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Hydraulic Test Rig
The rig comprises a grinding wheel head spindle driven by a motor
and carrying an inertia load made up of detachable steel discs. On
the opposite end of• the shaft to the motor is mounted a radial diffraction
grating and a d.c. tachogenerator (see Fig. 1).
Three motors are currently available, all with there own mounting
brackets for easy changing:
a) Vickers-Sperry, 6 axial pistons motor type MF-3906-30.
b) Boulton Paul; 9 radial pistons with shaped cam track.
c) Hartmann Rol-vane H.T.10 (Telehoist).
Two types of spool valve are available:
a) Dowty Moog, Series 22
b) Pegasus type 120.
A manifold block is available to make the two Moog valves interchangeable.
The Bolton Paul and Telehoist motors both have double ended shaft
so that a tachometer can be mounted direct onto the motor. The tacho
used in a Servo tech. (5 rads/sec./volt). The other tacho (mounted on
the test rig) is an Evershed-Vignoles (7.9 rads/sec./volt). The Evershed
is about 50% less noisy … [cont]. |
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