CN116792537A - Exhaust passive valve for muffler inner assembly - Google Patents
Exhaust passive valve for muffler inner assembly Download PDFInfo
- Publication number
- CN116792537A CN116792537A CN202310772023.3A CN202310772023A CN116792537A CN 116792537 A CN116792537 A CN 116792537A CN 202310772023 A CN202310772023 A CN 202310772023A CN 116792537 A CN116792537 A CN 116792537A
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- Prior art keywords
- valve body
- valve
- shaft
- end plate
- exhaust
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- 230000000712 assembly Effects 0.000 claims abstract description 19
- 238000000429 assembly Methods 0.000 claims abstract description 19
- 238000013016 damping Methods 0.000 claims description 45
- 238000007789 sealing Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 description 5
- 239000000306 component Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004200 deflagration Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
- F16K27/0227—Check valves or pivoted valves with the valve members swinging around an axis located at the edge of or outside the valve member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/01—Damping of valve members
- F16K47/012—Damping of valve members by means of a resilient damping element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K2200/00—Details of valves
- F16K2200/30—Spring arrangements
- F16K2200/302—Plurality of biasing means, e.g. springs, for opening or closing single valve member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust Silencers (AREA)
Abstract
The application provides an exhaust passive valve for an inner assembly of a muffler, which comprises a valve body, a concentric shaft, a valve cover, a pre-tightening assembly and a rotating shaft, wherein the valve body is provided with a valve seat; the valve body comprises a valve body end plate part and a valve body pipe part, the valve body end plate part is arranged at one end of the valve body pipe part, a valve body hook part is outwards arranged at the edge of the valve body end plate part in an extending mode, and an opening rotation space is formed in the valve body hook part; the concentric shaft penetrates through the rotating space and can rotate along the axis of the concentric shaft; the valve cover is positioned on one side surface of the valve body end plate part, and the edge of the valve cover extends into the rotating space and is fixedly connected with the concentric shaft; the pre-tightening components are respectively arranged at two ends of the hook part of the valve body, and two ends of the concentric shaft are respectively connected with the pre-tightening components; the rotating shaft is parallel to the concentric shaft, and two ends of the rotating shaft are fixedly connected with the two pre-tightening assemblies respectively; the application solves the problems that a single elastic element cannot well play a role in balance, is easy to lose efficacy after long-time work, and causes axial deviation of a rotating part and clamping stagnation between moving parts.
Description
Technical Field
The application relates to the technical field of NVH (noise, vibration and harshness) of an exhaust system, in particular to an exhaust passive valve for an inner assembly of a muffler.
Background
The exhaust passive valve is used as a core component of the automobile noise elimination unit and plays an important role in the control process of middle and low frequency noise. Along with the gradual market occupation of hybrid vehicles, the exhaust silencing system is gradually affected by the boundary of the chassis of the vehicle, and the whole vehicle develops towards the volume reduction direction, so that the development work of a passive valve replacing silencing volume is attracting more and more attention.
Existing internal assembly exhaust passive valves use a single elastic element (spring or torsion spring) to effect switching of the on-off state of the valve;
in the actual use process, the single elastic element cannot well play a role in balancing, and is easy to lose efficacy after long-time work, so that the axial deviation of the rotating part is caused, and the clamping stagnation phenomenon between moving parts is more easily caused;
because the variation of the deflagration airflow in the engine can cause unstable airflow pulses (each has characteristics under the condition of small, medium and large flow) in the whole exhaust system, moving parts (valve covers) in the exhaust valve are easy to generate tremble with certain frequency along with the airflow under the impact of the unstable airflows, so that corresponding abnormal sound is generated in the noise elimination system, and the subjective evaluation of a vehicle and the noise sound pressure level index are influenced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application provides the exhaust passive valve for the assembly in the muffler, which has the advantages of good coaxiality of rotating parts, good freedom of elastic elements and good balance and consistency of double-side pretightening force. The technical scheme adopted by the application is as follows:
an exhaust passive valve for a muffler assembly, comprising
The valve body comprises a valve body end plate part and a valve body pipe part, the valve body end plate part is arranged at one end of the valve body pipe part, a valve body hook part is outwards arranged at the edge of the valve body end plate part in an extending mode, and an opening rotation space is formed in the valve body hook part;
the concentric shaft penetrates through the rotating space and can rotate along the axis of the concentric shaft;
the valve cover is positioned on one side surface of the valve body end plate part, and the edge of the valve cover extends into the rotating space and is fixedly connected with the concentric shaft, so that the valve cover is opened or closed on one side of the valve body end plate part;
the pre-tightening assemblies are respectively arranged at two ends of the hook part of the valve body, and two ends of the concentric shaft are respectively connected with the pre-tightening assemblies to provide pre-tightening force for the valve cover;
and
the rotating shaft is arranged parallel to the concentric shaft, and two ends of the rotating shaft are fixedly connected with the two pre-tightening assemblies respectively;
the axis of the concentric shaft and the axis of the rotating shaft are respectively perpendicular to the axis of the valve body pipe part.
Further, the pre-tightening assembly comprises a shaft support, a torsion spring and a chuck;
the shaft support is fixed at one end of the valve body hook part, and the chuck is fixed on the central shaft;
the torsion spring is sleeved on the central shaft, one pin of the torsion spring is fixed on the rotating shaft, and the other pin of the torsion spring is fixed on the chuck;
the axial clearance is respectively arranged between the torsion spring and the shaft support and between the torsion spring and the chuck.
Further, a plurality of torsion spring clamping holes for inserting pins of the torsion springs are uniformly distributed on the end face of the chuck, a plurality of torsion spring clamps Kong Wei are round, and the circle center of the torsion spring clamping holes is located on the axis of the concentric shaft.
Further, the two ends of the valve body hook part are respectively contracted inwards to form a containing groove, and the shaft support is arranged in the containing groove.
Further, the end face of the shaft support protrudes outwards to form a protruding part, a concentric shaft hole for inserting a concentric shaft is arranged in the middle of the protruding part, a bearing is arranged on the inner side of the protruding part, and the bearing is sleeved on the concentric shaft; and/or the number of the groups of groups,
and a rotating shaft hole for inserting the rotating shaft is formed in the end face of the shaft support.
Further, the device also comprises two damping components, wherein the two damping components are respectively arranged on the inner sides of the two pre-tightening components;
the damping assembly comprises a damping spring and a damping sheet, the damping spring is arranged on the concentric shaft, and the damping sheet is propped against the end face of the shaft support by the elastic force of the damping spring.
Further, the concentric shaft comprises a middle section, shaft shoulders, edge sections and edge section grooves, wherein the shaft shoulders are respectively arranged at two ends of the middle section, the edge sections are arranged at the other ends of the shaft shoulders, and the edge section grooves extend towards the shaft shoulders along the other ends of the edge sections;
the valve cover is connected to the middle section, the damping spring is sleeved on the edge section and is positioned between the shaft shoulder and the damping fin, and one pin of the damping spring is inserted into the groove of the edge section.
Further, the valve body further comprises a valve body diaphragm part which is arranged at the other end of the valve body pipe part, so that the gas flowing to the valve body pipe part along the axial direction is blocked by the valve body diaphragm part and flows to the circumferential direction of the valve body pipe part;
the cylindrical surface of the valve body pipe part is uniformly provided with a plurality of valve body pipe openings, and gas passing through the circumference of the valve body pipe part enters the valve body pipe part from the valve body pipe openings and finally flows out from the valve body end plate openings on the valve body end plate part.
Further, a valve body extension is provided at one circumferential edge of the valve body end plate, and the valve cover is located inside the valve body extension.
Further, a sealing gasket is arranged between the valve body end plate and the valve cover, and the sealing gasket is fixedly connected with the valve body end plate.
The application has the advantages that:
1. the rotating part uses the concentric shaft and the rotating shaft, the coaxiality is good, when the pre-tightening assemblies on the two sides are matched with the concentric shaft to balance torsion, the consistency of the initial pre-tightening angles of the two torsion springs can be ensured, the torsion value shared to each torsion spring is reduced to some extent, and the service life of the exhaust passive valve for the assembly in the muffler is prolonged;
2. the axial gaps on the two sides of the torsion spring enable the axial displacement generated by the rotation of the torsion spring not to generate clamping stagnation, and the elasticity characteristic of the torsion spring can be fully exerted;
3. the damping component can strengthen the anti-air flow interference capability of the rotating piece;
4. through setting up valve body diaphragm portion and realizing keeping out the wind and changing the air current direction, the unstable air current of weakening produces inhomogeneous impact to the valve gap, avoids the vibration that unstable air current directly impacted the valve gap to lead to, eliminates the inside corresponding abnormal sound that produces of noise elimination system.
Drawings
Fig. 1 is a radial cross-sectional view of the present application.
FIG. 2 is a block diagram of the present application with the valve cover removed.
Fig. 3 is a structural view of the valve body of the present application.
Fig. 4 is an assembly view of the present application.
Fig. 5 is a structural view of the shaft support of the present application.
Fig. 6 is a plan view of concentric shaft 20 of the present application.
FIG. 7 is a schematic view of the air flow direction when the valve cover of the present application is opened.
In the figure: 10-valve body, 20-concentric shaft, 30-valve cap, 40-pretension assembly, 50-spindle, 60-damper assembly, 70-air flow guide, 80-sealing gasket, 110-valve body end plate portion, 110 a-valve body end plate opening, 120-valve body tube portion, 120 a-valve body tube opening, 130-valve body diaphragm portion, 140-valve body hook portion, 150-rotation space, 160-valve body extension, 210-intermediate section, 220-shoulder, 230-edge section, 240-edge section groove, 410-shaft support, 410 a-protrusion, 410 b-concentric shaft hole, 410 c-spindle hole, 420-torsion spring, 430-chuck, 430 a-torsion spring clamping hole, 440-bearing, 610-damper spring, 620-damper.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Referring to fig. 1-3, the present application provides an exhaust passive valve for a muffler inner assembly, comprising a valve body 10, a concentric shaft 20, a valve cover 30, a pre-tightening assembly 40, and a rotating shaft 50; the valve body 10 comprises a valve body end plate part 110 and a valve body pipe part 120, wherein the valve body end plate part 110 is arranged at one end of the valve body pipe part 120, a valve body hook part 140 is outwards arranged at the edge of the valve body end plate part 110 in an extending manner, and an open rotating space 150 is formed in the valve body hook part 140; the concentric shaft 20 penetrates through the rotation space 150 and can rotate along its own axis; the valve cover 30 is located at one side of the valve body end plate 110, and the edge of the valve cover 30 extends into the rotation space 150 and is fixedly connected with the concentric shaft 20, so that the valve cover 30 is opened or closed at one side of the valve body end plate 110; the pre-tightening assemblies 40 are respectively arranged at two ends of the valve body hook 140, and two ends of the concentric shaft 20 are respectively connected with the pre-tightening assemblies 40 to provide pre-tightening force for the valve cover 30; the rotating shaft 50 is arranged parallel to the concentric shaft 20, and two ends of the rotating shaft are fixedly connected to the two pre-tightening assemblies 40 respectively; wherein, the axis of the concentric shaft 20 and the axis of the rotating shaft 50 are perpendicular to the axis of the valve body tube 120, respectively.
The pretension assembly 40 includes a shaft holder 410, a torsion spring 420, and a chuck 430; the shaft support 410 is fixed at one end of the valve body hook 140, and the chuck 430 is fixed on the central shaft 20; the torsion spring 420 is sleeved on the central shaft 20, one pin of the torsion spring 420 is fixed on the rotating shaft 50, and the other pin of the torsion spring 420 is fixed on the chuck 430; wherein, axial gaps are respectively arranged between the torsion spring 420 and the shaft support 410 and between the torsion spring 420 and the chuck 430; in order to rotatably connect concentric shaft 20 with shaft support 410, bearing 440 is installed between concentric shaft 20 and shaft support 410.
In one embodiment, as shown in fig. 4, the passive valve body end plate 110 is welded to the airflow guide 70 before use, the airflow guide 70 is welded to the pipe or the partition inside the muffler, and the diameter of the airflow guide 70 is larger than the diameter of the valve body pipe 120; or directly welding the pipe to the valve body end plate 110, the pipe diameter being larger than the diameter of the valve body pipe 120 (not shown); the valve body end plate 110 is welded and fixed with the valve body pipe 120, the valve body hook 140 and the valve body end plate 110 are integrally formed, the valve body end plate 110 is circular, the plane of the valve body end plate 110 is perpendicular to the axis of the valve body pipe 120, so that the concentric shaft 20 and the rotating shaft 50 are parallel to the valve body end plate 110, the valve body hook 140 extends along the left-right direction, and the valve body pipe 120 extends along the front-back direction; during assembly, the shaft support 410 is welded and fixed at the left end and the right end of the valve body hook 140, and the chuck 430 is welded and fixed on the concentric shaft 20, so that the concentric shaft 20 ensures the coaxiality of the left torsion spring 420 and the right torsion spring 420, the left stress and the right stress of the valve cover 30 are uniform, and particularly deformation during mounting of the bearing 440 and the shaft support 410 can be avoided, and abnormal noise of the passive valve caused by torsion unbalance at the two ends is avoided.
Because the axial gap is reserved, the torsion spring 420 generates elastic deformation in the rotation process of the concentric shaft 20, at the moment, the axial elongation of the torsion spring 420 cannot generate clamping stagnation, and the elastic characteristic of the torsion spring 420 can be better exerted.
As shown in fig. 2, a plurality of torsion spring clamping holes 430a for inserting pins of the torsion spring 420 are uniformly distributed on the end surface of the chuck 430, and a plurality of torsion spring clamping holes 430a are enclosed into a circle, and the center of the circle is located on the axis of the concentric shaft 20.
When the pre-tightening torques at the left and right sides of the valve cover 30 are very different, the torque imbalance at the left and right ends of the passive valve is caused, and the passive valve is abnormal, so that the pins of the torsion springs 420 at the left and right sides are inserted into the corresponding torsion spring clamping holes 430a on the two chucks 430, the pre-tightening reference angles can be unified, and the consistency of the pre-tightening torques is ensured.
As shown in fig. 2 and 3, the two ends of the valve hook 140 are respectively contracted inward to form the receiving groove 140a, and the shaft holder 410 is disposed in the receiving groove 140 a.
The valve body hook 140 not only provides a rotation space for the valve cover 30 and avoids mutual interference of moving parts, but also provides a hiding space for the concentric shaft 20, thereby facilitating welding positioning of the two shaft supports 410, achieving three-in-one, having high structural strength and reducing production cost.
By providing the receiving groove 140a having a shape matching that of the shaft holder 410, the welding positioning between the shaft holder 410 and the valve body hook 140 is facilitated without considering the welding positioning between the concentric shaft 20 and the valve body 10, thereby not depending on the accuracy of the welding apparatus excessively.
As shown in fig. 1 and 5, the end surface of the shaft support 410 protrudes outwards to form a protruding portion 410a, a concentric shaft hole 410b for inserting the concentric shaft 20 is provided in the middle of the protruding portion 410a, a bearing 440 is provided inside the protruding portion 410a, and the bearing 440 is sleeved on the concentric shaft 20; the protruding part 410a not only reserves an installation space for the bearing 440, but also facilitates its positioning; the shaft holder 410 is provided with a shaft hole 410c for inserting the shaft 50.
In order to avoid the interference of the movement between the parts, the rotation shaft 50 is disposed at the upper side of the concentric shaft 20 higher than the valve body hook 140.
As an embodiment of the present application, the bearing 440 is a powder metallurgy bearing, and due to the wear-resistant property of the bearing, the wear degree after long-time working is ensured to be small, and the service life is long; in addition, lubricating grease can be smeared on the surface of the powder metallurgy bearing to reduce friction.
As shown in fig. 1, the present application further includes two damping assemblies 60, and the two damping assemblies 60 are respectively disposed at the inner sides of the two pre-tightening assemblies 40; the damping assembly 60 comprises a damping spring 610 and a damping sheet 620, wherein the damping spring 610 is arranged on the concentric shaft 20, and the damping sheet 620 is propped against the end surface of the shaft support 410 by the elastic force of the damping spring 610; by providing the damping assembly 60 to provide a certain damping force when the valve cover 30 is opened or has an opening tendency, valve cover shake caused by air flow fluctuation is reduced to a certain extent.
As shown in fig. 1 and 6, the concentric shaft 20 includes a middle section 210, a shoulder 220, an edge section 230 and an edge section groove 240, wherein the two ends of the middle section 210 are respectively provided with the shoulder 220, the other end of the shoulder 220 is provided with the edge section 230, and the edge section groove 240 extends towards the shoulder 220 along the other end of the edge section 230;
specifically, the valve cover 30 is connected to the middle section 210, the damping spring 610 is sleeved on the edge section 230 and is located between the shaft shoulder 220 and the damping fin 620, and one pin of the damping spring 610 is inserted into the groove 240 of the edge section.
The shaft shoulder 220 plays a role in positioning, so that the installation and positioning of adjacent components are facilitated, one pin of the damping spring 610 is clamped in the edge section groove 240 to realize synchronous rotation with the concentric shaft 20, and accordingly positive pressure of the damping fin 620 is increased, static friction force generated when the concentric shaft 20 rotates is increased, and the air flow interference resistance of the valve cover 30 is enhanced.
In addition, referring to fig. 3 and 7, the valve body 10 of the present application further includes a valve body diaphragm part 130, the valve body diaphragm part 130 being disposed at the other end of the valve body pipe part 120 such that gas flowing in an axial direction toward the valve body pipe part 120 is blocked by the valve body diaphragm part 130 and flows in a circumferential direction of the valve body pipe part 120;
a plurality of valve body pipe openings 120a are uniformly distributed on the cylindrical surface of the valve body pipe 120, and the gas passing through the circumference of the valve body pipe 120 enters the valve body pipe 120 from the valve body pipe openings 120a and finally flows out from the valve body end plate openings 110a on the valve body end plate 110.
It should be noted that the shape of the valve body pipe opening 120a is not limited to the present application, and may be circular, square, oval or triangular.
As an embodiment of the present application, the axial cross-section of the valve body diaphragm portion 130 is arc-shaped, and the arc center thereof faces the valve body end plate portion 110, so that the valve body diaphragm portion 130 with different radians can be selected according to different engine powers; therefore, when the unstable air flow in the pipeline blows from back to front, the valve body diaphragm part 130 disperses the air flow to the peripheral surface of the valve body pipe part 120, and then enters the valve body pipe part 120 along the valve body pipe opening 120a, which can greatly reduce the interference of the unstable air flow to the valve cover 30 and reduce the probability of vibration.
As shown in fig. 3 and 4, one circumferential edge of the valve body end plate 110 is provided with a valve body extension 160, and the valve cover 30 is positioned inside the valve body extension 160.
The movement track of the valve cover 30 is limited by the valve body extension 160, so that the possibility of left and right swinging of the valve cover 30 is further reduced, the valve cover 30 is protected from being damaged, and the flowing gas is guided in a drainage way.
In order to improve the sealing effect of the passive valve when the valve cover 30 is closed, a sealing gasket 80 is arranged between the valve body end plate 110 and the valve cover 30, and the sealing gasket 80 is fixedly connected with the valve body end plate 110.
As an embodiment of the present application, the sealing gasket 80 is a wire-wound gasket.
Working principle:
when air flows from the air flow guide 70 to the passive valve, since the damping assemblies 60 are installed at the left and right sides of the valve cover 30, the torsion springs 420 in the pre-tightening assembly 40 have poor air flow compression performance under the condition of small air flow, so that the damping springs 610 in the damping assemblies 60 act at the moment, when the valve cover 30 is opened forwards or has a forward opening direction and the concentric shaft 20 has a rotating trend, the damping springs 610 have a rotating trend along with the mandrel 20 according to the fact that the pins of the damping springs 610 are inserted into the edge section grooves 240, so that the positive pressure acting on the damping sheets 620 is increased, thereby increasing the static friction force between the damping sheets 620 and the shaft support 410 when the concentric shaft 20 rotates, controlling the shaking of the valve cover 30 and enhancing the air flow interference resistance of the valve cover 30;
the torsion springs at the left side and the right side of the valve cover 30 achieve the effect of balancing torsion force, the two ends of the valve cover 30 are uniformly stressed under the effect of the concentric shaft 20, the reference angles of the pretightening force of the torsion springs 420 are consistent, and the consistency of pretightening torsion force is ensured;
when unstable airflow pulse is caused in the whole exhaust system due to the change of deflagration airflow in the engine, the valve body diaphragm part 130 plays a role, the airflow is blocked by the valve body diaphragm part 130 and dispersed to the circumference of the valve body pipe part 120, enters the valve body pipe part 120 along the valve body pipe opening 120a, finally passes through the valve body end plate opening 110a, and pushes the valve cover 30 to discharge the valve body 10, so that the vibration caused by the unstable airflow directly impacting the valve cover 30 is avoided, the corresponding abnormal sound generated in the noise elimination system is eliminated, and the subjective evaluation and noise sound pressure level index of the vehicle are met.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present application.
Claims (10)
1. An exhaust passive valve for a muffler inner assembly, characterized by: comprising
The valve body (10) comprises a valve body end plate part (110) and a valve body pipe part (120), wherein the valve body end plate part (110) is arranged at one end of the valve body pipe part (120), a valve body hook part (140) is outwards arranged at the edge of the valve body end plate part (110), and an open rotary space (150) is formed in the valve body hook part (140);
a concentric shaft (20) which penetrates through the rotation space (150) and can rotate along the axis thereof;
the valve cover (30) is positioned on one side surface of the valve body end plate part (110), and the edge of the valve cover (30) extends into the rotating space (150) and is fixedly connected with the concentric shaft (20) so that the valve cover (30) is opened or closed on one side of the valve body end plate part (110);
the pre-tightening assemblies (40) are respectively arranged at two ends of the valve body hook part (140), and two ends of the concentric shaft (20) are respectively connected with the pre-tightening assemblies (40) to provide pre-tightening force for the valve cover (30);
and
a rotating shaft (50) arranged parallel to the concentric shaft (20) and having both ends fixedly connected to the two pre-tightening assemblies (40), respectively;
wherein the axis of the concentric shaft (20) and the axis of the rotating shaft (50) are respectively perpendicular to the axis of the valve body pipe part (120).
2. The exhaust passive valve for an in-muffler assembly according to claim 1, wherein: the pretension assembly (40) includes a shaft mount (410), a torsion spring (420), and a chuck (430);
the shaft support (410) is fixed at one end of the valve body hook part (140), and the chuck (430) is fixed on the central shaft (20);
the torsion spring (420) is sleeved on the central shaft (20), one pin of the torsion spring (420) is fixed on the rotating shaft (50), and the other pin of the torsion spring (420) is fixed on the chuck (430);
wherein, axial clearance is respectively arranged between the torsion spring (420) and the shaft support (410) and between the torsion spring (420) and the chuck (430).
3. The exhaust passive valve for an in-muffler assembly according to claim 2, wherein: a plurality of torsion spring clamping holes (430 a) for inserting pins of the torsion springs (420) are uniformly distributed on the end face of the chuck (430), a plurality of torsion spring clamping holes (430 a) are enclosed into a circle, and the circle center of the torsion spring clamping holes is located on the axis of the concentric shaft (20).
4. The exhaust passive valve for an in-muffler assembly according to claim 2, wherein: the two ends of the valve body hook part (140) are respectively contracted inwards to form a containing groove (140 a), and the shaft support (410) is arranged in the containing groove (140 a).
5. The exhaust passive valve for an in-muffler assembly according to claim 2, wherein: the end face of the shaft support (410) protrudes outwards to form a protruding part (410 a), a concentric shaft hole (410 b) for inserting the concentric shaft (20) is arranged in the middle of the protruding part (410 a), a bearing (440) is arranged on the inner side of the protruding part (410 a), and the bearing (440) is sleeved on the concentric shaft (20); and/or the number of the groups of groups,
the end face of the shaft support (410) is provided with a rotating shaft hole (410 c) for inserting the rotating shaft (50).
6. The exhaust passive valve for an in-muffler assembly according to any one of claims 2 to 5, wherein: the device further comprises two damping assemblies (60), wherein the two damping assemblies (60) are respectively arranged on the inner sides of the two pre-tightening assemblies (40);
the damping assembly (60) comprises a damping spring (610) and a damping sheet (620), wherein the damping spring (610) is arranged on the concentric shaft (20), and the damping sheet (620) is abutted against the end face of the shaft support (410) by the elastic force of the damping spring (610).
7. The exhaust gas passive valve for an in-muffler assembly according to claim 6, wherein: the concentric shaft (20) comprises a middle section (210), a shaft shoulder (220), an edge section (230) and an edge section groove (240), wherein the shaft shoulder (220) is respectively arranged at two ends of the middle section (210), the edge section (230) is arranged at the other end of the shaft shoulder (220), and the edge section groove (240) extends towards the shaft shoulder (220) along the other end of the edge section (230);
the valve cover (30) is connected to the middle section (210), the damping spring (610) is sleeved on the edge section (230) and is located between the shaft shoulder (220) and the damping fin (620), and one pin of the damping spring (610) is inserted into the groove (240) of the edge section.
8. The exhaust passive valve for an in-muffler assembly according to any one of claims 2 to 5, wherein: the valve body (10) further comprises a valve body diaphragm part (130), wherein the valve body diaphragm part (130) is arranged at the other end of the valve body pipe part (120) so that gas flowing to the valve body pipe part (120) along the axial direction is blocked by the valve body diaphragm part (130) and flows in the circumferential direction of the valve body pipe part (120);
a plurality of valve body pipeline openings (120 a) are uniformly distributed on the cylindrical surface of the valve body pipe part (120), and gas passing through the valve body pipe part (120) in the circumferential direction enters the valve body pipe part (120) from the valve body pipeline openings (120 a) and finally flows out from the valve body end plate openings (110 a) on the valve body end plate part (110).
9. The exhaust gas passive valve for an in-muffler assembly according to claim 8, wherein: a valve body extension (160) is arranged at one circumferential edge of the valve body end plate (110), and the valve cover (30) is positioned on the inner side of the valve body extension (160).
10. The exhaust passive valve for an in-muffler assembly according to claim 1, wherein: a sealing gasket (80) is arranged between the valve body end plate (110) and the valve cover (30), and the sealing gasket (80) is fixedly connected with the valve body end plate (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772023.3A CN116792537A (en) | 2023-06-28 | 2023-06-28 | Exhaust passive valve for muffler inner assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310772023.3A CN116792537A (en) | 2023-06-28 | 2023-06-28 | Exhaust passive valve for muffler inner assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116792537A true CN116792537A (en) | 2023-09-22 |
Family
ID=88043546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310772023.3A Pending CN116792537A (en) | 2023-06-28 | 2023-06-28 | Exhaust passive valve for muffler inner assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116792537A (en) |
-
2023
- 2023-06-28 CN CN202310772023.3A patent/CN116792537A/en active Pending
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