Driveline Thermal & Lubrication

Closed (enclosed) gear drive: power losses — mesh, bearing & churning — steady-state sump temperature, and the EHL film ratio λ for scuffing / lubrication-regime assessment.

Input Parameters

Gear type

Input power P

Pinion speed n₁

rpm

Speed ratio i = z₂/z₁

—

Bearing loss factor

Oil viscosity ν₄₀

cSt

Oil density ρ

kg/m³

Pinion pitch dia d₁

Face width b

Combined roughness Rq

µm

Pressure-viscosity α

1/Pa

Pressure angle φ

Ambient T_amb

°C

Gearbox surface area

m²

Heat-transfer coeff h

W/m²K

Allowable oil temp

°C

Driveline Thermal & Lubrication

Input Parameters

Results

Schematic