Annular gap flow test rig

Description

  • Investigation of annular seals as well as media-lubricated journal bearings by using active magnetic bearings (AMB)
  • Suitable for rotordynamic characterisation by inherent force and displacement measurement
  • closed circuit to avoid cavitation

Investigation methods

static tests

determination of load capacity of media-lubricated journal bearings with and without an axial flow component

dynamic characterisation

complete rotordynamic characterisation of annular seals and journal bearings

Technology

gap geometry

  • annulus clearance h/R: 0.001…0.01
  • annulus length L/R: 0.2…2
  • plain and profiled gaps

operating conditions

  • Reynolds number: ≤6700
  • pressure difference: ≤16 bar
  • leakage: ≤8.3 l/s
  • pre-swirl ratio: 0..1.5 ΩR

excitation

  • eccentricity: 0..0.93
  • precessional frequency: 0..2Ω

Technology

gap geometry

  • annulus clearance h/R: 0.001…0.01
  • annulus length L/R: 0.2…2
  • plain and profiled gaps

operating conditions

  • Reynolds number: ≤1000
  • pressure difference: ≤5 bar
  • leakage: ≤0.5 l/s
  • pre-swirl ratio: 0..1.5 ΩR

excitation

  • eccentricity: 0..0.93
  • precessional frequency: 0..2Ω