Method for on-line detecting bearing rigidity of foundation of track crane

Abstract

The invention belongs to the technical field of track cranes, and provides a method for on-line detecting bearing rigidity of a foundation of the track crane. An inclination sensor is mounted on a rotary table of the track crane; the longitudinal inclinations of the rotary table when the unloaded track crane rotates to 0 degree, 90 degrees, 180 degrees and 270 degrees are measured by the inclination sensor; a longitudinal inclination change curve of the rotating of the rotary table of the unloaded track crane under different foundation coefficient conditions, obtained through simulation of thecrane is combined, so that the spot foundation coefficient and ground levelness are obtained through an interpolation method; and according to the obtained spot data, a track crane load form under anideal state is amended by the interpolation method, so as to obtain the track crane load form guaranteeing the operation safety, and then the safe operation of the track crane is guided. The whole process is automatically performed by a vehicle-mounted PLC, so that the operation is convenient.

Description

technical field [0001] The invention relates to an on-line detection method for foundation load-bearing stiffness, in particular to an online detection method suitable for crawler crane foundation load-bearing stiffness, and belongs to the technical field of crawler cranes. Background technique [0002] Crawler cranes are widely used in petrochemical, electric power, metallurgy and other fields due to their advantages such as large lifting capacity, small grounding specific pressure, various boom combinations, and flexible operation. However, in the crane operating instructions, only ground endurance requirements are usually given, but no foundation stiffness requirements, which increases the risk of lateral tipping of the crane due to uncertain foundation deformation during use. When the crane is in operation, the uneven grounding pressure of the crawler will lead to uneven settlement of the foundation, coupled with the elastic deformation of the structural parts such as th...

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Problems solved by technology

Because the moment limiter on the crane can give the corresponding amplitude and rated lifting capacity according to the jib elevation angle detected in real time, this provides a guarantee for the operator to ensure that the crane is not overloaded in the luffing plane through proper operation of the luffing mechanism. Safety guarantee; but on the side of the boom, because there is no corresponding safety device, and there is no mechanism that can keep the boom vertical, the lateral tilt of the boom is inevitable

If the non-linear strength of the jib or the anti-overturning stability of the whole machine reaches its limit before reaching the above-mentioned termination state, the crane will have a strength or overturning accident, especially for the long arm of a crawler crane with a large tonnage. This risk is even more pronounced in

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