CN106438531B - A kind of double oil pump hydraulic control systems and control method of fatigue tester - Google Patents
A kind of double oil pump hydraulic control systems and control method of fatigue tester Download PDFInfo
- Publication number
- CN106438531B CN106438531B CN201610935325.8A CN201610935325A CN106438531B CN 106438531 B CN106438531 B CN 106438531B CN 201610935325 A CN201610935325 A CN 201610935325A CN 106438531 B CN106438531 B CN 106438531B
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- Prior art keywords
- oil pump
- servo motor
- oil
- servo
- driver
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Classifications
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- 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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
Abstract
A kind of double oil pump hydraulic control systems of fatigue tester, including oil cylinder, piston, the first fuel tank, the first oil pump, first servo motor, first servo motor driver, the second fuel tank, the second oil pump, the second servo motor, the second motor servo driver and data acquisition control system；The oil inlet of first oil pump is connect with the first fuel tank, and oil outlet is connect with oil cylinder, and first servo motor is connect with the first oil pump, and first servo motor is connect with first servo motor driver；The oil inlet of second oil pump is connect with oil cylinder, oil outlet is connect with the second fuel tank, second servo motor is connect with the second oil pump, and the second servo motor is connect with the second motor servo driver, and first servo motor driver and the second motor servo driver are connected to data acquisition control system.The present invention substantially reduces fatigue machine and adds the time required for unloading, greatly improve fatigue tester adds unloaded frequency compared with a previous oil pump is as power source.
Description
【Technical field】
The present invention relates to the double oil pump hydraulic control systems and control method of a kind of fatigue tester.
【Background technology】
Fatigue tester is that one kind is mainly used under room temperature state, measures fatigue behaviour, the fatigue of metal and its component
Service life completes the machine of the fatigue tests such as precrack and crack propagation.
Fatigue tester is generally used hydraulic power supply, and previous fatigue tester is mainly driven using common electric machine general
Logical constant displacement pump adjusts the output of power plant toward oil transportation in working cylinder by regulating valve (flow valve) or overflow valve (pressure valve)
Pressure and movement speed, advantage be safeguard it is simple, the disadvantage is that oil pump always big flow it is fuel-displaced to cause hydraulic oil temperature to rise excessively high, from
And cause hydraulic system that cooling equipment ability continuous operation, energy consumption must be used very big.
Operation principle is：Common electric machine driving oil pump is run with rated speed, when executing agency needs in certain pressure
Under when being run by certain speed pressure sensor send a signal to computer, send pressure controling signal by computer overflows to ratio
Valve is flowed, proportional pressure control valve adjusts system working pressure, and displacement sensor sends a signal to computer, sent a signal to by computer
Proportional flow control valve, the pressure that proportional flow control valve provides oil pump are allocated, and a part of pressure oil is supplied to executing agency, is allowed to
The displacement of executing agency, the needs of speed can just be met, extra pressure oil flows back to fuel tank, this system through proportional pressure control valve
Flow and pressure need to adjust by proportional flow control valve and proportional pressure control valve.
The electrical consumption power of above-mentioned hydraulic power system is：
P=p × Q
Q=n × q
P=p × n × q
P in formula --- power (w)
P --- system pressure (Pa)
Q --- flow (m3/s)
N --- motor speed (r/s)
Q --- oil pump capacity (m3/r)
Since motor is run with rated speed in the system, n × q is constant, so electrical consumption power and system pressure
Power is related, when system pressure determines, no matter executing agency's speed of service speed does not change power consumption, that is, in executing agency
When needing low speed operation or pressurize, the work(of electrical consumption is largely lost work, these lost works are largely converted into thermal energy simultaneously
Fuel tank is flowed back to through proportional pressure control valve by pressure oil, leads to system heat generation, in many situations, especially as fatigue tester
This high pressure and the prodigious operating mode of velocity variations, need to install cooling system, low so as to cause capacity usage ratio when operation, Er Qiezeng
Cost is added.
The prior art is often an oil pump as power source, and single operation of oil pump figure is as shown in Figure 1, oil pump rotates forward when load
Needed to oil cylinder oil inlet, when unloading by rotate forward stop after just invert, oil cylinder oil return, complete primary plus unloading need it is more long
Time.
【Invention content】
Technical problem to be solved by the present invention lies in provide a kind of double oil pump hydraulic control systems of fatigue tester with
Control method, system structure is simple, and control method adds unloading frequency high, greatly improves work efficiency, while greatling save energy
Source.
The invention is realized in this way：
A kind of double oil pump hydraulic control systems of fatigue tester, including an oil cylinder, a piston, one first fuel tank, one
One oil pump, a first servo motor, a first servo motor driver, one second fuel tank, one second oil pump, one second servo electricity
Machine, one second motor servo driver and data acquisition control system；
The oil inlet of first oil pump is connect with first fuel tank, and oil outlet is connect with the oil cylinder, and described first
Servo motor is connect with first oil pump, and the first servo motor is connect with the first servo motor driver；It is described
The oil inlet of second oil pump is connect with the oil cylinder, and oil outlet is connect with second fuel tank, second servo motor and institute
The connection of the second oil pump is stated, second servo motor is connect with second motor servo driver, the first servo motor
Driver is connected to the data acquisition control system with second motor servo driver.
A kind of double oil pump hydraulic control methods of fatigue tester, using a kind of double oil pump liquid of above-mentioned fatigue tester
Pressure control system, the control method include the following steps：
Step 1：Arrange parameter, including number, model, maximum value, minimum value, testing time, then start；
Step 2：Computer sends maximum value by serial ports and gives first servo motor driver；
Step 3：First servo motor driver works；
Step 4：First operation of oil pump, fatigue tester load；
Step 5：It is calculated according to frequency, judges whether it then, is then to be transferred to step 6；It is no, then it is transferred to step 4；
Step 6：Minimum value is sent to the second motor servo driver；
Step 7：Second motor servo driver works；
Step 8：Second operation of oil pump, fatigue tester unloading；
Step 9：It is calculated according to frequency, judges whether it then, is then to be transferred to step 10；It is no, then it is transferred to step 8；
Step 10：Judge whether to reach test number (TN), is then to be transferred to step 11；It is no, then it is transferred to step 2；
Step 11：Stop signal is sent to motor servo driver, test terminates.
The advantage of the invention is that：Torque that the present invention is generated by servo motor and rotating speed reach control hydraulic system
The purpose of pressure and flow, since servo motor can adjust torque, rotating speed, and response speed in real time quickly, therefore the stream pumped
Amount can be adjusted by servo motor, and flow needed for system is equal to the flow of pump, therefore greatly reduces power attenuation, to more
Supernumerary segment energy.Fatigue machine is simple in structure, adds unloading frequency high, greatly improves work efficiency, while greatling save the energy.
【Description of the drawings】
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is single operation of oil pump schematic diagram of the prior art.
Fig. 2 is the pump hydraulic power source control device structural schematic diagram in the present invention.
Fig. 3 is the control method flow chart of the present invention.
Fig. 4 is double operation of oil pump schematic diagrames of the present invention.
【Specific implementation mode】
As shown in Fig. 2, a kind of double oil pump hydraulic control systems of fatigue tester, including an oil cylinder 1, a piston 2,1
One fuel tank 3, one first oil pump 4, a first servo motor 5, a first servo motor driver 6, one second fuel tank 7, one second
Oil pump 8, one second servo motor 9, one second motor servo driver 10 and data acquisition control system 11.
The oil inlet of first oil pump 4 is connect with first fuel tank 3, and oil outlet is connect with oil cylinder 1, first servo motor 6
It is connect with the first oil pump 4, first servo motor 5 is connect with first servo motor driver 6；The oil inlet of second oil pump 8 and oil
Cylinder 1 connects, and oil outlet connect with the second fuel tank 7, and the second servo motor 9 is connect with the second oil pump 8, the second servo motor 9 and the
Two motor servo drivers 10 connect, and first servo motor driver 6 is connected to data with the second motor servo driver 10 and adopts
Collect control system 11.
Using a kind of control method of double oil pump hydraulic control systems of above-mentioned fatigue tester, as shown in figure 3, including
Following steps：
Step 1：Arrange parameter, including number, model, maximum value, minimum value, testing time, then start；
Step 2：Computer sends maximum value by serial ports and gives first servo motor driver；
Step 3：First servo motor driver works；
Step 4：First operation of oil pump, fatigue tester load；
Step 5：It is calculated according to frequency, judges whether it then, is then to be transferred to step 6；It is no, then it is transferred to step 4；
Step 6：Minimum value is sent to the second motor servo driver；
Step 7：Second motor servo driver works；
Step 8：Second operation of oil pump, fatigue tester unloading；
Step 9：It is calculated according to frequency, judges whether it then, is then to be transferred to step 10；It is no, then it is transferred to step 8；
Step 10：Judge whether to reach test number (TN), is then to be transferred to step 11；It is no, then it is transferred to step 2；
Step 11：Stop signal is sent to motor servo driver, test terminates.
When work, test specimen is placed on workbench, drives crossbeam to move up and down by crossbeam driving motor, adjusts
Whole good test space.When fatigue tester loads, control system sends instruction first servo motor driver and drives the first servo
Motor drives the first operation of oil pump, and oil cylinder oil inlet, control system sends instructions to the driving of the second motor servo driver when unloading
Second servo motor drives the second operation of oil pump, oil cylinder oil return.As shown in figure 4, the present invention, when adding unloading, the first oil pump loads
When to maximum load, starts the second oil pump at once and unloaded, compared with a previous oil pump is as power source, substantially reduced
Fatigue machine adds the time required for unloading, and greatly improve fatigue tester adds unloaded frequency, therefore greatly improves work
Make efficiency.
Torque that the present invention is generated by servo motor and rotating speed achieve the purpose that control hydraulic system pressure and flow,
Due to servo motor energy real-time adjustment period torque, rotating speed, and response speed is quickly, therefore the flow pumped can pass through servo electricity
Machine adjusts, and flow needed for system is equal to the flow of pump, therefore greatly reduces power attenuation, to more energy saving.
The fatigue machine of the present invention is simple in structure, adds unloading frequency high, greatly improves work efficiency, while greatling save energy
Source.
The foregoing is merely the preferable implementation use-cases of the present invention, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement and improvement etc., should be included in the present invention's made by
Within protection domain.
Claims (1)
1. a kind of double oil pump hydraulic control methods of fatigue tester, it is characterised in that：This method is a kind of tired firstly the need of providing
Double oil pump hydraulic control systems of labor testing machine, the system include：One oil cylinder, a piston, one first fuel tank, one first oil pump,
One first servo motor, a first servo motor driver, one second fuel tank, one second oil pump, one second servo motor, one
Two motor servo drivers and data acquisition control system；The oil inlet of first oil pump is connect with first fuel tank, is gone out
Hydraulic fluid port is connect with the oil cylinder, and the first servo motor is connect with first oil pump, the first servo motor with it is described
First servo motor driver connects；The oil inlet of second oil pump is connect with the oil cylinder, oil outlet and second oil
Case connects, and second servo motor is connect with second oil pump, second servo motor and second servo motor
Driver connects, and the first servo motor driver is connected to the data acquisition with second motor servo driver and controls
System processed；
The control method includes the following steps：
Step 1：Arrange parameter, including number, model, maximum value, minimum value, testing time, then start；
Step 2：Computer sends maximum value by serial ports and gives first servo motor driver；
Step 3：First servo motor driver works；
Step 4：First operation of oil pump, fatigue tester load；
Step 5：It is calculated according to frequency, judges whether it then, is then to be transferred to step 6；It is no, then it is transferred to step 4；
Step 6：Minimum value is sent to the second motor servo driver；
Step 7：Second motor servo driver works；
Step 8：Second operation of oil pump, fatigue tester unloading；
Step 9：It is calculated according to frequency, judges whether it then, is then to be transferred to step 10；It is no, then it is transferred to step 8；
Step 10：Judge whether to reach test number (TN), is then to be transferred to step 11；It is no, then it is transferred to step 2；
Step 11：Stop signal is sent to motor servo driver, test terminates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610935325.8A CN106438531B (en) | 2016-11-01 | 2016-11-01 | A kind of double oil pump hydraulic control systems and control method of fatigue tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610935325.8A CN106438531B (en) | 2016-11-01 | 2016-11-01 | A kind of double oil pump hydraulic control systems and control method of fatigue tester |
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| Publication Number | Publication Date |
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| CN106438531A CN106438531A (en) | 2017-02-22 |
| CN106438531B true CN106438531B (en) | 2018-10-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482134A (en) * | 2008-11-08 | 2009-07-15 | 杭州鑫高科技有限公司 | High-precision fixed-load double-pump control apparatus of hydraulic system |
| CN103939421A (en) * | 2014-03-10 | 2014-07-23 | 北京工业大学 | Fatigue test method and device used for hydraulic cylinder |
| CN104729936A (en) * | 2015-04-13 | 2015-06-24 | 南通理工学院 | Multifunctional fatigue testing machine |
| CN105115839A (en) * | 2015-09-18 | 2015-12-02 | 河海大学 | Fatigue machine equipped with transmission rotating arm |
| CN206268155U (en) * | 2016-11-01 | 2017-06-20 | 福建省计量科学研究院 | A kind of double oil pump hydraulic control systems of fatigue tester |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10123023A (en) * | 1996-10-18 | 1998-05-15 | Hitachi Constr Mach Co Ltd | Testing apparatus for pressure-resistant strength of pressure vessel. |
| US20150059327A1 (en) * | 2013-04-17 | 2015-03-05 | Arthur M. Rabert | Dual channel pulsed variable pressure hydraulic test apparatus |
-
2016
- 2016-11-01 CN CN201610935325.8A patent/CN106438531B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482134A (en) * | 2008-11-08 | 2009-07-15 | 杭州鑫高科技有限公司 | High-precision fixed-load double-pump control apparatus of hydraulic system |
| CN103939421A (en) * | 2014-03-10 | 2014-07-23 | 北京工业大学 | Fatigue test method and device used for hydraulic cylinder |
| CN104729936A (en) * | 2015-04-13 | 2015-06-24 | 南通理工学院 | Multifunctional fatigue testing machine |
| CN105115839A (en) * | 2015-09-18 | 2015-12-02 | 河海大学 | Fatigue machine equipped with transmission rotating arm |
| CN206268155U (en) * | 2016-11-01 | 2017-06-20 | 福建省计量科学研究院 | A kind of double oil pump hydraulic control systems of fatigue tester |
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| CN106438531A (en) | 2017-02-22 |
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