This article mainly introduces:

Denmark hydraulic cylinder,spring return cylinder manufacturer,spring return cylinder

(Denmark spring return cylinder,produced by Hengyu Group）

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

Introduction to spring return cylinder:

Factors that should be considered when selecting the oil seal in the spring return cylinder: some specific factors should be taken into account when selecting the oil seal in the spring return cylinder, so as to have correct consideration and get accurate results, and then avoid wrong selection. The factors and aspects that should be taken into account are eight: spring return cylinder diameter, piston rod diameter, piston rod and piston groove size, spring return cylinder working pressure, spring return cylinder movement speed, hydraulic system oil temperature and spring return cylinder working environment.

spring return cylinder is the most important part of construction machinery, the traditional processing method is: broaching spring return cylinder block - fine boring spring return cylinder block - grinding spring return cylinder block. The rolling method is: broaching spring return cylinder block - fine boring spring return cylinder block - rolling spring return cylinder block, the process is 3 parts, but the time is compared: grinding 1 meter of the spring return cylinder block is about 1-2 days, rolling 1 meter of the spring return 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 spring return cylinder increases by 25%. If the spring return 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 spring return cylinders, you must take the rolling production process. After the spring return 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 spring return cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and does linear reciprocating motion (or swinging motion). It is simple in structure and reliable in operation. When it is used to achieve reciprocating movement, the deceleration device can be eliminated, and there is no transmission gap, and the movement is smooth, so it is widely used in various mechanical hydraulic systems. The output force of the spring return cylinder is proportional to the effective area of the piston and the pressure difference between the two sides; The spring return cylinder is basically composed of spring return cylinder and spring return cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. Buffer device and exhaust device depending on the specific application, other devices are essential.

The definition of the minimum stable speed refers to the minimum movement speed of the spring return cylinder without crawling phenomenon when the full load is moving, it has no uniform indicator, and the spring return cylinder that undertakes different work has different requirements for the minimum stable speed.

Answers to some questions about spring return cylinder:

Need a hydraulic cylinder, vertical upward 10 seconds to lift 20 tons of weight up 2 meters, how large cylinder and rod, how much pressure to use the plunger pump and how big?
The first thing to determine the system pressure, let's say 25 mpa, can take into account cost and performance. 1 Cylinder area 20000/250=80 square cm cylinder diameter (80/3.14) squared x2=200 mm 2 cylinder volume 80x200=16000 ml =16 L 3 Required pump flow 16x60/10=96 L/min 4 Power 96x25/55=43 kW 45 kW motor is available.

What material is the piston rod of the cylinder made of?
About the piston rod: ① Piston rods are 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. ② The piston rod is generally designed as a cylinder, if the diameter is larger, the hollow piston rod can be used with 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 rod surface needs to be chrome plated.