RU2238421C2 - High-pressure housing made of composite materials (versions) - Google Patents

Abstract

FIELD: mechanical engineering; engine plants.

SUBSTANCE: according to first design version, ring belt fastening zones in high-pressure housing are provided with ring belts made of elastic capron knitted fabric and installed, respectively, with overlapping of edges of single antiadhesive film over inner and outer contours, being connected to film by stitch threads, and connected with coating around outer edge of antiadhesive film and with outer surface of flanges form side of load bearing envelope, by glue compound and elastic ring rubber gaskets. Coating in ring belt fastening zones is reinforced by at least one single layer of capron knitted fabric. According to second design version, ring belt fastening zones in high-pressure housing are provided with double narrow ring belts made of elastic capron knitted fabric with antiadhesive films placed in between, installed, respectively, with overlapping of edges between two wide antiadhesive films over inner and outer contours, being connected to films by stitch threads, and connected with coating around outer edges of wide antiadhesive films, by elastic ring rubber gaskets, and with outer surface of flanges from side of load-bearing envelope, by glue compound and ring elastic rubber gaskets. Coating in ring belt fastening zone reinforced by at least one single of capron knitted fabric.

EFFECT: improved reliability in operation.

3 cl, 3 dwg

Description

The invention relates to cases for high pressure from composite materials used, in particular, in propulsion systems.

Increased demands are placed on pressure hulls made of composite materials to ensure high reliability under conditions of long-term operation, and to eliminate sealing failures and damage during the main operation.

A well-known housing for high pressure made of composite materials containing a power shell with flanges and resilient spacers installed on the pole holes of the bottoms, lined with a coating of rubber-like material with ring girdle zones of release from the release film between the coating and the shell with flanges overlapping the edges of the flanges (patent RU No. 2108476, IPC ⁶ F 02 K 9/34, 1998).

Similar cases are known in which, to compensate for the stresses between the flanges and the shell, elastic-elastic gaskets are placed (US patent No. 3843010, NKI 220-3.1974, application GB No. 2076061, F 02 K 1/80, 1981).

The disadvantages of the known cases include the unreliability of the annular girdle zones of the breakaway due to their failure to provide adequate compliance in conditions of large deformation movements of the flanges under high pressure in the bodies, structural failure, failure to ensure functioning of the product.

As the closest analogue adopted for the prototype, is a housing for high pressure from composite materials according to patent RU No. 2108476.

The main task is to create a new design of cases with increased adaptation to uneven loads arising due to the polarity of power shells.

The technical result from the use of the invention is to increase the strength and reliability, ensuring stable operation in the composition of the product without destroying the structure.

The main problem has been solved and the technical result has been achieved by changing the design in the girdle zones of unfastening, introducing new elements and using the elastic deformability properties of new materials on the basis of a different concept of providing compensation for shear stresses under constrained compression of heterogeneous layers of the casing under excessive pressure of a high-temperature medium.

For this, in a high-pressure housing made of composite materials containing a power shell with flanges and elastic-elastic gaskets installed along the pole holes of the bottoms, internally lined with a coating of rubber-like material with annular girdle zones of release from the adhesive film between the coating and the shell with flanges overlapping the edges of the flanges .

According to the first option

The annular belt zones of release are equipped with ring belts of an elastic elastic knitted nylon fabric, respectively installed with overlapping edges of a single release film along the inner and outer contours fastened with piercing threads, and coated around the outer edge of the release film and with the outer surface of the flanges on the side of the power shell - adhesive composition and elastic rubber gaskets, and the coating in the annular girdle zones of release is reinforced by necks least a single layer of knitted nylon fabric.

According to the second option

The annular girdle release zones are provided with double narrow annular girdles of elastomeric knitted nylon fabric with release films between them, respectively installed with overlapping edges between two wide release films along their inner and outer contours, bonded with them with piercing threads, and with a coating around the outer edges of wide release films - with elastic ring gaskets made of rubber and with the outer surface of the flanges on the side of the power sheath vym composition and ring elastic rubber ring gaskets. The coating in the annular girdle zones of reinforcement is reinforced with at least a single layer of knitted nylon fabric.

Distinctive features of the housing for high pressure composite materials are the signs.

First option

- annular belt zones of release are provided with ring belts of elastically elastic nylon fabric;

- ring belts of elastically knitted nylon fabric respectively installed with overlapping edges of a single release film on the inner and outer contours;

- their fastening with her piercing threads;

- their bonding with a coating around the outer edge of the release film and with the outer surface of the flanges on the side of the power sheath with an adhesive composition and elastic ring gaskets made of rubber;

- reinforcing the coating in the annular girdle zones of unfastening with at least a single layer of knitted nylon fabric.

Second option

- annular belt zones of release are provided with double narrow ring belts of elastically knitted nylon fabric with release films between them;

- the installation of these annular belts with release films between them with overlapping edges between two wide release films on their inner and outer contours;

- fastening of annular belts with the indicated differences with wide release films;

- fastening of annular belts with the indicated differences around the outer edges of wide release films coated with elastic ring rubber gaskets, and with the outer surface of the flanges on the side of the power shell with adhesive and ring elastic rubber ring gaskets;

- reinforcing the cover with a knitted nylon fabric in the annular zones of release.

These distinctive features of the housing for high pressure made of composite materials are significant, since each of them individually and jointly aims to solve the problem and achieve a new technical result. In the first and second versions of the housing, the release film in the girdle of the coating break-away zone with the power shell is provided with elastic elastic ring belts made of knitted nylon fabric fastened with it and the coating in the fastening zone with knitted nylon fabric, which allows providing relative elastic deformation of the coating of the power shell and flanges during curing of the housing blank in a thermal furnace and during the main operation of the housing under high pressure without disturbances in the material coating and destruction of the power shell.

These distinctive essential features are new, since their use in the prior art, analogues and prototype was not found, which allows us to characterize the proposed technical solution in accordance with the criterion of “novelty”.

A single set of new essential features with common known essential features allows us to solve the problem of creating a housing for high pressure from composite materials and achieve new technical results, which characterizes the new technical solution by significant differences from the prior art, analogues and prototype. The new technical solution is the result of development and creative contribution without the use of any standards or recommendations in this technical field is original, non-obvious for specialists, made on the basis of a new concept of providing compensation for shear stresses without changing the position of the release film in the girdle zones of release relative to the coating of the power shell and flanges by fixing and fixing it along the inner and outer edges by elastic elastic ring belts t knitted nylon fabric, and coatings in the girdle of the unfastening zone with at least a layer of similar fabric are characterized according to the criterion of “inventive step”.

The invention is illustrated by drawings with a brief description of them:

Figure 1 presents a General view of the housing for high pressure from composite materials; figure 2 is a cross-section of the housing in the area of the flange in the axial direction with the showing of the annular zone of the zone of release (on an enlarged scale) - the first option; figure 3 is a cross-section of the housing in the area of the flange in the axial direction with the showing of the annular zone of the zone of release (on an enlarged scale) - the second option.

A more detailed description of the invention with the position shown in the drawings is as follows.

The case for high pressure made of composite materials (Fig. 1) contains a power shell 1 with flanges 2, 3 and elastic-elastic gaskets 4, 5 installed along the pole holes of the bottoms 6, 7, internally lined with a coating 8 made of rubber-like material with annular search zones of release 9 , 10 of a release film between the coating 8 and the shell 1 with flanges 2, 3, overlapping the edges of the flanges 2, 3. In the first embodiment, the girdle release zones 9, 10 of the housing (figure 2) are equipped with annular belts 11, 12 of an elastic knitted capron new fabric, respectively installed with overlapping edges 13, 14 of a single release film 15 along the inner and outer contours, fastened with it with stitching threads 16 and with the outer surface 17 of the flanges 2, 3 from the side of the power sheath 1 with adhesive composition 18 and the elastic ring gaskets 19, 20 made of rubber. Coating 8 in the annular search zones of the release 9, 10 (figure 2) is reinforced with at least a single layer 21 of knitted nylon fabric. In the second embodiment, the annular girdle release zones 9, 10 of the body (Fig. 3) are provided with double narrow annular girdles 22, 23 and 24, 25 of elastically knitted nylon fabric with release films 26, 27 between them, respectively installed with overlapping edges 28, 29 between two wide release films 30, 31 along their inner and outer contours, fastened with piercing threads 32, and with a coating 8 around the outer edges 29 of wide release films 30, 31 with elastic pads 33 made of rubber and with an outer surface 34 of the flanges 2, 3 from the side of the power sheath 1 with an adhesive composition 35 and ring elastic rubber gaskets 36 of rubber. The coating 8 in the annular girdle zones of release 9, 10 (FIG. 3) is reinforced with at least a single layer 37 of knitted nylon fabric.

The functioning of the housing, made according to the proposed technical solutions (Figs. 1-3), consists in the perception by the force shell 1 of the forces exerted by excessive internal pressure through the coating 8 and flanges 2, 3 within elastic deformations without disturbing the coating material 8 and breaking the force shell 1 with a high degree of reliability.

Cases for high pressure, made of aramid tows (threads) (Armos) and a polymer binder based on epoxy resin using the proposed technical solutions, showed positive results during testing.

Thus, new technical solutions when implemented in high pressure housings made of composite materials can achieve a new technical result, they also meet the criterion of “industrial applicability”, i.e. level of inventions.

There may be various housing options with different shapes, sizes and arrangement of individual elements, their various combinations. The presented options are preferred for implementation, if all this does not go beyond the scope of the technical solutions set forth in the claims, using the discovered and other properties described in this description.

Claims (2)

1. Housing for high pressure made of composite materials, containing a power shell with flanges and elastic-elastic gaskets mounted on the pole holes of the bottoms, lined with a coating of rubber-like material with ring girdle zones of release from the adhesive film between the coating and the shell with flanges that overlap the edges flanges, characterized in that the annular belt zones of release are provided with ring belts of elastic-elastic knitted nylon fabric, respectively tanned with overlapping edges of a single release film along the inner and outer contours, fastened with piercing threads, and coated around the outer edge of the release film and with the outer surface of the flanges on the side of the power sheath — with adhesive and elastic rubber ring gaskets, the coating in annular girdle zones of release, reinforced with at least a single layer of knitted nylon fabric. 2. Housing for high pressure made of composite materials, containing a power shell with flanges and elastic-elastic gaskets mounted on the pole holes of the bottoms, lined with a coating of rubber-like material with ring girdle zones of release from the adhesive film between the coating and the shell with flanges that overlap the edges flanges, characterized in that the annular belt zones of the release are provided with double narrow ring belts of elastic-elastic knitted nylon fabric with anti-adhesive films between them, respectively installed with overlapping edges between two wide anti-adhesive films along their inner and outer contours, fastened with piercing threads, and coated around the outer edges of wide anti-adhesive films with elastic-elastic ring gaskets made of rubber and with the outer surface of the flanges from the side of the power sheath - with adhesive composition and ring elastic-elastic gaskets made of rubber, and the coating in the annular girdle zones of reinforcement of at least a single layer of knitted nylon fabric.

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