CN106870509A - A kind of movable hydraulic Oil-source control system based on PLC - Google Patents
A kind of movable hydraulic Oil-source control system based on PLC Download PDFInfo
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- CN106870509A CN106870509A CN201510913143.6A CN201510913143A CN106870509A CN 106870509 A CN106870509 A CN 106870509A CN 201510913143 A CN201510913143 A CN 201510913143A CN 106870509 A CN106870509 A CN 106870509A
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Abstract
A kind of movable hydraulic Oil-source control system based on PLC, is made up of working connection oil return line, low discharge road, Zhong Ya roads, high pressure road, low pressure road and cooling system and fuel tank, comprising main oil pump 1,3 three pumps of grease pump 2 and scavenge oil pump.The control system uses S7-300PLC control technologies, constructed for 10MPa hydraulic oil source oil supply systems and control field apparatus, PC as the electric control system of host computer on-line monitoring as slave computer by PLC, the combination of mechanical, electrical, liquid, computer technology is realized, the control requirement of system is met.
Description
Technical field
The present invention relates to a kind of movable hydraulic Oil-source control system based on PLC.
Background technology
10MPa
Movable hydraulic oil sources can separately or concurrently provide 4 road forced feeds as the oil supply system of certain wheeled vehicle power unit testing stand, and maximum pressure is 10MPa, and maximum stream flow is 200L/min, and system outlet oil temperature is up to 120 DEG C.Because system architecture is complicated, controlled with HTHP big flow control loop and other subsystems, therefore it is particularly significant to build safe and stable electric control system.
The content of the invention
The present invention proposes a kind of movable hydraulic Oil-source control system based on PLC, using S7-300PLC control technologies, constructed for 10MPa hydraulic oil source oil supply systems and control field apparatus, PC as the electric control system of host computer on-line monitoring as slave computer by PLC, the combination of mechanical, electrical, liquid, computer technology is realized, the control requirement of system is met.
The technical solution adopted in the present invention is：The hydraulic system is made up of working connection oil return line, low discharge road, Zhong Ya roads, high pressure road, low pressure road and cooling system and fuel tank, comprising main oil pump 1,3 three pumps of grease pump 2 and scavenge oil pump.Wherein working connection ＆ oil return lines passing ratio overflow valve 4 is adjusted, low discharge road is adjusted by pressure-reducing valve 5, flow speed control valve 6 and controls its pressure flow, middle pressure route electrical ball valve 7, the regulation control of proportional pressure-reducing valve 8, high pressure route motorized adjustment ball valve 9, low pressure route electrical ball valve 10 and motorized adjustment ball valve 11 realize the control of its pressure and flow respectively.Fuel tank realizes that its temperature is raised by heater 12, and cooling system controls cooling water flow to change heat exchange efficiency by controlling the aperture of cooling water valve 13.
The hydraulic oil source oil supply system realizes the control to the conditioning of measured signal, data acquisition, driver element and hydraulic system element with PLC as core.Control system is including PLC control system, revolution speed control system, overrun alarm system, hydraulic loading system, Oil-temperature control system, pressure and Flow Measuring System etc..
From quantitative axial plunger pump, main oil pump motor controls frequency converter to realize variable speed to the main oil pump of the control system by PLC, so as to change the flow of fluid in working connection.Start frequency converter and blower fan in the man-machine interface of configuration, the setting speed of mainshaft, the speed of mainshaft for setting is changed in PLC program, it is converted into the status word output of frequency converter, so as to adjust frequency converter output frequency, Oil pump electrical machinery is driven, the control to fluid flow is realized, this just constitutes the open cycle system of rotating speed control.
The HYDRAULIC CONTROL SYSTEM function is divided into live touch-screen control and long-range PC controls, and logic function is realized being completed by PLC programmable logic controller (PLC)s, therefore software is related to the programming of slave computer PLC, host computer HMI machine Interaction Interface Designs.57-300PLC carries out hardware configuration and software programming using STEP7 softwares, and the program that will finally finish is downloaded to PLC by PC/PPI cables.System is using Profibus buses connection PLC, the flowmeter of front end, pressure transmitter and temperature sensor, now PLC is used as 1 class main website, it is responsible for receiving pressure, flow and temperature information, and this analog quantity is converted into digital quantity, it is compared with host computer setting value, operation result is converted into electric signal, the input end of the product brake tube intelligent object at the signal feeding end, magnetic valve or control heater of output to frequency converter using PID control unit.
The STEP7 programmings employ modular programming idea, i.e., program is divided into several program blocks, and each program block contains the logical order of some equipment and task, subprogram of these blocks equivalent to main circulating program.Modularization programming reduction program complexity, makes the simple operations such as programming, debugging and maintenance.In Software for Design, the control of fuel tank oil temperature is due to the characteristics of it has big inertia, purely retarded and parameter time varying, it is difficult to reach preferable control effect using traditional PID control, oil liquid temperature control is carried out using Self-Tuning Fuzzy-PID Controller control algolithm through studying, good control effect is achieved.Because fuzzy reasoning amount of calculation is than larger, calculated improper online on PLC, therefore fuzzy inference rule is configured to by fuzzy reasoning table by off-line calculation, quick fuzzy reasoning is realized by way of tabling look-up in actual control process.
The beneficial effects of the invention are as follows：The system uses S7-300PLC control technologies, constructed for 10MPa hydraulic oil source oil supply systems and control field apparatus, PC as the electric control system of host computer on-line monitoring as slave computer by PLC, the combination of mechanical, electrical, liquid, computer technology is realized, the control requirement of system is met.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is 10MPa movable hydraulics oil sources oil supply system figure of the invention.
Fig. 2 is control system overall plan of the invention.
Fig. 3 is Hydraulic system inspecting of the invention and Control System Software design drawing.
Fig. 4 is PLC controls main program flow chart of the invention.
In figure：1. main oil pump；2. grease pump；3. scavenge oil pump；4. proportional pressure control valve；5. pressure-reducing valve；6. flow speed control valve；7th, 10. electrical ball valve；8. proportional pressure-reducing valve；9th, 11. motorized adjustment ball valve；12. heaters；13. cooling water valves；14. plate type heat exchangers one；15. plate type heat exchangers two.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Such as Fig. 1, hydraulic system is made up of working connection oil return line, low discharge road, Zhong Ya roads, high pressure road, low pressure road and cooling system and fuel tank, comprising main oil pump 1,3 three pumps of grease pump 2 and scavenge oil pump.Wherein working connection ＆ oil return lines passing ratio overflow valve 4 is adjusted, low discharge road is adjusted by pressure-reducing valve 5, flow speed control valve 6 and controls its pressure flow, middle pressure route electrical ball valve 7, the regulation control of proportional pressure-reducing valve 8, high pressure route motorized adjustment ball valve 9, low pressure route electrical ball valve 10 and motorized adjustment ball valve 11 realize the control of its pressure and flow respectively.Fuel tank realizes that its temperature is raised by heater 12, and cooling system controls cooling water flow to change heat exchange efficiency by controlling the aperture of cooling water valve 13.
Such as Fig. 2, hydraulic oil source oil supply system realizes the control of conditioning to measured signal, data acquisition, driver element and hydraulic system element with PLC as core.Control system is including PL control systems, revolution speed control system, overrun alarm system, hydraulic loading system, Oil-temperature control system, pressure and Flow Measuring System etc..
From quantitative axial plunger pump, main oil pump motor controls frequency converter to realize variable speed to the main oil pump of control system by PLC, so as to change the flow of fluid in working connection.Start frequency converter and blower fan in the man-machine interface of configuration, the setting speed of mainshaft, the speed of mainshaft for setting is changed in PLC program, it is converted into the status word output of frequency converter, so as to adjust frequency converter output frequency, Oil pump electrical machinery is driven, the control to fluid flow is realized, this just constitutes the open cycle system of rotating speed control.
As Fig. 3, Fig. 4, HYDRAULIC CONTROL SYSTEM function are divided into live touch-screen control and long-range PC controls, logic function is realized being completed by PLC programmable logic controller (PLC)s, therefore software is related to the programming of slave computer PLC, host computer HMI machine Interaction Interface Designs.57-300PLC carries out hardware configuration and software programming using STEP7 softwares, and the program that will finally finish is downloaded to PLC by PC/PPI cables.System is using Profibus buses connection PLC, the flowmeter of front end, pressure transmitter and temperature sensor, now PLC is used as 1 class main website, it is responsible for receiving pressure, flow and temperature information, and this analog quantity is converted into digital quantity, it is compared with host computer setting value, operation result is converted into electric signal, the input end of the product brake tube intelligent object at the signal feeding end, magnetic valve or control heater of output to frequency converter using PID control unit.
STEP7 programmings employ modular programming idea, i.e., program is divided into several program blocks, and each program block contains the logical order of some equipment and task, subprogram of these blocks equivalent to main circulating program.Modularization programming reduction program complexity, makes the simple operations such as programming, debugging and maintenance.In Software for Design, the control of fuel tank oil temperature is due to the characteristics of it has big inertia, purely retarded and parameter time varying, it is difficult to reach preferable control effect using traditional PID control, oil liquid temperature control is carried out using Self-Tuning Fuzzy-PID Controller control algolithm through studying, good control effect is achieved.Because fuzzy reasoning amount of calculation is than larger, calculated improper online on PLC, therefore fuzzy inference rule is configured to by fuzzy reasoning table by off-line calculation, quick fuzzy reasoning is realized by way of tabling look-up in actual control process.
Claims (6)
1. a kind of movable hydraulic Oil-source control system based on PLC, it is characterized in that：The hydraulic system is made up of working connection oil return line, low discharge road, Zhong Ya roads, high pressure road, low pressure road and cooling system and fuel tank, comprising main oil pump 1,3 three pumps of grease pump 2 and scavenge oil pump.
2. a kind of movable hydraulic Oil-source control system based on PLC according to claim 1, it is characterized in that：The working connection ＆ oil return line passing ratios overflow valve 4 is adjusted, low discharge road is adjusted by pressure-reducing valve 5, flow speed control valve 6 and controls its pressure flow, middle pressure route electrical ball valve 7, the regulation control of proportional pressure-reducing valve 8, high pressure route motorized adjustment ball valve 9, low pressure route electrical ball valve 10 and motorized adjustment ball valve 11 realize the control of its pressure and flow respectively.
3. a kind of movable hydraulic Oil-source control system based on PLC according to claim 1, it is characterized in that：The fuel tank realizes that its temperature is raised by heater 12, and cooling system controls cooling water flow to change heat exchange efficiency by controlling the aperture of cooling water valve 13.
4. a kind of movable hydraulic Oil-source control system based on PLC according to claim 1, it is characterized in that：The hydraulic oil source oil supply system realizes the control to the conditioning of measured signal, data acquisition, driver element and hydraulic system element with PLC as core.
5. a kind of movable hydraulic Oil-source control system based on PLC according to claim 1, it is characterized in that：The control system is including PLC control system, revolution speed control system, overrun alarm system, hydraulic loading system, Oil-temperature control system, pressure and Flow Measuring System etc..
6. a kind of movable hydraulic Oil-source control system based on PLC according to claim 1, it is characterized in that：From quantitative axial plunger pump, main oil pump motor controls frequency converter to realize variable speed to the main oil pump of the control system by PLC, so as to change the flow of fluid in working connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510913143.6A CN106870509A (en) | 2015-12-11 | 2015-12-11 | A kind of movable hydraulic Oil-source control system based on PLC |
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| CN201510913143.6A CN106870509A (en) | 2015-12-11 | 2015-12-11 | A kind of movable hydraulic Oil-source control system based on PLC |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302096A (en) * | 2018-02-01 | 2018-07-20 | 广州光谷机电科技有限公司 | A kind of hydraulic pressure control device and method |
| CN109296597A (en) * | 2018-11-06 | 2019-02-01 | 广州晶品智能压塑科技股份有限公司 | Hydraulic station pressure regulating system |
| CN109343447A (en) * | 2018-09-12 | 2019-02-15 | 四川川润液压润滑设备有限公司 | Control system and method for endless-track vehicle gear power shifting testing stand |
| CN109358563A (en) * | 2018-09-07 | 2019-02-19 | 四川川润液压润滑设备有限公司 | A kind of online real time data detection height pressure control system of double screen and method |
| CN112943518A (en) * | 2021-02-09 | 2021-06-11 | 中国长江电力股份有限公司 | Hydraulic oil temperature control system and method for hydraulic turbine governor |
| CN113090615A (en) * | 2021-04-07 | 2021-07-09 | 哈尔滨理工大学 | Hydraulic oil source electronic control unit |
-
2015
- 2015-12-11 CN CN201510913143.6A patent/CN106870509A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302096A (en) * | 2018-02-01 | 2018-07-20 | 广州光谷机电科技有限公司 | A kind of hydraulic pressure control device and method |
| CN109358563A (en) * | 2018-09-07 | 2019-02-19 | 四川川润液压润滑设备有限公司 | A kind of online real time data detection height pressure control system of double screen and method |
| CN109343447A (en) * | 2018-09-12 | 2019-02-15 | 四川川润液压润滑设备有限公司 | Control system and method for endless-track vehicle gear power shifting testing stand |
| CN109296597A (en) * | 2018-11-06 | 2019-02-01 | 广州晶品智能压塑科技股份有限公司 | Hydraulic station pressure regulating system |
| CN112943518A (en) * | 2021-02-09 | 2021-06-11 | 中国长江电力股份有限公司 | Hydraulic oil temperature control system and method for hydraulic turbine governor |
| CN113090615A (en) * | 2021-04-07 | 2021-07-09 | 哈尔滨理工大学 | Hydraulic oil source electronic control unit |
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