The common faults of organic fertilizer round throwers are mainly concentrated in three types: poor particle forming effect, abnormal equipment noise and vibration, and decreased yield, and most of them can be quickly solved through targeted inspections. The following are specific types of faults, cause analysis, and corresponding solutions.

1、 Poor particle rounding effect (uneven surface, low roundness)

This is a common malfunction, and the core cause is usually related to material status or equipment parameter mismatch.

Fault manifestation: The surface of the finished particles is rough, angular, or exhibits adhesion and agglomeration.

Common reasons and solutions:

Reason 1: Improper moisture content of the material (too high can cause adhesion, too low can cause fragmentation).

Solution: To detect the moisture content of materials, it is usually necessary to control it within 15% -20%; When the moisture content is too high, a drying pretreatment step can be added; If it is too low, spray a small amount of water or adhesive (such as starch solution) through the equipment spray system.

Reason 2: The tilt angle of the rotating disc/drum is not appropriate (if the angle is too small, the material will stay for too long and easily clump; if the angle is too large, the stay time will be too short and unable to fully round).

Solution: Adjust the tilt angle to 15 ° -25 ° (depending on the material characteristics), observe the particle roundness after testing, and gradually optimize the angle.

Reason 3: The clearance between the scraper and the rotating disc/drum is too large, resulting in the accumulation of material residue.

Solution: After shutdown, adjust the position of the scraper and control the gap between 5-10mm to ensure that the scraper can completely scrape away the residual materials on the inner wall and prevent the accumulation of materials from affecting the roundness of new materials.

2、 Abnormal noise and severe vibration during equipment operation

This type of malfunction is often related to loose, worn or stuck components, and requires immediate shutdown for inspection to avoid damaging core components.

Fault manifestation: The equipment emits metal friction sound, impact sound, or a significant increase in overall vibration amplitude during operation.

Common reasons and solutions:

Reason 1: Loose transmission system components (such as loose coupling bolts between the motor and gearbox, and loose fixing bolts on the bearing seat).

Solution: After stopping the machine, use a wrench to check the bolts of the transmission parts one by one, and re tighten the loose parts; If the coupling is misaligned, the coaxiality of the two shafts needs to be calibrated.

Reason 2: Bearing wear or insufficient lubrication (abnormal noise and vibration may occur after the bearings of the motor, reducer, or rotating disc/drum wear).

Solution: Disassemble the bearing cover and check if the bearing is corroded or if the ball bearings are damaged; If lubrication is insufficient, add lithium based grease; If the bearing is worn out, replace it directly with a new bearing of the same model.

Reason 3: Foreign objects (such as metal blocks or large clumps of material) get stuck inside the rotating disc/drum.

Solution: Cut off the power, open the equipment maintenance door, and clean up any foreign objects inside; Check if a filter is installed at the feed inlet. If not, it is recommended to install a filter to prevent foreign objects from entering.

3、 Sudden decrease in equipment output

The decrease in production is usually caused by poor material transportation or excessive equipment load, and needs to be investigated from the entire process of "feeding processing discharging".

Fault manifestation: There is a significant decrease in the output of finished particles per unit time, or intermittent material breakage occurs.

Common reasons and solutions:

Reason 1: Unstable feeding speed (too fast feeding causes equipment overload, while too slow feeding leads to insufficient raw material supply).

Solution: Check the speed of the feeding conveyor, adjust the parameters of the frequency converter, and maintain uniform feeding; If the feeding port is blocked, clean the blocked material and if necessary, expand the feeding port or install a vibrating feeder.

Reason 2: The rotating disk/drum speed is too low, and the material cannot obtain sufficient centrifugal force.

Solution: Check if the motor speed is normal. If the speed decreases, check if the motor is out of phase and if the gearbox is leaking oil (oil shortage can cause a decrease in speed); Add lubricating oil to the gearbox or contact an electrician for motor maintenance.

Reason 3: Severe material accumulation inside the equipment reduces the effective processing space.

Solution: Thoroughly clean the accumulated material on the inner wall of the rotating disc/drum and the discharge port after stopping the machine; Check if the scraper is worn. If the scraper cannot effectively scrape the material, replace it in a timely manner.

4、 Motor overheating (temperature exceeding 60 ℃)

If the motor overheats and is not dealt with in a timely manner, it may cause the motor to burn out. Priority should be given to investigating load and heat dissipation issues.

Fault manifestations: The motor casing is hot to the touch, accompanied by an odor, or the thermal protection switch trips.

Common reasons and solutions:

Reason 1: Equipment overload (such as excessive feed volume, internal jamming, resulting in motor load exceeding rated power).

Solution: Reduce the feeding amount, clean the internal jamming, and restart the motor for trial operation after it cools down.

Reason 2: Poor heat dissipation of the motor (damaged fan, clogged heat dissipation holes with dust).

Solution: Clean the dust from the motors heat dissipation holes and check if the fan is rotating properly; If the fan is damaged, replace it with a fan of the same model.

Reason 3: The motor bearings are damaged, resulting in increased frictional resistance.

Solution: Disassemble the motor end cover, check the condition of the bearings, replace damaged bearings, and replenish lubricating grease.