Research on transmission hydraulic system gear pump low-temperature working characteristics

This paper is oriented to the future of low-temperature working conditions of the hydraulic system on the environmental temperature adaptability of the new requirements, to carry out the hydraulic system gear pump load characteristics of the study. For the physical parameters and operating temperature range of the oil used in the system, the "viscosity-temperature"characteristics of the oil are established, a general mathematical model of the theoretical instantaneous flow rate change with the position of the meshing point and the gear angle is established based on the method of volume change, and the method of computational fluid dynamics (CFD) is adopted to study the load characteristics of the core hydraulic components in an extremely cold environment, including pressure, flow, and other operating characteristics. The working characteristics of the transmission hydraulic system in the extreme cold region under different working conditions and the future direction of hydraulic system improvement are explored.