This article mainly introduces:

Germany hydraulic cylinder,double rod cylinder manufacturer,double rod cylinder

(Germany double rod cylinder,produced by Hengyu Hydraulic Cylinder Factory）

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

Introduction to double rod cylinder:

The scar on the sliding surface of the double rod cylinder piston will transfer with use. Before the piston is installed, there are scars on its sliding surface, which are installed intact and untreated, and these scars will in turn scratch the inner surface of the double rod cylinder wall. Therefore, before installation, these scars must be fully repaired.

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

Disassembly double rod cylinder: When disassembly double rod cylinder, strictly prevent damage to the screw thread at the top of the piston rod, the screw thread of the double rod cylinder head and the surface of the piston rod. It should also be noted that the piston cannot be played out from the double rod cylinder.

What kind of process is used in the double rod cylinder to make high-quality double rod cylinder products: the body is the main component of the double rod cylinder, mining single pillar, hydraulic support, gun tube and other products, and its processing quality directly affects the life and reliability of the entire product. Body processing requirements are high, the internal surface roughness requirements are Ra0.4 ~ 0.8&um, the coaxiality, wear resistance requirements are strict. The basic feature of body is deep hole processing, which has always troubled the processing personnel. The double rod cylinder products of our company mainly use rolling processing, because the surface layer has surface residual compressive stress, which helps to close the surface micro-cracks and hinder the expansion of erosion. Thus, the corrosion resistance of the surface can be improved, and the fatigue crack can be delayed or expanded, and the fatigue strength of the body can be improved. The correct rolling process of the double rod cylinder block: broaching block - fine boring block - grinding block. The rolling method is: broaching block - fine boring block - rolling block, the process is 3 parts, but the time is compared: grinding 1 meter of the block is about 1-2 days, rolling 1 meter of the block is about 10-30 minutes. Input comparison: grinding machine or quilting machine (tens of thousands - millions), rolling knife (ten thousand - tens of thousands). After rolling, the surface roughness of the hole decreases from RA3.2-6.3um before rolling to RA0.4-0.8&um, the surface hardness of the hole increases by about 30%, and the fatigue strength of the inner surface of the double rod cylinder increases by 25%. If the service life of the double rod cylinder is only considered, it is increased by 2 to 3 times, and the efficiency of the boring and rolling process is about 3 times higher than that of the grinding process. double rod cylinder misoperation or operation failure may be caused by the following reasons, you can start from these aspects of the investigation: (1) spool stuck or valve hole blocked. When the spool of the flow valve or direction valve is stuck or the valve hole is blocked, the double rod cylinder is prone to misoperation or operation failure. At this time, the contamination of the oil should be checked; Check whether dirt or colloidal deposits are stuck in the spool or blocking the valve hole; Check the wear of the valve body, clean and replace the system filter, clean the fuel tank, and replace the hydraulic medium. (2) The piston rod and double rod cylinder are stuck or the double rod cylinder is blocked. At this time, no matter how to manipulate, the double rod cylinder does not move or moves very little. At this time, check whether the piston and piston rod seal is too tight, whether it enters the dirt and gum deposits: whether the shaft line of the piston rod and the double rod cylinder is in the center, whether the wearing parts and seals are invalid, and whether the load is too large.

Answers to some questions about double rod cylinder:

How to design the guide sleeve of cylinder diameter 400?
The purpose of the guide sleeve is to guide and seal. Therefore, it is necessary to look at the speed of the piston rod, working pressure and radial force. High speed, medium pressure, no (or very little) radial force, with a Steseal. Low speed and heavy load, medium radial force, combined seal. High speed and heavy load, large radial force, sealed with DU sleeve + copper ring + combination. The combination seal must have a lubricating oil passage, and a seal must be added to the outside of the oil passage.

How to calculate the tonnage of the hydraulic press? Example: The input cylinder pressure is 5Mpa, the end area of the cylinder piston is 100mm, and how much is the thrust tonnage?
F=P*S=5*10^6*3.14*(1/20)^2=39250N.