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The Working Principle Of The Pump Seal
Jul 05, 2017

There are those ways to seal the pump

1, packing seal: asbestos rope winding.

2, mechanical seal: dynamic ring plus static ring plus "O" ring seal.

3, soft packing seal: with carbon fiber soft clay wrapped around the shaft, pressurized injection.

Note: packing seal because it is squeezed, easy to wear shaft, Pump Seal but easy to replace; mechanical seal does not hurt the shaft but the replacement of trouble; soft packing seal is not easy to repair the shaft but easy to stop when the pump.

The pump seal prevents abrasion between the pump impeller and the pump casing, improves the water flow at the pump inlet and improves the pump efficiency.

A pump is a machine that delivers liquid or pressurizes the liquid. It will be the original motor mechanical energy or other external energy to the liquid, so that the liquid energy increases, mainly used to transport the liquid, including water, oil, acid, liquid, emulsion and liquid metal, etc., Pump Seal can also transport liquid, gas mixture As well as liquids containing suspended solids. The technical parameters of the pump performance are flow, suction, head, shaft power, water power, efficiency, etc .; according to different working principle can be divided into volume pumps, vane pumps and other types. Volume pump is the use of its studio volume changes to transfer energy; vane pump is the use of rotary blade and water interaction to transfer energy, a centrifugal pump, Pump Seal axial flow pump and mixed flow pump and other types.

Is to prevent the pump shaft and the shell at the disclosure of the sealing device. Commonly used shaft seal type with packing seal, mechanical seal and power seal.

The shaft seal of the reciprocating pump is usually a packing seal. When the transmission is not allowed to leak the media, can be used

Pump seals are mainly packing seals, mechanical seals and power seals. Water pump packing seal packing structure is simple, cheap, easy maintenance, but the leakage of large, Pump Seal large loss of power consumption. Therefore, the packing seal is used to transport the general medium, such as water; generally not suitable for petroleum and chemical media, in particular, can not be used in precious, explosive and toxic media.

The pump seal is suitable for conveying petroleum and chemical media and can be used in a variety of viscosities, corrosive and particle-containing media. American Petroleum Institute standards; in addition to the provisions of the user, should be equipped with container mechanical seal.

Pump power seal Power seal can be divided into two types of back blade seal and secondary impeller seal. When the pump is working, the centrifugal force of the blade (or vice impeller) is reduced to the atmospheric pressure or negative pressure at the shaft seal, so that the pump does not leak during use. Parking centrifugal force disappeared, the back leaves (or vice impeller) sealing effect failure, Pump Seal then rely on the parking seal to play a sealed role.

And the back leaves (or vice impeller) supporting the parking seal more use of filler seal. The packing is made of two types: normal and mechanical. Ordinary packing seal is similar to the general packing seal pump, requiring a slight positive pressure at the shaft seal to avoid dry friction of the packing. Mechanical Tightening Filler The parking seal uses a counterweight so that the pump is loose during operation and the packing is pressed when stopped.