NATIONAL ALUMINIUM COMPANY LIMITED - Rites

8.4.3 The arm shall be raised and lowered by means of hydraulic cylinder mounted on the
carriage. iage. Suitable means shall be provided to prevent damage to the arms should the arm be
accidentally lowered into the side of wagon.
8.4.4 The arm shall be of robust construction either of cast steel or of heavy duty fabricated steel
for the required duty.
8.4.5 The construction of the head assembly of the push arm shall be such that no damage is
suffered by the couplers of wagons and engagement of arm over the coupling assembly as
well as transmittance of indexing forces to accelerate, run and decelerate the train during
the positioning cycle shall be very smooth.
8.4.6 The carriage frame shall be a suitable fabrication assembly of large proportions massive
enough in strength and rigidity for the required duty.
8.5 Travel Carriage Drive System
8.5.1 The travel carriage with push arm shall be propelled to and fro, parallel to train track
through hydraulic motor driving through a gear box and EHT brake.
8.5.2 The rating of the drive equipment and its characteristics shall match with indexing forces
required quired to be exerted in varying amounts depending upon train dynamics and to suit
haulage of 60 wagon loaded rake.
8.5.3 The travel carriage shall ride on vertical bearing wheels and will be guided by horizontal
bearing wheels by suitably transmitting the thrust load from the positioned arm to the
foundation. The wheels/rollers shall be of forged steel and shall run on the rails supported
over the RCC pedestal.
8.5.4 Cushioned emergency bumpers (buffers) shall be provided at the forward and return end of
carriage travel run for protection. These shall be designed to arrest the machine without
undue shock in case the machine exceeds its extremities because of any mal mal-operation.
9.0 DATA SHEETS
9.1 GENERAL
Quantity
No. of wagons to be handled By
: 1 (One) no
each side arm charger at a time : 60
No. of tips by wagon tippler
: 25 per Hour (designed)
: 20 (min.) per hour (guaranteed)
9.2 DESIGN & CONSTRUCTION REQUIREMENTS
Arm : Robust construction either of cast steel or heavy duty fabricated
steel.
Arm Drive : Hydraulic cylinder
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
Page 18 of 64