In rotary equipment, lubrication is one the most important factor. The lube oil system (console) is usually used to cool, lubricate the hydrodynamic bearings of the turbines, generators, pumps, gear boxes and the gear assembly of gear box. It is forced lubrication method. Its main function is to take lube oil from the tank, pump it to high pressure and send to the turbine, generator, pump and gear box. Lubrication reduces the friction during the operation results in higher efficiency, longer maintenance intervals and lower maintenance costs. The lube oil system (console) duty is to provide oil with the specified pressure, temperature, flow and quality to the bearings, gear, etc. In addition to lubrication some equipment’s needs additional requirement of hydrostatic starting aid (jacking oil system).
GPE meets specific requirement of customers for any application by customization and provides technical support for installation, commissioning, overhaul, repair and spares and services.
The return line from the gearbox is connected to the tank. The return oil from the lubricating components have high temperature and may contain some impurities. While oil is settling in the tank, some oil vapor and other gases will be vented by a fan to the atmosphere.
Heater immersed in the Lube oil tank are used to raise the oil temperature to permit pump operation. Once the pump is operating and oil temperature is above 40°C, the heaters are shut off. The heaters can be electrical or steam/hot water coils.
The pump sucks the oil and pushes it to the cooler; if the temperature is high, it enters the cooler; otherwise, the temperature control valve (TCV) operates and bypasses the oil and lets it go to the filter. Pressure control valve (PCV) are the automatic pressure-limiting device. PCV senses the pressure at the lube oil return line and controls that to required set pressure. If the pressure drop of filter exceeds the allowed magnitude, the filter element must be removed, cleaned, or replaced. After the filter, oil goes to the bearings, gearboxes, etc.
Some components may require high-pressure oil for lubrication, in such cases, gear pumps increase the oil pressure before entering the component.
A total package will be supplied as per customer requirement. Jacking Oil System can be mounted on the Main Lube Oil System or can be supplied as separate trolley mounted assembly. Due to Trolley mounting arrangement its is very easy to move the trolley anywhere.
The jack oil pump is used before the startup time; it provides high-pressure oil to elevate the shaft from the bearing surfaces and provide initial lubrication
A Rundown Tank will be supplied as per customer requirement. Rundown Tanks are used to store oil at high level. When the Main Oil tank Oil level lowers below required level, run down tank valve opens and releases the required quantity of oil to make up the required level of oil in the main oil tank. 3. Perfect materials selection considering site conditions, available cooling water quality
Lube oil systems are tested throughout the manufacturing process in order to guarantee a perfect match to their design criteria and to assure long lasting, continuous operation. Intermittent inspection are done to ensure the quality and corrective-preventive actions if anything has gone wrong.
The following tests are typically carried out at on components, subassemblies and final assembly.
