WOODWARD UG25+ Governors for Steam Turbines

WOODWARD UG25+ Governors for Steam Turbines

Product Overview and Features

Core function: By adjusting the steam input to control the speed of the steam turbine, it can operate stably within a set range and is suitable for scenarios such as power generation and mechanical drive.

Working principle: Utilizing centrifugal force or electronic sensors to sense turbine speed, driving steam valves through mechanical or electro-hydraulic mechanisms to achieve closed-loop control.

Model and specifications

Basic model classification

Divided by output torque and configuration:

Standard type:

UG25+Governor (P3, 25 LB FT): Suitable for medium power steam turbines, part numbers such as 8528-122 (CW rotation, left with oil level gauge, no stop button), 8528-123 (CCW rotation, right with oil level gauge, no stop button), etc.

Different driving modes:

Serrated Drive: such as 8528-132 (CCW rotation, with oil level gauge on the left), 8528-133 (CW rotation, with oil level gauge on the right).

Keyed Drive: such as 8528-134 (CW rotation, with oil level gauge on the right), 8528-135 (CW rotation, with oil level gauge on the left).

Core parameters:

Output torque: 25 LB FT (approximately 34 N · m), suitable for small and medium-sized steam turbines.

Speed range: customized according to turbine model, commonly ranging from 3000-6000 rpm.

Structure and working characteristics

Mechanical design:

Adopting a centrifugal flying hammer structure, the centrifugal force of the flying hammer drives the hydraulic servo valve to adjust the opening of the steam valve when the speed changes.

Flexible configuration:

The speed set point and droop coefficient can be manually adjusted to adapt to single machine operation or load distribution with multiple machines in parallel.

compatibility:

Used in conjunction with Woodward UG25+actuators to form a "governor actuator" control chain, part number 8528-027 (actuator, 31 LB FT, key drive).

Application scenarios

Industrial power generation: Speed control of small steam generator units to ensure stable grid frequency.

Mechanical drive: drives equipment such as water pumps and compressors to maintain speed matching load requirements.

Process industry: Power control of steam turbines in chemical and pharmaceutical plants, suitable for frequent start stop conditions.

Accessories and Maintenance

Actuator matching:

UG25+actuators (such as 8528-027 to 8528-327), supporting different torques and installation methods.

Spare parts kit:

Spare parts such as seals, springs, drive shafts, etc., refer to the maintenance list in the Woodward product catalog.

monitoring system:

Can be connected to MicroNet or Flex500 platforms, and remotely monitor the status of the speed controller through GAP software.

Advantages and Characteristics

Reliability: Mature mechanical structure, wear-resistant, suitable for long-term continuous operation.

Cost effectiveness: High cost-effectiveness, suitable for small and medium-sized steam turbines, with low maintenance costs.

Usability: It can be manually adjusted on site without the need for complex programming, making it suitable for simple control systems.