This article mainly introduces:

Norway hydraulic cylinder,spring return cylinder manufacturer,spring return cylinder

(Norway spring return cylinder,produced by Hengyu Hydraulic Co., Ltd）

spring return cylinder are widely used in Norway，because of long service life，smooth movement，high work efficiency.So our company has designed spring return cylinder for customers from Norway.

Introduction to spring return cylinder:

The viscosity of the working oil used in the spring return cylinder is 29~74mm2/S, and ISO VG46 anti-wear hydraulic oil is recommended. Working oil temperature within the range of -20~80. C. When the ambient temperature and service temperature are low, the oil with lower viscosity can be selected.

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

In order to ensure the service life of the spring return cylinder, the medium used must not be mixed with impurities and stolen goods, so as to avoid scratching the inner arm of the spring return cylinder, causing damage to the seal and causing leakage in the spring return cylinder. It is required that the filtration accuracy of the system is not less than 80μm, the oil pollution is strictly controlled, the hydraulic oil is kept clean, the performance of the hydraulic oil is regularly checked, and the necessary fine filtration or replacement of the new working hydraulic oil is carried out.

Improve the service life of the spring return cylinder: it is necessary to maintain the normal clearance of the combined surface of the hydraulic components. When manufacturing or repairing the main parts of the spring return cylinder (such as the spring return cylinder block, piston rod, etc.), the assembly should be carried out in accordance with the tolerance lower limit of the assembly size, which can well reduce the occurrence of cavitation. If cavitation has occurred in the hydraulic components, only metallographic sandpaper polishing technology can be used to remove cavitation pitting and surface carbon deposits, and general fine sandpaper must not be used for polishing After the spring return cylinder is repaired, the hydraulic system should run smoothly for a certain period of time so that the hydraulic oil in the hydraulic system can be fully circulated; If necessary, the spring return cylinder inlet pipe (or return pipe) can be disassembled. Make the hydraulic oil overflow to achieve the effect of single spring return cylinder exhaust.

Answers to some questions about spring return cylinder:

What is the cause of the sound of the excavator arm cylinder?
Hydraulic excavator cylinder includes boom cylinder, bucket rod cylinder and bucket cylinder, four cylinders. The sound of boom cylinder may be the wear of hydraulic cylinder block bushing, piston rod bushing and shaft pin. The main reason: poor lubrication, followed by improper clearance in the assembly process. Countermeasures: (1) Strictly lubricate each shaft pin at least once every 8 hours when the excavator is initially used for 100 hours and under harsh conditions; In other working conditions, lubricate each pin at least once every 50 hours. (2) If the lubricating oil passage is found to be blocked, it must be stopped for rectification. (3) Require assembly, replacement of all parts of the shaft pin, bushing strictly comply with the assembly testing standards and operating procedures.

What is the difference between hydraulic piston cylinder and plunger cylinder?
The force surface of the piston cylinder is a rod cavity and a rodless cavity, and the force surface of the plunger cylinder is the plunger, the spring return single-acting piston cylinder can also rely on the external force of the spring to achieve return, the double-acting piston cylinder can produce tension, and the plunger cylinder only produces thrust without tension.