Understand the structure and principle of the chemical magnetic pump in detail

The chemical magnetic pump is mainly composed of the pump head, magnetic actuator (magnetic cylinder), motor, connecting base plate, and other parts. The magnetic actuator of the magnetic pump is composed of an external magnetic rotor, an internal magnetic rotor, and a non-magnetic isolation sleeve. When the motor drives the external magnetic rotor to rotate, the magnetic field can penetrate the air gap and non-magnetic materials, drive the internal magnetic rotor connected with the impeller to rotate synchronously, realize the contactless synchronous transmission of power, and transform the dynamic sealing structure easy to leak into a static sealing structure with zero leakage.

Below is a list of contents

1. Working principle of chemical magnetic pump

2. Inner magnetic cylinder

3. External magnetic cylinder

4. Bearing components

5. Magnetic body

6. Isolation cover

Working principle of chemical magnetic pump

1. Transmission principle

The whole process of the chemical magnetic pump is a magnetic drive centrifugal pump, which transmits torque in a contactless way. When the motor drives the outer rotor (i.e. outer magnetic steel) assembly to rotate, through the action of the magnetic field, the magnetic force line passes through the isolation sleeve to drive the inner rotor (i.e. inner magnetic steel) assembly and impeller to rotate synchronously. Since the medium is enclosed in the static isolation sleeve, the purpose of no leakage pumping medium is achieved and the shaft seal leakage of the mechanical drive pump is solved. Because the liquid is enclosed in a static isolation sleeve, it is a fully sealed and leak-free pump type.

2. Chemical magnetic pump structure

It mainly includes the motor, support, outer magnetic cylinder (driving rotor), inner magnetic cylinder (driven rotor), isolation cover, sliding bearing, transmission shaft, impeller, and pump body. Among them, the magnetic coupling for pump drive is composed of an inner magnetic cylinder, outer magnetic cylinder, isolation cover, and magnetic body, which is also called permanent magnetic coupling and magnetic coupling.

Inner magnetic cylinder:

The inner magnetic cylinder and the pump rotor are coaxial, and permanent magnetic blocks are installed in the direction parallel to the axial direction. The magnetic blocks are isolated by stainless steel and other materials for magnetic isolation (reducing transverse magnetic leakage) and support protection. In order to protect the magnetic blocks on the inner magnetic cylinder, a layer of protective materials (such as plastic, stainless steel, etc.) is generally covered on the outer surface of the inner magnetic cylinder.

External magnetic cylinder:

The outer magnetic cylinder is connected with the motor. Similarly, a magnetic block is installed on the cylindrical surface of the outer magnetic cylinder, and the magnetic blocks are isolated and supported by magnetic isolation materials. Generally, the outer magnetic cylinder will not be added with a protective sleeve (it will not contact the medium).

Bearing components:

The pump end adopts a sliding bearing structure, and the main materials are graphite, silicon carbide, polytetrafluoroethylene, etc. The driving end adopts a deep groove ball bearing, angular contact ball bearing, etc.

Magnetic body:

The magnetic body is the main component of torque transmission. Its quality directly affects the service life, efficiency, and torque transmission of the chemical magnetic pumps. At present, ferrite, rare earth cobalt, and neodymium iron boron are widely used in China.

Isolation cover:

The isolation cover is located between the inner and outer magnetic cylinders and fixed with the pump body with certain measures to form a closed cavity. The main materials of the isolation cover are stainless steel, titanium alloy, plastic, carbon fiber, ceramics, and other materials. Isolation sleeve is a very important component of the chemical magnetic pump. Because of its combination with pump body, inner and outer magnetic cylinders, there is no need for power seal components to achieve real 0 leakages.

Taicang magnetic pump Co., Ltd. was born in 1979. It cooperated with Shanghai Chemical Design Institute to form a unique core research project with magnetic drive pump, and achieved great success. It has become the first company in China to comprehensively design and produce magnetic drive pump. Today, Taicang magnetic pump Co., Ltd. has become a leading manufacturer of magnetic drive pumps in China, with many patents and 12 utility model patents.