基于工控机与PLC控制的液压动态加载平台研究

Hydraulic dynamic loading platform based on industrial computer and PLC control

针对滑动螺旋副机械效率检测试验中,采用手动或者半自动加载方式时加载精度较低、加载实时性差、机械效率波动范围较大的问题,对滑动螺旋副检测平台、检测系统、检测方法等进行了研究,提出了一种基于工控机与PLC控制的液压动态加载平台。首先对加载系统的概况进行了阐述,然后对加载系统的硬件进行了设计,包括系统硬件电路、系统液压回路;再对加载系统的软件进行了设计,包括上位工控机软件、PLC程序;最后对滑动螺旋副进行了模拟加载实验以验证。研究结果表明:该系统可实现恒载、保压、变载等多种加载方式,同时可对加载过程进行动态监控,实时采集滑动螺旋副所受的加载力和转矩;加载力精度达到98.85%,机械效率波动范围小于5%。

Aiming at the problem of low loading accuracy,poor real-time loading and large fluctuation range of mechanical efficiency caused by manual or semi-automatic loading in the mechanical efficiency test of sliding spiral pair,the sliding spiral sub-detection platform,detection system and detection method were studied.A hydraulic dynamic loading platform based on industrial computer and PLC control was proposed.Firstly,the general situation of loading system was described.Then the hardware of the loading system was designed,including the hardware circuit and the hydraulic circuit of the system.The software of loading system was designed,including PC software and PLC program.Finally,the simulated loading experiment of sliding screw pair was carried out.The results show that the system can realize a variety of loading methods,such as dead load,pressure holding and load change,the loading process could be dynamically monitored,the loading force and torque of the sliding screw pair could be collected in real time,the loading force accuracy is reached 98.85%,the mechanical efficiency fluctuation range is less than 5%.