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公开(公告)号：US20090142213A1
公开(公告)日：2009-06-04
申请号：US12050541
申请日：2008-03-18
申请人： Todd W. ALLUM
发明人： Todd W. ALLUM
IPC分类号： F01C1/24
CPC分类号： F04C29/068 , F04C18/126 , F04C29/0035 , F04C29/061
摘要： A Roots-type blower with helical cycloidal rotors features relief recesses in the chamber walls, isolated from the input and output ports. The relief recesses counter variation in leakback flow with angular position intrinsic to helical cycloidal rotors, attenuating a noise source.
摘要翻译： 具有螺旋摆线转子的罗茨式鼓风机在室壁中具有与输入和输出端口隔离的浮雕凹槽。 减压凹槽可以抵抗螺旋摆线转子固有的角位置的泄漏回流的变化，从而衰减噪声源。
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公开(公告)号：US20100111736A1
公开(公告)日：2010-05-06
申请号：US12263769
申请日：2008-11-03
CPC分类号： B23P19/10 , F04C18/126 , F04C29/0035 , F04C2230/603 , F04C2240/81 , Y10T29/49236 , Y10T29/49771 , Y10T29/49776 , Y10T29/49895 , Y10T29/49902 , Y10T29/53022 , Y10T29/53039 , Y10T29/53061 , Y10T29/53978
摘要： Roots-type blowers with helical cycloidal rotors exhibit variation in leakback flow with angular position intrinsic to these rotor geometries. Calibration of individual blowers using a combination of high-resolution alignment and enhanced detection of residual noise phenomena permits noise in as-produced blowers to be significantly attenuated. Intrinsic lower limits of noise induced by leakback variation are associated with manufacturing tolerances, necessary clearances, and particular geometric considerations. Gross alignment errors (excluding contact between rotors) produce a characteristic noise pulse rate that is three times the shaft rate. Proper alignment suppresses this and reveals a pulse sequence at double this rate and at about half of the amplitude of faulty alignment. The novel process explains the error mechanisms and defines repeatable calibration methods for a mass-production environment, introducing appropriate gauges and methods for the task.
摘要翻译： 具有螺旋摆线转子的罗茨式鼓风机在这些转子几何形状固有的角位置上表现出回流的变化。 使用高分辨率对准和增强的残留噪声现象的组合的单个鼓风机的校准允许产生的鼓风机中的噪声被显着衰减。 由回漏变化引起的噪声的固有下限与制造公差，必要的间隙和特定的几何考虑相关联。 总体对准误差（不包括转子之间的接触）产生的特征噪声脉冲速率是轴速率的三倍。 正确的对准抑制了这一点，并且以两倍的速率显示脉冲序列，并且大约是有缺陷对准的幅度的一半。 该新颖的过程解释了错误机制，并为大规模生产环境定义了可重复的校准方法，为该任务引入了适当的量规和方法。
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