CN102852572B - Variable-geometry volute casing device - Google Patents

Variable-geometry volute casing device Download PDF

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Publication number
CN102852572B
CN102852572B CN201210087157.3A CN201210087157A CN102852572B CN 102852572 B CN102852572 B CN 102852572B CN 201210087157 A CN201210087157 A CN 201210087157A CN 102852572 B CN102852572 B CN 102852572B
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volute
air
inlet
flow passage
adjustment valve
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CN102852572A (en
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王航
王艳霞
范厚传
袁道军
宋丽华
曹怀瑞
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Kangyue Technology (Shandong) Co.,Ltd.
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Kangyue Technology Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The invention discloses a kind of variable-geometry volute casing device, comprise turbine volute, be provided with volute air inlet flow channel in turbine volute, turbine volute is provided with the volute air-inlet mouth be connected with volute air inlet flow channel; Be provided with the first pneumatic barrier in volute air inlet flow channel, volute air inlet flow channel is spaced apart volute air-inlet inner flow passage and volute air-inlet outer flow passage by the first pneumatic barrier; In volute air-inlet outer flow passage, be provided with the second pneumatic barrier, volute air-inlet outer flow passage is spaced apart the first branch flow passage and the second branch flow passage by the second pneumatic barrier, and the second branch flow passage is positioned at the outer circumferential of the first branch flow passage; Volute air-inlet inner flow passage is for often to drive flow channel into; The air inlet adjustment valve that control first branch flow passage and the second branch flow passage open or close is provided with in volute air inlet flow channel near volute air-inlet mouth place; The present invention achieves the variable of the critical surface product value at turbine volute aditus laryngis place by air inlet adjustment valving, thus effectively meets the performance requirement under each operating mode of motor.

Description

Variable-geometry volute casing device
Technical field
The present invention relates to a kind of volute casing device, specifically relate to one and regulate spiral case critical area according to Under Different Work Condition of Engine, to meet each performance of operating condition requirement of motor, be mainly used in improving the variable-geometry volute casing device of the performance requirement under motor moderate rotation, belong to supercharging of internal combustion engine field.
Background technique
In recent years, along with the increasingly stringent of Abgasgesetz, turbocharging technology is subject to increasing attention.Turbocharging technology is under the prerequisite of not consumption of engine Effective power substantially, and the exhaust energy utilizing motor to discharge promotes turbine acting, and carries out supercharging by gas compressor to engine charge; In addition, turbo machine has the effect reducing motor discharge noise.Therefore, turbocharging technology has become one of reply energy crisis and the technological means meeting emission standard.
The turbosupercharger (WGT) of traditional band exhaust gas by-pass valve, makes high-temp waste gas discharge when motor is in high operating mode by opening exhaust gas by-pass valve, i.e. a kind of outside venting measure, and the rotating speed realizing pressurized machine reduces, and avoids supercharging excessive.But under most of operating mode, exhaust gas bypass valve type spiral case does not realize mating with the effective of motor.
At present, Double flow path turbo-charger (DLP) structure obtains and develops on a large scale very much, patent CN101949326A discloses a kind of variable-section double-channel air inlet turbine structure, as shown in Figure 1, this structure comprises turbine volute 1, volute air inlet flow channel 2 is provided with in turbine volute 1, midfeather 3 is provided with in volute air inlet flow channel 2, volute air inlet flow channel 2 is separated into volute air-inlet small flow channels 4 and the large runner 5 of volute air-inlet by described midfeather 3, the position of the import near volute air inlet flow channel 2 on described midfeather 3 is provided with by-pass port 6, by-pass port 6 is provided with air inlet adjustment valve 7, described air inlet adjustment valve 7 is in transmission connection with air inlet adjustment control mechanism 8.Under the middle and high fast operating mode of motor, air inlet adjustment valve 7 is in opening state (air inlet adjustment valve location as indicated by a broken line in fig. 1), and now volute air-inlet small flow channels 4 works together with the large runner 5 of volute air-inlet; Under low engine speed operating mode, air inlet adjustment valve 7 is in closed condition (air inlet adjustment valve location is as shown in Fig. 1 solid line), and now only volute air-inlet small flow channels 4 is in running order.This structural feature is under any operating mode of motor, and the critical surface I at turbine volute aditus laryngis place is changeless, is namely the function being realized variable cross section by a kind of inner venting mode.
Therefore, wish that a kind of critical surface at turbine volute aditus laryngis place of design is variable, thus the variable-geometry volute casing device of realization character section-variable function, be mainly used in improving the performance requirement under motor moderate rotation, improve air inflow and the efficiency of low engine speed operating mode, promote the pressure ratio under motor high operating mode, meet the performance requirement under each operating mode of motor.
Summary of the invention
The problem to be solved in the present invention is for the turbosupercharger (WGT) of traditional band exhaust gas by-pass valve and the constant feature of the turbine volute aditus laryngis place critical surface at present designed by Double flow path turbo-charger (DLP), provides the variable-geometry volute casing device that a kind of turbine volute aditus laryngis place critical surface is variable.
In order to solve the problem, the present invention by the following technical solutions:
A kind of variable-geometry volute casing device, comprise turbine volute, be provided with volute air inlet flow channel in described turbine volute, described turbine volute is provided with the volute air-inlet mouth be connected with volute air inlet flow channel;
Be provided with the first pneumatic barrier in described volute air inlet flow channel, volute air inlet flow channel is spaced apart volute air-inlet inner flow passage and volute air-inlet outer flow passage by described first pneumatic barrier;
In described volute air-inlet outer flow passage, be provided with the second pneumatic barrier, volute air-inlet outer flow passage is spaced apart the first branch flow passage and the second branch flow passage by described second pneumatic barrier, and described second branch flow passage is positioned at the outer circumferential of described first branch flow passage;
Described volute air-inlet inner flow passage is for often to drive flow channel into;
The air inlet adjustment valve that control first branch flow passage and the second branch flow passage open or close is provided with in volute air inlet flow channel near volute air-inlet mouth place;
When motor is in speed operation scope, air inlet adjustment valve closing, closed by volute air-inlet outer flow passage, volute air-inlet inner flow passage is in the state of working independently, and now the critical area at turbine volute aditus laryngis place is the first critical area;
When motor is in middling speed condition range, air inlet adjustment valve open, the value range of the open angle of described air inlet adjustment valve is 3 ~ 45 degree, now the first branch flow passage is opened completely, volute air-inlet inner flow passage and the first branch flow passage in running order, now the critical area at turbine volute aditus laryngis place is the second critical area;
When motor is in high-speed working condition scope, air inlet adjustment valve is opened completely, opened completely by volute air-inlet outer flow passage, in running order the while of volute air-inlet inner flow passage and volute air-inlet outer flow passage, now the critical area at turbine volute aditus laryngis place is the 3rd critical area;
First critical area, the second critical area and the 3rd critical area are unequal mutually.
Below further improvement of these options of the present invention:
Described volute air-inlet outer flow passage is positioned at the outer circumferential of described volute air-inlet inner flow passage, and the sectional area of described volute air-inlet outer flow passage is greater than the sectional area of described volute air-inlet inner flow passage.
Further improvement: the ratio range of the Elongation of described first branch flow passage is 0.5 ~ 10; The ratio range of the Elongation of described second branch flow passage is 0.5 ~ 10.
Further improvement: the center parallel crossing turbine volute is 0 degree of cross section in volute air-inlet mouth plane and near the cross section of volute air-inlet mouth;
The central vertical crossing turbine volute is in 0 degree of cross section and the cross section being positioned at 0 degree of cross-sectional left is 90 degree of cross sections;
The center parallel crossing turbine volute is 180 degree of cross sections in volute air-inlet mouth plane and away from the cross section of volute air-inlet mouth;
The central vertical crossing turbine volute is in 180 degree of cross sections and the cross section being positioned at 180 degree of cross-sectional right side is 270 degree of cross sections;
Described first pneumatic barrier and described second pneumatic barrier are all positioned at 0 degree of cross section of turbine volute away from volute air-inlet mouth end side near the end of volute air-inlet mouth;
Described first pneumatic barrier is the first pneumatic barrier entrance point angle near volute air-inlet mouth end to the angle in 0 degree of cross section of the line of central point and turbine volute, and the first pneumatic barrier entrance point angle is 0 ~ 90 degree;
Described first pneumatic barrier is the first pneumatic barrier outlet end angle away from the end of volute air-inlet mouth to the angle between the line and 0 degree of cross section of turbine volute of spiral case central point, and the first pneumatic barrier outlet end angle is 120 ~ 210 degree;
The angle of described second pneumatic barrier between the end of volute air-inlet mouth to the line and 0 degree of cross section of turbine volute of spiral case central point is the second pneumatic barrier entrance point angle, and the second pneumatic barrier entrance point angle is 0 ~ 210 degree;
Described second pneumatic barrier is the second pneumatic barrier outlet end angle away from the end of volute air-inlet mouth to the angle between the line and 0 degree of cross section of turbine volute of spiral case central point, and the second pneumatic barrier outlet end angle is 60 ~ 300 degree.
Further improvement: described air inlet adjustment valve is connected with air inlet adjustment valve shaft, and air inlet adjustment valve shaft and turbine volute are rotationally connected;
Further improvement: the sectional shape of described air inlet adjustment valve is sector structure, described air inlet adjustment valve shaft is arranged on air inlet adjustment valve near end, volute air-inlet mouth one end, and described turbine volute is provided with spiral case and installs cover plate.
Further improvement: have spiral case inwall in volute air inlet flow channel, position corresponding with air inlet adjustment valve on spiral case inwall is provided with the deep gouge that can hold air inlet adjustment valve, and described air inlet adjustment valve is provided with the fitting surface matched with the first pneumatic barrier.
When motor is in middling speed condition range, air inlet adjustment valve shaft is under the drive of air inlet adjustment control mechanism, the air inlet adjustment valve driving one with it to connect rotates, thus the first branch flow passage is opened completely, now volute air-inlet inner flow passage and the first branch flow passage are all in air-suction state, thus drive turbine acting, now because volute air inlet flow channel sectional area becomes large, thus improve medium engine speed performance of operating condition.
Another kind of improvement: the sectional shape of described air inlet adjustment valve is rectangular configuration.
Further improvement: the center of described air inlet adjustment valve shaft is 1/4 ~ 1/2 to the ratio range of the distance of air inlet adjustment valve near volute air-inlet mouth one end and air inlet adjustment valve overall length.
Further improvement: the two ends of described air inlet adjustment valve are respectively ramp structure, is respectively equipped with the fitting surface matched with the two ends of air inlet adjustment valve on described spiral case inwall He on the first pneumatic barrier.
When motor is in middling speed condition range, air inlet adjustment valve shaft is under the drive of air inlet adjustment control mechanism, the air inlet adjustment valve driving one with it to connect rotates, thus the first branch flow passage and the second branch flow passage is all opened and be in a smaller aperture.Now the first branch flow passage and the second branch flow passage are all in air-suction state, thus drive turbine acting.
Another kind of improvement: described air inlet adjustment valve shaft is arranged on one end end of air inlet adjustment valve near the first pneumatic barrier.
Further improvement: described air inlet adjustment valve is ramp structure away from one end of air inlet adjustment valve shaft, and described spiral case inwall is provided with the fitting surface matched with air inlet adjustment valve.
When motor is in middling speed condition range, air inlet adjustment valve shaft, under the drive of air inlet adjustment control mechanism, drives the air inlet adjustment valve that one connects with it to turn an angle, thus is opened completely by the second branch flow passage.Now volute air-inlet inner flow passage and the second branch flow passage are all in air-suction state, thus drive turbine acting.
The present invention adopts such scheme, and when motor is in speed operation scope and high-speed working condition scope, the working procedure of three kinds of design proposals is identical.When motor is in speed operation scope, air inlet adjustment valve shaft is under the drive of air inlet adjustment control mechanism, the air inlet adjustment valve driving one with it to connect rotates, thus volute air-inlet outer flow passage is closed, the waste gas of being discharged by motor only flows through volute air-inlet inner flow passage thus drives turbine acting, because volute air-inlet inner runner section amasss smaller, effectively can improve the induction air flow ratio of turbine, promote the boost pressure of speed operation, reduce the impact of supercharging sluggishness.
When motor is in high-speed working condition scope, air inlet adjustment valve shaft is under the drive of air inlet adjustment control mechanism, and the air inlet adjustment valve driving one with it to connect rotates, thus is opened completely by volute air-inlet outer flow passage.Now in running order while of volute air-inlet outer flow passage and volute air-inlet inner flow passage, because volute air inlet flow channel sectional area becomes large, inlet stream effectively can be guided to enter turbine wheel with suitable flow angle, improve turbine inflow efficiency, thus improve the pressure ratio of high-speed working condition.
In sum, the present invention by the air inlet adjustment valve device structure of turbine volute reasonable in design and design joined together, thus achieves the variable of the critical surface product value at turbine volute aditus laryngis place, thus effectively meets the performance requirement under each operating mode of motor.Worm frame inheritance in the present invention is good, easily realizes through engineering approaches fast.The air inlet regulating device structure of design is simple, and control mode easily realizes, and reliability is high.
Below in conjunction with drawings and Examples, the present invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is variable-section double-channel air inlet turbine structural representation in background technique;
Accompanying drawing 2 is variable-geometry volute casing device structural representations under low engine speed, middling speed operating mode in the embodiment of the present invention 1;
Accompanying drawing 3 is the structural representations in the 90-270 degree cross section of variable-geometry volute casing device in the embodiment of the present invention 1;
Accompanying drawing 4 is variable-geometry volute casing device structural representations under high engine speeds operating mode in the embodiment of the present invention 1;
Accompanying drawing 5 is variable-geometry volute casing device structural representations under low engine speed, middling speed operating mode in the embodiment of the present invention 2;
Accompanying drawing 6 is air inlet adjustment valve mechanism schematic diagram of variable-geometry volute casing device in the embodiment of the present invention 2;
Accompanying drawing 7 is variable-geometry volute casing device structural representations under high engine speeds operating mode in the embodiment of the present invention 2;
Accompanying drawing 8 is variable-geometry volute casing device structural representations under low engine speed, middling speed operating mode in the embodiment of the present invention 3;
Accompanying drawing 9 is variable-geometry volute casing device structural representations under high engine speeds operating mode in the embodiment of the present invention 3;
Accompanying drawing 10 is structural representations that in the embodiment of the present invention 1, variable-geometry volute casing device changes at the second pneumatic barrier entrance point angle γ and the second pneumatic barrier outlet end angle theta.
In figure: 1-turbine volute; 2-volute air inlet flow channel; 3-midfeather; 4-volute air-inlet small flow channels; The large runner of 5-volute air-inlet; 6-by-pass port; 7-air inlet adjustment valve; 8-air inlet adjustment control mechanism; 9-volute air-inlet mouth; 10-first pneumatic barrier; 11-volute air-inlet inner flow passage; 12-second pneumatic barrier; 13-first branch flow passage; 14-second branch flow passage; α-the first pneumatic barrier entrance point angle; β-the first pneumatic barrier outlet end angle; γ-the second pneumatic barrier entrance point angle; θ-the second pneumatic barrier outlet end angle; A1-first critical area; A2-second critical area; A3-the 3rd critical area; 15-air inlet adjustment valve shaft; 16-spiral case inwall; 17-deep gouge; 18-spiral case installs cover plate; 19-volute air-inlet mouth plane; I-critical surface; A-0 degree cross section; B-90 degree cross section; C-180 degree cross section; D-270 degree cross section; The open angle of Φ-air inlet adjustment valve.
Embodiment
Embodiment 1, and as shown in Figure 2, a kind of variable-geometry volute casing device, comprises turbine volute 1, is provided with volute air inlet flow channel 2 in described turbine volute 1, and described turbine volute 1 is provided with the volute air-inlet mouth 9 be connected with volute air inlet flow channel 2;
The first pneumatic barrier 10 is provided with in described volute air inlet flow channel 2, volute air inlet flow channel 2 is spaced apart volute air-inlet inner flow passage 11 and volute air-inlet outer flow passage by described first pneumatic barrier 10, described volute air-inlet outer flow passage is positioned at the outer circumferential of described volute air-inlet inner flow passage 11, and the sectional area of described volute air-inlet outer flow passage is greater than the sectional area of described volute air-inlet inner flow passage 11;
The second pneumatic barrier 12 is provided with in described volute air-inlet outer flow passage, volute air-inlet outer flow passage is spaced apart the first branch flow passage 13 and the second branch flow passage 14 by described second pneumatic barrier 12, and described second branch flow passage 14 is positioned at the outer circumferential of described first branch flow passage 13;
As shown in Figure 3, the ratio range of the Elongation W/H of described first branch flow passage 13 is 0.5 ~ 10; The ratio range of the Elongation W/H of described second branch flow passage 14 is 0.5 ~ 10;
Described first pneumatic barrier 10 and the second pneumatic barrier 12 are all connected with turbine volute 1 one;
Described volute air-inlet inner flow passage 11 is for often to drive flow channel into;
Be provided with the air inlet adjustment valve 7 that control first branch flow passage 13 and the second branch flow passage 14 open or close near volute air-inlet mouth 9 place in described volute air inlet flow channel 2;
Described air inlet adjustment valve 7 carries out water conservancy diversion can to while opening or closing inflow volute air-inlet inner flow passage 11 air-flow;
The center parallel crossing turbine volute 1 is 0 degree of section A in volute air-inlet mouth plane 19 and near the cross section of volute air-inlet mouth 9;
The central vertical crossing turbine volute 1 is in 0 degree of section A and the cross section be positioned on the left of 0 degree of section A is 90 degree of cross section B;
The center parallel crossing turbine volute 1 is 180 degree of cross section C in volute air-inlet mouth plane 19 and away from the cross section of volute air-inlet mouth 9;
The central vertical crossing turbine volute 1 is in 180 degree of cross section C and the cross section be positioned on the right side of 180 degree of cross section C is 270 degree of cross section D;
Described first pneumatic barrier 10 and described second pneumatic barrier 12 are all positioned at 0 degree of section A of turbine volute 1 away from volute air-inlet mouth 9 end side near the end of volute air-inlet mouth 9;
Described first pneumatic barrier 10 is the first pneumatic barrier entrance point angle α near volute air-inlet mouth 9 end to the angle in 0 degree of cross section of the line of central point and turbine volute 1, different according to mated motor, setting the first pneumatic barrier entrance point angle α is any angle between 0 ~ 90 degree;
Described first pneumatic barrier 10 is the first pneumatic barrier outlet end angle β away from end to the angle between the line and 0 degree of section A of turbine volute 1 of spiral case central point of volute air-inlet mouth 9, different according to mated motor, setting the first pneumatic barrier outlet end angle β is any angle between 120 ~ 210 degree;
The angle of described second pneumatic barrier 12 between the end of volute air-inlet mouth 9 to the line and 0 degree of section A of turbine volute 1 of spiral case central point is the second pneumatic barrier entrance point angle γ, different according to mated motor, setting the second pneumatic barrier entrance point angle γ is any angle between 0 ~ 210 degree;
Described second pneumatic barrier 12 is the second pneumatic barrier outlet end angle theta away from the end of volute air-inlet mouth 9 to the angle between the line and 0 degree of section A of turbine volute 1 of spiral case central point, different according to mated motor, setting the second pneumatic barrier outlet end angle theta is any angle between 60 ~ 300 degree;
When motor is in speed operation scope, air inlet adjustment valve 7 is closed, and closed by volute air-inlet outer flow passage, volute air-inlet inner flow passage 11 is in the state of working independently, and now the critical area at the turbine volute aditus laryngis place of speed operation is the first critical area A1;
When motor is in middling speed condition range, air inlet adjustment valve 7 is opened, and the span of the open angle Φ of described air inlet adjustment valve is 3 ~ 45 degree.Now the first branch flow passage 13 is opened completely, volute air-inlet inner flow passage 11 and the first branch flow passage 13 in running order, the critical area at the turbine volute aditus laryngis place of middling speed operating mode is the second critical area A2;
When motor is in high-speed working condition scope, air inlet adjustment valve 7 is opened completely, opened completely by volute air-inlet outer flow passage, in running order the while of volute air-inlet inner flow passage 11 and volute air-inlet outer flow passage, now the critical area at the turbine volute aditus laryngis place of high-speed working condition is the 3rd critical area A3.
First critical area A1, the second critical area A2 and the 3rd critical area A3 unequal mutually.
Described air inlet adjustment valve 7 is connected with air inlet adjustment valve shaft 15, and air inlet adjustment valve shaft 15 and turbine volute 1 are rotationally connected;
The sectional shape of described air inlet adjustment valve 7 is sector structure, and described air inlet adjustment valve shaft 15 is arranged on air inlet adjustment valve 7 near end, volute air-inlet mouth 9 one end;
Described turbine volute is provided with spiral case and installs cover plate 18, so that the installation of air inlet adjustment valve 7;
Have spiral case inwall 16 in volute air inlet flow channel, position corresponding with air inlet adjustment valve 7 on spiral case inwall 16 is provided with the deep gouge 17 that can hold air inlet adjustment valve 7, and described air inlet adjustment valve 7 is provided with the fitting surface matched with the first pneumatic barrier 10.
As shown in Figure 2, when motor is in speed operation scope, air inlet adjustment valve 7 is closed (air inlet adjustment valve location is as shown in figure solid line), volute air-inlet outer flow passage is closed, volute air-inlet inner flow passage 11 is in the state of working independently, and now the first critical area A1(at the turbine volute aditus laryngis place of speed operation is as shown in figure solid line) value minimum.The waste gas of being discharged by motor only flows through volute air-inlet inner flow passage 11 thus drives turbine acting, because volute air-inlet inner flow passage 11 sectional area is smaller, effectively can improve the induction air flow ratio of turbine, promote the boost pressure of speed operation, reduce the impact of supercharging sluggishness.
As shown in Figure 4, when motor is in high-speed working condition scope, air inlet adjustment valve 7 is opened completely (air inlet adjustment valve location is as shown in figure double dot dash line), volute air-inlet outer flow passage is opened completely, volute air-inlet inner flow passage 11 and the first branch flow passage 13 and the second branch flow passage 14 simultaneously in running order, the 3rd critical area A3(at the turbine volute aditus laryngis place of high-speed working condition is as shown in figure double dot dash line) value maximum.Due in running order while of volute air-inlet outer flow passage and volute air-inlet inner flow passage 11, volute air inlet flow channel sectional area becomes large, inlet stream effectively can be guided to enter turbine wheel with suitable flow angle, improve turbine inflow efficiency, thus improve the pressure ratio of high-speed working condition.
As shown in Figure 2, when motor is in middling speed condition range, air inlet adjustment valve 7 opens several angle (air inlet adjustment valve location as indicated by the dashed lines), the value range of the open angle Φ of described air inlet adjustment valve is 3 ~ 45 degree, thus the first branch flow passage 13 is opened completely, volute air-inlet inner flow passage and the first branch flow passage 13 in running order, thus drive turbine acting.Now the second critical area A2(at the turbine volute aditus laryngis place of middling speed operating mode is as indicated by the dashed lines) value between the first critical area A1 and the value of the 3rd critical area A3.Now because volute air inlet flow channel sectional area becomes large, thus improve medium engine speed performance of operating condition.
Embodiment 2, as Fig. 5, as shown in Figure 6, on the basis of embodiment 1, the sectional shape that can also design air inlet adjustment valve 7 is rectangular configuration, and the center of described air inlet adjustment valve shaft 15 is 1/4 ~ 1/2 to the ratio range of the distance L1 of air inlet adjustment valve 7 near volute air-inlet mouth 9 one end and air inlet adjustment valve 7 overall length L0.
The two ends of described air inlet adjustment valve 7 are respectively ramp structure, are respectively equipped with the fitting surface matched with the two ends of air inlet adjustment valve 7 on described spiral case inwall 16 He on the first pneumatic barrier 10.
When being rectangular configuration according to the sectional shape of described air inlet adjustment valve, now the value of the first critical area A1 at the turbine volute aditus laryngis place of speed operation is maximum, the value of the 3rd critical area A3 at the turbine volute aditus laryngis place of high-speed working condition is minimum, and the scope of the value of the second critical area A2 at the turbine volute aditus laryngis place of middling speed operating mode is between the first critical area A1 and the 3rd critical area A3.
As shown in Figure 5, Figure 7, the working principle of this embodiment 2 is identical with the working principle of embodiment 1, it is identical with the working procedure of embodiment 1 with the working procedure of high-speed working condition that motor is in speed operation, difference is that motor is when being in middling speed condition range, air inlet adjustment valve shaft 15 is under the drive of air inlet adjustment control mechanism, drive the air inlet adjustment valve 7 that one connects with it to turn an angle (position of air inlet adjustment valve as indicated by the dashed lines), thus the first branch flow passage 13 and the second branch flow passage 14 are all opened be in a smaller aperture.Now volute air-inlet inner flow passage, the first branch flow passage 13 and the second branch flow passage 14 are all in air-suction state, thus drive turbine acting.
Embodiment 3, and as shown in Figure 8, on the basis of embodiment 2, the sectional shape of design air inlet adjustment valve 7 is rectangular configuration, and described air inlet adjustment valve shaft 15 is arranged on one end end of air inlet adjustment valve 7 near the first pneumatic barrier 10.
Described air inlet adjustment valve 7 is ramp structure away from one end of air inlet adjustment valve shaft 15, and described spiral case inwall 16 is provided with the fitting surface matched with air inlet adjustment valve 7.
As shown in Figure 8, Figure 9, the working principle of this embodiment 3 is identical with the working principle of embodiment 1, motor is in speed operation and the working procedure of high-speed working condition and the identical of embodiment 1, difference is that motor is when being in middling speed condition range, air inlet adjustment valve shaft 15 is under the drive of air inlet adjustment control mechanism, drive the air inlet adjustment valve 7 that one connects with it to turn an angle (position of air inlet adjustment valve as indicated by the dashed lines), thus the second branch flow passage 14 is opened completely.Now volute air-inlet inner flow passage 11 and the second branch flow passage 14 are all in air-suction state, thus drive turbine acting.
As shown in Figure 10, according to mated engine type, the structure of variable-geometry volute casing device when angle is less between the entrance point angle γ of described second pneumatic barrier and the second pneumatic barrier outlet end angle theta can be designed, the working principle of this structure is identical with the working principle of embodiment 1, difference is under medium engine speed operating mode or under high engine speeds operating mode, and the waste gas streams entered from the first pneumatic barrier or the second pneumatic barrier all accumulates an air inlet runner thus drives turbine rotation.The foundation of this structural design there is air-flow mixed flow at the suction port place of volute air-inlet outer flow passage, designs the second shorter pneumatic barrier and can effectively avoid air-flow mixed flow, promotes the performance under motor high speed.

Claims (5)

1. a variable-geometry volute casing device, comprises turbine volute (1), is provided with volute air inlet flow channel (2) in described turbine volute (1), and described turbine volute (1) is provided with the volute air-inlet mouth (9) be connected with volute air inlet flow channel (2);
Be provided with the first pneumatic barrier (10) in described volute air inlet flow channel (2), volute air inlet flow channel (2) is spaced apart volute air-inlet inner flow passage (11) and volute air-inlet outer flow passage by described first pneumatic barrier (10);
The second pneumatic barrier (12) is provided with in described volute air-inlet outer flow passage, volute air-inlet outer flow passage is spaced apart the first branch flow passage (13) and the second branch flow passage (14) by described second pneumatic barrier (12), and described second branch flow passage (14) is positioned at the outer circumferential of described first branch flow passage (13);
Described volute air-inlet inner flow passage (11) is for often to drive flow channel into;
The air inlet adjustment valve (7) that control first branch flow passage (13) and the second branch flow passage (14) open or close is provided with in volute air inlet flow channel (2) near volute air-inlet mouth (9) place;
It is characterized in that: when motor is in speed operation scope, air inlet adjustment valve (7) is closed, closed by volute air-inlet outer flow passage, volute air-inlet inner flow passage (11) is in the state of working independently, and now the critical area at turbine volute aditus laryngis place is the first critical area (A1);
When motor is in middling speed condition range, air inlet adjustment valve (7) is opened, open angle (Φ) value range of described air inlet adjustment valve is 3 ~ 45 degree, now the first branch flow passage (13) is opened completely, volute air-inlet inner flow passage (11) and the first branch flow passage (13) in running order, now the critical area at turbine volute aditus laryngis place is the second critical area (A2);
When motor is in high-speed working condition scope, air inlet adjustment valve (7) is opened completely, volute air-inlet outer flow passage is opened completely, in running order the while of volute air-inlet inner flow passage (11) and volute air-inlet outer flow passage, now the critical area at turbine volute aditus laryngis place is the 3rd critical area (A3);
First critical area (A1), the second critical area (A2) and the 3rd critical area (A3) are unequal mutually; The ratio range of the Elongation (W/H) of described first branch flow passage (13) is 0.5 ~ 10; The ratio range of the Elongation (W/H) of described second branch flow passage 14 is 0.5 ~ 10;
Described volute air-inlet outer flow passage is positioned at the outer circumferential of described volute air-inlet inner flow passage (11), and the sectional area of described volute air-inlet outer flow passage is greater than the sectional area of described volute air-inlet inner flow passage (11);
The center parallel crossing turbine volute (1) is 0 degree of cross section (A) in volute air-inlet mouth plane (19) and near the cross section of volute air-inlet mouth (9);
The central vertical crossing turbine volute (1) is in 0 degree of cross section (A) and the cross section being positioned at 0 degree of cross section (A) left side is 90 degree of cross sections (B);
The center parallel crossing turbine volute (1) is 180 degree of cross section C in volute air-inlet mouth plane (19) and away from the cross section of volute air-inlet mouth (9);
The central vertical crossing turbine volute (1) is in 180 degree of cross sections (C) and the cross section being positioned at 180 degree of cross sections (C) right sides is 270 degree of cross sections (D);
Described first pneumatic barrier (10) and described second pneumatic barrier (12) are all positioned at 0 degree of cross section (A) of turbine volute (1) away from volute air-inlet mouth (9) end side near the end of volute air-inlet mouth (9);
Described first pneumatic barrier (10) is the first pneumatic barrier entrance point angle (α) near volute air-inlet mouth (9) end to the angle of 0 degree of cross section (A) of the line of central point and turbine volute (1), and the first pneumatic barrier entrance point angle (α) is 0 ~ 90 degree;
Described first pneumatic barrier (10) is the first pneumatic barrier outlet end angle (β) away from the end of volute air-inlet mouth (9) to the angle between the line and 0 degree of cross section (A) of turbine volute (1) of spiral case central point, and the first pneumatic barrier outlet end angle (β) is 120 ~ 210 degree;
Described second pneumatic barrier (12) is the second pneumatic barrier entrance point angle (γ) near the end of volute air-inlet mouth (9) to the angle between the line and 0 degree of cross section (A) of turbine volute (1) of spiral case central point, and the second pneumatic barrier entrance point angle (γ) is 0 ~ 210 degree;
Described second pneumatic barrier (12) is the second pneumatic barrier outlet end angle (θ) away from the end of volute air-inlet mouth (9) to the angle between the line and 0 degree of cross section (A) of turbine volute (1) of spiral case central point, and the second pneumatic barrier outlet end angle (θ) is 60 ~ 300 degree;
Described air inlet adjustment valve (7) is connected with air inlet adjustment valve shaft (15), and air inlet adjustment valve shaft (15) and turbine volute (1) are rotationally connected;
The sectional shape of described air inlet adjustment valve (7) is sector structure, and described air inlet adjustment valve shaft (15) is arranged on air inlet adjustment valve (7) near volute air-inlet mouth (9) end, one end, and described turbine volute is provided with spiral case and installs cover plate (18);
There is in volute air inlet flow channel spiral case inwall (16), the upper position corresponding with air inlet adjustment valve (7) of spiral case inwall (16) is provided with the deep gouge (17) that can hold air inlet adjustment valve (7), and described air inlet adjustment valve (7) is provided with the fitting surface matched with the first pneumatic barrier (10);
Described first pneumatic barrier (10) and the second pneumatic barrier (12) are all connected with turbine volute (1) one.
2. a kind of variable-geometry volute casing device according to claim 1, is characterized in that: the center of described air inlet adjustment valve shaft (15) is 1/4 ~ 1/2 to the close distance (L1) of volute air-inlet mouth (9) one end of air inlet adjustment valve (7) and the ratio range of air inlet adjustment valve (7) overall length (L0).
3. a kind of variable-geometry volute casing device according to claim 2, it is characterized in that: the two ends of described air inlet adjustment valve (7) are respectively ramp structure, described spiral case inwall (16) above and on the first pneumatic barrier (10) is respectively equipped with the fitting surface matched with the two ends of air inlet adjustment valve (7).
4. a kind of variable-geometry volute casing device according to claim 3, is characterized in that: described air inlet adjustment valve shaft (15) is arranged on one end end of air inlet adjustment valve (7) near the first pneumatic barrier (10).
5. a kind of variable-geometry volute casing device according to claim 4, it is characterized in that: described air inlet adjustment valve (7) is ramp structure away from one end of air inlet adjustment valve shaft (15), described spiral case inwall (16) is provided with the fitting surface matched with air inlet adjustment valve (7).
CN201210087157.3A 2012-03-29 2012-03-29 Variable-geometry volute casing device Active CN102852572B (en)

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CN103670628B (en) * 2013-12-19 2017-01-11 湖南大学 Exhaust turbine generator

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