一种低温气动截止阀摩擦力在线测试方法

• Format: Patent
• Language: Chinese
• Published: 16.06.2023
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MECHANICAL ENGINEERING; PHYSICS; TAPS; TESTING; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

本发明涉及一种低温气动截止阀摩擦力在线测试方法，属于气动机构摩擦力测试领域。本发明利用现有的控制气源和气路，测量阀门控制气路的管道长度；测量阀门开启时，气缸带动阀杆从下限位置运动到上限位置的时间；利用等温管道一维气体动力学方程，计算阀门气缸的压强；利用平衡状态的力学方程计算出大型低温气动截止阀阀杆的摩擦阻力。本发明解决了现有低温加注系统上百个大型低温气动截止阀摩擦力无法在线测试的问题，为掌握大型低温气动截止阀润滑状态、识别阀杆卡滞故障隐患、确保系统和设备安全稳定运行提供保障，极大地提高了测试工作效能。 The invention relates to a low-temperature pneumatic stop valve friction force on-line testing method, and belongs to the field of pneumatic mechanism friction force testing. The method comprises the following steps: measuring the pipeline length of the valve control gas circuit by using an existing control gas source and an existing gas circuit; measuring the time when the cylinder drives the valve rod to move from the lower limit position to the upper limit position when the valve is opened; calculating the pressure intensity of a valve cylinder by utilizing an isothermal pipeline one-dimensional gas kinetic equation; and calculating the frictional resistance of the valve rod of the large low-temperature pneumatic stop valve by using a mechanical equation in