CN103728343B - The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease - Google Patents
The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease Download PDFInfo
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- CN103728343B CN103728343B CN201410018052.1A CN201410018052A CN103728343B CN 103728343 B CN103728343 B CN 103728343B CN 201410018052 A CN201410018052 A CN 201410018052A CN 103728343 B CN103728343 B CN 103728343B
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Abstract
The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease, online test method utilizes a kind of railway grease on-line measuring device, realize the automatic sampling of solid lubrication fat, the content of iron filings in railway grease is determined in the magnetic test coil inductance value change utilizing iron filings abrasive particle in railway grease to cause, then the degree of wear in pivoting support raceway is effectively judged, and the early warning value of real-time detected value and setting is compared, judging whether railway grease lost efficacy, providing reference for optimizing raceway lubricating condition.The present invention not only fundamentally solves solid lubrication fat and can not to flow the on-line sampling difficulty brought, and realize on-line checkingi, the problem that avoids that the analytical cycle that offline inspection exists is long, testing process is complicated etc., and to assessment pivoting support running status, improve lubricating condition, the serviceable life and the raising operational reliability that effectively extend pivoting support are significant.The method is simply easy to realize and automaticity is high.
Description
Technical field
The present invention relates to pivoting support railway grease on-line checkingi field, particularly the online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease.
Background technology
Pivoting support needs between two articles to do relative gyration, need again to bear axis simultaneously, radial load and upsetting moment and low-speed heave-load, the necessary important drive disk assembly of machinery that work condition environment is extremely severe, be widely used in ship equipment, aerogenerator, ocean platform, the field such as crane and industrial machinery, be called as in " joint of machine ", but once lack of lubrication will cause complete machine to lose efficacy, even there is significant trouble, cause maintenance difficulty large, cycle is long, the costly long economic loss caused with stop time, have a strong impact on the serviceable life of pivoting support.
Wearing and tearing, corrosion and fracture are three principal modes of abuse and inefficacy, according to statistics, wherein the mechanical fault of nearly 80% caused owing to wearing and tearing, almost the bearing failure of 40% produces because of faulty lubrication, and the iron filings abrasive particle in railway grease is the principal element causing wearing and tearing.For pivoting support, raceway wearing and tearing are particularly evident, and long running to cause in railway grease the miserable assorted booty such as sand and dust, iron filings and deterioration occurs go bad, thus causes raceway to peel off and fatigue wear, also can produce pit time serious; The bad working environments of pivoting support can make the very fast corrosion of ball and raceway simultaneously, because of the wearing and tearing of lack of lubrication aggravation raceway, reduces the serviceable life of pivoting support.Therefore, the scrap iron content in on-line checkingi railway grease, and determine whether railway grease lost efficacy according to the early warning value arranged, raceway lubricating condition can be optimized, effectively extend the serviceable life of pivoting support.
At present, the research of domestic railway grease detection technique mainly concentrates on the methods such as spectral analysis, analyzing iron spectrum, grain count, and all belong to off-line type detection, although off-line type accuracy of detection is high, result is accurate, but have that reaction velocity is slow, analytical cycle is long, sampling requirement is strict and the shortcoming such as testing process is complicated, mostly just be suitable for lab analysis use, cannot Real-Time Monitoring be carried out.Along with modern machinery and equipment just day by day to large-scale, at a high speed, automation direction development, offline inspection far can not meet equipment long period requirements of one's work, on-line checkingi becomes the important development trend that current device lubricated sliding wear detects gradually thus, and existing railway grease on-line checkingi rests on theoretical and laboratory study stage substantially, minority detection technique does not still break away from off-line analysis mode, cause it to detect real-time and be subject to a definite limitation, therefore the on-line checkingi of railway grease becomes the research field of a urgently active development.
In view of the above, the online test method of scrap iron content in a kind of pivoting support railway grease must be moused out, railway grease on-line measuring device is utilized to realize the automatic sampling of railway grease, cause winding inductance quantity to change the content judging iron filings in railway grease according to iron filings in sampling railway grease, and the early warning value of the inductance difference detected in real time and setting is compared, judge whether railway grease lost efficacy, optimize raceway lubricating condition, limits can extend serviceable life of pivoting support, improve operational reliability.
Summary of the invention
In order to solve the defect existed in the above-mentioned existing railway grease detection technique mentioned, the present invention proposes online test method and the railway grease on-line measuring device thereof of scrap iron content in a kind of pivoting support railway grease, railway grease on-line measuring device is utilized to realize the automatic sampling of railway grease, cause winding inductance quantity to change the content judging iron filings in railway grease according to iron filings in sampling railway grease, and then judge the degree of wear in pivoting support raceway.The early warning value of the inductance difference detected in real time and setting is compared, judges whether railway grease lost efficacy.
The technical solution used in the present invention is:
The online test method of scrap iron content in a kind of pivoting support railway grease, it is characterized in that: the automatic sampling of described method for utilizing the railway grease on-line measuring device described in claim 3 to realize railway grease, winding inductance quantity is caused to change the content determining iron filings in railway grease according to iron filings in sampling railway grease, inductance value change greatly, illustrate that the scrap iron content in railway grease is more, thus effectively judge the degree of wear in pivoting support operational process in raceway.
Described method also comprises and being compared by the early warning value of the inductance difference detected in real time and setting, judge whether railway grease lost efficacy: when the inductance difference detected in real time is less than the early warning value of setting, railway grease is transmitted back in pivoting support by path 10 by starter motor 1, otherwise then represents that inefficacy is reported to the police.
The present invention also provides a kind of railway grease on-line measuring device, and comprise motor 1, shaft coupling 2, miniature large pitch screw rod 3, nut seat 4, magnet steel 5, shell 6, magnetic test coil 7 and reference coil 8, pivoting support is by inner ring 9, path 10, ball 11 and outer ring 12; Described railway grease on-line measuring device is fixed on pivoting support inner ring 9 by the screw thread 13 of shell 6, motor 1 is connected by shaft coupling 2 with miniature large pitch screw rod 3, nut seat 4 is arranged on miniature large pitch screw rod 3, nut seat 4 is equivalent to piston, when motor 1 is with actuating miniature large pitch screw rod 3 to rotate, nut seat 4 movement fast, makes to form low pressure in magnet steel 5 chamber, is drawn in magnet steel 5 chamber by the railway grease in raceway groove between pivoting support inner ring 9 and outer ring 12 by path 10; After railway grease has detected, motor 1 has reversed, and railway grease, toward reverse direction motion, to push back between inner ring 9 and outer ring 12 in raceway groove by nut seat 4.
Described magnetic test coil 7 is wrapped on magnet steel 5, iron filings in railway grease in inductive magnetic steel 5 chamber, reference coil 8 is independent fixing, magnetic test coil 7 and reference coil 8 are connected into differential form, and magnetic test coil 7 keeps identical with the initial inductance value of reference coil 8, when railway grease is by magnetic test coil 7, iron filings cause the inductance value of magnetic test coil 7 to increase, like this, magnetic test coil 7 and reference coil 8 can produce difference in inductance, thus detect the scrap iron content in railway grease.
Described railway grease on-line measuring device also comprises testing circuit, described testing circuit comprises the detection electric bridge, ac amplifier circuit, rectification circuit, DC amplification circuit, low-pass filter circuit, the peak holding circuit that connect successively, detection electric bridge comprises two brachium pontis in parallel, and a brachium pontis comprises the magnetic test coil L be sequentially connected in series
1with reference coil L
2, another brachium pontis comprises the first resistance R be sequentially connected in series
1with the second resistance R
2, two brachium pontis are all connected with the driving source of outside, the sinusoidal signal of pumping signal to be frequency be 0 ~ 1KHz, magnetic test coil L
1, reference coil L
2the first common port a and the first resistance R
1, the second resistance R
2the second common port b between output detections signal; Ac amplifier circuit is by the first operational amplifier A 1, first electric capacity C
1with the second electric capacity C
2, the 3rd resistance R
3, the 4th resistance R
4with the 5th resistance R
5composition; Rectification circuit is by the second operational amplifier A 2, the 3rd operational amplifier A 3, first diode D
1, the second diode D
2, the 6th resistance R
6, the 7th resistance R
7, the 8th resistance R
8with the 9th resistance R
9composition; DC amplification circuit is by four-operational amplifier A4, the first potentiometer W
1, the second potentiometer W
2, the tenth resistance R
10composition; Low-pass filter circuit is by the 5th operational amplifier A the 5, the 11 resistance R
11with the 12 resistance R
12, the 3rd electric capacity C
3with the 4th electric capacity C
4composition; Peak holding circuit forms primarily of the capacitance resistance of sampling holder LF398, voltage comparator LM311 and periphery.
When railway grease is by magnetic test coil L
1time, the iron filings abrasive particle in railway grease causes magnetic test coil L
1inductance value increase, thus make magnetic test coil L
1with reference coil L
2produce difference in inductance, causing detecting electric bridge exports uneven, the detection signal detecting electric bridge output carries out signal amplification through ac amplifier circuit, rectification circuit changes the AC signal of amplification into pulsating direct current signal, then again signal amplification is carried out through DC amplification circuit, by low-pass filter circuit filtering high-frequency signal, then keep through the sampling that peak holding circuit carries out signal peak, eventually pass analog to digital converter and convert digital signal to and carry out relevant treatment and data of obtaining a result to single-chip microcomputer.
The invention has the beneficial effects as follows:
The present invention designs a kind of railway grease on-line measuring device, realize the automatic sampling of solid lubrication fat, and can the content of iron filings in on-line checkingi railway grease, and then effective degree of wear judged in pivoting support operational process in raceway, to assessment pivoting support running status, improve lubricating condition, the serviceable life and the raising operational reliability that effectively extend pivoting support are significant.
The present invention not only fundamentally solves solid lubrication fat and can not to flow the on-line sampling difficulty brought, and realize on-line checkingi, the problem that avoids that the analytical cycle that offline inspection exists is long, testing process is complicated etc., the method is simply easy to realize and automaticity is high, has good application and popularization value.
Accompanying drawing explanation
Fig. 1 is pivoting support railway grease on-line detecting system schematic diagram of the present invention.
Fig. 2 is one of pivoting support testing circuit schematic diagram of the present invention.
Fig. 3 is pivoting support testing circuit schematic diagram two of the present invention.
In figure, 1 is motor, and 2 is shaft coupling, and 3 is miniature large pitch screw rod, and 4 is nut seat, and 5 is magnet steel, and 6 is shell, and 7 is magnetic test coil, and 8 is reference coil, and 9 is pivoting support inner ring, and 10 is lubrication channel, and 11 is ball, and 12 is pivoting support outer ring, and 13 is screw thread.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
The online test method of scrap iron content in a kind of pivoting support railway grease, it is characterized in that: the automatic sampling of described method for utilizing the railway grease on-line measuring device described in claim 3 to realize railway grease, winding inductance quantity is caused to change the content determining iron filings in railway grease according to iron filings in sampling railway grease, inductance value change greatly, illustrate that the scrap iron content in railway grease is more, thus effectively judge the degree of wear in pivoting support operational process in raceway.
Described method also comprises and being compared by the early warning value of the inductance difference detected in real time and setting, judge whether railway grease lost efficacy: when the inductance difference detected in real time is less than the early warning value of setting, railway grease is transmitted back in pivoting support by path 10 by starter motor 1, otherwise then represents that inefficacy is reported to the police.
The present invention also provides a kind of railway grease on-line measuring device, and comprise motor 1, shaft coupling 2, miniature large pitch screw rod 3, nut seat 4, magnet steel 5, shell 6, magnetic test coil 7 and reference coil 8, pivoting support is by inner ring 9, path 10, ball 11 and outer ring 12; Described railway grease on-line measuring device is fixed on pivoting support inner ring 9 by the screw thread 13 of shell 6, motor 1 is connected by shaft coupling 2 with miniature large pitch screw rod 3, nut seat 4 is arranged on miniature large pitch screw rod 3, nut seat 4 is equivalent to piston, when motor 1 is with actuating miniature large pitch screw rod 3 to rotate, nut seat 4 movement fast, makes to form low pressure in magnet steel 5 chamber, is drawn in magnet steel 5 chamber by the railway grease in raceway groove between pivoting support inner ring 9 and outer ring 12 by path 10; After railway grease has detected, motor 1 has reversed, and railway grease, toward reverse direction motion, to push back between inner ring 9 and outer ring 12 in raceway groove by nut seat 4.
Described magnetic test coil 7 is wrapped on magnet steel 5, iron filings in railway grease in inductive magnetic steel 5 chamber, reference coil 8 is independent fixing, magnetic test coil 7 and reference coil 8 are connected into differential form, and magnetic test coil 7 keeps identical with the initial inductance value of reference coil 8, when railway grease is by magnetic test coil 7, iron filings cause the inductance value of magnetic test coil 7 to increase, like this, magnetic test coil 7 and reference coil 8 can produce difference in inductance, thus detect the scrap iron content in railway grease.
Described railway grease on-line measuring device also comprises testing circuit, described testing circuit comprises the detection electric bridge, ac amplifier circuit, rectification circuit, DC amplification circuit, low-pass filter circuit, the peak holding circuit that connect successively, detection electric bridge comprises two brachium pontis in parallel, and a brachium pontis comprises the magnetic test coil L be sequentially connected in series
1with reference coil L
2, another brachium pontis comprises the first resistance R be sequentially connected in series
1with the second resistance R
2, two brachium pontis are all connected with the driving source of outside, the sinusoidal signal of pumping signal to be frequency be 0 ~ 1KHz, magnetic test coil L
1, reference coil L
2the first common port a and the first resistance R
1, the second resistance R
2the second common port b between output detections signal; Ac amplifier circuit is by the first operational amplifier A 1, first electric capacity C
1with the second electric capacity C
2, the 3rd resistance R
3, the 4th resistance R
4with the 5th resistance R
5composition; Rectification circuit is by the second operational amplifier A 2, the 3rd operational amplifier A 3, first diode D
1, the second diode D
2, the 6th resistance R
6, the 7th resistance R
7, the 8th resistance R
8with the 9th resistance R
9composition; DC amplification circuit is by four-operational amplifier A4, the first potentiometer W
1, the second potentiometer W
2, the tenth resistance R
10composition; Low-pass filter circuit is by the 5th operational amplifier A the 5, the 11 resistance R
11with the 12 resistance R
12, the 3rd electric capacity C
3with the 4th electric capacity C
4composition; Peak holding circuit forms primarily of the capacitance resistance of sampling holder LF398, voltage comparator LM311 and periphery.
When railway grease is by magnetic test coil L
1time, the iron filings abrasive particle in railway grease causes magnetic test coil L
1inductance value increase, thus make magnetic test coil L
1with reference coil L
2produce difference in inductance, causing detecting electric bridge exports uneven, the detection signal detecting electric bridge output carries out signal amplification through ac amplifier circuit, rectification circuit changes the AC signal of amplification into pulsating direct current signal, then again signal amplification is carried out through DC amplification circuit, by low-pass filter circuit filtering high-frequency signal, then keep through the sampling that peak holding circuit carries out signal peak, eventually pass analog to digital converter and convert digital signal to and carry out relevant treatment and data of obtaining a result to single-chip microcomputer.
The present invention utilizes railway grease on-line measuring device to realize the on-line sampling of solid lubrication fat, the content of iron filings in on-line checkingi railway grease, judge the degree of wear in pivoting support raceway, optimize raceway lubricating condition, and compare with the early warning value of setting according to real-time detected value, judge whether railway grease lost efficacy.
As shown in Figure 1, railway grease on-line measuring device comprises motor 1, shaft coupling 2, miniature large pitch screw rod 3) nut seat 4, magnet steel 5, shell 6, magnetic test coil 7, reference coil 8 form, and pivoting support is made up of inner ring 9, path 10, ball 11 and outer ring 12.Railway grease on-line measuring device is fixed on pivoting support inner ring 9 by the screw thread 13 of shell 6, motor 1 is connected by shaft coupling 2 with miniature large pitch screw rod 3, nut seat 4 is arranged on miniature large pitch screw rod 3, magnetic test coil 7 is wrapped on magnet steel 5, iron filings in railway grease in inductive magnetic steel 5 chamber, reference coil 8 is independent fixing, and magnetic test coil 7 and reference coil 8 are connected into differential form, and magnetic test coil 7 keeps identical with the initial inductance value of reference coil 8.
After pivoting support runs a period of time, may wear and tear, cause the change even inefficacy of railway grease of scrap iron content in railway grease, when needs detect railway grease, starter motor 1 rotates forward, actuating miniature large pitch screw rod 3 is with to rotate by shaft coupling 2, now, nut seat 4 is equivalent to piston, is moved to the left fast, make to form low pressure in magnet steel 5 chamber, the railway grease in raceway groove between pivoting support inner ring 9 and outer ring 12 is drawn in magnet steel 5 chamber by path 10.If when not having tested railway grease sample (or in tested railway grease sample, scrap iron content is zero) by magnetic test coil 7, magnetic test coil 7 is identical with the inductance value of reference coil 8, two coils export equal, and namely outputing signal difference is zero, during as tested railway grease sample is passed through magnetic test coil 7, owing to there is iron filings abrasive particle in tested railway grease sample, this just makes the inductance value of magnetic test coil 7 larger than the inductance value of reference coil 8, thus cause the output of two coils uneven, thus make the output signal between magnetic test coil 7 and reference coil 8 produce difference, by amplifying this output signal, rectification, filtering, sampling maintenance waits signal transacting, the content of iron filings abrasive particle in tested railway grease sample can be calculated, namely the inductance value of the magnetic test coil that iron filings abrasive particle causes in railway grease is utilized to change the content determining iron filings in tested railway grease, inductance value change greatly in explanation railway grease the content of iron filings more, the variation relation between inductance value change and scrap iron content is obtained by the method for many experiments data fitting function.After railway grease has detected, the early warning value of the inductance difference detected in real time and setting is compared, if when the inductance difference detected in real time is less than the early warning value of setting, starter motor 1 reverses, nut seat 4 moves right fast, railway grease is pushed back between inner ring 9 and outer ring 12 in raceway groove, otherwise then represent that railway grease inefficacy is reported to the police.
As shown in accompanying drawing 2, Fig. 3, testing circuit of the present invention mainly comprises detection electric bridge, ac amplifier circuit, rectification circuit, DC amplification circuit, low-pass filter circuit, peak holding circuit.
Detect the inductance bridge that electric bridge is a non-equilibrium state, detection electric bridge comprises two brachium pontis in parallel, and a brachium pontis comprises the magnetic test coil L be sequentially connected in series
1with reference coil L
2, another brachium pontis comprises the resistance R be sequentially connected in series
1with resistance R
2, two brachium pontis are all connected with the driving source of outside, the sinusoidal signal of pumping signal to be frequency be 0 ~ 1KHz, magnetic test coil L
1, reference coil L
2common port a and resistance R
1, resistance R
2common port b output detections signal.
Ac amplifier circuit is made up of operational amplifier A 1 and peripheral capacitance resistance, and the output terminal a of detection signal is by electric capacity C
1be connected with the in-phase input end of operational amplifier A 1, the output terminal b of detection signal is by resistance R
3be connected with the inverting input of operational amplifier A 1, between the inverting input of operational amplifier A 1 and its output terminal, be in series with resistance R
5, the output terminal of operational amplifier A 1 is connected with electric capacity C
2carry out signal filtering.
Rectification circuit is made up of operational amplifier A 2, operational amplifier A 3, diode and resistance, the in-phase input end of the output signal input operational amplifier A2 of ac amplifier circuit 3, the inverting input of operational amplifier A 2 is resistance R with a road of connecting between its output terminal
7, diode D
1, another road is diode D
2, diode D
1negative pole and diode D
2positive pole be connected with the output terminal of operational amplifier A 2, diode D
1positive pole by resistance R
8be connected with the inverting input of operational amplifier A 3, the in-phase input end feedback signal of operational amplifier A 2, to the in-phase input end of operational amplifier A 3, is in series with resistance R between the inverting input of operational amplifier A 3 and its output terminal
9, pass through build-out resistor
ensure that output signal polarity is just, the AC signal after amplifying is converted to pulsating direct current signal.
DC amplification circuit is made up of operational amplifier A 4, peripheral resistance and potentiometer, the in-phase input end of the output signal input operational amplifier A4 of rectification circuit, the inverting input of operational amplifier A 4 and potentiometer W
2sliding end connect, pin 1 and the pin 5 of operational amplifier A 4 are in series with potentiometer W
1, pin 4 and potentiometer W
1sliding end connect, like this form zeroing compensating circuit can guarantee that the output valve of circuit does not offset, by regulator potentiometer W
2, the enlargement factor of DC amplification circuit can be made at 1 ~ 101 continuously adjustabe.
Low-pass filter circuit is made up of operational amplifier A 5 and peripheral capacitance resistance, and the output signal of DC amplification circuit is by resistance R
11with resistance R
12be connected with the in-phase input end of operational amplifier A 5, resistance R
11with resistance R
12common port and the inverting input of operational amplifier A 5 be in series with electric capacity C
3, the inverting input feedback signal of operational amplifier A 5 to output terminal, by selecting corresponding cutoff frequency, the high-frequency signal in filtering rectification output ripple direct current signal.
Peak holding circuit is primarily of sampling holder LF398, voltage comparator LM311 and peripheral capacitance resistance composition, the output signal of low-pass filter circuit is compared by voltage comparator LM311 with the output signal of sampling holder LF398, when output signal higher than sampling holder LF398 of the output signal of low-pass filter circuit, the logic control end of sampling holder LF398 is high level, sampling holder LF398 is made to be in sample states, when the output signal of low-pass filter circuit reaches peak value and declines, the logic control end of sampling holder LF398 is low level, sampling holder LF398 is made to be in hold mode, thus achieve magnetic test coil L
1with reference coil L
2the sampling of the positive peak signal of the detection signal exported keeps.
In the present embodiment, positive peak signal is converted to digital signal and carries out relevant treatment and data of obtaining a result to single-chip microcomputer by analog to digital converter.
Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design concept prerequisite of the present invention; the various modification that in this area, common engineering technical personnel make technical scheme of the present invention and improvement; all should fall into protection scope of the present invention, the technology contents of request protection of the present invention is all recorded in detail in the claims.
Claims (2)
1. a railway grease on-line measuring device, it is characterized in that comprising motor (1), shaft coupling (2), miniature large pitch screw rod (3), nut seat (4), magnet steel (5), shell, magnetic test coil (7) and reference coil (8), pivoting support is made up of inner ring (9), passage (10), ball (11) and outer ring (12), described railway grease on-line measuring device is fixed on pivoting support inner ring (9) by the screw thread (13) of shell, motor (1) is connected by shaft coupling (2) with miniature large pitch screw rod (3), nut seat (4) is arranged on miniature large pitch screw rod (3), nut seat (4) is equivalent to piston, when motor (1) band actuating miniature large pitch screw rod (3) rotates, nut seat (4) movement fast, make to form low pressure in magnet steel (5) chamber, railway grease in raceway groove between pivoting support inner ring (9) and outer ring (12) is drawn in magnet steel (5) chamber by passage (10), after railway grease has detected, motor (1) has reversed, and railway grease, toward reverse direction motion, to push back between inner ring (9) and outer ring (12) in raceway groove by nut seat (4), described magnetic test coil (7) is wrapped on magnet steel (5), iron filings in railway grease in inductive magnetic steel (5) chamber, reference coil (8) is independent fixing, magnetic test coil (7) and reference coil (8) are connected into differential form, magnetic test coil (7) keeps identical with the initial inductance value of reference coil (8), when railway grease is by magnetic test coil (7), iron filings cause the inductance value of magnetic test coil (7) to increase, like this, magnetic test coil (7) and reference coil (8) can produce difference in inductance, thus detect the scrap iron content in railway grease, described railway grease on-line measuring device also comprises testing circuit, described testing circuit comprises the detection electric bridge, ac amplifier circuit, rectification circuit, DC amplification circuit, low-pass filter circuit, the peak holding circuit that connect successively, detection electric bridge comprises two brachium pontis in parallel, and a brachium pontis comprises the magnetic test coil (L be sequentially connected in series
1) and reference coil (L
2), another brachium pontis comprises the first resistance (R be sequentially connected in series
1) and the second resistance (R
2), two brachium pontis are all connected with the driving source of outside, the sinusoidal signal of pumping signal to be frequency be 0 ~ 1KHz, magnetic test coil (L
1), reference coil (L
2) the first common port (a) and the first resistance (R
1), the second resistance (R
2) the second common port (b) between output detections signal, ac amplifier circuit is by the first operational amplifier (A1), the first electric capacity (C
1) and the second electric capacity (C
2), the 3rd resistance (R
3), the 4th resistance (R
4) and the 5th resistance (R
5) composition, rectification circuit is by the second operational amplifier (A2), the 3rd operational amplifier (A3), the first diode (D
1), the second diode (D
2), the 6th resistance (R
6), the 7th resistance (R
7), the 8th resistance (R
8) and the 9th resistance (R
9) composition, DC amplification circuit is by four-operational amplifier (A4), the first potentiometer (W
1), the second potentiometer (W
2), the tenth resistance (R
10) composition, low-pass filter circuit is by the 5th operational amplifier (A5), the 11 resistance (R
11) and the 12 resistance (R
12), the 3rd electric capacity (C
3) and the 4th electric capacity (C
4) composition, peak holding circuit is primarily of the capacitance resistance composition of sampling holder (LF398), voltage comparator (LM311) and periphery.
2. the online test method of scrap iron content in a pivoting support railway grease, it is characterized in that: the automatic sampling of described method for utilizing the railway grease on-line measuring device described in claim 1 to realize railway grease, winding inductance quantity is caused to change the content determining iron filings in railway grease according to iron filings in sampling railway grease, inductance value change greatly, illustrate that the scrap iron content in railway grease is more, thus effectively judge the degree of wear in pivoting support operational process in raceway; Described method also comprises and being compared by the early warning value of the inductance difference detected in real time and setting, judge whether railway grease lost efficacy: when the inductance difference detected in real time is less than the early warning value of setting, railway grease is transmitted back in pivoting support, otherwise then represents that inefficacy is reported to the police.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018052.1A CN103728343B (en) | 2014-01-15 | 2014-01-15 | The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018052.1A CN103728343B (en) | 2014-01-15 | 2014-01-15 | The online test method of scrap iron content and railway grease on-line measuring device thereof in a kind of pivoting support railway grease |
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| CN103728343B true CN103728343B (en) | 2016-04-20 |
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