CN101560909A - Flow-guiding turbocharger - Google Patents
Flow-guiding turbocharger Download PDFInfo
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- CN101560909A CN101560909A CNA2009100496576A CN200910049657A CN101560909A CN 101560909 A CN101560909 A CN 101560909A CN A2009100496576 A CNA2009100496576 A CN A2009100496576A CN 200910049657 A CN200910049657 A CN 200910049657A CN 101560909 A CN101560909 A CN 101560909A
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Abstract
The invention discloses a flow-guiding turbocharger which is applicable to a vehicle turbocharged engine so as to improve low working condition performance and transient characteristic and can meet the requirements of the full-speed working condition characteristics. The flow-guiding turbocharger mainly consists of a common regular-structured vehicle small streamflow (mixed) turbocharger and two valves which are a charge air flow-guiding valve and an exhaust gas bypass valve. Part of charge air flowing out from a branch pipe bypass of an outlet of an air compressor with low working condition flows into a flow-guiding air channel of an inlet pipe of the volute casing of the turbocharger by the air flow-guiding valve, gas supply is implemented to the gas flowing into the impeller of the turbocharger and the power of the turbocharger and the boost pressure are improved. While in high working condition, the gas discharging is implemented to the exhaust gas by the gas bypass valve so as to restrict the increase of boosted pressure. Compared with the prior art, the flow-guiding turbocharger has the advantages of mature technique, simple structure, low cost, large adjusting and controlling force and wide range.
Description
Technical field
The present invention relates to the turbosupercharger in car, the boosting internal combustion engine technical field peculiar to vessel.
Background technique
Turbocharging technology has unrivaled advantage to internal-combustion engine improving power, reduce fuel consumption and satisfy aspect such as environmental requirement.But because of boosting internal combustion engine is the compound cooperation of the internal-combustion engine of the turbosupercharger of rotating type impeller machinery and reciprocating piston machinery, because the characteristic difference of two kinds of machineries itself, though the two has realized excellent good coupling under the parameter of a certain operating mode of internal-combustion engine (rotating speed, load), also certainly will after changing, duty parameter can cause the incompatibility of mating between turbosupercharger and the internal-combustion engine.For the boosting internal combustion engine of pressing internal-combustion engine declared working condition parameter matching, because the boost pressure of boosting internal combustion engine and air mass flow not only are subjected to the influence of internal-combustion engine rotational speed, also be subjected to effects of load, therefore, when internal-combustion engine when the low speed and load operating mode turns round, boost pressure and air mass flow reduce rapidly.The reduction of boost pressure will cause air inflow can not satisfy the requirement of cylinder fuel perfect combustion required air quantity, thereby produces over-emitting black exhaust, excessive discharge temperature, low speed torque is less and adverse consequences such as specific fuel consumption height.The phenomenon that the excellent good coupling of this high, low speed operating mode supercharging is difficult to take into account is particularly outstanding to duty parameter (rotating speed, the load) car that excursion is big, boosting internal combustion engine peculiar to vessel.
Above-mentioned analysis explanation, for marine engine, Vehicular internal combustion engine particularly, if an amount of requirement of supercharging when pressurization system has satisfied high rotating speed, then air feed will be not enough when the slow-speed of revolution; Otherwise, if the air demand when having satisfied the slow-speed of revolution is then just may supercharging when high rotating speed excessive.Therefore, must adopt some improvement measures, could alleviate the contradiction that this high, low speed operating mode can not satisfy good good coupling simultaneously, turbosupercharger and turbo charge systems such as the high-speed working condition venting that prior art adopts, flow-guiding turbocharger, change geometric cross section turbine, intake and exhaust bypass, sequential pressurizing all are the effective ways that improve internal-combustion engine low (rotating speed, load) performance of operating condition.And the part pressurized air drainage that gas compressor end own is emitted is to the so-called flow-guiding turbocharger of its turbine end, and its function, characteristics, effect and potentiality of improving low-speed performance especially attract people's attention.See also Zhu Daxin about the structure of flow-guiding turbocharger and performance introduction and write related content in the 434th～435 page of " turbosupercharging and turbosupercharger " Beijing Machinery Industry publishing house 1992.
The main purpose of flow-guiding turbocharger is in order to realize the no surge work of gas compressor, and then the moment of torsion when improving internal-combustion engine low speed, the rated power when meanwhile still keeping the internal-combustion engine high speed.The function of flow-guiding turbocharger and low operating mode intake and exhaust bypass turbo charge system (referring to the 144th page of Lu Jiaxiang chief editor " diesel turbocharging technology " Beijing Machinery Industry publishing house 1999) are basic identical, but the former ability better than latter's effect, that improve low speed torque is stronger.Because prior art flow-guiding turbocharger and internal-combustion engine are all pressed declared working condition (rotating speed, load) parameter matching, and in, the tonifying Qi of low speed operating mode air conduction, so the size of the flow passage component of the turbine of flow-guiding turbocharger and gas compressor is also all bigger.When internal-combustion engine when slow-speed of revolution operating mode is moved, also just need the corresponding bigger bypass drainage air of quantity to the turbine tonifying Qi, slowly reduce the boost pressure that is produced and descend because of the descend turbine working medium flow that causes of internal-combustion engine rotational speed with pressing down with compensation.Like this, unless flow-guiding turbocharger can have very big drainage air compensation in the low operating mode of internal-combustion engine, otherwise can be because its through-flow size is bigger, and can not as automobile-used small-sized footpath (mixing) stream turbosupercharger (it is small-sized that it is through-flow), can provide sufficiently high boost pressure, thereby obtain than high pulling torque in low operating mode.These characteristics of prior art flow-guiding turbocharger, (the boost pressure fall of slow-speed of revolution operating mode in this case, is little) improves low working characteristics and adopts when making it be suitable for very much the not very big big or middle power internal-combustion engine of rotation speed change scope and move by propeller characteristic; And be not suitable for when all very big Vehicular internal combustion engine of rotating speed, load variations scope moves by speed characteristics, improve in the situation of its low-load performance and adopt, because the boost pressure range of decrease at this moment is very big, the differential static pressure that order drives the drainage tonifying Qi is very little, cause the drainage air quantity also corresponding very little, the result causes drainage to improving the gain sharp fall of low-load performance.
In addition, drainage (venting) structure that is adopted at the prior art flow-guiding turbocharger (also is, through on diffuser walls and diffuser vane, opening the venting line of rabbet joint and the boring of cutting, part pressurized air drainage to the boring on the thermal baffle at the turbine wheel back side that compressor impeller flows out is jetted to turbine wheel) technological scheme in, exist bigger restriction loss, this has just directly reduced the Diffuser of driving drainage tonifying Qi and the air-flow static pressure pressure reduction between the turbine wheel, makes the drainage air mass flow reduce and can not effectively utilize the kinetic energy of drainage air.
Summary of the invention
In order to eliminate the above-mentioned shortcoming and its effect of reduction that prior art flow-guiding turbocharger structure exists, the coupling of flow-guiding turbocharger and Vehicular internal combustion engine can be similar to satisfy internal-combustion engine (also to be by the needs of full-load speed characteristic (external characteristics) operation, when the Vehicular internal combustion engine rotating speed changes, the pressure ratio of turbosupercharger is answered approximate constant---referring to the 139th page of Lu Jiaxiang chief editor " diesel turbocharging technology " Beijing Machinery Industry publishing house 1999), thereby it can be applied to Vehicular internal combustion engine, the invention provides a kind of flow-guiding turbocharger new structure with this function.Technological core of the present invention is: its turbine volute exports the design and the structure of near the whole inlet tube part of throat (the runner zero degree cross section) from suction flange to inlet tube, has adopted turbine volute inlet tube design and the structure all inequality that flows turbosupercharger with prior art flow-guiding turbocharger or the automobile-used footpath of traditional normal conventional structure (mixing).Also be, unlike only logical I. C. engine exhaust combustion gas in the prior art turbine volute inlet tube, but in the turbine volute inlet tube of the present invention's structure, except that the fuel gas pipeline of having arranged a specially logical I. C. engine exhaust, also allowing in the spiral case inlet pipe remaining flow area become one, have can be at the low (rotating speed of internal-combustion engine, load) logical drainage air during operating mode, and at high (rotating speed, load) change during operating mode logical bypass exhaust fuel gas the time disconnected, the time common conduit of logical function or through-flow interlayer (in this passage, drainage air and bypass exhaust fuel gas through-flow, cutout and empty, switching between the combustion gas, each is controlled according to the pressurized air bypass drainage modulating valve (or solenoid valve) and the exhaust fuel gas bypass regulator valve (or bleed valve) that preestablish the boost pressure excursion by one respectively).
The body structure of flow-guiding turbocharger of the present invention is except that the turbine volute inlet tube partly has above-mentioned special tectonic, the structure of remaining part all flows the structure identical (outside the pressurized machine body structure, the generally more common supercharger structure of drainage pressurized machine is also wanted many air conductions valve and two valves of combustion gas bypass valve and corresponding connecting pipeline) of turbosupercharger with the automobile-used footpath of prior art normal conventional (mixing).The situation that its turbine and gas compressor is designed by internal-combustion engine declared working condition parameter with the prior art flow-guiding turbocharger and select for use is different, near the duty parameter that flow-guiding turbocharger of the present invention system locates by (about 50% rated speed) the Maximum Torque operating mode on the internal-combustion engine external characteristics designs its turbine and gas compressor and selects for use, to guarantee that flow-guiding turbocharger can be little as size as automobile-used footpath (mixing) stream turbosupercharger, in light weight, rotor moment of inertia is little, thereby at the low (rotating speed of internal-combustion engine, load) operating mode can have higher boost pressure and in full rotating speed operating mode good acceleration be arranged all.
For the special tectonic at turbine volute inlet tube position, for the pressure ratio (or boost pressure) that makes flow-guiding turbocharger approximate constant all in the full rotating speed operating mode scope of internal-combustion engine external characteristics, the present invention adopts following manner to design and regulates and control:
● the area A that near turbine volute inlet tube outlet throat (the runner zero degree cross section) locates
0With long-pending footpath than (A/R)
0, the parameter and the selected spiral case structural forms (list/double flow channel) such as pressure, temperature, flow of pressing near the exhaust fuel gas of operating mode (80～100) % rated speed on the Vehicular internal combustion engine external characteristics, definite according to the conventional aerothermodynamic design method of turbine volute;
● the area A that near " pipe in the combustion gas " pipeline middle outlet throat (the runner zero degree cross section) of only logical I. C. engine exhaust combustion gas locates in the turbine volute inlet tube
1With long-pending footpath than (A/R)
1, generally press near the exhaust fuel gas parameter of the operating mode of about 30% rated speed on the Vehicular internal combustion engine external characteristics and determine according to the conventional aerothermodynamic design method of spiral case;
● the switching common conduit of drainage air/bypass exhaust fuel gas or through-flow interlayer, it then is A at the flow area that near spiral case inlet pipe outlet throat (the runner zero degree cross section) locates
2=A
0-(A
1+ A '
1), A ' in the formula
1The thick sectional area that occupies of combustion gas inner tubal wall for the throat place.
● pipe is arranged near the bigger outer wall place of spiral case channel radius spiral case inlet pipe planted agent as far as possible in the combustion gas, in the hope of obtaining less (A/R)
1Value helps the raising of the low operating mode boost pressure of internal-combustion engine.On the contrary, the drainage air/position of bypass exhaust fuel gas common conduit in the spiral case inlet pipe then should be arranged near the less inwall side of spiral case channel radius as far as possible.Like this, the air-flow static pressure that drainage air/bypass exhaust fuel gas flows out spiral case inlet pipe place is just very near the combustion gas static pressure of turbine wheel ingress, thereby help increasing the differential static pressure that drives drainage air tonifying Qi/bypass combustion gas venting, increase the tolerance of drainage air/bypass combustion gas venting, to increase that pressurized machine improves the ability of boost pressure and to effective utilization of airflow kinetic energy.
● when the technology of the present invention structure flow-guiding turbocharger and the operation of Vehicular internal combustion engine supercharging coupling, each is regulated control as the pressurized air bypass drainage modulating valve (or solenoid valve) of regulating Control Parameter and exhaust fuel gas bypass regulator valve (or bleed valve) to the drainage air air compensation of low operating mode and the exhaust fuel gas bypass discharge quantity of high operating mode with the blower outlet boost pressure by one respectively with high (rotating speed, load) operating mode in low (rotating speed, load) operating mode.Concrete control methods are as follows: set boost pressure value of placing restrictions on that they open and close valve separately respectively in advance pressurized air bypass drainage modulating valve (or solenoid valve) and exhaust fuel gas bypass regulator valve (or bleed valve).When boost pressure was lower than the value of placing restrictions on of Open valve, valve was in closed condition; And when boost pressure was higher than the value of placing restrictions on of throttle down, then valve was opening state.For modulating valve, the big or small variation that is directly proportional with the size of boost pressure value of valve opening; For bleed valve, valve opening then has only standard-sized sheet and two states of full cut-off.In the scheme of structure flow-guiding turbocharger of the present invention, modulating valve generally adopts the air film type pressure regulator valve (directly to carry out valve lift and regulate with bearing displacement of valve rod that air pressure load deformation of thin membrane produced, or with the structure of similar smoking limitator in the Vehicular internal combustion engine, utilize carrying diaphragm deformation band moving cam to rotate, thereby pass the modulating valve that valve rod changes valve lift); Bleed valve then adopt air film type bleed valve (the exhaust fuel gas bypass bleed valve that often adopt in the small-sized footpath of prior art Vehicular internal combustion engine, mixed flow turbine pressurized machine) mostly in high rotating speed operating mode venting is regulated or with Pneumatic pipe cleaner, disconnect that the pass control valve opens entirely, the simple structure solenoid valve (bleed valve) of full cut-off.In the structure of all technological scheme flow-guiding turbochargers that following the present invention adopts, pressurized air bypass drainage modulating valve (or solenoid valve) all is installed on pressurized machine, and this is external, and all adopts the bypass arm of valve and blower outlet pressurized air to connect the all-in-one-piece structure bar none.
● structure flow-guiding turbocharger of the present invention and Vehicular internal combustion engine are as follows by the situation of slow-speed of revolution operating mode when the rated speed operating mode is moved by external characteristics supercharging coupling:
When Vehicular internal combustion engine moved in the low speed operating mode scope that is not reached for pressurized air bypass drainage modulating valve (or bleed valve) predefined " the Open valve value of placing restrictions on " by idling operation to boost pressure as yet, the valve of pressurized air bypass drainage modulating valve (or bleed valve) was in closed condition all the time under the effect of self pressure spring impacting force.At this moment, the exhaust fuel gas of internal-combustion engine all flows into turbine wheel via pipe in the combustion gas of turbine volute inlet tube.Because the discharge area A of pipe in this combustion gas
1With long-pending footpath than (A/R)
1They all less than the corresponding discharge area at the turbine volute inlet tube outlet throat place of generally all press near the parameter designing configuration Maximum Torque on the external characteristics (about 50%～55% rated speed) operating mode in the automobile-used footpath of prior art (mixing) the stream turbocharger arrangement and long-pending directly than value, therefore, the boost pressure value of structure flow-guiding turbocharger of the present invention output when this operating mode scope operation is more much higher than the automobile-used footpath of normal conventional structure (mixing) stream turbosupercharger.
When Vehicular internal combustion engine continues to higher rotating speed operating mode operation, the also corresponding increase of boost pressure.When boost pressure is reached for " cracking pressure " (such as 0.13MPa absolute pressure) that pressurized air bypass drainage modulating valve sets in advance, pressurized air bypass drainage modulating valve begins to open, the tonifying Qi of drainage air begins to flow into " drainage air/bypass exhaust fuel gas common conduit " by the pressurized air bypass arm at pressurized machine self blower outlet place through pressurized air bypass drainage modulating valve (or bleed valve), and the exhaust fuel gas that flows to the booster turbine impeller is implemented " tonifying Qi ".The adding of drainage air tonifying Qi, increased the mass flow rate of the turbine wheel working medium of flowing through, thereby the gaseous-pressure of turbine inlet is improved, the enthalpy drop or the turbine power of turbine stage have been increased, drive gas compressor with higher rotating speed rotation, cause the corresponding increase of boost pressure, the also corresponding increase of valve opening, the power that consume offset when reaching balance more because of boost pressure improves for power gain that obtains because of the tonifying Qi of drainage air until the turbine stage of flow-guiding turbocharger and compressor stage, and it is stable that operating mode just is.Along with the Vehicular internal combustion engine rotating speed continues to increase, boost pressure is also corresponding to be continued to increase, be reached for " closing pressure " that pressurized air bypass drainage modulating valve (or bleed valve) sets in advance at boost pressure and (be generally near the boost pressure value the Maximum Torque operating mode, such as 0.25MPa absolute pressure) time, pressurized air bypass drainage modulating valve (or bleed valve) begins to cut out, present cutout in " drainage air/bypass exhaust fuel gas common conduit ", Vehicular internal combustion engine all flows into turbine wheel through " pipe in the combustion gas " at the exhaust fuel gas of this rotating speed operating mode of external characteristics.Because the mass flow rate of exhaust fuel gas is approximate and the proportional variation of rotating speed, so when the Vehicular internal combustion engine rotating speed increases, the also corresponding increase of boost pressure.Be increased to the value that makes boost pressure until rotating speed and be reached near exhaust fuel gas bypass regulator valve (or bleed valve) predefined " cracking pressure " (the boost pressure value of operating mode external characteristics 80% rated speed for example, such as 0.3MPa absolute pressure) time, valve begins to open, and the bypass exhaust fuel gas flows into " common conduit of drainage air/bypass combustion gas " by " pipe in the combustion gas " through valve.At this moment, exhaust fuel gas at throat's discharge area of spiral case inlet pipe by A
1Value is increased to (A suddenly
1+ A
2) value, the gas flow rate that flows into turbine wheel is descended, turbine power reduces, and the lift-rising of blower outlet boost pressure is subjected to pressing down slow, and this state will extend to declared working condition always.
In sum as can be known: by the configuration of " pipe in the combustion gas " and " drainage air/bypass combustion gas common conduit " geometrical shape, size and position in the reasonable adjustment turbine volute inlet tube, and valve size, lift and the engaging pressure gas flow of valve (or by) of suitably selecting " air conduction valve " and " combustion gas bypass valve ", can be similar to boost pressure (or pressure ratio) when satisfying Vehicular internal combustion engine and structure flow-guiding turbocharger of the present invention and moving not with the requirement of rotating speed change by external characteristics.
According to the requirement to the good degree and the installing space restriction aspect of Vehicular internal combustion engine and flow-guiding turbocharger supercharging matching performance, the basic structure of flow-guiding turbocharger of the present invention has following three kinds of technological schemes available:
1. between flow-guiding turbocharger turbine volute suction flange and internal-combustion engine vent-pipe outlet(discharge) flange, install the organization plan of " the drainage air/shared suction chamber of bypass combustion gas " additional:
◆ pressurized air bypass drainage modulating valve (or solenoid valve) and exhaust fuel gas bypass regulator valve (or bleed valve) all are arranged in " the external scheme of combustion gas bypass valve " (accompanying drawing 1) of suction chamber outside
In this organization plan, the drainage air flows into suction chamber through pressurized air bypass drainage modulating valve (or solenoid valve) at the interface tube of suction chamber lower surface by the pressurized air bypass arm at flow-guiding turbocharger self blower outlet place; The bypass combustion gas is then by the outlet that is linked in the bypass valve on the internal-combustion engine vent-pipe outlet stool, at the interface tube inflow suction chamber of suction chamber upper surface.
◆ pressurized air bypass drainage modulating valve (or solenoid valve) is arranged in the suction chamber outside, but exhaust fuel gas bypass regulator valve (or bleed valve) is arranged in " the built-in scheme of combustion gas bypass valve " (accompanying drawing 2) in the suction chamber
In this scheme, the mode that the drainage air flows into suction chamber is identical with above-mentioned " external scheme ", but the bypass combustion gas is then directly by entering the turbine volute inlet tube after the bypass valve outflow that is installed in the suction chamber.
2. technical solution of the present invention drainage air is through being arranged in the outside pressurized air bypass drainage modulating valve (or solenoid valve) that is bound up with blower outlet pressurized air bypass arm of flow-guiding turbocharger, and the interface tube in the turbine volute inlet tube on " drainage air/bypass combustion gas common conduit " position outer surface flows into common conduit; The bypass combustion gas then by " combustion gas in pipe " in the turbine volute through it with adjacent " common conduit " between separate the valve opening of the combustion gas bypass bleed valve on the wall, inflow common conduit.In technical solution of the present invention, the general typical structure of the bleed valve that small-sized footpath (mixing) the stream turbosupercharger of the structure of this combustion gas bypass bleed valve and prior art Vehicular internal combustion engine adopts when the high rotating speed operating mode of internal-combustion engine bypass is exitted is same entirely, and unique difference is that the keying parts of its venting valve are the inside (accompanying drawing 3) that is installed on " common conduit " in technical solution of the present invention.
3. the structure of the turbine volute inlet tube of technical solution of the present invention (as shown in Figure 4) and above-mentioned all schemes are different, and its difference has following 2 points:
■ is still arranging two passages in the turbine volute inlet tube---the through-flow channel (or through-flow interlayer) of an I. C. engine exhaust combustion gas through-flow channel and the tonifying Qi of a drainage air.But this drainage air passageways is no longer shared with the bypass combustion gas, also is private pipeline.
■ bypass combustion gas venting does not flow into turbine wheel, but flow bleed valve structure and the venting mode that turbosupercharger adopts when high rotating speed operating mode bypass is exitted as the small-sized footpath of normal conventional structure (mixing) of prior art Vehicular internal combustion engine, the bypass combustion gas is emitted by the valve opening of the bleed valve on the exhaust fuel gas channel side wall, walk around (without) turbine wheel, the outlet pipe that is flowed directly to turbine is discharged.
The pluses and minuses of above-mentioned three kinds of technological schemes compare: scheme is 1. when adopting the exhaust fuel gas bypass regulator valve, because of changing with boost pressure, valve lift is soft phase, 2. and 3. steady the technological scheme that combustion gas bypass bleed valve is adopted in the regulating working conditions transition also helps the tonifying Qi of drainage air simultaneously to the accumulation that improves the turbine inlet gaseous-pressure charge-air pressure of blower outlet (thereby improved) effect with keep.In addition, because have attached suction chamber, as long as therefore enough installing spaces are arranged, then the air conduction valve just can freedom connect with suction chamber by connecting pipeline with the combustion gas bypass valve, thereby obtain bigger layout degrees of freedom, and they can be combined to be attached on the suction flange of turbine volute as the patented technology assembly and connect mutually with the internal-combustion engine vent-pipe outlet(discharge) flange again, these characteristics all help popularizing the flow-guiding turbocharger work of automobile-used small-sized footpath (mixing) the stream turbosupercharger reforming cost patent of invention technical pattern of prior art ordinary construction.Scheme shortcoming 1. is that required installing space is bigger, and this is still not serious to combustion gas bypass valve " external scheme ", but just more outstanding to " built-in scheme ".Cause scheme 1. can be restricted to the application on the part car that strict demand is arranged at installing space.Scheme advantage 2. is the energy that its can make full use of the combustion gas of high operating mode bypass as scheme 1., make its work done in turbine wheel, but 1. installation dimension obviously little than scheme.In addition, 2. scheme can utilize the structure of the double flow channel turbine volute of the automobile-used footpath of prior art ordinary construction (mixing) stream turbosupercharger, redesign distributes the area ratio of two runners, make the larger area passage as " pipe in the combustion gas " respectively, and be " common-use tunnel of drainage air and bypass combustion gas " than the passage of small size, the double again combustion gas bypass bleed valve that adds this scheme also is to use very wide technology maturation structure in the stream turbosupercharger of the automobile-used footpath of prior art (mixing).Therefore, 1. 2. scheme more approach the structure of the automobile-used footpath of prior art ordinary construction (mixing) stream turbosupercharger than scheme, all obviously taking advantage aspect the low cost manufacturing of installation dimension, technology maturation degree (reliability and the durability making, use) and component and the buying, thereby becoming the most potential the technology of the present invention structure in the practicality.2. 1. 3. scheme compared with scheme with scheme, its structure is the simplest, though it with scheme 1. and 2. the same, have equally in the fundamental function of low operating mode with " flow-guiding turbocharger " of drainage air tonifying Qi improvement Vehicular internal combustion engine low-load performance, but exit because of adopting bypass in high rotating speed operating mode, make the bypass combustion gas lose the energy of this part combustion gas, so not as good as scheme 1. and 2. it join the machine performance without the turbine wheel work done.
As for the comparison between technical solution of the present invention flow-guiding turbocharger and prior art scheme flow-guiding turbocharger, clearly, of the present invention above-mentioned 1., 2., 3. technological scheme all is much better than the prior art scheme at structural complexity, high-performance, low cost and high adjustability aspects, and have to promote and be used for the advantage that the Vehicular internal combustion engine low-load performance improves.
Description of drawings
Fig. 1 shows the schematic representation of adjunction between turbine volute suction flange and internal-combustion engine vent-pipe outlet(discharge) flange in " the external scheme of combustion gas bypass valve " " the drainage air/shared suction chamber of bypass combustion gas " structure.Digital implication among the figure: 1---turbine volute inlet tube, 2---pipe in the exhaust fuel gas, 3---drainage air/bypass combustion gas common conduit, 4---the drainage air/shared suction chamber of bypass combustion gas, 5---the internal-combustion engine vent-pipe outlet(discharge) flange, 6---turbine volute.
Fig. 2 shows and add the structural representation that is connected to " the drainage air/shared suction chamber of bypass combustion gas " between turbine volute suction flange and the internal-combustion engine vent-pipe outlet(discharge) flange in " the built-in scheme of combustion gas bypass valve ".Digital implication among the figure: 1---turbine volute inlet tube, 2---pipe in the exhaust fuel gas, 3---drainage air/bypass combustion gas common conduit, 4---the drainage air/shared suction chamber of bypass combustion gas, 5---the exhaust fuel gas bypass regulator valve, 6---drainage pressurized air interface tube.
Fig. 3 shows valve opening and closing arrangements of components " drainage air tonifying Qi/bypass combustion gas venting common conduit " inner technical solution of the present invention structural representation in the turbine volute inlet tube of bypass combustion gas bleed valve.Digital implication among the figure: 1---turbine volute inlet tube, 2---pipe in the exhaust fuel gas, 3---drainage air/bypass combustion gas common conduit, 4---pressurized air bypass drainage modulating valve, 5---exhaust fuel gas bypass bleed valve, 6---drainage pressurized air interface tube.7---gas compressor, 8---turbine, 9---the blower outlet pipe, 10---the internal-combustion engine vent-pipe outlet(discharge) flange.
Shown in Fig. 4 is that I. C. engine exhaust combustion gas and drainage air all are furnished with the autonomous channel in turbine volute, and the bypass combustion gas is not flowed through turbine wheel by the venting valve opening of " combustion gas in pipe " sidewall in the turbine volute inlet tube and directly is disposed to the technical solution of the present invention organigram of turbine outlet pipe.
Shown in Fig. 5 is the once a large amount of a kind of structures that have the gas film pressure regulating type " exhaust fuel gas bypass regulator valve " of radiated rib structure producing and use of German KKK company (existing Borg-Warner company).
Embodiment
Shown in Fig. 2 is with respect to the automobile-used footpath of prior art (mixing) stream turbosupercharger normal conventional structure, must be to technical solution of the present invention flow-guiding turbocharger 2., carry out component and change and install additional the longitudinal section view (but in the figure, the air conduction valve that is installed on the blower outlet pressurized air bypass arm shows) of unit architecture.The body design and construction of technical solution of the present invention flow-guiding turbocharger, except that the relevant portion of turbine volute inlet tube 1 on design and construction different, all the other all with press the Vehicular internal combustion engine external characteristics near the Maximum Torque operating mode parameter designing or adaptive common automobile-used footpath (mixing) flow that the structure of turbosupercharger is identical, the flow passage component size is close or slightly little.In this invention scheme, turbine volute inlet tube 1 is in the area A of outlet throat
0With long-pending footpath than (A/R)
0System is by near the parameter designing Vehicular internal combustion engine declared working condition or select for use.In the passage of turbine volute inlet tube 1, arranging " pipe in the I. C. engine exhaust combustion gas special use " 2 and " drainage air tonifying Qi/bypass combustion gas venting common conduit (or through-flow interlayer) " 3 totally two air-flow paths.Wherein, " pipe in the combustion gas " 2 area A in spiral case inlet pipe outlet throat
1With long-pending footpath than (A/R)
1System is by designing than near the duty parameter of Maximum Torque (general about 50%～55% rated speed) rotating speed that operating mode is lower (for example 30% rated speed) on the Vehicular internal combustion engine external characteristics or select for use, so their value is littler.Like this, the slow-speed of revolution operating mode before the air conduction opening of valves, structure pressurized machine of the present invention just can obtain much higher boost pressure than common vehicle supercharger, and helps the improvement and the tonifying Qi of drainage air of low-load performance.In addition, between the outlet(discharge) flange of the turbine volute suction flange of this invention technological scheme and Vehicular internal combustion engine outlet pipe, installed " a shared suction chamber of drainage air tonifying Qi/exhaust fuel gas bypass venting " 4 additional, because exhaust fuel gas bypass regulator valve 5 is installed in this suction chamber 4, and is the configuration state that combustion gas bypass valve 5 is built in suction chamber 4.The built-in structure of this combustion gas bypass valve simplifies the structure because of having removed the measure that prevents gas leakage, also eliminated bypass combustion gas the leak energy loss that causes and the drawback of befouling environment.That drainage air tonifying Qi stop valve is arranged at the structure that parallel connection strikes up partnership in the intermediate (bearing support) of turbosupercharger itself is different with the prior art flow-guiding turbocharger, present embodiment is the same with whole technological schemes of the present invention all to be installed on the turbosupercharger outside with pressurized air bypass drainage modulating valve (or bleed valve), and is bound up with the pressurized air bypass arm of blower outlet.The tonifying Qi of drainage air is flowed out through the valve of pressurized air bypass drainage modulating valve (or bleed valve), interface tube (only having marked an interface tube screw 6 on the suction chamber longitudinal section) in " drainage air tonifying Qi/bypass combustion gas exit shared suction chamber " 4 two sides locates to flow into shared suction chamber, and continues to flow to interior " the drainage air/bypass combustion gas common conduit " 3 of turbine volute inlet tube that is connected with its runner fairing again.
Pressurized air bypass drainage modulating valve (or bleed valve) generally adopts the structure of common air film type pressure regulator valve or switch type pressure-releasing electromagnetic valve described in preamble summary of the invention part; The structure of the bleed valve that the structure of bypass combustion gas bleed valve also adopts with the high rotating speed operating mode venting of the automobile-used footpath of prior art (mixing) stream turbosupercharger entirely with; But combustion gas bypass regulator valve 5 is because of in the environment that is in gas high-temperature, so must be furnished with radiated rib on the valve body, causes its structure special and the occupy-place volume is bigger.Accompanying drawing 5 shows German KKK company (the existing Borg-Warner company) schematic representation of long-term production, the combustion gas bypass regulator valve typical construction used once.
" pipe in the combustion gas " 2 and " drainage air/bypass combustion gas common conduit " 3 in the turbine volute inlet tube 1 of flow-guiding turbocharger, can continue to use the conventional cast technology of making turbine volute, three's inside and outside die combination is integral and with the mould matched moulds of spiral case other parts (the circumferential runner of inlet/outlet flange and spiral case inside) after, integral cast becomes the turbine volute blank, and then adopts machining to make the turbine volute fabricated part.
Suction chamber 4 should adopt precision casting mode preparing blank because of the shape more complicated, only its mating face (as flange mating face, valve base etc.) is implemented machining then, reaches required dimensional accuracy and surface finishment requirement to guarantee it.The part of valve body radiated rib part can adopt the precision casting mode to make too.The valve of bypass gas control valve 5 (containing valve rod) then can be selected for use in the accessory by the engine valve part, needn't make specially, therefore easily.
Claims (3)
1, a kind of flow-guiding turbocharger, it is by a common regular-structured vehicle small streamflow (mixing) stream turbosupercharger and two valves---a pressurized air bypass drainage modulating valve (or bleed valve) and an exhaust fuel gas bypass regulator valve (or bleed valve), and the pipeline that connects them combines.It is characterized in that: the passage in the turbine volute inlet tube of turbosupercharger is made up of following two-part: a part is the passage of specially logical I. C. engine exhaust combustion gas, and remaining another part then is drainage pressurized air private or drainage pressurized air and the shared passage of bypass exhaust fuel gas.
2, by the described flow-guiding turbocharger of claim 1, it is characterized in that: connect all-in-one-piece pressurized air bypass drainage modulating valve (or bleed valve) with blower outlet pressurized air bypass arm, the pipeline of its valve inlet end is communicated with pressurized air bypass arm; The pipeline of valve outlet side then both can dock with the corresponding suction port of " the drainage air/shared suction chamber of bypass combustion gas ", also can be directly and the turbine volute inlet tube in the private passage or the passage connection shared of drainage pressurized air of logical drainage pressurized air with the bypass exhaust fuel gas.
3, by the described flow-guiding turbocharger of claim 1, it is characterized in that: be installed on before the turbine volute suction flange or the exhaust fuel gas bypass regulator valve (or bleed valve) at turbine volute inlet tube position, its valve inlet end must be communicated with the designated lane of exhaust fuel gas; Then both can dock with the corresponding suction port of " the drainage air/shared suction chamber of bypass combustion gas " valve outlet side (being the end that valve opens and closes position, parts place), also can be directly and the turbine volute inlet tube in drainage pressurized air and the common-use tunnel of bypass exhaust fuel gas or the outlet gas pipeline connection of turbine volute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100496576A CN101560909A (en) | 2009-04-21 | 2009-04-21 | Flow-guiding turbocharger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100496576A CN101560909A (en) | 2009-04-21 | 2009-04-21 | Flow-guiding turbocharger |
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| CN101560909A true CN101560909A (en) | 2009-10-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128079A (en) * | 2011-02-22 | 2011-07-20 | 孙敏超 | Injection/drainage air-supply turbocharging system |
| CN103266948B (en) * | 2013-05-10 | 2016-06-29 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of exhaust-driven turbo-charger exhaust-gas turbo charger and method |
| CN107013256A (en) * | 2017-04-27 | 2017-08-04 | 上海泛智能源装备有限公司 | A kind of gas turbine |
| CN107120192A (en) * | 2017-04-27 | 2017-09-01 | 上海泛智能源装备有限公司 | A kind of scroll casing type collection chamber and gas turbine |
| CN108757584A (en) * | 2018-07-09 | 2018-11-06 | 大同北方天力增压技术有限公司 | A kind of turbocharger muffler and its supplementing method for air |
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2009
- 2009-04-21 CN CNA2009100496576A patent/CN101560909A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128079A (en) * | 2011-02-22 | 2011-07-20 | 孙敏超 | Injection/drainage air-supply turbocharging system |
| CN103266948B (en) * | 2013-05-10 | 2016-06-29 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of exhaust-driven turbo-charger exhaust-gas turbo charger and method |
| CN107013256A (en) * | 2017-04-27 | 2017-08-04 | 上海泛智能源装备有限公司 | A kind of gas turbine |
| CN107120192A (en) * | 2017-04-27 | 2017-09-01 | 上海泛智能源装备有限公司 | A kind of scroll casing type collection chamber and gas turbine |
| CN108757584A (en) * | 2018-07-09 | 2018-11-06 | 大同北方天力增压技术有限公司 | A kind of turbocharger muffler and its supplementing method for air |
| CN108757584B (en) * | 2018-07-09 | 2024-03-12 | 大同北方天力增压技术有限公司 | Silencer for turbocharger and air supplementing method thereof |
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Application publication date: 20091021 |