阅读说明：本技术 一种dpf筒体组件密封结构 (DPF cylinder body assembly sealing structure ) 是由 潘健 张翌 陈艺鹏 郭鑫 刘浩 陈军 卫小兵 许单军 于 2019-04-10 设计创作，主要内容包括：本发明提供一种DPF筒体组件密封结构,包括前筒体、DPF筒体、密封圈和V型抱箍,前筒体与DPF筒体相近的一侧进行轴向定位和径向配合,前筒体靠近DPF筒体的一侧呈带直边的弧形,前筒体与DPF筒体之间夹设有密封圈,前筒体与DPF筒体的连接处上方通过V型抱箍配合密封。本发明减少多出漏气点,改善漏气问题,节约成本,增加了DPF筒体组件对径向震动的抵御能力。(The invention provides a DPF cylinder assembly sealing structure which comprises a front cylinder, a DPF cylinder, a sealing ring and a V-shaped hoop, wherein one side of the front cylinder close to the DPF cylinder is axially positioned and radially matched, one side of the front cylinder close to the DPF cylinder is arc-shaped with straight edges, the sealing ring is clamped between the front cylinder and the DPF cylinder, and the upper part of the connection part of the front cylinder and the DPF cylinder is matched and sealed through the V-shaped hoop. The invention reduces more air leakage points, improves the air leakage problem, saves the cost and increases the resistance of the DPF cylinder assembly to radial vibration.)

1. The utility model provides a DPF barrel subassembly seal structure, its characterized in that, includes preceding barrel (1), DPF barrel (2), sealing washer (3) and V type staple bolt 4, axial positioning and radial cooperation are carried out to one side that preceding barrel (1) are close with DPF barrel (2), one side that preceding barrel (1) is close to DPF barrel (2) is the arc of taking the straight flange, it is equipped with sealing washer (3) to press from both sides between preceding barrel (1) and DPF barrel (2), V type staple bolt (4) cooperation is passed through to preceding barrel (1) and DPF barrel 2's junction top.

2. The DPF cartridge assembly sealing structure of claim 1, wherein: one side of the front cylinder body (1) close to the DPF cylinder body (2) sequentially comprises an a section (11) and a b section (12), the a section (11) is an inverted V-shaped flanging, the b section (12) is a straight edge, and the b section is located above the front cylinder body (1).

3. The DPF cartridge assembly sealing structure of claim 2, wherein: one side that DPF barrel (2) are close to preceding barrel (1) includes c section (21), d section (22) and e section (23) in proper order, c section (21), d section (22) and e section (23) are the echelonment to DPF barrel (2) outside direction, d section (22) are a straight side, draw together c section (21) and e section (23) and be the hypotenuse of the same orientation preceding barrel (1) one side in direction.

4. The DPF cartridge assembly sealing structure of claim 3, wherein: the b section (12) and the d section (22) are matched with each other and arranged in parallel, and the e section (23) is parallel to the inclined plane of the a section (11) close to one side of the DPF cylinder body (2).

5. The DPF cartridge assembly sealing structure of claim 4, wherein: the sealing ring (3) is made of iron-based graphite sheets.

6. The DPF cartridge assembly sealing structure of claim 5, wherein: the thickness of the iron-based graphite sheet is 2 mm.

7. The DPF cartridge assembly sealing structure of claim 6, wherein: openings at two ends of the DPF cylinder body (2) are respectively provided with a c section (21), a d section (22) and an e section (23).

Technical Field

The invention mainly relates to the field of tail gas aftertreatment structure design, in particular to a DPF cylinder assembly sealing structure.

Background

Diesel engines typically use catalytic mufflers to reduce harmful substances in the engine exhaust. With the limitation of particulate matters in the exhaust emission of diesel vehicles, the diesel particulate filter DPF is applied to a catalytic muffler on a large scale. The DPF captures particles through a filtering device with mixed surfaces and inner parts, can effectively purify 70% -90% of particles in exhaust, and is the most effective and direct method for purifying particles of a diesel engine. However, as the particulate matter in the DPF increases, causing excessive exhaust backpressure, the vehicle may initiate a regeneration process that burns the carbon particulates and hydrocarbons trapped in the DPF at high temperatures. Since incombustible ash exists in the particulate matters, the cylinder assembly for packaging the DPF is designed to be detachable so that the cylinder assembly for packaging the DPF can be detached for ash removal treatment after 80000 km. The existing commonly used disassembly and assembly structure is that a barrel flanging process is adopted, the two ends of a barrel for packaging the DPF and the barrel matched with the two ends of the barrel are both turned into bevel edges, and a V-shaped sealing ring and a V-shaped hoop are matched for sealing.

There are the following disadvantages:

the air leakage at the locking part of the V-shaped clamp is slightly large, and because the regeneration temperature of the DPF is over 600 ℃, after long-time accumulation, high temperature can damage surrounding components;

the V-shaped sealing ring is large in thickness and made of iron-based graphite, the conventional raw material of the V-shaped sealing ring is 2mm thick, the iron-based graphite used for flanging is 14mm thick, the material is soft, and the machining performance is poor, so that the V-shaped sealing ring is high in cost;

3. only the bevel edge of the cylinder body is matched with the V-shaped flanging of the hoop to resist radial vibration, the V-shaped sealing ring is soft and thick, and more importantly, the installation hoop is fixed on the cylinder body in front of and behind the DPF cylinder body assembly when the catalytic muffler is installed on a vehicle. Thus, the strength of the DPF assembly against radial vibration is low when the vehicle is in operation.

Published chinese utility model patent, application No. CN201620846236.1, patent name: diesel particulate filter assembly, filing date: 20160808, the invention relates to a diesel particle filter assembly, which comprises a cylinder, and upper and lower conical end covers arranged at two ends of the cylinder, wherein the upper and lower conical end covers are respectively connected with the cylinder through upper and lower trapezoidal hoops, the middle parts of the upper and lower trapezoidal hoops are respectively provided with an upper and a lower sealing gaskets, and the inner wall of the cylinder is provided with a liner layer. The invention has the advantages of simple structure and convenient disassembly and replacement. The conical end cover and the cylinder body can be conveniently separated, the cylinder body is not influenced by the shape of the end cover, the universality is improved, the cylinder body part needs to be frequently dismounted and weighed in the calibration process of the diesel particle filter assembly, the structure can improve the dismounting convenience of the diesel particle filter assembly and improve the measurement accuracy; meanwhile, the sealing effect of the cylinder body and the conical end cover can be effectively guaranteed by a structure formed by a sealing gasket and a trapezoidal hoop in a pressing mode.

Disclosure of Invention

The invention provides a DPF cylinder component sealing structure, which aims at the defects of the prior art and comprises a front cylinder 1, a DPF cylinder 2, a sealing ring 3 and a V-shaped hoop 4, wherein one side of the front cylinder 1 close to the DPF cylinder 2 is axially positioned and radially matched, one side of the front cylinder 1 close to the DPF cylinder 2 is in an arc shape with a straight edge, the sealing ring 3 is clamped between the front cylinder 1 and the DPF cylinder 2, and the upper part of the connection part of the front cylinder 1 and the DPF cylinder 2 is matched and sealed through the V-shaped hoop 4.

Preferably, one side of the front cylinder 1 close to the DPF cylinder 2 sequentially comprises an a section 11 and a b section 12, the a section 11 is an inverted V-shaped flanging, the b section 12 is a straight edge, and the b is located above the front cylinder 1.

Preferably, one side of the DPF cylinder 2 close to the front cylinder 1 sequentially comprises a c section 21, a d section 22 and an e section 23, the c section 21, the d section 22 and the e section 23 are in a step shape towards the outside direction of the DPF cylinder 2, the d section 22 is a straight side, and the c section 21 and the e section 23 are both inclined sides facing towards one side of the front cylinder 1 in the same direction.

Preferably, the b section 12 and the d section 22 are mutually matched and arranged in parallel, and the e section 23 is parallel to the inclined surface of the a section 11 at the side close to the DPF cylinder 2.

Preferably, the seal ring 3 is made of iron-based graphite sheet.

Preferably, the iron-based graphite sheet has a thickness of 2 mm.

Preferably, the openings at both ends of the DPF cylinder 2 are provided with a c section 21, a d section 22 and an e section 23.

The invention has the beneficial effects that:

1. the number of air leakage points is reduced, and the air leakage problem is improved;

2. the standard 2mm sealing ring is used, the cost of a single sealing ring is reduced to 6 percent of the original cost, and the cost is saved;

3. because the front and the rear cylinders are in radial fit when connected, the resistance of the DPF cylinder assembly to radial vibration is increased, and the radial fit point is designed at the air leakage point, so that the air leakage measured by the existing structure is reduced by seven.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is an enlarged schematic view of point A in FIG. 1;

FIG. 3 is a prior art block diagram;

FIG. 4 is an enlarged schematic view of point B in FIG. 3;

in the figure, the position of the upper end of the main shaft,

1. front cylinder, 11, a section, 12, b section; 2. DPF cylinder, 21, c section, 22, d section, 23 and e section; 3. a seal ring; 4. a V-shaped hoop; 5. v-shaped sealing ring.

Detailed Description

As shown in fig. 1 to 4, the present invention includes: preceding barrel 1, DPF barrel 2, sealing washer 3 and V type staple bolt 4, axial positioning and radial cooperation are carried out to one side that preceding barrel 1 is close with DPF barrel 2, one side that preceding barrel 1 is close to DPF barrel 2 is the arc of straight flange, it is equipped with sealing washer 3 to press from both sides between preceding barrel 1 and the DPF barrel 2, the junction top of preceding barrel 1 and DPF barrel 2 is sealed through the cooperation of V type staple bolt 4.

When in use, the flanging of the arc-shaped front barrel 1 is matched with the DPF barrel 2, so that one matching in the prior art is reduced, and air leakage points are reduced; in addition, the front cylinder body 1 with the straight edge is axially positioned and radially matched with the left end of the DPF cylinder body 2, and a section of matching is added before the air leakage point, so that the air leakage rate is greatly reduced.

In this implementation, preferably, one side of the front cylinder 1 close to the DPF cylinder 2 sequentially includes an a section 11 and a b section 12, the a section 11 is an inverted V-shaped flange, the b section 12 is a straight edge, and the b is located above the front cylinder 1.

In this embodiment, it is preferable that the DPF cylinder 2 includes a c-section 21, a d-section 22, and an e-section 23 in order on a side close to the front cylinder 1, the c-section 21, the d-section 22, and the e-section 23 are stepped toward an outer side of the DPF cylinder 2, the d-section 22 is a straight side, and the c-section 21 and the e-section 23 are both inclined sides having the same direction toward the front cylinder 1.

By the arrangement of the structure, the front cylinder body 1 and the DPF cylinder body 2 are optimized, and when the cylinder body is spun, a group of straight-edge d sections 22 are additionally arranged on the left side and are used for being axially positioned and radially matched with the straight-edge d sections 22 of the front cylinder body 1.

In the present embodiment, the b-segment 12 and the d-segment 22 are preferably arranged in parallel with each other, and the e-segment 23 is parallel to the inclined surface of the a-segment 11 on the side close to the DPF cylinder 2.

After axial positioning, the DPF cylinder assembly and the front and rear cylinder assemblies are higher in coaxiality, and the product quality is greatly improved.

After radial cooperation, DPF barrel subassembly and the radial movement of front and back barrel subassembly are by better suppression, in addition the cooperation of the hypotenuse of original hypotenuse a section 11 and V type staple bolt 4 for the DPF barrel subassembly radial vibration amplitude that novel structure recorded in the vibrations laboratory is only original 30%.

In the present embodiment, it is preferable that the seal ring 3 is made of an iron-based graphite sheet.

Preferably, in this embodiment, the iron-based graphite sheet has a thickness of 2 mm.

Because the sealing ring with the original structure not only needs to use 14mm iron-based graphite sheets, but also needs to carry out the processing technology of V-shaped bevel edges at two sides after blanking. The 14mm iron-based graphite sheet is very soft and cannot be processed easily, so that the processing cost of the V-shaped bevel edges on two sides is very high.

Set up above-mentioned structure, whole structure inner seal circle 3 is by great simplification, can directly use the 2mm iron-based graphite flake of punching press blanking. The iron-based graphite flakes after stamping and blanking are softer, and after the iron-based graphite flakes are added between the front barrel 1 and the DPF barrel 2, the iron-based graphite flakes are locked by the V-shaped hoop 4 and naturally deform to be attached to two surfaces for sealing. Because the graphite gasket thickness of new construction reduces greatly, the volume of deformation also reduces greatly, and direct the increase DPF barrel subassembly resists the ability that vibrations warp. The price of the sealing ring is only 6 percent of the original price. One catalytic muffler uses 2 sealing rings, greatly reduced the cost.

In this embodiment, preferably, the opening at both ends of the DPF cylinder 2 is provided with a c-section 21, a d-section 22, and an e-section 23.

By adopting the structure, the sealing scheme in the prior art is replaced, the sealing quality is integrally improved, the radial movement is inhibited, and the radial vibration amplitude is reduced.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.