This article mainly introduces:

Greece hydraulic cylinder,spring return cylinder manufacturer,spring return cylinder

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

spring return cylinder are widely used in Greece，because of high work efficiency，excellent fatigue and impact resistance，no need for deceleration device.So our company has designed spring return cylinder for customers from Greece.

Introduction to spring return cylinder:

When installing the spring return cylinder, the axial ends of the spring return cylinder cannot be fixed. Due to the effect of liquid pressure and thermal expansion in the spring return cylinder, there is axial expansion. If the two ends of the spring return cylinder are fixed, all parts of the spring return cylinder will be deformed. When disassembling the spring return cylinder, it is strictly forbidden to hammer the spring return cylinder and the piston surface, such as the spring return cylinder hole and the piston surface is damaged, do not allow sandpaper grinding, to use a fine oil stone carefully grinding. The clearance between the guide sleeve and the piston rod should meet the requirements.

The spring return cylinder body is commonly made of No. 20, 35, 45 seamless steel pipe, and the steel pipe is honed or rolled to achieve the roughness requirement within 0.4μm. The low pressure spring return cylinder can use 20 steel pipe, and the high pressure spring return cylinder can use 45 steel pipe.

The piston rod and guide sleeve function of the spring return cylinder is crucial: the relative motion pair between the piston rod and the guide sleeve is the main factor causing external leakage, if the chrome layer on the surface of the piston rod is spalling or producing longitudinal tensile marks due to wear, it will directly lead to the failure of the seal.

In the hydraulic system, sometimes the inner layer of the rubber hose is peeled off, so that the oil circuit is on and off, resulting in irregular spring return cylinder action. Troubleshooting method: Replace the rubber hose.

Answers to some questions about spring return cylinder:

How to produce good quality hydraulic cylinder?
According to the principle of quality control, it is considered from five aspects: people, machine, material, method and environment. 1, People, refers to the processing and assembly operators. Their skills, professional qualifications, literacy should meet the requirements of production. For example, do your machining workers have the required grade certificate? Do your welders have welding certificate? 2, Machine, refers to your production equipment. Production cylinders have requirements for processing equipment. For example, the piston rod requires chrome grinding. Can your equipment meet the need? 3, Material. The material you use should meet the quality requirements. For example, the sealing ring of PARK and domestic goods is different. Material is also very important. 4. Method refers to the process method. Do your processing and assembly processes meet the requirements? 5, Environment. The environment shall be neat and orderly, clean and hygienic. It is especially important for the hydraulic cylinder production enterprise environment. Can your assembly shop site be clean and dust-free? Quality inspection is also a focus of control. Products should do pressure test, leakage test. The test pressure should reach 1.25 times the design pressure. If you can't maintain pressure, what about quality? You may not be able to do the whole process of cylinder production, you can take the method of OEM. Taking advantage of the strengths of specialized manufacturers, you contract out what you need and then assemble it yourself. But the principle of quality control is the same.

Two cylinders have a reversing control, if the load of the two cylinders is not the same, how to ensure their synchronization?
The piston rod of the cylinder is required to extend synchronization: install A shunt collector valve or synchronous motor at port A of the direction control valve, and then connect the two outlets of the shunt collector valve to the rod-free cavity of the two cylinders respectively. It is required that the outlet of the diverter collector valve is connected to the rod cavity of the two cylinders respectively when the piston rod is withdrawn in synchronization. The synchronization performance depends on the quality of the diverter valve and the leakage of the hydraulic system.