Trouble in Hydraulic Hose Assembly
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This is a series of trouble shooting technique for the track machine working in Indian Railway. When you study this you able to rectify a fault of machine. If this is helpful for you than share with others. It may helps them. Thanks for sharing.
Now we study about "Hydraulic Hose Assembly"
What the fault acctually is?
The hose has burst on examination after stripping back the cover of the wire reinforcement reveals random broken wires in the entire length of the hose.
Why it happen?
This indicates high frequency pressure impulse condition. SAE impulse test require- ments are as under:
(a) For a double wire braid reinforcement are 2,00,000 cycles of 133% of recommended working pressure.
(b)For a four spiral wrapped reinforcement (100R-9) are 3,00,000 cycles at 133% maximum operating pressure at +200 0 F (93 0 C).
What should we do?
If the extrapolated impulses in a system amount to over a million in a relatively short time a spiral reinforced hose would be the better choice.
Now we study about "Hydraulic Hose Assembly"
What the fault acctually is?
The hose has burst on examination after stripping back the cover of the wire reinforcement reveals random broken wires in the entire length of the hose.
This indicates high frequency pressure impulse condition. SAE impulse test require- ments are as under:
(a) For a double wire braid reinforcement are 2,00,000 cycles of 133% of recommended working pressure.
(b)For a four spiral wrapped reinforcement (100R-9) are 3,00,000 cycles at 133% maximum operating pressure at +200 0 F (93 0 C).
If the extrapolated impulses in a system amount to over a million in a relatively short time a spiral reinforced hose would be the better choice.
Why it happen?
(a) For a double wire braid reinforcement are 2,00,000 cycles of 133% of recommended working pressure.
(b)For a four spiral wrapped reinforcement (100R-9) are 3,00,000 cycles at 133% maximum operating pressure at +200 0 F (93 0 C).
What should we do?
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