COMPENSATOR FOR HYDRAULIC PROTECTION OF SUBMERSIBLE OIL- FILLED ELECTRIC MOTOR Russian patent published in 1998 - IPC

FIELD: hydraulic protection of submersible oil-filled electric motors of pumping plants for excavation of crude oil and other formation fluids. SUBSTANCE: proposed structure of compensator has head with axial holes for communication with space of electric motor and filling of it with oil. Elastic diaphragm which internal space is filled with oil is anchored leak-tight on central body and head. Relief valve in the form of plug used for communication and separation of internal spaces of compensator and electric motor is placed in axial hole of head. EFFECT: simplified manufacturing technology and mounting operations during pressure test of electric motor and lowering of structure into hole. 1 dwg