Orifice plate of basic device of mechanical seal system-

Orifice plate of basic device of mechanical seal system

　2019-03-23　　

The orifice plate of the basic device of the mechanical seal system:

The orifice plate is a device used to control flow. It is often used in a sealing system for medium flushing. The structure is shown in Figure 6-5. The size of the small holes of the orifice plate are: 1, 1.2, 1.5, 2.0, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6.7, 8, 9, 10mm. The flow range is 2~40L/min, and the pressure range is 0~6.3MPa. The principle of flow control by the orifice plate is that when the fluid passes through the narrow orifice, the flow velocity increases sharply, and the flow channel suddenly expands after passing through the orifice, and the fluid forms a large number of vortices, which causes the loss of fluid mechanical energy (mostly converted into heat energy) A huge pressure drop is formed. The fluid flow through the orifice plate is closely related to the pressure difference between the two sides of the orifice plate and the diameter of the small hole. The greater the pressure difference, the greater the flow; the larger the diameter of the orifice, the greater the flow. The structure, pressure difference, and the corresponding relationship between the orifice specifications and flow rate of the standard mechanical seal system can be found in the standard 'Orifice plate for mechanical seal system (JB/6634—1993)'. Sand mill mechanical seal

Figure 6-5 Orifice plate

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