1) screw air compressor with aircooling
风冷型螺杆式空气压缩机
2) explosion screw air compressor
螺杆式移动空气压缩机
1.
Through analysing the struction and theory of explosion screw air compressor for coal mine,analysing the safety and economic of the system in usage in front and back,points out the importance that system in the modern well to produce and fix.
通过对煤矿用螺杆式移动空气压缩机结构、性能、工作原理的研究分析、技术改造和设备投入使用前后的经济性比较,指出了该设备在现代化矿井生产应用中的重要性。
3) Screw air compressor
螺杆式空气压缩机
1.
Application of screw air compressor oil on electric locomotives;
铁路机车螺杆式空气压缩机油的应用
2.
Screw air compressor oil is developed to meet the requirement that the new type railway passenger locomotive be equipped with screw air compressor.
为适应铁路新型客运机车装用螺杆式空气压缩机的需要,研制螺杆式空气压缩机油。
3.
Aptitude controller of screw air compressor jointly developed by the author and certain air compressor factory are studied.
介绍了笔者与某空气压缩机厂联合研制的螺杆式空气压缩机智能控制器。
4) screw air compressor oil
螺杆式空气压缩机油
1.
Througheut comparing screw air compressor oil that we developed independently with Shell Corena RS_(32) in physico-chemical performances we drawed the conclusion that screwair compressor oil show choice is superior to Shell Corena RS_(32) in some performance index and can be applied safely in the electric locomotive.
为满足电力机车螺杆式空气压缩机的需要,选择自主研制的铁路机车螺杆式空气压缩机油与ShellCorena RS32润滑油进行主要理化性能比较,经过3年的装车运用试验表明:研制油各项性能指标优良,许多性能超过对比油,能够满足机车螺杆式空气压缩机安全使用1个中修期以上的用油要求。
5) screw air compressor
螺杆空气压缩机
1.
Through the performance test of screw air compressor by changing work conditions, analyzing the test results, investigating other air compressor basic parameters, several suggestion and reference about the Auxiliary equipment s design and choice of screw air compressor are presented.
分析了 3 5m3 /min螺杆空气压缩机的变工况性能试验结果。
6) Serew refrigerant compressor
螺杆式制冷压缩机
1.
The article offers some suggestions on the revision of the national standard of serew refrigerant compressor,it is expected to give people some help in revising the standard.
本文对修订螺杆式制冷压缩机国家标准中有异议的几个问题进行探讨,希望在修订该标准时能提供一些启发和参考。
补充资料:通用机械:螺杆压缩机
利用螺杆形转子在气缸内作回转运动来压缩和输送气体的回转压缩机。螺杆压缩机广泛应用于矿山﹑化工﹑动力﹑冶金﹑建筑﹑机械和制冷等部门。排气量为25~38000米3 /时。在大气压力下吸气时﹐单级的排气压力可达0.5兆帕﹔两级和三级的排气压力分别达1.2兆帕和3兆帕以上。单螺杆压缩机都是注液冷却的。工业生产中以双轴(双螺杆)的压缩机最多﹐但单轴(单螺杆)的压缩机也逐渐获得应用。
图 双螺杆压缩机 为双螺杆压缩机的结构和工作过程。两个相互啮合的螺杆(转子)螺旋面与气缸内壁构成工作容积。工作容积的大小随着转子的转动而变化﹐位置也不断向前移动﹐从而完成吸气﹑压缩和排气过程。主动阳螺杆和从动阴螺杆的齿数可以有不同的配合﹐如3对5﹑5对7﹐但最常用的是4对6的配合。转子端面型线对螺杆压缩机效率有很大影响。20世纪70年代初期﹐非对称型线取代对称圆弧型线后﹐压缩机效率提高10%。新出现的X型线等又使绝热效率提高5%左右。
双螺杆压缩机分为干式和注油式两种。干式﹕螺杆轴端装有同步齿轮﹐可保证转子间高精度啮合﹐同时使相对运动的螺杆间不接触﹐不须注油润滑﹐因而排出的气体不含润滑油。为了改善密封性﹐压缩机采用较高转速(3000~20000转/分)﹐它除用电机增速驱动外﹐还可用高速汽轮机直接驱动。 注油式﹕螺杆轴端不装同步齿轮﹐靠两螺杆直接接触传动﹐须注油润滑冷却。注油还能改善密封性﹐转速可降低到1000~3000转/分。螺杆压缩机工作噪声很大﹐中小型螺杆压缩机均采用隔声罩。
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