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    • 1. 发明申请
    • Turbine blade attachment lightening holes
    • 涡轮叶片附件减光孔
    • US20050158174A1
    • 2005-07-21
    • US10761766
    • 2004-01-21
    • Tom BrooksRichard SeleskiThomas ChurbuckThomas Brew
    • Tom BrooksRichard SeleskiThomas ChurbuckThomas Brew
    • F01D5/14F01D5/18B63H1/14
    • F01D5/147F01D5/18
    • The present invention seeks to provide a turbine blade with increased creep capability for both uncooled and cooled turbine blades while generally maintaining operating stress levels at an interface region between the turbine blade and a turbine disk. A turbine blade is disclosed having an attachment, a neck, a platform, and an airfoil. Extending radially outward from the attachment, through the neck, and terminating radially inward of the platform is a plurality of first cavities. The turbine blade in accordance with the preferred embodiment of the present invention is cast from a high density nickel base alloy with high temperature capability and improved creep capability. A plurality of first cavities are placed in the attachment and neck region to reduce excess weight of the turbine blade due to the higher density, greater creep capable alloy. Reducing the weight of the blade in this region provides increased creep capability in the turbine blade airfoil while maintaining operating stress levels.
    • 本发明寻求提供一种涡轮叶片,其具有对未冷却和冷却的涡轮机叶片具有增加的蠕变能力,同时通常维持在涡轮机叶片和涡轮盘之间的界面区域处的操作应力水平。 公开了一种具有附件,颈部,平台和翼型的涡轮叶片。 从附件径向向外延伸穿过颈部并且从该平台的径向向内延伸的是多个第一腔。 根据本发明的优选实施例的涡轮叶片由具有高温能力和改进的蠕变能力的高密度镍基合金铸造。 多个第一腔被放置在附接和颈部区域中,以便由于较高的密度,较大的可蠕变的合金而减少涡轮叶片的重量。 在该区域中减小叶片的重量在涡轮叶片翼型件中提供增加的蠕变能力,同时保持操作应力水平。
    • 7. 发明授权
    • Converter with lossless snubbing components
    • 转换器与无损缓冲组件
    • US4566059A
    • 1986-01-21
    • US516146
    • 1983-07-21
    • George C. GalliosDerek WhiteheadRichard Seleski
    • George C. GalliosDerek WhiteheadRichard Seleski
    • H02M7/5387H02M3/335
    • H02M7/5387Y02B70/1441
    • The inverter includes a DC to AC converter circuit including a plurality of transistors which are switched on and off to convert a DC signal into an AC signal. The converter circuit also includes diodes which are alternately forward and reverse biased during the operation of the converter circuit, the diode having a reverse recovery period whenever the diode is switched from a forward to a reverse biased condition during which the reverse resistance of the diode is substantially zero. An inductor is connected to the diode for limiting the current through the diode during the reverse recovery period such that shoot through currents which pass through both the diode and the inductor are limited to desired levels.
    • 逆变器包括DC至AC转换器电路,其包括多个晶体管,其被接通和关断以将DC信号转换成AC信号。 转换器电路还包括在转换器电路的操作期间交替地正向和反向偏置的二极管,二极管每当二极管从正向转换到反向偏置状态时具有反向恢复周期,在二极管期间二极管的反向电阻为 基本为零。 电感器连接到二极管,用于限制在反向恢复周期期间通过二极管的电流,使得通过二极管和电感器的穿通电流被限制到期望的电平。