The majority of the failures of trailbuilder hydraulic systems operating in the north are connected with the influence of low negative temperatures. Therefore there is a need to apply a prelaunch thermal preparation by means of the fluid drive.The requirement of power consumption minimization on the thermal preparation of the fluid drive is especially topical during independent operation of machines in conditions of low negative temperatures far from mechanization bases where there are no constant sources of thermal and electric energy, or warm rooms.Nearly all earlier systems of thermal preparation of the fluid drive involve the heating of oil which is in a hydraulic tank and the hydraulic line, moving in a small circle. Thus hydraulic engines do not stay heated-up and the oil, which is inside, is solidified, which considerably complicates the start of motion of the mobile elements in the sealing areas. It is necessary to reduce the degree of loading at the time of the first hydraulic engine start-up so reducing the intensity of wear and prolonging the service life of elements of the fluid drive.In order to study the hydraulic components at low temperatures in the Tyumen State Oil and Gas University in the Department of Transportation and Technological Systems under the leadership of Professor Sh. Merdanov, an experimental installation of the thermal preparation of hydraulic elements was developed. The research facility allows for all planned studies involving measurement of the static and dynamic characteristics of the hydraulic drive.The effect of the implementation of the proposed development is achieved by reducing fuel consumption by heating the hydraulic system, resulting in an increase in productivity, reducing the cost of repair and maintenance of the hydraulic system, and increasing its service life.

No abstract

This paper discusses warm-up processes for the hydraulic system components of road construction machinery using mathematical and physical simulations. The efficiency of these processes is governed by warm-up and cool-down rates of the hydraulic actuator components. It studies how various hydraulic system components interface as they warm up. The general task is to estimate the dynamic behavior of the components and loops comprising such components and the entire warm-upsystem. The models of the transient heat flow process of the warm-up system are based on the heat balance equation of the flowing medium (of the heat transfer fluid – a hydraulic fluid) within the control volume. For experimental verification, the hydraulic actuator components warm-up modes using the warmed-up hydraulic fluid from the hydraulic tank have been tested on the hydraulic test bench that we developed. The example of consecutive warm-up of the hydraulic system components is given. Based on this, after the experimental findings were processed, correlation coefficients for different warm-up modes and types of relationships between the hydraulic actuator component temperatures and their warm-up times were determined.

Журнал зарегистрирован в Управлении Федеральной службы по надзору в сфере связи, информационных технологий и массовых коммуникаций ПИ № ФС77-41672 от 13 августа 2010г. Журнал размещен в открытом бесплатном доступе на сайте www.ntvp.ru, и в Научной электронной библиотеке (участвует в программе по формированию РИНЦ). Журнал включен ВАК РФ в перечень научных журналов, в которых должны быть опубликованы основные научные результаты диссертаций на соискание ученых степеней доктора и кандидата наук. Подписной индекс в объединенном каталоге «Пресса России» № 12025.

Журнал зарегистрирован в Управлении Федеральной службы по надзору в сфере связи, информационных технологий и массовых коммуникаций ПИ № ФС77-41672 от 13 августа 2010г. Журнал размещен в открытом бесплатном доступе на сайте www.ntvp.ru, и в Научной электронной библиотеке (участвует в программе по формированию РИНЦ). Журнал включен ВАК РФ в перечень научных журналов, в которых должны быть опубликованы основные научные результаты диссертаций на соискание ученых степеней доктора и кандидата наук. Подписной индекс в объединенном каталоге «Пресса России» № 12025.