Two-stage centrifugal compressor

• Main Author: TAKAHASHI ICHIKI,MIURA HARUO,NISHIDA HIDEO
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2004
• Edition: 7
• Subjects: BLASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

低压侧第一级和高压侧第二级压缩机叶轮分别安装在转轴的两端。带动上述叶轮的电动马达的转子安装在转轴的中部，而定子由马达壳体支承。马达壳体与第一级压缩机叶轮共同组成第一级压缩机壳体和与第二级压缩机叶轮共同组成第二级压缩机壳体铸成一个整体结构。该整体壳体还与分别设置在第一、二级压缩机的出口侧的中间冷却器和排气冷却器成整体。该两冷却器设在马达壳体下方并与转轴平行，压缩机的主要部分组合成一个紧凑的矩形的平行管道式的结构。 A low pressure-side first-stage compressor impeller and a high pressure-side second-stage compressor impeller are mounted respectively on opposite ends of a rotation shaft. A rotor of an electric motor for driving the two impellers is formed at a central portion of the rotation shaft. A stator of the motor is held by a motor casing. The motor casing, a first-stage compressor casing, which cooperates with the first-stage compressor impeller to form a first-stage compressor, and a second-stage compressor casing, which cooperates with the second-stage compressor impeller to form a second-stage compressor, are cast into an integral construction. This integral casing is further formed integrally with an intermediate cooler, disposed downstream of the first-stage compressor, and a discharge cooler disposed downstream of the second-stage compressor. The intermediate cooler and the discharge cooler are disposed below the motor casing in generally parallel relation to the rotation shaft, and the main portions of the two-stage centrifugal compressor are combined into a compact, generally rectangular parallelepiped configuration.