CENTRIFUGAL PUMP Russian patent published in 2002 - IPC

FIELD: mechanical engineering; pumps. SUBSTANCE: invention can be used in centrifugal fuel pumps provided with systems cutting off pump with simultaneously cooling its members. Proposed centrifugal pump has impeller mounted on shaft and provided with inlet and output locking devices. Impeller is arranged in pump working space coupled with pumping out device. Pump sealing unit is installed on shaft and is arranged in intermediate space of pump connected with working space through radial clearance formed by cylindrical hub of impeller and housing, and through end face clearance formed by end face non-working surface of impeller and housing. Pump low pressure space is located before makeup pump coupled with inlet space of pump. Jet is installed on main line coupling inlet space of pump with intermediate space. Pumping out device is made in form of ejector whose nozzle is directly coupled with working space. Inlet of ejector chamber is coupled with inlet space of pump and outlet of ejector chamber is coupled with low pressure space. Outlet locking device is made in form of seat arranged in housing and rotary gate engaging with seat and coupled with guide furnished with hydraulic brake and connected with hinge joint secured in housing by means of lever. EFFECT: improved reliability of pump, increased service. 3 cl, 2 dwg