Gear-type pump or motor - slots in bearings on low pressure side barely penetrate into bearing bores

摘要

The machine comprises pinions meshing by means of external teeth, their spindles rotating in bearings arranged in spectacle pattern, slots being formed in the transverse direction in the bearings, in the same plane and adjacent to the pinion end faces. The slots (30, 31) are situated on the low pressure side, and penetrate only over a few millimetres into the bearing bores accommodating the spindles (20). They can be arc shaped, formed by a milling cutter, and intersecting the bores at the points where pressure is lowest. Bearing wear is no greater on the low pressure side than elsewhere.