For the inlet pressure of two check valves, P1 can be considered as atmospheric pressure, so it is equal.In the same case of P1, the smaller P2, the greater P, and the greater flow Q through the check valve.
It can be seen from the foregoing that the two hydraulic cylinders will not be completely synchronized when starting, so the pressure P2 of the upper chamber of the two cylinders is not the same, and the pressure difference between the two check valves is not the same, so the flow from the cylinder through the check valve into the two cylinders is not the same, which also leads to the movement of the two cylinders is not synchronized.
Conventional faults and troubleshooting methods of hydraulic plate shears
One, how to replace the Hydraulic plate shears conventional pipeline seals?
First put the hydraulic shearing machine on the tool carrier to the lower dead point, then cut off the power supply of the machine tool, loosen the oil seepage part of the pipe to take out the bad seal, and then coated with a layer of butter in the joint groove, and then the new seal is installed in the groove, tighten the pipe, and finally the hydraulic shearing machine for oil filling reset, into normal use.
Two, hydraulic plate shears do not produce working pressure?
1. Check whether the positive and negative rotation of the plate shearing motor and the oil pump is correct.
2, clean the valve core of the safety relief valve of the plate shearing machine.
3, cleaning plate shears hydraulic system of two four-way solenoid valve.
Three, hydraulic shearing machine tool rest return speed is slow
1. Refill the oil to the plate shearing machine once.
2. Check whether there are signs of oil leakage and oil leakage at the connecting parts of the plate shearing machine.
3. Check the nitrogen pressure in the accumulator of the plate shearing machine (normal nitrogen pressure is 4-5MPa,
Please fill nitrogen as soon as possible)
Four, hydraulic shearing machine blade turning and gap adjustment
The blade of the hydraulic shearing machine turns over
Use the shearing Angle smaller button to adjust the upper tool carrier to zero degree, then remove the worktable guide plate loosen the screws fixed on the lower blade, remove the lower blade in order, then loosen the screws fixed on the upper blade, remove the upper blade in order, and then turn over each blade, first install the blade, and then install the blade.Check whether the interface between the blades is smooth and smooth. Finally, fix all blade screws and install the guide plate.
2, hydraulic shears clearance adjustment
Using the two buttons of shear Angle increase and decrease, place the upper blade of the machine tool and both ends of the lower blade to overlap 3-5mm
After adjustment, the machine tool is filled with oil once, the tool holder will reset automatically, and the key button will be dialed
To the shear position and into normal use.