JP3296061B2 - Turbine housing lagging cover - Google Patents

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, there is a case in which heat insulation is performed by covering a particularly high-temperature turbine housing with a cover.

FIGS. 12 to 14 show a conventional turbine housing lagging cover. The heat insulating material 1 is cut into a substantially rectangular shape in accordance with the peripheral surface of a scroll portion of the turbine housing and wrapped with a heat-resistant cloth 2. A heat-resistant cloth 3 cut into a spiral shape that fits to both end faces 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 putting the cover main body 4 on the turbine housing and tightening the belt 5 corresponding to each buckle 6.

[0004]

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

That is, the three-dimensionally formed cover body 4 is
Adhesion to the turbine housing is low, and the position shift is likely to occur due to the vibration of the turbine housing.

[0006] The three-dimensional cover body 4 takes time and effort to manufacture.

SUMMARY OF THE INVENTION An object of the present invention is to provide a turbine housing lagging cover which can be easily manufactured in view of the above-mentioned circumstances and which can improve adhesion to a turbine housing.

[0008]

According to the present invention, there is provided a cover body in which a heat insulating member having a heat insulating material and a shape retaining layer is formed in a substantially rectangular shape capable of covering the peripheral surface and both end surfaces of a scroll portion of a turbine housing. And a wire attached near both ends of the cover body.

[0009]

The operation of the present invention is as follows.

[0010] If the peripheral surface and both end surfaces of the scroll portion of the turbine housing are covered with a strip-shaped heat-insulating cover body, and wires attached near both ends of the cover body are tied, the shape holding layer forms the cover body. The cover body is attached to the scroll part of the turbine housing simply and with good adhesion because the cover body is held in close contact with the shape along the turbine housing.

[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 material 7 made of a heat resistant cloth made of a glass cloth or a glass cloth coated with aluminum foil, a heat insulating material 8 such as glass wool, and an inner material 9 similar to the outer material 7
And a cover body 11 made of a heat-insulating member, which is formed by integrating a shape maintaining layer 10 such as a wire mesh from the outside in order.
Is formed in a strip shape having a size that can be covered at one time.

The cover body 11 is formed in a trapezoidal shape in which one end corresponding to the exhaust gas inlet 14 in the scroll portion 13 of the turbine housing 12 has a wide width, and one end is folded back and sewn to one end thereof. A bag-shaped wire passage portion 15 is formed, and a similar bag-shaped wire passage portion 1 extending from the other end to a position just before the one end on both sides.
6 and 17 are formed, and wires 18 to 20 are individually passed through the wire passing portions 15 to 17.

Next, the operation will be described.

The cover body 11 is attached to the turbine housing 12
When the cover body 11 is placed on the turbine housing 12 with the shape retaining layer 10 inside, the cover body 11 is pressed down along the turbine housing 12 as necessary, and then bent. Each of the wires 18 to 20 is strongly drawn down, and as shown in FIG.
Connect both ends of ~ 20.

Then, when the wire 18 is drawn down, the cover body 11 is deformed and adheres to the shape along the turbine housing 12, and the shape retention of the shape retaining layer 10 and the wire 1
It is maintained in close contact with the turbine housing 12 with a drawing force of 8 to 20.

As described above, the cover main body 11 is brought into close contact with the turbine housing 12, so that the cover main body 11 is in a state in which it is hard to be displaced by vibration or the like.

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

By providing a shape retaining layer 10 such as a wire mesh, it is possible to prevent the inner surface material 9 from directly contacting the turbine housing 12 and to provide a heat insulating air between the inner surface material 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 configuration as the above embodiment except that one wire 21 is passed between the wire passing portions 16 and 17. FIG. Equipped,
Similar functions and effects can be obtained.

FIGS. 6 and 7 show a third embodiment of the present invention, in which one ends of wires 19 and 20 passed through wire passages 16 and 17 are crossed and then formed at one end of a cover body 11. Except for taking out from the wire holes 22 and 23 described above, it has the same configuration as that of the above-described embodiment, and the same operation and effect can be obtained.

FIGS. 8 to 10 show a fourth embodiment of the present invention. The above-described embodiment is the same as the above-described embodiment except that a thin metal plate such as an aluminum foil or a stainless steel foil is used as the shape holding layer 24 and the wire holes 25 and 26 formed at both ends of the cover body 11 are directly connected by wires 27 and 29. , And the same operation and effect can be obtained.

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

FIG. 11 shows a fifth embodiment of the present invention.
Except that the wire mesh layer 28 is provided on the outer side of the outer surface material 7 so that even if the outer surface material 7 is torn or damaged, it is possible to prevent the spread of the torn or the like, and to provide a configuration similar to that of the above embodiment. Therefore, the same operation and effect can be obtained.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

[0027]

As described above, according to the turbine housing lagging cover of the present invention, there is an excellent effect that it can be easily manufactured, the adhesion to the turbine housing can be improved, and the displacement can be eliminated. obtain.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of FIG.

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

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

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

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

FIG. 7 is a mounting view of FIG. 6;

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

FIG. 9 is a sectional view of FIG. 8;

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

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

FIG. 12 is an exploded view of a conventional example.

FIG. 13 is an assembled sectional view of FIG.

14 is an assembled perspective view of FIG.

[Explanation of symbols]

 Reference Signs List 8 heat insulating material 10, 24 shape retention layer 11 cover body 12 turbine housing 13 scroll part 18-21, 27 wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F02B 39/00 F01D 25/24 F02C 7/24 F02B 77/11

Claims (1)

(57) [Claims] 1. A cover body in which a heat insulating member having a heat insulating material and a shape retaining layer is formed in a substantially rectangular shape capable of covering a peripheral surface and both end surfaces of a scroll portion of a turbine housing, and a cover body near both ends of the cover body. A turbine housing lagging cover comprising: an attached wire.