Diaphragm pumps have the characteristics of long transportation head, low flow rate, and the ability to transport hazardous liquids such as abrasive particles and high viscosity and corrosion, making them an important power equipment in the global industry. Qisheng New Material, as a diaphragm pump diaphragm seal, is also a type of fluorine plastic rubber product that is a type of diaphragm seal accessory in many diaphragm pumps.
The side view (Figure 1) of the traditional flat diaphragm (also known as diaphragm pump diaphragm seal) of a diaphragm pump mainly includes two stages during actual operation:
1、 Discharge stage and suction stage. When the plunger moves to the right under the drive of the transmission system, the volume of the oil chamber increases and the pressure decreases, causing the diaphragm to move to the right. The volume of the slurry chamber gradually increases, and the pressure gradually decreases. The discharge valve gradually closes, and the pressure at the inlet decreases, causing a difference in pressure inside and outside the inlet valve, causing the slurry to gradually enter the diaphragm chamber;
2、 Similarly, when the column is driven by the transmission system to move to the left, the volume of the oil chamber gradually decreases and the pressure gradually increases. When the flat diaphragm (also known as the diaphragm pump diaphragm seal) moves to the left under the pressure difference, the volume of the slurry chamber gradually decreases and the pressure increases. The inlet valve gradually closes under the pressure difference, and the discharge valve opens under the pressure difference on both sides, gradually discharging the fluid in the chamber, Complete the transportation of slurry during reciprocating motion.
It can be seen that the flat diaphragm (also known as the diaphragm pump diaphragm seal) in the diaphragm pump plays a role in sealing the shaft of the diaphragm pump, separating the hydraulic oil and the conveying slurry, so that the conveying slurry only comes into contact with the components in the diaphragm chamber and does not come into contact with the power end sealing device, ensuring the operating life of these components. Moreover, the flat diaphragm (also known as the diaphragm pump diaphragm seal) serves as the discharge membrane of the diaphragm pump and is closely related to the displacement of the diaphragm pump. Therefore, the service life of the flat diaphragm (also known as the diaphragm pump diaphragm seal) in the diaphragm pump is one of the important factors that directly affect the operating time and work efficiency of the diaphragm pump.