Title:
ELECTROHYDRAULIC SERVO DRIVE AND HYDRAULIC AMPLIFIER
Document Type and Number:
WIPO Patent Application WO2007097661
Kind Code:
A8
Abstract:
The electrohydraulic servo drive comprises a hydraulic motor, a pump, a reduction valve, a two-cascade hydraulic amplifier with a controllable throttle in the first cascade and a distributor in the second cascade, a power limiter, a pressure compensator, filling valves and a sensor of displacements of the hydraulic motor, a pinion-rack gear, an electromechanical converter controlling the throttle in the first cascade and communicating with the distributor of the second cascade provided with control chambers with the effective flow areas having the ratios 1.55oe.65. The hydraulic amplifier contains a cartridge, a movable bushing and a valve with three working collars, an intermediate collar and a guide, one of the control chambers is located from the side of the free endface and communicates through a channel in the valve, which the throttling port of a smaller diameter communicates with the second control chamber around the intermediate collar, meanwhile the throttling port of a larger diameter communicates with the surface of the guide carrying the movable bushing forming a throttle of the first cascade. The technical result is higher efficiency, easier fabrication and maintenance, a larger range of frequencies, better dynamic characteristics, such as a larger stability margin and a better quality of the transitional process.
Inventors:
VOLKOV SERGEY VLADIMIROVICH (RU)
KABESHKIN ALEXANDER ALEKSEEVIC (RU)
VOLODIN ZHORZH GAVRIILOVICH (RU)
BURAKOV MIKHAIL STANISLAVOVICH (RU)
LAZAREVICH ELENA NIKITICHNA (RU)
KABESHKIN ALEXANDER ALEKSEEVIC (RU)
VOLODIN ZHORZH GAVRIILOVICH (RU)
BURAKOV MIKHAIL STANISLAVOVICH (RU)
LAZAREVICH ELENA NIKITICHNA (RU)
Application Number:
PCT/RU2007/000076
Publication Date:
September 25, 2008
Filing Date:
February 16, 2007
Export Citation:
Assignee:
FED STATE UNITARY ENTPR CENTRA (RU)
VOLKOV SERGEY VLADIMIROVICH (RU)
KABESHKIN ALEXANDER ALEKSEEVIC (RU)
VOLODIN ZHORZH GAVRIILOVICH (RU)
BURAKOV MIKHAIL STANISLAVOVICH (RU)
LAZAREVICH ELENA NIKITICHNA (RU)
VOLKOV SERGEY VLADIMIROVICH (RU)
KABESHKIN ALEXANDER ALEKSEEVIC (RU)
VOLODIN ZHORZH GAVRIILOVICH (RU)
BURAKOV MIKHAIL STANISLAVOVICH (RU)
LAZAREVICH ELENA NIKITICHNA (RU)
International Classes:
F15B9/03; F15B3/00
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