CN203146149U - Vacuum EGR valve structure enhancing valve rod motion perpendicularity - Google Patents
Vacuum EGR valve structure enhancing valve rod motion perpendicularity Download PDFInfo
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- CN203146149U CN203146149U CN2013201558035U CN201320155803U CN203146149U CN 203146149 U CN203146149 U CN 203146149U CN 2013201558035 U CN2013201558035 U CN 2013201558035U CN 201320155803 U CN201320155803 U CN 201320155803U CN 203146149 U CN203146149 U CN 203146149U
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- valve
- valve rod
- seat
- honour
- perpendicularity
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- 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
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Abstract
The utility model discloses a vacuum EGR valve structure enhancing valve rod motion perpendicularity. The vacuum EGR valve structure enhancing the valve rod motion perpendicularity comprises a valve cover and a valve base which are assembled in a matched mode, a valve rod is installed in a cavity formed by the valve cover and the valve base, the upper portion of the valve rod is positioned through a lower base and an upper base, a membrane is arranged between the lower base and the upper base, and the edge of the membrane is pressed tightly in the connecting position of the valve cover and the valve base. A spring is arranged on the inner wall of the valve cover and used for resetting the valve rod, the top end of the valve rod is a thread section provided with external threads, and a nut is assembled on the thread section in a matched mode. A clamping groove is formed in the upper portion of the valve rod, a sealing mechanism is arranged on the periphery of the clamping groove in a sleeved mode, and the valve rod is pressed tightly on the upper base through the sealing mechanism under the action of the nut. The vacuum EGR valve structure can enable the valve rod to keep good perpendicularity in an assembling process, eliminates the noise generated due to tilt of the valve rod in a working process of an EGR valve, and improves working reliability of the EGR valve.
Description
Technical field
The utility model relates to a kind of EGR valve arrangement in the engine exhaust emission control gear field, particularly engine exhaust emission gas recirculation system.
Background technique
The EGR valve is mainly used in regulating the flow of control EGR gas in engine exhaust-gas recirculating system (egr system), vacuum EGR valve is by the position of the size adjustment valve rod of degree of vacuum in the vacuum chamber, further control the aperture size of suction port, thereby adjusting exhaust gas flow, return cylinder after making waste gas and fresh air mixing by a certain percentage and carry out recirculation, with reduction combustor inner cylinder temperature and velocity of combustion, thus the further discharge amount that reduces NOX.
At present vacuum EGR valve is installed in spring in the valve gap earlier in assembly process usually, then valve rod is passed down successively, is assembled into one behind epithelium and the seat of honour; Again epithelium is placed on the valve seat at last, compresses by valve gap.Because the gap is bigger between spring and the valve gap, so the EGR valve causes spring to tilt in being press-fitted process easily, thereby causes the EGR valve valve rod that is connected with the spring bottom can not vertical motion in movement process, can only do the motion of relative tilt.In addition, all adopt the mode of revolving riveting in the process that assemble at valve rod upper end and the seat of honour of EGR valve, make valve rod in revolving the process of riveting, produce distortion owing to being subjected to inhomogeneous axial impact force, inclination when further strengthening stem movement, thereby make the fricting movement of doing relative tilt between valve rod and the valve seat, not only damage valve rod easily, and can produce bigger noise in the course of the work.
Summary of the invention
The technical problem that the utility model solves provides a kind of EGR structure that can guarantee valve seat medi-spring and valve rod perpendicularity, and the inclination during with the reduction stem movement reduces noise, further improves the reliability of EGR valve work.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
Strengthen the vacuum EGR valve arrangement of stem movement perpendicularity, comprise equipped mutually valve gap and valve seat, be provided with the valve rod that stretches out valve seat in the cavity that valve gap and valve seat form, the top of valve rod is by being positioned at following and location, the seat of honour of cavity, be provided with between described following and the seat of honour cavity is divided into the epithelium of two Room up and down, the edge of epithelium is pressed on the joint of valve gap and valve seat; The valve gap inwall is provided with the spring be used to the valve rod that resets; The top of described valve rod is for being provided with externally threaded thread section, and thread section is fitted with the nut that press-fits valve rod; The top that valve rod is close to the seat of honour is provided with draw-in groove, and the draw-in groove periphery is set with sealing mechanism; Described valve rod is pressed on the seat of honour by sealing mechanism under the effect of nut.
The concrete structure of described sealing mechanism is: described sealing mechanism comprises and is inlaid in the seal washer that is adjacent to the seat of honour in the draw-in groove and is sleeved on the rubber washer between nut and seal washer and pad on the valve rod.
Improvement of the present utility model is: the bottom that described valve rod is positioned at the valve seat below is provided with the flat position of being convenient to the clamping valve rod.
Further improvement of the utility model is: described valve rod is by seat board is equipped mutually with following down.
Improvement of the present utility model also is: the upper end of described spring is fixedly connected on the roof of valve gap by the spring seat of honour.
Owing to adopted above technological scheme, the obtained technological progress of the utility model is as follows.
The utility model is by changing the structure of valve stem tip, and then change valve rod and the assembling mode of the seat of honour with following, solved since adopt revolve that riveting assembling mode exists in assembly process owing to being subjected to the problem that inhomogeneous axial impact force produces distortion, make valve rod in assembly process, keep good perpendicularity, eliminated in the EGR valve working procedure because the noise that valve rod tilts to produce.The setting of sealing mechanism between valve rod and the seat of honour can prevent effectively that waste gas from entering in the vacuum chamber from the circumferential surface leakage of valve rod, guaranteed the sealability of EGR valve.Clamping valve rod in assembly process is convenient in the flat position that the valve rod bottom arranges, to reduce the damage to valve rod.Valve rod can accurately be located the central axis of valve rod by seat board is equipped with following down, prevents that valve rod from not causing valve rod to rock with following equipped not agreeing with.
Spring in the utility model is arranged on the valve gap by the spring seat of honour, can increase the area of contact of spring and valve gap, make the point of action of spring force on the valve gap circumferencial direction, evenly distribute, can be because of active force inhomogeneous and run-off the straight on valve gap thereby guarantee to make when making progress vertical motion spring when valve rod, further effectively reduce the noise that valve rod produces because of banking motion, improve the reliability of EGR valve work.
Description of drawings
Fig. 1 is the structural representation of valve rod described in the utility model.
Fig. 2 is structural representation of the present utility model.
Wherein: 1, valve rod, 2, draw-in groove, 3, thread section, 4, flat position, 5, seat board down, 6, following, 7, epithelium, 8, the seat of honour, 9, seal washer, 10, pad, 11, rubber washer, 12, nut, 13, vacuum chamber, 14, the spring seat of honour, 15, valve gap, 16, spring, 17, valve seat.
Embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further elaborated.
A kind of vacuum EGR valve arrangement that strengthens the stem movement perpendicularity, its structure as shown in Figure 2.Vacuum EGR valve comprises equipped mutually valve gap 15 and valve seat 17, is provided with the valve rod 1 that stretches out valve seat 17 in the cavity that valve gap and valve seat form, and the top of valve rod 1 is by being positioned at following 6 and 8 location, the seat of honour of cavity.Be provided with epithelium 7 between following seat 6 and the seat of honour 8, the edge of epithelium is pressed on the joint of valve gap 15 and valve seat 17, is used for cavity is divided into two Room up and down, and last chamber is vacuum chamber 13.
The structure of valve rod 1 as shown in Figure 1, the top of valve rod is for being provided with externally threaded thread section 3, thread section 3 is fitted with the nut 12 that press-fits valve rod.The top that valve rod 1 is close to the seat of honour 8 is provided with draw-in groove 2, and draw-in groove 2 peripheries are set with sealing mechanism.The bottom that valve rod 1 is positioned at valve seat 17 belows is provided with flat position 4, is convenient to clamping valve rod in the process of assembling valve rod.
Sealing mechanism comprises seal washer 9, pad 10 and the rubber washer 11 that is sleeved on the valve rod, and wherein seal washer 9 is inlaid in the draw-in groove 2, and the lower end surface of seal washer is adjacent on the seat of honour 8, and pad 10 is between seal washer 9 and rubber washer 11.Valve rod is being pressed on the seat of honour 8 by sealing mechanism under the effect of nut.
Be provided with spring 16 in the vacuum chamber 13, be used for resetting valve rod 1.The top of spring 16 is fixedly connected on by the spring seat of honour 14 on the roof of valve gap 15, and the bottom of spring 16 is fixed on the seat of honour 8.The concentricity axis of the utility model medi-spring and valve rod.
During the utility model assembling, at first the upper end of valve rod is passed down successively seat board 5, following 6, epithelium 7, the seat of honour 8, the draw-in groove end clamps seal washer 9, seal washer 9 upper end suit pad 10 and rubber washers 11, clamp 4 places, flat position of valve rod 1 at last, by screwing nut 12, make epithelium 7, seal washer 9 and rubber washer 11 extrusion-deformations, valve rod is assemblied on the seat of honour and following.Secondly valve seat is passed in the bottom of valve rod, make the edge of epithelium be positioned at the upper edge of valve seat, mounting spring 16 on the seat of honour again, and make spring and the concentricity axis of valve rod.Then at the roof of the valve gap welding spring seat of honour 14, the top of spring is fixedly connected on the spring seat of honour 14.At last valve gap is fitted in and namely finishes assembling work on the valve seat.
Claims (5)
1. vacuum EGR valve arrangement that strengthens the stem movement perpendicularity, comprise equipped mutually valve gap (15) and valve seat (17), be provided with the valve rod (1) that stretches out valve seat (17) in the cavity that valve gap and valve seat form, following (6) and the seat of honour (8) location of the top of valve rod (1) by being positioned at cavity, be provided with between described following (6) and the seat of honour (8) cavity is divided into the up and down epithelium (7) of two Room, the edge of epithelium is pressed on the joint of valve gap (15) and valve seat (17); Valve gap (15) inwall is provided with the spring (16) be used to the valve rod that resets (1); It is characterized in that: the top of described valve rod (1) is for being provided with externally threaded thread section (3), and thread section (3) is fitted with the nut (12) that press-fits valve rod; The top that valve rod (1) is close to the seat of honour (8) is provided with draw-in groove (2), and draw-in groove (2) periphery is set with sealing mechanism; Described valve rod is being pressed on the seat of honour (8) by sealing mechanism under the effect of nut.
2. the vacuum EGR valve arrangement of enhancing stem movement perpendicularity according to claim 1 is characterized in that: described sealing mechanism comprises and is inlaid in the seal washer (9) that is adjacent to the seat of honour (8) in the draw-in groove (2) and is sleeved on rubber washer (11) and the pad (10) that is positioned on the valve rod (1) between nut (12) and the seal washer (9).
3. the vacuum EGR valve arrangement of enhancing stem movement perpendicularity according to claim 1 is characterized in that: the bottom that described valve rod (1) is positioned at valve seat (17) below is provided with the flat position (4) of being convenient to the clamping valve rod.
4. the vacuum EGR valve arrangement of enhancing stem movement perpendicularity according to claim 1 is characterized in that: described valve rod is equipped with following (6) mutually by seat board (5) down.
5. the vacuum EGR valve arrangement of enhancing stem movement perpendicularity according to claim 1, it is characterized in that: the upper end of described spring is fixedly connected on the roof of valve gap (15) by the spring seat of honour (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201558035U CN203146149U (en) | 2013-03-29 | 2013-03-29 | Vacuum EGR valve structure enhancing valve rod motion perpendicularity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201558035U CN203146149U (en) | 2013-03-29 | 2013-03-29 | Vacuum EGR valve structure enhancing valve rod motion perpendicularity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146149U true CN203146149U (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201558035U Expired - Lifetime CN203146149U (en) | 2013-03-29 | 2013-03-29 | Vacuum EGR valve structure enhancing valve rod motion perpendicularity |
Country Status (1)
| Country | Link |
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| CN (1) | CN203146149U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174553A (en) * | 2013-03-29 | 2013-06-26 | 无锡隆盛科技股份有限公司 | Vacuum exhaust gas recirculation (EGR) valve structure capable of enhancing valve rod motion verticality |
| CN104358628A (en) * | 2014-11-28 | 2015-02-18 | 无锡隆盛科技股份有限公司 | Assembling structure for thin film and valve rod of EGR (exhaust gas recirculation) valve |
-
2013
- 2013-03-29 CN CN2013201558035U patent/CN203146149U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174553A (en) * | 2013-03-29 | 2013-06-26 | 无锡隆盛科技股份有限公司 | Vacuum exhaust gas recirculation (EGR) valve structure capable of enhancing valve rod motion verticality |
| CN104358628A (en) * | 2014-11-28 | 2015-02-18 | 无锡隆盛科技股份有限公司 | Assembling structure for thin film and valve rod of EGR (exhaust gas recirculation) valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |
|
| CX01 | Expiry of patent term |