CN211550075U - Supercharger compressor impeller with air inlet front edge sweepback bending characteristic - Google Patents
Supercharger compressor impeller with air inlet front edge sweepback bending characteristic Download PDFInfo
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- CN211550075U CN211550075U CN201922426219.9U CN201922426219U CN211550075U CN 211550075 U CN211550075 U CN 211550075U CN 201922426219 U CN201922426219 U CN 201922426219U CN 211550075 U CN211550075 U CN 211550075U
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Abstract
The utility model discloses a supercharger compressor impeller with the characteristic of sweepback bending of the air inlet front edge, which comprises a hub (1); a plurality of pairs of blade sets are distributed on the periphery of the upper surface of the hub (1) at equal intervals in the circumferential direction around the vertical central axis of the hub (1); each pair of blade groups comprises a long blade (2) and a splitter blade (3) which are distributed at intervals; the top of each long blade is provided with a long blade inlet edge (21); the lower part of each long blade is provided with a long blade air outlet edge (22), the long blade air inlet edge is used as an impeller air inlet front edge, and the shape of the long blade air inlet front edge is a curve shape with a sweepback bending bow-shaped characteristic; the curve with the sweepback bending bow-shaped characteristic is specifically a circular arc curve, a Bezier curve or a spline curve. The utility model discloses can be through the crooked molding of the blade of the air inlet leading edge who improves the impeller, increase the circumference angle controllability of blade, can show the wholeness ability that improves the impeller.
Description
Technical Field
The utility model relates to a turbo charger technical field especially relates to a booster compressor impeller with crooked characteristic is swept backward to leading edge that admits air.
Background
The traditional engine produces power by means of combustion work of fuel in the cylinder, and the input fuel amount is limited by the amount of air sucked into the cylinder, so that the power produced by the engine is also limited, and the output power is increased, and the fuel amount can be increased only by compressing more air into the cylinder, so that the combustion work capacity is improved.
The turbocharger is a mechanical device which can increase the output power of the engine under the condition of unchanged working efficiency, and simultaneously, the fuel consumption rate of the engine is effectively reduced. In recent years, the engine supercharging technology is rapidly developed, and plays an important role in reducing emission, improving power, recovering plateau performance and the like.
For a turbocharger, a compressor impeller is a core component of the turbocharger, and the design of a high-pressure-ratio and high-efficiency compressor is always a pursuit target of the compressor impeller.
However, the structural design of the conventional impeller is unreasonable, and the blade profile of the conventional impeller has no variability characteristic, so that the further improvement of the performance of the impeller is limited, the efficiency of the gas compressor is limited, and the efficiency of the whole turbocharger is affected.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the technical defect that prior art exists, provide a booster compressor impeller with sweep crooked characteristic behind leading edge admits air.
Therefore, the utility model provides a supercharger compressor impeller with the characteristic of sweepback bending of the air inlet front edge, which comprises a hub;
a plurality of pairs of blade sets are distributed on the periphery of the upper surface of the hub at equal intervals in the circumferential direction around the vertical central axis of the hub;
each pair of blade groups comprises a long blade and a splitter blade which are distributed at intervals;
the long blades and the splitter blades are all blade-shaped blades;
the top of each long blade is provided with a long blade inlet edge;
the lower part of each long blade is provided with a long blade air outlet edge,
the long blade air inlet edge is used as the air inlet front edge of the impeller and is in a curve shape with a sweepback bending bow-shaped characteristic;
the curve with the sweepback bending bow-shaped characteristic is specifically a circular arc curve, a Bezier curve or a spline curve.
Wherein the enveloping angle of the curve of the sweepback bending bow-shaped characteristic is 5-10 degrees.
Wherein, the middle cambered surface of the long blade, one side edge close to the hub is a hub curve;
the middle cambered surface of the long blade, the other side edge far away from the hub is a wheel cover curve;
the wheel cover curve and the wheel hub curve are both Bezier spline curves conforming to Bezier;
the hub curve of the splitter blade and the shroud curve of the splitter blade both conform to a Bezier spline curve.
The long blade air inlet edge at the top of the long blade is gradually inclined downwards from inside to outside;
the long blade air outlet edge at the lower part of the long blade is gradually inclined upwards from inside to outside.
By the above the technical scheme provided by the utility model it is visible, compare with prior art, the utility model provides a booster compressor impeller with air inlet leading edge sweepback crooked characteristic, its structural design science increases the inside tangential nonlinear angle distribution control of blade, generates the booster compressor impeller that has inlet leading edge sweepback bow type crooked characteristic, can be through the crooked molding of the blade of the air inlet leading edge of improving the impeller, increased the circumference angle control ability of blade, can show the wholeness ability that improves the impeller, and then promote compressor and whole turbo charger's efficiency.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of a supercharger compressor impeller with a swept-back bending feature of an intake leading edge according to the present invention, the view showing a cantilever structural feature of the leading edge of the impeller;
fig. 2 is a schematic view of a partial cross-sectional structure of a supercharger compressor impeller with a sweepback bending feature of an air inlet leading edge provided by the present invention;
fig. 3 is a schematic view of the position of the air intake front edge of the impeller according to the present invention.
Fig. 4 is a schematic view of the control curve of the front edge of the impeller according to the present invention.
Fig. 5 is a schematic diagram showing the change of the inlet airflow angle of the curved impeller with the front edge of the impeller of the present invention, i.e. a comparison graph of the impeller blade profile curve corresponding to the inlet blade airflow angle, the curve being a blade profile curve constructed in the Theta-M' plane coordinate system;
FIG. 6 is a MAP graph (graph) of the design performance of a prior art impeller having an outlet diameter size of 56 mm;
fig. 7 is a MAP (graph) of the design performance boost for an impeller leading edge swept back curved impeller with an exit diameter dimension of 56mm in an exemplary embodiment of the invention.
In the figure, 1 is a hub, 2 is a long blade, 3 is a splitter blade, 4 is a wheel cover curve, and 5 is a hub curve;
21 is the inlet edge of the long blade, and 22 is the outlet edge of the long blade.
Detailed Description
In order to make the technical field of the present invention better understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 7, the present invention provides a supercharger compressor impeller with swept-back bending feature of an intake leading edge, comprising a hub 1;
a plurality of pairs of blade sets are distributed on the periphery of the upper surface of the hub 1 at equal intervals in the circumferential direction around the vertical central axis of the hub 1;
each pair of blade groups comprises a long blade 2 and a splitter blade 3 which are distributed at intervals;
the long blades 2 and the splitter blades 3 are all blade-shaped blades;
the top of each long blade 2, with a long blade leading edge 21;
the lower part of each long blade 2 is provided with a long blade gas outlet edge 22,
the long blade air inlet edge 21 is used as an air inlet front edge of the impeller and is in a curve shape with a sweepback bending bow-shaped characteristic;
the curve with the sweepback bending bow-shaped characteristic is specifically a circular arc curve, a Bezier curve or a spline curve.
The utility model discloses in, specifically realize, the envelope angle of the curve of sweepback bending bow type characteristic (be impeller air inlet leading edge curve) is 5 ~ 10 degrees.
It should be noted that, referring to fig. 2, the long-blade inlet edge 21 (i.e., the impeller inlet leading edge) forms a curve in space, the shape of the long-blade inlet edge 21 is a curve shape, and the space curve is an inlet leading edge curve Q;
fig. 4 is a plan view of one of the long blades of fig. 3. In the present invention, in the concrete implementation, as shown in fig. 4, the air intake leading edge curve of the impeller, the curve control uses a circular arc curve, a Bezier curve or a spline curve, and the envelope angle C of the curve of the sweepback bending bow-shaped feature (i.e., the air intake leading edge curve of the impeller) is 5 to 10 degrees.
The utility model discloses in, in specifically realizing, as shown in fig. 5, the utility model discloses an adopt the compressor impeller of the curved characteristic of leading edge sweepback, the blade air current beta angle of the inside streamline meridian curve of impeller blade has been changed, crooked leaf profile curve A is because crooked, compare original linear curve B's distribution leaf profile, the position has moved forward to the air current direction, blade air current beta angle (along the axial blade angle of air current promptly) increase (increase to beta 2 from beta 1), the attack angle of air current (being the contained angle of blade curve and air current direction) will diminish (become 2 from 1), the air current is when high-speed, the shock wave loss will reduce, efficiency promotes, through verifying, the compressor impeller that has the curved characteristic of leading edge sweepback, the highest efficiency of whole operating mode scope can promote 2 ~ 5%, the pressure ratio promotes 3 ~ 5%.
In fig. 5, Theta is a blade circumferential rotation angle, and M' is a blade meridian arc length-to-radius integral
And s is the meridian plane arc length of the blade.
The utility model discloses in, specifically realize, as shown in fig. 1, the utility model discloses because the crooked molding is swept backward to the blade leading edge, has changed the cantilever bending structure structural strength characteristic on impeller blade leading edge, and traditional impeller blade is compared to the impeller that sweepbacks backward to the leading edge, and the natural frequency of vibration that it has obtains improving, and the amplitude of improvement reaches 10 ~ 20%.
The utility model discloses in, specifically realize, as shown in figure 6, figure 7, to adopting the technical scheme of the utility model, the utility model discloses a concrete embodiment, the 56mm impeller that the export diameter size of making was, adopt the same meridian structure size parameter, sweepforward curved impeller, leading edge bending control curve adopts spline curve, and leading edge curve envelope angle (the bow type envelope angle that the impeller admits air the leading edge curve promptly) is 8 degrees, the utility model discloses an impeller, its impeller admit air the performance of leading edge after using admit air leading edge sweepforward curved characteristic, compare original impeller, and the promotion effect is obvious, and the compressor maximum efficiency promotes 4%, and design point pressure ratio promotes 5%. It should be noted that fig. 6 is original design impeller, and 74% of the highest efficiency, fig. 7 are the utility model relates to a curved impeller is swept backward to leading edge, and 78% of the highest efficiency, consequently, compares with prior art, the utility model discloses an impeller, the highest efficiency obtains promoting, and high-efficient regional scope enlarges, and impeller wholeness can be promoted by a wide margin.
In fig. 6 and 7, the abscissa represents the corrected air flow rate (corrected air flow) and the ordinate represents the compressor pressure ratio (compressor pressure ratio).
According to the technical scheme, it can be known, to the utility model discloses a turbocharger impeller, its compressor impeller blade profile that has, be different from traditional impeller, used a blade profile through special design and generated control method for impeller blade can generate the controllable crooked curve characteristic of rotatory tangential direction, and the blade has generated the compressor impeller that has crooked sweepback bow-shaped characteristic, and bow-shaped envelope angle is 5 ~ 10 degrees, and sweepback crooked curve adopts circular arc curve, Bezier curve or spline curve. Compared with the traditional curved-surface impeller, the air compressor impeller has better pneumatic performance.
It should be noted that, to the utility model discloses, under the condition that blade wheel hub and wheel casing design parameter confirm, increase the nonlinear angle distribution control in the inside tangential of blade, can generate the booster compressor impeller that has the crooked characteristic of the sweepback bow type of import leading edge, bow type envelope angle is 5-10 degrees, has increased the circumference angle control ability of blade, the utility model discloses a design have do not with the novel compressor impeller of traditional impeller, can show the wholeness ability that has improved the impeller, through verifying, the whole operating mode range efficiency of compressor, can promote 2 ~ 5% the highest, the point pressure ratio of design operating mode has promoted 3 ~ 5%, the self-oscillation frequency of blade has improved 10 ~ 20%.
To the utility model discloses a compressor impeller with crooked characteristic is swept backward to blade leading edge through the crooked molding of leading edge blade that admits air, has changed the blade air angle of the inside streamline meridian curve of impeller blade, compares original linear distribution blade profile, and the position has moved forward to the air current direction, and blade air current beta angle increases, and the attack angle of air current will diminish, and the air current is when high-speed, and the shock wave loss will reduce, and efficiency drops and promotes. Through verification, the efficiency of the whole working condition range of the bending characteristic air compressor can be improved by 2-5% at most. Meanwhile, due to the sweepback bending modeling of the front edge of the blade, the structural strength characteristic of a cantilever structure of the air inlet edge of the impeller blade is changed, the natural vibration frequency of the blade is improved, and the improvement amplitude reaches 10-20%.
In the utility model, in the concrete implementation, the middle cambered surface of the long blade 2, one side edge near the hub 1 is the hub curve 5;
the middle cambered surface of the long blade 2, the other side edge far away from the hub 1 is a wheel cover curve 4;
the wheel cover curve 4 and the hub curve 5 both conform to Bezier spline curves.
It should be noted that the hub curve of the splitter blade (i.e., the side edge of the splitter blade 3 close to the hub 1) and the shroud curve of the splitter blade (i.e., the other side edge of the splitter blade 3 away from the hub 1) are both in accordance with Bezier spline curves.
In the concrete implementation, the wheel cover curve 4 and the wheel hub curve 5 are respectively in shapes conforming to a high-order (3-5 orders) Bezier spline curve;
in particular, the high-order Bezier spline curve may be a quintic Bezier spline curve.
In the present invention, in particular, referring to fig. 1 and 2, the long-blade air inlet edge 21 at the top of the long blade 2 is gradually inclined downward from inside to outside (i.e. the height is higher the closer to the vertical central axis of the profile).
The long vane outlet edge 22 at the lower part of the long vane 2 is gradually inclined upwards from inside to outside (i.e. the closer to the vertical central axis of the profile, the lower the height).
It should be noted that, to the utility model discloses, the wheel hub curve of impeller accords with high-order Bezier spline curve, can the wheel hub curve of accurate control compressor impeller to and the gas flow direction of the meridian passageway of control impeller. Meanwhile, the wheel cover curve of the impeller also conforms to a high-order Bezier spline curve, so that the wheel cover curve of the compressor impeller can be accurately controlled, gas backflow is effectively prevented, the spacing size between the compressor impeller and the compressor shell is effectively controlled, gas leakage is prevented, the efficiency of the compressor is greatly improved, and the overall efficiency of the turbocharger is improved.
It should be noted that, to the utility model discloses, the structure of compressor impeller includes wheel hub, a plurality of long blade and a plurality of splitter blade, and long blade and splitter blade quantity equal, around the axis direction of compressor impeller, crisscross evenly distributed is on the wheel hub of impeller.
To sum up, compare with prior art, the utility model provides a pair of booster compressor impeller with crooked characteristic is swept backward to air inlet leading edge, its structural design science increases the inside tangential nonlinear angle distribution control of blade, generates the booster compressor impeller that has crooked characteristic is swept backward to the import leading edge, can be through the crooked molding of the blade of the air inlet leading edge of improving the impeller, the circumference angle control ability of blade has been increased, can show the wholeness ability that improves the impeller, and then promote compressor and whole turbo charger's efficiency.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A supercharger compressor impeller with a swept-back curvature of the inlet leading edge is characterized by comprising a hub (1);
a plurality of pairs of blade sets are distributed on the periphery of the upper surface of the hub (1) at equal intervals in the circumferential direction around the vertical central axis of the hub (1);
each pair of blade groups comprises a long blade (2) and a splitter blade (3) which are distributed at intervals;
the long blades (2) and the splitter blades (3) are both blade-shaped blades;
the top of each long blade (2) is provided with a long blade inlet edge (21);
the lower part of each long blade (2) is provided with a long blade gas outlet edge (22),
the long blade air inlet edge (21) is used as the air inlet front edge of the impeller and is in a curve shape with a sweepback bending bow-shaped characteristic;
the curve with the sweepback bending bow-shaped characteristic is specifically a circular arc curve, a Bezier curve or a spline curve.
2. The supercharger compressor wheel having an intake leading edge swept back bend feature of claim 1, wherein an envelope angle of a curve of the swept back bend bow feature is 5-10 degrees.
3. The supercharger compressor wheel with swept-back inlet-leading-edge curvature feature of claim 1, wherein the mean camber surface of the long blades (2), at the side edge near the hub (1), is the hub curve (5);
the middle cambered surface of the long blade (2) and the other side edge far away from the hub (1) are wheel cover curves (4);
the wheel cover curve (4) and the wheel hub curve (5) both conform to a Bezier spline curve;
the hub curve of the splitter blade and the shroud curve of the splitter blade are both in accordance with Bezier spline curves.
4. The supercharger compressor wheel with intake leading edge sweepback curvature feature according to any one of claims 1 to 3, characterized in that the long blade intake edge (21) at the top of the long blade (2) is gradually inclined downward from inside to outside;
the long blade air outlet edge (22) at the lower part of the long blade (2) is gradually inclined upwards from inside to outside.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922426219.9U CN211550075U (en) | 2019-12-30 | 2019-12-30 | Supercharger compressor impeller with air inlet front edge sweepback bending characteristic |
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| CN201922426219.9U CN211550075U (en) | 2019-12-30 | 2019-12-30 | Supercharger compressor impeller with air inlet front edge sweepback bending characteristic |
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| CN211550075U true CN211550075U (en) | 2020-09-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685370A (en) * | 2021-09-24 | 2021-11-23 | 李媛 | High negative pressure steam compressor and impeller |
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2019
- 2019-12-30 CN CN201922426219.9U patent/CN211550075U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685370A (en) * | 2021-09-24 | 2021-11-23 | 李媛 | High negative pressure steam compressor and impeller |
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