(land leveller hydraulic cylinder,produced by Hebei Hengyu company）

land leveller hydraulic cylinder are widely used ，because of simple structure and reliable operation，excellent temperature resistance，no transmission clearance.So our company has designed land leveller hydraulic cylinder for our customers.

Introduction to land leveller hydraulic cylinder:

Before the land leveller hydraulic cylinder is removed, the relief valve should be loosened to reduce the pressure of the hydraulic circuit to zero, and then the power supply should be cut off to stop the hydraulic device. After loosening the oil port piping, the oil plug should be applied to plug the oil port.

When the land leveller hydraulic cylinder is customized, if there are high requirements for the quality of the land leveller hydraulic cylinder, it is best to use rolling processing, because the surface layer has surface residual compressive stress, which helps to close the surface of the small crack, preventing 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 land leveller hydraulic cylinder can be improved. By rolling forming, a cold working hardening layer is formed on the rolling surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the inner wall of the land leveller hydraulic cylinder and avoiding the burn caused by grinding. After rolling, the reduction of surface roughness value can improve the matching property.

land leveller hydraulic cylinder is the most important part of construction machinery, the traditional processing method is: broaching land leveller hydraulic cylinder block - fine boring land leveller hydraulic cylinder block - grinding land leveller hydraulic cylinder block. The rolling method is: broaching land leveller hydraulic cylinder block - fine boring land leveller hydraulic cylinder block - rolling land leveller hydraulic cylinder block, the process is 3 parts, but the time is compared: grinding 1 meter of the land leveller hydraulic cylinder block is about 1-2 days, rolling 1 meter of the land leveller hydraulic cylinder 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 RA3.2-6.3 μm before rolling to Ra0.4 ~ 0.8μm, the surface hardness of the hole increases by about 30%, and the fatigue strength of the inner surface of the land leveller hydraulic cylinder increases by 25%. If the land leveller hydraulic cylinder life is only considered, it is increased by 2 to 3 times, and the boring and rolling process is 3 times more efficient than the grinding process In particular, if you want to make high-quality land leveller hydraulic cylinders, you must take the rolling production process. After the land leveller hydraulic cylinder is rolled, there is no sharp tiny edge on the surface, and long-term motion friction will not damage the seal ring or seal, which is particularly important in the hydraulic industry.

The assembly work of the land leveller hydraulic cylinder has a great impact on the quality of the land leveller hydraulic cylinder: each part must be carefully cleaned before assembly; To correctly install the sealing device everywhere: when installing the sealing ring, pay attention to its installation direction to avoid oil leakage due to installation, and its lip should be equipped with a pressure oil chamber. In addition, because it is a YX-shaped sealing ring, it is necessary to pay attention to distinguish between shaft and hole use, do not install wrong; Because the sealing device is matched with the sliding surface, an appropriate amount of hydraulic oil should be applied during assembly; The special wrench should be used when the threaded coupling is tightened, and the torque should meet the standard requirements; After the piston and piston rod are assembled, it is necessary to measure whether the coaxiality and straightness on the full length are out of whack. After assembly, there should be no blocking sensation and uneven resistance when the piston assembly moves.

Answers to some questions about land leveller hydraulic cylinder:

What is the pressure provided for a 63-bore cylinder with a pressure of 2 mpa?
2 mpa pressure is equivalent to 20 kg per square centimeter, 6.3 cm straight longitude, 3.15 cm radius, square, multiplied by, calculated an area of about 31.5 square centimeters, multiplied by 20 kg, the pressure is about 630 kg.

Cylinder la-50-70st What does that mean?
Full model should be CX-LA-50-70ST, thin block cylinder, radial mounting, bore 50, stroke 70.