Figure 18From: Present Status and Prospect of High-Frequency Electro-hydraulic Vibration Control TechnologyNew type of electro-hydraulic vibration equipment for tamping device. 1. Main oil circuit; 2. Cylinder body; 3. Internal drainage passage; 4. Check valve; 5. Piston assembly; 6. Limit hole; 7. End cover; 8. Step motor; 9. Valve body; 10. Valve sleeve; 11. Spool; P: Oil supply port; T1: First oil return port; T2: Second oil return port; A, B: Load portBack to article page