CN108466932A - Chassis power taking driving hydraulic speed regulation system - Google Patents

Chassis power taking driving hydraulic speed regulation system Download PDF

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Publication number
CN108466932A
CN108466932A CN201810504030.4A CN201810504030A CN108466932A CN 108466932 A CN108466932 A CN 108466932A CN 201810504030 A CN201810504030 A CN 201810504030A CN 108466932 A CN108466932 A CN 108466932A
Authority
CN
China
Prior art keywords
variable pump
automatically controlled
oil
fixed displacement
displacement motor
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.)
Granted
Application number
CN201810504030.4A
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Chinese (zh)
Other versions
CN108466932B (en
Inventor
潘峰
叶凌
马雪峰
王元为
吴淑霞
芮春伶
杨春海
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.)
TIANJIN JIEQIANG POWER EQUIPMENT CO Ltd
Original Assignee
TIANJIN JIEQIANG POWER EQUIPMENT CO Ltd
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Priority to CN201810504030.4A priority Critical patent/CN108466932B/en
Publication of CN108466932A publication Critical patent/CN108466932A/en
Application granted granted Critical
Publication of CN108466932B publication Critical patent/CN108466932B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/20—Control systems or devices for non-electric drives
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • 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
    • F15B2211/20546—Type of pump variable capacity

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

The present invention relates to power-equipment fields, more particularly to chassis power taking driving hydraulic speed regulation system, it includes the fixed displacement motor of power takeoff, automatically controlled variable pump, three-way flowrate valve and driving load that input terminal is connected with the output shaft of engine in situ, the input terminal of the automatically controlled variable pump is connected with the output end of power takeoff, the three-way flowrate valve is equipped with oil inlet, oil outlet and unloading port, the oil inlet is connect with the high-pressure mouth of automatically controlled variable pump, the oil inlet of oil outlet and fixed displacement motor connects, and unloading port connect with system oil return/hydraulic oil container.Apparatus structure provided by the invention is simple, energy saving and efficient.

Description

Chassis power taking driving hydraulic speed regulation system
Technical field
Power-equipment field of the present invention more particularly to chassis power taking driving hydraulic speed regulation system.
Background technology
From vehicle chassis power taking as power source driving hydraulic speed regulation system and general hydraulic speed regulation system it is main Difference lies in：Hydraulic speed regulation system drive a vehicle during the work time, system dynamic source, the i.e. rotating speed of engine in situ are always occurring Not expected variation influences system worked well to cause the variation of working state of system.For being needed in driving conditions The system for keeping load constant speed, at present there are mainly two types of governing systems：
One, using the governing system of variable pump+fixed displacement motor, operation principle is：The working speed of load is by quantitative horse It is determined up to rotating speed, and the rotating speed of fixed displacement motor is determined by the output flow of variable pump, the output flow of variable pump is variable pump The product of both rotating speed and its discharge capacity.If rotating speed is n when motor works normallyM, discharge capacity VM, variable revolution speed is n at this timep, row Amount is Vp, do not consider the influence of pump and motor volumetric efficiency, then have：VMnM=VPnP。
When needing to maintain load operating condition, then need to ensure VMnMFor definite value.When a certain moment engine in situ rotating speed is sent out When changing, the rotation speed change of variable pump and fixed displacement motor can be caused successively, when system detectio becomes to fixed displacement motor rotating speed It after change, can just respond, the discharge capacity V pumped by regulated variablep, so that its output flow is matched with motor flow demand, by It is larger in the variation randomness of engine speed, can not prejudge, and to the adjusting of system always engine speed variation after, There is a hysteresis quality, no matter controller response how quickly can not be eliminated when being identified caused by this process to engine speed Between it is poor.
Two, using constant displacement pump+flow valve+fixed displacement motor governing system, operation principle is：The working speed of load is by fixed Motor rotary speed is measured to determine, and the rotating speed of fixed displacement motor is determined by flow valve, the output flow of constant displacement pump any time all must not be small The flow needed for motor.Therefore the discharge capacity of constant displacement pump is chosen by minimum operating speed.
When engine speed changes, quantitative pump output flow changes correspondingly, and due to the control of flow valve, flows through quantitative horse The flow reached remains definite value, and extra flow is then by overflow valve oil return box, due to using constant displacement pump, discharge capacity non-adjustable Section, engine flow system flow under the slow-speed of revolution and high speed conditions differ greatly, and when engine speed is higher, system mainly flows Amount shunts in an overflow manner, and system overall efficiency is relatively low.
Invention content
Technical problem to be solved by the invention is to provide a kind of simple in structure, system delayed response is can compensate for, it is energy saving And efficient chassis power taking driving hydraulic speed regulation system.
The present invention is to be achieved by the following technical programs：
Chassis power taking driving hydraulic speed regulation system comprising the power taking that input terminal is connected with the output shaft of engine in situ Device, automatically controlled variable pump, three-way flowrate valve and the fixed displacement motor of driving load, the input terminal of the automatically controlled variable pump and power takeoff Output end is connected, and the three-way flowrate valve is equipped with oil inlet, oil outlet and unloading port, the oil inlet and automatically controlled variable pump High-pressure mouth connects, and the oil inlet of oil outlet and fixed displacement motor connects, and unloading port connect with system oil return/hydraulic oil container.
Beneficial effects of the present invention
Chassis power taking driving hydraulic speed regulation system, is arranged a three-way flowrate valve, by its oil inlet and automatically controlled variable pump High-pressure mouth connects, and the oil inlet of oil outlet and fixed displacement motor connects, and unloading port connect with system oil return/hydraulic oil container, structure ratio Relatively simple, when system works, for the variable pump that compares+fixed displacement motor governing system, reduction even has been eliminated controller lag The influence brought.Simultaneously as being small flow (△ Q) overflow always, the speed governing of constant displacement pump+flow valve+fixed displacement motor is compared It is more efficient for system, it is more energy efficient.
Description of the drawings
Fig. 1 is present system structural schematic diagram；
1. fixed displacement motor in figure, 2. three-way flowrate valves, 3. automatically controlled variable pumps, 4. loads, 5. power takeoffs, 6. chassis are started Machine, 7. hydraulic oil containers.
Specific implementation mode
Chassis power taking driving hydraulic speed regulation system comprising input terminal takes with what the output shaft of engine in situ 6 was connected Power device 5, automatically controlled variable pump 3, three-way flowrate valve 2 and driving load 4 fixed displacement motor 1, the input terminal of the automatically controlled variable pump with The output end of power takeoff is connected, the three-way flowrate valve be equipped with oil inlet, oil outlet and unloading port, the oil inlet with it is automatically controlled The high-pressure mouth of variable pump connects, and the oil inlet of oil outlet and fixed displacement motor connects, and unloading port connects with system oil return/hydraulic oil container 7 It connects.
When system works, the discharge capacity of automatically controlled variable pump is adjusted by controller, its output flow is made always to compare fixed displacement motor The flow of demand has more a part of (being set as △ Q), and the partial discharge is eventually by three-way flowrate valve overflow.When the rotating speed of engine When increasing suddenly, the output flow of automatically controlled variable pump becomes larger, and due to the metering function of three-way flowrate valve, fixed displacement motor rotating speed is kept Constant, extra flow overflows back hydraulic oil container by three-way flowrate valve unloading port.Excess flow can be more than △ Q at this time, then Controller can change the discharge capacity of automatically controlled variable pump to small displacement direction, its output flow and the difference of fixed displacement motor demand volume is made to become It is bordering on △ Q；When a certain moment engine speed reduces suddenly, it is assumed that controller is not acted upon, automatically controlled variable pump output flow It will necessarily reduce, two stages can be divided into the process：
First stage, automatically controlled variable pump output flow remain to meet fixed displacement motor flow demand, and fixed displacement motor rotating speed is kept Constant, only △ Q are gradually reduced, until zero；
Second stage, automatically controlled variable pump output flow have been unable to meet fixed displacement motor flow demand, fixed displacement motor rotating speed by Gradually decline.Obviously it only can just be affected to the working condition of fixed displacement motor when second stage, as long as in other words controller Process responds in the first stage, makes control and regulation to automatically controlled variable pump, the working condition of fixed displacement motor would not be by shadow It rings.,
Therefore this governing system is used, for the variable pump that compares+fixed displacement motor governing system, reduction even has been eliminated control The influence that device hysteresis band processed comes.Simultaneously as being small flow (△ Q) overflow always, compared to constant displacement pump+flow valve+quantitative horse It is more efficient for the governing system reached, it is more energy efficient.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (1)

  1. The hydraulic speed regulation system 1. chassis power taking is driven a vehicle, which is characterized in that be connected with the output shaft of engine in situ including input terminal The power takeoff that connects, automatically controlled variable pump, three-way flowrate valve and the fixed displacement motor of driving load, the input terminal of the automatically controlled variable pump with The output end of power takeoff is connected, the three-way flowrate valve be equipped with oil inlet, oil outlet and unloading port, the oil inlet with it is automatically controlled The high-pressure mouth of variable pump connects, and the oil inlet of oil outlet and fixed displacement motor connects, and unloading port connects with system oil return/hydraulic oil container It connects.
CN201810504030.4A 2018-05-23 2018-05-23 Hydraulic speed regulating system for chassis power taking and driving vehicle Active CN108466932B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810504030.4A CN108466932B (en) 2018-05-23 2018-05-23 Hydraulic speed regulating system for chassis power taking and driving vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810504030.4A CN108466932B (en) 2018-05-23 2018-05-23 Hydraulic speed regulating system for chassis power taking and driving vehicle

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CN108466932A true CN108466932A (en) 2018-08-31
CN108466932B CN108466932B (en) 2023-10-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108869450A (en) * 2018-09-12 2018-11-23 南通润邦重机有限公司 A kind of low pressure huge discharge variable pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009008111A (en) * 2007-06-26 2009-01-15 Hitachi Ltd Vehicle hydraulic system
CN202417701U (en) * 2012-02-03 2012-09-05 襄阳航力机电技术发展有限公司 Vehicle-mounted intermediate frequency hydraulic power generation system
CN103277354A (en) * 2013-06-20 2013-09-04 兰州力天同创流体控制装备有限公司 Vehicle-mounted alternating-current-generating hydraulic driving device
EP3127856A1 (en) * 2015-08-07 2017-02-08 Linde Material Handling GmbH Hydraulic energy saving control system for forklift and method for lowering the operating energy consumption for forklift trucks
CN107554290A (en) * 2017-08-28 2018-01-09 福建龙马环卫装备股份有限公司 A kind of cleaning vehicle of monomotor drive hydraulic system principle
CN208500151U (en) * 2018-05-23 2019-02-15 天津捷强动力装备股份有限公司 Chassis power taking driving hydraulic speed regulation system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009008111A (en) * 2007-06-26 2009-01-15 Hitachi Ltd Vehicle hydraulic system
CN202417701U (en) * 2012-02-03 2012-09-05 襄阳航力机电技术发展有限公司 Vehicle-mounted intermediate frequency hydraulic power generation system
CN103277354A (en) * 2013-06-20 2013-09-04 兰州力天同创流体控制装备有限公司 Vehicle-mounted alternating-current-generating hydraulic driving device
EP3127856A1 (en) * 2015-08-07 2017-02-08 Linde Material Handling GmbH Hydraulic energy saving control system for forklift and method for lowering the operating energy consumption for forklift trucks
CN107554290A (en) * 2017-08-28 2018-01-09 福建龙马环卫装备股份有限公司 A kind of cleaning vehicle of monomotor drive hydraulic system principle
CN208500151U (en) * 2018-05-23 2019-02-15 天津捷强动力装备股份有限公司 Chassis power taking driving hydraulic speed regulation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108869450A (en) * 2018-09-12 2018-11-23 南通润邦重机有限公司 A kind of low pressure huge discharge variable pump

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