Description
Woodward 8528-105
Technical Specifications
- Force Capacity: Increased piston area and hydraulic pressure rating for higher thrust.
- Stroke Length: Customizable stroke to match specific fuel pump or valve requirements.
- Feedback Device: High-resolution LVDT with excellent temperature stability.
- Supply Pressure: Compatible with elevated hydraulic supply pressures for faster response.
- Electrical Interface: Industry-standard analog input and feedback output.
Functional Features
- Enhanced Durability: Oversized bearings and seals for extended service life in continuous duty.
- Fast Dynamic Response: Optimized internal flow paths for rapid valve positioning.
- Zero Leakage: Precision-lapped spool and valve body minimize internal leakage.
- Manual Override: Optional manual override mechanism for emergency fuel control.
Application Scenarios
Ideal for large-bore marine diesel engines, heavy-duty mechanical drives, and steam turbine stop valve actuation.
Performance Parameters
- Positional Stability: Exceptional hold capability with minimal drift under varying loads.
- Cyclic Life: Rated for millions of full-stroke cycles without degradation.
- Temperature Compensation: Feedback device calibrated to minimize thermal drift.
Material Composition
Constructed from high-strength alloy steel with specialized surface treatments for corrosion and wear resistance. Internal components are polished to mirror finishes to reduce friction.
Structural Characteristics
- Housing: Rugged cast iron or steel housing with integrated mounting flanges.
- Sealing: Multi-stage sealing arrangement to prevent external leaks.
- Accessibility: Easy-access calibration ports and electrical connections.
Working Principle
Operates on the same electro-hydraulic servo principle as standard actuators but utilizes larger internal passages and a higher-force piston assembly. The enhanced servo valve provides greater flow capacity, enabling faster actuator movement and higher dynamic stiffness.
Installation Requirements
- Ensure the hydraulic power unit can supply the required flow rate for the larger actuator.
- Verify mechanical linkage alignment to prevent binding under high force.
- Use high-pressure rated fittings and tubing for hydraulic connections.
Usage Precautions
- Monitor hydraulic oil cleanliness closely, as high-pressure actuators are sensitive to contamination.
- Do not apply excessive side loads to the actuator rod.
- Perform regular stroke and response time tests during scheduled maintenance.
