US20070062367A1 - Hydraulic control - Google Patents

Hydraulic control Download PDF

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Publication number
US20070062367A1
US20070062367A1 US11/469,355 US46935506A US2007062367A1 US 20070062367 A1 US20070062367 A1 US 20070062367A1 US 46935506 A US46935506 A US 46935506A US 2007062367 A1 US2007062367 A1 US 2007062367A1
Authority
US
United States
Prior art keywords
valve
hydraulic
pressure
control
telescopic cylinder
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/469,355
Other languages
English (en)
Inventor
Michel Machado-Damasceno
Luiz Simoes-Rocha
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sauer Danfoss Hidraulica Mobil Ltda
Original Assignee
Sauer Danfoss Hidraulica Mobil Ltda
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 Sauer Danfoss Hidraulica Mobil Ltda filed Critical Sauer Danfoss Hidraulica Mobil Ltda
Assigned to SAUER-DANFOSS HIDRAULICA MOBIL LTDA. reassignment SAUER-DANFOSS HIDRAULICA MOBIL LTDA. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MACHADO-DAMASCENO, MICHEL ANGELO, SIMOES-ROCHA, LUIZ ROBERT
Publication of US20070062367A1 publication Critical patent/US20070062367A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • B65F3/24—Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle
    • B65F3/28—Vehicles particularly adapted for collecting refuse with devices for unloading the tank of a refuse vehicle by a lengthwise movement of a wall, e.g. a plate, a piston, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • B65F3/14—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle
    • B65F3/20—Vehicles particularly adapted for collecting refuse with devices for charging, distributing or compressing refuse in the interior of the tank of a refuse vehicle with charging pistons, plates, or the like
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating 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
    • F15B2211/30—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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure valve
    • 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/78—Control of multiple 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/783—Sequential control

Definitions

  • This disclosure relates to hydraulic control systems used in trucks and refuse compactor.
  • the refuse collectors and compactors in use in the market show a few problems related to the ability to compact refuse, that is, problems in getting a higher density of refuse per cubic meter of container ( 12 ) during the collection operation. Since the means of transmission of force and power used to drive the compacting mechanism is fit within the collection vehicle, a hydraulic system uses the increase of hydraulic pressure in the main work to get a greater hydraulic power and, as a result of it, a greater force in compacting the refuse. As a mechanic resistance limits the container, the truck structure may be damaged in case high forces overcome such resistance.
  • the operator concentrates the load of collected residue mainly in the rear axle, thus causing discomfort to the driver, insecurity while driving the vehicle, besides compromising the service life and maintenance of the road.
  • the operator tries to solve this problem by causing the “rubber nipple” effect, which takes place as the operator drives the directional valve and releases the flow of hydraulic oil for the telescopic cylinder to open while keeping the lid kit closed.
  • Such drive and action compromise the service life of the equipment as well as the operator safety, as mechanical parts, not designed to compact residue, are used for this purpose.
  • a directional control with a pressure sequence valve and a pressure compensation valve is proposed, to allow the pressure induced in the telescopic hydraulic cylinder by the action of the compacting work to be constant and independent in the course the different stages/areas of the telescopic cylinder.
  • This pressure varies according to the force of compacting and the area of the telescopic cylinder in operation.
  • a homogeneous compacting of the residue is obtained.
  • the “rubber effect” can still occur this way.
  • the hydraulic system already known in the state of the art, includes:
  • Telescopic hydraulic cylinder
  • the request on privilege of invention described hereon aims at solving the problems present in the state of the art, thus proposing a hydraulic directional control.
  • the hydraulic directional control proposed hereon provides, besides the already existing items, a piloted pressure sequence valve, a pressure compensation valve with a calibrated vent to control the flow and a externally piloted retention valve.
  • the request hereon is about privilege of invention of a hydraulic control used in trucks and refuse compactor.
  • the refuse collectors and compactors in use in the market show a few problems related to the ability to compact refuse, that is, problems in getting a higher density of refuse per cubic meter of container ( 12 ) during the collection operation. Since the means of transmission of force and power used to drive the compacting mechanism is fit within the collection vehicle, a hydraulic system uses the increase of hydraulic pressure in the main work to get a greater hydraulic power and, as a result of it, a greater force in compacting the refuse. As a mechanic resistance limits the container, the truck structure may be damaged in case high forces overcome such resistance.
  • the operator concentrates the load of collected residue mainly in the rear axle, thus causing discomfort to the driver, insecurity while driving the vehicle, besides compromising the service life and maintenance of the road.
  • the operator tries to solve this problem by causing the “rubber nipple” effect, which takes place as the operator drives the directional valve and releases the flow of hydraulic oil for the telescopic cylinder to open while keeping the lid kit closed.
  • Such drive and action compromise the service life of the equipment as well as the operator safety, as mechanical parts, not designed to compact residue, are used for this purpose.
  • a directional control is proposed with a pressure sequence valve and a pressure compensation valve, to allow the pressure induced in the telescopic hydraulic cylinder by the action of the compacting work to be constant and independent in the course the different stages/areas of the telescopic cylinder.
  • This pressure varies according to the force of compacting and the area of the telescopic cylinder in operation.
  • a homogeneous compacting of the residue is obtained.
  • the “rubber effect” can still occur this way.
  • the hydraulic system already known in the state of the art, includes:
  • Telescopic hydraulic cylinder
  • the request on privilege of invention described hereon aims at solving the problems present in the state of the art, thus proposing a hydraulic directional control.
  • the hydraulic directional control proposed hereon provides, besides the already existing items, a piloted pressure sequence valve, a pressure compensation valve with a calibrated vent to control the flow and a externally piloted retention valve.
  • FIG. 1 represents a lateral view of a refuse collector truck ( 1 ) where one can notice the location of the hydraulic control ( 2 );
  • FIG. 2 represents a perspective view of the hydraulic control ( 2 );
  • FIG. 3 represents a perspective view of another angle of the hydraulic control ( 2 );
  • FIG. 4 represents a cross sectional view of the hydraulic control ( 2 ) indicating the externally and/or internally piloted pressure sequence valve ( 21 );
  • FIG. 5 represents a cross sectional view of the hydraulic control ( 2 ), where one can notice the location of the pressure compensating valve with calibrated hole to control the flow ( 22 );
  • FIG. 6 represents a cross sectional view of the piloted retention valve ( 20 ), known as anti-rubber nipple valve”, where all its components can be observed;
  • FIG. 7 represents a lateral sectional view of the hydraulic control ( 2 ), where one can notice the position of the piloted retention valve ( 20 );
  • FIG. 8 represents a lateral sectional view of the hydraulic control ( 2 ), where one can notice when the piloted retention valve ( 20 ) is not used, being replaced by a lid set ( 24 ).
  • FIG. 9 is a representation of the hydraulic system ( 3 ) where one can notice the location of the piloted retention valve ( 20 ), known as “anti-rubber nipple” and the location of the externally piloted pressure sequence valve ( 21 ).
  • FIG. 10 is a representation of the hydraulic system ( 3 ), where one can notice the location of the piloted retention valve ( 20 ), known as anti-rubber nipple and the location of the internally piloted pressure sequence valve ( 21 ).
  • anti-rubber nipple In some applications the use of the piloted retention valve, known as “anti-rubber nipple”, will be unnecessary.
  • FIG. 11 is a representation of the hydraulic system ( 3 ), where one can notice the location of the lid set ( 24 ) and the location of the externally piloted pressure of the regulation valve ( 21 ) (hydraulic circuit).
  • FIG. 12 is a representation of the hydraulic system ( 3 ), where one can notice the location of the lid set ( 24 ) and the internally piloted pressure of the regulatory valve ( 21 ).
  • the piloted retention valve ( 20 ) comprises the body of a valve ( 23 ), a buffer ( 24 ) a connection for the pilot line ( 25 ), a piston ( 26 ), a limiter ( 27 ), a plunger ( 28 ) and a spring ( 29 ).
  • the piston ( 26 ) is kept against a center place in the body of the valve ( 23 ) through the action of a spring ( 29 ). Its function is to allow the free flow of fluid in one direction and keep it from going the opposite way. Note that an increase of pressure on the piston ( 26 ) in the non-allowed direction of the flow tends to push the piston ( 26 ) against the center place, thus enhancing the blocking.
  • an externally and/or internally piloted pressure sequence valve ( 21 ) and a pressure compensation valve with calibrated hole to control the flow ( 22 ) we managed to get an increase of cargo (greater residue density per cubic meter) at the work main low pressure. Both valves are part of the hydraulic pressure control induced in the telescope.
  • the externally and/or internally piloted pressure sequence valve ( 21 ) is responsible, at being piloted by the hydraulic pressure of the hydraulic cylinders ( 11 ) of the compactor, for liberating just the pressure induced in the telescopic cylinder to the pressure compensating valve with calibrated hole to control the flow ( 22 ), responsible for keeping the resulting pressure stable and controlling it so as to allow a minimum reduction of induced pressure and consecutively a small retreat of the stage of the telescopic cylinder in operation.
  • the volume of the container is increased when the retreat of the stage of the telescopic cylinder in operation is released ( 12 ), that is, a greater volume is created within the container ( 12 ) so that more residue may be compacted.
  • This pressure compensating valve ( 22 ) with calibrated hole keeps the induced hydraulic pressure of the telescopic cylinder under control. This induced pressure is obtained according to the areas of the stages of the telescopic cylinder in operation, as a result of the force of compacting applied. A constant and homogeneous compacting is obtained in each stage of the telescopic cylinder from the operation of this valve.
  • the piloted retention optional valve ( 20 ) provides the effect called “anti-rubber nipple”.
  • the piloted retention valve ( 20 ) will allow the passage of hydraulic oil only to the telescopic cylinder and consequently the opening of this telescopic cylinder so that the compacted residue may be ejected through the ejecting system ( 14 ), outside the container ( 12 ) if the lid set ( 13 ) of the compactor is open. This is because the hydraulic pressure induced by the hydraulic cylinder ( 11 ) that opens the lid set ( 13 ) is what generates the piloting hydraulic pressure liberating the hydraulic flow to open the telescopic cylinder.
  • a directional hydraulic valve in the hydraulic line between the cylinder that lifts the lid set ( 13 ) and the pilot line of the piloted retention valve ( 20 ) is needed.
  • the lid set must drive this directional valve mechanically and/or electrically ( 13 ).
  • the pilot line of the piloted retention valve ( 20 ) must be connected to the hydraulic oil tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Control Of Fluid Gearings (AREA)
US11/469,355 2005-09-02 2006-08-31 Hydraulic control Abandoned US20070062367A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0504163-5 2005-09-02
BRPI0504163 2005-09-02

Publications (1)

Publication Number Publication Date
US20070062367A1 true US20070062367A1 (en) 2007-03-22

Family

ID=37507647

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/469,355 Abandoned US20070062367A1 (en) 2005-09-02 2006-08-31 Hydraulic control

Country Status (7)

Country Link
US (1) US20070062367A1 (es)
EP (1) EP1760327A3 (es)
CN (1) CN1923501A (es)
AR (1) AR055402A1 (es)
CO (1) CO5890005A1 (es)
MX (1) MXPA06009891A (es)
PE (1) PE20070577A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109538555A (zh) * 2018-12-04 2019-03-29 扬州盛达特种车有限公司 一种垃圾压缩车的节能液压系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108529097B (zh) * 2018-06-13 2019-11-01 河北极驰新能源科技有限公司 一种用于压缩式垃圾车的控制阀
CN109607001B (zh) * 2018-12-29 2021-11-30 福建龙马环卫装备股份有限公司 一种餐厨垃圾车推板卸料控制方法
CN111153088A (zh) * 2020-02-07 2020-05-15 邵延荣 一种压缩式垃圾车填装机构控制装置
CN111561487A (zh) * 2020-06-17 2020-08-21 朱金和 工程机械用顺序阀密封结构和选型
CN112429443B (zh) * 2020-11-20 2022-06-14 长沙中联重科环境产业有限公司 一种压缩式垃圾车的推铲卸料控制方法、介质、电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049256A (en) * 1960-03-23 1962-08-14 Heil Co Refuse body loading and packing mechanisms
US3410427A (en) * 1965-12-27 1968-11-12 Gar Wood Ind Inc Refuse packing system
US4522551A (en) * 1983-04-18 1985-06-11 Henneberry James W Refuse storage and discharge apparatus
US4690607A (en) * 1985-10-04 1987-09-01 The Heil Co. Refuse collection truck and apparatus for controlling compaction of refuse
US20030223849A1 (en) * 2002-02-25 2003-12-04 Hagenbuch Leroy G. Rear eject body for off-highway haulage units
US6691510B2 (en) * 2000-05-19 2004-02-17 Hitachi Construction Machinery Co., Ltd. Pipe breakage control valve device
US20040168828A1 (en) * 2003-02-10 2004-09-02 Mock Philip W. Tractor with improved valve system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312547C1 (de) * 1983-04-07 1984-11-22 Kraus & Schöllhorn Karosserie- und Fahrzeugbau Friedrich Baumgärtner GmbH, 8900 Augsburg Müllverdichtungsvorrichtung
DE3345758C2 (de) * 1983-12-17 1985-10-10 Schörling GmbH & Co Waggonbau, 3000 Hannover Müllfahrzeug
JP2664375B2 (ja) * 1987-06-16 1997-10-15 富士車輌株式会社 塵芥収集車の油圧制御装置
BR0006713A (pt) 2000-11-13 2003-09-02 Parker Hidraulica Ltda Aperfeiçoamento em circuito hidráulico para controle da força de atuação de cilindros compactadores, válvula reguladora de pressão e comando direcional hidráulico
JP4397552B2 (ja) * 2001-09-05 2010-01-13 新明和工業株式会社 塵芥収集車の塵芥押込制御装置
US6799934B1 (en) * 2003-03-14 2004-10-05 Mcneilus Truck And Manufacturing, Inc. Rear loader variable packing density system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049256A (en) * 1960-03-23 1962-08-14 Heil Co Refuse body loading and packing mechanisms
US3410427A (en) * 1965-12-27 1968-11-12 Gar Wood Ind Inc Refuse packing system
US4522551A (en) * 1983-04-18 1985-06-11 Henneberry James W Refuse storage and discharge apparatus
US4690607A (en) * 1985-10-04 1987-09-01 The Heil Co. Refuse collection truck and apparatus for controlling compaction of refuse
US6691510B2 (en) * 2000-05-19 2004-02-17 Hitachi Construction Machinery Co., Ltd. Pipe breakage control valve device
US20030223849A1 (en) * 2002-02-25 2003-12-04 Hagenbuch Leroy G. Rear eject body for off-highway haulage units
US20040168828A1 (en) * 2003-02-10 2004-09-02 Mock Philip W. Tractor with improved valve system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109538555A (zh) * 2018-12-04 2019-03-29 扬州盛达特种车有限公司 一种垃圾压缩车的节能液压系统

Also Published As

Publication number Publication date
EP1760327A3 (en) 2007-12-05
EP1760327A2 (en) 2007-03-07
PE20070577A1 (es) 2007-07-12
MXPA06009891A (es) 2007-03-21
CO5890005A1 (es) 2008-02-29
CN1923501A (zh) 2007-03-07
AR055402A1 (es) 2007-08-22

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Date Code Title Description
AS Assignment

Owner name: SAUER-DANFOSS HIDRAULICA MOBIL LTDA., BRAZIL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MACHADO-DAMASCENO, MICHEL ANGELO;SIMOES-ROCHA, LUIZ ROBERT;REEL/FRAME:018465/0840

Effective date: 20061004

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION