隔膜泵具有输送扬程长、流速低、能够输送磨料颗粒、高粘度和腐蚀性等危险液体的特点，是全球工业中重要的动力设备。东晟油封作为隔膜泵膜片油封，也是一种氟塑料橡胶产品，是许多隔膜泵的隔膜密封附件。

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.

隔膜泵的传统平板膜片（又叫隔膜泵膜片油封）的侧视图（图1）在实际运行中主要包括两个阶段：

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、 排放阶段和吸入阶段。当柱塞在变速箱系统的驱动下向右移动时，油室的容积增加，压力降低，导致隔膜向右移动。浆液室的容积逐渐增大，压力逐渐减小。排出阀逐渐关闭，入口压力降低，造成入口阀内外压差，使浆液逐渐进入隔膜室；

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、 当变速箱系统驱动转向柱向左移动时，油室的容积逐渐减小，压力逐渐增大。当平板膜片（又叫隔膜泵膜片油封）在压差作用下向左移动时，浆液室的容积逐渐减小，压力增加。进料阀在压差作用下逐渐关闭，出料阀在两侧压差的作用下打开，逐渐排出腔内的流体，在往复运动过程中完成浆液的输送。

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.

可以看出，隔膜泵中的平板膜片（又叫隔膜泵膜片油封）起到密封隔膜泵轴、分离液压油和输送浆液的作用，使输送浆液只与隔膜室内的部件接触，不与动力端密封装置接触，确保这些部件的使用寿命。此外，平板膜片（又叫隔膜泵膜片油封）是隔膜泵的排放隔膜，与隔膜泵的排量密切相关。因此，隔膜泵中平板隔膜（也称隔膜泵膜片油封）的使用寿命是直接影响隔膜泵运行时间和工作效率的重要因素之一。

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.

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