| Customization: | Available |
|---|---|
| After-sales Service: | Provide Installation and Commissioning Guidance. |
| Warranty: | One Year |
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The T812 steam turbine is a multi - stage back - pressure high - temperature and high - pressure steam turbine. The unit is arranged in a single layer, featuring a small volume and convenient installation. This steam turbine adopts multi - valve regulation and forced lubrication, with the rated speed of the main shaft being 3000 revolutions per minute. The rotor is a solid - forged rotor. The cylinder is designed with an inner and outer double - cylinder structure, resulting in high unit efficiency, low equipment operation cost, and remarkable economic benefits. The steam inlet of the steam turbine can be selected from either the left or right side when viewed from the turbine head, and the steam inlet direction is upward. The exhaust port has two configurations: upward and downward. The steam turbine is connected to the generator through a diaphragm coupling, which can effectively reduce the vibration caused by the coaxiality deviation of equipment installation.
Structural Features
Overall dimension drawing
Cross-sectional drawing
Optimized design
Steam Turbine Body
| Item | Unit | Data |
| Product Code | T812 | |
| Rated Speed (Gearbox Reduction) | r/min | 3000 |
| Number of Turbine Stages | 1 regulation stage + 6 pressure stages | |
| Governor Type | DEH Electro-Hydraulic Regulation | |
| Overspeed Protection Method | Two-out-of-three electrical overspeed protection + mechanical overspeed protection | |
| Overspeed Protection Actuation Speed | Rated speed × (1.09 - 1.11) | |
| Overspeed Protection Response Time | s | <0.5 |
| Vibration Value at Rated Speed | mm | ≤0.05 |
| Vibration Value at Critical Speed | mm | ≤0.15 |
| Maximum Axial Displacement | mm | ±0.7 |
| Weight | t | 27 |
| Bearing Lubrication Type | Forced lubrication | |
| Bearing Alarm Temperature | ºC | 85 |
| Turbine Dimensions (Length × Width × Height) | mm | 4400×2400×3300 |
| Turbine Center Height (from Operating Platform) | mm | 1290 |
| Steam Seal Type | Comb-Tooth Labyrinth Seal | |
| Noise Level | dB | ≤85 |
| Unit Continuous Operation Time | hr/year | 8000 |
| Item | Unit | Data | |
| Oil Station | Flow rate | L/min | 500 |
| Oil Pump Configuration | Oil pressure: Adjustable from 0.3 to 1.0 MPa Two AC oil pumps, one DC oil pump |
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| Seal steam heater | Heat Transfer Area | m2 | 20 |
| Cooling Water Flow Rate | t/h | 50 | |
| Cooling Water Pressure | MPa | 0.2~0.4 | |
| Cooling Water Temperature (Normal/Maximum) | ºC | 27/33 | |
Emergency Shut-off Device
The emergency shut-off device is a protective mechanism that prevents the rotor from exceeding the allowable rotational speed, installed on the main oil pump casing connected to the main shaft. The emergency shut-off device used in this unit is a centrifugal flyweight type, which has an eccentric weight mounted radially on the main oil pump casing. At normal rotational speeds, a spring force balances it. When the unit's speed exceeds the rated speed by 9-11%, the flyweight is thrown out, causing the emergency shut-off throttle to disengage and activate.
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