Dry-compressing screw vacuum pumps and piston compressors

RWTH亚琛大学空气动力学研究所致力于三个独立的高速风洞系统，这些系统具有根本的重要性，因为大多数实验测量都是在这些设施中进行的。间歇运行的风洞是基于一个真空储存器，从试验段上游的一个沉降储存器气球中吸入空气。为了启动和控制试运行，活塞式压缩机需要向所有控制系统提供压缩空气。螺杆式压缩机抽空四个真空罐，由于近五十年的持续运行，因此磨损严重。因此，空气动力研究所无法确保这些设施的安全和持续运行。此外，向风洞控制系统供应压缩空气的三活塞压缩机由于强烈的磨损而产生显著的空转周期，因此经常需要高的维护和修理周期。从中期来看，所有活塞式压缩机都将发生不可修复的故障，导致空气动力研究所的所有高速设施发生故障。仅更换所有螺杆式和活塞式压缩机就可确保空气动力研究所的高速风洞设施、相应的测量系统以及所有正在进行和拟议的研究项目持续、安全和环保地运行。

The Aerodynamic Institute of the RWTH Aachen University pursues three individual high-speed wind tunnel systems which are of fundamental importance as the majority of experimental measurements are conducted in these facilities. The intermittently operating wind tunnels are based on a vacuum storage sucking air from a settling reservoir balloon upstream of the test section. To initiate and control test runs, piston compressors are required to supply compressed-air to all control systems.The screw-type compressor evacuating the four vacuum tanks suffers from strong abrasion due to almost fifty years of constant operation. As a result, the Aerodynamic Institute cannot ensure a safe and constant operation of these facilities anymore. Furthermore, the three piston compressor supplying compressed-air to the wind tunnel control system constantly require high maintenance and repair periods due to strong abrasion yielding significant idle periods. In the medium term, all piston compressors will irreparably fail which results in a failure of all high-speed facilities of the Aerodynamic Institute.Solely the replacement of all screw-type and piston compressors ensures a constant, fail-safe and eco-friendly operation of the high-speed wind tunnel facilities of the Aerodynamic Institute, the corresponding measurement systems and all running and proposed research projects.