Pressure vessel

FIELD: storing or distributing gases or liquids.

SUBSTANCE: pressure vessel has cylindrical shell made of spiral and ring layers which are made of a fiber composite material and bottoms with flanges made of spiral layers and set in openings. The thickness of the cylindrical shell uniformly decreases along the length in the direction to the bottom with greater opening due to the decrease of the thickness of the ring layers.

EFFECT: reduced weight and cost of vessels.

3 dwg

 

The invention relates to the field of gas storage and can be used in the pressure cylinders made of composite materials by the winding method.

Known cylinder pressure (patent RF №1744358, MKI F 17 C 1/06, 1992), containing the cylindrical shell and the bottom, are made as one whole method spiral winding. The thickness of the cylindrical shell of the tank is made variable in accordance with the stated formula, with the laying on winding in certain places napkins made of composite material.

The disadvantage of this design is the use in its manufacture of hand-laying napkins.

A known design of composite cylinder for storing compressed gas (patent RF №2061927, MKI F 17 1/16, 1996 - the closest equivalent), containing a cylindrical power shell, made of spiral and circular layers of fibrous composite material, and adjacent to the bottoms of the spaces between the spiral layers of the power shell placed additional annular layers.

This increases the reliability of fastening elements of the mortgage in the pin holes of the bottoms, however, the comparative plots show a slight increase in the stresses in the cylindrical part of the power of the shell. In addition, significantly increases the mass of the structure.

In the case of a cylinder pressure of the pin holes of different diameters angles winding reinforcing fibers spiral layers in areas adjacent to the bottoms, perform various reasons, the technology of forming the bottoms. When calculating the thickness of the cylindrical shell is not taken into account the different load ring and spiral layers in the areas adjacent to the bottoms. This leads to the weighting of the structure.

The objective of the proposed technical solution is to reduce the weight and cost of the material of cylinder pressure with the pin holes of different diameters by taking into account the peculiarities of the loading end zones of the cylindrical shell and providing ravnopravnosti design.

This problem is solved due to the fact that the cylinder pressure containing cylindrical shell, made of spiral and circular layers of fibrous composite material, and formed the spiral layers of the bottom with flanges mounted in the pin holes, and the thickness of the cylindrical shell along its length variable, the thickness of the cylindrical shell decreases along its length in the direction of the bottom with a large pin hole by reducing the thickness of the annular layer.

The thickness of the annular layer from the side of smaller and larger pin holes made in accordance with the equation:

where h1the thickness of the annular layer from the side of the smaller pin holes;

h the thickness of the annular layer of the larger pin holes;

where α1the angle of winding of the spiral layers from the side of the smaller pin holes;

R1is the radius of the smaller pin holes;

RCis the radius of the cylindrical shell;

where α2the angle of winding of the spiral layers of the larger pin holes;

R2is the radius of the larger pin holes.

Under the circular and spiral layers should understand the layers with the corresponding arrangement of the reinforcing fibers of the composite material during winding. Under the thickness of the annular or spiral layers should understand the total thickness of the layers with the corresponding arrangement of the fibers in the thickness of the shell. Thus the sequence of layers of circular and spiral arrangement of the reinforcing fibers may be different. The thickness of the spiral layers does not change along the length of the cylindrical shell. The angle of winding of the spiral layers along the length of the shell and change the thickness of the annular layer along the length of the shell is made uniform.

The presence of one of the pin holes bigger and execution of the spiral winding angle along the length of the cylindrical shell increasing in the direction of this hole leads to that is, these spiral layers partially perceive and radial load. In this regard, to ensure alignment of the load of the cylindrical shell along its length thick annular layer is made decreases in the direction of the bottom with a large flange in comparison with the estimated thickness is obtained without taking into account the different radius of the pin holes. This is achieved by reducing the weight of the cylinder pressure while ensuring ravnopravnosti design.

The above ratio of the thickness of annular layers from the side of the smaller and larger holes in the bottoms of the flanges of the cylinder pressure is calculated based on ravnopravnosti design with appropriate thickness ratio ring and spiral layers forming the wall of the cylindrical shell.

The cylinder pressure shown on the drawings:

figure 1 - General view of the cylinder pressure;

figure 2 - the scheme of the thickness of the spiral and annular layers along the length of the cylindrical shell;

figure 3 - place a figure 1.

The cylinder pressure with the pin holes of different sizes includes a cylindrical power shell 1 with radius RCthe bottom 2 with pin hole with radius R1and the bottom 3 with a vent R2have flanges 4 and 5. The shell 1 and the bottom 2, 3 are made as one unit by winding the shell 1 in the designs of spiral and circular layers of fibrous composite material, and the bottom 2, 3 formed spiral layers of composite material. The angle of winding of the spiral layers (figure 1) increases from α1from the bottom 2 with a smaller pin hole to α2from the bottom with a large pin hole. The thickness H of the cylindrical shell 1 (2) sum of thickness hwithspiral layers and the total thickness of annular layers, decreasing the length of the cylindrical shell 1 in the direction of the bottom 3 with a large pin hole from h1to h2.

As a composite material for cylinder pressure may be used any one of the known reinforcing materials: glass, basalt, carbon, and other organic fibers.

Example.

The cylinder pressure fiberglass.

The length of the container: 3500 mm

The radius of the cylinder: RC=450 mm

The pole radius of the holes R1=175 mm

The pole radius of the holes R2=275 mm

Because the container is designed for possible use on the helicopter with gas fuel system, the weight savings is significant.

The cylinder pressure containing cylindrical shell, made of spiral and circular layers of fibrous composite material, and formed the spiral layers of the floor f is anzame, mounted in the pin holes, and the thickness of the cylindrical shell along its length AC, characterized in that the thickness of the cylindrical shell decreases uniformly along its length in the direction of the bottom with a large pin hole by reducing the thickness of the annular layer.



 

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Pressure vessel // 2244868

FIELD: storing or distributing gases or liquids.

SUBSTANCE: pressure vessel has cylindrical shell made of spiral and ring layers which are made of a fiber composite material and bottoms with flanges made of spiral layers and set in openings. The thickness of the cylindrical shell uniformly decreases along the length in the direction to the bottom with greater opening due to the decrease of the thickness of the ring layers.

EFFECT: reduced weight and cost of vessels.

3 dwg

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