This article mainly introduces:

S.Africa hydraulic cylinder,stern plate hydraulic cylinder manufacturer,stern plate hydraulic cylinder

(S.Africa stern plate hydraulic cylinder,produced by Hengyu Hydraulic Cylinder Factory）

stern plate hydraulic cylinder are widely used in S.Africa，because of high work efficiency，excellent fatigue and impact resistance，no need for deceleration device.So our company has designed stern plate hydraulic cylinder for customers from S.Africa.

Introduction to stern plate hydraulic cylinder:

stern plate hydraulic 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 stern plate hydraulic 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 ' stern plate hydraulic 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 stern plate hydraulic cylinder and the hydraulic motor are devices that convert the pressure energy of the liquid into mechanical energy and output it. The stern plate hydraulic cylinder mainly outputs linear motion and force. The stern plate hydraulic 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 stern plate hydraulic cylinder, plunger stern plate hydraulic cylinder is mainly used for: machinery, such as excavators; Scientific research, such as university structure laboratory. The plunger stern plate hydraulic cylinder is used for pressure testing machines, such as Jinan test, and the test machine is used for material testing.

When the piston speed of the stern plate hydraulic cylinder is high, the steel ball of the check valve flows with the oil flow, so that the valve hole is blocked, and the stern plate hydraulic cylinder moves irregularly. Elimination method: Replace the steel ball with a cone valve or spool with a guide shoulder.

The stern plate hydraulic cylinder is mainly composed of body, piston, piston rod, stern plate hydraulic cylinder head, stern plate hydraulic cylinder bottom, piston rod head and related auxiliary devices. The piston divides the stern plate hydraulic cylinder into two chambers, and moves reciprocally in the stern plate hydraulic cylinder with the help of pressure oil. In order to improve its working effect, there is no sealing ring on the piston to eliminate internal leakage, where the piston rod passes through the stern plate hydraulic cylinder head, due to the existence of the gap, it is easy to produce external leakage phenomenon, and the dust can enter the stern plate hydraulic cylinder through the gap, so the sealing device and dust prevention reason are set. At the same time, in order to eliminate the influence of eccentric load on the work of the piston, all the stern plate hydraulic cylinders must be provided with a considerable length of guide sleeve at the extended end of the piston rod. In addition, in the case of faster piston movement, the phenomenon of mechanical collision between the piston and the stern plate hydraulic cylinder bottom and the stern plate hydraulic cylinder head is serious, so the buffer deceleration should be set at both ends of the stern plate hydraulic cylinder The working medium of the stern plate hydraulic cylinder: because it works at room temperature, the ordinary oil-type hydraulic oil can be selected; stern plate hydraulic cylinder sealing device: The use of Yx sealing ring, polyurethane (PU) and polytetrafluoroethylene (PTFE) materials combined to achieve a good sealing effect; Buffer mechanism of the stern plate hydraulic cylinder: The buffer structure of the stern plate hydraulic cylinder is to prevent the piston from colliding with the stern plate hydraulic cylinder head at the end of the stroke.

stern plate hydraulic cylinder is the most important part of construction machinery, the traditional processing method is: broaching stern plate hydraulic cylinder block - fine boring stern plate hydraulic cylinder block - grinding stern plate hydraulic cylinder block. The rolling method is: broaching stern plate hydraulic cylinder block - fine boring stern plate hydraulic cylinder block - rolling stern plate hydraulic cylinder block, the process is 3 parts, but the time is compared: grinding 1 meter of the stern plate hydraulic cylinder block is about 1-2 days, rolling 1 meter of the stern plate hydraulic 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 stern plate hydraulic cylinder increases by 25%. If the stern plate hydraulic 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 stern plate hydraulic cylinders, you must take the rolling production process. After the stern plate hydraulic 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.

Answers to some questions about stern plate hydraulic cylinder:

What are the main dimensions of the cylinder?
The main dimensions of the cylinder include: cylinder inner diameter, piston cylinder diameter, cylinder length, cylinder wall thickness, stroke, installation distance, etc.

Why does the tipping bucket cylinder have a cylinder withdrawal problem?
This problem may have a certain relationship with the operation of the driver, the main reasons are the following two situation analysis: 1, the current domestic loader working device is mostly a six-link mechanism, the six-link mechanism in the bucket to the limit position, lift the boom, the rotating bucket cylinder will appear "cylinder pulling" phenomenon, that is, the piston rod of the rotating bucket cylinder will be pulled out. In this case, in order to protect the cylinder, a pressure overload protection valve with large and small cavities is provided on the multi-way valve rotating bucket link (large chamber 18MPa, small chamber 12MPa). 2, before the cylinder is assembled to the whole machine, the cylinder is not limited, the piston rod of the cylinder can be pulled in place before and after, but when it is installed on the whole machine, in order to avoid the cylinder pulling out, the limit switch is installed according to the regulations.