How does Turbo labyrinth seal work?
Function of Labyrinth Seals in Turbocharger The bearings are separated from the blower and turbine by labyrinth seals. These seals are sealed by air supply from the discharge of blower to prevent oil entering the blower and to prevent contamination of the oil by the exhaust gas.
How do honeycomb seals work?
Sealing Without Gas Swirl Honeycomb seals are machined with individual chambers that create the pressure drop needed to slow leakage. Those chambers also disrupt circumferential flow around the shaft, preventing destabilizing forces caused by the gas swirl that is common with labyrinth seals.
What are labyrinth seals made from?
Labyrinth seals are used for many low-pressure air compressors, especially when robustness is more important than low leakage. They are normally made of metal, mainly aluminum, but thermoplastics can be used for higher corrosion resistance or better rubbing behavior.
Where in a gas turbine is honeycomb material used and why?
In the gas-turbine industry, honeycomb is used primarily in shaft-type labyrinth seals and rotating (rotor) blade shroud seals.
Which type of lubricant increases the effectiveness of a labyrinth seal?
GreaseMax lubricators offer a much improved outcome for labyrinth seal greasing and have proven results in this application.
How does a carbon seal work?
A Sea-Doo carbon ring (known as a carbon seal as well) is a part of a seal that is designed to keep the water outside the hull. This small ring with the rubber boot and the metal support ring all encase the driveshaft to give it a waterproof seal. As the carbon ring can wear out, it needs to be periodically replaced.
How do non-contact seals work?
Non-contact seals are designed to seal without any physical contact between the rotating and stationary elements….Non-Contact Seals
- no parasitic drag.
- no wear on the rotating element.
- long life.
- reduced heat buildup in the sealing cavity.
- extended bearing life.
Why are antioxidant added to hydrocarbon oils?
Antioxidants are additives designed to prolong the life of a lubricant by increasing the oxidative resistance of the base oil. Antioxidants allow lubricants to operate at higher temperatures than would otherwise be possible without them.
How are oil seals lubricated?
Both the shaft and the Oil Seal have to be lubricated with oil or grease in advance. This eases the assembly and ensures lubrication from the beginning. If Oil Seals with fixed dust lips are being used, the space be- tween the sealing lip and the dust lip may also be filled max. 40% with grease.
What is the difference between a contact and non-contact seal?
Like contact seals, non-contact seals typically Buna-N and nitrile rubber parts bonded to a steel insert. The main difference between the two is that non-contact seals are fixed to the outer ring and do not apply pressure to the inner ring of your bearing.
How does a oil seal work?
Oil seals are used to protect shafts and bearings from ingress of dirt and foreign matter and egress of oil or grease. An oil seal generally consists of an outer circular metal part and an inner flexible member that does the actual sealing and is bonded to the metal part by chemical adhesive agents.
What makes labyrinth seals unique?
This unique design keeps contaminants out and ensures the inner and outer rings of the seal stay inseparable. Production process for a Labyrinth Seal: The steel inner ring is surrounded by molded aluminum.
Where do labyrinth seals go on a rotating shaft?
For labyrinth seals on a rotating shaft, a very small clearance must exist between the tips of the labyrinth threads and the running surface. The “teeth” of the labyrinth seal may be on the rotating shaft (Teeth On Rotor – TOR) or on the stator (TOS), or both, in an interlocking configuration.
What is a labyrinth seal on a gas turbine?
This acts to prevent its escape, and also acts to repel any other fluid. Because these labyrinth seals are non-contact, they do not wear out. Many gas turbine engines, having high rotational speeds, use labyrinth seals due to their lack of friction and long life.
How does a labyrinth work?
The labyrinth takes the form of multiple interlocking “fingers” on the two sides moving relative to each other. On devices where the rate of environmental change (pressure, temperature, humidity) needs to be controlled, but cannot be completely sealed.