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Noise description of common faults in high and low temperature integrated equipment

High-low temperature integrated machine equipment may cause malfunction due to improper operation, then how to deal with noise failure of the equipment, and then analyze the noise too high.

The suction of high and low temperature integrated equipment is one of the main reasons for the excessive noise of the hydraulic pump. When air is mixed into the oil, it is easy to form cavitation in its high pressure zone and propagate in the form of pressure waves, causing oil to oscillate, causing cavitation noise. The main reasons are: the oil filter of the hydraulic pump, the blockage of the oil inlet pipe or the high viscosity of the oil can cause the vacuum at the pump inlet to be too high, so that the air penetrates. The oil seal of the hydraulic pump and the pilot pump shaft is damaged, or the inlet pipe is poorly sealed, causing air to enter. The oil level of the fuel tank is too low, so that the hydraulic pump inlet pipe is directly sucked.

When there is high noise in the operation of the hydraulic pump, the above parts should be inspected and the problems should be dealt with in a timely manner. The internal components of the high and low temperature integrated machine are excessively worn, such as the wear and strain of the piston pump cylinder and the distribution plate, the plunger and the plunger hole, etc., causing serious leakage in the hydraulic pump. When the hydraulic pump outputs high pressure and small Flow pulsation occurs when the fluid is flowing, causing higher noise. At this time, the deflection angle of the pilot system variable mechanism can be appropriately increased to improve the influence of internal leakage on the pump output flow. The servo valve spool of the hydraulic pump and the piston that controls the flow will also cause the piston to pulsate during the movement due to local wear and strain, causing fluctuations in the output flow and pressure of the hydraulic pump, resulting in large vibration and noise at the pump outlet. . At this point, the components that are severely worn or strained can be brushed and replaced or replaced.

The hydraulic pump distribution plate is also one of the important components that cause noise. In the use of high and low temperature integrated machine equipment, due to surface wear or sludge deposition on the opening of the unloading tank, the unloading tank will be shortened and the unloading position will be changed, which will cause oil trapping, which will lead to higher noise. In the normal repair process, the flat-repaired distribution plate will also have the effect of shortening the unloading groove. If it is not properly lengthened at this time, it will generate more noise. During the assembly process, the large unloading groove of the distribution plate must be installed in the high pressure chamber of the pump, and its sharp angle direction must be opposite to the direction of rotation of the cylinder block, otherwise it will bring greater noise to the system.

If the equipment has a noise failure, it needs to be solved in time. Once there is noise, it is definitely a malfunction.
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