Rotary vane pump for brake booster in motor car, has chambers whose longitudinal ends are rotatably fixed in inner space along inner circumference trajectory, and roller bearing device provided at rotor in region of slot

摘要

The pump (1) has a rotor (3) provided with a slot. A wing (5) passes through an inner space (2) that is divided into two chambers. Longitudinal ends of the chambers are rotatably fixed in the inner space along an inner circumference trajectory (6), and transversely slide along a rotational axis in the slot of the rotor. A roller bearing device (7) is provided at the rotor in a region of the slot. The roller bearing device is provided with four rolling bodies. The rotor and the wing are made of plastic. The roller bodies are rotated in opposite walls of the slot.