CN201277085Y

CN201277085Y - Exhaust manifold

Info

Publication number: CN201277085Y
Application number: CNU2008201668532U
Authority: CN
Inventors: 陆志伟
Original assignee: ZHEJIANG MOTORBACS AUTOPARTS CO Ltd
Current assignee: ZHEJIANG MOTORBACS TECHNOLOGY CO., LTD.
Priority date: 2008-10-23
Filing date: 2008-10-23
Publication date: 2009-07-22
Anticipated expiration: 2018-10-23

Abstract

An exhaust manifold comprises branch pipes and flanges, wherein the branch pipes are provided with gas inlet ends and gas outlet ends, and the flanges are respectively arranged on the gas inlet ends and the gas outlet ends of the branch pipes to connect and mount the exhaust manifold. The exhaust manifold is characterized in that the outer surfaces of the branch pipes are respectively plated with a layer of ceramic. Compared with the prior art, the outer surfaces of the branch pipes of the exhaust manifold are respectively plated with an aluminum oxide ceramic layer under the conventional process, aluminum oxide ceramic materials are extremely stable in histological structure, can not be oxidized under high temperature, and are suitable for being utilized as high-temperature materials because ceramic is high in fusing point, thereby enabling the exhaust manifold plated with aluminum oxide to have extremely strong resisting capacity to acid, alkali, salt and molten non-ferro metals, in addition, the exhaust manifold plated with aluminum oxide is more beautiful in integral appearance, and further increases the processing property of exhaust manifold products.

Description

A kind of gas exhaust manifold

Technical field

The utility model relates to a kind of gas exhaust manifold product, particularly relates to a kind of gas exhaust manifold structure of motor car engine.

Background technique

Because after the burning of the mixed gas in the automobile engine cylinder, scavenge, therefore the cylinder relief opening at automobile is equipped with gas exhaust manifold.In whole toxic emission process, what run at first is exactly gas exhaust manifold, and the effect of gas exhaust manifold can make waste gas produce eddy current in pipeline, can forcibly displace waste gas, and improves exhaust velocity.

Generally take following manufacturing process for the gas exhaust manifold that welding is good: pretreatment → washing → oven dry, the outer surface of gas exhaust manifold does not carry out other processing, but the exhaust gas temperature that motor car engine is discharged improves along with the increase of fuel consumption, and gas exhaust manifold itself will high temperature resistance and oxidative stability, simultaneously, in daily use, gas exhaust manifold is again to be exposed among the air, is subjected to the erosion of materials such as acid, alkali, salt easily, therefore, gas exhaust manifold also needs corrosion resistance preferably.At the problem that above-mentioned gas exhaust manifold is in use run into, also need existing manifold structure is further improved, to adapt to daily Environmental Conditions better.

The model utility content

Technical problem to be solved in the utility model is that a kind of gas exhaust manifold with higher oxidative stability, high temperature resistant and corrosion resistance is provided at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: this gas exhaust manifold includes

Arm has inlet end and outlet side;

Flange is separately positioned on the inlet end and the outlet side of described arm, is used for the connection of gas exhaust manifold;

It is characterized in that: described tube outer surface is coated with one deck pottery.

Consider the cosmetic look of gas exhaust manifold, described pottery is an aluminium oxide, and the thickness of this aluminium oxide coating is that 0.1～0.5mm is good, and at this moment, gas exhaust manifold has corrosion resistance and heat-resisting quantity preferably simultaneously.

Consider the model difference that connects motor, the arm quantity of manifold is corresponding with cylinder, motor of the present utility model is four cylinders, accordingly, described arm has four, the inlet end of each described arm all connects exhaust opening of engine respectively by one or four hole flanges, and it is one the tunnel that the outlet side of each described arm is compiled by an enlarging, and described enlarging links to each other with a single hole flange.

Compared with prior art, advantage of the present utility model is: the gas exhaust manifold under common process props up tube outer surface and plates one deck aluminium oxide, because the Organizational Structure of this stupalith of aluminium oxide is highly stable, not only at room temperature can oxidation, even can oxidation under the high temperature more than 1000 ℃ yet, and ceramic fusing point height, mostly more than 2000 ℃, suitable to high temperature material, thereby make and to be coated with the gas exhaust manifold of aluminium oxide acid, alkali, the non-ferrous metal of salt and fusion all has stronger resistivity, simultaneously have very high oxidative stability again, hot strength is good, creep resisting ability is strong; On the other hand, the arrangement outward appearance of gas exhaust manifold that is coated with aluminium oxide is also more attractive in appearance, has further improved the technology capability of gas exhaust manifold product.

Description of drawings

Fig. 1 is the utility model embodiment's a gas exhaust manifold structural representation.

Fig. 2 is another structural representation of gas exhaust manifold of the utility model embodiment.

Fig. 3 is that A-A shown in Figure 2 is to sectional drawing.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 3, be a preferred embodiment of the present utility model:

Gas exhaust manifold in the present embodiment connects the motor of one four cylinder structure, include four arms 1, wherein, every arm has inlet end and outlet side, the inlet end of every arm 1 all is connected to the cylinder of motor by one or four hole flanges 2, during installation, four hole flanges, 2 faces place the automobile engine exhaust pipe mounting point, penetrate respectively in the flange aperture with bolt, be fixed on the automobile engine cylinder; It is one the tunnel that the outlet side of every arm 1 is then compiled by an enlarging 4, enlarging 4 connects a single hole flange 3 simultaneously, gas exhaust manifold can be connected to the other parts of auto-exhaust system by single hole flange 3, four arms 1 are welded to each other together at the nose end of giving vent to anger, and add that at weld a reinforced sheet is to improve four connection tightness and weld strengths between the arm.So the cylinder of motor car engine can be realized the alternate type exhaust by four arms.

In order to improve the high temperature resistant and corrosion resistance of gas exhaust manifold, outer surface at each root arm 1 also is coated with aluminium oxide 11 (pottery), because the Organizational Structure of pottery is highly stable, not only at room temperature can oxidation, even also can oxidation under the high temperature more than 1000 ℃, thereby make the non-ferrous metal of acid, alkali, salt and fusion is all had stronger resistivity by plating gas exhaust manifold that pottery handles.

On the other hand, the fusing point height of pottery is mostly more than 2000 ℃, creep resisting ability is strong, the suitable high temperature material of doing, and, when thickness of coating t reached 0.1～0.5mm, gas exhaust manifold had corrosion resistance and heat-resisting quantity preferably, made that also the overall appearance of gas exhaust manifold is more attractive in appearance.

Gas exhaust manifold of the present utility model is realized by following process program:

1, pretreatment:

Normally remove grease on the matrix, remove corrosion thing, rust or stain serious on the raw material matrix with wire brush, emery paper and emery cloth etc. with organic solvent.

2., electrochemistry is cleaned:

Electrochemistry is cleaned and is used highly basic as key component, and adds auxiliary agent water glass (sodium silicate).

3, washing:

So that the alkali lye under the rapid middle electrochemistry cleaning of removing previous step is residual.

4, electrochemical etching or employing sandblast (activation):

The strong acid solution short time etch of electrochemical etching general using, the time is within 1 minute; Sandblasting before the plating helps to eliminate the remaining internal stress on surface, or forms pressure stress to improve fatigue, prolongs the working life of product, can do blast with the particles of different sizes that glass, steel ball or different shape and material are made.

5, electroplate:

Tube outer surface at manifold plates aluminium oxide, the thickness t of coating=0.1～0.5mm.

6, oven dry:

Dry after the plating, the process of oven dry helps the evaporation of water molecule in the iron.

In sum, gas exhaust manifold processing technology of the present utility model is: pretreatment → electrochemistry cleaning → washing → electrochemical etching or employing (activation) → plating → oven dry of sandblasting.

Claims

1, a kind of gas exhaust manifold includes

Arm has inlet end and outlet side;

2, gas exhaust manifold according to claim 1 is characterized in that: described pottery is an aluminium oxide, and the thickness of this aluminium oxide coating is 0.1～0.5mm.

3, gas exhaust manifold according to claim 1 and 2, it is characterized in that: described arm has four, the inlet end of each described arm all connects exhaust opening of engine respectively by one or four hole flanges, it is one the tunnel that the outlet side of each described arm is compiled by an enlarging, and described enlarging links to each other with a single hole flange.