This article mainly introduces:

New Zealand hydraulic cylinder,hydraulic lift cylinder manufacturer,hydraulic lift cylinder

(New Zealand hydraulic lift cylinder,produced by Hengyu Hydraulic Co., Ltd）

hydraulic lift cylinder are widely used in New Zealand，because of no need for deceleration device，long service life，smooth movement.So our company has designed hydraulic lift cylinder for customers from New Zealand.

Introduction to hydraulic lift cylinder:

What kind of process is used in the hydraulic lift cylinder to make high-quality hydraulic lift cylinder products: the body is the main component of the hydraulic lift 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 hydraulic lift 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 hydraulic lift 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 hydraulic lift cylinder increases by 25%. If the service life of the hydraulic lift 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. hydraulic lift 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 hydraulic lift 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 hydraulic lift cylinder are stuck or the hydraulic lift cylinder is blocked. At this time, no matter how to manipulate, the hydraulic lift 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 hydraulic lift cylinder is in the center, whether the wearing parts and seals are invalid, and whether the load is too large.

In order to ensure the service life of the hydraulic lift cylinder, the medium used must not be mixed with impurities and stolen goods, so as to avoid scratching the inner arm of the hydraulic lift cylinder, causing damage to the seal and causing leakage in the hydraulic lift 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.

Do not regularly check the damage of the chrome layer of the hydraulic lift cylinder: completely extend the hydraulic lift cylinder and carefully check whether there is any surface damage such as injury, strain, welding slag, such as the surface damage position, in the hydraulic lift cylinder block < 20cm, and the damage depth < 5mm, should be repaired in time to prevent long-term damage to the hydraulic lift cylinder seal. Welding slag is strictly prohibited on the surface of the hydraulic lift cylinder.

The daily inspection of the hydraulic lift cylinder includes: checking the connection of the hydraulic lift cylinder and the pipe joint for leaks. Check the hydraulic lift cylinder rod for leaks. Check the hydraulic lift cylinder connection for leaks. When the hydraulic lift cylinder moves, the work is normal and smooth. Whether the hydraulic lift cylinder has internal leakage.

Answers to some questions about hydraulic lift cylinder:

How to calculate the tonnage of the hydraulic press without konowing the diameter of the cylinder?
To know the tonnage of the hydraulic cylinder, you first need to know the working pressure of the hydraulic system, the inner diameter of the hydraulic cylinder and the outer diameter of the cylinder rod (the outer diameter of the cylinder rod is needed when calculating the hydraulic cylinder tension). The thrust of the hydraulic cylinder (that is, the force that the hydraulic cylinder can produce by extending out) = the cross-sectional area of the hydraulic cylinder (or the cross-sectional area of the piston) × the working pressure of the cylinder (the cross-sectional area of the piston) =pi*D^2/4= PI (take 3.14) × the square of the cross-sectional area of the piston ÷4 working pressure to see the pressure displayed on the pressure gauge when the maximum load is working.

How to disassemble injection molding machine injection cylinder?
If it is not repaired for a long time, it is recommended to open both ends, comprehensively check the oil seal and piston ring inside, this is not much difficulty, pay attention to not install reverse when changing the oil seal, some piston rings are steel rings are rubber rings, and several interfaces of steel rings are not in the same position; Rubber ring pay attention not to install reverse; Be careful not to damage the oil seal when installing, otherwise it will soon leak oil.