WOODWARD TG Turbine Governors

WOODWARD TG Turbine Governors

Product Overview and Working Principle

Core function: By real-time monitoring of turbine speed and adjusting fuel/steam input, maintain equipment operation within the set speed range, ensure system stability, and prevent overspeed or speed fluctuations.

Working principle: Utilizing centrifugal force or electronic sensors to sense changes in rotational speed, driving actuators through mechanical or electro-hydraulic mechanisms, adjusting valve opening, and achieving closed-loop control.

Main models and features

1. TG13 series

Application scenario: Suitable for medium and low-speed turbine systems, supporting ATEX certification, and adaptable to hazardous environments.

Model features:

TG13 Screw (screw type):

Speed range: 2400 rpm, 4000 rpm, 6000 rpm, rotation direction divided into CW (clockwise) and CCW (counterclockwise).

The rated speed droop (Droop) can be adjusted, for example, at @ 2 ° Droop, the rated speed is 1950 rpm or 2010 rpm (part numbers: 9904-814 to 9904-828).

TG13 Lever:

The structure is more suitable for space constrained scenarios, with other parameters similar to screw types (such as part numbers 9904-817, 9904-819, etc.).

2. TG17 series

Performance Upgrade: Suitable for higher torque demands, with a speed range that overlaps with TG13, but with stronger adjustment accuracy and stability.

Model example:

TG17 Screw: 2400 rpm, 4000 rpm, 6000 rpm specifications, supporting ATEX certification, part numbers such as 9904-800 (2400 rpm, CCW, @ 2 ° Droop=1950 rpm), 9904-803 (4000 rpm, CCW, @ 2 ° Droop=4035 rpm), etc.

TG17 Lever: such as 9904-808 (2400 rpm, CCW, @ 2 ° Droop=2010 rpm), supports different droop characteristic configurations.

3. TG611 series

Upgrade and Conversion: TG to TG611 Conversion Kit (Part Number: 8516-174), compatible with old system upgrades; The TG611-13/17 model supports overspeed trip device (OTD) and enhances safety protection (part numbers: 8516-175 to 8516-191).

Core parameters and configuration

Speed range: covering 2400 rpm to 6000 rpm, customizable according to turbine model.

Rotation direction: CW (clockwise) or CCW (counterclockwise), which should match the rotation direction of the turbine shaft.

Droop characteristic: Typical value of 2%, adjustable, used for load distribution when multiple machines are connected in parallel.

Certification and environmental adaptability: Supports ATEX certification, suitable for Zone 2 hazardous areas, some models are vibration resistant and high temperature resistant.

Accessories and System Integration

Actuator matching: can be paired with TGE turbine actuators (such as TGE13, TGE17, part numbers 9904-110 to 9904-115) or VariStroke actuators to form a "governor+actuator" closed-loop control chain.

Monitoring and Communication: Remote monitoring is achieved through the MicroNet system or Flex500 platform, and GAP software programming is supported to adjust control parameters.

Maintenance kit: includes spare parts such as seals, springs, etc. (refer to the spare parts list in the "Electro hydraulic Governor and actuator" section) to ensure long-term reliable operation.

Application scenarios

Industrial power generation: Stable speed control of steam turbine generator units to ensure constant grid frequency.

Mechanical drive: When driving equipment such as compressors and pumps, maintain the speed to match the load demand.

Petroleum and Chemical Industry: Speed regulation of gas turbines in gas pipelines and refining facilities to adapt to harsh working conditions.

Advantages and Characteristics

Reliability: The mechanical structure is mature, and some models support redundant design to reduce the risk of downtime due to failures.

Flexibility: It can adapt to different working conditions by adjusting the sag coefficient and speed setting point, and supports on-site manual or remote electronic adjustment.

Compatibility: Seamless integration with other Woodward control products, such as ProTech overspeed protection devices, to build a complete safety system.