CN203626972U - Engine exhaust brake butterfly valve - Google Patents
Engine exhaust brake butterfly valve Download PDFInfo
- Publication number
- CN203626972U CN203626972U CN201320773445.4U CN201320773445U CN203626972U CN 203626972 U CN203626972 U CN 203626972U CN 201320773445 U CN201320773445 U CN 201320773445U CN 203626972 U CN203626972 U CN 203626972U
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- Prior art keywords
- valve block
- exhaust
- pore
- engine exhaust
- seal ring
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- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The utility model discloses an engine exhaust brake butterfly valve, which comprises a valve body, a rotating shaft, a valve block and a power mechanism, wherein the valve block is fixed in the inner cavity of the valve body by the rotating shaft; the valve block is connected with the power mechanism; the power mechanism drives the valve block to overturn in the inner cavity by taking the rotating shaft as a center; when the valve block is closed, the inner cavity is divided into an air inlet cavity and an air exhaust cavity; the valve block is fixedly provided with a sealing ring which is used for forming sealing connection with the cavity wall of the inner cavity; the sealing face between the sealing ring and the cavity wall of the inner cavity is staggered by hollow parts on the sealing ring. According to the engine exhaust brake butterfly valve, the hollow parts which do not contact with the cavity wall of the air inlet cavity are arranged on the sealing ring, the sealing face is arranged in a staggered way, under the premise of ensuring enough width of the sealing ring, the contact area of the sealing ring and the cavity wall of the inner cavity is reduced, the sealing ring can be easily squeezed and deformed, the operation torque during the opening and closing of the valve block is reduced, the energy consumption of an engine is reduced, the opening and closing flexibility of the valve block is ensured, and the normal operation of exhaust and brake functions of the engine is ensured.
Description
Technical field
The utility model relates to a kind of engine components, particularly a kind of engine exhaust and brake butterfly valve.
Background technique
Along with commercial car increases the requirement of braking system, only rely on the user demand that can not meet client to traditional braking system upgrading completely, the auxiliary braking so arisen at the historic moment, although auxiliary braking does not reach the so large braking force of primary brake system output, but car load utilizes auxiliary braking both to reduce the wearing and tearing of friction plate while needing to slow down in the process of moving, can also play the effect of braking deceleration.Exhaust brake is a kind of retarding braking of auxiliary driving braking action, and its simple in structure, low price, is widely used on diesel-powered truck or passenger vehicle.Exhaust and brake system is normally installed an exhaust brake butterfly valve at engine exhaust pipe place, in the time that exhaust brake is inoperative, valve block opens, outlet pipe conducting, does not affect the normal work of motor, in the time that exhaust brake works, the cylinder of braking butterfly valve is accepted the energy from motor, piston in cylinder promotes rotating shaft and rotates, thereby valve block is closed, outlet pipe stops up, the fuel feeding of the mandatory cut-out motor of oil-break mechanism simultaneously, the automobile travelling drives engine crankshaft rotation, engine piston is in exhaust stroke, the gas of discharging is closed compressed because braking valve block, produce pressure, motor is worked as gas compressor, when compressed gas makes exhaust, piston stroking upward produces resistance, strengthen the loss of calming the anger of motor, thereby play braking effect.
In exhaust brake butterfly valve manufactures and designs, the intensity of seal ring has directly limited the maximum permissible pressure of valve body, the cooperate degree of valve seat and seal ring directly affects valve leak grade, and the linkage structure of rotating shaft and valve block has affected valve body processing and assembling and in actual conditions, opened and closed the safety rate of valve block.Existing exhaust brake butterfly valve, comprise valve body, rotating shaft, valve block and power mechanism, valve block is fixed on by rotating shaft in the inner chamber of valve body, valve block is connected with power mechanism, and power mechanism band moving valve plate overturns centered by rotating shaft in described inner chamber, when valve block is closed, inner chamber is separated into air-inlet cavity and exhaust cavity, on valve block, be fixed with for forming with air-inlet cavity the seal ring being tightly connected, the whole outer ring of seal ring all contacts with air-inlet cavity sealing, therefore has higher intensity, and anti-leak result is remarkable.But the seal ring elasticity of this structure is poor, belongs to pressure forced seal between seal ring and inner chamber, so that valve block is opened operation moment of torsion while closing is larger, increase the energy loss of motor, also affect valve block and opened the flexibility ratio of closing.
Therefore, be necessary existing exhaust brake butterfly valve to improve, make between the outer ring of its seal ring and inner chamber contact more reasonable, on the basis that ensures leakage effect, reduce area of contact, make seal ring be easy to extrusion-deformation, open the operation moment of torsion while closing to reduce valve block, reduce the energy loss of motor, ensure that valve block opens the flexibility ratio of closing, ensure the normal operation of engine exhaust and brake function.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of engine exhaust and brake butterfly valve, contacting between the outer ring of its seal ring and inner chamber is more reasonable, on the basis that ensures leakage effect, reduce area of contact, make seal ring be easy to extrusion-deformation, open the operation moment of torsion while closing to reduce valve block, reduce the energy loss of motor, ensure that valve block opens the flexibility ratio of closing, ensure the normal operation of engine exhaust and brake function.
Engine exhaust and brake butterfly valve of the present utility model, comprise valve body, rotating shaft, valve block and power mechanism, described valve block is fixed on by described rotating shaft in the inner chamber of described valve body, described valve block is connected with described power mechanism, described power mechanism drives described valve block in described inner chamber, to overturn centered by described rotating shaft, when described valve block is closed, described inner chamber is separated into air-inlet cavity and exhaust cavity, on described valve block, be fixed with for forming with the chamber wall of described inner chamber the seal ring being tightly connected, sealing surface between described seal ring and described inner chamber chamber wall is staggered by the hollow part on described seal ring.
Further, the surface, outer ring of described seal ring forms described hollow part in the mode of part indent.
Further, the outer ring centre of surface indent of described seal ring, the longitudinal section of described outer ring is " U " shape, the both sides of described hollow part are sealed department, and described hollow part equates with the horizontal width of described sealed department.
Further, described valve block is stepped ringwise towards a side of described air-inlet cavity, and the trim ring that described seal ring is set in higher level's ladder and is set in subordinate's ladder presses.
Further, the bottom of described valve body is provided with pressure limiting road, is provided with the pressure limiting device of being partial to the pressure of described air-inlet cavity one side for reducing engine exhaust pipeline in described pressure limiting road.
Further, described pressure limiting device is piston type pressure-limit valve, and the bottom of described valve body is also provided with the pore being communicated with described pressure limiting road, and described pore comprises that air inlet pore and opening that opening is positioned at described air-inlet cavity one side are positioned at described exhaust cavity one side exhaust pore.
Further, the opening of described air inlet pore and exhaust pore is all located at the chamber wall of described inner chamber, and described air inlet pore and exhaust pore are the inclination pore of the described shaft axis of deflection.
Further, the angle that described air inlet pore is partial to described shaft axis with exhaust pore is identical.
The beneficial effects of the utility model: engine exhaust and brake butterfly valve of the present utility model, by the hollow part not contacting with the chamber wall of inner chamber is set on seal ring, make the sealing surface setting of staggering, ensureing that seal ring has the area of contact that reduces itself and inner chamber under the prerequisite of enough width, make seal ring be easy to extrusion-deformation, the operation moment of torsion while keying to reduce valve block, the energy loss of minimizing motor, ensure that valve block opens the flexibility ratio of closing, ensure the normal operation of engine exhaust and brake function; The utility model is simple in structure, easy to use, has highly application value.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the enlarged view at A place in Fig. 1;
Fig. 3 is the enlarged view at B place in Fig. 1.
Embodiment
Fig. 1 is structural representation of the present utility model, Fig. 2 is the enlarged view at A place in Fig. 1, Fig. 3 is the enlarged view at B place in Fig. 1, as shown in the figure: the engine exhaust and brake butterfly valve of the present embodiment, comprise valve body 1, rotating shaft 2, valve block 3 and power mechanism 4, described valve block 3 is fixed in the inner chamber of described valve body 1 by described rotating shaft 2, described valve block 3 is connected with described power mechanism 4, described power mechanism 4 drives described valve block 3 in described inner chamber, to overturn centered by described rotating shaft 2, when described valve block 3 is closed, described inner chamber is separated into air-inlet cavity 51 and exhaust cavity 52, on described valve block 3, be fixed with for forming with the chamber wall of described inner chamber the seal ring 6 being tightly connected, sealing surface between described seal ring 6 and described inner chamber chamber wall is staggered by the hollow part 61 on described seal ring 6, this exhaust brake butterfly valve is preferably eccentric-butterfly-valve, is installed in engine exhaust pipe place, valve body 1 and valve block 3 all adopt resistant to elevated temperatures ductile cast iron material manufacture to form, and its reliability is high, power mechanism 4 is cylinder or vacuum servo cylinder, the piston rod that is provided with piston in it and drives rotating shaft 2 to move, under normal vehicle operation state, the waste gas streams of motor is discharged after exhaust brake butterfly valve, in the time that needs are braked, the control system control power mechanism 4 of vehicle moves, power mechanism 4 is with overturn certain angle make seal ring on valve block 36 form and be tightly connected with valve body 1 inner chamber chamber wall of moving valve plate 3, inner chamber is divided into air-inlet cavity 51 and the exhaust cavity 52 of sealing, the waste gas that motor is discharged is intercepted in air-inlet cavity 51, forms engine exhaust and brake, seal ring 6 ring sets dock to form sealing outside valve block 3 and with inner chamber chamber wall phase shape adaptation, by the hollow part not contacting with the chamber wall of inner chamber is set on seal ring 6, make the sealing surface setting of staggering, ensureing that seal ring 6 has the area of contact that reduces itself and inner chamber under the prerequisite of enough width, make seal ring 6 be easy to extrusion-deformation, operation moment of torsion while keying to reduce valve block 3, reduce the energy loss of motor, ensure 3 flexibility ratios of closing of valve block, ensure the normal operation of engine exhaust and brake function, certainly, seal ring 6 also can directly not contact with the chamber wall of inner chamber, can be provided with to be specifically designed to seal ring 6 to form the stuffing box gland being tightly connected on the wall of chamber.
In the present embodiment, the surface, outer ring of described seal ring 6 forms described hollow part 61 in the mode of part indent; Directly form hollow part 61 from the outer ring concave surface of seal ring 6, be conducive to simplified processing process and keep seal ring 6 intensity; Seal ring 6 is " O " type and is metal o-ring; Hollow part 6 can arrange one, also can arrange multiplely, and its shape does not also limit, as long as can realize the function at sealing surface interval; Part indent, it is with inner chamber chamber wall and seals the sealed department 62 contacting with the part of indent not; As for ratio and the distribution of female parts, need to take into account good sealing effect; Hollow part 61 does not contact with inner chamber chamber wall, but the sealed department 62 of just allowing side is squeezed, Shi Xiangqi distortion, makes seal ring 6 be easy to extrusion-deformation.
In the present embodiment, the outer ring centre of surface indent of described seal ring 6, the longitudinal section of described outer ring is " U " shape, the both sides of described hollow part 61 are sealed department 62, and described hollow part 61 equates with the horizontal width of described sealed department 62; Seal ring 6 surfaces, outer ring are a part for an external conical surface on space, have certain inclination, make the sealing surface of sealed department 62 in the plane of same inclination, are conducive to form be tightly connected; Hollow part 6 is positioned at center, outer ring, and its degree of depth is the half of outer ring width; Hollow part 61 equates with the horizontal width of sealed department 62, is 1/3rd of outer ring width, is convenient to the uniformity that the processing while maintains seal ring 6 to greatest extent.
In the present embodiment, described valve block 3 is stepped ringwise towards a side of described air-inlet cavity 51, and the trim ring 7 that described seal ring 5 is set in higher level's ladder 31 and is set in subordinate's ladder 32 presses; Seal ring 6 is sleeved on higher level's ladder 31, and trim ring 7 is sleeved on subordinate's ladder 32 and contacts with seal ring 6 forming surfaces, and hold-down bolt is fixed on trim ring 7 and seal ring 6 by the fixed hole on trim ring 7 and valve block 3 outer edge of valve block 3; For further Leakage prevention, before being sleeved on higher level's ladder 31, seal ring 6 also must be set with one deck pad; The integral width of seal ring 6 is slightly larger than the bottom width of higher level's ladder 31, and in the process of tightening gradually hold-down bolt, trim ring 7 can produce laterally extruding to seal ring 6 and make its generation resiliently deformable, produces pretightening force.
In the present embodiment, the bottom of described valve body 1 is provided with pressure limiting road 8, is provided with the pressure limiting device of being partial to the pressure of described air-inlet cavity 51 1 sides for reducing engine exhaust pipeline in described pressure limiting road 8; Exhaust brake is to rely on the back pressure producing in air-inlet cavity 51 to realize, because the rotating speed of motor changes within the specific limits, so back pressure is also in constantly changing, along with the raising of engine speed, back pressure is also increasing, and the force value that exceeds motor license will work the mischief to motor itself; Pressure limiting road 8 can be the duct that valve body 1 bottom one is communicated with outlet pipe, has pressure limiting device in it, can in the time that back pressure reaches limit value, make outlet pipe 52 be communicated with, and makes waste gas obtain discharge to regulate pressure, ensures the Security of exhaust brake; The size in pressure limiting road 8 adapts to structure with the shell shape size of valve body 1.
In the present embodiment, described pressure limiting device is piston type pressure-limit valve 9, the bottom of described valve body 1 is also provided with the pore being communicated with described pressure limiting road 8, and described pore comprises that air inlet pore 81 and opening that opening is positioned at described air-inlet cavity 51 1 sides are positioned at described exhaust cavity 52 1 side exhaust pores 82; Pressure limiting road 8 only has an end opening, and opening is towards exhaust cavity 52, and this opening is sealed by spring seat; Piston type pressure-limit valve 9 comprises the piston, spring, the spring seat that connect successively, and its structure is same as the prior art, does not repeat them here; 8 two ends, pressure limiting road are tightly connected with air inlet pore 81, exhaust pore 82 respectively, and air-inlet cavity 51, exhaust cavity 52 are communicated with by pressure-limit valve 9; It is simple in structure, can reach good pressure release effect.
In the present embodiment, the opening of described air inlet pore 81 and exhaust pore 82 is all located at the chamber wall of described inner chamber, and described air inlet pore 81 and exhaust pore 82 are the inclination pore of described rotating shaft 2 axis of deflection; Pore is designed to pore, makes the diameter of axle size in pressure limiting road 8 less, even if machining is poor wayward, valve body 1 also can be guaranteed in the intensity of this part, and saved and manufactured the required raw material of valve body 1, alleviate the weight of valve body 1 to reduce automobile energy consumption, make its motion more smooth; Meanwhile, for straight hole and the inclined hole of same front and back end points, same diameter, the latter's gas transmission path is longer, can ensure the smooth and easy work of pressure limiting device.
In the present embodiment, described air inlet pore 81 is identical with the angle that exhaust pore 72 is partial to described rotating shaft 2 axis; Same angle of inclination pore both facilitated batch process, also can maintain to greatest extent the degree of balance on valve body 1 both sides.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (8)
1. an engine exhaust and brake butterfly valve, comprise valve body, rotating shaft, valve block and power mechanism, described valve block is fixed on by described rotating shaft in the inner chamber of described valve body, described valve block is connected with described power mechanism, described power mechanism drives described valve block in described inner chamber, to overturn centered by described rotating shaft, when described valve block is closed, described inner chamber is separated into air-inlet cavity and exhaust cavity, on described valve block, be fixed with for forming with the chamber wall of described inner chamber the seal ring being tightly connected, it is characterized in that: the sealing surface between described seal ring and described inner chamber chamber wall is staggered by the hollow part on described seal ring.
2. engine exhaust and brake butterfly valve according to claim 1, is characterized in that: the surface, outer ring of described seal ring forms described hollow part in the mode of part indent.
3. engine exhaust and brake butterfly valve according to claim 2, it is characterized in that: the outer ring centre of surface indent of described seal ring, the longitudinal section of described outer ring is " U " shape, the both sides of described hollow part are sealed department, and described hollow part equates with the horizontal width of described sealed department.
4. engine exhaust and brake butterfly valve according to claim 3, is characterized in that: described valve block is stepped ringwise towards a side of described air-inlet cavity, and the trim ring that described seal ring is set in higher level's ladder and is set in subordinate's ladder presses.
5. according to the engine exhaust and brake butterfly valve described in any one in claim 1 to 4, it is characterized in that: the bottom of described valve body is provided with pressure limiting road, in described pressure limiting road, be provided with the pressure limiting device of being partial to the pressure of described air-inlet cavity one side for reducing engine exhaust pipeline.
6. engine exhaust and brake butterfly valve according to claim 5, it is characterized in that: described pressure limiting device is piston type pressure-limit valve, the bottom of described valve body is also provided with the pore being communicated with described pressure limiting road, and described pore comprises that air inlet pore and opening that opening is positioned at described air-inlet cavity one side are positioned at described exhaust cavity one side exhaust pore.
7. engine exhaust and brake butterfly valve according to claim 6, is characterized in that: the opening of described air inlet pore and exhaust pore is all located at the chamber wall of described inner chamber, and described air inlet pore and exhaust pore are the inclination pore of the described shaft axis of deflection.
8. engine exhaust and brake butterfly valve according to claim 7, is characterized in that: the angle that described air inlet pore is partial to described shaft axis with exhaust pore is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773445.4U CN203626972U (en) | 2013-11-29 | 2013-11-29 | Engine exhaust brake butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320773445.4U CN203626972U (en) | 2013-11-29 | 2013-11-29 | Engine exhaust brake butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626972U true CN203626972U (en) | 2014-06-04 |
Family
ID=50813458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320773445.4U Withdrawn - After Issue CN203626972U (en) | 2013-11-29 | 2013-11-29 | Engine exhaust brake butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615325A (en) * | 2013-11-29 | 2014-03-05 | 东风小康汽车有限公司重庆分公司 | Engine exhaust brake butterfly valve |
-
2013
- 2013-11-29 CN CN201320773445.4U patent/CN203626972U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615325A (en) * | 2013-11-29 | 2014-03-05 | 东风小康汽车有限公司重庆分公司 | Engine exhaust brake butterfly valve |
| CN103615325B (en) * | 2013-11-29 | 2016-03-23 | 东风小康汽车有限公司重庆分公司 | Engine exhaust and brake butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140604 Effective date of abandoning: 20160323 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |