摘要:
A compressor airfoil of a turbine engine having a geared architecture includes pressure and suction sides extending in a radial direction from a 0% span position to a 100% span position. The airfoil has a relationship between a tangential trailing edge position and span position that defines a curve with a non-positive slope from 90% span to 100% span. The non-positive slope corresponds to a pressure side-leaning trailing edge.
摘要:
Titanium alloys formed into a part or component used in applications where a key design criterion is the energy absorbed during deformation of the part when exposed to impact, explosive blast, and/or other forms of shock loading is described. The titanium alloys generally comprise a titanium base with added amounts of aluminum, an isomorphous beta stabilizing element such as vanadium, a eutectoid beta stabilizing element such as silicon and iron, and incidental impurities. The titanium alloys exhibit up to 70% or more improvement in ductility and up to a 16% improvement in ballistic impact resistance over a Ti-6Al-4V alloy, as well as absorbing up to 50% more energy than the Ti-6Al-4V alloy in Charpy impact tests. A method of forming a part that incorporates the titanium alloys and uses a combination of recycled materials and new materials is also described.
摘要:
The present invention provides a method of designing a manufacturing geometry for a tip portion (28) of a rotary blade (25) for a gas turbine engine. The method comprises first devising a theoretical hot running geometry of the tip portion at a specified design condition. Next, the theoretical operational forces acting on the theoretical hot running geometry at the specified design condition are calculated e.g. using CFD software. Then, the manufacturing geometry is determined (e.g. using FEA analysis) using the calculated theoretical operational forces. The specified design condition is selected as an engine running condition at which the radial growth and twist of the rotary blade is maximum. The manufactured tip portion of the rotary blade has a convex profile along the camber line in a cold condition, wherein the spacing between the casing (24) and the tip portion (28) is constant along the camber line at a hot running condition.
摘要:
An in-line blower (10) having a housing (12) with a substantially straight airflow path. A motor (24) and fan (25) are positioned within the airflow path, below the handle (14) of the blower (10). A battery (22) powers the motor (24), and is located below the housing (12) so that the handle (14), motor (24) and fan (25), and the battery (22) are vertically aligned so the weight of the blower (10) is aligned with the handle (14), and reduces moment forces acting thereon.
摘要:
Ein Blasgerät besitzt ein Blasrohr (5) und eine Gebläseeinheit (13), die einen Luftstrom durch das Blasrohr (5) fördert. Die Gebläseeinheit (13) besitzt ein Gebläse (30, 30') mit einer Gebläseachse (19). Das Gebläse (30, 30') ist ein den Luftstrom in Richtung der Gebläseachse (19) förderndes Gebläse (30, 30'). Der Luftstrom strömt an einer Blasrohröffnung (24) in einer Ausströmrichtung (25) aus dem Blasrohr (5) aus. Das Blasgerät besitzt einen Handgriff (3), der eine dem Gebläse (30, 30') zugewandte Unterseite (22) besitzt. An seiner Unterseite (22) besitzt der Handgriff (3) einen Griffpunkt (12), der in Arbeitslage (10) des Blasgeräts (1) auf einer vertikalen Achse (29) durch den Schwerpunkt (17) des Blasgeräts (1) liegt. Die Blasrohröffnung (24) besitzt eine in Ausströmrichtung (25) ausgerichtete Mittelachse (9). Um im Betrieb geringere vom Bediener aufzunehmende Kräfte am Handgriff (3) zu erreichen, ist vorgesehen, dass der Abstand (a) der Mittelachse (9) der Blasrohröffnung (24) zum Griffpunkt (12) kleiner ist als der Abstand (b) der Gebläseachse (19) zum Griffpunkt (12).
摘要:
The present invention concerns a turbomachine part (1) comprising at least first and second blades (3, 31, 3E), and a platform (2) from which the blades (3, 31, 3E) extend, characterised in that the platform (2) has a non-axisymmetric surface (S) limited by first and second end planes (PS, PR), and defined by at least three construction curves (PC-A, PC-C, PC- F) of class C1 each representing the value of a radius of said surface (S) on the basis of a position between the lower surface of the first blade (31) and the upper surface of the second blade (3E) according to a plane substantially parallel to the end planes (PS, PR), including: - a first curve (PC-C) that increases in the vicinity of the second blade (3E); - a second curve (PC-F) disposed between the first curve (PC-C) and a trailing edge (BF) of the first and second blades (3, 31, 3E), and that decreases in the vicinity of the second blade (3E); - a third curve (PC-A) disposed between the first curve (PC-C) and a leading edge (BA) of the first and second blades (3, 31, 3E), and having a minimum at the second blade (31).
摘要:
A mounting system for a gas turbine engine includes a compressor case portion, an inlet frame, an outlet frame, and a mounting structure. The compressor case portion houses rotatable compressor blades. The inlet frame connects to an inlet end of the compressor case. The outlet frame connects to an outlet end of the compressor case portion at an end opposite the compressor case inlet end. An axially fore mounting structure of the mounting structure connects to the inlet frame. An axially aft mounting structure of the mounting structure connects to the outlet frame. A bridging structure of the mounting structure is offset from the compressor case and connects the fore and aft mounting structures, thereby bridging engine loads across the inlet and outlet frames to reduce load induced distortion of the compressor case portion.