Shear-resistant ledge of high-pressure vessel and shell interface element

FIELD: machine building.

SUBSTANCE: high-pressure vessel comprises composite shell, metallic ledge making the channel in said shell and including the neck and interface element. Said interface element is arranged between composite shell and said ledge. Note here that said interface element is not connected with said composite shell nor with said ledge. This allows displacement between interface element and composite shell and between interface element and ledge. Note also that interface element comprises neck abutting on ledge neck. Note that interface element comprises material selected from the group consisting of polymer, elastomer and thermoplast with Young's modulus larger than 250 psi and smaller than 10 millions of psi.

EFFECT: protection against damages caused by peeling.

11 cl, 8 dwg

The level of technology

The pressure vessels are typically used for storage of various fluid under pressure, for example, when storing hydrogen, oxygen, natural gas, nitrogen, propane and other fuels. Suitable materials for the container include laminated layers of winding optical fiber or other synthetic fibres, bonded together by heat shrinkage or thermoplastic resins. Within the composite shell is often placed polymeric or other non-metallic elastic inner lining or chamber for sealing the vessel and prevent contact of the inner fluid composite material. The composite design of the vessels provides numerous advantages, for example, light weight and resistance to corrosion, fatigue and sudden failures. These properties due to the high specific strength of reinforcing fibers or filaments, which are usually oriented in the direction of the main force design of pressure vessels.

Figure 1 and 2 shows an elongated vessel 10 of a high pressure, such as a vessel, disclosed in U.S. patent No. 5476189, which is included here by reference. The vessel 10 has a main section 12 of the housing end sections 14. Metal ledge 16 (e.g., aluminum) is provided on one or both ends of the vessel 10 to about the level of the channel, connected with the interior of vessel 10. The vessel 10 is formed from the inner polymeric inner lining 20 is covered with the outer composite shell 18. In this case, the "composite" means a fibre-reinforced material with a resin matrix, for example, winding or layered structure. Composite shell 18 perceives all structural loads, and plastic cladding 20 provides a gas barrier.

Cladding 20 has an essentially hemispherical end section 22 with an opening 24 aligned in the hole 26 in the outer composite shell 18. The projection 16 is located in these aligned holes and includes a section 28 of the neck and protruding radially outward section 30 of the flange. The projection 16 forms a channel 32 through which fluid under high pressure may be communicated with the interior of vessel 10 high pressure.

In some applications, the vessel 10 is used as a battery. This application involves high-cycle modes (sealing/depressurization) of the vessel 10. The neck 28 and the flange 30 aluminum projection 16 are rigid. However, under the pressure of the composite shell 18 is experiencing stress. If the composite shell 18 is in direct contact with the metal material of the projection 16, this tension can lead to the delamination of the composite shell 18 at the time of the cycle of accumulation due to the wear of the composite shell 18 of the projection 16.

Disclosure of inventions

In one facility, we offer a pressure vessel containing composite shell; a protrusion, forming a channel in a composite shell and containing a mouth; and a user interface element located between the composite shell and the tab, and the interface element is not connected neither with composite shell, or protrusion, thereby providing movement between the interface element and the composite shell and providing movement between the interface element and the protrusion, and the interface element contains a mouth located adjacent to the mouth of the ledge.

In this disclosure of the invention in a simplified form concepts, which further described below in the detailed description. This disclosure of the invention is not intended to identify key features or essential features of the disclosed or claimed subject matter of the invention and is not intended to describe each disclosed option exercise or every implementation of the disclosed or claimed subject matter of the invention. In particular, the features described herein in relation to one variant of implementation, can be equally applicable to other. In addition, this disclosure of the invention is not intended for use in determining the scope of the claimed invention. Many other the e innovative advantages, the signs and the relationship will become clear as you read this description. The following drawings and description are examples, in particular, the illustrative embodiments.

Brief description of drawings

Opened object of the invention will be further explained with reference to the accompanying drawings, in which identical design or system elements are denoted by identical reference positions in several types.

Figure 1 is a side view of a conventional elongated pressure vessel.

Figure 2 is a view in partial section of one end of the pressure vessel along the line 2-2 in figure 1.

Figure 3 is a perspective view of the first variant implementation sdvigoustojchivosti ledge and element wrapper interface of the present description.

Figure 4 is a view in partial section similar to the view of figure 2, the pressure vessel containing sdvigologiya ledge and the interface element shell 3.

Figa is an enlarged view in partial section of the marked circle (reference position 5) the area of figure 4, showing the second embodiment of sdvigoustojchivosti ledge and element wrapper interface according to the present invention.

Figv is an enlarged view in partial section marked the circle (reference position 5) region in figure 4, showing the third embodiment of sdvigoustojchivosti ledge and element wrapper interface according to the present invention.

Figs is an enlarged view in partial section of the marked circle (reference position 5) the area of figure 4, showing a fourth embodiment of sdvigoustojchivosti ledge and element wrapper interface according to the present invention.

.5D is an enlarged view in partial section of the marked circle (reference position 5) the area of figure 4, showing the fifth embodiment of sdvigoustojchivosti ledge and element wrapper interface according to the present invention.

Although the above drawings show one or more embodiments of the disclosed object of the invention is also considering other options for implementation, as noted in the description. In any case, this description is disclosed an object of the invention by way of representation and not limitation. It should be understood that specialists in this field of technology can be developed, many other modifications and embodiments of within the scope and essence of the present invention.

Drawings can be made not to scale. In addition, where there are terms such as "above", "below", "above", "below", "upper", "lower", "side", "PR is the first", "left", etc. should be understood that they are used only to facilitate understanding of the description. It is assumed that the design can be oriented differently.

Detailed description of the invention

After many cycles of pressurization and depressurization, often peeling of the composite shell 18, especially at the point 33 (2), where the top metal projection 16 is in contact with the composite shell 18. A known solution to this problem is described in U.S. patent No. 5,429,845, which is included here by reference. In the present description a sample implementation of a vessel includes sdvigologiya element 34-34D interface provided between the lip 16 and the composite shell 18, as shown in figure 4-5D. Although figa-5D shows only half of the section of the pressure vessel, the other half is a mirror image (about the axis 35 figure 4). The element 34-34D interface may also continue until the interface between the composite shell 18 and liner 20 is near the ledge 16. The element 34-34D interface is made with the ability to create flexible, high-wear surface between the lip 16 and the composite shell 18. An exemplary configuration of the element 34-34D interface is illustrated in figure 3-5D. The element 34-34D interface facilitates the sliding of the composite shell 18 of the projection 16 at the time GE the cross and depressurization.

In an exemplary embodiment, the element 34-34D interface does not connect with the composite shell 18 or projection 16, thereby providing movement between the element 34-34D interface and the composite shell 18 and providing movement between the element 34-34D interface and the projection 16. Providing the appearance of such slip is necessary to prevent internal shear deformation of the material used for the element 34-34D interface, or rupture element 34-34D interface.

If the element 34-34D interface is made from a material, such as rubber, which does not resist shear effort, it can be worn (for example, if it is lean) movement of the composite shell 18 relative to the projection 16. Accordingly, in an exemplary embodiment, the element 34-34D interface is made from a material that is highly resistant to shear effort, for example, Polyoxymethylene (mainly related to RUM and also known as Polyacetal or polyformaldehyde), engineering thermoplastic having a high stiffness, low friction and excellent dimensional stability. He was mostly known under the trade name DERLINTM DuPont. Such material element interface provides high wear and low friction between the element 34-34D interface and the composite shell 18, and between the element 34-34D online is RFAS and ledge 16.

Other suitable materials include, for example, a polymer or elastomer, reinforced with a woven or chopped fibers. These materials can provide additional wear resistance element 34-34D interface. The most suitable materials for the element 34-34D interface have a modulus of elasticity greater than the modulus of elasticity of rubber (about 250 pounds per square inch (psi)) to avoid destruction of the element 34-34D interface. Moreover, the most suitable materials for the element 34-34D interface have a modulus of elasticity that is less than the elastic modulus of the metallic material of the ledge (the modulus of elasticity of aluminum is about 10 million pounds per square inch (million pounds per square inch); is the modulus of elasticity of steel is approximately 29 million pounds per square inch, to reduce the concentration of load on the top 33 of the projection 16, which can destroy the composite shell 18. Because of the higher loads or long cycles, which can be exposed to the vessel, the material for the element 34-34D interface should be more durable than usually used rubber to avoid grinding element 34-34D interface. For example, DELRINTM has a modulus of elasticity of about 350 thousand pounds per square inch (thousands of pounds per square inch).

In exemplary embodiments, the implementation element 34-34D interface includes Gorlov the well 38, which contributes to the flexibility of the design, which will not be prone to damage due to contact with the projection 16 and the composite shell 18, and therefore protects the composite shell 18 from damage. In some embodiments, implement, for example, shown in figure 4, 5B, 5C and 5D, the end 39 of the cap 38, 38B, 38C, 38D continues throughout the thickness of the composite shell 18 is near the projection 16 so that the composite shell 18 does not come into direct contact with the projection 16. In other embodiments, implementation of, for example, shown in figa, neck 38A does not continue through the entire thickness of the composite shell 18 is near the projection 16, so that the composite shell 18 is in direct contact with the projection 16. In other embodiments, implementation of, for example, shown in figs, neck 38C is direct (i.e., having the same thickness and continuing parallel to the neck 28 of the ledge 16). In other embodiments, implementation of, for example, shown in fig.5D, neck 38D tapers to a lesser thickness as it approaches the end 39. In other embodiments, implementation of, for example, shown in figure 4, 5A and 5B, the neck 38, 38A, 38B has a shoulder 40, 40A, 40B adjacent the end 39 and continuing radially outward. The flange 40, 40A, 40B provides a mechanical lock, which prevents the axial movement of the composite shell 18 from the skirt 36, the sama is maintaining a reliable engagement of the element 34 of the interface and the composite shell 18 axially, despite the unfavorable conditions of loading, which is exposed to the vessel 10. In some embodiments, implement, for example, shown in figv, the lower portion or skirt 36V element 34B interface has essentially the same thickness and tapers only at the edge 42 to reduce the gap voltage. In other embodiments, implementation, such as shown in figure 4, 5A, 5C and 5D, the skirt 36, 36A, 36C and 36D tapers to a lesser thickness as its continuation radially outward from the neck 38, 38A, 38C, 38D. This narrowing can lead to better management of boundary pressures and control distributions of the loads.

Although the present invention has been described with reference to several embodiments, specialists in the art should understand that can be made various changes in form and content within the essence and scope of the invention. In addition, any sign, unveiled in relation to one variant of implementation, may be included in another variant implementation, and Vice versa.

1. The pressure vessel, comprising: a composite membrane;
metal ledge forming a channel in a composite shell and contains the mouth; and
the interface element located between the composite shell and the tab, the element interface does not connect with the composite membrane or higher is upon, thereby providing movement between the interface element and the composite shell and providing movement between the interface element and the protrusion, and the interface element contains a mouth located adjacent the neck of the ledge, and the interface element contains a material selected from the group consisting of a polymer, elastomer, thermoplastic and has a modulus of elasticity greater 250 psig and less than 10 million pounds per square inch.

2. The vessel of claim 1, wherein the interface element includes Polyoxymethylene.

3. The vessel according to claim 1, in which the interface element contains a lot of fibers.

4. The vessel according to claim 3, in which fibers are woven.

5. The vessel according to claim 3, in which the fibers are chopped.

6. The vessel according to claim 1, in which the neck of the user interface element includes a collar that continues radially outward from the end cap of the element interface.

7. The vessel according to claim 1, in which the neck of the user interface element continues throughout the thickness of the composite shell so that the composite membrane is not in contact with the tab.

8. The vessel according to claim 1, in which the neck of the user interface element tapers to its end.

9. The vessel according to claim 1, in which the interface element further comprises a skirt that continues radially outward from the mouth of the UI element.

10. The vessel according to claim 9, in which the skirt is essentially about the be otherness thickness.

11. The vessel according to claim 9, in which the skirt tapers from the mouth of the interface element to the edge of the skirt.