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E-mail
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Phone
15268109772
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No. 8, Xuguanghengshantou, Dage Village, Yushan Township, Fuyang District, Hangzhou City
Hangzhou Haoda Ultrasonic Equipment Co., Ltd
Common troubleshooting of focused ultrasonic disperser: from abnormal noise to power attenuation
Date: 2025-07-16Read: 24
Focused ultrasonic disperserWith the advantage of energy concentration, it is widely used in the field of nanomaterial dispersion, but long-term high-frequency operation is prone to various faults. Mastering the troubleshooting logic from abnormal noise to power attenuation can effectively reduce the risk of equipment shutdown.
The abnormal noise during equipment operation is mainly caused by mechanical coordination issues. If there is a sharp "sizzling sound", it may be due to loose connection between the transducer and the amplitude rod. At this time, the equipment needs to be turned off, and a torque wrench should be used to tighten it again according to the specified torque (usually 25-30N · m). At the same time, check whether there is an oxide layer on the connection surface, and apply coupling agent after polishing with fine sandpaper. If a "dong dong" impact sound is heard, it is mostly due to the distance between the amplitude lever and the bottom of the container being too close. The probe depth should be adjusted immediately by stopping the machine and maintaining a gap of 5-10mm to avoid rigid collision.
Abnormal temperature rise is a common hazard. When the temperature of the device exceeds 60 ℃ after running for 10 minutes, it may be due to a malfunction of the cooling fan or blockage of the air duct. First, check if the fan is rotating. If it stops, replace it with a fan of the same model; If dust accumulates in the air duct, compressed air can be used to blow the heat dissipation holes to ensure smooth heat dissipation. In addition, continuous operation for more than 30 minutes can easily cause the transducer to overheat. It is recommended to set a working cycle (such as starting for 5 minutes and stopping for 2 minutes) and use an ice water bath for cooling.
Power attenuation is often a progressive fault. If the power value of the display screen decreases and the dispersion effect deteriorates, first check whether the output frequency of the ultrasonic generator deviates from the rated value (usually 20-40kHz), and calibrate it to the standard value through a frequency meter. If the power still does not improve, it may be due to the aging of the transducer. Use a multimeter to check its impedance value, which should be between 20-50 Ω normally. If it exceeds the range, a new transducer needs to be replaced.
When overload protection is frequently triggered, it is necessary to check whether the load is abnormal. When the viscosity of the sample exceeds the rated range of the equipment (generally ≤ 500cp), it will cause a sudden increase in current. At this time, the sample should be diluted or the power level should be reduced. If the protection is still triggered when unloaded, it may be due to damage to the circuit components, and the manufacturer needs to be contacted to replace the relay or thyristor.
In daily maintenance, it is recommended to check the wear of the probe every week, and replace it in a timely manner when there are pits or cracks at the end of the amplitude rod to avoid exacerbating the fault due to stress concentration. Through targeted troubleshooting, over 80% of common faults can be resolved on-site, ensuring stable operation of the equipment.