To solve the problem of crawling jacks, we must first identify the possible causes of crawling, and then remedy the situation, can be resolved.
(1) Check if there is a negative pressure inside the hydraulic cylinder. Air will enter the gap.
(2) The crawling phenomena caused by the quality problems of the hydraulic cylinder itself, such as the poor assembly and installation of the hydraulic cylinder, poor coaxiality of the piston rod and the piston, the full length or partial bending of the piston rod, and the poor linearity of the cylinder bore.
(3) In the cylinder body, due to foreign matter and moisture entering people, there are phenomena such as local strain and burning. The frictional resistance increases at these positions, so that the hydraulic cylinder cannot move smoothly and the crawling of the partial stroke section occurs.
(4) Because the buffer mechanism improperly generates a creeping buffer stroke in the buffer stroke, the hydraulic cylinder also moves at a low speed. If the buffer mechanism is poorly designed or processed, or improperly adjusted, the hydraulic cylinder may crawl within the buffer stroke.
The reasons for the crawling in the buffer stroke are buffer structure and other reasons. The specific judgment method is: when adjusting the size of the throttle opening of the buffer device, the crawling phenomenon disappears when the opening is large, and crawling occurs after the closing time, which proves that the crawler device is crawling; whether it is when opening the large and small buffer adjusting screws If crawling does not disappear, it can be judged by other reasons.
(5) Crawling due to sealing causes, such as tightness of the seal adjustment, crawling, etc., due to excessive compression margin.
(6) Check other reasons such as large friction rails, poor guide rail lubricating oil stabilizer, capillary tube throttle of hydrostatic guide rails, etc. due to dirt or other reasons, may cause crawling.
(1) Check if there is a negative pressure inside the hydraulic cylinder. Air will enter the gap.
(2) The crawling phenomena caused by the quality problems of the hydraulic cylinder itself, such as the poor assembly and installation of the hydraulic cylinder, poor coaxiality of the piston rod and the piston, the full length or partial bending of the piston rod, and the poor linearity of the cylinder bore.
(3) In the cylinder body, due to foreign matter and moisture entering people, there are phenomena such as local strain and burning. The frictional resistance increases at these positions, so that the hydraulic cylinder cannot move smoothly and the crawling of the partial stroke section occurs.
(4) Because the buffer mechanism improperly generates a creeping buffer stroke in the buffer stroke, the hydraulic cylinder also moves at a low speed. If the buffer mechanism is poorly designed or processed, or improperly adjusted, the hydraulic cylinder may crawl within the buffer stroke.
The reasons for the crawling in the buffer stroke are buffer structure and other reasons. The specific judgment method is: when adjusting the size of the throttle opening of the buffer device, the crawling phenomenon disappears when the opening is large, and crawling occurs after the closing time, which proves that the crawler device is crawling; whether it is when opening the large and small buffer adjusting screws If crawling does not disappear, it can be judged by other reasons.
(5) Crawling due to sealing causes, such as tightness of the seal adjustment, crawling, etc., due to excessive compression margin.
(6) Check other reasons such as large friction rails, poor guide rail lubricating oil stabilizer, capillary tube throttle of hydrostatic guide rails, etc. due to dirt or other reasons, may cause crawling.
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