Hydraulic Cylinder Design Experience Sharing

 

First of all, before designing a hydraulic cylinder in hydraulic power transmission system, we must first consider the following aspects.

 

1. Before designing the hydraulic cylinder, minimize the size of the hydraulic cylinder to make the structure compact.

 

2. When designing, the reciprocating speed of the hydraulic cylinder and the traction required by the stroke should be guaranteed.

 

3. The piston rod is best to be pulled and not compressed to avoid bending deformation.

 

4. Ensure that each part has sufficient strength, rigidity and durability.

 

5. We should try to avoid lateral load on the hydraulic cylinder when designing the hydraulic cylinder.

 

6. When the piston rod of the long-stroke hydraulic cylinder is extended, try to avoid sagging.

 

7. In the design process, we should try to eliminate the deflection between the piston, piston rod and guide rail.

 

8. According to the working conditions and specific conditions of the hydraulic cylinder, consider buffering, exhaust and dust prevention measures.

 

9. The hydraulic cylinder in automatic transmission hydraulic system should not be flexed due to restrictions due to temperature changes. Especially long hydraulic cylinders should be paid more attention.

 

10. The hydraulic cylinder should be sealed as possible to prevent leakage.

 

11. The structural elements of hydraulic cylinders in hydraulic power transmission system should adopt standard series sizes, and try to choose frequently used standard parts.

 

12. When designing, try to achieve low cost, easy manufacturing and convenient maintenance.

 

 

Hydraulic Cylinder Design Steps

Finally, we can complete the design of the hydraulic cylinder step by step.

 

1. First, we need to select the type and structure of the hydraulic cylinder according to the action requirements of the host.

 

2. We need to grasp the original data and design basis, including the purpose and working conditions of the host, the structural characteristics of the working mechanism, load conditions, stroke size and action requirements, the selected working pressure and flow rate of the hydraulic mechanical transmission system, the actual situation of materials, accessories and processing technology and relevant national standards and technical specifications.

 

3. According to the external load force of the hydraulic cylinder, such as gravity, external mechanism movement friction force, inertial force and working load, the change law of the load of the hydraulic cylinder at each stage of the stroke and the power value that must be provided are determined.

 

4. Then we need to determine the diameter of the piston and piston rod according to the working load of the hydraulic cylinder in hydraulic transmission system and the selected working pressure of the oil.

 

5. We should determine the flow rate of the hydraulic pump according to the movement speed of the hydraulic cylinder, the diameter of the piston and the piston rod.

 

6. After that, we need to select the cylinder material and calculate the outer diameter.

 

7. We should select the structure of the cylinder head and calculate the connection strength between the cylinder head and the cylinder tube.

 

8. Next, we should determine the maximum working length of the hydraulic cylinder according to the working stroke requirements, usually it is longer than diameter of the piston rod. As the piston rod is slender, longitudinal bending strength check and hydraulic cylinder stability calculation should be carried out.

 

9. When necessary, we need to design buffer, exhaust and dustproof devices.

 

10. Then we should draw hydraulic cylinder assembly drawings and parts drawings.

 

11. Finally, we should organize design calculations, review drawings and other technical documents.

 

 

Through the above steps and precautions, we can design a hydraulic cylinder with good function and low price. In the hydrostatic drive systems, in addition to the hydraulic cylinder, other components are also very important, such as hydraulic hose fitting, hydraulic adapter, hydraulic quick release coupling, and hydraulic ball valve. Jazzy Industrial has professional manufacturing machines that can provide high-quality hydraulic components.