Structure Design And Pressure Drop Analysis Of A Double Coil Magnetorheological Valve

The traditional hydraulic valve generally consists of mobile mechanical parts，and hydraulicvalve Control of the hydraulic system by relative motion of Internal mobile parts. Valve core of allkinds of hydraulic valve need relative motion when in work, and so there are some disadvantageson traditional hydraulic valves, for example, complicated process, high machining precision, highcost, complex structure and lack of control. So the current research direction is researchinghydraulic control valves whose working medium is intelligent materials so to solve thedisadvantages of traditional hydraulic valves.Magneto-rheological fluid is a intelligent materials which can generate shear stress instantlyunder the action of plus incentive of magnetic. The magneto-rheological valve is designed based onthe controlled rheological properties of the magneto-rheological fluid. working medium ofmagneto-rheological valve is Magneto-rheological fluid,and it generally consists of the valve body,valve core, and cover parts and the working gap of magneto-rheological valve is the gap betweenvalve body and valve core. There are no mobile parts so magneto-rheological valve has simplestructure is good at controlling.In this paper, the research content includes:(1) This paper designed a kind of double-coil and ring type work gap magnet-rheologicalvalve，some key problems of magneto-rheological valve design is discussed and the maindimensions is preliminarily selected according to the design requirement. On the magnetic circuitcalculation，design rationality of some key dimensions is checked and the promises coil number iscalculated.(2) Magnetic field simulation of double coil magneto-rheological valve is carried out by usingANSYS software, in addition, reasonable simulation parameters as well as physical model is set andthe simulation results for reprocessing and the simulation analysis is done. Whereafter theoptimization design is processed to the double-coil magneto-rheological valve, The target ofoptimization design is to effectively delay the phenomenon of magnetic saturation in themagneto-rheological valve, increase the efficiency of the magneto-rheological of MR valve,effectively increase the magneto-rheological valve pressure drop and controllable range andincrease its’ control performance.(3) Pressure drop characteristics model of double coil magneto-rheological valve is set up andthe mathematical formula of pressure drop characteristics model is reasoned out. The pressuredrop characteristics of performance simulation of double coil magneto-rheological valve isprocessed by using the MATLAB software, these performance simulation includes the influence of the pressure drop made by work gap, work flow and valve core radius and so on.(4) The corresponding hydraulic components of experimental test is selected according to thedesign of the magneto-rheological valve performance,these hydraulic components includes motor,gear pump, regulated the overflow valve, relief valve, flow meter, load pressure transmitter andother essential components of test system and these hydraulic components are assembled on thebasis of test schematic diagram. Then the pressure drop characteristics of double coilmagneto-rheological valve is tested and analyze experimental test data when magneto-rheologicalvalve under different conditions, so correctness and rationality of the magneto-rheological valvedesign theory is verified through the magneto-rheological valve test.