In the after-sales maintenance, we often encounter some problems that customers think are very strange. For example, water-filled submersible pumps, QJ deep-well submersible pumps or QSP fountain pumps are all water-filled submersible pumps. Customers reflect the submersible pumps after installation for a period of time. It will automatically trip and immediately start it without any reaction, waiting for a few minutes to ten minutes can start again. When customers encounter such problems, they will call and shout for the first time. What ghosts are they using? At this time, you have to pretend that your grandson will not be dry until you know God.
(QSP fountain pump physical map)
The situation is reflected in the factory, and the technician first gives the answer that the thermal protection device is triggered, which means that the temperature of the motor has exceeded the protection threshold at this time, so the control cabinet disconnects the power supply of the submersible pump and it is a protection act. But why did the well-end submersible pump just install the problem of motor overheating? I carefully inquired about some key details of the customer's installation process, only to know that the customer did not add cooling water to the motor before use, regardless of the QJ potential Well submersible pump or QSP submersible fountain pump clearly stated in the specification that the installation and use requirements must be filled with water in the water injection port and then close the water inlet before the pump can be put into the water to start work. Although adding water to a water-filled submersible pump is a simple, no-easy matter, it can easily be overlooked if it is not careful, and the small thing that is overlooked is amplified into a big problem during the operation of the submersible pump.
So you God, please be sure to read the manual before using the submersible pump and other pump products. When you ensure that there is no illegal operation or does not meet the conditions of use, then start the pump test run, in the case of all indicators and parameters are normal Long-term operation plans can be formulated.
The cause of the failure was mentioned earlier. Since the cause was found, of course, it is the right medicine to solve the problem. In fact, it is only necessary to re-do something that is not done well. The submersible pump motor does not add cooling water, and the motor certainly cannot dissipate heat. In the case of heat dissipation, the continuous operating temperature will be higher and higher, and if there is a protective device, it will trigger the protection “trip” but if it is operated without protection, it will inevitably burn the motor.
Finally, come to the popular science, submersible pumps are generally divided into two types, one is a water-filled submersible pump, QJ deep well pump, QSP fountain pump belong to this type, the other is an oil-filled submersible pump, QY is oil-filled The submersible pump, QW/WQ submersible sewage pump does not belong to any of these two types, it is cooled by the medium. So it does not need to add water at run time.
Do you want to add fuel? want! Yes, the WQ submersible sewage pump is required to be refueled, but this oil is not used to cool the motor, but to block water from entering the motor. Because the WQ submersible sewage pump motor is not a water-filled motor or an oil-filled motor, the water entering the motor will immediately short-circuit, insulation breakdown, and then burn. The mechanical seal alone cannot ensure 100% water does not infiltrate into the motor, so this Only need to design the oil chamber to reinforce the sealing structure. In this way, even if the mechanical seal is broken, the water still needs to break through this level of the oil chamber to enter into the motor, which will further ensure the reliability of the motor.
Ceramic Tower Packing
Compound Fertilizer Co., Ltd. , http://www.nbhumic.com
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