Electrohydraulic digital control valve structure and working principle

Development: The early 1980s can be used to achieve computer-controlled electro-hydraulic system of new components, the current application of less methods: incremental digital valve Category: digital flow valve, digital pressure valve, digital directional flow valve Example: Incremental digital flow valve components: stepper motor, ball screw, valve, valve sleeve, stem, sensor, etc. Working principle: After the computer sends a signal, the stepper motor rotation, through the rolling screw into axial displacement, Driven the valve spool movement, first open the non-full-week throttling, the flow rate is small, and then open the full-week throttle, flow, up to 3600l / min. Features: 1. The valve core, valve sleeve, valve stem relative thermal expansion obtained temperature compensation, to maintain constant flow. 2. The valve has no feedback function, but with zero displacement sensor, the end of each control, the valve core can be under its control back to zero, higher repeat accuracy.

1.The material is 20CrMnTi/JIS-SCM415,the hardness is 56-60HRC,the carbon depth >0.8mmPrecision taper<=AT3.Chuck shank do -196℃ super-long cryogenic treatment and thermal aging treatment.Default of dynamic balance standard ,G6.3 18000rpm.Precision dynamic balance G6.3 12000RPM.Surface coating processing .
2.proove cleanness,precsion more stable ,surface more smooth,feel more comfortable and appearance nicer. Chuck surface is coated ,the layer is evenly ,Chemical plating solution dispersion degree of almost 100%,nickel layer is thin .This special coating can reduce Spindle abnormal wear and tear.Don't influence precision .
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