Description
Woodward UG-8L8520-0052
Technical Specifications
- Base Model: UG-8L
- Part Number: 8520-0052
- Control Type: Mechanical-Hydraulic
- Power Source: Engine-driven mechanical flyweights with internal hydraulic servo
Functional Features
- Stable Speed Regulation: Provides precise isochronous or droop speed control depending on configuration.
- Hydraulic Amplification: Converts small mechanical flyweight movements into high-force hydraulic actuator movements to drive fuel racks.
- Self-Contained: Features an independent oil system, eliminating the need for external control oil supplies.
Application Scenarios
Widely deployed in medium to large diesel generator sets, marine propulsion engines, and industrial mechanical drives requiring robust and reliable speed control.
Performance Parameters
- Speed Regulation: Excellent steady-state and transient speed response.
- Actuator Force: High hydraulic output force capable of moving large fuel racks smoothly.
Material Composition
Constructed with heavy-duty industrial-grade metallurgy, precision-machined steel components, and high-integrity elastomeric seals to ensure leak-free, long-term operation in harsh environments.
Structural Characteristics
- Integrated Servo: Built-in hydraulic servo piston for direct fuel rack actuation.
- Adjustment Knobs: External mechanical adjustments for speed setting and droop calibration.
Working Principle
Centrifugal flyweights sense engine speed and modulate an internal hydraulic pilot valve. Pressurized oil is directed to a servo piston that moves the fuel rack, maintaining the desired speed setpoint with stable control characteristics.
Installation Requirements
Mount securely to the engine with proper alignment to the fuel rack linkage. Ensure adequate clearance for maintenance and linkage travel.
Precautions for Use
Regularly check and maintain hydraulic oil level and quality. Inspect mechanical linkages for wear and ensure all pivot points are properly lubricated.
