APPLİCATİON OF THE WORKİNG FLUİD İN THE HYDRAULİC TRANSMİSSİON

Abstract

Issues related to the determination of the steady-state temperature of the hydraulic systems of volume hydraulic devices for the stability of the output lane are of great importance. Therefore, it is necessary to know the time for the hydraulic system of the volume hydraulic actuator to reach a stable temperature regime. The transition mode is a complex function of a large number of variables, and at the same time it is necessary that it should be as short as possible, which will save both power consumption and idle operating time of the installation. First of all, the parameters that influence the dynamics of the flow processes of volumetric hydraulic machines are their pressure, hydraulic system, initial temperature of hydraulic equipment, ambient temperature, availability of cooling devices and, as already mentioned above, hydropower coefficients. In this regard, the topic of this paper is relevant, and even a partial, qualitative study of the dynamics of temperature fields can be useful for understanding the physical state of what is happening in hydraulic machines. The hydraulic machine has a high special power for a single mass (7.36-8.83 kW per 1 kg of mass), and even relatively small relative energy losses lead to significant prices for a special heat flux g > 600 kVt/m2. Due to local overheating of individual sections of the surface of the hydraulic machine, a certain part of the heat in unsteady mode is spent on changing the temperature of the housing and its individual components and parts. This article examines the dynamics of the temperature field during operation and extinguishing using the example of the most used gear pump for a positive-position hydraulic machine. Keywords: hydraulic systems, hydraulic equipment, temperature, dynamic mode, working fluid.