CN209228493U - Torque motor promotes EGR valve - Google Patents
Torque motor promotes EGR valve Download PDFInfo
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- CN209228493U CN209228493U CN201920008213.7U CN201920008213U CN209228493U CN 209228493 U CN209228493 U CN 209228493U CN 201920008213 U CN201920008213 U CN 201920008213U CN 209228493 U CN209228493 U CN 209228493U
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Abstract
The utility model discloses a kind of torque motors to promote EGR valve, including valve body, the center-pole being arranged in valve body, is assemblied on center-pole and upper valve core of the same size and bottom spool；The upper outside of valve body is installed with the torque motor for driving the driving plate being located in valve body to rotate, and using torque motor as power source, the rotary motion of torque motor is converted into moving along a straight line the utility model by driving plate.The movement slots being made of upper and lower track are provided in driving plate, bearing can be slided inside, when driving plate rotation, promote bearing to roll along track, and then center-pole can be driven upwardly or downwardly to move；Two spools it is in the same size, after introducing exhaust gas, upper valve core is upward by the active force of exhaust gas, the active force of exhaust gas suffered by bottom spool is downward, it is equal in magnitude due to two spools, the torque motor system friction that only needs to overcome itself in this way can overcome torque motor to drive hypodynamic defect well.
Description
Technical field
The utility model relates to a kind of electric EGR valves, belong to engine exhaust-gas recirculating system control technology field.
Background technique
Gas recirculation system (Exhaust Gas Recirculation) abbreviation EGR is to produce diesel engine or gasoline engine
The sub-fraction of raw exhaust gas sends cylinder back to again.EGR gas is due to will retarded combustion process with inertia, that is to say, that
Burning velocity will slow down, and slow down so as to cause the pressure initiation process in combustion chamber, here it is oxynitrides to reduce
Main cause.Total exhaust gas flow (massflow) can be made to reduce in addition, improving ER EGR Rate, therefore total in exhaust gas discharge
Pollutant output quantity opposite will reduce.
Appropriate engine combustion exhaust gas can be reintroduced back to air inlet pipe by electronic EGR, and hair is entered after mixing with fresh air
Motivation cylinder carries out second-time burning, so that gas in-cylinder combustion temperature is reduced, to reduce NOxGeneration and discharge amount, are typically mounted at
Between exhaust manifold and inlet manifold.It is more and more frequent to the use of EGR valve with the upgrading of six discharge course of state, and will
It is monitored it as key monitoring object, with ECU, once breaking down, just will appear ECU alarm, and can limit torsion
Speed limit leads to the reduction of client's user satisfaction, and has also carried out high request to the service life of EGR valve, especially medium and heavy to start
Machine.In national legislation, requirement especially is proposed to the EGR valve service life, brush motor used in mainstream EGR valve, no longer full before
Foot uses.But brushless motor selected by foreign countries, often BLDC motor, price at home temporarily can batch without producer
Production.So the EGR valve in order to realize the high life, selection of Motor torque motor, but torque motor torque is less than normal, and cannot
Moment amplification is carried out using gear train.
Utility model content
The technical problems to be solved in the utility model is overcome the deficiencies in the prior art and provides a kind of torque motor and promoted
EGR valve has high life and high reliability using torque motor as driving.
In order to solve the above technical problems, technical solution adopted in the utility model is:
A kind of torque motor promotion EGR valve, including valve body, the center-pole being arranged in valve body, is assemblied on center-pole and uses
In matching the upper valve core and bottom spool being sealed with top seal mouth and lower seal mouth respectively；The upper valve core and lower valve
Core it is in the same size；The upper outside of the valve body is installed with torque motor, and the drive shaft of torque motor is inserted from the side wall of valve body
Enter in the valve body above center-pole, the inner end bias of drive shaft is fixedly connected with the driving plate of cam-like；In the drive shaft
One end equipped with torsionspring, and torsionspring is inserted in driving plate；It is provided in driving plate by upper rail and lower railway group
At arc-shaped movement slots, be movably set with bearing in movement slots；Sliding block, the top of sliding block are installed at the top of the center-pole
Portion is provided with opening plate, and the bottom of driving plate is located in the opening of the plate, and bearing passes through the bullet that is through in its inner hole
Property pin is arranged on the plate of the opening two sides.
Further, the upper rail and lower railway are using the cam base circle center of driving plate as the arc-shaped rail in the center of circle
Road, and get on the right track and excessively connected with circular arc respectively with the both ends of lower railway.
Further, bottom spool seat ring is installed in the intracorporal lower seal mouth of the valve；The bottom spool seat ring interference
It is assemblied in lower seal mouth, and is uniformly arranged multiple riveting blocks between bottom spool seat ring and lower seal mouth.
Further, be installed with guide sleeve seat in the valve body, be equipped with guide sleeve in guide sleeve seat, the center-pole it is upper
Portion is inserted in guide sleeve.
Further, guiding jack is offered on the bottom face of the sliding block, and the guiding is inserted at the top of the center-pole
In jack, and center-pole axial position in guiding jack is adjustable, and there are axially adjustable spaces in guiding jack.
Further, it offers on the side of the sliding block for the hollow hole as welded rails.
Further, the top of the valve body is provided with dustproof cover, and fastening bolt is provided on dustproof cover；Valve body
Bottom is provided with blanking cover, and blanking cover elastic conjunction is evenly arranged with multiple rivetings in the bottom of valve body, and between blanking cover and valve body
Block；Water inlet pipe and outlet pipe are provided on the valve body.
Further, the upper valve core elastic conjunction is uniform at the middle part of center-pole, and between upper valve core and center-pole
Multiple riveting blocks for being secured together are provided with, are fixedly provided on the center-pole for holding the convex of upper valve core
Platform；The bottom spool elastic conjunction is in the lower end of center-pole；The bottom end of the center-pole is protruded from bottom spool, and under
The junction of spool is installed with a circle solder fillet.
Further, the notch for being flared after bottom spool assembly is offered on the bottom face of the center-pole.
Further, it is provided with lip seal in the intracorporal upper end axis hole of the valve, and the lip of lip seal is downward.
The beneficial effects of adopting the technical scheme are that
The EGR valve of the utility model, as power source, directly drives driving plate movement, the work of driving plate using torque motor
With being the linear motion that the rotary motion of torque motor is converted into center-pole.It is provided in driving plate and is made of upper and lower track
Arc-shaped movement slots, inner wall smooth and transition when driving plate rotation, promote naturally, bearing can be slided inside
Bearing is upwardly or downwardly rolled along track, and then center-pole can be driven upwardly or downwardly to move, so that EGR valve is opened
Or it closes.The utility model using etc. bivalves cored structure, upper and lower two spools it is in the same size, the work of such EGR valve when
It waits, just need to only overcome frictional force.Two spools it is in the same size, after introducing exhaust gas, effect of the upper valve core by exhaust gas
Power is upward, and the active force of exhaust gas suffered by bottom spool is downward, and equal in magnitude due to two spools, such torque motor only needs
Overcome the system friction of itself, torque motor can be overcome to drive hypodynamic defect well.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the utility model；
Fig. 2 is the cross-sectional view in another direction of the utility model；
Fig. 3 is the diagram showing the structure of the equal spools of the utility model；
Fig. 4 is the torque motor torque characteristics schematic diagram of the utility model；
Fig. 5 is the torque motor angular characteristics schematic diagram of the utility model；
Fig. 6 is the slide block structure schematic diagram of the utility model；
Fig. 7 is the air inlet navigation designing figure of the utility model；
In figure: 1, blanking cover, 2, valve body, 3, water inlet pipe, 4, guide sleeve seat, 5, guide sleeve, 6, lip seal, 7, sliding block, 8,
Nut, 9, driving plate, 10, outlet pipe, 11, upper valve core, 12, center-pole, 13, bottom spool seat ring, 14, bottom spool, 15, screw,
16, resilient key, 17, bearing, 18, dustproof cover, 19, spring, 20, spring bushing, 21, torque motor, 24, movement slots, 25, guiding
Jack, 26, adjustable space, 27, welded rails, 28, air guide port.
Specific embodiment
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
As shown in Figs. 1-2, the utility model discloses a kind of torque motors to promote EGR valve, including valve body 2, setting in valve
Center-pole 12 in body 2, be assemblied on center-pole 12 for matched respectively with top seal mouth and lower seal mouth carry out it is close
The upper valve core 11 and bottom spool 14 of envelope；Upper valve core 11 and bottom spool 14 it is in the same size；The upper outside of valve body 2 is installed with torque
Motor 21, the drive shaft of torque motor 21 is from the valve body 2 above the side wall of valve body 2 insertion center-pole 12, the inner end of drive shaft
Portion's bias is fixedly connected with the driving plate 9 of cam-like；Spring bushing 20 and spring 19 are housed in the drive shaft in valve body 2, and
One end of spring 19 is inserted in driving plate 9；The arc-shaped movement by getting on the right track and lower railway forms is provided in driving plate 9
Slot 24 is movably set with bearing 17 in movement slots 24；The top of center-pole 12 is installed with sliding block 7, and the top of sliding block 7 is provided with out
Mouth plate, the bottom of driving plate 9 is located in the opening of the plate, and bearing 17 is set by the resilient key 16 being through in its inner hole
It sets on the plate of the opening two sides.When EGR valve work, exhaust gas is acted on upper valve core 11 and bottom spool 14, due to upper valve
Core 11 and bottom spool 14 are equal in magnitude, and exhaust so is just eliminated the pressure of spool, so worked in practical EGR valve
Cheng Zhong need to only overcome frictional force.
The EGR valve of the utility model is used as power source using torque motor 21, and the driving plate 9 for directly driving cam-like, which is done, revolves
Transhipment is dynamic.The effect of driving plate 9 be the rotary motion of torque motor 21 is converted into moving along a straight line, as shown in figure 4, upper rail and
Lower railway be using the cam base circle center of driving plate 12 as the arc-shaped rail in the center of circle, and get on the right track and lower railway both ends
It is excessively connected with circular arc respectively, upper rail and lower railway constitute inside and outside penetrating and be arc-shaped movement slots 24, inner wall
Smooth and transition is naturally, bearing 17 can be slided inside, and bearing 17 is connected by sliding block 7 with center-pole 12.Work as driving
Plate 9 by torque motor 21 driving and when rotating, bearing 17 will be promoted upwardly or downwardly to roll in movement slots 24 along track
It is dynamic, and then center-pole 12 can be driven upwardly or downwardly to move, realize being turned on or off for EGR valve.Rotate down when
It waits, the upper rail of movement slots 24 is contacted with bearing 17, and promote EGR valve to be opened, when rotation then up, movement slots 24
Lower railway contacted with bearing 17, promote EGR valve carry out closing movement.Movement slots 24 are closed design, there is stop up and down, can
Prevent bearing 17 from de-orbiting.
The sliding block 7 of the utility model is the key that implement the utility model.In order to enable upper valve core 11 can be good at pasting
Tight valve body devises sliding block 7, and sliding block 7 is other than fixing bearing 17, and also and center-pole 12 is adjustable in axial position.Sliding block 7
Guiding jack 25 is offered on bottom face, the top of center-pole 12 is inserted in the guiding jack 25, and center-pole 12 is being oriented to
Axial position is adjustable in jack 25, and there are axially adjustable spaces 26 in guiding jack 25.
The torque characteristics of torque motor is specified in Fig. 4, force value is most between 10 ° -80 ° for the torque of torque motor
Greatly, so as starting point during selecting as far as possible, driving plate 9 is gone into 10 ° positions of the torque motor 21 to limit.And due in
Core bar 12 and upper valve core 11 are prepackages, and after upper valve core 11 and the contact of valve body 2, the position of center-pole 12 is also just secured, this
It requires in the axial direction, has to reserve certain adjustable space 26 to center-pole 12 in sliding block 7, as shown in Figure 1.In the middle
After core bar 12 and 16 assembled in advance of upper valve core, it is ensured that upper valve core 11 is adjacent to valve body and guarantees leakage rate, guarantees center-pole 12 again
To the distance at center, technique not can guarantee, so design has center-pole 12 adjustable on axial position in sliding block 7, work as upper valve
After core 11 is adjacent to valve body, while driving plate 9 is in the torque stabilization of torque motor 21 into limit, then welds center-pole 18 and slides
Block 13.
In Fig. 1, after nut 8 is tightened, 10 ° of position of torque motor 21 is also determined that, at this time sliding block 7 because and
Driving plate 9 is fixed, and the position of sliding block 7 is also just fixed, and the position of center-pole 12 at this time also secures, because of foozle and dress
With factors such as errors, so the position on 12 top of center-pole may be deviated, the position of sliding block 7 may also be deviated, institute
With adjustable space 26 to be had, to eliminate foozle and rigging error.After sliding block 7 and center-pole 12 assemble, then welded
It connects.
As shown in Figure 6, it offers on the side of sliding block 7 for the hollow hole as welded rails 27.When center-pole 12 is worn
After entering in sliding block 7, center-pole 12 and sliding block 7 can be welded along welded rails 27.It is this to set by largely verifying
It is strong that meter mode welds pulling force, can satisfy requirement.And sliding block 7 is oriented to jack 25, plays guiding and positioning to center-pole 12
Effect.
In order to solve the driving force of torque motor 21 compared with minor issue, the utility model key is to use equal double spools knot
Structure.Equal bivalves cored structure is made of upper valve core 11, bottom spool 14, center-pole 12 and bottom spool seat ring 13 etc..EGR valve work when
It waits, after introducing exhaust gas, upper valve core 11 is upward by the active force of exhaust gas, and the active force of exhaust gas suffered by bottom spool 14 is downward,
Equal in magnitude due to two spools 11,14, such torque motor 21 needs to overcome the system friction of itself, can be very well
Overcome torque motor 21 to drive hypodynamic defect.
In order to keep equal bivalves cored structure reliable, 11 elastic conjunction of upper valve core of the utility model at the middle part of center-pole 12,
And multiple riveting blocks for being secured together are evenly arranged between upper valve core 11 and center-pole 12, on center-pole 12
It is fixedly provided with the boss for holding upper valve core 11；14 elastic conjunction of bottom spool is in the lower end of center-pole 12；Center-pole 12
Bottom end is protruded from bottom spool 14, and is installed with a circle solder fillet with the junction of bottom spool 14.The bottom end of center-pole 12
The notch being flared after assembling for bottom spool 14 is offered on face.The upper valve core 11 of the utility model and center-pole 12 are to adopt
It is fixed together with interference plus the mode of side pressure riveting, so at work when upper valve core 11 switchs, stress is downward, on
The bottom end of spool 11 is held by boss, can effectively prevent upper valve core 11 from falling off.Bottom spool 14 and center-pole 12 are to use
It is full of what the mode then welded was fixed together, and one section of the bottom of the bottom end protrusion bottom spool 14 of center-pole 12, and two
A circle solder fillet is formed when the junction of person is welded, and can greatly be increased welding force, be acquired by a large amount of data
Analysis verifying, using the welding structure of above-mentioned protrusion, welding pulling-out force flushes welding pulling-out force than common, increases about 3 times,
Pulling-out force can reach 20000N.m.Open up notch in the bottom face of center-pole 12 simultaneously, after the completion of welding, using tool into
Row flaring, the bottom end of center-pole 12 is expanded, can further effectively prevent bottom spool 14 to fall off.
Bottom spool seat ring 13 is installed in lower seal mouth in valve body 2；13 elastic conjunction of bottom spool seat ring is close in lower part
Multiple riveting blocks are uniformly arranged in sealing, and between bottom spool seat ring 13 and lower seal mouth；Because EGR valve goes out for two up and down
The internal diameter of mouth is equal, but the internal diameter of upper valve core 11 is greater than the internal diameter of valve body 2 again, so must be designed with bottom spool seat ring 13.
In assembly, first upper valve core 11 is packed into, is then reloaded into bottom spool seat ring 13, is reloaded into bottom spool 14.Bottom spool seat ring
13 material must be same material or close to the material of the trade mark with valve body 2.If EGR valve is directly connect with exhaust pipe, it is
Guarantee exhaust gas does not go out from flange face string, valve body material is selected and is vented tube material and approach, meanwhile, flange design has air guide port
28；In order to avoid EGR valve is gone here and there out from guide sleeve, EGR valve design is shut off and seal lip structure；Meanwhile in order to adapt to heat
End installation, has cooling water channel in valve body medium design.
Lip seal 6 is provided in upper end axis hole in valve body 2, center-pole 12 is inserted in lip seal 6, and lip is close
The lip of envelope 6 is downward.The main function of lip seal 6 is seal against exhaust gas, and excess exhaust gas is prevented to be exhausted directly in air, because
The lip of the lip seal 6 is downward, and air pressure is bigger, and sealing function is more reliable.
It is installed with guide sleeve seat 4 in valve body 2, guide sleeve 5 is above housed in guide sleeve seat 4；The top of center-pole 12, which is inserted in, leads
Into set 5.The top of valve body 2 is provided with dustproof cover 18, and screw 15 is provided on dustproof cover 18；The bottom of valve body 2 is arranged
There is blanking cover 1,1 elastic conjunction of blanking cover is evenly arranged with multiple riveting blocks in the bottom of valve body 2, and between blanking cover 1 and valve body 2；
Water inlet pipe 3 and outlet pipe 10 are provided on valve body 2.
The principle of the torque motor 21 of the utility model is four permanent magnetism magnetic poles (rotor) by 4 coil (stator) magnetic
Under field interactions, rotation torque, driving rotor rotation are generated.After energization, coil generates magnetism, generates with four permanent magnetism magnetic poles
Moment loading, driving motor rotation, it is internal its not in contact with so can guarantee very long service life.Torque motor 21 it is interior
There is Hall chip in portion, and the changes of magnetic field generated by rotation can accurately know the rotation angle of drive shaft.Valve body 2 mainly rises
It connects engine and constitutes the pith of EGR valve composition, what is illustrated here is hot end EGR valve, with engine
Exhaust pipe is connected, and material selection and exhaust tube material are close, can effectively prevent deforming, and design has air guide port 28, can solve because
For expand with heat and contract with cold bring EGR valve gas leakage the phenomenon that.The failure phenomenon is more universal in hot end use, but practical new by this
Way described in type can solve the failure conditions.Valve body 2 be by lot of experiment validation, and only need to be by simply changing
Into the design that can be met the requirements.Because valve body 2 is mounted directly on exhaust pipe, lead to the flange distortion of valve body, exhaust gas can be from change
It is gone here and there out at shape, it is inaccurate to lead to discharge, and the high-temperature gas gone here and there out can melt other components, lead to a series of failure.Institute
With the material of valve body 2 in the utility model, close to the material trademark of exhaust pipe, the two coefficient of expansion in this way is identical, while valve body 2
Air inlet design air guide port design, when installation, valve body and exhaust pipe form simple labyrinth seal structure, significantly
Reduce leakage.As shown in Figure 7.
Claims (10)
1. a kind of torque motor promotes EGR valve, it is characterised in that: including valve body (2), the center-pole being arranged in valve body (2)
(12), it is assemblied on center-pole (12) for matching the upper valve core being sealed with top seal mouth and lower seal mouth respectively
(11) and bottom spool (14)；The upper valve core (11) and bottom spool (14) it is in the same size；The upper outside of the valve body (2) is solid
Equipped with torque motor (21), the drive shaft of torque motor (21) is inserted into the valve body above center-pole (12) from the side wall of valve body (2)
(2) in, the inner end bias of drive shaft is fixedly connected with the driving plate (9) of cam-like；Torsionspring is housed in the drive shaft
(19), and one end of torsionspring (19) is inserted on driving plate (9)；It is offered in driving plate (9) by upper rail and lower railway
The arc-shaped movement slots (24) of composition are movably set with bearing (17) in movement slots (24)；The top of the center-pole (12)
It being installed with sliding block (7), opening plate is provided at the top of sliding block (7), the bottom of driving plate (9) is located in the opening of the plate,
And bearing (17) is arranged on the plate of the opening two sides by the resilient key (16) being through in its inner hole.
2. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: the upper rail and lower railway
It is and to get on the right track and the both ends of lower railway are divided equally using the cam base circle center of driving plate (9) as the arc-shaped rail in the center of circle
It is not connected excessively with circular arc.
3. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: the lower part in the valve body (2)
Bottom spool seat ring (13) are installed in seal；Bottom spool seat ring (13) elastic conjunction in lower seal mouth, and under
Multiple riveting blocks are uniformly arranged between spool seat ring (13) and lower seal mouth.
4. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: be installed in the valve body (2)
Guide sleeve seat (4), being press-fitted on guide sleeve seat (4) has guide sleeve (5), and the top of the center-pole (12) is inserted in guide sleeve (5).
5. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: the bottom face of the sliding block (7)
On offer guiding jack (25), be inserted in the guiding jack (25) at the top of the center-pole (12), and center-pole (12)
Axial position is adjustable in guiding jack (25), and there are axially adjustable space (26) in guiding jack (25).
6. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: on the side of the sliding block (7)
It offers for the hollow hole as welded rails (27).
7. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: the top of the valve body (2) is set
It is equipped with dustproof cover (18), and is provided with fastening bolt (15) on dustproof cover (18)；The bottom of valve body (2) is provided with blanking cover (1),
Blanking cover (1) elastic conjunction is evenly arranged with multiple riveting blocks in the bottom of valve body (2) between blanking cover (1) and valve body (2)；
Water inlet pipe (3) and outlet pipe (10) are provided on the valve body (2).
8. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: upper valve core (11) interference
It is assemblied in the middle part of center-pole (12), and is evenly arranged between upper valve core (11) and center-pole (12) multiple for being consolidated
It is scheduled on riveting block together, the boss for holding upper valve core (11) is fixedly provided on the center-pole (12)；The bottom spool
(14) lower end of the elastic conjunction in center-pole (12)；The bottom end of the center-pole (12) protrusion from bottom spool (14), and
A circle solder fillet is installed with the junction of bottom spool (14).
9. a kind of torque motor according to claim 8 promotes EGR valve, it is characterised in that: the bottom of the center-pole (12)
The notch for being flared after bottom spool (14) assembly is offered on end face.
10. a kind of torque motor according to claim 1 promotes EGR valve, it is characterised in that: upper in the valve body (2)
It is provided with lip seal (6) in the axis hole of end, and the lip of lip seal (6) is downward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920008213.7U CN209228493U (en) | 2019-01-03 | 2019-01-03 | Torque motor promotes EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920008213.7U CN209228493U (en) | 2019-01-03 | 2019-01-03 | Torque motor promotes EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209228493U true CN209228493U (en) | 2019-08-09 |
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ID=67510149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920008213.7U Active CN209228493U (en) | 2019-01-03 | 2019-01-03 | Torque motor promotes EGR valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458280A (en) * | 2019-01-03 | 2019-03-12 | 无锡隆盛科技股份有限公司 | Torque motor promotes EGR valve |
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2019
- 2019-01-03 CN CN201920008213.7U patent/CN209228493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109458280A (en) * | 2019-01-03 | 2019-03-12 | 无锡隆盛科技股份有限公司 | Torque motor promotes EGR valve |
| CN109458280B (en) * | 2019-01-03 | 2024-06-21 | 无锡隆盛科技股份有限公司 | Torque motor lifting EGR valve |
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