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    • 5. 发明授权
    • Thrust balanced turn base for the nozzle assembly of an abrasive media
blasting system
    • 用于研磨介质爆破系统的喷嘴组件的推力平衡转底
    • US5795214A
    • 1998-08-18
    • US813114
    • 1997-03-07
    • Ross M. Leon
    • Ross M. Leon
    • B24C1/00B24C3/02B24C5/04
    • B24C5/04B24C1/003B24C3/02
    • A thrust balanced turn base for changing the direction of a fluid flow containing entrained abrasive media is provided. The turn base includes an elongated member having an inlet for the fluid flow with the entrained abrasive media. The turn base further includes a first internal passageway that extends in a downstream direction from the inlet. The first passageway includes a first throat, a converging portion between the inlet and the throat, a diverging portion extending downstream from the throat, an additional converging portion downstream from the diverging portion, a turning portion downstream from the additional converging portion that converges to a second throat and that leads to a nozzle that conducts the fluid flow containing the entrained abrasive media in an angled direction relative to the long axis of the turn base. The turn base also includes a second internal passageway that is in fluid communication with the first internal passageway at an aperture in the first internal passageway located between the inlet and the first throat. The second internal passageway includes a first portion that extends from the aperture and a second gentlely diverging portion that extends from the first portion and that terminates abruptly in a second nozzle that is oriented at about 90.degree. to the long axis of the turn base. The first portion of the second passageway is configured to divert a portion of substantially abrasive media-free fluid flow from the first internal passageway. The second nozzle is oriented and sized so that the thrust of the entrained abrasive media flow from the first nozzle is substantially counter balanced by the thrust of the abrasive media-free flow from the second nozzle.
    • 提供了一种用于改变包含夹带磨料介质的流体流动方向的推力平衡转向底座。 转底部包括细长构件,其具有用于流体流动的夹带夹带的研磨介质的入口。 转动底座还包括从入口沿下游方向延伸的第一内部通道。 第一通道包括第一喉部,入口和喉部之间的会聚部分,从喉部下游延伸的发散部分,在发散部分下游的附加会聚部分,从附加会聚部分下游的会聚到一个 第二喉道,并且通向喷嘴,所述喷嘴相对于转底座的长轴线以夹角方向将含有夹带的研磨介质的流体流传导。 转底还包括第二内部通道,该第二内部通道在位于入口和第一喉部之间的第一内部通道中的孔处与第一内部通道流体连通。 所述第二内部通道包括从所述孔延伸的第一部分和从所述第一部分延伸的第二温和发散部分,并且突出地在与所述转弯基座的长轴方向成90°定向的第二喷嘴中终止。 第二通道的第一部分构造成将来自第一内部通道的基本上无研磨介质的流体流的一部分转移。 第二喷嘴的取向和尺寸使得夹带的磨料介质从第一喷嘴流出的推力通过来自第二喷嘴的无磨料介质流的推力基本上反平衡。