ELECTROHYDRAULIC CIRCUIT AND AIRCRAFT - MITSUBISHI HEAVY IND LTD

Title:

ELECTROHYDRAULIC CIRCUIT AND AIRCRAFT

Document Type and Number:

WIPO Patent Application WO/2021/149415

Kind Code:

A1

Abstract:

An electrohydraulic circuit (1) and an aircraft comprise: a supply oil path (90) connecting an oil supply device (10) that supplies hydraulic oil, and a drive unit (20) driven by the hydraulic pressure of the hydraulic oil supplied from the oil supply device; a switching valve (30) which is provided to the supply oil path and which switches a plurality of switching oil paths of the hydraulic oil supplied to the drive unit; a pilot hydraulic path (94) which is connected to the switching valve and which supplies hydraulic oil that provides a pilot hydraulic pressure for switching the switching hydraulic paths of the switching valve; a check valve (50) provided to the pilot hydraulic path (94); an electromagnetic valve (60) which is provided to the pilot hydraulic path, on the downstream side of the check valve in the circulation direction of the hydraulic oil, and which switches the states of the hydraulic oil supply to the switching valve; a sealing material (38) which is provided to the switching valve and which seals the hydraulic oil that provides the pilot hydraulic pressure; and a third open valve (40) which is provided to the pilot hydraulic path, on the downstream side of the check valves in the circulation direction, and which can release the pilot hydraulic pressure in the pilot hydraulic path.

Inventors:

TAKEUCHI MOTOYASU (JP)
ABE TOSHINORI (JP)
SUZUKI KAZUYUKI (JP)
NIWA HIDEKI (JP)

Application Number:

PCT/JP2020/047102

Publication Date:

July 29, 2021

Filing Date:

December 17, 2020

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
NABTESCO CORP (JP)

International Classes:

F15B11/08; B64C13/40; F16K11/07

Foreign References:

JP2004100727A	2004-04-02
JPS5139832U	1976-03-25
JP2007046790A	2007-02-22

Other References: