Working Principle of Water Drop Hammer Mill

1. Core Working Process

1. Feeding StageMaterials (such as corn, wheat, soybean meal, straw, etc.) are fed into the equipment through the top feeding port, and are directed into the crushing chamber by the guide plate. The feeder is usually equipped with an iron removal device to remove metal impurities, so as to avoid damaging the hammer, rotor and other core components, and ensure the safe operation of the equipment.
2. Crushing Stage (Core Part)The motor is directly connected to drive the rotor to rotate at a high speed, with a rotating speed of 1500–3000 rpm. The hammers installed on the rotor impact, shear and rub the materials repeatedly at an extremely high speed, which is the main force for material crushing.The water-drop-shaped crushing chamber is the key design of this equipment, which plays a vital role in improving crushing efficiency: it can effectively break the material circulation layer formed in the crushing process (avoiding invalid circulation of materials), and its tapered section accelerates the material, while the expanded section decelerates the material, forming a secondary impact effect — the crushed materials rebound to the toothed plate and are hit again by the hammers, further improving the crushing effect. Compared with ordinary cylindrical crushers, the crushing efficiency is increased by 15–25%.
3. Classification and Discharging StageAfter being crushed, the materials are screened by the screen installed at the bottom of the crushing chamber. When the particle size of the materials is smaller than the screen hole (the screen hole size can be adjusted between 1–8 mm according to needs), the materials pass through the screen under the combined action of centrifugal force and airflow, and are discharged from the bottom discharge port as qualified powder.The coarse materials that fail to pass through the screen will be rebounded back to the crushing area by the airflow and the toothed plate, and will be crushed again until they meet the required particle size, ensuring the uniformity of the finished product.

2. Key Structures & Their Functions (Determine Working Performance)

• Rotor: Composed of main shaft, pin shaft and hammer, it has passed dynamic balance verification, ensuring stable operation, low vibration and low noise during high-speed rotation.
• Screen: Adopting water-drop-shaped and staggered hole design, it ensures smooth discharge and is not easy to block, and the screen can be replaced quickly according to the required particle size.
• Hammer-Screen Gap: Adjustable through external adjustment device, which can control the crushing degree (coarse crushing, fine crushing or micro crushing) to meet different production needs.
• U-Shaped Secondary Impact Groove: Located at the bottom of the crushing chamber, it strengthens the secondary crushing effect of materials and improves the crushing efficiency and uniformity.
• Quick-Open Door & Elastic Screen Pressing Device: It is convenient to replace the screen and hammer, reduce maintenance time and improve production efficiency.

3. Core Advantages Derived from Working Principle

• High Efficiency: The water-drop-shaped chamber eliminates material circulation and realizes secondary impact, which greatly improves the crushing efficiency and reduces energy consumption.
• Uniform Particle Size: The combination of screen classification and secondary crushing ensures that the finished product has uniform particle size and no over-crushing phenomenon.
• Stable Operation: The dynamically balanced rotor design ensures low vibration, low noise and long service life of the equipment.
• Easy Maintenance: The quick-open door and adjustable gap design make the replacement of wearing parts (hammer, screen) more convenient and reduce maintenance costs.

4. Applicable Materials