Causes and solutions for vibration of hydraulic universal test machine fuel tank

The hydraulic universal testing machine seals the joint through the side surface of the polyethylene blow molding barrel, and uses the water pump to fill the barrel with water of 20±2°C to remove the air. After reaching the specified water pressure, the constant pressure is 30 minutes. Then check it. In the process of application, we may encounter the problem that the fuel tank is always vibrating. What causes the fuel tank to vibrate? The Shanghai Jianjian engineers are here to tell you why:

1. The hydraulic oil pump (gear pump, plunger pump, vane pump, variable vane pump, quantitative vane pump, double vane pump, internal gear pump, external gear pump) is installed on the fuel tank. When designing a large hydraulic system, consider the hydraulic pump and motor unit on the outer base of the tank and connect the hose to the tank. Because many people like to talk about the motor and hydraulic oil pump on the top of the fuel tank when designing the hydraulic system, if it is a small hydraulic pump station, there is no problem, but if it is a large hydraulic pump station, it will not work, it will cause the vibration of the fuel tank. .

2. The structure of the hydraulic station is poor, and the thickness of the steel plate of the fuel tank is too thin. The hydraulic system is designed with thicker steel plates, together with ribs on the side and low plates of the tank, together changing the shape or position of the end of the return pipe.

3. There is no means to prevent vibration on the fuel tank. This can be added to the base of the fuel tank and under the base of the hydraulic oil pump (gear pump, plunger pump, vane pump, variable vane pump, dosing vane pump, double vane pump, internal gear pump, external gear pump) to avoid vibration.

The remedy we can take is to increase the diameter of the return pipe, perhaps to change the large-capacity overflow valve, and reduce the speed of the return flow; to reduce the impact of the oil flow on the tank. In addition, the direction of the oil outlet of the oil return pipe can be appropriately changed to avoid the direct impact of the oil flow on the oil tank, and the vibration of the fuel tank of the hydraulic universal test machine can be reduced; however, the oil outlet of the oil return pipe of the overflow valve cannot be completely avoided. Opening the side wall of the tank; when the vibration and noise of the tank are not the main contradiction, the side wall of the tank should receive a certain impact of the oil flow to bear some of the kinetic energy of the oil flow. Severe agitation caused by the direct impact of high-speed oil flow on the oil in the hydraulic universal testing machine tank is avoided.

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