摘要:
A spring guide for use in a seal housing including a first body portion, a second body portion, and a flange portion, including a flange width, extending circumferentially between the first body portion and the second body portion. The flange width being less than or equal to approximately 2.1 millimeters.
摘要:
The invention relates to a method for testing an overspeed protection apparatus of a single-shaft system (1) having a gas turbine (2), a generator (4) and a steam turbine (3), wherein the method has the following steps: a) operating the single-shaft system (1) at the nominal speed thereof and under an electrical load connected to the generator (4), wherein the load is selected to be low enough that, after dropping the load, the speed of the single-shaft system (1) rises such that the speed remains below a steam turbine threshold speed which is lower than a gas turbine threshold speed, wherein the overspeed protection device is configured such that a first overspeed protection is triggered as soon as the speed of the steam turbine (3) reaches the steam turbine threshold speed, and a second overspeed protection is triggered as soon as the speed of the gas turbine (2) reaches the gas turbine threshold speed; b) dropping the load; c) increasing the mass flow of the steam introduced into the steam turbine (3) and/or of the fuel introduced into the gas turbine (2) such that the speed of the steam turbine (3) reaches the steam turbine threshold speed; d) testing whether the first overspeed protection is triggered.
摘要:
A method and a device for power extraction by means of an axial fluid machine, in an annulus tube comprising at least a rotatable inner wall (308, 408, 501) and/or a rotatable outer wall (409, 502) over which a swirling fluid is flowing with a velocity (420). According to this method, the said fluid creates tangential force (417) on at least one of said rotatable walls (308, 408, 501 and 502) of the axial fluid machine and creates power of that said shaft (309, 414, 505 and/or 506).
摘要:
A gas turbine engine comprises a fan drive turbine. The fan drive turbine drives the fan through a gear reduction; A change in enthalpy is defined across the gas turbine engine. The change in enthalpy divided by a speed of the fan drive turbine squared is less than or equal to about 1.8. An axial component of gases approaching an upstream most blade of the fan drive turbine divided by the speed of the fan drive turbine is equal to or less than about 0.9.
摘要:
A control system for turbofan engine includes a first sensor measuring rotation of a first shaft at a first location and a fan shaft sensor measuring a speed of a fan shaft. A controller utilizes measurements of a first speed of the first shaft from the first sensor and a second speed of the fan shaft driven by a geared architecture and rotating at a speed different than the first shaft. The controller determines that one of the first shaft and the fan shaft are outside predetermined deformation limits responsive to a difference between an actual difference between the first and second speeds and a calculated expected difference between speeds of the first shaft and the fan shaft.
摘要:
L'invention concerne un dispositif de protection contre des fuites d'huile vers les rotors d'une turbine (2) de turbomachine, comprenant une cavité amont (18) dans laquelle peut circuler un mélange air/huile, ladite cavité amont étant délimitée à l'aval par un tourillon (8) du rotor de turbine et à l'extérieur par une bride d'étanchéité (14) du tourillon s'étendant axialement vers l'amont, une cavité aval (20) s'ouvrant vers les disques (12) de la turbine et communiquant avec la cavité amont par une pluralité de trous de ventilation (22) pratiqués dans le tourillon, et un déflecteur annulaire amont (24) fixé sur la bride d'étanchéité du tourillon et s'étendant radialement vers l'intérieur en direction des trous de ventilation, le déflecteur amont présentant des orifices de passage d'huile (26) pratiqués au niveau de son extrémité fixée sur la bride d'étanchéité du tourillon.
摘要:
The connection arrangement comprises a shaft (3) having an axial through hole (12), a tie rod (4) located inside the axial through hole (12), an impeller (2) comprising a solid hub, a plurality of blades, and an integral stub protruding axially from the solid hub; at an end of the tie rod (4) there is an integral body (11) having a shape radially protruding from the tie rod (4); the stub has a cavity (10) for receiving the body (11) and an axial hole for inserting the body (11) into the cavity (10); the stub axial hole has a shape corresponding to the shape of the body (11); the cavity (10) is so sized and shaped as to allow rotation of the body (11) inside the cavity (10) and trapping (8) of the body (11) in the cavity (10) once rotated; the shaft (3) and the impeller (2) are coupled together by a coupling (6); the trapping (8) allows transmission of axial load between the tie rod (4) and the impeller (2); the coupling (6) allows transmission of torque between the shaft (3) and the impeller (2).
摘要:
A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a fan section, a shaft including a bearing system, a turbine section in communication with the shaft, a speed change mechanism coupling the fan section to the turbine section and a biasing device configured to apply a biasing force against the shaft.
摘要:
A pump system for a gas turbine engine has at least one pump. At least one valve has an outlet and at least one inlet is fluidly connected to the at least one pump. A geared architecture is positioned within a bearing compartment. The geared architecture is configured to receive lubricating fluid from the outlet of the at least one valve, a self- cleaning filter is positioned downstream of the at least one valve and upstream of the geared architecture. A gas turbine engine and a method are also disclosed.
摘要:
La présente invention concerne un dispositif d'étanchéité (1 ) inter-arbres coaxiaux d'une turbomachine, ledit dispositif comportant; un segment élastique (4) présentant, une ouverture centrale (5) circulaire permettant une liaison glissière avec un arbre interne (1 ), une surface externe (6) adaptée pour coopérer avec une surface interne (7) d'une portion (P) d'un arbre externe (3), deux moyens de maintien (8, 9) situés de part et d'autre dudit segment élastique (4) et autorisant un jeu axial dudit segment élastique (4), ledit dispositif étant caractérisé en ce que le segment élastique (4) est un profilé.