BARRIER PACKING OF HYDRAULIC CYLINDER ROD Russian patent published in 2015 - IPC F16J15/56 

FIELD: machine building.

SUBSTANCE: invention relates to ship building, in particular, to rod packing units. The barrier packing of a hydraulic cylinder rod comprises a movable rod with a packing unit for it including a guide bush with an outer end collar thrusting against the hydraulic cylinder cover. The guide bush of the rod packing unit is made of two compound parts each of which is additionally fitted by the outer and inner sealing rings and comprises an end collar with an under-collar ring, with the help of the said components one of the parts thrusts against the hydraulic cylinder cover and can press the latter, and the other one - against the hydraulic cylinder body via a thrust ring. Both above parts are divided by an additional bush set on the rod, and the cavity formed inside the hydraulic cylinder is connected to a channel by a hydraulic compensator. The compensator consists of two cavities separated by a movable rubber membrane and a signalling unit with its plate being a support for the membrane in its lower position. The cavities under the compensator membrane and inside the rod packing unit are filled by operating fluid, and the cavity above the compensator membrane is made open to the medium surrounding the device.

EFFECT: invention improves reliability of the device.

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