CN106988935B - A kind of cooling pressurization integrated apparatus of EGR exhaust purification - Google Patents
A kind of cooling pressurization integrated apparatus of EGR exhaust purification Download PDFInfo
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- CN106988935B CN106988935B CN201611145708.1A CN201611145708A CN106988935B CN 106988935 B CN106988935 B CN 106988935B CN 201611145708 A CN201611145708 A CN 201611145708A CN 106988935 B CN106988935 B CN 106988935B
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Abstract
The invention discloses a kind of EGR exhausts to purify cooling pressurization integrated apparatus, including the electrostatic precipitation unit being mounted on bottom plate, the centrifugal dust-removing presser unit being set to above electrostatic precipitation unit and successively it is socketed in cooling unit and shell outside centrifugal dust-removing presser unit, bottom plate is equipped with the air inlet of EGR exhaust, and shell is equipped with gas outlet.Compared with prior art, the beneficial effects of the present invention are: structure of the invention is novel in design, the purifying and dedusting of EGR exhaust, cooling and pressurization function are integrated into a device, the effect that purifying and dedusting, cooling and pressurization are carried out to EGR exhaust can be achieved at the same time, it can effectively improve EGR exhaust pollution caused by piping and engine, gaseous mixture air inflow and EGR exhaust amount can be improved in the cooling of EGR exhaust simultaneously, may also be combined with and meets the needs of current low-temperature burning middle and high load working condition is to big EGR rate to the pressurization function of EGR exhaust.
Description
Technical field
The invention belongs to engine inlet and outlet control system field, it is mainly used for controlling automobile, non-rice habitats engine again
Cycle gas is related to a kind of cooling pressurization integrated apparatus of EGR exhaust purification.
Background technique
Gas recirculation system, for reducing in-cylinder combustion temperature, reduces NOx emission in engine art, and improvement is started
The emission performance of machine.
Through investigating, existing EGR (exhaust gas recycling) cooling system uses in machine and the outer two kinds of incorporation ways of machine, draws in machine
Enter mode and exhaust gas being introduced directly into from exhaust valve is realized using the timing adjustment of variable valve actuator for air, does not do any place to exhaust gas
Reason.It introduces outside machine and separately sets EGR pipe system and EGR valve introduces exhaust gas into air inlet pipe, according to exhaust gas from the leading point difference of exhaust pipe
Point high pressure EGR mode and low pressure EGR mode, generally set before EGR valve or after valve dedicated cooler to EGR exhaust cooled down with
Air inlet mixture temperature is reduced, but does not also set special purification device generally.
Existing engine EGR introduces scheme and does not generally carry out purified treatment to exhaust gas, and the exhaust gas with particulate matter enters
It is easy to form bigger granular material discharged in cylinder, also it is very easy to supercharger air compressor blade, air inlet piping and in-cylinder combustion
Room pollutes；Meanwhile there are big EGR rate demands for existing low-temperature burning technical approach, but the degree of plenum at present is more next
Under higher requirement, traditional is introduced directly into exhaust gas mode since exhaust gas pressure is lower, can no longer meet big EGR rate requirement；
Furthermore the EGR high-temp waste gas introduced in cylinder need to individually add cooler and be cooled down, and cooler is mostly shell and tube cooler, useless
It is readily formed dirty stifled, corrosion and leakage phenomenon under the action of gas pollutant, and has that cleaning is difficult, volume is larger and dismounting
The disadvantages of inconvenient.
Summary of the invention
Problem to be solved of the present invention be introduced for existing engine EGR scheme dirty stifled, corrosion easy to form and
Leakage phenomenon, and there is the deficiency that cleaning is difficult, volume is larger and dismounting is inconvenient, and provide it is a kind of can simultaneously purifying and dedusting,
Cooling and pressurization, and it is compact-sized, clean the cooling pressurization integrated apparatus of EGR exhaust purification simple, convenient for disassembly and assembly.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of cooling pressurization integrated apparatus of EGR exhaust purification, including be mounted on bottom plate electrostatic precipitation unit, setting
Centrifugal dust-removing presser unit above electrostatic precipitation unit and the cooling unit being successively socketed in outside centrifugal dust-removing presser unit
And shell, bottom plate are equipped with the air inlet of EGR exhaust, shell is equipped with gas outlet；Electrostatic precipitation unit is equipped with air flue, air flue
One end is connected to air inlet, is equipped with electrostatic needle in air flue, electrostatic needle connect with high voltage power supply, is equipped on bottom plate with air flue corresponding section
The end of bottom plate dust collecting trough, bottom plate dust collecting trough is equipped with dust-exhausting port；Centrifugal dust-removing presser unit includes that motor and hollow screw rod turn
Son, the output shaft of motor are set up on the shell downward, and the upper end of screw rotor is mounted on the output shaft of motor, screw rotor
Inner cavity is communicated with the other end of the air flue of electrostatic precipitation unit, and the wall of screw rotor is equipped with the centrifugal channel radially penetrated through, spiral shell
It is socketed with cooling unit outside bar rotor, cooling unit includes water inlet, cooler and water outlet, between screw rotor and cooler
Centrifugal chamber is formed, the bottom of centrifugal chamber is equipped with centrifugal slot, and centrifugal slot and subsection setup are in bottom plate and electrostatic precipitation list
Water ash leakage path in member communicates, and shell is socketed in the outside of cooler, and the gas outlet on shell is connected to centrifugal chamber.
It is equipped with EGR concentration sensor at air inlet, temperature/pressure sensor is equipped at gas outlet, water inlet is equipped with cold
But Water flow adjusting valve is equipped with static switching, the exit of dust-exhausting port and water ash leakage path between electrostatic needle and high voltage power supply
Equipped with solenoid valve；EGR concentration sensor and temperature/pressure sensor will test to signal feed back to electronic control unit
ECU, according to the intelligentized control method for setting each electric control gear of instruction realization in ECU；
When work, ECU issues control instruction, and closure static switching and starting motor, electrostatic precipitation unit are started to work,
The pressure signal that ECU is fed back according to the concentration signal and temperature/pressure sensor of EGR concentration sensor feedback compares preset
Concentration value and pressure value adjust the revolving speed of motor, so that the concentration of air inlet EGR and pressure is reached default by changing centrifugal force size
Duty requirements；
Meanwhile the temperature signal of EGR exhaust is fed back to ECU by temperature/pressure sensor, ECU is default according to corresponding operating condition
Nominal data control cooling water flow regulating valve aperture, and then control the flow of cooling water to adjust the temperature of EGR exhaust
Degree；
ECU controls solenoid valve conduction progress water ash and releases, can also pass through electromagnetism according to EGR runing time preset in it
Artificial deashing, solenoid valve act hand push button on valve every time at any time, and the EGR device runing time in ECU is measured again.
The water ash leakage path and dust-exhausting port collect at one by device inner flow passage, and pass through solenoid valve control water
The emptying of the dust and moisture of grey leakage path and dust-exhausting port, the solenoid valve are two position four-way solenoid valves.
Twist, the radial outer end of spiral air flue is the air inlet being connected to air inlet to the air flue of electrostatic precipitation unit
End, the center-side of spiral air flue is the outlet side communicated with inner cavity, and the shape of electrostatic needle is adapted with the shape of air flue.
Screw rotor is tapered, and small end is upward.
The quantity of centrifugal channel is at least 2, is circumferentially evenly arranged on the wall of screw rotor, the central axis and spiral shell of centrifugal channel
The central axis of bar rotor is in 60 ° of angle arrangements.
Cooler is tapered, and upward, thereon along upper collecting ring is equipped with, upper collecting ring communicates small end with water inlet, and lower edge is set
There is lower collecting ring, lower collecting ring is communicated with water outlet, and the outer wall of cooler is equipped with pair for being connected to upper collecting ring and lower collecting ring
The cooling water helical duct of spiral, the inner wall of cooler are equipped with the reticulate pattern protrusion of staggered helical, and the section of reticulate pattern protrusion is half
Circle, maximum height 1.5mm.
The spiral trend of the cooling water helical duct of cooler is with the direction of rotation of screw rotor on the contrary, the rotation of screw rotor
Turn direction and its spiral trend is consistent.
The high-pressure electrostatic applied on electrostatic needle is 3000V.
It is less than or equal to 5 ° when the device is installed for vertical installation, the device axis and vertical line angle.
Compared with prior art, the beneficial effects of the present invention are:
Structure of the invention is novel in design, and the purifying and dedusting of EGR exhaust, cooling and pressurization function are integrated into a device
In, the effect for carrying out purifying and dedusting, cooling and pressurization to EGR exhaust can be achieved at the same time, can effectively improve EGR exhaust to piping
And polluted caused by engine, while gaseous mixture air inflow and EGR exhaust amount can be improved in the cooling of EGR exhaust, it may also be combined with pair
The pressurization function of EGR exhaust meets the needs of current low-temperature burning middle and high load working condition is to big EGR rate.
Detailed advantage is as follows:
(1) purified EGR exhaust: the particulate matter in separation removal EGR exhaust reduces carbon soot particles substance in air inlet pipe
Be inner product combinate form at pollution, meanwhile, also can effectively avoid these particulate matters from entering in cylinder and gather with unburned particulate matter
Bigger particulate matter is generated, influence of the exhaust gas pm emission to engine in-cylinder combustion and discharge is minimized.
(2) cooling EGR exhaust: EGR exhaust is effectively cooled down, the water vapour controlled in EGR exhaust will not be because of mistake
Cold and condense, the liquid hammer caused by booster damages when avoiding introducing EGR exhaust before booster.
(3) EGR exhaust pressurizes: carrying out pressure pressurization to the EGR exhaust quoted from exhaust pipe, it is made to meet low-temperature burning operating condition
Demand to big EGR rate can adapt to various operating conditions using low pressure EGR loop, and not only high pressure exhaust gas can do work, and can also be promoted
The transient response of low pressure EGR.
(4) integrate electric control gear: above-mentioned three kinds of functions are integrated in the lesser equipment of volume, and external for water ash
Solenoid valve, cooling water flow regulating valve and the static switching released are realized intelligent with the ECU centralized control of engine.
(5) compact-sized, installation space is saved, convenient for disassembly and assembly, cleaning is simple and cost is relatively low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the cooling pressurization integrated apparatus of EGR exhaust purification of the invention；
Fig. 2 is the electric-control system schematic diagram of the present apparatus；
Fig. 3 is the structural schematic diagram of bottom plate；
Fig. 4 is the bottom substance schematic diagram of electrostatic precipitation unit；
Fig. 5 is the top structure schematic diagram of electrostatic precipitation unit；
Fig. 6 is the structural schematic diagram of screw rotor；
Fig. 7 is the structural schematic diagram of cooler；
Fig. 8 is electrostatic absorption principle figure.
Wherein, 1- air inlet, 2- bottom plate, 3- electrostatic needle, 4- air flue, 5- electrostatic precipitation unit, 6- bolt, the inner cavity 7-, 8-
Screw rotor, 9- centrifugal channel, 10- centrifugal chamber, 11- cooler, 12- cooling water helical duct, 13- cooler water inlet,
The gas outlet 14-, 15- shell, 16- shell water inlet, the upper collecting ring of 17-, collecting ring under 18-, 19- shell water outlet, 20- electricity
Machine, 21- bracket, 22- fastening nut, 23- bearing cap, 38- water ring through-hole, 39- reticulate pattern protrusion, 40- water ash leakage path, 41-
Bottom plate dust collecting trough, 42- dust-exhausting port, 43- centrifugal slot, 44- cooling water flow regulating valve, 45, go out water one-way valve, 46- high pressure
Power supply, 47- static switching, 48- solenoid valve, 49-ECU, 51- temperature/pressure sensor.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, a kind of cooling pressurization integrated apparatus of EGR exhaust purification, including installing electrostatic on a base plate 2
Dust removing units 5, the centrifugal dust-removing presser unit for being set to the top of electrostatic precipitation unit 5 and to be successively socketed in centrifugal dust-removing pressurization single
Cooling unit and shell 15 outside member, bottom plate 2 are equipped with the air inlet 1 of EGR exhaust, and shell 15 is equipped with gas outlet 14；Electrostatic
Dust removing units are equipped with air flue 4, and one end of air flue 4 is connected to air inlet 1, is equipped with electrostatic needle 3, electrostatic needle 3 and high voltage power supply in air flue 4
46 connections, as shown in figure 3, being equipped with bottom plate dust collecting trough 41 with 4 corresponding section of air flue on bottom plate 2, the end of bottom plate dust collecting trough 41 is set
There is dust-exhausting port 42；Centrifugal dust-removing presser unit includes motor 20 and hollow screw rotor 8, and the output shaft of motor 20 is set up downward
On shell 15, the upper end of screw rotor 8 is mounted on the output shaft of motor 20, the inner cavity 7 of screw rotor 8 and electrostatic precipitation
The other end of the air flue 4 of unit communicates, and the wall of screw rotor 8 is equipped with the centrifugal channel 9 radially penetrated through, 8 housing of screw rotor
It is connected to cooling unit, cooling unit includes water inlet, cooler 11 and water outlet, is formed between screw rotor 8 and cooler 11
Centrifugal chamber 10, the bottom of centrifugal chamber 10 are equipped with centrifugal slot 43, centrifugal slot 43 and subsection setup and remove in bottom plate 2 and electrostatic
Water ash leakage path 40 on dirt unit communicates, and shell 15 is socketed in the outside of cooler 11, the gas outlet 14 on shell 15 with
Centrifugal chamber 10 is connected to.
As shown in Fig. 2, being equipped with EGR concentration sensor at air inlet 1, temperature/pressure sensor 51 is equipped at gas outlet 14,
Water inlet is equipped with cooling water flow regulating valve 44, and static switching 47, dust-exhausting port 42 are equipped between electrostatic needle 3 and high voltage power supply 46
Solenoid valve 48 is equipped with the exit of water ash leakage path 40；EGR concentration sensor and temperature/pressure sensor 51 will test
To signal feed back to electronic control unit.
ECU49, according to the intelligentized control method for setting each electric control gear of instruction realization in ECU49；
When work, ECU49 issues control instruction, and closure static switching 47 and starting motor 20, electrostatic precipitation unit start
Work, the pressure signal that ECU49 is fed back according to the concentration signal and temperature/pressure sensor 51 of EGR concentration sensor feedback,
Compare preset concentration value and pressure value, adjust the revolving speed of motor 20, by change centrifugal force size make air inlet EGR concentration and
Pressure reaches default duty requirements；
Meanwhile the temperature signal of EGR exhaust is fed back to ECU49 by temperature/pressure sensor 51, ECU49 is according to corresponding work
The aperture of the preset nominal data control cooling water flow regulating valve 44 of condition, and then it is useless to adjust EGR to control the flow of cooling water
The temperature of gas；
ECU49 controls the conducting progress water ash of solenoid valve 48 and releases according to EGR device runing time preset in it, can also
By the hand push button on solenoid valve 48, artificial deashing, solenoid valve 48 act every time at any time, when the EGR device in ECU49 is run
Between measure again.
The water ash leakage path 40 collects at one with dust-exhausting port 42 by device inner flow passage, and passes through solenoid valve 48
Dust and the moisture emptying of water ash leakage path 40 and dust-exhausting port 42 are controlled, the solenoid valve 48 is two position four-way solenoid valves.
As shown in Figures 4 and 5, the air flue 4 of electrostatic precipitation unit twist, the radial outer end of spiral air flue 4 be with
The inlet end that air inlet 1 is connected to, the center-side of spiral air flue 4 is the outlet side communicated with inner cavity 7, the shape of electrostatic needle 3
It is adapted with the shape of air flue 4.
As shown in fig. 6, screw rotor 8 is tapered, small end is upward.
The quantity of centrifugal channel 9 is at least 2, is circumferentially evenly arranged on the wall of screw rotor 8, the central axis of centrifugal channel 9
It is arranged with the central axis of screw rotor 8 in 60 ° of angles.
As shown in fig. 7, cooler 11 is tapered, small end upward, thereon along being equipped with upper collecting ring 17, upper collecting ring 17 with into
The mouth of a river communicates, and lower edge is equipped with lower collecting ring 18, and lower collecting ring 18 is communicated with water outlet, and the outer wall of cooler 11 is equipped in connection
The inner wall of the cooling water helical duct 12 of the double helix of collecting ring 17 and lower collecting ring 18, cooler 11 is equipped with staggered helical
Reticulate pattern protrusion 39, the section of reticulate pattern protrusion 39 are semicircle, maximum height 1.5mm；Heat exchange area increases compared with flat interior surface
30% or so, it can effectively improve the heat transfer effect of bullet cooler 11 under the premise of not influencing trafficability performance.
The spiral trend of the cooling water helical duct 12 of cooler 11 and the direction of rotation of screw rotor 8 are on the contrary, screw rod turns
The direction of rotation of son 8 and its spiral trend are consistent.
The high-pressure electrostatic applied on electrostatic needle 3 is 3000V.
It is less than or equal to 5 ° when the device is installed for vertical installation, the device axis and vertical line angle；In favor of centrifuge separation
Effect, while being conducive to the collection of dust and moisture.
It is connected between shell 15 and electrostatic precipitation unit 5 by least two bolts 6.
When engine operates normally unlatching EGR introducing mode, EGR exhaust enters in electrostatic precipitation unit 5 after air inlet 1
Air flue 4, the electrostatic needle 3 in air flue 4 connects high voltage power supply 46, and there is insulation material in the junction of electrostatic needle 3 and electrostatic precipitation unit 5
Material isolation.
When engine operates normally and needs using EGR device, ECU49 controls static switching 47 and is connected, by engine
The 3000V high-pressure electrostatic that the high voltage power supply 46 that upper included generator 20 and potential device serve as attracts is applied on electrostatic needle 3,
Electrostatic needle 3 generates electrostatic field in air flue 4, as shown in figure 8, since diesel exhaust particulates generally have 1-5 electricity substantially
Lotus, positive and negative charge particle number is of substantially equal, and therefore, EGR exhaust gas is by high-voltage electrostatic field caused by electrostatic needle 3 in air flue 4
When, electrostatic field generates absorption or coacervation, particle to particle and can be adsorbed on electrostatic needle 3 or deposit and collect the bottom of at downwards
In bottom plate dust collecting trough 41 on plate 2,41 end of bottom plate dust collecting trough is provided with dust-exhausting port 42, passes through the electricity in device external pipeline
The emptying of dust accumulation can be achieved in the opening and closing of magnet valve 48.
The high-speed rotating screw rod driven by motor 20 is upwardly into from 4 center of air flue by the EGR exhaust of electrostatic precipitation
The inner cavity 7 of rotor 8, motor 20 are fixed on the bracket 21 on shell 15, and the junction of motor 20 and shell 15 is equipped with bearing cap
23, screw rotor 8 is connect with the output shaft of motor 20 by fastening nut 22, in 8 high-speed rotation of screw rotor, exhaust gas warp
Cross uniformly distributed centrifugal channel 9 on screw rotor 8 and enter centrifugal chamber 10, into centrifugal chamber 10 EGR exhaust screw rotor 8 height
Under speed driving in centrifugal chamber 10 high speed rotation, the particle matter not being removed yet after electrostatic separation in EGR exhaust from
Larger centrifugal force is generated in the chambers of the heart 10 in high-speed rotation to spread to 10 periphery of centrifugal chamber, and the inner wall phase with cooler 11
Collision, particle can be rebounded downwards by shock barrier or collect in 5 upper surface of electrostatic precipitation unit downwards along 11 inner wall of cooler
Centrifugal slot 43 in, and the water ash leakage path 40 and solenoid valve 48 laid on electrostatic precipitation unit 5 discharge dress can be passed through
Set the effect outer, particle barrier is collected when 39 design of reticulate pattern protrusion of 11 inner wall of cooler can be effectively improved centrifugal dust-removing.
Cooler 11 is corroded using the acid resistance of 1.5mm thickness and there is the material of Thermal conductivity to form, such as titanium alloy
Material, is the cooling water helical duct 12 of double helix on the outside of cooler 11, and cooling water is from the shell water inlet on crust of the device 15
16 enter runner at the top of 15 body of shell, and enter the upper of 11 upper end of cooler by the cooler water inlet 13 of 11 upper end of cooler
Collecting ring 17, cooling water are distributed to the cooling water helical duct 12 of double helix from upper collecting ring 17 and are flowed to subinverse airflow direction
Into lower collecting ring 18, water ring through-hole 38, the shell water outlet on water ring through-hole 38 and shell 15 are offered on lower collecting ring 18
19 connections, cooling water are discharged by shell water outlet 19, are equipped with water one-way valve 45 at shell water outlet 19.
Air flow passage is formed between 11 inner wall of cooler and screw rotor 8, exhaust gas can be in the height of screw rotor 8
Speed is upward along 11 inner wall surface helix of cooler under driving and sufficiently exchanges heat with cooling water, realizes effective cooling of EGR exhaust.Simultaneously
11 wall surface of cooler that steam contained by EGR exhaust encounters low temperature can generate condensation on wall surface and along 11 inner wall of cooler
Collected in centrifugal slot 43 downwards, can be by 40 discharger of water ash leakage path on 5 top of electrostatic precipitation unit outside,
This design can effectively avoid existing cooler 11 difficult problem of condensate discharge in EGR exhaust supercooling, while can also keep away
Exempt from EGR bleed before booster it is aqueous when the liquid hit phenomenon caused by eddy pressurizer blade, have apparent advantage.
While EGR exhaust cooling and centrifugal dust-removing, due to the high-speed driving of screw rotor 8, the pressure meeting of EGR exhaust
It gradually rises, to realize that big EGR rate provides item for the pressure pressurization under engine middle and high load working condition by EGR exhaust
Part can adjust pressure and the combination of EGR exhaust according to actual condition demand by the revolving speed of ECU49 real-time control motor 20
External EGR valve adjusts the size of EGR rate, while being equally beneficial for the centrifugation point of particle in EGR exhaust using higher revolving speed
From effect.
Fig. 2 is present apparatus electric-control system schematic diagram, and when engine normal operation is needed using device, ECU49 control is quiet
The closure of electric switch 47 and motor 20 start, electrostatic precipitation cell operation.Simultaneously according to the EGR concentration sensor of air inlet 1, go out
Temperature/pressure sensor 51 and calibration demand on 14 external pipeline of port adjust 20 revolving speed of motor, so that EGR exhaust be made to reach
To pressure needed for default operating condition, while air inlet EGR concentration reaches calibration demand.Temperature/pressure sensor 51 can be by EGR exhaust temperature
Degree signal feeds back to ECU49, and ECU49 is opened according to the preset nominal data control cooling water flow regulating valve 44 of corresponding operating condition
It spends and then controls the flow of cooling water in-out apparatus to adjust EGR exhaust temperature.
The water ash leakage path 40 and dust-exhausting port 42 of 2 lower part of bottom plate design connect external environment by two position four-way solenoid valves,
According to the EGR device runing time of ECU49 storage inside, such as every 10h, controls the conducting progress water ash of solenoid valve 48 and releases,
Can be by the artificial deashing at any time of the hand push button on solenoid valve 48, the every movement of solenoid valve 48 is primary, the EGR device fortune in ECU49
The row time measures again, and timing deashing designs the maintenance period that can extend device.
When dismantling cleaning, multiple bolts 6, fastening nut 22 and the bearing cap 23 in apparatus body need to be only removed, it is cold
But outside the extensible device of device 11, the method removal of dilute sulfuric acid solution immersion is can be used in inner wall surface thereof dust stratification incrustation, is safeguarded easy to clean
Fast.
The present invention is become one the purification of EGR exhaust, pressurization and cooling three kinds of functions by rationally designing, and is sufficiently had
The realization of effect respectively function while, can effectively reduce device size, it is easy to operate, be easily installed.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of cooling pressurization integrated apparatus of EGR exhaust purification, it is characterised in that: including the electrostatic precipitation being mounted on bottom plate
It unit, the centrifugal dust-removing presser unit being set to above electrostatic precipitation unit and is successively socketed in outside centrifugal dust-removing presser unit
Cooling unit and shell, bottom plate are equipped with the air inlet of EGR exhaust, and shell is equipped with gas outlet；Electrostatic precipitation unit is equipped with gas
Road, one end of air flue are connected to air inlet, are equipped with electrostatic needle in air flue, and electrostatic needle is connect with high voltage power supply, on bottom plate with air flue phase
Corresponding position is equipped with bottom plate dust collecting trough, and the end of bottom plate dust collecting trough is equipped with dust-exhausting port；Centrifugal dust-removing presser unit includes motor in
Empty screw rotor, the output shaft of motor are set up on the shell downward, and the upper end of screw rotor is mounted on the output shaft of motor,
The inner cavity of screw rotor is communicated with the other end of the air flue of electrostatic precipitation unit, the wall of screw rotor be equipped with radially penetrate through from
Heart channel, is socketed with cooling unit outside screw rotor, and cooling unit includes water inlet, cooler and water outlet, screw rotor with
Form centrifugal chamber between cooler, the bottom of centrifugal chamber be equipped with centrifugal slot, centrifugal slot and subsection setup in bottom plate and
Water ash leakage path on electrostatic precipitation unit communicates, and shell is socketed in the outside of cooler, gas outlet and centrifugation on shell
Chamber connection.
2. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: set at air inlet
There is EGR concentration sensor, temperature/pressure sensor is equipped at gas outlet, water inlet is equipped with cooling water flow regulating valve, electrostatic
Static switching is equipped between needle and high voltage power supply, the exit of dust-exhausting port and water ash leakage path is equipped with solenoid valve；EGR concentration passes
Sensor and temperature/pressure sensor will test to signal feed back to electronic control unit ECU, according to setting in ECU, instruction is real
The now intelligentized control method of each electric control gear；
When work, ECU issues control instruction, and closure static switching and starting motor, electrostatic precipitation unit are started to work, ECU root
According to the pressure signal that the concentration signal and temperature/pressure sensor of EGR concentration sensor feedback are fed back, preset concentration value is compareed
And pressure value, the revolving speed of motor is adjusted, so that the concentration of air inlet EGR and pressure is reached default operating condition by change centrifugal force size needs
It asks；
Meanwhile the temperature signal of EGR exhaust is fed back to ECU by temperature/pressure sensor, ECU is according to the preset mark of corresponding operating condition
Fixed number controls the flow of cooling water according to the aperture for controlling cooling water flow regulating valve to adjust the temperature of EGR exhaust；
ECU controls solenoid valve conduction progress water ash and releases according to EGR runing time preset in it, or by solenoid valve
Hand push button artificial deashing, solenoid valve act every time at any time, the EGR runing time in ECU is measured again.
3. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 2, it is characterised in that: the water ash is let out
It puts channel and dust-exhausting port to collect at one by the cooling pressurization integrated apparatus inner flow passage of EGR exhaust purification, and passes through electromagnetism
Valve controls dust and the moisture emptying of water ash leakage path and dust-exhausting port, and the solenoid valve is two position four-way solenoid valves.
4. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: electrostatic precipitation list
Twist, the radial outer end of spiral air flue is the inlet end being connected to air inlet to the air flue of member, spiral air flue
Center-side is the outlet side communicated with inner cavity, and the shape of electrostatic needle is adapted with the shape of air flue.
5. the cooling pressurization integrated apparatus of EGR exhaust according to claim 1 purification, it is characterised in that: screw rotor is in
Taper, small end is upward.
6. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: centrifugal channel
Quantity is at least 2, is circumferentially evenly arranged on the wall of screw rotor, and the central axis of centrifugal channel and the central axis of screw rotor are in
60 ° of angle arrangements.
7. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: cooler is in cone
Shape, upward, thereon along upper collecting ring is equipped with, upper collecting ring communicates small end with water inlet, and lower edge is equipped with lower collecting ring, lower collecting ring
It is communicated with water outlet, the cooling water spiral that the outer wall of cooler is equipped with the double helix of the upper collecting ring of connection and lower collecting ring is logical
Road, the inner wall of cooler are equipped with the reticulate pattern protrusion of staggered helical, and the section of reticulate pattern protrusion is semicircle, and maximum height is
1.5mm。
8. the cooling pressurization integrated apparatus of EGR exhaust according to claim 7 purification, it is characterised in that: cooler it is cold
But the spiral trend of water helical duct is with the direction of rotation of screw rotor on the contrary, the direction of rotation of screw rotor and its spiral are moved towards
Unanimously.
9. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: applied on electrostatic needle
The high-pressure electrostatic added is 3000V.
10. the cooling pressurization integrated apparatus of EGR exhaust purification according to claim 1, it is characterised in that: device installation
When for vertical installation, the device axis and vertical line angle be less than or equal to 5 °.
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| CN108188397B (en) * | 2017-11-01 | 2019-11-12 | 陕西聚高增材智造科技发展有限公司 | A kind of indoor localized hyperthermia's guard system of selective laser fusing forming |
| CN110206641B (en) * | 2019-04-29 | 2021-04-02 | 天津大学 | Compression ignition engine and method for realizing low-temperature combustion mode thereof |
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