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The Main Parameters Of Machinery Seals Selection
Jun 02, 2017

Machinery Seals are classified as one of the more sophisticated mechanical foundation components, which are the key components of various equipment such as pump, reaction kettle, turbine compressor, submersible motor Machinery Seals and so on. Its sealing function and service life depends on many elements, such as selection, the accuracy of the machine, the use of accurate devices.

First, the selection method

Machinery Seals according to the operating conditions and the nature of the Machinery Seals is not the same, there are high temperature, low temperature Machinery Seals, high pressure, corrosion resistance Machinery Seals, resistant to granular media Machinery Seals and to adapt to easy vaporization of light hydrocarbon media Machinery Seals, Should be based on different uses to choose not the same type of construction and Machinery Seals.

The main parameters of the selection are: sealed chamber pressure (MPA), fluid temperature (℃), operating speed (M / S), the characteristics of the fluid and the device sealed and other useful space.

The basic principles of selection are:

1. According to the sealing chamber pressure, determine the seal structure selection of balanced or non-balanced type, single-ended or double-ended and so on.

2. According to the operating speed, determine the choice of rotary or stop, fluid dynamic or non-touch type.

3. According to the temperature and fluid properties, determine the conflict and auxiliary sealing information, and the accurate selection of smooth, scouring, insulation, cooling and other Machinery Seals cycle maintenance system.

4. According to the device sealed the useful space, determine the choice of multi-tensioned spring or single tension spring or wave tension spring, built-in or exterior type.

Second, the Machinery Seals of the device and the use of the request

1, the Machinery Seals on the machine's precision request (pump Machinery Seals as an example)

(1) the Machinery Seals parts of the shaft (or sleeve) radial runout maximum does not exceed 0.04 ~ 0.06MM.

(2) rotor axial movement does not exceed 0.3MM.

(3) seal the cavity and the sealing end of the positioning of the positioning of the face of the shaft (or sleeve) the appearance of the beating business does not exceed the maximum 0.04 ~ 0.06MM.

2, the recognition of seals

(1) to acknowledge that the seal of the device is not in common with the type of request.

(2) before the device carefully to the assembly diagram, the number of parts is not complete.

(3) Selection and Machinery Seals with a mechanical transmission, the tension spring left and right, the need to press the rotation of the shaft to pick.

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