How can mechanical noise from Rexroth piston pumps be effectively controlled?

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Since the main types of noise generated by Rexroth piston pumps are mechanical noise and fluid noise, from the perspectives of selection, operation, and maintenance, the key approaches to controlling the mechanical noise of Rexroth piston pumps can be summarized as follows: 1. Give priority to choosing Rexroth piston pumps with low noise levels, as well as their drive motors. 　　2. Seek to improve the machining and installation precision of the components related to Rexroth piston pumps, in order to reduce mechanical vibration and noise. 　　3. When the Rexroth piston pump unit is placed on the top cover of the fuel tank, shock isolation measures should be taken under the base of the pump unit, such as installing rubber shock pads, in order to block the path for mechanical noise and prevent vibration of the fuel tank. 　　4. If the installation space permits, it is advisable to consider using a non-top-mounted hydraulic pump station, with the pump unit separated from the fuel tank in order to prevent the vibrations of the pump unit from affecting the fuel tank. 　　5. The inlet and outlet ports of the Rexroth piston pump are connected by hoses to isolate the mechanical vibrations of the pump. 　　6. Increase the structural stiffness of the hydraulic pump’s fuel tank, for example by adding reinforcement ribs, to prevent it from being easily excited; while ensuring proper heat dissipation, strive to reduce the area of the fuel tank in order to minimize the radiative noise it generates. 　　7. Reasonably design and install pipelines. 　　While meeting the operational requirements, the external excitation frequencies and resonance points can be avoided by adjusting the length of the pipes. A certain number of pipe clamps should be used to increase the stiffness of the pipe connections and prevent vibration. If necessary, viscoelastic damping materials can be wrapped around the pipes; the internal friction of these materials helps to absorb the vibration energy of the pipes, reducing their amplitude and thereby decreasing the intensity of the vibrations they emit. 　　The above are the methods for controlling mechanical noise in Rexroth piston pumps. Once mechanical noise is under control, the next step is to address fluid noise; the sources of noise lie in these two areas, and solving the problems should start from these sources.