CN204312393U - With the turbosupercharger of gas compressor arc diagonal impeller - Google Patents
With the turbosupercharger of gas compressor arc diagonal impeller Download PDFInfo
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- CN204312393U CN204312393U CN201420675972.6U CN201420675972U CN204312393U CN 204312393 U CN204312393 U CN 204312393U CN 201420675972 U CN201420675972 U CN 201420675972U CN 204312393 U CN204312393 U CN 204312393U
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Abstract
With a turbosupercharger for gas compressor arc diagonal impeller, comprise turbine box, bearing support, gas compressor pressure shell, rotor shaft, turbine rotor, thrust plate, gas compressor arc diagonal impeller, thrust bearing, stuffing box gland, thermal shield, oil sealing cap, seal ring.Turbine box is connected with bearing support by collar cover, thermal shield is arranged between turbine box and the Transverse plane of bearing support, turbine rotor is fixedly mounted on one end of rotor shaft, rotor shaft is arranged on the sliding bearing inner ring on bearing support, thrust plate, stuffing box gland and gas compressor arc diagonal impeller are arranged on the other end of rotor shaft successively, and be fixed on rotor shaft by nut, thrust bearing is arranged on the cylindrical of stuffing box gland, and be fixed by screws on bearing support, pressure side seal ring is arranged on the circular bosses of stuffing box gland, oil sealing cap to be sleeved on stuffing box gland and to be fixed in bearing support, gas compressor pressure shell is connected with bearing support with pressing plate by screw.
Description
Technical field
The utility model relates to turbo-charger technical field, particularly a kind of by adopting arc diagonal impeller to reduce compressor impeller thrust load and easily producing the turbosupercharger of backflow under improving pressurized machine small flow in vaneless diffuser import wheel rim side.
Background technique
Turbosupercharger utilizes engine exhaust to drive turbo machine, rotating turbine drives coaxial gas compressor work, and gas compressor will enter the compresses fresh air of motor, thus add the air inflow of motor, improve the power of motor, reduce the oil consumption of motor.
Existing turbosupercharger as shown in Figure 1, comprises turbine box 1, bearing support 2, gas compressor pressure shell 3, rotor shaft 4, turbine rotor 5, thrust plate 6, compressor impeller 7, thrust bearing 8, stuffing box gland 9, thermal shield 10, oil sealing cap 11, seal ring 12.
Turbine box 1 is connected with bearing support 2 by collar cover, thermal shield 10 is arranged between the Transverse plane of turbine box 1 and bearing support 2, turbine rotor 5 is fixedly mounted on one end of rotor shaft 4, rotor shaft 4 is arranged on the sliding bearing inner ring on bearing support 2, thrust plate 6, stuffing box gland 9 and compressor impeller 7 are arranged on the other end of rotor shaft 4 successively, and be fixed on rotor shaft 4 by nut, thrust bearing 8 is arranged on the cylindrical of stuffing box gland 9, and be fixed by screws on bearing support 2, pressure side seal ring 12 is arranged on the circular bosses of stuffing box gland 9, oil sealing cap 11 to be sleeved on stuffing box gland 9 and to be fixed in bearing support 2, gas compressor pressure shell 3 is connected with bearing support 2 with pressing plate by screw.
The radial-flow impeller 7 that existing turbosupercharger adopts is as accompanying drawing 3, shown in 4, comprise wheel hub 7-1, plural pieces linear leaf 7-2 and plural pieces short blade 7-3, linear leaf 7-2 is the same with the quantity of short blade 7-3, cross-shaped being evenly distributed on of linear leaf 7-2 and short blade 7-3 is drawn together on wheel hub 7-1, linear leaf 7-2 flow outlet top 7-2-1 is parallel with the axle centre of wheel hub 7-1 with short blade 7-3 flow outlet top 7-3-1, the excircle configuration diameter of linear leaf 7-2 flow outlet top 7-2-1 is consistent with the excircle configuration diameter of short blade 7-3 flow outlet top 7-3-1 and the wheel diameter of wheel hub 1, be all D1.
Along with turbosupercharger is to high rotating speed, high pressure ratio future development, whole turbocharger bearing system undergos acid test, compressor pressure ratio raises, result in the thrust load increase being pointed to pressure side by turbosupercharger whirlpool end, the thrust load of impeller mainly refers to that compressor inlet is to the pressure P 2 in the pressure P 1 of impeller leading faces and impeller wheel back of the body gap, air compressor wheel carries on the back gap internal pressure P2 when pressurized machine runs well all higher than inlet pressure P1, when the thrust load that impeller wheel back of the body gap internal pressure P2 produces is excessive, oil film between thrust bearing 8 and thrust plate 6 is not enough to bear thrust load and cause the dry friction between part to increase the weight of, under high rotating speed effect, thrust bearing 8 very quick-wearing lost efficacy, impeller blade friction compressor casing is then caused to damage pressurized machine time serious.
Radial-flow impeller traditional besides easily produces backflow in vaneless diffuser import wheel rim side under pressurized machine small flow.
At turbosupercharger industry field, mainly start with from two aspects for overcoming thrust load increase, one is by designing new axial bearing surface structure, increase the bearing capacity of oil film, the thrust load numerical value that thrust bearing be can bear increases, this solution can not reduce the thrust load of the compressor impeller wheel back of the body, and when the thrust load of the impeller wheel back of the body is excessive, turbine rotor system and thrust bearing still can produce directly to contact and dry grind; Two is that reach the object indirectly reducing thrust load, but consequent problem is, after increasing turbine box runner, the low-speed performance of motor can be a greater impact, and lays particular emphasis on low-speed performance disagree with present engine by increasing turbine box runner A/R value.
Summary of the invention
The purpose of this utility model be overcome prior art above-mentioned deficiency and a kind of turbosupercharger with gas compressor arc diagonal impeller is provided, one is the thrust load reducing to act on the hub disk back side by reducing hub disk area, prevents booster thrust bearing produced inefficacy and the pressurized machine fault that causes; Two is adopt the outlet of arc oblique flow in the outlet of blade, the too large and impeller outlet exhibition that causes of wheel rim curvature is improved to the uneven state of Flow Field Distribution by the outlet of arc oblique flow, and the arc diameter that can export sideline by adjusting vane regulates the design parameter level of impeller, improves the working efficiency of gas compressor.
The technical solution of the utility model is: a kind of turbosupercharger with gas compressor arc diagonal impeller, comprises turbine box, bearing support, gas compressor pressure shell, rotor shaft, turbine rotor, thrust plate, compressor impeller, thrust bearing, stuffing box gland, thermal shield, oil sealing cap, seal ring.
Turbine box is connected with bearing support by collar cover, thermal shield is arranged between turbine box and the Transverse plane of bearing support, turbine rotor is fixedly mounted on one end of rotor shaft, rotor shaft is arranged on the sliding bearing inner ring on bearing support, thrust plate, stuffing box gland and compressor impeller are arranged on the other end of rotor shaft successively, and be fixed on rotor shaft by nut, thrust bearing is arranged on the cylindrical of stuffing box gland, and be fixed by screws on bearing support, pressure side seal ring is arranged on the circular bosses of stuffing box gland, oil sealing cap to be sleeved on stuffing box gland and to be fixed in bearing support, gas compressor pressure shell is connected with bearing support with pressing plate by screw.
Described compressor impeller adopts arc diagonal impeller, arc diagonal impeller comprises wheel hub, four ~ six linear leafs and four ~ six short blades, linear leaf is the same with the quantity of short blade, linear leaf and cross-shaped being evenly distributed on of short blade are drawn together on wheel hub, the flow outlet top of linear leaf and the flow outlet top of short blade are arcuate structure, the blade tip excircle configuration diameter of the arc hypotenuse at the arc hypotenuse at linear leaf arc outflow opening top and short blade arc oblique flow outlet top is D1, the blade root excircle configuration diameter of the arc hypotenuse at the arc hypotenuse at linear leaf arc outflow opening top and short blade arc oblique flow outlet top is D2, D2 is less than D1, the excircle configuration at arc hypotenuse blade root position is consistent with the wheel disc outside diameter of wheel hub.
When turbosupercharger runs well, act on the thrust load F of impeller primarily of compressor inlet impeller leading faces pressure P 1, pressure P 2 in impeller wheel back of the body gap and the area of contact of gas and impeller determine, F=F2-F1, F1 is the thrust load that P1 acts on impeller front surface, F2 is the thrust load that P2 acts on the impeller wheel back of the body, and compressor impeller wheel carries on the back gap internal pressure P2 when pressurized machine runs well all higher than inlet pressure P1, when after the long-pending reduction in the impeller wheel back side, lifting surface area is also along with reduction, act on impeller wheel back surface load F2 fall and will be greater than the amplitude acting on impeller front surface thrust load F1 and decline, cause taking turns the back of the body by impeller thus and point to the load reduction of impeller leading faces direction, along with the rising of rotating speed, axial load forces F on diagonal impeller reduces more obvious, reduce the loading force that thrust bearing bears, effectively improve the operation conditions of turbosupercharger.
The outlet of arc oblique flow is adopted besides in the outlet of blade, the too large and impeller outlet exhibition that causes of wheel rim curvature is improved to the uneven state of Flow Field Distribution by the outlet of arc oblique flow, and the arc diameter that can export sideline by adjusting vane regulates the design parameter level of impeller, improves the working efficiency of gas compressor.
The utility model compared with prior art has following features:
1, on existing radial flow impeller pressurized machine, change blade wheel structure, reduce impeller wheel back of the body exradius, the surface load F2 of the impeller wheel back of the body is reduced by reducing stress surface, realize the thrust load reducing rotor-support-foundation system, avoid thrust bearing and reduce the life-span because bearing larger axis to load, improve the global reliability of pressurized machine.
2, the too large and impeller outlet exhibition that causes of wheel rim curvature is improved to the uneven state of Flow Field Distribution by the outlet of arc oblique flow, and the arc diameter that can export sideline by adjusting vane regulates the design parameter level of impeller, improves the working efficiency of gas compressor.
Below in conjunction with the drawings and specific embodiments, detailed construction of the present utility model is further described.
Accompanying drawing explanation
Accompanying drawing 1 is existing turbocharger arrangement schematic diagram;
Accompanying drawing 2 is the I portion enlarged view in accompanying drawing 1;
Accompanying drawing 3 is existing radial-flow impeller structural representation;
Accompanying drawing 4 is the A-A sectional view in accompanying drawing 3;
Accompanying drawing 5 is the turbocharger arrangement schematic diagram of band gas compressor arc diagonal impeller;
Accompanying drawing 6 is the structural representation of arc diagonal impeller;
Accompanying drawing 7 is the B-B sectional view in accompanying drawing 6;
Accompanying drawing 8 is the II portion enlarged view in 7.
Embodiment
With a turbosupercharger for gas compressor arc diagonal impeller, comprise turbine box 1, bearing support 2, gas compressor pressure shell 3, rotor shaft 4, turbine rotor 5, thrust plate 6, compressor impeller 13, thrust bearing 8, stuffing box gland 9, thermal shield 10, oil sealing cap 11, seal ring 12.
Turbine box 1 is connected with bearing support 2 by collar cover, thermal shield 10 is arranged between the Transverse plane of turbine box 1 and bearing support 2, turbine rotor 5 is fixedly mounted on one end of rotor shaft 4, rotor shaft 4 is arranged on the sliding bearing inner ring on bearing support 2, thrust plate 6, stuffing box gland 9 and compressor impeller 13 are arranged on the other end of rotor shaft 4 successively, and be fixed on rotor shaft 4 by nut, thrust bearing 8 is arranged on the cylindrical of stuffing box gland 9, and be fixed by screws on bearing support 2, pressure side seal ring 12 is arranged on the circular bosses of stuffing box gland 9, oil sealing cap 11 to be sleeved on stuffing box gland 9 and to be fixed in bearing support 2, gas compressor pressure shell 3 is connected with bearing support 2 with pressing plate by screw.
Described compressor impeller adopts arc diagonal impeller, arc diagonal impeller 13 comprises wheel hub 13-1, five linear leaf 13-2 and five short blade 13-3, cross-shaped being evenly distributed on of linear leaf 13-2 and short blade 13-3 is drawn together on wheel hub 13-1, the flow outlet top of linear leaf 13-2 and the flow outlet top of short blade 13-3 are arcuate structure, the blade tip excircle configuration diameter of the arc hypotenuse 13-3-1 at the arc hypotenuse 13-2-1 at linear leaf 13-2 arc outflow opening top and short blade 13-3 arc oblique flow outlet top is D1, the blade root excircle configuration diameter of the arc hypotenuse 13-3-1 at the arc hypotenuse 13-2-1 at linear leaf 13-2 arc outflow opening top and short blade 13-3 arc oblique flow outlet top is D2, D2 is less than D1, the excircle configuration at arc hypotenuse blade root position is consistent with the wheel disc outside diameter of wheel hub 13-1.
Claims (1)
1. the turbosupercharger with gas compressor arc diagonal impeller, comprises turbine box, bearing support, gas compressor pressure shell, rotor shaft, turbine rotor, thrust plate, compressor impeller, thrust bearing, stuffing box gland, thermal shield, oil sealing cap, seal ring;
Turbine box is connected with bearing support by collar cover, thermal shield is arranged between turbine box and the Transverse plane of bearing support, turbine rotor is fixedly mounted on one end of rotor shaft, rotor shaft is arranged on the sliding bearing inner ring on bearing support, thrust plate, stuffing box gland and gas compressor arc diagonal impeller are arranged on the other end of rotor shaft successively, and be fixed on rotor shaft by nut, thrust bearing is arranged on the cylindrical of stuffing box gland, and be fixed by screws on bearing support, pressure side seal ring is arranged on the circular bosses of stuffing box gland, oil sealing cap to be sleeved on stuffing box gland and to be fixed in bearing support, gas compressor pressure shell is connected with bearing support with pressing plate by screw,
It is characterized in that: described compressor impeller adopts arc diagonal impeller, arc diagonal impeller comprises wheel hub, four ~ six linear leafs and four ~ six short blades, linear leaf is the same with the quantity of short blade, linear leaf and cross-shaped being evenly distributed on of short blade are drawn together on wheel hub, the flow outlet top of linear leaf and the flow outlet top of short blade are arcuate structure, the blade tip excircle configuration diameter of the arc hypotenuse at the arc hypotenuse at linear leaf arc outflow opening top and short blade arc oblique flow outlet top is D1, the blade root excircle configuration diameter of the arc hypotenuse at the arc hypotenuse at linear leaf arc outflow opening top and short blade arc oblique flow outlet top is D2, D2 is less than D1, the excircle configuration at arc hypotenuse blade root position is consistent with the wheel disc outside diameter of wheel hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675972.6U CN204312393U (en) | 2014-11-13 | 2014-11-13 | With the turbosupercharger of gas compressor arc diagonal impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420675972.6U CN204312393U (en) | 2014-11-13 | 2014-11-13 | With the turbosupercharger of gas compressor arc diagonal impeller |
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| CN204312393U true CN204312393U (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420675972.6U Active CN204312393U (en) | 2014-11-13 | 2014-11-13 | With the turbosupercharger of gas compressor arc diagonal impeller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109196230A (en) * | 2016-03-30 | 2019-01-11 | 三菱重工发动机和增压器株式会社 | Impeller, rotating machinery, turbocharger |
-
2014
- 2014-11-13 CN CN201420675972.6U patent/CN204312393U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109196230A (en) * | 2016-03-30 | 2019-01-11 | 三菱重工发动机和增压器株式会社 | Impeller, rotating machinery, turbocharger |
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