What is control oil in turbine?

Control oil passes direct to the turbine controls, without cooling. During starting and stopping operatons, an auxiliary oil pump, driven by a very small turbine or electric motor, lubricates the turbine. This unit also serves as a stand-by pump during normal working.

What is turbine control system?

Steam turbine control systems are being designed with today’s technology to operate a turbine in a safe and reliable manner. Many benefits may be realized by choosing the proper steam turbine control system, whether it is a mechanical, an electrical or a programmable controller system.

What is the function of turbine control valve?

Overview. Steam Turbine Governing is the procedure of monitoring and controlling the flow rate of steam into the turbine with the objective of maintaining its speed of rotation as constant. The flow rate of steam is monitored and controlled by interposing valves between the boiler and the turbine.

What type of oil is used for turbine steam control valves?

Turbine lubricating oil has been used for many years as the hydraulic fluid for governor steam valve actuation. Lub- ricating oil is readily available and does not require a sep- arate pumping system nor a separate purifying system, when used as a control fluid.

What is function of accumulator in turbine lube control oil system?

Accumulators act as a safeguard against such failures by providing a temporary supply of lube oil in the event of flow disruptions, thereby preventing a pressure drop during a power outage or a switchover between oil pumps. Accumulators also help maintain a constant oil pressure during temporary changes in demand.

Which valves control oil pressure?

Solenoid valves are used for pilot oil pressure control and change of flow in automotive automatic transmissions.

How do you control wind turbines?

You can use different control methods to either optimize or limit power output. You can control a turbine by controlling the generator speed, blade angle adjustment, and rotation of the entire wind turbine. Blade angle adjustment and turbine rotation are also known as pitch and yaw control, respectively.

Where is nozzle control governing is used?

Nozzle control governing of steam turbine is basically used for part load condition. Some set of nozzles are grouped together (may be two, three or more groups) and each group of the nozzle is supplied steam controlled by valves. Every valve is closed by the corresponding set of nozzle.

Can steam turbine operate without lubrication?

Steam turbines cannot operate without lubrication. Therefore, turbine lubricating oil systems must be designed, operated and maintained for extreme reliability. Lubricating oil systems affect overall facility loss prevention more than most mechanical systems.

Why lubrication is necessary for turbine?

Turbine lubricants must control the rust and corrosion that could destroy precision surfaces, resist foaming and air entrainment, which could impair lubrication and lead to equipment breakdown, and have high viscosity indexes that allow more uniform lubricating performance over a wide range of ambient and operating …

What is the use of control oil in steam turbine?

In all the steam turbines we have a governing system which serves the purpose of steam turbine speed control. Governing system is mainly combination of part which are operated hydraulically. So control oil is the oil which is used to make these hydraulic part function

What causes loss of control oil pressure in a turbine?

Loss of control oil pressure may also result from a failure or rupture of piping, joints, etc., in a high-pressure control oil system. With a turbine running normally and oil supplied by a shaft-driven centrifugal oil pump, the turbine will trip through an interlock in the case of a major fault in the control oil system.

How does a turbine control the speed of the engine?

Once the turbine is running, the control oil to the throttle valve spindle is controlled by the governor, which allows more or less oil to the throttle spindle and thereby regulates the speed. There are many control oil circuits on the web which you can look at to choose which relates to your system.

What is the purpose of the throttle valve on a turbine?

To act as the shutdown and speed control mechanism. The turbine will not start unless the control oil pressure has been substantiated, and as most interlocks or shutdowns use it to dump the oil pressure and thence shut the throttle valve, it’s a very important part of the system.