Proportional valve with a piezoelectric actuator

Abstract

Abstract. The article concerns a slotted proportional valve for use in pneumatic and hydraulic systems. There is a growing demand for both hydraulic and pneumatic ultrafast proportional valves. The conducted analysis of literature confirms the lack of such solutions for proportional valves. The currently used pneumatic systems for selection and segregation of parts and objects require ultrafast valves. The presented solution for the proportional valve can significantly improve and accelerate this type of technological processes. Furthermore, fast proportional valves can be successfully used for positional control of pneumatic and hydraulic drives. The article presents the design of a slotted divide valve and sets the maximum mass flow rate for service roads.

Nonlinear coupled dynamic effects in flexure-amplified piezoelectric valve with an analytical transfer function

“…However, strokes of commercially available piezoelectric stacks are much small with the deformation of about 0.1%-0.15% of their length, limiting 1 the flow rate. Therefore, some flow control valves [20][21][22][23][24][25][26][27] were designed by using amplified piezo-stacks with compliant mechanisms. Compliant mechanisms of monolithic piece mechanically amplify the micro stroke of piezoelectric actuators without wear and backlash, and the requirement of assembly is largely reduced.…”

Bulletin of the Polish Academy of Sciences: Technical Sciences

“…Although pneumatic drives have been known for many decades, new papers are still being reported. They present solutions for theoretical models that focus on drives dynamics [1,2] tracking positioning [3], friction in insulating nodes [4,5], innovative control valves [6,7], flexible muscle [8][9][10] drives or heat transfer of the operating medium [11] as well as modeling of the medium flow [12]. Positional and follow-up control of pneumatic drives are complicated issues and require use of modern valves with high dynamics and taking innovative approaches to applying algorithms and controllers.…”