Liquid Controls Avery-Hardoll BM Series, Руководство по обслуживанию и список запасных частей

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TP0003B
BM METER
Chap 2
Page 5
TECHNICAL DESCRIPTION
6.1 The calibrating mechanism comprises a gear train with the ability to transmit rotor movement to a
mechanical register and allow adjustment of the reading. When tested against a reference meter the
adjustment compensates for mechanical losses, wear etc to give the true reading of volume
displaced.
6.2 A gear fitted to the Bulkmeter output shaft meshes with the input gear of the calibrating mechanism.
The motion is transferred via a driving gear and disc gear to the annulus of the planetary gear. The
rotation of the annulus is transferred through a planet gear to a sun gear. The planet gear carrier has
secured to it a drive gear which meshes with the spiral gear. Motion is transmitted via sprial gears
meshing through the intermediate shaft to the intermediate shaft pinion (register drive).
6.3 The sun gear is connected by a shaft to the worm gear meshed with the worm shaft. A friction roller
secured to the worm shaft is in constant contact with a friction disc secured to the disc gear. At the
end of the worm shaft is a calibrating screw.
6.4 The arrangement of gears, worm shaft, friction roller and friction disc enables the speed and direction
of the planet wheel and thus the spiral driving gear (the effective gear ratio) to be adjusted. The
friction roller is moved across the friction disc in either direction by means of the calibrating screw.
The range of adjustment available is approximately 6% and is stepless allowing for very precise
adjustment.
6.5 The calibrating mechanism is mounted between a base plate and gear bracket; Shafts run in bushes
and ball races and the assembly is enclosed by an aluminium alloy cover sealed by a cork gasket and
secured to the base by five screws. Access to the calibration screw is gained by removing the cover
on the side of the calibrating mechanism casing.
6.6 The version of Calibration Mechanism supplied depends upon:
•
Register Readout required i.e. Litres, Imperial Gallons, US Gallons, Decalitres, Litres x
10 and Cubic Metres.
•
The size of capsule ordered, single, double or triple.
•
Whether discharge required is left or right hand.
6.7 It is important that the above information is stated when ordering replacement parts.
7 MECHANICAL REGISTER
7.1 The Veeder Root counter (Register) fitted to the bulkmeter provides a visible readout on five display
wheels of the volume of product delivered through the meter. All counters are reversing but can be
made non-reversing by fitting a slipping clutch to the calibrating mechanism.
7.2 The register is mounted on top of the calibrating mechanism. A drive gear on the calibrating
mechanism meshes with a gear on the underside of a gear plate secured to the register. The gear
plate carries a train of gears that are supplied to give different gear ratios and clockwise or counter -
clockwise drive as required. Drive from the gear plate is transferred through bevel gears to a clutch
shaft.
7.3 A bevel gear on one end of the clutch shaft drives a transfer shaft which in turn drives a totaliser
comprising eight small figure wheels which show the cumulative total irrespective of the number of
times the counter is reset to zero. The clutch assembly on the other end of the clutch shaft
incorporates a gear wheel which drives the right hand display wheel. On each complete revolution of
the right hand display wheel i.e. 0 to 9 a transfer pinion rotates the next display one digit i.e. 0 to 1, 1
to 2 etc so giving a count of delivery. On completion of delivery, the display can be reset to zero by
operating the reset knob, a shutter drops across the display while resetting.
7.4 Full details of the operation, installation and servicing of the Veeder Root register are contained in
Veeder Root Manual 251325 and Manual 158.