Gears.

Due to temperature fluctuations between operation and standstill, the air volume in a gear unit changes constantly. Sucked in, moist air significantly reduces the service life of a gear oil. Moisture in the housing also leads to corrosion with particle abrasion and thus to damage to the gear unit.

Good transmission ventilation filters prevent the entry of humidity when the transmission is “breathing”. GIEBEL adsorbers are special gear ventilation filters for water-free ventilation. They are therefore also used with success near the coast, on offshore systems, in tropical regions and underground.

Damage caused by water

Particles and water are the cause of 80% of malfunctions and damage in hydraulic systems, gearboxes and rolling bearings.

Consequences:

  • Hydrolyse – Rapid aging and degradation of additives
  • Promotion of corrosion
  • Worse lubrication

How adsorbers work on gears

The following graphics show in 4 steps, what happens inside a gear without and with an adsorber when the ambient air is enricht with moisture. Just move the handle over the pictures to see the differences.

Left: Gear useing a ventilation filter without desiccant. Ambient air enriched with moisture.
Right: Gear useing an adsorber with desiccant. Ambient air enriched with moisture.

Left: When the transmission cools down, the oil level drops and pressure is equalized by incoming moist air.
Right: When the transmission cools down, the oil level drops and pressure is equalized by incoming air. The adsorber seperates moisture up to 2% rH (10% rH on average).

Left: When the transmission warms up again, the oil level is rising and pressure is equalized by outgoing moist air.
Right: When the transmission warms up again, the oil level is rising and pressure is equalized by outgoing dry air.

Left: When the ambient air is cooling below drew point, condensation takes place within the gear and water flows into the gear.
Right: When the ambient air is cooling below dew point, no condensation takes place within the gear. The transmission stays dry.

Humidity and dew point

Absolute Humidity
Content of water vapor
Relative Humidity
Percentage to maximum humidity

Example
Temperature = 20°C
Air humidity = 80% rH

Water 13.8g/m³
Dew point 16,4°C

Permissible temperature range = 3,6°C

Humidity after adsorber installation
Average 10% rH
Content of water: 1,7 g/m³
Dew point: -12,5°C

Find the right size

Adsorber for drying the supply air

Please click on the air & oil volume below

Adsorbers for the separation of pollutants

Please click on the air & oil volume below

Videos

For privacy reasons YouTube needs your permission to be loaded. For more details, please see our Privacy Policy.
I Accept
For privacy reasons YouTube needs your permission to be loaded. For more details, please see our Privacy Policy.
I Accept

Downloads

Presentation Gears (English)
Presentation Gears (German)

References – Our Adsorbers in action

Sewage Plant

Task: Moving the rotary pool
Operation: continuous, outdoor use

Adsorber: ME-RV 3M

Hydropower Plant

Task: Ventilation of turbines, protection against oil mist
Operation: continuous operation, evaporating oil particles

Adsorber: VG-D 5L

Radio Telescope

Task: Rotate the radio telescope
Operation: Rarely used, outdoor use

Adsorber: VV-RV 3M

Ships

Task: Drive of a ferry
Operation: continuous operation, protection against evaporating oil particles

Adsorber: VG-D 5L

Sugar Factory

Task: e.g. drive of the cossette press
Operation: Continuous use during campaign, high humidity and temperature fluctuation

Adsorber MA-RV 3M

Elevator

Task: Lifting the drill pipe out of the ground
Operation: Continuous operation Offshore

Adsorber: ME-DV 3L

Mining

Task: Drive of the conveyor system
Operation: Continuous operation, very dusty and humid

Adsorber: MA-RV 3M

Wind Turbine Gearbox

Task: Transfer of the energy of the blades to the generator
Operation: Continuous operation, maintenance interval annually

Adsorber: VG-D 5L  (for oil mist) and VG-DV 3L (for humidity)

Weir

Task: Lifting and lowering the weir
Operation: Use very rarely, only temperature fluctuations

Adsorber: VV-DV 2L