CN105065374A - Automatic cooling system of hydraulic oil tank - Google Patents

Automatic cooling system of hydraulic oil tank Download PDF

Info

Publication number
CN105065374A
CN105065374A CN201510443315.8A CN201510443315A CN105065374A CN 105065374 A CN105065374 A CN 105065374A CN 201510443315 A CN201510443315 A CN 201510443315A CN 105065374 A CN105065374 A CN 105065374A
Authority
CN
China
Prior art keywords
submodule
module
temperature
digital
conversion circuit
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.)
Pending
Application number
CN201510443315.8A
Other languages
Chinese (zh)
Inventor
宋涛
于存贵
李志刚
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.)
Nanjing University of Science and Technology
Original Assignee
Nanjing University of Science and Technology
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 Nanjing University of Science and Technology filed Critical Nanjing University of Science and Technology
Priority to CN201510443315.8A priority Critical patent/CN105065374A/en
Publication of CN105065374A publication Critical patent/CN105065374A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • F15B21/042—Controlling the temperature of the fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Temperature (AREA)

Abstract

The invention provides an automatic cooling system of a hydraulic oil tank. The automatic cooling system comprises a detecting module, an analog-digital conversion circuit, a control module, a digital-analog conversion circuit and an executing module. The executing module is used for lowering the temperatures of the oil tank. The detecting module is used for obtaining the temperatures of the oil tank and ranking and grading the temperatures of the oil tank according to values. The analog-digital conversion circuit is used for converting obtained different oil tank temperature signals to corresponding digital signals. The control module is used for generating a control order according to the digital signals so as to control the working speed of the executing module. The digital-analog conversion circuit is used for converting the control order to working voltage of the executing module; each digital signal is matched with the only grade.

Description

Hydraulic oil container automatic radiating system
Technical field
The present invention relates to mechanotronics, particularly a kind of SCM Based automatic radiating system of pressing system fuel tank.
Background technique
Hydraulic Power Transmission System has the advantages that power to volume ratio is large, can realize stepless speed regulation, steadily life-span length.In present modernized society, be widely used in military products, the civilian goods various fields such as machinery, vehicle, Aeronautics and Astronautics, weapons.Along with the development of science and technology, to kinematic accuracy, many industries, particularly require that higher industry requires more and more higher to hydraulic work system.The temperature of hydraulic system fluid under high capacity, high frequency, high-power operation state can obviously increase, and oil temperature has a great impact for the working state of hydraulic system and working efficiency.For fluid, when high oil temperature, hydraulic oil viscosity reduces, and compressibility is deteriorated; For executive system, reduce the movement velocity of executive component; Meanwhile, in control procedure, reduce control accuracy and rapidity.
The radiating mode of hydraulic oil container general at present has: freely cool, medium cools, oil tank radiator cools.Freely cool is be used in hydraulic oil temperature change not quite, when also namely working load is less.It is naturally cooled by the fluid of oil hydraulic circuit by fuel tank; The narrow limitation that this method uses is comparatively large, can not be satisfied with in most of hydraulic system.The general mode adopting water-cooled of medium cooling, faster effectively can control the temperature of fluid.But general volume is comparatively large, and also need to be equipped with water tank, for being applied in the mechanical structure that compares and simplify, applicability is less.Oil tank radiator cooling means, is arranged on (or fuel tank carries) on fuel tank by the mechanical device of a set of comparatively compact complexity, by power supply continued power, cools with fan etc.This mode cost is higher, and controllability is not strong, is in radiating state energy utilization rate upon actuation all the time lower.Therefore, its usage economy is good, applicability is extensive, small volume structure is simple, controllability is strong and the scheme of the saving energy becomes research emphasis.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic oil container automatic radiating system, this system designs based on single-chip microcomputer, can automatically detect mailbox temperature, and according to the operating rate of mailbox temperature automatic adjustment cooling device.
A kind of hydraulic oil container automatic radiating system, comprises testing module, analog-to-digital conversion circuit, control module, digital-to-analogue conversion circuit, Executive Module.Described Executive Module is for reducing fuel tank temperature; Described testing module is for obtaining fuel tank temperature and fuel tank temperature being sorted by size and divided rank; Described analog-to-digital conversion circuit is used for the different fuel tank temperature signals obtained to be converted to corresponding digital signal; Described control module is used for producing according to digital signal the operating rate that control command controls Executive Module; Described digital-to-analogue conversion circuit is used for operating voltage control command being converted to Executive Module; Each digital signal described is mated with unique level.
Adopt above-mentioned hydraulic oil container automatic radiating system, described testing module comprises temperature and obtains submodule, list submodule, first and judge submodule, output sub-module.Described temperature obtains submodule for obtaining fuel tank temperature; Described list submodule is for storing temperature range representated by each grade and voltage corresponding to grade; Described first judges that submodule is for determining that the fuel tank temperature obtained falls into the grade corresponding to temperature range; According to first, described output sub-module judges that the result transmission voltage value of submodule is to analog-to-digital conversion circuit.
Adopt above-mentioned hydraulic oil container automatic radiating system, described control module comprises digital signal acquisition submodule, threshold value submodule, second judges submodule, process submodule, send submodule.Described digital signal obtains the digital signal that submodule sends for receiving analog-to-digital conversion circuit; Described threshold value submodule is for storing mailbox dangerous temperature information; Described process submodule drives according to the mailbox temperature information obtained and sends submodule sending controling instruction, and each control command described is mated with unique level; If described second judges that submodule is for judging that obtained mailbox temperature is higher than mailbox dangerous temperature, control treatment submodule drives and sends submodule transmission with top grade to the control command of mating.
The present invention compared with prior art, have the following advantages: consider that hydraulic work system is under different operating mode, the temperature variation of its fluid has bigger difference, and traditional heat-dissipating mode continues heat radiation, add unnecessary energy consumption, the design's system can respond startup radiating motor fan and temperature be controlled in the reasonable scope by detected temperatures and in time, effectively can reduce energy consumption; Present system forms simple, and number of members is less, with low cost, is easy to integrated, fuel tank takes up room little; For hygrothermal environment in fuel tank, selected fluid temperature sensor can meet rugged environment and normally work, and meanwhile, other components and parts are not high to environmental requirement, can meet most of hydraulic oil container, has very large applicability.
Below in conjunction with Figure of description, the present invention is described further.
Accompanying drawing explanation
Fig. 1 is present system structure principle chart.
Fig. 2 is testing module system architecture schematic diagram of the present invention.
Fig. 3 is control module system architecture schematic diagram of the present invention.
Fig. 4 is TLC5615 chip circuit figure.
Fig. 5 is AD0804 chip circuit figure.
Fig. 6 is systemic software development program flow diagram.
Fig. 7 is PID control principle drawing.
Embodiment
Composition graphs 1, a kind of hydraulic oil container automatic radiating system, comprises testing module, analog-to-digital conversion circuit, control module, digital-to-analogue conversion circuit, Executive Module.Described Executive Module is for reducing fuel tank temperature; Described testing module is for obtaining fuel tank temperature and fuel tank temperature being sorted by size and divided rank; Described analog-to-digital conversion circuit is used for the different fuel tank temperature signals obtained to be converted to corresponding digital signal; Described control module is used for producing according to digital signal the operating rate that control command controls Executive Module; Described digital-to-analogue conversion circuit is used for operating voltage control command being converted to Executive Module; Each digital signal described is mated with unique level.
Composition graphs 2, described testing module comprises temperature acquisition submodule, list submodule, first judges submodule, output sub-module.Described temperature obtains submodule for obtaining fuel tank temperature; Described list submodule is for storing temperature range representated by each grade and voltage corresponding to grade; Described first judges that submodule is for determining that the fuel tank temperature obtained falls into the grade corresponding to temperature range; According to first, described output sub-module judges that the result transmission voltage value of submodule is to analog-to-digital conversion circuit.
Composition graphs 3, described control module comprises digital signal acquisition submodule, threshold value submodule, second judges submodule, process submodule, transmission submodule.Described digital signal obtains the digital signal that submodule sends for receiving analog-to-digital conversion circuit; Described threshold value submodule is for storing mailbox dangerous temperature information; Described process submodule drives according to the mailbox temperature information obtained and sends submodule sending controling instruction, and each control command described is mated with unique level; If described second judges that submodule is for judging that obtained mailbox temperature is higher than mailbox dangerous temperature, control treatment submodule drives and sends submodule transmission with top grade to the control command of mating.
Control command is converted into magnitude of voltage by described digital-to-analogue conversion circuit, and each magnitude of voltage described mates with unique control command.
Comparison sub-module and motor is comprised in described Executive Module; Described comparison sub-module produces the drive singal of drive motor work according to magnitude of voltage, and each drive singal mates with unique voltage value, and each motor speed mates with unique drive signal.
System hardware comprises single-chip microcomputer, fluid temperature sensor, A/D, D/A chip and some drive circuits and appliance component.The present invention adopts following concrete system hardware to realize goal of the invention.
(1) single-chip microcomputer is chosen
In system operation, single-chip microcomputer is that whole " brain " plays vital effect as control module.Native system selects STC89C52 single-chip microcomputer.It has 4KB sheet internal program storage ROM; Data storage in the sheet of 128 bytes; 4 I/O interfaces---P0 ~ P3; External 11.0592MHz crystal oscillator.
(2) testing module design
" eyes " of sensor perceptually external information are links important in native system.General Temperature Transducer in Common Use DS18B20, volume is little, antijamming capability is strong feature that it has.Consider and want detecting liquid temperature, and oil tank liquid environment is comparatively severe, need it to have waterproof, corrosion-resistant etc. feature, be different from general temperature transducer, select fluid temperature sensor.Native system selects JCJ100TW plain type temperature transducer, adopts the encapsulation of stainless steel metal shell, and inner insulating heat-conduction material of filling is sealed to form, maximum temperature-measuring range-55 DEG C ~+125 DEG C, precision ± 0.5 DEG C (-10 DEG C ~+85 DEG C).Have volume little, be quick on the draw, the feature such as abundant species, waterproof antidetonation.
(3) D/A, A/D modular converter design
D/A chip chooses TLC5615, be a serial 10 is DAC chip.As long as just can be completed the serial transmission of 10 bit data by 3 universal serial bus.Fig. 4 is shown in by its design circuit.Its DIN, SLK, CS pin connects P2^7, P2^6, P2^5 mouth respectively.
A/D chip chooses AD0804, is continuous gradual A/D converter, has that transfer speed is fast, resolution is high, low-cost feature.Itself and single-chip microcomputer P1 mouth parallel join, be used for that the temperature analog signal detected by fluid temperature sensor is converted to digital data transmission and process to single-chip microcomputer.Its circuit diagram as shown in Figure 5.
(4) single-chip microcomputer temperature control system software development
Whole system controls to be realized by C language, and flow chart is shown in Fig. 6.Be programmed to two kinds of functional modes: automatic mode and manual mode, whether press down judgement by detecting pattern switching key, when depressed, input single-chip microcomputer low level, is manual mode, otherwise is automatic mode.Under manual mode, three buttons are used for sending acceleration to motor, slow down, starting and halt instruction respectively; Under automatic mode, by arranging timer, sampling should be carried out for the every 50ms of Time Pick-off Units, namely detects oil liquid temperature every 50ms.Sensor oneself work controls motor radiating by threshold values.This design not only can prevent automatic mode Failure prevention fault, independently can also carry out manually-operable, and can carry out the conversion of two kinds of patterns in real time.
(5) digital IIR filters
Native system adopts digital IIR filters, sees Fig. 7, because PID control method is more simple and practical, is widely used in industrial control, has good control effects, itself is also easy to realize.
PID controller is a kind of linear controller, according to the error e (t) of setting value r (t) with real output value y (t), carries out proportional integral derivative linear combination, acts on control object.
u ( t ) = K P e ( t ) + K I ∫ 0 t e ( t ) d t + K D d e ( t ) d t - - - ( 1 )
In formula: K p, K i, K dbe respectively ratio, integration, differential coefficient.
In pid algorithm, because deviation e runs through whole integral process, computer carries out the very large Accumulated deviation of cumulative generation to e (t), the effect that impact controls, the controlling method adopting digital PID in engineering more.It is a kind of increment type, and its output is the increment Delta u (t) of controller.
By above formula sliding-model control, and get t=k, t=k-1:
u ( k ) = K P e ( k ) + K I Σ 0 k e ( j ) T + K D e ( k ) - e ( k - 1 ) T - - - ( 2 )
Upper two formulas are subtracted each other
Δ u ( k ) = K P Δ e ( k ) + K I e ( k ) + K D Δ e ( k ) - Δ e ( k - 1 ) T - - - ( 3 )
Regulate K p, K i, K dthe value of three coefficients considers system and enters the factors such as the stability of stable time length, the size of system overshoot, the height of stable state accuracy and transient process, debugs out optimal system.
By above formula modification:
Δ u ( k ) = ( K P + K I + K D T ) e ( k ) - ( K P + K I T ) e ( k - 1 ) + K D T e ( k - 2 ) - - - ( 4 )
I.e. Δ u (k)=Ae (k)+Be (k-1)+Ce (k-2), as long as the value of reasonable adjusting A, B, C tri-parameters obtains three error amounts.
By above modular system, during institution staff, oil liquid temperature rises, oil liquid temperature passes through temperature transducer, change through A/D, transfer analogue signal to digital signal and send to single-chip microcomputer, single-chip microcomputer carries out Real-Time Monitoring to oil liquid temperature and is presented on liquid crystal screen by current temperature value, observes for operator.When temperature reaches a certain threshold values, note Current Temperatures is dangerous temperature, and single-chip microcomputer output digit signals converts analogue signal to through D/A and sends to the heat radiation of actuating motor oil dropping apparatus, and when temperature is lower than threshold values, single-chip microcomputer exports 0V, and motor does not rotate.Because fuel tank temperature changes in the above certain limit of threshold values, the part exceeding threshold values is divided into different gear, single-chip microcomputer also exports the magnitude of voltage of the corresponding gear of 0 ~ 5V, the voltage that the higher output of gear is higher, thus according to the speed that Current Temperatures controls to dispel the heat by controlling motor speed.
The normal working temperature of hydraulic oil is 30 ~ 60 DEG C, does not exceed 70 DEG C.Threshold values is decided to be 40 DEG C, altogether sets 5 grades by 40 ~ 70 DEG C, as shown in table 1.Consider that temperature is higher larger to systematic influence, and consider that heat radiation is not realize in time, need reserved certain surplus, therefore, setting is abnormal operating temperature more than 55 DEG C, and is set as that maximum voltage exports by more than 55 DEG C, to ensure that system works is in normal temperature range.
The corresponding gear of table 140 ~ 70 DEG C correspondence

Claims (5)

1. a hydraulic oil container automatic radiating system, is characterized in that, comprises testing module, analog-to-digital conversion circuit, control module, digital-to-analogue conversion circuit, Executive Module;
Described Executive Module is for reducing fuel tank temperature;
Described testing module is for obtaining fuel tank temperature and fuel tank temperature being sorted by size and divided rank;
Described analog-to-digital conversion circuit is used for the different fuel tank temperature signals obtained to be converted to corresponding digital signal;
Described control module is used for producing according to digital signal the operating rate that control command controls Executive Module;
Described digital-to-analogue conversion circuit is used for operating voltage control command being converted to Executive Module;
Each digital signal described is mated with unique level.
2. hydraulic oil container automatic radiating system according to claim 1, is characterized in that, described testing module comprises temperature acquisition submodule, list submodule, first judges submodule, output sub-module;
Described temperature obtains submodule for obtaining fuel tank temperature;
Described list submodule is for storing temperature range representated by each grade and voltage corresponding to grade;
Described first judges that submodule is for determining that the fuel tank temperature obtained falls into the grade corresponding to temperature range;
According to first, described output sub-module judges that the result transmission voltage value of submodule is to analog-to-digital conversion circuit.
3. hydraulic oil container automatic radiating system according to claim 1, is characterized in that, described control module comprises digital signal acquisition submodule, threshold value submodule, second judges submodule, process submodule, transmission submodule;
Described digital signal obtains the digital signal that submodule sends for receiving analog-to-digital conversion circuit;
Described threshold value submodule is for storing mailbox dangerous temperature information;
Described process submodule drives according to the mailbox temperature information obtained and sends submodule sending controling instruction, and each control command described is mated with unique level;
If described second judges that submodule is for judging that obtained mailbox temperature is higher than mailbox dangerous temperature, control treatment submodule drives and sends submodule transmission with top grade to the control command of mating.
4. hydraulic oil container automatic radiating system according to claim 1, is characterized in that, control command is converted into magnitude of voltage by described digital-to-analogue conversion circuit, and each magnitude of voltage described mates with unique control command.
5. hydraulic oil container automatic radiating system according to claim 4, is characterized in that, comprises comparison sub-module and motor in described Executive Module; Described comparison sub-module produces the drive singal of drive motor work according to magnitude of voltage, and each drive singal mates with unique voltage value, and each motor speed mates with unique drive signal.
CN201510443315.8A 2015-07-24 2015-07-24 Automatic cooling system of hydraulic oil tank Pending CN105065374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510443315.8A CN105065374A (en) 2015-07-24 2015-07-24 Automatic cooling system of hydraulic oil tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510443315.8A CN105065374A (en) 2015-07-24 2015-07-24 Automatic cooling system of hydraulic oil tank

Publications (1)

Publication Number Publication Date
CN105065374A true CN105065374A (en) 2015-11-18

Family

ID=54494845

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510443315.8A Pending CN105065374A (en) 2015-07-24 2015-07-24 Automatic cooling system of hydraulic oil tank

Country Status (1)

Country Link
CN (1) CN105065374A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1854539A (en) * 2005-04-20 2006-11-01 沃尔沃建造设备控股（瑞典）有限公司 Apparatus and method for controlling a pump flow of heavy construction equipment
CN201554720U (en) * 2009-10-23 2010-08-18 江苏省交通科学研究院股份有限公司 Hydraulic oil temperature control system of falling weight deflectometer
CN101994729A (en) * 2010-12-22 2011-03-30 西安交通大学苏州研究院 Oil temperature control system and control method of refrigeration type hydraulic system
CN103527566A (en) * 2013-10-16 2014-01-22 上海中联重科桩工机械有限公司 Engineering machine heat radiating control device, system and method and engineering machine
CN103713630A (en) * 2013-12-31 2014-04-09 湖北航天技术研究院特种车辆技术中心 Fatigue life simulation test system for automatic transmission electronic control system
CN203570758U (en) * 2013-10-14 2014-04-30 飞翼股份有限公司 Automatic control device for hydraulic oil tank
CN204175714U (en) * 2014-09-26 2015-02-25 宁波旭升机械有限公司 A kind of oil-temperature control device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1854539A (en) * 2005-04-20 2006-11-01 沃尔沃建造设备控股（瑞典）有限公司 Apparatus and method for controlling a pump flow of heavy construction equipment
CN201554720U (en) * 2009-10-23 2010-08-18 江苏省交通科学研究院股份有限公司 Hydraulic oil temperature control system of falling weight deflectometer
CN101994729A (en) * 2010-12-22 2011-03-30 西安交通大学苏州研究院 Oil temperature control system and control method of refrigeration type hydraulic system
CN203570758U (en) * 2013-10-14 2014-04-30 飞翼股份有限公司 Automatic control device for hydraulic oil tank
CN103527566A (en) * 2013-10-16 2014-01-22 上海中联重科桩工机械有限公司 Engineering machine heat radiating control device, system and method and engineering machine
CN103713630A (en) * 2013-12-31 2014-04-09 湖北航天技术研究院特种车辆技术中心 Fatigue life simulation test system for automatic transmission electronic control system
CN204175714U (en) * 2014-09-26 2015-02-25 宁波旭升机械有限公司 A kind of oil-temperature control device

Similar Documents

Publication Publication Date Title
King et al. The application of fuzzy control systems to industrial processes
CN204787473U (en) Drive of two -stage high frequency canalis haemalis refrigerator direct current and initiative temperature control system
CN101162396B (en) Temperature control method and temperature control system
Huang et al. Improving the energy efficiency of a hydraulic press via variable-speed variable-displacement pump unit
CN108306505A (en) A kind of compound adaptive model forecast Control Algorithm of Boost
CN104090491A (en) Gas steam combined cycle unit multivariable constrained prediction function load control method
Yang et al. Hybrid intelligent control of gas collectors of coke ovens
CN108646558A (en) A kind of Energy-saving for Thermal Power Units type sliding pressure real-time optimization method and system
CN104154767A (en) Temperature measurement and control system for plate-type SCR denitration catalyst calcining furnace
Lin et al. Irreversible chemical-engines and their optimal performance analysis
CN101767424B (en) Injection molding machine and injection molding method
CN105065374A (en) Automatic cooling system of hydraulic oil tank
CN202746166U (en) Converter smoke helmet cooling water circulating energy conservation management and control system in steel making plant
CN205843350U (en) A kind of net belt type sintering furnace
CN206975459U (en) Two-component metal phase diagram experimental provision based on Single chip microcomputer temperature control system
CN102255516A (en) High-voltage converter and fan and water pump application system thereof
CN115981156A (en) Aeroengine active limit protection control method under time-varying output constraint
Zhou et al. Intelligent dynamic modeling for online estimation of burning zone temperature in cement rotary kiln
CN104570912A (en) Full-automatic smelting control system and control method for polycrystalline silicon
CN201476529U (en) Cascade temperature control device for controlling temperature inside and outside muffle tank of large pit furnace
Tian et al. Application of plc in variable frequency constant pressure control system for mine emulsion pump station
Wang et al. Design and Application of a Non-wrapped Programmable Logic Controller (PLC) Laboratory Kit for Automatic Control Education
CN102073275A (en) Control device and control method for adaptive fuzzy dynamic surface of continuous stirred tank reactor
CN103986383A (en) Power plant high-voltage side reactive-voltage comprehensive control method and system
Li et al. Design of Gluing Process Control System Based on DCS System

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20151118