CN103611875A - Impeller air-lock valve impeller rotor production process - Google Patents
Impeller air-lock valve impeller rotor production process Download PDFInfo
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- CN103611875A CN103611875A CN201310481589.7A CN201310481589A CN103611875A CN 103611875 A CN103611875 A CN 103611875A CN 201310481589 A CN201310481589 A CN 201310481589A CN 103611875 A CN103611875 A CN 103611875A
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- impeller
- vane rotor
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Abstract
The invention relates to an impeller air-lock valve impeller rotor production process, which comprises: processing a core shaft blank, manufacturing a blade sand core, a bottom box and a cover box, enclosing the blade sand core into a casting cavity, arranging the casting cavity on the bottom box, pressing and covering the cover box on the blade sand core, heating the core shaft blank, inserting the heated core shaft blank into the casting cavity, casting, and cooling. According to the present invention, the process has characteristics of simple method and convenient operation, the prepared impeller has high size precision, is firmly combined with the steel core shaft, and has good comprehensive mechanical property, and the blades have good wear resistance; the core shaft has sufficient tensile strength and bending deformation resistance strength, the manufacturing precision completely meets the service performance requirement of the impeller rotor, and the processing difficulty of the impeller rotor is substantially reduced; and the production process of the present invention can be adopted to replace the processing process of the impeller air-lock valve impeller rotor in the existing various types of powder, dust, granular material unloading equipment, and is suitable for industrial production.
Description
Technical field
The present invention relates to the Impeller airlock in wind-force conveying and dust removal by ventilation equipment, refer to especially a kind of vane rotor production technology of Impeller airlock, belong to wind-force and carry and dust removal by ventilation equipment preparing technical field.
Background technology:
Impeller airlock is the capital equipment of cleaner ash discharge, air-supply and miscellaneous equipment feed, is applicable to granular material and granulated material; Normally by the impeller of rotor with several pieces blades, housing, the compositions such as seal.The scope of application is extensive, is the industrial department extensive uses such as environmental protection, metallurgy, chemical industry, grain, food.The processing technology requirement of vane rotor, vane rotor is when rotating, between rotor outer circle and casing endoporus and the gap of rotor end-face and end cap plane is the smaller the better, the bearing position at General Requirements vane rotor two ends and the axiality of blade cylindrical are in 0.025mm, and the end face run-out at two ends is in 0.03mm.Therefore, requirement on machining accuracy is higher.
Conventional impellers rotor production technology has two kinds:
A kind of is with machined again after steel plate installed-welded.This kind of vane rotor that production technology is produced, adopts welding procedure to be linked to be an integral body between mandrel and impeller, because of the effect of welding stress and Machining stress, impeller can produce distortion.The form and position tolerance producing for reducing impeller distortion, conventionally adopt special tooling to calibrate, even like this, also usually can not meet the requirement of impeller size precision, in production, employing suitably reduces impeller outer diameter size conventionally, and the preset clearance of impeller and casing is increased, its gap is generally at 0.08mm, to meet the normal operation of impeller in housing.This processing technology can not meet the requirement to vane rotor machining accuracy, causes wind stopping device air-tightness variation, and then affects product quality and discharging performance.
Another kind method is that impeller adopts iron casting, reserved centre bore, then, the steel mandrel that machined is put in place adopts the mode of interference fit to be inlaid in the reserved centre bore of impeller, the Impeller airlock that this method is produced, due to steel mandrel and cast iron impeller employing interference fit, required precision is high, and tension can make cast iron impeller cracking, cross pine, mandrel can skid, and causes quality unstable, and yields is low.Although, employing key or spline are realized radially and axial location is the routine selection of this area, but because key or spline are realized radially and during axial location, its radial dimension is conventionally reserved larger, when vane rotor high-speed cruising, be difficult to meet the requirement of vane rotor end face run-out dimensional accuracy, therefore, conventionally do not adopt in the industry key or spline to carry out radially and axial location vane rotor.
Summary of the invention:
The object of the invention is to overcome the deficiency of prior art and provide that a kind of process is simple, easy to operate, high, the impeller of impeller size precision of preparation is combined the firmly vane rotor production technology of Impeller airlock with steel mandrel.
The vane rotor production technology of a kind of Impeller airlock of the present invention, comprises the steps:
The first step: mandrel preformed
According to the mandrel size of design, press length direction, monolateral each the reserved allowance of diametric(al), processing mandrel blank, place, centre position along mandrel blank axis direction, the diameter of mandrel blank is less, forms 2 relative shaft shoulders, on mandrel blank on the mandrel blank between 2 shaft shoulders, be provided with at least 2 through holes, the axis of adjacent through-holes is not parallel;
Second step: the preparation of mold
Impeller casting mold die cavity is comprised of N blade sand core combination and under casing, top box, and under casing, top box, blade sand core all adopt water-glass sand type processed; Blade sand core divides core type processed by vertical casting mode according to axis of runner blade, and under casing, top box, blade sand core type processed rear surface brushing alcohol radical graphite paint are also dried; Alcohol radical graphite paint is the cast iron alcohol radical graphite paint that Changsha heavenly steed founding materials factory produces, it is graphite powder that the group of alcohol radical graphite paint is wanted component, has added respectively and account for the phenolic resins of graphite powder quality 4-6%, the calcium-base bentonite of 6-8%, 0.2% polyvinyl butyral in graphite powder;
The 3rd step: mould assembling
The N of a second step gained blade sand core is enclosed to casting mold die cavity by the diameter of axle of the shaft shoulder on mandrel blank and be arranged under casing, blade sand core surrounding is enclosed case with water-glass sand, adopts carbon dioxide hardening, makes blade sand core form an integral body; In blade sand core bottom, anti-rain type Circular Pouring System is set; Then, top box gland, in blade sand core, is completed to mould assembling;
The 4th step: casting
Mandrel blank is heated to 430-480 ℃, insulation 1-1.5h, then, in the casting mold die cavity that insertion is enclosed by blade sand core, after the compacting of location, the cast iron water of fusing is poured in casting mold die cavity by anti-rain type Circular Pouring System, cooling, obtain the vane rotor crude green body of Impeller airlock.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the N in a described N blade sand core, determines: according to blade quantity, adopt vertical casting, by axis of runner blade, divide core type processed, the quantity of minute core type processed is N by the following method.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the vane rotor crude green body of the Impeller airlock of preparation is through 860-880 ℃, be incubated air cooling after normalizing in 1.5-2.5 hour, be machined into after design size, Shot Blasting, obtain the vane rotor of Impeller airlock.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the reserved allowance of mandrel blank is 2-6mm.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the height D of the described shaft shoulder is 3-8mm, the distance L between the shaft shoulder is than the little 8-12mm of the length H of impeller.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the diameter of described through hole is Ф 8-12mm.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the axis of adjacent through-holes is 90 °.
The vane rotor production technology of a kind of Impeller airlock of the present invention, under casing, top box adopt 40-70 order water-glass sand type processed, and blade sand core adopts 70-100 order water-glass sand type processed.
The vane rotor production technology of a kind of Impeller airlock of the present invention, described mandrel is selected 45 steel or 35 steel; Described impeller is selected HT200 iron casting.
The vane rotor production technology of a kind of Impeller airlock of the present invention, the vane rotor bearing of the Impeller airlock of preparation and the axiality of blade cylindrical are in 0.025mm, and the end face run-out at mandrel two ends is in 0.03mm.
The present invention, owing to adopting above-mentioned process, according to cast iron impeller production process feature, utilizes imbedding process feature, by roughwrought steel mandrel castingin in cast iron impeller, make it into as a wholely, make the material of two kinds of unlike materials, by casting imbedding process feature, be integrated into one.The uneven through hole of axis is set on mandrel, make to have formed between impeller and mandrel the structure that the reinforcement that consists of cast iron and mandrel are inlayed, at impeller and the cast iron forming between mandrel, further realize mechanical rigidity combination with on basis that steel matrix castingin is combined, effectively promoted the bond strength between impeller and mandrel.By mandrel is preheated to 430-480 ℃, on the one hand, can remove the greasy dirt on axle surface; On the other hand, can make axle produce certain thermal expansion amount, in the metal liquid solidification process after cast, can offset part shrinkage stress, reduce the probability that impeller hub produces contraction crack; Again on the one hand, the temperature difference of the mandrel after preheating and cast iron water reduces, after casting, cast iron water further makes the temperature of mandrel raise, thereby, be conducive to ferroalloy liquid and axle and fully merge, effectively promote the syncretizing effect of castingin process axle and cast iron impeller, axle and cast iron impeller are tightly encased and form an integral body.The heat treatment normalizing process carrying out subsequently, impeller position HT cast iron, its matrix is pearlite+ferrite, the anti-wear performance with good comprehensive mechanical performance, particularly blade improves a lot; Its axle also has good comprehensive mechanical performance and processing characteristics.The vane rotor that adopts the inventive method to prepare, because adopting casting technique, blade carries out essence casting, its geomery can reach designing requirement completely, and mandrel forms firmly cast iron between blade, is combined is combined with mechanical rigidity with steel matrix castingin, and bond strength is good; Mandrel adopts mild steel and leaves allowance, is applicable to very much finish turning processing, meets serviceability completely and require and required precision after machine finishing.Both reach the object that improves impeller abrasion-proof, and made again mandrel there is the bent deformation intensity of enough stretching-resisting bending-resistings, met the military service performance requirement of vane rotor.The difficulty of processing that greatly reduces vane rotor, has improved product quality.
In sum, process of the present invention impeller size precision simple, easy to operate, preparation is high, impeller is combined firmly with steel mandrel, and impeller has good comprehensive mechanical performance, and blade has good anti-wear performance; Mandrel has the bent deformation intensity of enough stretching-resisting bending-resistings, the accuracy of manufacture has met the military service performance requirement of vane rotor completely, greatly reduce the difficulty of processing of vane rotor, the processing technology of the Impeller airlock vane rotor in the delivery device of replaceable existing all kinds of powder, dirt, pellet, is suitable for suitability for industrialized production.
Accompanying drawing explanation
The vane rotor structural representation that accompanying drawing 1 is prepared for the present invention.
In figure, 1-blade, 2-impeller shaft hole, 3-shaft shoulder, 4-mandrel, 5-through hole.
Embodiment:
The vane rotor of preparing Impeller airlock, largest contours size: impeller diameter Φ 250mm, impeller length H282mm, mandrel shaft shoulder diameter of phi 55mm, mandrel length 506mm, impeller material: HT200; Axle material: 35# steel; Casting weight 18Kg.
Its production technology, comprises the steps:
The first step: mandrel preformed
According to the mandrel size of design, press length direction, monolateral each the reserved allowance 4mm of diametric(al), process mandrel blank, obtain being of a size of the mandrel blank of Φ 63*514mm, at the place, centre position of mandrel blank axis direction, the diameter of mandrel blank is machined to Φ 45*272mm, on mandrel blank, form 2 relative shaft shoulders, now, the height of the shaft shoulder is 9mm, distance L between the shaft shoulder is 272mm, and this distance L is than the little 10mm of the length H282mm of impeller; On the mandrel blank between 2 shaft shoulders, be provided with the through hole that 4 diameters are Ф 10mm, the axis of adjacent through-holes is mutually vertical;
Second step: the preparation of mold
Impeller casting mold die cavity is comprised of 6 blade sand core combinations and under casing, top box, and under casing, top box adopt 40-70 order water-glass sand type processed, and blade sand core adopts 70-100 order water-glass sand type processed; Blade sand core divides core type processed by vertical casting mode according to axis of runner blade, and under casing, top box, blade sand core type processed rear surface brushing alcohol radical graphite paint are also dried; Alcohol radical graphite paint is the cast iron alcohol radical graphite paint that Changsha heavenly steed founding materials factory produces, it is graphite powder that the group of alcohol radical graphite paint is wanted component, has added respectively and account for the phenolic resins of graphite powder quality 4-6%, the calcium-base bentonite of 6-8%, 0.2% polyvinyl butyral in graphite powder;
The 3rd step: mould assembling
6 blade sand core of second step gained are enclosed to casting mold die cavity by the diameter of axle Φ 63mm of the shaft shoulder on mandrel blank and be arranged under casing, blade sand core surrounding is enclosed case with water-glass sand, adopts carbon dioxide hardening, makes blade sand core form an integral body; In blade sand core bottom, anti-rain type Circular Pouring System is set; Then, top box gland, in blade sand core, is completed to mould assembling;
The 4th step: casting
Mandrel blank is heated to 450-460 ℃, insulation 1.5h, then; in the casting mold die cavity that insertion is enclosed by blade sand core, after the compacting of location, the HT200 cast iron water of fusing is poured in casting mold die cavity by anti-rain type Circular Pouring System; cooling, obtain the vane rotor crude green body of Impeller airlock; The vane rotor crude green body of the Impeller airlock of preparation is through 860-880 ℃, be incubated air cooling after normalizing in 2 hours, be machined into after design size, Shot Blasting, obtain the vane rotor of Impeller airlock, now, mandrel is of a size of: Φ 55*508mm, shaft shoulder height D is 5mm.
The vane rotor of Impeller airlock prepared by the present embodiment is measured through real-world operation, and the axiality of bearing and blade cylindrical is in 0.025mm, and the end face run-out at mandrel two ends is in 0.03mm.
Claims (9)
1. a vane rotor production technology for Impeller airlock, comprises the steps:
The first step: mandrel preformed
According to the mandrel size of design, press length direction, monolateral each the reserved allowance of diametric(al), processing mandrel blank, place, centre position along mandrel blank axis direction, the diameter of mandrel blank is less, forms 2 relative shaft shoulders, on mandrel blank on the mandrel blank between 2 shaft shoulders, be provided with at least 2 through holes, the axis of adjacent through-holes is not parallel;
Second step: the preparation of mold
Impeller casting mold die cavity is comprised of N blade sand core combination and under casing, top box, and under casing, top box, blade sand core all adopt water-glass sand type processed; Blade sand core divides core type processed by vertical casting mode according to axis of runner blade, and under casing, top box, blade sand core type processed rear surface brushing alcohol radical graphite paint are also dried;
The 3rd step: mould assembling
The N of a second step gained blade sand core is enclosed to casting mold die cavity by the diameter of axle of the shaft shoulder on mandrel blank and be arranged under casing, blade sand core surrounding is enclosed case with water-glass sand, adopts carbon dioxide hardening, makes blade sand core form an integral body; In blade sand core bottom, anti-rain type Circular Pouring System is set; Then, top box gland, in blade sand core, is completed to mould assembling;
The 4th step: casting
Mandrel blank is heated to 430-480 ℃, insulation 1-1.5h, then, in the casting mold die cavity that insertion is enclosed by blade sand core, after the compacting of location, the cast iron water of fusing is poured in casting mold die cavity by anti-rain type Circular Pouring System, cooling, obtain the vane rotor crude green body of Impeller airlock.
2. the vane rotor production technology of a kind of Impeller airlock according to claim 1, it is characterized in that: the vane rotor crude green body of the Impeller airlock of preparation is through 860-880 ℃, be incubated air cooling after normalizing in 1.5-2.5 hour, be machined into after design size, Shot Blasting, obtain the vane rotor of Impeller airlock.
3. the vane rotor production technology of a kind of Impeller airlock according to claim 1, is characterized in that: the reserved allowance of mandrel blank is 2-6mm.
4. the vane rotor production technology of a kind of Impeller airlock according to claim 1, is characterized in that: the height d of the described shaft shoulder is 3-8mm, and the distance L between the shaft shoulder is than the little 8-12mm of the length H of impeller shaft hole.
5. the vane rotor production technology of a kind of Impeller airlock according to claim 1, is characterized in that: the diameter of described through hole is Ф 8-12mm.
6. the vane rotor production technology of a kind of Impeller airlock according to claim 5, is characterized in that: the axis of adjacent through-holes is 90 °.
7. the vane rotor production technology of a kind of Impeller airlock according to claim 1, is characterized in that: under casing, top box adopt 40-70 order water-glass sand type processed, and blade sand core adopts 70-100 order water-glass sand type processed.
8. the vane rotor production technology of a kind of Impeller airlock according to claim 1, is characterized in that: described mandrel is selected 45 steel or 35 steel; Described impeller is selected HT200 iron casting.
9. according to the vane rotor production technology of a kind of Impeller airlock described in claim 1-8 any one, it is characterized in that: the vane rotor bearing of the Impeller airlock of preparation and the axiality of blade cylindrical are in 0.025mm, and the end face run-out at mandrel two ends is in 0.03mm.
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| CN201310481589.7A CN103611875A (en) | 2013-10-15 | 2013-10-15 | Impeller air-lock valve impeller rotor production process |
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| CN201310481589.7A CN103611875A (en) | 2013-10-15 | 2013-10-15 | Impeller air-lock valve impeller rotor production process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962511A (en) * | 2014-05-13 | 2014-08-06 | 淄博华成泵业有限公司 | Manufacturing method of integral impeller sand core |
| CN106734938A (en) * | 2016-11-30 | 2017-05-31 | 安徽应流集团霍山铸造有限公司 | A kind of method that core is made with carbon dioxide hardening resin |
| CN107746923A (en) * | 2017-11-30 | 2018-03-02 | 江苏沃得机电集团有限公司 | Spheroidal graphite cast-iron casts processing method |
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Application publication date: 20140305 |