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一、问题及现状慈溪热电厂3#汽轮机系杭州汽轮机厂引进德国西门子技术制造的调整抽汽式汽轮机,其抽汽逆止系统由抽汽速关阀及相应的案例油管道组成。在运行过程中,发现如下缺陷:1、抽关阀严密性差该机运行约一年后,即发现抽汽速关阀泄漏,停机后,若不关抽汽隔离阀,汽机转速无法到零。3#机抽汽速关阀有二道保护组成:一是阀底部的止回机构,其作用相当于一只普
First, the problem and the status quo Cixi Thermal Power Plant Steam Turbine Hangzhou Steam Turbine Plant Hangzhou, Germany introduced the introduction of technology to adjust the extraction steam turbine, the steam check system consists of pumping off valve and the corresponding case oil pipeline. In the course of operation, found the following defects: 1, pumping valve tightness bad machine running for about one year, that is, pumping speed off valve leakage, shut down, if not related to pumping isolation valve, the turbine speed can not reach zero. 3 # pumping speed off valve has two protection components: First, the bottom of the check valve mechanism, its role is equivalent to a Cape