Technical Principle: Applying Aerospace Engine Fluid Control Concepts to Industrial Grinding

 

      The Lingzhi Multi-Dimensional Rotary Tooth Grinder derives its core technology from fluid control principles used in aerospace engines. Dr. Dong Ping, the founder, previously participated in the development of jet engine fluid performance testing systems at Pratt & Whitney, bringing his expertise in aerospace precision manufacturing to the R&D of industrial grinding equipment.

 

Multi-Dimensional Rotary Tooth Cutting Structure

 

      Traditional ultrafine grinding equipment (classified mechanical mills, jet mills, and blade mills) relies on relatively simple operating principles: classified mechanical mills depend on high-speed impact and shear from grinding discs; jet mills rely on compressed air to accelerate particles for collision. These methods generally suffer from uncontrollable material residence times within the grinding zone, often leading to over-grinding and excessive generation of non-target ultrafine powder.

 

      The Lingzhi Rotary Tooth Ultrafine Grinder features a multi-dimensional rotary tooth cutting structure. The rotor employs a multi-dimensional curved surface design that, paired with a precision-machined stator, creates zones for multi-directional shearing and collision. Upon entering the grinding zone, the material is subjected to three simultaneous forces—shear from the rotary teeth, compression, and inter-particle self-collision—rapidly achieving the target particle size. Although the rotational speed of the rotary teeth is lower than that of traditional grinding discs, the 3D curved design enhances shearing efficiency while reducing component wear.

 

Media-Free Self-Collision Mechanism

 

      Classified mechanical mills rely on high-speed rotating components as grinding media, resulting in rapid wear, high operational noise, and potential material contamination from metal debris; processing high-hardness materials further increases replacement frequency. Jet mills utilize particle self-collision but require high-power air compressors, leading to relatively high overall energy consumption.

 

      The Rotary Tooth Ultrafine Grinder employs a media-free self-collision mechanism where particles grind against each other, eliminating the need for high-speed rotating grinding media or air compressors. The rotary teeth feature high surface hardness and a low friction coefficient. Furthermore, particle self-collision prevents contamination from external media while reducing equipment wear rates and maintenance frequency.

 

Centrifugal Screening and Forced Discharge

 

      This represents the core patented invention of the Rotary Tooth Ultrafine Grinder. An internal screen structure is integrated into the grinding zone; once particles reach the target size, centrifugal force forcibly expels them through the screen to the next process stage, while undersized particles remain for further grinding.

 

      This mechanism effectively mitigates the over-grinding issues common in traditional ultrafine grinding equipment. In classified mechanical mills, uncontrolled residence time causes fine powder to recirculate repeatedly, resulting in excessive ultrafine content; in jet mills, collision frequency is uncontrolled as particles circulate with airflow, and energy consumption rises significantly as particle size decreases. Through internal screening and centrifugal forced discharge, the Rotary Tooth Ultrafine Grinder achieves an "exit-upon-compliance" principle, preventing material recirculation in the grinding zone and delivering a more precise, controllable particle size distribution with lower ultrafine powder content.