CN102935398B - Zero adjustment method used during large-scale mill cylinder stress force measurement - Google Patents
Zero adjustment method used during large-scale mill cylinder stress force measurement Download PDFInfo
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- CN102935398B CN102935398B CN201210398390.3A CN201210398390A CN102935398B CN 102935398 B CN102935398 B CN 102935398B CN 201210398390 A CN201210398390 A CN 201210398390A CN 102935398 B CN102935398 B CN 102935398B
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Abstract
The invention provides a zero adjustment method used during large-scale mill cylinder stress force measurement, and relates to the field of stress force measurement. According to the present invention, a strain gage is arranged on a cylinder, and then the cylinder rotates, such that the strain gage is on the neutral surface of the cylinder; and then loading is performed on the cylinder, and a change of stress force/strain is observed through a strain meter until the stress force/strain remains a substantially constant state or the change is within a given small range so as to complete zero adjustment of the large-scale mill cylinder. With the zero adjustment method, accurate large-scale mill cylinder stress force measurement is achieved, and damage on the cylinder by the stress force caused by the cylinder self-weight is well overcome. In addition, the zero adjustment method has advantages of simple operation, high measurement accuracy and the like, and is suitable for wide range promotion and application.
Description
[technical field]
The present invention relates to stress measurement field, be specifically related to a kind of adjusting zero method while measuring large-sized grinding mill barrel stress.
[background technology]
Known, large-sized grinder is the key equipment that the mineral aggregate after fragmentation is pulverized again, large-sized grinder is in metallic ore and nonmetallic ore ore dressing plant, construction material, refractory material, cement, coal, electric power, in the mineral aggregate grinding operation of the industries such as chemical fertilizer and metallurgy, be widely used, large-sized grinder taking barrel diameter as 900mm is example, it is the main element of grinding machine at grinding machine middle cylinder body, and grinding machine is in the time of real work, the cylindrical shell of grinding machine is owing to being subject to for a long time the effect of alternate load in rotating operation process, therefore the destruction of grinding mill barrel is be mainly subject to the fatigue that alternate load causes and destroyed by grinding mill barrel, the length in grinding mill barrel life-span has directly determined the life-span of grinding machine entirety so, in order to overcome above-mentioned technical problem, those skilled in the art drop into a large amount of funds and energy study cylindrical shell extraneous load because usually improving the service life of cylindrical shell, but ignored because of the conduct oneself with dignity damage of the grinding mill barrel causing of cylindrical shell, so how conduct oneself with dignity and cause grinding mill barrel to produce the dangerous position of stress by measuring by grinding mill barrel, and then the expansion rate of prediction grinding mill barrel crackle ensures the normal operation of grinding machine and the service life of improving grinding mill barrel, that is to say that current those skilled in the art have ignored the stress being caused by the deadweight of grinding mill barrel in the time that grinding mill barrel is measured, because the deadweight of grinding mill barrel is larger, become by the conduct oneself with dignity stress that causes of cylindrical shell the main factor that cylindrical shell damages, and the method that the stress also deadweight not being caused in prior art is measured, so how the cylindrical shell of grinding machine is carried out effective zeroing and has just been become those skilled in the art's long-term technology demand.
[summary of the invention]
In order to overcome above-mentioned deficiency, the invention provides a kind of adjusting zero method while measuring large-sized grinding mill barrel stress, the present invention by arranging foil gauge on cylindrical shell, then rotating cylinder, make on the neutral surface of foil gauge in cylindrical shell, then cylindrical shell is loaded, observe the variation of stress/strain by deformeter, until stress/strain remains unchanged substantially, or change in given small scope, completed the zeroing to large-sized grinding mill barrel, overcome preferably due to the cylindrical shell damage that the stress that causes causes cylindrical shell of conducting oneself with dignity by application of the present invention, it is easy that the present invention has measurement, certainty of measurement advantages of higher, be applicable to large-scale promotion and application.
For realizing goal of the invention as above, the present invention adopts technical scheme as described below:
An adjusting zero method while measuring large-sized grinding mill barrel stress, first according to the structure of cylindrical shell, is reduced to one end by cylindrical shell and fixes, and then the beam of other end freely-supported finds out the neutral surface of cylindrical shell, specifically comprises the steps:
The first step: slightly look for neutral surface, first at least one foil gauge is fixed on cylindrical shell, then rotating cylinder, makes foil gauge in the horizontal center of cylindrical shell eminence, even on the neutral surface of foil gauge in cylindrical shell, it is carried out to coarse zero;
Second step: cylindrical shell is carried out to repeated loading, each size loading is nominal load between 15 5 percent to 1, observe the variation of stress/strain simultaneously, if stress/strain substantially remains unchanged or changes at one of percentage to 3 percent scopes, think on the neutral surface of foil gauge in cylindrical shell, now the deformeter zeroing being connected with foil gauge is completed to zeroing process;
The 3rd step: as larger in the variation of stress/strain, be to rotate up and down within the scope of 0～5 degree cylindrical shell at corner, observe the situation of change of stress/strain simultaneously, repeat second step, to 3 percent scopes, complete zeroing process at one of percentage until stress/strain changes.
Adjusting zero method when described measurement grinding mill barrel stress, described cylindrical shell is hollow structure, left end at cylindrical shell is provided with left end cap, right-hand member at cylindrical shell is provided with right end cap, on the outer edge surface of described right end cap, be provided with gear, described gear connects actuating unit, and wherein left end cap and right end cap are fixed in frame and are rotated by bearing respectively, middle part at left end cap is provided with charging aperture, is provided with discharging opening at the middle part of right end cap.
Adjusting zero method when described measurement large-sized grinding mill barrel stress, described foil gauge is resistance strain gage or optical strain gauge strips.
Adjusting zero method when described measurement large-sized grinding mill barrel stress, described resistance strain gage is 120 ohm of foil gauges.
Adjusting zero method when described measurement large-sized grinding mill barrel stress, described foil gauge is bonding or snap fit onto on the neutral surface of cylindrical shell.
Adopt technical scheme as above, the present invention has superiority as described below:
A kind of adjusting zero method while measuring large-sized grinding mill barrel stress of the present invention, the present invention by arranging foil gauge on cylindrical shell, then rotating cylinder, make on the neutral surface of foil gauge in cylindrical shell, then cylindrical shell is loaded, observe the variation of stress/strain by deformeter, until stress/strain remains unchanged substantially, or change in given small scope, completed the zeroing to large-sized grinding mill barrel, realize the Measurement accuracy to large-sized grinding mill barrel stress by application of the present invention, overcome preferably due to the cylindrical shell damage that the stress that causes causes cylindrical shell of conducting oneself with dignity, the present invention has easy and simple to handle, certainty of measurement advantages of higher, be applicable to large-scale promotion and application.
[brief description of the drawings]
The structure diagram of Fig. 1 grinding mill barrel of the present invention;
In figure: 1, left end cap; 2, bearing; 3, charging aperture; 4, foil gauge; 5, gear; 6, neutral surface; 7, discharging opening; 8, cylindrical shell; 9, right end cap.
[detailed description of the invention]
Can explain in more detail the present invention by the following examples, the present invention is not limited to the following examples;
Adjusting zero method when a kind of described in 1 measures large-sized grinding mill barrel stress by reference to the accompanying drawings, first according to the structure of cylindrical shell 8, cylindrical shell 8 is reduced to one end to be fixed, the beam of other end freely-supported, then find out the neutral surface 6 of cylindrical shell 8, described cylindrical shell 8 is hollow structure, be provided with left end cap 1 at the left end of cylindrical shell 8, be provided with right end cap 9 at the right-hand member of cylindrical shell 8, on the outer edge surface of described right end cap 9, be provided with gear 5, described gear 5 connects actuating unit, wherein left end cap 1 and right end cap 9 are fixed in frame and are rotated by bearing 2 respectively, be provided with charging aperture 3 at the middle part of left end cap 1, be provided with discharging opening 7 at the middle part of right end cap 9, specifically comprise the steps:
The first step: slightly look for neutral surface 6, first at least one foil gauge 4 is fixed on cylindrical shell 8, described foil gauge 4 is bonding or snap fit onto on the neutral surface 6 of cylindrical shell 8, then rotating cylinder 8, described foil gauge 4 is resistance strain gage or optical strain gauge strips, make foil gauge 4 in the horizontal center of cylindrical shell 8 eminence, even on the neutral surface 6 of foil gauge 4 in cylindrical shell 8, it is carried out to coarse zero;
Second step: cylindrical shell 8 is carried out to repeated loading, each size loading is nominal load between 15 5 percent to 1, preferably 10 of load is best, observe the variation of stress/strain simultaneously, if stress/strain substantially remains unchanged or changes at one of percentage to 3 percent scopes, think on the neutral surface 6 of foil gauge 4 in cylindrical shell 8, now the deformeter zeroing being connected with foil gauge 4 is completed to zeroing process;
The 3rd step: as larger in the variation of stress/strain, be to rotate up and down within the scope of 0～5 degree cylindrical shell 8 at corner, observe the situation of change of stress/strain simultaneously, repeat second step, to 3 percent scopes, complete zeroing process at one of percentage until stress/strain changes.
Adjusting zero method when described measurement large-sized grinding mill barrel stress, described resistance strain gage is 120 ohm of foil gauges.
Part not in the detailed description of the invention is prior art.
The embodiment selecting in this article for open object of the present invention, currently thinks suitablely, still, will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and invention scope.
Claims (5)
1. the adjusting zero method while measuring large-sized grinding mill barrel stress, it is characterized in that: first according to the structure of cylindrical shell (8), cylindrical shell (8) is reduced to one end and fixes, the beam of other end freely-supported, then the neutral surface (6) of finding out cylindrical shell (8), specifically comprises the steps:
The first step: slightly look for neutral surface (6), first at least one foil gauge (4) is fixed on cylindrical shell (8), then rotating cylinder (8), make foil gauge (4) in the horizontal center of cylindrical shell (8) eminence, even if the neutral surface (6) of foil gauge (4) in cylindrical shell (8) is upper, foil gauge (4) is carried out to coarse zero;
Second step: cylindrical shell (8) is carried out to repeated loading, each size loading is nominal load between 15 5 percent to 1, observe the variation of stress/strain simultaneously, if stress/strain substantially remains unchanged or changes at one of percentage to 3 percent scopes, think that the neutral surface (6) of foil gauge (4) in cylindrical shell (8) is upper, now the deformeter zeroing being connected with foil gauge (4) is completed to zeroing process;
The 3rd step: as larger in the variation of stress/strain, be to rotate up and down within the scope of 0～5 degree cylindrical shell (8) at corner, observe the situation of change of stress/strain simultaneously, repeat second step, to 3 percent scopes, complete zeroing process at one of percentage until stress/strain changes.
2. adjusting zero method when measurement grinding mill barrel stress according to claim 1, it is characterized in that: described cylindrical shell (8) is hollow structure, be provided with left end cap (1) at the left end of cylindrical shell (8), be provided with right end cap (9) at the right-hand member of cylindrical shell (8), on the outer edge surface of described right end cap (9), be provided with gear (5), described gear (5) connects actuating unit, wherein left end cap (1) and right end cap (9) are fixed in frame and are rotated by bearing (2) respectively, be provided with charging aperture (3) at the middle part of left end cap (1), be provided with discharging opening (7) at the middle part of right end cap (9).
3. adjusting zero method when measurement grinding mill barrel stress according to claim 1, is characterized in that: described foil gauge (4) is resistance strain gage or optical strain gauge strips.
4. adjusting zero method when measurement grinding mill barrel stress according to claim 3, is characterized in that: described resistance strain gage is 120 ohm of foil gauges.
5. adjusting zero method when measurement grinding mill barrel stress according to claim 1, is characterized in that: described foil gauge (4) is bonding or snap fit onto on the neutral surface (6) of cylindrical shell (8).
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| CN201210398390.3A CN102935398B (en) | 2012-10-19 | 2012-10-19 | Zero adjustment method used during large-scale mill cylinder stress force measurement |
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| CN201210398390.3A CN102935398B (en) | 2012-10-19 | 2012-10-19 | Zero adjustment method used during large-scale mill cylinder stress force measurement |
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| CN102935398B true CN102935398B (en) | 2014-08-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017188901A1 (en) * | 2016-04-28 | 2017-11-02 | Dal Elektrik Ve Otomasyon Sistemleri San. Tic. A. S. | A grinding mill and material weight determining method for the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387634A (en) * | 2008-10-17 | 2009-03-18 | 东南大学 | Uniaxial tension loading unit for testing concrete carbonizing performance under tensile stress and testing method |
| CN201449301U (en) * | 2009-05-06 | 2010-05-05 | 江苏科行环境工程技术有限公司 | Hoop stress online detection device of horomill barrel body |
| CN101799342A (en) * | 2010-03-30 | 2010-08-11 | 中国船舶重工集团公司第七〇二研究所 | Stress measuring device and method of liquid storage container |
| CN102706953A (en) * | 2012-05-30 | 2012-10-03 | 西南石油大学 | Rapid detection method for stress concentration of heat-treated workpiece |
-
2012
- 2012-10-19 CN CN201210398390.3A patent/CN102935398B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387634A (en) * | 2008-10-17 | 2009-03-18 | 东南大学 | Uniaxial tension loading unit for testing concrete carbonizing performance under tensile stress and testing method |
| CN201449301U (en) * | 2009-05-06 | 2010-05-05 | 江苏科行环境工程技术有限公司 | Hoop stress online detection device of horomill barrel body |
| CN101799342A (en) * | 2010-03-30 | 2010-08-11 | 中国船舶重工集团公司第七〇二研究所 | Stress measuring device and method of liquid storage container |
| CN102706953A (en) * | 2012-05-30 | 2012-10-03 | 西南石油大学 | Rapid detection method for stress concentration of heat-treated workpiece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017188901A1 (en) * | 2016-04-28 | 2017-11-02 | Dal Elektrik Ve Otomasyon Sistemleri San. Tic. A. S. | A grinding mill and material weight determining method for the same |
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Inventor after: Wang Lansheng Inventor after: Wan Yong Inventor after: Zou Shengyong Inventor after: Li Jishun Inventor after: Cao Mingsheng Inventor after: Liu Zhengkui Inventor after: Bai Jie Inventor after: Zhang Hongxing Inventor after: Yuan Yanjie Inventor before: Wang Lansheng Inventor before: Wan Yong Inventor before: Zou Shengyong Inventor before: Li Jishun Inventor before: Liu Zhengkui Inventor before: Bai Jie Inventor before: Zhang Hongxing Inventor before: Yuan Yanjie |
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Free format text: CORRECT: INVENTOR; FROM: WANG LANSHENG WAN YONG ZOU SHENGYONG LI JISHUN LIU ZHENGKUI BAI JIE ZHANG HONGXING YUAN YANJIE TO: WANG LANSHENG WAN YONG ZOU SHENGYONG LI JISHUN CAO MINGSHENG LIU ZHENGKUI BAI JIE ZHANG HONGXING YUAN YANJIE |
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