Is the hydraulic brake or the pitching system cause the stop? If I am correct, I thought the hydraulic brake can only be triggered when the shaft is static (possibly because the brake is not designed to be powerful enough and thus could be overheated if the shaft is rotating)?
Usually you are absolutely right. The shaft brake is like a holding brake, designed to hold the drive train or stop it at feathering turning speeds. However at Turbines with a blade tip brake the Rotor will still turn very fast after releasing the Tips. So the brake will serve also as a partial stopping brake. On this Turbine type the Brake will apply immediately after the stop command, simultaneously with the tip brake. Why? I really don't know! Maybe an experienced micon technician will read this and give you an answer. When I am stopping at the top, you can smell the worn brake particles very intense in the air... I am holding my breath every time and catch some fresh air from the front😄
@@saasch_baasch I've heard several reports saying the hydraulic brakes cause fire in nacelle, so I was wondering if there is some way to optimize this and thus reduce fire risk.
Гидравлический тормоз должен срабатывать с небольшой задержкой после срабатывания аэродинамического торможения, но на разных моделях по разному... Также есть защита от пожара, т.е. тормоз отключается при перегреве, либо если вал не остановился спустя заданное время.
Hey, there are indeed some possible and common Damages due to that. At first there are Damages caused by direct or indirect lighting strikes. This reaches from primary Damages through high currents or arcs (there are even special parts that are designed to cause arcs and to withstand them) like earthing conductors even if not very common... To secondary Damages through induced Currents in microelectronics. Secondly there are Damages through corrosion, Caused weather by high moisture or in a salty(water) condition. Thirdly there are also Damages by the natural frequency of the Turbine cause by Wind. Those Damages are occurring on Parts that are not properly fixed/mounted. These oscillations may cause unique damages like cut through power cables or steel parts just by absolutely minor friction or fallen over massive control cabinets due to fatigue failure of Bottom joints. The fatigue Topic itself is by the way something that is in this in this extreme intensity unique to Windturbines due to cycles far over 100M in 20 years...
Ah, I forgot something.. you mentioned Temperature: as far as I know there are no dedicated damages to Temperature, except the normal shortened theoretical lifetime of electrical pars under permanent high temperatures. But there might be a "derating" on hot conditions, this means if there are high temperatures and high wind speed (here not very common) then the maximum power is dynamically limited according to maximum allowed Temperature of specific parts (Oil, Generator, etc..). Snow and ice is a minor problem to the Nacelle itself, but may cause damages to the wind sensors if fallen from the upper tip of a blade (also not very common). Rain is usually absolutely no Problem, but I know cases where there was a lack of sealing in the roof that caused damages to electrical equipment.. Hope I got all 😊
@@saasch_baasch is it common to replace parts that have been damaged by a lightning strikes emp / induction even though the part has not been directly hit? Thank you so much for the in depth reply 😁😁😁
@@eventhorizon7374 if parts are damaged that are not mentioned to withstand the effects of a lighting strike, then they are very quickly raplaced. Damaged electrical equipment is often vital for the production itself or at least for the Savety system and thus to the Operation itself. Sensors for example are very common to be harmed by the mentioned effects. But you asked for another thing... there are Parts that are ment to be "worn" by Lightning or caused Arcs that are being replaced or realigned regularly, even of not damaged. These Parts du have different shapes and realizations but fulfill always the same function: Guide the Lightning Energy from the Blade root directly to the Nacelle, doing a bypass to the Rotor bearing, which must not be harmed through high currents. I will do a video with Damages through Lightnings in the next year 😊
The Greasing is done by a stationary Lincoln full automatic greaser with a reserve of up to 1 year, but it is not monitored and if there is an error shortly after service, then the Bearings will have a bad year.😄
Krass wie die schwingt.
This main shaft should have gaurds installed to allow you carry out the service safety.
Overrated.... 🤕
Nice
Is the hydraulic brake or the pitching system cause the stop? If I am correct, I thought the hydraulic brake can only be triggered when the shaft is static (possibly because the brake is not designed to be powerful enough and thus could be overheated if the shaft is rotating)?
Usually you are absolutely right. The shaft brake is like a holding brake, designed to hold the drive train or stop it at feathering turning speeds. However at Turbines with a blade tip brake the Rotor will still turn very fast after releasing the Tips. So the brake will serve also as a partial stopping brake. On this Turbine type the Brake will apply immediately after the stop command, simultaneously with the tip brake.
Why? I really don't know! Maybe an experienced micon technician will read this and give you an answer.
When I am stopping at the top, you can smell the worn brake particles very intense in the air... I am holding my breath every time and catch some fresh air from the front😄
@@saasch_baasch I've heard several reports saying the hydraulic brakes cause fire in nacelle, so I was wondering if there is some way to optimize this and thus reduce fire risk.
Гидравлический тормоз должен срабатывать с небольшой задержкой после срабатывания аэродинамического торможения, но на разных моделях по разному... Также есть защита от пожара, т.е. тормоз отключается при перегреве, либо если вал не остановился спустя заданное время.
Ich dachte schon das auf den NM60 wenig Elektronik ist. Aber das toppt ja alles haha
Ja, extrem übersichtlich😄 hier kann jeder mal Hand anlegen wenn was nicht passen sollte.
@@saasch_baasch ja ab den NM72 bzw 82 wird es da schon schwerer
@@wvidz1174 ja, speziell die 82 ist eine ganz besondere Anlage🙈
👍
Krass
ui, und ich dachte NM1000 ist schon hart im stop xd
Merry Christmas to everyone, are there any failures/damages inside the nacelle caused by atmospheric conditions/temperature?
Hey, there are indeed some possible and common Damages due to that. At first there are Damages caused by direct or indirect lighting strikes. This reaches from primary Damages through high currents or arcs (there are even special parts that are designed to cause arcs and to withstand them) like earthing conductors even if not very common... To secondary Damages through induced Currents in microelectronics.
Secondly there are Damages through corrosion, Caused weather by high moisture or in a salty(water) condition.
Thirdly there are also Damages by the natural frequency of the Turbine cause by Wind. Those Damages are occurring on Parts that are not properly fixed/mounted. These oscillations may cause unique damages like cut through power cables or steel parts just by absolutely minor friction or fallen over massive control cabinets due to fatigue failure of Bottom joints.
The fatigue Topic itself is by the way something that is in this in this extreme intensity unique to Windturbines due to cycles far over 100M in 20 years...
Ah, I forgot something.. you mentioned Temperature: as far as I know there are no dedicated damages to Temperature, except the normal shortened theoretical lifetime of electrical pars under permanent high temperatures. But there might be a "derating" on hot conditions, this means if there are high temperatures and high wind speed (here not very common) then the maximum power is dynamically limited according to maximum allowed Temperature of specific parts (Oil, Generator, etc..).
Snow and ice is a minor problem to the Nacelle itself, but may cause damages to the wind sensors if fallen from the upper tip of a blade (also not very common).
Rain is usually absolutely no Problem, but I know cases where there was a lack of sealing in the roof that caused damages to electrical equipment..
Hope I got all 😊
@@saasch_baasch is it common to replace parts that have been damaged by a lightning strikes emp / induction even though the part has not been directly hit?
Thank you so much for the in depth reply 😁😁😁
@@eventhorizon7374 if parts are damaged that are not mentioned to withstand the effects of a lighting strike, then they are very quickly raplaced. Damaged electrical equipment is often vital for the production itself or at least for the Savety system and thus to the Operation itself. Sensors for example are very common to be harmed by the mentioned effects.
But you asked for another thing... there are Parts that are ment to be "worn" by Lightning or caused Arcs that are being replaced or realigned regularly, even of not damaged. These Parts du have different shapes and realizations but fulfill always the same function: Guide the Lightning Energy from the Blade root directly to the Nacelle, doing a bypass to the Rotor bearing, which must not be harmed through high currents.
I will do a video with Damages through Lightnings in the next year 😊
@@saasch_baasch Are nacelles covered with protection in such a way to create a faraday cage or is that design rare?
Looks like mint condition to me
That is one old turbine 0:31
Jesus these are old. Run her up to 1400 rpm and try it. See can you get the brake pads to fly off 😂
Always keep a distance to the high speed shaft during testrun they said to me🧨
How do you manage when greasing the main bearings ? I used dewatt greaser with extension.
The Greasing is done by a stationary Lincoln full automatic greaser with a reserve of up to 1 year, but it is not monitored and if there is an error shortly after service, then the Bearings will have a bad year.😄