Centrifugal Compressor with Torsion Spring Adaptive Variable Geometry Vaned Diffuser

Abstract

The invention relates to a centrifugal compressor with a torsional spring self-adaption variable geometric blade diffuser. The centrifugal compressor comprises a volute (1), an end wall (9), an end wall boss (8), an air way (3), a diffuser (4), diffuser blades (2), compressor blades (5), an impeller (6) and a torsional spring (7); inner holes are formed in the diffuser blades (2); the end wall boss (8) is arranged on the end wall (9) of the volute (1); the torsional spring (7) is sleeved at the external of the end wall boss (8) during assembling; and the end wall boss (8) is embedded in inner holes of the diffuser blades (2). According to specific working conditions of air currents in an outlet of the impeller (6), the self-adaption adjustment of the diffuser blades (2) is realized through the effect of the torsional spring (7), and the diffuser blades (2) is automatically deflected to an optimal angle in non-design working condition point, so that the angle adjusting problem of the diffuser blades of a traditional blade diffuser in non-design working condition point is effectively solved, and the efficiency of the diffuser is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of turbocharging, and in particular relates to a centrifugal compressor with a torsion spring self-adaptive variable geometry vane diffuser. Background technique [0002] The bladed diffuser of the centrifugal compressor can convert the high-speed airflow from the impeller into pressure energy from kinetic energy, so as to further increase the air pressure. But at non-design operating point, because the speed and direction of the impeller outlet airflow are different from the design operating point, if the installation angle of the diffuser blade remains unchanged, the efficiency of the diffuser will be significantly reduced. Therefore, it is necessary to design a vane diffuser with variable geometry, and adjust the angle of the diffuser vane according to the operating conditions of the centrifugal compressor. [0003] Existing vane diffusers with variable geometry often use active control methods, which re...

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Problems solved by technology

[0003] Existing vane diffusers with variable geometry often use active control methods, which require a complex mechanical structure to adjust the angle of the diffuser blades. Because the blade adjustment mechanism is too complicated, it often requires a large space, and when transient changes Slow response, unable to effectively improve diffuser efficiency

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