CN101787984A - Forward skewed multi-blade impeller with narrow cavity and integral casting technique thereof - Google Patents
Forward skewed multi-blade impeller with narrow cavity and integral casting technique thereof Download PDFInfo
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- CN101787984A CN101787984A CN 201010100790 CN201010100790A CN101787984A CN 101787984 A CN101787984 A CN 101787984A CN 201010100790 CN201010100790 CN 201010100790 CN 201010100790 A CN201010100790 A CN 201010100790A CN 101787984 A CN101787984 A CN 101787984A
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Abstract
The invention relates to a forward skewed multi-blade impeller with a narrow cavity, which is used for a centrifugal fan and is low in noise, and an integral casting technique thereof. The impeller comprises a base plate and a hollow front plate, and narrow blades are installed along the circumference between the base plate and the front plate. The difference lies in that the blades are arc-shaped; the radial length of each blade is 20mm-30mm; the outlet height H of the meridian plane of each blade is 10mm-20mm; the number of the blades distributed along the circumference is 20-60; and the whole impeller is integrally cast. The impeller is compact in structure, low in noise, light in weight, high in structural strength and simple and convenient in maintenance. By adopting a moveable blade mold structure to fabricate an impeller inner core blank removing mold so as to finish the integral casting of the impeller, the invention solves the technical problem of blank removal failure of a closed impeller with a narrow cavity and has the advantages of high casting precision and good quality of the impeller, low casting cost and high production efficiency. The technique is widely applicable for integral casting of various multi-blade impellers, with the effect obviously better than that of similar products.
Description
Technical field
The present invention relates to a kind of centrifugal blower that is used for and possess the forward skewed multi-blade impeller with narrow cavity of low noise characteristic and the integral casting process of this impeller thereof.
Background technique
Centrifugal blower is widely used in industrial every field, and existing centrifugal blower guaranteeing under the maintainability prerequisite, just towards low noise, efficient, energy-saving multiple wing type centrifugal blower fan trend development.Wherein the low noiseization of blower fan more and more comes into one's own, and is especially in the naval vessel industry, more and more stricter to the noise and vibration index of blower fan.And impeller is the critical component of centrifugal blower, and the structural type of impeller and processing technology directly influence the every performance and the noise objective of blower fan.
Forward skewed multi-blade impeller with narrow cavity generally is used on the extraordinary centrifugal blower of high pressure, small flow more, as the filter blower fan, in low-noise centrifugal fan, use comparatively general, the quantity that the type blower fan is used on boats and ships such as naval vessels is more, relatively centralized arrangement is at the close quarters of personnel's work, activity, rest, therefore strict to the noise control ratio of the special-purpose centrifugal blower of the type, low noiseization is the development trend and the basic demand of the type blower fan.Yet because the restriction of its structural type characteristics and processing technique condition, the type blower fan mostly adopted the riveted joint combined impeller in the past, and its noise control device is limited, and noise objective can not satisfy the demand of blower fan development.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that exists at above-mentioned prior art and a kind of forward skewed multi-blade impeller with narrow cavity and integral casting forming technology thereof is provided that this impeller can be significantly improved and improve aspect structural strength and the vibration and noise reducing.
The technological scheme of forward skewed multi-blade impeller with narrow cavity of the present invention is: the shroud that includes basal disc and hollow, narrow type blade is circumferentially installed on the edge between basal disc and shroud, its difference is that described blade is curved, the blade radial length L is 20mm～30mm, blade meridian plane outlet height H is 10mm～20mm, circumferentially uniform 20～60 on blade edge, whole impeller integral casting moulding.
Press such scheme, described blade is a circular arc, and radian θ is Л/6～Л, and radius of curvature R is 10mm～30mm.
Press such scheme, described vane thickness δ is 1.5mm～3mm.
Press such scheme, described basal disc outer diameter D is 150mm～600mm, and blade is side end face laying Monday outside basal disc, the opposite side and the shroud of blade link, and shroud is hollow ring, and external diameter is identical with the basal disc external diameter, intake opening is offered in the centre, and intake opening diameter D1 is 50mm～200mm.
Press such scheme, described impeller is formed by aluminium alloy casting; Described basal disc middle part is provided with the impeller steel bushing, impeller steel bushing and basal disc edge integrator.
The technological scheme of integral casting forming technology of the present invention is:
Make casting of metals impeller sand mold mould, molten metal liquid injected impeller sand mold mould die cavity cast, cooling forming die sinking desanding the cast inblock impeller; Described impeller sand mold mould is by impeller gabarit sand mold mould and be installed in impeller inner core in the impeller gabarit sand mold mould die cavity and take off the embryo mould and form, its difference is that described impeller inner core takes off the embryo mould and is made by following steps: the moving vane model that at first processes monolithic, moving vane model height is higher than actual blade height, make the model basal disc of band blade perforation again, the moving vane model is inserted the interior location of model basal disc blade perforation respectively make impeller inner core core, put into the impeller core, and carry out the compacting of impeller inner core sand mold after putting into inner core cage bone, compacting finishes the back turn-over with the extraction one by one from the model basal disc of moving vane model, subsequently inner core is moulded adobe blocks, form the impeller inner core mould of moulding adobe blocks.
Press such scheme, the moving vane model of described monolithic processes with line cutting numerical control machine tool, and blade height is stretched out 20mm～40mm outside the model-based back-end disk plane, can be convenient to extract out.
Press such scheme, described model basal disc both ends of the surface band inner stopper, the movable reel of impeller shunting section model arc awl is revolved about by impeller in the end inner stopper that requirement is loaded on the model basal disc, lay the blade perforation in the card periphery of model basal disc, the blade perforation is 0.03mm～0.07mm with the matching gap of moving vane model.
Press such scheme, described moving vane model and model basal disc are made by steel.
Beneficial effect of the present invention is: 1, forward skewed multi-blade impeller with narrow cavity compact structure, the noise of employing integral casting forming are low, in light weight, structural strength is high, easy maintenance; Compare by the low-noise centrifugal ventilator with a large amount of same air power performance, airborne noise obviously reduces 3dB (A)～5dB (A); In 10Hz～10kHz scope, can be less than or equal 115dB under the condition that blower fan under-chassis vibration acceleration level elasticity is installed, well below like product.Simultaneously its structural strength is verified in the middle of the naval vessel environmental test, every test as vibration, impact, tilt to wave etc. that test is all disposable passes through, the fan performance index after the test does not change substantially.2, studies show that impeller material selects the aluminum alloy of damping noise-reducing better performances for use, can utilize the movable district of material crystal inside and the oscillation hysteresis loss effect that interior friction causes, make vibration mechanical energy be converted into heat energy, thereby reach the purpose of further reduction impeller noise.3, produce the impeller inner core with the moving vane model structure and take off the embryo mould, finish the cast inblock of impeller, solved the technical barrier that narrow chamber type, enclosed construction impeller can't the demouldings; Impeller casting accuracy height not only, quality is good, and the casting cost is low, the manufacturing efficiency height.Technology of the present invention can be widely used in the integral cast of various multiple-airfoil type impellers, and its airborne noise and vibration acceleration level control device are easy, and effect obviously is better than product of the same type.
Description of drawings
Fig. 1 is the positive view of impeller in the one embodiment of the invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the positive view of the impeller inner core core in the one embodiment of the invention.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the interior core positive view of the impeller in the one embodiment of the invention.
Fig. 6 is the impeller gabarit forming die front view in the one embodiment of the invention.
Fig. 7 takes off embryo pattern die front view for the making impeller inner core in the one embodiment of the invention.
Fig. 8 takes off embryo mould front view for the impeller inner core in the one embodiment of the invention.
Fig. 9 is an impeller gabarit sand mold mould front view of the present invention.
Figure 10 is the schematic representation of impeller sand mold mould of the present invention and casting.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The structure of forward skewed multi-blade impeller with narrow cavity of the present invention such as Fig. 1, shown in 2, include the shroud 2 of basal disc 4 and hollow, the basal disc outer diameter D is 235mm, narrow type blade 1 is circumferentially installed on the edge between basal disc and shroud, described blade is a circular arc, and radian θ is 2 Л/3, and radius of curvature R is 15mm, the blade radial length L is 28mm, blade meridian plane outlet height H is 16mm, and vane thickness δ is 2mm, and blade is along circumferentially uniform 26, each blade evenly forms narrow die cavity 5 at interval, the opposite side and the shroud of blade link, and shroud is hollow ring, and external diameter is identical with the basal disc external diameter, intake opening is offered in the centre, and intake opening diameter D1 is 142mm.Whole impeller is by the aluminum alloy integral casting forming; Described basal disc middle part is provided with the impeller shunting section arc awl and the impeller steel bushing 3 of projection forward, and impeller steel bushing and basal disc edge integrator are used for the connection with rotating shaft.
Integral casting forming technology of the present invention comprises the making and the casting of impeller sand mold mould, impeller is formed by the casting of impeller sand mold mould, Fig. 3～Figure 10 is for making the molded structural drawing of making the various moulds of process of impeller sand mold, and described impeller sand mold mould is by impeller gabarit sand mold mould and be installed in impeller inner core in the impeller gabarit sand mold mould die cavity and take off embryo mould 12 and form; Wherein impeller gabarit sand mold mould adopts the branch mailbox molding to be pressed into upper and lower sand mold die cavity 13,14 by impeller gabarit forming die 10 to constitute, as Fig. 6, shown in Figure 9; The impeller inner core takes off the embryo mould and is made by following steps: the moving vane model 6 that at first processes monolithic, the moving vane model of monolithic processes with line cutting numerical control machine tool, blade height is stretched out the outer 40mm of model basal disc 8 back Transverse planes, make the model basal disc 8 of band blade perforation again, described model basal disc both ends of the surface band inner stopper, with the movable reel 7 of impeller shunting section model arc awl by revolving about impeller in the end inner stopper that requirement is loaded on the model basal disc, lay the blade perforation in the card periphery of model basal disc, the blade perforation is 0.05mm with the matching gap of moving vane model, the moving vane model is inserted the interior location of model basal disc blade perforation respectively make impeller inner core core, as Fig. 3, shown in Figure 4, described moving vane model and model basal disc are made by steel.Again impeller inner core core is put into impeller core 9, and carry out the compacting of impeller inner core sand mold after putting into inner core cage bone 11, compacting finishes the back turn-over with the extraction one by one from the model basal disc of moving vane model, subsequently inner core is moulded adobe blocks, form the impeller inner core mould of moulding adobe blocks, as Fig. 5, Fig. 7, shown in Figure 8.Place impeller gabarit sand mold mould die cavity promptly to constitute the impeller sand mold mould that can be used for casting of metals the impeller inner core of making 12 moulds of moulding adobe blocks, as shown in figure 10.Molten metal liquid is injected impeller sand mold mould die cavitys from casting gate 15 casts, cooling forming die sinking desanding the cast inblock impeller.
Claims (9)
1. forward skewed multi-blade impeller with narrow cavity, include the shroud of basal disc and hollow, narrow type blade is circumferentially installed on the edge between basal disc and shroud, it is characterized in that described blade is curved, the blade radial length L is 20mm～30mm, blade meridian plane outlet height H is 10mm～20mm, circumferentially uniform 20～60 on blade edge, whole impeller integral casting moulding.
2. by the described forward skewed multi-blade impeller with narrow cavity of claim 1, it is characterized in that described blade is a circular arc, radian θ is Л/6～Л, and radius of curvature R is 10mm～30mm.
3. by claim 1 or 2 described forward skewed multi-blade impeller with narrow cavity, it is characterized in that described vane thickness δ is 1.5mm～3mm.
4. by claim 1 or 2 described forward skewed multi-blade impeller with narrow cavity, it is characterized in that described basal disc outer diameter D is 150mm～600mm, blade is side end face laying Monday outside basal disc, the opposite side and the shroud of blade link, shroud is hollow ring, external diameter is identical with the basal disc external diameter, and intake opening is offered in the centre, and intake opening diameter D1 is 50mm～200mm.
5. by the described forward skewed multi-blade impeller with narrow cavity of claim 1, it is characterized in that described impeller is formed by the aluminum alloy cast inblock; Described basal disc middle part is provided with the impeller steel bushing, impeller steel bushing and basal disc edge integrator.
6. described forward skewed multi-blade impeller with narrow cavity integral casting process of claim 1 is made casting of metals impeller sand mold mould, molten metal liquid is injected impeller sand mold mould die cavity casts, cooling forming die sinking desanding the cast inblock impeller; Described impeller sand mold mould is by impeller gabarit sand mold mould and be installed in impeller inner core in the impeller gabarit sand mold mould die cavity and take off the embryo mould and form, it is characterized in that described impeller inner core takes off the embryo mould and is made by following steps: the moving vane model that at first processes monolithic, moving vane model height is higher than actual blade height, make the model basal disc of band blade perforation again, the moving vane model is inserted the interior location of model basal disc blade perforation respectively make impeller inner core core, put into the impeller core, and carry out the compacting of impeller inner core sand mold after putting into inner core cage bone, compacting finishes the back turn-over with the extraction one by one from the model basal disc of moving vane model, subsequently inner core is moulded adobe blocks, form the impeller inner core mould of moulding adobe blocks.
7. by the described forward skewed multi-blade impeller with narrow cavity integral casting process of claim 6, it is characterized in that the moving vane model of described monolithic processes with line cutting numerical control machine tool, blade height is stretched out 20mm～40mm outside the model-based back-end disk plane.
8. by claim 6 or 7 described forward skewed multi-blade impeller with narrow cavity integral casting process, it is characterized in that described model basal disc both ends of the surface band inner stopper, the movable reel of impeller shunting section model arc awl is revolved about by impeller in the end inner stopper that requirement is loaded on the model basal disc, lay the blade perforation in the card periphery of model basal disc, the blade perforation is 0.03mm～0.07mm with the matching gap of moving vane model.
9. by claim 6 or 7 described forward skewed multi-blade impeller with narrow cavity integral casting process, it is characterized in that described moving vane model and model basal disc made by steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010100790 CN101787984B (en) | 2010-01-22 | 2010-01-22 | Forward skewed multi-blade impeller with narrow cavity and integral casting technique thereof |
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| CN 201010100790 CN101787984B (en) | 2010-01-22 | 2010-01-22 | Forward skewed multi-blade impeller with narrow cavity and integral casting technique thereof |
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| CN101787984A true CN101787984A (en) | 2010-07-28 |
| CN101787984B CN101787984B (en) | 2012-08-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425573A (en) * | 2011-12-14 | 2012-04-25 | 中国舰船研究设计中心 | Low-noise forward multi-wing centrifugal blower |
| CN102586834A (en) * | 2012-03-19 | 2012-07-18 | 北京航空航天大学 | Preparation method and application of transparent titanium dioxide nanotube film |
| CN107269580A (en) * | 2017-07-26 | 2017-10-20 | 广东顺威精密塑料股份有限公司 | A kind of cost-efficiently tubular wine wheel |
| CN108014545A (en) * | 2016-11-03 | 2018-05-11 | 金华市乾元机械制造有限公司 | A kind of dedusting and purifying device |
| CN111136217A (en) * | 2020-03-05 | 2020-05-12 | 无锡市灵通铸造有限公司 | Casting process of generator impeller |
| CN111894897A (en) * | 2020-08-06 | 2020-11-06 | 佛山市南海区绿智电机设备有限公司 | Impeller for centrifugal fan and preparation equipment and preparation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2133678Y (en) * | 1992-08-19 | 1993-05-19 | 湖南省邵阳工业专科学校 | Centrifugal cooling fan for miniature wind-cooling diesel engine |
| CN2809291Y (en) * | 2005-07-04 | 2006-08-23 | 袁继荣 | Impeller of integrated forward curved multi-blade centrifugal fan |
| CN1326646C (en) * | 2005-12-13 | 2007-07-18 | 遵义拓特铸锻有限公司 | Vacuum pump impeller integral casting process |
| CN201225318Y (en) * | 2008-06-23 | 2009-04-22 | 金莱克电气股份有限公司 | Motor fan of dust collector |
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2010
- 2010-01-22 CN CN 201010100790 patent/CN101787984B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425573A (en) * | 2011-12-14 | 2012-04-25 | 中国舰船研究设计中心 | Low-noise forward multi-wing centrifugal blower |
| CN102586834A (en) * | 2012-03-19 | 2012-07-18 | 北京航空航天大学 | Preparation method and application of transparent titanium dioxide nanotube film |
| CN102586834B (en) * | 2012-03-19 | 2015-01-07 | 北京航空航天大学 | Preparation method and application of transparent titanium dioxide nanotube film |
| CN108014545A (en) * | 2016-11-03 | 2018-05-11 | 金华市乾元机械制造有限公司 | A kind of dedusting and purifying device |
| CN107269580A (en) * | 2017-07-26 | 2017-10-20 | 广东顺威精密塑料股份有限公司 | A kind of cost-efficiently tubular wine wheel |
| CN111136217A (en) * | 2020-03-05 | 2020-05-12 | 无锡市灵通铸造有限公司 | Casting process of generator impeller |
| CN111894897A (en) * | 2020-08-06 | 2020-11-06 | 佛山市南海区绿智电机设备有限公司 | Impeller for centrifugal fan and preparation equipment and preparation method thereof |
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| Publication number | Publication date |
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| CN101787984B (en) | 2012-08-22 |
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