1. Pump Activation:
- When the turbine is shut down or operating at low speeds, the jacking oil pump is activated.
2. Oil Supply:
- The pump draws oil from a dedicated jacking oil reservoir or a separate section within the main oil system.
3. Pressurized Oil Flow:
- The jacking oil pump pressurizes the oil and delivers it to the jacking oil system.
4. Piping and Distribution:
- The pressurized oil flows through pipes and channels within the turbine housing.
5. Jacking Oil Distributors:
- The oil is distributed to strategic points around the turbine rotor. These points are often located near the main bearings and other critical areas.
6. Lubrication and Cooling:
- As the pressurized oil flows through the distribution system, it provides lubrication to the turbine bearings and other components. Additionally, it helps cool these components by dissipating heat generated during rotation.
7. Rotor Engagement:
- The pressurized oil exerts force on the jacking pads or shoes, which are in contact with the turbine rotor. This force helps rotate the rotor slowly.
8. Speed Control:
- The speed of rotation is precisely controlled by regulating the flow rate and pressure of the jacking oil. This is typically achieved through hydraulic control systems.
9. Monitoring:
- The jacking oil pump system includes sensors and instruments that monitor oil pressure, flow rate, and temperature. This monitoring ensures the system is operating within safe and optimal parameters.
By rotating the turbine rotor at a slow speed, the jacking oil pump helps maintain the integrity and longevity of the turbine's bearings and other critical components during periods of low speed operation or shutdown.
