L68B2 Mast SectionTower Crane moment limiter test according to the method of fixed width code and Fixed Code amplitude change
Tower Crane moment limiter test in accordance with the method of fixed code and fixed code amplitude, repeated three times each. Every time I get a good request. 1. Fixed-amplitude variable-code test: 1 at the maximum operating range Ro to normal operating speed lifting rated weight Qo, Torque limiter should not act, may be normal lifting. Load landing, loading to 110% qo after the slowest speed to rise, moment limiter should be action, load can not rise, and output alarm signal. 2 Take 0.7 times the maximum rated lifting capacity (0.7QM) and repeat 1 test at the corresponding load allowable maximum working range R0.7.
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2. Fixed-code amplitude variation experiment: 1 no-load measuring the maximum working range RM, 0.8 Rm and 1.1 Rm corresponding to the maximum rated lifting capacity (QM) , and marking on the ground. 2 when lifting the maximum rated lifting weight (QM) at a small range about 1 meter above the ground and slowly changing the amplitude to rm-1.1 RM, the Torque limiter should act to block the power supply of the outward changing amplitude and lifting loop and output the alarm signal. Back Up, start from a small margin, change the amplitude outwards at an abnormal speed, change the amplitude outwards at a low speed to a low speed when reaching 0.8 rm, the Torque limiter should act to cut off the amplitude outwards and the power of the lifting loop when RM-1.1 RM And output an alarm signal. 3 no-load determination corresponds to 0.5 times maximum additional starting component (0.5 QM) maximum working range R0.5,0.8 R0.5 and 1.1 R0.5 values, and is marked on the ground. 4. Repeat 2 tests.
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