Japan's SMC electromagnetic valve in the electromagnetic coil dynamic electromagnetic relationship can ensure the smooth work of magnetic machinery products, on the other hand, it also affects the performance of this type of mechanical products. When studying the passive vibration reduction of electromagnetic dampers, Zhengshuiying and others considered the influence of the wave current generated by the dynamic electromagnetic relationship on the damping characteristics of dampers, and concluded that the theoretical values and experimental values are in good agreement. When Lihuimin and others studied the support characteristics of electromagnetic auxiliary support, the induced current caused by the dynamic electromagnetic relationship of electromagnetic coil was introduced into the theoretical model, which better explained the error between the theoretical value of the support parameter and the experimental value in the experiment. phenomenon. The above research shows that the dynamic electromagnetic relationship of electromagnetic coil can not be ignored. However, at present, the study of the dynamic electromagnetic relationship of electromagnetic coils is only aimed at a certain mechanical product, and the relative content of the research content is relatively divided. Few people systematically analyze it.
By analyzing the induction electromotive force and dynamic impedance of the SMC solenoid valve in Japan under different circumstances, the expression of induced current due to the change of excitation current and gap is obtained, and its rationality is analyzed and discussed. Finally, the dynamic electromagnetic relation is applied to the variable stiffness electromagnetic support device of the mechanical system, and the expressions of additional support stiffness and additional damping parameters of the electromagnetic support device under different circumstances are obtained. The phenomenon of additional stiffness and damping parameters in the experiment is explained.
Japanese SMC solenoid valve consists of electromagnetic components and valve body. Electromagnetic components are composed of fixed iron cores, moving iron cores, coils and other components; The body part is composed of a sliding valve core, a sliding valve sleeve, and a spring base. When the coil is energized or cut off, the operation of the core will cause the fluid to pass through the body or cut off for the purpose of switching or changing the direction of the fluid. The electromagnetic valves used in the safety interlock protection system mainly have two three-way, two four-way and two five-way. The meaning of the two is: for the electromagnetic valve, it is charged or decharged, and for the controlled valve It is open or closed.
The two three-way Japanese SMC solenoid valve consists of a valve body, a valve cover, an electromagnetic assembly, a spring and a sealing structure. The seal block at the bottom of the moving iron core closes the valve body intake with the pressure of a spring. When power is obtained, the coil excitation, the electromagnet suction, the seal block with spring on the upper part of the moving iron core closes the outlet, and the air flow enters the valve from the air inlet to play a control role; When the power is lost, the electromagnetic force disappears, and the moving iron core moves downward from the fixed iron core under the spring force. The exhaust outlet is opened and the air intake is blocked. The valve changes the switch state due to the loss of gas.
The principle of the two four-way and five-way Japanese SMC solenoid valves is the same, except that the four-way has one exhaust port and the five-way has two exhaust ports. Their working principle: When there is an electric current passing through the coil, a excitation effect is generated, the iron core is fixed to absorb and move the iron core, and the moving iron core drives the sliding valve core and compresses the spring, changing the position of the sliding valve core, thus changing the direction of the fluid.; When the coil loses power, rely on the spring's elastic force to push the sliding valve core, top back to move the iron core, so that the fluid flow according to the original reassuring flow.