If it cannot be solved quickly and correctly, excessive noise or instability of the hydraulic pump will cause failure or accelerated wear. While hearing strange sounds from the pump is never a good thing, the different forms of noise associated with different malfunctions can provide valuable clues that can help you diagnose the problem and solve it before it becomes serious. This articleZhongyou Heavy IndustryWhat are the causes of the noise failure of the hydraulic pump.
Therefore, it is necessary to understand what different pump noises mean. Through practice, you can quickly distinguish between normal operating sounds and signs of failure. In this article, we will discuss the causes of these sounds so that you can identify them.
1) Pump noise caused by cavitation:
Cavitation is a common pump problem characterized by a harsh rasping sound or, in extreme cases, a violent clicking sound. This sound is caused by the following: a drop in fluid pressure causes a cavity to form in the fluid, and then quickly burst (hundreds or thousands of times per minute). As you might expect, this creates a lot of noise. This is a very destructive condition that can cause metal corrosion and damage the inner surface of the pump. Causes of cavitation include clogged fluid lines, clogged fluid filters, high oil viscosity, and high pump speed.
2) Pump noise caused by inflation:
Inflation is different from cavitation. Cavitation is the formation of voids in the fluid, while venting is the introduction of air bubbles into the fluid, which is usually caused by negative pressure conditions such as leaking couplings or sucking air under hydraulic seals. The whining sound caused by air leakage is similar to cavitation, but it is inherently more unstable due to the uneven distribution of air in the hydraulic system. In addition to noise problems, adding gas oil can also cause other problems, such as poor performance, reduced lubrication and increased wear, damage to seals, and increased pollution. Therefore, it is important not to ignore the problem of oil inflation.
3) Pump noise caused by mechanical failure:
Metal noise is usually a sign of some kind of mechanical problem. This may include harsh sounds, whistling or growling sounds, rattling or general noisy operations. Particularly in the case of accompanying excessive vibration, the temperature increases or the efficiency decreases. Mechanical pump problems may be caused by misalignment of the coupling, which puts pressure on the shaft and bearings. Any sanding, scratching, rough running indicates severe internal wear. In this case, the pump must be disassembled, inspected and overhauled by a trained technician. Worn components must be replaced, and in some cases, machining must be performed to restore the surface of the pump.
4) Pump noise caused by incorrect setting of safety valve:
The hiss is usually associated with your hydraulic pump relief valve. Its job is to open when the pressure reaches a certain specified limit, but its design cannot keep open and continuously relieve pressure. Therefore, this kind of voice is definitely abnormal and needs to be solved.
A continuous hiss indicates that the relief valve is set too low or stuck in the open position and continues to release pressure. Unsteady howling means that the safety valve is not set correctly or is damaged. Pump settings are often changed carelessly or inadvertently-sometimes to overcome other problems with the hydraulic system-sometimes due to a lack of understanding of the correct operating conditions, so these should be included in routine inspections. In addition to noise problems, safety valve damage can be accompanied by actuator slamming, stalling, and overheating.
5) Avoid accidental pump maintenance.
The noise problem is only one symptom that provides an indication when the hydraulic pump fails. There are other issues to know and understand that can help you determine the problem with the pump more quickly. This means you can get them out faster-potentially saving a lot of money in the future. These problems include heat problems, pressure problems and flow problems.
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Zhongyou Heavy Industry takes fluid pressure forming technology as its core, and its leading products include: internal high pressure forming equipment, plate filling forming equipment, pipe parts hydroforming equipment, water expansion hydroforming equipment, multi-station connected hydraulic deep drawing equipment, four-column hydraulic press equipment, frame hydraulic press equipment, etc. It can design and manufacture special non-standard hydraulic equipment, non-standard oil cylinders, non-standard hydraulic systems and automatic transmission systems according to customer requirements.
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