CN105290707A - Repeatable repair method for impeller of agitation tank - Google Patents
Repeatable repair method for impeller of agitation tank Download PDFInfo
- Publication number
- CN105290707A CN105290707A CN201510877498.4A CN201510877498A CN105290707A CN 105290707 A CN105290707 A CN 105290707A CN 201510877498 A CN201510877498 A CN 201510877498A CN 105290707 A CN105290707 A CN 105290707A
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- blade
- impeller
- bead filler
- blades
- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a repeatable repair method for an impeller of an agitation tank. The repeatable repair method comprises the steps of blade cutting, outer circle trimming, outer circle grooving, blade machining and assembling and welding. The blade cutting step comprises the operation of detecting the damaged impeller, cutting the parts, from the roots, of blades of the impeller and then removing the cut blades. The outer circle trimming step comprises the operation of removing the surface oxidization layer and the blade welding layer of the outer circle of an impeller core of the impeller with the blades cut off. The outer circle grooving step comprises the operation of uniformly machining 2-6 clamping grooves, corresponding to the end surfaces of the blades in shape, of the outer circle of the impeller core. The blade machining step comprises the operation of machining corresponding blades according to the sizes of the original blades, the requirements, the size of the impeller core and the depth of the clamping grooves of the impeller core. The assembling and welding step comprises the operation of inserting the machined blades into the clamping grooves of the impeller core and then fixedly connecting the blades and the impeller core through welding. According to the invention, the damaged blades of the impeller are removed, the outer circle of the impeller core is trimmed and grooved so as to be matched with the newly-made blades, and therefore the damaged blades of the impeller of the agitation tank can be repaired at a high speed and at low cost, and the damaged impeller can be fast repaired without repeated grooving in the later stage. The repeatable repair method has the advantages of being simple, high in repair speed and low in cost.
Description
Technical field
The invention belongs to equipment Repairing Technology field, relate to a kind of can method for maintaining simple, repair quick, cost is low, repair after the repeated restorative procedure of tank diameter impeller of long service life.
Background technology
Tank diameter is the rotation by agitator, realizes the mediation mixing plant be uniformly mixed of slurry in groove, is widely used in the industries such as mine, metallurgy, chemical industry, environmental protection, construction.Its agitator of mining tank diameter by structure can be divided into propeller agitator, disc-type agitator, open type agitator and under plunder formula agitator, disc type and open type agitator mainly produce radial flow path, screw and under plunder formula agitator then based on axial flow path.Flowsheet of slurry agitation groove be for single-trough flotating machine operation before flowsheet of slurry agitation, make ore particle suspend and fully contact with medicament, mix, for sorting operation creates conditions, it can also be used as pre-desilication tank, stripping pit, de-washing trough and seed precipitation tank in alumina producing.Mixing arm due to tank diameter is subject to shearing force and slurry erosive wear when working, and after causing blade working a period of time, ubiquity shakes the phenomenons such as increasing, blade edge damage, causes blade failure and needs to change.Because tank diameter impeller Leaf is generally welded on the bead filler of core, integral replacing not only cost is higher, and to scrap entirety intact bead filler be also the great wasting of resources, and in general bead filler in order to be connected with drive mandrel, the accuracy of manufacture is higher, part also adopts taper hole structure, its keyway can not too increase manufacture difficulty with axis being parallel, therefore bead filler price is higher comparatively speaking, particularly for low cost prismatic blade tank diameter there is replacement cost and the higher problem of spare parts cost especially.
In prior art, cutting is adopted to remove blade after general tank diameter damage in impeller, then the method that new blade is repaired in cutting position is directly welded, although restorative procedure is simple, but there is new blade location difficulty, be welded to connect place's intensity low and later stage dynamic defects such as correcting difficulty that coordinates, be only applicable to lash-up recovering; Also the method adopting and damaged blade surface overlaying or new blade are directly welded in damaged blade back is had, but still exist overlay-operation difficulty, efficiency low, be difficult to the problem that repeatedly repeats to repair, and damaged blade back is welded new blade and is also existed because damaged blade distortion causes new blade and its laminating difficult, pad is at the comparatively serious position, edge of blade wear, weld strength and operation requirements higher, service time is hour hand comparatively, and can only revise individually the new blade of different parts, new blade manufacturing cost is high and efficiency is low.
Summary of the invention
The object of the present invention is to provide a kind of repeated restorative procedure with the tank diameter impeller that method for maintaining is simple, reparation is quick, cost is low, repair rear long service life.
The object of the present invention is achieved like this, and comprise cut-off blade, cylindrical finishing, cylindrical fluting, blade processing, assembly welding step, concrete steps are as follows:
A, cut-off blade: detect damage impeller, by bead filler can impeller blade from root cutting after remove;
B, cylindrical finishing: cylindrical step A having been excised the bead filler of the impeller of blade removes surface oxide layer and blade weld layer;
C, cylindrical are slotted: the draw-in groove that the uniform processing of cylindrical 4 ~ 6 of the bead filler obtained in step B is corresponding with vane end faces shape;
D, blade processing: according to prophyll chip size and requirement and with bead filler size and blade corresponding to draw-in groove deep processing thereof;
E, assembly welding: blade D step processed inserts in the draw-in groove of the bead filler that step C obtains, be then fixedly connected with blade with bead filler with welding.
The present invention, by being removed by the blade of impeller failure, coordinates with brand-new blade with the correction of bead filler cylindrical and fluting, realizes fast, low cost repairs tank diameter impeller damaged blade and later stage multi-time no fluting repairs impaired impeller fast, has following beneficial effect:
1, by the damaged blade removing low value, easily manufacture, and retain complex structure, bead filler that cost is higher, make whole rehabilitation cost lower;
2, after removing blade, bead filler cylindrical is removed surface oxide layer and welding metamorphic layer, for the firm welding between anaphase blade and bead filler lays the first stone, improve the service life of impeller after repairing;
3, slot at bead filler cylindrical according to blade tip shape, the quick position of blade at bead filler cylindrical can be realized, and be transferred in draw-in groove by during blade working with the stressed root that welds by routine of bead filler junction, the stress of effective reduction root of blade weld, improves the service life of impeller after repairing further;
4, independent machining blade, had both improve the working (machining) efficiency of blade, and had also improved the machining accuracy of blade, was conducive to reducing later stage dynamic balance calibration workload, and even cancelled later stage dynamic balance calibration, improve remediation efficiency;
5, blade welds after directly inserting bead filler draw-in groove, accurately and reliably, and draw-in groove itself is not fixed with blade, for the reparation that repeats of anaphase blade eliminates draw-in groove process in blade resetting, reduce repetition maintenance difficulty, also improve the efficiency repeating to repair.
Therefore, the present invention has the advantages that method for maintaining is simple, reparation is quick, cost is low, repair rear long service life.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention;
Fig. 2 is the straight plate vane blade wheel structure schematic diagram of the present invention;
Fig. 3 is the bead filler structural representation of Fig. 2;
Fig. 4 is that the A-A of Fig. 3 is to sectional structure schematic diagram;
Fig. 5 is that the B-B of Fig. 3 is to sectional structure schematic diagram;
In figure: 1-blade, 2-bead filler, 21-direct neck, 22-internal taper hole, 23-keyway.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated, but must not be limited the present invention by any way, and any change done based on training centre of the present invention or improvement, all belong to protection scope of the present invention.
As illustrated in fig. 1 and 2, the present invention includes cut-off blade, cylindrical finishing, cylindrical fluting, blade processing, assembly welding step, concrete steps are as follows:
A, cut-off blade: detect damage impeller, by bead filler can impeller blade from root cutting after remove;
B, cylindrical finishing: cylindrical step A having been excised the bead filler of the impeller of blade removes surface oxide layer and blade weld layer;
C, cylindrical are slotted: the draw-in groove that the uniform processing of cylindrical 4 ~ 6 of the bead filler obtained in step B is corresponding with vane end faces shape;
D, blade processing: according to prophyll chip size and requirement and with bead filler size and blade corresponding to draw-in groove deep processing thereof;
E, assembly welding: blade D step processed inserts in the draw-in groove of the bead filler that step C obtains, be then fixedly connected with blade with bead filler with welding.
The cylindrical monolateral removal degree of depth of the bead filler in described step B is the shallow top layer of 1 ~ 3mm.
The cylindrical of the bead filler in described step B adopts turning or milling to remove shallow top layer.
Draw-in groove in described step C becomes direct neck or the spiral channel of 30 ~ 60 °.
The bottom of described direct neck is flat bottom surface and the draw-in groove degree of depth is that middle part is the darkest along its length.
Wall thickness between the bosom, middle part of described direct neck and bead filler centre bore is not less than 10mm.
One side of described direct neck or both sides have the degree of depth be 0.5 ~ 1.5mm and angle at the groove of 60 ~ 90 °.
Blade in described D step is straight plate vane.
Blade in described D step and the width of draw-in groove linkage section are less than draw-in groove width 0.05 ~ 0.25mm.
Also comprise high-temperature annealing step after described E step, described high-temperature annealing step is that the impeller entirety after being welded with bead filler by blade enters stove below 300 DEG C, is heated to 600 ~ 650 DEG C and is incubated 2 ~ 4h, be then chilled to less than 300 DEG C air coolings of coming out of the stove with stove with stove.
Dynamic balance calibration step is also comprised after described E step, described dynamic balance calibration be by assembly welding after impeller find out the counterweight point of blade and the weight of counterweight through dynamic balance running, then obtain prewired counterweight after balance weight being deducted the welding rod weight of pre-welding, prewired counterweight pre-welding welding rod is soldered to the counterweight point of blade.
Embodiment
Straight plate vane impeller as shown in Fig. 2 to 5 is BCF-A4000 flowsheet of slurry agitation groove 1000 × H230 type impeller, and impeller is welded by a bead filler 2 and 4 blades 1.The steel plate of blade 14 wide 220mm, thick 18mm makes, and each blade and axial line angle are 45 degree.Bead filler 2 lateral surface is column structure, is welded with four blades 1, and inner surface is the taper hole 22 matched with axle, and tapering is 1:5.Impeller diameter is 1000mm.The former impeller of BCF-A4000 tank diameter is from the buying of equipment genuine, and service time is about 90d, and the vibration that the uneven wear because of blade 1 causes impeller imbalance to cause is comparatively serious, and now bead filler 21 weares and teares less.Bead filler 2 internal taper hole 22 is because coordinating with the axis of cone, make precision and will rescue height, because taper hole tapering is large, keyway 23 can not too increase manufacture difficulty with axis being parallel, therefore bead filler price is higher, so there is the situation having to abandon the intact part of high price because of impeller low price part blade damage.For saving spare parts cost and impeller use cost, therefore repair wearing and tearing impeller, its reparation step is as follows:
S100: detect damage impeller, bead filler 2 is not yet damaged and can use by the blade 1 on it from root acetylene cutting after removal;
S200: by excising the dark 1 ~ 1.5mm of the monolateral turning of cylindrical of the bead filler 2 of the impeller of blade 1 to diameter 206mm, to remove surface oxide layer and the blade weld layer of bead filler 2;
S300: by the bead filler 2 of the good cylindrical of turning the uniform Milling Process of its cylindrical 4 and the central axis of bead filler are at 45 °, flat and in the middle part of it, degree of depth is 35.5mm, width is the direct neck 21 of 18mm;
S400: make 4 straight plate vanes 1 with the wear-resisting steel plate of thick 18mm, the long 432mm of blade 1, wide 220mm, finished product blade need ensure that opposite side is concordant, thickness is even;
S500: the above-mentioned blade 1 processed is inserted in the direct neck 21 of bead filler 2, and will make to combine closely bottom blade 1 root and direct neck 21 when inserting blade 1, each blade 1 is highly equal, then adopts submerged-arc welding or CO
2blade 1 fixedly welds with bead filler 2 by gas shielded arc welding;
S500: the impeller entirety after welding is entered annealing furnace below 300 DEG C, is heated to 600 ~ 650 DEG C with stove and is incubated 2 ~ 4h, being then chilled to less than 300 DEG C air coolings of coming out of the stove to eliminate welding stress with stove;
S600: the impeller by assembly welding and after stress relief annealing finds out the counterweight point of blade 1 and the weight of counterweight through dynamic balance running, then prewired counterweight is obtained after balance weight being deducted the welding rod weight of pre-welding, prewired counterweight pre-welding welding rod is soldered to the counterweight point at blade back, thus completes the reparation of impeller.
By above-mentioned reparation step, a bead filler 2 can be passed through three to four rebladings, and because the direct neck 21 of bead filler 2 can with what process for the first time, therefore follow-up reparation can omit above-mentioned S300 step.1000 × H230 type impeller of above-mentioned BCF-A4000 tank diameter repairs two impellers by above step, impeller after reparation is used for the vibration without exception of flowsheet of slurry agitation groove and heating, floatation indicators and the new impeller phase ratio of use are without significant change, and impeller has exceeded 120d service time after repairing, its life-span has exceeded new impeller.
Claims (10)
1. the repeated restorative procedure of a tank diameter impeller, it is characterized in that comprising cut-off blade, cylindrical finishing, cylindrical fluting, blade processing, assembly welding step, concrete steps are as follows:
A, cut-off blade: detect damage impeller, by bead filler can impeller blade from root cutting after remove;
B, cylindrical finishing: cylindrical step A having been excised the bead filler of the impeller of blade removes surface oxide layer and blade weld layer;
C, cylindrical are slotted: the draw-in groove that the uniform processing of cylindrical 4 ~ 6 of the bead filler obtained in step B is corresponding with vane end faces shape;
D, blade processing: according to prophyll chip size and requirement and with bead filler size and blade corresponding to draw-in groove deep processing thereof;
E, assembly welding: blade D step processed inserts in the draw-in groove of the bead filler that step C obtains, be then fixedly connected with blade with bead filler with welding.
2. the repeated restorative procedure of tank diameter impeller according to claim 1, is characterized in that the cylindrical of the bead filler in the described step B monolateral removal degree of depth is the shallow top layer of 1 ~ 3mm.
3. the repeated restorative procedure of tank diameter impeller according to claim 2, is characterized in that the cylindrical of the bead filler in described step B adopts turning or milling to remove shallow top layer.
4. the repeated restorative procedure of tank diameter impeller according to claim 1, the draw-in groove that it is characterized in that in described step C becomes direct neck or the spiral channel of 30 ~ 60 °.
5. the repeated restorative procedure of tank diameter impeller blade according to claim 4, is characterized in that the bottom of described direct neck is flat bottom surface and the draw-in groove degree of depth is that middle part is the darkest along its length.
6. the repeated restorative procedure of tank diameter impeller according to claim 5, is characterized in that the wall thickness between the bosom, middle part of described direct neck and bead filler centre bore is not less than 10mm.
7. the repeated restorative procedure of tank diameter impeller according to claim 4, it is characterized in that described direct neck or both sides have the degree of depth be 0.5 ~ 1.5mm and angle at the groove of 60 ~ 90 °.
8. the repeated restorative procedure of the tank diameter impeller according to claim 1 or 4, is characterized in that the blade in described D step is straight plate vane.
9. the repeated restorative procedure of tank diameter impeller according to claim 1, also high-temperature annealing step is comprised after it is characterized in that described E step, described high-temperature annealing step is that the impeller entirety after being welded with bead filler by blade enters stove below 300 DEG C, be heated to 600 ~ 650 DEG C with stove and be incubated 2 ~ 4h, being then chilled to less than 300 DEG C air coolings of coming out of the stove with stove.
10. the repeated restorative procedure of the tank diameter impeller according to claim 1 or 9, dynamic balance calibration step is also comprised after it is characterized in that described E step, described dynamic balance calibration be by assembly welding after impeller find out the counterweight point of blade and the weight of counterweight through dynamic balance running, then obtain prewired counterweight after balance weight being deducted the welding rod weight of pre-welding, prewired counterweight pre-welding welding rod is soldered to the counterweight point of blade.
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| CN201510877498.4A CN105290707B (en) | 2015-12-04 | 2015-12-04 | A kind of repeatable restorative procedure of tank diameter impeller |
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| CN201510877498.4A CN105290707B (en) | 2015-12-04 | 2015-12-04 | A kind of repeatable restorative procedure of tank diameter impeller |
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| CN105290707B CN105290707B (en) | 2017-10-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105834668A (en) * | 2016-05-31 | 2016-08-10 | 上海祥贸实业有限公司 | Wear and corrosion resisting repair method for draught fan |
| CN106938381A (en) * | 2017-05-09 | 2017-07-11 | 登电集团新玉煤矿有限公司 | Coal winnowing machine fan blade restorative procedure |
| CN107627073A (en) * | 2017-09-19 | 2018-01-26 | 成都成发泰达航空科技有限公司 | A kind of repair method of stator blade |
| CN112276473A (en) * | 2020-10-21 | 2021-01-29 | 北京建工土木工程有限公司 | Spiral machine blade repairing method of shield machine |
| CN114083224A (en) * | 2021-11-26 | 2022-02-25 | 国网四川省电力公司映秀湾水力发电总厂 | Repair method for fixed guide vane of mixed-flow water turbine |
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| CN105834668A (en) * | 2016-05-31 | 2016-08-10 | 上海祥贸实业有限公司 | Wear and corrosion resisting repair method for draught fan |
| CN106938381A (en) * | 2017-05-09 | 2017-07-11 | 登电集团新玉煤矿有限公司 | Coal winnowing machine fan blade restorative procedure |
| CN107627073A (en) * | 2017-09-19 | 2018-01-26 | 成都成发泰达航空科技有限公司 | A kind of repair method of stator blade |
| CN112276473A (en) * | 2020-10-21 | 2021-01-29 | 北京建工土木工程有限公司 | Spiral machine blade repairing method of shield machine |
| CN114083224A (en) * | 2021-11-26 | 2022-02-25 | 国网四川省电力公司映秀湾水力发电总厂 | Repair method for fixed guide vane of mixed-flow water turbine |
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| CN105290707B (en) | 2017-10-13 |
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