Axial flow compressor
US5117629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1991 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Sep 25, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/522
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An axial flow compressor with an inner casing and an outer casing. The inner casing has bleed apertures. The outer casing is provided with loading devices which are positioned adjacent to the bleed apertures such that the loading devices apply loads on the inner casing in the vicinity of the bleed apertures. Components of the loads applied by the loading devices are arranged to oppose and preferably balance any loads applied on the inner casing due to the bleed apertures' releasing the pressure differential across the inner casing. The loading devices comprise cylinders secured to the inner casing and pistons secured to the outer casing to form chambers. The chambers are supplied with fluid at a predetermined pressure. The loading devices oppose undesirable local reductions in clearance between static shrouds and the rotor blades. In one embodiment, the pressure inside the inner casing is a relatively high pressure, the pressure between the inner and outer casings is a lower pressure, and the predetermined pressure supplied to the chambers of the loading devices is a still lower pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.