ТЕХНОЛОГІЧНЕ ОБЛАДНАННЯ НА ПОВІТРЯНИХ ПОДУШКАХ КОВЗАННЯ - ЗАСТОСУВАННЯ В ЛІТАКОБУДУВАННІ. РОЗРАХУНОК ПАРАМЕТРІВ

Abstract

The technological equipment under consideration relates to air-cushioned out-door vehicles operating from the workshop pneumatic network. Their designs are based on the modular principle. A typical design of such equipment equipped with inflatable balloon fences is presented. The effectiveness of their use in aircraft construction is shown. When performing interoperational movements, they provide savings in production space due to the compact placement of aircraft in assembly shops. When performing mounting and docking operations, the proposed equipment does not require accurate combination of mating units and simplifies the process of docking heavy units. The equipment also allows for cyclic ground tests of a rotary wing of an aircraft with loads close to flight. This eliminates possible emergency situations during flight tests and ensures the safety of expensive products. When performing loading and unloading operations, the use of air cushions allows to reduce the weight of loading equipment, as well as reduce the time and cost of these operations. Most researchers consider the flow to be viscous and laminar due to small flow gaps be-tween the balloon guard and the floor supporting surface. A new approach is pro-posed here. It is based on a turbulent regime of outflow from an air cushion. This is confirmed by replacing the real air path with an equivalent circular section. As a result, the configuration of the outlet channel is transformed into a short confuser diffuser nozzle with a small length along the flow. And such resistances are considered turbulent. As the first turbulent throttle acts as an air flow regulator at the en-trance to the support. Proceeding from this, calculation methods are proposed that allow one to determine expendable, energy, and specific indicators of both individual modules on air cushions and systems based on them. The information necessary for the designer is given to solve current problems in aircraft construction and other are-as of technology.