DESCRIPTION

Technical Description

Journal bearings execute a sliding motion between a bearing journal and a bearing shell. This sliding motion is usually lubricated by an intermediate medium. 

Hydrodynamic journal bearings give wear-free continuous duty for large diameters at high rotational speeds, and are suitable for high and shock-type loading. They are usually constructed as split bearings. Frictional heat occurring during operation must be dissipated by the lubricant. 

MT 171 is a horizontally split hydrodynamic pedestal journal bearing. The bearing shells are supported from a face in the spherical bearing housing so as to ensure uniform transfer of any forces that arise to the bottom housing. The journal bearing is lubricated by a loose lubricating ring. Standard commercially available mineral oils can be used. 

An auxiliary shaft is supplied together with the bearing as an aid to assembly and functional testing. 

The practice kit MT 171 forms part of the GUNT assembly, maintenance and repair practice line designed for training at technical colleges and in company training centres. 

A close link between theory and practice is key to the learning content. MT 171 enables a hydrodynamic journal bearing to be assembled and disassembled. Students become familiar with all the components and their modes of operation. The parts are clearly laid out and well protected in a tool box. The accompanying material details the individual steps involved in assembly, and provides additional information on the areas of application, mode of operation and design of the journal bearing.

Learning Objectives / Experiments
- design and function of a hydrodynamic journal bearing
- principles of lubrication and sealing elements
- assembly and disassembly, including for the purposes of maintenance and repair
- reading and understanding engineering drawings and operating instruction