What is the calibration value of a tower crane?
Do you mean the calibration value of crane lifting moment? That should be the product of the maximum magnitude of the tower crane and the corresponding maximum lifting load.
Three, gravity moment MThe product of amplitude L and the corresponding lifting objects called Q gravity lifting moment, the unit is kN - M.Tower crane capacity is based on lifting moment representation. It uses the product of the maximum working range and the corresponding maximum lifting load as the calibration value of the lifting moment.Four 、 lifting height HIt refers to the vertical distance from the surface to the parking level of the crane sling allows the highest position. The unit is m.Five, work speed1. lifting speed (down) Vn - stable state of motion, the vertical displacement velocity of the rated load. The unit is m/min.2. crane (CART) running speed of Vk, stable state of motion, the running speed of the crane. The operating speed of a crane with rated load on the horizontal (or horizontal rail) surface, at the height of 10m away from the ground, and when the wind speed is less than 3m/s.
Tower crane calibration value is to benchmark material to be calibrated by standard liquid titration value, calibration to parallel mark three times, take the average value, if the requirement is not strict, error within 3 per thousand, strictly within 1 per thousand.Main performance parameters of tower crane:1. Lifting weight G1. weight G - was the quality of the heavy lift. The unit is t.2. rated lifting weight Gn allows crane lift weights together with the quality of the sum of the spreader.3. maximum weight Gmax - normal work conditions under the crane, the maximum permissible rated lifting weight lifting.Two, range LL - 1. range of level ground when the crane is positioned between the spreader, no-load vertical center line to the center line of the rotary horizontal distance. The unit is m.2. biggest Lmax - crane, jib angle or the minimum car in arm the limit position of the amplitude.3. Lmin minimum amplitude - jib angle or trolley jib in maximum limit position within the range.
