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公开(公告)号：US6164886A
公开(公告)日：2000-12-26
申请号：US382021
申请日：1999-08-24
CPC分类号： F16B39/105 , G21C5/10 , Y02E30/40 , Y10S411/972
摘要： A high strength bolt fastens a baffle plate and a former plate of a pressurized water nuclear reactor pressure vessel together. The bolt has a head portion and an integral locking member extending from the head portion for engaging one of the structural members to lock the bolt with the structural member. The integral locking member portion has a lower yield stress than the yield stress of the shank. A lower yield stress may be obtained by selective annealing. The locking member is less susceptible to stress corrosion cracking in high temperature, high pressure water of commercial nuclear power reactors.
摘要翻译： 高强度螺栓将压力水核反应堆压力容器的挡板和前板固定在一起。 螺栓具有头部和从头部延伸的一体的锁定构件，用于与结构构件中的一个接合以将螺栓与结构构件锁定。 一体的锁定构件部分具有比柄的屈服应力低的屈服应力。 通过选择性退火可以获得较低的屈服应力。 商业核反应堆的高温，高压水中的锁定构件较不易受应力腐蚀开裂的影响。
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2.发明授权Apparatus and method for minimizing differential thermal expansion of gas turbine vane structures 失效用于最小化气体涡轮机结构的差异热膨胀的装置和方法
公开(公告)号：US5098257A
公开(公告)日：1992-03-24
申请号：US580060
申请日：1990-09-10
CPC分类号： F01D5/18 , F05D2240/81
摘要： An apparatus and method are provided for minimizing differential thermal expansion in external cooling air structures formed on the shrouds of the vane segments of a gas turbine. The external cooling air structure is formed from a laminate comprised of two layers joined in sandwich-like fashion. A passageway, which may be of a serpentine arrangement, is formed between the two layers of the laminate. Hot gas flowing over the shroud is directed through the passageway, thereby heating the structure so that its temperature is close to that of the shroud. Cooling air is bled into the hot gas directed to the passageway so as to reduce the temperature of the hot gas flowing through the passageway and prevent overheating of the external cooling air structure.
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