GAS FLOW RATE CONTROL VALVE Russian patent published in 2016 - IPC F16K5/12 F16K5/04 

FIELD: machine building.

SUBSTANCE: claimed valve consists of the body with inlet and outlet pipes, seat, flap and shaft to contact with said flap. On one side said shaft runs in antifriction bearing. Bearing inner race contacts with said shaft via washer. Said shaft is fitted in graphite antifriction bearing on opposite side. Conical recess is made coaxially with the shaft outer cylindrical surface in the shaft end surface, said shaft being squeezed by graphite and rubber bushes. Graphite bush is composed of ball layer in contact over spherical surface with graphite antifriction bearing inner cylindrical surface and with cone conjugated therewith, axially symmetric with spherical surface of ball layer and resting on the shaft conical recess by its top. Recess cone top angle is smaller than angle at the vertex of the shaft conical recess.

EFFECT: higher reliability of the valve owing to ruled out shaft shift before valve actuation.

3 cl, 2 dwg