Improvement of hydraulic drive cooling system of forklift truck
Used Forklift Supplier shares that, at present, the hydraulic drive cooling system used in forklift truck mostly places the hydraulic drive oil radiator in the engine tube belt radiator water chamber. This way of heat dissipation has the following three problems: first, the beginning of the hydraulic transmission oil temperature is low, oil viscosity, transmission efficiency is low; Second, when the working condition is bad, the hydraulic transmission oil temperature is too high; Third, hydraulic transmission oil and coolant are easy to cross - cavity. In view of the above problems, it is decided to improve the hydraulic drive cooling system of the forklift. The improved hydraulic drive cooling system includes hydraulic torque converter , thermostat and external plate-fin radiator , etc
In order to solve the problem that the hydraulic transmission oil temperature is too low at the beginning of the forklift starting, a thermostat is added in the cooling oil circulation path of the hydraulic transmission cooling system. According to the hydraulic transmission oil temperature, the thermostat can automatically change the hydraulic transmission oil cycle range (large cycle or small cycle), adjust the cooling capacity of the cooling system, ensure the hydraulic transmission gearbox in the appropriate oil temperature range.
Forklift truck started working as hydraulic transmission oil temperature below 70 ℃, hydraulic transmission oil in pulmonary circulation. Under the action of the torque converter pump, the transmission oil enters the thermostat through the outlet of the hydraulic torque converter, and the outlet C of the thermostat is closed. The oil directly returns to the torque converter without passing through the oil radiator, forming a small cycle, so that the hydraulic transmission oil rapidly rises to the appropriate working temperature.
Hydraulic oil temperature rise to 70 ~ 80 ℃, the thermostat oil outlet and oil outlet A C in A state of half open at the same time, this part of the hydraulic transmission oil after the warm oil outlet section C to radiator cooling and then enter the hydraulic torque converter, and the other part of the hydraulic transmission oil directly return to hydraulic torque converter, at the same time to carry on the systemic and pulmonary circulation.
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