Special Reducer for Stacker-Reclaimer

In order to improve the positioning reliability and stability of the special reducer for stacker-reclaimers, based on the force analysis of the slewing mechanism of the stacker-reclaimer, an improved design is proposed for the existing positioning device of the slewing reducer. Specifically, it is the reinforcement design of the upper positioning plate of the slewing reducer and the split adjustable design of the lower positioning ring.

As a large-scale mobile equipment for continuous loading, unloading and conveying of bulk materials, the stacker-reclaimer has now become the main facility in terminals, freight yards and stockyards. Its slewing mechanism operates continuously during the reclaiming operation and is a major working component. Under the action of large load and variable torque, various components of the slewing mechanism, especially the output shaft of the slewing reducer, are easily damaged. Below, Jinxiang Reducer Manufacturer has made targeted improvements to the upper positioning plate and lower positioning ring of the stacker-reclaimer slewing reducer, which has improved the use effect.

1. Types and Force Analysis of Slewing Bearing Structure of Stacker-Reclaimer

The slewing bearing structure of the stacker-reclaimer is a major component of the slewing mechanism, playing dual roles of support and slewing. It is divided at the junction of the self-rotating parts: the lower part is fixed on the portal structure as the supporting and fixing part, and the upper part supports the rotating parts such as the slewing platform, column structure, boom and luffing mechanism. The rotating parts rotate relatively to realize the slewing function. The common slewing bearing structures of stacker-reclaimers mainly include the large slewing bearing type, conical roller type and trolley type.

2. Research and Improvement of the Positioning Device of the Stacker-Reclaimer Slewing Reducer

The original upper positioning plate of the stacker-reclaimer slewing reducer is made of 25 mm thick steel plate, with long screw holes arranged on the outer side to be fixedly connected with the base body of the slewing platform; the central position is the installation position of the vertical slewing reducer, and screw holes are arranged along the circumference to connect the slewing reducer and the upper positioning plate as a whole; the upper positioning plate is square on three sides and circular on the outer side, and positioning blocks are arranged at the right angles of the square to position the positioning plate on the base body of the slewing platform. The junction between the square and circular parts of the upper positioning plate is a stress concentration point. Due to bearing the torsion and jacking torque of the slewing reducer, it is easy to fracture from the stress concentration point, so it is necessary to carry out modification design to enhance stability.