Hydraulic valve i.e. linear spool valve, has housing provided with valve bore, and control piston movably arranged in bore and rotationally secured relative to housing using permanent magnets

摘要

The valve has a housing (10) provided with a valve bore (11). A control piston (20) is movably arranged in the bore and is secured around its longitudinal axis relative to the housing. The piston is rotationally secured relative to the housing using permanent magnets (30, 31). The magnets are arranged such that magnetic flux radially influences magnetic field produced by the magnets. The magnets are inserted in recesses at the piston and the valve housing. The housing is provided with a housing rod (12) and a valve housing annular chamber (13).