Woodward TG-10E, Installation And Operation Manual

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Manual 04045 TG-10E/-13E/-17E Actuator
Woodward 1
Chapter 1.
General Information
Introduction
This manual 04045 provides general information, installation, operation,
principles of operation, and troubleshooting for the Woodward TG-10E,
TG-13E, and TG-17E Actuators.
All actuators have the same mounting pad, drive shaft configuration, and terminal
shafts.
Rated work capacity is 10 lb-ft (14 N
x
m) for the TG-10E and 13 lb-ft (18 N
x
m) for
the TG-13E, both with 150 psi (1034 kPa) internal operating oil pressure. The
TG-17E offers 18 lb-ft (24 N
x
m) rated work capacity with higher 200 psi (1379
kPa) oil operating pressure.
Maximum terminal shaft travel for the TG-10E is 30 degrees, and 40 degrees for
the TG-13E/-17E. Recommended travel from “NO LOAD” to “FULL LOAD” is 2/3
of maximum terminal shaft travel, or 20 degrees for the TG-10E, and 30 degrees
for the TG-13E/-17E. (See Figure 3-1, Recommended Terminal Shaft Travel.)
The internal pump is sized to operate over standard speed ranges: 1100 to 2400
rpm; 2400 to 4000 rpm; 4000 to 6000 rpm. The actuator is built for the speed
range specified by the customer. The high-speed actuator (4000 to 6000 rpm)
may require a heat exchanger in some applications. (See Chapter 3, When is a
Heat Exchanger Necessary?)
All other operating features and specifications of the TG actuators are the same
for each model.
Description
The TG actuator is a self-contained, proportional, electrohydraulic actuator used
for the positioning of valves. It can be used with all available Woodward
integrating electronic controls and accessories.
The TG proportional electrohydraulic actuator is a transducer which converts a
given electrical signal to a corresponding proportional angular output shaft
position to control the flow of steam or energy medium to the turbine. The
actuator is controlled by an external signal from an integrating amplifier. The
control signal must be unidirectional dc, thereby proportionally increasing the
mechanical output position. The exact control used depends upon the operating
scheme of the installation. Control assemblies are available to control speed,
frequency, load, pressure, and other variables.
Optional Actuators
A TG actuator is available which does not require a drive from the turbine (Figure
3-4). It uses an external, customer-supplied, hydraulic source and can be located
in a convenient location to operate the steam valve linkage.