This article mainly introduces:

Holland hydraulic cylinder,Lifting cylinder manufacturer,Lifting cylinder

(Holland Lifting cylinder,produced by Hengyu Hydraulic Co., Ltd）

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

Introduction to Lifting cylinder:

Improve the service life of the Lifting 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 Lifting cylinder (such as the Lifting 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 Lifting 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 Lifting cylinder inlet pipe (or return pipe) can be disassembled. Make the hydraulic oil overflow to achieve the effect of single Lifting cylinder exhaust.

The method of sleeve Lifting cylinder to improve the processing quality: there is a big gap in the service life of post-plating polishing and post-plating polishing, especially in mass production. Strictly clean the flying edge and burr of mechanical components, especially the edge of the sealing groove, and the tiny metal burr, strictly clean before assembly. The surface fatigue strength and stress corrosion resistance of the Lifting cylinder can be significantly improved by rolling in the finishing of the inner holes of the Lifting cylinder. The roughness of the surface of the friction pair is generally controlled between Ra0.4 and 0.8.

Lifting cylinder and hydraulic station selection: Select the type and structure of the Lifting cylinder according to the operation requirements of the main engine. According to the external load force borne by the Lifting cylinder, such as gravity, friction force of the external mechanism, inertia force and working load, determine the load change law of the Lifting cylinder in each stage of the stroke and the power value that must be provided. Determine the diameter of the piston and piston rod according to the working load of the Lifting cylinder and the selected oil working pressure. the flow rate of the hydraulic pump is determined according to the movement speed of the Lifting cylinder, the diameter of the piston and the piston rod.

Analysis of commonly used seals: The wear ring and slip ring commonly used on the Lifting cylinder are generally made of polytetrafluoroethylene + graphite, because pure polytetrafluoroethylene is easy to produce plastic creep, which is only suitable for low pressure and low wear resistance conditions. If the sealing ring used is a composite material formed after adding graphite filler, the performance can be effectively improved, the ability to resist plastic creep is increased by 2 to 3 times, the initial deformation caused by the load is reduced by 30 to 60% : the rigidity is increased by 2 to 3 times: the dimensional stability under heat is increased by 2 times, and the hardness is increased by l0 to 15%.

Answers to some questions about Lifting cylinder:

What should we pay attention to when using the cylinder?
When using the cylinder, we should pay attention to the environment and temperature in which it is located as follows: 1. Before working, the hydraulic cylinder must carry out several reciprocating movements under low pressure (greater than the starting pressure), and work normally after removing the gas in the cylinder. 2. Precautions when removing the hydraulic cylinder: ① The pressure in the hydraulic circuit is reduced to zero before disassembly. ② The screw thread at the top of the piston rod should be prevented from damage when disassembling. ③ Due to the different structure and size of the hydraulic cylinder, the order of disassembly is also slightly different. Generally, the fastening bolt of the end cover should be loosened first. Internal card chain card key application special tools.

Does the excavator use a hydraulic cylinder?
First, construction machinery is generally a hydraulic cylinder. Second, hydraulic transmission equipment is usually composed of four components, power, execution, control and auxiliary. And the hydraulic cylinder as a linear reciprocating motion or less than 360. Reciprocating motion of the hydraulic mechanism, simple structure, reliable work, is also widely used in the hydraulic system of the main actuator, it is the prime mover in the form of mechanical energy to drive the hydraulic pump produced by the liquid pressure energy, and then can be directly driven load for reciprocating movement or less than 360.