This article mainly introduces:

Pakistan hydraulic cylinder,retractable cylinder manufacturer,retractable cylinder

(Pakistan retractable cylinder,produced by Hengyu Hydraulic Co., Ltd）

retractable cylinder are widely used in Pakistan，because of smooth movement，high work efficiency，excellent fatigue and impact resistance.So our company has designed retractable cylinder for customers from Pakistan.

Introduction to retractable cylinder:

If it is found that the retractable cylinder lubrication is poor or the retractable cylinder bore processing is abnormal, it is necessary to feedback the situation to the manufacturer, because the piston and the retractable cylinder, the guide rail and the piston rod have relative movement, if the lubrication is poor or the retractable cylinder bore is abnormal, it will aggravate the wear and reduce the straightness of the retractable cylinder center line. In this way, when the piston works in the retractable cylinder, the friction resistance will be large and small, resulting in slip or crawling. The solution is to repair and grind the retractable cylinder first, and then prepare the piston according to the matching requirements, repair and grind the piston rod, and configure the guide sleeve.

The retractable cylinder should be vented: when the retractable cylinder is installed or parked for a long time to work again, the air will penetrate into the retractable cylinder and the pipeline system. In order to prevent the abnormal phenomenon of crawling, noise and heating of the actuator, the air in the retractable cylinder and the system should be discharged. In order to facilitate the removal of air deposited in the retractable cylinder, the oil is best entered and discharged from the highest point of the retractable cylinder. retractable cylinders that require higher motion stability are often equipped with exhaust plugs at both ends. Before working, unscrew the exhaust plug to make the piston go back and forth several times without load in the whole stroke, and the air can be discharged through the exhaust plug. After the air is drained, tighten the exhaust plug before working.

The machining accuracy of the retractable cylinder depends on the level of equipment, production technology and testing means. retractable cylinder processing methods are commonly used in two ways, one is rough boring - fine boring - rolling, generally with 45# seamless steel pipe, this method of processing quality is good, but the cost is high. Another method is to use 20# cold-drawn seamless steel pipe, and then honing, the cost is lower. The piston rod must be adjusted and straightened before processing, and the coating thickness of the piston rod is generally not less than 0.03mm. The piston must be machined in strict accordance with the groove size and tolerance requirements given in the seal manual.

retractable cylinder abnormal sound, hysteresis phenomenon cause and elimination method: the piston rod is extended with abnormal sound and hysteresis, if the retractable cylinder is placed for a period of time, the retractable cylinder may enter the air, and the movement can be normal after dozens of repeated movements. If it still cannot be eliminated, check whether the load is aligned with the axis of the piston rod; Retracted piston rod installation helps to align the load with the piston rod. If the flow is unstable, it will also lead to abnormal movement of the piston rod. Check the relevant components of the hydraulic system.

Answers to some questions about retractable cylinder:

What is the cause of the deep scratch of the cylinder?
The following reasons can cause the cylinder to be scratched. 1: Hydraulic oil containing particulate impurities into the hydraulic cylinder, these particulate impurities stuck between the piston rod and the guide ring (or stuck between the piston and the inner wall of the cylinder), when the piston movement in the cylinder will scratch the piston rod, the phenomenon of the inner wall of the cylinder, the more particles, the larger the scratch marks the deeper and more obvious. 2: The body of the cylinder itself. Due to assembly or design reasons, the coaxial error between the piston rod, piston, cylinder, guide ring and other parts is too large, or the cylinder, piston rod straightness error is too large, so that the piston rod and the guide ring interference between the cylinder, this mechanical interference will certainly lose the piston rod or cylinder wall.

How to calculate hydraulic cylinder flow?
Effective area of the cylinder x stroke = volume usually in liters. Volume/estimated total travel time (converted to minutes) = oil flow rate.