Created on:2021-09-02 08:48

Port equipment_ Maintenance of car dumper -- composition and working principle of respiratory system in hydraulic station

Port equipment_ Maintenance of car dumper -- composition and working principle of respiratory system in hydraulic station

A port 5# dumper is the key equipment of coal phase IV expansion project. Hydraulic station is an important part of car dumper. Its main body is designed and manufactured by hydraulic technology. The hydraulic system of car dumper is mainly composed of hydraulic station and its oil circuit block, car pressing and parking hydraulic cylinder and its oil circuit block and heating oil circuit block, as shown in Figure y.

Y.jpg

The clamping and fixation of the car is realized through the action of the hydraulic cylinder of the car leaning and pressing. The hydraulic station is mainly composed of oil tank, control oil circuit block, respirator, etc. (see Fig. z). It is the power source to provide pressure and flow for the pressing hydraulic cylinder and the leaning hydraulic cylinder, so as to ensure the reliable fixation of the pressing beam and the leaning plate to the car, so as to realize safe turnover. When the hydraulic cylinder acts, the change of oil volume in the oil tank causes the change of air pressure in the oil tank.

In order to ensure the working stability of the hydraulic cylinder, the constant air pressure in the oil tank is realized by bypassing the breathing of the built-in respirator connected with the main oil tank, as shown in Figure a. When the negative pressure is formed when the oil flows to the hydraulic cylinder and the oil tank, the respirator shrinks to supplement air to the oil tank. When the negative pressure exceeds the set value of the air inlet check valve of the pre pressure air filter, the air inlet check valve opens and the external air enters the oil tank to ensure the internal pressure; When the oil returns to the oil tank and the pressure in the oil tank increases, the air in the oil tank returns to the respirator. When the pressure is too high, release the excess pressure air through the exhaust check valve of the pre pressure air filter.

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