Introduction of internal pressure valve of dowty retarder

The performance of dowty retarder is mainly determined by its internal pressure valve. Through the understanding of the functional principle of the dowty retarder, we know that there are many important technical parameters of the dowty retarder, such as critical speed, opening pressure, vertical reaction force, braking work, etc., which are related to the structure, dynamic and static performance of the Leli valve. For example, the critical speed and the opening pressure depend on the spring adjustment of the pressure valve.

In addition, the vertical reaction force of dowty retarder is a very important parameter. In the process of retarder working, due to the reasons of installation and action mode, there is inevitable vertical reaction force, which is the main cause of derailment accident. The vertical reaction force of retarder increases with the increase of vehicle speed, which is determined by the structure and dynamic characteristics of retarder pressure valve.

The vertical reaction force of dowty retarder increases with the increase of vehicle speed, which is determined by the structure and dynamic characteristics of retarder pressure valve. With the increase of vehicle speed, the oil flow through the pressure valve causes the pressure in the upper chamber to increase and the dynamic pressure to overshoot; the higher the vehicle speed, the greater the pressure overshoot and the greater the vertical reaction force, the more likely the derailment will occur.