Tkachuk V. Creation of the hybrid tool action for cleaning chamber turbo units

The paper considers the development of a hybrid tool for cleaning operations of the internal cavities of tubing units for various technological purposes. It is shown that the implementation of high-quality cleaning is one of the responsible stages of preventive and restorative work of turbine units. In contrast to the currently used technologies of chemical and technical cleaning, jet methods have a number of undeniable advantages, in particular, high environmental friendliness, productivity, do not lead to changes in the state and microgeometry of the surface from which the contamination is removed. In order to increase the energy efficiency of the process and reduce re-movements of the tool, it is proposed to apply water-ice effect with simultaneous initiation of initial defects of the pollution layer by mechanical action created by concentrated masses on elastic suspensions, which are introduced into the flow The design of the hybrid tool is developed, its research and tests are carried out. The use of the proposed device with connected coaxial conical nozzles showed that there is a functional conditionality of generating acute-angled ice cubes capable of more effective cleaning of the contamination layer, the appropriate ratio of nozzle cross sections and leakage modes of water and cryogenic liquid. The functional conditionality of the cleaning area as a function of time is determined depending on the energy parameters of the jet, the conditions of its movement by the treated surface and the initial damage of the film by mechanical initiators. The mechanism of destruction of viscous and adhesively strong dirt films is specified, the criterion of cleaning efficiency and quality of cleaning of the processed surfaces is offered. Functional dependences for evaluation of cleaning efficiency are obtained. It is concluded that the Synergia of the action of water-cross flow and cyclic shock-dynamic impact allows to increase the cleaning efficiency of the surfaces of turbine units by 40 %, and to bring to 0.0015–0.002 m2/s when using nozzles 0.8 mm and 2.0–2.4 mm. It is established that the proposed tool allows you to clean complex surfaces at angles in the range /3–/6. The maximum fluid pressure does not exceed 90-110 MPa, and the consumption of cryogenic fluid for the formation of the flow of ice cubes 10–15 g/s; it is expedient to carry out processing with a twist of a stream on distance of 50–70 mm, with overlapping of tracks on 20–25%.