Displacement pump i.e. vane pump, for power steering of motor car, has printed circuit boards arranged between control plates and rotor in addition to curve ring, and including through holes, which flush with supply kidneys and/or channel

摘要

The pump has working chambers (6) formed between a curve ring (4) and a rotor (3), and divided by working disks (5) i.e. wings. The chambers are limited by control plates (8, 9) in an axial direction. Holes for a drive shaft, a supply kidney (10) and a rear wing supply kidney (11) are formed in the plates for oil supply for the disks and the chambers. Printed circuit boards (12, 13) are arranged between the plates and the rotor in addition to the curve ring. The boards include through holes (14, 14a), which flush with the supply kidneys and/or a rear wing supply channel in the control plates.