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Causes and treatment methods of hydraulic cylinder failure of lifting platform

by:Powerston     2021-08-02
The hydraulic cylinder is the main component that converts hydraulic energy into mechanical energy in the hydraulic system of the lifting cage platform. The hydraulic docking bridge is a special auxiliary equipment for fast loading and unloading of goods. Its height adjustment function enables a bridge between the truck and the cargo platform of the warehouse. The forklift and other handling vehicles can directly drive into the truck for bulk loading and unloading through it. Called the loading and unloading platform. The failures can be summarized as hydraulic cylinder failure, failure to push load failure, piston sliding failure, etc. Due to the failure of the hydraulic cylinder, the equipment is usually shut down. Therefore, attention should be paid to the cause and maintenance of the failure of the hydraulic cylinder. Sliding or heavy pressure of the hydraulic cylinder piston will make the hydraulic cylinder work unstable.  1 Cylinder inside: improper assembly of parts in the hydraulic cylinder, deformation, wear or position tolerance of the parts, and excessive movement resistance. The piston speed of the hydraulic cylinder changes with the change of the stroke position, which leads to the increase of the piston speed. The main reason is poor assembly quality of parts, surfaces or iron filings produced by sintering, increased resistance and reduced speed.  2, the hydraulic cylinder bore is poorly lubricated or poorly processed: due to the relative movement of the piston and cylinder, guide rail and piston rod, if the lubrication is not good or the diameter of the hydraulic cylinder is too poor, it will wear out. Decrease the straightness of the cylinder. In this way, when the piston is working in the hydraulic cylinder, the frictional resistance will be large and small, resulting in greater resistance or greater friction. The troubleshooting method is to repair the hydraulic cylinder first, then prepare the piston according to the matching requirements, then process the piston rod and configure the guide sleeve.  Hydraulic pump or hydraulic cylinder enters the air: Air compression or expansion will cause the piston to slip or deform. Elimination measures are to check the hydraulic pump, set up a special exhaust device, and quickly operate the full stroke multiple times to exhaust.  The sealing quality is directly related to sliding or sliding. The hydraulic docking bridge is a special auxiliary equipment for fast loading and unloading of goods. Its height adjustment function enables a bridge between the truck and the cargo platform of the warehouse. The forklift and other handling vehicles can directly drive into the truck for bulk loading and unloading through it. Called the loading and unloading platform. When the O-ring is used under low pressure, compared with the U-ring, the difference between dynamic and static frictional resistance is larger due to the higher surface pressure. Easy to slip or tilt; the surface pressure of the U-shaped ring increases with the increase of pressure. Although the sealing effect is also increased, the static and static friction resistance difference also increases, and the internal pressure increases, which affects the elasticity of the rubber, due to the contact resistance of the lip The increase of the seal ring and the elongation of the lip is also easy to cause or, in order to prevent its deformation, a support ring can be used to maintain its stability.  II or action failure  1, core plug or hole: When the flow or direction valve core is stuck or the hole is blocked, the hydraulic cylinder is easily damaged or fails. At this point, check the oil contamination; check whether dirt or secondary sediments stick to the valve core or block the valve hole; check the wear of the valve body.  2, the piston rod is glued to the cylinder or hydraulic cylinder: At this time, the cylinder will not move or move very little under any circumstances. Check whether the piston and connecting rod seals are too tight, whether dirt and deposits have entered: whether the piston rod and cylinder axis are correct, and whether the easily damaged parts and seals are invalid.  The control pressure of the hydraulic system is too low: the resistance of the control pipe is too large, the flow valve is not adjusted properly, the control pressure is not suitable, and the pressure source is disturbed. The hydraulic docking bridge is a special auxiliary equipment for fast loading and unloading of goods. Its height adjustment function enables a bridge between the truck and the cargo platform of the warehouse. The forklift and other handling vehicles can directly drive into the truck for bulk loading and unloading through it. Called the loading and unloading platform. At this time, the control pressure source should be checked to ensure that the pressure is adjusted to the specified value of the system.   Air intake in hydraulic system: Mainly due to system leakage. At this time, check the liquid level of the tank, the seal and pipe joints on the suction side of the hydraulic pump, and the oil suction coarse filter is too dirty. If this is the case, hydraulic oil should be treated, seals and pipe connections should be treated, and coarse filter elements should be cleaned or replaced.
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