This article mainly introduces:

Congo hydraulic cylinder,hollow cylinder manufacturer,hollow cylinder

(Congo hollow cylinder,produced by Hebei Hengyu company）

hollow cylinder are widely used in Congo，because of clever hydraulic energy conversion，simple structure and reliable operation，powerful torque.So our company has designed hollow cylinder for customers from Congo.

Introduction to hollow cylinder:

The internal leakage of the hollow cylinder is an important indicator to measure the quality of the hollow cylinder: the internal leakage of the hollow cylinder will reduce the volumetric efficiency, increase the temperature rise of the oil, affect the positioning accuracy of the hollow cylinder, so that the hollow cylinder can not accurately and stably stop in a certain position of the hollow cylinder, so it is one of the main indicators of the hollow cylinder.

The commonly used buffer structure of the hollow cylinder is composed of a piston boss and a hollow cylinder head groove. When the piston moves close to the hollow cylinder head, it gradually enters the groove, and the oil in the groove is extruded through the gap between the boss and the groove, which increases the oil return resistance, produces the braking effect and realizes the buffer. Generally, a buffer mechanism should be used when the pressure is above 10MP.

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

If the hollow cylinder slips or crawls, please check whether there is astringency inside the hollow cylinder, because the internal parts of the hollow cylinder are improperly assembled, the parts are deformed, worn or the shape and position tolerance is excessive, the action resistance is too large, so that the piston speed of the hollow cylinder changes with the different stroke position, and the slip or crawl occurs. 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 hollow 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.

Answers to some questions about hollow cylinder:

Why the lifting cylinder falling by itself?
May be there is a pressure relief point. Check and repair the following parts: whether there is oil leakage in the transparent pipe at the top of the cylinder: the cylinder oil seal is broken, and the cylinder and oil seal need to be replaced; No: The multiway valve has pressure relief and needs to be repaired. Maintenance in accordance with routine maintenance items can reduce mechanical failures: 1. Check whether the thermostat works normally. 2, check the transmission shift work is normal. 3. Check the tightness of the fan belt. 4, check whether the diesel tank oil inlet filter is blocked or damaged, and clean or replace the filter. 5. Check and adjust the valve clearance.

How does the self-locking cylinder work?
Hydraulic cylinder self-locking is divided into oil self-locking and mechanical self-locking. The oil circuit itself is equipped with a valve to maintain pressure, so that the hydraulic oil of the cylinder does not return to the tank, and the oil chamber of the cylinder is filled with a certain pressure of oil. However, this pressure holding self-locking is not very safe and reliable, and the plunger will slowly return if there is a leak. Mechanical self-locking is to install a nut on the plunger of the cylinder, and when the cylinder rises to the required position, the nut on the cylinder plunger is rotated to the end, and the cylinder block is in contact, so that the plunger will be fixed to the required height. When it is necessary to relieve the pressure, screw the nut on again and let the plunger return to the position. This kind of cylinder has a special name, called self-locking hydraulic cylinder.