The weight of the steel and ladle of this project is Sa Z000kN, which produces a huge tipping moment on the cantilever of 4.5m in China. It acts on the base bolts of the base and the foundation. The anchor bolts are distributed in diameters of only or only a few. On the circumference, the strength and tightening force control of the anchor bolts is the first element to ensure the safe operation of the equipment.
The device is self-heavy static load, and the symmetrical balance does not produce the tipping moment. When the full-filled steel G is placed on a cantilever support in production, the maximum torque transient is converted to the Gc of the center of rotation, and the overload factor is considered, and the dynamic load factor is long.
The large tilting moment generated by the working load is the most important feature of this type of heavy equipment. After loading, the tension and tension zones are present in the frame.
The force plane composed of the anchor bolt Boshan pump manufacturer and the base is regarded as a section of the column subjected to eccentric load, the bolt unit is pulled, the base is pressed <2j, the principle of balance external torque and the section of beam and column The internal force distribution has the same pattern.
Bolts and foundations with a life span of more than 25 years under normal load conditions meet the fatigue strength conditions. The application of the constraint conditions will be discussed separately due to space limitations. In this paper, the circumferentially arranged bolt group is analyzed, and the combined anti-moment modulus is derived, and the target condition for determining the tightening force optimization control of the bolt is calculated.
To prevent the tightening force from being too large, it will cause great damage to the bolt breakage; the tightening force is too low, which affects the joint rigidity and the additional impact force of slack occurs. The practical calculation method of the important parameter å¦è¡Œ is described separately. For the bolts subjected to tensile load only, the tensile deformation of the bolt under the load and the slack deformation of the frame are proposed. The CLZ is calculated to calculate the maximum stress and the minimum stress of the bolt. To lay the foundation for further calculation of fatigue strength and characteristics of digestion and introduction technology. The key parameters of the elastic curve of bolt and frame connection play an important role in tightening force optimization and fatigue strength conditions. For a class of equipment that bears a large tipping moment, it has commonality. In order to ensure that the dumping accident does not occur due to load, and long-term reliable operation, it is necessary to conduct in-depth discussions on this subject.
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