The magnetic vane pump is an innovative type of pump equipment that combines magnetic coupling transmission technology with the structure of vane pumps. It achieves non-contact power transmission through the synchronous rotation of the inner and outer magnetic rotors and converts dynamic seals into static seals, thus completely solving the leakage problem of traditional vane pumps when transporting flammable, explosive, volatile, toxic and corrosive liquids. The following is a detailed introduction to the magnetic vane pump:
I. Working Principle and Structural Features
The core components of a magnetic vane pump include an outer magnetic rotor, an inner magnetic rotor, a non-magnetic isolation sleeve, and the vane pump body. When the motor drives the outer magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic substances, driving the inner magnetic rotor connected to the vane pump rotor to rotate synchronously. During this process, power transmission does not require physical contact, achieving the transformation from dynamic sealing to static sealing. The vane pump body adopts the traditional vane design, and the liquid is sucked in and discharged through the reciprocating motion of the vanes.
Magnetic drive: Composed of an outer magnetic rotor, an inner magnetic rotor and an isolation sleeve, it is the key for magnetic vane pumps to achieve contactless transmission.
Vane pump body: It includes the rotor, stator and vanes, and the liquid is conveyed through the movement of the vanes.
Isolation sleeve: Made of high-strength corrosion-resistant materials to ensure zero leakage of the medium.
Ii. Performance Advantages
Zero leakage feature: The magnetic vane pump adopts a static sealing structure, fundamentally eliminating the possibility of medium leakage. It is particularly suitable for transporting highly toxic, flammable, explosive and valuable media.
Corrosion resistance: The flow-through components are mostly made of corrosion-resistant materials such as fluoroplastic alloys and special ceramics, which can adapt to the transportation of various corrosive media.
High efficiency and energy saving: The magnetic vane pump adopts a direct drive method, eliminating the need for shaft seals and couplings of traditional pumps, reducing energy loss and enhancing the pump’s efficiency.
Strong self-priming ability: Some magnetic vane pumps have excellent self-priming ability and can start and draw liquid by themselves without pre-filling.
Overload protection: When the driven part of the magnetic drive operates under overload conditions or the rotor gets stuck, the driving and driven parts of the magnetic drive will automatically slip off to protect the pump and motor.
Iii. Application Fields
Magnetic vane pumps are widely used in the following fields:
Chemical industry: Transporting strong corrosive media such as hydrochloric acid and hydrofluoric acid, as well as organic solvents and high-purity liquid medicines, etc.
Pharmaceutical industry: It is used for material transportation in the chemical reaction and synthesis process, meeting the high requirements for pump materials in the pharmaceutical industry.
Environmental protection engineering: Treating corrosive wastewater containing solid particles, such as electroplating solution circulation systems, pesticide stock liquid filling production lines, etc.
Liquid chlorine transportation: For extremely dangerous liquid chlorine media, the magnetic vane pump adopts secondary sealing technology to ensure that the medium does not leak.
For the transportation of easily solidifying media: For liquids that are prone to solidification at normal temperature, the magnetic vane pump can be made into a double-jacketed type and insulated with steam to ensure that the liquid inside the pump does not solidify.
Iv. Selection and Usage Precautions
Flow rate and head: Determine the required flow rate and head based on process requirements, and select the appropriate pump type and specification.
Medium characteristics: Select the appropriate pump material based on the nature of the medium being conveyed, such as corrosion resistance, temperature resistance, etc.
Temperature and pressure: Determine the temperature and pressure of the conveyed medium according to the process requirements, and select the appropriate pump type and material.
Maintenance and care: Regularly inspect the cooling and lubricating fluid of the magnetic drive, ensure the flushing holes are unobstructed, and prevent the magnetic components from demagnetization due to excessively high medium temperature.
Preparations before startup: Ensure that the pump cavity is filled with medium and avoid prolonged idling.