An introduction to the proper use of the feed grinder in a compound feed processing unit—save this now!

　　What is the structure of a compound feed processing unit? Let’s analyze it below.

　　Feeder: The feeder consists of a variable-speed motor, a reducer, an auger barrel, and an auger shaft.

　　The motor consists of a three-phase induction AC motor, an eddy-current clutch, and a tachogenerator, and is used in conjunction with the JZT controller. Its output speed can be adjusted by the JDIA electromagnetic speed-control motor controller.

　　Reducer: The feed reducer is a cycloidal pinwheel reducer with a reduction ratio of 1.10, directly connected to the variable-speed motor to reduce speed, thereby maintaining the effective rotational speed of the feed screw within the range of 12 to 120 rpm.

　　Feeding Auger: The feed screw consists of a screw barrel, a screw shaft, and a mounted bearing. The auger serves to convey material, with an adjustable rotational speed that allows the feed rate to be varied, thereby achieving the rated current and output. The auger shaft can be withdrawn from the right end of the auger barrel for cleaning and maintenance.

　　What is the correct method for operating the feed grinder in a compound feed processing unit? Let’s analyze it below.

　　1. The crusher should be securely mounted on a concrete foundation to ensure reliable long-term operation. If the operating location is frequently relocated, the crusher and motor should be installed on a base constructed from angle steel. When the crusher is powered by a diesel engine, the two must be properly matched in power—specifically, the diesel engine’s output should slightly exceed that of the crusher—and their pulley grooves must be identical, with the outer faces of the pulleys aligned on the same plane.

　　2. After installing the crusher, inspect the tightness of all fasteners; if any are loose, tighten them.

　　3. Check that the belt tension is appropriate and that the motor shaft and the crusher shaft are parallel.

　　4. Before starting the crusher, manually rotate the rotor to verify that the claws, hammers, and rotor move smoothly and reliably, check for any collisions with the housing, confirm that the rotor’s direction of rotation matches the arrow indicated on the machine, and ensure that the motor and crusher are properly lubricated.

　　5. Do not replace the pulley arbitrarily, as this may cause the crushing chamber to explode due to excessive rotational speed or reduce operational efficiency due to insufficient speed.

　　6. After the crushing platform is started, it will run idly for 2–3 minutes; only proceed to normal operation once no abnormalities are detected.

　　7. During operation, continuously monitor the crusher’s performance, ensure uniform feeding, and prevent blockages or material buildup. Do not operate under overload for extended periods, and watch for excessive vibration, abnormal noise, overheating of bearings or the machine body, or material spattering. If any of these occur, stop the machine immediately, inspect it, and resume operation only after the fault has been rectified.

　　8. Crushed materials should be carefully inspected to prevent hard objects such as copper, iron, and stones from entering the crushing chamber and causing accidents.

　　9. Operators must not wear gloves; when feeding material, they should stand to the side of the crusher to prevent rebounding fragments from striking the face.

　　10. In the event of a blockage, it is strictly prohibited to force-feed or use hands or rods to pull the feed.

　　At present, the productivity of feed-processing machinery widely used in China remains relatively low. For example, domestic extruders typically operate at 3 to 5 tons per hour, a significant gap compared with international standards. Research and development in feed-processing equipment should focus on advancing both individual machines and complete production lines, with more sophisticated automated control systems. The Chinese feed-machinery industry ought to move toward larger scale and greater intensification, leveraging expanded sales to reduce production and administrative costs and thereby enhance overall efficiency.