CN1704277A - Linear motor active suspension arrangement of rail vehicle - Google Patents

Abstract

The invention discloses a rail vehicle linear motor active suspension device, the linear motor (4) of which is suspended on the lower part of the car body (1) through a servo actuator (8). This kind of device can make the air gap between the linear motor and the ground plate small, stable and reliable, and the motor efficiency is high; the dynamic load between the bogie and the wheel rail is low, the wear is small, and the shock absorption performance of the vehicle is good; and the installation requirements are low. , Low installation cost.

Description

A rail vehicle linear motor active suspension device

Technical field

The invention relates to a suspension device for a rail vehicle linear motor.

Background technique

The operation of electric rail vehicles depends on the drive of the motor. The traditional rotating motor is mainly composed of a stator and a rotor. When the rotor drives the wheels forward, a complex mechanical transmission system is required. A new type of rail vehicle driving method uses a linear motor, which expands the stator of the motor into a plane (straight line) and hangs it at the bottom of the vehicle, and its rotor is a pole plate (also called an induction motor) laid between two rails on the ground. rail). Since all other parts of the linear motor except the rotor (ground plate) are installed on the motor stator, the stator of the linear motor is often directly referred to as a linear motor. The linear motor mentioned below in this patent specification usually also refers to the linear motor stator. After electrification, a magnetic force is generated between the linear motor and the ground plate (rotor) to push the rail vehicle to run. The gap between the linear motor and the ground plate, that is, the size and stability of the air gap, is directly related to the traction efficiency and running stability of rail vehicles such as trains. The existing linear motor driving device adopts a passive direct suspension method, which is usually suspended on the bogie frame or the axle of the vehicle. For example, Chinese Patent No. CN85108129A proposes to suspend the linear motor on the axle of the train.

There are four deficiencies in the prior art: one is that due to the influence of a series of suspensions such as the bogie frame and the wheel pair, the interaction between the wheel and the rail, and the relative position error between the ground plate and the rail, the air gap size There will be large changes with the operation of the vehicle, resulting in unstable magnetic force driving the vehicle. Second, in the case of a large change in the size of the air gap, in order to ensure the safety of the high-speed running vehicle and avoid the collision between the linear motor and the ground plate, the air gap must be set quite large, usually set to 10-12mm, and usually The air gap between the stator and rotor of the current motor is only 2-3mm, and the obvious increase of the air gap will lead to a serious weakening of the magnetic field and greatly reduce the efficiency of the motor. Third, in order to ensure that the air gap between the linear motor and the ground plate is relatively small and stable, the height difference between the plate and the rail must be strictly controlled, which requires extremely strict installation techniques for the linear motor and the ground plate, and the work is difficult and costs will increase significantly. Fourth, the linear motor has a large mass and is directly suspended on the wheel shaft, which will greatly increase the inter-sprung weight or unsprung weight of the vehicle, resulting in a significant increase in the dynamic load between the bogie and the wheel-rail, reducing the shock absorption performance of the vehicle. Increase the wear and tear of bogies and wheel rails.

Contents of the invention

The object of the present invention is to provide a linear motor active suspension device for rail vehicles, which can make the air gap between the linear motor and the ground plate small and stable and reliable, and the motor efficiency is high; the dynamic load between the bogie and the wheel rail Low wear, small wear, good shock absorption performance of the vehicle; and low installation requirements and low installation costs.

The present invention solves its technical problems, and the adopted technical scheme is: a linear motor active suspension device for a rail vehicle, comprising a car body, a linear motor suspended under the car body, and a ground pole plate laid between two tracks on the ground, and its structural characteristics are as follows: : The linear motor is suspended on the lower part of the car body through the servo actuator.

Compared with the prior art, the beneficial effect of the present invention is: since the linear motor is suspended on the lower part of the car body through the servo actuator, and the telescopic rod of the servo actuator can be controlled by a manual or automatic control device to expand and contract precisely, thereby When the vehicle is running, according to the distance between the linear motor and the ground plate, that is, the change of the air gap, the servo actuator can be used to drive the linear motor to move up and down at any time to adjust the size of the air gap to ensure that the air gap is small and stable. fixed value, high motor efficiency; since the size of the air gap can be easily adjusted, there is no need to strictly control the height difference between the ground plate and the rail, so the installation process requirements of the linear motor and the ground plate are low, easy to install, and low cost. Low. And because the linear motor is suspended on the lower part of the car body on the sprung rather than on the sprung or unsprung parts such as the axle, the sprung or unsprung weight of the vehicle is greatly reduced, the vehicle has good shock absorption, and the bogie is reduced The dynamic load between the wheel and the rail reduces its wear and tear.

The above-mentioned servo actuator is electrically connected with the suspension controller through a control cable. In this way, the suspension controller controls and drives the servo actuator to move, and drives the linear motor to move up and down, so as to realize the control of the air gap between the linear motor and the ground plate, and the control is more accurate and reliable.

The body of the above-mentioned linear motor is equipped with a non-contact displacement sensor for measuring the gap between the linear motor and the ground plate, and the sensor is also electrically connected with the suspension controller through a cable. In this way, the change of the air gap is sensed and transmitted to the suspension controller in real time and accurately through the displacement sensor, and the suspension controller can control the action of the servo actuator more accurately and without lag in time, so that the air gap value can be more constant, Reliable control, and automate the whole process of air gap control.

The above-mentioned linear motor is provided with a limit mechanism that limits the maximum position of the linear motor's upward and downward movement.

The above-mentioned limiting mechanism is composed of a limiting column fixed on the upper part of the linear motor, and a limiting hole on the upper part of the limiting column fits on the axle of the wheel set of the car body bogie.

Since the hole diameter of the limit hole is larger than the diameter of the axle according to the set value, the limit post and its linear motor can and can only move up and down within the range limited by the limit hole, thereby ensuring that the linear motor actively (servo) After a failure, the limit position of the linear motor's up and down movement is mechanically limited, and the vehicle can still continue to run at a low speed, and can be repaired at a station with maintenance capabilities; to prevent the vehicle from being paralyzed on the road and difficult to maintain Difficulties.

The number of the above servo actuators can be one, two, three or four.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural frame diagram of an embodiment of the present invention.

Fig. 2 is a longitudinal structural frame diagram of the embodiment of the present invention.

Fig. 3 is an electrical principle block diagram of an embodiment of the present invention.

Detailed ways

Figures 1-3 show that a specific embodiment of the present invention is: a rail vehicle linear motor active suspension device, comprising a car body 1, a linear motor 4 suspended under the car body 1, and a ground pole laid between two tracks on the ground. Plate 5, its linear motor 4 is suspended on the lower part of car body 1 through servo actuator 8. The servo actuator 8 can be driven by hydraulic pressure, compressed air, or electromechanical actuator.

The servo actuator 8 is electrically connected with the suspension controller 7 via a control cable. A non-contact displacement sensor 9 for measuring the gap between the linear motor 4 and the ground plate 5 is installed on the body of the linear motor 4 , and the sensor 9 is electrically connected with the suspension controller 7 through a cable.

The linear motor 4 is provided with a limit mechanism that limits the maximum position of the linear motor 4 moving up and down. The limit mechanism consists of a limit post 10 fixed on the top of the linear motor 4 , and a limit hole 10 a on the top of the limit post 10 fits on the axle 12 of the bogie wheel set 3 of the vehicle body 1 . And in order to make the limit more reliable, a corresponding touch switch or contact sensor electrically connected with the suspension controller 7 is set at the uppermost or lower end of the limit hole 10a; position, the touch switch or contact sensor generates a limit position signal and sends it to the suspension controller 7, and the suspension controller 7 controls the servo actuator 8 to stop acting accordingly, so as to avoid damage to the servo actuator 8.

Figures 1-3 show that the number of servo actuators 8 in this example is four, because the linear motor 4 is a rigid body, therefore, the four servo actuators 8 must be controlled and coordinated by the suspension controller 7 . During implementation, the quantity of the servo actuator 8 may also be one, two, three or more. When one servo actuator is used, the linear motor connected to the lower end of the servo actuator can only move up and down with the expansion and contraction of its telescopic rod; if two servo actuators are used, they can move forward and backward along the longitudinal direction of the car body. The air gap at the front and rear ends of the linear motor connected to the lower end of the servo actuator can be adjusted separately; if three or four servo actuators are used, they can be arranged in a triangle or rectangle along the longitudinal direction of the car body, and the front and rear ends of the linear motor can be adjusted separately. The air gap at the end as well as the gap on the lateral sides can be adjusted individually.

Fig. 1, Fig. 2 also show that the linear motor 4 of the present embodiment is suspended on the lower part of the car body through the servo actuator 8 in a specific way: the lower part of the linear motor 4 body is provided with a fixed hinge 13, and the servo actuator The telescopic rod end of 8 is hinged with the fixed support hinge 13 on the linear motor 4 body. The upper end of the body of the servo actuator 8 is a hinged hole, which is hinged with the fixed hinge support 14 at the bottom of the car body 1 , and the linear motor 4 is suspended on the lower part of the car body 1 by the servo actuator 8 . Of course, the suspension method can also adopt various other existing suspension methods, as long as it can ensure that the linear motor 4 can be reliably suspended on the lower part of the vehicle body 1 .

In addition, the traction drive mode between the linear motor 4 and the vehicle body 1 of the present invention can adopt various existing traction modes, and can also be traction-connected according to the manners shown in Fig. 1 and Fig. The body 1 is rigidly and fixedly connected to an integrated traction column 11. There are two hinge supports 15 on the traction column 11. There is a hinge point 16 on both sides of the linear motor 4 body, symmetrically arranged, and hinged with one end of the traction rod 6. The traction rod The other end of 6 is horizontally hinged to the hinge support 15 of the traction column 11 of the vehicle body 1, so as to longitudinally position the linear motor 4 and transmit the traction force to the vehicle body 1.

The suspension controller 7 of the present invention can be controlled automatically and can also be started and operated manually.

Claims (6)

1. A rail vehicle linear motor active suspension device, comprising a car body (1), a linear motor (4) suspended under the car body (1), and a ground pole plate (5) laid between two tracks on the ground, characterized in that: The linear motor (4) is suspended on the lower part of the vehicle body (1) via a servo actuator (8). 2. The linear motor active suspension device for rail vehicle according to claim 1, characterized in that: the servo actuator (8) is electrically connected to the suspension controller (7) via a control cable. 3. An active suspension device for a linear motor of a rail vehicle according to claim 1, characterized in that: the body of the linear motor (4) is equipped with a device for measuring the gap between the linear motor (4) and the ground plate (5) The non-contact displacement sensor (9) of this sensor (9) is also electrically connected with the suspension controller (7) through cables. 4. The linear motor active suspension device for rail vehicles according to claim 1, characterized in that: the linear motor (4) is provided with a limit mechanism that limits the maximum position of the linear motor (4) to move up and down . 5. The linear motor active suspension device for rail vehicles according to claim 4, characterized in that: the limit mechanism is composed of a limit column (10) fixed on the upper part of the linear motor (4), the limit The limit hole (10a) on the upper part of the column (10) fits on the wheel axle (12) of the bogie wheel set (3) of the vehicle body (1). 6. The linear motor active suspension device for rail vehicle according to claim 1, characterized in that the number of said servo actuators (8) can be one, two, three or four.

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