摘要:
A turbine blade cooling system for a gas turbine engine includes a turbine blade having a trailing edge, a concave side, and a convex side. The trailing edge defines at least one set of impingement holes each having a central longitudinal axis which is closer to a nearest portion of an edge of the blade at one of the concave and convex sides relative to a nearest portion of an edge of the blade at the other of the concave and convex sides. Alternatively or in addition to the foregoing, the trailing edge can define at least one set of impingement holes each having a central longitudinal axis which is angled in a direction of a flow of cooling medium toward one of the concave and convex sides relative to the other of the concave and convex sides.
摘要:
An article is provided, comprising a structure and a coating for minimizing thermal gradients in the structure. The coating includes a plurality of first layers of thermally conductive material, and a plurality of second layers of thermally conductive material. The first layers of thermally conductive material are less thermally conductive than the second layers at any particular temperature, and the layers are applied to the article such that the second layers of thermally conductive material are distributed amongst the first layers of thermally conductive material. Conduction of thermal energy through the layers to the structure is substantially impeded within the first layers, and substantially laterally dispersed within the second layers, thereby minimizing any thermal gradients within the structure.
摘要:
A drive axle assembly has a gear housing, two axle tubes extending outwardly of the gear housing, a lubricant reservoir in the gear housing and a gear assembly rotatably mounted in the gear housing that has a rotatable member that is partially disposed in lubricant in the lubricant reservoir. The drive axle assembly also has a lubricant cooling system that includes a lubricant passage in fluid communication with the lubricant reservoir via an inlet that is juxtaposed the rotatable member so that the level of lubricant in the lubricant passage is raised when the rotatable member rotates. The lubricant passage has elevated outlets that deliver lubricant to lubricant ducts disposed in the respective axle tubes when the lubricant in the lubricant passage rises above a predetermined level. The lubricant flows away from the gear housing in the lubricant ducts and returns to the reservoir along the interior of the axle tubes which cools the lubricant as it returns to the reservoir.
摘要:
A gas turbine engine, especially an industrial gas turbine engine for electrical power production, where a second compressor is used to supply a second compressed air at a higher pressure to a stage of stator vanes in the turbine section of the engine for cooling of the stage of stator vanes, and where the heated compressed air used to cool the stator vanes is then discharged into the combustor to be burned with a fuel and produce a hot gas stream that is passed through the turbine. an intercooler can be used with the second compressor to lower the temperature of the second compressed air used for cooling the stator vanes.
摘要:
A micro gas turbine engine in which the turbine rotor blades are formed as an integral bladed rotor with cooling air passages formed within the blades and the rotor disk by an EDM process. an adjacent stator vane includes an air riding seal with an air cushion supplied through the vanes to provide cooling, and where the air cushion is then passed into the turbine blades and rotor disk to provide cooling for the turbine blades. With cooling of the turbine blades, higher turbine inlet temperatures for micro gas turbine engines can be produced.
摘要:
Two pairs of ribs define three intermediate cooling chambers. Each rib in each pair extends parallel to the other rib in the pair. The ribs in a first pair are non-parallel to the ribs in a second pair. A first rib from the first pair is positioned spaced toward the leading edge. A first rib of the second pair is then serially positioned spaced toward the trailing edge. A second rib of the first pair is then positioned toward the trailing edge relative to the first rib in the second pair. A second rib in the second pair is then positioned toward the trailing edge relative to the second rib in the first pair.
摘要:
A gas turbine engine is provided with a turbine rotor disk having a plurality of disk slots which each receive a turbine blade. Cooling air is delivered into the disk slots, and flows into cooling air passages at a radially inner surface of the turbine blades. As known, the cooling air flows through the turbine blades to cool internal and external surfaces of the turbine blade. The disk slots are formed to have a greater cross-sectional area adjacent at the inlet end than at downstream locations. In this manner, the velocity of the air at the inlet end is reduced compared to the prior art, and pressure losses are minimized compared to the prior art.
摘要:
A differential having four pinions supported for rotation on cross pins within a differential case. The differential employs a retainer system for securing the cross pins relative to the differential case. The retainer system can include a collar and a plurality of pin members.
摘要:
A propeller shaft assembly includes a substantially cylindrical hollow propeller shaft, a stub shaft and a constant velocity joint having inner race and an outer race drivingly interconnected by a plurality of balls. The stub shaft has a first end fixed to the propeller shaft and a second end drivingly coupled to the inner race. The second end includes a portion positioned adjacent to the inner race that defines an outer diameter greater than an outer diameter defined by the interface between the inner race and the plurality of balls.
摘要:
A two speed drive system for an all wheel drive vehicle includes a double planetary gear front differential and a power take-off unit transferring drive torque to a front wheel set and a rear wheel set of the vehicle. A rear differential connects the power take-off unit and the rear wheel set providing the drive torque to the rear wheel set. A two speed drive unit is positioned between the power take-off unit and the rear differential. The drive unit shifts between a high range drive operation and a low range drive operation. The drive unit may be mounted directly to either the power take-off unit or the rear differential.