GB594307A - - Google Patents

Abstract

594,307. Centrifugal compressors. MEISSER, C. Dec. 8, 1944, No. 24596. Convention date, Dec. 11, 1943. [Class 110 (i)] In a helico-centrifugal compressor, the blade angle to the peripheral direction increases from the inlet through a first zone E, Fig. 2, and thereafter through a second zone F decreases to a minimum at the outlet where the cosine of the blade angle is greater than Vr/2Á The rotor may be made in two parts 12, Fig. 4, corresponding to the two zones and the part 12 of the zone E may be built up of several discs. A fairing 5 is secured to the inlet end of the rotor, Fig. 4. The blading may be continuous through the two zones, or, the blades in the zone E may be of aerofoil cross-section and of a different number from those in zone F. In a construction having the rotor part 12 made of three discs, the bladings may be such as shown in Fig. 8 and the inlet end of the rotor may have a bearing in a part forming an inlet fairing integral with the casing. The inlet part 12 of the rotor may be made interchangeable so that the compressor may be adapted to different working conditions by changing the inlet part of the rotor. The inlet part may be a casting or built up by welding blades to a hub or a pressing in a plastic. The blades in the inlet part may be angularly adjustable while at rest or during running. Specification 567,368 is referred to.