CN116447002A - Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine - Google Patents

Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine Download PDF

Info

Publication number
CN116447002A
CN116447002A CN202210022473.6A CN202210022473A CN116447002A CN 116447002 A CN116447002 A CN 116447002A CN 202210022473 A CN202210022473 A CN 202210022473A CN 116447002 A CN116447002 A CN 116447002A
Authority
CN
China
Prior art keywords
egr
supercharger
blade
exhaust
turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210022473.6A
Other languages
Chinese (zh)
Inventor
谢正海
陈如彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAIC Motor Corp Ltd
Original Assignee
SAIC Motor Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SAIC Motor Corp Ltd filed Critical SAIC Motor Corp Ltd
Priority to CN202210022473.6A priority Critical patent/CN116447002A/en
Publication of CN116447002A publication Critical patent/CN116447002A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

The invention provides a compound supercharger integrating an EGR pump and an air inlet and exhaust system of a supercharged engine, the compound supercharger comprises a turbine and a compressor assembly, the compressor assembly comprises a wheel shaft driven by the turbine and an impeller arranged on the wheel shaft, the impeller comprises a disc-shaped wheel core, a first surface of the wheel core is provided with a main blade, the other surface of the wheel core opposite to the first surface is provided with a secondary blade, the main blade and the secondary blade are respectively positioned in two working cavities which are not communicated with each other, and one working cavity is used for connecting an exhaust gas circulation pipeline. The compound supercharger provided by the invention can improve the arrangement freedom degree of an EGR system of a supercharged engine, expand the operable rotating speed and load range of the engine of the EGR, and is beneficial to improving the power and fuel economy of the engine.

Description

Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine
Technical Field
The invention relates to the technical field of engines, in particular to a composite supercharger integrated with an EGR pump and an air intake and exhaust system of a supercharged engine.
Background
EGR (Exhaust Gas Recirculation) exhaust gas recirculation is a technique of introducing engine high-temperature combustion exhaust gas mixed with intake air into a cylinder for re-combustion, which can control in-cylinder combustion temperature and reduce NOx emission, and improve fuel economy, and has been widely used in modern engines.
At present, the EGR system mainly comprises two modes of high-pressure EGR and low-pressure EGR: introducing exhaust gas from upstream of the turbine on the exhaust line to downstream of the throttle valve on the intake line, which is commonly referred to as high-pressure EGR; exhaust gas is introduced from the downstream of the turbine on the exhaust line to the upstream of the compressor on the intake line, mixed with air and then fed into the compressor, which is commonly referred to as low pressure EGR. In high-pressure EGR, the pressure difference between the exhaust manifold and the intake manifold is the motive force for pushing the EGR, and when the pressure difference is large, a high EGR flow rate, that is, an EGR rate is high, but when the pressure difference is small or negative (low-speed low-load application), EGR gas is difficult to be introduced into the intake manifold. In low-pressure EGR, exhaust gas passes through a compressor, and because of the suction effect of the compressor, the low-pressure EGR has a wider working range (higher EGR rate can be obtained even in low-speed and low-load occasions), but harmful components in the exhaust gas pollute and corrode an intercooler, a throttle valve and pipeline accessories to a certain extent, so that the use reliability of the parts is reduced.
In summary, how to improve the layout freedom of the EGR system of the supercharged engine, and expand the operable engine speed and load range of the EGR system, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a compound supercharger integrated with an EGR pump and an air intake and exhaust system of a supercharged engine, and the compound supercharger can improve the arrangement freedom degree of the EGR system of the supercharged engine, expand the operable rotating speed and load range of the EGR engine and is beneficial to improving the power and fuel economy of the engine.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a compound supercharger integrated with an EGR pump, comprising:
a turbine;
the compressor assembly comprises a wheel shaft driven by the turbine and an impeller arranged on the wheel shaft, the impeller comprises a disc-shaped wheel core, a main blade is arranged on a first surface of the wheel core, a secondary blade is arranged on the other surface of the wheel core opposite to the first surface, the main blade and the secondary blade are respectively positioned in two working cavities which are not communicated with each other, and one working cavity is used for being connected with an exhaust gas circulation pipeline.
Optionally, in the above composite supercharger, the surface of the main blade and/or the secondary blade is provided with a corrosion-resistant and wear-resistant coating.
Optionally, in the above composite supercharger, the main blade, the secondary blade and the wheel core are of an integral structure.
Optionally, in the above composite supercharger, a circular step surface is provided on a surface where the secondary blade is located, and the step surface is located between an edge of the wheel core and the secondary blade; the inside of the shell of the compressor assembly is provided with a partition plate for separating the two working cavities, and the partition plate is provided with a sealing surface covered on the step surface.
Alternatively, in the above-described composite supercharger, the sealing surface may be provided with a planar spiral groove to form a labyrinth structure with the stepped surface for preventing gas leakage.
Optionally, in the above-described compound supercharger, the turbine is replaced by an electric motor.
An air intake and exhaust system of a supercharged engine, comprising a compound supercharger integrated with an EGR pump as disclosed in any one of the above.
Optionally, in the air intake and exhaust system of the supercharged engine, an air taking point of the exhaust gas circulation pipeline on an exhaust pipeline is located downstream of the turbine.
Optionally, in the air intake and exhaust system of the supercharged engine, a catalyst for tail gas treatment is arranged on the exhaust pipe, and the air taking point is located at the downstream of the catalyst.
Optionally, in the air intake and exhaust system of the supercharged engine, an EGR cooler and an EGR valve are arranged on the exhaust gas circulation pipeline between the air taking point and the compressor assembly, and the EGR valve is located downstream of the EGR cooler.
According to the technical scheme, the invention provides the composite supercharger integrated with the EGR pump, the impeller is arranged on the wheel shaft driven by the turbine or the motor, the impeller comprises the disc-shaped wheel core, the main blades and the secondary blades are respectively arranged on two sides of the wheel core, and as the main blades and the secondary blades are respectively positioned in two working cavities which are not communicated with each other, one working cavity can be used as the EGR pump, and the other working cavity can be used as the air compressor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an intake and exhaust system of a supercharged engine according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a compound supercharger of an integrated EGR pump provided by an embodiment of the present invention;
FIG. 3 is a schematic perspective view of the impeller 612 of FIG. 2;
fig. 4 is a cross-sectional view of F-F in fig. 2.
Marked in the figure as:
1. an engine body; 2. an intake manifold; 3. an exhaust manifold; 4. a throttle valve; 5. an intercooler; 6. a compound supercharger; 7. an EGR valve; 8. an EGR cooler; 9. a catalyst; 10. an air cleaner; v1, a first cavity; v2, a second cavity; K. a slot hole;
61. a compressor; 611. pressing the shell; 612. an impeller; 6121. a main blade; 6122. a wheel core; 61221. a step surface; 6123. secondary blades; 613. a lock nut; 614. a first partition plate; 6141. sealing surfaces; 615. a clamp;
62. an EGR pump; 621. a second partition plate; 622. a pump housing; 623. a bolt; 624. a seal ring; 625. a bolt;
63. a turbine;
64. an intermediate group; 641. an intermediate; 642. a thrust bearing; 643. a spacer sleeve; 644. a retainer ring; 645. a bearing; 646. a wheel axle; 647. piston ring.
Detailed Description
For ease of understanding, the present invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an intake and exhaust system of a supercharged engine, and a composite supercharger 6 with an EGR pump integrated therein, where the composite supercharger 6 includes a turbine 63 and a compressor 61, and is different from the conventional supercharger in that the compressor 61 is integrated with the EGR pump 62 to form a compressor assembly, and the specific structure of the composite supercharger 6 is described in fig. 2 to 4 below. Ambient air is discharged from the air cleaner 10 to remove impurities in the air, flows into the compressor 61, is compressed, is cooled by the intercooler 5 to reach a very high density, is controlled by the throttle valve 4, is led into the air inlet manifold 2 of the engine and the cylinder of the engine body 1, and exhaust gas generated by mixed combustion of air inlet and fuel in the cylinder is discharged into the turbine 63 through the exhaust manifold 3 to apply work to the supercharger, and then flows into the catalyst 9 of the aftertreatment device until the exhaust gas reaches the atmosphere. Exhaust gas may be drawn from any position of the exhaust line, such as before the turbine (at a higher temperature, not recommended), after the turbine, after the catalyst (as shown by the broken line in fig. 1), cooled by the EGR cooler 8 and adjusted in flow by the EGR valve 7, and then sucked into the EGR pump 62 and directly discharged to any position downstream of the intake manifold 2 or the compressor 61 of the intake line, which position is selected in fig. 1, for example, after the throttle valve 4, in order to ensure that the intercooler 5, the throttle valve 4, etc. are not contaminated by exhaust gas, and to ensure the reliability of use of these accessories. Due to the pumping effect of the EGR pump 62, exhaust gas may always be introduced into the intake manifold 2 under most conditions, and the engine may maintain a wide range of high EGR rate cycles.
As shown in fig. 2 to 4, an EGR pump 62 is arranged in parallel between a compressor 61 and an intermediate body group 64, the compressor 61 and the EGR pump 62 share an impeller 612 and a wheel shaft 646, which are self-forming independent working chambers and are not communicated with each other, that is, a turbine 63 is connected with the impeller 612 through the wheel shaft 646 to realize driving, the impeller 612 comprises a disc-shaped wheel core 6122, a primary blade 6121 is arranged on a first surface of the wheel core 6122, a secondary blade 6123 is arranged on the other surface opposite to the first surface, and the primary blade 6121 and the secondary blade 6123 are respectively positioned in the two working chambers which are not communicated with each other. The working chamber where the sub-vane 6123 is located is illustratively made the working chamber of the EGR pump 62 for connection to the exhaust gas circulation line.
The intermediate group 64 is an intermediate assembly connecting the compressor 61, the EGR pump 62, and the turbine 63, and fig. 2 shows only a structure of connecting the intermediate group 64 to the compressor 61 and the EGR pump 62 (since the rotating body portion is symmetrical up and down, a portion below the axis of the wheel shaft 646 is omitted). The installation connection mode is as follows: the pump housing 622 is fixedly connected to the intermediate body 641 by bolts 625, and the two are sealed by a seal 624. The second partition plate 621 is fixedly coupled and positioned to the pump case 622 by bolts 623. The first partition plate 614 is sleeved on the pump case 622 and fixed to the pump case 622 together with the press case 611 by the clip 615. Impeller 612 and spacer 643 are fixedly sleeved on wheel shaft 646 through lock nut 613, spacer 643 and the center of pump case 622 form a labyrinth shape fit, and piston ring 647 is arranged at radial clearance for sealing gas and lubricating oil between EGR pump 62 and intermediate body group 64, while thrust bearing 642 is fastened on intermediate body 641 to limit axial displacement of spacer 643, i.e. wheel shaft 646, bearing 645 is used for supporting radial load of the whole shafting, and axial displacement is limited by retainer 644 and spacer 643 to prevent disengagement. The two bearings are lubricated by the lubricating oil in the intermediate body, so that the working reliability of the bearing system of the supercharger is ensured.
Fig. 3 is a schematic view of the impeller 612 in fig. 2, and is composed of three main parts, namely a main blade 6121, a wheel core 6122 and a secondary blade 6123, wherein the main part and the secondary blade form a compressor part, and the secondary part form an EGR pump part. In view of the fact that the amount of EGR exhaust gas is far smaller than that of main air, the dimension of the designed secondary blade 6123 can be smaller than that of the primary blade 6121, a step surface 61221 is reserved on the top of the wheel core 6122 and the top of the secondary blade 6123, and the step surface 61221 is matched with a sealing surface 6141 of the first separation plate 614 in FIG. 2 to form gas seal, so that gas on two sides of the first separation plate 614 is prevented from being leaked mutually. Specifically, the surfaces of the main blade 6121 and the secondary blade 6123 may be provided with a corrosion-resistant and wear-resistant coating, for example, the corrosion-resistant and wear-resistant coating is added on the surface of the impeller 612 on the EGR pump side to resist cavitation erosion damage to the impeller by components such as water drops and solid particles in the exhaust gas, thereby improving the reliability of parts. The primary blade 6121, the secondary blade 6123, and the wheel core 6122 may be of an integral structure, for example, the impeller 612 is integrally machined from both sides of the primary blade 6121 and the secondary blade 6123 through the wheel core 6122. As shown in fig. 2, the first partition plate 614 separates two side gases, and can effectively seal the gases by designing the sealing surface 6141, wherein the sealing surface 6141 is a planar spiral ring groove (for example, a disk type mosquito repellent incense design), so that the labyrinth effect is utilized to prevent the gas leakage and ensure the sealing.
Fig. 4 is a full circumferential cross-sectional view taken through line F-F in fig. 2, as shown in fig. 4, of a middle portion of the pump housing 622 beginning at the upper wall surface of the first cavity V1, exhaust gas flow being introduced into the first cavity V1 from the outside through the inlet, through the slot K formed in the pump housing 622, and into the second cavity V2 (i.e., at the suction port of the EGR pump 62).
As shown by solid arrows in fig. 2, intake air flows in from the opening at the left end of fig. 2, passes through the flow passage formed by the main blades 6121 of the centrifugal impeller 612, the core 6122, the press shell 611, and the first partition plate 614, is compressed, and flows out of the compressor 61. As indicated by the broken-line arrows in fig. 2 and 4, EGR exhaust gas is introduced from an inlet (see fig. 4), collected in a first cavity V1 formed by a second partition plate 621 and a pump case 622, enters a second cavity V2 from a slot K opened at the bottom near the center of the first cavity V1, and then the exhaust gas in the second cavity V2 is sucked into a flow passage formed by a sub-blade 6123 of an impeller 612, a first partition plate 614, the second partition plate 621, a wheel core 6122 and the pump case 622, flows out of the EGR pump 62, and enters an intake system.
In addition, when the driving force of the compound supercharger 6 comes from the motor (i.e., the electric supercharger), the corresponding turbine portion is replaced by the motor. The compound supercharger provided by the invention has the advantages that two parallel independent working cavities of air inlet compression and waste gas suction are taken into consideration, the tightness between different working cavities is ensured, the arrangement freedom degree and the working reliability of an air inlet and exhaust system can be improved, the comprehensive power performance of an engine is improved, and the emission of harmful substances is reduced.
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 the 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. A compound supercharger integrated with an EGR pump, comprising:
a turbine;
the compressor assembly comprises a wheel shaft driven by the turbine and an impeller arranged on the wheel shaft, the impeller comprises a disc-shaped wheel core, a main blade is arranged on a first surface of the wheel core, a secondary blade is arranged on the other surface of the wheel core opposite to the first surface, the main blade and the secondary blade are respectively positioned in two working cavities which are not communicated with each other, and one working cavity is used for being connected with an exhaust gas circulation pipeline.
2. The composite supercharger of claim 1 wherein the surfaces of the primary and/or secondary vanes are provided with a corrosion and wear resistant coating.
3. The compound supercharger of claim 2 wherein the primary blade, secondary blade and wheel core are of unitary construction.
4. A composite supercharger according to any one of claims 1 to 3 wherein the face of the secondary vane is provided with a circular stepped face, the stepped face being located between the edge of the wheel core and the secondary vane; the inside of the shell of the compressor assembly is provided with a partition plate for separating the two working cavities, and the partition plate is provided with a sealing surface covered on the step surface.
5. The composite supercharger of claim 4 wherein the sealing surface is provided with planar spiral ring grooves to form a labyrinth structure with the step surface to prevent gas leakage.
6. The compound supercharger of claim 4 wherein the turbine is replaced by an electric motor.
7. An intake and exhaust system of a supercharged engine comprising a compound supercharger of any one of claims 1 to 5 incorporating an EGR pump.
8. The supercharged engine of claim 7, wherein the point of intake and exhaust of said exhaust gas recirculation line on the exhaust line is downstream of said turbine.
9. The supercharged engine intake and exhaust system of claim 8, wherein a catalyst for exhaust gas treatment is provided on said exhaust line, and said take-off point is located downstream of said catalyst.
10. A supercharged engine intake and exhaust system according to claim 8 or 9, wherein an EGR cooler and an EGR valve are provided on the exhaust gas recirculation line between the take-off point and the compressor assembly, said EGR valve being located downstream of the EGR cooler.
CN202210022473.6A 2022-01-10 2022-01-10 Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine Pending CN116447002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210022473.6A CN116447002A (en) 2022-01-10 2022-01-10 Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210022473.6A CN116447002A (en) 2022-01-10 2022-01-10 Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine

Publications (1)

Publication Number Publication Date
CN116447002A true CN116447002A (en) 2023-07-18

Family

ID=87120720

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210022473.6A Pending CN116447002A (en) 2022-01-10 2022-01-10 Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine

Country Status (1)

Country Link
CN (1) CN116447002A (en)

Similar Documents

Publication Publication Date Title
CN100402812C (en) Turbocharger system for an internal combustion engine
WO1998032964A9 (en) Exhaust gas recirculation system employing a fluidic pump
JP4028923B2 (en) Turbocharger with sliding member
US8839620B2 (en) Sliding vane rotary expander for waste heat recovery system
CN1861987A (en) Pressurizer of miniturbine with mixed flow turbine and water cooled bearing body
CN110792615A (en) Two-stage centrifugal equidirectional tandem type fuel cell air compressor with waste gas recovery device
CN101215988A (en) Mini car and motorcycle general type turbo-charger
CN104594961B (en) The compressor end of a kind of turbocharger seals structure
US8539936B2 (en) Supercharger rotor shaft seal pressure equalization
CN116447002A (en) Composite supercharger integrated with EGR pump and air intake and exhaust system of supercharged engine
CN217055298U (en) Shaft end sealing structure of turbocharger
US3090546A (en) Pressurized oil seal for rotating machinery
CN112282988A (en) Air filter of turbocharger of diesel engine
JPS5970830A (en) Turbosupercharger
US10865703B2 (en) Conduit connection assembly with pressure relief
CN114060122A (en) Engine crankcase forced ventilation system, engine and car
CN220769586U (en) High negative pressure resistant sealing structure of turbocharger compressor end
CN219081696U (en) Double-intake turbocharger and V-shaped engine
CN210530975U (en) Radial flow type exhaust gas turbocharger capable of avoiding low-load oil leakage
CN219061828U (en) Turbocharger and engine assembly
CN220850163U (en) Low-noise compressor shell with replaceable air inlet
CN214464482U (en) Crankcase ventilation system and engine
CN217440129U (en) Supercharged engine crankcase ventilation system
CN117167317A (en) Safety stop structure of marine low-speed diesel engine EGR supercharger
CN216519560U (en) Vortex end static sealing structure of axial flow supercharger of marine low-speed machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination