Three application stages of large electric butterfly valve in subway operation
Metro has the advantages of convenience, punctuality and comfort in the urban public transport system. While pursuing safety and speed, metro vehicles constantly improve their ride comfort. The use of large electric butterfly valve suspension can significantly improve the running stability of the vehicle system, greatly simplify the structure of the steering frame, and make the bogie lightweight and easy to maintain. Generally speaking, the adoption of large electric butterfly valves by metro vehicles can be divided into three stages:
① Use the vertical characteristics of large electric butterfly valve to improve the vertical running stability of vehicle system;
② The vertical and horizontal characteristics of large electric butterfly valves are used together, the bolster in the secondary suspension device of the bogie is eliminated, and the bogie structure is simplified;
③ Make full use of the three-dimensional characteristics of large electric butterfly valves with large deflection (including torsion) and low lateral stiffness, eliminate the bolster, and completely realize the lightweight of the secondary suspension device of the bogie. At the same time, it is possible to adopt anti hunting electric butterfly valves, which can better coordinate the contradiction between the hunting stability of the bogie and good curve negotiation performance.