CN202500682U

CN202500682U - Vacuum electromagnetic adjuster

Info

Publication number: CN202500682U
Application number: CN2012201452322U
Authority: CN
Inventors: 陈凯; 倪铭; 张华�; 肖�琳; 邵兴隆
Original assignee: Wuxi Longsheng Technology Co Ltd
Current assignee: Wuxi Longsheng Technology Co Ltd
Priority date: 2012-04-07
Filing date: 2012-04-07
Publication date: 2012-10-24
Anticipated expiration: 2022-04-07

Abstract

The utility model discloses a vacuum electromagnetic adjuster. The vacuum electromagnetic adjuster comprises a valve body, a valve core and an electromagnetic coil, the valve core is arranged in the valve body, an oil-free bearing is arranged on an outer ring of the valve core, a skeleton is arranged on an outer ring of the oil-free bearing, the electromagnetic coil is arranged on an outer ring of the skeleton, a magnetic permeability pipe is arranged on an outer ring of the electromagnetic coil, a return rubber pad is arranged above the valve core, an air vent is arranged in the middle of the valve core, a through hole is arranged in the middle of the return rubber pad, an exhaust gas recirculation (EGR) valve connecting pipe is arranged on the valve body, a second hollow cavity body is formed between the upper end of the magnetic permeability pipe and the return rubber pad, the EGR valve connecting pipe and the second hollow cavity body are communicated through a connecting hole, a first hollow cavity body is arranged on the upper portion of the interior of the valve body, the first hollow cavity body is connected with a vacuum source connecting pipe, an ejector rod is arranged above the return rubber pad in the valve body, the upper end of the ejector rod extends into the first hollow cavity body, and a spring is arranged in the first hollow cavity body above the ejector rod. The vacuum electromagnetic adjuster has the advantages that the clamping stagnation phenomenon between the valve core and a saddle in prior structures is avoided, and abnormal noises produced by return rubber jitter caused by vacuum fluctuation in the first hollow cavity body can be prevented.

Description

Vacuum electromagnetic regulator

Technical field

The utility model relates to the valve opening controlling device in a kind of engine exhaust emission gas recirculation system (egr system), belongs to engine exhaust emission control technique field.

Background technique

Vacuum electromagnetic regulator is as playing the device of regulating the EGR gas flow in the engine exhaust-gas recirculating system (egr system); Its major function is that different duty through regulating the vacuum electromagnetic regulator coil voltage is (in a string desirable pulse interval sequence; The ratio in the endurance of positive pulse and total cycle of pulse) regulate the degree of vacuum size, realize the control of valve opening size.

Present vacuum governor structure is as shown in Figure 1, and first connecting tube 32 connects vacuum source, and second connecting tube 34 connects the EGR valve; Through regulating the distance of 36 of copper pin 33 and sealing gaskets, control the speed that the air in first cavity 25 is extracted out by vacuum source, finally regulate the size of EGR valve opening; The distance that copper pin 33 and sealing gasket are 36 is behind coil electricity, to regulate through the electromagnetic force size of 40 pairs of spools 39 of saddle, and in the starting stage of vacuum electromagnetic regulator work, valve core 39 is under the electromagnetic force effect of saddle 40; The amplitude of vertical tremor is bigger, the upwards vibrations of each spool, and copper pin 33 all can be fitted with sealing gasket 36; The air that have between sealing gasket 36 and the block 35 in 26, the first cavitys 25 of a little gap will pass through this gap 26, and inlet hole 38 and atmosphere on the vent on the valve core 39 27, valve body 41; Because the inertia of valve core 39 is bigger; So it is longer to reach the required time of steady state, the stable distance of finally working as copper pin 33 and sealing gasket 36 is to certain value, and block 35 just is fitted in one with sealing gasket 36; Second cavity 28 is just kept apart with first cavity 25 fully, and the aperture of EGR just is stabilized in some values.And saddle 40 is in case assemble with following concentrating flux plate 31; Both relative positions just can't change; So the positional error that in assembly process, produces will directly influence product performance, have relatively high expectations with respect to the coaxality of valve core head 29 in saddle hole 30, and valve core 39 causes product clamping stagnation or abnormal sound easily with saddle 40 coaxality generation deviations; Thereby the generation fault makes the vacuum electromagnetic regulator decreased performance.

Summary of the invention

The purpose of the utility model is to overcome the deficiency that exists in the existing vacuum governor, provides a kind of can avoiding to produce clamping stagnation or abnormal sound, and operation troubles is little, steady quality, the vacuum electromagnetic regulator that performance is good.

The technological scheme of the utility model is:

A kind of vacuum electromagnetic regulator comprises valve body, spool, electromagnetic coil, and spool is arranged in the valve body; The outer ring of spool is provided with oilless bearing, and the outer ring of oilless bearing is provided with skeleton, and electromagnetic coil is arranged on the outer ring of skeleton; The outer ring of electromagnetic coil is provided with magnetic conductive tube, and the spool top is provided with the return rubber pad, and the centre of spool is provided with vent; Be provided with through hole in the middle of the return rubber pad, valve body is provided with EGR valve connecting tube, forms second cavity body between the upper end of magnetic conductive tube and the return rubber pad; Be communicated with through attachment hole between the EGR valve connecting tube and second cavity body, the top in the valve body is provided with first cavity body, and first cavity body connects the vacuum source connecting tube; The top of return rubber pad is provided with push rod in the valve body, and first cavity body is stretched in the upper end of push rod, is provided with spring in top first cavity body of push rod; The lower end surface of second cavity body is provided with boss, and the push rod upper end is provided with annular projection near the boss place, is provided with caulking gum between annular projection and the boss.

Valve body comprises upper valve body connected to one another, center valve body, following valve body.

The upper end of magnetic conductive tube is arranged in the center valve body, and the lower end of magnetic conductive tube is arranged on down in the valve body.

Be provided with seal ring between upper valve body and the center valve body.

Upper valve body, center valve body link together through bolt between the following valve body.

Following valve body bottom is provided with filter screen.

Beneficial effect: the utility model is behind coil electricity; The upper end of magnetic conductive tube produces the suction-combining force to spool, moves upward after spool is stressed, and the vent of spool contacts with the lower end surface of push rod; Vent is plugged; Along with push rod continues to move upward, the spring in the push rod compression upper valve body, the caulking gum on the push rod separates with the boss of the second cavity body lower end surface; The vacuum source connecting tube just can bleed in EGR valve connecting tube through the gap between caulking gum and the boss, adopts this structure to avoid the catching phenomenon between the spool and saddle in the original structure; Return rubber is not in first cavity body in the utility model, and the fluctuation vacuum in first cavity body can not cause the shake of return rubber to produce abnormal sound, behind coil blackout; The spring force pushing mandril moves downward, and caulking gum and boss are fitted, and also separate with spool the lower end surface of push rod; Both these parts have formed a crack again, and the vacuum in second cavity body is just lost heart through the vent in the middle of the spool, make the EGR operation that restPoses; Fault is little, and steady quality, performance are good.

Description of drawings

Fig. 1 is a vacuum electromagnetic regulator structural representation of the prior art;

Fig. 2 is the structural representation of the utility model.

Among the figure: 1-upper valve body; 2-the first cavity body; 3-push rod; 3A-annular projection; 4-caulking gum; 5-boss; 6-center valve body; 7-magnetic conductive tube upper end; 8-the second cavity body; 9-following valve body; 10-spool; 11-oilless bearing; 12-skeleton; 13-electromagnetic coil; 14-magnetic conductive tube lower end; 15-return rubber pad; 16-through hole; 16A-vent; 17-EGR valve connecting tube; 18-attachment hole; 19-vacuum source connecting tube; 20-spring; 21-seal ring; Circular arc end face on 22-push rod 3; 23-filter screen; 24-magnetic conductive tube; 25-the first cavity; 26-gap; 27-vent; 28-the second cavity; 29-spool head; 30-saddle hole; 31-following concentrating flux plate; 32-the first connecting tube; 33-copper pin; 34-the second connecting tube; 35-block; 36-sealing gasket; 38-inlet hole; 39-valve core; 40-saddle; 41-valve body.

Embodiment

Below in conjunction with concrete accompanying drawing and embodiment the utility model is described further.

A kind of vacuum electromagnetic regulator comprises valve body, spool 10, electromagnetic coil 13, and spool 10 is arranged in the valve body; The outer ring of spool 10 is provided with oilless bearing 11, and the outer ring of oilless bearing 11 is provided with skeleton 12, and said electromagnetic coil 13 is arranged on the outer ring of skeleton 12; The outer ring of electromagnetic coil 13 is provided with magnetic conductive tube 24, and spool 10 tops are provided with return rubber pad 15, and the centre of spool 10 is provided with vent 16A; Be provided with through hole 16 in the middle of the return rubber pad 15, valve body is provided with EGR valve connecting tube 17, forms second cavity body 8 between the upper end 7 of magnetic conductive tube 24 and the return rubber pad 15; Be communicated with through attachment hole 18 between the EGR valve connecting tube 17 and second cavity body 8, the top in the valve body is provided with first cavity body, 2, the first cavity body 2 and connects vacuum source connecting tube 19; The top of return rubber pad 15 is provided with push rod 3 in the valve body; First cavity body 2 is stretched in the upper end of push rod 3, and the lower end surface that is provided with spring 20, the second cavity body 2 in top first cavity body 2 of push rod 3 is provided with boss 5; Push rod 3 upper ends are provided with annular projection 3A near boss 5 places, are provided with caulking gum 4 between annular projection 3A and the boss 5.

Valve body comprises upper valve body connected to one another 1, center valve body 6, following valve body 9.

The upper end 7 of magnetic conductive tube 24 is arranged in the center valve body 6, and the lower end 14 of magnetic conductive tube 24 is arranged on down in the valve body 9.

Be provided with seal ring 21 between upper valve body 1 and the center valve body 6.

Upper valve body 1, center valve body 6 link together through bolt between the following valve body 9.

Following valve body 9 bottoms are provided with filter screen 23.

Be provided with vent 16A in the middle of the spool 10; Be provided with through hole 16 in the middle of the return rubber pad 15; Can second cavity body 8 be in communication with the outside; Second cavity body 8 is communicated with through attachment hole 18 with EGR valve connecting tube 17, and first cavity body 2 realizes cutting off through the applying of caulking gum 4 with boss 5 with EGR valve connecting tube 17.

Push rod 3 can be up and down in valve body, and the annular projection 3A of push rod 3 withstands on the boss 5 through spring 20, and the lower end withstands on the through hole 16 in the middle of the return rubber pad 15.

As shown in the figure: as during work, after electromagnetic coil 13 energisings, to produce electromagnetic force spool 10 promotion push rods 3 are moved upward; Through hole 16 in the middle of vent 16A on the spool 10 and the return rubber pad 15 is fitted with the lower end surface of push rod 3 22, and vent 16A and through hole 16 are plugged, along with push rod 3 continues to move upward; Caulking gum 4 on the push rod 3 separates with boss 5; First cavity body 2 and second cavity body 8 connect through the gap between push rod 3 and the center valve body 6, the air in second cavity body 8 are got in first cavity body 2, at this moment electromagnetic force; The mutual balance of pressure difference on the return rubber 15 and spring force makes the EGR valve reach the expectation aperture.

After electromagnetic coil 13 outages, the elastic force of spring 20 is greater than the pressure difference on the return rubber 15, and push rod 3 is backed down by spring 20; Caulking gum 4 is fitted with boss 5 again; First cavity body 2 is just cut off with second cavity body 8, because separate with through hole 16 with vent 16A the lower end surface 22 on this moment push rod 3, extraneous barometric pressure is just through in vent 16A and through hole 16 entering second cavity body 8; Make the pressure recovery in second cavity body 8 arrive barometric pressure, the EGR valve cuts out.

Claims

1. a vacuum electromagnetic regulator comprises valve body, spool (10), electromagnetic coil (13), and it is characterized in that: said spool (10) is arranged in the valve body; The outer ring of spool (10) is provided with oilless bearing (11); The outer ring of oilless bearing (11) is provided with skeleton (12), and said electromagnetic coil (13) is arranged on the outer ring of skeleton (12), and the outer ring of electromagnetic coil (13) is provided with magnetic conductive tube (24); Spool (10) top is provided with return rubber pad (15); The centre of spool (10) is provided with vent (16A), is provided with through hole (16) in the middle of the return rubber pad (15), and valve body is provided with EGR valve connecting tube (17); Form second cavity body (8) between the upper end (7) of magnetic conductive tube (24) and the return rubber pad (15); Be communicated with through attachment hole (18) between EGR valve connecting tube (17) and second cavity body (8), the top in the valve body is provided with first cavity body (2), and first cavity body (2) connects vacuum source connecting tube (19); The top of return rubber pad (15) is provided with push rod (3) in the valve body; First cavity body (2) is stretched in the upper end of push rod (3), is provided with spring (20) in top first cavity body (2) of push rod (3), and the lower end surface of second cavity body (2) is provided with boss (5); Annular projection (3A) is located to be provided with near boss (5) in push rod (3) upper end, is provided with caulking gum (4) between annular projection (3A) and the boss (5).

2. vacuum electromagnetic regulator according to claim 1 is characterized in that: said valve body comprises upper valve body connected to one another (1), center valve body (6), following valve body (9).

3. vacuum electromagnetic regulator according to claim 2 is characterized in that: the upper end (7) of said magnetic conductive tube (24) is arranged in the center valve body (6), and the lower end (14) of magnetic conductive tube (24) is arranged on down in the valve body (9).

4. vacuum electromagnetic regulator according to claim 2 is characterized in that: be provided with seal ring (21) between said upper valve body (1) and the center valve body (6).

5. vacuum electromagnetic regulator according to claim 2 is characterized in that: said upper valve body (1), center valve body (6) link together through bolt between the following valve body (9).

6. vacuum electromagnetic regulator according to claim 2 is characterized in that: said valve body (9) bottom down is provided with filter screen (23).