depiction of radial pressure distribution in a journal bearing at different bearing gap widths

Description:

• The field of tribology covers all forms of friction.
• Dry, mixed and fluid friction all occur in journal bearings.
• Under operating conditions there is completely distinct fluid friction, so that the shaft and bearing shell are separated by a supporting lubricating film.
• The supporting function of the lubricating film can be described by the pressure distribution in the bearing gap.
• The experimental unit TM 260.06is used to visualise the radial pressure profile in the journal bearing with hydrodynamic lubrication.
• To this end, the experimental unit contains an open bearing shell which only encloses a shaft half way and which simulates the journal bearing.
• The bearing shell is secured to two spring plates in such a way that it can be moved.
• Unlike real hydrodynamic journal bearings, the gap width can be adjusted via the radially moveable bearing housing by means of the spring plates and a micrometre screw.
• The TM 260drive unit is required in order to conduct experiments.
• The experimental unit is quickly and easily mounted on the frame of the drive unit with quick-action chucks.
• The shaft 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.
• There are 13 measuring points around the circumference of the bearing shell to measure the pressure.
• The pressures are read off from 13 tube manometers using the height of each column of liquid.
• The lubricant is supplied via an oil pan.
• The bearing shell is transparent, allowing close observation of the experiment.

Technical Details:

Specifications:

• demonstration and visualisation of the pressure distribution in a journal bearing with hydrodynamic lubrication
• quick and easy assembly of the experimental unit on the frame of the drive unit
• roller is driven by a clampable coupling between drive unit and gear unit
• bearing housing is completely transparent
• moveable bearing housing, adjustable bearing gap
• 13 radial pressure measuring points on the bearing shell
• radial pressure distribution indicated with 13 tube manometers
• TM 260 base module required for operation

Technical Data:

• Shaft:
  • diameter: 50mm
  • length: 50mm
  • material: stainless steel
• Bearing shell:
  • diameter: 52,5mm
  • bearing gap adjustable from: 0…2,5mm
• Adjustment mechanism for bearing shell:
  • graduation: 0,01mm
• Oil:
  • ISOviscosity grade: VG 32
  • Measuring ranges:
    • pressure: 360mm oil column
    • speed: 0…200min^-1

Dimensions & Weight:

• L x W x H: 350x150x450mm
• Weight: approx. 4kg

Learning Objectives/Experiments:

• together with the drive unit:
• pressure distribution in the journal bearing depending on speed
• pressure distribution in the journal bearing depending on load or bearing gap width
• stability limit as a function of the gap width

Scope of Delivery:

• 1 experimental unit
• 1 oil (0,5L)
• 1 set of instructional material

Features:

• depiction of radial pressure distribution in a journal bearing at different bearing gap widths
• bearing housing made of transparent plastic

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.