НАЗЕМНО-БОРТОВІ СИСТЕМИ ВИПРОБУВАНЬ ТА ДІАГНОСТИКИ ВЕРТОЛІТНИХ РЕДУКТОРІВ

Abstract

The article is an overview and information. An effective direction of operational diagnostics of the most stressed units - gear drives of GTE gearboxes are methods for analyzing vibration signals of the engine casing.The theoretical and experimental substantiation of vibration diagnostics of GTE gears and helicopter gearboxes in-dicates that the main function that characterizes the energy efficiency of torque transmission and is sensitive to the initiation of defects in gear teeth can be considered the deviation of the parameter of the first derivative of the angular velocity of re-coupling of the teeth.The system for collecting and processing flight information is divided into onboard and ground parts. The onboard sub-system in the form of hardware and software systems provides for the collection and preliminary processing of primary infor-mation - vibration signals, synchronization, temperature, etc. It interacts with the standard equipment of the helicopter to obtain information regarding the modes of operation and flight of the helicopter. The on-board subsystem, as a rule, contains vibration sensors, speed sensors and accumulation and pre-processing blocks.The ground subsystem is a set of hardware and software tools that provide automatic express analysis and extended analysis of information recorded on board. The ground subsystem of the diagnostic system can be divided into local and central (support center). The local part is the software for processing the information accumulated during the flight and the database, which are hosted by the organization operating the helicopters.At present, methods are already being used for servicing machines according to the actual state or identifying parts without disassembling them based on vibration diagnostic tests. Their use allows to simultaneously reduce the cost of adjust-ment work and improve their quality, since not only the condition of the parts of the product is checked, but also how they are assembled, whether there are misalignments of bearings or gears during assembly.After the flight, the accumulated data is transferred to the ground subsystem of the operating organization, where post-flight analysis is carried out, processing results are issued and the results are stored in a local database. Further, the processing results are synchronized with the database of the support center to provide information on the technical condition to the devel-opers of helicopters and their units, as well as to operating organizations