CN105813873B - 包括升压泵和使用真空的排放装置的液压回路 - Google Patents

包括升压泵和使用真空的排放装置的液压回路 Download PDF

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CN105813873B
CN105813873B CN201480067125.4A CN201480067125A CN105813873B CN 105813873 B CN105813873 B CN 105813873B CN 201480067125 A CN201480067125 A CN 201480067125A CN 105813873 B CN105813873 B CN 105813873B
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hydraulic circuit
booster
tension loop
pressure
fluid
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CN105813873A (zh
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A·勒德朗
F·罗伊
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Technoboost SAS
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/005—Filling or draining of fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4104—Flushing, e.g. by using flushing valves or by connection to exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4139—Replenishing or scavenging pumps, e.g. auxiliary charge pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4174—Control of venting, e.g. removing trapped air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/047—Preventing foaming, churning or cavitation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/61—Secondary circuits
    • F15B2211/613—Feeding circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/89—Control specific for achieving vacuum or "negative pressure"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4096—Fluid exchange between hydrostatic circuits and external sources or consumers with pressure accumulators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

本发明涉及一种液压回路，所述液压回路包括与高压回路(2)以及与低压回路(16)连接的装备，并且包括升压系统，所述升压系统包括泵(20)，所述泵从容器(22)中提取流体以用于供应给低压回路，从而维持最小压力，其特征在于，所述液压回路包括：在高压回路(2)上抽真空的抽真空部件(30)；布置在低压回路(16)与高压回路(2)之间的允许通向高压的连通止回阀(32)；和泵(34)的卡挡部件。

Description

包括升压泵和使用真空的排放装置的液压回路
技术领域
本发明涉及包括升压泵和排放装置的液压回路，以及涉及包括这种液压回路的混合动力机动车辆和该液压回路的填充和排放方法。
背景技术
液压回路通常包括从低压部分接收流体的泵，以用于将低压流体压送至高压部分中并且将流体存储在压力蓄能器中，从而为至少一个接收器供应，所述至少一个接收器包括朝向低压部分的回复。
在工业中使用或者用于不同类型的车辆(尤其用于液压混合动力机动车辆的牵引)的该类型的液压回路能够包括由升压装置维持在最小压力上的低压部分，以用于在该最小压力下为泵供应，从而尤其在流量最大时避免流体的空穴现象。
尤其由文件FR-A1-2978506示出的已知的升压系统包括从大气压下的容器中提取流体的升压泵，该容器的轴与高压泵的轴连接以用于由电动机来驱动。
可被使用的另一种升压系统不消耗电能，该升压系统包括由高压回路供应的液压发动机，所述液压发动机驱动从大气压下的容器中提取流体的升压泵旋转，以用于将流体压送至低压回路中。
然而该类型的液压回路相对复杂(尤其对于混合动力车辆的牵引)，该类型的液压回路通常需要在生产这些回路的车间中进行组装和测试，以确保该类型的液压回路的良好运行。因此需在所述车间中完整地组装该回路、为该回路填充以及排放，以用于在正常运行条件下执行这些测试。
然后在一些情况下(尤其对于混合动力车辆的运输和安装)，需通过切断管道来分开回路的一些元件，这断开了该回路并且将空气引入该回路中。然后在组装该回路之后，需使该回路被填满并且执行新的排放。
然而，包括升压泵的该类型的回路产生了尤其是高压和低压两个回路的排放的特定问题(通常需要使这两个回路被排放，然后通过为每个回路供应流体来执行每个回路的填充)。同样，当售后的介入需要断开回路时，然后需实施新的排放。
该类型的回路的排放相对复杂，需要一些时间，导致较高成本以及存在质量缺陷的风险。
发明内容
本发明的目的尤其在于避免现有技术的这些缺陷。
本发明为此提供了一种液压回路，所述液压回路包括与高压回路以及与低压回路连接的装备，所述装备例如产生高压的系统、压力蓄能器和接收器，并且所述液压回路包括升压系统，所述升压系统包括泵，所述泵从容器中提取流体以用于供应给低压回路，从而维持最小压力，其特征在于，所述液压回路包括：在高压回路上抽真空的抽真空部件；布置在低压回路与高压回路之间的允许通向高压的连通止回阀；和泵的卡挡部件。
该液压回路的优点在于方式简单及有效，通过在泵被卡挡时由抽真空部件执行抽真空，同时实现低压回路中的真空，所述低压回路将通过止回阀的空气发送到高压回路中，在抽真空时，被卡挡的泵阻止来自该低压回路中的容器的流体的上升。
一旦执行了抽真空并且抽孔被关闭，仅需解除对泵的卡挡，通过使自由泵转动，低压回路的真空部从容器中吸入流体，高压回路借助于使流体在该方向通过的止回阀而被同时填充。
根据本发明的液压回路还可包括可彼此组合的一个或多个以下特征。
有利地，所述抽真空部件包括通向外部的孔，所述孔上装配有允许通向外部的止回阀。
根据一种实施方式，升压泵的卡挡部件直接作用在所述泵上。
根据另一种实施方式，升压泵的卡挡部件作用在驱动所述泵的发动机上。
更具体地，升压泵可由液压发动机驱动。
在该情况下，液压发动机有利地由高压回路供应，并且将流体压送至低压回路中。
有利地，泵的卡挡部件包括闭锁器、制动器和接合套(crabot)。
更具体地，所述液压回路可包括动力系统，所述动力系统设置用于实施机动车辆的牵引。
本发明的目的还在于提供一种包括液压回路的混合动力车辆，所述混合动力车辆布置有设置用于牵引所述混合动力车辆的动力系统，该液压回路包括任意其中一项上述特征。
本发明的目的还在于提供一种液压回路的排放方法，所述液压回路包括任意其中一项上述特征，所述排放方法包括以下步骤，首先泵通过卡挡部件被卡挡，所述泵的汲水容器被填充，然后由抽真空部件抽真空，最后解除对所述泵的卡挡。
附图说明
通过阅读以下作为非限制性示例给出的详细说明和附图，本发明的其它特征和优点将更加清楚，在附图中：
-图1为示出了布置有升压泵的液压回路的简化示意图；以及
-图2为示出了根据本发明的装配有排放装置的该液压回路的简化示意图。
具体实施方式
图1示出了设置用于牵引混合动力机动车辆的液压回路，所述液压回路包括布置有气体压力蓄能器4高压回路2，所述气体压力蓄能器与电动阀6连接。
高压回路2通过第二电动阀10为动力系统8供应，所述动力系统包括牵引车辆的液压机12，所述液压机在低压回路16中排出流体。安全止回阀14与液压发动机12并联布置，所述安全止回阀允许流体仅通向高压回路2。
与驱动轮连接的液压机12能够作为发动机运行，以通过提取来自压力蓄能器4的流体来驱动车辆，或者作为泵运行，以使车辆制动并且为该蓄能器充能，从而回收车辆的动能。
所述液压回路可根据混合动力机动车辆的类型包括其它未示出的元件，例如由内燃机驱动的液压泵。
所述高压回路2还为小功率液压发动机18供应，所述小功率液压发动机直接驱动从大气压下的容器22中汲取流体的液压泵20，以用于将流体压送至低压回路16中，从而保持能够避免该回路中的空穴现象的最小压力。液压发动机18通过管道24将流体压送至低压回路16中。
因此得到由升压泵20产生的低压的自动调节，所述自动调节取决于高压回路与低压回路之间的压力差。低压回路16中的极小压力增大了发动机18的功率，这提升了泵20的速度以及该压力的等级。相反，低压回路16中的极大压力减小了该泵20的速度，这重新降低了该压力等级。
低压回路16中的压力限制阀26与升压泵20并联布置，所述压力限制阀包括整定弹簧，如果低压明显过大以将流体压送至容器22中，所述整定弹簧打开该阀，这确保了安全性。
高压回路2和低压回路16通过不同元件(例如液压发动机18和动力系统8)彼此连接，所述不同元件不允许这两个回路之间的自由通道。
在安装之后或者为了实施保养操作，这种回路的排放时间相对较长并且复杂。尤其需断开两个回路2、16中的每个，以用于实施内部真空，然后通过使每个回路与包括流体的容器连通来为所述两个回路填充该流体。
图2示出了同一类型的液压回路，该液压回路还包括：在高压回路2上的用于抽真空的孔30，所述孔装配有仅允许空气输出以形成真空(由箭头F表示)的输出止回阀；布置在低压回路16与高压回路2之间的连通止回阀32，所述连通止回阀仅允许从低压通向高压；和泵20的卡挡部件34。
用于抽真空的孔30可具有双重密封性，带有避免全部损失的密封舱，或者具有可损失几滴流体的简单密封性。由于该孔仅使引起极少负载损失的空气被抽出，该孔的通过截面可较小。
泵20的卡挡装置34尤其可包括在该示例中直接作用在液压发动机18的轴上的闭锁器、制动器和接合套，所述液压发动机的轴与该泵的轴直接连接。作为变型，卡挡部件34可直接作用在泵20上。
有利地，包括填充孔和排出孔的容器22在为生产所述回路的车间中的测试所执行的初始填充之后保持填满，升压泵20被卡挡，然后该状态下的所述容器与所述回路的剩余部分一起被安装在车辆中。
在实施这些车辆的最终组装的车间中被全部安装在车辆中的液压回路的填充和排放方法如下所述。
泵20通过卡挡部件34和被填充的汲水容器22被卡挡，借助于包括真空泵的车间工具通过抽孔30执行抽真空，该孔的阀仅允许在该方向上通过。
因此，同时在高压回路2和低压回路16中吸取通过连通阀32的空气，所述连通阀允许在该方向上通过。注意到泵20被卡挡，该泵不使来自容器22的流体通向低压回路16。
一旦实现真空，通过作用在卡挡部件34上而解除对泵20的卡挡，这能够使两个回路2、16的真空部吸入来自容器22并且通过可自由转动的该泵以及通过连通阀32的流体，以用于填充高压回路。因此得到完全且快速的填充以及通过单一操作执行的液压回路的排放。
该泵可具有抽真空时的使较少流体通过的小流量泄漏，这在该泵被浸没的情况下没有妨碍，可确保该泵不吸入空气。
注意到当将在高压回路2中施加压力时，抽孔30的止回阀将自动保持关闭。
更具体地，在第一组装和运行测试之后，可通过使液压泵20被止挡以及使容器20被填充流体来设置液压回路。因此当液压回路被最终组装在混合动力车辆中时限制要实施的操作的数量，以使该组装具有可操作性。
通过该方法确保了节省时间并且因此节省成本，以及确保了需要单一操作的填充和排放的安全性。因此避免了可在需进行多次操作以执行完全填充和排放的情况下出现的疏漏，并且可使在车辆组装车间中执行的最终操作最少化。
通常，该排放方法还能够运用于在工业中或者在别处使用的液压回路。

Claims (11)

1.一种液压回路，所述液压回路包括与高压回路(2)以及与低压回路(16)连接的装备，并且所述液压回路包括升压系统，所述升压系统包括升压泵(20)，所述升压泵从容器(22)中提取流体以用于供应给低压回路，从而维持最小压力，其特征在于，所述液压回路包括：在高压回路(2)上抽真空的抽真空部件；布置在低压回路(16)与高压回路(2)之间的允许通向高压的连通止回阀(32)；和升压泵的卡挡部件。
2.根据权利要求1所述的液压回路，其特征在于，所述抽真空部件包括通向外部的孔(30)，所述孔上装配有允许通向外部的止回阀。
3.根据权利要求1或2所述的液压回路，其特征在于，升压泵的卡挡部件直接作用在所述升压泵上。
4.根据权利要求1或2所述的液压回路，其特征在于，升压泵的卡挡部件作用在驱动所述升压泵(20)的液压发动机(18)上。
5.根据权利要求1所述的液压回路，其特征在于，升压泵(20)由液压发动机(18)驱动。
6.根据权利要求5所述的液压回路，其特征在于，液压发动机(18)由高压回路(2)供应，并且将流体压送至低压回路(16)中。
7.根据权利要求1、2、5、6中任一项所述的液压回路，其特征在于，升压泵的卡挡部件包括闭锁器、制动器和接合套。
8.根据权利要求1、2、5、6中任一项所述的液压回路，其特征在于，所述液压回路包括动力系统(8)，所述动力系统设置用于实施机动车辆的牵引。
9.根据权利要求1所述的液压回路，其特征在于，所述装备是产生高压的系统、压力蓄能器(4)和接收器。
10.一种包括液压回路的混合动力车辆，所述混合动力车辆布置有设置用于牵引所述混合动力车辆的动力系统(8)，其特征在于，所述液压回路根据上述权利要求中任一项实施。
11.一种液压回路的排放方法，所述液压回路根据权利要求1至9中任一项实施，其特征在于，所述排放方法包括以下步骤，首先升压泵(20)通过卡挡部件(34)被卡挡，所述升压泵的汲水容器(22)被填充，然后由抽真空部件抽真空，最后解除对所述升压泵的卡挡。
CN201480067125.4A 2013-12-12 2014-11-07 包括升压泵和使用真空的排放装置的液压回路 Expired - Fee Related CN105813873B (zh)

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GB1214511A (en) * 1966-12-09 1970-12-02 Smil Reis Self-changing four-speed hydrostatic trnsmissions
US5775103A (en) * 1993-05-25 1998-07-07 Ingvast; Hakan Apparatus for purifying a fluid by vacuum treatment
WO2010091896A8 (de) * 2009-02-16 2012-03-08 Martin Maszull Anschlusskupplung für eine entlüftungsschraube eines hydrauliksystems
CN102900643A (zh) * 2011-07-29 2013-01-30 波克兰液压工业设备公司 液压控制回路
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