Titanium pump has excellent corrosion resistance, resistance to most organic acids, inorganic acids, organic compounds and alkali, salt solution corrosion, suitable for conveying solid particles containing, easy to crystallize media, especially for long Cycle operation, improve the economy. Now to introduce the working principle of the titanium pump. Titanium pump Titanium pump works Titanium pump anode cylinder movement of electrons, the axial velocity component Vz and radial velocity component Vr, because Vr axial magnetic field perpendicular to Bz, the electron will be Lorentz force F = eVr'Bz role Therefore, the electrons in the anode cylinder are subject to the axial electric field force and the Lorentz force in eVr'Bz. The movement of the electrons is axial linear motion and cross-sectional circular motion. In the cross section of the electronic wheel rolling radius of the size of the electron velocity and magnetic field strength of the function, the greater the electron velocity (anode voltage is higher), the greater the circle of the rolling line; magnetic field stronger, small. When the anode voltage is high, in order to avoid the electron "rolling down" to the anode, you must add a strong axial magnetic field. In the axial direction, when the electron moves toward the central section of the anode cylinder, the speed of the electrons is accelerated due to the accelerating force of the electric field. After crossing the central section, the electric field forces impede the electron from decelerating and move closer to the cathode plate When the Vz attenuation is zero, the electronic re-accelerated by the force of the electric field and reverse acceleration movement over the center section and then began to slow down, so keep repeating the above movement. The electrons fall on the anode over a long path in the anode can. A large number of electrons are confined by a magnetic field and are rotated in the form of roller lines close to the anode cylinder to form a layer of electron cloud. The rotational frequency of the rotating electron cloud is on the order of 100 megahertz, and the electron density is on the order of 1010 (cm / cm3). The above phenomenon is called Penning discharge. Gas molecules and rotating electrons collide and ionized, gas ions in the electric field, the fly and bombard the cathode titanium. Ion bombardment of titanium produces two effects: 1, sputtering titanium, the formation of titanium film; 2, hit the secondary electron. The sputtered titanium atoms are deposited on the inner wall of the anode and the cathode plate to form a fresh titanium membrane that maintains the pumping capacity of the titanium pump. The sputter ability of ions varies with the energy, mass and incident angle of the incident ions. The ions with large energy and large mass are also capable of sputtering, and the effect of oblique bombardment is better. In order to ensure the suction capacity of the titanium film on the anode cylinder, a sufficient sputtering rate must be ensured, ie enough voltage is required to ensure sufficient ion bombardment energy. Ion bombardment of titanium plate, you can play a secondary electron, the secondary electron by the electromagnetic field into the rotating electron cloud to supplement the lost electrons. Each gas molecule is ionized at the same time, at least one electron is released, these electrons also enter the rotating electron cloud, which together with the secondary electrons due to run to the anode and the loss of electrons, which can continue to maintain Penning discharge . Further Reading: pump valve pipe fittings Exhibition 2016 Exhibition of Information Industry, Internet (Xiamen) Technology Co., Ltd. Author: Asian pumps Network Editor: Yao Xiaoxia (QQ / micro letter:) http://beng.liuti.cn/ (Hotline :)
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