CN103743332B - A kind of large-sized grinder main bearing oil film thickness monitoring device - Google Patents
A kind of large-sized grinder main bearing oil film thickness monitoring device Download PDFInfo
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- CN103743332B CN103743332B CN201410001259.8A CN201410001259A CN103743332B CN 103743332 B CN103743332 B CN 103743332B CN 201410001259 A CN201410001259 A CN 201410001259A CN 103743332 B CN103743332 B CN 103743332B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 22
- 239000003921 oil Substances 0.000 claims abstract description 65
- 238000006073 displacement reaction Methods 0.000 claims abstract description 58
- 241001275902 Parabramis pekinensis Species 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims abstract description 4
- 230000009191 jumping Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000005461 lubrication Methods 0.000 claims description 9
- 230000000977 initiatory effect Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 239000010687 lubricating oil Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 231100000241 scar Toxicity 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000010721 machine oil Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
A kind of large-sized grinder main bearing oil film thickness monitoring device relating to grinding machine oil film thickness monitoring technical field, described device comprises eddy current displacement sensor, sensor stand and bracket base, eddy current displacement sensor is arranged on one end of sensor stand, the other end of sensor stand is fixed on the bracket base of base bearing spherical bush body bottom, this bracket base and sensor stand in mill body by adjustment bolt and packing ring can be with spherical bush body automatic aligning；Quill shaft in the induction end correspondence mill body of eddy current displacement sensor, eddy current displacement sensor can be by adjusting the entrance linear operating region, position of sensor stand；Described device can the oil film thickness of monitoring mill trunnion and brasses of real-time online, thus provide guarantee reliably for the properly functioning of grinding machine.
Description
[technical field]
The present invention relates to grinding machine oil film thickness monitoring technical field, especially relate to the monitoring device of the base bearing oil film thickness real-time online of a kind of large-scale mine grinding machine.
[background technology]
Known, the base bearing of grinding machine is that it uses sliding bearing more for supporting the critical component that grinding machine rotates, and utilize the lubricating oil that lubrication station pumps out, between bearing shell and quill shaft, form oil film, thus avoid directly contacting between bearing shell and quill shaft, it is ensured that grinding machine properly functioning；Nowadays, the grinder main bearing of relatively small dimension uses dynamic and hydrostatic bearing and joins babbitt metal bearing, it utilizes lubrication station hydraulic oil by grinding machine jack-up before and after grinding machine starts and stops, continuous low pressure is used to drench oil lubrication at grinding machine run duration, thus form the dynamic pressure oil film of 0.10～0.15mm thickness, and large-sized grinder is bigger due to load, base bearing many employings static-pressure sliding bearing joins copper alloy watt, it starts at grinding machine, run duration utilizes the hydraulic oil of lubrication station to be floated by grinding machine, thus forms the oil film of 0.15～0.25mm thickness；In actual applications, if oil film thickness is too small, the most then can cause the damage of base bearing tile kilning, even quill shaft, heavy then also result in grinding machine, the paralysis in the most whole ore dressing plant；But, now for the judgement of grinding machine oil film thickness, main still by the oil pressure in base bearing petrol station and the lubrication circumstances of flow indirect feedback, and depend on on-the-spot artificial use amesdial measurement oil film thickness, owing to this judgment mode not only error is big, but also round-the-clock continual monitoring cannot be accomplished, i.e. it can not find fault in time and process in time, therefore, a kind of monitoring device of grinder main bearing oil film thickness real-time online that can be applied to it is badly in need of at present to meet the safe handling requirement of large-sized grinder main bearing.
[summary of the invention]
In order to overcome the deficiency in background technology, the invention discloses a kind of large-sized grinder main bearing oil film thickness monitoring device, described device can the oil film thickness of monitoring mill trunnion and brasses of real-time online, thus provide guarantee reliably for the properly functioning of grinding machine.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of large-sized grinder main bearing oil film thickness monitoring device, described device comprises eddy current displacement sensor, sensor stand and bracket base；Described eddy current displacement sensor is arranged on one end of sensor stand, the other end of sensor stand is held within mill body on the bracket base of base bearing spherical bush body bottom by adjusting bolt and packing ring, and this bracket base and sensor stand can be with spherical bush body automatic alignings；Quill shaft in the induction end correspondence mill body of described eddy current displacement sensor, eddy current displacement sensor can be by adjusting the entrance linear operating region, position of sensor stand, and eddy current displacement sensor connects and has the signal for being gathered to carry out processing and inputting signal processing and the control system of grinding machine PLC；It is dolioform linear contact lay between spherical bush body and bearing block in described mill body, spherical bush body is fixedly connected with the pressing plate for limiting base bearing brasses and spherical bush body radial displacement, and what base bearing brasses was provided with turn up, and flange can limit the axial displacement of spherical bush body.
Described large-sized grinder main bearing oil film thickness monitoring device, in described mill body, the free end of base bearing holds correspondence to be respectively provided with a spherical bush body with fixing, two spherical bush bodies are fixedly connected with sensor stand by bracket base and adjustment bolt respectively, and the outside screw hole of the sensor stand of correspondence base bearing free end is provided with an eddy current displacement sensor, the inside thread hole of another sensor stand that corresponding base bearing fixes end is provided with another eddy current displacement sensor.
Described large-sized grinder main bearing oil film thickness monitoring device, described device is when application, first will put into the adjustment pad of respective thickness between corresponding to sensor stand and the bracket base position contacted, then adjustment bolt is tightened, zero clearance will be adjusted between eddy current displacement sensor and mill body quill shaft again, now, unclamp adjustment bolt, remove adjustment pad, so that forming and adjust the spacing of pad consistency of thickness between eddy current displacement sensor and quill shaft.
Described large-sized grinder main bearing oil film thickness monitoring device, the end face of described quill shaft correspondence eddy current displacement sensor requires to have scar, aperture or crack, and roughness is at least up to 3.2 m, and run-out tolerance is within 0.05mm.
Described large-sized grinder main bearing oil film thickness monitoring device, described eddy current displacement sensor is selected and is measured the range of linearity properly, highly sensitive, the non-contact measurement sensor that capacity of resisting disturbance is affected by lubricating oil by force and not.
Described large-sized grinder main bearing oil film thickness monitoring device, described eddy current displacement sensor is powered by isolation distributor, its signal gathered enters the analog module in the main PLC of mill body by isolation distributor output 4～20mA signal, by central processing unit CPU, signal is processed, simultaneously, switch board door is provided with man-machine touch screen interface, this interface is by network and CPU communication, and the signal of base bearing oil film thickness after treatment is shown, realize the real time on-line monitoring of base bearing oil film thickness at mill body run duration with this.
Described large-sized grinder main bearing oil film thickness monitoring device, described device is after main bearing lubrication station starts, eddy current displacement sensor measure in real time mill body static time oil film thickness, when oil film thickness is more than initiation value, mill body starts, and does not allow when oil film thickness is less than initiation value to start mill body；After mill body starts, eddy current displacement sensor measures oil film thickness when mill body runs in real time, when oil film thickness is less than stop jumping value, mill body stop jumping, when oil film thickness is more than alarming value, mill body is properly functioning, when oil film thickness is less than alarming value and is more than stop jumping value, sends alarm signal.
Owing to using technical scheme as above, there is advantages that
Large-sized grinder main bearing oil film thickness monitoring device simple in construction of the present invention, installation and debugging are convenient；Described device is not only able to the relative gap reflecting between mill trunnion and brasses really, reach truly to measure the purpose of oil film thickness between mill trunnion and brasses, but also be capable of the real time on-line monitoring to grinder main bearing oil film thickness, thus effectively ensure that the operational reliability of large-sized grinder main bearing；Meanwhile, described device can effectively solve to measure quill shaft floatation volume, i.e. oil film thickness only could use a difficult problem for amesdial manual measurement under grinding machine resting state, thus the state-detection for grinding machine provides safety and alarm signal accurately.
[accompanying drawing explanation]
Fig. 1 is mill body base bearing brasses, spherical bush body, watt seat and mill trunnion relativeness plane graph；
Fig. 2 is the K direction view of Fig. 1；
Fig. 3 is partial enlarged drawing at the M of Fig. 2；
Fig. 4 is partial enlarged drawing at the N of Fig. 1；
Fig. 5 is partial enlarged drawing at the H of Fig. 2；
Fig. 6 eddy current displacement sensor output curve diagram；
Fig. 7 is electric control system schematic diagram；
Fig. 8 is oil film thickness measurement sensor logic control chart.
In figure: 1, eddy current displacement sensor；2, sensor stand；3, bracket base；4, bolt is adjusted；5, spherical bush body；6, quill shaft；7, bearing block；8, base bearing brasses；9, pressing plate.
[detailed description of the invention]
Can be explained in more detail the present invention by the following examples, the open purpose of the present invention is intended to protect all changes and improvements in the scope of the invention, the invention is not limited in the following examples:
In conjunction with the large-sized grinder main bearing oil film thickness monitoring device described in accompanying drawing 1～5, described device comprises eddy current displacement sensor 1, sensor stand 2 and bracket base 3；Described eddy current displacement sensor 1 is arranged on one end of sensor stand 2, the other end of sensor stand 2 is held within mill body on the bracket base 3 of base bearing spherical bush body 5 bottom by adjusting bolt 4 and packing ring, this bracket base 3 and sensor stand 2 can be with spherical bush body 5 automatic alignings, the convex platform end face of the quill shaft 6 in the induction end correspondence mill body of eddy current displacement sensor 1, and eddy current displacement sensor 1 can be by adjusting the entrance linear operating region, position of sensor stand 2；Described eddy current displacement sensor 1 connects signal processing and the control system having the signal for being gathered to carry out processing and inputting grinding machine PLC；
When mill body runs, utilize the lubricating oil that lubrication station pumps out, between quill shaft 6 and base bearing brasses 8, form the oil film of respective thickness, so that it is guaranteed that axle journal does not contacts with brasses, and ensure the properly functioning of mill body；Spherical bush body 5 is fixedly connected with the pressing plate 9 for limiting base bearing brasses 8 and spherical bush body 5 radial displacement, and what base bearing brasses 8 was provided with turn up, and flange can limit the axial displacement of spherical bush body 5；Being dolioform linear contact lay between spherical bush body 5 and bearing block 7, therefore have good regulation of mental activities performance, when the cylinder of mill body causes deformation due to temperature, load or alignment error etc., bearing can adjust automatically, thus ensures that mill body normally works；
In conjunction with accompanying drawing 3～4, sensor stand 2 is fixed on spherical bush body 5 by bracket base 3 and adjustment bolt 4, current vortex position sensor 1 is arranged on sensor stand 2, the oil film thickness formed between quill shaft 6 and base bearing brasses 8 can be measured the distance between itself and quill shaft 6 convex platform by eddy current displacement sensor 1 and obtain, owing to base bearing brasses 8 can be with spherical bush body 5 automatic aligning, therefore the measured value of eddy current displacement sensor 1 reflects the gap between mill body quill shaft 6 and base bearing brasses 8 the most truly, the oil film thickness i.e. formed between quill shaft 6 and base bearing brasses 8；
In conjunction with accompanying drawing 3 and 6, eddy current displacement sensor 1 selects the measurement range of linearity suitable, highly sensitive, capacity of resisting disturbance is strong, the non-contact measurement sensor not affected by lubricating oil, i.e. according to the material of mill body end cap, simulated field temperature and applying working condition, demarcate its curve of output, it is therefore desirable to adjusts initial measurement spacing at A, eddy current displacement sensor 1 measured value is made to enter the range of linearity, it is ensured that eddy current displacement sensor 1 output has the preferable linearity；For the ease of on-the-spot adjustment, the adjustment pad of respective thickness can be put into bracket base 3 at the position B that sensor stand 2 contacts, then adjustment bolt 4 is tightened, again the gap A between eddy current displacement sensor 1 and quill shaft 6 is adjusted to 0mm, unclamp adjustment bolt 4 the most again, remove adjustment pad, now, just self-assembling formation and the spacing adjusting pad consistency of thickness at the A of gap；In order to ensure the accurate of measured value, the end face C of the corresponding eddy current displacement sensor 1 of quill shaft 6 should not have scar, aperture or crack, and this surface roughness at least should arrive 3.2 m, and run-out tolerance is within 0.05mm；
In conjunction with accompanying drawing 5, owing between mill body quill shaft 6 and base bearing brasses 8, free end and fixing end at grinding machine exists different gaps, i.e. grinding mill barrel considers the impact of temperature, the gap of 15～25mm is had at the D of its base bearing free end, therefore, in mill body, the free end of base bearing holds correspondence to be respectively provided with a spherical bush body 5 with fixing, two spherical bush bodies 5 are fixedly connected with sensor stand 2 by bracket base 3 and adjustment bolt 4 respectively, and the outside screw hole of the sensor stand 2 of correspondence base bearing free end is provided with an eddy current displacement sensor 1, the inside thread hole of another sensor stand 2 that corresponding base bearing fixes end is provided with another eddy current displacement sensor 1；
In conjunction with accompanying drawing 7, signal processing and the control system operation principle of described eddy current displacement sensor 1 are as follows: eddy current displacement sensor 1 is powered by isolation distributor, the signal gathered enters the analog module in the main PLC of mill body by isolation distributor output 4～20mA signal, by central processing unit CPU, signal is processed, simultaneously, switch board door has the man machine interface of touch-screen type, man machine interface is by network and CPU communication, the oil film thickness signal of base bearing after treatment shows in man machine interface, thus reach to realize the purpose of real time on-line monitoring of base bearing oil film thickness at mill body run duration；Additionally, there is the technical staff of qualification can revise parameter in man machine interface, and according to field condition, alarming value and trip value are revised accordingly；
In conjunction with accompanying drawing 8, the mill body operation principle installing described device is as follows: ensure the properly functioning of mill body by suitable the arrange initiation value of oil film thickness, alarming value and stop jumping value, after main bearing lubrication station starts, eddy current displacement sensor 1 measure in real time mill body static time oil film thickness, when oil film thickness is more than initiation value, mill body starts, and does not allow when oil film thickness is less than initiation value to start mill body；After mill body starts, eddy current displacement sensor 1 measures oil film thickness when mill body runs in real time: when oil film thickness is less than stop jumping value, mill body stop jumping, when oil film thickness is more than alarming value, mill body is properly functioning, when oil film thickness is less than alarming value and is more than stop jumping value, send alarm signal.
Part not in the detailed description of the invention is prior art, therefore the present invention is not described in detail.
Claims (7)
1. a large-sized grinder main bearing oil film thickness monitoring device, is characterized in that: described device comprises eddy current displacement sensor (1), sensor stand (2) and bracket base (3)；Described eddy current displacement sensor (1) is arranged on one end of sensor stand (2), the other end of sensor stand (2) is held within the bracket base (3) of base bearing spherical bush body (5) bottom in mill body by adjusting bolt (4) and packing ring, and this bracket base (3) and sensor stand (2) can be with spherical bush body (5) automatic alignings；Quill shaft (6) in the induction end correspondence mill body of described eddy current displacement sensor (1), eddy current displacement sensor (1) can be by adjusting the entrance linear operating region, position of sensor stand (2), and eddy current displacement sensor (1) connects and has the signal for being gathered to carry out processing and inputting signal processing and the control system of grinding machine PLC；It is dolioform linear contact lay between spherical bush body (5) and bearing block (7) in described mill body, spherical bush body (5) is fixedly connected with the pressing plate (9) for limiting base bearing brasses (8) and spherical bush body (5) radial displacement, and what base bearing brasses (8) was provided with turn up, and flange can limit spherical bush body (5) axially displacement.
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: in described mill body, the free end of base bearing holds correspondence to be respectively provided with a spherical bush body (5) with fixing, two spherical bush bodies (5) are fixedly connected with sensor stand (2) by bracket base (3) and adjustment bolt (4) respectively, and the outside screw hole of the sensor stand (2) of correspondence base bearing free end is provided with an eddy current displacement sensor (1), the inside thread hole of another sensor stand (2) that corresponding base bearing fixes end is provided with another eddy current displacement sensor (1).
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: described device is when application, first will put into the adjustment pad of respective thickness between corresponding with bracket base (3) for sensor stand (2) position contacted, then adjustment bolt (4) is tightened, zero clearance will be adjusted to again between eddy current displacement sensor (1) and mill body quill shaft (6), now, unclamp adjustment bolt (4), remove adjustment pad, so that forming and adjust the spacing of pad consistency of thickness between eddy current displacement sensor (1) and quill shaft (6).
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: the end face of the corresponding eddy current displacement sensor (1) of described quill shaft (6) requires to have scar, aperture or crack, and roughness is at least up to 3.2 m, run-out tolerance is within 0.05mm.
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: described eddy current displacement sensor (1) selects the measurement range of linearity suitable, highly sensitive, that capacity of resisting disturbance is affected by lubricating oil by force and not non-contact measurement sensor.
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: described eddy current displacement sensor (1) is powered by isolation distributor, its signal gathered enters the analog module in the main PLC of mill body by isolation distributor output 4～20mA signal, by central processing unit CPU, signal is processed, simultaneously, switch board door is provided with man-machine touch screen interface, this interface is by network and CPU communication, and the signal of base bearing oil film thickness after treatment is shown, realize the real time on-line monitoring of base bearing oil film thickness at mill body run duration with this.
Large-sized grinder main bearing oil film thickness monitoring device the most according to claim 1, it is characterized in that: described device is after main bearing lubrication station starts, oil film thickness when eddy current displacement sensor (1) real-time measurement mill body is static, when oil film thickness is more than initiation value, mill body starts, and does not allow when oil film thickness is less than initiation value to start mill body；After mill body starts, eddy current displacement sensor (1) measures oil film thickness when mill body runs in real time, when oil film thickness is less than stop jumping value, mill body stop jumping, when oil film thickness is more than alarming value, mill body is properly functioning, when oil film thickness is less than alarming value and is more than stop jumping value, sends alarm signal.
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| CN201410001259.8A CN103743332B (en) | 2014-01-03 | 2014-01-03 | A kind of large-sized grinder main bearing oil film thickness monitoring device |
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| CN201410001259.8A CN103743332B (en) | 2014-01-03 | 2014-01-03 | A kind of large-sized grinder main bearing oil film thickness monitoring device |
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| CN103743332B true CN103743332B (en) | 2016-12-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109059745A (en) * | 2018-09-04 | 2018-12-21 | 天津大学 | Capacitance sensor calibration method and apparatus for oil film thickness measurement |
| CN109631738B (en) * | 2018-12-20 | 2020-07-24 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Water film thickness monitoring system and method for water lubricated bearing |
| CN110595774B (en) * | 2019-08-30 | 2021-08-17 | 河南省安装集团有限责任公司 | High-pressure oil film detection process for main shaft bearing of barrel mill |
| CN113375623A (en) * | 2021-06-30 | 2021-09-10 | 中国第一汽车股份有限公司 | Device and method for measuring thickness of oil film of main bearing of engine |
| CN114264399A (en) * | 2021-10-25 | 2022-04-01 | 浙江零跑科技股份有限公司 | Method for testing axial force of rotor of pure electric vehicle drive assembly |
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| JP4874465B2 (en) * | 2000-03-28 | 2012-02-15 | 株式会社東芝 | Eddy current loss measurement sensor |
| JP2002148012A (en) * | 2000-11-08 | 2002-05-22 | Ulvac Japan Ltd | Apparatus and method for measurement of film thickness |
| CN201371066Y (en) * | 2009-03-06 | 2009-12-30 | 中信重工机械股份有限公司 | Automatic aligning device for bearing bushes of slide shoe bearing of mill |
| CN102175762A (en) * | 2011-03-02 | 2011-09-07 | 东北电力大学 | Device for monitoring oil film stiffness and thickness of sliding bearings |
| CN203003172U (en) * | 2012-11-20 | 2013-06-19 | 芜湖日升重型机床有限公司 | Oil film thickness measuring device with frequent display function |
| CN203100673U (en) * | 2012-12-17 | 2013-07-31 | 四川矿山机器（集团）有限责任公司 | Ball mill base bearing oil film monitoring system |
| CN203298717U (en) * | 2013-05-14 | 2013-11-20 | 武汉理工大学 | Oil film thickness detection device between diesel engine cylinder sleeve and piston ring and based on eddy current |
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