Why does the air pressure in the fuel tank of the electric forklift rise sharply?

There are quite a lot of components in electric pallet stacker. If there is a problem with a certain part, it may not be used normally. Our electric pallet truck hydraulic oil tank is a common open structure in the industry. The gas in the oil tank passes through the respirator and the atmosphere. In the same way, when the oil return pipe returns to the oil, the excess air in the fuel tank is discharged through the respirator. Preliminary analysis of the reason for the fuel injection is that the ventilation of the respirator is insufficient, but after removing the respirator and working for a period of time, the problem still exists. Remove the fuel cap for testing. After working for a period of time, the hydraulic oil is sprayed directly from the fuel cap.

The brake pump, steering gear, multi-way valve and gantry cylinder oil return pipe are all arranged above the hydraulic oil level, and the pipe is facing the steel oil suction pipe. On-site observation found that when the working device descended with load, a large amount of oil quickly returned to the oil, and after passing through the mouth of the oil return pipe, it was sprayed to the oil suction pipe at a high speed, forming a violent splash. After the temperature of the hydraulic oil rises, a large number of oil droplets and oil mist will be produced in the oil tank, which will cause the air pressure in the oil tank to rise sharply. These oils, oil droplets and oil mist are quickly discharged through the respirator. Due to the blocking effect of the filter screen, oil droplets and oil mist accumulate more and more on the filter screen when passing through the respirator. Under the action of the pressure difference between the inside and outside of the fuel tank, the hydraulic oil is ejected from the respirator at a high speed.

Because of the above problems in the hydraulic oil tank, after research, the position of the oil return pipe on the hydraulic oil tank is rearranged. The specific method is as follows:

The brake pump oil return pipe, steering gear oil return pipe and multi-way valve oil return pipe that frequently return oil are all arranged below the hydraulic oil level, and the position of the oil return port and the oil suction pipe Stagger each other and keep these return ports as far away from the breather as possible. After rearranging the above-mentioned oil return pipes of this type of lithium pallet truck, the three oil return ports with frequent oil return are below the liquid level, which avoids the high-speed oil return hitting the oil suction pipe to produce oil droplets or oil mist, and the oil spraying phenomenon of the fuel tank respirator disappears. In addition, this improvement also has a certain protective effect on the hydraulic components, and can also prolong the service life of the hydraulic oil.

The seasonal maintenance of electric pallet stacker is also required, especially in autumn and winter, when there are many dew drops, the pallet stacker are often very wet. rust. Due to the corrosion of acid rain and summer rain, and direct sunlight in summer, the paint surface of the car body will inevitably oxidize.

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