CN212202293U - EGR (exhaust gas Recirculation) one-way valve and flow guide structure thereof - Google Patents
EGR (exhaust gas Recirculation) one-way valve and flow guide structure thereof Download PDFInfo
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- CN212202293U CN212202293U CN202020596492.6U CN202020596492U CN212202293U CN 212202293 U CN212202293 U CN 212202293U CN 202020596492 U CN202020596492 U CN 202020596492U CN 212202293 U CN212202293 U CN 212202293U
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Abstract
The utility model discloses a EGR check valve and water conservancy diversion structure thereof, the water conservancy diversion structure includes vertical flow distribution plate and transverse flow guide plate, two subdivisions of bilateral symmetry are separated into with EGR cooler's cooler export inboard to vertical flow distribution plate, every subdivision inboard all is provided with a transverse flow guide plate, transverse flow guide plate's the inner meets and the outer end extends to the terminal surface that the cooler exported with the cooler core, two independent runners about every subdivision is separated into by transverse flow guide plate, four independent runners correspond one-to-one with EGR check valve's four check valve passageways, and four independent runners's gas flow equals. This scheme is separated into four independent runners that gas flow equals through vertical flow distribution plate and transverse guide plate with the export of EGR cooler to the gas flow that makes every check valve passageway of entering EGR check valve equals, consequently can avoid the flow uneven, the too big one-way valve piece abnormal damage problem that causes of air current impact, has improved the operational reliability of check valve.
Description
Technical Field
The utility model relates to a EGR check valve technical field especially relates to an EGR check valve and water conservancy diversion structure thereof.
Background
EGR (Exhaust Gas Recycle) technology is widely applied to an intake and exhaust system of an internal combustion engine, and an EGR one-way valve is used for enabling EGR Gas to pass in a one-way mode. The EGR one-way valve is a valve plate type one-way valve, and the working principle is as follows: EGR gas enters the inlet of the one-way valve and pushes away the valve plate, so that the EGR gas passes through the one-way valve; when EGR gas flows reversely, the valve sheet is pushed to fall, the one-way valve passage is blocked, and the air flow cannot pass reversely.
The EGR cooler is used for cooling EGR gas, reducing the temperature of the EGR gas and improving the EGR rate. The EGR gas passes through the core tube of the EGR cooler, and cooling water flows outside the tube and absorbs the heat of the EGR gas at the same time, so that the temperature of the EGR gas is reduced. The exit linkage EGR check valve's of EGR cooler entry, divide into about being two with EGR cooler's core pipe usually among the prior art, and EGR cooler's export inboard is equipped with vertical baffle one, with the air current about two parts, simultaneously, the EGR check valve is provided with four passageways, and four passageways divide into about two sets ofly with EGR cooler export about two parts air current corresponds, and every group includes two upper and lower passageways. When the EGR cooler works, left EGR gas flow flowing out of the outlet of the EGR cooler enters the left upper channel and the left lower channel of the EGR one-way valve, right EGR gas flow flowing out of the outlet of the EGR cooler enters the right upper channel and the right lower channel of the EGR one-way valve,
because the upper part and the lower part of the outlet section of the EGR cooler are usually asymmetric, the airflow direction and the flow resistance of the upper part and the lower part of each side of the airflow are different, so that the airflow passing through the upper channel and the lower channel of each side of the EGR one-way valve is inevitably uneven, and for the one-way valve channel with larger airflow, the valve plate has large opening degree and larger airflow impact, and the faults such as valve plate fracture and the like are more easily caused.
Therefore, how to avoid the problem of abnormal damage of the valve plate of the one-way valve caused by uneven flow and overlarge airflow impact is a technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a water conservancy diversion structure of EGR check valve, this water conservancy diversion structure can make the gas flow through each check valve passageway equal, avoids the flow uneven, the too big one-way valve piece abnormal damage problem that causes of air current impact, has improved the operational reliability of check valve. Another object of the utility model is to provide an EGR check valve including above-mentioned water conservancy diversion structure.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a water conservancy diversion structure of EGR check valve, includes vertical flow distribution plate and transverse flow guide plate, vertical flow distribution plate sets up in the cooler export of EGR cooler inboard and will two subdivisions of bilateral symmetry are separated into to the inboard of cooler export, every the subdivision inboard all is provided with one transverse flow guide plate, transverse flow guide plate's the inner meets with the cooler core and the outer end extends to the terminal surface of cooler export, every transverse flow guide plate is with its place two upper and lower independent runners, four independent runner and EGR check valve's four check valve passageways one-to-one, and four independent runner's gas flow equals.
Preferably, above-mentioned water conservancy diversion structure is still including being located the cooler export with water conservancy diversion cushion between the import of EGR check valve, water conservancy diversion cushion be equipped with four independent and with four the air current opening of check valve passageway one-to-one, every the inner circle of air current opening is equipped with the throttle structure, the throttle structure orientation one side of independent runner is the leading-in face of air current, the throttle structure orientation one side of check valve passageway is air current sudden change face, the leading-in face of air current forms the gradually reduced mouth structure along the air current direction, the air current sudden change face forms the flaring structure of amplifying gradually along the air current direction, just the leading-in face of air current with the contained angle of the axis of air current opening is less than the air current sudden change face with the contained angle of the axis of air current opening.
Preferably, the air flow abrupt surface is perpendicular to an axis of the air flow port.
The utility model provides a water conservancy diversion structure of EGR check valve, including vertical flow distribution plate and transverse flow guide plate, vertical flow distribution plate sets up in the cooler export of EGR cooler inboard and separates into bilateral symmetry's two divisions with the inboard of cooler export, every division inboard all is provided with a transverse flow guide plate, transverse flow guide plate's the inner meets with the cooler core and the outer end extends to the terminal surface that the cooler exported, two independent runners about every transverse flow guide plate separates into its division at place, four independent runners and EGR check valve passageway one-to-one of check valve, and the gas flow of four independent runners equals. This scheme is separated into four independent runners that gas flow equals through vertical flow distribution plate and transverse guide plate with the export of EGR cooler to the gas flow that makes every check valve passageway of entering EGR check valve equals, consequently can avoid the flow uneven, the too big one-way valve piece abnormal damage problem that causes of air current impact, has improved the operational reliability of check valve.
The utility model also provides an EGR check valve including above-mentioned water conservancy diversion structure. The derivation process of the beneficial effect of the EGR check valve is substantially similar to the derivation process of the beneficial effect brought by the diversion structure, and therefore, the description is omitted here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic longitudinal sectional view of a flow guide structure according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a transverse baffle according to an embodiment of the present invention;
fig. 3 is a schematic view of a diversion cushion block according to an embodiment of the present invention;
fig. 4 is a schematic longitudinal sectional view of a deflector block according to an embodiment of the present invention.
The EGR cooler comprises a 1-EGR cooler, a 2-vertical flow distribution plate, a 3-transverse flow guide plate, a 4-flow guide cushion block, a 5-EGR one-way valve, an 11-upper side independent flow passage, a 12-lower side independent flow passage, a 13-cooler core body, a 14-flow guide plate dividing line, a 41-air flow port, a 42-throttling structure, a 43-air flow leading-in surface, a 44-air flow abrupt change surface and a 51-one-way valve channel.
Detailed Description
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 to 4, fig. 1 is a schematic longitudinal sectional view of a flow guide structure according to an embodiment of the present invention; fig. 2 is a schematic structural view of a transverse baffle according to an embodiment of the present invention; fig. 3 is a schematic view of a diversion cushion block according to an embodiment of the present invention; fig. 4 is a schematic longitudinal sectional view of a deflector block according to an embodiment of the present invention.
In order to overcome the above-mentioned defect among the prior art, the utility model provides a water conservancy diversion structure of EGR check valve, including vertical flow distribution plate 2 and transverse flow guide plate 3, vertical flow distribution plate 2 sets up in the cooler export of EGR cooler 1 inboard and separates into two subdivisions of bilateral symmetry with the inboard of cooler export, every subdivision inboard all is provided with a transverse flow guide plate 3, transverse flow guide plate 3's the inner meets and the terminal surface that the outer end extends to the cooler export with cooler core 13, two independent runners about every transverse flow guide plate 3 separates into its subdivision at place, four independent runners and four check valve passageways 51 one-to-one of EGR check valve 5 (as the shown position corresponding relation of hollow white arrow in fig. 2), and the gas flow of four independent runners equals.
Referring to fig. 1, the position of the baffle dividing line 14 in fig. 1 represents the position where the connection between the inner end of the transverse baffle 3 and the outlet end of the cooler core 13 extends along the axial direction of the cooler core 13, the position of the baffle dividing line 14 can be determined according to the flow channel resistance of the downstream flow channel, each part is divided into an upper independent flow channel 11 and a lower independent flow channel 12 by the transverse baffle 3, the outlet end face of the cooler core 13 corresponding to the part is divided into an upper core end face and a lower core end face corresponding to the upper independent flow channel and the lower independent flow channel by the baffle dividing line 14, and the core end face corresponding to the lower independent flow channel 12 with the smaller flow channel resistance in the upper independent flow channel 11 and the lower independent flow channel is smaller than the.
As shown in fig. 1, the outlet of the cooler is in an up-down asymmetric structure, each part is divided into an upper independent flow channel 11 and a lower independent flow channel 12 by a transverse flow guide plate 3, the airflow flowing out from the upper independent flow channel 11 is over against a one-way valve channel 51, and the flow channel is short and has small flow channel resistance, so that a small proportion of gas needs to be distributed; the independent flow channel 12 on the lower side has large airflow direction change, long flow channel and large flow channel resistance, so a large proportion of gas needs to be distributed. Therefore, the baffle split line 14 is offset upward by a distance with respect to the position of the upper and lower midpoints of the outlet ends of the cooler core 13, that is, the area of the upper core end face into which the baffle split line 14 is split is smaller than the area of the lower core end face. In addition, the specific proportion of the upper and lower core end faces to the outlet end face of the cooler core 13 can be obtained by simulation calculation, for example, in the structure shown in fig. 1, the present scheme can first divide the outlet end face of the cooler core 13 corresponding to the sub-portions according to the ratio of 3: 5, that is, 3/8 of the gas occupied sub-portion distributed by the upper independent flow passage 11 and 5/8 of the gas occupied sub-portion distributed by the lower independent flow passage 12, then perform simulation calculation, and if the requirement of equal flow rate of the upper and lower independent flow passages is not met, adjust the distribution ratio until a satisfactory result is obtained.
It should be noted that the inner end of the transverse baffle 3 is connected to the outlet end of the cooler core 13, and the outer end of the transverse baffle 3 corresponds to the downstream partition between the upper and lower check valve passages 51, as shown in fig. 1. The upper surface and the lower surface of the transverse guide plate 3 form smooth transition surfaces at the inner sides of the independent flow channels, so that the gas flow loss is reduced.
This scheme is separated into four independent runners that gas flow equals through vertical flow distribution plate 2 and horizontal guide plate 3 with the export of EGR cooler 1, through the rational design of guide plate cut-off line position to the gas flow that makes 5 every check valve passageways 51 of EGR check valve is equal, consequently can avoid the flow uneven, the air current strikes the unusual damage problem of the check valve piece that too big caused, has improved the operational reliability of check valve. The position of the baffle dividing line 14 is determined through simulation calculation and verified through experiments.
Referring to fig. 3 and 4, preferably, the flow guiding structure further includes a flow guiding cushion block 4 located between the outlet of the cooler and the inlet of the EGR check valve 5, the flow guiding cushion block 4 is provided with four independent air flow ports 41 corresponding to the four check valve passages 51 one by one, an inner ring of each air flow port 41 is provided with a throttling structure 42, one side of the throttling structure 42 facing the independent flow passage is an air flow introducing surface 43, one side of the throttling structure 42 facing the check valve passage 51 is an air flow abrupt surface 44, the air flow introducing surface 43 forms a tapered opening structure gradually decreasing along the air flow direction, the air flow abrupt surface 44 forms a flared structure gradually increasing along the air flow direction, and an included angle between the air flow introducing surface 43 and an axis of the air flow port 41 (as shown by a dotted line in fig. 4) is smaller than an included angle between the air flow abrupt surface 44 and the axis of the. Adopt throttle structure 42 in this scheme to design every air current opening 41 for the throttle opening structure of the throat form that reduces the back suddenly along the air current direction gradually, can reduce the gas pulse energy, reduce the impact force of air current to the check valve piece to improve check valve operational reliability.
Preferably, the air flow discontinuities 44 are perpendicular to the axis of the air flow ports 41. The arrangement is that the gradually-flaring structure formed by the gas flow abrupt surface 44 forms a structure with an abruptly-increased cross section along the gas flow direction, so that the gas flow can reduce the gas pulse energy to a greater extent in the gradually-flaring structure with an abruptly-increased cross section after passing through the tapered opening formed by the gas flow introduction surface 43.
The utility model also provides an EGR check valve including above-mentioned water conservancy diversion structure. The derivation process of the beneficial effect of the EGR check valve is substantially similar to the derivation process of the beneficial effect brought by the diversion structure, and therefore, the description is omitted here.
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 (4)
1. The utility model provides a water conservancy diversion structure of EGR check valve, its characterized in that, includes vertical flow distribution plate (2) and horizontal guide plate (3), vertical flow distribution plate (2) set up in the cooler export of EGR cooler (1) inboard and will two subdivisions of bilateral symmetry are separated into to the inboard of cooler export, every the subdivision inboard all is provided with one horizontal guide plate (3), the inner and cooler core (13) of horizontal guide plate (3) meet and the outer end extends to the terminal surface of cooler export, every horizontal guide plate (3) are with its place two upper and lower independent runners are separated into to the subdivision, four independent runner and four check valve passageway (51) one-to-one of EGR check valve (5), and four the gas flow of independent runner is equal.
2. The flow guiding structure according to claim 1, further comprising a flow guiding cushion block (4) located between the outlet of the cooler and the inlet of the EGR check valve (5), wherein the flow guiding cushion block (4) is provided with four independent air flow ports (41) corresponding to the four check valve passages (51) one by one, an inner ring of each air flow port (41) is provided with a throttling structure (42), one side of the throttling structure (42) facing the independent flow passage is an air flow introducing surface (43), one side of the throttling structure (42) facing the check valve passages (51) is an air flow mutating surface (44), the air flow introducing surface (43) forms a gradually shrinking opening structure gradually shrinking along the air flow direction, the air flow mutating surface (44) forms a gradually enlarging structure along the air flow direction, and an included angle between the air flow introducing surface (43) and the axis of the air flow ports (41) is smaller than the air flow mutating surface (44) and the air flow mutating surface (44) The angle of the axis of the flow opening (41).
3. Flow directing structure according to claim 2, characterized in that the air flow discontinuities (44) are perpendicular to the axis of the air flow openings (41).
4. An EGR check valve characterized by comprising the flow guide structure according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596492.6U CN212202293U (en) | 2020-04-20 | 2020-04-20 | EGR (exhaust gas Recirculation) one-way valve and flow guide structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020596492.6U CN212202293U (en) | 2020-04-20 | 2020-04-20 | EGR (exhaust gas Recirculation) one-way valve and flow guide structure thereof |
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| Publication Number | Publication Date |
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| CN212202293U true CN212202293U (en) | 2020-12-22 |
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| CN202020596492.6U Active CN212202293U (en) | 2020-04-20 | 2020-04-20 | EGR (exhaust gas Recirculation) one-way valve and flow guide structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163353A (en) * | 2022-06-24 | 2022-10-11 | 摩丁普信热能技术（江苏）有限公司 | EGR exhaust gas recirculation cooler |
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2020
- 2020-04-20 CN CN202020596492.6U patent/CN212202293U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115163353A (en) * | 2022-06-24 | 2022-10-11 | 摩丁普信热能技术（江苏）有限公司 | EGR exhaust gas recirculation cooler |
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