CN102879216A - Comprehensive dynamic rubbing characteristic testing system for ultralow-speed operated hydraulic press - Google Patents
Comprehensive dynamic rubbing characteristic testing system for ultralow-speed operated hydraulic press Download PDFInfo
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- CN102879216A CN102879216A CN2012103564651A CN201210356465A CN102879216A CN 102879216 A CN102879216 A CN 102879216A CN 2012103564651 A CN2012103564651 A CN 2012103564651A CN 201210356465 A CN201210356465 A CN 201210356465A CN 102879216 A CN102879216 A CN 102879216A
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Abstract
The invention discloses a comprehensive dynamic rubbing characteristic testing system for a ultralow-speed operated hydraulic press, which includes a weight regulation mechanical platform, an electrohydraulic servo system and a data acquisition analytical system. The testing system can be used for dynamically testing the comprehensive friction performance of the hydraulic press driven at a ultralow speed, including testing the dynamic characteristics of nonlinear friction between upright posts and a movable cross beam, and internal nonlinear friction of the hydraulic cylinder; the movable cross beam can be stably driven at a ultralow speed through a high-precision magnetic lag displacement sensor, closed loop electrohydraulic servo control, a pressure compensator and a proportional overflow valve; after the mass of a loaded heavy is adjusted, the clearance of the upright posts and a guiding sleeve is adjusted, different tested hydraulic cylinders are adopted, and different drive signals are input, the comprehensive dynamic friction performance of the hydraulic press system including the nonlinear friction between the upright posts and the movable cross beam and the internal nonlinear friction of the hydraulic cylinder can be tested.
Description
Technical field
The present invention relates to a kind of test macro of rubbing characteristics, be specifically related to a kind of test macro of the comprehensive dynamic frictional properties of hydropress of ultralow speed operation.
Background technology
High temperature Ultra-Low Speed die forging technology is to make the main technique means of the difficult processing parts of aviation, requires forging press to possess under the extremely low speed the (＜0.01mm/s) ability of stabilized driving.Studies show that, when pressing machine moves under utmost point low speed because the effect of non-linear friction power, very easily produce creep, the phenomenon such as shake, have a strong impact on the quality of forging.The modeling and compensation control of dynamic friction is the important method of subduing the load distortion, guaranteeing press stable operation, becomes the focus of domestic and international research.The dynamic friction on-line parameter identification of accurately testing based on the system synthesis dynamic friction is basis and the gordian technique means of compensation control research.
Mainly there is the problem of the following aspects in the comprehensive dynamic friction performance test of hydropress method at present:
1, the national standard that the comprehensive dynamic friction performance test of hydropress do not occur only has one one hydraulic cylinder friction force experimental technique, i.e. " GB/T 15622-2005 hydraulic cylinder test method ".The method adopts two hydraulic cylinders that the mode on top is loaded, and by detecting the load pressure reduction in two hydraulic cylinder two chambeies, calculates the friction force of tested hydraulic cylinder.The method has only been calculated the friction force of loading hydraulic cylinder, consideration be the static friction characteristic, can not test pole low speed under rubbing characteristics during operation, thereby the modeling that is not suitable for press system synthesis dynamic friction under the utmost point slow running state is identified with parameter.
2, the disclosed patent relevant with this patent only has " ZL200810237407.0: a kind of test macro of hydraulic cylinder with loading friction force characteristic and method of testing ", and it is the test that realizes friction force that the method adopts by the confining force that forms between test solution cylinder pressure and closed frame.This system needs to consider the impact of sealing frame rigidity when calculating friction force, calculate relatively difficulty; Simultaneously, by the impact of the architectural feature of sealing frame own, its dynamic responding speed is lower, is not suitable for the test for dynamic friction.
Only there is the relevant practice of separately servo hydraulic cylinder friction force being tested in comprehensive present Research both at home and abroad, and there is no hydropress, and especially utmost point slow running hydropress carries out the precedent of dynamic frictional properties test.
Summary of the invention
Technical matters to be solved by this invention provides a kind of friction force that can consider simultaneously the motor-driven beam of pressure and column, different driving hydraulic cylinder inside, realizes the test macro of the comprehensive dynamic frictional properties of Ultra-Low Speed operation hydropress of the comprehensive rubbing characteristics test that hydropress moves under utmost point low speed.
In order to solve the problems of the technologies described above, the test macro of the comprehensive dynamic frictional properties of Ultra-Low Speed operation hydropress provided by the invention, regulate mechanical platform, electrohydraulic servo system and data collection and analysis system by weight and consist of, weight is regulated and is placed the adjustable weight of weight on the mechanical platform; Electrohydraulic servo system drives the weight weighted platform and carries out at a slow speed back and forth movement of the utmost point; The collection of the signals such as data collection and analysis system pressure charge, displacement and carry out data storage and analysis, the structure that described weight is regulated mechanical platform is: base fixes on the ground and couples together the power system that forms a sealing by four root posts with putting the beams in place, moved cross beam is by orienting sleeve and four described column clearance fit, described moved cross beam is connected with hydraulic cylinder list ball pivot on being located at described base, and the weight of adjustable weight is installed on the described moved cross beam;
The structure of described electrohydraulic servo system is: oil pump connects with motor coaxle, the inlet port U of described oil pump communicates with fuel tank, the oil-out of described oil pump communicates with the P mouth of electrohydraulic servo valve by filtrator, the A mouth of described electrohydraulic servo valve or B mouth communicate with the rodless cavity of described hydraulic cylinder, and the B mouth of described electrohydraulic servo valve or A mouth communicate with the rod chamber of described hydraulic cylinder; The T mouth of described electrohydraulic servo valve communicates with fuel tank; The P mouth in-line of described electrohydraulic servo valve is equipped with a pressure compensator; Between the P of described electrohydraulic servo valve mouth force feed pipeline and T mouth scavenge pipe, be connected with proportional pressure control valve;
The structure of described data collection and analysis system is: four angle points of 4 telescopic installation of sensors of mangneto displacement between described moved cross beam and described upper beam, the shift value of four angle points of described moved cross beam that four telescopic sensors of described mangneto displacement are measured is weighted on average, input to described electrohydraulic servo valve as feedback quantity, the first pressure transducer, the second pressure transducer are respectively applied to measure the pressure P of rod chamber and the rodless cavity of described hydraulic cylinder
1, P
2, two pressure signals and four displacement signals of gathering all input in the computing machine by data collecting card, carry out data analysis and processing.
The resolution of the telescopic sensor of described mangneto displacement reaches 0.2 μ m, realizes the accurate measurement of extremely low speed bottom offset.
Adopt the test macro of the comprehensive dynamic frictional properties of Ultra-Low Speed operation hydropress of technique scheme, base fixes on the ground and couples together the power system that forms a sealing by four root posts with putting the beams in place; Moved cross beam and four root post clearance fit, with the interaction of orienting sleeve under finish the vertically-guided of moved cross beam; The clearance fit amount is adjusted in advance according to different testing requirements; Moved cross beam is connected with hydraulic cylinder list ball pivot, along with the piston rod of hydraulic cylinder moves up and down; The weight of adjustable weight is connected on movable the measurement by the bolt that is fixed on the moved cross beam, realizes the test of system's non-linear friction characteristic under the different loads effect.The P mouth in-line of electrohydraulic servo valve is installed a pressure compensator, by the comparison and adjusting of oil pump top hole pressure and electrohydraulic servo valve A mouth or B mouth top hole pressure, realizes the stable of electrohydraulic servo valve inlet outlet pressure differential; Between the P of electrohydraulic servo valve mouth force feed pipeline and T mouth scavenge pipe, be connected with proportional pressure control valve.4 telescopic installation of sensors of mangneto displacement are between moved cross beam and upper beam, and sensor resolution reaches 0.2 μ m, can realize the accurate measurement of extremely low speed bottom offset; The shift value of four angle points of moved cross beam that four telescopic sensors of mangneto displacement are measured is weighted on average, inputs to electrohydraulic servo valve as feedback quantity, realizes that the closed loop of system drives.The first pressure transducer, the second pressure transducer are respectively applied to measure the pressure P of hydraulic cylinder rod chamber and rodless cavity
1, P
2Two pressure signals and four displacement signals of gathering all input in the computing machine by data collecting card, carry out data analysis and processing.
The present invention considers the comprehensive dynamic friction force characteristic of column and moved cross beam and different structure hydraulic cylinder inside simultaneously.This test macro can be realized the function of Ultra-Low Speed stabilized driving.To the pressure compensation of servo-valve import and export and the functions such as backpressure regulation of electromagnetic proportion relief valve, realize the Ultra-Low Speed stabilized driving by high-accuracy magnetic hysteresis displacement transducer, the control of closed loop electrohydraulic servo valve, pressure compensator.Loaded weight is adjustable, can realize the test of different loads effect downforce machine system synthesis rubbing characteristics, also can study utmost point driven at low speed lower to pressure reduction (Δ p=|p
1-p
2|), the factor such as encapsulant, lubricating condition is on the rule that affects of the comprehensive rubbing characteristics of hydropress.
In sum, the present invention is a kind of friction force that can consider simultaneously the motor-driven beam of pressure and column, different driving hydraulic cylinder inside, realizes the test macro of the comprehensive dynamic frictional properties of Ultra-Low Speed operation hydropress of the comprehensive rubbing characteristics test that hydropress moves under utmost point low speed.
Description of drawings
Fig. 1 is the comprehensive rubbing characteristics dynamic test system of hydropress schematic diagram.
Fig. 2 is that weight is regulated the mechanical platform structural representation.
Embodiment
Below in conjunction with accompanying drawing the present invention is made further analytic explanation.
Referring to Fig. 1 and Fig. 2, the test macro of the comprehensive dynamic frictional properties of a kind of Ultra-Low Speed operation hydropress is regulated mechanical platform, electrohydraulic servo system and data collection and analysis system by weight and is consisted of, and weight is regulated and placed the adjustable weight of weight on the mechanical platform; Electrohydraulic servo system drives the weight weighted platform and carries out at a slow speed back and forth movement of the utmost point; The collection of the signals such as data collection and analysis system pressure charge, displacement and carry out data storage and analysis, its structure is as follows respectively:
The structure that weight is regulated mechanical platform is: base 1 fixes on the ground and by four root posts 2 and 8 power that couple together a sealing of formation of putting the beams in place is, moved cross beam 4 is by orienting sleeve 6 and four root posts, 2 clearance fit, moved cross beam 4 is connected with hydraulic cylinder 5 single ball pivots on being located at base 1, and the weight 7 of adjustable weight is installed on the moved cross beam 4;
The structure of electrohydraulic servo system is: oil pump 19 and 21 coaxial connections of motor, the inlet port U of oil pump 19 communicates with fuel tank 20, the oil-out of oil pump 19 communicates with the P mouth of electrohydraulic servo valve 15 by filtrator 18, the A mouth of electrohydraulic servo valve 15 communicates with the rodless cavity of hydraulic cylinder 5, the B mouth of electrohydraulic servo valve 15 communicates with the rod chamber of hydraulic cylinder 5, or the B mouth of electrohydraulic servo valve 15 communicates with the rodless cavity of hydraulic cylinder 5, the A mouth of electrohydraulic servo valve 15 communicates with the rod chamber of hydraulic cylinder 5, and the T mouth of electrohydraulic servo valve 15 communicates with fuel tank; The P mouth in-line of electrohydraulic servo valve 15 is equipped with a pressure compensator 16; Between the P of electrohydraulic servo valve 15 mouth force feed pipeline and T mouth scavenge pipe, be connected with proportional pressure control valve 17;
The structure of data collection and analysis system is: 4 telescopic sensors 3 of mangneto displacement, 11 are installed in moved cross beam 4 and four angle points between 8 of putting the beams in place, the telescopic sensor 3 of mangneto displacement, 11 resolution reach 0.2 μ m, realize the accurate measurement of extremely low speed bottom offset, the shift value of four telescopic sensors 3 of mangneto displacement, 11 measured 4 four angle points of moved cross beam is weighted on average, input to the pressure P that electrohydraulic servo valve 15, the first pressure transducers 12, the second pressure transducer 13 are respectively applied to measure rod chamber and the rodless cavity of hydraulic cylinder 5 as feedback quantity
1, P
2, two pressure signals and four displacement signals of gathering all input in the computing machine 9 by data collecting card 10, carry out data analysis and processing.
Referring to Fig. 1 and Fig. 2, principle of work of the present invention is as follows: four root posts 2 are rigidly connected with upper beam 8, base 1, consist of the general frame form.Tested hydraulic cylinder 5 is vertically fixed on the base 1, and the piston rod of hydraulic cylinder 5 utilizes single ball pivot to link to each other with moved cross beam 4.Moved cross beam 4 relies on orienting sleeve 6 guiding, and the weight 7 of adjustable weight is positioned on the moved cross beam 4, moves up and down with moved cross beam 4.The displacement of 4 four angle points of moved cross beam is measured by the telescopic sensor 3 of mangneto displacement, 11, and the speed of moved cross beam 4, acceleration can be found the solution respectively first order derivative and second derivative acquisition to displacement by programming.Sinusoidal signal or step signal form input signal by D/A converter; The displacement signal of four telescopic sensors 3 of mangneto displacement, 11 measured 4 four angle points of moved cross beam is by after the weighted mean, form feedback signal, and compare with input signal, be input to the closed-loop control that forms speed in the electrohydraulic servo valve 15 through amplifier, so that the piston rod of hydraulic cylinder 5 moves according to set speed; 5 liang of cavity pressure P of hydraulic cylinder
1, P
2Measured by the first pressure transducer 12, the second pressure transducer 13 respectively, then be input to computing machine 9 and process through A/D converter, data collecting card 10.
The hydraulic servo control system of finishing moved cross beam 4 utmost point driven at low speed by variable output pump be oil pump 19 from fuel tank 20 oil suctions, enter electrohydraulic servo valve 15 through filtrator 18, pressure compensator 16.Input signal with forms contrast by four the telescopic sensors 3 of mangneto displacement, 11 displacement signals that feed back, after amplifier carries out signal amplification, input to electrohydraulic servo valve 15, the closed-loop control of formation output speed; Pressure compensator 16 is used for regulating the pressure reduction that electrohydraulic servo valve 15 is imported and exported, and keeps the stable of pressure reduction; Proportional pressure control valve 17 is installed in the oil revolving end of electrohydraulic servo valve 15, guarantees the stability of moved cross beam 4 motions.
To the piston rod Overall Analysis of moved cross beam 4 and hydraulic cylinder 5, can obtain comprehensive friction force size according to Newton second law and be:
In the formula, the m amount (adjustable) of attaching most importance to; m
sGross mass for weighted platform and hydraulic cylinder piston rod; A
1Be hydraulic cylinder rodless cavity area; A
2Be hydraulic cylinder rod chamber area; G is acceleration of gravity; A is the acceleration of weighted platform;
This test macro course of work is as follows: electrohydraulic servo valve 15 control hydraulic cylinders 5 move up and down, weight 7 and moved cross beam 4 are followed the piston up-down of hydraulic cylinder 5, the telescopic sensor 3 of upper and lower cavity pressure signal, mangneto displacement of the hydraulic cylinder 5 that the first pressure transducer 12, the second pressure transducer 13 gather, 11 weighted platform displacement signal are sent into computing machine 9 through A/D converter, data collecting card 10, the programmable software that is installed in the computing machine 9 obtains comprehensive friction force size according to (1) formula, and real-time rendering goes out F
r-v(friction force-speed), F
r-t(friction force-time), v-t(Velocity-time), F
r-Δ p(friction force-pressure differential) curve and the output such as.
Claims (2)
1. the test macro of the comprehensive dynamic frictional properties of Ultra-Low Speed operation hydropress is regulated mechanical platform, electrohydraulic servo system and data collection and analysis system by weight and is consisted of, and weight is regulated and placed the adjustable weight of weight on the mechanical platform; Electrohydraulic servo system drives the weight weighted platform and carries out at a slow speed back and forth movement of the utmost point; The collection of the signals such as data collection and analysis system pressure charge, displacement and carry out data storage and analysis is characterized in that:
The structure that described weight is regulated mechanical platform is: base (1) fixes on the ground and couples together the power that forms a sealing by four root posts (2) and put the beams in place (8) and is, moved cross beam (4) is by orienting sleeve (6) and four described columns (2) clearance fit, described moved cross beam (4) is connected with the single ball pivot of hydraulic cylinder (5) on being located at described base (1), and the weight of adjustable weight (7) is installed on the described moved cross beam (4);
The structure of described electrohydraulic servo system is: oil pump (19) and coaxial connection of motor (21), the inlet port U of described oil pump (19) communicates with fuel tank (20), the oil-out of described oil pump (19) communicates by the P mouth of filtrator (18) with electrohydraulic servo valve (15), the A mouth of described electrohydraulic servo valve (15) or B mouth communicate with the rodless cavity of described hydraulic cylinder (5), and the B mouth of described electrohydraulic servo valve (15) or A mouth communicate with the rod chamber of described hydraulic cylinder (5); The T mouth of described electrohydraulic servo valve (15) communicates with fuel tank; The P mouth in-line of described electrohydraulic servo valve (15) is equipped with a pressure compensator (16); Between the P mouth force feed pipeline of described electrohydraulic servo valve (15) and T mouth scavenge pipe, be connected with proportional pressure control valve (17);
The structure of described data collection and analysis system is: 4 telescopic sensors (3 of mangneto displacement, 11) be installed in four angle points between described moved cross beam (4) and the described upper beam (8), four telescopic sensors (3 of described mangneto displacement, 11) shift value of measured (4) four angle points of described moved cross beam is weighted on average, input to described electrohydraulic servo valve (15) as feedback quantity, the first pressure transducer (12), the second pressure transducer (13) is respectively applied to measure the rod chamber of described hydraulic cylinder (5) and the pressure P of rodless cavity
1, P
2, two pressure signals that gather and four displacement signals all pass through data collecting card (10) and input in the computing machine (9), carry out data analysis and processing.
2. Ultra-Low Speed according to claim 1 moves the test macro of the comprehensive dynamic frictional properties of hydropress, and it is characterized in that: the resolution of the telescopic sensor of described mangneto displacement (3,11) reaches 0.2 μ m, realizes the accurate measurement of extremely low speed bottom offset.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198170A (en) * | 2014-08-26 | 2014-12-10 | 北京精密机电控制设备研究所 | Front-oscillation center spray pipe load simulating friction loading device |
| CN104847733A (en) * | 2015-05-07 | 2015-08-19 | 北京理工大学 | Air cylinder having friction force estimation function |
| CN106338330A (en) * | 2016-10-31 | 2017-01-18 | 中冶华天南京工程技术有限公司 | Injecting and blowing tank weighing and calibrating system |
| CN106644530A (en) * | 2016-11-23 | 2017-05-10 | 中车齐齐哈尔车辆有限公司 | Test apparatus, fatigued test method and output force test method of railway freight car integrated brake cylinder |
| CN107290089A (en) * | 2017-07-28 | 2017-10-24 | 武汉轻工大学 | A kind of easy-to-mount friction testing device |
| CN107542726A (en) * | 2016-06-29 | 2018-01-05 | 宝山钢铁股份有限公司 | Simulate the servo-cylinder performance testing equipment of actual condition |
| CN108412842A (en) * | 2018-05-04 | 2018-08-17 | 哈尔滨理工大学 | Hydraulic cylinder friciton compensation control method research |
| CN108680354A (en) * | 2018-07-19 | 2018-10-19 | 中国人民解放军陆军装甲兵学院 | Gear Fatigue Testing Loads loading device |
| CN109682628A (en) * | 2019-01-04 | 2019-04-26 | 武汉船用机械有限责任公司 | The experimental rig of raise-lower hydraulic machine |
| CN111929056A (en) * | 2020-09-03 | 2020-11-13 | 中国铁道科学研究院集团有限公司 | Sealing member motion resistance testing device |
| CN114278647A (en) * | 2021-12-23 | 2022-04-05 | 济南瑞原液压气动设备有限公司 | Loading test device of servo hydraulic cylinder |
| CN115059662A (en) * | 2022-06-09 | 2022-09-16 | 杭州电子科技大学 | Nonlinear frictional resistance simulation test device and method for inlet guide vane electrohydraulic servo system |
| CN115059662B (en) * | 2022-06-09 | 2024-07-02 | 杭州电子科技大学 | Nonlinear friction resistance simulation test device and method for inlet guide vane electrohydraulic servo system |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198170B (en) * | 2014-08-26 | 2017-01-25 | 北京精密机电控制设备研究所 | Front-oscillation center spray pipe load simulating friction loading device |
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| CN104847733A (en) * | 2015-05-07 | 2015-08-19 | 北京理工大学 | Air cylinder having friction force estimation function |
| CN107542726A (en) * | 2016-06-29 | 2018-01-05 | 宝山钢铁股份有限公司 | Simulate the servo-cylinder performance testing equipment of actual condition |
| CN107542726B (en) * | 2016-06-29 | 2019-06-25 | 宝山钢铁股份有限公司 | Simulate the servo-cylinder performance testing equipment of actual condition |
| CN106338330A (en) * | 2016-10-31 | 2017-01-18 | 中冶华天南京工程技术有限公司 | Injecting and blowing tank weighing and calibrating system |
| CN106644530A (en) * | 2016-11-23 | 2017-05-10 | 中车齐齐哈尔车辆有限公司 | Test apparatus, fatigued test method and output force test method of railway freight car integrated brake cylinder |
| CN107290089A (en) * | 2017-07-28 | 2017-10-24 | 武汉轻工大学 | A kind of easy-to-mount friction testing device |
| CN108412842A (en) * | 2018-05-04 | 2018-08-17 | 哈尔滨理工大学 | Hydraulic cylinder friciton compensation control method research |
| CN108680354A (en) * | 2018-07-19 | 2018-10-19 | 中国人民解放军陆军装甲兵学院 | Gear Fatigue Testing Loads loading device |
| CN109682628A (en) * | 2019-01-04 | 2019-04-26 | 武汉船用机械有限责任公司 | The experimental rig of raise-lower hydraulic machine |
| CN111929056A (en) * | 2020-09-03 | 2020-11-13 | 中国铁道科学研究院集团有限公司 | Sealing member motion resistance testing device |
| CN114278647A (en) * | 2021-12-23 | 2022-04-05 | 济南瑞原液压气动设备有限公司 | Loading test device of servo hydraulic cylinder |
| CN115059662A (en) * | 2022-06-09 | 2022-09-16 | 杭州电子科技大学 | Nonlinear frictional resistance simulation test device and method for inlet guide vane electrohydraulic servo system |
| CN115059662B (en) * | 2022-06-09 | 2024-07-02 | 杭州电子科技大学 | Nonlinear friction resistance simulation test device and method for inlet guide vane electrohydraulic servo system |
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Application publication date: 20130116 |