Hydraulic universal testing machine passes through the sealing connector on the bottom of the barrel cover of the high-pressure polyethylene injection barrel, fills the barrel with water of 20 +2 C by centrifugal pump, clears the gas, after exceeding the required pressure, the pressure is constant for 30 minutes, and then checks it。 In the whole process of application, we will encounter the problem that the automobile fuel tank always vibrates。 What causes the vibration of the automobile fuel tank?
1。 Hydraulic pumps (gear oil pumps, gear pumps, vane pumps, variable vane pumps, quantitative analysis vane pumps, double vane pumps, internal gear oil pumps, external gear oil pumps) are equipped on the automobile fuel tank。 When designing large-scale hydraulic system, we can think of putting the hydraulic pump and motor on the outer base of the tank, and connecting the tank with the hose。 Because many people like to talk about the motor and hydraulic pump equipment on the top of the automobile tank when they design the hydraulic system。 If it is a small and medium-sized hydraulic pump station, there is no problem, but if it is a large hydraulic pump station, it will not work, which will cause the vibration of the tank。
2. The structure of hydraulic system is not good, and the stainless steel thickness of automobile fuel tank is too thin. When designing the hydraulic system, we should add stiffened plates to the baffle and low plate of the automobile fuel tank, and change the shape or position of the end of the oil pipeline at the same time.
3. There is no anti-vibration method on the top of the fuel tank. This method can be used to lift the foot sole of the automobile fuel tank and the base of the hydraulic pump (gear oil pump, gear pump, vane pump, variable vane pump, quantitative analysis vane pump, double vane pump, internal gear oil pump, external gear oil pump) to prevent vibration.
In order to reduce the impact of oil pollution flow on automobile fuel tank, the rescue methods that people can adopt are enlarging the diameter of oil return pipeline, perhaps changing the speed control valve in large space, and reducing the speed of hydraulic oil return flow. In addition, the direction of the oil outlet of the return pipe can be changed properly to avoid the direct impact of oil flow on the oil tank, and the effect of reducing the vibration of the oil tank of the hydraulic universal testing machine can also be achieved; however, the oil outlet of the return pipe of the relief valve can not completely avoid the side wall of the oil tank; when the vibration and noise of the oil tank are not the main contradiction, the external wall of the oil tank should accept the inevitable impact of the oil pollution flow to bear the cost. Efficiency of some mechanical energy in oil pollution flow. It prevents the strong stirring caused by the instantaneous impact of the speed oil pollution flow on the hydraulic oil in the automobile oil tank of the hydraulic press tension testing machine.