CN106285787A - A kind of vehicle turbocharger turbine and the attachment structure of rotating shaft - Google Patents
A kind of vehicle turbocharger turbine and the attachment structure of rotating shaft Download PDFInfo
- Publication number
- CN106285787A CN106285787A CN201610756132.6A CN201610756132A CN106285787A CN 106285787 A CN106285787 A CN 106285787A CN 201610756132 A CN201610756132 A CN 201610756132A CN 106285787 A CN106285787 A CN 106285787A
- Authority
- CN
- China
- Prior art keywords
- turbine
- rotating shaft
- attachment structure
- blind hole
- protuberance
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The invention discloses the attachment structure of a kind of vehicle turbocharger turbine and rotating shaft, including rotating shaft and turbine, the protuberance matched and blind hole it is respectively equipped with in rotating shaft and turbine, it is mutually permanently connected by screw thread, threaded fastening direction is identical with the work rotation direction of turbine, make turbine have self-locking ability with the attachment structure of rotating shaft, getting loose in work process can be avoided, keep solid and reliable connection.Screw thread both sides are additionally provided with the one group of guiding position that can cooperate, guiding position is interference fit, can ensure that intermediate rotary shaft keeps high central degree with turbine in limited connection distance, thus help the rotation amount of unbalance controlling whole rotor to maintain extremely low level.Owing to the present invention uses the non-through of blind hole to design, it is to avoid for the impact of turbine structure intensity and the integrity problem that may cause.
Description
Technical field
The present invention relates to vehicle turbocharger field, particularly relate to the company of a kind of vehicle turbocharger turbine and rotating shaft
Access node structure.
Background technology
Vehicle turbocharger agent structure generally comprises three parts, as it is shown in figure 1, include absorbing high-temp waste gas energy
Turbine 300 (including turbine, volute and runner, and subsidiary body), the intermediate bearing arrangement 200 of transmission energy (include axle
Hold stator, rotor, and cooling and lubricating mechanism) and compression fresh air compressor 100 (include pinch roller, pressure shell and runner, and
Subsidiary body).Wherein the major function of turbine is to guide the high efficiency expansion workmanship that carries out of engine high-temperature exhaust air to drive
Turbine rotates, in order to the exhaust energy of absorption is converted into rotating mechanical energy, is transferred to compressor by rotating shaft and completes fresh
The compression of air inlet.One of core component of turbine is turbine, since it is desired that tolerance high-temperature exhaust air is (for gasoline exhaust temperature
1050 degrees Celsius may be up to) centrifugal force that causes of the thermal stress that causes and high rotating speed (the highest more than 250,000 rpms),
(engine exhaust comprises nitrogen oxides, sulfide and other oxides etc., cooling additionally to need enough oxidation resistances
Combine with steam afterwards and form sour corrosion material), it is therefore desirable to very high strength tolerance thsrmal-mech coupling, and chemically stable
Property, good creep strength, thermal fatigue resistance and antioxygenic property, meet the design requirement of life-span and performance.The most often
Material be the nickel-based superalloy of aviation grade, the typical case trade mark such as Inco713 and MarM247.Correspondingly, middle
Rotating shaft typically uses high-strength die steel matter, can have good machinability, and bear high-revolving ability.Turbine and
Intermediate rotary shaft typically uses welding manner to link together, and it is real that current supercharger manufacturing has had highly developed technique
Existing, it is typically include electron beam weldering or friction welding (FW), it is possible to adapt to different design and use conditions.Fig. 2 show turbine with
The welding connection structure of rotating shaft, including solder side 1, for the part of rotating shaft 2, generally steel matter, the portion on right side on the left of solder side 1
Position is turbine 3, generally nickel-base alloy material.The major defect of the turbine of nickel-base alloy material is that density is excessive, causes rotating
Inertia and quality are excessive, affect transient state and the steady-state behaviour of whole rotor assembly, cause turbocharger sluggish and other performances
Problem, due to Engine Downsizing, it is desirable to power density increasing, speed at maximum torque require more and more lower, current whirlpool
Rotary inertia and the excessive problem of quality of wheel can increasingly highlight.
To this end, the lightweight of turbine material is a research direction, use more preferable aviation grade material, such as titanium-aluminium alloy
Casting turbine is a good selection.Its high mechanical properties, high-temperature resistant characteristic, and highly corrosion resistant ability can be good at
Meet the use requirement of vehicle turbocharger, and its density declines about 40～50%, it is possible to be significantly reduced turning of rotor
Dynamic inertia, brings significant performance boost, particularly mapping to promote to turbocharger.But titanium-aluminum alloy turbine and steel
It is big that the welding of material intermediate rotary shaft is always a technical barrier, welding difficulty and cost, and it is raw that reliability cannot meet high-volume
The demand produced.
Summary of the invention
Because the deficiencies in the prior art, the technical problem to be solved is to find the rotating shaft of a kind of replacement and turbine
The attachment structure being welded to connect.
For achieving the above object, the present invention uses novel screw connection structure, replaces welding procedure, effectively connects whirlpool
Wheel and rotating shaft, thus avoid the difficulty in welding procedure, and the most therefore can serve extra value and advantage by band.Tool
Body ground, the technical scheme that the present invention provides is as follows:
A kind of attachment structure of vehicle turbocharger turbine and rotating shaft, attachment structure includes rotating shaft and turbine, rotating shaft and
Turbine is threadably secured connection.
Preferably, one end of rotating shaft has protuberance, and turbine has the blind hole accommodating protuberance, and protuberance and blind hole are respectively provided with can
The external screw thread cooperated and female thread.
Further, rotating shaft is provided with can accommodate the groove of piston ring.
Preferably, turbine has connecting portion, and connecting portion extends from the center of turbine to rotating shaft side, and blind hole is positioned at connecting portion
In.
Further, connecting portion is provided with can accommodate the groove of piston ring.
Preferably, the female thread both sides of blind hole and the external screw thread both sides of protuberance are additionally provided with the one group of guide part that can cooperate
Position, is used for making rotating shaft keep high concentricity with turbine, and this one group of guiding position that can cooperate uses interference fit.
Preferably, interference fit uses the mode of point cantact mode or stepwise manner or point cantact and staged combination.
Preferably, in point cantact mode, the cross section of protuberance is class polygon；Class polygonal limit number can straight according to rotating shaft
Footpath adjusts.
Preferably, the cross section of protuberance is class triangle or class tetragon.
Preferably, turbine has protuberance, and protuberance extends from turbine center to rotating shaft side, and it is convex that one end of rotating shaft has receiving
The blind hole in portion, protuberance and blind hole are respectively provided with the external screw thread and female thread that can cooperate.
Further, the female thread both sides of blind hole and the external screw thread both sides of protuberance are additionally provided with the one group of guiding that can cooperate
Position, is used for making rotating shaft keep high concentricity with turbine, and this one group of guiding position that can cooperate uses interference fit.
Preferably, interference fit uses the mode of point cantact mode or stepwise manner or point cantact and staged combination.
Further, rotating shaft is provided with can accommodate the groove of piston ring.
Preferably, the fastening direction of screw thread is identical with the work rotation direction of turbine.
The vehicle turbocharger turbine that the present invention provides solves prior art on welding with the attachment structure of rotating shaft
Technical barrier, can apply and simplify production technology in prior art designs and reduce manufacturing cost, or apply in titanium-aluminium alloy whirlpool
In wheel application, solve and the problem that difficulty is high is welded in steel rotating shaft.Compared with prior art, technology provided by the present invention has
Advantages below:
1, the present invention uses threaded mode, avoids welding, it is ensured that it is also ensured that productivity while quality；
2, the present invention increases the pilot hole of interference fit before and after screw thread, it is ensured that rotating shaft and turbine less connection away from
From interior holding alignment；
3, the turbine of the present invention coordinates employing point cantact mode with rotating shaft, both can guarantee that alignment, and had decreased interference simultaneously
Contact area, reduces frictional force, can reduce the difficulty of installation；Point cantact mode decreases contact area simultaneously, it is possible to
Reduce the heat that turbine is delivered in rotating shaft；
4, the turbine of the present invention coordinates employing stepwise manner with rotating shaft, plays the effect of dual guiding, it is ensured that rotating shaft
With turbine in less connection apart from interior holding alignment；
5, the turbine of the present invention coordinates the mode using point cantact with staged combination with rotating shaft, plays dual guide effect
While, it is ensured that alignment, decrease Interference contact area, reduce frictional force, reduce the difficulty installed；
6, entirety of the present invention uses blind hole design, it is to avoid have a negative impact the structural strength of turbine；
7, the present invention uses threaded, and the technological process increased because of welding can save, and reduces the one-tenth of whole production
Basis and beat, save the operation of assembling process；
8, the present invention uses threaded, can avoid ultrasound examination, simplifies manufacturing process, improves production efficiency；
9, the present invention uses threaded, can save welding stress release process, simplify assembly process, improve and produce
Efficiency；
10, the present invention uses threaded, can loosen dynamically balanced requirement, improve the qualification rate of product, reduces raw
Produce cost；
11, the present invention uses threaded, and closure gasket groove directly can be processed in rotating shaft or turbine producer, and enters
The installation of row sealing ring, so can save assembly process, improves production efficiency；
Below with reference to accompanying drawing, the method for the present invention and the technique effect of generation are described further, to be fully understood from
The purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of vehicle turbocharger agent structure
Fig. 2 is vehicle turbocharger rotating shaft and turbine Welding Structure schematic diagram
Fig. 3 is the turbine schematic diagram with the first attachment structure of rotating shaft of embodiments of the invention 1
Fig. 4 is the turbine schematic diagram with the second attachment structure of rotating shaft of embodiments of the invention 1
Fig. 5 is the turbine schematic diagram with the attachment structure of rotating shaft of embodiments of the invention 2
Fig. 6 is the rotating shaft schematic diagram with the point cantact fit system of turbine of the present invention
Fig. 7 is the class triangular structure schematic diagram of the protuberance of the rotating shaft of the present invention
Fig. 8 is the class quadrilateral structure schematic diagram of the protuberance of the rotating shaft of the present invention
Fig. 9 is the rotating shaft schematic diagram with the staged fit system of turbine of the present invention
Figure 10 is three grades of stepped shape schematic diagrams of the protuberance of the rotating shaft of the present invention
Detailed description of the invention
The vehicle turbocharger turbine that the present invention provides uses the company of double guide thread blind hole with the attachment structure of rotating shaft
Access node structure, replaces welding procedure, connects titanium alloy turbine and steel shafts, avoids the technological difficulties of welding.
Embodiment 1
The vehicle turbocharger turbine of the present embodiment and the attachment structure of rotating shaft include rotating shaft 10 and turbine 20, such as Fig. 3
Shown in.One end of rotating shaft 10 has protuberance 11, and protuberance 11 is provided with external screw thread.Have on turbine 20 and can match with protuberance 11
Blind hole 21, be provided with female thread in blind hole 21 so that turbine 20 can be threadably secured with rotating shaft 10 and be connected, threaded
Fastening direction is identical with the work rotation direction of turbine so that turbine has self-locking ability with the attachment structure of rotating shaft, permissible
Avoid the connection keeping solid and reliable that gets loose in work process.The female thread of blind hole 21 and the external screw thread both sides of protuberance 11 are also divided
Not being provided with the one group of guiding position 22 that can cooperate, this one group of guiding position 22 that can cooperate is arranged to interference and joins
Close, there is certralizing ability, it is ensured that rotating shaft keeps high concentricity with turbine in limited connection distance, thus controls whole
The rotation amount of unbalance of rotor maintains extremely low level.So that it is easy for installation, near the guiding of blind hole opening side
Position diameter is somewhat larger, in order to avoid protuberance cannot be installed in blind hole during actual installation.Threaded knot due to the present embodiment
Structure uses blind hole design, it is also possible to avoid this attachment structure for the excessive impact of turbine structure intensity, it is ensured that reliability.
In order to reduce the blind hole impact on turbine structure intensity further, the turbine 20 in the present embodiment also can be near turning
Axle side arranges the connecting portion 23 of projection, as shown in Figure 4.This connecting portion 23 extends from the center of turbine 20 to rotating shaft 10 side,
It is located in intermediate 4 and heat shield 5.Blind hole 21 is arranged on connecting portion 23, with the protuberance 11 in rotating shaft 10 by screw thread even
Connect fixing.Piston mounting groove can be preset on connecting portion 23 and seal structure.
Embodiment 2
The vehicle turbocharger turbine of the present embodiment and the attachment structure of rotating shaft include rotating shaft 10 and turbine 20, such as Fig. 5
Shown in.The present embodiment is contrary with the set-up mode of embodiment 1, and rotating shaft 10 is provided with blind hole 12, is provided with interior spiral shell in blind hole 12
Stricture of vagina.And there is on turbine 20 protuberance 24, protuberance 24 is provided with external screw thread so that turbine 20 can be with rotating shaft 10 company of being threadably secured
Connecing, the most threaded fastening direction is identical with the work rotation direction of turbine so that turbine has with the attachment structure of rotating shaft
There is self-locking ability, the connection keeping solid and reliable that gets loose in work process can be avoided.The female thread of blind hole 12 and protuberance
The external screw thread both sides of 24 further respectively have the one group of guiding position 13 that can cooperate, this one group of guiding position that can cooperate
13 are arranged to interference fit, it is ensured that in limited connection distance, intermediate rotary shaft keeps high concentricity with turbine, thus
The rotation amount of unbalance controlling whole rotor is helped to maintain extremely low level.So that easy for installation, open near blind hole
The guiding position diameter of mouth side is somewhat larger, in order to avoid protuberance cannot be installed in blind hole during actual installation.
For the ease of installing, either using embodiment 1 or the connected mode of embodiment 2, protuberance is all right with blind hole
Use point cantact or stepped fit system, while ensureing the positioning action at guiding position, reduce interference fit band with this
The increase of the frictional force come.It is the guide part site way of contact fit system of protuberance and blind hole as shown in figs 6-8, now protuberance
Cross section be class polygonized structure, protuberance in this preferred embodiment uses class triangle and class quadrilateral structure, maintains convex
In portion, external screw thread both sides guides position and the guiding position at least three point contact of female thread both sides in blind hole so that middle turn
Axle keeps high concentricity with turbine.It is the guiding position staged fit system of protuberance and blind hole as shown in figs. 9-10, now turns
Three grades of staged protuberance designs on axle serve the effect of dual guiding, it is ensured that rotating shaft and turbine are in less connection distance
Interior holding alignment.In other implementations, protuberance and blind hole also can use point cantact mode to combine with stepwise manner
Fit system, to reduce the problem that the frictional force that interference fit brings increases while alignment improving further.
Compared with the welding connecting mode of prior art, the thread connecting mode that the present invention provides has a lot of advantage.Adopt
With being welded to connect, necessarily causing the internal stress of welding position, this internal stress can be adjoint during the use of turbocharger
Temperature and the rotation speed change of alternation progressively discharge, and cause rotor balancing level progressively to deteriorate thus the noise problem brought
Even lost efficacy.So in welding procedure, the essential objective reality needing to consider this Stress Release, thus with special
Fabrication evaluation welding quality avoids defect, simultaneously need to use suitable process as far as possible after welding completes dynamic balancing repair
The internal stress that before just, release welding causes.Use the screw connection structure of the present invention, it is to avoid the process of welding, be able to from all
On avoid this problem, simplify detection and the technological process of release internal stress, accelerate productive temp and reduce cost.
The Second Problem of welding stress release is, in the fabrication process, since it is considered that the progressively release of internal stress is led
The deterioration of the rotor dynamic balancing caused, is forced on new product by the manufacturer's standard adding amount of unbalance processed of keeping under strict control, ensures product
Limit not over the balance allowed in whole life cycle.Use the screw connection structure of the present invention, it is to avoid welding procedure
The internal stresses release problem necessarily brought with it so that without because it is contemplated that add the problem made of keeping under strict control so that in the fabrication process
Requirement of balance reduce, reduce manufacturing cost, including can reduce to manufacture equipment demand, reduce and produce into
This.
Further, since without prepackage between intermediate rotary shaft and turbine, such that it is able to use same axle simultaneously for difference rotation
The turbine turning direction uses (including clockwise and anticlockwise), and this, for reducing product parts number, stock's number etc., has
Place.
Finally, the piston ring mounting groove being used for sealing hydrocarbons can be pre-machined at turbine (when using as shown in Figure 4
During connected mode) or rotating shaft on (when use connected mode as shown in Fig. 3 or Fig. 5 time) because the Welder of prior art
During skill, it is contemplated that welding process necessarily causes deformation, so only after welding procedure, more individually do a piston ring groove
Processing.According to thread connecting mode, then can avoid this flow process, thus accelerate productive temp and reduce cost.
The preferred embodiment of the present invention described in detail above.Should be appreciated that the ordinary skill of this area is without wound
The property made work just can make many modifications and variations according to the design of the present invention.Therefore, all technical staff in the art
The most on the basis of existing technology by the available technology of logical analysis, reasoning, or a limited experiment
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a vehicle turbocharger turbine and the attachment structure of rotating shaft, it is characterised in that described attachment structure includes rotating shaft
With turbine, described rotating shaft and described turbine are threadably secured connection.
2. vehicle turbocharger turbine as claimed in claim 1 and the attachment structure of rotating shaft, one end of wherein said rotating shaft
Having protuberance, described turbine has the blind hole accommodating described protuberance, described protuberance and described blind hole and is respectively provided with and can cooperate
External screw thread and female thread.
3. vehicle turbocharger turbine as claimed in claim 1 and the attachment structure of rotating shaft, wherein said turbine has even
Meeting portion, described connecting portion extends from the center of described turbine to described rotating shaft side, and described blind hole is positioned in described connecting portion.
4. the attachment structure of as claimed in claim 2 or claim 3 vehicle turbocharger turbine and rotating shaft, wherein said blind hole interior
The external screw thread both sides of screw thread both sides and described protuberance are additionally provided with can cooperate one group guiding position, described cooperate
One group guides position and uses interference fit.
5. vehicle turbocharger turbine as claimed in claim 4 and the attachment structure of rotating shaft, wherein said interference fit is adopted
The mode combined with staged with point cantact mode or stepwise manner or point cantact.
6. vehicle turbocharger turbine as claimed in claim 5 and the attachment structure of rotating shaft, wherein said point cantact mode
Described in the cross section of protuberance be class polygonized structure.
7. vehicle turbocharger turbine as claimed in claim 1 and the attachment structure of rotating shaft, wherein said turbine has convex
Portion, described protuberance extends to described rotating shaft side from described turbine center, and one end of described rotating shaft has the described protuberance of receiving
Blind hole, described protuberance and described blind hole are respectively provided with the external screw thread and female thread that can cooperate.
8. vehicle turbocharger turbine as claimed in claim 7 and the attachment structure of rotating shaft, the interior spiral shell of wherein said blind hole
The external screw thread both sides of stricture of vagina both sides and described protuberance are additionally provided with can cooperate one group guiding position, described cooperate one
Group guides position and uses interference fit.
9. vehicle turbocharger turbine as claimed in claim 7 and the attachment structure of rotating shaft, wherein said interference fit is adopted
The mode combined with staged with point cantact mode or stepwise manner or point cantact.
10. vehicle turbocharger turbine as claimed in claim 1 and the attachment structure of rotating shaft, the fastening of wherein said screw thread
Direction is identical with the rotation direction of described turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610756132.6A CN106285787A (en) | 2016-08-29 | 2016-08-29 | A kind of vehicle turbocharger turbine and the attachment structure of rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610756132.6A CN106285787A (en) | 2016-08-29 | 2016-08-29 | A kind of vehicle turbocharger turbine and the attachment structure of rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106285787A true CN106285787A (en) | 2017-01-04 |
Family
ID=57674334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610756132.6A Pending CN106285787A (en) | 2016-08-29 | 2016-08-29 | A kind of vehicle turbocharger turbine and the attachment structure of rotating shaft |
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| CN (1) | CN106285787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996309A (en) * | 2017-03-24 | 2017-08-01 | 中国北方发动机研究所(天津) | A kind of ceramic rotating shaft of supercharger turbine and its moulding process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4445296C1 (en) * | 1994-12-19 | 1996-08-22 | Man B & W Diesel Ag | Radial compressor wheel impeller having low noise level |
| CN103410877A (en) * | 2013-09-05 | 2013-11-27 | 中国北方发动机研究所(天津) | Method for connecting titanium aluminum turbine and steel shaft |
| WO2015002141A1 (en) * | 2013-07-05 | 2015-01-08 | 株式会社Ihi | Turbine shaft and supercharger |
| WO2015138183A1 (en) * | 2014-03-11 | 2015-09-17 | Borgwarner Inc. | Compressor wheel-shaft assembly |
-
2016
- 2016-08-29 CN CN201610756132.6A patent/CN106285787A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4445296C1 (en) * | 1994-12-19 | 1996-08-22 | Man B & W Diesel Ag | Radial compressor wheel impeller having low noise level |
| WO2015002141A1 (en) * | 2013-07-05 | 2015-01-08 | 株式会社Ihi | Turbine shaft and supercharger |
| CN103410877A (en) * | 2013-09-05 | 2013-11-27 | 中国北方发动机研究所(天津) | Method for connecting titanium aluminum turbine and steel shaft |
| WO2015138183A1 (en) * | 2014-03-11 | 2015-09-17 | Borgwarner Inc. | Compressor wheel-shaft assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996309A (en) * | 2017-03-24 | 2017-08-01 | 中国北方发动机研究所(天津) | A kind of ceramic rotating shaft of supercharger turbine and its moulding process |
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Application publication date: 20170104 |
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