WO2013123794A1 - Réservoir d'huile hydraulique maintenu sous pression - Google Patents

Réservoir d'huile hydraulique maintenu sous pression Download PDF

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Publication number
WO2013123794A1
WO2013123794A1 PCT/CN2012/085822 CN2012085822W WO2013123794A1 WO 2013123794 A1 WO2013123794 A1 WO 2013123794A1 CN 2012085822 W CN2012085822 W CN 2012085822W WO 2013123794 A1 WO2013123794 A1 WO 2013123794A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
pressure
tank
hydraulic oil
oil tank
Prior art date
Application number
PCT/CN2012/085822
Other languages
English (en)
Chinese (zh)
Inventor
张军
胡孝新
沈亮
Original Assignee
湖南三一智能控制设备有限公司
三一重机有限公司
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 湖南三一智能控制设备有限公司, 三一重机有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2013123794A1 publication Critical patent/WO2013123794A1/fr

Links

Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/196—Equalising valves predominantly for tanks spring-loaded
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • F15B1/265—Supply reservoir or sump assemblies with pressurised main reservoir

Definitions

  • the utility model relates to the technical field of exhaust gas suction of a hydraulic oil tank, in particular to a pressure-maintaining hydraulic oil tank applied to a hydraulic excavator. Background technique
  • the hydraulic oil tank used by the excavator is provided with a breathing valve that vents outward and inhales.
  • a breathing valve that vents outward and inhales.
  • the hydraulic oil returns to the hydraulic tank, and the gas in the hydraulic tank passes.
  • the breathing valve is discharged outward.
  • the cylinder on the working device is extended, the hydraulic oil enters the cylinder from the hydraulic oil tank, and the breathing valve inhales from the outside to the hydraulic oil tank.
  • auxiliary breathing and suction are set in the breathing valve. Gas spring. As shown in Fig. 1, an exhaust gas breathing valve 1 is arranged above the hydraulic oil tank 0.
  • the purpose of the utility model is to provide a new pressure-maintaining hydraulic oil tank, which can effectively avoid oil and gas
  • Replacement page (Article 26) Squeeze out the surface of the contaminated tank and air into the tank to contaminate the hydraulic fluid.
  • a pressure-maintaining hydraulic oil tank includes a tank body, a filter core assembly is disposed in the tank body, a breathing valve is disposed at a top of the tank body, the breathing valve includes a valve body, and the valve body has a hollow cavity body, a valve seat is disposed at a bottom of the valve body, a valve stem is passed through the hollow body, and a filter element is further disposed on the valve body, the filter element is disposed through a hole provided in the inner wall of the hollow cavity a hollow body is connected to the valve body; an exhaust spring is disposed on the valve stem, and an air inlet spring is disposed on the valve seat, wherein the breathing valve is a non-exhaust breathing valve.
  • the opening pressure of the exhaust spring is greater than the maximum internal pressure of the hydraulic tank.
  • the filter cartridge assembly includes an oil absorbing filter cartridge assembly and a return oil filter cartridge assembly.
  • the filter element has a circular ring shape and is sleeved on the valve body.
  • the opening pressure of the exhaust spring is 0.05 MPa.
  • the utility model isolates the oil tank from the outside atmosphere, does not exchange air, avoids the oil gas from being discharged outward and the air entering the fuel tank to pollute the hydraulic oil, and is convenient to use and practical.
  • FIG. 1 is a schematic structural view of a hydraulic oil tank in the related art
  • FIG. 2 is a schematic structural view of a pressure maintaining hydraulic oil tank provided by an embodiment of the present invention
  • FIG. 3 is a schematic structural view of a breathing valve in the pressure maintaining hydraulic oil tank shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • the pressure-holding hydraulic oil tank of the embodiment of the present invention comprises a box body 2, wherein a common filter element assembly (not shown in the figure) is disposed in the box body 2, and the filter element assembly includes an oil-absorbing filter element. Assembly and return filter assembly.
  • a breathing valve 1 is provided at the top of the casing 2.
  • valve body 11 has a hollow body 15 , the bottom of the valve body 11 is provided with a valve seat 12 , the valve stem 13 passes through the hollow cavity 15 , and the valve body 11 is further provided with a filter core 14 , the filter core 14
  • the hole 16 is communicated with the hollow body 15 through a hole 16 provided in the inner wall of the hollow body 15; specifically, the filter element 14 has a circular ring shape and is sleeved on the valve body 11.
  • the valve stem 13 is sleeved with an exhaust spring 17, and the valve seat 12 is provided with an air spring 18, wherein the breathing valve 1 is a non-exhaust breathing valve, and the selected exhaust spring 17
  • the opening pressure is greater than the maximum internal pressure of the pressure-holding hydraulic oil tank, that is, the internal pressure of the fuel tank when the maximum oil return amount of the system is greater.
  • the adjustment of the opening pressure can be realized by changing the stiffness of the spring.
  • the opening pressure of the exhaust spring 17 is a larger value (greater than the opening pressure of the prior art), for example, 0.05 MPa (the opening pressure in the prior art is 0.01 MPa).
  • the working principle is that when the cylinder is retracted and the hydraulic oil returns to the tank, since the exhaust opening pressure of the breathing valve 1 is higher than the internal pressure of the tank, the tank cannot be exhausted outward, the volume of the gas is compressed, the pressure is increased, and the oil and gas are prevented from being outward.
  • the cylinder is extended and the hydraulic oil enters the cylinder, the volume of the gas in the tank increases, the pressure decreases, and the internal pressure of the tank stored when returning to the oil is released, without the need to replenish through the external atmosphere, thereby preventing the hydraulic oil from being contaminated.
  • the pressure-holding hydraulic oil tank of the embodiment of the present invention can be isolated from the outside atmosphere without air exchange, and the oil gas is prevented from being sprayed out of the surface of the fuel tank and the air entering the fuel tank to pollute the liquid pressure oil, which is convenient to use and practical.
  • the utility model provides a pressure-maintaining hydraulic oil tank, which can prevent the oil and gas from being sprayed out of the surface of the contaminated oil tank and the air entering the oil tank to contaminate the hydraulic oil. Therefore, the utility model has industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
  • Safety Valves (AREA)

Abstract

La présente invention se rapporte à un réservoir d'huile hydraulique maintenu sous pression qui comprend un corps de réservoir (2). Un ensemble filtre est disposé dans le corps de réservoir (2). Une vanne de mise à l'air (1) est disposée au niveau de la partie supérieure du corps de réservoir (2). La vanne de mise à l'air (1) comprend un corps de vanne (11). Le corps de vanne (11) comporte une cavité creuse (15) et présente une partie inférieure qui est pourvue d'un siège de vanne (12). Une tige de vanne (13) traverse la cavité creuse (15). Le corps de vanne (11) est en outre pourvu d'un filtre (14). Le filtre (14) est en communication avec la cavité creuse (15) au moyen d'un canal agencé dans une paroi interne de la cavité creuse (15). Dans la cavité creuse (15), un ressort d'échappement (17) entoure la tige de vanne (13). Un ressort d'admission de gaz (18) est disposé sur le siège de vanne (12). La vanne de mise à l'air (1) est une vanne de mise à l'air sans échappement. Le ressort d'échappement sélectionné satisfait la condition selon laquelle la pression d'ouverture du ressort d'échappement (17) est plus importante que la pression interne maximale du réservoir d'huile hydraulique. Le réservoir d'huile est isolé de l'atmosphère et n'effectue pas d'échange d'air, de sorte à empêcher la vapeur d'huile d'être pulvérisée à l'extérieur et l'air d'entrer dans le réservoir d'huile pour contaminer l'huile hydraulique. La présente invention est utilisée de façon commode.
PCT/CN2012/085822 2012-02-23 2012-12-04 Réservoir d'huile hydraulique maintenu sous pression WO2013123794A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201220059951.2 2012-02-23
CN 201220059951 CN202520671U (zh) 2012-02-23 2012-02-23 一种保压液压油箱

Publications (1)

Publication Number Publication Date
WO2013123794A1 true WO2013123794A1 (fr) 2013-08-29

Family

ID=47103623

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/085822 WO2013123794A1 (fr) 2012-02-23 2012-12-04 Réservoir d'huile hydraulique maintenu sous pression

Country Status (2)

Country Link
CN (1) CN202520671U (fr)
WO (1) WO2013123794A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026908A (zh) * 2018-08-31 2018-12-18 浙江车夫建筑装饰工程有限公司 一种市政工程用液压站

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202520671U (zh) * 2012-02-23 2012-11-07 三一重机有限公司 一种保压液压油箱
CN103334989A (zh) * 2013-07-08 2013-10-02 三一矿机有限公司 一种液压油箱内部压力控制系统及矿用自卸车
DE102015221508A1 (de) * 2015-11-03 2017-05-04 Mahle Industriefiltration Gmbh Druckausgleichseinrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09119541A (ja) * 1995-10-24 1997-05-06 Hitachi Constr Mach Co Ltd 作動油タンク用エアブリーザ
CN2413112Y (zh) * 2000-03-21 2001-01-03 昌河飞机工业（集团）有限责任公司 油箱呼吸盖
JP2004360769A (ja) * 2003-06-03 2004-12-24 Toyota Industries Corp フォークリフト用作動油タンクのブリーザ装置
WO2009143310A1 (fr) * 2008-05-21 2009-11-26 Parker-Hannifin Corporation Reniflard pour système de fluide hydraulique, avec voies d’écoulement d’air d'admission et de sortie indépendantes
CN201713850U (zh) * 2010-02-03 2011-01-19 浙江濠泰重工制造有限公司 自呼吸式油箱盖
CN201866354U (zh) * 2010-11-23 2011-06-15 三一重机有限公司 一种呼吸阀
CN102116325A (zh) * 2009-12-30 2011-07-06 斗山工程机械（中国）有限公司 一种液压油箱的呼吸器及工程机械
CN202520671U (zh) * 2012-02-23 2012-11-07 三一重机有限公司 一种保压液压油箱

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09119541A (ja) * 1995-10-24 1997-05-06 Hitachi Constr Mach Co Ltd 作動油タンク用エアブリーザ
CN2413112Y (zh) * 2000-03-21 2001-01-03 昌河飞机工业（集团）有限责任公司 油箱呼吸盖
JP2004360769A (ja) * 2003-06-03 2004-12-24 Toyota Industries Corp フォークリフト用作動油タンクのブリーザ装置
WO2009143310A1 (fr) * 2008-05-21 2009-11-26 Parker-Hannifin Corporation Reniflard pour système de fluide hydraulique, avec voies d’écoulement d’air d'admission et de sortie indépendantes
CN102116325A (zh) * 2009-12-30 2011-07-06 斗山工程机械（中国）有限公司 一种液压油箱的呼吸器及工程机械
CN201713850U (zh) * 2010-02-03 2011-01-19 浙江濠泰重工制造有限公司 自呼吸式油箱盖
CN201866354U (zh) * 2010-11-23 2011-06-15 三一重机有限公司 一种呼吸阀
CN202520671U (zh) * 2012-02-23 2012-11-07 三一重机有限公司 一种保压液压油箱

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109026908A (zh) * 2018-08-31 2018-12-18 浙江车夫建筑装饰工程有限公司 一种市政工程用液压站
CN109026908B (zh) * 2018-08-31 2022-02-08 浙江车夫建筑装饰工程有限公司 一种市政工程用液压站

Also Published As

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