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Capture the moment, the application of enlarged detail HPM4030 in detecting hydraulic impact
When the hydraulic system suddenly starts, stops, drives, changes or reverses, the valve mouth suddenly closes or stops suddenly. Due to the inertia of liquid and moving parts, it makes the system instantaneous peak pressure, which is called hydraulic impact. The hydraulic impact may cause great damage to the hydraulic system, and the consequence is more serious in the system of high pressure, high speed and large flow. Therefore, we should try to avoid the formation of hydraulic impact during operation. Hydraulic shock in hydraulic system will cause the following hazards.
1. Many components in the hydraulic system, such as pipes and instruments, will be damaged by high hydraulic impact. In general, the peak pressure of hydraulic impact can be as high as 3~4 times as high as the normal working pressure. The heavy pipe will break the pipeline, damage the hydraulic components and measuring instruments, and the light can also make the precision of the instrument drop.
2, the reliability and stability of hydraulic system will also be impacted by hydraulic impact. For example, the pressure relay will cause an error signal due to hydraulic impact, which will interfere with the normal operation of the hydraulic system.
3, when the hydraulic system is subjected to the hydraulic impact, it can also cause the heating of the hydraulic system to produce vibration and noise, as well as the loose leaking of the connector, so that the pressure valve adjustment pressure (set value) is changed.
Hydraulic impact often occurs in a short time. We usually use pressure gauge to capture. At this point we need to use professional equipment to measure the hydraulic impact in the hydraulic system, and the webtec HPM4030 data collector just meets all of our requirements. HPM4030 can detect pressure, flow rate, speed and temperature. The scanning speed is up to 1ms, so we can capture millisecond pressure impact. Here we will illustrate with an example.
HPM4030 Tester
Figure 2 shows the working pressure curve of the piling equipment measured by HPM4030. From the curve, it can be seen that the pressure of the equipment during normal working is 135 bar, and the equipment has a pressure shock in 4s, up to 322 bar.
Piling equipment working pressure curve
Working pressure curve of vibration equipment
Figure 3 shows the working pressure curve of a vibrating device measured using the HPM4030. It can be seen from the curve that the pressure at the time of normal operation of the device is 100 bar, and the device has a pressure shock within 1 s and reaches 438 bar.
From the analysis of the above data curves, it can be seen that the pressure impact time is short and the pressure is high. If the pressure gauge is used to detect it is often not detected, this will leave the hydraulic system with safety hazards. If webtec test instrument testing is used, analysis of the test data allows us to easily detect the pressure surges that occur in the hydraulic system. Therefore, the HPM4030 tester is an essential test tool for hydraulic engineers.
For more information on digital hydraulic tester products and applications, please call 021-63065298 to 807 or 805.