CN115912841A

CN115912841A - Permanent magnet inner rotor direct-drive motor with internal circulation heat dissipation function

Info

Publication number: CN115912841A
Application number: CN202211513453.5A
Authority: CN
Inventors: 王琪华; 黄忠念
Original assignee: Nanjing Magnet Intelligent Technology Co ltd
Current assignee: Nanjing Magnet Intelligent Technology Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-04-04

Abstract

The invention discloses a permanent magnet inner rotor direct drive motor with internal circulation heat dissipation, which comprises an internal circulation assembly and a cooling assembly, wherein the internal circulation assembly comprises a stator, a rotor and a rotor core; the inner circulation subassembly sets up the tail end at the rotor, and the inner of inner circulation subassembly is connected with the pivot of rotor, and the outer end is fixed with motor casing through the retainer plate, and cooling module sets up at the tail end of inner circulation subassembly, and cooling module is connected with motor casing, and cooling module reduces the inside temperature of motor through the fluid circulation of inside. The advantage adopts the mode that oil cooling and forced air cooling combine to cool off motor inside, and cooling efficiency is high, and the closure is better.

Description

Permanent magnet inner rotor direct-drive motor with internal circulation heat dissipation function

Technical Field

The invention relates to a permanent magnet inner rotor direct drive motor with internal circulation heat dissipation.

Background

Compared with an induction motor, the permanent magnet direct drive motor does not need reactive exciting current, can obviously improve power factor, reduce stator current and stator loss, has no rotor resistance loss during stable operation, and has certain superiority in the aspects of working efficiency and energy efficiency level.

In the permanent magnetism direct drive motor working process, the inside a large amount of heats that can produce of motor, the heat is piled up and to be made the work efficiency and the safe in utilization of motor receive the influence, consequently in order to increase the life of motor, need dispel the heat to the inside of motor at the motor during operation.

In Chinese patent: 202210568984.8, the invention is: a direct drive permanent magnet electric machine, is described with: a direct-drive permanent magnet motor comprises a motor water-cooling shell assembly, wherein the motor water-cooling shell assembly comprises a motor shell and a water-cooling sealing cylinder, a motor cavity is formed in the motor shell, the water-cooling sealing cylinder is inserted in the motor cavity, and a water circulation water-cooling cavity is formed between the outer wall of the water-cooling sealing cylinder and the inner wall of the motor cavity so as to cool the motor shell and the water-cooling sealing cylinder by water cooling; the stator winding cylinder penetrates through the water-cooling sealing cylinder, a winding groove is formed in the inner wall of the stator winding cylinder, a copper wire is wound through the winding groove, and the outer wall of the stator winding cylinder is in contact with the inner wall of the water-cooling sealing cylinder so that heat of the stator winding cylinder is conducted to the water-cooling sealing cylinder; the air cooling rotor assembly is arranged in the stator winding barrel and comprises a permanent magnet mounting barrel, a plurality of permanent magnets are detachably mounted on the circumference of the permanent magnet mounting barrel in a surrounding mode, a shaft hole penetrates through the center shaft of the permanent magnet mounting barrel, a rotating shaft is connected in the shaft hole in a clamping mode, air grooves are formed in two ends of the permanent magnet mounting barrel, communicated air channels are formed in the air grooves in the two ends and used for inputting air flow, and the air channels are communicated with the shaft hole and the permanent magnets respectively, so that the heat of the permanent magnet mounting barrel is cooled through air cooling while being cooled through a water cooling sealing barrel; the outer wall of the permanent magnet installation cylinder is provided with a plurality of permanent magnet installation grooves for installing permanent magnets, permanent magnet radiating holes are formed in the permanent magnet installation grooves, first radiating holes corresponding to the permanent magnet installation grooves are formed in the permanent magnets, and the permanent magnet radiating holes are communicated with the air duct.

This design is through fan and pivot synchronous rotation, realizes the inside and outside circulation of motor to accelerate radiating efficiency, but the drawback of this design lies in: in the heat dissipation process, dust in the outside air can gather on the inside filter screen of motor in a large number, and the work efficiency of motor can be influenced to the dust jam filter screen after using for a period of time.

SUMMARY OF THE PATENT FOR INVENTION

The invention aims to solve the problem that heat generated by a motor during working cannot be quickly dissipated, and the dustproof effect in the motor is ensured while heat dissipation is realized.

The invention is realized by the following technical scheme: the motor comprises a rotor, a motor shell, an outer stator and a front cover, wherein the rotor is sleeved inside the outer stator, the motor shell wraps the outer stator, and the front end of the motor shell is fixedly connected with the front cover; the cooling system also comprises an internal circulation assembly and a cooling assembly; the inner loop subassembly sets up the tail end at the rotor, and the pivot of rotor passes the inner loop subassembly and forms to rotate with the inner loop subassembly and be connected, and the inner loop subassembly is fixed with motor casing, and cooling module sets up at the tail end of inner loop subassembly, cooling module and motor casing fixed connection, and cooling module reduces the inside temperature of motor through inside fluid circulation.

The internal circulation component realizes gas circulation inside the motor through the rotation work of the rotating shaft of the motor, and cools air inside the motor through oil circulation inside the cooling component.

According to the optimization of the technical scheme of the invention, the internal circulation assembly comprises four fans, a fixed ring and gears; the inner loop subassembly passes through the retainer plate to be fixed with motor casing, and the gear is located the middle part of inner loop subassembly and is connected with the pivot of rotor, and four fans are the cross and arrange the setting in the outer end of gear and with gear engagement for the outer end of inner loop subassembly is rotated with four fans to fixed retainer plate setting, and the retainer plate is connected through the rotation of four fans and the inside air cycle of cooperation realization motor.

The circulation of inside air is realized through four fans to the inner loop subassembly, and the gear drives four fans as drive assembly and rotates, and the inner loop subassembly is realized with the cooperation of motor casing to the retainer plate fixed.

Preferably, the four fans of the internal circulation assembly rotate in opposite directions relative to the other two fans, and gear teeth matched with the gears are arranged at the outer ends of the four fans in a surrounding manner.

Wherein the flabellum of two fans sets up in reverse, can guarantee that the fan realizes the circulation in the equidirectional air at the during operation.

Preferably, the cooling assembly comprises a heat dissipation ring and an extrusion unit; the heat dissipation ring is arranged at the tail end of the motor and connected with the extrusion unit, the two ends of the heat dissipation ring penetrate into the extrusion unit and are connected with the extrusion unit, the extrusion unit is connected with the motor shell, and the extrusion unit rotates through the rotating shaft to achieve internal oil circulation.

The cooling assembly realizes oil circulation inside the heat dissipation ring through the extrusion unit, and the internal oil is used as a coolant to absorb heat inside the motor.

According to the optimization of the technical scheme of the invention, the extrusion unit comprises an inner rotor, an outer rotor and a fixed shell; the inner rotor is meshed with the outer rotor, and the outer rotor is arranged inside the fixed shell and is in rotating connection with the rotating shaft.

The extrusion unit extrudes the internal oil through the meshing of the inner rotor and the outer rotor, so that the circulation of the internal oil is realized.

Compared with the prior art, the invention has the beneficial effects that:

1. the technical scheme of the invention provides power through the motor, and an external power instrument is not required to be connected.

2. The technical scheme of the invention realizes the circulation in the motor, and does not need to replace the external air during working.

3. According to the technical scheme, the cooling is performed through the oil liquid, so that the cooling efficiency is higher.

Drawings

Fig. 1 is a schematic view of an appearance structure of a rotor and an outer stator of the present invention.

Fig. 2 is a schematic structural diagram of the appearance of the invention.

Fig. 3 is a schematic diagram of the internal structure of the present invention.

FIG. 4 is a schematic view of an internal circulation assembly of the present invention.

Fig. 5 is an appearance structure schematic diagram of the patent fixing ring of the invention.

Fig. 6 is a schematic view of an appearance structure of a fan according to the present invention.

FIG. 7 is a schematic view of an external structure of a heat dissipating ring according to the present invention.

FIG. 8 is a schematic view of the external appearance of the extruding unit of the present invention

FIG. 9 is a schematic view of an appearance structure of the extruding unit and the heat dissipating ring according to the present invention.

FIG. 10 is an internal view of the patented compression unit of the invention.

Fig. 11 is a schematic view of the inventive extruded inner and outer rotors.

Fig. 12 is an exploded view of the present invention patent.

Detailed Description

The technical solution in the patent embodiment of the present invention will be described in detail below with reference to fig. 1 to 12 in the patent embodiment of the present invention.

Example 1

As shown in fig. 1,2,3 and 12, the permanent magnet inner rotor direct drive motor with internal circulation heat dissipation comprises a motor shell 1, an outer stator 2, a rotor 3, an internal circulation assembly 4 and a cooling assembly 5.

Motor casing 1 is cylinder type metal cylinder, be used for connecting and protecting each part, motor casing 1's inside cavity forms a motor chamber, outer stator 2 and rotor 3 set up in the motor chamber, outer stator 2 is fixed on motor casing 1's inner wall and is overlapped in 3 outer ends of rotor, pivot 31 is worn out and is fixed connection with 3 of rotor from 3 middle parts of rotor, inner loop subassembly 4 sets up the tail end at rotor 3, and fixed with motor casing 1 joint, the tail end at inner loop subassembly 4 is set up to cooling module 5, cooling module 5 forms fixed connection through a plurality of screws with motor casing 1's tail end.

As shown in fig. 3,4,5 and 6, the internal circulation assembly 4 includes a gear 43, a stationary ring 42 and four fans 41.

The gear 43 is arranged on the rotating shaft 31 of the rotor 3 and fixedly connected with the rotating shaft 31, the four fans 41 are symmetrically arranged at the outer ends of the gear 43, the outer rings of the four fans 41 are all provided with gear teeth matched with the gear 43 and meshed with the gear 43, the fan blades of the four fans 41 are all arranged inside the fans 41, the corresponding fan blade of each fan 41 is fixedly connected with the middle shaft of the fan 41, the middle shaft is integrally connected with the fan 41 through a plurality of connecting rod pieces extending from the end part of the middle shaft, the fixing ring 42 is provided with an outer ring 422 and an inner ring 421, the inner ring 421 and the outer ring 422 are connected through four symmetrically arranged bar-shaped rods 423, one end of the outer ring 422 close to the rotor 3 is contacted with the end face of the tail end of the motor shell 1 and is matched with the motor shell 1, the inner ring 421 surrounds the outer end of the rotating shaft 31 and has a certain gap with the rotating shaft 31, the four bar-shaped rods 423 are respectively hinged with the middle shafts of the four fans 41, in order to prevent deviation when the gear is meshed with the gear, the thickness of the gear is set to be larger, and the cross-shaped bracket is hinged with the middle shafts of the four fans 41 through a metal rotating shaft.

In order to ensure the circulation of the air inside the motor cavity, the four fans 41 include two forward fans 411 and two reverse fans 412, the two forward fans 411 are adjacent to each other, the two reverse fans 412 are adjacent to each other, the appearance structures of the forward fans 411 and the reverse fans 412 are complete, and the difference is that the reverse fans 412 are reversely arranged relative to the forward fans 411, so that the four fans 41 can be matched with each other when the internal circulation assembly 4 works, the two forward fans 411 blow air to the tail end of the motor cavity, and the two reverse fans 412 blow air to the front end of the motor cavity.

As shown in fig. 7,8,9, 10 and 11, the cooling module 5 includes a heat-dissipating ring 51 and a pressing unit 52.

The outer end of the inner circulation component 4 is provided with a heat dissipation ring 51, the material of the heat dissipation ring is a socket-shaped pipeline made of heat-conducting silica gel, the heat dissipation ring is arranged between the motor shell 1 and the extrusion unit 52, the two ends of the heat dissipation ring 51 penetrate through the extrusion unit 52 through an oil outlet pipeline 526 and an oil inlet pipeline 525 arranged on the extrusion unit 52, the extrusion unit 52 is communicated with the inside of the extrusion unit 52, the heat dissipation ring 51 is fixedly connected with the extrusion unit 52 through a pipeline stretching into the inside of the extrusion unit 52, a leakage-proof gasket is arranged between the heat dissipation ring 51 and the extrusion unit 52, and the inside oil of the extrusion unit 52 is prevented from leaking into the motor through the oil outlet pipeline 526 or the oil inlet pipeline 525, so that the work of the motor is influenced.

The pressing unit 52 includes an inner rotor 521, an outer rotor 522, and a fixed case 523.

The fixed shell 523 encloses the inner rotor 521 and the outer rotor 522, the inner rotor 521 and the outer rotor 522 are separated from the heat dissipation ring 51, meanwhile, the fixed shell 523 also serves as a rear cover of the motor to separate a motor cavity from the outside, the heat dissipation ring 51 is introduced into the fixed shell 523 through an oil outlet pipeline 526 and an oil inlet pipeline 525 formed in the fixed shell 523, the fixed shell 523 and the tail end face of the motor housing 1 form fixed connection through a plurality of screws, the inner rotor 521 is a gear, the rotating shaft 31 penetrates through the middle of the inner rotor 521 to be connected with the inner rotor 521, the outer rotor 522 is an inner gear with the size larger than the outer diameter, the inner rotor 521 is meshed with gear teeth in the outer rotor 522, a crescent 524 is arranged between the outer rotor 522 and the inner rotor 521, the crescent 524 is fixedly connected with the fixed shell 523, two oil storage cavities are symmetrically arranged between two sides of the lower end of the outer rotor 522 and the fixed shell 523, the oil outlet pipeline of the heat dissipation ring 51 is respectively communicated with the corresponding oil storage cavity 525, when the rotating shaft 31 rotates, the inner rotor 521 and the outer rotor 522 are extruded into the oil outlet pipeline 526, and the oil output pipeline 526, and the oil circulation oil hole 52 is formed in the heat dissipation ring 52, and the oil output hole 52 can be extruded on the oil hole 52, and the oil circulation oil hole formed in the heat dissipation ring 51.

The motion process of the embodiment is as follows: when the motor works, the rotating shaft 31 rotates to drive the gear 43 and the inner rotor 521 to rotate, the gear 43 rotates to drive the four fans 41 to rotate, the four fans 41 rotate to enable the fan blades to rotate along with the rotation, the four fans 41 are matched with each other, so that air in an inner circulation motor cavity with a fixed direction formed in the air in the motor cavity can be cooled when passing through the heat dissipation ring 51, the inner rotor 521 rotates to drive the outer rotor 522 to rotate, the inner rotor 521 and the outer rotor 522 rotate, oil is squeezed into the oil outlet pipeline 526 under the blocking of the crescent-shaped plate 524, the oil can circulate inside the heat dissipation ring 51 under the pressure action, the matching of the oil in the heat dissipation ring 51 and the fans 41 can improve the heat dissipation efficiency, when the cooling assembly 5 leaks oil, the leakage-proof gasket can prevent the oil from entering the motor to affect the normal work of the motor due to the adsorption effect of the oil, and when the oil loss in the cooling assembly 5 is excessive, the oil can be delivered to the inside of the squeezing unit 52 through the oil delivery hole formed in the rear end face of the fixed shell 523, so as to supplement the oil.

The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention should not be limited thereby, and any modifications made on the basis of the technical solutions according to the technical idea proposed by the present invention are within the protection scope of the present invention.

Claims

1. The permanent magnet inner rotor direct-drive motor with the internal circulation for heat dissipation comprises a rotor (3), a motor shell (1), an outer stator (2) and a front cover (6), wherein the rotor (3) is sleeved inside the outer stator (2), the motor shell (1) wraps the outer stator (2), and the front end of the motor shell (1) is fixedly connected with the front cover (6); the method is characterized in that: the device also comprises an internal circulation assembly (4) and a cooling assembly (5); inner loop subassembly (4) set up the tail end in rotor (3), and pivot (31) of rotor (3) are passed inner loop subassembly (4) and are formed to rotate with inner loop subassembly (4) and are connected, and inner loop subassembly (4) are fixed with motor casing (1), and cooling module (5) set up the tail end in inner loop subassembly (4), cooling module (5) and motor casing (1) fixed connection, and cooling module (5) reduce the inside temperature of motor through inside fluid circulation.

2. The permanent magnet inner rotor direct drive motor with internal circulation heat dissipation of claim 1, wherein: the internal circulation assembly (4) comprises four fans (41), a fixed ring (42) and a gear (43); the inner circulation assembly (4) is fixed with the motor shell (1) through a fixing ring (42), a gear (43) is positioned in the middle of the inner circulation assembly (4) and connected with a rotating shaft (31) of the rotor (3), four fans (41) are arranged at the outer end of the gear (43) in a cross shape and meshed with the gear (43), and the fixing ring (42) for fixing is arranged at the outer end of the inner circulation assembly (4); the fixed ring (42) is rotationally connected with the four fans (41), and air circulation inside the motor is achieved through rotation and matching of the four fans (41).

3. The permanent magnet inner rotor direct drive motor with internal circulation heat dissipation of claim 2, wherein: and four fans (41) of the internal circulation assembly (4), wherein two adjacent fans (41) rotate oppositely relative to the other two fans (41), and the outer ends of the four fans (41) are provided with gear teeth matched with the gear (43) in a surrounding manner.

4. The permanent magnet inner rotor direct drive motor with internal circulation heat dissipation of claim 1, wherein: the cooling assembly (5) comprises a heat dissipation ring (52) and a pressing unit (52); the heat dissipation ring (52) is arranged at the tail end of the motor and connected with the extrusion unit (52), the two ends of the heat dissipation ring (51) penetrate into the extrusion unit (52) and are connected with the extrusion unit (52), the extrusion unit (52) is connected with the motor shell (1), and the extrusion unit (52) rotates through the rotating shaft (31) to achieve internal oil circulation.

5. The permanent magnet inner rotor direct drive motor with internal circulation heat dissipation of claims 1 and 4, characterized in that: the pressing unit (52) comprises an inner rotor (521), an outer rotor (522) and a fixed shell (523); the inner rotor (521) and the outer rotor (522) are meshed with each other, and the outer rotor (522) is arranged inside the fixed shell (523) and is in rotating connection with the rotating shaft (31).