SUPREX extruder gear unit

RENK extruder gear units of the SUPREX type are the most advanced solution in the plastics market today for the variable-speed drive of large, co-rotating twin screw extruders for polyolefin applications.

Used for the first time in 1999, the SUPREX gear unit’s integrated planetary superimposition drive makes it possible to implement a variable-speed drive system in an energy-efficient, cost-effective, and obsolescence-proof way by means of a large, fixed-speed main engine in combination with a smaller, variable-speed control engine.
The gearbox is available with a torque of up to 500 kNm per output shaft in both a slide as well as a rolling bearing version with a flexible center distance and distinguishes itself due to a very high level of reliability and durability.
The slide bearing design in particular allows for maintenance intervals of > 10 years, thereby achieving the lowest maintenance costs and preventing expensive system downtime.

Features

SUPREX extruder gear unit

Variable speed for maximum product quality in the pelletizing of polyolefines (polyethylene and polypropylene)

2.5 percent better overall efficiency of the SUPREX solution in comparison with conventional, fully speed-controlled main engines and fixed-speed gear units – most economical solution

The most energy-efficient production of plastics thanks to the option of running with a partial load only (e.g. only with the control engine)

Fewer obsolescence problems due to small control engine

Maintenance intervals > 10 years possible with the slide bearing option

Technical data

Output shafts:
Co-rotating
Center distances:
From 205 mm to 349 mm
Torques:
From 100 kNm to 500 kNm per output
shaft Ratios:
From 5 to 14
Input speed:
1,200 / 1,500 or 1,800 rpm.
Gearing design according to DIN/AGMA:
Slide bearing or rolling bearing version available

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