Abstract:
用于要求优越的耐气蚀的应用场合中的流体转子。该转子具有用化学成份范围如下的可铸的亚稳定奥氏体钢合金制成的本体: C Mn N Si Ni Cr%最小 0.08 14.0 0.3 17.0%最大 0.12 16.0 0.45 1.0 1.0 18.5余量包括铁和杂质。该优选范围为17.5-18.5%铬、0.5-0.75%镍、0.45-0.55%硅、0.2-0.25%氮、15.5-16.0%锰及0.1-0.12%碳。定量试验显示出优于标准锅炉输送泵材料4-6倍的耐气蚀性能。还公开了制造耐气蚀的流体转子的方法。
Abstract:
Es wird ein Verfahren zur Frequenzveränderung einer Schaufel (9) vorgestellt, wobei die Schaufel aus einem Grundwerkstoff mit einem eine Saugseite (11), eine Druckseite, eine Eintrittskante (12), eine Austrittskante (13) und eine Schaufelspitze (14) aufweisenden Schaufelblatt (15) und einem Schaufelfuß (16) besteht. Im Bereich der Schaufelspitze (14) wird eine Ausnehmung (17) vorgesehen und in dieser Ausnehmung (17) wird ein Bauteil (18) aus einem nicht mit dem Grundwerkstoff identischen Material angebracht.
Abstract:
A gas turbine engine has a compressor section including a lower pressure compressor and a higher pressure compressor, and a turbine section. A core engine housing surrounds the compressor section and the turbine section. An outer intermediate housing wall defines an internal chamber between the core housing and the outer intermediate housing. A fan rotor and a fan casing surround the fan rotor to define a bypass duct between the fan case and the outer intermediate housing. A heat exchanger is mounted in the internal chamber and receives high pressure air for cooling the high pressure air and delivering the high pressure air into the core engine housing to be utilized as cooling air for a component. Air from the lower pressure compressor is utilized to cool the higher pressure air in the heat exchanger.
Abstract:
The invention relates to a high-pressure compressor of a gas turbine having at least one blisk, specifically a disk with a plurality of blades that are disposed on the disk, wherein the blisk has at least one titanium material from the group that comprises Ti-6246 and Ti-6242, wherein the materials of the disk and the blades of the blisk differ in their chemical composition and/or their microstructure. The blades are welded to the disk, in particular, by means of a pressure welding method supported by high-frequency current, whereby the current is conducted through the joint surfaces and leads to local limited melting therein.
Abstract:
A dry vacuum pump comprises a stator component and at least one rotor component. To improve the tolerance of the pump to corrosive gases passing through the pump, the stator component and/or said at least one rotor component are formed from silicon-molybdenum (SiMo) ductile iron.
Abstract:
A solid-solution strengthened superalloy weld composition, includes: about 10 to about 15 wt % Co; about 18 to about 22 wt % Cr; about 0.5 to about 1.3 wt % Al; about 3.5 to about 4.5 wt % Ta; about 1 to about 2 wt % Mo; about 13.5 to about 17.0 wt % W, up to about 0.08 wt % C; up to about 0.06 wt % Zr; up to about 0.015 wt % B; about 0.4 to about 1.2 wt % Mn; about 0.1 to about 0.3 wt % Si; and balance Ni.
Abstract:
A fluid impeller for us in applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a preferred chemical composition in the range of 17.5-18.5% chromium, 0.5-0.75% nickel, 0.45-55% silicon, 0.2-0.25% nitrogen, 15.5-16.0% manganese and 0.1%-0.12% carbon. Quantitative testing has shown cavitation resistance of four to six times that of standard boiler feed pump materials. A method for making cavitation resistant fluid impellers is also disclosed.
Abstract:
A rotary internal combustion engine includes a rotor housing having a peripheral wall circumscribing a rotor cavity and a rotor disposed within the rotor cavity. A side housing is secured to the rotor housing and a plate defines a seal running surface for the rotor. The plate is disposed between a portion of the side housing and the rotor housing and at least one shim is disposed between the plate and the side housing for spacing the plate apart from contact with the side housing.