Design of shock absorption structure for supporting device of lime kiln rotary kiln
The operation support device of the lime kiln rotary kiln is subjected to complex and alternating dynamic loads, and the traditional rigid support structure is prone to excessive equipment vibration. A composite seismic reduction structure design scheme is proposed to address this issue, effectively improving the stability of equipment operation.
The vibration of the rotary kiln support device mainly comes from the periodic excitation force generated by the dynamic eccentric operation of the kiln body, and its vibration frequency is positively correlated with the kiln body speed. When the vibration acceleration exceeds 0.5m/s ², it can cause problems such as cracking of the support frame weld and early failure of the idler bearing. The traditional solution uses spring isolators, but there are shortcomings such as insufficient damping and poor lateral stability.
The new shock-absorbing structure adopts three-dimensional composite shock-absorbing technology, with the main body composed of high-strength rubber metal laminated supports forming vertical shock-absorbing units, and transverse viscous fluid dampers set up to control horizontal displacement. The design parameters are dynamically matched based on the total mass of the kiln body (800-1200t) and the working speed (0.5-1.2r/min), and the optimal stiffness coefficient (1.5 × 10 ⁶ N/m) and damping ratio (12%) are determined through finite element analysis. The elastic support integrates a temperature compensation device inside, which can automatically adjust the pre tension force to compensate for thermal expansion deformation.
Practical application has shown that this structure reduces the vibration acceleration of the support device by 62%, and reduces the fluctuation range of the contact stress of the supporting wheel to within ± 8%. Under the same operating conditions, the energy consumption of the transmission system decreases by 15%, the temperature rise of the supporting wheel pad is controlled within 35 ℃, and the equipment maintenance cycle is extended by more than three times. This design provides reliable guarantee for the long-term stable operation of rotary kilns and has significant engineering application value.
