Overload protection of magnetic pump
The overload protection of the magnetic pump is an important measure to ensure that the magnetic pump can operate safely under overload conditions. The following is a detailed analysis of the overload protection of the magnetic pump:
1. The basic structure and working principle of the magnetic pump
The magnetic pump is a type of pump that drives the impeller to rotate through a magnetic field to generate fluid flow. In the magnetic pump, the driving end and the impeller convert the rotational kinetic energy through magnetic coupling. Since there is no mechanical contact, the magnetic pump has the characteristics of no leakage, no pollution, and no noise, and has been widely used in chemical, pharmaceutical, medical and other fields.
2. The importance of overload protection
Since the magnetic pump may encounter excessive load during operation, this will cause excessive stress and heat inside the pump body, thereby damaging the pump body or affecting the performance of the pump. Therefore, in order to ensure the safe operation of the magnetic pump, overload protection measures must be taken.
3. Implementation of overload protection
Overload protection based on current monitoring
Principle: When the magnetic pump is running, the current will change with the change of load. By detecting the current of the pump, it can be determined whether there is an overload.
Implementation method: Set a preset safety current value in the control system of the magnetic pump. When it is detected that the current exceeds the safety current value, the control system will immediately take measures, such as disconnecting the power supply or adjusting the speed, to protect the pump body from damage.
Advantages: real-time monitoring, rapid response, and good protection effect.
Slip protection of magnetic transmission
Principle: When the driven part of the magnetic transmission is running under overload, the driven part will slip on the shaft, thereby protecting the motor and pump body from damage.
Implementation method: The design of the magnetic transmission allows the driven part to slip automatically when overloaded, thereby releasing excessive load.
Advantages: No additional equipment is required, the structure is simple, and the protection effect is reliable.
Protection of cooling and lubrication system
Principle: When the magnetic pump is running, a small amount of liquid is needed to flush and cool the annular gap area between the inner magnetic rotor and the isolation sleeve and the friction pair of the sliding bearing. When the cooling lubricant is insufficient or the flushing hole is blocked, the medium temperature will be higher than the working temperature of the permanent magnet, causing the inner magnetic rotor to gradually lose its magnetism, and then the magnetic transmission will fail.
Implementation method: Ensure the normal operation of the cooling and lubrication system, regularly check and replace the coolant, and keep the flushing hole unobstructed.
Advantages: Prevent permanent magnet failure and pump body damage caused by excessive temperature.
In summary, the overload protection of the magnetic pump is achieved through a variety of measures. These measures not only ensure the safe operation of the magnetic pump under overload conditions, but also improve the overall performance and reliability of the pump body.
