HYDRAULIC SYSTEM FOR LOADING OF AIRCRAFT STRUCTURES AT STRENGTH TESTINGS Russian patent published in 2007 - IPC G01M5/00 

FIELD: test equipment.

SUBSTANCE: the hydraulic system has a power exciter, electrohydraulic amplifier, load limiter, interlocking valves, flow rate control valves, drain valves, check valves, distribution valve. The interlocking valves are made in the form of double-line two-position distributors with an electric control. The electrohydraulic amplifier accomplishes the delivery of working fluid to one of the spaces of the power exciter and the drain from the other, with the interlocking valves installed in their lines. The distribution valve is made in the form of a three-line three-position distributor with an electric control, it is installed in the working fluid drain lines from the spaces of the power exciter, the distribution valve accomplishes the delivery of fluid from the delivery line where the flow rate control valves and the drain valves are installed. The check valves are used to reduce the residual pressure in the spaces of the power exciter during the drain of the fluid, the control of the distributors is accomplished from the automatic control system.

EFFECT: enhanced reliability of protection of the test object and simplified operation of the test rig.

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