How to classify the electromagnetic pump?

Electromagnetic pump has no mechanical moving parts, simple structure, good sealing performance, reliable operation, no shaft sealing, so it is used in chemical industry and printing industry to transport some toxic heavy metals, such as mercury, lead, etc., used in nuclear power equipment transmission The liquid metal (sodium or potassium, sodium-potassium alloy) as a heat carrier is also used for conveying molten non-ferrous metals during casting production. With a flow rate of up to 13,000 m3/h, the pressure reaches 1.7 MPa and the temperature reaches 1200°C.

Electromagnetic pump can be divided into AC pump and DC pump according to the power supply form.

According to the way of feeding current in liquid metal, it can be divided into conduction type (conductance type) electromagnetic pump and inductive type electromagnetic pump. Conductive electromagnetic pumps use DC or AC. It has a tube made of non-magnetic refractory metal (see figure). The tube is surrounded by magnets, and the lines of force are perpendicular to the tube. When a current is applied perpendicular to both the tube and the magnetic flux, according to the left-hand rule, a mechanical force is generated to force the conductive fluid out of the tube. The conductance type is generally a small pump for low pressure and small flow. In a conductive electromagnetic pump, current is conducted directly from the external power source to the liquid metal via the electrodes on both sides of the pump channel. In induction pumps, multiphase AC power is used inductively. Current is induced by the alternating magnetic field. The latest type of inductive electromagnetic pump is a linear induction pump equipped with flat, linear stator windings. The induction force is axial and the size is large. Large flow pumps are of this type.

Electromagnetic pumps can be divided into flat pumps and cylindrical pumps according to different structures.

A device that uses a magnetic field to interact with an electric current in a conductive fluid to cause the fluid to be subjected to an electromagnetic force to generate a pressure gradient, thereby promoting fluid movement. Most of the utility model is used for pumping liquid metal, so it is also called a liquid metal electromagnetic pump. Electromagnetic pumps can be divided into alternating current pump and direct current pump according to the form of power supply. According to the way of feeding current in liquid metal, it can be divided into conductive type electromagnetic pump and inductive type electromagnetic pump. According to different structures, it can be divided into plane pump and cylindrical pump. In the conduction pump, the current is directly transmitted from the external power source to the liquid metal through the electrodes on both sides of the pump channel. In the induction pump, the current is induced by the alternating magnetic field. The electromagnetic pump has no rotating parts, simple structure, good sealing and reliable operation, so it is used to transport some toxic heavy metals such as mercury and lead in the chemical and printing industries; in the atomic energy industry, it is used to transport chemicals that are especially lively. Metals, such as sodium, potassium, and sodium-potassium alloys; can be used as a dosing pump for active metals such as aluminum and magnesium in foundry companies, but are now mainly used by large companies such as the military. The disadvantage of electromagnetic pumps is their low efficiency.

The disadvantage of electromagnetic pumps is their low efficiency, which has not been universally adopted in the smelting and foundry industries.

The electromagnetic pump is similar to an ordinary electromagnetic valve. It uses alternating current as the working power. An electric current forms an alternating fixed magnetic field through an electromagnetic winding, forms an interaction with a movable pump body, drives a pump body to vibrate, and pushes a liquid output.