CN202946247U - Butterfly valve used for engine exhausting auxiliary braking - Google Patents
Butterfly valve used for engine exhausting auxiliary braking Download PDFInfo
- Publication number
- CN202946247U CN202946247U CN 201220611697 CN201220611697U CN202946247U CN 202946247 U CN202946247 U CN 202946247U CN 201220611697 CN201220611697 CN 201220611697 CN 201220611697 U CN201220611697 U CN 201220611697U CN 202946247 U CN202946247 U CN 202946247U
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- butterfly valve
- auxiliary braking
- valve
- shaft
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Abstract
The utility model discloses a butterfly valve used for engine exhausting auxiliary braking. The butterfly valve used for engine exhausting auxiliary braking comprises a valve body. A valve block and an operation device are installed on the valve body, wherein the valve block can be driven to rotate by a rocker arm and block an exhausting channel and the operation device drives the rocker arm to rotate. An installation axis of the valve block is skewed relative to a central line of the valve body. The operation device comprises a single-action air cylinder. A piston and a piston shaft are installed in the single-action air cylinder. One end of the piston shaft is connected with the rocker arm shaft. A balancing device is further installed in the single-action air cylinder. The butterfly valve used for engine exhausting auxiliary braking has the advantages that the balancing device is arranged in the single-action air cylinder, and the balancing device is simple and compact in structure and low in cost, so that mutual separation of a reduction gear and the balancing device is achieved. When the butterfly valve used for engine exhausting auxiliary braking is used, the single-action air cylinder and the balancing device placed inside the single-action air cylinder can not be affected by the high temperature of tail gas exhausted by an automobile, so that the butterfly valve used for engine exhausting auxiliary braking has the advantages of being high in usage reliability, long in service life and good in stability.
Description
Technical field
The utility model belongs to the car auxiliary brake technical field, especially relates to a kind of, butterfly valve that have Equilibrator that use for the engine exhaust auxiliary braking.
Background technique
The braking butterfly valve that plays brake assisting effect all is installed in the engine exhaust passage of high-power heavy type automobile exhaust braking system, this common braking butterfly valve comprise single-acting cylinder and drive thereof valve block, the valve body of valve block and cylinder be used for to be installed, this butterfly valve only plays on-off action, can't regulate the size of engine exhaust back pressure value, and when the back pressure value is too low, auxiliary braking does not have effect, causes the potential safety hazard in Vehicle Driving Cycle; When the engine exhaust back pressure value is too high, easily cause the damage of motor associated components, make vehicle to travel.
a kind of as prior art, although EVB exhaust brake butterfly valve can be regulated the exhaust back pressure of motor automatically, but because the valve block of EVB exhaust brake butterfly valve is installed axis and with respect to the valve body center, skew is arranged, when valve block is closed, the acting surface that bears air pressure produces an eccentric force with respect to spindle central, eccentric force makes torsion bar spring produce certain windup-degree, and then the band moving valve plate is opened, off-load, therefore, the key of this kind butterfly valve manufacturing is torsion bar spring, hardness after its material and heat treatment is key issue, and the hardness after heat treatment is a value range, different hardness, its warping force varies in size, be difficult to accurate control, in use, if torsion bar spring deforms, this butterfly valve is controlled and was lost efficacy.
a kind of as prior art, the applicant (application number is 201120075287.6 in first to file, the application title be " a kind of constant-pressure exhaust braking butterfly valve ") in a kind of exhaust brake butterfly valve that is provided with relief arrangement on valve block is disclosed, this braking butterfly valve comprises the valve body with exhaust passage, but be equipped with on valve body and rotate the also valve block of closes vent passage under pitman arm shaft drives, and the drive unit of driving pitman arm shaft rotation, have the voltage stabilizing mouth on valve block, valve body is provided with the plunger type unloading valve that coordinates with the voltage stabilizing mouth, this unloading valve comprises plunger, one end of plunger is inserted in the voltage stabilizing mouth, the other end of plunger is connected with the adjustment spring, the other end of adjusting spring connects regulates plug, this plunger valve also comprises out the bleeder port on valve body.This valve carries out exhaust pressure relief by the bleeder port on unloading valve, and the size of predetermined pressure release value depends on the adjustment initial tension of spring.This kind butterfly valve body, valve block do not adopt eccentric structure, therefore process simply, be easy to guarantee precision, and still, the size of unloading valve off-load power places one's entire reliance upon and adjusts the pretightening force of spring, and after Regulation spring generation plastic deformation, pretightening force also changes thereupon.
Summary of the invention
the purpose of this utility model is to overcome the shortcoming that exists in prior art, a kind of engine exhaust auxiliary braking butterfly valve with Equilibrator is provided, this balance device structure is simple, cheap, efficient and can compact being included in single-acting cylinder, the technological scheme that adopts is: a kind of engine exhaust auxiliary braking butterfly valve, comprise valve body, but be equipped with on valve body and rotate the also valve block of closes vent passage under pitman arm shaft drives, and the Effector of driving pitman arm shaft rotation, the installation axis of described valve block has skew with respect to the valve body center line, it is characterized in that: described Effector comprises single-acting cylinder, piston and piston shaft are housed in described single-acting cylinder, one end of described piston shaft is connected with described pitman arm shaft, Equilibrator also is installed in described single-acting cylinder.
Technical characteristics of the present utility model also has: described Equilibrator comprises between described piston and piston shaft: the piston cavity that is arranged in piston; Balance spring, described balance spring are arranged on the piston shaft of piston cavity one end; Compress Spring, described Compress Spring one end is connected with piston, and the other end is connected with the cylinder cap of single-acting cylinder.
Technical characteristics of the present utility model also has: described piston comprises piston I and piston II, and described piston cavity is positioned on the piston I, and piston I and piston II are bolted and link together.
Technical characteristics of the present utility model also has: have the lining I between described piston shaft and piston.
Technical characteristics of the present utility model also has: have the lining II between described piston shaft and cylinder cap.
Technical characteristics of the present utility model also has: have rubber seal between the cylinder body of described piston and single-acting cylinder.
The beneficial effects of the utility model are: the utlity model has the Equilibrator that is arranged in single-acting cylinder, this balance device structure is simple, compact, with low cost, thereby has realized that speed reducer of the present utility model and Equilibrator are separated from each other.In use, single-acting cylinder and in the inner Equilibrator of position itself can not be subject to the temperatures involved of motor vehicle emission tail gas, have that operational safety is high, the life-span long, the advantage of good stability.
Description of drawings
Accompanying drawing 1 is the utility model plan view, and accompanying drawing 2 is plan views of accompanying drawing, wherein, the 1st, valve block, the 2nd, valve body, the 3rd, pitman arm shaft, the 4th, rocking arm, the 5th, supporting plate, the 6th, single-acting cylinder, the 7th, cylinder cap, the 8th, cylinder body, the 9th, piston shaft, the 10th, Compress Spring, the 11st, piston, the 12nd, balance spring, the 13rd, end cap, the 14th, lining I, the 15th, piston shaft projection, the 16th, lining II, the 17th, piston cavity.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described.This engine exhaust auxiliary braking comprises valve body 2 with butterfly valve, but under driving, pitman arm shaft 3 rotates and the valve block 1 of closes vent passage being equipped with on valve body 2, Effector is used for realizing the rotation of pitman arm shaft 3, the installation axis of valve block 1 has skew with respect to valve body 2 center lines, this side-play amount is X, and X is generally 2% ~ 6% of valve body 2 latus rectums.
This Effector comprises single-acting cylinder 6, and single-acting cylinder 6 connects as one by supporting plate 5 and valve body 2.Piston 11 and piston shaft 9 are housed in single-acting cylinder 6, and an end of piston shaft 9 is connected with pitman arm shaft 3, and Equilibrator also is installed in single-acting cylinder 6, and then realizes the movement of piston shaft 9 under Equilibrator drives.Equilibrator comprises between piston 11 and piston shaft 9: the piston cavity 17 that is arranged in piston 11; Balance spring 12, balance spring 12 are arranged on the piston shaft 9 of piston cavity 17 1 ends; Compress Spring 10, Compress Spring 10 1 ends are connected with piston 11, and the other end is connected with the cylinder cap 7 of single-acting cylinder 6.
In the present embodiment, piston 11 is comprised of two-part: piston I and piston II, have piston cavity on the piston I, and piston I and piston II are bolted and link together.For the ease of balance spring 12 is installed, have piston shaft projection 15 at piston shaft 9 near an end of pistons 11, like this, in fact between piston shaft projection 15 and piston 11, piston shaft projection 15 plays the effect of auxiliary positioning to balance spring 12.Have the lining I between piston shaft 9 and piston 11, realized the floating connection between piston shaft 9 and piston 11.Also has lining II 16 between piston shaft 9 and cylinder cap 7.In order to seal, have rubber seal between the cylinder body 8 of piston shaft 9 and single-acting cylinder 6, also have rubber seal between cylinder cap 7 and cylinder body 8.
Working principle is: when single-acting cylinder 6 was not inflated action, valve block 1 was opened fully, and diagram L, M are maximum value.During single-acting cylinder 6 inflation work, valve block 1 is closed fully, and diagram L=0(is that the stroke of cylinder is the L maximum value), the M value reduces (being balance spring 12 generating portion compressions).because the installation axis of valve block 1 has skew with respect to valve body 2 center lines, when valve block 1 is closed, engine exhaust back pressure raises, the active area that valve block 1 bears air pressure does not wait, under gas pressure, can produce an eccentric force, this eccentric force is by pitman arm shaft 3, Rocker arm 4 is applied on piston shaft 9, when eccentric force greater than Equilibrator in during the pretightening force of balance spring 12, piston shaft 9 can move to single-acting cylinder inlet end direction, band moving valve plate 1 opening clearance, off-load, engine exhaust back pressure reduces, the eccentric force that acts on valve block 1 decreases, piston shaft 9 reinstatements, valve block 1 is closed fully.This butterfly valve is mainly to realize automatically regulating engine exhaust back pressure by the pre compressed magnitude of adjusting the Equilibrator medi-spring and the rigidity of setting spring, and it is guaranteed in allowed limits.The size of engine exhaust back pressure can be come by the part-structure of adjusting end cap 13 pretightening force of adjustment spring 12.
Reliability and working life in order to guarantee Equilibrator are provided with piston shaft projection 15 on piston shaft 9, making the maximum reverse displacement distance of piston shaft 9 is M, has guaranteed life and reliability.
Certainly; above-mentioned explanation is not limitation of the utility model; the utility model also is not limited only to above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also belong to protection domain of the present utility model.
Claims (6)
1. engine exhaust auxiliary braking butterfly valve, comprise valve body, but be equipped with on valve body and rotate the also valve block of closes vent passage under pitman arm shaft drives, and the Effector of driving pitman arm shaft rotation, the installation axis of described valve block has skew with respect to the valve body center line, it is characterized in that: described Effector comprises single-acting cylinder, piston and piston shaft are housed in described single-acting cylinder, one end of described piston shaft is connected with described pitman arm shaft, and Equilibrator also is installed in described single-acting cylinder.
2. according to engine exhaust auxiliary braking butterfly valve claimed in claim 1, it is characterized in that: described Equilibrator comprises between described piston and piston shaft: the piston cavity that is arranged in piston; Balance spring, described balance spring are arranged on the piston shaft of piston cavity one end; Compress Spring, described Compress Spring one end is connected with piston, and the other end is connected with the cylinder cap of single-acting cylinder.
3. according to engine exhaust auxiliary braking butterfly valve claimed in claim 2, it is characterized in that: described piston comprises piston I and piston II, and described piston cavity is positioned on the piston I, and piston I and piston II are bolted and link together.
4. according to engine exhaust auxiliary braking butterfly valve claimed in claim 2, it is characterized in that: have the lining I between described piston shaft and piston.
5. according to engine exhaust auxiliary braking butterfly valve claimed in claim 4, it is characterized in that: have the lining II between described piston shaft and cylinder cap.
6. according to engine exhaust auxiliary braking butterfly valve claimed in claim 2, it is characterized in that: have rubber seal between the cylinder body of described piston and single-acting cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611697 CN202946247U (en) | 2012-11-19 | 2012-11-19 | Butterfly valve used for engine exhausting auxiliary braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220611697 CN202946247U (en) | 2012-11-19 | 2012-11-19 | Butterfly valve used for engine exhausting auxiliary braking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946247U true CN202946247U (en) | 2013-05-22 |
Family
ID=48421955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220611697 Expired - Fee Related CN202946247U (en) | 2012-11-19 | 2012-11-19 | Butterfly valve used for engine exhausting auxiliary braking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301929A (en) * | 2018-03-08 | 2018-07-20 | 东风商用车有限公司 | A kind of exhaust brake valve |
| CN111911291A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | High back pressure exhaust brake valve system |
-
2012
- 2012-11-19 CN CN 201220611697 patent/CN202946247U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301929A (en) * | 2018-03-08 | 2018-07-20 | 东风商用车有限公司 | A kind of exhaust brake valve |
| CN111911291A (en) * | 2020-08-18 | 2020-11-10 | 湖北力美制动元件有限公司 | High back pressure exhaust brake valve system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20151119 |
|
| EXPY | Termination of patent right or utility model |