Sectional shape of steel belt of mechanical seal-

Sectional shape of steel belt of mechanical seal

　2017-06-19　　

The section shape of the steel strip of the mechanical seal:

There are also two cross-sectional shapes of steel strips: W-shaped and V-shaped, as shown in Figure 3-6. The elasticity of W-shape is better than V-shape, but it is difficult to process.

58B seal replaces Johncrane 58B mechanical seal steel strip materials generally include low carbon steel, stainless steel, titanium, Monel, etc., with a thickness of 0.15-0.20mm. Among the non-metallic strips, asbestos and flexible graphite strips are the main materials. Teflon strips, ceramic fiber paper, and carbon fiber paper spiral wound gaskets have also appeared abroad. The addition of inner and outer rings has a certain effect on improving the sealing performance of the wound gasket. Due to the cross-sectional shape of the metal belt, the wound gasket has a certain degree of elasticity. Coupled with the inner and outer rings, when the basic gasket is compressed, the outer ring and the inner ring are in tension and compression respectively; when the basic gasket is When the sheet load drops, the energy stored in the inner and outer rings is released, which improves the resilience of the gasket. Compared with other types of gaskets, the ability to adapt to pressure and temperature changes is enhanced, and the need for secondary tightening is greatly reduced. In addition, adding an inner ring can prevent gasket pressure loss caused by over-tightening, reduce the gap between flanges, and prevent erosion of the gasket due to fluid vortex; adding an outer ring is beneficial to the positioning of the gasket during installation.

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