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PRODUCT
TM 282 Journal Bearing Friction Apparatus
Education / GUNT Hamburg / Engineering Mechanics and Machine Elements / Fundamentals of Engineering Design /
description

The basic tribological phenomena of journal bearings can be investigated using this unit. The journal bearing to be investigated consists of a stainless steel bearing journal and the free-moving gunmetal bearing housing. A three-phase AC motor with a frequency converter for speed control serves as the drive. A lever with a sliding weight attached to it is connected to the bearing housing. This enables an external moment to be set corresponding to the friction moment generated in the bearing. Another lever, combined with a set of weights, applies the defined load to the bearing. It is possible to view the bearing journal and the lubrication gap through the transparent cover. Lubricant is supplied by a drip-feed lubricator that feeds oil to the shaft via two lubrication channels. A drip tray collects the oil that leaks out. The continuously adjustable speed, as well as the temeperature of the lubricant, is indicated digitally on the control unit.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

 
Learning Objectives / Experiments

- Learning the technological correlations involved in

  hydrodynamic lubrication by experimentation
- Frictional force in a journal bearing dependent on 
  * speed
  * bearing load
  * lubricant and lubricant temperature

Specification

[1] Unit to investigate basic tribological topics
[2] Radial journal bearing with stainless steel shaft journal and free-moving bronze bearing shells 
[3] Three-phase AC motor with frequency converter for speed control
[4] Load applied to journal bearing using a mechanical lever, transmission ratio 5:1
[5] Measurement of friction moment acheived through the use of a lever with sliding weight
[6] Balance weight to compensate for the intrinsic weight of the measuring set-up
[7] Drip-feed lubrication for continuous lubricant supply (drip-feed lubricator) 
[8] Drip tray for leakage oil
[9] Inductive speed sensor
[10] Thermocouple for oil temperature measurement
[11] Control housing with digital displays for oil temperature and speed, also allows speed to be varied

 

Technical Data

Journal bearing
- bearing journal diameter: d=30mm
- bearing width: 45mm
- friction pairing: steel / bronze
- bearing load: max. 525N
- friction moment: max. 295Nmm

Three-phase AC motor

- power output: 0,37kW
Oil viscosity class: ISO VG 100

Measuring ranges
- temperature: -50...200°C
- speed: 0...3000min-1
Weights 
- 1x 50N, 1x 20N, 2x 10N, 2x 5N; 
  1x 25N intrinsic weight of load unit
- 1x 1N sliding weight

 

Dimensions and Weight

l x w x h: 600x440x360mm (experimental unit)
l x w x h: 360x310x160mm (control unit)
Weight: approx. 40kg

Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Scope of Delivery
1 experimental unit
1 set of weights 
1 control unit
1 set of instructional material
Order Details

040.28200  TM 282  Journal Bearing Friction Apparatus