In the hydraulic cylinder, in order to maintain its flow stability, in order to ensure normal operation, we need to use the speed control valve to adjust its flow. However, throttling regulation type speed regulating valve after adjusting its throttle orifice, sometimes it will cause traffic instability problems. This problem is more likely to occur, especially at minimum steady flow rates. So, why is that?
To solve this problem, we find that there are many reasons for this problem. The reasons include: locking device is loose, throttling orifice is blocked, oil temperature of hydraulic cylinder is raised, inlet and outlet cavity is low, pressure difference is too low, and inlet and outlet cavity is reversed. So, how should we solve such a problem? We all know, in order to ensure that the flow control valve flow control accuracy, then you need to ensure a certain pressure difference.
In order to meet this requirement, so we in the choice of control valve, should pay attention to the general type of product the pressure shall not be less than 0. 5MPa, if for high precision, so the pressure should be guaranteed at about lMPa. In addition, if the temperature of the hydraulic cylinder operating environment changes greatly, then it is better to choose a temperature compensated valve.
Need to remind you is, if the control valve pressure is too small, so the valve part cannot guarantee the normal work, so it can not be the pressure compensation effectively, so the hydraulic cylinder is difficult to maintain a steady flow. If the selected valve through the actual flow is too small, then it will lead to partial loss of pressure is too large, so easy to cause oil temperature is too high, and, in a very serious way, even lead to the whole system can not function properly.