This article mainly introduces:

Panama hydraulic cylinder,retractable cylinder manufacturer,retractable cylinder

(Panama retractable cylinder,produced by Hebei Hengyu company）

retractable cylinder are widely used in Panama，because of simple structure and reliable operation，excellent temperature resistance，no transmission clearance.So our company has designed retractable cylinder for customers from Panama.

Introduction to retractable cylinder:

The definition of the minimum starting pressure of the retractable cylinder refers to the minimum working pressure of the retractable cylinder in the no-load state, which is a comprehensive index reflecting the manufacturing and assembly accuracy of the retractable cylinder parts and the size of the sealing friction.

Do not regularly check the damage of the chrome layer of the retractable cylinder: completely extend the retractable cylinder and carefully check whether there is any surface damage such as injury, strain, welding slag, such as the surface damage position, in the retractable cylinder block < 20cm, and the damage depth < 5mm, should be repaired in time to prevent long-term damage to the retractable cylinder seal. Welding slag is strictly prohibited on the surface of the retractable cylinder.

The piston seal of the retractable cylinder is the main element to prevent leakage in the retractable cylinder. For the lip seal, it should focus on checking whether the lip edge is bruised and worn, and for the combination seal, it should focus on checking the wear of the sealing surface, and then determine whether the seal can be used. In addition, it is necessary to check whether the static seal between the piston and the piston rod is crushed. The piston rod seal should focus on checking the wear of the seals and supporting rings.

If the retractable cylinder is sliding or crawling (stop and go), check whether there is any astringency inside the retractable cylinder. The internal parts of the retractable cylinder are improperly assembled, the parts are deformed, worn or the shape and position tolerance is excessive, and the action resistance is too large, so that the piston speed of the retractable cylinder changes with the different stroke position, and there is slip or crawl. Most of the reasons are due to poor assembly quality of parts, surface scars or sintered iron filings, so that the resistance increases, the speed decreases. For example, the piston is different from the piston rod or the piston rod is bent, the retractable cylinder or the piston rod is offset from the mounting position of the guide rail, and the sealing ring is too tight or too loose. The solution is to repair or adjust, replace damaged parts and remove iron filings. At the same time, check whether the lubrication is good or whether the retractable cylinder bore processing is out of whack. Because the piston and retractable cylinder, guide rail and piston rod are relative If the retractable cylinder is crawling seriously, check whether air has entered the hydraulic system. Air compression or expansion can cause the piston to slip or crawl. The exclusion measures are to check the hydraulic pump, set up a special exhaust device, and quickly operate the exhaust several times in the full stroke. Check the seals at the same time, because the quality of the seals is directly related to slippage or crawling. When the O-ring is used under low pressure, compared with the U-ring, it is easy to slip or crawl because of the higher surface pressure and the larger difference between static and static friction resistance. The surface pressure of the U-shaped sealing ring increases with the increase of pressure, although the sealing effect is correspondingly improved, but the difference between static and static friction resistance is also larger, the internal pressure increases, affecting the rubber elasticity, due to the increase in the contact resistance of the lip, the sealing ring will tip over and the lip elongation, and it is also easy to cause slip or crawling retractable cylinder weight composition and calculation. The weight of the retractable cylinder is composed of the retractable cylinder diameter, the outer diameter and weight of the retractable cylinder, the rod diameter, and the weight of the accessories, so in calculation, it is to add all these together to get the specific value. However, if there are special circumstances, it may be calculated separately. This work can be carried out by yourself, but it can also be carried out by professionals, so that mistakes can be avoided.

Answers to some questions about retractable cylinder:

Why can't the hydraulic cylinder be pulled back after pushing to the limit?
May be long-term use to the limit position, resulting in serious wear caused! The solution is to add the stroke switch or disassemble and add gaskets before and after the piston.

Why should the piston rod of the hydraulic cylinder be so precise? If you hope the cylinder has a long service cycle, then all parts need to be high-precision, not only the piston rod, but also the cylinder, the sealing groove, the surface roughness, the cylinder looks very simple. Any hydraulic factory can produce the cylinder, but the good cylinder is difficult to produce.