Title:
ELECTRICITY-OIL PROPORTION TYPE RELIEF VALVE
Document Type and Number:
Japanese Patent JPS5891984
Kind Code:
A
Abstract:
PURPOSE:To set a relief pressure by an electric signal by providing a pressure control chamber communicated to a constant pressure chamber through an orifice, the orifice fitted to a vent circuit connected to the pressure control chamber, and an electrostriction element facing the orifice so as to communicate the pressure control chamber to the secondary pressure chamber behind a valve plug. CONSTITUTION:A poppet 6 blocks a fluid passage 4 by means of the fluid pressure in the secondary pressure chamber 7 and the spring force of a spring 8, and a relief pressure can be set in accordance with a fluid pressure introduced into the secondary pressure chamber 7. A pressure control chamber 15 communicated to the secondary pressure chamber 7 is communicated to a constant pressure chamber 13 through an orifice and is also communicated to a vent circuit 16 introducing the fluid in the pressure control chamber 15 outward through the orifice 17, and the aperture area of the orifice 17 can varied by an electrostriction element 18.
More Like This:
Inventors:
NISHIMURA KAORU
OGAWA WATARU
OGAWA WATARU
Application Number:
JP19136581A
Publication Date:
June 01, 1983
Filing Date:
November 27, 1981
Export Citation:
Assignee:
SHIMADZU CORP
International Classes:
F16K17/06; F16K31/383; (IPC1-7): F16K17/06; F16K31/06
Attorney, Agent or Firm:
Kazuhiro Akazawa