公开(公告)号：US6062819A

公开(公告)日：2000-05-16

申请号：US945368

申请日：1997-10-23

申请人： Mehrdad Zangeneh ,  Hideomi Harada ,  Akira Goto

发明人： Mehrdad Zangeneh ,  Hideomi Harada ,  Akira Goto

IPC分类号： F04D29/22 ,  F04D29/24 ,  F04D29/28 ,  F04D29/30 ,  F04D29/68

CPC分类号： F04D29/284 ,  F04D29/2205 ,  F04D29/681

摘要： An impeller in a turbomachinery has blades designed such that reduced static pressure difference .DELTA.Cp between the hub and the shroud on the suction surface of the blade shows a remarkably decreasing tendency near the impeller exit as it approaches the impeller exit between the impeller inlet and the impeller exit.

摘要翻译： PCT No.PCT / GB95 / 02904 Sec。 371日期：1997年10月23日 102（e）日期1997年10月23日PCT 1995年12月7日PCT PCT。 出版物WO97 / 21035 日期1997年6月21日在涡轮机械中的叶轮具有叶片，其设计成使得在桨叶和叶片的吸力表面上的护罩之间减小的静压差DELTA Cp在叶轮出口附近显现出显着降低的趋势， 叶轮入口和叶轮出口。

公开(公告)号：US5947680A

公开(公告)日：1999-09-07

申请号：US708664

申请日：1996-09-05

申请人： Hideomi Harada ,  Shunro Nishiwaki ,  Kazuo Takei

发明人： Hideomi Harada ,  Shunro Nishiwaki ,  Kazuo Takei

IPC分类号： F04D1/02 ,  F04D27/02 ,  F04D29/46 ,  F04B27/02

CPC分类号： F04D29/462 ,  F04D27/002 ,  F04D27/0246 ,  F04D27/0261 ,  F04D27/0284

摘要： Driven turbomachinery for use in centrifugal and mixed flow pump overcomes operational for overcoming difficulties, such as flow separation and generation of surge at low flow rates, often encountered in similar machines of the conventional design. The turbomachinery is provided with variable-angle inlet guide vane and variable-angle diffuser vanes, and the diffuser section is constructed according to a fluid dynamic principle, and the vanes having a wing shape are distributed tangentially so that the diffuser section acts as a centrifugal diffuser. A convenient operational parameter, chosen from such variables as input current to the drive motor, rotational speed or torque of the drive motor, inlet/exit pressures, and fluid velocity, is monitored during the operation by means of sensors strategically attached to parts of the operating system. Real-time changes in the operating parameter is measured and the setting angle of the inlet guide vane is adjusted in accordance with a predetermined relation between inlet flow volume rates and flow angle of the fluid exiting from the impeller so as to maintain the fluctuations in the monitored operating parameter below a threshold value. If the targeted head value is not produced under this adjustment, the setting angle of the diffuser vanes can also be adjusted based on real-time measurements of other operational parameters. If this adjustment fails to produce the targeted head value, then the rotational speed of the impeller can be adjusted to operate the system while avoiding surge and other problems encountered at flow rates.

摘要翻译： 用于离心和混流泵的驱动涡轮机械克服了克服困难的操作，例如在常规设计的类似机器中经常遇到的流量分离和在低流量下产生浪涌。 涡轮机械设有可变角入口引导叶片和可变角度扩散器叶片，并且扩散器部分根据流体动力学原理构造，并且具有翼形的叶片切向分布，使得扩散器部分用作离心 扩散器 在操作期间通过策略性地附接到驱动马达的部分的传感器来监测从诸如驱动马达的输入电流，驱动马达的转速或转矩，入口/出口压力和流体速度等变量中选择的便利的操作参数 操作系统。 测量操作参数的实时变化，并且根据入口流量与从叶轮离开的流体的流动角度之间的预定关系来调整入口导流叶片的设定角度，以保持入口导叶的波动 监控操作参数低于阈值。 如果在该调整下不产生目标头值，则也可以基于其他操作参数的实时测量来调整扩散器叶片的设定角度。 如果该调整不能产生目标头值，则可以调整叶轮的转速以操作系统，同时避免浪涌和其他在流速下遇到的问题。

公开(公告)号：US06508626B1

公开(公告)日：2003-01-21

申请号：US09700842

申请日：2001-01-04

申请人： Takaki Sakurai ,  Hideomi Harada ,  Kosuke Ashihara ,  Mehrdad Zangeneh ,  Akira Goto

发明人： Takaki Sakurai ,  Hideomi Harada ,  Kosuke Ashihara ,  Mehrdad Zangeneh ,  Akira Goto

IPC分类号： F01D522

CPC分类号： F04D29/2277 ,  F04D29/284

摘要： Disclosed is an impeller for a turbomachine. The impeller comprises a hub, full blades equidistantly disposed on the hub in a circumferential direction, and a splitter blade disposed between each adjacent two of the full blades. The splitter blade is shaped in such a way that a spanwise distribution of a pitchwise position of a leading edge of the splitter blade is determined according to a spanwise and pitchwise non-uniformity distribution of fluid velocity of a fluid flowing into the splitter blade, whereby a non-dimensional circumferential position of a leading edge of the splitter blade varies in a spanwise direction.

摘要翻译： 公开了一种用于涡轮机的叶轮。 叶轮包括轮毂，沿圆周方向等距地设置在轮毂上的全部叶片，以及设置在每个相邻的两个完整叶片之间的分流叶片。 分流叶片成形为使得分流叶片的前缘的俯仰位置的翼展方向分布根据流入分流叶片的流体的流体速度和间距不均匀分布来确定，由此 分流叶片的前缘的无量纲圆周位置在翼展方向上变化。

公开(公告)号：US5618160A

公开(公告)日：1997-04-08

申请号：US442585

申请日：1995-05-17

申请人： Hideomi Harada ,  Kazuo Takei

发明人： Hideomi Harada ,  Kazuo Takei

IPC分类号： F04D27/02 ,  F04D29/46

CPC分类号： F04D29/466 ,  F04D27/002 ,  F04D27/0246 ,  F04D27/0284 ,  F04D29/462

摘要： A turbomachinery is presented to provide stable operation at fluid flow rates much lower than the design flow rate without introducing surge in the device. This is achieved by providing a diffuser with variable angle vanes. The vane angle at low flow rates is adjusted so as to minimize the diffuser loss of the exiting fluid stream from the impeller. Since the flow angle of the exit flow of the impeller is a function only of the non-dimensional flow rates, and does not depend on the flow angle at the inlet the impeller, therefore, the vane angles can be regulated to achieve a stable operation of the impeller without producing surge of the turbomachinery at flow rates lower than the design flow rate. To optimize the performance of the turbomachinery, in addition to the variable angle vanes, an inlet guide vane having variable vane angle is provided so that the turbomachinery can be operated at the required flow rate and head pressure. The concept is demonstrated in a turbomachinery provided with variable diffuser vanes and an inlet guide vane.

摘要翻译： 提供了一种涡轮机构，以便在流体流动速率比设计流速低得多的情况下提供稳定的操作，而不会在设备中引入浪涌。 这通过提供具有可变角度叶片的扩散器来实现。 调节低流速下的叶片角度，以使来自叶轮的离开的流体流的扩散器损失最小化。 由于叶轮的排出流的流角仅与无量纲的流量有关，并且不依赖于叶轮入口处的流角，因此可以调节叶片角度以实现稳定的操作 的叶轮，而不会以低于设计流速的流速产生涡轮机械的浪涌。 为了优化涡轮机械的性能，除了可变角度叶片之外，还提供具有可变叶片角度的入口导向叶片，使得涡轮机械可以以所需的流量和压头运行。 该概念在具有可变扩散器叶片和入口引导叶片的涡轮机中得以证明。

公开(公告)号：US5927939A

公开(公告)日：1999-07-27

申请号：US579604

申请日：1995-12-28

申请人： Hideomi Harada ,  Shunro Nishiwaki ,  Kazuo Takei

发明人： Hideomi Harada ,  Shunro Nishiwaki ,  Kazuo Takei

IPC分类号： F04D1/00 ,  F04D27/02 ,  F04D29/46

CPC分类号： F04D29/466 ,  F04D27/002 ,  F04D27/0246 ,  F04D29/462

摘要： A turbomachine having variable angle diffuser vanes is demonstrated with the use of a centrifugal pump. The performance of a diffuser is enhanced greatly by the use of adjustable angle diffuser vanes which can be set to a wide range of vane angles to provide a variable size of an opening between adjacent vanes. The demonstrated pumping system has a significantly wider operating range than that in conventional pumping systems over a wide flow rate, and is particularly effective in the low flow range in which known diffuser vane arrangements would lead to surge in the entire system and other serious operational problems. A number of examples and formulae are given to demonstrate the computational methods used to select a vane angle for a given set of operating conditions of the turbomachine.

摘要翻译： 使用离心泵证明具有可变角度扩散器叶片的涡轮机。 扩散器的性能通过使用可调节的角度扩散器叶片而大大提高，其可以设置在宽范围的叶片角度上，以提供相邻叶片之间的开口的可变尺寸。 所展示的泵送系统具有比在常规泵送系统中更宽的流量范围内的显着更宽的操作范围，并且在已知的扩散器叶片装置将导致整个系统的浪涌和其他严重的操作问题的低流量范围内特别有效 。 给出了许多示例和公式来演示用于为涡轮机的给定的一组操作条件选择叶片角度的计算方法。

公开(公告)号：US5685696A

公开(公告)日：1997-11-11

申请号：US379473

申请日：1995-02-01

申请人： Mehrdad Zangeneh ,  Hideomi Harada ,  Akira Goto

发明人： Mehrdad Zangeneh ,  Hideomi Harada ,  Akira Goto

IPC分类号： F01D5/04 ,  F01D5/14 ,  F04D29/22 ,  F04D29/24 ,  F04D29/28 ,  F04D29/30 ,  F04D29/66 ,  F04D29/68 ,  F04D29/38

CPC分类号： F01D5/048 ,  F04D29/68 ,  Y02T50/673

摘要： An impeller in a turbomachine has blades designed such that a reduced static pressure difference .DELTA.Cp between a hub and a shroud on a suction surface of a blade has a tendency to remarkably decrease in the vicinity of an impeller exit as it approaches the impeller exit from an inlet.

摘要翻译： PCT No.PCT / GB94 / 01254 Sec。 371日期：1995年2月1日 102（e）1995年2月1日PCT PCT 1991年6月10日PCT公布。 第WO95 / 34744号公报 日期1995年12月21日涡轮机中的叶轮具有叶片，其设计成使得轮毂和叶片的吸入表面上的护罩之间的减小的静压差DELTA Cp具有在叶轮出口附近显着降低的趋势，因为它 从入口接近叶轮出口。