CN101975660B - The control device of bearing ball contact fatigue testing machine and control method thereof - Google Patents
The control device of bearing ball contact fatigue testing machine and control method thereof Download PDFInfo
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Abstract
The present invention relates to control device and the control method thereof of bearing ball contact fatigue testing machine.Control device comprises the first proximity switch, second proximity switch, pressure transducer, oil pressure sensor, vibration transducer, temperature sensor, vibration signal amplifier, temperature signal amplifier, A/D modular converter, driver module, frequency converter, proximity switch, pressure transducer is connected with the input end of oil pressure sensor with A/D modular converter, vibration signal amplifier is connected with corresponding vibration transducer and temperature sensor respectively with the input end of temperature signal amplifier, output terminal connects with the corresponding input end of computing machine and driving circuit respectively, driving circuit output terminal connects the Oil pump electrical machinery in described lubricating structure, first motor and frequency converter, frequency converter connects the second motor.Control method comprises selects power on mode, parameters, test kind to select, provide load, carry out the steps such as analyzing and processing to input signal.Advantage is that labour intensity is low, and fault processes in time, and equipment is protected.
Description
Technical field
The present invention relates to the torture test in mechanical field, particularly relate to control device and the control method thereof of bearing ball contact fatigue testing machine.
Background technology
The contact fatigue life of rolling bearing ball is under standard condition condition, evaluates one of Main Means of bearing material performance and processing technology quality.Rolling bearing ball contact fatigue life is obtained by corresponding contact fatigue test machine.This testing machine primarily of driving wheel 1, guide wheel 13, left support roller 16, examination roller 15 is accompanied on right support roller 7, a left side, examination roller 6 is accompanied on the right side and driving mechanism composition, can see Fig. 1 and corresponding published CN2608972Y, CN101241044A Chinese patent application.Driving mechanism drives driving wheel and guide wheel and support roller respectively, left and right is accompanied examination roller and guide wheel upper end and corresponding support roller interior side contacts and produces rolling, bearing test Ball support is accompanied on examination roller in left and right, upper end contacts with the driving wheel of bearing load weight, the rolling through with driving wheel and correspondingly accompany the frictional force drives tried roller contact point place and produce of test ball.
Bearing ball rolling contact fatigue life test has the advantages that the test period is long, noise is large and destructiveness is strong, so the whole bearing ball torture test process controlled by manual operation at present, bring following problem: experimenter's labour intensity is large, recording process is tediously long, complicated, inevitably causes error; Testing machine breaks down, often because of manual monitoring process not in time, cause the damage of other mechanical part.In addition, manually operated fatigue life test machine also can cause erroneous judgement because of some interference, as the error of manual observation, not yet lost efficacy tried to be mistaken as was lost efficacy and stopped torture test, the test figure that obtains can not be used, the human, financial, and material resources power consumed before this is done experiment and has just been wasted, and substantially increases experimentation cost etc. thus.More seriously, sample ball, once inefficacy or testing machine break down, if shut down not in time, will produce chain reaction, cause whole device damage, not only cause certain economic loss, and entail dangers to is personal and property safety.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art, provide a kind of control device and the control method thereof that can realize the bearing ball contact fatigue testing machine of Based Intelligent Control, for achieving the above object, the present invention adopts following technical proposals:
Described control device, is arranged on primarily of driving wheel, guide wheel, support roller, accompany examination roller, first motor of transmission driving wheel, transmission guide wheel and support roller and in regulate guide wheel rotating speed to make it fatigue tester that the second motor equal with driving wheel rotating speed and lubricating structure form, it is characterized in that described control device comprises force snesor, oil pressure sensor, vibration transducer, temperature sensor, vibration signal amplifier, temperature signal amplifier, A/D modular converter, driver module, frequency converter and for the tach signal of the driving wheel that gathers respectively and guide wheel to carry out the first proximity switch of analyzing and processing, second proximity switch, described proximity switch, force snesor is connected with the input end of oil pressure sensor with A/D modular converter, described vibration signal amplifier is connected with corresponding vibration transducer and temperature sensor respectively with the input end of temperature signal amplifier, output terminal connects with the corresponding input end of computing machine and driving circuit respectively, and driving circuit output terminal connects the Oil pump electrical machinery in described lubricating structure, described first motor and frequency converter, frequency converter connects the second motor.
Described driving circuit is made up of input resistance R, switching tube G, relay K A and contactor KM and interlock button SB2 ˊ, select button SB2, start button SB3, stop button SB4, input resistance R one end is connected with an output terminal of described A/D modular converter, the base stage of one end connecting valve pipe G, the coil tandem of relay K A is on the collector of switching tube G; Interlock button SB2 ˊ and select button SB2 link, and the button SB2 ˊ that realizes linking opens select button SB2 and to close or the button SB2 ˊ that links closes the state that select button SB2 opens; The normally opened contact of relay K A be attempted by after being connected in series with interlock button SB2 ˊ select button SB2, start button SB3 and stop button SB4 be connected in series after two ends, one normally opened contact of contactor is attempted by select button SB3 two ends, forms the output terminal V of driving circuit after contactor coil is connected in series with select button SB2, start button SB3, stop button SB4
l, this output terminal connects Oil pump electrical machinery M3 and connects the first motor and frequency converter respectively by two normally opened contacts of described contactor.
The further design of described control device is, described first proximity switch and the second proximity switch are placed in the side of driving wheel and guide wheel respectively, for measuring the rotation number of turns of corresponding wheel.
The further design of described control device is, described force snesor is placed in the side that described driving wheel contacts with described bearing ball, for measuring the load added by bearing ball; Described force snesor is placed in the side that described driving wheel contacts with described bearing ball, for measuring the load added by bearing ball; Described oil pressure sensor is placed in the oil circuit of described lubricating structure, for measuring the oil pressure of oil circuit; Described vibration transducer is placed on the rotation axis of driving wheel, and for measuring driving wheel amplitude, described temperature sensor is placed in bearing ball and accompanies between examination roller, for measuring the temperature of bearing ball.
The control method of described control device, comprises the steps:
1) power on mode is selected, knob SB2 is selected by turn, select manually start or Auto Power On, if select manual power on mode, turn SB2 ˊ makes it close, and the power knob SB1 on power circuit closes, oil pump is opened, press device described in start button SB3 again to start working, as device as described in making quits work, press stop button SB4; If selection Auto On Mod, then undertaken by following program;
2) parameters, the input through keyboard following parameters by described computing machine: temperature pre-warning value T, vibration early warning value V, oil pressure early warning value P, working time H;
3) automatic control program is opened;
4) kind of torture test is selected;
5) gathered by force snesor and show initial load value, providing the load needing to increase or reduce, show final operating load;
6) gather coherent signal by described proximity switch and sensor, the signal of collection is changed through the A-D analog-digital of A/D modular converter, and corresponding digital signals is input to described computing machine, is handled as follows;
7) driving wheel that described in foundation two, proximity switch gathers respectively and the tach signal of guide wheel, differentiate that bearing ball has fricton-tight, as identical in both rotating speeds, fricton-tight; As both rotating speeds are not identical, there is slip, regulate guide wheel speed, make both rotating speeds identical;
8) analysis of whether arriving setting test period judges, is non-fully torture test as what carry out, carries out analysiss working time judge described fatigue tester, if if working time < T, described fatigue tester continues operation; If working time >=T do not shut down, and sends alerting signal;
9) analysis of other correlation parameter judges:
If a. vibration signal < V, continue to gather next vibration signal; If vibration signal >=V, sends alerting signal, described fatigue tester is shut down;
If b. temperature signal < T, continue to gather next temperature signal; If temperature signal >=T, sends alerting signal, described fatigue tester is shut down;
If c. fuel injection pressure signal > P, continue to gather next fuel injection pressure signal; If fuel injection pressure signal≤P, sends alerting signal, described fatigue tester is shut down.
The present invention records rotating speed between driving wheel and guide wheel according to the first proximity switch and the second proximity switch, judge whether the bearing ball tested produces slip, drive guide wheel from the motor speed rotated by automatically regulating, make driving wheel consistent with the rotating speed of guide wheel, to eliminate by the skid state of trying, it is made to be in pure rolling state.In addition, the present invention is by the multiple physical signalling of polytype sensor pickup CHARACTERISATION TESTS machine state, these signals comprise the signals such as loaded load, vibration, oil temperature and oil pressure, these physical quantitys through sensor sensing become digital signal to be sent to computing machine through A/D module transitions, computing machine carries out analyzing and processing according to the rule of setting and ultimate value to these signals, as met a certain rule or exceeding set ultimate value, the control signal or the alerting signal that produce correspondence control testing machine or make testing machine automatic shutdown.Produce such beneficial effect thus: process of the test and result are by computing machine record automatically and accurately, the duty of accurate identification sample ball, artificial erroneous judgement can not be produced and cause test to stop and the waste of consequent human, financial, and material resources power, save experimentation cost, greatly alleviate experimenter's labour intensity simultaneously, improve the automaticity of test efficiency and test.Testing machine, by computer monitoring, can process in time once break down, and can eliminate the damage of the mechanical part that may be caused by these faults.Test can be made thus safer, and equipment is protected better, warranty test machine reliably runs effectively.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of fatigue tester and sensor setting position.
Fig. 2 is the structural representation of control device of the present invention.
Fig. 3 is the control block diagram of control device of the present invention.
In figure, 1 vibration transducer, 2 driving wheels, 3 thermopairs, 4 oil pipelines, 5 sample balls, examination roller is accompanied on 6 right sides, 7 right support rollers, 8 oil pressure sensors, 9 fuel tanks, 10 first proximity switches, 13 guide wheels, examination roller is accompanied on 14 left sides, 15 force snesor, 16 left support rollers, 17 second proximity switches, 19-temperature signal amplifier, 21A/D modular converter, 22 vibration signal amplifiers, 23 driving circuits, 24 frequency converters, 25 computing machines
Embodiment
Control device of the present invention is placed in the bearing ball contact fatigue testing machine shown in Fig. 1, this testing machine is primarily of driving wheel 2, guide wheel 13, left support roller 16, right support roller 7, examination roller 14 is accompanied on a left side, examination roller 6 is accompanied on the right side, first motor (not shown) of transmission driving wheel 2, transmission guide wheel 13 and two support rollers 7, the second motor (not shown) of 16 and lubricating structure composition, examination roller 14 is accompanied in left and right, 6 with guide wheel 13 upper end and corresponding left and right support roller interior side contacts, examination roller 14 is accompanied in left and right, the rolling of 6 by guide wheel 13 with have with it the back-up roller transmission contacted.Bearing test ball 5 be bearing in left and right accompany examination roller 14,6 on, the lower end in contact of the upper end of bearing test ball 5 and the driving wheel 2 of bearing load weight, test ball 5 roll through driving wheel 2, left and right accompany examination roller 14,6 driving.
Control device of the present invention as shown in Figure 2, forms primarily of the first proximity switch 10, second proximity switch 17, force snesor 15, oil pressure sensor 8, vibration transducer 1, temperature sensor (thermopair 3), vibration signal amplifier 22, temperature signal amplifier 19, A/D modular converter 21, driver module 23 and frequency converter 24.First proximity switch 10, second proximity switch 17, force snesor 15 are connected with the input end of oil pressure sensor 8 with A/D modular converter 21, vibration signal amplifier 22 is connected with vibration transducer 1 and thermopair 3 respectively with the input end of temperature signal amplifier 19, and the output terminal of A/D modular converter 21 connects with the corresponding input end of computing machine 25 and driving circuit 23 respectively.Driving circuit 23 is made up of input resistance R, switching tube G, relay K A and contactor KM and interlock button SB2 ˊ, select button SB2, start button SB3, stop button SB4, relay and contactor.Input resistance R one end is connected with an output terminal of described A/D modular converter, and the base stage of one end connecting valve pipe G, the coil tandem of relay K A is on the collector of switching tube G.Interlock button SB2 ˊ and select button SB2 links, that is: when the button SB2 ˊ that links is in open mode, select button SB2 is in closure state; Maybe when the button SB2 ˊ that links is in closure state, select button SB2 is in open mode.The normally opened contact of relay K A is attempted by the two ends after being connected in series by select button SB2, start button SB3 and stop button SB4 after being connected in series with interlock button SB2 ˊ.The normally opened contact of contactor is attempted by select button SB3 two ends, forms the output terminal V of driving circuit after contactor coil is connected in series with select button SB2, start button SB3, stop button SB4
l, this output terminal connects Oil pump electrical machinery M3 and connects the first motor M 1 and frequency converter 24 respectively by two normally opened contact KM of described contactor.Second motor M 2 is coupled with frequency converter 24, to obtain the power supply of respective frequencies.
The first above-mentioned proximity switch 10, second proximity switch 17 adopts TL-5MC1 type Hall element, for the rotating speed of driving wheel 2 and guide wheel 13 in testing machine shown in survey sheet 1, is placed in corresponding driving wheel and the side of introduction respectively.Force snesor 15 adopts CL-YD-301 type force snesor, and this force snesor is placed in the side that driving wheel 2 contacts with sample ball 5, for measuring the load added by bearing ball.Oil pressure sensor 8 adopts PTT206 type oil pressure sensor, is placed in the oil circuit 4 of the lubricating structure of testing machine, for measuring the oil pressure of oil circuit.Vibration transducer 1 adopts CA-YD-103 type, and this sensor 1 is placed on the rotation axis of driving wheel 2, for measuring the amplitude of driving wheel 2.Temperature sensor adopts T-500 type thermopair 3 to be placed in sample ball 5 and accompanies between examination roller 6 (14), for measuring the temperature of sample ball 5.A/D modular converter adopts NI6212 capture card.Switching tube G adopts power switch pipe TIP122 Darlington transistor.
Contrast Fig. 3, the control method of above-mentioned control device, carry out as follows:
1) first select power on mode, select button SB2 to select manually start or Auto Power On by turn.If select manual power on mode, turn select button, to SB2, makes this button close.Power knob SB1 on power circuit closes, and Oil pump electrical machinery M3 works, and oil pump is opened.Pressing start button SB3 again makes apparatus of the present invention start working, and as made apparatus of the present invention quit work, presses stop button SB4.If selection Auto On Mod, turn select button, to SB2 ', makes this button close, is then undertaken by following program:
2) then parameters, the input through keyboard correlation parameter by apparatus of the present invention Computer: temperature pre-warning value T, vibration early warning value V, oil pressure early warning value P, working time H.
3), after above-mentioned request sends, described computing machine sends the request of opening automatic control program.
4) select the kind of torture test, completely whether to, torture test is selected, and if not being complete torture test, sets test period.
5) gather initial load value, first computing machine sends the signal gathering load, then according to the initial load value gathered and the operating load value preset, is shown the load value needing to increase or reduce by display.
6) gather correlation parameter, computing machine sends collecting temperature, vibration, oil pressure value, driving wheel and guide wheel and rotates the number of turns and the signal of working time.The signal that first proximity switch, the second proximity switch gather, is input to NI6212 capture card through input port DI1 and DI2, carries the driving wheel of current collection and guide wheel to rotate the number of turns, thus obtains the rotating speed of driving wheel and guide wheel; The signal of force snesor pickup enters above-mentioned capture card through input port AI2 and AI1 respectively, obtains the size of loaded load, thus obtains contact stress value; The vibration signal of vibration transducer pickup is input to NI6212 capture card by after corresponding amplifier amplification through input port AI3; Oil pressure sensor enters above-mentioned capture card to input fuel injection pressure signal through AI1; The temperature signal of temperature sensor and thermopair collection enters above-mentioned capture card by corresponding signal amplifier through input port AI4.Capture card data output DO outputs signal the disconnection of pilot relay KA, and after the disconnection of relay K A, contactor KM also disconnects, thus namely the closedown controlling motor shuts down, and the above-mentioned signal of Computer Storage also passes through corresponding display display.Its concrete processing procedure process described as follows:
7) prevent bearing ball from producing the control of sliding, the tach signal of the driving wheel that computing machine gathers respectively according to first, second proximity switch and guide wheel to carry out analyzing and processing, thus differentiates that bearing ball has fricton-tight.If driving wheel is identical with the rotating speed of guide wheel, fricton-tight; If driving wheel is not identical with the rotating speed of guide wheel, there is slip, then adjust the rotating speed of guide wheel.Now start frequency converter, regulate the rotating speed driving guide wheel motor M 2, until the rotating speed of driving wheel and guide wheel is equal.
8) whether arriving the analyzing and processing of setting test period, is non-fully torture test as what carry out, carries out analysiss working time judge described fatigue tester, if if working time < T, described fatigue tester continues operation; If working time >=T do not shut down, and sends alerting signal, and described fatigue tester is shut down, and shows the prompting of " test period arrives " on corresponding display;
9) analyzing and processing of other correlation parameter:
If a. vibration signal < V, continue to gather next vibration signal; If vibration signal >=V, sends alerting signal, described fatigue tester is shut down, corresponding display shows " bearing ball lost efficacy or other rotating part damages, and please check ... " prompting;
If b. temperature signal < T, continue to gather next temperature signal; If temperature signal >=T, sends alerting signal, described fatigue tester is shut down, corresponding display shows " temperature is too high, please check that whether lubrication normal ... " prompting;
If c. fuel injection pressure signal > P, continue to gather next fuel injection pressure signal; If fuel injection pressure signal≤P, sends alerting signal, described fatigue tester is shut down, corresponding display shows " oil pressure of lubricating system is abnormal, please check ... " prompting.
Claims (5)
1. the control device of bearing ball contact fatigue testing machine, is arranged on primarily of driving wheel, guide wheel, support roller, accompany examination roller, first motor of transmission driving wheel, transmission guide wheel and support roller and in regulate guide wheel rotating speed to make it fatigue tester that the second motor equal with driving wheel rotating speed and lubricating structure form, it is characterized in that described control device comprises force snesor, oil pressure sensor, vibration transducer, temperature sensor, vibration signal amplifier, temperature signal amplifier, A/D modular converter, driver module, frequency converter and for the tach signal of the driving wheel that gathers respectively and guide wheel to carry out the first proximity switch of analyzing and processing, second proximity switch, described proximity switch, force snesor is connected with the input end of oil pressure sensor with A/D modular converter, described vibration signal amplifier is connected with corresponding vibration transducer and temperature sensor respectively with the input end of temperature signal amplifier, output terminal connects with the corresponding input end of computing machine and driving circuit respectively, and driving circuit output terminal connects the Oil pump electrical machinery in described lubricating structure, described first motor and frequency converter, frequency converter connects the second motor.
2. the control device of bearing ball contact fatigue testing machine according to claim 1, it is characterized in that described driving circuit is made up of input resistance R, switching tube G, relay K A and contactor KM and interlock button SB2 ˊ, select button SB2, start button SB3, stop button SB4, input resistance R one end is connected with an output terminal of described A/D modular converter, the base stage of one end connecting valve pipe G, the coil tandem of relay K A is on the collector of switching tube G; Interlock button SB2 ˊ and select button SB2 link, and the button SB2 ˊ that realizes linking opens select button SB2 and to close or the button SB2 ˊ that links closes the state that select button SB2 opens; The normally opened contact of relay K A be attempted by after being connected in series with interlock button SB2 ˊ select button SB2, start button SB3 and stop button SB4 be connected in series after two ends, one normally opened contact of contactor is attempted by select button SB3 two ends, forms the output terminal V of driving circuit after contactor coil is connected in series with select button SB2, start button SB3, stop button SB4
l, this output terminal connects Oil pump electrical machinery M3 and connects the first motor and frequency converter respectively by two normally opened contacts of described contactor.
3. the control device of bearing ball contact fatigue testing machine according to claim 1, is characterized in that described first proximity switch and the second proximity switch are placed in the side of driving wheel and guide wheel respectively, for measuring the rotation number of turns of corresponding wheel.
4. the control device of bearing ball contact fatigue testing machine according to claim 2, is characterized in that the side that described force snesor is placed in described driving wheel and contacts with described bearing ball, for measuring the load added by bearing ball; Described oil pressure sensor is placed in the oil circuit of described lubricating structure, for measuring the oil pressure of oil circuit; Described vibration transducer is placed on the rotation axis of driving wheel, and for measuring driving wheel amplitude, described temperature sensor is placed in bearing ball and accompanies between examination roller, for measuring the temperature of bearing ball.
5. the control device of bearing ball contact fatigue testing machine according to claim 2, is characterized in that the rate-determining steps of described control device comprises the steps:
1) power on mode is selected, knob SB2 is selected by turn, select manually start or Auto Power On, if select manual power on mode, turn select button is to SB2, make it close, power knob SB1 on power circuit closes, and oil pump is opened, then presses control device described in start button SB3 and start working, as control device as described in making quits work, press stop button SB4; If selection Auto On Mod, turn select button SB2 ˊ, makes it close, is then undertaken by following program;
2) parameters, the input through keyboard following parameters by described computing machine: temperature pre-warning value T, vibration early warning value V, oil pressure early warning value P, working time H;
3) automatic control program is opened;
4) kind of torture test is selected;
5) gathered by force snesor and show initial load value, providing the load needing to increase or reduce, show final operating load;
6) gather coherent signal by described proximity switch and sensor, the signal of collection is changed through the A-D analog-digital of A/D modular converter, and corresponding digital signals is input to described computing machine, is handled as follows;
7) driving wheel that described in foundation two, proximity switch gathers respectively and the tach signal of guide wheel, differentiate that bearing ball has fricton-tight, as identical in both rotating speeds, fricton-tight; As both rotating speeds are not identical, there is slip, regulate guide wheel speed, make both rotating speeds identical;
8) whether arriving the analyzing and processing of setting test period, is non-fully torture test as what carry out, carries out analysiss working time judge described fatigue tester, if working time < T, described fatigue tester continues operation; If working time >=T, send alerting signal, described fatigue tester is shut down;
9) analyzing and processing of other correlation parameter:
If a. vibration signal < V, continue to gather next vibration signal; If vibration signal >=V, sends alerting signal, described fatigue tester is shut down;
If b. temperature signal < T, continue to gather next temperature signal; If temperature signal >=T, sends alerting signal, described fatigue tester is shut down;
If c. fuel injection pressure signal > P, continue to gather next fuel injection pressure signal; If fuel injection pressure signal≤P, sends alerting signal, described fatigue tester is shut down.
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| CN201010271566.XA CN101975660B (en) | 2010-09-01 | 2010-09-01 | The control device of bearing ball contact fatigue testing machine and control method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102650564B (en) * | 2012-04-19 | 2014-04-30 | 中国工程物理研究院总体工程研究所 | Method for quickly judging open loop state in vibration test and protecting device |
| CN103630361B (en) * | 2013-12-19 | 2016-06-08 | 重庆大学 | Intelligent bearing monitoring system and method thereof based on transition speed |
| CN104615041B (en) * | 2014-12-25 | 2017-02-01 | 北京航天测控技术有限公司 | Intermittent control device for overcast machine test |
| CN108627410B (en) * | 2018-04-16 | 2020-01-03 | 南通大学 | Bearing ball life testing machine |
| CN108956288B (en) * | 2018-05-21 | 2020-11-20 | 中国航发哈尔滨轴承有限公司 | A loading mechanism advancing device for material rolling contact fatigue test |
| CN112857799B (en) * | 2021-02-25 | 2023-04-14 | 湖南省水利投地方电力有限公司 | Pumped storage unit shafting vibration acquisition equipment |
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