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首页> 外文期刊>International Journal of Fluid Machinery and Systems >Bidirectional Trapezoidal Versus Unidirectional Spiral Groove Performance in Dry Gas Seals
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Bidirectional Trapezoidal Versus Unidirectional Spiral Groove Performance in Dry Gas Seals

机译：双向梯形与干气密封件的单向螺旋槽性能

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摘要

The gas film characteristics of bidirectional dry gas seals with trapezoidal grooves were studied by comparing with the traditional spiral grooved gas seals. The two-dimensional compressible Reynolds equation was solved by finite difference method. The typical performance parameters including gas film force, leakage, gas film stiffness, and torque were compared under different parametrical conditions. The pattern of trapezoidal grooves wasted part of groove area in bidirectional operation; though the grooves were designed by overlapping trapezoids to make up for the performance loss, the resulting decrease in gas film stiffness was notable. The resisting disturbance ability of trapezoidal grooved seals was poorer than that of spiral grooved seals, while the load-carrying capacity, sealing ability, and power consumption of trapezoidal grooved seals differed slightly from those of spiral grooved seals. The trapezoidal grooved seals are not recommended in unidirectional rotational compressors due to the decreasing stability.
机译：通过与传统的螺旋沟槽气密封进行比较，研究了具有梯形槽的双向干气密封的气膜特性。通过有限差分法解决了二维可压缩雷诺等式。在不同的参数条件下比较包括气体膜力，泄漏，气体膜刚度和扭矩的典型性能参数。梯形槽的图案在双向操作中浪费了一部分的凹槽区域;虽然凹槽是通过重叠梯形而设计以弥补性能损失而设计的，但是由此产生的气体膜刚度降低是值得注意的。梯形沟槽密封件的抗干扰能力比螺旋沟槽密封件更差，而螺旋槽密封件的负载容量，密封能力和梯形沟槽密封件的功耗略微不同。由于稳定性降低，不建议在单向旋转压缩机中建议梯形槽密封件。

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