CN204200677U - There is the compressor impeller reducing thrust load function - Google Patents
There is the compressor impeller reducing thrust load function Download PDFInfo
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- CN204200677U CN204200677U CN201420632644.8U CN201420632644U CN204200677U CN 204200677 U CN204200677 U CN 204200677U CN 201420632644 U CN201420632644 U CN 201420632644U CN 204200677 U CN204200677 U CN 204200677U
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Abstract
A kind of have the compressor impeller reducing thrust load function, comprise wheel hub, five ~ seven linear leafs and five ~ seven 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 excircle configuration diameter at linear leaf flow outlet top and the excircle configuration diameter at short blade flow outlet top are all D2, the wheel diameter of wheel hub is D3, D3 is less than D2, the side end face at the flow outlet top of linear leaf and the flow outlet top of short blade and the wheel disc circle end face intersection of wheel hub adopt arc transition, concentrate to reduce impeller stress.The compressor impeller that the utility model provides, under the prerequisite keeping former supercharger air compressor performance, the load at the impeller wheel back side is reduced to act on by reducing hub disk area, reduce and take turns sensing impeller leading faces direction, back side load by impeller, reduce the bearing capacity of thrust bearing whirlpool end face, effectively improve the operation conditions of turbosupercharger.
Description
Technical field
The utility model relates to turbosupercharger and to calm the anger technical field, particularly a kind of turbo-charger blower impeller.
Background technique
Turbocharging technology is the energy utilizing motor combustion gas, rotarily drive turbine wheel rotation by turbine and become mechanical work, the compressor impeller coaxial with turbine wheel also runs up with same speed, after compresses fresh air, send into cylinder, improve air density and the aeration quantity of cylinder, thus improve the power of motor, improve the combustion condition of fuel oil, make fuel oil Thorough combustion, thus fuel consume is reduced, decrease the ratio of harmful substance in the waste gas entering air, and then finally realize environmental protection and energy saving, improve the effect of engine power, play the effect recovering power when motor being worked on plateau simultaneously.
Existing compressor impeller as shown in Figure 1, comprise wheel hub 1, plural pieces linear leaf 2 and plural pieces short blade 3, linear leaf 2 is the same with the quantity of short blade 3, linear leaf 2 and cross-shaped being evenly distributed on of short blade 3 are drawn together on wheel hub 1, the excircle configuration diameter of linear leaf 2 flow outlet top 2-1 and the excircle configuration diameter of short blade 3 flow outlet top 3-1 are all D2, and D2 is less than the wheel diameter D1 of wheel hub 1.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 exceeds the limit that thrust bearing can bear, turbine rotor system and thrust bearing directly contact and dry grind, under high rotating speed effect, thrust bearing very quick-wearing lost efficacy, there is burning machine in turbosupercharger.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 provide a kind of there is the compressor impeller reducing thrust load function.
The technical solution of the utility model is: a kind of have the compressor impeller reducing thrust load function, comprise wheel hub, five ~ seven linear leafs and five ~ seven 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 excircle configuration diameter at linear leaf flow outlet top and the excircle configuration diameter at short blade flow outlet top are all D2, the wheel diameter of wheel hub is D3, D3 is less than D2, the side end face at the flow outlet top of linear leaf and the flow outlet top of short blade and the wheel disc circle end face intersection of wheel hub adopt arc transition, concentrate to reduce impeller stress.
The utility model compared with prior art has following features:
1, under the prerequisite keeping former supercharger air compressor performance, the load at the impeller wheel back side is reduced to act on by reducing wheel disc area, reduce and take turns sensing impeller leading faces direction, back side load by impeller, reduce the bearing capacity of thrust bearing whirlpool end face, effectively improve the operation conditions of turbosupercharger.
2, the impeller after improving, directly can add at prophyll machine on blank of taking turns, not need die sinking again, be convenient to produce, reduce cost.
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 compressor impeller structural representation;
Accompanying drawing 2 is the A-A sectional view in accompanying drawing 1;
The compressor impeller structural representation that accompanying drawing 3 provides for the utility model;
Accompanying drawing 4 is the B-B sectional view in accompanying drawing 3.
Embodiment
A kind of have the compressor impeller reducing thrust load function, comprise wheel hub 1, seven linear leafs 2 and seven short blades 3, linear leaf 2 and cross-shaped being evenly distributed on of short blade 3 are drawn together on wheel hub 1, the excircle configuration diameter of linear leaf 2 flow outlet top 2-1 and the excircle configuration diameter of short blade 3 flow outlet top 3-1 are all D2, the wheel diameter of wheel hub 1 is D3, D3 is less than D2, the side end face of the flow outlet top 2-1 of linear leaf 2 and the flow outlet top 3-1 of short blade 3 and the wheel disc circle end face intersection of wheel hub 1 adopt circular arc 4 transition, concentrate to reduce impeller stress.
Owing to acting on the thrust load 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, 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, act on impeller wheel back surface load fall and will be greater than the amplitude acting on impeller front surface load and decline, cause taking turns the back of the body by impeller thus and point to the load reduction of impeller leading faces direction, reduce the loading force that thrust bearing bears, effectively improve the operation conditions of turbosupercharger.
Claims (1)
1. one kind has the compressor impeller reducing thrust load function, comprise wheel hub, five ~ seven linear leafs and five ~ seven 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 excircle configuration diameter at linear leaf flow outlet top and the excircle configuration diameter at short blade flow outlet top are all D2, it is characterized in that: the wheel diameter of wheel hub is D3, D3 is less than D2, the side end face at the flow outlet top of linear leaf and the flow outlet top of short blade and the wheel disc circle end face intersection of wheel hub adopt arc transition, concentrate to reduce impeller stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632644.8U CN204200677U (en) | 2014-10-29 | 2014-10-29 | There is the compressor impeller reducing thrust load function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420632644.8U CN204200677U (en) | 2014-10-29 | 2014-10-29 | There is the compressor impeller reducing thrust load function |
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| Publication Number | Publication Date |
|---|---|
| CN204200677U true CN204200677U (en) | 2015-03-11 |
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| CN201420632644.8U Active CN204200677U (en) | 2014-10-29 | 2014-10-29 | There is the compressor impeller reducing thrust load function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314863A (en) * | 2014-10-29 | 2015-01-28 | 湖南天雁机械有限责任公司 | Gas compressor impeller with function of reducing axial load |
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2014
- 2014-10-29 CN CN201420632644.8U patent/CN204200677U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314863A (en) * | 2014-10-29 | 2015-01-28 | 湖南天雁机械有限责任公司 | Gas compressor impeller with function of reducing axial load |
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