This article mainly introduces:

Holland hydraulic cylinder,reciprocating cylinder manufacturer,reciprocating cylinder

(Holland reciprocating cylinder,produced by Hebei Hengyu company）

reciprocating cylinder are widely used in Holland，because of powerful torque，clever hydraulic energy conversion，no transmission clearance.So our company has designed reciprocating cylinder for customers from Holland.

Introduction to reciprocating cylinder:

reciprocating cylinder piston rod material selection and requirements: ① piston rod is usually made of 45 steel. When there is a large impact force and heavy load transmission, it is made of 40Cr steel. This is to ensure that the piston rod has sufficient working strength. The piston rod is generally designed as a reciprocating cylinder, if the diameter is larger, the hollow piston rod can be used. Made of No. 45 seamless steel pipe. ③ When the piston rod is manufactured, the blank should be first forged and conditioned after mechanical rough processing, and the hardness of HB=230 ~ 250. The purpose of conditioning is to improve the machining performance and increase the working strength of the material. ④ The surface roughness Ra of the piston rod after finishing should not be greater than 0.65μm. ⑤ In order to improve the corrosion resistance of the piston rod, the working surface of the rod can be plated with hard chromium. ⑥ The piston rod and the end cap are guided by H8 ' reciprocating cylinder piston rod industry standard: piston rod diameter series of national recommended standard GB/T2348-1993. Piston rod thread size series standard GB/T2350-1980. Please refer to execute. There is no industry standard for piston rods Both the reciprocating cylinder and the hydraulic motor are devices that convert the pressure energy of the liquid into mechanical energy and output it. The reciprocating cylinder mainly outputs linear motion and force. The reciprocating cylinder has a variety of forms, according to the different characteristics of its mechanism it can be divided into piston type, plunger type and swing type three categories, according to the mode of action he can be divided into single action and double action. Piston reciprocating cylinder, plunger reciprocating cylinder is mainly used for: machinery, such as excavators; Scientific research, such as university structure laboratory. The plunger reciprocating cylinder is used for pressure testing machines, such as Jinan test, and the test machine is used for material testing.

When producing oil reciprocating cylinders, there are two processing processes, grinding and rolling, the latter is better than the former. Rolling machining is a kind of non-cutting machining, using the plastic deformation of the metal at room temperature, so that the micro roughness of the workpiece surface is flattened to achieve the purpose of changing the surface structure, mechanical characteristics, shape and size. Therefore, this method can achieve the two purposes of finishing and strengthening at the same time, which can not be done by grinding.

When the reciprocating cylinder needs to be stored for a period of time, please follow the recommended methods: The reciprocating cylinder should be stored in a dry, clean, non-corrosive gas indoor environment, pay attention to protect the reciprocating 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 reciprocating cylinder should not be in direct contact with water vapor for a long time. The reciprocating cylinder should be placed as vertically as possible with the piston rod facing up, which minimizes corrosion due to possible condensation in the reciprocating 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 reciprocating cylinder Before working, the reciprocating cylinder must be run repeatedly with low pressure (greater than the starting pressure) to discharge the air in the reciprocating cylinder before normal work. The oil inlet and outlet and the joint must be tightly fastened with a combination pad to prevent oil leakage.

In the process of using the reciprocating cylinder, sometimes such a problem will occur, the reciprocating cylinder can not act immediately after the instruction of the reciprocating cylinder action is issued, and it must be moved after a short time, or sometimes it can move and stop moving, showing that the operation is very irregular. The cause and elimination of this failure mainly include air in the oil reciprocating cylinder. Elimination method: exhaust through the exhaust valve. Check the piston rod reciprocating parts of the sealing ring for air inhalation, if so, replace the sealing ring.

Answers to some questions about reciprocating cylinder:

How big is the motor and oil pump for the 80 cylinder?
Pump motor selection is not only related to cylinder diameter but also speed system, it is recommended to provide system diagram and speed requirements, generally speaking, most of the 80 cylinder on the market is equipped with 3-4KW motor, 10-20 oil pump.

To achieve the same stroke, which is better, hydraulic cylinder or lead screw?
If there is batch action, then the hydraulic pressure is better. Hydraulic: smooth operation, no lubrication, easy control, high control accuracy (can use proportional or servo system), the key is to manually control, but certainly to support the hydraulic system, for a single action must cost. Maintenance costs are also high. Lead screw: simple structure, easy to achieve, convenient maintenance, but must be lubricated, can not be manual, or manual control is inconvenient. See where it is used, if it is used in high-precision occasions, it must only be hydraulic, because the lead screw has a gap. There are many hydraulic actions, the hydraulic system itself must be prepared, then the use of hydraulic pressure is also very economical.