Some issues to note when testing the noise of hydraulic pumps

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We now know the methods for testing the noise of Rexroth hydraulic pumps, as well as the locations where such tests should be conducted. What follows is an outline of the precautions to be taken when testing the noise of Rexroth hydraulic pumps; during these tests, it is important to take steps to minimize any impact on the surrounding environment. It can be divided into the following aspects: 1. Influences such as power supply, air flow, and reflection: If the voltage of the instrument’s power supply is unstable, a voltage stabilizer should be used to ensure that the test results are not affected by voltage fluctuations and become inaccurate. When using dry batteries, replace them if their voltage is too low, in order to avoid voltage variations. When conducting measurements outdoors, it is necessary to do so on days with no wind; when the wind speed exceeds level 4, a wind shield can be placed over the microphone or it can be covered with a layer of silk fabric. The microphone should be positioned at an appropriate distance between the noise source and reflective objects, and as far away from those reflections as possible. For example, it is best to keep a distance of over 1M from the walls and floor. When measuring noise, the microphone must maintain the same incident direction at all measurement points. 2. Background noise correction: Background noise correction is also known as background noise adjustment. It refers to the noise present in the surrounding environment when the noise source under measurement stops producing sound. The background noise should be at least 10 dB lower than the noise of the object being measured. If it is higher than this figure, a correction should be made. When conducting noise tests on Rexroth hydraulic pumps, it is necessary to pay attention to the points mentioned above in order to avoid interference with these tests, ensure the accuracy of the test results, and strive to achieve perfection in the performance of the Rexroth hydraulic pumps.