The overheating of the internal combustion engine cooling system highlights the disadvantages of the internal combustion

[DIG-DOG]

1. Internal combustion engine system

The internal combustion engine includes water pump, fan pulley (including active and passive), internal combustion engine (cylinder liner), fan belt, thermostat, etc. If the pump is not working properly or the center distance between the active wheel and the passive wheel of the fan pulley is incorrect, the internal combustion forklift will cause the belt to slack and slip, and the speed of the passive wheel will decrease, the speed of the pump will decrease, and the flow rate of the pump will decrease; Or the pipeline between the cylinder liner of the internal combustion engine is blocked, so that the water is not smooth; Or thermostat failure, so that the entire system water circulation suspension; The above factors will cause the internal temperature of the internal combustion engine to rise sharply, resulting in overheating of the cooling system. In addition, other faults in the internal combustion engine, such as incorrect ignition times, can also overheat the cooling system.

2. Fan system

The fan is generally installed in front of the radiator and is coaxial with the water pump. The role of the fan is to increase the air velocity and flow rate through the radiator to enhance the heat dissipation capacity of the radiator. If the cooling air volume is insufficient or the pulley slips, the heat dissipation effect will be affected.

3, radiator system

The radiator system includes a radiator and an air shield. Forklift, radiator is also called water tank, it is composed of three parts, such as inlet room, outlet room and cooling core. The coolant (water) flows in the radiator core, and the air passes outside the radiator core, so that the heat absorbed by the cooling water from the internal combustion engine can be transferred to the outside air, so that the cooling water temperature drops to cycle again. The role of the air shield is to make the air absorbed by the fan pass through the radiator to improve the efficiency of the fan. If the pipe in the radiator core is blocked or the welding or welding between the pipe and the heat sink is removed, the heat dissipation performance will be greatly reduced. At the same time, during the transportation, assembly and use of the radiator, the heat sink on the radiator core is easy to be damaged, which reduces the air area, increases the wind resistance, and reduces the heat dissipation performance. If the air shield is damaged or the gap between the fan and the radiator is too large, the fan cannot all enter the air shield, causing air loss and affecting the heat dissipation performance.

4. Other reasons

If the air outlet of the forklift is too small after the counterweight, the hot air cannot be discharged in time and backflows back, and the components of the forklift are heated twice, which causes the cooling system to overheat. If the center of rotation of the fan is different from the center of the radiator, the utilization rate of the radiator area decreases, and the heat dissipation capacity also decreases. If the cooling system leaks, the water in the radiator is insufficient, it can not make full use of the entire cooling area of the radiator, affecting the play of the cooling capacity, when the water is reduced to a certain extent, the cooling system will overheat.

The internal combustion engine maintenance of internal combustion forklift shows its disadvantages

In addition to the advantages of low noise and no exhaust emissions, electric forklifts also have the advantages of low use and maintenance costs compared with internal combustion forklifts.

Cost of use: The cost of electricity consumption is much lower than the cost of petroleum gas or diesel consumption. Some people do a calculation, with a load capacity of three tons of forklifts to sit on the comparison, according to 250 working days a year, the electric forklift electricity consumption of money and diesel forklift consumption of money compared to save 14,000 yuan of energy costs, which is not a small number. In addition, the electric forklift operation control is simple and flexible, the operation is much easier than the the internal combustion forklift , and the operation intensity of the operator is also reduced, so that not only the use cost is reduced, but also the work efficiency is improved.

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