frictional forces between two rolling friction wheels

Description:

• In bearing and drive technology, dynamic friction occurs at the sliding and rolling points, which leads to power losses in the technical systems.
• Dynamic friction is differentiated into sliding, rolling and spinning friction.
• In dynamic friction, there is relative translation between the two bodies.
• Rolling friction occurs when two bodies roll on each other without sliding.
• In rolling friction, the rolling motion is superposed with a smaller sliding friction, known as slip.
• Rolling friction is therefore a combination of rolling and dynamic friction.
• The tribological system in TM 260.01allows a clear representation of the rolling friction and an analysis of the frictional forces.
• The experimental unit comprises two friction wheels, pairing the materials aluminium and rubber at the contact points.
• The slip between the friction wheels is kept constant at 4% by a gear unit.
• The contact force can be adjusted gradually up to a maximum of 80 N by means of a lever.
• The experimental unit includes a tank that supplies lubricant.
• Different lubrication conditions can be studied, such as dry friction, water or oil lubrication.
• The TM 260drive unit is required in order to conduct experiments.
• The experimental unit is mounted quickly and easily on the frame of the drive unit with quick-action chucks.
• The driving wheel is driven by a clampable coupling between drive unit and gear unit.
• The display and control unit of the drive unit shows frictional force and speed and allows the continuous adjustment of the speed.
• The frictional force and the coefficient of friction can be determined in experiments.
• The frictional forces are measured by a force sensor.

Technical Details:

Specifications:

• frictional forces in two rolling friction wheels
• quick and easy assembly of the experimental unit on the frame of the drive unit
• driving wheel is driven by a clampable coupling between drive unit and gear unit
• slip between friction wheels kept constant at 4% by means of gear unit
• load on the friction wheels via lever arm and stepped weights
• friction wheels materials pair: aluminium/rubber
• use of different lubricants
• frictional force measured by force sensor
• displays of force and speed and speed adjustment on the drive unit

Technical Data:

• Load application device:
  • load: 80N
  • lever arm ratio: 2:1
• Friction wheels:
  • Ø=49mm
  • Ø=45mm, incl. rubber ring
• Gear ratio:
  • i: 0,96, slip approx. 23%
• Force sensor for frictional force:
  • 0…50N
• Weights:
  • 1x 5N (hanger)
  • 1x 5N
  • 1x 10N
  • 1x 20N

Dimensions & Weight:

• L x W x H: 480x250x150mm
• Weight: approx. 7kg

Learning Objectives/Experiments:

• together with the drive unit:
• determine the frictional forces as a function of load, lubrication and operating speed
• how slip affects the frictional force
• determine the coefficients of friction

Scope of Delivery:

• 1 experimental unit
• 2 friction wheels
• 1 set of weights
• 1 set of instructional material

Features:

• how slip affects the frictional force
• use of different lubricants possible

Accessories:

• Required:
• TM 260Drive unit for tribological investigations

Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.