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发表于 2011-9-14 10:20
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来自： 中国江苏扬州
STRENGTH TEST OF ACCOMMODATION LADDER
1.Requirements and methods of test
Turn .lower .and hoist the unloaded accommodation ladders three times.to check the lowering and hoisting flexibility of turning gear.and the reliability of the limit switch and brake ,check the proper operation of actuator .while lowering and hoisting the accommodation ladder. Measure the starting current .working current .voltage of electric motor of winches .measure the thermal insulation resistance of electric motor and controlling plant after test, which should be not less than 1MΩ
2. Strength test of accommodation ladders(load test)
a. Turn the accommodation ladder outboard at the angle of 55°to horizon
b. Carry out the test of weight distribution , put a load of 300kg（weight）on the upper platform .150kg on lower platform, 75kg on each step (or 150kg on every other step ). Keep in a static condition for 15 minutes. Then remove the loading and check that running parts of accommodation ladders should be flexible.There is to be no blocking occurred .and no crack on the upper platform
c. Limiter function of hoisting unit
d.
3.Insulation resistance measurement
Item Cold condition (MΩ) Hot condition(MΩ)
Elect.Motor (std) 500 500
Heater (std) 500 500
Elect.Motor (port) 500 500
Heater (port) 500 500
4.Work current test
Item Start current (A) Work current (A)
Elect.Motor (std) 6.1 6.8
Elect.Motor (port) 6.1 6.9
5.Check function of limit switch
6.Check function of remote control |
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