公开(公告)号：US11732701B2

公开(公告)日：2023-08-22

申请号：US17401934

申请日：2021-08-13

Applicant: Danfoss A/S

Inventor： Tianlei Li ,  Lin Sun ,  Mihai Bogdan Dobrica

IPC: F04B7/00 ,  F04B43/00 ,  F16J15/3288 ,  F25B11/04

CPC classification number: F04B7/0088 ,  F04B43/009 ,  F16J15/3288 ,  F25B11/04 ,  F04B2201/0803

Abstract: A centrifugal compressor for HVAC application includes a rotary component rotatable about an axis, a static component, and a brush seal fixed to one of the static component and the rotary component. The brush seal includes bristles that contact the other of the static component and the rotary component.

公开(公告)号：US11719359B2

公开(公告)日：2023-08-08

申请号：US17450218

申请日：2021-10-07

Applicant: PSG CALIFORNIA LLC

Inventor： Erik Nathaniel Solfelt ,  Mehrab Mumin Choudhury ,  Brian Richard Binder ,  Leonard Galvan ,  Christopher H. Verdugo ,  Christopher Jon Distaso ,  Samuel Vanderpoel Gilbert, V

IPC: F16K37/00 ,  F04B43/00 ,  F04B43/02

CPC classification number: F16K37/0083 ,  F04B43/009 ,  F04B43/02 ,  F16K37/0091 ,  F04B2201/0803 ,  Y10T137/3084 ,  Y10T137/5907 ,  Y10T137/8342

Abstract: In one general aspect, the present application relates to a leak detection device that includes a body, a liquid separator, and a liquid level detector. The body includes an airflow inlet, an airflow outlet, and a liquid reservoir. The airflow outlet is arranged to substantially align with the airflow inlet. The liquid reservoir is formed in a bottom portion of the body. The liquid separator is positioned directly between the airflow inlet and the airflow outlet. The liquid separator divides an airflow path from the airflow inlet to the airflow outlet into at least two separate flow paths around the liquid separator. The liquid level detector is at least partially contained within a channel defined within a lower portion of the liquid separator, where the channel is in liquid communication with the liquid reservoir.

公开(公告)号：US20140294608A1

公开(公告)日：2014-10-02

申请号：US14353859

申请日：2012-05-29

Applicant: Oliver Warren

Inventor： Oliver Warren

IPC: F04B43/00 ,  F04B43/12

CPC classification number: F04B43/0081 ,  F04B43/009 ,  F04B43/12 ,  F04B43/1238 ,  F04B49/10 ,  F04B53/16 ,  F04B2201/0803 ,  F04B2207/70

Abstract: A peristaltic pump is provided comprising a drive unit, a pumphead comprising a pressing element. The pumphead is connectable to the drive unit such that, when connected, the pressing element is driveable by the drive unit to exert a peristaltic action on a tube arranged within the pumphead. The pumhead further comprises an optical sensor, wherein the optical sensor comprises an emitter and a receiver which are mounted on the drive unit and a reflector element mounted on the pumphead. The reflector element is arranged on the pumphead such that when the pumphead is connected to the drive unit, radiation emitted by the emitter is reflected by the reflector element towards the receiver.

Abstract translation: 蠕动泵设置有驱动单元，泵头包括按压元件。 泵头可连接到驱动单元，使得当连接时，按压元件可由驱动单元驱动，以对布置在泵头内的管施加蠕动作用。 斩波器还包括光学传感器，其中光学传感器包括安装在驱动单元上的发射器和接收器以及安装在泵头上的反射器元件。 反射器元件布置在泵头上，使得当泵头连接到驱动单元时，由发射器发射的辐射由反射器元件朝向接收器反射。

公开(公告)号：US20110046902A1

公开(公告)日：2011-02-24

申请号：US12674381

申请日：2008-07-25

Applicant: Age Kyllingstad

Inventor： Age Kyllingstad

IPC: G06F19/00 ,  G01M3/00

CPC classification number: G01M3/26 ,  F04B51/00 ,  F04B2201/0208 ,  F04B2201/0605 ,  F04B2201/0803

Abstract: A method for detection of a fluid leak related to at least one piston machine (1), where the method includes: —attaching a pressure sensor (18, 24) to at least a pressure side of the at least one piston machine (1); —measuring the pressure on the pressure side of the at least one piston machine (1); —attaching a transmitter (28) to the at least one piston machine (1), said transmitter (28) rendering a signal for calculating the rotational speed of the at least one piston machine (1); —calculating the speed of the at least one piston machine (1); —calculating the sum of nominal flow rates from all piston machines (1); —calculating a flow rate compensation factor; —calculating a normalized pressure (42) to be equal to the discharge pressure multiplied by the said compensation factor for the flow rate; and —monitoring the normalized pressure (42) to detect a leakage.

Abstract translation: 一种用于检测与至少一个活塞机（1）相关的流体泄漏的方法，其中所述方法包括：将压力传感器（18,24）附接到所述至少一个活塞机器（1）的至少一个压力侧， ; - 测量所述至少一个活塞机（1）的压力侧的压力; 将发射器（28）附接到所述至少一个活塞机器（1），所述发射器（28）呈现用于计算所述至少一个活塞机器（1）的转速的信号; 计算所述至少一个活塞机器（1）的速度; 计算所有活塞机（1）的额定流量的总和; 计算流量补偿系数; 将归一化压力（42）计算为等于排出压力乘以所述用于流量的所述补偿因子; 并监测归一化压力（42）以检测泄漏。

公开(公告)号：US11959475B2

公开(公告)日：2024-04-16

申请号：US18070757

申请日：2022-11-29

Applicant: HASKEL INTERNATIONAL, LLC

Inventor： Pooya Mahmoudian ,  Richard Gillberg, Jr.

IPC: F04B53/16 ,  F04B1/0443 ,  F04B49/06 ,  G01M3/16

CPC classification number: F04B53/162 ,  F04B1/0443 ,  F04B49/065 ,  F04B53/16 ,  G01M3/16 ,  F04B2201/0803 ,  F04B2207/70

Abstract: A liquid leak detector for a pump is described. The liquid leak detector is mountable on a pump to detect leaked fluid coming from the pump. The leak detector includes a buffer tube positioned on the pump to collect a leaked fluid from the pump and a sensor positioned on the buffer tube to detect the level of leaked fluid in the buffer tube and to generate a signal when the leaked fluid reaches a maximum fluid level. A purge line on the buffer tube removes leaked drive fluid from the buffer tube once the leaked drive fluid reaches a maximum level. Logic connected to the sensor receives the signal from the detector and generates an alarm.

公开(公告)号：US11768019B2

公开(公告)日：2023-09-26

申请号：US16859725

申请日：2020-04-27

Applicant: EMERSON ELECTRIC CO.

Inventor： Thomas P. Buescher ,  Gregory E. Sisk ,  Charles P. Ketterer ,  Frank S. Wallis

IPC: F25B31/02 ,  F25B41/00 ,  F04B49/02

CPC classification number: F25B41/006 ,  F04B49/02 ,  F04B2201/0803 ,  F25B2400/077 ,  F25B2500/26

Abstract: The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback.

公开(公告)号：US20160377070A1

公开(公告)日：2016-12-29

申请号：US15187940

申请日：2016-06-21

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Poul Erik Hansen ,  Erik Haugaard

IPC: F04B19/22

CPC classification number: F04B19/22 ,  F03C1/06 ,  F04B1/12 ,  F04B49/10 ,  F04B2201/0803 ,  F04F13/00

Abstract: A hydraulic machine arrangement (1) is described having a housing (5), a working section and a hollow inside said housing (5), a supply port arrangement LPin, HPin, LPout connected to said working area, and a leakage path (7) between said working section and said hollow. It should be possible to detect wear with simple means. To this end, said housing (5) is provided with a leakage port (8) connected to said hollow.

Abstract translation: 一种液压机器装置（1）被描述为在所述壳体（5）内部具有壳体（5），工作部分和中空部分，连接到所述工作区域的供应端口布置LPin，HPin，LPout和泄漏路径（7 ）在所述工作部分和所述中空部分之间。 应该可以用简单的手段检测磨损。 为此，所述壳体（5）设置有连接到所述中空部的泄漏口（8）。

公开(公告)号：US06338612B1

公开(公告)日：2002-01-15

申请号：US09445349

申请日：2000-03-09

Applicant: Robert Spillner ,  Hans-Willi Gerigk

Inventor： Robert Spillner ,  Hans-Willi Gerigk

IPC: F04B1924

CPC classification number: F04B23/021 ,  F04B53/16 ,  F04B2201/0803 ,  F04C2/14 ,  F04C15/0049 ,  F04C2230/602

Abstract: A hydraulic pump system having a pump for pressurizing fluid and a hydraulic chamber for receiving fluid from the pump. An even flow of fluid is outputted from the chamber to a valve assembly. The chamber is formed from a resonator and a resonator cover that are attached in a fluid tight manner by elastic fasteners. The resonator cover acts as a pressure controller in that when the pressure of fluid is of sufficient magnitude, this force creates a gap for controlling fluid pressure output to the valve assembly.

Abstract translation: 一种具有用于加压流体的泵和用于从泵接收流体的液压室的液压泵系统。 流体的均匀流从室输出到阀组件。 腔室由谐振器和谐振器盖形成，谐振器盖通过弹性紧固件以流体密封的方式附接。 谐振器盖用作压力控制器，因为当流体的压力足够大时，该力产生用于控制输出到阀组件的流体压力的间隙。

公开(公告)号：US5457626A

公开(公告)日：1995-10-10

申请号：US299988

申请日：1994-09-01

Applicant: David A. Wolze

Inventor： David A. Wolze

IPC: G01N30/34 ,  F04B49/06 ,  F04B49/08 ,  F04B49/20 ,  G01N30/32 ,  G05B13/02 ,  G05D7/06 ,  G06F19/00 ,  B01D15/08

CPC classification number: G05D7/0682 ,  F04B49/065 ,  F04B49/20 ,  G01N30/32 ,  F04B2201/0803 ,  F04B2205/05 ,  F04B2205/09 ,  F04B2207/041 ,  F04B2207/042 ,  G01N2030/324 ,  G01N2030/326

Abstract: Flowrate in a precision pump used for liquid chromatography employs a digital control system incorporating artificial intelligence. The pump system operates in a default flow mode, wherein real-time pressure feedback is not used to control motor speed, or in pressure mode, wherein motor speed is controlled by the pump system pressure point. The artificial intelligence commands mode changes to pressure mode when the constant displacement flow measurement time is within a threshold relative to commanded flowrate, and when the higher pressure piston is being measured. Flow mode pressure ripple is minimized by monitoring pressure points and commanding motor speed change at appropriate positions during the motor cam rotation. Pressure mode uses the higher pressurized piston as a reference for constant displacement flow measurement and provides accurate flowrate even if one piston is leaky. In pressure mode, the artificial intelligence monitors for intake cycle oscillation and optimizes a highest system pressure gain dynamically. By determining the duration of hydraulic intake and activating proportioning only during the constant intake flow portion of an intake cycle, constant flowrate proportioning is provided. The present invention compensates for a variety of system and environmental variables including leaky valves, air bubbles, a leaky cylinder head, pressure changes, and variations in anticipated compliance and can maintain a flowrate constant within about .+-.1% without using real-time pressure feedback.

Abstract translation: 用于液相色谱的精密泵中的流速采用包含人工智能的数字控制系统。 泵系统以默认流量模式运行，其中实时压力反馈不用于控制电动机速度，或在压力模式下，其中电动机速度由泵系统压力点控制。 当恒定位移流量测量时间相对于指令流量在阈值内时，以及当测量高压活塞时，人造智能指令模式变为压力模式。 在电机凸轮旋转期间，通过监控压力点和指定电机转速在适当的位置来最大限度地减小流模式压力波动。 压力模式使用较高压力的活塞作为恒定位移流量测量的基准，即使一个活塞泄漏，也能提供精确的流量。 在压力模式下，人工智能监测进气循环振荡，并动态优化系统最高压力增益。 通过仅在进气循环的恒定进气流量部分中确定液压进气和活化配比的持续时间，提供恒定的流量配比。 本发明补偿了各种系统和环境变量，包括泄漏阀，气泡，泄漏气缸盖，压力变化和预期顺应性的变化，并且可以将流量常数维持在约+/- 1％内，而不使用实时 压力反馈。

公开(公告)号：US20240360826A1

公开(公告)日：2024-10-31

申请号：US18684464

申请日：2022-07-08

Applicant: Hitachi High-Tech Corporation

Inventor： Daisuke KANAI ,  Yuichiro HASHIMOTO ,  Daisuke AKIEDA

IPC: F04B51/00

CPC classification number: F04B51/00 ,  F04B2201/0803 ,  F04B2205/05

Abstract: Provided is an inspection method for a liquid feeding device capable of preventing an increase in the number of components, a decrease in throughput, and an increase in a leakage source. The method includes: suctioning a fluid from a fluid tank into a first cylinder by driving a first plunger in a suction direction; driving the first plunger in a discharge direction after suction; stopping the first plunger for a predetermined first time; driving the first plunger in the discharge direction; and estimating a leakage amount in a flow path on an upstream side of a second check valve based on a detection value of a pressure detected by a pressure sensor from start of the driving of the first plunger in the discharge direction to end of the driving of the first plunger in the discharge direction.