CN203584474U - Outlet step ring - Google Patents
Outlet step ring Download PDFInfo
- Publication number
- CN203584474U CN203584474U CN201320671397.8U CN201320671397U CN203584474U CN 203584474 U CN203584474 U CN 203584474U CN 201320671397 U CN201320671397 U CN 201320671397U CN 203584474 U CN203584474 U CN 203584474U
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- China
- Prior art keywords
- step ring
- outlet
- volute
- utility
- model
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- Expired - Fee Related
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model discloses an outlet step ring. The outlet step ring comprises a vane wheel component, a pressing wheel component and a middle component, wherein the middle component is coaxially connected with the vane wheel component and the pressing wheel component; the vane wheel component comprises a vane wheel and a volute casing assembled at the outer part of the vane wheel; a clearance is reserved between the vane wheel and the volute casing; blades are assembled in the clearance reserved between the vane wheel and the volute casing; a step ring is formed in the inner wall surface of the volute casing; a clearance is reserved between the step ring and the outlet blade tip of one blade; the boss height of the step ring is less than or equal to the distance of the clearance. According to the utility model, by the modification of the inner wall surface of the volute casing, the turbine clearance leakage can be improved, so that the turbine motor flow characteristic can be improved, the driving power of a turbine to a supercharger compressor can be increased, and the engine air inflow can be increased, therefore, the turbocharged engine property can be improved.
Description
Technical field
The utility model relates to exhaust gas turbocharge engine art, particularly relates to a kind of outlet step ring.
Background technique
For the turbine part of conventional pressurized machine, owing to being provided with turbine blade in gap, not only can not guiding gas flow expansion do work, a channel is provided on the contrary, allow the high-pressure gas of part, by turbine inlet, rushed down the outlet port draining in low pressure, form loss in efficiency.
Each interlobate fuel gas flow in each turbine, also can, because of the reason of accelerating and rotating, form the flow field of high low pressure inequality simultaneously.The air-flow of high pressure can along the circumferential direction be walked around blade tip via gap and flow toward the flow field of low pressure, and this kind of leakage causes eddy current, forms another kind of loss in efficiency.
Leakage current impact due to the first kind, makes eddy current propagates down stream, to whole and main flow blending.The air-flow of these leakages, because they do not participate in all processes doing work in blade, causes the reduction of turbo machine output shaft work.If turbine blade-tip gap is excessive, serious, can make gas compressor supply gas pressure not enough, and then engine performance is lowered, deterioration of emission.
Model utility content
The technical problem that the utility model mainly solves is to provide a kind of outlet step ring, can suppress the leakage rate of turbine blade-tip gap, thereby improve engine performance.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of outlet step ring is provided, comprise: wheel member, puck components and the intermediate member that coaxially connects two parts, the volute that described wheel member comprises impeller and is assemblied in impeller outside, between described impeller and volute, be provided with gap, in described gap, be equipped with blade, on described volute internal face, offer a step ring, between described step ring and the outlet blade tip of blade, be provided with a gap, the boss height of described step ring is less than or equal to described clearance distance.
In preferred embodiment of the utility model, described step ring is to be processed to form on volute internal face.
In preferred embodiment of the utility model, described step ring is on volute internal face, to insert a lining to form.
In preferred embodiment of the utility model, described step ring is to be provided with a groove on described volute internal face, and described groove is embedded in a packing ring and forms.
In preferred embodiment of the utility model, described lining is fixed by screw or locating stud.
In preferred embodiment of the utility model, described packing ring is fixed by groove.
The beneficial effects of the utility model are: the utility model outlet step ring is by changing the wall of volute inwall, improving turbine clearance leaks, thereby improve turbine flow dynamic response, increase the driving power of turbine to supercharger air compressor, increase air input of engine by air, thereby improve the performance of turbosupercharged engine.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also according to these accompanying drawings, obtain other accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model outlet step ring one preferred embodiment;
Fig. 2 is the partial enlarged drawing that exports A place in step ring shown in Fig. 1;
In accompanying drawing, the mark of each parts is as follows: 1, puck components, 2, intermediate member, 3, volute, 4, impeller, 5, blade, 6, step ring, 7, gap.
Embodiment
Below the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making all other embodiments that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1 and Fig. 2, the utility model is embodiment comprise:
An outlet step ring, comprising: wheel member, puck components 1 and the intermediate member 2 that coaxially connects two parts, the volute 3 that described wheel member comprises impeller 4 and is assemblied in impeller 4 outsides.
Between described impeller 4 and volute 3, be provided with gap 7, in described gap 7, be equipped with blade 5, on described volute 3 internal faces, offer a step ring 6, between described step ring 6 and the outlet blade tip of blade 5, be provided with a gap 7, the boss height of described step ring 6 is less than or equal to described gap 7 distances.
For fear of the turbine of High Rotation Speed and static volute, produce friction.So its amount (being the size in gap 7) is and the design of relevant rotor assembly, institute's self-contained bearing system and the processing technology adopting, has relation.Generally speaking, the impact in gap 7, in small-sized turbosupercharger, than large-scale significantly.The utility model is exactly for these gap 7 distances of having optimized.
By analog computation and laboratory data, decide the distance in gap 7, generally speaking, gap 7 distances are the smaller the better, but must consider the possibility that blade 5 rubs with it, and the boss height of described step ring 6 should be less than or equal to described gap 7 distances.
The processing scheme of step ring 6 comprises following several:
1, described step ring 6 can be processed to form by mach mode.
2, described step ring 6 is on volute 3 internal faces, to insert a lining to form.Described lining is fixed by screw or locating stud.
3, described step ring 6 is to be provided with a groove on described volute 3 internal faces, and described groove is embedded in a packing ring and forms.Described packing ring is fixed by groove.
Utilizing a certain volume production diesel supercharging motor is test platform, on former pressurized machine basis, according to structure of the present utility model, does back-to-back load-characteristic test respectively with former pressurized machine.In process of the test, get motor high/medium/low/four of idling rotating speed, on each rotating speed, get high/medium/low three loading point, totally 12 engine working points.
Our experiments show that, with the motor of step ring 6, than prototype, when its boss height equates with gap 7 distances, realized moment of torsion lifting for 10 in 12 operation points, specific fuel consumption reduction; Specific fuel consumption reduces by 2.5% at most.
The utility model outlet step ring is by changing the wall of volute inwall, improve turbine clearance and leak, thereby improve turbine flow dynamic response, increase the driving power of turbine to supercharger air compressor, increase air input of engine by air, thereby improve the performance of turbosupercharged engine.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. an outlet step ring, it is characterized in that, comprise: wheel member, puck components and the intermediate member that coaxially connects two parts, the volute that described wheel member comprises impeller and is assemblied in impeller outside, between described impeller and volute, be provided with gap, in described gap, be equipped with blade, on described volute internal face, offer a step ring, between described step ring and the outlet blade tip of blade, be provided with a gap, the boss height of described step ring is less than or equal to described clearance distance.
2. outlet step ring according to claim 1, is characterized in that, described step ring is to be processed to form on volute internal face.
3. outlet step ring according to claim 1, is characterized in that, described step ring is on volute internal face, to insert a lining to form.
4. outlet step ring according to claim 1, is characterized in that, described step ring is to be provided with a groove on described volute internal face, and described groove is embedded in a packing ring and forms.
5. outlet step ring according to claim 3, is characterized in that, described lining is fixed by screw or locating stud.
6. outlet step ring according to claim 4, is characterized in that, described packing ring is fixed by groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671397.8U CN203584474U (en) | 2013-10-29 | 2013-10-29 | Outlet step ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671397.8U CN203584474U (en) | 2013-10-29 | 2013-10-29 | Outlet step ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203584474U true CN203584474U (en) | 2014-05-07 |
Family
ID=50582410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320671397.8U Expired - Fee Related CN203584474U (en) | 2013-10-29 | 2013-10-29 | Outlet step ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203584474U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511002A (en) * | 2013-10-29 | 2014-01-15 | 汉美综合科技（常州）有限公司 | Outlet step ring |
-
2013
- 2013-10-29 CN CN201320671397.8U patent/CN203584474U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511002A (en) * | 2013-10-29 | 2014-01-15 | 汉美综合科技（常州）有限公司 | Outlet step ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20201029 |