fundamentals of hydrodynamic lubrication

Description:

• There are many factors that influence the friction states in a hydrodynamic journal bearing.
• Speed, load and viscosity of the lubricant used are focused on in particular.
• TM 282allows the study of various factors that influence friction.
• The journal bearing comprises an electrically driven shaft journal that rotates in a freely movable bearing housing.
• The movement of the oil in the bearing can be observed.
• The applied load is transmitted to the bearing housing through a load application device and can be varied by means of weights.
• The frictional moment is determined by means of a movable weight that balances the moment on a balance beam.
• The journal is driven by an electric motor at a speed that can be adjusted by a frequency converter.
• The temperature (and therefore the viscosity) of the lubricant is recorded by a temperature sensor in the bearing shell and shown on a screen on the display and control unit.
• The lubricant is supplied via a wick oiler that applies the oil via two grooves in the bearing bush.
• The accumulated leakage oil is collected in a collecting tank.

Technical Details:

Specifications:

• investigation and visualisation of hydrodynamic bearing
• radial journal bearing with stainless steel journal and freely movable bronze bearing shell
• drip lubrication for continuous supply of lubricant (drip oiler)
• journal bearing subjected to load by means of mechanical lever
• variable speed via frequency converter
• frictional moment measured by level with sliding weight
• inductive speed measurement
• thermocouple in the bearing housing to measure the oil temperature
• display and control unit with digital displays for oil temperature and speed

Technical Data:

• Journal bearing:
  • shaft diameter: Ø=30mm
  • bearing width: 45mm
  • friction pair: steel/bronze
• Motor: 0,37kW
• Oil viscosity grade: ISOVG 32
• Weights:
  • 1x 50N, 1x 20N, 2x 10N, 2x 5N, 2x 5N
  • lever transmission ratio: 5:1
• Measuring ranges:
  • temperature: -50…200°C
  • speed: 100…3000min^-1
  • bearing load: max. 525N
  • friction moment: max. 295Nmm
  • 230V, 50Hz, 1 phase
  • 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
  • UL/CSA optional

Dimensions & Weight:

• L x W x H: 610x440x360mm (experimental unit)
• L x W x H: 360x340x160mm (display and control unit)
• Weight: approx. 40kg

Learning Objectives/Experiments:

• develop an understanding of technological relationships of hydrodynamic lubrication by experimentation
• frictional moment in a journal bearing as a function of:
  • speed
  • bearing load
  • lubricant and lubricant temperature

Scope of Delivery:

• 1 experimental unit
• 1 display and control unit
• 1 set of weights
• 1 oil (0,5L)
• 1 set of instructional material

Features:

• friction states under different operating conditions
• electronic speed control and digital display of speed and lubricant temperature

Accessories:

• Optional:
• WP 300.09Laboratory trolley

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