Title:
PRESSURE COMPENSATION UNIT
Document Type and Number:
WIPO Patent Application WO/2017/094454
Kind Code:
A1
Abstract:
A pressure compensation unit comprises: a control valve that controls supply and discharge of a hydraulic liquid to and from an actuator, said control valve comprising a pump port, a pair of relay ports, a pair of supply and discharge ports, and a tank port; a pressure compensation valve that is connected to the pair of relay ports by an upstream relay line and a downstream relay line and that operates according to the pressure difference between the pressure of the upstream relay line and a signal pressure; a load pressure detection line that branches from the downstream relay line; a relief line that is connected to the downstream relay line, said relief line having a relief valve provided therein; and a switching valve that is configured so that the maximum load pressure that serves as the signal pressure is guided to the pressure compensation valve when a hydraulic liquid is not flowing in the relief line and the pump pressure that serves as the signal pressure is guided to the pressure compensation valve when a hydraulic liquid is flowing in the relief line.
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Inventors:
HATANAKA YASUNORI
MATSUO MASAHIRO
MATSUO MASAHIRO
Application Number:
PCT/JP2016/083083
Publication Date:
June 08, 2017
Filing Date:
November 08, 2016
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B11/05; F15B11/00
Domestic Patent References:
| WO2001055603A1 | 2001-08-02 |
Foreign References:
| JP2009281587A | 2009-12-03 |
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (JP)
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