CN209913632U

CN209913632U - High-power water-cooling switched reluctance motor of pure electric off-highway rigid dumper

Info

Publication number: CN209913632U
Application number: CN201921205911.2U
Authority: CN
Inventors: 邢广伟
Original assignee: Henan Cifu Heavy Industry Co Ltd
Current assignee: Henan Cifu Heavy Industry Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-01-07
Anticipated expiration: 2029-07-29

Abstract

A high-power water-cooled switched reluctance motor of a pure electric off-highway rigid dumper comprises a motor shell, a front end cover, a rear end cover, a front end bearing, a rear end bearing, a rotor and a stator, wherein the motor shell is of a double-layer structure, the inner space of the double-layer structure is a cooling water channel, and the cooling water channel is divided into a plurality of independent areas by a plurality of partition plates; the front end cover and the rear end cover are respectively positioned at two ends of the motor shell, bearing chambers are respectively arranged on the front end cover and the rear end cover, the front end bearing is positioned in the bearing chamber of the front end cover, the rear end bearing is positioned in the bearing chamber of the rear end cover, a stator lamination is pressed on the inner side of the motor shell, a stator is arranged on the stator lamination, a rotor shaft is arranged at the center of the rotor, the rotor is provided with a plurality of magnetic poles, a plurality of magnetic poles are also arranged on the stator, and the stator and the rotor are of a double salient pole structure; the utility model has the advantages of load characteristic is excellent, the low-speed performance is good, starting torque is big, starting current is little, save the electric energy.

Description

High-power water-cooling switched reluctance motor of pure electric off-highway rigid dumper

Technical Field

The utility model belongs to the mining truck field, concretely relates to high-power water-cooling switched reluctance motor of electricelectric moves non-highway rigidity tipper.

Background

The traction motor of the prior large-tonnage electric transmission mining automobile adopts a direct current or alternating current variable frequency motor, and along with the application of a switched reluctance motor, a speed regulating system has the advantages of a direct current speed regulating system and a variable frequency speed regulating system; the motor has more advantages in the aspects of motor structure, manufacturing cost, energy conservation, consumption reduction and the like, and with the continuous enhancement of global energy crisis and environmental awareness, the development of new energy becomes an important measure for improving the environment, saving energy and reducing consumption in the world at present; the mining automobile occupies the dominant position in the global mining transportation industry, the fuel consumption is large, and the severity of emission pollution is self-evident; therefore, the development and the use of the pure electric off-highway rigid dump truck become a necessary trend for the sustainable development of mining automobile production and mining enterprises; the traction motor serving as a main power unit of the pure electric off-highway rigid dumper becomes a main component of the pure electric off-highway rigid dumper, and the switched reluctance motor is gradually accepted by people and widely applied due to the advantages and characteristics of the switched reluctance motor. In view of energy consumption of drive units of pure electric mining vehicles and hybrid power mining vehicles which are off-line at present, some problems exist.

1. The electric mining automobile or the hybrid mining automobile with the fuel engine replaced by the electric motor still has some systems such as an air system, a PTO, a transmission mechanism, a final transmission and the like, and some system components consume meaningless with the operation of the engine, so that the consumption of electric energy or diesel oil is increased, the endurance mileage of the electric mining automobile is restricted, and the transportation cost of the mining automobile is increased.

2. The electric mining vehicles and the hybrid power mining vehicles of the types greatly influence the spatial layout of the vehicles and restrict the optimization of the whole vehicle system structure, thereby limiting the configuration capacity of the power battery.

3. From the aspect of vehicle maintenance and repair, the system components are compact, the maintenance and repair of the traditional mining automobile are not fundamentally changed, the workload of post personnel and the time for equipment maintenance are increased, and therefore the operation efficiency and the transportation cost of the mining automobile are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's is not enough, for improving the equipment level of pure electric off-highway rigidity tipper, optimization system overall arrangement and whole car structure really realize energy saving and emission reduction's purpose, and provide a load characteristic excellence, low-speed can be good and starting torque is big and the high-power water-cooling switched reluctance motor of pure electric off-highway rigidity tipper that starting current is little.

The purpose of the utility model is realized like this: a high-power water-cooled switched reluctance motor of a pure electric off-highway rigid dumper comprises a motor shell, a front end cover, a rear end cover, a front end bearing, a rear end bearing, a rotor and a stator, wherein the motor shell is of a double-layer structure, the inner space of the double-layer structure is a cooling water channel which is divided into a plurality of independent areas by a plurality of partition plates, the other partition plates except the partition plate between a water inlet and a water outlet are provided with water channels at the head and the tail, and independent water cavities are connected in series; the front end cover and the rear end cover are respectively positioned at two ends of the motor shell, bearing chambers are respectively arranged on the front end cover and the rear end cover, the front end bearing is positioned in the bearing chamber of the front end cover, and an adjusting gasket is arranged between the front bearing and the front bearing end cover; the rear end bearing is positioned in a bearing chamber of the rear end cover, and an adjusting gasket is arranged between the rear bearing and the rear bearing end cover; the motor comprises a motor shell, a stator and a rotor, wherein a stator lamination is arranged on the inner side of the motor shell, a stator is arranged on the stator lamination, a rotor shaft is arranged in the center of the rotor, the rotor is provided with a plurality of magnetic poles, the stator is also provided with a plurality of magnetic poles, and the stator and the rotor are of a double-salient-pole structure.

The motor shell is formed by rolling and welding steel plates, and the cooling water channels are alternately arranged at the head end and the tail end of each partition plate, so that the cooling water channels form a closed loop in the double-layer motor shell.

The rotor is connected with the rotor shaft through a spline, one end of the rotor shaft is provided with a position sensor, the other end of the rotor shaft is of a hollow structure, and the rotor shaft is provided with internal spline teeth.

And a lubricating oil pipe a is arranged on the front end cover, and a lubricating oil pipe b is arranged on the rear end cover.

An adjusting gasket b is arranged between the front end cover and the front end bearing, and an adjusting gasket a is arranged between the rear end cover and the rear end bearing.

And the mounting flange is arranged outside the front end cover and is connected with the speed reducer shell through the mounting flange.

And a plurality of power line inlet holes are formed in the rear end cover, and are led out together with the position sensor wire harness to enter the motor controller box.

The rear end cover is provided with a water inlet pipe quick connector and a water outlet pipe quick connector.

The utility model has the advantages that:

1. the utility model has simple structure, the stator and the rotor form a double salient pole structure motor, the system structure is simple, the manufacturing cost is low, and the tooth-shaped structural design increases the structural strength of the stator and the rotor; the stator only has concentrated windings, no copper loss, high efficiency and simple insulating structure, and can run at high speed due to the simple structural design of the rotor.

2. The starting torque is large, the starting current is low, and the characteristic can be extended to a low-speed operation area, so that the system is very suitable for the low-speed heavy-load starting or long-time low-speed operation working condition of the mining truck.

3. The water cooling structure is favorable for meeting the requirements of the mining automobile on the running environment, the installation in a closed space reduces the metal dust and dust pollution of the motor, and meanwhile, the water cooling system ensures the ideal working temperature of the motor.

4. The method is suitable for frequent start-stop and forward and reverse operation conditions, the characteristic is also suitable for the working characteristics of the mining automobile, and in addition, the characteristic description of 2 is added, the current impact of the motor in the starting process is small, and the heating condition of the motor and the controller is smaller than that of continuous rated operation.

5. The motor control system has more controllable parameters and better speed regulation performance. This means that the control is flexible and convenient, the motor can run in the best state, and various functional characteristic curves can be realized.

Drawings

Fig. 1 is an axial sectional view of the present invention.

Fig. 2 is a radial cross-sectional view of the present invention.

In the figure: 1-a rotor; 2-a stator; 3-a front end bearing; 4-front bearing end cover; 5-bolt a; 6-bolt c; 7-front end cover; 8-motor casing; 9-cooling water channel; 10-a waterway housing; 11-a water outlet; 12-a water inlet; 13-power line access hole; 14-rear end cap; 15-rear end bearing; 16-bolt e; 17-rear bearing end cap; 18-bolt b; 19-lubricating oil pipe b; 20-lubricating oil pipe a; 21-a position sensor; 22-a separator; 23-rotor lamination; 24-a stator lamination; 25-a rotor shaft; 26-spacer a; 27-a cover plate; 28-motor mounting holes; 29-installing a seam allowance at the outer side; 30-installing a seam allowance at the inner side; 31-adjusting shim b

The specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings.

Example (b): as shown in fig. 1 and 2, the motor casing 8 is of a double-layer structure, the inner space of the double-layer structure is a cooling water channel 9, the cooling water channel 9 is divided into a plurality of independent areas by a plurality of partition plates 22, wherein 11 partition plates 22 are designed with intercommunicating water channel holes, and the partition plates 22 between the water inlet 12 and the water outlet 11 are completely closed, so as to ensure that cooling water is completely cooled around the circumferential direction of the motor casing 8; when the temperature detected by an external temperature control switch exceeds or is lower than a limit value, a working signal for starting or stopping the cooling system is sent to the vehicle controller, so that the motor is heated or cooled; the water inlet 12 and the water outlet 11 of the cooling water channel 9 are provided with quick connectors, and the motor cooling liquid is circularly cooled through an external cooling system.

Stator laminations 24 are pressed on the inner side of the motor shell 8, and stator 2 windings are distributed on the stator laminations 24; the rotor 1 is arranged on a rotor shaft 25; a front end cover 7 and a rear end cover 14 are respectively arranged at two ends of the motor casing 8 and are respectively fastened to the motor casing 8 through bolts c6 and e16, and the stator 2, the winding, the rotor 1 and the rotor shaft 25 are enclosed in a space formed by the front end cover 7 and the rear end cover 14; the front end cover 7 and the front bearing end cover 4 form a front bearing chamber through a bolt a5, an adjusting gasket 31b is arranged between the front end cover 7 and the front end bearing 3, an adjusting gasket a is arranged between the rear end cover and the rear end bearing, and a lubricating oil pipe a20 is arranged on the front bearing end cover 4; the rear end cover 14 and the rear bearing end cover 17 form a rear bearing chamber through a bolt b18, and a lubricating oil pipe b19 is arranged on the rear bearing end cover 17; an adjusting gasket 26a is arranged between the rear end cover 14 and the rear end bearing 15; a plurality of power line inlet holes 13 are formed in the rear end cover; a position sensor 21 is arranged at the rear end of the rotor shaft 25; the front end of the rotor shaft 25 is of a hollow internal spline structure, and the input shaft end of the speed reducer is of a spline structure and is connected with an internal spline of the rotor shaft 25; the stator winding is a four-phase concentrated winding, the stator and the rotor are of a double-salient-pole structure, a plurality of magnetic poles are uniformly distributed on the stator, and a plurality of magnetic poles are uniformly distributed on the rotor; an installation flange is arranged outside the front end cover 7 and is connected with the shell of the speed reducer through the installation flange, and a plurality of motor installation holes 28 are uniformly distributed on the installation flange; the front end cover 7 is provided with an inner side mounting spigot 30 and an outer side mounting spigot 29 so as to ensure the coaxiality and the positioning requirements of the motor and the axle housing, the axle housing and the axle tube.

A high-power water-cooled switched reluctance motor of a pure electric off-highway rigid dumper has the operation principle that the principle follows the principle of minimum magnetic resistance, magnetic flux is closed along a path with the minimum magnetic resistance, and when an iron core of a rotor 1 moves to the position with the minimum magnetic resistance, a main axis is superposed with the axis of a magnetic field; when a certain magnetic pole of the stator 2 is excited, a certain position overlapped with the axis of the stator 2 rotates, and the inductance of a certain phase of excitation winding is maximized; if the relative position of the rotor 1 is taken as the initial position, the power is supplied to a certain phase winding in sequence, and the rotor continuously rotates in the anticlockwise direction against the excitation sequence; on the contrary, if a certain phase winding is electrified in sequence, the motor can rotate along the clockwise direction; the steering of the high-power water-cooling switched reluctance motor is irrelevant to the current direction of the phase winding and only depends on the electrifying sequence of the phase winding; in addition, when the main switch device is switched on, a certain phase winding absorbs electric energy from the battery pack, and when the main switch is switched off, the winding current continuously circulates through the freewheeling diode and is fed back to the direct-current power supply; therefore, the high-power water-cooled switched reluctance motor has an electric energy recovery function, and the pure electric off-highway rigid dump truck can start the electric energy recovery system when running on a downhill road section and recharge the recovered electric energy into a battery pack or a super capacitor starting power supply, so that the battery pack has longer endurance mileage and high system efficiency; generally, the utility model has the advantages of load characteristic is excellent, the low-speed performance is good, starting torque is big, starting current is little, save the electric energy.

Claims

1. The utility model provides a high-power water-cooling switched reluctance motor of electricelectric moves non-highway rigidity tipper, includes motor casing, front end housing, rear end housing, front end bearing, rear end bearing, rotor and stator, its characterized in that: the motor shell is of a double-layer structure, the inner space of the double-layer structure is a cooling water channel, the cooling water channel is divided into a plurality of independent areas by a plurality of clapboards, and water channels are arranged at the head and the tail of the clapboards except the clapboard between the water inlet and the water outlet to connect the independent water cavities in series; the motor comprises a motor shell, a front end cover, a rear end cover, a front end bearing, a rear end bearing, a stator lamination, a rotor shaft, a plurality of magnetic poles, a stator and a rotor, wherein the front end cover and the rear end cover are respectively arranged at two ends of the motor shell, the front end cover and the rear end cover are respectively provided with a bearing chamber, the front end bearing is arranged in the bearing chamber of the front end cover, the rear end bearing is arranged in the bearing chamber of the rear end cover, the inner side of the motor shell is provided with the stator lamination in a pressing mode, the stator lamination is provided.

2. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: the motor shell is formed by rolling and welding steel plates, and the cooling water channels are alternately arranged at the head end and the tail end of each partition plate, so that the cooling water channels form a closed loop in the double-layer motor shell.

3. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: the rotor is connected with the rotor shaft through a spline, one end of the rotor shaft is provided with a position sensor, the other end of the rotor shaft is of a hollow structure, and the rotor shaft is provided with internal spline teeth.

4. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: and a lubricating oil pipe a is arranged on the front end cover, and a lubricating oil pipe b is arranged on the rear end cover.

5. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: an adjusting gasket b is arranged between the front end cover and the front end bearing, and an adjusting gasket a is arranged between the rear end cover and the rear end bearing.

6. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: and the mounting flange is arranged outside the front end cover and is connected with the speed reducer shell through the mounting flange.

7. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: and a plurality of power line inlet holes are formed in the rear end cover, and are led out together with the position sensor wire harness to enter the motor controller box.

8. The high-power water-cooled switched reluctance motor of the pure electric off-highway rigid dumper according to claim 1, characterized in that: the rear end cover is provided with a water inlet pipe quick connector and a water outlet pipe quick connector.