This article mainly introduces:

New Zealand hydraulic cylinder,press machine hydraulic cylinder manufacturer,press machine hydraulic cylinder

(New Zealand press machine hydraulic cylinder,produced by Hebei Hengyu company）

press machine hydraulic cylinder are widely used in New Zealand，because of excellent temperature resistance，no transmission clearance，powerful torque.So our company has designed press machine hydraulic cylinder for customers from New Zealand.

Introduction to press machine hydraulic cylinder:

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

When the press machine hydraulic cylinder needs to be stored for a period of time, please follow the recommended methods: The press machine hydraulic cylinder should be stored in a dry, clean, non-corrosive gas indoor environment, pay attention to protect the press machine hydraulic cylinder from internal corrosion and external damage. If the indoor requirements cannot be met, the hardened and well-drained ground should be cushioned at least 30cm, and the upper part should be covered with waterproof storage. The oil press machine hydraulic cylinder should not be in direct contact with water vapor for a long time. The press machine hydraulic cylinder should be placed as vertically as possible with the piston rod facing up, which minimizes corrosion due to possible condensation in the press machine hydraulic cylinder and permanent deformation of the seal due to the piston and rod weight. (When the shield is stored in the shield machine, the support shoe is placed upward). Keep the oil port protective cover until the pipe is connected. For long-term storage, the protection should be added on both sides of the piston of the press machine hydraulic cylinder Before working, the press machine hydraulic cylinder must be run repeatedly with low pressure (greater than the starting pressure) to discharge the air in the press machine hydraulic cylinder before normal work. The oil inlet and outlet and the joint must be tightly fastened with a combination pad to prevent oil leakage.

The quality of the press machine hydraulic cylinder can not be ignored in the purchase of the press machine hydraulic cylinder. The press machine hydraulic cylinder is the main component of the press machine hydraulic cylinder, the single pillar for mining, the hydraulic support, the gun tube and other products, and its processing quality directly affects the life and reliability of the entire product. press machine hydraulic cylinder processing requirements are high, its internal surface roughness requirements are Ra0.4 ~ 0.8μm, the coaxiality, wear resistance requirements are strict. The basic feature of press machine hydraulic cylinder is deep hole processing, which has always troubled the processing personnel.

If the press machine hydraulic cylinder is sliding or crawling (stop and go), check whether there is any astringency inside the press machine hydraulic cylinder. The internal parts of the press machine hydraulic cylinder are improperly assembled, the parts are deformed, worn or the shape and position tolerance is excessive, and the action resistance is too large, so that the piston speed of the press machine hydraulic cylinder changes with the different stroke position, and there is slip or crawl. Most of the reasons are due to poor assembly quality of parts, surface scars or sintered iron filings, so that the resistance increases, the speed decreases. For example, the piston is different from the piston rod or the piston rod is bent, the press machine hydraulic cylinder or the piston rod is offset from the mounting position of the guide rail, and the sealing ring is too tight or too loose. The solution is to repair or adjust, replace damaged parts and remove iron filings. At the same time, check whether the lubrication is good or whether the press machine hydraulic cylinder bore processing is out of whack. Because the piston and press machine hydraulic cylinder, guide rail and piston rod are relative If the press machine hydraulic cylinder is crawling seriously, check whether air has entered the hydraulic system. Air compression or expansion can cause the piston to slip or crawl. The exclusion measures are to check the hydraulic pump, set up a special exhaust device, and quickly operate the exhaust several times in the full stroke. Check the seals at the same time, because the quality of the seals is directly related to slippage or crawling. When the O-ring is used under low pressure, compared with the U-ring, it is easy to slip or crawl because of the higher surface pressure and the larger difference between static and static friction resistance. The surface pressure of the U-shaped sealing ring increases with the increase of pressure, although the sealing effect is correspondingly improved, but the difference between static and static friction resistance is also larger, the internal pressure increases, affecting the rubber elasticity, due to the increase in the contact resistance of the lip, the sealing ring will tip over and the lip elongation, and it is also easy to cause slip or crawling press machine hydraulic cylinder weight composition and calculation. The weight of the press machine hydraulic cylinder is composed of the press machine hydraulic cylinder diameter, the outer diameter and weight of the press machine hydraulic cylinder, the rod diameter, and the weight of the accessories, so in calculation, it is to add all these together to get the specific value. However, if there are special circumstances, it may be calculated separately. This work can be carried out by yourself, but it can also be carried out by professionals, so that mistakes can be avoided.

Answers to some questions about press machine hydraulic cylinder:

How to judge the failure of forklift hydraulic cylinder?
The common faults of the hydraulic cylinder of forklift truck are mainly crawling, insufficient thrust, working speed decline or even stop. Generally, crawling occurs at low speed. The main reason is that the air stored in the cylinder is not cleared. In addition, excessive or uneven mechanical friction can also cause crawling. Such as the piston and the piston rod different heart, the piston rod full length or local bending, the cylinder hole straightness is poor, the cylinder is drum shaped or has a large taper, the cylinder thin finish decline or produce hair, the cylinder installation accuracy is out of whack, the piston rod nuts at both ends of the screw too tight to make its concentricity is poor, the oil seal screw too tight friction is too large, will cause crawling.

What is the clearance between the cylinder and the piston?
The gap between the cylinder and the piston in the radius is generally 40 wires, that is, about 0.4mm, and the gap of the cylinder with different diameters will be slightly different. Generally, the inner diameter of the cylinder is larger than the outer diameter of the piston, so as to prevent the friction between the outer surface and the inner surface of the cylinder during the operation of the piston. In order to ensure that the cylinder has a rod cavity and a rodless cavity seal, a sealing device, that is, a sealing ring, is installed on the outer surface of the piston. The sealing ring form is not exactly the same, the O-type sealing ring is generally used under low pressure, and the lip sealing ring is used under high pressure. At the same time, the outer circle of the piston is also equipped with a dust ring and a wear ring. As long as the cylinder seal fails, all the internal seals should be replaced.