At present, the commonly used oil cylinders include metallurgical equipment cylinder, engineering cylinder, vehicle cylinder and heavy duty cylinder, etc. these standard systems have many kinds of oil cylinders with a certain specification range, and are widely used in different places according to their performance. In construction machinery, lifting machinery, transport machinery, metallurgical machinery and forging machinery and other large mechanical equipment, the application of servo hydraulic cylinder (cylinder) is very common. In the past, there were many ways to measure and control the daily stroke of oil (gas) cylinder piston, such as using imported magnetic ruler, LVDT, sliding line resistance, magnetic induction switch and grating ruler. However, due to a variety of reasons - such as the imported magnetic ruler price is too high, the supply cycle is quite long, the after-sales service is not considerate; the stability and accuracy of LVDT can not meet its requirements well, etc. --- the above products can not meet the requirements of customers in all aspects. Later, more and more manufacturers used germanjet magnetostriction in oil (gas) cylinders Displacement sensor To measure and control. And our products have won more and more customers' favor with their moderate price, good stability, high precision and perfect and thoughtful after-sales service. The application of South China tire is an example. However, due to high temperature, high pressure, large measuring range and limited installation position of the head, some oil (gas) cylinders cannot be installed with built-in installation method. In this case, peripheral installation method can be used to solve the problem.
In built-in installation, magnetostrictive linearity Displacement sensor The installation thread of "magnetic ruler" shall be vertical to the mounting surface of servo hydraulic cylinder or cylinder; PTFE gasket or copper washer shall be used for sealing to ensure that the servo hydraulic cylinder or cylinder can work normally without leakage; the induction magnetic ring is fixed at the center of the piston; After passing through the center of the induction magnetic ring and piston rod, enough length should be reserved to ensure that the piston will not exceed the tail of the measuring rod and cause unnecessary economic loss or trouble. During external installation, the magnetic ruler is installed in parallel with the piston movement direction of the servo hydraulic cylinder or cylinder. The magnetic ruler is fixed by the mounting bracket provided by the magnetic ruler and the positioning screw of the servo hydraulic cylinder or cylinder end cover. The induction magnetic ring is fixed on the customized magnetic ring bracket, and a PVC sleeve is sheathed on the measuring rod of the magnetic ruler to protect the measuring rod of the magnetic ruler and guide the movement of the measuring rod.
High precision, fast frequency response and wide measurement range;
The output signal of the magnetic ruler can be connected to the secondary display instrument, single chip microcomputer, PLC or PC to form a closed-loop control system to realize automatic closed-loop control;
It solves the problem that the servo hydraulic cylinder or cylinder can not be directly measured due to the high temperature and high pressure generated during long-term operation;
The installation is convenient and fast. It can be directly installed by thread or fixed by bracket;
■ non contact measurement, good sealing performance, does not change the internal structure of servo hydraulic cylinder or cylinder, and has no impact on the overall performance of servo hydraulic cylinder or cylinder.