CN110073016A - Aluminium alloy turbine wheel shaft nut - Google Patents
Aluminium alloy turbine wheel shaft nut Download PDFInfo
- Publication number
- CN110073016A CN110073016A CN201880002953.8A CN201880002953A CN110073016A CN 110073016 A CN110073016 A CN 110073016A CN 201880002953 A CN201880002953 A CN 201880002953A CN 110073016 A CN110073016 A CN 110073016A
- Authority
- CN
- China
- Prior art keywords
- nut
- aluminium alloy
- wheel shaft
- turbine wheel
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 97
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 239000004411 aluminium Substances 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000011777 magnesium Substances 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000011572 manganese Substances 0.000 claims abstract description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 10
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 17
- 230000008859 change Effects 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 239000011701 zinc Substances 0.000 abstract 1
- 229910052725 zinc Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- 239000000463 material Substances 0.000 description 27
- 229910045601 alloy Inorganic materials 0.000 description 21
- 239000000956 alloy Substances 0.000 description 21
- 229910052751 metal Inorganic materials 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000010935 stainless steel Substances 0.000 description 12
- 229910001220 stainless steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 10
- 229910001369 Brass Inorganic materials 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 239000010951 brass Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 230000004044 response Effects 0.000 description 9
- 230000009467 reduction Effects 0.000 description 8
- 230000000116 mitigating effect Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 239000011651 chromium Substances 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 230000005764 inhibitory process Effects 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000002040 relaxant effect Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 239000000788 chromium alloy Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000001976 improved effect Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 3
- 238000003483 aging Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000009740 moulding (composite fabrication) Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
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- 238000001953 recrystallisation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910002482 Cu–Ni Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910017709 Ni Co Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910003267 Ni-Co Inorganic materials 0.000 description 1
- 229910003262 Ni‐Co Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 229910001229 Pot metal Inorganic materials 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910004349 Ti-Al Inorganic materials 0.000 description 1
- 229910004692 Ti—Al Inorganic materials 0.000 description 1
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000004217 heart function Effects 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 229910001247 waspaloy Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Supercharger (AREA)
Abstract
Pass through the aluminium alloy small using specific gravity the issue of the present invention is to provide a kind of, realize lightweight, and necessary mechanical property can be obtained in high temperature, it especially avoids having taken temperature change as the phenomenon that thus nut relaxes, passes through the nut technology high with the effect of responseization high and other Component compositions and low noise, low vibration.A kind of nut made of aluminum alloy used to fix impeller on the turbine wheel shaft of exhaust-gas turbine turbocharger, wherein, its raw material is aluminium alloy system, the aluminium alloy with weight ratio meter by 10.0%~11.5% silicon, 0.50% iron below, 2.0%~3.0% copper, 0.10% manganese below, 0.20%~0.50% magnesium, 0.10% zinc below, 0.10% titanium below, be respectively 0.10% or less and add up to 0.15% other each ingredients below, the aluminium of remainder forms.
Description
Technical field
The present invention relates to the raw material technologies of nut, specifically, are related to by increasing the exhaust-gas turbine turbine of automobile
The nut that turbine wheel shaft in depressor uses is set as the aluminium alloy stock of light weight, realizes the raising of mitigation, response of turbo lag simultaneously
Inhibit the technology of the nut of noise and vibration.
Background technique
Automobile exhaust turbine type turbocharger is converted and is made used in the internal combustion engine of automobile according to aircraft technology
The technology of supercharging device, wherein aircraft technology improves the density of air and conveys more oxygen to combustion chamber, so as to realize
The low altitude of oxygen concentration.For automobile exhaust turbine type turbocharger, until exploitation is initial until now
The many transition of period experience just reach present degree, the raising that initial purpose is output are developed, in 1973 initially in vapour
Be equipped on vehicle the BMW company of exhaust-gas turbine turbocharger 2002 turbines play about 30% output improvement effect and
Occur, in Japan, later, the further height existed with the combination of DOHC (Dual Over Head Camshaft), based on intercooler is defeated
Change, the ceramic of turbo blade, turbine wheel shaft are carried on the back using the epoch of each high output competitions of automobile manufacture quotient expansion such as ball bearing out
Scape.
Turbocharger is the indispensable means of high output, and the reduction of raising and the discharge for the thermal efficiency
Effectively.High accelerating ability is especially required in passenger car use, therefore the titanium-aluminium alloy (Ti-Al of target is turned to high response
Be alloy), magnesium system alloy (Mg alloy) and the impeller of resin etc. also occur, propose the material skill of light weight and high intensity
Art.
In this way, technology relevant to exhaust-gas turbine turbocharger is gradually increased, sight is directed toward by demand in recent years
The influence to environment of the avoiding of fossil fuel exhaustion, exhaust gas, carrying capacity of environment reduce etc., are suitable for small-sized centered on Europe
Diesel engine, Japan carry out small capacity petrol engine, can from low rotation speed area be pressurized exhaust-gas turbine
The exploitation of turbocharger is the task of top priority.
In general, burning gases and the exhaust side impeller of the high temperature more than 800 DEG C connect in exhaust-gas turbine turbocharger
Touching, heat is heated to that the nut with the end of exhaust side opposite side is arranged in by turbine wheel shaft, so if nut relax and
It falls off, then the state of affairs that the breakage of impeller and turbocharger itself may also can be caused to discard.Thus, for above-mentioned turbine wheel shaft
The nut that uses of end for, excellent heat resistance and be difficult to decrease mechanical property under conditions of being heated to form high temperature
It is necessary indispensable.In addition, if above-mentioned nut loses dynamic equilibrium in high speed area, performance can also be caused compared with
Big to influence, therefore, it is desirable to realize lightweight as much as possible.It, can be among the component for constituting exhaust driven gas turbine however, about nut
Retardation in hair-growing of explaining clearly is slow.
In view of such problems, it is contemplated that if being set as than being used in exhaust-gas turbine whirlpool as the raw material of nut in the past
The small aluminium alloy system of the specific gravity of the stainless steel alloy or chromium system steel of taking turns booster, then be able to solve above-mentioned light-weighted problem.
But the problem of as aluminium, there are problems that heat resistance.The fusing point of aluminium is lower for 660 DEG C, and recrystallization temperature is also 200
DEG C or so, creep is 180 DEG C or so, needs to improve these in the machinery in high-temperature region by carrying out alloying for heat
Property.The technological development of aluminium based on alloying tensile strength, in terms of more research has been made, develop very
To the structure for not being defeated by the high-carbon steel such as spring steel.However, being threaded through the elastic force for mutually keeping pin thread and negative thread and tight
Gu if due to cubical expansivity can not be functioned because of temperature change difference as screw thread, as long as being not only to improve firmly
Degree or intensity, but the function of the nut as screw connection member does not reduce within the temperature range of use and is difficult to relax
The also slower status of the exploitation of the material of the nut of characteristic.
In the past, various technical solutions be also proposed other than the present inventor in order to solve such above problem.For example,
Disclose the technology (referring to patent document 1) of entitled " 12% excellent chromium system steel nut material of sintering resistance ".Specifically
For, be " in order to realize creep and creep rupture strength it is excellent and with excellent sintering resistance nut material, with weight ratio
The ratio to determine each metallic element is counted, there is creep and creep-rupture strength in the same manner as previous 12%Cr system steel nut material
Technology as material excellent and that there is the excellent resistance to sintering characteristic same with the 5%Cr system steel of currently used nut material ".
However, technology documented by patent document 1 and unresolved being brought using raw material made of aluminum alloy as project of the invention
Light-weighted project.
In addition, disclosing the technology (referring to patent document 2) of entitled " booster ".Specifically, " to provide one
The booster that kind can be improved the reliability of the fastening structure of turbo-charger impeller and axis and can be manufactured inexpensively " is class
Topic, scheme are " the shaft end portion of the side supported to turbo-charger impeller, and shape to be arranged in the turbocharger side of axis
At the thrust face that the turbo-charger impeller that will bear upon the shaft end portion is axially positioned, being formed on turbo-charger impeller will
The centre bore that the central part of wheel hub with multiple blades is penetrated through along axis direction, and there is the end face outside from wheel hub along axial
One end of the recessed hole of the tubular of recess setting, centre bore is open in the bottom central part of the recessed hole, the shaft end of a side of axis
Portion is inserted through centre bore, in the outer screw section from centre bore shaft end portion outstanding, will be inserted into the nut spiral shell of the inside of recessed hole
Close and be fastened and fixed " as technology.However, technology documented by patent document 2 is that burning gases is avoided directly to connect with nut
The technology of the influence of heat is touched and mitigated, is not the skill solved using light-weighted project brought by raw material made of aluminum alloy
Art.
In addition, disclosing the technology (referring to patent document 3) of entitled " turbocharger ".Specifically, " to mention
For a kind of turbocharger that can reduce whirling vibration " it is project, scheme is that " a kind of turbocharger has turbine
Axis that booster links with compressor, with by the above-mentioned bear box of bearing portion being pivotally supported as that can rotate and clamping
Sliding bearing between above-mentioned axis and above-mentioned bearing portion, wherein above-mentioned bearing portion is formed by aluminium based material, and above-mentioned axis is by steel
Material is formed, and above-mentioned sliding bearing is formed as copper system material " as technology.However, technology documented by patent document 3 is high
The material of the aluminium alloy of bearing used in the turbine wheel shaft of rotation, not with the condition of the nut of turbine wheel shaft as the present invention
Together, it does not solve the problem of the present invention.
As previously discussed, technology documented by patent document 1 to patent document 3 is it may be said that disclose and turbocharger phase
The effective technology of pass, but if these technologies are able to use aluminium alloy, it, being capable of the further phase with the function respectively having
The case where to raising based on light-weighted performance, is clear, and the light-weighted technology that above-mentioned aluminium alloy stock is used in nut is mentioned
Case can be described as the task of top priority.
Patent document 1: Japanese Unexamined Patent Publication 7-258799
Patent document 2: Japanese Unexamined Patent Publication 2012-92815
Patent document 3: Japanese Unexamined Patent Publication 2013-209934
Patent document 4: Japanese Patent No. 5477930
Summary of the invention
Project of the present invention is to provide a kind of by the aluminium alloy small using specific gravity, realizes lightweight, and even if in height
Wen Huazhong can also obtain necessary mechanical property, especially avoid having taken temperature change as the phenomenon that thus nut relaxes, pass through
High responseization and the high nut technology of the effect of low noise, low vibration with other Component compositions.
The present invention uses following structure: a kind of in order to fix impeller on the turbine wheel shaft of exhaust-gas turbine turbocharger
And the nut made of aluminum alloy used, wherein its raw material is aluminium alloy system, the aluminium alloy with weight ratio meter by 9.5%~
11.5% silicon (Si), 0.50% iron (Fe) below, 4.0%~5.0% copper (Cu), 0.3% manganese (Mn) below,
0.40%~0.80% magnesium (Mg), 0.5% zinc (Zn) below, 0.2% titanium (Ti) below, be respectively 0.10% or less and
Add up to aluminium (Al) composition of 0.15% other each ingredients below, remainder.
In addition, the present invention can also use following structure: a kind of in order in the turbine of exhaust-gas turbine turbocharger
The nut made of aluminum alloy fixing impeller on axis and using, wherein its raw material be aluminium alloy system, the aluminium alloy with weight ratio meter by
10.0%~11.5% silicon (Si), 0.50% iron (Fe) below, 2.0%~3.0% copper (Cu), 0.10% manganese below
(Mn), 0.20%~0.50% magnesium (Mg), 0.10% zinc (Zn) below, 0.10% titanium (Ti) below, be respectively
0.10% or less and add up to aluminium (Al) composition of 0.15% other each ingredients below, remainder.
In addition, the present invention can also use following structure: being formed as in the outer of the aluminium alloy turbine wheel shaft nut
Circumference has bumps.
In addition, the present invention can also use following structure: in one end mask of the aluminium alloy turbine wheel shaft nut
Standby screw part, the screw part can be tightened and be dismantled for screwing togather fastening apparatus.
In addition, the present invention can also use following structure: be equipped with has concave-convex and is inserted into from an end face in inner peripheral portion
The corresponding hole shape of shape for screwing togather fastening apparatus.
In addition, the present invention can also use following structure: with the fastening of following state: based on screwing togather fastening apparatus with described
The corresponding hole shape of shape tool insertion depth in the state that the nut and the turbine wheel shaft screw togather, with the turbine
The outer screw section of axis does not constitute exhaust driven gas turbine from nut relationship outstanding.
Aluminium alloy turbine wheel shaft nut according to the present invention, by making raw material aluminium alloy AA1, AA2, with previous steel
Material, stainless steel system alloy or chromium alloy etc. are compared, and specific gravity is small, for example, relative to steel 7.8 and aluminium be 2.6, be about three points
One of, performance can be realized lightweight, reduces the inertia force centered on rotary shaft, can be realized the raising of response, turbine prolongs
The reduced excellent effect of slow reduction and vibration and noise.
In addition, aluminium alloy turbine wheel shaft of the invention is only with nut from the point of view of constituting the whole ratio of exhaust driven gas turbine
Small size, but by lightweight verticity is improved, it prevents from turning off air throttle when slowing down also to surplus
The case where remaining air is pressurized, performance can be reduced as the waste caused by the release of the exhaust energy of exhaust gas by-pass valve
Excellent effect.
In addition, aluminium alloy turbine wheel shaft nut according to the present invention, the other combinations added to the aluminium for becoming basis
Object is silicon or iron, copper, manganese etc., is easy to get and can reduce economic burden, this point can play compared with prior art
Sharp effect.
In addition, aluminium alloy turbine wheel shaft nut according to the present invention, according to the skill for having been achieved with patent with the present inventor
Art (referring to patent document 4) combination and the Overlay generated, the raising compared with the past that can realize response tremendously,
Vibration and the mitigation of noise this upper extremely effective effect of performance.
Detailed description of the invention
Fig. 1 is the diagram showing the structure for indicating the basic structure of aluminium alloy turbine wheel shaft nut of the invention.
Fig. 2 is the structure explanation for illustrating the structure of the exhaust driven gas turbine using aluminium alloy turbine wheel shaft nut of the invention
Figure.
Fig. 3 is the use state explanatory diagram for illustrating the use state of aluminium alloy turbine wheel shaft nut of the invention.
Specific embodiment
Maximum of the invention is characterized in that, is used in the end of the turbine wheel shaft 31 of exhaust-gas turbine turbocharger 10
Lightweight is realized using the small aluminium alloy of specific gravity in nut 2, can be realized raising, the turbine of the rotation response of exhaust driven gas turbine 30
The reduction of delay and the inhibition of vibration.Hereinafter, being illustrated based on attached drawing.But it is not limited to these attached drawings or table
Documented shape or structure, can be in the range of effect that can be obtained the creation as technical idea of the invention and play
Inside change.
Fig. 1 shows the overall structure of aluminium alloy turbine wheel shaft nut 1 of the invention.Aluminium alloy turbine wheel shaft of the invention
It is the nut 2 used in the end of the bearing of turbine wheel shaft 31 with nut 1, shape can be such usual shown in (a) of Fig. 1
Hex nut 2, also can be set to shown in (b) of Fig. 1 such nut 2 for having hexagon ring.Furthermore it is possible to be set as Fig. 1's
(c) such waveform shape nut 2 shown in also can be set to such nut 2 for having waveform hole shown in (d) of Fig. 1.This
Outside, it can be set to shape shown in (e) of Fig. 1 for tubular and on surface without bumps, as the tool towards internal diameter insertion tool
It is inserted into hole H, the wall thickness between internal diameter and outer diameter is arranged with the nut 2 of the shape of hole portion.That is, it is desirable to by disappearing as much as possible
Except prominent shape and it is set as the few shape of air drag and reduces the generation of noise.
The embodiment as shown in (c) of (a) of Fig. 1 and Fig. 1, concaveconvex shape is being set using from periphery towards outside
And in the case where the structure tightened using tool, noise may be generated from the bump of periphery in height rotation, still
The thickness T of the nut 2 of width direction can be thinned, therefore have the advantages that be able to achieve light-weighted.It should be noted that above-mentioned
Periphery concaveconvex shape is set as from the hexagon of (a) of Fig. 1 to the polygon (such as nine sides or twelve edge) more than herein, Huo Zheru
It is reduced shown in (c) of Fig. 1 and (d) of Fig. 1 by the number of the fluctuating of increase waveform shape and is protruded caused by the convex-concave of each
The case where variable quantity, is also effective.
On the other hand, it the embodiment as shown in (d) of (b) of Fig. 1 and Fig. 1, is set as using by concaveconvex shape
In the case where the structure tightened from inner peripheral surface towards the direction at center and with tool, tool insertion depth is needed in the axial direction
K, thus there are the thickness T of nut 2 thicken and on the whole weight increase a possibility that.But due to that can be removed in periphery
Bump, therefore there is the advantage that producing cause that can eliminate noise.That is, the shape of (b) in (a) from Fig. 1 to Fig. 1
In shape, both mitigation and lightweight of noise cannot achieve.
Therefore, the shape as shown in (e) of Fig. 1, thickness T if it is thinned nut and between internal diameter and outer diameter
Same pitch circle on the structures in multiple insertion holes are equi-angularly set away from center, then can make tool insertion depth K in order to logical
It crosses the female threaded portion S for screwing togather the outer screw section fastening by turbine wheel shaft 31 and needing to be constituted with same thickness, and is not required on surface
Bumps as described above are wanted, therefore can also prevent the noise generated by above-mentioned shape.In the case where using above structure,
Although attached drawing is not shown, need specific purpose tool screws togather fastening apparatus 70.But it as long as is pulled for box spanner or torque
Hand prepares special part, just can be coped with using existing tool.It should be noted that aluminium alloy system of the invention
Turbine wheel shaft is not limited to shape shown in FIG. 1 with the shape of nut 1, as long as eliminating or reducing in above-mentioned periphery and end face
Concave-convex structure.
The turbine wheel shaft of aluminium alloy of the invention nut 1 has technical characteristic and following institutes based on above explained shape
That shows has determined that the technical characteristic of the raw material as aluminium alloy AA1, AA2, especially maximum are characterized in that utilize existing
The aluminium alloy not being available under the hot environment of exhaust driven gas turbine 30 in technology.Also, it prevents due to the machinery under heated condition
The variation of characteristic and lead to the most important the case where relaxing of nut 2.Therefore, illustrate that above-mentioned aluminium is closed to table 5 using table 1 first
Mechanical property when being used under the composition and high temperature of golden AA1, AA2.
In the past, it for the raw material of the nut 2 of the turbine wheel shaft 31 of exhaust-gas turbine turbocharger 10, is utilized and is with steel
Basis and be added to nickel and chromium alloy (Cr-Ni system) or chromium alloy (Cr steel) or stainless steel system alloy (Ni-Cr), into
And it is a variety of alloys of titanium alloy (Ti system) etc., the extremely excellent alloy of mechanical property is also developed, such as propose
WASPALOY (registered trademark), heat-resistant corrosion-resistant alloy of chrome-iron-nickel (registered trademark) like that corrosion resistance, heat resistance, oxytolerant chemical conversion and
The excellent raw material of the hot properties of creep resistant etc..In addition to this, it is also contemplated that by Haynes alloy (HaynesAlloy),
A part in the raw material of high price used in Ni-Co series alloy, Cu-Ni system alloy etc., aircraft etc. is as exhaust-gas turbine turbine
The nut 2 of the turbine wheel shaft 31 of booster 10 is used.
However, these alloys are due to based on heavy nickel or chromium etc., it can be said that being to be difficult to light-weighted original
Material, in addition, cost is high, it may be said that be unsuitable for inhibiting the raw material of the solution of project of the invention as cost.It needs
It is bright, although titanium is 2 times of specific gravity 4.5 of aluminium, specific strength it is high and can be made to it is relatively thin, therefore as absolute weight
And it can be realized lightweight, it may have heat resistance, intensity increase in exhaust-gas turbine turbine special as vehicle of racing at present
It is also used in the nut 2 or turbine wheel shaft 31 of depressor 10.But titanium is also high price, therefore is increased the problem of cost.Therefore, exist
In the present invention, using the few aluminium alloy of the burden in terms of cost, it is illustrated as described below about its composition.
Fig. 2 is to illustrate that the structure of the structure of the exhaust driven gas turbine 30 using aluminium alloy turbine wheel shaft nut 1 of the invention is said
Bright figure.As shown in Fig. 2, showing exhaust driven gas turbine 30 by exhaust side impeller 32, air inlet side impeller 33, turbine wheel shaft 31, one-piece type floating
The case where dynamic metal bearing 20 is constituted.
Exhaust driven gas turbine 30 is that exhaust side impeller 32 and air inlet side impeller 33 are configured and fixed at the both ends of turbine wheel shaft 31
Rotary body.
Exhaust side impeller 32 is the impeller for absorbing using the energy of exhaust gas as rotary motion, via turbine wheel shaft 31 to
The air inlet side impeller 33 for being set to the end of opposite side transmits.In order to efficiently absorb the movement fluid of above-mentioned exhaust gas and make its to
Rotary motion variation, and be the shape for being suitable for pressurization by multiple blade formings, in addition, in petrol engine, due to existing
The case where temperature of exhaust gas is more than 1000 DEG C, it is therefore desirable to be resistant to the raw material of above-mentioned temperature.It should be noted that in the past will pottery
Porcelain raw material or titanium alloy etc. are used in the sports vehicle etc. of a part, but although ceramic excellent heat resistance, but it is easy hair
The cost of raw rupture etc., titanium alloy is high and the problem of have in terms of cost.Therefore, in the present invention, it is therefore an objective to by axis
It holds using aluminium alloy and improves the response of pressurization caused by the inertia force of rotary body, therefore for being rotated in same central spindle
For exhaust side impeller 32, realize that light-weighted situation is effective as much as possible.
Air inlet side impeller 33 is for the driving force by transmitting from exhaust side impeller 32 via turbine wheel shaft 31, using from big
The pressure of natural air and the speed of air-flow that are flowed into gas and the component rotated, and be the leaf for being pressed into air into cylinder
Wheel.It should be noted that becoming super near the front end of the blade of impeller sometimes since turbine reaches close to 200,000 turns
The peripheral speed for crossing the degree of velocity of sound needs to have in used temperature region heat-resisting for being heated because of air drag
Property, for the mechanical strength and intensity of air drag.
Fig. 3, which is shown from aluminium alloy turbine wheel shaft nut 1 of the invention, to be rotated with forward direction exhaust-gas turbine turbocharger
10 states used.Situation shown in Fig. 3 is state of the invention to be utilized in general exhaust supercharging device, but do not have
It is particularly defined to this record, position and ratio in 10 entirety of exhaust-gas turbine turbocharger etc. are illustrative.With
Under, illustrate the composition for the general exhaust-gas turbine turbocharger 10 that aluminium alloy turbine wheel shaft nut 1 of the invention uses
The component in whole each portion.
Floating metal 20 is cylindric sliding bearing, and is the gap with axis and bear box 40 of periphery in maintaining
The floating bearing that ground connects and rotates freely.In addition, the oil film damping by interior periphery is high, relative velocity is also low, can
It is suitable for high-speed bearing to say.
Turbocharger housing 50 is to wrap up exhaust side impeller 32 and be made of the lead-in portion of exhaust gas and ejection portion
Component, play the effect for making exhaust gas from engine accelerate and guide to the exhaust side impeller 32 of decision.Above-mentioned turbine increases
Depressor shell 50 exposes to the open air at high temperature always in order to directly guide exhaust gas, usually used to have heat resistance, thermal diffusivity and be difficult to
The casting structure made of iron of the characteristics such as thermal expansion.
Bear box 40 is in the center of turbocharger housing 50 and compressor housing 60, has the axis of turbine wheel shaft 31
It holds, there is the function that the two housings are combined and supported.For the structure of aluminium alloy turbine wheel shaft nut 1 of the invention,
Instantiate the knot being pivotally supported using air inlet side and the integrated floating metal bearing 20 of exhaust side by bear box 40
The case where structure.
Compressor housing 60 wraps up air inlet side impeller 33, is made of the suction part of air and ejection portion, has and draws
It leads air and the dynamic pressure applied by air inlet side impeller 33 is converted into the function of static pressure.
The bidery metal used in the past within the bearing sintering resistance, in terms of it is excellent, it may be said that be optimal original
Material, but have when being exposed under high temperature as the raw material of bearing and limit the problem of reducing, also developing instead
Also there is the minimum raw material of the reduction of mechanical property at high temperature in Pot metal or Allen's metal alloy.However, above-mentioned alloy needs
Plating is wanted to handle, it has to solve that manufacturing process increases and cost increases such problems, in the raw material as above-mentioned bearing
During the research and development for promoting aluminium alloy, the present inventor is swollen according to the elongation and line as screw connection member at high temperature
The relationship of swollen coefficient etc., it was found that the aluminium alloy for the characteristic for being difficult to relax is shown at high temperature.Below to above-mentioned
Mixing is illustrated.
By inhibiting the raising of wear resistance to be realized, it is expected that containing ratio is by thermally-induced expansion containing silicon (Si)
Within the scope of 9.5Wt% to 11.5Wt%, within the scope of more preferably 10.0Wt% to 11.5Wt%.
Sintering prevents and contains iron (Fe) in order to prevent.But when the content of iron increases, then it can make strength reduction.Phase
Prestige containing ratio is 0.5Wt% or less.
Contain copper (Cu) to improve intensity.In addition, intensity can be further increased and being additionally added nickel.It is expected that containing
Having rate is any of preferably 2.0Wt%~3.0Wt% or 4.0Wt%~5.0Wt% within 2.0Wt%~5.0Wt% range
Within range.
The corrosion resistance that manganese (Mn) is able to maintain aluminium is constant and improve intensity, strong by further increasing it containing magnesium (Mg)
Degree.It is expected that within the scope of containing ratio is 0.3Wt% or less, more preferably 0.1Wt% or less.
By can be improved intensity and corrosion resistance containing magnesium (Mg).But be only carry out cold working can due to aging and
Intensity decline, therefore carry out stabilization processes.In the exhaust-gas turbine turbocharger 10 especially used at high temperature, exist
The problem of stress-corrosion cracking, it is therefore desirable to the protection of soft material.In addition, containing when with certain than containing magnesium (Mg) and silicon
(Si) when, facilitate the age-hardening of heat treatment.It is expected that within the scope of containing ratio is 0.2Wt%~0.8Wt%, preferably
Within any range of 0.2Wt%~0.5Wt% or 0.4Wt%~0.8Wt%.
Zinc (Zn) contains together with magnesium (Mg), becomes the highest alloy of intensity in aluminium alloy by heat treatment.It is expected that containing
Having rate is 0.5Wt% hereinafter, more preferably 0.1Wt% or less.
Titanium (Ti) can be realized crystal grain miniaturization, engineering properties improves, or can be realized receipts in Al-Cu alloy etc.
Draw line prevents.But when content is excessive, the increase of molten metal viscosity is led to the problem of.It is expected that containing ratio be 0.2Wt% with
Within the scope of lower, more preferably 0.1Wt% or less.
It, can if aluminium alloy also small using specific gravity in nut 2 at high temperature by mixing above-mentioned each metal
Constitute the exhaust driven gas turbine 30 of light weight, it may be said that the more problem of the problem of capable of eliminating above-mentioned tracing ability, heat transfer etc..
But it is lower and keep creep anti-since the fusing point of aluminium (Al) is about 660 DEG C, recrystallization temperature is about 200 DEG C
Should occur at 180 DEG C etc., as may expose to the open air until 200 DEG C nearby at a high temperature of exhaust-gas turbine turbocharging
The turbine wheel shaft 31 of device 10 is mounted with to be fixed in the nut 2 of bear box 40 on the basis of impeller, it is believed that is not available aluminium conjunction
Gold.However, exhaust-gas turbine turbocharger 10 in recent years has intercooler or independent lubricating structure or cooling
The high temperature side of device etc., temperature range is lower, turbine wheel shaft 31 due to the performance of lubricating oil raising and temperature will not as it is previous that
Sample rises, and highest is also with regard to 150 DEG C or so, and nut 2 will not rise to the temperature that creep occurs, even the machinery such as intensity and hardness
Characteristic is easy the aluminium alloy influenced by heat, copes with as long as having the necessary mechanical property near 200 DEG C.
Therefore, the present inventor to the raw material of the aluminium alloy turbine wheel shaft nut 1 for all eliminating above-mentioned each problem into
Row research, as relaxing for the mechanical property being able to achieve near 200 DEG C as nut 2, especially solution screw part
Or bonding such problems, and in addition to this hardness and elongation etc. will not aging etc. the high raw material of durability, complete
Aluminium alloy AA1, AA2 of the invention.
The mixing of the composition of the alloy used about aluminium alloy turbine wheel shaft of the invention with the raw material of nut 1 uses
Table 1 and table 2 are illustrated.The table 1 shows the mixed relationship of the other alloying elements mixed to aluminium, and table 2 is in order to be compared
Compared with and the material that heat resistance is especially excellent the stainless steel alloy used in the past among is shown.In addition, weight when for stainless steel
Increase, therefore also shows that be compared the relevant composition of the brass representative to the raw material as light weight.
[table 1]
[table 2]
Table 1 is the table for indicating the ratio of various metals of the metal mixed to basis, by technical solution of the present invention 1 or
2 invention is successively shown as aluminium alloy AA1, AA2 from top respectively, shows be used in turbine wheel shaft 31 in the past thereunder
Raw material, be able to carry out and compare.Table 2 will select three kinds of representative materials from previous stainless steel system, select from brass system
A kind of representative material is selected to be indicated.The table 1 is compared with table 2 and is clear that composition and mixed difference.
Illustrate the mechanical property of aluminium alloy AA1, AA2 of the invention using table 3 and table 4.Table 3 is to have investigated aluminium of the invention
The table of the material property of alloy, table 4 are the tables of mechanical property when having investigated the raw material using stainless steel system and brass system.As
The material of respondent is the material carried out extrded material at room temperature after quenched (T6 processing).Survey item is tensile strength
(MPa), 0.2% yield strength (MPa), elongation (%) and hardness (HRB), show the result investigated respectively.
[table 3]
[table 4]
After the fastening of the turbine wheel shaft 31 used at high temperature nut 2 generates thermal expansion caused by heating and engine stop
Cooling be repeatedly cause metal fatigue, therefore do not require nothing more than heat resistance, and require creep resistance characteristic, corrosion resistance
Deng high mechanical property.The principle of the especially fastening of pin thread and negative thread be to be formed will not due to until yield point elongation
Rate or expansion and the principle of state relaxed, therefore be not that only tensile strength or hardness show high level.
The raw material of nut 2 as the exhaust-gas turbine turbocharger 10 used at high temperature, exists and compares stainless steel
The excellent heat-resistant corrosion-resistant alloy of chrome-iron-nickel (registered trademark) etc. for being referred to as high heat resistance material of alloy.But cost as described above
Height has that expense burden increases in use aspects.In addition, titanium is also the material of excellent heat resistance, but with above-mentioned nickel
The same cost of ferrochrome heat-resistant and etching-resistant alloy is high, in addition, titanium could also say that yield point caused by temperature is unstable, elongation it is few and
The metal being broken suddenly cannot be said if remaining untouched although can use as the addition of heat resistance raising
It is suitable for the fastening nut 2 of turbine wheel shaft 31.Among such status, having can use heat resistance and corrosion resistance is excellent
Status as SUS304 and SUS316 of different stainless steel alloy etc..
SUS304 be in the stainless steel of nickname 18Cr-8Ni or 18 straight-chromiun stainless steel as heat resisting steel and most broad-spectrum and
One of steel grade, since the engineering properties such as corrosion resistance, weldability are good and known.In addition, SUS316L is by for austenite
It is that the particularly good SUS316 of corrosion resistance reduces the steel that carbon amounts is allowed to slightly softness and improves processability among stainless steel,
It can be used for heat-resisting bolt or heat-resisting nut 2.But specific gravity 7.8, the weight nearly 3 times compared with aluminium.
But due to coefficient of thermal expansion height in stainless steel system, exists to be easy to produce because of expansion when heated and relax
The problem of.In addition, as the reason of screw thread relaxes at high temperature, it is believed that the reduction of reduction and the flank friction of Axial stress in bolt
It is principal element, in general, generating expansion, the stress relaxation of microcosmic property when expanding, shrinking repeatedly by temperature cycles etc.
(roughness grade), axial force is easily reduced, and may be generated and be relaxed in environment at high temperature, and status is also to utilize lock
Gu chemicals such as agent.
In addition, adhesion is caused according to the combination of material sometimes and the friction of flank is caused to become securely, therefore,
The case where raw material of nut 2 selects corresponding raw material according to the diameter of turbine wheel shaft 31, length and raw material is most important, usually makes
Pin thread is identical as the raw material of negative thread.
Mechanical property under the heated condition of aluminium alloy AA1, AA2 of the invention is shown in table 5.
[table 5]
It should be noted that table 5 has been investigated as table 2 in the alloy for forming aluminium alloy AA1, AA2 shown in table 1
After engineering properties, by following step, investigate in the range under from room temperature to the high fever for being more than use temperature range
The result of the variation of engineering properties after the stipulated time.Specifically, after solution treatment, at artificial age-hardening
The material of reason does not carry out cold processing energetically, small with 150 DEG C or 200 DEG C heating 100 after quenched (T6 (JIS standard))
When, back return to room temperature side and place, be heated to be 150 again by the heater of extensiometer after tension test sheet processing
DEG C or 200 DEG C, implement tension test etc..
According to the measurement result of above-mentioned engineering properties, table 5 is shown even if under 150 DEG C and 200 DEG C of heated condition, is arranged
The nut 2 of the turbine wheel shaft 31 of the wheeled turbocharger 10 of gas eddy can also utilize the case where aluminium alloy AA1, AA2 of the invention.
That is, playing lightweight, sound when being comparably 1/3 or so aluminium alloy AA1, AA2 using specific gravity and previous stainless steel system alloy
What the mitigation of the raising, turbo lag answered, the inhibition of the generation for signal of encouraging oneself and noise generated prevents such effect.
In aluminium alloy AA1, mechanical property in the state of being heated to 200 DEG C after T6 is quenched is, tensile strength from
426N/mm2It is reduced to 219N/mm2, 359N/mm is reduced at 150 DEG C2, with Brinell hardness tester from 79 in hardness test
(HRB) it is reduced to 60 (HRB) (200 DEG C), but it is 16% that elongation increases from 11%, is thus similar to brass (C3604)
Mechanical property (tensile strength 420N/mm under room temperature2, elongation 25%, linear expansion coefficient 20.5 × 10-6), have as spiral shell
The mechanical property of line.
In aluminium alloy AA2, mechanical property in the state of being heated to 200 DEG C after T6 is quenched is, tensile strength from
458N/mm2It is reduced to 259N/mm2, 393N/mm is reduced at 150 DEG C2, with Brinell hardness tester from 85 in hardness test
(HRB) become 71 (HRB) (200 DEG C), 86 (150 DEG C) and it is with low uncertainty, elongation increases to 15% (200 DEG C) from 8%, 150
Elongation does not change and shows as 15% at DEG C.Thus, aluminium alloy AA2 is compared with aluminium alloy AA1, it may be said that be similar to
Mechanical property toward under the room temperature of the brass (C3604) used as representative raw material, in addition, the brass (C3604) exists
Under 100 DEG C of heated conditions, tensile strength 314N/mm2, at 200 DEG C be 310N/mm2And biggish variation is not observed, but
It is to be drastically reduced at 400 DEG C as 196N/mm2Characteristic etc. show and the extremely similar characteristic of aluminium alloy AA2 of the invention.
Quenched is to imagine product to have used 100 hours states at 150 DEG C and 200 DEG C and carried out, after T6 processing
Hardness and stretching strength determination are carried out.It should be noted that above-mentioned T6 processing is to improve the engineering properties of aluminium alloy, strong
The combined heat treatment of processing of timeliness is precipitated in degree, hardness and machining property and artificially having carried out, be dissolved, quenched,
Tempering.
Linear expansion coefficient is the characteristic of material required in the design of nut 2, shows to stretch along what specific direction was stretched
Shrinkage, the thermal expansion coefficient expanded from the variation along with volume is different, the index variation according to shape.In the present invention,
The problem that is expanded into direction is screwed togather as the fastening relationships of pin thread and negative thread, but the line of aluminium alloy AA1, AA2 are swollen
Swollen coefficient respectively becomes 22.2 × 10-6/ DEG C and 20.8 × 10-6/ DEG C, show the representative brass with existing product
(C3604) the approximate linear expansion coefficient of nut 2 made, therefore relaxing for nut 2 caused by heat affecting shows and previous Huang
Nut 2 made of copper is same.But above-mentioned numerical value considers the whirlpool with the object of the nut 2 as the brass used etc. in the past
The corresponding expansion characteristics of wheel shaft 31, if the material composition change of turbine wheel shaft 31, as long as corresponding to the raw material and being used separately aluminium conjunction
Golden AA1 and aluminium alloy AA2.
About hardness, relax in order to prevent and at the contact surface of pin thread and negative thread frictional resistance tool it is discrepant
As long as situation is used separately aluminium alloy AA1 and aluminium corresponding with the hardness of the outer screw section of turbine wheel shaft 31 it may be said that be difficult to relax
Alloy AA1.In the present invention, aluminium alloy AA1 is 79HRB, and aluminium alloy AA2 is 85HRB, although can observe at 200 DEG C
Slightly reduced to hardness, but in AA1 have 70HRB, in AA2 have 71HRB as hardness, it is known that under room temperature
Stainless steel or brass, which are compared, can also maintain sufficient performance.
It should be noted that relaxing for nut caused by rising for temperature is also tested.By torque wrench with
After regulation torque is tightened, increase temperature, utilized after a certain time in order to grasp the relaxing state of nut 2 torque wrench into
Measurement is gone.It substantially has almost no change about above-mentioned test, therefore does not record, but at 200 DEG C or less in turbine wheel shaft 31
Being clamped in the state of impeller will not relax.
The present inventor is during modifying the various processing conditions such as surface roughness, roundness, even if experienced makes height
The roundness characteristic of precision, surface roughness characteristics improve also be difficult to inhibit the noise from turbocharger generation,
The process of the generation of the vibration for the reason of causing for this is more in the roundness slight variation by making the inner surface of bearing hole 26
The position of side shape cannot inhibit under the such design of the generation of vibration, so that roundness is carried out various change and to vibration
Experiment is repeated in the presence or absence of dynamic, noise generation, completes technology " the low vibration type floating metal for the generation that can reduce vibration
Bearing " (referring to patent document 4) (hereinafter referred to as " low vibration sliding bearing "), has used aluminium alloy of the invention by being set as
The low vibration sliding bearing of aluminium alloy AA1, AA2 raw material of turbine wheel shaft processed nut 1, can play by mutual technology with being superimposed
The effect of generation.
That is, the invention of above-mentioned low vibration sliding bearing can obtain high centering effect from low rotation speed area to high rotary area
With the effect of the generation of noise suppression, but foregoing invention effect is the effect generated since rotation, therefore passes through composition
The lightweight of the nut 2 of one of the component of rotary body is also able to achieve the whole lightweight of exhaust driven gas turbine 30, can be realized turbine and prolong
The inhibition of the generation of the noises such as slow raising, self-excited vibration, the noise of inhibition, response.
It is therefore preferable that using following structure: in the table of the bearing hole 26 of aluminium alloy turbine wheel shaft of the invention nut 1
Face equidistantly has the different region of multiple fluid lubrication conditions away from axle center isogonism, makes gap slightly on the surface of bearing hole 26
Microvariations, forms the narrow membranaceous flow path towards the substantially convex of shaft core direction in oil stream road, thus generates oil pressure and becomes
Change.
In addition, the different region of above-mentioned fluid lubrication condition is set as with will be narrow membranaceous towards the substantially convex of central spindle
Flow path change gap with the mode that substantially concave wide membranaceous flow path towards peripheral direction smoothly links
The case where region, is also effective.
Point for the pressure that the centering (making heart function by oneself) of effect as above structure is such as generated according to Reynolds equation
Cloth is such, when the slightly different part of roundness to be configured to the same circumference edge of equiangular position, generates because of rotation
Pressure change is equally spaced generated with same size on the same circumference always, therefore is begun due to its pressure difference in turbine wheel shaft 31
The power towards center is generated eventually, even if rotation speed is low, centering effect is also substantially simultaneously generated with rotation.Therefore, if
Turbocharger and the weight of the bearing of rotation can lightweight, then be able to solve project of the invention, be capable of providing response
Raising, the mitigation of turbo lag, the inhibition of self-excited vibration and to vibrate the reduced exhaust driven gas turbine of the generation of the noise for cause
Formula turbocharger 10.
Industrial availability
Aluminium alloy turbine wheel shaft nut according to the present invention, the rotation of the exhaust driven gas turbine 30 of exhaust-gas turbine turbocharger
The rising of rotary speed shifts to an earlier date, as a result, can be realized the raising of mitigation and the response of turbo lag, due to the torque of rotary body
Reduction and can be realized the mitigation of the inhibition of self-excited vibration and the generation of noise, be especially easily adapted to reduce sizing push away
Into small-sized exhaust-gas turbine turbocharger, it is contemplated that from now on Japan automobile industry in industrial availability
It is high.
Description of symbols:
1 aluminium alloy turbine wheel shaft nut
2 nuts
10 exhaust-gas turbine turbocharger
20 floating metal bearings
26 bearing holes
30 exhaust driven gas turbines
31 turbine wheel shafts
32 exhaust side impellers
33 air inlet side impellers
40 bear boxes
50 turbocharger housings
60 compressor housings
70 screw togather fastening apparatus
AA1 aluminium alloy
AA2 aluminium alloy
H tool insert hole
K tool insertion depth
S female threaded portion
The thickness of T nut
Claims (6)
1. a kind of aluminium alloy turbine wheel shaft is in order in the turbine wheel shaft of exhaust-gas turbine turbocharger (10) with nut (1)
(31) nut made of aluminum alloy (2) fixing impeller on and using, which is characterized in that
Its raw material be aluminium alloy (AA2) system, the aluminium alloy (AA2) with weight ratio meter by 9.5%~11.5% silicon (Si),
0.50% iron (Fe) below, 4.0%~5.0% copper (Cu), 0.3% manganese (Mn) below, 0.40%~0.80% magnesium
(Mg), 0.5% zinc (Zn) below, 0.2% titanium (Ti) below, be respectively 0.10% or less and to add up to 0.15% below
Aluminium (Al) composition of other each ingredients, remainder.
2. a kind of aluminium alloy turbine wheel shaft is in order in the turbine wheel shaft of exhaust-gas turbine turbocharger (10) with nut (1)
(31) nut made of aluminum alloy (2) fixing impeller on and using, which is characterized in that
Its raw material be aluminium alloy (AA1) system, the aluminium alloy (AA1) with weight ratio meter by 10.0%~11.5% silicon (Si),
0.50% iron (Fe) below, 2.0%~3.0% copper (Cu), 0.10% manganese (Mn) below, 0.20%~0.50% magnesium
(Mg), 0.10% zinc (Zn) below, 0.10% titanium (Ti) below, be respectively 0.10% or less and add up to 0.15% or less
Other each ingredients, remainder aluminium (Al) composition aluminium alloy (AA1) system.
3. aluminium alloy turbine wheel shaft according to claim 1 or 2 is with nut (1), which is characterized in that
Be formed as that there are bumps in the peripheral part of the aluminium alloy turbine wheel shaft nut (1).
4. aluminium alloy turbine wheel shaft according to claim 1 or 2 is with nut (1), which is characterized in that
Has screw part in one end face of the aluminium alloy turbine wheel shaft nut (1), which can be for screwing togather fastening
Tool (70) is tightened and is dismantled.
5. aluminium alloy turbine wheel shaft according to claim 3 or 4 is with nut (1), which is characterized in that
There are bumps in inner peripheral portion,
Equipped with from screwing togather fastening apparatus (70) and hole shape corresponding with shape described in the insertion of an end face.
6. aluminium alloy turbine wheel shaft according to any one of claim 3 to 5 is with nut (1), which is characterized in that
By the aluminium alloy turbine wheel shaft nut (1) with the fastening of following state: based on screwing togather fastening apparatus (70) with described
The tool insertion depth (K) of the corresponding hole shape of shape in the state that the nut (2) and the turbine wheel shaft (31) screw togather, with
The outer screw section of the turbine wheel shaft (31) does not constitute exhaust driven gas turbine (30) from the nut (2) relationship outstanding.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017223163A JP6294557B1 (en) | 2017-11-20 | 2017-11-20 | Aluminum alloy nut for turbine shaft |
| JP2017-223163 | 2017-11-20 | ||
| PCT/JP2018/030167 WO2019097783A1 (en) | 2017-11-20 | 2018-08-12 | Aluminum alloy turbine shaft nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110073016A true CN110073016A (en) | 2019-07-30 |
Family
ID=61629007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002953.8A Pending CN110073016A (en) | 2017-11-20 | 2018-08-12 | Aluminium alloy turbine wheel shaft nut |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6294557B1 (en) |
| CN (1) | CN110073016A (en) |
| WO (1) | WO2019097783A1 (en) |
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|---|---|---|---|---|
| EP0730040A1 (en) * | 1995-02-27 | 1996-09-04 | The Furukawa Electric Co., Ltd. | High-pressure cast aluminum alloy with excellent strength and toughness, method of producing the same and wheel disc used the same |
| CN101144134A (en) * | 2007-10-15 | 2008-03-19 | 李贞宽 | Aluminum-silicon series deforming alloy and manufacturing method thereof |
| CN201568433U (en) * | 2009-12-10 | 2010-09-01 | 湖南天雁机械有限责任公司 | Lock nut of compressor impeller of turbocharger |
| CN102639841A (en) * | 2009-12-22 | 2012-08-15 | 博格华纳公司 | Shaft assembly of an exhaust-gas turbocharger |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2019094525A (en) | 2019-06-20 |
| WO2019097783A1 (en) | 2019-05-23 |
| JP6294557B1 (en) | 2018-03-14 |
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