CN103145155A - Method for preventing damage on large rolling ring of steam roaster by automatic and skillful engine oil film coating process replacing water cooling process - Google Patents
Method for preventing damage on large rolling ring of steam roaster by automatic and skillful engine oil film coating process replacing water cooling process Download PDFInfo
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- CN103145155A CN103145155A CN2011104197265A CN201110419726A CN103145155A CN 103145155 A CN103145155 A CN 103145155A CN 2011104197265 A CN2011104197265 A CN 2011104197265A CN 201110419726 A CN201110419726 A CN 201110419726A CN 103145155 A CN103145155 A CN 103145155A
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- rolling ring
- large rolling
- oil film
- water cooling
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Abstract
The invention relates to a method for preventing damage on a large rolling ring of a steam roaster by an automatic and skillful engine oil film coating process replacing a water cooling process. The invention relates to various steam roasters in a soda ash industry. The method finds a large rolling ring damage mechanism and is the optimal method for preventing a large rolling ring from corrosion, damage and fracture for a long time. The fact proves that large rolling ring damage is caused by corrosion fatigue (mainly caused by water) and corrosion is essentially produced by an electrochemical reaction. The optimal method is characterized in that an automatic engine oil film coating process based on a small oil tank is carried out.
Description
Technical field: soda industry, chemical machinery
Background technology: the present invention relates to the steam roaster of all size in soda industry, find the mechanism that its large rolling ring damages, and protect for a long time it not weather, the best approach of damaging and even rupturing.
Soda industry is production capacity, power consumption, the environmental protection rich and influential family, and steam roaster from the sixties in last century since China comes out, with the superiority of its each side, be doomed to become main machinery, it almost determines the destiny that soda ash is produced.
But large rolling ring is often damaged just as the vertebrae of this huge machinery, and take Qingdao Alkali Plant as example: before 1985, three stoves advance the rolling ring of alkali end, move 2 to 3 years and just produce localized cracks and bulk layers skin, causes gradually large rolling ring fracture.In operational process, because smooth finish and the tolerance and size of large rolling ring are constantly destroyed, make body of heater produce fierce vibration, cause the large bearing of support roller often broken (basal amplitude reaches 0.51mm), the continuity of producing in serious threat.Through adjusting, the contact stress value of large rolling ring proves original design errorless in allowed band.
From the angle of theory of machines, above-mentioned situation should not appear, but being water always, this equipment comes Cooling and Lubricator, the crux of problem is just here.
Viewpoint from fracture mechanics, water is weak corrosive medium, it acts on the rolling ring that is subjected to static stress and repeated stress, the damage of rolling ring just belongs to the destruction that generation is united in stress corrosion and corrosion fatigue, and this destruction generally produces under weak corrosive medium and low-stress effect, if there is no the combined action of dielectric corrosion, parts under low-stress generally can not destroy, equally, if there is no the combined action of low-stress, the parts under weak corrosive medium effect can failure yet.About this mechanism, opinions vary.Fact proved: " mechanical electrochemistry reaction hypothesis " is the most realistic.(seeing Fig. 1)
at first, it is surperficial that water acts on large rolling ring, form one deck passivation protection film, (Fig. 1 .a), if there is no stress, large rolling ring surface will not be subject to further corrosion, but under the effect of tensile stress sigma, regional area produces viscous deformation, form glide step, the passive film on surface is destroyed, the metallic surface that exposure makes new advances, this new surface plays anodize (Fig. 1 .b), and most of passivation protection film plays cathodic process, the constitutional chemistry battery, stop passive film to recover, or passive film destroys again after forming immediately, so go down, the accelerated dissolving of metal (anode), impel crackle to metal inside expansion (Fig. 1 .c)
Anodic reaction: M → M
++ e
Cathodic reaction: e+H
+→ H
In a word, the hypothesis of " mechanical electrochemistry reaction " is thought: the condition that causes stress corrosion is the effect of tensile stress, and the essence of corrosion is electrochemical reaction.Fracture theory explanation in addition: the parts life-span under the corrosion fatigue effect is very low, and under the simple repeated stress effect of some ratios, the life-span of parts is hanged down one more than the order of magnitude.
Summary of the invention: after finding above-mentioned large rolling ring damage mechanism in 1985, just very simple and solved rapidly this soda industry and last the great difficult problem that reached more than 20 years.
Obviously, the best approach is exactly to remove wrong " water cooling ", replaces machine oil (the preferably MoS2 machine oil of 3% to 5%-volume ratio) oil film and constantly protects operating large rolling ring, avoids the generation of " galvanic etching ".
Design forces diesel system (oil pump, valve, pipeline etc.) too complicated, and on-the-spot environmental protection does not allow again, in case particularly oil pump has been broken (unavoidably), in the short period of time, large rolling ring just can be destroyed, and this measure is improper.
Therefore, just designed a little fuel tank take capillary theory as foundation, this fuel tank can be made arbitrarily with the type of furnace is random, and basic configuration can be square.Material: steel plate.Be arranged on above left support roller safety screen, upper cover overlaps with the rolling ring horizontal axis, it is 10mm that the fuel tank inner engine oil is soaking a volume thickness, width is the industrial felt of 400mm (the φ 2500mm type of furnace), make its end face tight note as tongue the large rolling ring of running, the machine oil of absorption is being smeared automatically, oil film and large rolling ring are everlasting.(oil consumption≤1kg/ platform stove. day---the φ 2500mm type of furnace) Fig. 2.
Description of drawings: Fig. 1 invests the above-mentioned background technology.
Fig. 2 invests the foregoing invention content.
Embodiment: as described above, remove " water cooling " system.The good little fuel tank of device gets final product.
Implement two examples:
(1) Qingdao Alkali Plant:
1.1983 year August, hansel on 2# stove has in spite of illness only been used the time of one month, and the uneven surface of large rolling ring just is rendered as the mirror face.
2.1984 year to 1985 with after, three old stoves are all without new crackle, old crackle is miraculous has played the crack arrest effect, entirely is shiny surface and contacts.
3.1983 year so far, the large rolling ring of seven stoves is " in good health " all, and the large bearing of support roller is bad mistake seldom, has reached and has moved continuously decades.
(2) Tianjin Caustic Soda Plant:
The Japan colleague had two people to see just to walk in five minutes to Qingdao Alkali Plant's 5# stove in 1986, afterwards, Japan has just produced the steam roaster of two φ 3m * 30m and has sold Tianjin Caustic Soda Plant, operation is less than half a year, broken because of oil pump and cause large rolling ring wearing and tearing, Tianjin Caustic Soda Plant sends a slip-stick artist to look for me to ask for little fuel tank data and has just solved this difficult problem.Before this, Japan is also " water cooling ", after having seen the effect of Qingdao Alkali Plant's use, has just also adopted the large rolling ring of oil film protection, has only designed one and has overlapped " mechanical lubrication " system.
Claims (3)
1. the present invention is intended to solve the great difficult problem that in soda industry, the large rolling ring of the steam roaster of all size damages; at first theoretically find the mechanism of its damage: be water-cooled galvanic corrosion; thereby firmly remove water cooling system; and then invention protects it not weather for a long time; the optimum method that damages and even rupture; that be exactly little fuel tank automatically be coated with ingeniously the machine oil film, be in operation and protected.
2. according to claim 1: key is to remove the water cooling system of the large rolling ring of steam roaster.
3. according to claim 1: main points are the in addition oil film protections of automatic oiling device that arrange take capillary theory as basis, or similarly lubricant and device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104197265A CN103145155A (en) | 2011-12-06 | 2011-12-06 | Method for preventing damage on large rolling ring of steam roaster by automatic and skillful engine oil film coating process replacing water cooling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104197265A CN103145155A (en) | 2011-12-06 | 2011-12-06 | Method for preventing damage on large rolling ring of steam roaster by automatic and skillful engine oil film coating process replacing water cooling process |
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| CN103145155A true CN103145155A (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104197265A Pending CN103145155A (en) | 2011-12-06 | 2011-12-06 | Method for preventing damage on large rolling ring of steam roaster by automatic and skillful engine oil film coating process replacing water cooling process |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105801A (en) * | 1993-03-18 | 1995-07-26 | 巴马格股份公司 | Antifriction bearing |
| CN201069037Y (en) * | 2007-08-15 | 2008-06-04 | 江西铜业集团公司 | Humidifying tumbling cylinder rolling ring automatic lubrication device |
-
2011
- 2011-12-06 CN CN2011104197265A patent/CN103145155A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105801A (en) * | 1993-03-18 | 1995-07-26 | 巴马格股份公司 | Antifriction bearing |
| CN201069037Y (en) * | 2007-08-15 | 2008-06-04 | 江西铜业集团公司 | Humidifying tumbling cylinder rolling ring automatic lubrication device |
Non-Patent Citations (2)
| Title |
|---|
| 方永青等: "Φ2500蒸汽煅烧炉滚圈润滑与冷却探讨", 《化工设备与防腐蚀》, no. 2, 31 December 2003 (2003-12-31), pages 71 - 73 * |
| 柳耀宗: "Φ2500蒸汽煅烧炉滚圈改为油润滑", 《纯碱工业》, no. 1, 31 December 1985 (1985-12-31), pages 41 - 42 * |
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Application publication date: 20130612 |