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Journal Bearing Friction Apparatus Unit
Description & Technical Specification
Journal Bearing Friction Apparatus Unit
Technical description of Journal Bearing Friction Apparatus Unit
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 temperature of the lubricant, is indicated digitally on the control unit.
Specification of Journal Bearing Friction Apparatus Unit
- Unit to investigate basic tribological topics
- Radial journal bearing with stainless steel shaft journal and free-moving bronze bearing shells
- Three-phase ac motor with frequency converter for speed control
- Load applied to journal bearing using a mechanical lever, transmission ratio 5:1
- Measurement of friction moment acheived through the use of a lever with sliding weight
- Balance weight to compensate for the intrinsic weight of the measuring set-up
- Drip-feed lubrication for continuous lubricant supply (drip-feed lubricator)
- Drip tray for leakage oil
- Inductive speed sensor
- Thermocouple for oil temperature measurement
- Control housing with digital displays for oil temperature and speed, also allows speed to be varied
Technical data of Journal Bearing Friction Apparatus Unit
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 of Journal Bearing Friction Apparatus Unit
- L x w x h: 600x440x360mm (experimental unit)
- L x w x h: 360x310x160mm (control unit)
- Weight: approx. 40kg
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