The invention discloses a method for selecting a hydraulic power source of a hydraulic
system. The method comprises the following steps that firstly, a working medium of the hydraulic
system is supplied by the hydraulic source, a
throttle speed adjusting
system is supplied with
hydraulic fluid by a quantitative pump, the
hydraulic fluid supply quantity of a
hydraulic pump is greater than the quantity of
hydraulic fluid required by the system, and the excessive redundant hydraulic fluid flows back to a hydraulic tank through an overflow valve; a volume speed adjusting system is supplied with hydraulic fluid by a variable pump, the
maximum pressure of the system is limited by a
safety valve, the hydraulic
fluid supply quantity of the
hydraulic pump is matched with the quantity of hydraulic fluid required by the system, and in each phase of work circulation, the hydraulic fluid is supplied by multiple pumps; an accumulator is additionally arranged and is used as an auxiliary hydraulic source, an inlet of the pump is provided with a coarse filter, and according to the requirements of protected elements, the hydraulic fluid entering the system is subjected to secondary
filtration by a corresponding fine filter; and a
magnetic filter is arranged on a
hydraulic circuit, and according to the environments of the
hydraulic equipment and the requirements of on temperature raising, the heating and cooling measures are additionally carried out. The method has the beneficial effects that the running precision of the
machine is favorably improved, the abrasion is reduced, the service life is prolonged, the force on the
machine body is assisted, and the like.