CN204511532U - Nozzle ring capable of changing cross sections, turbosupercharger and motor - Google Patents
Nozzle ring capable of changing cross sections, turbosupercharger and motor Download PDFInfo
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- CN204511532U CN204511532U CN201520056462.5U CN201520056462U CN204511532U CN 204511532 U CN204511532 U CN 204511532U CN 201520056462 U CN201520056462 U CN 201520056462U CN 204511532 U CN204511532 U CN 204511532U
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- 239000007789 gas Substances 0.000 description 62
- 239000002912 waste gas Substances 0.000 description 50
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000035126 Facies Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Abstract
The utility model provides a kind of nozzle ring capable of changing cross sections, turbosupercharger and motor.Nozzle ring capable of changing cross sections described in the utility model, comprise rotating ring, fixed ring, at least one rocking arm and at least one nozzle blade; one end of rocking arm is connected with rotating ring, the other end is connected with nozzle blade by rotating shaft; rotating shaft is positioned on fixed ring through fixed ring to make nozzle blade; the circumference along fixed ring is provided with multiple nozzle blade; one of them nozzle blade is defined as the first blade; with the first blade for starting point, and the length of the exhaust gas inlet end of the nozzle blade that the circumference along fixed ring is arranged increases successively; Or with the first blade for starting point, the angle of the convex portion of the exhaust gas inlet end of the nozzle blade that the circumference along fixed ring is arranged reduces successively.Nozzle ring capable of changing cross sections described in the utility model, turbosupercharger and motor can promote the efficiency of turbosupercharger.
Description
Technical field
The utility model relates to pressurized machine technical field, particularly a kind of nozzle ring capable of changing cross sections, turbosupercharger and motor.
Background technique
Along with the in-depth development of automobile industry, requirement for oil consumption and discharge is more and more subject to the attention of Business circle, and pressurized machine for discharge and oil consumption advantage also along with the expansion of using scope gradually by people cognition, each main engine factory are also all developing oneself supercharged engine.
The coupling of optimal turbosupercharger and motor is: during low engine speed, reduces the turbine actual internal area of pressurized machine and boost pressure is improved, thus improving the low-speed characteristic of motor; When high engine speeds, increase turbine actual internal area gradually, reduce boost pressure, make pressurized machine be unlikely to hypervelocity, cause the damage of pressurized machine.In order to reach above-mentioned requirements, VGT (Variable Geometry Turbocharger is employed in prior art, variable-area turbocharger), the actual internal area between adjacent nozzle ring blade can be changed, thus regulate the negotiability of whirlpool end, promote the utilization ratio of waste gas, promote low speed torque and the high speed performance of motor simultaneously, and then improve the performance of car load.
In prior art, at least there are the following problems: the runner of turbosupercharger reduces to throat location circumference from volute import gradually with certain proportion relation, the pressure of the gas in volute flow passage, temperature, flow velocity are not identical at diverse location, and the nozzle ring of VGT can not adjust accordingly according to the pressure of the gas of diverse location, temperature, change in flow, cause the utilization ratio of VGT to waste gas low.
Model utility content
In view of this, the utility model is intended to propose a kind of nozzle ring capable of changing cross sections, turbosupercharger and motor, to solve the low problem of the utilization ratio of VGT to waste gas.
For achieving the above object, the technical solution of the utility model is achieved in that
A kind of nozzle ring capable of changing cross sections, comprise rotating ring, fixed ring, at least one rocking arm and at least one nozzle blade, one end of described rocking arm is connected with described rotating ring, the other end is connected with described nozzle blade by rotating shaft, described rotating shaft is positioned on described fixed ring through described fixed ring to make described nozzle blade, circumference along described fixed ring is provided with multiple described nozzle blade, one of them nozzle blade is defined as the first blade, with described first blade for starting point, the length of the exhaust gas inlet end of the nozzle blade arranged along the circumference of described fixed ring increases successively, wherein, the length of the exhaust gas inlet end of described nozzle blade is the distance between the rotating center of nozzle blade and tail end center, or, with described first blade for starting point, the angle of the convex portion of the exhaust gas inlet end of the nozzle blade arranged along the circumference of described fixed ring reduces successively, wherein, line between the rotating center of nozzle blade and leaf turning point is the first line, line between the leaf turning point of nozzle blade and tail end center is the second line, and the angle of the convex portion of the exhaust gas inlet end of described nozzle blade is the angle between described first line and described second line.
Preferably, with described first blade for starting point, the length of the first line of the nozzle blade that the circumference along described fixed ring is arranged increases successively.
Preferably, with described first blade for starting point, the length of the second line of the nozzle blade that the circumference along described fixed ring is arranged increases successively.
Relative to prior art, nozzle ring capable of changing cross sections described in the utility model has following advantage:
The length of the exhaust gas inlet end of the nozzle blade that the fixed ring of the nozzle ring capable of changing cross sections that the utility model provides is arranged increases successively along the circumference of fixed ring, when the waste gas in runner enters nozzle ring, waste gas just flows into the first blade, length now due to the exhaust gas inlet end of the first blade is shorter, and it is longer against the length of the exhaust gas inlet end of the circumferential direction nozzle blade adjacent with the first blade along fixed ring, so a part of waste gas blocks the runner that will more easily flow in the middle of these two blades due to nozzle blade, simultaneously because the length of the exhaust gas inlet end of the first blade is shorter, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring between other nozzle blades, along with the increase gradually of the exhaust gas inlet end length of nozzle blade, in the runner that waste gas can be made more easily to be directed between nozzle blade, and then improve the utilization ratio of waste gas,
In addition, the angle of the convex portion of the exhaust gas inlet end of the nozzle blade that the circumference along fixed ring can also be arranged reduces successively, angle less then nozzle blade exhaust gas inlet end is about large at the height of vertical direction, namely the height of the exhaust gas inlet end of the first blade is less, and it is larger against the height of the exhaust gas inlet end of the circumferential direction nozzle blade adjacent with the first blade along fixed ring, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades due to nozzle blade, simultaneously because the height of the exhaust gas inlet end of the first blade is less, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring between other nozzle blades, along with the increase gradually of the exhaust gas inlet end height of other nozzle blades, in the runner that waste gas can be made more easily to be directed between nozzle blade, and then improve the utilization ratio of waste gas.
Another object of the present utility model is to propose a kind of turbosupercharger, comprises volute and turbine, and nozzle ring capable of changing cross sections as above is set on described turbine.
Preferably, when the nozzle blade aperture of described nozzle ring capable of changing cross sections is maximum, the tail end of the center of described turbine, the aditus laryngis center of described volute and described second blade is centrally located at same straight line, and wherein said second blade is the nozzle blade that the length of the exhaust gas inlet end adjacent with described first blade is the longest.
Another object of the present utility model is to propose a kind of motor, is provided with turbosupercharger as above.
The Dominant Facies that described turbosupercharger and described motor and above-mentioned nozzle ring capable of changing cross sections have relative to prior art with, do not repeat them here.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 a is the plan view of the nozzle ring capable of changing cross sections described in the utility model embodiment;
Fig. 1 b is the plan view of the nozzle ring capable of changing cross sections described in the utility model embodiment;
Fig. 2 is the worm's eye view of the nozzle ring capable of changing cross sections described in the utility model embodiment;
Fig. 3 is the plan view of the nozzle ring capable of changing cross sections described in the utility model embodiment;
Fig. 4 is the nozzle blade described in the utility model embodiment and rocker arm assembly figure;
Fig. 5 is the structural representation of the nozzle blade described in the utility model embodiment;
Fig. 6 is the Facad structure schematic diagram of the turbosupercharger described in the utility model embodiment;
Fig. 7 is the structure schematic diagram of the turbosupercharger described in the utility model embodiment.
Description of reference numerals:
1-rotating ring, 2-fixed ring, 3-rocking arm, 4-nozzle blade, 41-first blade, 42-second blade, 5-rotating shaft, 6-rotating center, 7-tail end center, 8-convex portion, the leaf turning point of 9-, 10-volute, 11-turbine, 12-aditus laryngis center, 13-waste gas outlet, 14-volute pin-and-hole.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Embodiment of the present utility model provides a kind of nozzle ring capable of changing cross sections, see Fig. 1 a, Fig. 1 b, and shown in Fig. 2-Fig. 4, comprise rotating ring 1, fixed ring 2, at least one rocking arm 3 and at least one nozzle blade 4, one end of rocking arm 3 is connected with rotating ring 1, the other end is connected with nozzle blade 4 by rotating shaft 5, rotating shaft 5 is positioned on fixed ring 2 through fixed ring 2 to make nozzle blade 4, circumference along fixed ring 2 is provided with multiple nozzle blade 4, one of them nozzle blade 4 is defined as first jet ring blade 41, with first jet ring blade 41 for starting point, the length of the exhaust gas inlet end of the nozzle blade 4 arranged along the circumference of fixed ring 2 increases successively, wherein, the length of the exhaust gas inlet end of nozzle blade 4 is the distance between the rotating center 6 of nozzle blade 4 and tail end center 7, or, with first jet ring blade 41 for starting point, the angle of the convex portion 8 of the exhaust gas inlet end of the nozzle blade 4 arranged along the circumference of fixed ring 2 reduces successively, wherein, line between the rotating center 6 of nozzle blade 4 and leaf turning point 9 is the first line, line between the leaf turning point 9 of nozzle blade 4 and tail end center 7 is the second line, and the angle of the convex portion of the exhaust gas inlet end of nozzle blade 4 is the angle between the first line and the second line.
The length of the exhaust gas inlet end of the nozzle blade 4 that the fixed ring 2 of the nozzle ring capable of changing cross sections that the utility model provides is arranged increases successively along the circumference of fixed ring 2, when the waste gas in runner enters nozzle ring, waste gas just flows into first jet ring blade 41, length now due to the exhaust gas inlet end of first jet ring blade 41 is shorter, and it is longer against the length of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the length of the exhaust gas inlet end of first jet ring blade 41 is shorter, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end length of nozzle blade 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas,
In addition, the angle of the convex portion 8 of the exhaust gas inlet end of the nozzle blade 4 that the circumference along fixed ring 2 can also be arranged reduces successively, angle less then nozzle blade 4 exhaust gas inlet end is about large at the height of vertical direction, namely the height of the exhaust gas inlet end of first jet ring blade 41 is less, and it is larger against the height of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the height of the exhaust gas inlet end of first jet ring blade 41 is less, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end height of other nozzle blades 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas.
Further, shown in Fig. 2 and Fig. 4, nozzle blade 4 and rocking arm 3 are welded together by rotating shaft 5; one end of rocking arm 3 is fixed on rotating ring 1; rotating ring 1 can rotate by several angle; and then drive rocking arm 3 to rotate, and rocking arm 3 drives nozzle blade 4 to rotate by rotating shaft 5, and then realizes the flow direction of the waste gas flowed through between two nozzle blades 4 and the control of flow velocity.
Preferably, shown in Fig. 1 a, Fig. 1 b and Fig. 5, with described first jet ring blade 41 for starting point, the length of the first line of the nozzle blade 4 that the circumference along described fixed ring 2 is arranged increases successively, and the first line is the line between the rotating center 6 of nozzle blade 4 and leaf turning point 9.Such as, the length of the first line of first jet ring blade 41 is the shortest in all nozzle blades 4, and the length along the first line of the anticlockwise nozzle blade 4 of fixed ring 2 increases gradually.The object of above-mentioned setting is to realize the object increased successively along the length of the exhaust gas inlet end of the upper nozzle blade 4 arranged of fixed ring 2 circumference, when the design specification of nozzle blade 4 is identical, the length of the exhaust gas inlet end of nozzle blade 4 depends on the distance between rotating center 6 and tail end center 7, and rotating center 6, line between tail end center 7 and leaf turning point 9 three forms convex portion 8, this convex portion 8 is triangle, when leg-of-mutton shape invariance, the length on one of them limit increases, then in order to keep shape, the length on other limit also needs corresponding increase, therefore when increasing gradually along the first wire length of the nozzle blade 4 surely changed in circumference, can ensure that the length of the exhaust gas inlet end of nozzle blade 4 also increases successively, and then the utilization ratio improved waste gas.
Preferably, shown in Fig. 1 a, Fig. 1 b and Fig. 5, with described first jet ring blade 41 for starting point, the length of the second line of the nozzle blade 4 that the circumference along described fixed ring 2 is arranged increases successively, and the second line is the line between the leaf turning point 9 of nozzle blade 4 and tail end center 7.Such as, the length of the second line of first jet ring blade 41 is the shortest in all nozzle blades 4, and the length along the second line of the anticlockwise nozzle blade 4 of fixed ring 2 increases gradually.The object of above-mentioned setting is to realize the object increased successively along the length of the exhaust gas inlet end of the upper nozzle blade 4 arranged of fixed ring 2 circumference, when the design specification of nozzle blade 4 is identical, the length of the exhaust gas inlet end of nozzle blade 4 depends on the distance between rotating center 6 and tail end center 7, and rotating center 6, line between tail end center 7 and leaf turning point 9 three forms convex portion 8, this convex portion 8 is triangle, when leg-of-mutton shape invariance, the length on one of them limit increases, then in order to keep shape, the length on other limit also needs corresponding increase, therefore when increasing gradually along the second wire length of the nozzle blade 4 surely changed in circumference, can ensure that the length of the exhaust gas inlet end of nozzle blade 4 also increases successively, and then the utilization ratio improved waste gas.
Embodiment of the present utility model provides a kind of turbosupercharger, shown in Figure 6, and comprise volute 10 and turbine 11, the nozzle ring capable of changing cross sections described in above-described embodiment is set on turbine 11.
The length of the exhaust gas inlet end of the nozzle blade 4 that the fixed ring 2 of the nozzle ring capable of changing cross sections that the turbosupercharger that the utility model provides uses is arranged increases successively along the circumference of fixed ring 2, when the waste gas in runner enters nozzle ring, waste gas just flows into first jet ring blade 41, length now due to the exhaust gas inlet end of first jet ring blade 41 is shorter, and it is longer against the length of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the length of the exhaust gas inlet end of first jet ring blade 41 is shorter, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end length of nozzle blade 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas, improve the efficiency of turbosupercharger,
In addition, the angle of the convex portion 8 of the exhaust gas inlet end of the nozzle blade 4 that the circumference along fixed ring 2 can also be arranged reduces successively, angle less then nozzle blade 4 exhaust gas inlet end is about large at the height of vertical direction, namely the height of the exhaust gas inlet end of first jet ring blade 41 is less, and it is larger against the height of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the height of the exhaust gas inlet end of first jet ring blade 41 is less, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end height of other nozzle blades 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas, improve the efficiency of turbosupercharger.
Preferably, when the blade opening of nozzle ring capable of changing cross sections is maximum, the tail end of the center of turbine 11, the aditus laryngis center 12 of volute 10 and second nozzle ring blade 42 is centrally located at same straight line, and wherein second nozzle ring blade 42 is the blade that the length of the exhaust gas inlet end adjacent with first jet ring blade 41 is the longest.Above-mentioned design can ensure that the utilization ratio of the waste gas entered from volute flow passage ingress is the highest.
Further, shown in Figure 7, being connected with waste gas outlet 13 below of described turbine 11, waste gas outlet side is provided with volute pin-and-hole 14.After variable-area nozzle is installed in turbosupercharger, another fixed ring on variable-area nozzle contacts with volute 10, variable-area nozzle assembly and volute 10 rely on the volute pin-and-hole 14 on the positioning pin hole in fixed ring and volute 10 to locate, and ensure the relative position of variable-area nozzle assembly and volute 10.
Embodiment of the present utility model provides a kind of motor, is provided with the turbosupercharger as above described in embodiment.
Turbosupercharger is provided with in the motor that the utility model provides, the length of the exhaust gas inlet end of the nozzle blade 4 that the fixed ring 2 of the nozzle ring capable of changing cross sections that this turbosupercharger uses is arranged increases successively along the circumference of fixed ring 2, when the waste gas in runner enters nozzle ring, waste gas just flows into first jet ring blade 41, length now due to the exhaust gas inlet end of first jet ring blade 41 is shorter, and it is longer against the length of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the length of the exhaust gas inlet end of first jet ring blade 41 is shorter, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end length of nozzle blade 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas, improve the power performance of motor,
In addition, the angle of the convex portion 8 of the exhaust gas inlet end of the nozzle blade 4 that the circumference along fixed ring 2 can also be arranged reduces successively, angle less then nozzle blade 4 exhaust gas inlet end is about large at the height of vertical direction, namely the height of the exhaust gas inlet end of first jet ring blade 41 is less, and it is larger against the height of the exhaust gas inlet end of the circumferential direction nozzle blade 4 adjacent with first jet ring blade 41 along fixed ring 2, so a part of waste gas blocks the runner that will more easily flow in the middle of these two nozzle blades 4 due to nozzle blade 4, simultaneously because the height of the exhaust gas inlet end of first jet ring blade 41 is less, another part can not enter the waste gas of above-mentioned runner can easier flow passage in fixed ring 2 between other nozzle blades 4, along with the increase gradually of the exhaust gas inlet end height of other nozzle blades 4, in the runner that waste gas can be made more easily to be directed between nozzle blade 4, and then improve the utilization ratio of waste gas, improve the power performance of motor.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a nozzle ring capable of changing cross sections, comprise rotating ring (1), fixed ring (2), at least one rocking arm (3) and at least one nozzle blade (4), one end of described rocking arm (3) is connected with described rotating ring (1), the other end is connected with described nozzle blade (4) by rotating shaft (5), described rotating shaft (5) is positioned on described fixed ring (2) through described fixed ring (2) to make described nozzle blade (4), circumference along described fixed ring (2) is provided with multiple described nozzle blade (4), it is characterized in that, one of them nozzle blade (4) is defined as the first blade (41), with described first blade (41) for starting point, the length of the exhaust gas inlet end of the nozzle blade (4) arranged along the circumference of described fixed ring (2) increases successively, wherein, the length of the exhaust gas inlet end of described nozzle blade (4) is the distance between the rotating center (6) of nozzle blade (4) and tail end center (7), or, with described first blade (41) for starting point, the angle of the convex portion (8) of the exhaust gas inlet end of the nozzle blade (4) arranged along the circumference of described fixed ring (2) reduces successively, wherein, line between the rotating center (6) of nozzle blade (4) and leaf turning point (9) is the first line, line between the leaf turning point (9) of nozzle blade (4) and tail end center (7) is the second line, the angle of the convex portion (8) of the exhaust gas inlet end of described nozzle blade (4) is the angle between described first line and described second line.
2. nozzle ring capable of changing cross sections according to claim 1, it is characterized in that, with described first blade (41) for starting point, the length of the first line of the nozzle blade (4) that the circumference along described fixed ring (2) is arranged increases successively.
3. nozzle ring capable of changing cross sections according to claim 2, it is characterized in that, with described first blade (41) for starting point, the length of the second line of the nozzle blade (4) that the circumference along described fixed ring (2) is arranged increases successively.
4. turbine (11) pressurized machine, comprises volute (10) and turbine (11), it is characterized in that, on turbine (11) as described in the nozzle ring capable of changing cross sections as described in any one of claim 1-3 is set in.
5. turbosupercharger according to claim 4, it is characterized in that, when nozzle blade (4) aperture of described nozzle ring capable of changing cross sections is maximum, the aditus laryngis center of the center of described turbine (11), described volute (10) and the tail end center (7) of the second blade (42) are positioned at same straight line, and wherein said second blade (42) is the nozzle blade (4) that the length of the exhaust gas inlet end adjacent with described first blade (41) is the longest.
6. a motor, is characterized in that, is provided with the turbosupercharger as described in claim 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056462.5U CN204511532U (en) | 2015-01-27 | 2015-01-27 | Nozzle ring capable of changing cross sections, turbosupercharger and motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520056462.5U CN204511532U (en) | 2015-01-27 | 2015-01-27 | Nozzle ring capable of changing cross sections, turbosupercharger and motor |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520056462.5U Expired - Fee Related CN204511532U (en) | 2015-01-27 | 2015-01-27 | Nozzle ring capable of changing cross sections, turbosupercharger and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026177A (en) * | 2018-08-24 | 2018-12-18 | 湖南天雁机械有限责任公司 | The variable variable-area turbocharger of blade path |
-
2015
- 2015-01-27 CN CN201520056462.5U patent/CN204511532U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026177A (en) * | 2018-08-24 | 2018-12-18 | 湖南天雁机械有限责任公司 | The variable variable-area turbocharger of blade path |
| CN109026177B (en) * | 2018-08-24 | 2023-09-22 | 湖南天雁机械有限责任公司 | Variable-section turbocharger with variable vane track |
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