A semi-active air suspension device for high-speed trains with adjustable stiffness and damping

Abstract

The invention discloses a rigidity-adjustable and damping-adjustable type high-speed train semi-active air suspension device comprising an air spring mechanism and a control device mechanism. The control mechanism comprises a connection assembly, a cylinder body assembly and a fixed base. The cylinder body assembly comprises a cylinder barrel full filled with magnetorheological fluid. A piston rod I, a cylinder head, a damping piston I, a damping piston II, a piston rod II, a supporting spring, a partition plate, a damping piston III, a piston rod III and a cylinder bottom cover are sequentially arranged in the cylinder barrel from top to bottom. The outer cylinder faces of the damping piston I and the damping piston III are each provided with an inwards-concave structure in the circumferential direction, and exciting windings are wound around the outer cylinder faces of the damping piston I and the damping piston III in the peripheral direction correspondingly. The inner cylinder face, in clearance fit with the piston rod I, of the damping piston II is provided with an inwards-concave structure in the peripheral direction, and an exciting winding is wound around the inner cylinder face, in clearance fit with the piston rod I, of the damping piston II in the peripheral direction. By means of the rigidity-adjustable and damping-adjustable type high-speed train semi-active air suspension device, continuous regulation of the throttling hole opening degree between a main air chamber and an additional air chamber of the air spring can be achieved, the adaptability of a high-speed train to different operation working conditions can be improved, and the rigidity-adjustable and damping-adjustable type high-speed train semi-active air suspension device is particularly suitable for high-speed train secondary suspension systems.

Description

Technical field [0001] The invention relates to a semi-active air suspension device, in particular to a semi-active air suspension device for high-speed trains with adjustable stiffness and damping, belonging to the technical field of high-speed train equipment. Background technique [0002] The high-speed train operation makes the vibration amplitude larger during the operation process, which seriously affects the smoothness and riding comfort of the train operation, and also causes certain harm to the physical and mental health of the staff who work on the high-speed train for a long time. In addition, severe vibration can damage train parts and shorten its service life. The secondary suspension is a suspension device between the bogie frame and the car body. It is mainly composed of a central spring and various shock absorbers. Its main function is to support the car body and dampen vibration. [0003] At present, the secondary suspension of high-speed trains in my country gene...

AI Technical Summary

Problems solved by technology

However, due to the fixed opening of the throttle hole, this suspension method cannot achieve the best stiffness response according to different operating conditions of the vehicle; in addition, because the throttle hole is used instead of the vertical damper to provide the vertical damping required by the suspension system, This suspension method makes the vertical damping of the system unable to be adjusted adaptively, and in actual situations, the damping generated by only relying on the orifice is far from meeting the requirements of the system for vertical damping

Images