WO2013023381A1 - Procédé de distribution de débit d'huile hydraulique de système hydraulique et dispositif associé - Google Patents

Procédé de distribution de débit d'huile hydraulique de système hydraulique et dispositif associé Download PDF

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Publication number
WO2013023381A1
WO2013023381A1 PCT/CN2011/078596 CN2011078596W WO2013023381A1 WO 2013023381 A1 WO2013023381 A1 WO 2013023381A1 CN 2011078596 W CN2011078596 W CN 2011078596W WO 2013023381 A1 WO2013023381 A1 WO 2013023381A1
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WO
WIPO (PCT)
Prior art keywords
oil
hydraulic oil
hydraulic
oil flow
passages
Prior art date
Application number
PCT/CN2011/078596
Other languages
English (en)
Chinese (zh)
Inventor
付新宇
易伟春
Original Assignee
长沙中联重工科技发展股份有限公司
湖南中联重科专用车有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 长沙中联重工科技发展股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 长沙中联重工科技发展股份有限公司
Priority to PCT/CN2011/078596 priority Critical patent/WO2013023381A1/fr
Publication of WO2013023381A1 publication Critical patent/WO2013023381A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements

Definitions

  • the present invention relates to the field of construction machinery, and in particular to a hydraulic oil flow distribution method and apparatus for a hydraulic system. Background technique
  • hydraulic systems typically include a plurality of oil lines and an oil pump that supplies hydraulic oil to the plurality of oil lines.
  • the pump truck includes a boom pump and a hydraulic motor connected to the boom pump and a plurality of boom cylinders, which can supply hydraulic oil to the hydraulic motor, thereby driving the turntable of the pump truck to rotate, and can give
  • the plurality of boom cylinders provide hydraulic oil to drive the boom connected to the boom cylinder. The faster the boom moves, the greater the hydraulic oil flow required for the boom cylinder connected to the boom; the slower the boom speed, the smaller the hydraulic oil flow required for the boom cylinder connected to the boom.
  • An object of the present invention is to provide a hydraulic oil flow distribution method and apparatus for a hydraulic system, which can realize a coordinated action of an action element (e.g., a boom, a turntable, etc.) corresponding to an oil passage.
  • an action element e.g., a boom, a turntable, etc.
  • the present invention provides a hydraulic oil flow distribution method for a hydraulic system, the hydraulic system including a plurality of oil passages and an oil pump for supplying hydraulic oil to the plurality of oil passages, the method comprising: calculating the oil pump Hydraulic oil flow that can be supplied; calculation of the plurality of oil paths required a hydraulic oil flow rate; and calculating a hydraulic oil flow rate that can be provided and the required hydraulic pressure when a hydraulic oil flow rate that the oil pump can provide is less than a hydraulic oil flow rate required by the plurality of oil passages A ratio between the oil flows, and for each of the plurality of oil passages, a hydraulic oil flow rate of the hydraulic oil flow required for the oil passage and the ratio is supplied to the oil passage.
  • the present invention also provides a hydraulic oil flow distribution device for a hydraulic system, the hydraulic system including a plurality of oil passages and an oil pump for supplying hydraulic oil to the plurality of oil passages, the device comprising: a first hydraulic oil flow a calculation device for calculating a hydraulic oil flow that the oil pump can provide; a second hydraulic oil flow calculation device for calculating a hydraulic oil flow required for the plurality of oil passages; and a hydraulic oil flow supply device for Calculating a ratio between the hydraulic oil flow rate that can be provided and the required hydraulic oil flow rate when the hydraulic oil flow that the oil pump can provide is less than the hydraulic oil flow rate required by the plurality of oil passages And providing, for each of the plurality of oil passages, a hydraulic oil flow rate of the hydraulic oil flow required by the oil passage and the ratio of the hydraulic oil flow to the oil passage.
  • the hydraulic oil flow of each oil passage can be proportionally distributed when the hydraulic oil flow rate that the oil pump can provide is less than the hydraulic oil flow rate required by the plurality of oil passages, so that each oil is distributed to each oil.
  • the hydraulic oil flow rate of the road is correspondingly reduced. Therefore, the action elements (for example, the boom, the turntable, etc.) corresponding to each oil path are slow, but the coordinated action is ensured, and the compound motion is realized.
  • FIG. 1 is a flow chart of a method for distributing hydraulic oil flow according to the present invention
  • Figure 2 is a graph showing the relationship between the AD value of the steering signal and the current input to the proportional valve;
  • Figure 3 is a graph showing the relationship between the applied current and the I flow when the oil pump displacement is constant;
  • FIG. 4 is a block diagram of a hydraulic oil flow distribution device provided by the present invention. Description of the reference numerals
  • the present invention provides a hydraulic oil flow distribution method for a hydraulic system, the hydraulic system including a plurality of oil passages and an oil pump for supplying hydraulic oil to the plurality of oil passages, the method comprising: Describe the hydraulic oil flow that the oil pump can provide; calculate the hydraulic oil flow required for the plurality of oil passages; and the hydraulic oil flow rate that the oil pump can provide is less than the hydraulic oil flow required for the plurality of oil passages Calculating a ratio between the hydraulic oil flow that can be provided and the required hydraulic oil flow, and providing hydraulic oil flow required for the oil passage for each of the plurality of oil passages The hydraulic oil with the product of the ratio flows to the oil passage.
  • the plurality of oil passages may include: an oil passage of the oil pump to the hydraulic motor and an oil passage of the oil pump to the at least one boom cylinder; or an oil passage of the oil pump to at least two boom cylinders.
  • the present invention is not limited to the above, and the plurality of oil passages may be oil passages in a hydraulic system in other construction machinery vehicles (such as cranes, excavators, etc.).
  • the hydraulic system includes a plurality of handles corresponding to the plurality of oil passages for controlling the amount of hydraulic oil in the oil passage, thereby controlling the movement of the action elements corresponding to the oil passages. speed.
  • the plurality of handles can be located in the cab or on the remote control of the pump truck.
  • the calculating the hydraulic oil flow required for the plurality of oil passages may include the steps of: acquiring, for each handle of the plurality of handles corresponding to the plurality of oil passages, a manipulation signal of the handle; And calculating a flow rate of the hydraulic oil corresponding to the manipulation signal; and calculating a sum of hydraulic oil flows corresponding to the manipulation signals of the plurality of handles as the hydraulic oil flow required by the plurality of oil passages.
  • each of the plurality of oil passages has a proportional valve
  • the plurality of handles are respectively used for controlling a current applied to the proportional valve to control the amount of hydraulic oil of the oil passage in which the proportional valve is located, This controls the speed of movement of the action element corresponding to the oil path.
  • Figure 2 is a graph showing the relationship between the AD value of the steering signal and the current input to the proportional valve.
  • Figure 3 is the relationship between the current applied to the proportional valve and the flow rate of the proportional valve when the displacement of the oil pump is constant. .
  • the calculation process of the hydraulic oil flow required for the plurality of oil passages will be specifically described below with reference to Figs. 2 and 3.
  • the correspondence between the AD value of the steering signal (i.e., the analog-to-digital conversion value) and the current applied to the proportional valve is as follows:
  • the dish is the dead zone of the handle, which is used to prevent the handle from shaking and to activate the action element.
  • A) mm is the minimum AD value of the steering signal (for example, can be 12), A) is the manipulation The maximum AD value of the signal (for example, 127), / when the AD value of the steering signal is ⁇ ⁇ , the current applied to the proportional valve; / when the AD value of the steering signal is AZ) max , is applied to the proportional valve Current.
  • the current applied to the proportional valve can be calculated based on the linear relationship and the AD value of the steering signal (ie, A in the equation).
  • ⁇ is the flow rate of the proportional valve when the current applied to the proportional valve is the minimum current / mn ;
  • F max is the flow rate of the proportional valve when the current applied to the proportional valve is the maximum current / hr.
  • the required hydraulic oil flow rate of the oil passage is calculated for each oil passage, and then the sum of the required hydraulic oil flow rates of the plurality of oil passages is calculated as the plurality of oil passages.
  • Required hydraulic oil flow For example, for a pump truck, the sum of the following items can be calculated as the hydraulic oil flow required for the plurality of oil passages: the hydraulic oil flow required for the left turn of the turntable, the hydraulic oil flow required for the right turn of the turntable, and each The hydraulic oil flow required for the boom to move upwards and the hydraulic oil flow required for each boom to move downward. Further, the relationship shown in Figs. 2 and 3 is merely an example, and the present invention is not limited thereto.
  • the hydraulic oil flow that the oil pump can provide is greater than or equal to the hydraulic oil flow required by the plurality of oil passages
  • the hydraulic oil flow required for each oil passage can be distributed as needed. Calculating the hydraulic oil flow rate that can be provided by the oil pump when the hydraulic oil flow rate is lower than the hydraulic oil flow rate required by the plurality of oil passages a ratio between a hydraulic oil flow that can be supplied and the desired hydraulic oil flow, and for each of the plurality of oil passages, a product of the hydraulic oil flow required for the oil passage and the ratio
  • the hydraulic oil flows to the oil circuit.
  • the hydraulic oil flow rate of the hydraulic oil flow required to provide the oil passage and the ratio of the hydraulic oil flow to the oil passage includes: applying a current corresponding to the hydraulic oil flow of the product of the ratio to the oil A proportional valve in the road, thereby controlling the flow rate of the proportional valve, gp, the hydraulic oil flow rate of the oil passage in which the proportional valve is located.
  • ⁇ is the flow required for the oil circuit, which is calculated from the manipulated signal.
  • F ALLOCATED is the hydraulic oil flow rate assigned to the oil passage, that is, the product of the hydraulic oil flow required for the oil passage and the ratio.
  • the hydraulic oil amount of each of the plurality of oil passages can be proportionally distributed, so that the action elements corresponding to the plurality of oil passages Action coordination.
  • the present invention also provides a hydraulic oil flow distribution device for a hydraulic system, the hydraulic system including a plurality of oil passages and an oil pump for supplying hydraulic oil to the plurality of oil passages, the apparatus comprising: the first hydraulic oil flow rate calculation The device 10 is configured to calculate a hydraulic oil flow that the oil pump can provide; the second hydraulic oil flow calculation device 20 is configured to calculate a hydraulic oil flow required by the plurality of oil passages; and a hydraulic oil flow supply device 30, Calculating the hydraulic oil flow that can be provided when the hydraulic oil flow that the oil pump can provide is less than the hydraulic oil flow required by the plurality of oil passages A ratio between the required hydraulic oil flows, and for each of the plurality of oil passages, a hydraulic oil flow of the hydraulic oil flow required for the oil passage and the ratio of the hydraulic oil flows to the oil passage.
  • the first hydraulic oil flow calculating device 10 calculates the hydraulic oil flow that the oil pump can provide by the following formula: q Vg xnxr ⁇ , where g is the hydraulic oil flow that the oil pump can provide, for each of the oil pumps The geometric displacement of the rotation, M is the rotation speed of the oil pump, which is the volumetric efficiency of the oil pump.
  • the second hydraulic oil flow calculation device 20 includes: a manipulation signal acquisition device, configured to acquire a manipulation signal of the handle for each of the plurality of handles corresponding to the plurality of oil passages; And a device, configured to calculate, according to the manipulation signal, a hydraulic oil flow corresponding to the manipulation signal; and a required hydraulic oil flow calculation device, configured to calculate a sum of hydraulic oil flows corresponding to the manipulation signals of the plurality of handles, Take the hydraulic oil flow required as the plurality of oil passages.
  • the plurality of oil passages include: an oil passage of the oil pump to the hydraulic motor and an oil passage of the oil pump to the at least one boom cylinder; or an oil passage of the oil pump to at least two boom cylinders.
  • each of the plurality of oil passages has a proportional valve
  • the hydraulic oil flow supply device includes: a current applying device for applying a current corresponding to the flow of the hydraulic oil of the ratio to a ratio located in the oil passage valve.
  • the hydraulic oil flow that the oil pump can provide when the hydraulic oil flow that the oil pump can provide is less than the hydraulic oil flow required by the plurality of oil passages, the hydraulic oil flow that the oil pump can provide can be proportionally distributed to each oil passage, so that The hydraulic oil flow rate assigned to each oil line is correspondingly reduced. Therefore, the action elements (e.g., the boom, the turntable, etc.) corresponding to each oil path are slow, but the coordinated action is ensured, and the compound motion is realized.
  • the action elements e.g., the boom, the turntable, etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

La présente invention se rapporte à un procédé de distribution de débit d'huile hydraulique et à un dispositif associé destinés à un système hydraulique. Le système hydraulique comprend de multiples passages d'huile et une pompe à huile d'où l'huile hydraulique est apportée aux multiples passages d'huile. Le procédé comprend les étapes suivantes consistant à : calculer le débit d'huile hydraulique apporté par la pompe à huile par un premier dispositif de calcul (10) de débit d'huile hydraulique, calculer le débit d'huile hydraulique nécessaire pour les multiples passages d'huile par un second dispositif de calcul (20) de débit d'huile hydraulique, et calculer le rapport entre le débit d'huile hydraulique apporté et le débit d'huile hydraulique nécessaire lorsque le débit d'huile hydraulique apporté par la pompe à huile est inférieur au débit d'huile hydraulique nécessaire pour les multiples passages d'huile, et concernant chacun des multiples passages d'huile, apporter le débit d'huile hydraulique qui est le produit du débit d'huile nécessaire pour les passages d'huile et du rapport au passage. La distribution proportionnelle du débit d'huile hydraulique vers chaque passage d'huile permet de réduire en conséquence le débit d'huile hydraulique distribué par le système vers chaque passage d'huile. Par conséquent, bien que l'action du composant d'actionnement correspondant à chaque passage d'huile soit faible, il est possible de coordonner action et mouvement composite complet.
PCT/CN2011/078596 2011-08-18 2011-08-18 Procédé de distribution de débit d'huile hydraulique de système hydraulique et dispositif associé WO2013023381A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/078596 WO2013023381A1 (fr) 2011-08-18 2011-08-18 Procédé de distribution de débit d'huile hydraulique de système hydraulique et dispositif associé

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Application Number Priority Date Filing Date Title
PCT/CN2011/078596 WO2013023381A1 (fr) 2011-08-18 2011-08-18 Procédé de distribution de débit d'huile hydraulique de système hydraulique et dispositif associé

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275107A (ja) * 1985-09-30 1987-04-07 Komatsu Ltd 流量制御方法及び装置
US4759183A (en) * 1985-12-30 1988-07-26 Mannesmann Rexroth Gmbh Control arrangement for at least two hydraulic loads fed by at least one pump
US4850191A (en) * 1986-12-30 1989-07-25 Mannesmann Rexroth Gmbh Control arrangement for at least two hydraulic consumers fed by at least one pump
US5193342A (en) * 1992-02-14 1993-03-16 Applied Power Inc. Proportional speed control of fluid power devices
CN101025171A (zh) * 2007-02-25 2007-08-29 江苏创导空调有限公司 工程车用液压动力空调器液压油油量分配系统
CN201443544U (zh) * 2009-04-16 2010-04-28 山推工程机械股份有限公司传动分公司 负载流量比例分配多路液压控制阀
CN201794849U (zh) * 2010-09-26 2011-04-13 四川长江液压件有限责任公司 多路换向阀流量比例分配器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275107A (ja) * 1985-09-30 1987-04-07 Komatsu Ltd 流量制御方法及び装置
US4759183A (en) * 1985-12-30 1988-07-26 Mannesmann Rexroth Gmbh Control arrangement for at least two hydraulic loads fed by at least one pump
US4850191A (en) * 1986-12-30 1989-07-25 Mannesmann Rexroth Gmbh Control arrangement for at least two hydraulic consumers fed by at least one pump
US5193342A (en) * 1992-02-14 1993-03-16 Applied Power Inc. Proportional speed control of fluid power devices
CN101025171A (zh) * 2007-02-25 2007-08-29 江苏创导空调有限公司 工程车用液压动力空调器液压油油量分配系统
CN201443544U (zh) * 2009-04-16 2010-04-28 山推工程机械股份有限公司传动分公司 负载流量比例分配多路液压控制阀
CN201794849U (zh) * 2010-09-26 2011-04-13 四川长江液压件有限责任公司 多路换向阀流量比例分配器

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