JPH07189725A - Lagging cover for turbine housing - Google Patents

Abstract

PURPOSE:To enable easy manufacture, improve adhesion to a turbine housing and prevent dislocation. CONSTITUTION:The peripheral surface and both end faces in the scroll part 13 of a turbine housing 12 are covered with a strip heat-insulating cover body 11, and wires 18, 19 fitted to the vicinity of both end parts of the cover body 11 are tied. A shape holding layer thereby holds and sticks the cover body 11 into the shape along the turbine housing 12, so that the cover body 11 can be mounted to the scroll part 13 of the turbine housing 12 easily with desirable adhesion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine housing lagging cover.

[0002]

2. Description of the Related Art In a turbocharger, a turbine housing, which has a particularly high temperature, is sometimes covered with a cover so as to be insulated.

FIGS. 12 to 14 show a conventional turbine housing lagging cover, in which a heat insulating material 1 is cut into strips and wrapped with a heat resistant cloth 2 in accordance with the peripheral surface of the scroll portion of the turbine housing. , A scroll-shaped heat-resistant cloth 3 that fits both end surfaces of the scroll portion is sewn together to form a three-dimensional cover body 4, and a belt 5 and a buckle 6 are attached to both ends of each heat-resistant cloth 3, 3 respectively. The cover main body 4 is fixed to the turbine housing by covering the turbine housing with the cover main body 4 and tightening the belts 5 corresponding to the respective buckles 6 by tightening.

[0004]

However, the above-mentioned conventional turbine housing lagging cover has the following problems.

That is, the three-dimensionally formed cover body 4 is
It has low adhesion to the turbine housing and is easily displaced due to vibration of the turbine housing.

Further, the three-dimensional cover body 4 takes time to manufacture.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a turbine housing lagging cover which can be easily manufactured to improve the adhesion to the turbine housing.

[0008]

According to the present invention, a heat insulating member having a heat insulating material and a shape retaining layer is formed into a substantially strip-shaped cover body capable of covering the peripheral surface and both end surfaces of a scroll portion of a turbine housing, According to another aspect of the present invention, there is provided a turbine housing lagging cover, the wire being attached to both ends of the cover body.

[0009]

The operation of the present invention is as follows.

The strip-shaped heat-insulating cover main body covers the peripheral surface and both end surfaces of the scroll portion of the turbine housing, and if wires attached near both ends of the cover main body are connected, the shape-retaining layer forms the cover main body. The cover body is attached to the scroll portion of the turbine housing easily and with good adhesion because the shape is held along the turbine housing and brought into close contact therewith.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention.

An outer surface material 7 made of a heat-resistant cloth made of glass cloth or glass cloth coated with aluminum foil, a heat insulating material 8 such as glass wool, and an inner surface material 9 similar to the outer surface material 7.
And a shape-maintaining layer 10 such as a wire mesh are sequentially integrated from the outside to provide a cover body 11 made of a heat insulating member, and the cover body 11 is provided with a scroll portion 13 of the turbine housing 12.
The peripheral surface and both end surfaces are formed in a strip shape having a size capable of being covered at once.

The cover body 11 is formed in a trapezoidal shape in which one end side corresponding to the exhaust gas intake port 14 in the scroll portion 13 of the turbine housing 12 has a wide width, and one end portion thereof is folded back and sewn. The bag-shaped wire passing portion 15 is formed, and the same bag-shaped wire passing portion 1 extending from the other end side to the front side of the one end side is formed on both sides.
6 and 17 are formed, and the wires 18 to 20 are separately passed through the wire passing portions 15 to 17, respectively.

Next, the operation will be described.

The cover body 11 is attached to the turbine housing 12
In the case of attaching the cover body 11 to the turbine housing 12 with the shape-retaining layer 10 inside, the cover body 11 is pressed and bent along the turbine housing 12 if necessary, Firmly squeeze each of the wires 18 to 20, and as shown in FIG.
Tie the ends of ~ 20 together.

Then, when the wire 18 is drawn, the cover body 11 is deformed into a shape along the turbine housing 12 and comes into close contact therewith, so that the shape-retaining property of the shape-retaining layer 10 and the wire 1 are retained.
It is kept in close contact with the turbine housing 12 by a drawing force of 8 to 20.

As described above, the cover body 11 is brought into close contact with the turbine housing 12 so that the position is less likely to be displaced due to vibration or the like.

Moreover, the strip-shaped cover body 11 is easy to manufacture.

By providing the shape-retaining layer 10 such as a wire mesh, it is possible to prevent the inner surface member 9 from directly contacting the turbine housing 12, and at the same time, to provide heat insulating air between the inner surface member 9 and the turbine housing 12. The effect that a layer can be formed is also obtained.

FIGS. 4 and 5 show a second embodiment of the present invention, which has the same construction as the above embodiment except that one wire 21 is inserted between the wire passage portions 16 and 17. Is equipped with
Similar actions and effects can be obtained.

FIGS. 6 and 7 show a third embodiment of the present invention, which is formed at one end of the cover body 11 after intersecting one ends of the wires 19 and 20 passed through the wire passing portions 16 and 17. The structure is the same as that of the above-described embodiment except that the wire is taken out from the wire passage holes 22 and 23, and the same action and effect can be obtained.

8 to 10 show a fourth embodiment of the present invention. A metal thin plate such as an aluminum foil or a stainless steel foil is used as the shape-retaining layer 24, and the wire through holes 25 and 26 formed at both ends of the cover body 11 are directly connected by the wires 27 and 29. It has the same configuration as the above and can obtain the same operation and effect.

Further, according to the present embodiment, since the metal thin plate such as aluminum foil or stainless steel foil, which has better adhesion than the wire mesh, is used, both ends of the cover body 11 are directly connected to the wire 2.
Even if they are tied with 7, 29, it is possible to sufficiently prevent the displacement.

FIG. 11 shows the fifth embodiment of the present invention.
A wire mesh layer 28 is provided on the outer side of the outer surface material 7, and even if the outer surface material 7 is torn or damaged, it is possible to prevent expansion such as tearing and the like, and is provided with the same configuration as in the above embodiment. Therefore, the same action and effect can be obtained.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0027]

As explained above, according to the turbine housing lagging cover of the present invention, the turbine housing lagging cover can be easily manufactured, the adhesion to the turbine housing can be improved, and the displacement can be eliminated. obtain.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG.

3 is a mounting view of FIG. 1. FIG.

FIG. 4 is a plan view of the second embodiment of the present invention.

5 is a mounting view of FIG. 4. FIG.

FIG. 6 is a plan view of a third embodiment of the present invention.

FIG. 7 is a mounting view of FIG.

FIG. 8 is a plan view of the fourth embodiment of the present invention.

9 is a cross-sectional view of FIG.

10 is a mounting view of FIG. 8. FIG.

FIG. 11 is a sectional view of a fifth embodiment of the present invention.

FIG. 12 is a component development view of a conventional example.

FIG. 13 is an assembled sectional view of FIG.

14 is an assembled perspective view of FIG. 12. FIG.

[Explanation of symbols]

 8 Heat Insulating Material 10,24 Shape Retaining Layer 11 Cover Main Body 12 Turbine Housing 13 Scroll Part 18-21,27 Wire

Claims (1)

[Claims] 1. A cover main body in which a heat insulating member having a heat insulating material and a shape-retaining layer is formed in a substantially strip shape capable of covering the peripheral surface and both end surfaces of a scroll portion of a turbine housing, and in the vicinity of both end portions of the cover main body. A turbine housing lagging cover, comprising: an attached wire.