Rotatable vane diffuser of centrifugal compressor

Abstract

The invention relates to a rotatable vane diffuser of a centrifugal compressor, a rotating wheel with a groove is mainly connected on a partition board which is connected with a spiral housing of the compressor, and the rotating wheel is connected with a crank with a pin connected on a driving rotating shaft with vanes of the diffuser. The driving rotating shaft is connected with the partition board, and the driving rotating shaft is connected with an electric actuator via a connecting rod mechanism of the crank through a connecting rod connected on the spiral housing of the compressor. A pointer which is matched with a scale plate positioned on the spiral housing of the compressor for use is connected on the connecting rod. A driven rotating shaft with the vanes of the diffuser which is connected with the partition board by rotation is further distributed on the partition board, and the driven rotating shaft is connected with the rotating wheel with the groove through the crank with the pin connected with the driven rotating shaft. The rotatable vane diffuser has excellent pneumatic performance and high wear resistance and elasticity, and the long-term use can not cause the phenomenon of corrosion or sticking. Furthermore, the rotatable vane diffuser has simple structure, easy manufacture, high transmission precision and convenient operation, and can realize the manual or automatic regulation of the rotation of the vanes of the diffuser, effectively change the position of a pumping point of the compressor, expand the stable range of working conditions of the compressor and further meet the complicated variable working conditions which change the flow rate.

Description

technical field [0001] The invention relates to a diffuser for a centrifugal compressor, in particular to a diffuser with rotating blades for a centrifugal compressor. Background technique [0002] Vane diffusers for centrifugal compressors include fixed vane diffusers and rotatable vane diffusers. The fixed vane diffuser has a steep performance curve and a narrow range of stable working conditions. This is because the inlet angle of attack of the vane diffuser has a great influence on the flow of the centrifugal compressor. When the flow rate decreases and the angle of attack reaches a certain value, serious detachment will occur in the fixed vane diffuser, causing the compressor to break out. Surge. In order to expand the range of stable working conditions of the centrifugal compressor, when the flow rate of the centrifugal compressor changes, the inlet geometric angle of the vane diffuser vane can be changed accordingly to adapt to the changed working conditions, so tha...

AI Technical Summary

Problems solved by technology

This rotatable vane diffuser is rotated through a gear transmission mechanism. Although this transmission mechanism can realize the rotation of the vane diffuser blades, its structure is complicated, the parts manufacturing precision is high, the manufacturing process is troublesome, and the assembly process is difficult. It is very difficult to adapt to the compressor with a split face, and the gear transmission mechanism needs lubricating oil to lubricate during the working process, which is easy to make the fluid carry oil and cause pollution

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