduced into the power coil 22, so that the power coil 22 generates magnetic force for pushing the first magnetic block 21 to rotate around the axial outer side of the power coil 22, then the first magnetic block 21 drives the fixedly connected rotating shaft sleeve 23 to synchronously rotate, so that the rotating shaft sleeve 23 drives the external equipment to work, because the axial outer side of the left end part of the rotating shaft sleeve 23 is fixedly connected with the fan blade 24, the fan blade 24 rotates along with the rotating shaft sleeve 23 synchronously, and because the wind direction generated by the fan blade 24 is transmitted from the left side to the right side of the rotating shaft sleeve 23, part of the wind power is blown to the rotating shaft sleeve 23 through the middle channel of the wind guide block 31, as the rotating shaft sleeve 23 rotates, the rotating shaft sleeve 23 is in contact friction with the inner side wall of the middle shell 51, a large amount of heat is generated, and because the wind power can enter the annular groove 52, the plurality of hole grooves 53 formed in the middle shell 51, and the heat generated by the contact friction with the inner side wall of the middle shell 51 when the rotating shaft sleeve 23 rotates is radiated outwards through the hole grooves 53.

Further, when the power coil 22 passes through the direct current, the water pump 255 is started to circulate the water flow in the annular water pipe 253, and since the first partition plate 251 is provided with the heat dissipation square hole 252 corresponding to the power coil 22, a large amount of heat generated by the power coil 22 after the current is introduced is transferred to the water flow inside the annular water pipe 253 through the heat dissipation square hole 252, and then the water flow drives the heat to circulate through the action of the water pump 255.

Further, when the magnitude of the direct current flowing into the power coil 22 changes, the sensing coil 43 is electrically connected to the power coil 22, so that the magnitude of the current in the sensing coil 43 changes synchronously with the magnitude of the current in the power coil 22, and the repulsive force generated by the sensing coil 43 on the second magnetic block 44 changes in a forward direction, so as to drive the shifting block 45 to slide on the slide rheostat 42, thereby changing the internal resistance of the slide rheostat 42.

Furthermore, when wind generated by the fan blades 24 blows from the left side to the right side of the rotating shaft sleeve 23, part of the wind flows into the cold air chamber 33 through the inner concave hopper arranged on the air guide block 31, because the size of the opening of the cold air chamber 33 gradually decreases from left to right, air passes through the small holes from the large holes, the air pressure is increased, the density is increased, the heat conductivity coefficient of the small holes is increased, because the small holes are used for heat dissipation, the air temperature is reduced, the air temperature is lower when the air passes through the multi-section cold air chamber 33 and the rectangular grooves 34 in the cold air chamber 33, the temperature of air flow flowing into the exchange chamber 35 from the connecting pipe 32 is lower, then the water flow in the annular water pipe 253 in the exchange chamber 35 is cooled, and the effect of rapidly cooling the circulating water flow is achieved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A brushless motor's heat abstractor, includes head casing (1), drives heat facility (2), promotes device (3), adjusting device (4), mesochite (5) and barrel, its characterized in that: the heat dissipation device (2) is installed on the axial inner side of the head shell (1), the promoting device (3) is fixedly connected to the right side of the head shell (1), the middle shell piece (5) is fixedly connected to the right side of the promoting device (3), the barrel is installed on the axial inner side of the promoting device (3) and located on the right side of the middle shell piece (5), and the adjusting device (4) is fixedly connected to the axial inner side wall of the barrel;

the structure of the heat dissipation device (2) comprises a first magnetic block (21), a power coil (22), a rotating shaft sleeve (23), fan blades (24) and a water cooling device (25), wherein the rotating shaft sleeve (23) is rotatably connected to the inner axial portion of the head shell (1), the first magnetic block (21) is fixedly connected to the inner axial side of the rotating shaft sleeve (23), the power coil (22) is fixedly installed on the inner axial side of the first magnetic block (21), the fan blades (24) are fixedly connected to the outer axial side of the part of the rotating shaft sleeve (23), and the water cooling device (25) is fixedly installed on the right side of the power coil (22);

the fan blades (24) are positioned in the head shell (1), and a cylindrical hole corresponding to the left end part of the rotating shaft sleeve (23) is formed in the head shell (1);

the promotion device (3) comprises an air guide block (31), a connecting pipe (32), a cold air chamber (33), rectangular grooves (34), an exchange chamber (35) and through holes (36), the air guide block (31) is fixedly connected to the right side of the head shell (1), the cold air chamber (33) is fixedly connected to the right side of the air guide block (31), a plurality of rectangular grooves (34) which are uniformly distributed are formed in the inner side of the right end of the cold air chamber (33), and the cold air chamber (33) is equidistantly provided with a plurality of rectangular grooves relative to the axial outer side faces of the middle shell (51) and the barrel; the right side of the second partition plate (254) is fixedly connected with an exchange chamber (35);

a connecting pipe (32) is fixedly connected between the adjacent cold air chambers (33), and the end part of the connecting pipe (32) extends into the exchange chamber (35);

the water cooling device (25) structurally comprises a first partition plate (251), a heat dissipation square hole (252), an annular water pipe (253), a second partition plate (254) and a water pump (255), the right side of the power coil (22) is fixedly connected with the first partition plate (251), the heat dissipation square hole (252) is formed in the first partition plate (251), the annular water pipe (253) is installed in the cylinder, the water pump (255) is fixedly connected to the right side of the annular water pipe (253), and the second partition plate (254) is fixedly connected to the right side of the cylinder;

six first partition plates (251) are axially and equidistantly arranged;

the annular water pipes (253) are arranged in six positions in the axial direction of the barrel at equal intervals;

six through holes (36) which are distributed at equal intervals are formed in the exchange chamber (35), and the right end part of the annular water pipe (253) and the water pump (255) are positioned on the inner side of the exchange chamber (35);

the adjusting device (4) comprises a rectangular shell (41), a sliding rheostat (42), a sensing coil (43), a second magnetic block (44), a shifting block (45) and a spring (46), wherein the axial inner side wall of the barrel is fixedly connected with the rectangular shell (41), the inner bottom surface of the rectangular shell (41) is fixedly connected with the sliding rheostat (42), the inner left side surface of the rectangular shell (41) is fixedly connected with the sensing coil (43), the upper side surface of the sliding rheostat (42) is slidably connected with the shifting block (45), the left side surface of the shifting block (45) is fixedly connected with the second magnetic block (44), and the spring (46) is fixedly connected between the right side surface of the shifting block (45) and the inner right side wall of the rectangular shell (41);

the slide rheostat (42) is electrically connected with the water pump (255), and the sensing coil (43) is electrically connected with the power coil (22).

2. The heat dissipating apparatus of a brushless motor according to claim 1, wherein: well casing spare (5) include well casing (51), ring channel (52) and hole groove (53), casing (51) in the fixedly connected with between air guide block (31) and first baffle (251), set up a plurality of ring channel (52) that distribute evenly on the axial inside wall of well casing (51), set up hole groove (53) on well casing (51), hole groove (53) have a plurality of about the axial equidistance distribution of well casing (51).

3. The heat dissipating apparatus of a brushless motor according to claim 1, wherein: adjusting device (4) are provided with six with regard to the axial inside equidistance of barrel, first magnetic path (21) are provided with two with regard to the axial inboard equidistance of rotation axle sleeve (23).

4. The heat dissipating apparatus of a brushless motor according to claim 2, wherein: the first partition plate (251) is provided with a groove corresponding to the annular water pipe (253), and the annular water pipe (253) penetrates through the second partition plate (254) and extends into the right side of the second partition plate (254).

5. The heat dissipating device for a brushless motor according to claim 1, wherein: an inner concave hopper is arranged on the right side of the air guide block (31), and an opening corresponding to the cold air chamber (33) is formed in the right side wall of the air guide block (31).

6. The heat dissipating apparatus of a brushless motor according to claim 1, wherein: the rotating wind direction of the fan blades (24) moves from the left side of the rotating shaft sleeve (23) to the right side.