Diffuser used for centrifugal compressor and centrifugal compressor with diffuser

Abstract

The invention provides a diffuser used for a centrifugal compressor and the centrifugal compressor with the diffuser. The diffuser includes a driving part, a transmission assembly, a regulating assembly, a sliding valve assembly, and a back wall. The transmission assembly is used for conveying the power generated by the driving part to the regulating assembly. The regulating assembly can conduct advance and return movement in the circumferential direction relative to the back wall, and can drive the sliding valve assembly to conduct advance and return movement in the shaft direction. A rollingelement is arranged between the regulating assembly and the back wall. According to the arrangement, an existing structure of the diffuser is combined to better realize intervention of a mechanism adjusting the width of a flow channel; and through the rolling element, low friction matching of the regulating assembly and the back wall can be achieved so that intermediate transferring effect and reversal effect of a torque can be well borne; a torque produced by the driving part is conveyed to the sliding valve assembly in low loss and continuously, furthermore, stepless adjustment of the widthof the flow channel of the diffuser can be achieved, and the problems of stop calculation reversal or surge of the compressor can be effectively improved.

Description

【Technical field】 [0001] The invention relates to the field of refrigeration equipment, and more specifically, to a diffuser of a centrifugal compressor. 【Background technique】 [0002] In the field of refrigeration, the compressor is a particularly critical link in the refrigeration system. A good compressor can provide more excellent cooling performance. As a kind of refrigeration compressor, the centrifugal compressor is widely used in the field of commercial refrigeration because of its ability to provide high-efficiency and large-tonnage refrigeration capacity. However, under different working conditions, especially under partial load operation, problems such as compressor surge and vibration are prone to occur at the constant flow channel of the centrifugal compressor diffuser. In this context, various structural designs are usually adopted to make the width of the flow path of the compressor diffuser adjustable, so as to improve the surge problem of the centrifuga...

AI Technical Summary

Problems solved by technology

However, under different operating conditions, especially under partial load operating conditions, problems such as compressor surge and vibration are prone to occur at the constant centrifugal compressor diffuser channel

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