INCREASED DURABILITY OF FRICTION UNITS IN OIL AND GAS INDUSTRY
Keywords:
multipair friction units, drilling hoist, dynamic loading, band-block brake, thermal loading.Abstract
This article is devoted to decrease of durability of dynamic and thermal loading of band-block brakes of drilling hoists of drill units at the expense of usage new type of a band-block brake with multipair friction units.
The mathematic description of dynamic processes at the beginning and second stages of braking of a new type of a brake is made and the analytical
dependences for definition its main operation and design parameters are obtained: friction forces, efforts of pulls filling and unfilling of branches of a
band, brake moments.
As a result of the held experimental researches of a new brake are obtained: legitimacies of change of unit loads, surface temperatures, friction
coefficients, wear of external and internal surfaces of frictional sites of a brake; legitimacies of influencing of static and dynamic coefficients of a
mutual overlap internal and external pairs of abrasion on values of friction forces, friction coefficients, surface temperatures and braking time at
different stages.
References
2. Крагельский И.В. Основы расчета на трение и износ / И.В. Крагельский, М.Н. Добычик, В.С. Камбалов // Машиностроение. − М., 1977. – 530 с.
3. Чичинадзе А.В. Износостойкость фрикционных полимерных материалов / А.В. Чичинадзе, В.Я. Белоусов, И.М. Богатчук // Вища школа. − Львов:, 1989. − 144 с.
4. Чичинадзе А.В. Материалы в триботехнике нестационарных процессов / А.В. Чичинадзе, Р.М. Матвеевский, Э.Д. Браун // Наука. − М., 1986. − 248 с.
