HYDRAULIC PUMP, DIAPHRAGM, METHOD FOR DIAPHRAGM MANUFACTURE AND METHOD FOR DETECTION OF DIAPHRAGM DAMAGE Russian patent published in 2009 - IPC F16J3/02 F04B43/02 

FIELD: engines and pumps.

SUBSTANCE: device is designed for application in the field of pump engineering. Pump with hydraulic drive comprises the first chamber open for pumped liquid, the second chamber intended for storage of working fluid of hydraulic system and multi-layer diaphragm installed between the first and second chambers. Diaphragm includes the first layer in contact with pumped liquid, the second layer in contact with working fluid of hydraulic system and the third layer including highly elastic material of base and highly elastic current conducting path embedded into highly elastic material of base. The third layer is located between the first and second layers and may move relative to the first and second layers. Changes of electric resistance of current conducting path indicate failure conditions in the first, second or third layer.

EFFECT: higher reliability of pump operation.

31 cl, 16 dwg