Tie rod is a long rod
with bolts at both the end which hold the bedplate , frames and entablature firmly
together in compression, and to transmit the firing forces back to the
bedplate, long tie bolts are fitted through these three components and then
tightened hydraulically.
MUST READ: How To Use Hydraulic Jack In Tie Rod
MUST READ: How To Use Hydraulic Jack In Tie Rod
To prevent excessive
bending moments in the transverse girders, the tie bolts are positioned as
close to the center of the crankshaft as possible. Because the tie bolts are so
close to the crankshaft, some engines employ jack bolts to hold the crankshaft
main bearing cap in position instead of conventional studs and nuts.
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Purpose/functions :
ReplyDeleteThey provide for fatigue strength.
They also provide for proper running gear alignment which prevents fretting.
They help to reduce the bending stress being transmitted to the transverse girder.
Tie rods transmit the gas forces which act on the cylinder head.
The firing pressure force of the piston is directly transmitted to the main
bearing and consequently to the engine frame through the tie rod
support.
reference: deven aranha