Hydraulic universal testing machines use the side surface of the polyethylene blow molding barrel to seal the joint, and then fill the barrel with water at 20±2°C using a water pump to remove air. Once the required water pressure is reached, it is maintained for 30 minutes before inspection. During operation, users may encounter issues such as constant vibration in the fuel tank. So, what causes this vibration? Let’s explore the reasons behind it, as explained by engineers from Shanghai Jianjian:
1. The hydraulic oil pump—whether it's a gear pump, plunger pump, vane pump, or other types—is often mounted on the fuel tank. In large hydraulic systems, it's common to place the pump and motor unit on the outer base of the tank, connected via hoses. However, some designers prefer to install the motor and pump on top of the fuel tank. While this works for small pump stations, it can cause serious vibration issues in larger systems, leading to instability in the fuel tank.
2. Poor structural design of the hydraulic station, such as thin steel plates on the fuel tank, can also lead to vibration. To prevent this, the tank should be constructed with thicker steel plates, reinforced with ribs on the sides and bottom. Additionally, modifying the shape or position of the return pipe's end can help reduce vibrations caused by fluid flow.
3. Lack of vibration-damping measures on the fuel tank is another common issue. Installing rubber mounts or anti-vibration pads under the tank and beneath the hydraulic pump can significantly reduce vibration. These simple additions can make a big difference in system stability and noise levels.
To address these issues, several solutions can be implemented. Increasing the diameter of the return pipe, replacing the overflow valve with a larger one, or reducing the speed of the returning oil flow can all help minimize turbulence inside the tank. Adjusting the direction of the return oil outlet can also prevent direct impact on the tank walls, further reducing vibration. However, it's important to note that some degree of oil flow impact on the tank is unavoidable, especially when the overflow valve is open. If vibration and noise are not the main concern, the tank's side wall should be designed to absorb some of the kinetic energy from the oil flow, preventing excessive agitation caused by high-speed impacts. By making these adjustments, you can significantly improve the performance and longevity of your hydraulic universal testing machine.
China Xuchang Wig Co., Ltd , https://www.hairxuchang.com