| Three - way machine hydraulic cylinder common faults
There are two main reasons for the hydraulic cylinder of the three-way machine: one is the cylinder that has just been repaired or the cylinder that has been placed for a long time. When it is used, it appears to be creeping. Sometimes, it can also see the foam-like hydraulic oil overflow in the hydraulic tank.Second, the mechanical resistance is too large, it is necessary to dismantle the cylinder, live cold and piston rod.
Cylinder thrust lack, there is a load when the cylinder does not move.Can do the following experiments: in the empty load of the cylinder to operate the reversing valve, if the cylinder can be elastic from the mountain, and sometimes the speed of the extension and retraction is faster than normal, it can be determined that the cylinder is wrong.The oil seal and support ring on the piston are severely damaged due to the impurities or iron chips entering the cylinder, so that the rod cavity and the rodless cavity of the cylinder are connected, forming a differential circuit.
Oil leakage, in addition to the external oil leakage caused by the damage of the connecting oil pipe and the O-ring of the oil pipe, the internal oil leakage caused by the sealing failure of the piston rod on the cylinder head is also a more common problem.
Pull cylinder, hydraulic cylinder is mainly because the wear ring between the piston and the cylinder is too worn to make the piston and the cylinder directly touch, the piston hardness is greater than the cylinder hardness, the piston will cut the cylinder and lead to the cylinder.After the cylinder is pulled, the hydraulic cylinder is raised and lowered weakly. If the cylinder is pulled seriously, the cylinder becomes invalid.
Deformation, the deformation of the hydraulic cylinder is mainly due to the impact of external force or overload.
Hydraulic cylinder piston rod is damaged, such as the piston rod is scratched by an external object or the piston rod surface is communicated with the hollow cavity.On.Exit the control system program first, and then cut off the power supply.
Hydraulic system and electrical control system of three-way machine
The hydraulic power mechanism of the three-way machine is installed on the top of the fuselage, which is composed of oil pump, motor, cartridge valve integrated block and oil tank, etc. The power mechanism includes oil filtration, cooling, oil temperature and oil level display and other devices.The main oil pump is a constant power input plunger pump, and the output flow can change with the change of pressure.
Electric control system of the three-way machine: the three-way machine is equipped with an independent electrical control cabinet, and the main operation button station is suspended on the fuselage.The three-way machine adopts PLC controller.The three-way electromechanical source is AC380V, the 50Hz control power supply is AC220V, and the valve electromagnet power supply is DC24V.
Tee machine can produce carbon steel, alloy steel, stainless steel, copper and so on.
1907-19012.
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