For the car luffing tower crane, when choosing type mechanical torque limiter, must adapt to and the crane
1), the main reason is because of the formation of overload: it is because of the heavy weight more than the rules; The second is the horizontal distance of more than the radius of homework, after installation of torque limiter, when weight overweight or homework Radius is too large, and cause torque exceeds the technical performance of the tower crane, automatically cut off the lifting or transformer power supply, and send out alarm signals, to prevent the accident.
2), the current for the torque limiter has two kinds: one kind is electrical, the other is a mechanical type. Electrical on the display can be read as radius of torque, homework and weight data, when close to the tower crane allowed torque, early warning signal, easy to use, but influenced by operation conditions, poor reliability, easy to damage, maintenance inconvenience; Mechanical model no display device also no early warning signal, but reliable work, is to adapt to the site construction conditions, simple structure, lower damage rate.
3) electrical overload alarm point must also try to actual operation radius and the actual weight lifting to calibrate.