Abstract
Rubber seals for closing devices operating in cold climates degrade quickly in aggressive environments at very low temperatures. As a result, leaks and failures occur in the closure devices. Therefore, there is a great need to develop a new model of rubber seals and develop their scientific basis. The article is devoted to increasing the sealing effect of rubber seals of machines and equipment, including closures, by introducing the anisotropy of the rubber matrix into its structure with control of the characteristics of hard closures obtained from rubber. For this purpose, new models of the gate valve design were obtained and new models of two-layer panel seals based on a modified rubber elastomer matrix are applied to these structures. For this, a test program is carried out in the form of an analytical trajectory of large, medium and small constant curves in two closed forms based on characteristic deformations to study the anisotropy of matrix deformations. It is found that the eigenvector of the deformation anisotropy of the matrix is not in the load trajectory before it collapses, it arises with a delay. This delay slows down the rate of destruction. This property of deceleration of the main eigenvector of the deformation anisotropy of the matrix is subjected to a very complex loading of the initial fields, in the latter sections it is also observed in samples No. 2, No. 3, tested along the trajectory of linear loading. This delay slows down the destruction rate. Thus, the direction of the deceleration property of the main eigenvector can be considered quite common. This leads to an increase in its resistance to wear in a highly aggressive environment
Highlights
There is a need to develop new types of sealing elements that can reliably operate on machines and equipment in various weather conditions around the world (–55 °C and +55 °C)
When solving design problems and problems associated with changing the characteristics of the rigidity of rubber seals, rigid closures are often introduced into the rubber seal of the matrix, the deformation of which can be protected in comparison with the deformation of the matrix
Based on a two-layer matrix model, modern composite seals are resistant to freezing, heat, and wear in highly corrosive environments
Summary
There is a need to develop new types of sealing elements that can reliably operate on machines and equipment in various weather conditions around the world (–55 °C and +55 °C). There is a great need for frost-resistant and heat-resistant rubber seals used primarily in equipment This task requires the preparation of modern composite seals that work for mechanical wear (abrasive, water-jet and flammable) in highly corrosive environments. When solving design problems and problems associated with changing the characteristics of the rigidity of rubber seals, rigid closures are often introduced into the rubber seal of the matrix, the deformation of which can be protected in comparison with the deformation of the matrix For this purpose, a new matrix model has been proposed for use in covering structures [1,2,3]. Based on a two-layer matrix model, modern composite seals are resistant to freezing, heat, and wear in highly corrosive environments These seals are adopted by the seals of the newly invented valve and can be applied to various types of closure devices
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