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1)  vacuum-tightness
真空气密性
1.
The reasons which resulted in nonvacuum-tightness seal of ceramic glaze and metal was discussed.
对1Cr18Ni9Ti不锈钢合金与陶瓷密封进行了分析,解释了陶瓷与金属封接时不能达到真空气密性的原因;同时提出并分析了增加陶瓷与金属密封的安全指标,降低封接成本,并保证密封质量的各种方法。
2)  vacuum tightness
真空严密性
1.
Acceptance standard investigation of vacuum tightness of direct air cooling generating unit;
直接空冷机组真空严密性验收标准探讨
2.
Thorough demonstration was made on various factors affecting on the vacuum tightness of the unit during overhaul and minor repair of the unit,and plenty of tough,careful work was conducted during the repair to make out an effective overhaul inspection and repair scheme.
在机组大、小修中针对影响机组真空严密性的各种因素进行周密的论证,并在检修中作了大量艰苦细致的工作,制订出一套行之有效的检修方案,机组真空严密性试验合格率有很大幅度的提高,使1号~3号机真空严密性均达到合格标准,提高了机组运行的经济性。
3.
Vacuum system is important to the turbine s economy operation,and vacuum tightness is the main factor that affects vacuum of steam turbine.
汽轮机真空是汽轮机经济运行的关键,真空严密性是影响汽轮机真空的主要因素。
3)  vacuum leakproofness
真空密封性
4)  vacuum tightness
真空密闭性
5)  Test of Vacuum Sealing
真空密性试验
6)  vacuum system tightness
真空系统严密性
1.
Principles for direct impacts of vacuum system tightness of steam turbine on condenser pressure,condensate supercooling and oxygen content as well as the influence on the safe operation and economic effect of steam turbine are analyzed,and the importance of tightness of vacuum system is pointed out.
分析了汽轮机组的真空系统严密性直接影响到凝汽器压力、凝结水过冷度、含氧量的机理,以及对汽轮机组安全运行和经济性的影响,指出了真空系统严密性的重要性。
补充资料:高气密性橡胶
分子式:
CAS号:

性质: 即透气性很小的橡胶,用于制造轮胎内胎、气压胶管、气密封及真空密封橡胶。含有极性基团的橡胶,分子间吸引力大空隙小;分子链含有大侧基时,空间位移阻力较大;结晶的橡胶,分子链排列紧密有序。故以上三种分子结构的橡胶都是不易透气的。氯丁橡胶、丁腈橡胶、丁基橡胶、氟橡胶及新开发的环氧化天然橡胶都属耐透气性橡胶,而天然橡胶、丁苯橡胶、硅橡胶则属透气性较大橡胶。为提高胶料气密性,可多加云母粉、滑石粉填充剂;适当增加硫黄用量,提高硫化交联密度;增加胶料的致密度,并尽量少加增塑剂。用于真空系统的橡胶制品宜选用氟橡胶或丁基橡胶。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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