伺服阀端盖预紧力矩对零位影响分析及优化

Analysis and Optimization of Influence of the Preload Torque of Servo Valve End Cover on the Mechanical Zero Position

介绍某形式的伺服阀端盖结构,对该位置结构的受力情况进行分析,利用有限元软件仿真预紧力矩对端盖结构应力、应变的影响。经分析得出:较大的预紧力矩不仅有引起端盖材料破坏的风险,同时也会引起伺服阀机械零位的变化,从而对伺服阀性能的稳定性产生不利的影响。通过分析改进措施,选取了合适的预紧力矩及防松措施。实践结果验证了改进措施的有效性。

The structure of a certain type of servo valve end cover was introduced.The structure stress condition at the position was analyzed.The effect of preloading torque on the stress and strain of the end cover structure was simulated using finite element software.Through analysis,it is concluded that a large preload torque not only causes the damage risk to the end cover material,but also causes the change of the mechanical zero position of the servo valve,thus adversely affecting the stability of the servo valve performance.By analyzing improvement measures,appropriate preload torque and anti-loosening measures were selected.The practical results verify the effectiveness of the improvement measures.