The reason why the working speed of the large tonnage 320 tons double acting hydraulic jack gradually decreases or even stop?
2020-03-09 11:52:33
The reason why the working speed of the large tonnage 320 tons double acting hydraulic jack gradually decreases or even stop?
Why is 320 tons hydraulic jack underspeeding and harmful? Now we detail the reasons why the working speed gradually decreases or even stops.
1) The clearance between the 320 tons double acting hydraulic jack and the piston is too large or the 0-shaped seal is damaged, causing the high and low pressure chambers to communicate.
2) Because a certain section of the working stroke is often used during work, the bore diameter of the 320 tons large tonnage hydraulic jack is not linear (there is a waist-drum), which causes the high and low pressure oil at the ends of the large tonnage hydraulic jack to communicate.
3) The oil pressure at the cylinder end is too tight or the piston rod is bent, which increases friction or resistance
4) Excessive leaks cannot be established
5) The oil temperature is too high and the viscosity is too small. The travel speed of the large tonnage double acting hydraulic jack, which is sealed by gaps or poor sealing quality, will slow down; if the ends of the 320 tons double acting hydraulic jack communicate with each other, the speed will gradually decrease until it stops
6) The suction side of the hydraulic pump sucks air, causing the movement of the large tonnage hydraulic jack to be unstable and the speed to drop.
7) Accumulators or insufficient capacity used to increase the speed of 320 tons hydraulic jacks
8) The load of the 320 tons double acting hydraulic jack is too high
9) The cylinder wall of the hydraulic jack swells, and the piston passes through the swollen part, and the outer edge of the piston seal will leak oil. At this time, the speed of the large tonnage hydraulic jack must be reduced or stopped.
10) Foreign matter enters the sliding part, causing burn-in phenomenon and increasing working resistance
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