If the load on the driven part of the magnetic drive becomes overwhelming, it will cause the part to slip on the shaft, which serves as a protective measure for the motor. The slip allows the motor to avoid damage by preventing it from being strained beyond its limits.
During the operation of the pump, it is necessary to utilize a small amount of liquid to wash and cool the space between the inner magnetic rotor and the isolating sleeve, as well as the friction pair of the sliding bearing. Typically, the coolant flow rate is set at 2% to 3% of the pump's design flow rate. The annular gap area between the inner magnetic rotor and the isolating sleeve tends to generate significant heat due to the occurrence of eddy currents. In order to prevent overheating, it is important to ensure sufficient cooling lubricant and a smooth and unobstructed flushing hole. Failure to do so may result in the medium's temperature exceeding the working temperature of the permanent magnet, leading to a gradual loss of magnetism in the inner magnetic rotor and ultimately causing the magnetic drive to fail. The magnitude of temperature rise in the annulus area depends on the type of medium being used. For water or water-based liquids, the temperature rise can be kept within 3-5°C, while for hydrocarbon or oil mediums, the temperature rise can be maintained at 5-8°C.
advantage
The plastic-lined magnetic pump employs a non-contact torque transmission mechanism facilitated by magnetic transmission. This makes it feasible to replace the dynamic seal with a static seal, thus rendering the pump completely leak-proof. The inner magnetic rotor and the pump shaft are entirely enclosed by the isolating sleeve and pump body, thereby putting to rest the age-old issue of "running, emitting, dripping and leaking." This effectively eliminates the leakage of hazardous and toxic media in the refining and chemical industry through pump seal and ensures the physical and psychological well-being and safety of employees while promoting safe production practices.
The plastic-lined magnetic pump offers several advantages when compared to the motor-type DC brushless water pump. These include:
1. Enhanced durability and longevity: The plastic lining of the magnetic pump provides a protective layer, making it more resistant to corrosion and wear. This ensures that the pump lasts longer and requires less maintenance.
2. Improved efficiency: The magnetic pump utilizes magnetic force to drive the impeller, eliminating the need for brushes or commutators. This design ensures that there is no frictional loss, resulting in higher efficiency and reduced energy consumption.
3. Quieter operation: With the absence of brushes or commutators, the plastic-lined magnetic pump operates with minimal noise. This makes it ideal for applications that require a quieter environment, such as medical equipment or residential use.
4. Leak-proof design: The plastic lining of the pump prevents any leakage, ensuring a reliable and safe operation. This is especially important in applications where fluids need to be contained or transported without any risk of spillage.
5. Chemical compatibility: The plastic lining used in the magnetic pump is resistant to a wide range of chemicals. This makes it suitable for pumping corrosive or hazardous liquids without the risk of damaging the pump or contaminating the fluid.
In summary, the plastic-lined magnetic pump stands out as a superior alternative to the motor-type DC brushless water pump due to its enhanced durability, improved efficiency, quieter operation, leak-proof design, and chemical compatibility. These advantages make it a reliable choice for various pumping applications.
The closed static seal in the pump shaft effectively eliminates any possibility of medium leakage, offering reliable performance. This versatile design allows for both underwater and waterproof applications, ensuring its suitability for various conditions.
The elimination of independent lubrication and cooling water is a beneficial change that results in reduced energy consumption.
This pump offers several advantageous features. Firstly, its power consumption is minimal, resulting in energy efficiency. Additionally, it effectively dampens and reduces vibrations, thereby lessening the impact of motor vibrations on the pump and minimizing any potential motor damage caused by cavitation vibrations.
In case of overloading, the ceramic shaft will allow the rotor to slip, which provides a protective measure for both the pump and motor.