Model Interpretation

8516: Part number code of TG-13 mechanical hydraulic governor platform;

038: Fixed specification variant, clockwise input drive shaft, 1200–2400rpm screw speed setting range, rated droop reference 2010rpm, 16N·m(12ft-lb) counter-clockwise output torque, independent built-in oil reservoir configuration.

Technical Specifications

Mechanical & Electrical Parameters

Input Drive Shaft Rotation: Clockwise(CW); Output Shaft Rotation: Counter-clockwise(CCW)

Rated Output Torque:16N·m(12ft-lb); Adjustable Speed Range:1200～2400RPM, nominal droop setting benchmark 2010RPM

Ambient Working Temp:-30℃～+75℃; Full sealed weatherproof housing, IP54 outer casing

Overall Dimension: approx 202×155×102mm, net weight≈3.2kg, flange surface mounting

Certifications: ATEX explosive-proof, HAZLOC hazardous location certification, NEMA A industry specification compliance

Internal Hydraulic Structure

Self-contained integral sump with built-in gear oil pump driven by input shaft; centrifugal flyweight speed detection unit integrated inside governor body; mechanical speed droop adjustable via top hand screw without extra auxiliary oil source.

Interface and Communication Configuration

Mechanical Interface: Input spline shaft connected with prime mover rotating gear; output drive shaft directly coupled to turbine steam governing valve/fuel control rack; top hand-adjustment screw for manual speed setpoint trimming.

No native digital bus; optional external 4–20mA electric actuator kit for remote analog speed set control, compatible with upper DCS analog output signal.

Core Function

Speed Droop Governing: Standard proportional droop regulation, automatically reduce speed with load rising, stable multi-unit parallel load sharing for island grid genset system.

Full mechanical closed-loop speed control: Centrifugal flyweight senses real-time shaft speed, internal hydraulic servo amplifies displacement to adjust governing valve opening, stable transient & steady-state speed under variable load fluctuation.

Manual local speed trimming: Top screw manually fine-tune rated operating speed within full 1200–2400rpm range, no auxiliary power needed during on-site commissioning.

Passive over-speed protection matching: Cooperates with external mechanical trip bolt for turbine over-speed shut-down logic, widely used for non-isochronous constant-speed working condition.

Applicable Scenarios

Small industrial back-pressure steam turbine set, waste heat turbine generator unit, chemical plant compressor prime mover, biogas/diesel genset mechanical governing system, offshore auxiliary turbine, process pump driving turbine in hazardous ATEX workshop.

Operation and Maintenance Instructions

Install horizontally, avoid long-term vibration & high-temperature radiation near boiler flue; fill specified Woodward anti-wear hydraulic oil into independent sump before startup, regularly check oil level mark.

Periodically inspect input/output shaft coupling for looseness, avoid eccentric wear causing speed hunting and unstable governing action.

Spare replacement must adopt original 8516-038; re-calibrate hand screw setpoint after installation, run no-load speed test before on-load commissioning.

Abnormal speed fluctuation: First check internal oil contamination or insufficient sump oil volume; clean internal filter and replace hydraulic oil if oil emulsification appears.