CN201155354Y

CN201155354Y - Engine exhaust manifold

Info

Publication number: CN201155354Y
Application number: CNU2008200040206U
Authority: CN
Inventors: 王丽玲
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2008-02-02
Filing date: 2008-02-02
Publication date: 2008-11-26
Anticipated expiration: 2018-02-02

Abstract

The utility model discloses an engine exhaust manifold, comprising a pipe wall; the pipe wall sequentially comprises an external layer, a middle layer and an internal layer from the exterior to the interior; the middle layer is an insulated material layer which is a fibreglass layer. The engine exhaust manifold can effectively resist the heat energy of the exhausted gas to be diffused onto the surface of the exhaust manifold, overcome the shortages of the existing air exhaust and heat insulation system and improve the performance of the engine.

Description

A kind of enmgine exhaust

Technical field

The utility model belongs to technical field of automobile engine, particularly a kind of enmgine exhaust.

Background technique

During engine operation, the high-temp waste gas of discharging raises the outlet pipe surface temperature, proper functioning and safety for motor, prevent that thermal radiation infringement other component of motor and high temperature from may cause the injury to human body, following method commonly used is carried out heat insulation processing to outlet pipe: 1, for preventing that thermal radiation infringement other component of motor and high temperature from may cause the injury to human body, vehicular engine adopts the method that increases exhaust pipe shield on gas exhaust manifold to come outlet pipe is carried out heat insulation processing more, the method complex structure, and exhaust pipe shield is arranged will take the engine arrangement space, this kind system is the semi-open-type system, effect of heat insulation is undesirable, and exhaust pipe shield is thin-walled parts, easily produces vibration noise in engine working process.

2, many water-cooled exhaust gas of outlet pipe pipe of marine engine.Because ship has sufficient water source supply under sail, so the employing water-cooling method of most of so far marine engine outlet pipes cooling, this outlet pipe adopts cast iron (steel) double-layer tube wall structure, cooling water can be taken away the heat that the gas exhaust manifold inwall distributes rapidly and keep the outer tube wall temperature not too high, therefore can reduce ship storehouse temperature, the shortcoming of this method is: gas exhaust manifold quality volume is big, the cost height, double-deck cast iron tube complex structure, the foundry engieering difficulty is big, and yield rate is on the low side, thereby the cost of water-cooling exhaust pipe is improved, a large amount of marine engines adopt supercharging technology, do work with gas of combustion, increase power output, but using under the water-cooling exhaust pipe condition, cooling water is taken away most of waste-gas heat, and engine exhaust temperature is reduced, cause the working efficiency of pressurized machine to descend, thereby engine thermal efficiency is descended.

Summary of the invention

The utility model has overcome deficiency of the prior art, a kind of good heat-insulation effect is provided, occupies little space, cost is low, and can effectively improve the enmgine exhaust of engine efficiency.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of enmgine exhaust is provided, has comprised tube wall, described tube wall comprises skin, mesosphere and internal layer from outside to inside successively, and described mesosphere is an insulation material layer.

Described insulation material layer is a glass fibre layer.

Described internal layer adopts the Stainless Steel Tube behind the shaped by fluid pressure to be welded, and its thickness is 0.8mm～1.2mm.Skin is welded after adopting the thick corrosion resistant plate impact briquetting of 1.5～3.0mm.

Described mesosphere is formed by the clearance space between described internal layer and the described skin, and its thickness is more than or equal to 5mm.

Compared with prior art, the beneficial effects of the utility model are:

1, obviously improves equipment operating environment;

2, reduce distributing of exhausting heat energy significantly, reduce exhaust resistance, improved the exhaust energy utilization ratio;

3, improve the output power of motor, reduce oil consumption;

4, reduced discharging, pollution controls environment;

5, compact structure, light weight, the resistant to rust ability is strong;

6, manufacturing and maintenance cost have been reduced.

Description of drawings

Fig. 1 is the sectional view of the utility model enmgine exhaust;

In above-mentioned figure: the 1-skin; The 2-mesosphere; The 3-internal layer.

Embodiment

As shown in Figure 1, the utility model enmgine exhaust agent structure mainly is made up of skin 1, mesosphere 2 and internal layer 3 three parts: wherein, outer 1 is exhaust tube wall, adopt thicker corrosion resistant plate manufacturing, be responsible for bearing the power (moment) of engine luggine and the outer pipe fitting generation of gas exhaust manifold.Mesosphere 2 is a thermal-protective coating, and material is thermal-protective materials such as glass fibre, alumina silicate, the main responsible heat that is passed to layer 1 by layer 3 that intercepts.Internal layer 3 is interior air-flow path layer, is the discharge route of engine exhaust, uses the thin-wall stainless steel pipe manufacturer.

The principle of this gas exhaust manifold is: when engine operation, the waste gas of discharging heats up internal layer 3 rapidly by the inwall of internal layer 3, but because the heat-insulation and heat-preservation effect in mesosphere 2, being heated, back internal layer 3 heats are basic only to be exchanged with waste gas, minimum part is delivered on the outer wall layer 1, so the surface temperature of gas exhaust manifold is lower.Simultaneously less because of the waste gas heat loss of energy, the efficient of worm wheel pressure booster is improved, thereby can improve engine performance.

Because of internal layer 3 uses the Stainless Steel Tube manufacturing, compare the cast iron outlet pipe, its runner internal surface is more smooth, so waste gas reduces by the outlet pipe resistance.

Internal layer is an air-flow path, Stainless Steel Tube behind the employing shaped by fluid pressure is welded, material thickness 0.8～1.2mm, runner is smooth, and exhaust resistance is little, and the two halves shell welded after impact briquetting about the corrosion resistant plate that the outer 1.5～3.0mm of employing is thick divided, inside and outside two-layer interval is not less than 5mm, middle with thermoinsulation material (glass fibre etc.) filling, because the heat-blocking action in mesosphere, the exhaust tube wall temperature can remain on below 2000 ℃.And the maximum ga(u)ge of this gas exhaust manifold internal and external layer addition is 4.2mm, adds the weight of thermal-protective coating, and the existing plain cast iron gas exhaust manifold of Guan Chongyu is suitable.This model utility is used in and can prevents on the car machine that the gas exhaust manifold thermal radiation from damaging other component, can remove the installation exhaust pipe shield from, has simplified exhaust system structure.On marine engine, can replace existing water-cooling exhaust pipe, alleviate marine engine weight, improve engine thermal efficiency.

It should be noted that at last: above embodiment only in order to the explanation the utility model and and the described technological scheme of unrestricted the utility model; Therefore, although this specification has been described in detail the utility model with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model; And all do not break away from the technological scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the claim scope of the present utility model.

Claims

1, a kind of enmgine exhaust comprises tube wall, it is characterized in that: described tube wall comprises skin, mesosphere and internal layer from outside to inside successively, and described mesosphere is an insulation material layer.

2, enmgine exhaust according to claim 1 is characterized in that: described adiabator layer is a glass fibre layer.

3, enmgine exhaust according to claim 1 is characterized in that: described internal layer adopts the Stainless Steel Tube behind the shaped by fluid pressure to be welded, and its thickness is 0.8mm～1.2mm.

4, enmgine exhaust according to claim 3 is characterized in that: skin is welded after adopting the thick corrosion resistant plate impact briquetting of 1.5～3.0mm.

5, enmgine exhaust according to claim 4 is characterized in that: described mesosphere is formed by the clearance space between described internal layer and the described skin, and its thickness is more than or equal to 5mm.