Electromagnetic pumps, also known as magnetic pumps, operate based on modern electromagnetic principles, utilizing permanent magnets to achieve non-contact, indirect transmission in chemical processes. These pumps use the interaction between a magnetic field and an electric current within a conductive fluid to generate an electromagnetic force. This force creates a pressure gradient in the fluid, which then interacts with a movable pump body, causing it to vibrate and push the liquid out.
There are various types of electromagnetic pumps, including large-scale models (as shown in Figure 1). They can be broadly classified into two categories: DC electromagnetic pumps and AC electromagnetic pumps. DC pumps include conductive types such as planar and helical designs, as well as pyro-electromagnetic pumps. AC pumps, on the other hand, consist of single-phase and three-phase types, with configurations like planar, annular, spiral, and circular induction.
In DC conduction pumps, the structure is generally simpler, consisting of poles, electrodes, and a pump channel. A directional magnetic field is created between the N and S poles. When a direct current passes through the electrodes on either side of the pump channel, the current direction is perpendicular to the magnetic field. According to the left-hand rule, this generates an electromagnetic force that drives the flow of liquid metal. By changing the polarity of the poles or the electrodes, the flow direction can be reversed. Adjusting the magnetic field strength or the current level allows control over the pumping force.
A brushless DC electromagnetic pump (as illustrated in Figure 2) offers improved efficiency and reliability by eliminating mechanical brushes, reducing wear and maintenance needs.
For AC conduction pumps, the working principle involves electrodes, a core, main and auxiliary coils, and a pump channel. When the main coil is energized with alternating current, it generates an alternating magnetic field in the air gap. This field induces a secondary magnetic field in the pump channel, creating an electromotive force in the secondary coil. The electrode and liquid metal form a closed AC circuit. At any given moment, the direction of the electromagnetic force is determined by the left-hand rule, driving the liquid metal in a specific direction through the pump channel.
An AC electromagnetic pump (shown in Figure 3) operates similarly but is designed for alternating current applications, offering smooth and continuous flow characteristics.
Electromagnetic metering pumps are a specialized type of pump that uses an electromagnetic push rod to drive a diaphragm inside the pump head, causing it to move back and forth. This motion changes the volume and pressure within the pump chamber, which in turn controls the opening and closing of suction and discharge valves. As a result, the pump can accurately measure and deliver a specific volume of liquid. These pumps are particularly suitable for low-pressure applications and offer advantages such as a simple design, low energy consumption, high accuracy, and ease of adjustment.
The electromagnetic metering pump (as depicted in Figure 4) is widely used in industries requiring precise dosing and controlled flow rates.
7+Person Hot Tub
7+ Person Hot Tub,large outdoor spa,outdoor living pool spa,spa with outdoor heated pool,modern outdoor hot tub
Guangzhou Aijingsi Sanitary Products Co.,Ltd , https://www.infinityedgehottub.com