This article mainly introduces:

Estonia hydraulic cylinder,hydraulic telescopic cylinder manufacturer,hydraulic telescopic cylinder

(Estonia hydraulic telescopic cylinder,produced by Hengyu Hydraulic Co., Ltd）

hydraulic telescopic cylinder are widely used in Estonia，because of long service life，smooth movement，high work efficiency.So our company has designed hydraulic telescopic cylinder for customers from Estonia.

Introduction to hydraulic telescopic cylinder:

hydraulic telescopic cylinder diameter, rod diameter, stroke determination: Choose national standards or other standards hydraulic telescopic cylinder, avoid the selection of non-standard size, otherwise the difficulty of processing and manufacturing costs will be increased. The length of the hydraulic telescopic cylinder guide is determined by the length of the stroke. Check the strength of hydraulic telescopic cylinder, piston rod, screw, etc. according to the working pressure or load. At the same time, working pressure, ambient temperature, working medium and running speed are also the key to selecting seals.

The difference between the plunger hydraulic telescopic cylinder and the piston hydraulic telescopic cylinder is that the piston in the hydraulic telescopic cylinder is replaced by a shaft plunger, which is used in hydraulic transmission requiring a long mechanical stroke, and can only input pressure oil from one direction, pressurize in a single direction, and form a thrust to push the plunger to move. The return trip of the plunger depends on the plunger itself to fall, and some rely on the spring to push back to the original position. Usually used plunger type hydraulic telescopic cylinder, its inner hole does not need mechanical finishing, as long as the plunger round grinding can be assembled.

hydraulic telescopic cylinder buffer valve inspection and maintenance: For the valve buffer hydraulic telescopic cylinder, the focus should be on checking the wear of the buffer valve spool and seat. Once it is found that the amount of wear increases and the seal fails, it should be replaced. It can also be repaired by using abrasive spool and seat matching grinding method.

How to repair the hydraulic telescopic cylinder body when it is damaged: When the hydraulic telescopic cylinder has trace deformation and shallow tensile marks, the hydraulic telescopic cylinder is repaired by strong honing process. The heavy honing process can repair hydraulic telescopic cylinders up to 2.5 times out of tolerance than the original tolerance. It honed the parts with excessive size or shape error through a powerful honing machine, so that the overall size, shape tolerance and roughness of the hydraulic telescopic cylinder can meet the technical requirements.

Answers to some questions about hydraulic telescopic cylinder:

What is the reason for the hydraulic cylinder sticking out and not retracting?
There are two reasons: First, the problem with the seal, if there are two seals on the piston, the top seal is broken. Second, when the hydraulic pressure itself is designed, the rod cavity area is too small, so that the desired return force can not be achieved during the return trip. You can first check whether the coupling is damaged; Then see if the relief valve in the oil line block is blocked. If the use time is too long, it needs to be cleaned, the hydraulic oil is very dirty and can block oil block. Electromagnetic directional valves can also be checked, but the chance of problems is relatively small, unless there is a product problem.

How to choose cylinder size, pump type, motor power for a 30-ton press?
30 tons = 30,000 kg. It is expected to use a 16 mpa oil pump, then the cylinder area =30000/(160x3.14) and then square, the cylinder bore is 150 mm. Calculated at 500 mm travel per minute, the flow rate per minute is :0.75^2x3.14x5=8.8 liters/minute. Motor power =8.8x16/60=2.355. A 9 L/min, 16 mpa pump is available. Piston diameter 150 mm cylinder. 3 kW motor.