CN114825831A

CN114825831A - Mining integrated self-adaptive independent electric drive unit

Info

Publication number: CN114825831A
Application number: CN202210595635.5A
Authority: CN
Inventors: 任志勇; 梁玉芳; 王步康; 李文军; 王治伟; 赵远; 潘成杰; 杨希; 黄振华; 孔令志; 郝志军; 王素慧; 韦建龙; 杨志龙; 张凡
Original assignee: Taiyuan Institute of China Coal Technology and Engineering Group; Shanxi Tiandi Coal Mining Machinery Co Ltd
Current assignee: Taiyuan Institute of China Coal Technology and Engineering Group; Shanxi Tiandi Coal Mining Machinery Co Ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2022-07-29

Abstract

The invention discloses a mining integrated self-adaptive independent electric drive unit, which comprises wheels and permanent magnet synchronous motors arranged in the wheels, wherein each permanent magnet synchronous motor comprises a stator assembly, a rotor and a power supply assembly; the rotor and power supply assembly comprises a rotor core and magnetic steel which are fixedly connected with a motor shell respectively, an explosion-proof cavity is arranged in the rotor core, a plurality of explosion-proof batteries are arranged in the explosion-proof cavity, and the motor shell is fixedly connected with a rim of a wheel; the stator core is fixedly provided with a controller and a power supply management unit, a plurality of explosion-proof batteries are connected in series and then electrically connected with the power supply management unit, the armature winding and the power supply management unit are respectively electrically connected with the controller, and the controller is in wireless communication connection with the whole vehicle control unit. The mining power performance of the invention is good, and the energy consumption is reduced.

Description

Mining integrated self-adaptive independent electric drive unit

Technical Field

The invention relates to the technical field of electric drive units, in particular to an integrated self-adaptive independent electric drive unit for a mine.

Background

At present, the objective requirements of reducing personnel and improving efficiency, improving coal mine safety and reducing accident rate exist in coal mines, and energy conservation and emission reduction are urgently needed to be realized. The rubber-tyred vehicle of explosion-proof battery has alleviated the diesel engine vehicle in the pit in a coal mine "four high one low" scheduling problem to a certain extent, because explosion-proof transformation back diesel engine structure and parameter are difficult to reach reasonable configuration, and the ventilation condition is relatively poor in the pit in addition, and the speed of a motor vehicle is lower by the limit of road conditions, compares with the ground vehicle of equal fortune ability and has obvious "four high one low": the tail gas emission is high, the noise is high, the failure rate is high, the operating cost is high, and the efficiency is low; however, in the prior art, due to the complex underground coal mine working conditions, the storage battery vehicle presents pain points with poor working condition adaptability, and the power and torque output of a driving system is very limited in the traditional centralized driving mode under the long-distance large-gradient low-speed large-torque working condition, so that the explosion-proof motor and the controller are easy to overload frequently, the heat productivity is large, the shutdown protection is performed frequently, and the power performance of the whole vehicle is poor. The power transmission route of the centralized drive is as follows: accumulator → electric control box → motor → reducer → wheel, longer driving chain will reduce the system efficiency, also aggravate the noise pollution.

Disclosure of Invention

The invention aims to provide a mining integrated self-adaptive independent electric drive unit, which is used for solving the problems in the prior art, improving the power performance and reducing the energy consumption.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a mining integrated self-adaptive independent electric drive unit, which comprises wheels and a permanent magnet synchronous motor arranged in the wheels, wherein the permanent magnet synchronous motor comprises a stator assembly, a rotor and a power supply assembly, the stator assembly comprises a stator core, an armature winding and a stator support, the stator support is fixedly arranged on a wheel axle of the wheels, the wheel axle is fixedly connected with a vehicle body, the stator core is fixedly arranged on the stator support, and the armature winding is arranged on the stator core; the rotor and power supply assembly comprises a rotor core and magnetic steel which are fixedly connected with a motor shell respectively, an explosion-proof cavity is arranged in the rotor core, a plurality of explosion-proof batteries are arranged in the explosion-proof cavity, the explosion-proof batteries are fixedly connected with the stator support, and the motor shell is fixedly connected with a rim of the wheel; the stator core is fixedly provided with a controller and a power management unit, the explosion-proof batteries are connected in series and then electrically connected with the power management unit, the armature winding and the power management unit are respectively electrically connected with the controller, and the controller is in wireless communication connection with the whole vehicle control unit.

Preferably, the brake further comprises a brake, the brake comprises a brake pad, a pressure plate, an intermediate shell and an end cover, the brake block comprises a friction plate and a mating part, the middle shell is positioned between the two end covers, the two end covers are respectively connected with the middle shell in a sealing way, the two end covers are respectively connected with the wheel shaft in a rotating way through bearings, the movable shell is sleeved on the wheel shaft in a sliding way, the friction plate is fixedly arranged on the movable shell, the mating part is fixedly connected with the middle shell, the movable shell is also fixedly sleeved with a pressure plate, the pressure plate is fixedly provided with a first piston and a second piston, a first oil chamber is formed between the first piston and the intermediate housing, a second oil chamber is formed between the second piston and the intermediate housing, and the first oil chamber and the second oil chamber are both located between the first piston and the second piston; the end cover is fixedly provided with an explosion-proof electromagnet, the explosion-proof electromagnet can drive the first piston to be close to the explosion-proof electromagnet, the explosion-proof electromagnet can also drive the second piston to be far away from the explosion-proof electromagnet, and one end cover is fixedly connected with the motor shell.

Preferably, the pressure disk has linked firmly an inserted bar, the inserted bar is kept away from the one end of pressure disk is inserted in the cavity of end cover, be provided with the cover in the spring chamber and establish the spring on the inserted bar, spring one end with the inner wall butt in spring chamber, the other end with the inserted bar butt.

Preferably, the motor further comprises a rotary transformer, a rotary transformer stator of the rotary transformer is fixedly connected with the wheel shaft, a rotor of the rotary edge pressure device is fixedly connected with a rotor support, the rotor support is fixedly connected with the motor shell, and the rotor support is in running fit with the wheel shaft through a bearing.

Preferably, the motor further comprises a water-cooling casing located between the motor casing and the rotor core, and the water-cooling casing is fixedly connected with the motor casing.

Preferably, the stator core is further fixedly provided with a wireless communication module, and the controller is in wireless communication connection with the whole vehicle control unit through the wireless communication module.

Preferably, a tire is arranged on the wheel, and the tire is a rubber air tire; the stator core is provided with a chute, and the armature winding is arranged in the chute.

Compared with the prior art, the invention has the following technical effects:

the mining integrated self-adaptive independent electric drive unit has good power performance and reduces energy consumption. The mining integrated self-adaptive independent electric drive unit improves the transmission efficiency and reduces the noise pollution by shortening the power transmission chain.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an integrated self-adaptive independent electric drive unit for a mine according to the present invention;

FIG. 2 is a schematic structural diagram of a rotor and power supply assembly of the mining integrated self-adaptive independent electric drive unit according to the present invention;

FIG. 3 is a schematic structural diagram of a brake in the mining integrated self-adaptive independent electric drive unit according to the invention;

wherein: 1. a wheel axle; 2. a rim; 3. a stator support; 4. a first O-ring; 5. a first deep groove ball bearing; 6. a socket head cap screw; 7. a gasket; 8. pressing a ring; 9. a screw; 10. a second O-ring; 11. a motor housing; 12. a water-cooled housing; 13. an explosion-proof battery; 14. magnetic steel; 15. a rotor; 16. a stator core; 17. an explosion-proof cavity; 18. the rotor and the power supply assembly; 19. a magnetic barrier material; 20. a wheel cover; 21. a rear bearing cap; 22. a rotary transformer; 23. a flat bond; 24. a circlip; 25. a second deep groove ball bearing; 26. a rotor support; 27. an armature winding; 28. a wireless communication module; 29. a brake; 30. a permanent magnet synchronous motor; 31. a rotor core; 32. a power management unit; 33. a controller; 34. a rubber air tire; 291. moving the shell; 292. a middle housing; 293. a second piston; 294. an end cap; 295. a second oil chamber; 296. a platen; 297. an explosion-proof electromagnet; 298. a first oil chamber; 299. a friction plate; 2910. a mating member; 2911. a first piston.

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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 3: the embodiment provides a mining integrated self-adaptive independent electric drive unit, which comprises wheels and permanent magnet synchronous motors 30 arranged in the wheels.

The wheel includes shaft 1, rim 2, wheel cap 20 and sets up the rubber air child 34 on rim 2, and wheel cap 20 passes through the bolt and can dismantle with rim 2 and be connected, sets up detachable wheel cap 20 and can easy to assemble and dismantle PMSM 30.

The permanent magnet synchronous machine 30 includes a stator assembly and a rotor and power assembly 18.

The stator assembly comprises a stator iron core 16, an armature winding 27 and a stator support 3, the stator support 3 is fixedly arranged on a wheel shaft 1 of the wheel, the wheel shaft 1 is fixedly connected with a vehicle body, the stator iron core 16 is fixedly arranged on the stator support 3, and the armature winding 27 is arranged on the stator iron core 16; specifically, the stator core 16 is provided with oblique slots, and the armature windings 27 are disposed in the oblique slots. The rotary transformer 22 has its rotary stator connected to the axle 1 via flat key 23, and the axle 1 has elastic retainer ring 24 and step for limiting the axial position of the rotary transformer 22. A rotary transformer rotor of the rotary transformer 22 is fixedly connected with a rotor bracket 26, the rotor bracket 26 is fixedly connected with a motor shell, and the rotor bracket 26 is rotationally matched with a wheel shaft through a bearing; the resolver 22 is a brushless reluctance type resolver, and is composed of a resolver stator, a resolver rotor, and a decoding chip, and the resolver rotor is separated from the resolver stator without contact. The magnetic flux distribution in the air gap between the rotary transformer stator and the rotary rotor is in a positive (cosine) law, when excitation voltage is applied to one winding of the rotary transformer stator, the rotary transformer rotor generates voltage through electromagnetic coupling, and the output voltage of the rotary transformer rotor depends on the relative position of the axes of the two windings of the rotary transformer stator and the rotary transformer rotor in space. The value of the two is maximum when the two are parallel, the value of the two is zero when the two are perpendicular, and the voltage value changes along with the deflection angle of the rotor in a positive (residual) chord manner; a special conversion chip is arranged in the rotary transformer 22 for decoding, an analog signal output by the rotary transformer is converted into a digital signal, a rotary transformer rotor is connected with an output part of the motor for detecting the rotating speed of the motor, and when the motor participates in transmission and needs to feed back real-time speed, the speed feedback function is completed.

The wheel rim 2 is rotatably connected with the wheel shaft 1 through the first deep groove ball bearing 5, the rotor support 26 is rotatably connected with the wheel shaft 1 through the second deep groove ball bearing 25, and the rotor support 26 is further connected with the rear bearing cover 21.

The rotor and power supply assembly 18 comprises a rotor iron core 31 and magnetic steel 14 which are fixedly connected with the motor shell 11 respectively, an explosion-proof cavity 17 is arranged in the rotor iron core 31, a plurality of explosion-proof batteries 13 are arranged in the explosion-proof cavity 17, the explosion-proof batteries 13 are fixedly connected with the stator support 3, a gap is formed between the explosion-proof batteries 13 and the inner wall of the explosion-proof cavity 17, namely the explosion-proof batteries 13 and the explosion-proof cavity 17 are not in contact, and a magnetism isolating material 19 is laid on the inner wall of the explosion-proof cavity 17 to prevent the magnetism of the rotor 15 from influencing the explosion-proof batteries 13; the motor shell 11 of the permanent magnet synchronous motor 30 is fixedly connected with the rim 2 through the socket head cap screws 6 and the gaskets 7. The rotor and power supply assembly 18 further comprises a water cooling machine shell 12 located between the motor machine shell and the rotor iron core 31, the water cooling machine shell 12 is connected with the motor machine shell through a pressing ring 8, a first O-shaped ring 4, a second O-shaped ring 10 and a screw 9, the first O-shaped ring 4 and the second O-shaped ring 10 are respectively clamped between the pressing ring 8 and the motor machine shell 11, and only the side walls of the first O-shaped ring 4 and the second O-shaped ring 10, which are in contact with the pressing ring 8, are different.

The stator core 16 is fixedly provided with a controller 33 and a power management unit 32, the explosion-proof batteries 13 are connected in series and then electrically connected with the power management unit 32, the armature winding 27 and the power management unit 32 are respectively electrically connected with the controller 33, the stator core 16 is also fixedly provided with a wireless communication module 28, and the controller 33 is in wireless communication connection with the whole vehicle control unit through the wireless communication module 28.

The mining integrated self-adaptive independent electric drive unit further comprises a brake 29, the brake 29 comprises a brake sheet, a pressure plate 296, an intermediate housing 292 and end covers 294, the brake sheet comprises friction plates 299 and a mating member 2910, the intermediate housing 292 is positioned between the two end covers 294, and the two end covers 294 are respectively connected with the middle shell 292 in a sealing way, the two end covers 294 are respectively connected with the wheel axle 1 through bearings in a rotating way, the movable shell 291 is sleeved on the wheel axle 1 in a sliding way, the friction plate 299 is fixedly arranged on the movable shell 291, the coupling 2910 is fixedly connected to the middle housing 292, the movable housing 291 is further fixedly sleeved with a pressure plate 296, the pressure plate 296 is fixedly provided with a first piston 2911 and a second piston 293, a first oil chamber 298 is formed between the first piston 2911 and the middle housing 292, a second oil chamber 295 is formed between the second piston 293 and the middle housing 292, and first and second oil chambers 298, 295 are both located between first and second pistons 2911, 293; an explosion-proof electromagnet 297 is fixedly arranged on the end cover 294, the explosion-proof electromagnet 297 can drive the first piston 2911 to be close to the explosion-proof electromagnet 297, the explosion-proof electromagnet 297 can also drive the second piston 293 to be far away from the explosion-proof electromagnet 297, and one end cover 294 is fixedly connected with the motor shell 11.

The pressure plate 296 is fixedly connected with an inserted link, one end of the inserted link, which is far away from the pressure plate 296, is inserted into the cavity of the end cover 294, a spring which is sleeved on the inserted link is arranged in the spring cavity, one end of the spring is abutted against the inner wall of the spring cavity, and the other end of the spring is abutted against the inserted link.

The brake 29 adopts a closed oil cooling wet type brake, brake pads (the coupling 2910 and the friction plate 299) are immersed in circulating oil, the heat of the brake 29 is cooled through the oil, and the brake is long in service life and free of maintenance. Two groups of pistons are arranged in the brake 29, wherein one group of small pistons realize parking braking and emergency braking of the vehicle by adopting electric braking and hydraulic releasing working modes, the friction plate 299 and the movable shell 291 are connected with the wheel shaft 1 through splines to rotate together, the coupling piece 2910 is connected with the middle shell 292 through the splines, and the middle shell 292 is fixed with the end covers 294 on two sides through bolts. The small piston moves rightwards under the action of the explosion-proof electromagnet 297 to press the brake pad to generate braking torque, when the brake is released, pressure oil enters the second oil cavity 295 through the foot-operated brake valve to push the small piston to move leftwards, so that the brake 29 is released; the other group of large pistons realize vehicle service braking and torque control by adopting a hydraulic braking and electric releasing working mode, pressure oil enters a first oil cavity 298 through a pedal brake valve, the large pistons move rightwards under the action of the pressure oil to press a brake pad to generate braking torque, when braking is relieved, the pedal brake valve acts to cut off the pressure oil, and the large pistons move leftwards under the action of an anti-explosion electromagnet 297 to return, so that a brake 29 is released. The two sets of functions of the wet brake 29 share one set of the explosion-proof electromagnet 297 and the brake pad (the coupling 2910 and the friction plate 299), and the brake pad is engaged in the oil cavity. An electro-hydraulic brake 29 is mounted at one side in the motor shell 11 in a closed mode, the rotating speed of the electro-hydraulic brake is consistent with that of the outer rotor 15 of the motor, and the brake 29 is connected with the wheel shaft 1.

In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. Independent electric drive unit of mining integral type self-adaptation, its characterized in that: the permanent magnet synchronous motor comprises a wheel and a permanent magnet synchronous motor arranged in the wheel, wherein the permanent magnet synchronous motor comprises a stator assembly, a rotor and a power supply assembly, the stator assembly comprises a stator core, an armature winding and a stator bracket, the stator bracket is fixedly arranged on a wheel shaft of the wheel, the wheel shaft is fixedly connected with a vehicle body, the stator core is fixedly arranged on the stator bracket, and the armature winding is arranged on the stator core; the rotor and power supply assembly comprises a rotor core and magnetic steel which are fixedly connected with a motor shell respectively, an explosion-proof cavity is arranged in the rotor core, a plurality of explosion-proof batteries are arranged in the explosion-proof cavity, the explosion-proof batteries are fixedly connected with the stator support, and the motor shell is fixedly connected with a rim of the wheel; the stator core is fixedly provided with a controller and a power management unit, the explosion-proof batteries are connected in series and then electrically connected with the power management unit, the armature winding and the power management unit are respectively electrically connected with the controller, and the controller is in wireless communication connection with the whole vehicle control unit.

2. The mining integrated adaptive self-contained electric drive unit of claim 1, characterized in that: the brake comprises a brake pad, a pressure plate, an intermediate shell and end covers, wherein the brake pad comprises a friction plate and a coupling piece, the intermediate shell is positioned between the two end covers, the two end covers are respectively connected with the intermediate shell in a sealing manner, the two end covers are respectively connected with the wheel shaft in a rotating manner through bearings, a movable shell is sleeved on the wheel shaft in a sliding manner, the friction plate is fixedly arranged on the movable shell, the coupling piece is fixedly connected with the intermediate shell, the movable shell is also fixedly sleeved with the pressure plate, the pressure plate is fixedly provided with a first piston and a second piston, a first oil cavity is formed between the first piston and the intermediate shell, a second oil cavity is formed between the second piston and the intermediate shell, and the first oil cavity and the second oil cavity are both positioned between the first piston and the second piston; the end cover is fixedly provided with an explosion-proof electromagnet, the explosion-proof electromagnet can drive the first piston to be close to the explosion-proof electromagnet, the explosion-proof electromagnet can also drive the second piston to be far away from the explosion-proof electromagnet, and one end cover is fixedly connected with the motor shell.

3. The mining integrated adaptive self-contained electric drive unit of claim 2, characterized in that: the pressure disk has linked firmly an inserted bar, the inserted bar is kept away from the one end of pressure disk is inserted in the cavity of end cover, be provided with the cover in the spring chamber and establish spring on the inserted bar, spring one end with the inner wall butt in spring chamber, the other end with the inserted bar butt.

4. The mining integrated adaptive self-contained electric drive unit of claim 1, characterized in that: the rotary transformer is characterized by further comprising a rotary transformer, wherein a rotary transformer stator of the rotary transformer is fixedly connected with the wheel shaft, a rotor of the rotary edge transformer is fixedly connected with a rotor support, the rotor support is fixedly connected with the motor shell, and the rotor support is in running fit with the wheel shaft through a bearing.

5. The mining integrated adaptive self-contained electric drive unit of claim 1, characterized in that: the motor is characterized by further comprising a water-cooling shell positioned between the motor shell and the rotor core, and the water-cooling shell is fixedly connected with the motor shell.

6. The mining integrated adaptive self-contained electric drive unit of claim 1, characterized in that: the stator core is further fixedly provided with a wireless communication module, and the controller is in wireless communication connection with the whole vehicle control unit through the wireless communication module.

7. The mining integrated adaptive self-contained electric drive unit of claim 1, characterized in that: the wheel is provided with a tire which is a rubber air tire; the stator core is provided with a chute, and the armature winding is arranged in the chute.