How to determine the failure of the Aerial Lifts
Aerial Liftss, lifting freight Aerial Liftss, and hydraulic lifts belong to hydraulic machinery equipment. Today, there are many types of lifting machinery and equipment. From the budding stage to the prototype, from the prototype to the finished product, to today's high-quality and high-level Aerial Liftss, the research on Aerial Liftss has been uninterrupted from ancient times to the present, constantly innovating and replacing the old. So far, domestic enterprises of this product have been It has grown from seven or eight at that time to several hundred now.
We all know that the Aerial Lifts is a kind of hydraulic equipment, which is more prone to failure. Today, the machinery will introduce some practical fault diagnosis methods to you.
(1) LISTEN. Use hearing to judge whether the hydraulic system is working normally. First, listen to the noise, listen to whether the noise of the hydraulic pump and hydraulic system is too large, the characteristics of equipment noise, whether there is a squeal of pressure control components such as relief valve and sequence valve; second, listen to the impact sound, listen to the hydraulic cylinder of the workbench Check whether the impact sound is too loud when going forward, whether there is a sound of the piston hitting the bottom of the cylinder, and whether the reversing valve hits the end cover when changing direction; three listen to the abnormal sound of cavitation and trapped oil, and check whether the hydraulic pump sucks air, And whether there is serious oil trapping phenomenon. Four listening to the knocking sound, refers to whether there is a knocking sound caused by damage when the hydraulic pump is running.
(2) Smell. Use the olfactory organ to identify whether the oil is smelly or deteriorated, and whether the rubber parts emit a special odor due to overheating.
(3) touch. Touch the moving parts that are allowed to touch with your hand to understand their working status. As soon as you touch the temperature rise, touch the surface of the hydraulic pump, fuel tank and valve components with your hands. If you feel hot after touching for two seconds, you should check the cause of the high temperature rise. Second, touch the vibration, touch the vibration of moving parts and pipelines by hand, and check the cause if there is high-frequency vibration. Three-touch crawling, when the worktable is moving at a low speed with light load, check whether there is any crawling phenomenon by hand. Fourth, touch the tightness, and touch the tightness of the gear iron, micro switch and fastening screws by hand.
(4) READ. Check the relevant fault analysis and repair records, daily inspection and regular inspection cards, shift records and maintenance records.
(5) ASK. Visit the equipment operator to know the normal operation status of the equipment. Ask whether the hydraulic system is working normally and whether the hydraulic pump is abnormal. Second, ask the hydraulic oil replacement time and whether the filter screen is clean. The third question is whether the pressure or speed regulating valve has been adjusted before the accident, and what are the abnormal phenomena. 4. Ask whether the seals or hydraulic parts have been replaced before the accident. 5. What abnormal phenomena have occurred in the hydraulic system before and after the accident. Six asked what faults often occurred in the past and how to eliminate them.
