What role does the tower crane torque limiter play?
The torque limiter can play the weight overload or working radius beyond, beyond the technical performance of the tower crane at the moment, immediately cut off their own lifting or variable power source, will send the alarm signal to prevent the occurrence of accidents.
The overload protection of tower crane is protected by two equipment, lifting load limiter and torque limiter. The latter generally in the big arm root 4-5 meters to the front of the large arm, overloading (Chao Liju) work, it is more important, basically, the scope of work is torque limiter plays a protective role. While the former is the weight limiter function in the arm root within 4-5 meters, because the tower crane is a jib type crane, each allowing weight lifting position corresponding to the different (CAB load curve). For example, such as 63KN.M, the big arm root 2 meters lifting, the theory is 23 tons, while the torque limiter is not over, but in fact, the tower crane at early crouched down, so the weight limiter in this work.
The torque limiter has two kinds of electronic type and mechanical type, electronic type: can show the torque, radius and load, near the tower crane permit torque, there will be a warning signal, although easy to use, the working conditions of cutting has been greatly affected, but not very reliable, easy to damage, the maintenance of trouble. Mechanical type: Although there is no display and can not alarm, but the work of the letter, the structure is simple, not easy to damage, suitable for construction site conditions.
