摘要:
This present invention relates to an axial-flow fan including a central hub connected with a driving shaft of a motor, and a plurality of blades extending radially along the circumference of the hub for blowing air toward an axial direction, the plurality of blades integrated with the hub into a single body, wherein assuming that a camber ratio at a blade root(cr1) of each blade is the value obtained by dividing a maximum camber value at the blade root into a chord length, a camber ratio at a blade tip(cr2) of each blade is the value obtained by dividing a maximum camber value at the blade tip into the chord length, and a percentage of decrease of the camber ratio is the value obtained by dividing a difference value between the camber ratio at the blade root(cr1) and the camber ratio at the blade tip(cr2) into the camber ratio at the blade root(cr1), the percentage of decrease of the camber ratio is in a range between 33% and 85%.
摘要:
A fan housing assembly includes a mounting base formed with a through hole thereon and a bushing. The bushing has a sleeve and is coupled to the mounting base by connecting the sleeve to the through hole. The mounting base and the bushing can be separately formed with predetermined materials in view of the different quality requirements before being assembled, thus resulting in lower manufacturing cost and enhanced flexibility in the fan design.
摘要:
A rotor assembly includes a housing and a hub. The housing has an open end and an opposed closed end, and is formed with a raised portion in the central location of the closed end. The hub is mounted on the closed end of the housing and covers the housing except for the raised portion to construct a thin motor.
摘要:
An apparatus for a serial ventilation device that increases airflow compared to conventional devices without increasing the size is presented. The first ventilator is mounted on the intake opening side of the serial ventilation device, with the front surface of its blades facing the air intake side. The second ventilator is mounted on the exhaust opening side of the serial ventilation device, with the front surface of its blades facing the air exhaust side. Thus a first ventilator, which ventilates from the rear side of the blades, and a second ventilator, which ventilates from the front side of the blades, operate when the ventilation side of the blades are facing the same direction and rotating in the same direction. Both ventilators are connected serially such that their rotation shafts are positioned in the same straight line, while the number of blades of the two ventilators are different.
摘要:
A casing section (30) for rotary apparatus (13, 14) of a gas turbine engine (10) is described. The casing section (30) comprises a partially circumferential casing member (32) and a plurality of radially inwardly extending vanes (34) fixed on the casing member (32).
摘要:
An exhaust-gas turbine for a turbocharger includes a rotor mounted rotatably in a turbine casing having a spiral inlet duct which is followed by an annular space surrounding the rotor. A guide-blade cascade is capable of being pushed axially into the annular space near the outer circumference of the rotor. The guide-blade cascade includes guide blades, is guided in an annular gap between an inner part and the turbine casing and is axially displaceable via an axial slide by a sliding sleeve. The guide-blade cascade with the axial slide, the inner part and/or the sliding sleeve are produced from an austenitic cast steel material having the following components: Cnull0.2%; Si 1.5-2.5%; Mnnull2.00%; Pnull0.045%; Snull0.03%; Cr 24.0-26.0%; Ni 19-22%; and Wnull5%.
摘要翻译:用于涡轮增压器的废气涡轮机包括可旋转地安装在具有螺旋入口管道的涡轮机壳体中的转子,其后面是围绕转子的环形空间。 引导叶片级联能够被轴向推入靠近转子外圆周的环形空间。 引导叶片级联包括导向叶片,在内部部分和涡轮机壳体之间的环形间隙中被引导,并且通过滑动套筒通过轴向滑动件可轴向移动。 具有轴向滑动件,内部部件和/或滑动套筒的导向叶片级联由具有以下部件的奥氏体铸钢材料制成:C <= 0.2%; Si 1.5-2.5%; Mn <= 2.00%; P <= 0.045%; S <= 0.03%; Cr 24.0-26.0%; 倪19-22%; W <= 5%。
摘要:
The invention relates to a fixed guide vane assembly comprising a circular casing composed of at least two parts (11) and supporting sectors (5), each composed of an inner segment (7) and an outer segment (6) connected by vanes (8). The parts of the casing and the sectors of the guide vane assembly are held together by a system forming a slide and a slider. Anti-rotation means (30) are provided to prevent the sectors from rotating with respect to the casing.
摘要:
In an axial flow hydraulic machine, a plural number of grooves 5 are formed on an inner surface of a casing, directed into a pressure gradient direction, for connecting between an inlet side of an impeller 1 and an inside of blade residing region on the casing inner surface. With movement of movable members 6 provided on the casing inner surface, the grooves appear within the blade residing region in an unstable operation region, while the grooves cause no interference with the blades of the impeller in a stable operation region.
摘要:
At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.
摘要:
A method of assembling a gas turbine engine includes coupling an inner engine casing to an outer engine casing such that an annular flow path is defined therebetween, coupling a plurality of circumferentially-spaced support struts between the inner and outer casings, and coupling a plurality of circumferentially-spaced outlet guide vanes within the flow path upstream from the support struts, such that a first circumferential spacing is defined between a first guide vane and a second guide vane, and a second circumferential spacing is defined between the second guide vane and a third guide vane. The guide vanes are arranged such that the second guide vane is between the first and third guide vanes and the second circumferential spacing is different from the first circumferential spacing.