Two range gearbox for SRPM motor.

Two range gearbox for SRPM motor.

Reducer for SRPM transmission

The two range gearbox for SRPM transmission is a 100% CFD development based on our history as a gearbox manufacturer/designer.

Presentation

The technology of permanent magnet traction motors has developed strongly in recent years with the arrival on the market of industrial solutions for severe applications from many manufacturers. These new traction motors offer power performance equivalent to traditional solutions but in a very small footprint. These solutions are therefore very efficient in terms of power density but are limited in terms of torque by the associated power conversion systems. To overcome this, CFD has developed a gearbox that can accommodate 1 to 4 traction motors and has a slow range for pulling high loads and a fast range for high-footed travel or with a lower load up to 100 km/h.

Two-range gearbox top view
Two-range gearbox top view

The gearbox is available with a multitude of different ratios in both ranges. Depending on the number of SRPM motors installed, the ratios are adapted to cover all our customers' needs. The internal lubrication system guarantees optimum operation of the bearings and gears. A neutral position allows the load to be towed without driving the traction motors (necessary due to the presence of permanent magnets generating a high voltage at the terminals of the converters when towing)

Internal view of the gearbox

Internal view of the gearbox

Gearbox isometric view

Gearbox isometric view

Application

Heavy locomotives
Working machines.

  • up to 4 SRPM motors
  • Two ranges, reduction from 2.33 to 0.66
  • Neutral position for towing
General information
Type of gearingParallel helical gearing
maximum input speed3200 rpm
Maximum output torque40,000 N.m peak, 20,000 N.m continuous
General data

EQUIPMENT

SPEED SENSORS
option
LUBRICATION
internal pump
The list of equipment is not exhaustive. Other information is available on request
Diagram of the SRPM two-range gearbox
Diagram of the SRPM two-range gearbox
To know more about it

Related machinery

PR21 axle gear unit

Heavy-duty axle-mounted gearbox

The mastery of the design and manufacture of mechanical sub-assemblies guara...

PR21 axle gear unit

CFD PR18 axle gear unit

On-axle gearbox for medium loads

Little brother of the PR21 gear unit, the PR18 gear unitis dedicated to light...

CFD PR18 axle gear unit

Axle gear unit CFD PR23.

Heavy-duty axle-mounted gearbox

The PR23 axle gear unit is dedicated to heavy to very heavy machines (locomot...

Axle gear unit CFD PR23.
Contact us