The dangers of turbine oil emulsion

The harm of turbine oil emulsion 2018 - 12 - 27 is the main purpose of turbine oil system to provide steam turbine generator bearing lubricating oil and adjust the pressure oil of security systems. Therefore, turbine oil quality fit and unfit quality directly affects the safety and reliability of the steam turbine. Turbine oil emulsion to the unit, for example, the harm is very big. Mainly manifested in the following respects: ( 1) A liquid only with appropriate adhesive and viscosity at the same time, to as lubricating oil, and lubricating oil on friction surface adhesion must also the friction between the molecules is greater than the lubricating oil itself. In this way, both in mutual sliding friction surface, each drives a attached on the surface of oil film, forming liquid friction between two friction surfaces, the rotor rotates at high speed, at the bottom of the shaft and bush forming high pressure oil film and bearing rotor weight sliding in the bush. If a water-in-oil emulsion, the lubricating oil adhesion is bad, oil on the friction surface adhesion is not enough, the oil film is damaged, the rotor shaft neck may dry friction, and bearing bush bearing damage, strong vibration unit, or the machine. （ 2) In the operation of the steam turbine in lubricating oil need to take away the heat mainly comes from the rotor shaft neck and the heat generated by sliding friction bearing, via high temperature steam turbine moving blade on the rotor parts such as heat conduction on the journal, and feer is due to the rotor current is too large and the magnet generator by the generator rotor transfer heat to the journal. If the turbine oil emulsion, the emulsion deposit on the oil circulation system, the obstruction of oil flow, make the oil supply is insufficient, affect the heat dissipation, temperature can't control the bearing and the journal within the specified value, easy cause bearing tile burning accident. （ 3) Demulsification degree is an important index of the steam turbine. Turbine oil emulsion, will accelerate the oxidation of the turbine oil, make higher acid value, produce more oxidation sediments, so as to prolong the demulsification of steam turbine, i. e. the deteriorated oil demulsification performance. （ 4) Turbine oil emulsion, will make the adjustment, the security system of slide valve components such as rust, caused by unsmooth, reduces the sensitivity of action, serious when, still can cause regulation, security device refused to move. Resulting in speeding the accident unit.