An eccentrically mounted rotor is located in the pump cavity, having a number of slotted grooves evenly spaced around the circumference. Freely sliding metal plates - blades - are installed in these grooves. When the rotor rotates, the plates under the action of centrifugal force come out of the grooves and come into contact with the walls of the pump cavity. Injection occurs due to a change in the volume enclosed between pairs of adjacent blades. This change in volume occurs due to the eccentricity of the installation of the rotor. Such pumps develop a pressure of about 8-13 MPa (80-130 bar).
VN 6.004 The figure shows two types of power steering hydraulic pumps installed 1. Hydraulic pump (with internal oil tank); 2. Oil tank cap with oil level dipstick; 3. Pulley; 4. Bolt; 5. Bolt; 6. Hose; 7. Collar; 8, Cooling coil; 9. High pressure line; 10. Tube; 11. O-ring; 12. Collar; 13. Nut; 14. Bolt; 15. Bracket; 16. Nut; 17. Hydraulic pump (with separate oil tank); 18. Oil tank; 19. Bolt; 20. Hose; 21. Bolt; 22. Collar