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a look at the mechanical seals

by:DMS Seals     2020-06-25
The mechanical seal was invented by George Cook and was originally referred to as the \"cook seal \".
Used for refrigeration compressor for the first time.
In a very short time, it became popular in the industrial process.
Demand for mechanical seals reached $1 billion.
Mechanical Seal is simplified to mechanical seal of end face or mechanical end face.
Generally settled in rotating equipment such as pumps and compressors.
Mechanical seals are expected to prevent liquid leakage between the rotating shaft and the stationary pump casting.
In fact, under the highly competitive specifications, mechanical seals are more helpful than the mechanical packaging that was widely used earlier.
In general, the mechanical seal consists of four functional components: the main seal surface, the secondary seal surface, the drive device and the drive device.
The core part of the unit is the main sealing surface, which combines the two rings in hard materials (such as sic) and softer materials (such as carbon), respectively.
Select the appropriate material according to the chemical properties, pressure and temperature of the liquid.
The two rings are processed using a processing process called grinding to obtain the necessary flatness because one rotates with the shaft and the other is stationary.
There will then be many secondary sealing surfaces that require a fluid barrier but do not rotate with each other.
This drive is used to maintain close contact between the two main sealing surfaces.
Since mechanical seals are one of the special seals in the industry, there is more than one type of the term, depending on the functional elements.
Some common types are described below, which are usually divided into two categories depending on whether the secondary seal of the shaft is dynamic or stationary.
Dynamic is called a pusher, and static is called non-pusher.
In addition, there is a common style called ink cartridge seal, originally designed for installation in the device, and the component type seal is difficult to install due to the design of the device.
For example, it can be seen that the pump designed this type to fit different packing box hole sizes and gland bolt patterns.
In addition to this, the gap seal is another type, usually used for bearings and other structures that are prone to wear, such as O-ring.
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