CN222416202U - Back pressure valve for exhaust system pipeline - Google Patents
Back pressure valve for exhaust system pipeline Download PDFInfo
- Publication number
- CN222416202U CN222416202U CN202421266013.9U CN202421266013U CN222416202U CN 222416202 U CN222416202 U CN 222416202U CN 202421266013 U CN202421266013 U CN 202421266013U CN 222416202 U CN222416202 U CN 222416202U
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- valve
- valve body
- outer ring
- back pressure
- exhaust system
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- 238000007789 sealing Methods 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910002804 graphite Inorganic materials 0.000 claims description 9
- 239000010439 graphite Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
本实用新型提供一种用于排气系统管路上的背压阀，包括阀体、阀轴、第一弹簧帽；所述阀体的一侧表面设置有第一阀体管部；所述阀轴转动连接于阀体、其一端贯穿于第一阀体管部；所述第一弹簧帽包括第一端盖、第一外圈和第一内圈，所述第一端盖固定连接于第一阀体管部，所述第一端盖外侧折弯形成第一外圈，所述第一端盖内侧折弯形成第一内圈，以使得第一外圈和第一内圈之间形成隐藏空间，所述第一内圈贴合于第一阀体管部；本申请增加与第一阀体管部之间的接触面积，提高第一弹簧帽的焊接精度，同时为扭簧提供隐藏空间。
The utility model provides a back-pressure valve for an exhaust system pipeline, comprising a valve body, a valve shaft, and a first spring cap; a first valve body tube portion is arranged on one side surface of the valve body; the valve shaft is rotatably connected to the valve body, and one end of the valve shaft passes through the first valve body tube portion; the first spring cap comprises a first end cover, a first outer ring and a first inner ring, the first end cover is fixedly connected to the first valve body tube portion, the outer side of the first end cover is bent to form the first outer ring, and the inner side of the first end cover is bent to form the first inner ring, so that a hidden space is formed between the first outer ring and the first inner ring, and the first inner ring is fitted to the first valve body tube portion; the present application increases the contact area with the first valve body tube portion, improves the welding accuracy of the first spring cap, and provides a hidden space for the torsion spring at the same time.
Description
Technical Field
The utility model relates to the technical field of NVH (noise, vibration and harshness) of an automobile exhaust system, in particular to a back pressure valve used on a pipeline of the exhaust system.
Background
At present, the quality of the whole automobile is greatly increased due to the factors of a battery pack, new requirements are put forward on the arrangement of the chassis, an exhaust system cannot be arranged in a wide space like a traditional fuel automobile, the requirement of developing a product capable of replacing noise elimination in the automobile is met under the great background of reducing the volume and cost of the existing automobile exhaust system, and when an engine (a gasoline engine or a diesel engine) of the motor vehicle works, a certain back pressure is generated due to an exhaust pipe, a muffler, an exhaust gas filter and the like in the exhaust system, and the back pressure is generally changed along with the change of the rotating speed of the engine. The back pressure valve has the function of increasing the back pressure of the exhaust system to achieve the effect of noise reduction.
The exhaust system is integrally arranged on the chassis of the automobile, and the failure of the moving part relative to a static structure (inner assembly) in the whole air path system is easy to occur, the service life of the moving part is reduced to the reliability value of the whole system, and if the moving part in the system is damaged or fails, the situation of integral replacement is faced, so that the modularized combination design of the moving part is also required to be researched.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the back pressure valve for the exhaust system pipeline, the structural design of the first spring cap increases the contact area between the first spring cap and the first valve body pipe part, improves the welding precision of the first spring cap, provides a hidden space for the torsion spring, and protects the torsion spring. The technical scheme adopted by the utility model is as follows:
A back pressure valve used on an exhaust system pipeline comprises a valve body, a valve shaft, a valve plate, a first spring cap, a second spring cap and a torsion spring;
A first valve body pipe part is arranged on one side surface of the valve body;
the valve shaft is rotatably connected with the valve body, and one end of the valve shaft penetrates through the first valve body pipe part;
the valve plate is arranged in the valve cavity of the valve body and is fixedly connected with the valve shaft along the axis of the valve shaft;
The first spring cap comprises a first end cover, a first outer ring and a first inner ring, the first end cover is fixedly connected to the first valve body pipe part, the outer side of the first end cover is bent to form a first outer ring, the inner side of the first end cover is bent to form a first inner ring, so that a hidden space is formed between the first outer ring and the first inner ring, and the first inner ring is attached to the first valve body pipe part;
the second spring cap is fixed on the valve shaft;
The torsion spring is positioned in the hidden space, and two pins on the torsion spring are respectively connected with the first spring cap and the second spring cap.
Further, a first opening for inserting pins of the torsion spring is formed in the first end cover.
Further, a pipe part bulge is arranged on the surface of the first valve body pipe part, and the side surface of the first end cover is propped against the pipe part bulge.
Further, the second spring cap comprises a second end cover and a second outer ring, the second end cover is sleeved on the valve shaft and is arranged in parallel with the first end cover, the outer side of the second end cover is bent to form a second outer ring, and the second outer ring covers the end part of the torsion spring.
Further, the axis of the second outer ring and the axis of the first outer ring are respectively overlapped with the axis of the valve shaft, and the diameters of the second outer ring and the first outer ring are the same.
Further, a second opening for inserting pins of the torsion spring is formed in the second outer ring.
Further, one side of the valve body, which is far away from the first valve body pipe part, is provided with a second valve body pipe part, and one end of the valve shaft extends into the second valve body pipe part and is in rotary sealing connection with the valve shaft through a deep groove ball bearing.
Further, a first blocking cover is arranged in the second valve body pipe part.
Further, the first valve body pipe part is in sealing rotary connection with the valve shaft through a sealing check ring bearing, one side of the sealing check ring bearing abuts against a step in the first valve body pipe part, and the other side of the sealing check ring bearing abuts against a shaft shoulder on the valve shaft.
Further, one side of the shaft shoulder of the valve shaft, which is far away from the sealing retainer ring bearing, is provided with a graphite pad, the other side of the graphite pad is provided with a second blanking cover, and the second blanking cover is tightly matched with the pipe part of the first valve body.
The utility model has the advantages that:
The structural design of the first spring cap increases the contact area between the first spring cap and the first valve body pipe part, improves the welding precision of the first spring cap, provides a hidden space for the torsion spring and protects the torsion spring;
The first spring cap and the second spring cap are arranged at intervals and do not contact, so that mutual friction caused by deformation of the torsion spring is avoided, and abrasion of parts is reduced;
The diameters of the first outer ring and the second outer ring are equal, and the die size design of the first spring cap and the second spring cap is simplified.
Drawings
Fig. 1 is a plan view of the present application.
Fig. 2 is a cross-sectional view A-A of fig. 1.
Fig. 3 is a structural view of the first spring cap.
Fig. 4 is a structural view of the second spring cap.
Fig. 5 is an exploded view of the assembly of the valve body, valve shaft and valve plate.
Fig. 6 is a schematic structural view of the present application.
The valve comprises a valve body, a valve body pipe part 110, a valve body pipe part 111, a valve body pipe part 120, a valve shaft 2, a valve plate 3, a first spring cap 4, a first end cover 410, a first outer ring 420, a first inner ring 430, a first opening 440, a second spring cap 5, a second end cover 510, a second outer ring 520, a second opening 530, a torsion spring 6, a deep groove ball bearing 7, a first blocking cover 8, a sealing retainer ring bearing 9, a graphite pad 10 and a second blocking cover 11.
Detailed Description
The present utility model 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 utility model 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 utility model.
Referring to fig. 1-6, the present application provides a back pressure valve for an exhaust system pipeline, which comprises a valve body 1, a valve shaft 2, a valve plate 3, a first spring cap 4, a second spring cap 5, and a torsion spring 6, wherein a first valve body pipe portion 110 is arranged on one side surface of the valve body 1, the valve plate 2 is rotatably connected to the valve body 1, one end of the valve plate penetrates through the first valve body pipe portion 110, the valve plate 3 is arranged in a valve cavity of the valve body 1, the valve plate 3 is fixedly connected with the valve shaft 2 along the axis of the valve shaft 2, the first spring cap 4 comprises a first end cap 410, a first outer ring 420 and a first inner ring 430, the first end cap 410 is fixedly connected to the first valve body pipe portion 110, the outer side of the first end cap 410 is bent to form a first outer ring 420, the inner side of the first end cap 410 is bent to form a first inner ring 430, so that a hiding space is formed between the first outer ring 420 and the first inner ring 430, the first inner ring 430 is attached to the first valve body pipe portion 110, the second spring cap 5 is fixed on the valve body 1, the 6 is positioned in the hiding space, and the pin of the valve shaft 4 is respectively connected to the first spring cap 4 and the second spring cap 4.
It is readily appreciated that exhaust valves have a primary function in automotive engine exhaust system applications to reduce back pressure in the exhaust pipe. Because exhaust gas needs to be discharged from the cylinders during operation of the automobile engine to ensure smooth operation between normal cylinder operations. But the back-flushing wave and pressure generated during the exhaust process generate back pressure in the exhaust pipe, which can negatively affect the efficiency and power performance of the engine, reducing the performance and life of the engine. Therefore, the back pressure valve achieves the purpose of reducing the back pressure by adjusting the back pressure in the pipeline, thereby ensuring that the engine can work normally. Specifically, when the engine runs in a high-load state, the valve plate in the back pressure valve drives the valve shaft to rotate under the action of pressure, so that valve cavities at two sides of the valve plate are communicated, exhaust is completed, back pressure in the exhaust pipe can be effectively reduced, energy loss is reduced, and the power performance of the engine is improved. Meanwhile, the back pressure valve can also improve the low-torque performance of the engine, so that the engine can output enough torque in a low-rotation-speed area.
When the first spring cap 4 is fixed on the first valve body pipe part 110, the first inner ring 430 is matched with the first valve body pipe part 110, so that the inner cylindrical surface of the first inner ring 430 is attached to the outer cylindrical surface of the first valve body pipe part 110, the contact area between the first spring cap 4 and the first valve body pipe part 110 is increased, the coaxiality between the first spring cap 4 and the first valve body pipe part 110 is ensured, then a joint gap between the first end cover 410 and the first valve body pipe part 110 is welded, the first spring cap 4 is fixed, the hidden space is parallel to the torsion spring 6, and the torsion spring 6 is prevented from being blocked.
After the first spring cap 4 is welded and fixed, the torsion spring 6 stretches into the hidden space, one pin of the torsion spring is connected with the first spring cap 4, then the second spring cap 5 is sleeved on the valve shaft 2, the other pin of the torsion spring 6 is connected with the second spring cap 5, and finally the second spring cap 5 is welded and fixed on the valve shaft 2, so that the assembly of the back pressure valve is completed. When the back pressure valve is opened, the valve plate 3 drives the valve shaft 2 to rotate around the axis of the valve shaft under the action of air pressure, the valve cavity of the valve body 1 is communicated with the front and back channels of the valve body 1 to realize exhaust, and meanwhile, the valve shaft 2 drives the second spring cap 5 to rotate, so that the torsion spring 6 generates torsion and air pressure contrast until the pressure is balanced.
In an embodiment, in order to facilitate the quick mounting of the pin of the torsion spring 6 on the first spring cap 4, as shown in fig. 3, a first opening 440 is provided in the first end cover 410 for inserting the pin of the torsion spring 6.
In a specific embodiment, in order to achieve positioning on the first valve body tube 110 before the first spring cap 4 is welded, as shown in fig. 2, a tube protrusion 111 is disposed on a surface of the first valve body tube 110, and a side surface of the first end cover 410 abuts against the tube protrusion 111.
In the present application, as shown in fig. 2 and 4, the second spring cap 5 includes a second end cap 510 and a second outer ring 520, the second end cap 510 is sleeved on the valve shaft 2 and is arranged parallel to the first end cap 410, the outer side of the second end cap 510 is bent to form the second outer ring 520, and the second outer ring 520 covers the end portion of the torsion spring 6.
Specifically, a hole or a groove is formed in the middle of the second end cover 510, which can be matched with the shaft section of the valve shaft 2, the purpose of protecting the torsion spring 6 is achieved by sleeving the second end cover 510 on the valve shaft 2 and covering the other end of the torsion spring 6, then the other pin of the torsion spring 6 is connected with the second spring cap 5, and the second end cover 510 is welded and fixed with the valve shaft 2, so that the second spring cap 5 is installed.
In one embodiment, the axes of the second outer ring 520 and the first outer ring 420 are respectively coincident with the axis of the valve shaft 2, and the diameters of the second outer ring 520 and the first outer ring 420 are the same. The size of the first outer ring 420 and the second outer ring 520 is limited, so that the die size design of the two spring caps is facilitated, the manufacturing cost is reduced, meanwhile, the first outer ring 420 and the second outer ring 520 are opposite but do not contact, the mutual friction between the first spring cap 4 and the second spring cap 5 is avoided, the abrasion is reduced, the opening pressure of the valve plate 3 is completely borne by the torsion spring 6, and the test between the torque and the valve opening pressure is also facilitated.
Further, in order to facilitate the fast mounting of the leg of the torsion spring 6 on the second spring cap 5, the second outer ring 520 is provided with a second opening 530 through which the leg of the torsion spring 6 is inserted.
In the application, as shown in fig. 2, in order to complete the rotary connection between the valve shaft 2 and the valve body 1 on the basis of the structure of avoiding the valve plate 3, a second valve body pipe part 120 is arranged on one side of the valve body 1 away from the first valve body pipe part 110, and one end of the valve shaft 2 extends into the second valve body pipe part 120 and is in rotary sealing connection with the valve shaft 2 through a deep groove ball bearing 7.
In addition, the valve shaft 2 can drive other parts to be influenced by variable load under the frequent impact of air flow in the exhaust pipe of the exhaust system, and the deep groove ball bearing 7 can reduce the influence.
Further, a first plug 8 is disposed in the second valve body pipe 120. The first blocking cover 8 is plugged into the second valve body pipe part 120 and is tightly matched with the inner cylindrical surface of the second valve body pipe part 120, the deep groove ball bearing 7 is blocked in the second valve body pipe part 120, and the tightness of the valve shaft 2 is ensured.
In the application, as shown in fig. 2, the first valve body pipe part 110 is in sealing and rotating connection with the valve shaft 2 through a sealing retainer ring bearing 9, one side of the sealing retainer ring bearing 9 abuts against a step in the first valve body pipe part 110, and the other side abuts against a shaft shoulder on the valve shaft 2. The sealing rings are additionally arranged on two sides of the sealing retainer ring bearing 9, specifically, the deep groove ball bearing, so that the sealing effect can be further improved.
One side of the shaft shoulder of the valve shaft 2 far away from the sealing retainer ring bearing 9 is provided with a graphite pad 10, the other side of the graphite pad 10 is provided with a second blocking cover 11, and the second blocking cover 11 is tightly matched with the first valve body pipe part 110. When the valve is used, the outer circular surface of the graphite gasket 10 is in interference fit with the inner circular surface of the second valve body pipe part 120, and the inner circular surface can move relatively with the valve shaft 2, so that the sealing defect is overcome by utilizing the sealing retainer ring bearing 9, and the graphite gasket 10 is further plugged by tightly matching the second plug cover 11 with the second valve body pipe part 120, so that the sealing property of the valve shaft 2 is ensured.
In an embodiment, as shown in fig. 5, the valve cavity in the valve body 1 is matched with the valve plate 3, the upper side of the valve cavity is rectangular, the lower side of the valve cavity is arc-shaped, and the top of the valve plate 3 is connected with the valve shaft 2, so that the valve plate 3 is fully opened in the valve cavity when the valve shaft 2 rotates, the rotating space of the valve plate 3 is not limited, the opening angle of the valve plate 3 is increased under larger impact pressure, and the valve plate 3 is prevented from being damaged.
In conclusion, the application has the effects of facilitating welding and positioning and protecting the torsion spring, no interference exists between the two spring caps, and the back pressure valve is opened stably.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model 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 utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.
Claims (10)
1. The back pressure valve for the exhaust system pipeline is characterized by comprising a valve body (1), a valve shaft (2), a valve plate (3), a first spring cap (4), a second spring cap (5) and a torsion spring (6);
a first valve body pipe part (110) is arranged on one side surface of the valve body (1);
The valve shaft (2) is rotatably connected with the valve body (1), and one end of the valve shaft penetrates through the first valve body pipe part (110);
The valve plate (3) is arranged in the valve cavity of the valve body (1), and the valve plate (3) is fixedly connected with the valve shaft (2) along the axis of the valve shaft (2);
The first spring cap (4) comprises a first end cover (410), a first outer ring (420) and a first inner ring (430), wherein the first end cover (410) is fixedly connected to the first valve body pipe part (110), the outer side of the first end cover (410) is bent to form the first outer ring (420), the inner side of the first end cover (410) is bent to form the first inner ring (430), so that a hidden space is formed between the first outer ring (420) and the first inner ring (430), and the first inner ring (430) is attached to the first valve body pipe part (110);
the second spring cap (5) is fixed on the valve shaft (2);
the torsion spring (6) is positioned in the hidden space, and two pins on the torsion spring are respectively connected with the first spring cap (4) and the second spring cap (5).
2. The back pressure valve for use on an exhaust system line of claim 1, wherein:
The first end cover (410) is provided with a first opening (440) for inserting pins of the torsion spring (6).
3. The back pressure valve for an exhaust system pipe according to claim 1, wherein a pipe portion protrusion (111) is provided on a surface of the first valve body pipe portion (110), and a side surface of the first end cap (410) abuts against the pipe portion protrusion (111).
4. The back pressure valve for an exhaust system pipeline according to claim 1, wherein the second spring cap (5) comprises a second end cover (510) and a second outer ring (520), the second end cover (510) is sleeved on the valve shaft (2) and is arranged in parallel with the first end cover (410), the outer side of the second end cover (510) is bent to form the second outer ring (520), and the second outer ring (520) covers the end part of the torsion spring (6).
5. The back pressure valve for an exhaust system pipe according to claim 4, wherein an axis of the second outer ring (520) and an axis of the first outer ring (420) are coincident with an axis of the valve shaft (2), respectively, and diameters of the second outer ring (520) and the first outer ring (420) are the same.
6. The back pressure valve for an exhaust system pipe according to claim 4, wherein the second outer ring (520) is provided with a second opening (530) through which a pin of the torsion spring (6) is inserted.
7. The back pressure valve for exhaust system pipes according to any one of claims 1 to 6, characterized in that a second valve body pipe part (120) is arranged on one side of the valve body (1) far away from the first valve body pipe part (110), and one end of the valve shaft (2) extends into the second valve body pipe part (120) and is in rotary sealing connection with the valve shaft (2) through a deep groove ball bearing (7).
8. The back pressure valve for an exhaust system pipe according to claim 7, wherein a first plug (8) is provided in the second valve body pipe portion (120).
9. The back pressure valve for an exhaust system pipeline according to claim 7, wherein the first valve body pipe part (110) is in sealing rotary connection with the valve shaft (2) through a sealing check ring bearing (9), and one side of the sealing check ring bearing (9) is abutted against a step in the first valve body pipe part (110) and the other side is abutted against a shaft shoulder on the valve shaft (2).
10. The back pressure valve for the exhaust system pipeline according to claim 8, wherein a graphite pad (10) is arranged on one side, far away from the sealing retainer ring bearing (9), of the shaft shoulder of the valve shaft (2), a second blocking cover (11) is arranged on the other side of the graphite pad (10), and the second blocking cover (11) is tightly matched with the first valve body pipe part (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421266013.9U CN222416202U (en) | 2024-06-05 | 2024-06-05 | Back pressure valve for exhaust system pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421266013.9U CN222416202U (en) | 2024-06-05 | 2024-06-05 | Back pressure valve for exhaust system pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222416202U true CN222416202U (en) | 2025-01-28 |
Family
ID=94347385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421266013.9U Active CN222416202U (en) | 2024-06-05 | 2024-06-05 | Back pressure valve for exhaust system pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222416202U (en) |
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2024
- 2024-06-05 CN CN202421266013.9U patent/CN222416202U/en active Active
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