Rotary positive displacement fluid machines - has lubricating oil and sliding vane vacuum pumps in rotatable hollow shaft and separated by plate

摘要

The pumping unit is for a motor vehicle I.C. engine with comprises a lubricating oil pump (1) e.g. of the gear type and a vacuum pump (6) e.g. of the sliding-vane type, for the braking system. The unit is in use partially submersed in an oil sump of the engine. An oil-pump rotor (2) and a vacuum-pump rotor (8) are fixed to a rotatable hollow shaft (13) and are separated from each other by a plate (16). The delivery side of the oil pump is connected intermittently by way of channels (22, 23) in the rotor (2) and the plate (16) to a radial passage (25) in the shaft, which also comprises outlet passages communicating with oil channels (28, 29) in the vacuum-pump rotor.