According to the above requirements of the lubrication system, the principle of the lubrication system is drawn. The system mainly includes a hydraulic circuit, a lubrication circuit, a lubricating oil heating circuit, and a lubricating oil cooling circuit.
1- Hydraulic oil tank; 2, 10-oil suction filter; 3- Engine; 4- variable pump; 5- multi-way valve; 6, 18- relief valve; 7- Lubricating oil tank; 8- lubricating oil heating motor; 9- Lubricate the motor; 11- lubricating oil heating pump; 12- Lubrication pump; 13-double filter; 14- Radiator; 15, 23- Pressure sensor; 16-S2 axis flow sensor; 17-S1 axis flow sensor; 19- Oil return temperature sensor; 20-position liquid level switch; 21- Oil return filter; 22- Heating relief valve; 24- Lubricating oil tank temperature sensor.
1.2.1 Hydraulic circuit
The hydraulic circuit is the power source of the lubrication circuit, lubricating oil heating circuit and lubricating oil cooling circuit of the lubrication system. Variable pump 4 takes the force engine 3, provides the maximum pressure oil for the system, and controls the lubricating motor 9, lubricating oil heating motor 8 and lubricating oil cooling motor respectively through the multi-way valve 5 to achieve bearing lubrication, lubricating oil heating and cooling functions. Among them, the multi-way valve 5 is composed of a lubricating solenoid valve, a heating solenoid valve and a heat dissipation proportional valve, and the linkage does not affect each other; The hydraulic circuit is equipped with relief valve 6 to realize overload protection.
1.2.2 Lubrication circuit
Lubricating pump 12 is driven by lubricating motor 9, lubricating oil is pumped by lubricating pump 12 and then flows through double barrel filter 13 and radiator 14, and enters S1 shaft and S2 shaft respectively in two ways, lubricating oil lubricates and dissipates heat from the bearing and flows out from the bottom of the shaft, and returns to the oil tank through the oil return filter 21. Among them, the double barrel filter 13 is redundant design, when one of the blocked system can still work normally % relief valve 18 limit the system pressure does not exceed the set value, which plays an overload protection role; Oil return filter 21 Filters particles from wear to prevent re-entry into the system and damage to lubricating elements. At the same time, when the pressure sensor is set in the pipeline, the heat dissipation proportional valve signal is increased to accelerate the cooling, and the lubricating oil temperature is controlled within the set range.
peroration
Compared with the fixed thin oil lubrication system, this system has the following advantages:
① Full hydraulic drive, with the rest of the mobile sand making machine actuator share hydraulic, compared with the motor drive small volume, no risk of electric shock, * suitable for mobile equipment.
(2) Hydraulic overflow heating is used to replace traditional electric heating. The heating speed is fast, the starting time is shortened, the safety is high, and the oil quality is not changed [4].
③ The lubricating oil temperature is closed-loop control, the control accuracy is *, the cooling fan can achieve stepless speed regulation, and the heat dissipation effect is good.
(4) Using the control and display hardware of the mobile sand making machine itself, real-time monitoring of the system status, with fault display and alarm functions, and no additional cost.
