CN210135015U - EGR (exhaust gas Recirculation) mixer - Google Patents
EGR (exhaust gas Recirculation) mixer Download PDFInfo
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- CN210135015U CN210135015U CN201921011791.2U CN201921011791U CN210135015U CN 210135015 U CN210135015 U CN 210135015U CN 201921011791 U CN201921011791 U CN 201921011791U CN 210135015 U CN210135015 U CN 210135015U
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Abstract
The application discloses EGR blender, including the afterbody subassembly, the afterbody subassembly includes: a tail housing having a flow aperture; and the rotating blade is rotatably connected in the circulating hole of the tail shell. When the mixed gas enters the EGR mixer, the rotating blades rotate along with the flow velocity of the mixed gas in a matching mode, particularly high-speed airflow, the obstruction to the high-speed airflow is reduced, and the mixing effect is improved.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to EGR blender.
Background
EGR (Exhaust Gas Recirculation, which is called as Chinese meaning for short) is to reintroduce Exhaust Gas exhausted by an engine into an air inlet pipe to mix with fresh Gas and then enter a combustion chamber for combustion, so that the NOx emission of the engine can be effectively reduced. An EGR mixer is a device for mixing exhaust gases from an engine with fresh air.
The tail structure of the existing EGR mixer is a fixed blade structure, and the air flow is mixed only through the tail structure of the EGR mixer through which the air flow flows. When the engine runs, if the excess air coefficient is high, the EGR waste gas flow is large, the flow speed is high, and when the EGR waste gas passes through the tail structure of the EGR mixer, the obvious obstruction effect is generated on the air flow, so that the air flow disorder is aggravated, and the mixing effect is poor.
In summary, how to solve the problem that the tail structure of the EGR mixer obstructs high-speed airflow and the mixing effect is poor becomes a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides an EGR mixer to reduce the obstruction to the high-speed airflow and improve the mixing effect.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an EGR mixer comprising an aft assembly, the aft assembly comprising:
a tail housing having a flow aperture;
and the rotating blade is rotatably connected in the circulating hole of the tail shell.
Preferably, in the above EGR mixer, the tail assembly further includes a power component and a transmission component, the power component is fixed to the tail housing, the power component is in transmission connection with the rotating blade through the transmission component, and the power component drives the rotating blade to rotate according to intake parameters and engine operating conditions.
Preferably, in the above EGR mixer, the rotor blade is a shaftless rotor blade.
Preferably, in the above EGR mixer, the transmission part includes:
the outer gear ring is rotatably arranged in the gear chamber of the tail shell, and the rotating blades are fixed in the inner ring of the outer gear ring;
the driving gear is connected with the output end of the power component and meshed with the outer gear ring;
and the supporting gear is rotatably arranged in the gear chamber and is meshed with the outer gear ring.
Preferably, in the EGR mixer, the outer gear ring is a bevel gear ring, the driving gear and the support gear are both bevel gears, and a small diameter end of each bevel gear faces an airflow intake direction.
Preferably, in the EGR mixer described above, the support gear is provided in plurality, and the support gear and the drive gear are uniformly distributed along a circumference of the outer ring gear.
Preferably, in the above EGR mixer, the rotary vane has a rotary shaft, and the rotary shaft is drivingly connected to the power member through the transmission member.
Preferably, in the above EGR mixer, the power unit is an infinitely variable speed motor.
Preferably, in the above EGR mixer, a baffle plate is provided on a circumferential side of the rotor blade, the baffle plate having an axial dimension larger than an axial dimension of the rotor blade.
Preferably, in the EGR mixer described above, a flow guide structure is provided at a front portion of the rear housing located at the rotor blade.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a afterbody subassembly of EGR blender includes afterbody casing and rotating vane, and rotating vane rotates to be connected in the opening of afterbody casing. Therefore, when the mixed gas enters the EGR mixer, the rotating blades rotate along with the flow velocity of the mixed gas, particularly high-speed gas flow, the obstruction to the high-speed gas flow is reduced, and the mixing effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic front view of a tail assembly of an EGR mixer according to an embodiment of the present invention;
FIG. 2 is a side view of the tail assembly of FIG. 1;
FIG. 3 is a perspective view of the tail assembly of FIG. 1;
FIG. 4 is a schematic view of the internal transmission components of the tail assembly of FIG. 1;
FIG. 5 is a structural schematic view in axial cross-section of the tail assembly of FIG. 1;
fig. 6 is an exploded view of the tail assembly of fig. 1.
Wherein, 1 is the tail casing, 11 is the casing main part, 12 is the flange end, 13 is the gear room, 2 is rotor blade, 21 is the baffle, 3 is the power part, 4 is the drive disk assembly, 41 is the driving gear, 42 is the outer ring gear, 43 is the supporting gear.
Detailed Description
The core of the utility model is to provide an EGR blender, reduced the hindrance to high velocity air, improved mixed effect.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an EGR mixer, including a tail assembly, where the tail assembly includes a tail housing 1 and a rotor blade 2, and the tail housing 1 has a through hole; the rotor blade 2 is rotatably connected to the flow hole of the rear housing 1.
When the mixed gas gets into the EGR blender, the mixed gas through flowing through the hole when rotating vane 2, rotating vane 2 rotates along with the velocity of flow cooperation of mixed gas, compares with current fixed blade, has reduced the hindrance to the air current, especially has reduced the hindrance to high-speed air current, has improved mixed effect.
As shown in fig. 2-6, further, in this embodiment, the tail assembly further includes a power member 3 and a transmission member 4, the power member 3 is fixed to the tail housing 1, the power member 3 is in transmission connection with the rotor blade 2 through the transmission member 4, and the power member 3 drives the rotor blade 2 to rotate according to the intake parameters and the engine operating conditions. The air intake parameters are pressure and flow of the mixed gas, and the working condition of the engine is engine speed and torque.
The power component 3 actively drives the rotating blades 2 to rotate according to air inlet parameters and engine working conditions, so that the functions of circulating and mixing mixed gas and providing auxiliary pressurization can be better matched.
The specific working process and principle are as follows: when the engine recycles exhaust gas, a supercharger is also used, the conventional supercharger is difficult to consider the working conditions of low-speed large torque and high-speed high load of the engine due to the limitation of an impeller structure, and the engine model which cannot meet the requirements of low-speed large torque is exemplified. When the engine operates under the working condition of low speed and large torque, the supercharger is difficult to provide enough air inflow and air inflow pressure of the engine, a sensor in the EGR mixer measures the pressure value of the existing mixed gas and feeds the pressure value back to the controller, the controller calculates the existing poor air inflow pressure, the power part 3 is controlled to drive the rotating blades 2 to rotate according to the pressure difference, the optimal mixing of the mixed gas and the auxiliary supercharging effect on the mixed gas are realized by controlling the rotating speed of the rotating blades 2, and the air inflow pressure under the current working condition of the engine are met. Therefore, the supplementary supercharging of the supercharger can be realized, and the full-rotating-speed operation of the engine type is well supplemented.
When the engine runs under a high-speed working condition, the self air inlet pressure and the air inlet amount provided by the supercharger are enough, the controller detects that the pressure value of the mixed air is larger than or equal to the required air inlet pressure value, the controller controls the power part 3 to adjust the rotating speed of the rotating blade 2, so that the rotating speed of the rotating blade 2 is controlled in a range which is not supercharged and blocked, the EGR mixer only plays a role in stirring the air flow, the mixed flow does not flow and the optimized mixing effect is remarkably improved.
The control logic for the EGR mixer is as follows: the controller is used as a calibration condition according to the relation between the preset engine working condition and the intake pressure and the intake flow, under the condition that the engine working condition is determined, whether the supercharging pressure and the intake flow of the supercharger meet the requirements of the engine working condition or not is judged, if not, the rotating speed of the rotating blade 2 is adjusted according to the pressure difference and the intake flow speed control power part 3, the effects of supercharging mixed flow and non-flow blocking are achieved, and if yes, the rotating speed of the rotating blade 2 is adjusted according to the intake flow speed control power part 3, and the effect of pure non-flow blocking is achieved. If the power of the power component 3 is found to be overloaded in the running process, the engine is decelerated and alarmed, and the power component 3 is protected from being overloaded. When conditions change and pressure needs to change when the mixed auxiliary boost is started, the closed-loop control logic can guide the EGR mixer to further optimize the auxiliary boost mixture.
Further, in this embodiment, the rotor blade 2 is a shaftless rotor blade, and the flow area of the mixed gas is increased by the shaftless rotor blade, so that better circulation can be ensured, and vibration is reduced.
Specifically, for the driving of the shaftless rotary blades, the present embodiment provides a transmission member 4 including an outer ring gear 42, a drive gear 41, and a support gear 43; wherein, the outer gear ring 42 is rotatably arranged in the gear chamber 13 of the tail shell 1, and the rotating blades 2 are fixed in the inner ring of the outer gear ring 42; the driving gear 41 is connected with the output end of the power part 3, and the driving gear 41 is positioned in the gear chamber 13 and meshed with the outer gear ring 42; a support gear 43 is rotatably provided in the gear chamber 13, and the support gear 43 is engaged with the outer ring gear 42 for rotatably supporting the outer ring gear 42.
So set up, power unit 3 drives driving gear 41 and rotates, and driving gear 41 drives outer ring gear 42 and rotates, because rotor blade 2 is fixed in outer ring gear 42's inner circle, consequently, drives rotor blade 2 and rotates together, has realized that power unit 3 drive shaftless rotor blade rotates. The power output of the power unit 3 varies, and the rotational speed at which the rotor blades 2 are driven varies.
Further, in the present embodiment, the external gear ring 42 is a bevel gear ring, the driving gear 41 and the supporting gear 43 are both bevel gears, and the small diameter end of the bevel gear ring faces the airflow intake direction. Certain axial limiting acting force is provided through the matching of the bevel gear ring and the bevel gear, and the reliable meshing transmission of the outer gear ring 42, the driving gear 41 and the supporting gear 43 is ensured. Of course, a spur gear can be adopted, and the limit is performed through other axial limit structures.
In order to improve the rotational stability of the outer ring gear 42, in the present embodiment, the supporting gear 43 is plural, and the supporting gear 43 and the driving gear 41 are uniformly distributed along the circumference of the outer ring gear 42. Preferably, the number of the support gears 43 in this embodiment is two, and is arranged on the circumference of the outer ring gear 42 in an equilateral triangle with the drive gear 41. Of course, the number of the support gears 43 may also be one, three, four, etc. more.
Instead of using shaftless rotor blades, the rotor blades 2 can also have a rotor shaft which is in driving connection with the power element 3 via a transmission element 4. Accordingly, the transmission member 4 is preferably a gear set. Compared with the shaftless rotating blade, the flow area of the shafted rotating blade is relatively reduced, and the flow effect is not as good as that of the shaftless rotating blade.
In this embodiment, the speed change process of the rotor blade 2 may require that the rotation speed is not an integer, therefore, the power unit 3 preferably adopts an inorganic speed-variable motor, and a stepless speed-variable motor is used to ensure more accurate and reasonable pressurization and mixing.
As shown in fig. 5, in the present embodiment, the baffle 21 is provided on the circumferential side of the rotor blade 2, the baffle 21 has a ring shape, the axial dimension of the baffle 21 is larger than the axial dimension of the rotor blade 2, and the baffle 21 covers the rotor blade 2 to reduce the outflow of the air flow from the circumferential side of the rotor blade 2. Meanwhile, as the part of the rotating blade 2 axially extends out of the tail shell 1 to enter into another adjacent flange connecting piece, the assembly and operation reliability is improved through the installation and the matching of the baffle 21 and the flange connecting piece.
Further, in the present embodiment, a flow guiding structure is provided at the front of the tail housing 1 at the rotor blade 2. Because the front part airflow of the rotating blade 2 is more turbulent and the mixing effect is worse, a better mixing effect is ensured by arranging a flow guide structure, the flow guide mode can be diversified, for example, the flow guide structure extends along the axial direction of the flow through hole and is arranged on a guide block on the inner wall, and the inner wall of the flow through hole is circumferentially provided with a plurality of guide blocks.
In this embodiment, the rear housing 1 includes a housing body 11 and a flange end 12, the housing body 11 has a flow hole, the flange end 12 is provided with a gear chamber 13, and the rotor blade 2 and the transmission member 4 are both provided in the flange end 12, and are conveniently connected to other components of the EGR mixer through the flange end 12. Preferably, a sealing ring or a gasket is provided at a position where the flange end 12 is connected to other components, to improve sealing performance.
In order to improve the operational reliability of the transmission member 4, the gear chamber 13 is filled with grease to reduce vibration and friction and to improve the service life.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An EGR mixer comprising an aft assembly, wherein the aft assembly comprises:
a tail housing having a flow aperture;
and the rotating blade is rotatably connected in the circulating hole of the tail shell.
2. The EGR mixer of claim 1, wherein the tail assembly further comprises a power member and a transmission member, the power member is fixed with the tail housing, the power member is in transmission connection with the rotating blade through the transmission member, and the power member drives the rotating blade to rotate according to intake parameters and engine operating conditions.
3. The EGR mixer of claim 2 wherein the turning vanes are shaftless turning vanes.
4. The EGR mixer of claim 3, wherein the transmission component comprises:
the outer gear ring is rotatably arranged in the gear chamber of the tail shell, and the rotating blades are fixed in the inner ring of the outer gear ring;
the driving gear is connected with the output end of the power component and meshed with the outer gear ring;
and the supporting gear is rotatably arranged in the gear chamber and is meshed with the outer gear ring.
5. The EGR mixer of claim 4, wherein the outer gear ring is a bevel gear ring, the driving gear and the support gear are bevel gears, and the small diameter ends of the bevel gears face the air intake direction.
6. The EGR mixer of claim 4, wherein the support gear is plural and the support gear and the drive gear are evenly distributed along a circumference of the outer ring gear.
7. The EGR mixer of claim 2 wherein the turning vanes have a turning shaft drivingly connected to the power component through the transmission component.
8. The EGR mixer of any of claims 2-7, wherein the power component is an infinitely variable speed motor.
9. The EGR mixer of any of claims 1-7, wherein a circumferential side of the turning vanes is provided with a baffle plate having an axial dimension larger than an axial dimension of the turning vanes.
10. The EGR mixer of any of claims 1-7 wherein a flow directing structure is provided forward of the turning vanes of the aft housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921011791.2U CN210135015U (en) | 2019-06-28 | 2019-06-28 | EGR (exhaust gas Recirculation) mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921011791.2U CN210135015U (en) | 2019-06-28 | 2019-06-28 | EGR (exhaust gas Recirculation) mixer |
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| Publication Number | Publication Date |
|---|---|
| CN210135015U true CN210135015U (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921011791.2U Active CN210135015U (en) | 2019-06-28 | 2019-06-28 | EGR (exhaust gas Recirculation) mixer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425059A (en) * | 2019-06-28 | 2019-11-08 | 潍柴动力股份有限公司 | A kind of EGR mixer |
| US11480139B1 (en) | 2021-09-14 | 2022-10-25 | Ford Global Technologies, Llc | Exhaust gas recovery system with high-pressure mixer |
-
2019
- 2019-06-28 CN CN201921011791.2U patent/CN210135015U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425059A (en) * | 2019-06-28 | 2019-11-08 | 潍柴动力股份有限公司 | A kind of EGR mixer |
| CN110425059B (en) * | 2019-06-28 | 2024-08-16 | 潍柴动力股份有限公司 | EGR (exhaust gas recirculation) mixer |
| US11480139B1 (en) | 2021-09-14 | 2022-10-25 | Ford Global Technologies, Llc | Exhaust gas recovery system with high-pressure mixer |
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