Active radial execution system of bogie and control method

Abstract

The invention relates to an active radial execution system of a bogie and a control method. The system comprises a radial controller and a hydraulic system, wherein the hydraulic system comprises a hydraulic power unit and a plurality of radial actuators; the train network or a bogie radial system controller, the hydraulic power unit and each radial actuator are connected to the radial controller,the hydraulic power unit is connected with each radial actuator, the hydraulic power unit is used for providing a high-pressure hydraulic power source for each radial actuator, the radial controllercontrols starting and stopping of the hydraulic power unit and output pressure, action of each radial actuator, monitoring system fault state and the like, and each radial actuator receives a controlinstruction sent by the radial controller and is kept parallel to an axle of the bogie or forms an included angle. According to the radial actuators, the state of a piston rod of an oil cylinder can be rapidly changed, so that the bogie can be adjusted along with the radius of a rail in time, the acting force of a wheel rail is reduced, the wheel abrasion is reduced, and the service life of the radial actuators is prolonged.

Description

technical field [0001] The invention belongs to the technical field of bogies, and in particular relates to an active radial actuation system and a control method of a bogie. Background technique [0002] The active radial bogie is based on the original bogie structure, and a radial actuator is installed between the frame and the wheel set, which can realize the application of active force or active moment to the wheel set. When the vehicle is running in a straight line, each radial actuator is locked at the middle position. In a fault state, each radial actuator is locked at the limit position, which can ensure that the vehicle can run normally on straight and curved lines, and ensure that the wheelset axes are parallel And it has enough positioning stiffness; when the vehicle is running on a curve, the radial controller controls the action of the radial actuator, so that the axis of the wheel set tends to the radial position on the curve, so that the angle of attack of the...

AI Technical Summary

Problems solved by technology

[0005] Although the electromechanical actuator has a simple structure, low cost, no risk of hydraulic oil leakage, and good self-locking performance, it has the following disadvantages: ① Long-term wear and tear of the transmission mechanism; ② The structural size is relatively large when it needs to output a large load , while the general bogie has limited space and is difficult to place; ③In the case of sudden power failure, control system failure and other fault conditions, it is difficult to implement a fault-oriented safety strategy

Although the pump-controlled electrostatic hydraulic actuator has a high degree of integration, is easy to maintain and replace, can output large loads, and has no external pipelines to reduce the risk of leakage, it has the following disadvantages: ① Due to the integration of motors, pumps, and valve groups Components such as cylinders and oil cylinders are relatively large in size; ②In the state of power failure of the system or the failure of components such as motors and pumps, there is no effective safety mechanism, and the piston rod of the actuator is in a free state, which endangers driving safety

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