Figure 14
From: Present Status and Prospect of High-Frequency Electro-hydraulic Vibration Control Technology
2-DOF high-speed on-off valve. 1. Valve sleeve; 2. Oil supply port; 3. Inlet annular passage; 4. Outlet annular passage; 5. Pump case (integrated with valve sleeve); 6. Rotary spool; 7. Right spool displacement control outlet; 8. Oil return port; 9. Load port; 10. Left spool displacement control outlet; 11. Outlet turbine blade; 12. Inlet turbine blade; 13. PWM control area; A: Oil return flow increasing direction; B: Load flow increasing direction; C: Spool rotary direction; S: Flow direction of supply oil; L: Flow direction of load flow; T: Flow direction of return oil