automobile Engineering oil cylinder Share with you the type and maintenance of crane truck hydraulic outrigger

The leg support is applicable to vessels installed on rigid foundation and meeting the following conditions: a. Nominal diameter DN400~1600mm; b. The ratio of cylinder length L to nominal diameter DN L/DN ≤ 5; c. Total height of vessel H1 ≤ 5000m. It is not applicable to vessels that are rigidly connected with machines and equipment that generate pulsating loads directly through pipelines. Instead, support types such as skirts should be selected to avoid vibration. If it is confirmed that there is no problem after calculation, it may not be subject to this restriction.

The function of the truck hydraulic outrigger is to provide a large support span for the crane when working without increasing the crane width, so as to improve the lifting characteristics of the truck crane without reducing its mobility. Outrigger failures include mechanical parts and Hydraulic system Two types.

Common faults of outrigger hydraulic system:

(1) The oil circuit leaks. The reason is that the connector is loose, so the position should be found and tightened; The seal is damaged and should be replaced; If the pipeline has cracks, it should be replaced or repaired by welding.

(2) Outrigger retraction and retraction failure. The two-way hydraulic lock is out of order, and the plunger in the lock is stuck and must be removed, cleaned, installed and adjusted; The plunger is severely worn, and the hydraulic lock should be replaced.

(3) The outrigger retracts automatically during lifting. There are two reasons: first, the one-way valve in the two-way hydraulic lock is not well sealed, which should be removed for maintenance, installed and adjusted after cleaning. Second Hydraulic cylinder For internal leakage, it is necessary to remove and check the seals on the piston, replace them with new ones, and then reinstall them.

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