CN201310386Y - Oblique flow type exhaust turbine pressure booster - Google Patents
Oblique flow type exhaust turbine pressure booster Download PDFInfo
- Publication number
- CN201310386Y CN201310386Y CNU2008202152846U CN200820215284U CN201310386Y CN 201310386 Y CN201310386 Y CN 201310386Y CN U2008202152846 U CNU2008202152846 U CN U2008202152846U CN 200820215284 U CN200820215284 U CN 200820215284U CN 201310386 Y CN201310386 Y CN 201310386Y
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- gas
- turbine
- runner
- flow channel
- annular
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- Expired - Fee Related
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- Supercharger (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to the technical field of machinery, in particular to an oblique flow type exhaust turbine pressure booster for an internal combustion engine, which comprises a turbine shell and a turbine disposed inside the turbine shell, wherein an annular gas flow channel with a flat bottom pear-shaped cross-section is disposed inside the turbine shell, an annular injecting nozzle for blowing gas to the turbine is arranged at the inner ring position of the annular flow channel, a flow channel direction of the annular injecting nozzle on a meridian plane and an axis of the turbine forms an included angle (alpha) ranging from 40 degrees to 50 degrees, the turbine has at least 9 blades, a gas driving flow channel is formed between the turbine and the inner wall of the turbine shell via adjacent blades, and the annular gas flow channel is communicated with the gas driving flow channel via the annular injecting nozzle, the gas driving flow channel is provided with an air inlet communicated with the annular gas flow channel and an air outlet for discharging gas, outer envelope lines of folding surface circles of a cross-section of the gas driving flow channel are straight lines, cross-sectional area of the gas driving flow channel is gradually enlarged from the air inlet direction to the air outlet direction, and an air outlet surface of the annular injecting nozzle is parallel to an air inlet surface of the turbine, thereby improving flow efficiency.
Description
Technical field
The utility model relates to field of mechanical technique, especially a kind of diagonal flow type exhaust-gas turbocharger that is applied to internal-combustion engine.
Background technique
At present, exhaust-gas turbocharger is widely used on diesel engine and the novel automobile petrol engine.The internal-combustion engine that has a large capacity and a wide range adopts exhaust-gas turbocharger, has increased air quantity in same swept volume, can many oil spouts, and improved combustion process, thereby increased substantially the specific power of internal-combustion engine, and reduced specific fuel consumption, reduced the pollutant in the exhaust.
Exhaust gas turbocharger mainly is made up of turbine and gas compressor two large divisions.Turbine can be divided into radial-flow type, axial flow and three kinds of forms of diagonal flow type by the gas flow direction difference.Radial-flow type can be divided into radial inflow and centrifugal two types again.Common vehicle supercharger generally is the radial inflow radial-flow turbine.
The radial inflow radial-flow turbine, working medium radially enters impeller by the nozzle ring of turbine case, and the acting of expanding in impeller is axially flowed out then.Because flow direction changes 90 ° in impeller, produced the bump loss, limited the further raising of flow efficiency in the turbine.
The model utility content
The technical problems to be solved in the utility model is: the diagonal flow type exhaust-gas turbocharger that a kind of flow efficiency height, reliable operation are provided.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of diagonal flow type exhaust-gas turbocharger, has volute, be arranged on the turbine in the volute, has the annular air runner in the volute, the outer annular surface of annular air runner is the bottom of runner, the axial cross section of annular air runner is flat pyriform, dwindled the radial dimension of volute, the variation of cross-sectional sizes and gas flow is synchronous, improved gas flow, guarantee that turbine inlet speed is even, offer on the internal ring portion position of annular air runner and be used for the ring nozzle that gas blows to turbine, ring nozzle at the angle (α) between the axis of runner direction on the meridian plane and turbine between 40 °～50 °, gas is an amount of from the Mach number of the ring nozzle rate of outflow, prevented the generation of first-harmonic, turbine has 9 wheel sheets at least, form the gas-powered runner by the adjacent wheels sheet between turbine and volute inwall, the annular air runner is communicated with by ring nozzle with the gas-powered runner, the gas-powered runner has the suction port that is communicated with the annular air runner, be used for the air outlet that gas flows out, the enveloping outer enclosure that the gas-powered flow channel cross-section is amounted to the face circle is a straight line, improved the efficient that flows, the gas-powered cross section of fluid channel is long-pending to be gradually expanding shape by suction port towards the direction of air outlet, reduced the loss of kinetic energy, the actinal surface of giving vent to anger of ring nozzle is parallel with the air inlet actinal surface of turbine, and the kinetic energy that makes full use of waste gas promotes the rotation of turbine.
In order further to reduce the loss of kinetic energy, the ratio of the air outlet of gas-powered runner and suction port area is 1.2～1.3: 1.0.
The beneficial effects of the utility model are that a kind of diagonal flow type exhaust-gas turbocharger of the present utility model has reduced the various flow losses in ring nozzle and the turbine runner, has improved the adiabatic efficiency of turbine; Alleviate vibration, improved the functional reliability of turbine; Reduced the abnormal sound source.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the overall structure schematic representation of a kind of diagonal flow type exhaust-gas turbocharger of the utility model.
1. volutes among the figure, 2. turbine, 3. annular air runner, 4. bottom, 5. ring nozzle, 6. gas-powered runner, 7. suction port, 8. air outlet.
Embodiment
With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the schematic representation of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
A kind of diagonal flow type exhaust-gas turbocharger of preferred forms as shown in Figure 1, has volute 1, be arranged on the turbine 2 in the volute 1, has annular air runner 3 in the volute 1, the outer annular surface of annular air runner 3 is the bottom 4 of runner, the axial cross section of annular air runner 3 is flat pyriform, dwindled the radial dimension of volute 1, offer on the internal ring portion position of annular air runner 3 and be used for the ring nozzle 5 that gas blows to turbine 2, ring nozzle 5 at the angle (α) between the axis of runner direction on the meridian plane and turbine 2 between 40 °～50 °, gas is an amount of from the Mach number of ring nozzle 5 rates of outflow, prevented the generation of first-harmonic, turbine 2 has 9 wheel sheets at least, form gas-powered runner 6 by the adjacent wheels sheet between turbine 2 and volute 1 inwall, annular air runner 3 is communicated with by ring nozzle 5 with gas-powered runner 6, gas-powered runner 6 has the suction port 7 that is communicated with annular air runner 3, be used for the air outlet 8 that gas flows out, the enveloping outer enclosure that gas-powered runner 6 cross sections are amounted to the face circle is a straight line, 8 direction is gradually expanding shape to gas-powered runner 6 sectional areas towards the air outlet by suction port 7, the ratio of the air outlet 8 of gas-powered runner 6 and suction port 7 areas is 1.2～1.3: 1.0, the actinal surface of giving vent to anger of ring nozzle 5 is parallel with the air inlet actinal surface of turbine 2, and the kinetic energy that makes full use of waste gas promotes the rotation of turbine 2.
When the utility model is implemented, the waste gas that emits enters in the annular air runner 3 in the volute 1, because the gathering of waste gas is more and more, enter into the gas-powered runner 6 of turbine 2 then from ring nozzle 5, because gas has certain kinetic energy, having driven turbine 2 is rotated, gas then flows out from the air outlet 8 of gas-powered runner 6, a large amount of gas constantly enters into gas-powered runner 6, constantly flow out from the air outlet 8 of gas-powered runner 6, make that the momentum transfer of gas is the kinetic energy of turbine 2, make turbine 2 constantly rotate, drive the impeller corresponding and rotate with turbine 2.
With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this model utility technological thought.The technical scope of this model utility is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (2)
1. diagonal flow type exhaust-gas turbocharger, has volute (1), be arranged on the turbine (2) in the volute (1), it is characterized in that: have annular air runner (3) in the volute (1), the outer annular surface of annular air runner (3) is the bottom (4) of runner, the axial cross section of annular air runner (3) is flat pyriform, offer the ring nozzle (5) that is used for gas and blows to turbine on the internal ring portion position of annular air runner (3), the angle (α) of ring nozzle (5) between the axis of runner direction on the meridian plane and turbine (2) is between 40 °～50 °, turbine (2) has 9 wheel sheets at least, form gas-powered runner (6) by the adjacent wheels sheet between turbine (2) and volute (1) inwall, annular air runner (3) is communicated with by ring nozzle (5) with gas-powered runner (6), gas-powered runner (6) has the suction port (7) that is communicated with annular air runner (3), be used for the air outlet (8) that gas flows out, the enveloping outer enclosure that gas-powered runner (6) cross section is amounted to the face circle is a straight line, the direction of (8) is gradually expanding shape to gas-powered runner (6) sectional area towards the air outlet by suction port (7), and the actinal surface of giving vent to anger of ring nozzle (5) is parallel with the air inlet actinal surface of turbine.
2. according to claim 1 described a kind of diagonal flow type exhaust-gas turbocharger, it is characterized in that: the ratio of the air outlet (7) of described gas-powered runner (6) and suction port (8) area is 1.2～1.3: 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202152846U CN201310386Y (en) | 2008-12-09 | 2008-12-09 | Oblique flow type exhaust turbine pressure booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202152846U CN201310386Y (en) | 2008-12-09 | 2008-12-09 | Oblique flow type exhaust turbine pressure booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201310386Y true CN201310386Y (en) | 2009-09-16 |
Family
ID=41107640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202152846U Expired - Fee Related CN201310386Y (en) | 2008-12-09 | 2008-12-09 | Oblique flow type exhaust turbine pressure booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201310386Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296990A (en) * | 2010-06-25 | 2011-12-28 | 丛洋 | improved compressed gas engine |
| CN102606530A (en) * | 2011-01-18 | 2012-07-25 | 德昌电机(深圳)有限公司 | Centrifugal device and cleaning device |
| CN105392975A (en) * | 2013-07-05 | 2016-03-09 | 株式会社Ihi | Scroll part structure and supercharger |
-
2008
- 2008-12-09 CN CNU2008202152846U patent/CN201310386Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296990A (en) * | 2010-06-25 | 2011-12-28 | 丛洋 | improved compressed gas engine |
| CN102606530A (en) * | 2011-01-18 | 2012-07-25 | 德昌电机(深圳)有限公司 | Centrifugal device and cleaning device |
| CN105392975A (en) * | 2013-07-05 | 2016-03-09 | 株式会社Ihi | Scroll part structure and supercharger |
| CN105392975B (en) * | 2013-07-05 | 2017-09-26 | 株式会社Ihi | Scroll structure and booster |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20121209 |