CN104374660A - Friction wheel wear degree monitoring method - Google Patents
Friction wheel wear degree monitoring method Download PDFInfo
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- CN104374660A CN104374660A CN201410707094.6A CN201410707094A CN104374660A CN 104374660 A CN104374660 A CN 104374660A CN 201410707094 A CN201410707094 A CN 201410707094A CN 104374660 A CN104374660 A CN 104374660A
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- auxiliary wheel
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- wheel speed
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Abstract
The invention provides a wear degree monitoring method applied to a friction wheel in a friction wheel transmission conveying system. A measuring system comprises an auxiliary wheel speed measuring module, a driving wheel speed measuring module and a signal processing and transmitting module, the auxiliary wheel speed measuring module is mainly composed of an elastic wheel fork capable of rotating along with fixed axis, an auxiliary wheel, a proximity switch and the like, elastic force enables the auxiliary wheel to closely contact with the friction wheel and rotate along with the same, and realtime thickness of the friction wheel can be acquired by calculating according to a relation that linear speeds of contact points are equal; the driving wheel speed measuring module is used when an on-site control system cannot provide rotating speed parameters of the friction wheel, and a basic principle for speed measuring of the driving wheel speed measuring module is that the proximity switch is used to calculate number of pulse signals within fixed time. The signal processing and transmitting module takes a controller as a core, processes and calculates rotating speed signals of the auxiliary wheel speed measuring module and the driving wheel speed measuring module and outputs the signals by means of switch value, standard current signals and serial port signals.
Description
Technical field
The present invention relates to frictional wheel drive technical field, be specifically related to a kind of automatic monitoring method and instrument of the friction pulley degree of wear be applied on pipeline.
Background technology
Frictional wheel drive is that one utilizes two-wheeled directly to contact or two-wheeled clamping mobile platform, and compresses and produce friction force to realize the mechanical drive mode of power transmission.It is simple that it has physical construction, the little and advantage such as easy to maintenance of rotational noise, extensive in sector applications such as machinery, weaving, automobile and logistics.
The structure of friction pulley is generally the material covering the large friction factor such as leather, polyurethane or rubber outside steel wheel hub.In long-term use procedure, the thickness of friction pulley outer layer friction material reduces gradually, may occur situations such as skidding, transmission is uneven.A certain friction pulley breaks down and may cause whole production line downtime, has a strong impact on the production schedule.Therefore, Real-Time Monitoring is carried out to the friction pulley degree of wear, and it is necessary signal to be inputed to corresponding control system.
What can be used for monitoring friction pulley thickness at present is mainly non-contacting sensor, comprises capacitive displacement transducer, eddy current displacement sensor, ultrasonic displacement sensor and laser displacement sensor etc.Capacitive displacement transducer measurement range is little, large for rotary part installation difficulty; Current vortex sensor effectively can only be monitored metal material parts, cannot measure the non-metal objects such as polyurethane or rubber; Ultrasonic displacement sensor is large to short distance measuring error, and installation accuracy requires high and is subject to working environment impact; The transparency of laser displacement sensor to testee has strict demand, there is error to trnaslucent materials monitoring results such as polyurethane.
Summary of the invention
For the defect that existing non-contact displacement sensor exists for monitoring friction pulley thickness, applicant is through Improvement, a kind of indirect contact displacement monitoring method being applied to friction pulley thickness in frictional wheel drive induction system is provided, solves in current technology the above-mentioned defect existed.
Technical scheme of the present invention is as follows:
The invention provides a kind of for monitoring the friction pulley degree of wear, i.e. the measuring system of friction material thickness, is made up of auxiliary wheel speed measuring module, driving wheel speed measuring module and signal transacting transmitting module three parts.Auxiliary wheel speed measuring module and driving wheel speed measuring module be connection signal process transmitting module respectively, and signal transacting transmitting module connects the control system of embody rule object.
Auxiliary wheel speed measuring module, for measuring rotational speed in friction pulley thickness real-time change situation, is made up of casing, auxiliary wheel, auxiliary wheel fork, proximity switch, signal port, stationary shaft, spring, adjustable support, upper limit card and lower limit card.Casing is fixed on the support of site of deployment, and adjustment casing mounting hole makes auxiliary wheel and tested friction pulley close contact; Auxiliary wheel is installed on auxiliary wheel fork, and auxiliary wheel fork is connected and fixed axle, and stationary shaft connects casing; Auxiliary wheel fork is also connected with proximity switch, proximity switch for monitoring the rotating speed of auxiliary wheel, proximity switch connection signal port, signal port is fixed on casing; Spring one end is connected and fixed axle, and the other end connects auxiliary wheel fork, and spring force makes auxiliary wheel produce pressure to friction pulley direction; Auxiliary wheel fork both sides have upper limit card and lower limit card respectively, and they are all fixed on casing, for limiting the moving range of auxiliary wheel fork.
Driving wheel speed measuring module, for monitoring the rotating speed of friction pulley, is made up of contact plate, contact screw rod, sense contact, proximity switch and adjustable support.Contact plate is installed in the rotating shaft of tested friction pulley, and contact plate even circumferential distributes the screw rod of multiple protrusion, screw rod is installed metal magnetic sense contact; Proximity switch is connected with adjustable support, is installed on adjustable support one end, makes proximity switch and sense contact remain in measurable range by regulating support installing position; Adjustable support is arranged on on-the-spot fixed guide.
The major function of signal transacting transmitting module is the proximity switch signal receiving auxiliary wheel speed measuring module and driving wheel speed measuring module, carries out processing and converts the transducer signal of standard to.Signal transacting transmitting module is made up of controller, keyboard circuit, buffer circuit, display circuit, standard signal circuit, serial communication circuit, power circuit, related port and casing.Controller is the core of signal transacting, for sequential operation to received signal; Keyboard circuit connection control device I/O mouth, realizes the input of measurement parameter; The output port of auxiliary wheel speed measuring module and the proximity switch port of driving wheel speed measuring module connect buffer circuit, the I/O mouth of buffer circuit connection control device; Controller is also connected with display circuit, standard signal circuit and serial communication circuit respectively; Display circuit realizes the display of operation result; Standard signal circuit carries out controller operation result D/A conversion, is further processed as the standard signal of 4-20mA again; Serial communication circuit realizes the conversion of RS-485 signal.Power circuit is used for powering to above-mentioned each circuit, and related port realizes the input and output of signal, and all the said equipments are all installed in casing.
It is realized by the thickness of monitoring friction material that the present invention calculates friction pulley wear intensity.The auxiliary wheel in auxiliary wheel speed measuring module and the friction pulley close contact in pipeline to be ensured in actual enforcement, not produce slip.In this case, the linear velocity of friction pulley and auxiliary wheel contact point is identical, and this linear velocity is relevant with radius with the rotating speed of each wheel respectively.The radius of friction pulley can reduce gradually along with service time, and the material of auxiliary wheel suitable selection can ensure that its radius is substantially constant.Therefore, measured the rotating speed of friction pulley and auxiliary wheel by auxiliary wheel speed measuring module and driving wheel speed measuring module respectively, then signal is input to signal transacting transmitting module, just can calculate the real-time radius of friction pulley, i.e. wear intensity.
Advantageous Effects of the present invention is:
Design of the present invention is based on modular mode, and actual use can select wherein one or more modules to realize required function according to field condition, has the feature of flexible configuration.Have control system and under friction pulley rotating speed known case in site of deployment itself, only need configure auxiliary wheel speed measuring module can realize friction pulley thickness measure work; In site of deployment itself, there is control system but under friction pulley rotating speed unknown situation, auxiliary wheel speed measuring module and driving wheel speed measuring module need be configured; Needing, in on-the-spot display and networking situation, signal transacting transmitting module can be increased.
The present invention is proximity switch for realizing the main element of measurement task, and signal form is switching value pulse, has fiduciary level high, the feature that firm interference performance is strong.
Highly versatile of the present invention, does not limit by friction pulley rubbing surface material, can be used in all frictional wheel drive induction systems.
Structure of the present invention is simple, compares existing non-contact displacement transducer and has obvious cost advantage.
Accompanying drawing explanation
Fig. 1 is agent structure of the present invention and scheme of installation.
Fig. 2 is auxiliary wheel speed measuring module structural representation of the present invention.
Fig. 3 is driving wheel speed measuring module configuration diagram of the present invention.
Fig. 4 is signal transacting transmitting module principle assumption diagram.
[reference numeral explanation] 1. driven loads; 2. friction pulley; 3. friction material layer; 4. driving motor; 5. friction pulley rotating shaft; 6. hold-down nut; 7. auxiliary wheel; 8. auxiliary wheel speed measuring module casing; 9. auxiliary wheel speed measuring module mounting bracket; 10. on-the-spot fixed support; 11. contact plates; 12. contact screw rods; 13. sense contact; 14. driving wheel speed measuring module proximity switches; 15. driving wheel speed measuring module mounting brackets; 16. support fixed screws; 17. signal transacting transmitting modules; 18. signal transacting transmitting module mounting brackets; 19. auxiliary wheel sense contact; 20. auxiliary wheel forks; 21. auxiliary wheels test the speed proximity switch; 22. wheel fork hold-down nuts; 23. springs; 24. upper limit cards; 25. wheel fork stationary shaft; 26. spring fixed clips; 27. signal ports; 28. lower limit cards; 29. casing fixed bits; 30. auxiliary wheels stretch out hole; 31. input A ports; 32. input B ports; 33.RS-485 port; 34.4-20mA port; 35. warning output ports.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, the present invention includes auxiliary wheel speed measuring module 36, driving wheel speed measuring module 37 and signal transacting transmitting module 38 3 parts, it is arranged on the correct position of on-the-spot fixed support 10 respectively.The installation site of auxiliary wheel speed measuring module 36 is parallel with friction pulley 2, suitably regulates and makes auxiliary wheel 7 and friction material layer 3 close contact; The installation site of driving wheel speed measuring module 37 is positioned at the top of friction pulley 2; Signal transacting transmitting module 38 is installed and can be adjusted according to field condition, to facilitate on-the-spot display and to be connected input signal for basis, there are two generic ports signal transacting transmitting module 38 outside, input port comprises input A port 31 and input B port 32, it connects the proximity switch signal of auxiliary wheel speed measuring module 36 and driving wheel speed measuring module 37 respectively, and output port comprises RS-485 port 33,4-20mA port 34 and warning output port 35; The driving motor 4 of transmission system connects friction pulley 2, friction material layer 3 and driven loads 1 close contact, and friction pulley 2 rotates and drives driven loads 1 to move, and friction material layer 3 is passed in time and worn and torn gradually, thus causes the radius of friction pulley 2 to reduce.
See Fig. 2, auxiliary wheel speed measuring module of the present invention comprises auxiliary wheel 7, sense contact 19, assists wheel fork 20, proximity switch 21, wheel fork hold-down nut 22, spring 23, upper limit card 24, wheel fork stationary shaft 25, spring fixed clip 26, signal port 27, lower limit card 28, casing fixed bit 29, auxiliary wheel to stretch out hole 30, casing 8 and mounting bracket 9.Casing 8 is fixed on mounting bracket 9 by casing fixed bit 29, and mounting bracket 9 connects on-the-spot fixed support 10; Auxiliary wheel 7 connects assists wheel fork 20, and auxiliary wheel fork 20 connects wheel fork stationary shaft 25, and wheel fork hold-down nut 22 is for fixing auxiliary wheel fork 20, and auxiliary wheel fork 20 can wheel fork stationary shaft 25 be center of circle rotation; Upper limit card 24 and lower limit card 28 are fixed on casing 8, and its effect is that auxiliary wheel fork 20 is moved in safe range; Auxiliary wheel fork 20 is also connected with spring 23, and one end of spring 23 is stuck on auxiliary wheel fork 20, and the other end is stuck on spring fixed clip 26, and spring 23 elasticity makes auxiliary wheel fork 20 produce the power of stretching out direction, hole 30 to auxiliary wheel; Auxiliary wheel 7 one circle is provided with metal magnetic sense contact 19, and on auxiliary wheel fork 20, corresponding sense contact 19 direction is also connected with proximity switch 21, and auxiliary wheel 7 rotates and proximity switch 21 can be made to produce pulse signal, proximity switch 21 one end connection signal port 27.
See Fig. 3, driving wheel speed measuring module of the present invention is made up of hold-down nut 6, contact plate 11, contact screw rod 12, sense contact 13, proximity switch 14, mounting bracket 15 and fixed screw 16.Contact plate 11 connects friction pulley rotating shaft 5, and fixes, with friction pulley 2 synchronous axial system with hold-down nut 6; Contact plate 11 even circumferential is distributed with contact screw rod 12, and sense contact 13 is metallicl magnetic material, is connected on contact screw rod 12; Have proximity switch 14 above sense contact 13, it is fixed on one end of mounting bracket 15, and mounting bracket 15 other end is arranged on on-the-spot support 10 by fixed screw 16; Sense contact 13 contact plate 11 rotates, and proximity switch 14 produces pulse signal, the input B port 32. of the cable connection signal process transmitting module 38 of proximity switch 14 simultaneously
See Fig. 4, signal transacting transmitting module of the present invention is primarily of part compositions such as controller, keyboard circuit, signal isolation circuit, circuit, display circuit, standard signal circuit, serial communication circuit, power circuits.Input the signal port 27 that A connects auxiliary wheel speed measuring module in figure, input B connects the proximity switch signal of driving wheel speed measuring module, and two signals are input to controller after light-coupled isolation; Controller can obtain the rotating speed n of friction pulley 2 by the number of pulse in program calculation one second
mwith the rotating speed n of auxiliary wheel 7
f, because of close contact between two-wheeled, the linear velocity V of its contact point is identical, then have relational expression:
V＝2πr
mn
m＝2πr
fn
f
Wherein r
mand r
fbe respectively the radius of friction pulley 2 and the radius of auxiliary wheel 7.Auxiliary wheel 7 is as follower, and the contact of friction pulley 2 is little, and the wearing coefficient of selected materials is very high, therefore can think r
fbe a constant value, then the real-time radius of friction pulley 2 is:
Thus the wear intensity of known friction pulley 2.
See Fig. 4, the major function of keyboard circuit is the parameters such as the maximum radius of input friction pulley 2, least radius and alarm limit; Circuit is reported to the police according to the warning bound arranged, and its signal output format is switching value; Controller is calculated the signal exported and carries out the standard signal that the process such as digital-to-analog conversion, signal transmitting is transformed to 4-20mA, to meet the needs as general purpose instrument by standard signal circuit; The rs 232 serial interface signal of controller is converted to RS-485 signal conventional in industrial process by serial communication circuit, uses in order to networking; Display circuit is as man-machine interface, and the identification of process keyboard input signal and the scene of measuring-signal show.
Claims (2)
1. one kind is applied to the measuring system of friction pulley wear intensity in the induction system of frictional wheel drive, it is characterized in that: comprise auxiliary wheel speed measuring module (36), driving wheel speed measuring module (37) and signal transacting transmitting module (38) three part, the input A port (31) of signal port (27) connection signal process transmitting module (38) of auxiliary wheel speed measuring module (36), the input B port (32) of driving wheel speed measuring module proximity switch (14) connection signal process transmitting module (38), signal transacting transmitting module (38) also connects RS-485 port (33), 4-20mA port (34) and warning output port (35),
Auxiliary wheel speed measuring module (36) comprises auxiliary wheel (7), auxiliary wheel sense contact (19), auxiliary wheel fork (20), auxiliary wheel test the speed, and proximity switch (21), spring (23), wheel fork stationary shaft (25), spring fixed clip (26), upper limit card (24), lower limit card (28), casing (8) and auxiliary wheel stretch out the compositions such as hole (30), auxiliary wheel (7) circle distribution is connected with auxiliary wheel sense contact (19), auxiliary wheel (7) axle center connects auxiliary wheel fork (20), auxiliary wheel fork (20) connects auxiliary wheel and to test the speed proximity switch (21) and spring (23), the fixing card (26) of spring (23) one end linking springs, the other end is fixed on auxiliary wheel fork (20), auxiliary wheel fork (20) also connects wheel fork stationary shaft (25), wheel fork stationary shaft (25), spring fixed clip (26), upper limit card (24), lower limit card (28) and auxiliary wheel stretch out hole (30) and are all connected with casing (8),
Driving wheel speed measuring module (37) comprises the compositions such as contact plate (11), contact screw rod (12), sense contact (13), driving wheel speed measuring module proximity switch (14), driving wheel speed measuring module mounting bracket (15) and hold-down nut (6); Contact plate (11) circumference connects multiple contacts screw rod (12) respectively, contact screw rod (12) connects sense contact (13), one end of driving wheel speed measuring module mounting bracket (15) connects driving wheel speed measuring module proximity switch (14), and the other end is fixed on on-the-spot support; Contact plate (11) is connected with on-the-spot friction pulley (2), and fixes with hold-down nut (6).
2. be applied to a measuring method for friction pulley wear intensity in the induction system of frictional wheel drive, it is characterized in that:
1) use indirect contact mode, change friction pulley thickness or displacement monitoring into rotation speed monitoring, then calculate the real-time thickness changing value of friction pulley according to linear velocity invariance principle;
2) use and there is flexible wheel fork connect auxiliary wheel contact with on-the-spot friction pulley, after the reduction of guarantee friction pulley radius still can with auxiliary wheel close contact, thus linear velocity permanence condition is set up always;
3) in the system can not knowing friction pulley rotating speed, use the mode of contact plate to arrange sense contact, and sense contact is metallicl magnetic material, can directly be fixed on friction pulley wheel hub by sense contact by magnetic force when mounting condition allows;
4) whole measuring system comprises auxiliary wheel speed measuring module, driving wheel speed measuring module and signal transacting transmitting module three part, and the contact of each several part mutual is separate again, can according to fielded system situation reasonable selection;
5) signal transacting transmitting module includes the current signal of standard, switching signal and rs 232 serial interface signal port, meets general purpose instrument request for utilization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707094.6A CN104374660B (en) | 2014-11-27 | 2014-11-27 | Friction wheel wear degree monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707094.6A CN104374660B (en) | 2014-11-27 | 2014-11-27 | Friction wheel wear degree monitoring method |
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| Publication Number | Publication Date |
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| CN104374660A true CN104374660A (en) | 2015-02-25 |
| CN104374660B CN104374660B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410707094.6A Expired - Fee Related CN104374660B (en) | 2014-11-27 | 2014-11-27 | Friction wheel wear degree monitoring method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644936A (en) * | 2016-12-02 | 2017-05-10 | 广州日滨科技发展有限公司 | Elevator sliding guide shoe liner testing machine |
| CN107328376A (en) * | 2017-07-19 | 2017-11-07 | 天奇自动化工程股份有限公司 | Friction drive device with pressure sensor |
| CN109297729A (en) * | 2018-11-22 | 2019-02-01 | 开平市新丽华电子有限公司 | A kind of resistance to system safety testing device of wheel |
Citations (4)
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|---|---|---|---|---|
| US4196611A (en) * | 1978-05-22 | 1980-04-08 | Shigeru Suga | Testing apparatus for determining abrasion resistance of a surface |
| DE19734388C1 (en) * | 1997-08-08 | 1998-11-12 | Univ Magdeburg Tech | Friction and wear testing device |
| CN203648925U (en) * | 2013-11-18 | 2014-06-18 | 铜陵科达车辆装备有限责任公司 | Non-contact pinch roller detection mechanism for wheel set gear box oil washing machine for railway bullet train |
| CN204330513U (en) * | 2014-11-27 | 2015-05-13 | 江南大学 | A kind of friction pulley wear intensity monitoring system |
-
2014
- 2014-11-27 CN CN201410707094.6A patent/CN104374660B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196611A (en) * | 1978-05-22 | 1980-04-08 | Shigeru Suga | Testing apparatus for determining abrasion resistance of a surface |
| DE19734388C1 (en) * | 1997-08-08 | 1998-11-12 | Univ Magdeburg Tech | Friction and wear testing device |
| CN203648925U (en) * | 2013-11-18 | 2014-06-18 | 铜陵科达车辆装备有限责任公司 | Non-contact pinch roller detection mechanism for wheel set gear box oil washing machine for railway bullet train |
| CN204330513U (en) * | 2014-11-27 | 2015-05-13 | 江南大学 | A kind of friction pulley wear intensity monitoring system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644936A (en) * | 2016-12-02 | 2017-05-10 | 广州日滨科技发展有限公司 | Elevator sliding guide shoe liner testing machine |
| CN107328376A (en) * | 2017-07-19 | 2017-11-07 | 天奇自动化工程股份有限公司 | Friction drive device with pressure sensor |
| CN109297729A (en) * | 2018-11-22 | 2019-02-01 | 开平市新丽华电子有限公司 | A kind of resistance to system safety testing device of wheel |
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| CN104374660B (en) | 2017-02-22 |
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