HYDRAULIC DRIVE PROTECTION SYSTEM Russian patent published in 2015 - IPC F15B20/00 

FIELD: construction.

SUBSTANCE: system comprises a hydraulic reservoir, a pump connected by a discharge hydraulic line with a hydraulic drive via a distributor, a line of drainage into the hydraulic reservoir and a stop device comprises a body with inlet, outlet and dead cavities, inlet, outlet and drain nozzles with channels, installed in the discharge hydraulic line and connected by its inlet cavity to the outlet of the pump, and by the outlet one - to the distributor. The drain nozzle is made in the form of a reduction valve. In the inlet cavity there is a spring-loaded plunger with radial holes, with an axial channel made at the side of the inlet cavity and communicated with the outlet cavity, in which there is a plunger of the outlet cavity installed, being spring-loaded at both sides and comprising a dead axial channel with radial holes, which communicate inlet and outlet cavities, and which passes with its one end via the hole of the plunger of the inlet cavity into the inlet cavity and slides in it, and by the other dead end it moves in the cylindrical dead cavity of the stop, which communicates with the outlet cavity by the channel stretching in the stop, and simultaneously with the outlet channel and the discharge hydraulic line, where the stop valve is installed. Besides, the stop device is equipped with a fixator in the form of a spring-loaded rod with a cone, and the plunger of the inlet cavity is equipped with a bore for the fixator.

EFFECT: increased efficiency of operation of a hydraulic drive protection system with simultaneous increase of performance, operational reliability and environmental safety of systems of protection of machine hydraulic drives.

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