Device and valve for flow force compensation

US11307599B2 · kind B2 · utility

Assignee

• HYDAC FLUIDTECHNIK GMBH · DE

Inventors

• Markus Bill · Eppelborn, DE
• Frank Schulz · Blieskastel, DE

Key dates

• Filing date: Dec 17, 2018
• Grant date: Apr 19, 2022
• Expiry date: Dec 21, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K11/0716
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A device includes a regulating piston (12) guided longitudinally movably in a housing (10) and interacting with a control edge (56), at a pressure supply port (P) that supplies a utility port (A) in regulating positions of the regulating piston (12) with fluid. The pressure can be preset via a fluid connection, pulling the regulating piston towards a closed position blocking this fluid connection due to occurring flow forces. The regulating piston (12) has a change of shape (60) from its general outer basic shape in the area of the control edge (56) of the housing (10) for a flow force compensation. A flow contact surface for fluid is provided causing a compensating force acting against the flow force to be introduced into the regulating piston (12), which flow force pulls the regulating piston (12) into an open position opposite from the blocked position. The change of shape (60) also follows a step function, the function graph of which has at least one step more than the number of steps required to form the control edge (56).