螺杆压缩机,特别是工艺用螺杆压缩机的密封是很值得注意的问题。下面介绍国外几种实用的密封系统供参考。 1.美国I-R(Ingersoll-Rand)公司的四种密封系统(图1) (1)标准的迷宫密封(图1a) 这种密封主要用在干燥空气、氮气和干燥的真空条件时,也可用在不是危险的,对少量的泄漏能够允许的任何干燥气体。密封衬套是固定的,上面开有机械齿槽,密封由空气或气体流经齿槽时的反复节流和膨胀而产生。这种密封形式在 Sealing of screw compressors, especially for process screw compressors, is a noteworthy issue. Here are several foreign practical seal system for reference. 1. Four Ingersoll-Rand Seal Systems (Figure 1) (1) Standard Labyrinth Seal (Figure 1a) This seal is mainly used in dry air, nitrogen and dry vacuum conditions Not dangerous, any dry gas that can be allowed for small leaks. The seal bushing is fixed with a mechanical slot on it, sealed by repeated throttling and expansion of the air or gas flow through the slot. This form of seal at