Fault diagnosis and maintenance of packer hydraulic system
Fault diagnosis and maintenance of packer hydraulic system
Hydraulic baler is a kind of hydraulic equipment which is specially used to pack waste paper after pressing. A JB hydraulic packer of a company is imported from France, and its fault analysis is as follows.
(1) Hydraulic system diagram and main features of JB baler
The hydraulic system of JB baler is shown in Figure Q.
The hydraulic system of baler is mainly composed of hydraulic pump station, hydraulic pipeline system, down pressure cylinder and paper pushing cylinder. The hydraulic pump station is also composed of oil tank, hydraulic pump group, filter cooling system, etc. The action of down pressure cylinder and paper pushing cylinder depends on hydraulic pressure. When the hydraulic cylinder does not work, the pressure oil of each hydraulic pump can be unloaded through the middle function of the electromagnetic relief valve or the directional valve. When the electromagnet of solenoid valve 17 loses power, the hydraulic cylinder can realize free falling and fast descending function through valve 18. In the free falling stage, the filling oil tank can quickly replenish oil to the left chamber of the paper pushing cylinder through the filling valves 7 and 9. The combined form of multi pump oil supply and separate unloading is adopted for the downforce cylinder to meet the requirements of fast, slow and other operating speed. Each one-way throttle valve can adjust the operating speed or buffer speed of the cylinder, and the cooling system can strictly control the oil temperature.
The characteristics of the baler hydraulic system are as follows.
(2) Fault and analysis of hydraulic system of baler