公开(公告)号：US20130247999A1

公开(公告)日：2013-09-26

申请号：US13427072

申请日：2012-03-22

Applicant: Dayao Chen ,  Pengfei Ma ,  Tonglin Shang ,  Bryan J. Hilman

Inventor： Dayao Chen ,  Pengfei Ma ,  Tonglin Shang ,  Bryan J. Hilman

IPC: F17D3/00 ,  F17D1/16 ,  F16L55/04

CPC classification number: F15B1/08 ,  F15B19/005 ,  F15B2201/205 ,  F15B2201/51 ,  G01M3/02 ,  G01N3/32 ,  Y10T137/0396 ,  Y10T137/86389

Abstract: A system including a hydraulic accumulator, a pressure sensor, a fluid source and a data processor to detect a pre-charge pressure is provided. The hydraulic accumulator includes first and second fluid chambers and a separator therebetween. The hydraulic accumulator has an associated pre-charge pressure. The pressure sensor is connected to the first fluid chamber. The data processor is connected to the pressure sensor. The data processor is configured to determine a first and second rate of pressure changes, and a transition pressure between the first and second rates. The approximate pre-charge pressure is determined based on the transition pressure.

公开(公告)号：US20130019746A1

公开(公告)日：2013-01-24

申请号：US13574202

申请日：2011-01-03

Applicant: Ralph Engelberg

Inventor： Ralph Engelberg

IPC: F15B1/04 ,  G01L7/00

CPC classification number: F15B1/16 ,  F15B2201/315 ,  F15B2201/51

Abstract: A hydraulic accumulator includes: a pressure vessel; a hose which is situated within the pressure vessel, for receiving a first medium; a gap, which is formed between the pressure vessel and the hose, for receiving a second medium; and at least one connection for supplying and discharging the first or the second medium under pressure into or out of the hose or the gap, the supply of the first medium resulting in the compression of the second medium.

Abstract translation: 液压蓄能器包括：压力容器; 软管，其位于压力容器内，用于接收第一介质; 在压力容器和软管之间形成的用于接收第二介质的间隙; 以及用于在压力下将第一或第二介质供给和排出到软管或间隙中的至少一个连接件，第一介质的供应导致第二介质的压缩。

公开(公告)号：US4781061A

公开(公告)日：1988-11-01

申请号：US26823

申请日：1987-03-17

Applicant: Ulrich Baumgartl

Inventor： Ulrich Baumgartl

IPC: F15B1/08 ,  F15B19/00 ,  G01F19/00 ,  G01F23/14 ,  G01F17/00 ,  G01M19/00

CPC classification number: F15B19/005 ,  F15B1/08 ,  G01F19/00 ,  G01F23/14 ,  F15B2201/205 ,  F15B2201/31 ,  F15B2201/413 ,  F15B2201/51

Abstract: In a hydropneumatic accumulator, the gas volume contained therein is monitored by measuring the volume increase in the hydraulic fluid, which takes place during a pressure increase at a given minimum pressure. Moreover, for monitoring purposes, the hydraulic pressure is measured and a signal transmitted at insufficient gas volume as a function of the volume increase and the pressure increase. In order to obtain reliable signals concerning the filling state of the accumulator at all ambient operating temperatures, the temperature of the environment and the gas volume is detected, a standard value for the volume increase proportional to the ratio of the gas temperature to the minimum pressure determined and the volume increase causing the pressure increase compared to this standard value.

Abstract translation: 在液压气动蓄能器中，通过测量在给定最小压力下的压力增加期间发生的液压流体的体积增加来监测容纳在其中的气体体积。 此外，为了监视目的，测量液压并且以不足的气体体积传递的信号作为体积增加和压力增加的函数。 为了在所有环境工作温度下获得关于蓄能器的填充状态的可靠信号，检测到环境温度和气体体积，体积增加的标准值与气体温度与最小压力的比例成比例 确定并且体积增加导致与该标准值相比的压力增加。

公开(公告)号：US3195577A

公开(公告)日：1965-07-20

申请号：US14935861

申请日：1961-11-01

Applicant: GREER HYDRAULICS INC

Inventor： GREER EDWARD M

IPC: F15B1/10 ,  F15B1/16

CPC classification number: F15B1/165 ,  F15B1/10 ,  F15B2201/205 ,  F15B2201/3152 ,  F15B2201/411 ,  F15B2201/415 ,  F15B2201/43 ,  F15B2201/51

公开(公告)号：US12085096B2

公开(公告)日：2024-09-10

申请号：US18685233

申请日：2023-04-28

Applicant: GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES

Inventor： Yin Ye ,  Songwei Sheng ,  Wensheng Wang ,  Kunlin Wang

IPC: F03B13/18 ,  F15B1/04 ,  F15B13/06 ,  F03B13/14 ,  F03B13/22

CPC classification number: F15B1/04 ,  F15B13/06 ,  F03B13/14 ,  F03B13/189 ,  F03B13/22 ,  F05B2260/406 ,  F15B2201/51 ,  Y02E10/30

Abstract: An indirect hydraulic load hierarchical control system and method for a wave energy device includes a first hydraulic cylinder group, a second hydraulic cylinder group, a third hydraulic cylinder group, a high-pressure energy accumulator group, a pressure detection control module, a first hydraulic power generator set, a second hydraulic power generator set and a third hydraulic power generator set. A detection end of the pressure detection control module is used for acquiring an internal pressure of the high-pressure energy accumulator group, comparing the internal pressure with a preset pressure level, and respectively controlling the on-off of reversing valves and electromagnetic valves according to a comparison result. The present invention has the beneficial effects that all hydraulic loads can be automatically loaded or automatically unloaded, so that the wave energy device operates in a full load state or in an optimal energy conversion efficiency state.

公开(公告)号：US20240263608A1

公开(公告)日：2024-08-08

申请号：US18685233

申请日：2023-04-28

Applicant: GUANGZHOU INSTITUTE OF ENERGY CONVERSION, CHINESE ACADEMY OF SCIENCES

Inventor： Yin YE ,  Songwei SHENG ,  Wensheng WANG ,  Kunlin WANG

IPC: F15B1/04 ,  F03B13/14 ,  F15B13/06

CPC classification number: F15B1/04 ,  F15B13/06 ,  F03B13/14 ,  F15B2201/51

Abstract: An indirect hydraulic load hierarchical control system and method for a wave energy device includes a first hydraulic cylinder group, a second hydraulic cylinder group, a third hydraulic cylinder group, a high-pressure energy accumulator group, a pressure detection control module, a first hydraulic power generator set, a second hydraulic power generator set and a third hydraulic power generator set. A detection end of the pressure detection control module is used for acquiring an internal pressure of the high-pressure energy accumulator group, comparing the internal pressure with a preset pressure level, and respectively controlling the on-off of reversing valves and electromagnetic valves according to a comparison result. The present invention has the beneficial effects that all hydraulic loads can be automatically loaded or automatically unloaded, so that the wave energy device operates in a full load state or in an optimal energy conversion efficiency state.

公开(公告)号：US20180066785A1

公开(公告)日：2018-03-08

申请号：US15696517

申请日：2017-09-06

Applicant: Red Valve Company, Inc.

Inventor： Bruce M. Platusich

IPC: F16L55/053

CPC classification number: F16L55/053 ,  F15B1/08 ,  F15B11/10 ,  F15B2201/205 ,  F15B2201/411 ,  F15B2201/4155 ,  F15B2201/51 ,  F15B2211/212 ,  F15B2211/27 ,  F15B2211/7053

Abstract: A valve system includes: a valve; a hydraulic cylinder attached to at least a portion of the valve; and at least a first accumulator in fluid communication with the hydraulic cylinder. The first accumulator includes: (i) a first end having a fluid inlet and a fluid outlet; (ii) a second end having a gas inlet; and (iii) a body positioned between the first end and the second end and which includes a fluid chamber and a gas chamber separated by a flexible separating member. The hydraulic cylinder is configured to close the valve in response to pressure provided by fluid distributed from the first accumulator.

公开(公告)号：US20180043998A1

公开(公告)日：2018-02-15

申请号：US15232516

申请日：2016-08-09

Applicant: Goodrich Corporation

Inventor： William E. Luce

IPC: B64C25/22 ,  B64C25/50 ,  B64C25/34

CPC classification number: B64C25/22 ,  B64C25/34 ,  B64C25/50 ,  F15B1/265 ,  F15B2201/51 ,  F15B2211/20515 ,  F15B2211/20538 ,  F15B2211/212 ,  F15B2211/6651 ,  F15B2211/6653

Abstract: A remote hydraulic system for an aircraft may provide hydraulic fluid to nose landing gear while being isolated from the main landing gear and other main hydraulic systems of the aircraft. A supply pressure accumulator may be configured to supply hydraulic fluid to a hydraulic load of the nose gear. A pressure sensor may be configured to detect a hydraulic pressure in the supply pressure accumulator. A pump may be in fluid communication with the supply pressure accumulator and configured to switch on in response to the hydraulic pressure below a threshold value. A return pressure accumulator may be configured to store the hydraulic fluid returning from the hydraulic load. The pump may drive fluid from the return pressure accumulator to the supply pressure accumulator.

公开(公告)号：US09652902B2

公开(公告)日：2017-05-16

申请号：US14522105

申请日：2014-10-23

Applicant: GOODRICH CORPORATION

Inventor： Amir M. Fazeli ,  Adnan Cepic ,  Susanne M. Reber

IPC: G07C5/08 ,  B64D45/00 ,  B64C25/60 ,  F15B1/24 ,  F15B19/00 ,  F15B20/00

CPC classification number: G07C5/0808 ,  B64C25/60 ,  B64D45/00 ,  B64D2045/0085 ,  F15B1/24 ,  F15B19/005 ,  F15B20/005 ,  F15B2201/50 ,  F15B2201/51 ,  F15B2201/515 ,  F15B2211/625 ,  F15B2211/7054 ,  F15B2211/857

Abstract: A method includes detecting at least one position measurement of a separator piston of a pitch trim actuator. The method includes detecting at least one pressure measurement of a gas. The method includes detecting at least one temperature measurement of the gas. The method includes storing at least one position value based on the at least one position measurement of the separator piston, at least one pressure value based on the at least one pressure measurement of the gas and at least one temperature value based on the at least one temperature measurement of the gas. The method includes determining a volume of an oil within an oil chamber of the pitch trim actuator and a pressure of the gas within the gas chamber of the pitch trim actuator, based on the at least one position value, the at least one pressure value and the at least one temperature value.

公开(公告)号：US20170121944A1

公开(公告)日：2017-05-04

申请号：US15301824

申请日：2015-04-17

Applicant: Caterpillar SARL

Inventor： Shigeo Kajita ,  Kouji Kishida ,  Yoshihiko Hata ,  Nobuaki Matoba

IPC: E02F9/22 ,  F15B13/04 ,  F15B1/027 ,  F15B11/10 ,  E02F3/96 ,  E02F9/20

CPC classification number: E02F9/2242 ,  E02F3/96 ,  E02F9/2066 ,  E02F9/2075 ,  E02F9/2217 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/027 ,  F15B11/10 ,  F15B13/0416 ,  F15B2201/51 ,  F15B2211/605 ,  F15B2211/6306 ,  F15B2211/633 ,  F15B2211/6333 ,  F15B2211/6346 ,  F15B2211/6651 ,  F15B2211/6656 ,  F15B2211/6658 ,  F15B2211/7058 ,  F15B2211/763 ,  F15B2211/765

Abstract: A control device for suppressing engine load fluctuation according to main pump circuit conditions, wherein an assist torque calculation task includes a target engine torque calculation task separating smooth torque components from main pump load torque and setting a minimum value of either smooth torque component or engine setting torque as target engine torque, and a subtractor calculating target assist torque based on a difference between the main pump load torque and the target engine torque, the assist torque calculation task controlling a capacity of an assist pump based on the target assist torque and controlling switching between an assist mode and a charge mode.