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    • 79. 发明专利
    • Gas turbine engine
    • 气体涡轮发动机
    • JP2005351270A
    • 2005-12-22
    • JP2005152248
    • 2005-05-25
    • United Technol Corp ユナイテッド テクノロジーズ コーポレイションUnited Technologies Corporation
    • PRASAD DILIPFENG JINZHANGSABNIS JAYANT S
    • F02C7/042F02C7/045F02C7/24F02K1/10F02K1/15F02K3/04
    • F02C7/042B64D33/02B64D2033/0206B64D2033/0286F02C7/045Y10T137/0536
    • PROBLEM TO BE SOLVED: To reduce noise emitted outward from a fan section 12. SOLUTION: A gas turbine is provided with a nacelle 22. The nacelle 22 is provided with a nacelle inner surface 32 defining a suction duct 42 including a suction duct zone and a nacelle outer surface projecting out to a radial direction inner side from the nacelle inner surface. A means 66 selectively reducing a suction zone of the nacelle 22 is arranged on the nacelle inner surface or the nacelle outer surface. An expansion type bladder 70 is included in the means 66 selectively reducing the suction zone. The bladder 70 is provided with a bladder surface 72 and plenum 74 arranged in a radial direction outside of the bladder surface 72. Pressurized fluid is supplied to the plenum through a pressure supply passage 76. The bladder 70 includes a expansion position and a retreat position, and reduces a suction duct zone to form a throat 82 in the expansion position. Consequently, suction duct zone of the suction duct reduces and acoustic attenuation increases. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:减少从风扇部分12向外发出的噪声。解决方案:燃气轮机设置有机舱22.机舱22设置有限定吸入管道42的机舱内表面32 包括从机舱内表面向径向内侧突出的吸入管道区域和机舱外表面。 选择性地减小机舱22的吸入区域的装置66设置在机舱内表面或机舱外表面上。 膨胀型气囊70包括在选择性地减小吸入区域的装置66中。 气囊70设置有在径向方向上布置在气囊表面72外侧的气囊表面72和气室74.加压流体通过压力供应通道76供应到气室。气囊70包括膨胀位置和后退位置 并且减小吸入管道区域以在膨胀位置形成喉部82。 因此,吸入管道的吸入管道区域减小,声学衰减增加。 版权所有(C)2006,JPO&NCIPI