The thermal power industry is a special industry, and its main oil equipment and characteristics are:

1. Steam turbine

Steam turbine is a type of turbine, an important equipment in the water and steam system of power plants, and the lifeline of power generation. It has the advantages of high single machine power, high efficiency, smooth operation, low manufacturing cost per unit power, and long service life. However, the purchase cost of a steam turbine is high, so its maintenance is crucial, as shutdowns caused by turbine failures can result in significant economic losses. According to a 1991 study by GE, 20% of power plant shutdowns were caused by turbine failures, and 19% of these failures were related to lubrication system issues. For developing countries, if oil maintenance is not taken seriously, it can lead to significant problems. If maintained properly, the service life of a steam turbine is generally 10-20 years.

The lubricating oil used for steam turbines is turbine oil. Turbine oil has three main functions. Firstly, lubrication. Lubricating oil plays an important role in various bearings and turning devices of the turbine generator set, generating an oil film with sufficient load-bearing capacity between the shaft neck and the bearing shell, ensuring that liquid lubrication is formed when the turbine rotor rotates at high speed to ensure the normal operation of the equipment. Secondly, in the process of turbine oil circulation, the heat generated by high-speed operation of bearings can be promptly carried away by the oil to prevent system overheating; The third is the function of speed regulation. In some hydraulic speed regulation systems, turbine oil also participates in the pressure transmission process and plays a role in speed regulation.

Main lubrication parts of steam turbine:

Main bearings, thrust bearings, disc drive devices, top shaft devices, couplings, security components, engine sealing devices.

2Gear transmission device

There are a large number of gear transmission devices for rotating equipment in thermal power plants, which must be under good lubrication conditionsNormal operation.

The equipment with gear transmission devices in thermal power plants mainly includes:

Coal mill, coal feeder, belt conveyor, dump truck, bucket wheel stacker reclaimer, etc

The main use of gear oil is to lubricate the teeth, improve equipment mechanical efficiency, reduce tooth vibration, lower noise, disperse frictional heat, and prevent metal surface corrosion and rust.

3Electro hydraulic control system

The control system and security system of large steam turbines use phosphate ester fire-resistant oil for the fuel supply of the actuator oil motor. According to the working pressure of the speed control system, it is generally divided into medium pressure fire-resistant oil and high-pressure fire-resistant oil. Fire resistant oil has good fire resistance, high resistivity, good oxidation stability, good foam resistance, low corrosion and high cleanliness.