Connecting structure for impeller and high-speed shaft of steam compressor

Abstract

The invention discloses a connecting structure for an impeller and a high-speed shaft of a steam compressor. The connecting structure comprises the impeller and the high-speed shaft. An internal-thread fixing hole is formed in a contact surface of the high-speed shaft, and the impeller and the high-speed shaft are tightly connected in the axial direction through the mode that a pull rod penetrates through an impeller inner hole to be fixed to the high-speed shaft and a locking nut is arranged at the tail end of the pull rod for locking. A contact surface of the impeller is provided with two symmetrical key grooves, the contact surface of the high-speed shaft is provided with two keys matched with the key grooves, and torque is transmitted through matching of the key grooves and the keys when the high-speed shaft and the impeller are connected.

Description

technical field [0001] The invention relates to the field of steam compressors, in particular to a connection structure between a steam compressor impeller and a high-speed shaft. Background technique [0002] The steam compressor is the key equipment to increase the steam temperature and pressure in the MVR evaporation system. In the MVR evaporation system, the steam compressor is used as the core component to realize the recompression of the secondary steam in the MVR system, increase the pressure and temperature of the secondary steam, and then enter the heat exchanger to heat the material to achieve the purpose of saving raw steam. Its working principle is to increase the pressure and temperature of the steam through the high-speed impeller. [0003] For steam compressors, the reliable connection between the impeller and the high-speed shaft is the basic guarantee for the efficient and stable operation of the unit. At present, there are mainly the following connection m...

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