In pharmaceutical research and material science experiments, laboratory rotary granulators are key equipment for preparing uniform particles. Its stable operation not only affects sample quality, but also relates to the reliability of experimental data. This article systematically outlines the daily maintenance standards and common troubleshooting solutions for equipment, helping researchers improve their equipment management skills.

1、 Construction of preventive maintenance system

After daily homeworkLaboratory rotary granulatorCleaning work is crucial. It is recommended to use a soft bristled brush to remove residual materials on the inner wall of the drum, and to use a vacuum cleaner to clean the dust accumulation in the heat dissipation holes. Pay special attention to the cleanliness of the transmission belt and bearing seat area to prevent dust from entering the mechanical structure. Check whether the nozzle of the spray system is blocked every week, dredge it with a special needle and test the atomization effect to ensure that the adhesive is evenly distributed.

The periodic maintenance of lubrication systems is often overlooked. Use food grade silicon-based grease for quarterly maintenance of the main shaft bearings. Before applying, clean the old grease and replace the sealing ring. The lubrication cycle of the gearbox gear set should be adjusted according to the actual operating time. It is recommended to replace the lubricating oil every six months and observe the color change of the oil to determine the wear condition.

2、 Typical fault diagnosis and handling

When particles do not form, first check whether the moisture content of the raw materials meets the standard. Excessive moisture can cause mold sticking, while insufficient moisture can make it difficult to agglomerate into particles. At this point, the drying program can be initiated to preprocess the material, or the spraying speed can be adjusted to balance the humidity. If the problem persists, the surface smoothness of the mold needs to be checked. Minor scratches can be repaired with polishing paste, and severe damage must be replaced with a new mold.

Abnormal vibration often indicates imbalance in dynamic balance. After stopping the machine, loosen the fastening bolts and check the fixing condition of the blade components one by one. Unbalanced material distribution can also cause vibration, in which case the feeding angle of the feeder needs to be recalibrated. For sudden and severe shaking, it is necessary to immediately stop and check if any foreign objects have entered the inside of the drum.

Failure of the temperature control system may result in excessive or insufficient drying. First, verify if the temperature control sensor probe is in good contact, and then use a standard thermometer to verify the accuracy of the displayed values. The slow heating caused by aging of heating elements can be determined by measuring the resistance value, and replacing the electric heating tube of the same specification can restore its performance. Poor discharge of condensed water from the cooling system can affect the dehumidification effect, and regular dredging of the drainage pipeline is a necessary measure.

3、 Practical skills for emergency maintenance

When encountering a sudden power outage, the manual turning device can help discharge the accumulated material in the cavity. Before operation, be sure to cut off the main power and hang a warning sign. Slowly rotate the handle until the material is completely discharged. After restoring power supply, do not immediately start at full load. Instead, run without load for a specific period of time until all components are fully lubricated before resuming production.

For the problem of significant differences between batches, the "three phenomena" investigation method can be used: on-site observation of process parameter fluctuations, on-site detection of key control points, and on-site comparison of historical data records. Establishing standardized operating SOP documents can effectively reduce fluctuations caused by human factors.

4、 Digitization empowers new trends

Modern devices are commonly equipped with intelligent monitoring systems that collect real-time parameters such as speed, torque, and temperature to generate operation logs. By using data analysis software to draw historical curve graphs, potential fault risks can be alerted in advance.

The introduction of IoT technology has enabled remote diagnostic functionality. Technicians can view the device status through the cloud platform and guide on-site personnel in basic maintenance. The application of AR augmented reality technology breaks through spatial limitations, and engineers can receive step-by-step disassembly guidance to complete complex maintenance tasks by wearing smart glasses. These new technologies are reshaping the traditional device management model.

With the development of micro nano processing technology, precision online detection has become possible. The laser particle size analyzer operates in conjunction with the granulator, providing real-time feedback on the particle growth process and automatically adjusting process parameters. This closed-loop control system achieves a high degree of experimental repeatability, providing reliable basis for large-scale production. In the future, an intelligent and networked equipment management system will become a standard solution for laboratory construction.

The efficient operation of the laboratory rotary granulator relies on scientific maintenance and quick troubleshooting. Establishing a prevention oriented and data-driven equipment management model can not only extend the service life but also ensure experimental accuracy. With the deep application of intelligent technology, device management is transforming from experiential to precise, providing more stable hardware support for scientific research and innovation.