CN105675486A - Experimental apparatus for measuring friction coefficient between silo wall and stored material - Google Patents
Experimental apparatus for measuring friction coefficient between silo wall and stored material Download PDFInfo
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- CN105675486A CN105675486A CN201610114838.2A CN201610114838A CN105675486A CN 105675486 A CN105675486 A CN 105675486A CN 201610114838 A CN201610114838 A CN 201610114838A CN 105675486 A CN105675486 A CN 105675486A
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- measured
- bin stock
- belt conveyor
- climbing
- climbing belt
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
Abstract
The invention discloses an experimental apparatus for testing a friction coefficient between a silo wall and a stored material. A stored material discharge device is arranged above a climbing section of a direct-movement climbing belt conveyer; a stored material recovery device is arranged at the end part of a direct-movement section of the direct-movement climbing belt conveyer; the to-be-measured stored material is arranged in the stored material discharge device; a to-be-measured silo wall sample is arranged on the direct-movement climbing belt conveyer, one end of the sample is located above the climbing section of the direct-movement climbing belt conveyer, and the other end of the sample is located on the direct-movement section of the direct-movement climbing belt conveyer; the to-be-measured silo wall sample is provided with a fixing clip, the fixing clip is fixedly connected with a dynamometer by a connecting rod, the dynamometer is higher than the direct-movement section of the direct-movement climbing belt conveyer, and the dynamometer is connected with a data acquisition unit. The experimental apparatus can be used for accurately measuring the friction coefficient between the to-be-measured silo wall and the to-be-measured stored material, dynamically observing the change of the friction coefficient between the to-be-measured silo wall and the to-be-measured stored material, and meanwhile detecting and monitoring the wear degree of the to-be-measured silo wall.
Description
Technical field
The invention belongs to construction engineering test field, be specifically related to the experimental provision of a kind of measuring cylinder silo wall and bin stock coefficient of friction.
Background technology
In Design of Silo, it is necessary to consider the frictional force between silo bulkhead and bin stock, in silo construction engineering test, it is also desirable to the frictional force between silo bulkhead and bin stock is measured.
Cao Xianjun proposes a kind of method measuring spinning, drawing rubber parts coefficient of friction in " ramp type frictionmeter ", on slide plate, sample to be tested is first placed during measurement, then slide plate is manually lifted to sample just along slide plate slides, again through the simple coefficient of friction calculating and obtaining sample with slide plate. This measuring method is higher to the specification requirement of sample, is unsuitable for the measurement of bulk cargo coefficient of friction, and manual operation is also relatively larger on the impact of experimental result.
Cheng Hongsheng etc. propose a kind of agricultural material coefficient of sliding friction method for automatic measurement in " design of a kind of agricultural material coefficient of sliding friction measurement apparatus ", they are according to inclined-plane mechanics principle and photoelectricity test technology, devise a kind of agricultural material coefficient of sliding friction self-operated measuring unit, and for Fructus Litchi, recorded the coefficient of sliding friction between Fructus Litchi and rubber slab and nylon sheet. The method is suitable for measuring the coefficient of friction of the bigger material of granule, and for the material that granule is less, measurement effect is also bad; Accuracy of instrument is required height by the method, and installation cost is relatively larger.
Summary of the invention
It is an object of the invention to provide the experimental provision of a kind of measuring cylinder silo wall and bin stock coefficient of friction, both the coefficient of friction between silo bulkhead to be measured and bin stock to be measured can accurately have been measured, the change of coefficient of friction between silo bulkhead to be measured and bin stock to be measured be can also dynamically observe, the detection to the silo bulkhead degree of wear to be measured and monitoring realized simultaneously.
The technical solution realizing the object of the invention is: the experimental provision of a kind of measuring cylinder silo wall and bin stock coefficient of friction, including climbing belt conveyor, fixation clamp, connecting rod, ergometer, data acquisition unit, bin stock drawing mechanism, the bin stock retracting device of keeping straight on.
Described bin stock drawing mechanism is arranged on above the climbing section of climbing belt conveyor of keeping straight on, bin stock retracting device is arranged on the craspedodrome section end away from climbing section of climbing belt conveyor of keeping straight on, bin stock to be measured is arranged in bin stock drawing mechanism, the bin stock to be measured in bin stock drawing mechanism is made to fall in the climbing section of climbing belt conveyor of keeping straight on, through climbing belt conveyor transmission of keeping straight on, fall in bin stock retracting device; Silo bulkhead sample to be measured is arranged on craspedodrome climbing belt conveyor, its one end is positioned at above craspedodrome climbing belt conveyor climbing section, the other end is positioned in craspedodrome climbing belt conveyor craspedodrome section, silo bulkhead sample to be measured is provided with fixation clamp, fixation clamp is connected with ergometer by connecting rod, and the position of described ergometer is higher than the craspedodrome section of climbing belt conveyor of keeping straight on; Ergometer is connected with data acquisition unit.
The thickness that the craspedodrome section discrepancy in elevation between the two is one layer of bin stock to be measured of described ergometer and climbing belt conveyor of keeping straight on.
Also including weightening finish block, described weightening finish block is fixed on silo bulkhead sample top to be measured.
Described weightening finish block is positioned at the top center of silo bulkhead sample to be measured.
Belt geo-stationary in transmitting procedure of described bin stock to be measured and climbing belt conveyor of keeping straight on.
Described ergometer and bin stock drawing mechanism homonymy, bin stock drawing mechanism does not contact with connecting rod.
The present invention compared with prior art, its remarkable advantage:
(1) ergometer and the thickness that the craspedodrome section discrepancy in elevation between the two is one layer of bin stock to be measured of climbing belt conveyor of keeping straight on, eliminate the silo bulkhead sample partical gravity to be measured interference to experimental result so that certainty of measurement is higher.
(2) fixing weightening finish block on silo bulkhead sample to be measured, it is ensured that silo bulkhead sample to be measured operates the stability in engineering, the problem simultaneously avoiding the certainty of measurement caused because frictional force the is too small inclined end so that certainty of measurement is higher at device.
(3) suitable in the measurement of coefficient of friction between the bin stock of variable grain size and silo bulkhead.
(4) change of coefficient of friction between silo bulkhead to be measured and bin stock to be measured, the degree of wear of detection silo bulkhead can dynamically be observed.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of measuring cylinder silo wall of the present invention and the experimental provision of bin stock coefficient of friction.
Detailed description of the invention
In conjunction with Fig. 1, the experimental provision of a kind of measuring cylinder silo wall and bin stock coefficient of friction, including climbing of keeping straight on, belt conveyor 1(is commercial), silo bulkhead sample 2 to be measured, fixation clamp 3, connecting rod 4, ergometer 5(commercial), data acquisition unit 6(commercial), bin stock to be measured 7, drawing mechanism 8(is commercial for bin stock), retracting device 9(is commercial for bin stock).
Described bin stock drawing mechanism 8 is arranged on above the climbing section of climbing belt conveyor 1 of keeping straight on, bin stock retracting device 9 is arranged on the end of the craspedodrome section of climbing belt conveyor 1 of keeping straight on, described end is the one end away from climbing section, bin stock 7 to be measured is arranged in bin stock drawing mechanism 8, the bin stock to be measured 7 in bin stock drawing mechanism 8 is made to fall in the climbing section of climbing belt conveyor 1 of keeping straight on, through keeping straight on, climbing belt conveyor 1 transmits, and falls in bin stock retracting device 9. Silo bulkhead sample 2 to be measured is arranged on craspedodrome climbing belt conveyor 1, its one end is positioned at above craspedodrome climbing belt conveyor 1 section of climbing, the other end is positioned at above craspedodrome climbing belt conveyor 1 section of craspedodrome, silo bulkhead sample 2 to be measured is provided with fixation clamp 3, fixation clamp 3 is connected with ergometer 5 by connecting rod 4, and the position of described ergometer 5 is higher than the craspedodrome section of climbing belt conveyor 1 of keeping straight on;Ergometer 5 is connected with data acquisition unit 6.
Further, the thickness that the craspedodrome section discrepancy in elevation between the two is one layer of bin stock 7 to be measured of described ergometer 5 and climbing belt conveyor 1 of keeping straight on. In device operation, what ergometer 5 was measured all the time is the frictional force between silo bulkhead sample 2 to be measured and bin stock to be measured 7, eliminates the silo bulkhead sample 2 partical gravity to be measured impact on experimental result.
Further, present invention additionally comprises weightening finish block 10, described weightening finish block 10 is fixed on silo bulkhead sample 2 top to be measured, it is ensured that the silo bulkhead sample 2 to be measured stability in device operation, it is to avoid the problem that the certainty of measurement that causes because frictional force is too small is on the low side. And described weightening finish block 10 is positioned at the top center of silo bulkhead sample 2 to be measured.
Further, the belt of described climbing belt conveyor 1 of keeping straight on is sufficiently coarse, ensure bin stock 7 to be measured and belt geo-stationary in transmitting procedure of climbing belt conveyor 1 of keeping straight on, be beneficial to the frictional force accurately measuring between bin stock 7 to be measured and silo bulkhead sample 2 to be measured.
Further, described bin stock drawing mechanism 8 is used for throwing in bin stock 7 to be measured, can be selected for funnel, material leakage machine etc.
Further, described bin stock retracting device 9 is used for collecting bin stock 7 to be measured, can be selected for recycling bin, collection box etc.
Further, described data acquisition unit 6, for gathering the frictional force data that ergometer 5 is surveyed, can be selected for PC or storage card etc.
Further, ergometer 5 is arranged with bin stock drawing mechanism 8 homonymy, it is ensured that the direction that silo bulkhead sample 2 to be measured is subject to is identical with the direction of motion of bin stock 7 to be measured. Connecting rod 4 does not contact with bin stock drawing mechanism 8.
Work process is as follows:
Bin stock drawing mechanism 8 loads bin stock 7 to be measured, open the power supply of climbing belt conveyor 1 of keeping straight on, climbing belt conveyor 1 of keeping straight on is started working, open bin stock drawing mechanism 8 discharging opening, bin stock 7 to be measured drops in the climbing section of climbing belt conveyor 1 of keeping straight on, owing to the position of ergometer 5 is higher than the craspedodrome section of climbing belt conveyor 1 of keeping straight on, and belt geo-stationary in transmitting procedure of bin stock to be measured 7 and climbing belt conveyor 1 of keeping straight on, therefore bin stock 7 to be measured can enter between craspedodrome section and the silo bulkhead sample 2 to be measured of climbing belt conveyor 1 of keeping straight on smoothly, rub with silo bulkhead sample 2 to be measured, ergometer 5 obtains frictional force in real time, utilize data acquisition unit 6 to carry out timing simultaneously, data acquisition unit 6 gathers and processes data.
If silo bulkhead sample 2 to be measured is fixed in horizontal slide rail, silo bulkhead sample 2 to be measured can be slided along slide rail, then the measurement of frictional force is carried out, can cause that the frictional force recorded is not the frictional force between pure silo bulkhead sample 2 to be measured and bin stock to be measured 7, further comprises the frictional force between silo bulkhead sample 2 to be measured and slide rail.
Embodiment 1
The experimental provision of a kind of measuring cylinder silo wall and bin stock coefficient of friction, including climbing of keeping straight on, belt conveyor 1(is commercial), silo bulkhead sample 2 to be measured, fixation clamp 3, connecting rod 4, ergometer 5(commercial), data acquisition unit 6(commercial), bin stock to be measured 7, drawing mechanism 8(is commercial for bin stock), retracting device 9(is commercial for bin stock).
Described bin stock drawing mechanism 8 is arranged on above the climbing section of climbing belt conveyor 1 of keeping straight on, bin stock retracting device 9 is arranged on the end of the craspedodrome section of climbing belt conveyor 1 of keeping straight on, described end is the one end away from climbing section, bin stock 7 to be measured is arranged in bin stock drawing mechanism 8, the bin stock to be measured 7 in bin stock drawing mechanism 8 is made to fall in the climbing section of climbing belt conveyor 1 of keeping straight on, through keeping straight on, climbing belt conveyor 1 transmits, and falls in bin stock retracting device 9.Silo bulkhead sample 2 to be measured is arranged on craspedodrome climbing belt conveyor 1, its one end is positioned at above craspedodrome climbing belt conveyor 1 section of climbing, the other end is positioned at above craspedodrome climbing belt conveyor 1 section of craspedodrome, silo bulkhead sample 2 to be measured is provided with fixation clamp 3, fixation clamp 3 is connected with ergometer 5 by connecting rod 4, and the position of described ergometer 5 is higher than the craspedodrome section of climbing belt conveyor 1 of keeping straight on; Ergometer 5 is connected with data acquisition unit 6.
The thickness that the craspedodrome section discrepancy in elevation between the two is one layer of bin stock 7 to be measured of described ergometer 5 and climbing belt conveyor 1 of keeping straight on.
Also including weightening finish block 10, described weightening finish block 10 is fixed on silo bulkhead sample 2 top to be measured.
Described weightening finish block 10 is positioned at the top center of silo bulkhead sample 2 to be measured.
Belt geo-stationary in transmitting procedure of described bin stock to be measured 7 and climbing belt conveyor 1 of keeping straight on.
Ergometer 5 is arranged with bin stock drawing mechanism 8 homonymy, it is ensured that the direction that silo bulkhead sample 2 to be measured is subject to is identical with the direction of motion of bin stock 7 to be measured.
The concrete slab () that intensity is C40 of making in laboratory selected by silo bulkhead sample 2 to be measured, data acquisition unit 6 adopts PC, bin stock 7 to be measured adopts the clinker (mean particle size 15mm) bought, the craspedodrome section discrepancy in elevation between the two of ergometer 5 and climbing belt conveyor 1 of keeping straight on is 15mm, bin stock drawing mechanism 8 selects funnel, funnel discharging opening is provided with switch valve, and retracting device 9 adopts recycling bin.
Silo bulkhead sample 2 mass 3.86kg to be measured, fixation clamp 3 and connecting rod 4 gross mass 0.46kg, increase weight thing 10 mass 3kg, and above-mentioned four total force are.
Bin stock drawing mechanism 8 loads bin stock 7 to be measured, open the power supply of climbing belt conveyor 1 of keeping straight on, climbing belt conveyor 1 of keeping straight on is started working, open the switch valve of bin stock drawing mechanism 8 discharging opening, utilizing data acquisition unit 6 to carry out timing, data acquisition unit 6 gathers and processes data simultaneously. Coefficient of friction between silo bulkhead sample 2 to be measured and bin stock to be measured 7 is calculated by formula, and following table lists 6 groups of measurement data.
The measurement data table of table 1 frictional force and coefficient of friction
| Time/min | 5 | 15 | 25 | 35 | 45 | 55 |
| Frictional force f/N | 34.48 | 34.50 | 34.50 | 34.51 | 34.52 | 34.52 |
| 0.4807 | 0.4809 | 0.4809 | 0.4811 | 0.4812 | 0.4812 |
The present invention is suitable in the measurement of coefficient of friction between bin stock and the bulkhead of variable grain size, both can accurate coefficient of friction between measuring cylinder silo wall and bin stock, the change of coefficient of friction between silo bulkhead to be measured and bin stock to be measured be can also dynamically observe, the detection to the silo bulkhead degree of wear and monitoring realized simultaneously.
Claims (6)
1. the experimental provision of a measuring cylinder silo wall and bin stock coefficient of friction, it is characterised in that: include keep straight on climbing belt conveyor (1), fixation clamp (3), connecting rod (4), ergometer (5), data acquisition unit (6), bin stock drawing mechanism (8), bin stock retracting device (9);
Described bin stock drawing mechanism (8) is arranged on above the climbing section of climbing belt conveyor (1) of keeping straight on, bin stock retracting device (9) is arranged on the craspedodrome section end away from climbing section of climbing belt conveyor (1) of keeping straight on, bin stock to be measured (7) is arranged in bin stock drawing mechanism (8), the bin stock to be measured (7) in bin stock drawing mechanism (8) is made to fall in the climbing section of climbing belt conveyor (1) of keeping straight on, through keeping straight on, climbing belt conveyor (1) transmits, and falls in bin stock retracting device (9); Silo bulkhead sample (2) to be measured is arranged in craspedodrome climbing belt conveyor (1), its one end is positioned at above craspedodrome climbing belt conveyor (1) climbing section, the other end is positioned in craspedodrome climbing belt conveyor (1) craspedodrome section, silo bulkhead sample (2) to be measured is provided with fixation clamp (3), fixation clamp (3) is connected with ergometer (5) by connecting rod (4), and the position of described ergometer (5) is higher than the craspedodrome section of climbing belt conveyor (1) of keeping straight on;Ergometer (5) is connected with data acquisition unit (6).
2. the experimental provision of measuring cylinder silo wall according to claim 1 and bin stock coefficient of friction, it is characterised in that: the thickness that the craspedodrome section discrepancy in elevation between the two is one layer of bin stock to be measured (7) of described ergometer (5) and climbing belt conveyor (1) of keeping straight on.
3. the experimental provision of measuring cylinder silo wall according to claim 1 and bin stock coefficient of friction, it is characterised in that: also including weightening finish block (10), described weightening finish block (10) is fixed on silo bulkhead sample (2) top to be measured.
4. the experimental provision of measuring cylinder silo wall according to claim 3 and bin stock coefficient of friction, it is characterised in that: described weightening finish block (10) is positioned at the top center of silo bulkhead sample (2) to be measured.
5. the experimental provision of measuring cylinder silo wall according to claim 1 and bin stock coefficient of friction, it is characterised in that: belt geo-stationary in transmitting procedure of described bin stock to be measured (7) and climbing belt conveyor (1) of keeping straight on.
6. the experimental provision of measuring cylinder silo wall according to claim 1 and bin stock coefficient of friction, it is characterised in that: described ergometer (5) and bin stock drawing mechanism (8) homonymy, bin stock drawing mechanism (8) does not contact with connecting rod (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610114838.2A CN105675486B (en) | 2016-03-01 | 2016-03-01 | Measuring cylinder silo wall and the experimental provision of bin stock coefficient of friction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610114838.2A CN105675486B (en) | 2016-03-01 | 2016-03-01 | Measuring cylinder silo wall and the experimental provision of bin stock coefficient of friction |
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| CN105675486A true CN105675486A (en) | 2016-06-15 |
| CN105675486B CN105675486B (en) | 2018-03-09 |
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| CN205404376U (en) * | 2016-03-01 | 2016-07-27 | 南京理工大学 | Experimental device for measure silo bulkhead and bin stock coefficient of friction |
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2016
- 2016-03-01 CN CN201610114838.2A patent/CN105675486B/en active Active
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| CN102878910A (en) * | 2012-10-26 | 2013-01-16 | 中国农业大学 | Inclined plane instrument device for measuring friction coefficient and friction angle of granular materials |
| CN103091245A (en) * | 2012-12-17 | 2013-05-08 | 江苏大学 | Device and method for measuring poultry egg static friction coefficient |
| CN104020102A (en) * | 2014-06-18 | 2014-09-03 | 河南科技大学 | Device and method for measuring dynamic friction coefficients of surfaces of cereal grains and measuring method |
| CN204373577U (en) * | 2015-01-18 | 2015-06-03 | 佳木斯大学 | A kind of prose style free from parallelism agricultural material sliding friction angle measuring device |
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