Turbo-expansion valves, turbochargers and turbojets with spiral energy recovery and flow pre-rotation

摘要

A volute comprises an axial opening and a tangential or radial opening. The volute is located upstream of a fluid compressor or marine propeller, or downstream of a fluid turbine. When used with a fluid compressor or marine propeller the volute pre-rotates the fluid before it enters the compressor or marine propeller. When used with a turbine the volute de-rotates the fluid after it leaves the turbine. When used with a turbine, the volute includes an inlet 5 which accepts spirally rotating fluid 1, a bell mouth portion 3, a volute portion 2, and a tangential or radial outlet 4 which emits a linear fluid flow 6. Annular turning devices may be used to pre-rotate or de-rotate the fluid flow. The volute may be double-width with an axial opening on each side. Up to eight volutes may be used together such that they share a common tangential opening, but have multiple axial openings. The volute may be used in a turbo-charger.