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11 条记录 (耗时 0.013 秒)

    ROOTS-TYPE BLOWER ROTOR ALIGNMENT METHOD AND APPARATUS
    1.
    发明申请
    ROOTS-TYPE BLOWER ROTOR ALIGNMENT METHOD AND APPARATUS 有权
    ROOTS型鼓风机转子对准方法和装置

    公开(公告)号：US20100111736A1

    公开(公告)日：2010-05-06

    申请号：US12263769

    申请日：2008-11-03

    申请人： Todd W. ALLUM ,  Edgardo F. Marcello ,  Stephen C. Hanson

    发明人： Todd W. ALLUM ,  Edgardo F. Marcello ,  Stephen C. Hanson

    IPC分类号： F04C28/00 ,  B23P19/10 ,  G01F1/34 ,  F04C18/18

    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。

    Method and apparatus for attenuating compressor noise
    6.
    发明申请
    Method and apparatus for attenuating compressor noise 有权
    用于衰减压缩机噪音的方法和装置

    公开(公告)号：US20050166921A1

    公开(公告)日：2005-08-04

    申请号：US11088316

    申请日：2005-03-23

    申请人： Douglas DeVries ,  Malcolm Williams

    发明人： Douglas DeVries ,  Malcolm Williams

    IPC分类号： A61M16/00 ,  A62B7/00 ,  F01C1/18

    CPC分类号： A61M16/0057 ,  A61M16/0063 ,  A61M16/0066 ,  A61M16/0069 ,  A61M2205/42 ,  F04C18/126 ,  F04C29/061 ,  F04C29/065

    摘要： The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers. The perforated tube has a port through which gas is accepted and at least one exterior tube through which gas exits. Impedance mismatches are created between the inlet chamber and the exterior tubes and between the exterior tubes and the chamber in which the perforated tube is located, which are useful in attenuating noise. One embodiment of the invention comprises a noise attenuating mounting system for a compressor. The mounting system comprises flexible mounts that cooperate to dampen vibrations generated by the compressor.

    摘要翻译： 本发明包括一种减少压缩机产生的噪声的方法和装置，包括罗茨式鼓风机。 本发明特别用于降低在机械通风机中使用的压缩机产生的噪音，尽管其优点可以在许多不同的应用中实现。 本发明的一个实施例包括用于包含在便携式通风机壳体中的压缩机的噪声衰减气体流动路径。 在一个实施例中，气体流路包括通过流动管互连的多个室。 流路被折叠以便装配到便携式通风机壳体的有限空间中。 选择室和流管的尺寸，使得在腔室和流管之间产生阻抗失配。 在本发明的一个实施例中，流动路径包括位于一个或多个室中的一个或多个穿孔管。 多孔管具有可接受气体的端口和气体离开的至少一个外部管。 在入口室和外管之间以及外管和多孔管所在的室之间产生阻抗不匹配，这有助于衰减噪声。 本发明的一个实施例包括用于压缩机的噪声衰减安装系统。 安装系统包括柔性安装件，其配合以抑制由压缩机产生的振动。

    FLOW SENSOR
    8.
    发明申请
    FLOW SENSOR 有权
    流量传感器

    公开(公告)号：US20090250059A1

    公开(公告)日：2009-10-08

    申请号：US12099588

    申请日：2008-04-08

    申请人： Todd W. Allum ,  Malcom R. Williams ,  Joseph Cipollone

    发明人： Todd W. Allum ,  Malcom R. Williams ,  Joseph Cipollone

    IPC分类号： A61M16/00

    CPC分类号： A61B5/087 ,  A61B5/0876 ,  A61M16/0051 ,  A61M16/0057 ,  A61M16/021 ,  A61M16/04 ,  A61M16/0816 ,  A61M16/0833 ,  A61M16/0866 ,  A61M2016/0021 ,  A61M2016/0027 ,  A61M2016/0036 ,  A61M2205/42 ,  G01F1/36 ,  G01F1/40 ,  G01F1/50 ,  G01F15/00

    摘要： A bi-directional flow sensor is adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor comprises a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor is disposed in the throat section and is adapted to measure differential pressure in the flow. A baffle is mounted at the ventilator end and is adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end includes a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor minimizes pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.

    摘要翻译： 双向流量传感器适用于通过流量传感器流动的压力感测中减少气动噪声。 流量传感器包括中空的管状构件，其具有设置在通气机端和患者端之间的喉部。 流量限制器设置在喉部中并且适于测量流动中的压差。 挡板安装在通风机端部，并且适于使位于限流器的相对端部处的压力抽头处的非轴向流动最小化。 患者端包括流动障碍物，其构造成在从患者端到呼吸机终端的呼气流动期间促使穿过压力抽头处的流动的均匀速度。 流量传感器可将气动噪声降至小于0.1 LPM，以便精确的患者流量测量，并以0.2 LPM的流速触发吸入和呼气阶段。

    ROOTS-TYPE BLOWER REDUCED ACOUSTIC SIGNATURE METHOD AND APPARATUS
    9.
    发明申请
    ROOTS-TYPE BLOWER REDUCED ACOUSTIC SIGNATURE METHOD AND APPARATUS 有权
    ROOTS型鼓风机减少声学签名方法和装置

    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。

    Ventilator system
    10.
    发明授权
    Ventilator system 有权
    呼吸机系统

    公开(公告)号：US6152135A

    公开(公告)日：2000-11-28

    申请号：US178466

    申请日：1998-10-23

    申请人： Douglas F. DeVries ,  Michael B. Holmes

    发明人： Douglas F. DeVries ,  Michael B. Holmes

    IPC分类号： A61M16/00 ,  A61M16/12 ,  A61M16/20 ,  A62B9/02

    CPC分类号： A61M16/20 ,  A61M16/00 ,  A61M16/0057 ,  A61M16/12 ,  A61M16/204 ,  A61M16/0066 ,  A61M2016/0021 ,  A61M2016/0039 ,  A61M2205/42

    摘要： A portable mechanical ventilator uses a constant-speed compressor compressor and a recirculating bypass circuit. Bypass flow is governed by a spring-biased bypass valve so connected to both the inlet and the outlet of the main flow control valve as to maintain a differential pressure across the flow valve sufficient to operate the ventilator with minimal energy consumption. The flow valve is operated by a microprocessor in accordance with empirically derived lookup tables to both produce the desired air flow and provide a measure of that air flow.

    摘要翻译： 便携式机械呼吸机使用恒速压缩机压缩机和循环旁路电路。 旁路流由一个弹簧偏置的旁通阀控制，连接到主流量控制阀的入口和出口两端，以保持跨越流量阀的压差足以以最小的能量消耗操作呼吸机。 流量阀由微处理器根据经验导出的查找表来操作，以产生所需的气流并提供该气流的量度。