JP5257768B2 - Insulation cover - Google Patents

Description

  The present invention relates to a heat insulating cover attached to a housing having a scroll portion.

  In an exhaust turbine turbocharger installed in a large internal combustion engine such as a marine diesel engine, there is a possibility that a person may touch a turbine housing or a compressor housing that becomes hot. Therefore, the surface temperature of a part that a person may touch is predetermined. A heat insulating cover is attached so as to be below the value.

  As an example of a conventional heat insulating cover, there is the following Patent Document 1, for example. FIG. 5 is a view showing a heat insulating cover described in Patent Document 1. As shown in FIG. The heat insulating cover is formed by joining an outer peripheral portion 31 formed in accordance with the peripheral surface of the scroll portion of the housing and two end surface portions 32, 32 formed in a spiral shape matching both end surfaces of the scroll portion by sewing or fork rings. Thus, a three-dimensional cover body 31 is formed, and a belt 33 and a buckle 34 are respectively attached to both end portions of each end surface portion 32. Each of the outer peripheral portion 31 and each end surface portion 32 has a structure in which a heat insulating material is housed in a bag made of a heat-resistant cloth. The heat insulating cover is attached to the housing by covering the housing with the cover main body 31 and tightening it through a belt corresponding to each buckle 34.

JP-A-7-189725 (paragraph 0003, FIGS. 12 to 14)

  In the above conventional heat insulating cover, since the heat insulating material does not enter the stitched portion between the portions 31 and 32 constituting the cover, and locally thins, the heat insulating performance of the stitched portion is the other part (heat insulating material is contained). There is a problem that the temperature becomes higher than that of the other part) and the temperature becomes higher.

  This invention is made | formed in view of said problem, and makes it a subject to improve the heat insulation performance in the stitching | suture part of the site | parts which comprise a heat insulation cover.

In order to solve the above problems, the heat insulating cover of the present invention employs the following technical means.
(1) The present invention is a heat insulating cover attached to a housing having a scroll portion, and includes a cover main body that covers the scroll portion of the housing, and the cover main body has a range extending from the outer peripheral surface of the scroll portion to one side end surface. It consists of a first part to cover and a second part covering the range from the outer peripheral surface of the scroll part to the other side end face, and the outer peripheral edges of the first part and the second part are stitched together, and the first part and the second part A cover main body is formed so as to form an air layer between the stitched portion and the outer peripheral surface of the scroll portion.

  According to said structure, the cover main body which covers a scroll part was comprised by the 1st site | part and the 2nd site | part, and a thick air layer is formed between these stitching | suture parts and a scroll part. Since this air layer functions as a heat insulation layer, the heat insulation performance of the stitched portion can be improved.

(2) In the heat insulating cover of (1), the stitching portion has a plurality of rows of stitches.

  According to said structure, since a stitch | suture can be strengthened, the leak of the heat | fever from a stitching | suture part can be reduced and the heat insulation performance can be improved further.

(3) Moreover, in the heat insulation cover of said (1) or (2), the inner side auxiliary heat insulating material extended in the circumferential direction is arrange | positioned at the said scroll part side of the said stitching | suture part.

  According to said structure, since the heat leak from a stitching | suture part can be reduced with an inner side auxiliary heat insulating material, heat insulation performance can be improved further.

(4) Moreover, in the heat insulating cover of the above (1) or (2), the first part and the second part are such that the outer peripheral edge portions of the first part and the second part protrude inside the cover body. An inner auxiliary heat insulating material that is sewn and extends in the circumferential direction so as to cover the protruding portion is provided inside the cover main body.

  According to said structure, since the heat leak from a stitching | suture part can be reduced with an inner side auxiliary heat insulating material, heat insulation performance can be improved further.

(5) Moreover, in the heat insulation cover in any one of said (1) thru | or (4), it has the outer side auxiliary heat insulating material extended in the circumferential direction so that the outer side of the said stitching | suture part may be covered on the outer side of the said cover main body.

  According to said structure, since the heat | fever leakage from a stitching | suture part can be reduced with an outside auxiliary heat insulating material, heat insulation performance can be improved further.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation performance in the stitching | suture part of the site | parts which comprise a heat insulation cover can be improved.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a view showing an embodiment of a heat insulating cover of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG.

  In FIG. 1, a heat insulating cover 10 is mounted on a housing 1 having a scroll portion 1A. The scroll part 1 </ b> A is a part of the housing 1 that forms an annular space inside. The housing 1 to which the heat insulating cover 10 is attached may be a compressor housing in addition to the turbine housing. The housing 1 may be a turbocharger turbine housing or a compressor housing, but may be applied to other housings 1 as long as the scroll portion 1A is provided.

  The heat insulating cover 10 includes a cover body 11 that covers the scroll portion 1 </ b> A of the housing 1. As shown in FIGS. 1 and 2, the cover body 11 has a cross-sectional shape that is closed on the outer peripheral side and opened on the inner peripheral side, extends in the circumferential direction so as to cover the scroll portion 1 </ b> A of the housing 1, and has a snail shape as a whole. There is no.

  The heat insulating cover 10 is fixed to the housing 1 by fastening both ends in the circumferential direction of the cover main body 11 with fastening means 24. As the fastening means 24, as shown in FIG. 1, for example, one constituted by a belt 25 and a buckle 26 can be applied.

  As shown in FIG. 2, the cover body 11 includes a first portion 12 that covers a range extending from the outer peripheral surface of the scroll portion 1 </ b> A to the one side end surface (the left side surface in FIG. 2), and the outer peripheral surface of the scroll portion 1 </ b> A It consists of the 2nd site | part 13 which covers the range over (right side surface in FIG. 2).

  Each of the first part 12 and the second part 13 includes a heat insulating material (for example, glass wool) and a bag 15 for storing the heat insulating material 14. The bag 15 is formed by stitching a front surface material 15a and a back surface material 15b made of a heat-resistant material (for example, glass cloth or the like) into a bag shape.

  The outer peripheral edges of the first part 12 and the second part 13 are stitched together, and an air layer 20 is formed between the stitched part 21 between the first part 12 and the second part 13 and the outer peripheral surface of the scroll part 1A. The cover main body 11 is formed so as to. In the configuration example of FIG. 2, the first part 12 and the second part 13 are sewn so that the outer peripheral edge portions of the first part 12 and the second part 13 protrude inside the cover body 11.

  According to the heat insulating cover 10 configured as described above, the cover body 11 that covers the scroll portion 1A is constituted by the first portion 12 and the second portion 13, and thus the outer periphery of the stitched portion 21 and the scroll portion 1A. A thick air layer 20 is formed between the surfaces. Since the air layer 20 functions as a heat insulating layer, the heat insulating performance of the stitched portion 21 can be improved.

  Thus, the air layer which is a heat insulation layer is formed by arrange | positioning the stitching | suture part 21 in the position away from the outer peripheral surface of 1 A of scroll parts. Therefore, the size of the first portion 12 and the second portion 13 and the position of the stitching portion 21 are set so that the air layer 20 is formed thick enough to obtain a desired heat insulating performance (for example, 15 mm to 50 mm or more). It is good to set.

  As shown in FIG. 2, the stitching portion 21 preferably has a plurality of rows of stitches 22. In the configuration example of FIG. 2, the stitches 22 of the stitching portion 21 are triple. By comprising in this way, since a stitch | suture can be strengthened, the leak of the heat | fever from the stitching | suture part 21 can be reduced, and heat insulation performance can be improved further.

  In addition, as in the configuration example of FIG. 2, an inner auxiliary heat insulating material 23 extending in the circumferential direction is preferably disposed on the scroll portion 1 </ b> A side of the stitching portion 21 inside the cover body 11. The inner auxiliary heat insulating material 23 can be fixed to the cover main body 11 by adhesion using sewing or an adhesive. According to this configuration, since the heat leakage from the stitching portion 21 can be reduced by the inner auxiliary heat insulating material 23, the heat insulating performance can be further improved.

  Further, as in the configuration example of FIG. 2, an outer auxiliary heat insulating material 25 that extends in the circumferential direction so as to cover the outer side of the stitching portion 21 may be disposed outside the cover main body 11. The outer auxiliary heat insulating material 25 can be fixed to the cover main body 11 by bonding with sewing or an adhesive. According to this configuration, heat leakage from the stitched portion 21 can be reduced by the outer auxiliary heat insulating material 25, so that the heat insulating performance can be further improved.

  FIG. 3 is a cross-sectional view illustrating another configuration example of the heat insulating cover 10. 3 is the same as FIG. 2 in that the outer peripheral edges of the first portion 12 and the second portion 13 are projected so as to protrude to the inside of the cover body 11, but the inner auxiliary heat insulating material 23 in FIG. Instead, in the configuration example of FIG. 3, the inner auxiliary heat insulating material 24 extending in the circumferential direction is disposed inside the cover main body 11 so as to cover the protruding portion. In the configuration example of FIG. 3, the inner auxiliary heat insulating material 24 has a cross-sectional shape that is curved so as to cover the portion protruding inwardly.

  The configuration other than the above in the configuration example of FIG. 3 is the same as the configuration example of FIG. Also in the configuration example of FIG. 3, heat leakage from the stitched portion 21 can be reduced by the inner auxiliary heat insulating material 24, so that the heat insulating performance can be further improved.

  FIG. 4 is a cross-sectional view showing still another configuration example of the heat insulating cover 10. Unlike the configuration example of FIGS. 2 and 3, in the configuration example of FIG. 4, the outer peripheral edge portions of the first portion 12 and the second portion 13 are sewn so as to protrude to the outside of the cover body 11, and the protrusion An outer auxiliary heat insulating material 26 extending in the circumferential direction is disposed so as to cover the part. In the configuration example of FIG. 4, the outer auxiliary heat insulating material 26 has a cross-sectional shape that is curved so as to cover the portion protruding outward.

  The configuration other than the above in the configuration example of FIG. 4 is the same as the configuration example of FIG. Also in the configuration example of FIG. 4, heat leakage from the stitched portion 21 can be reduced by the outer auxiliary heat insulating material, so that the heat insulating performance can be further improved.

  Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is not limited to these embodiments. . The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

It is a figure which shows embodiment of the heat insulation cover of this invention. It is the II-II sectional view taken on the line of FIG. It is a figure which shows another structural example of a heat insulation cover. It is a figure which shows another structural example of a heat insulation cover. It is a figure which shows the structure of the conventional heat insulation cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 1A Scroll part 10 Heat insulation cover 11 Cover main body 12 1st site | part 13 2nd site | part 14 Heat insulation material 15 Bag 15a Surface material 15b Back surface material 20 Air layer 21 Sewing part 22 Seam 23, 24 Inner auxiliary heat insulation material 25, 26 Outside Auxiliary insulation

Claims (5)

A heat insulating cover attached to a housing having a scroll part,
It has a cover body that covers the scroll part of the housing,
The cover body includes a first part that covers a range extending from the outer peripheral surface of the scroll part to one end face, and a second part that covers a range extending from the outer peripheral face of the scroll part to the other end face. The first part and the second part The outer peripheral edge portions of the cover body are stitched together, and the cover body is formed so as to form an air layer between the stitched portion of the first portion and the second portion and the outer peripheral surface of the scroll portion,
The outer peripheral surface of the scroll part and the stitching part between the outer peripheral edges are opposed to a direction orthogonal to the axial direction of the scroll part, and the outer peripheral edge parts of the first part and the second part are the The outer peripheral edges of the first part and the second part are stitched together so as to protrude inside the cover body ,
The heat insulation cover characterized by having the inner side auxiliary heat insulating material extended in the circumferential direction so that the said protrusion part may be covered inside the said cover main body . A heat insulating cover attached to a housing having a scroll part,
It has a cover body that covers the scroll part of the housing,
The cover body includes a first part that covers a range extending from the outer peripheral surface of the scroll part to one end face, and a second part that covers a range extending from the outer peripheral face of the scroll part to the other end face. The first part and the second part The outer peripheral edge portions of the cover body are stitched together, and the cover body is formed so as to form an air layer between the stitched portion of the first portion and the second portion and the outer peripheral surface of the scroll portion,
The heat insulation cover characterized by the inner side auxiliary heat insulating material extended in the circumferential direction being arrange | positioned at the said scroll part side of the said stitching | suture part. A heat insulating cover attached to a housing having a scroll part,
It has a cover body that covers the scroll part of the housing,
The cover body includes a first part that covers a range extending from the outer peripheral surface of the scroll part to one end face, and a second part that covers a range extending from the outer peripheral face of the scroll part to the other end face. The first part and the second part The outer peripheral edge portions of the cover body are stitched together, and the cover body is formed so as to form an air layer between the stitched portion of the first portion and the second portion and the outer peripheral surface of the scroll portion,
The heat insulation cover characterized by having the outer side auxiliary heat insulating material extended in the circumferential direction so that the outer side of the said stitching | suture part may be covered in the outer side of the said cover main body. A heat insulating cover attached to a housing having a scroll part,
It has a cover body that covers the scroll part of the housing,
The cover body includes a first part that covers a range extending from the outer peripheral surface of the scroll part to one end face, and a second part that covers a range extending from the outer peripheral face of the scroll part to the other end face. The first part and the second part The outer peripheral edge portions of the cover body are stitched together, and the cover body is formed so as to form an air layer between the stitched portion of the first portion and the second portion and the outer peripheral surface of the scroll portion,
The outer peripheral surface of the scroll part and the stitching part between the outer peripheral edges are opposed to a direction orthogonal to the axial direction of the scroll part, and the outer peripheral edge parts of the first part and the second part are the The outer peripheral edges of the first part and the second part are stitched together so as to protrude inside the cover body ,
The heat insulation cover characterized by having the outer side auxiliary heat insulating material extended in the circumferential direction so that the outer side of the said stitching | suture part may be covered in the outer side of the said cover main body . The heat insulation cover of Claim 1 or 2 which has the outer side auxiliary heat insulating material extended in the circumferential direction so that the outer side of the said stitching | suture part may be covered in the outer side of the said cover main body.

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