Fm globals generator mockup, simulates oil spray, pool, and pressurized 3dimensional fires typical components of a turbine lube oil fire scenario. Gearbox typical failure modes, detection and mitigation. Bloch, claire soares, in turboexpanders and process applications, 2001. National renewable energy laboratory national wind technology center.
Vented h2 to allow for securing h2 seal oil system 59 58. Included is a shaft having a turbine end and a collector end. We fabricate piping assemblies and spool pieces in our iso 9001 certified, stateoftheart facility in belle vernon, pennsylvania, usa. The fluid being pumped is turbine reduction gear lubricating oil mill17331, 1992, commonly called 2190 tep. To provide dry, superheated steam to the low pressure turbines to reduce moisture erosion and to increase plant efficiency. A common ac motor drives both the jacking oil and turning gear pump. What is the purpose of a seal oil system on a steam turbine. Nov 19, 2016 function of gland steaming in turbine operation. Steam turbinegenerator overhaul and inspection guidelines. O148 milprf7808 three centistoke turbine engine synthetic lubricating oil. Flownex allowed the engineers to an improved understanding of their develop systems and to identify the main contributing factors to these failures, thus preventing numerous future outages due to seal oil repairs, which in turn led to a. Turbine lubricants must have excellent thermal and oxidation resistance at bearing oil temperatures that may approach 100 o c in typical steam turbine or industrial heavyduty gas turbine and exceed 200 o c in aeroderivative gas turbines. We also provide accessory skids for water wash, fire suppression, denox and water injection.
This will cause sluggish operation and, in extreme cases, disasters due to slow operation of the governing valve. Remove the snap ring, and then you can see the chra and compressor housing. O156 milprf23699 five centistoke turbine engine and gearbox oil. It is coupled to the turbine rotor through a gear coupling. How does the steam turbine gland sealing system work. Since the shaft of the turbine are rotating in high speed the. Engineers modelled the hydrogen seal systems and used the simulated results to identify the case of their system trips.
Alternative solution seal oil gas separation and recoveryuse simple process of separating seal oil and entrained gas with the gas routed to recovery andor use. Innovative rotary sealing cartridge systems that offer. Operation of seal oil system the seal oil is kept at a higher pressure than the gas pressure in the generator by specified differential 0. Turbine lube oil system monitoring and control using pic. When the turbine is running at a normal speed of 3000rpm, then the desired quantity of oil to the governing systems and the lubrication systems is supplied by this pump. The lube oil system feeds the jacking oil pump from downstream of the lube oil filter. Lubrication systems are used to remove heat generated in the bearing due to friction while seal systems are used to create a barrier between the. If the turbine does not have a labyrinth seal at the housing end. Combined lube and seal one reservoir one turbine driven main oil pump mop and one motor driven auxiliary oil pump aop duplex coolers and filters. Seal oil system of generator in thermal power plant pump.
Generator seal oil supply system westinghouse electric. To provide turbine generator lubricating oil and autostop oil for the turbine trip system, and 4. Oil can become contaminated by air to form bubbly oil. It is important to avoid oil leaks due to too low p through the oil seals. Vibration data helps to identify a steam turbine seal rub. Turbine lubricants must control the rust and corrosion that could destroy precision surfaces, resist foaming and air entrainment, which could impair lubrication. Wet seal degassing recovery system for centrifugal compressors 2014 2 one partner has reduced methane emissions from centrifugal compressor seal oil degassing by separating gas from seal oil in a small separatordisengagement vessel and routing it back into the compressor suction, to high pressure turbine fuel gas, or to low pressure fuel. Api 614 indicates an iso 32 turbine oil as the lubrication fluid. In accordance with the present invention, a seal oil system is provided for supplying seal oil to the seal plates of a gastight turbine generator both for normal operation and backup operation. Jun 01, 2011 turbine lubricants must have excellent thermal and oxidation resistance at bearing oil temperatures that may approach 100oc in typical steam turbine or industrial heavyduty gas turbine and exceed 200oc in aeroderivative gas turbines. Keep in mind that oilsupply pressure should not be. The jacking oil pump supplies the jacking oil system. Since the hydrogen seal oil system has parallel cartridge filters located downstream of the cuno filter, the cuno filter was returned to service without internal components. Five years ago, san onofre nuclear generating stations unit 3 turbine experienced substantial damage after the supply of oil to its bearings failed.
Nov 15, 1977 in accordance with the present invention, a seal oil system is provided for supplying seal oil to the seal plates of a gastight turbine generator both for normal operation and backup operation. The most common fuels for these machines are natural gas and distillate fuel oil. Seal oil system in large turbo generator sets hydrogen cooling system is introduced for effective cooling of the machine now the problem is to maintain the hydrogen gas parameters inside the generator casing at all regimes hydrogen seals are provided on both the sides to overcome this problem seal oil system basically the function of hydrogen seal oil system is to prevent. Failure mode location different than previous service bulletin corrective action can cause high oil consumption hoc andor low oil pressure lop impacting all re220 apu installations action improved tube design status. Much of the worlds energy is produced by turbines that depend on. This paper will consider the stateoftheart of two general types of seals in a gas turbine. Thus, a liquid fuel system is frequently a part of the installation. Re220gv and gx turbine oil tube leaks issue turbine oil pressure and scavenge tubes leaking.
Act as catalysts that increase the rate of oil oxidation. In many thermal power plants the seal oil system is combined with the lubrication oil system of the turbine. Three oil impellers or pumps are mounted on the turbine shaft. A differential pressure between the seal oil and hydrogen gas must be maintained in order to avoid hydrogen leakage. The fluid is used for main reduction gear lubrication on all steam and gas turbine powered ships, and in some hydraulic systems. Many industrial machines are delivered suitable to burn either gaseous fuel or liquid fuels. Contaminated oil in the lubricating system of an engine can be disastrous to engine operation.
Function and system layout the two functions of the turbine glands and seals are. Centrifugal compressor wet seals seal oil degassing and. For the purpose of this course, the name turbine lubricating oil system has been chosen. Wet seal degassing recovery system for centrifugal compressors. A steam defector is a metal disc attached to the shaft and located between the carbon box and the seal. The conventional lube oil system consists of a reservoir, electric cartridge or steam coil heater, lube oil pumps, one and preferably two switchable lube oil coolers. Centrifugal compressor wet seals seal oil degassing and control.
Oct 21, 2017 in this video we demonstrate turbine lube oil system design,steam turbine lube oil system diagram, turbine lube oil system,steam turbine lube oil system,steam turbine lube oil system diagram,steam. The lubricant oil will form a protective film coating around the shaft only if it is sprayed at a pressure of 1. As in other process plant machinery trains, the quality of the lube oil system which is supplied with the train has a definite impact on the service factor of the unit. Product application bulletin under turbine lube oil. Eng, plant engineer, turbine plant engineer, eskom. Hydrosele total sealing systems for water turbine shafts. The installation of a dry gas purge into a bearing housing seal usually requires some planning, but is not particularly difficult. Auxiliary oil pump can meet the requirements of lubrication system under emergency conditions. Centrifugal compressor wet seals high pressure seal oil circulates between rings around the compressor shaft oil absorbs the gas on the inboard side little gas leaks through the oil seal seal oil degassing typically vents methane to the atmosphere seal oil degassing may vent 40 to 200 scfminute. Gas turbines are normally supplied with a lube oil package mounted in the bedplate of the turbine. Turbine lubricants must control the rust and corrosion that could destroy precision surfaces, resist foaming and air entrainment, which could impair. The oil that flows across the outboard ring mixes with the. The contractor shall furnish a deep well oil lubricated lineshaft vertical turbine pump, manufactured by national. Us20110231111a1 turbinegenerator hydrogen seal oil.
Much of the worlds energy is produced by turbines that depend on this type of lubrication system to keep them. Dec 09, 2015 since the hydrogen seal oil system has parallel cartridge filters located downstream of the cuno filter, the cuno filter was returned to service without internal components. In a recent study, over a 15year period, fm global found that fire protection deficiencies for lubeoil systems were a major factor in 17 large turbine building fires. Alternative solution sealoilgas separation and recoveryuse simple process of separating sealoil and entrained gas with the gas routed to recovery andor use. Gearbox typical failure modes, detection and mitigation methods. A lube oil system will be required unless, of course, the turboexpander is supplied with active magnetic bearings. The differential pressure p across the oil seal is the difference between the pressurized air entering the dry.
If the turbine does not have a labyrinth seal at the housing end, while the turbine is in the shop, the housing end may be bored. A hydrogen cooled generator having a system for diagnosing problems associated with a seal oil system. Now we take apart the bearing system and turbine housing. Lubrication, seal and piping systems for turbomachinery. Blade droop and seal reliability due to manufacturing tolerances and running clearances of machined. The oil that flows across the outboard ring mixes with the bearing lube oil and returns to a lube oil tank.
A pressure limiting valve maintains the pressure in the jacking oil system in accordance with the operating data. The fluid being pumped is turbinereduction gear lubricating oil mill17331, 1992, commonly called 2190 tep. The oil passes through a flow control valve before entering each bearing. Linkediesinger 2010 an airoil separator also called a deaerator figure 9 is a component in a gas turbine lubrication system in which air is removed from scavenged oil before its return to the oil tank. Wet seal degassing recovery system for centrifugal. Pipe plugs were installed in place of the spindles. Oil is not used for sealing purpose in a turbine bearing. Since the shaft of the turbine are rotating in high speed the environment will be high in temperature.
The seal oil system prevents gas from leaking out of the compressor case. In figure 1 the main oil pump is shown on the left, while one governing oil impeller. These systems require auxiliary equipment such as pumps, regulators, filters, and so on for proper operation. Approval issue course 234 turbine and auxiliaries module 10 stressed that these consequences. Linkediesinger 2010 an air oil separator also called a deaerator figure 9 is a component in a gas turbine lubrication system in which air is removed from scavenged oil before its return to the oil tank. This pump is an axial piston type, which is located on the lube oil tank. Improving the reliability of turbine lube oil supply. It drains into the bearing pedestal and flows back to the lube oil. We routinely deliver packaged systems such as gas turbine fuel forwarding manifold assemblies, integrated lube and seal oil systems, dry gas seal and buffer gas seal packages, and steam turbine generator sets. Recovery system that separates gas from the exiting sealoil before routing to the degassing tank recovered gas sent to various outlets.