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Based on: Industry Standards and Best Practices

Languages: English

Sample Transcript

There are two main types of lines shaft drives. Cone pulley drives and non-pulley direct drives. In both types, power is transmitted the length of the machine by a line shaft, running parallel to the machine. Cone pulley drive systems, use cone-shaped pulleys and a long flat belt loop to power each section of the machine. In non-pulley direct drive systems, each section of the machine is connected to the line shaft by mechanical means. Including a gear unit driven by the line shaft that transfers power to an in-shaft. The in-shaft is connected to one of the rolls or cans in the section.

Paper Machine Line Shaft Drives

Training Time: 26 minutes

Line shaft technology dates back to the 18th century and was literally the driving force behind the Industrial Revolution of the 19th century. Line shafts are still in use on many older paper and board machines. This course discusses the design and function of common line shafts used in the papermaking industry along with maintenance and safety guidelines.

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Helical gears have greater tooth contact area than spur gears, resulting in better torque transmission

A differential drive acts both as a speed reducer and as a power transmitter, capable of delivering power to each section at the desired speed

In non-pulley direct drive systems, each section of the machine is connected to the line shaft by mechanical means

Learning Objectives

  • List the two most common power sources for line shaft drives on paper and board machines
  • List the drive sections of a typical paper or board machine
  • Define the term "draw"
  • Explain the difference between cone pulley and non-pulley line shaft drive systems
  • Explain the purpose of helper drives
  • List the elements of a typical line shaft drive system maintenance program
  • Identify and describe safety hazards and safety guidelines for paper and board machine line shaft drives
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Paper Machine Line Shaft Drives FAQs

What is a line shaft drive system?
A line shaft system uses one prime mover to power the whole machine instead of a different one for each section

What is draw?
Draw is the speed difference between two adjacent sections of the paper machine

What are the types of line shaft drives?
There are two main types of line shaft drives: cone pulley drives and non-pulley direct drives. In both types, power is transmitted the length of the machine by a line shaft running parallel to the machine.

What is a helper drive?
Helper drives are electric motors installed on some parts of the machine to supply auxiliary driving energy

How are line shaft drives started up?
First, the line shaft drive is accelerated with all the machine sections unclutched or disconnected. Then, one by one, each section is accelerated up to speed by engaging or closing the section clutch.

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