Abstract
A digital hydraulic valve is an important component of the digital hydraulic system, and its performance is directly related to the system function. In order to make the valve system more competitive in dimension, digital valve miniaturization is an important research point. A new micro digital valve is designed, which is analyzed from the mechanical structure and magnetic circuit mechanism, and the design difficulties are also expounded. The four subsystems and switching characteristics of the valve are theoretically analyzed and simulated. In order to test the performance of the valve, a test system is designed, and performance of the new micro valve is tested. The test results show that the switch characteristic analysis of the valve is correct. The comparison between the test curve and the simulation curve is carried out, which demonstrates that the accuracy of the simulation model is reasonable. The theoretical analysis of the new micro digital valve is consistent with experiments.
Highlights
Compared with the traditional proportional/servo technology, the digital hydraulic system has advantages of anti-pollution, high redundancy, fast response and so on [1,2,3]
In order to make the digital valve have greater competitive advantage in flow resolution and response speed, the research of digital valve focuses on miniaturization
It is not necessary to maintain the state of the valve, which saves energy in the process of valve operation
Summary
Compared with the traditional proportional/servo technology, the digital hydraulic system has advantages of anti-pollution, high redundancy, fast response and so on [1,2,3]. A small bistable valve with outer diameter of 31 mm was developed [4] This miniature valve uses permanent magnet materials. The second generation of micro electromagnetic valve with outer diameter of 11 mm has been developed in 2011 [13], which can be seen in Ref. Considering the special working conditions, the size of the micro valve is mm, the maximum working pressure is MPa and the flow rate is 2 L/min by the optimization of the valve body material and the matching of the parameters of the electromagnetic field.
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