Woodward TG-10E, -13E, and –17E Actuator 9904-110

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m) for the TG-10E and 13 lb-ft (18 Nm) for

the TG-13E, both with 150 psi (1034 kPa) internal operating oil pressure. The

TG-17E offers 18 lb-ft (24 N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 2-1. 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 2. 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

2-4). It uses an external, customer-supplied, hydraulic source and can be located

in a convenient location to operate the steam valve linkage.

Also available is an electric motor-driven TG actuator (Figure 2-5) which can be

mounted in a convenient location and does not require a mechanical drive from

the turbine or an external oil supply.

A UL Listed TG (Class I, Division 2. Groups B, C, and D), is also available for use

in hazardous areas

Introduction

This chapter describes receiving, storage, and installation requirements for the

TG actuator.

Use care while handling and installing the TG actuator. Be particularly careful to

avoid striking the drive shaft, terminal shafts, or the electrical connector. Abuse

can damage seals, internal parts, and factory adjustments. Do not rest the

actuator on its drive shaft.

Receiving

The TG actuator is shipped from the factory boxed and bolted to a wooden

platform in the vertical position. The oil sight gauges are factory installed on the

sides of the case, and a breather/filler cap is positioned on the cover for vertical

or horizontal actuator mounting and operation.

After factory testing and adjusting, the TG actuator is drained of oil, sealed, and

painted. This leaves a light film of oil covering internal parts to prevent rust.

External shafts are coated with a spray lubricant. No internal cleaning or flushing

is necessary before installation and operation.

Storage

The TG actuator may be stored for short periods of time as received from the

factory. For long-term storage, storage in an environment with large temperature

changes , humid or corrosive atmosphere, etc., or if the actuator is installed on

the turbine for storage, fill the actuator with oil and follow preservation packaging

instructions in Woodward manual 25075. Commercial Preservation Packaging for

Storage of Mechanical-Hydraulic Controls.

If the breather/filler cap has been set for horizontal governor operation and the

actuator is to be stored vertically, replace the cap with a plug before filling it with

oil to prevent oil from draining through the vent hole.

Drive Shaft Rotation

The actuator rotation is single rotation only. When looking at the actuator from

the top, the direction of rotation must be the same as the turbine shaft or the

electric motor driving the oil pump. The arrows on the actuator base indicate the

actual direction of rotation, when viewing in that plane. Use the following

procedure to change the direction of rotation of the oil pump:

1.  Remove the four pump housing screws.

2.  Rotate the pump housing assembly 180 degrees.

3. Align the arrows on the pump housing with the pointer on the actuator case.

The arrows indicate the actual pump drive shaft rotationTGE13. 2400 rpm

9904-110

TGE13. 4000 rpm

9904-111

TGE13. 6000 rpm

9904-112

TGE17. 2400 rpm

9904-113

TGE17. 4000 rpm

9904-114

TGE17. 6000 rpm

*Documentation: Product Spec: 04044. Manual: 04045

9904-115