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    • 41. 发明授权
    • Gas turbine moving blade
    • 燃气轮机动叶片
    • US06481967B2
    • 2002-11-19
    • US09790975
    • 2001-02-23
    • Yasuoki TomitaYukihiro HashimotoKiyoshi SuenagaHisato ArimuraShunsuke ToriiJun KubotaAkihiko ShirotaSunao AokiTatsuo Ishiguro
    • Yasuoki TomitaYukihiro HashimotoKiyoshi SuenagaHisato ArimuraShunsuke ToriiJun KubotaAkihiko ShirotaSunao AokiTatsuo Ishiguro
    • F01D518
    • F01D5/20F01D5/186F01D5/187F05D2240/81F05D2250/185F05D2260/22141
    • A gas turbine moving blade is provided which prevents occurrence of cracks caused by thermal stresses due to temperature differences between a blade and a platform while the gas turbine is being stopped. During steady operation time of the moving blade, cooling air enters cooling passages to flow through other cooling passages for cooling the blade, and then to flow out of the blade. A recessed portion having a smooth curved surface is provided in the platform near a blade fitting portion on the blade trailing edge side. A fillet of the blade fitting portion on the blade trailing edge side has a curved surface with curvature larger than that of a conventional blade fitting portion. A hub slot below the fillet, for blowing air, has a cross sectional area larger than other slots of the blade trailing edge. A thermal barrier coating is applied to the blade surface. By the above construction, thermal stresses due to temperature differences between the blade and the platform during gas turbine stoppage are made smaller and occurrence of cracks is prevented.
    • 提供了一种燃气轮机动叶片,其防止在燃气轮机停止时由于叶片和平台之间的温度差引起的热应力的发生。 在运动叶片的稳定运行时间内,冷却空气进入冷却通道,流过其它冷却通道,以冷却叶片,然后流出叶片。 具有光滑曲面的凹部在叶片后缘侧的叶片嵌合部附近设置在平台上。 叶片后缘侧的叶片嵌合部的圆角具有比现有的叶片嵌合部曲率大的曲率的曲面。 在圆角下方的用于吹送空气的轮毂槽的横截面积大于叶片后缘的其它槽。 将热障涂层施加到叶片表面。 通过上述结构,使得在燃气轮机停止期间由于叶片和平台之间的温度差导致的热应力变小,并且防止了裂纹的发生。
    • 43. 发明授权
    • Gas turbine blade
    • 燃气轮机叶片
    • US06257830B1
    • 2001-07-10
    • US09230983
    • 1999-06-02
    • Masaaki MatsuuraKiyoshi SuenagaSunao AokiKazuo UematsuHiroki FukunoYasuoki Tomita
    • Masaaki MatsuuraKiyoshi SuenagaSunao AokiKazuo UematsuHiroki FukunoYasuoki Tomita
    • F01D518
    • F01D5/147F01D5/187F05D2260/2322
    • In a steam cooling system proposed heretofore, high-pressure steam is supplied into an internal space of a blade for effecting cooling thereof with the high-pressure steam to thereby recover heat energy. This system however suffers from problems concerning the strength of the blade and the like. The present invention solves these problems and provides a gas-turbine blade which does not suffer from problems concerning the strength thereof nor problems concerning the flow of high-pressure steam. To this end, a coolant flow passage is formed within the blade extending in the longitudinal direction of the blade, and reinforcing ribs which interconnects a dorsal wall and a ventral wall of the blade is disposed within the coolant flow passage so as to extend in the flow direction of the coolant. Hence, the strength of the blade can be ensured without any obstacle to the flow of the coolant.
    • 在迄今为止提出的蒸汽冷却系统中,将高压蒸汽供应到叶片的内部空间中,以利用高压蒸汽冷却,从而回收热能。 然而,该系统存在关于叶片等的强度的问题。 本发明解决了这些问题,提供了一种不存在与强度相关的问题的燃气轮机叶片,也不会涉及高压蒸汽的流动问题。 为此,在刀片的纵向延伸的叶片内形成冷却剂流动通道,并且将与叶片的背壁和腹壁相互连接的加强筋设置在冷却剂流动通道内,以便在 冷却液的流动方向。 因此,可以确保叶片的强度,而不会妨碍冷却剂的流动。
    • 44. 发明授权
    • Steam-cooling type gas turbine
    • 蒸汽式燃气轮机
    • US06224327B1
    • 2001-05-01
    • US09250733
    • 1999-02-16
    • Sunao AokiKatsunori TanakaKazuharu HirokawaRintaro Chikami
    • Sunao AokiKatsunori TanakaKazuharu HirokawaRintaro Chikami
    • F04D2958
    • F01D5/085F02C7/16F05D2260/2322
    • A steam-cooling gas turbine in which cooling steam is fed from a center portion of a rotating shaft and recovered through passages disposed at the outer side of the center portion with steam leaking through a seal portion from a feeding steam being effectively recovered. Feed steam (30) serving as coolant is supplied to a cavity (27) from a inner cylinder (10) and hence fed to moving blades (11, 12) through recesses (40) formed in a coupling portion (26) interposed between a final-stage disk (24) and a turbine shaft (1), steam feeding pipes (15) and steam feeding passages (11a, 12a). After cooling of the moving blades, steam (31) is recovered through steam recovering passages (11b, 12b), steam recovering pipes (16), radial steam-recovering passages (17), axial steam-recovering passages (18) and outlet openings (5a). The coupling portion (26) is forced to hermetically close under thermal stress, whereby leakage of the feed steam (30) is prevented. Steam leaking through a seal portion constituted by stationary and rotatable seal fin assemblies (4a, 4b) can be effectively recovered. The inner cylinder (10) can move in the axial direction through cooperation of piston rings (43) and a centering piece (6) adapted for absorbing thermal stress induced in the inner cylinder (10). Upstream tip end portions of steam feeding pipes (15) and steam recovering pipes (16) are secured onto a side surface of the first-stage disk (21) through sleeves removably fitted thereto.
    • 一种蒸汽冷却燃气轮机,其中冷却蒸汽从旋转轴的中心部分进给并通过设置在中心部分的外侧的通道被回收,蒸汽通过密封部分从进料蒸汽泄漏得到有效回收。 作为冷却剂的进料蒸汽(30)从内筒(10)供给到空腔(27),从而通过形成在连接部分(26)中的连接部分(26)的凹部(40)供给到活动叶片(11,12) 末级盘(24)和涡轮轴(1),蒸汽供给管(15)和蒸汽供给通道(11a,12a)。 在运动叶片冷却后,蒸汽(31)通过蒸汽回收通道(11b,12b),蒸汽回收管(16),径向蒸汽回收通道(17),轴向蒸汽回收通道(18)和出口 (5a)。 耦合部分(26)在热应力下被迫气密地闭合,从而防止进料蒸汽(30)的泄漏。 可以有效地回收通过由固定和可旋转的密封翅片组件(4a,4b)构成的密封部分泄漏的蒸汽。 内筒(10)可以通过活塞环(43)和适于吸收在内筒(10)中感应的热应力的定心件(6)的配合而沿轴向移动。 蒸汽供给管(15)和蒸汽回收管(16)的上游末端部分通过可移除地装配在其上的套筒固定在第一级盘(21)的侧表面上。
    • 47. 发明授权
    • Gas turbine tip shroud blade cavity
    • 燃气涡轮机顶端护罩叶片腔
    • US6068443A
    • 2000-05-30
    • US23566
    • 1998-02-13
    • Sunao AokiEisaku Ito
    • Sunao AokiEisaku Ito
    • F01D5/20F01D5/22F01D11/02F01D11/08F02C7/28
    • F01D5/225F01D11/08
    • The invention relates to a cavity constituted by a casing of a gas turbine and a moving blade with a tip shroud, by which a cavity space is made to a necessary minimum size, a main flow gas is prevented from being entrained and a pressure loss is reduced. A tip shroud (6) is mounted on a tip end portion of a moving blade (4), a fin (7) is mounted thereon, a recess-like cavity (15) narrower than the conventional one is formed by portions (12a) and (12b) of a casing (12) and the fin (7), and further a projecting portion (16) is provided to an upstream end portion of the tip shroud (6). The projecting portion (16) is at a position (13a) at a time of a cold start and is at a position (13b) at a time of a hot start run, even if a thermal expansion occurs, thus the projecting portion (16) is not in contact with the recess portion, a main flow gas (1) is less entrained within the cavity (15), and a pressure loss is reduced because of no swirl, so that a performance of the gas turbine is enhanced.
    • 本发明涉及一种由燃气轮机的壳体和具有尖端护罩的活动叶片构成的空腔,通过该空腔将腔空间制成所需的最小尺寸,防止主流动气体夹带,压力损失为 减少 尖端护罩(6)安装在活动叶片(4)的前端部分上,其上安装有翅片(7),比现有技术的凹部(15)窄,部分(12a)形成, 和壳体(12)和翅片(7)的另一个突出部分(16),并且在尖端罩(6)的上游端部设置有突出部分(16)。 即使发生热膨胀,突出部16在冷启动时处于位置(13a),并且在热启动时处于位置(13b),因此突出部16 )不与凹部接触,主流动气体(1)较少夹带在空腔(15)内,并且由于没有涡流而导致压力损失降低,从而提高了燃气轮机的性能。