Abstract:
A reciprocating gas compressor is described operating according to an extended cycle of 4, 6 or more strokes, wherein the first two strokes are sequential induction and compression strokes using a low pressure gas as working fluid and compressing it to a high pressure gas, and the remaining strokes are pairs of sequential filling and emptying strokes using more of the low pressure gas as heat transfer fluid for transferring heat from inside the gas compressor to outside the gas compressor. The gas compressor also contains an in-cylinder heat regenerator for absorbing heat from the compressed gas and releasing heat to the heat transfer fluid thus achieving near-isothermal compression. Using parallel principles, a reciprocating gas expander is also described for achieving near-isothermal expansion. Also described are reciprocating machines using the near-isothermal gas compressor and near-isothermal gas expander in combination according to the Ericsson heat engine cycle, the Stirling heat engine cycle and the Stirling refrigeration cycle.
Abstract:
A method for manufacturing titanium alloy turbine blades comprising the steps of (a) forming turbine blades of titanium alloy through hot forging or machine processing, (b) cooling leading sides of leading edge portions of the turbine blades formed through hot forging or machine processing including covers thereof earlier than blade main bodies after final hot forging or solution heat treatment and (c) heat treating the cooled turbine blades. With this method, it is possible to manufacture titanium alloy turbine blades in an economical fashion and obtain titanium alloy turbine blades superior in reliability by preventing erosion.
Abstract:
A liquid pumping, handling and spraying system for liquid compositions and especially those liquid coating compositions having a suspension of metal particulate therein which tends to settle out of suspension of metal particulate therein which tends to settle out of suspension quite rapidly and which includes metal particulate having an affinity for adherence to metal surfaces. A fluid supply system is provided which accomplishes continuous agitation of the liquid composition to be sprayed to maintain the metal particulate thereof in properly entrained suspension and even distribution with the liquid carrier fluid and which permits the use of low cost, lightweight containers for the liquid supply. A packingless pump is provided for pressurized delivery of the liquid composition from the supply container to a packingless spray gun. The packingless pump achieves pumping of liquid by hydro mechanical deformation of polymer variable volume pump chambers which induce intermittent suction and pressurization of the liquid for pumping and which have externally mounted check valve heads for controlling the flowing of the pumped liquid from the supply container to the spray gun. The packingless spray gun employs a body of resilient polymer which functions as a columnar spring (248) to control the opening and closing movement of a spray valve assembly. Valve seats (228) of the check valve head and spray gun assembly may be of flexible nature to ensure efficient separation of metal particulate therefrom. Metal operational components of the check valve head and spray gun, such as valve stems and valves define outer surfaces composed of titanium to minimize metal particulate adherence thereto.
Abstract:
A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and a plurality of semispherical shoes 4 sliding on the swash plate 3. The semispherical shoe 4 is formed of a ferrous material, and the swash plate 3 is manufactured using high-strength brass as a material. On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7' are formed by laser hardening, and a lubricating oil passage 10' consisting of a reticular concave part is also formed. Thereby, the sliding device 1 having excellent seizure resistance as compared with the conventional sliding device can be provided.
Abstract:
In the context of the invention, a housing (3, 5) for a motor or compressor has been developed which has an elongate crankcase (31) with two end surfaces (31a, 31b). Furthermore, at least one cylinder chamber (32a, 32b) is provided in which a piston is caused to perform a movement by rotation of the crankshaft. The internal diameter of the crankcase narrows monotonously from the first end surface to the second end surface. A crankcase shaped in this way can be manufactured particularly easily by virtue of the casting being performed around a shaping mandrel (34). A shaping mandrel of said type must likewise narrow monotonously in order that, after the casting has been performed around it, said shaping mandrel can be pulled out of the housing at a first end. It would not be possible for crankcases in the form of a straight cylinder to be produced using this simple method. By way of the shaping of the crankcase according to the invention, it is possible for the housing to be of unipartite and at the same time very compact construction.
Abstract:
Trochoide (1), sowie ihr Herstellungsverfahren, für einen Rotationskolbenmotor (3), insbesondere für den Einsatz in Luftfahrzeugen. Die Trochoide (1) ist dabei ausgeführt, zusammen mit einem Läufer (5), Arbeitsräume (7) zum Komprimieren und Zünden eines Brennstoffs bereitzustellen. Des Weiteren weist die Trochoide (1) eine Leichtmetalllegierung (9) auf und ist mittels eines generativen Schichtfertigungsverfahrens gefertigt.
Abstract:
A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and a plurality of semispherical shoes 4 sliding on the swash plate 3. The semispherical shoe 4 is formed of a ferrous material, and the swash plate 3 is manufactured using high-strength brass as a material. On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7' are formed by laser hardening, and a lubricating oil passage 10' consisting of a reticular concave part is also formed. Thereby, the sliding device 1 having excellent seizure resistance as compared with the conventional sliding device can be provided.
Abstract:
The blade structure of a wind turbine is provided which has enough strength for sporadic large load and increased durability. The blade can be formed into a thinner blade profile, with which blade performance is improved, increased efficiency of the wind turbine is attainable, and the noise induced by Karman vortex street is reduced. The blade is made of metal and formed into a one-piece blade or a split-type blade consisting of a main blade body made of metal and a rear end member made of metal other than that of said main blade body, the rear end member being fixed to the rear end of said main blade body, dentation being formed in the trailing edge part of the blade along the length thereof, the dentation being shaped in a serration of triangular tooth, of trapezoid tooth, or of sawtooth, the ratio(h/δ) of the tooth height h to the thickness δ of the boundary layer developed on the surface of the blade is: h/δ = 1.0 ∼ 10.0, and the ratio (h/p) of the tooth height h to the pitch p is: h/p = 0.5 ∼ 5.0.
Abstract:
A compressor used in a refrigerating cycle, wherein the bottom face side of a connected portion between the bottom surface and the inner peripheral surface of a housing is formed in an R-shape and the inner peripheral surface side thereof is formed in a tilted shape or an R-shape, and a tough material having a tensile strength of 800 N/mm or higher at the room temperature is used for at least one of those parts forming the housing and an internal mechanism, whereby the wall thickness of component parts can be designed thin while assuring the strengths thereof by properly selecting the materials used for the component parts and improving the shape of the housing so that the overall size, weight, and cost of the compressor can be reduced.
Abstract translation:1.一种冷冻循环用压缩机,其特征在于,底面与壳体内周面的连接部的底面侧形成为R字状,其内周面侧形成为倾斜状,或者 R形和在室温下具有800N / mm 2或更高拉伸强度的韧性材料用于形成壳体和内部机构的那些部件中的至少一个,由此组件的壁厚 可以通过适当选择用于构件的材料并改善壳体的形状来确保其强度,同时确保其强度,从而可以减小压缩机的整体尺寸,重量和成本。
Abstract:
A process for detecting an aluminum-based material deposited onto a titanium-based gas turbine engine component during engine operation is disclosed. The process comprises immersing at least a portion of the titanium-based component, which has been subjected to engine operation, into an acid solution to form an etched component. The acid solution comprises sodium fluoride, sulphuric acid and water. The etched component may then be removed from the solution and visually inspected for dark areas in contrast to light areas, the dark areas indicating deposited aluminum-based material.