CN104989462A - Variable-section nozzle ring, as well as control method and technological scheme thereof - Google Patents
Variable-section nozzle ring, as well as control method and technological scheme thereof Download PDFInfo
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- CN104989462A CN104989462A CN201510322163.6A CN201510322163A CN104989462A CN 104989462 A CN104989462 A CN 104989462A CN 201510322163 A CN201510322163 A CN 201510322163A CN 104989462 A CN104989462 A CN 104989462A
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Abstract
The invention relates to a variable-section nozzle ring, as well as a control method and technological scheme thereof. The variable-section nozzle ring is characterized by comprising a nozzle ring and nozzle ring blades uniformly distributed on the nozzle ring, wherein a guide ring approaching to or leaving away the lateral side of the nozzle ring is arranged at the periphery of the nozzle ring blades in a sleeving manner. The variable-section nozzle ring is designed, the manufacturing cost of the variable-section nozzle ring can be improved to a certain degree; besides, the manufacturing cost of the variable-section nozzle ring can be reduced to a certain degree, and the using stability and the using reliability of the variable-section nozzle ring are improved.
Description
technical field:
The present invention relates to a kind of nozzle ring capable of changing cross sections and controlling method thereof and process program.
background technique:
The use of Vehicular waste gas turbosupercharger, has had significant progress at home in nearly ten years.Along with the improving constantly of customer requirement, the updating of the domestic continuous severization to environmental requirement, turbocharger design technology, according to the actual state that vehicle uses, nozzle ring capable of changing cross sections technology is taked to become the road of certainty.As everyone knows, vehicle in the actual travel process of road surface, along with the change (particularly traffic condition in city) of condition of road surface, under the actual travel speed of vehicle is usually in lower-speed state.But, in vehicle turbocharger design process, in order to give full play to efficiency and the principle of sound accounting of motor, under the state that the design maximum speed of turbosupercharger must be set in Engine full load.Meanwhile, turbosupercharger with Engine Matching process, 70-80% position when usually the peak efficiency of gas compressor being set in full load condition.The exhaust gas flow (speed treated by the motor namely usually said) of discharging due to actual speed and the motor of turbosupercharger and temperature have direct relation.Therefore, under low engine speed working condition, under the waste gas of low discharge capacity directly causes the rotating speed of turbosupercharger to be in lower-speed state equally, this will directly have influence on the normal work (gas compressor brings out the air that mouth cannot form higher pressure gas) of turbosupercharger, therefore greatly have impact on the working efficiency of turbosupercharger under low engine speed state.
According to this situation, professional production producer devises the nozzle ring structure of variable cross section especially.The principle of this structure is: when motor works under lower-speed state, by reducing the air outlet area of pressurized machine nozzle ring, under low flow state, nozzle area increase gas pressure intensity is reduced to reach turbine end, improve the working speed of turbine rotor, increase gas compressor and bring out the gas pressure of gas port, so as to improving the working efficiency of turbosupercharger under low engine speed state.
The project organization of conventional nozzle ring capable of changing cross sections has following two kinds of mode of structure usually at present:
1., by the pressure angle of adjustment nozzle blade, to change the actual circulation diameter (namely we usually said φ d value) of nozzle blade air outlet, and change the air outlet area of nozzle ring.To reach the significantly reduction along with engine speed, the rotating speed of turbine rotor can not reduce thereupon (in a certain degree scope), thus the efficiency of turbosupercharger under improving low engine speed state.The nozzle ring capable of changing cross sections of this structure, in the design process, because nozzle blade needs to possess spinfunction, therefore blade rotary axle and nozzle blade bore are designed to small―gap suture mated condition, guarantee that the spinfunction of nozzle vane is carried out smoothly, the nozzle vane caused because gap is bigger than normal must be avoided simultaneously to produce warpage and cannot rotate.But, booster turbine end in normal operation, because the combustion gas exhaust gas temperature of motor discharge is usually about 600 degree (delivery temperatures of diesel engine), the temperature of such nozzle ring under actual working state is about 500-550 degree, under so high temperature regime, due to material and the structure difference at position each in nozzle ring parts, the difference of thermal expansion coefficient, the practical distortion amount of nozzle blade running shaft is made to be difficult to reach a determined value, gap width control overflow like this for running shaft and hole increases substantially, under production in enormous quantities condition (vehicle turbocharger must be in production in enormous quantities situation), stability and the reliability of this structure decrease (certainly can increase cost to improve stability and reliability by strict control).
2. by changing nozzle ring air outlet height, to change the air outlet area of nozzle ring, so as to reaching energy of assessing the services.This structure has two vital parts, that is: nozzle blade seat and guide collar.The nozzle ring capable of changing cross sections of this project organization that existing market has, what nozzle blade seat was taked is cast inblock, then by milling nozzle blade profile, require (namely nozzle blade design profile degree requires) with the gap width met in nozzle blade and guide collar.As everybody knows, this nozzle ring due to operating temperature very high, so design adopt material be founding type refractory alloy, the non-constant of cutting ability of this material, cause this blade seat process time and the cycle long, be difficult to meet mass production method.
summary of the invention:
In order to address this problem, the object of the present invention is to provide a kind of nozzle ring capable of changing cross sections and controlling method thereof and process program, this nozzle ring capable of changing cross sections structure is simple, reasonable in design, is conducive to the stability and the reliability that reduce fabricating cost and improve nozzle ring capable of changing cross sections use.
Nozzle ring capable of changing cross sections of the present invention, is characterized in that: comprise nozzle ring and be distributed on nozzle blade on nozzle ring, nozzle blade outer race be provided with a relative nozzle ring side near or away from guide ring.
Further, said nozzle ring is fixedly connected with two adjustable levers, described two adjustable lever ends are connected on a U-shaped shift fork, are located on a rocking-turn arm on rear side of the interruption of described U-shaped shift fork.
Further, above-mentioned rocking-turn arm is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
Further, said nozzle ring material is 316L, and nozzle blade adopts powder metallurgy superalloy material, and nozzle blade and nozzle ring are fixed by riveting method.
The controlling method of nozzle ring variable cross section of the present invention, is characterized in that: comprise nozzle ring and be distributed on nozzle blade on nozzle ring, nozzle blade outer race be provided with a relative nozzle ring side near or away from guide ring; When engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
Further, above-mentioned rocking-turn arm is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
The present invention is by changing the axial displacement of nozzle ring and nozzle blade, the circulation actual height of adjustment nozzle ring trailing edge blade, to change the trailing edge throat area of (reduce or increase) nozzle ring, reach the desirable area of nozzle ring wanting with the real work rotating speed of motor to mate.Specific works situation is as follows: when engine speed is reduced (to a certain extent), control system obtains signal, driven by motor rocking-turn arm is rotated, rotary motion is converted to straight line motion by shifting fork structure, adjustable lever and nozzle ring is driven to do straight line motion, and guide ring immobilizes, cause nozzle ring and guide ring spacing H value to reduce, nozzle ring throat area reduces.
When engine speed rises, system does counteragent, then nozzle ring and guide ring spacing H value increase, and nozzle ring throat area increases.
The feature of nozzle ring capable of changing cross sections structure of the present invention is:
A, nozzle ring and nozzle blade are divided into two parts, blade adopts powder metallurgy superalloy material, and nozzle ring adopts stainless steel material.Like this, cost of material (design of former nozzle ring adopt be integral high-temperature alloy) can significantly be reduced.
B, nozzle blade adopt the mode of powder metallurgy directly to obtain finished product, and leaf type profile tolerance of a surface requires that 0.03mm can meet completely.The defect that the difficulty large period length due to refractory alloy cutting can be avoided like this to produce in batches is solved.Under the prerequisite by disposable input (powder metallurgy die expense), production in enormous quantities can effectively be met, and design of part dimensional stability is good simultaneously.
The design of this structure can improve the fabricating cost of nozzle ring capable of changing cross sections to a certain extent, certain depth reduces the fabricating cost of nozzle ring capable of changing cross sections simultaneously, improves stability and the reliability of nozzle ring capable of changing cross sections use.
accompanying drawing illustrates:
Fig. 1 is side view of the present invention;
Fig. 2 is D structure schematic diagram of the present invention;
Fig. 3 is the sectional drawing of nozzle ring of the present invention and nozzle blade.
embodiment:
Below in conjunction with accompanying drawing and actual mode of execution, the present invention is described in further detail.
Nozzle ring capable of changing cross sections of the present invention, comprises nozzle ring 1 and is distributed on the nozzle blade 2 on nozzle ring 1, nozzle blade 2 outer race be provided with a relative nozzle ring side near or away from guide ring 3.
Further, said nozzle ring is fixedly connected with two adjustable levers 4, described two adjustable lever 4 ends are connected on a U-shaped shift fork 5, are located on a rocking-turn arm 6 on rear side of the interruption of described U-shaped shift fork 5.
Further, above-mentioned rocking-turn arm 6 is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.Make rocking-turn arm 6 rotation under electric machine rotation, drive adjustable lever and nozzle ring, nozzle blade to move axially, guide ring 3 is relatively fixing.
Further, said nozzle ring material is 316L, and nozzle blade adopts powder metallurgy superalloy material (as FGH135), and nozzle blade and nozzle ring are fixed by riveting method.
Nozzle ring of the present invention
nozzle ring capable of changing cross sections and controlling method thereof and process program, comprise nozzle ring 1 and be distributed on the nozzle blade 2 on nozzle ring 1, nozzle blade 2 outer race be provided with a relative nozzle ring side near or away from guide ring 3; When engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
Further, above-mentioned rocking-turn arm is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
The present invention is by changing the axial displacement of nozzle ring and nozzle blade, the circulation actual height of adjustment nozzle ring trailing edge blade, to change the trailing edge throat area of (reduce or increase) nozzle ring, reach the desirable area of nozzle ring wanting with the real work rotating speed of motor to mate.Specific works situation is as follows: when engine speed is reduced (to a certain extent), control system obtains signal, driven by motor rocking-turn arm is rotated, rotary motion is converted to straight line motion by shifting fork structure, adjustable lever and nozzle ring is driven to do straight line motion, and guide ring immobilizes, cause nozzle ring and guide ring spacing H value to reduce, nozzle ring throat area reduces.
When engine speed rises, system does counteragent, then nozzle ring and guide ring spacing H value increase, and nozzle ring throat area increases.
Consider that nozzle blade rotates the processing and manufacture difficulty and cost brought, select to take to change nozzle height thus the mode changing nozzle ring area.Because integral nozzle ring (mentioning above) difficulty of processing is large, cost is high, is difficult to the cause produced in batches, now adopts nozzle vane and nozzle ring Split type structure mode, to reduce manufacture cost, is suitable for producing in enormous quantities.This nozzle blade material selection powder metallurgy superalloy, directly obtains finished product by the mode of powder metallurgy; Nozzle ring adopts 316L stainless steel material, after machining, nozzle vane and nozzle ring is riveted into an entirety by special riveting machine.
The feature of this structure is:
A, nozzle ring and nozzle blade are divided into two parts, blade adopts powder metallurgy superalloy material, and nozzle ring adopts stainless steel material.Like this, cost of material (design of former nozzle ring adopt be integral high-temperature alloy) can significantly be reduced.
B, nozzle blade adopt the mode of powder metallurgy directly to obtain finished product, and leaf type profile tolerance of a surface requires that 0.03mm can meet completely.The defect that the difficulty large period length due to refractory alloy cutting can be avoided like this to produce in batches is solved.Under the prerequisite by disposable input (powder metallurgy die expense), production in enormous quantities can effectively be met, and design of part dimensional stability is good simultaneously.
The design of this structure can improve the fabricating cost of nozzle ring capable of changing cross sections to a certain extent, certain depth reduces the fabricating cost of nozzle ring capable of changing cross sections simultaneously, improves stability and the reliability of nozzle ring capable of changing cross sections use.
Nozzle ring is in normal work, and the gas that blade passage (circulation between blade and blade) flows through is the combustion gas waste gas that motor is discharged.For diesel engine, the exhaust gas temperature of discharging is the highest 600 degree, so turbocharger design parameter Maximum operating temperature is 620 degree; And the gas flow of circulation is close to the flow of compressor casing air outlet.Under such working state, usually adopt good stainless steel material (as: 316L or 310S etc.), can meet use completely.Its reason is: such stainless steel, operating temperature more than 600 degree after, mechanical property starts significantly to decline; And before 600 degree, mechanical property can not produce and significantly change.; consider that nozzle ring in actual use; on the one hand due to the structure of nozzle vane; trailing edge Thickness Ratio thinner (current GL351 nozzle vane trailing edge thickness is 0.6mm); under normal working temperature condition (550-600 degree), the yield strength value of nozzle vane trailing edge can not meet usage requirement (other position is this problem not); Second aspect, owing to containing a certain amount of sulphur in diesel engine combustion gas waste gas, this element is combined with oxygen and forms sulfur oxide (SO), has stronger corrosivity, and this corrosivity will cause the working life of nozzle ring.
Therefore, based on above-mentioned 2 points, what nozzle ring (entirety) design adopted is refractory alloy, its object is the yield strength value (under integrality, design uses K413 founding type refractory alloy) under the raising condition of high temperature on the one hand, the operating temperature of this material is more than 950 degree, and mechanical property starts significantly to decline.After design improvement, nozzle vane takes superalloy powder metallurgy technology (material FGH135), marks with GH135(former capital) high-temperature mechanical property basically identical, its high-temperature mechanical property is about better than K418, can meet usage requirement completely.And nozzle ring materials'use 316L, structure based and usability problem, adopt 316L can meet usage requirement.
Certainly, selecting this two classes material not possess uniqueness, is also to substitute if any better material.Consider the cost of Material selec-tion and the versatility of Materials Selection, therefore select this two classes material.
Claims (6)
1. a nozzle ring capable of changing cross sections, is characterized in that: comprise nozzle ring and be distributed on nozzle blade on nozzle ring, nozzle blade outer race be provided with a relative nozzle ring side near or away from guide ring.
2. nozzle ring capable of changing cross sections according to claim 1, is characterized in that: described nozzle ring is fixedly connected with two adjustable levers, and described two adjustable lever ends are connected on a U-shaped shift fork, are located on a rocking-turn arm on rear side of the interruption of described U-shaped shift fork.
3. nozzle ring capable of changing cross sections according to claim 1, is characterized in that: described rocking-turn arm is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
4. nozzle ring capable of changing cross sections according to claim 1, is characterized in that: described nozzle ring material is 316L, and nozzle blade adopts powder metallurgy superalloy material, and nozzle blade and nozzle ring are fixed by riveting method.
5. a controlling method for nozzle ring variable cross section, is characterized in that: comprise nozzle ring and be distributed on nozzle blade on nozzle ring, nozzle blade outer race be provided with a relative nozzle ring side near or away from guide ring; When engine speed reduces, make nozzle ring near guide ring; When engine speed increases, make nozzle ring away from guide ring.
6. the controlling method of nozzle ring variable cross section according to claim 5, is characterized in that: described rocking-turn arm is driven by motor, and when engine speed reduces, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect near guide ring; When engine speed increases, motor drives rocking-turn arm to make nozzle ring under U-shaped shift fork effect away from guide ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510322163.6A CN104989462A (en) | 2015-06-12 | 2015-06-12 | Variable-section nozzle ring, as well as control method and technological scheme thereof |
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| CN201510322163.6A CN104989462A (en) | 2015-06-12 | 2015-06-12 | Variable-section nozzle ring, as well as control method and technological scheme thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304709A (en) * | 2016-04-19 | 2017-10-31 | 霍尼韦尔国际公司 | Centrifugal-flow compressor for the adjustable Trim of turbocharger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304709A (en) * | 2016-04-19 | 2017-10-31 | 霍尼韦尔国际公司 | Centrifugal-flow compressor for the adjustable Trim of turbocharger |
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Application publication date: 20151021 |