CN104594962B - A kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material - Google Patents
A kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material Download PDFInfo
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- CN104594962B CN104594962B CN201410790437.XA CN201410790437A CN104594962B CN 104594962 B CN104594962 B CN 104594962B CN 201410790437 A CN201410790437 A CN 201410790437A CN 104594962 B CN104594962 B CN 104594962B
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Abstract
The present invention discloses a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material, specifically comprise flow channel component, discharge case body assembly and positioning component, discharge case body assembly taking upper runner plane decided at the higher level but not officially announced as benchmark and flow channel component integrally welded, positioning component taking the interior locating surface of lower flow channel as benchmark and flow channel component integrally welded, form welded type spiral casing of pressure booster. Above-mentioned three assemblies are integral by some weld parts. And the thickness of spiral case and high-termal conductivity have determined that this spiral case has relatively low complete wet number in the present invention, adopt the circular rector principle design spiral case molded line such as not, adopt thin walled welds technological forming. The present invention is simple in structure, lightweight, has met the light-weighted requirement of aviation; Response to variations in temperature is fast, has lower temperature hysteresis and thermal inertia; Change traditional turbine volute etc. circular rector pneumatic design be the circular rector design such as not, to revising in the turbine inlet cross section of the circular rector spiral cases such as thermal insulation, reduced the pneumatic inertia of turbine.
Description
Technical field
The invention belongs to aviation piston engine turbo-charger technical field, be specifically related to the low of a kind of thin-wall stainless steel materialFinish wet several welded types circular rector spiral case such as not.
Background technology
Turbine volute is the vitals that aviation piston engine is used, and the high-temp waste gas that aero-engine is discharged is in spiral casing flow passageThe acting of promotion turbine, the material of spiral case, structure, efficiency, the reliability of flow channel shape on booster have important impact.Spiral case operating temperature is between 1100 DEG C-1300 DEG C, and therefore the material of turbine volute will have good heat resistance and anti-flame oxygenChange ability. The Main Load major part of bearing due to turbocharger passes to turbine volute by bearing body, therefore require itThere is good mechanical strength. The flow channel shape complexity of turbine volute, local housing wall is thinner, to the forming method of material andMachinability also has higher requirements. In addition, structure lightweight is the target that Aeroengine Design is pursued always.
Complex-shaped due to aviation spiral casing of pressure booster, especially runner face mostly is free form surface, and therefore, existing spiral case is largeAll adopt the mode of casting, as sand casting or gravity-type metal casting. Material selection aspect, is ensureing to meet intensityUnder the prerequisite requiring, taking the relatively good austenitic heat resistant cast steel of casting character as main. Although cast type spiral case has mechanicalnessCan good, high reliability, but Shortcomings in the following areas:
1. weight is large. Although cast steel belongs to the good Steel material of casting character, compared with the metal material such as iron, aluminium, metal flowMoving performance is relatively poor, and casting character still has larger gap. Therefore, the cast type spiral case wall thickness taking heat resisting cast steel as materialGreatly, overall weight is higher, does not meet the light-weighted requirement of aviation.
2. moulding difficulty is high. Because metal fluidity and the casting character of cast steel material are poor, cause the moulding difficulty of spiral case higher,At processability of product structure design aspect, be main mainly with simple shape, the structure that is easy to moulding, it is excessively thin that wall thickness also should not design,The design space of spiral case is less, exists certain limitation.
3. the construction cycle is longer. Because cast type spiral case moulding difficulty is high, casting mould design difficulty is larger, need to be through repeatedlyAmendment and test just can complete final Design of Dies.
4. thermal inertia is high. Inner flow passage is complex-shaped, casting difficulty height has determined that cast type spiral case can only adopt thick-walled structure, thusBrought and finished the problem that wet number is high, thermal inertia is high, compared with thin-walled spiral case, spiral case temperature raises or reduces identical temperature instituteTake time longer.
In recent years, fast mould technology and the fast development of thin-wall stainless steel solder technology. Fast mould technology is that use can be freeThe instrument of change shape is not very complicated part rapid shaping to having definite shape, structure, and this technology can significantly contractThe cycle of short mould development; Thin-wall stainless steel solder technology is taking the low carbon stainless steel such as 304H, 316H material as mother metal, adoptsBy the welding method of argon arc welding, the corrosion resistant plate of thin-walled is completed the forming method of welding. This welding method makes the resistance to of heat affected areaHigher, the ardent rate of corrosivity is lower, weldquality is higher. But up to now, there is not yet above two kinds of technology and be applied to increasingThe report of depressor spiral case manufacture view.
Summary of the invention
The present invention is directed to the deficiency of cast type spiral case in aviation booster application aspect, the present invention proposes a kind of thin-wall stainless steel materialLow wet several welded types circular rector spiral case such as or not finishing of material, meets simple in structure, lightweight, high reliability, aerospace seal performance is goodThe designing requirement of aviation piston engine booster.
Low wet several welded types circular rector spiral case such as or not finishing of a kind of thin-wall stainless steel material of the present invention, comprises outside flow channel component, outletHousing unit and positioning component.
Wherein, flow channel component comprises upper runner housing, lower flow channel housing and suction flange. Upper runner housing and lower flow channel housingIntegrally welded, form spiral casing flow passage; Suction flange is directly welded in the inlet end face of spiral casing flow passage, forms runner seamPart; Position near spiral casing flow passage import in above-mentioned flow channel component is provided with air vent.
Discharge case body assembly by shell body, vent valve matrix, export special-shaped flange and spiral case outlet housing and form; Wherein,Shell body sidewall has vent valve installing hole. Vent valve matrix, as the carrier of vent valve, is welded on vent valve installing hole place;Spiral case outlet housing is gradual change contraction mouth tubular structure, and cross sectional shape is straight line from arc transition. Spiral case outlet housing is welded onShell body bottom; Export special-shaped flange welding case top outside; Above-mentioned discharge case body assembly bottom is with in flow channel componentThe interior locating surface of runner housing is benchmark, integrally welded with flow channel component, makes to export shell body assembly near spiral casing flow passage,Outlet Special-shaped flange is away from spiral casing flow passage.
Positioning component is made up of axial location plate, radial set collar and blowdown pipe; Radial set collar is reserved with the location of blowdown pipeHole. Radial set collar external cylindrical surface is reserved with locating slot, locating slot be connected with radial set collar as axial location axially andRadial location benchmark, and then after axial location plate is accurately located by locating slot and radial set collar, coaxial and radial locationEncircle integrally welded; Positioning component taking the interior locating surface of lower flow channel housing in flow channel component as benchmark and flow channel component be welded into oneBody.
The present invention contrasts prior art, and advantage is:
(1) worm frame of the present invention is simple, lightweight. Compared with casting, welding fabrication does not have for the thickness of spiral caseToo high requirement, under the prerequisite that ensures structural strength, thickness can suitably reduce, and the welded type spiral case with identical runner is comparedCast type spiral case weight can reduce by 40%-50%, has met the light-weighted requirement of aviation;
(2) spiral case moulding difficulty of the present invention is low. Compared with casting, the punch forming of single-piece or fast mould moulding andThe difficulty of the welding fabrication of assembly obviously reduces, and can design as required the structure of relative complex.
(3) the spiral case construction cycle of the present invention is short. By fast mould assistant formation, can make to be accomplished to product from design and processThe manufacturing cycle becoming shortened in one week, had significantly shortened the construction cycle of spiral casing of pressure booster product.
(4) spiral case thermal inertia of the present invention is low. Thin-wall stainless steel spiral case is compared with heavy wall heat resisting cast steel spiral case, to variations in temperatureResponse is fast, and, with under gas source condition, spiral case is heated to uniform temp by high-temperature fuel gas, and the former required time is shorter than the latter, heatInertia is low. Under equivalent technology condition, the turbine efficiency of being furnished with the booster of thin-wall stainless steel spiral case will be higher than being furnished with heat-resisting castingThe booster of steel spiral case.
(5) spiral case of the present invention is easy to remodeling. Welded type spiral case has good convenience in the time of structural modification, will need amendmentSolder joint corresponding to part open after, amended part is replaced to former part and again welds in corresponding position.
Brief description of the drawings
Fig. 1 is the three-dimensional partial cross sectional views of spiral case of the present invention;
Fig. 2 is flow channel component structural representation.
In figure:
1-flow channel component 2-discharge case body assembly 3-positioning component
101-upper runner housing 102-lower flow channel housing 103-suction flange
104-air vent 201-shell body 202-vent valve matrix
203-exports special-shaped flange 204-spiral case outlet housing 301-axial location plate
302-radial set collar 303-blowdown pipe
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Low wet several welded types circular rector spiral case such as or not finishing of a kind of thin-wall stainless steel material of the present invention, adopts thin-wall stainless steelLow wet several welded types circular rector spiral case such as or not finishing of material, comprises flow channel component 1, discharge case body assembly 2 and positioning component 3,As shown in Figure 1.
Wherein, flow channel component 1 comprises upper runner housing 101, lower flow channel housing 102 and suction flange 103, as shown in Figure 2;Upper runner housing 101 and lower flow channel housing 102 flange form after interior locating surface integrally welded, form spiral casing flow passage, importFlange 103 is directly welded in the inlet end face of spiral casing flow passage, forms runner soldering member. Close snail in above-mentioned flow channel component 1The position of shell runner import is provided with air vent 104.
Traditional spiral case Profile Design mainly contains two kinds: a kind of is to be the circumferential average speed of normal value hypothesis based on speed in spiral caseMethod, the spiral case molded line designing by this method is a spiral of Archimedes; One be based on etc. circular rector method orBe called the spiral case that uniform velocity moments method designs, the spiral case molded line designing by this method is a logarithm spiralLine. And the present invention ensures that the gas moment of momentum of each turbo blade porch equates, remainder is the circular rector such as not, passes throughThe spiral case molded line that this method designs is a matching SPL.
Traditional volute type line design method is taking gas thermal insulation in spiral case as prerequisite, volute type line design method in the present inventionConsider the problem of the interior gas of spiral case and spiral case heat exchange, in order to improve the sensitivity of turbine to gaseous state reacting condition in spiral caseDegree, needs spiral case to try one's best and few gas in spiral case is carried out to heat exchange, is convenient to the state and the interior gas of spiral case of turbo blade porchThe servo-actuated property of state variation is good.
In order to improve the servo-actuated property that in the state of turbo blade porch and spiral case, gaseous state changes, need to reduce spiral case and snailThe heat exchange of gas in shell. By optimizing the complete wet number (0.01～0.05) of spiral case, reduce total thermal capacity of spiral case, known needsThe volume of spiral case is down to minimum in rational scope, is now meeting under the prerequisite of spiral case pardon, adopts thin-walled turbine snailShell can be realized this requirement. Through calculation and test checking, the wall thickness of thin-walled spiral case is generally comparatively suitable at 2-4mm, thisThe quality of planting thin-walled spiral case can reduce by 50 percent left and right than the quality of the common spiral case of same model.
In addition, in spiral case, between gas and spiral case, there is heat exchange, can cause gas flowfield in spiral case to change, therefore, thisInvention has also been carried out Area Compensation to the cross section of spiral case.
Discharge case body assembly 2 by shell body 201, vent valve matrix 202, export special-shaped flange 203 and spiral case outlet housing204 form. Wherein, shell body 201 sidewalls have vent valve installing hole; Vent valve matrix 202 is as the carrier of vent valve,Be welded on vent valve installing hole place, be used for installing as required vent valve, to prevent booster excess revolutions. Spiral case outlet housing 204For gradual change contraction mouth tubular structure, cross sectional shape is straight line from arc transition; Spiral case outlet housing 204 is welded on shell body 201Bottom; Export special-shaped flange 203 and be welded on shell body 201 tops, form discharge case body soldering member. Above-mentioned discharge caseBody assembly 2 bottoms, taking the interior locating surface of upper runner housing 101 in flow channel component 1 as benchmark, are welded into one with flow channel component 1Body, makes to export shell body assembly 2 near spiral casing flow passage, and outlet Special-shaped flange 203 is away from spiral casing flow passage. Above-mentioned outlet abnormityThe cross section of flange 203 adopts the outer recessed stairstepping of convex, can elevated-temperature seal be installed in the outer recess position of the special-shaped flange 203 of outletPad, end compresses elevated-temperature seal pad by screw fixed pressure plate, realizes the sealing to high-temperature fuel gas.
Positioning component 3 is made up of axial location plate 301, radial set collar 302 and blowdown pipe 303. Radial set collar 302Be reserved with the locating hole of blowdown pipe 303, blowdown pipe 303 inserts after this locating hole, is guaranteeing not cross radial set collar 302The position of inner cylinder face and radial location 302 encircle integrally weldedly, make the position of blowdown pipe 303 near turbine wheel back of the body dish chamber,Can take turns back of the body dish chamber to turbine by external gas source and carry out tonifying Qi. Stablizing of guarantee dish chamber flow field and pressure field. Radial set collar302 external cylindrical surfaces are reserved with locating slot, the axial and footpath that locating slot is connected with radial set collar 302 as axial location 301To positioning datum, and then after axial location plate is accurately located by locating slot and radial set collar 302, coaxial and radially fixedPosition ring 302 is integrally welded, forms tack welding component. Positioning component 3 is with in lower flow channel housing 102 in flow channel component 2Locating surface is that benchmark and flow channel component 2 are integrally welded; Above-mentioned radial set collar 302 is in spiral case of the present invention and boosterThe radial location benchmark of support general assembly, in inner cylinder face and booster for guarantee radial set collar 302 in welding processThe axiality of turbine outlet runner has higher requirements, and axiality missionary society causes having welded the inequality of turbine clearance in rear boosterEven, therefore must take welding fixture special or frock to implement welding, after having welded, must detect this axiality and whether meet the demands.
Part material in spiral case of the present invention is heat-resistance stainless steel, by punch forming or fast mould moulding; Wherein, upper reachesThe corrosion resistant plate thickness of road housing 101, lower flow channel housing 101, shell body 201 is 2.5mm-3mm, exports special-shaped flange203 and suction flange 103 corrosion resistant plate thickness be 5mm-6mm, other part corrosion resistant plate thickness are 3mm-4mm.
Claims (7)
1. low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material, is characterized in that: comprise flow channel component,Discharge case body assembly and positioning component;
Wherein, flow channel component comprises upper runner housing, lower flow channel housing and suction flange; Upper runner housing and lower flow channel housingIntegrally welded, form spiral casing flow passage; Suction flange is directly welded in the inlet end face of spiral casing flow passage, forms runner seamPart; Position near spiral casing flow passage import in above-mentioned flow channel component is provided with air vent;
Discharge case body assembly by shell body, vent valve matrix, export special-shaped flange and spiral case outlet housing and form; Wherein,Shell body sidewall has vent valve installing hole; Vent valve matrix, as the carrier of vent valve, is welded on vent valve installing hole place;Spiral case outlet housing is gradual change contraction mouth tubular structure, and cross sectional shape is straight line from arc transition; Spiral case outlet housing is welded onShell body bottom; Export special-shaped flange welding case top outside; Above-mentioned discharge case body assembly bottom is with in flow channel componentThe interior locating surface of runner housing is benchmark, integrally welded with flow channel component, makes to export shell body assembly near spiral casing flow passage,Export special-shaped flange away from spiral casing flow passage;
Positioning component is made up of axial location plate, radial set collar and blowdown pipe; Radial set collar is reserved with the location of blowdown pipeHole; Radial set collar external cylindrical surface is reserved with locating slot, and it is axial that locating slot is connected with radial set collar as axial location plateWith radial location benchmark, and then after axial location plate is accurately located by locating slot and radial set collar, coaxial and radially fixedPosition ring is integrally welded; Positioning component taking the interior locating surface of lower flow channel housing in flow channel component as benchmark and flow channel component be welded intoOne.
2. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the molded line of spiral case is a matching SPL.
3. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the complete wet number of described spiral case is 0.01～0.05.
4. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the wall thickness of described spiral case is at 2～4mm.
5. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the part material in described spiral case is heat-resistance stainless steel, by punch forming or fast mould moulding; Wherein, upper runnerThe corrosion resistant plate thickness of housing, lower flow channel housing, shell body is 2.5mm～3mm, exports special-shaped flange and suction flange notRust steel plate thickness is 5mm～6mm.
6. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the cross section of the special-shaped flange of described outlet adopts recessed stairstepping outside convex, installs high in the outer recess position of the special-shaped flange of outletTemperature sealing gasket, the end fixed pressure plate that exports special-shaped flange compresses elevated-temperature seal pad.
7. a kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material as claimed in claim 1, its feature existsIn: the inner cylinder face of radial set collar is not crossed in described blowdown pipe end.
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| CN201410790437.XA CN104594962B (en) | 2014-12-17 | 2014-12-17 | A kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material |
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| CN201410790437.XA CN104594962B (en) | 2014-12-17 | 2014-12-17 | A kind of low wet several welded types circular rector spiral case such as or not finishing of thin-wall stainless steel material |
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| US10662904B2 (en) | 2018-03-30 | 2020-05-26 | Deere & Company | Exhaust manifold |
| US11073076B2 (en) | 2018-03-30 | 2021-07-27 | Deere & Company | Exhaust manifold |
| CN110671159A (en) * | 2019-09-18 | 2020-01-10 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger volute |
| CN112196632B (en) * | 2020-09-23 | 2023-01-20 | 西安航天动力研究所 | Prepressing turbine inlet shell and machining method thereof |
| CN115950914B (en) * | 2023-01-10 | 2023-07-14 | 哈尔滨工程大学 | Modeling method of gas turbine combustion chamber wall surface cooling characteristic measuring device |
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| US7568338B2 (en) * | 2005-12-23 | 2009-08-04 | Honeywell International Inc. | Multi-piece compressor housing |
| CN102748121A (en) * | 2012-06-27 | 2012-10-24 | 北京航空航天大学 | Two-stage turbocharger for aviation piston engine |
| US20140271165A1 (en) * | 2013-03-15 | 2014-09-18 | Savant Holdings LLC | Variable a/r turbine housing |
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Effective date of registration: 20210617 Address after: No. 1809-03, unit 2, 18 / F, building 2, 87 Jiancai Chengxi Road, Changping District, Beijing 100096 Patentee after: Beijing Keqi future technology development Co.,Ltd. Address before: 100191 No. 37, Haidian District, Beijing, Xueyuan Road Patentee before: BEIHANG University |
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Effective date of registration: 20220124 Address after: 100080 d4112, 4 / F, block D, Zhizhen building, No. 7, Zhichun Road, Haidian District, Beijing Patentee after: Beijing Lingdong Guochuang Technology Co.,Ltd. Address before: No. 1809-03, unit 2, 18 / F, building 2, 87 Jiancai Chengxi Road, Changping District, Beijing 100096 Patentee before: Beijing Keqi future technology development Co.,Ltd. |