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Typically two balls with springs holding them down, When the turbine spins too fast, the centrifugal force pushes the balls past the resistance of the springs at which point they hit a lever that stops steam/compressed gas flow to the turbine and the turbine shuts down. They are designed to keep the turbine from going so fast that it damages itself or the piece of equipment it is driving.
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What is meant by turbine latching?
CommentsThe protection of a turbine requires a device which ensures the turbine does not automatically restart once a protective trip resets. EG if an overspeed trip occurs you do not want the turbine to resume operation as soon as it slows down below trip speed as it could cycle into overspeed again and continue repeating the cycle. The trip logic therefore includes a lockout which must be manually reset before the turbine valves can be opened again.All sorts of devices are used but most commonly a hydraulic valve which isolates oil from the stop valves. It is separate from the trip solonoid but may be part of the overspeed trip hydraulicsIt was common for the hydraulic valve to have a mechanism referred to as a latch because once it opened it stayed open until the oil pressure was lost again. In electrical terms it is a seal in relayResetting this device is called latching the turbine
What is tripping speed?
in a steam turbine, it is the speed at which the turbine should not go above. some time they call it overspeed trip. because the turbine rotor and berings are not design for such high speed and is not capable to handle this huge cenerfugal forces. usually there is two type of trip system: Electronic and Mechanical. some Steam Turbins have both protaction system.
How over speed protection system works in steam turbine?
by means of mechanical or electrical overspeed protection mechanism
Can you tell how emergency stop valve of turbine operates?
Unless it is an electronic governor on the turbine, there is a mechanical overspeed trip device which closes the trip valve (or trip throttle valve [TTV] on small turbines). This device is a spring loaded weighted pin set into the turbine shaft. At a particular set speed (110% of maximum operating speed, typically) the pin overcomes the force of the spring, flying part way out of the shaft and striking the trip mechanism linkage. This linkage up to that point was holding the trip valve open, now with the release of the linkage the spring on the trip valve instantly closes the valve stopping all flow of steam to the turbine. On electronic governors, when the set point on the turbine speed is reached it opens a solenoid valve (which requires a manual reset) which dumps all hydraulic pressure from the trip valve, allowing it to close.
What is a turbine trip?
A turbine trip is an automatic shutdoen to protect the wquipment from over-speed damage. It is similar to blowing a fuse on an electrical system die to a short circuit. ------------------------------------------------------------------------------------------- Any device which will instantly shut down the turbine. There are high vibration trips, overspeed trips, high bearing temperature trips, low lube oil pressure trips, eccentricity trips, axial position trips, and for generating units: out of phase trips, low voltage trips, high voltage trips, reverse power trips, power to ground trips, and a few others.
How do you overspeed steam turbine?
Run the turbine up to about 75% speed and trip it manually. Reset the trip linkage. Restart the turbine. Adjust the governor up until the overspeed trip mechanism trips the stop valve. Watch the tachometer, the overspeed trip should activate within 10% over the maximum allowable speed of the turbine, if it doesn't trip it manually and repair the trip.
What turbine trip is designed to occur at 10 percent above normal operation?
Overspeed trip.
What is meant by turbine latching?
CommentsThe protection of a turbine requires a device which ensures the turbine does not automatically restart once a protective trip resets. EG if an overspeed trip occurs you do not want the turbine to resume operation as soon as it slows down below trip speed as it could cycle into overspeed again and continue repeating the cycle. The trip logic therefore includes a lockout which must be manually reset before the turbine valves can be opened again.All sorts of devices are used but most commonly a hydraulic valve which isolates oil from the stop valves. It is separate from the trip solonoid but may be part of the overspeed trip hydraulicsIt was common for the hydraulic valve to have a mechanism referred to as a latch because once it opened it stayed open until the oil pressure was lost again. In electrical terms it is a seal in relayResetting this device is called latching the turbine
Why turbocharger overspeed?
Overspeed is usually the result of too small of a turbine housing/wheel used.
What is meant by latch?
CommentsThe protection of a turbine requires a device which ensures the turbine does not automatically restart once a protective trip resets. EG if an overspeed trip occurs you do not want the turbine to resume operation as soon as it slows down below trip speed as it could cycle into overspeed again and continue repeating the cycle. The trip logic therefore includes a lockout which must be manually reset before the turbine valves can be opened again.All sorts of devices are used but most commonly a hydraulic valve which isolates oil from the stop valves. It is separate from the trip solonoid but may be part of the overspeed trip hydraulicsIt was common for the hydraulic valve to have a mechanism referred to as a latch because once it opened it stayed open until the oil pressure was lost again. In electrical terms it is a seal in relayResetting this device is called latching the turbine
What is tripping speed?
in a steam turbine, it is the speed at which the turbine should not go above. some time they call it overspeed trip. because the turbine rotor and berings are not design for such high speed and is not capable to handle this huge cenerfugal forces. usually there is two type of trip system: Electronic and Mechanical. some Steam Turbins have both protaction system.
How over speed protection system works in steam turbine?
by means of mechanical or electrical overspeed protection mechanism
Can you tell how emergency stop valve of turbine operates?
Unless it is an electronic governor on the turbine, there is a mechanical overspeed trip device which closes the trip valve (or trip throttle valve [TTV] on small turbines). This device is a spring loaded weighted pin set into the turbine shaft. At a particular set speed (110% of maximum operating speed, typically) the pin overcomes the force of the spring, flying part way out of the shaft and striking the trip mechanism linkage. This linkage up to that point was holding the trip valve open, now with the release of the linkage the spring on the trip valve instantly closes the valve stopping all flow of steam to the turbine. On electronic governors, when the set point on the turbine speed is reached it opens a solenoid valve (which requires a manual reset) which dumps all hydraulic pressure from the trip valve, allowing it to close.
What is effect on turbine generator if frequency is high or low?
turbine will trip
What turbines meaning?
turbine trip
What is a turbine trip?
A turbine trip is an automatic shutdoen to protect the wquipment from over-speed damage. It is similar to blowing a fuse on an electrical system die to a short circuit. ------------------------------------------------------------------------------------------- Any device which will instantly shut down the turbine. There are high vibration trips, overspeed trips, high bearing temperature trips, low lube oil pressure trips, eccentricity trips, axial position trips, and for generating units: out of phase trips, low voltage trips, high voltage trips, reverse power trips, power to ground trips, and a few others.
What happened in steam turbine if governor failed in open position?
It could overspeed and wreck itself-but there are emergency stop valves as well as the governor, so it is unlikely.
