Abstract:The matching accuracy requirements of servo valve throttling devices are very high, and traditional flow matching methods have the problem of poor matching accuracy, which directly affects the stability of servo valve products. In response to the problem of low flow rate and low matching accuracy of throttle parts in the servo valve industry, this article conducts a study on the matching method of small hole flow rate in servo valve throttle based on the hydraulic bridge method. By establishing an AMESIM platform, the impact of different flow rates of throttle on the front stage pressure and the servo valve machine is analyzed, and the new matching method is verified through experiments. The experimental results show that this testing method can effectively meet the high-precision requirements for matching servo valve products with throttling devices, and has the characteristics of convenient operation and high resolution. This structural form can also be extended to other similar high-precision matching situations for small hole parts.