| 摘要 |
A vane pump provided with a center housing, front and rear housings holding the center housing therebetween, a rotor eccentrically disposed in the center housing and rotatably supported by the front and rear housings, a single vane diametrically movably inserted in the rotor, and a guide for regulating the projection of the vane out of the rotor. The guide comprises an axle provided centrally on each side of the vane, a circular hole formed in the inner surface of each of the front and rear housings and having a center positioned just in the middle between both centers of the rotor and the center housing, and a rolling bearing interposed between the axle and the circular hole to guide the axle in a circular path having a diameter equal to the eccentricity of the rotor. The center housing has an inner surface with a cross-sectional profile that is firstly drawn by the tip of the vane when the rotor turns and then expanded by a preselected clearance.
|
