In some situations, when one end of the hydraulic system is a valve, and the other end is a large container, it is easy to produce pressure shocks.<\/strong> At this time, the instantaneous pressure peak is many times higher than the normal value, which will cause the vibration of the actuator, normal operation will be affected, and noise will be generated. Such actions often cause wrong actions in some components.<\/span><\/li>\n<\/ul>\n <\/p>\n
2. System Temperature Running Too High<\/h2>\n
Another common fault of mining machinery hydraulic systems is that the temperature is running too high.<\/strong> Generally speaking, it is normal for the temperature of the machine to increase after a period of time. However, if the high temperature is not controlled, the machine will be damaged, even causing mechanical spontaneous combustion, with serious consequences.<\/span><\/p>\nWhen the system is overheated, check whether there is oil leakage inside and whether the pump is worn. <\/strong>And if there is oil leakage, it should be replaced in time. Also, check whether the pressure setting value of the safety valve is faulty, and set the value in time. When the pump is installed too tightly, it can also overheat the system.<\/span><\/p>\n <\/p>\n
3. The System Pressure is Abnormal<\/h2>\n
Eis algumas raz\u00f5es comuns que podem causar uma press\u00e3o anormal no sistema.<\/strong><\/p>\n\n- The oil level in the fuel tank is too low, the system pressure is under normal operation, and the component does not move, or the component moves slowly when the actuator is working.<\/li>\n
- The opening of the relief valve is damaged, and the setting value of the pressure-reducing valve is low, resulting in insufficient system pressure. If the oil viscosity is too high or too low, the control pressure of the valve is not enough, and the orifice in the valve is blocked.<\/span><\/li>\n
- The oil temperature is too high, the joint or seal is leaking, the cylinder or motor is severely worn, or the main pump or motor is leaking too much.<\/span><\/li>\n
- A bomba est\u00e1 a rodar incorretamente, o amplificador est\u00e1 avariado ou o amplificador est\u00e1 sintonizado incorretamente.<\/span><\/li>\n
- Motor failure, overflow valve setting value is low, or the pump is blocked or damaged, and the valve fails.<\/span><\/li>\n<\/ul>\n
Maintenance Tips<\/strong><\/p>\n\n- Calibrate pressure sensors quarterly<\/li>\n
- Replace pressure filters every 500 hours<\/li>\n
- Monitor the accumulator precharge monthly<\/li>\n<\/ul>\n
While pressure issues affect system performance, unstable operation presents more immediate operational challenges.<\/p>\n
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4. Unstable Operation of The Hydraulic System<\/h2>\n
When the hydraulic system is unstable, it will slow down or suddenly speed up.<\/strong> In order to prevent this situation from happening, the lubrication conditions should be improved to reduce friction and clean up the stolen goods in time. <\/span><\/p>\nCheck whether the oil level is too low and the seal is intact.<\/strong> When the pressure pulse or the system pressure is too low or too large, it is not enough to overcome the external resistance. Check whether the setting value of the overflow valve meets the requirements. If it does not meet the requirements, it should be adjusted in time.<\/span><\/p>\n <\/p>\n
5. The Hydraulic System can’t Supply Oil Normally<\/h2>\n
During the movement of the hydraulic cylinder, when it is braked or reaches the endpoint, the movement of the hydraulic cylinder has large inertia and momentum, which will cause a greater impact when it is suddenly braked or collides. The pressure increases, and then impacts, which increase the hydraulic impact of the system.<\/span><\/p>\nQuando a dire\u00e7\u00e3o \u00e9 alterada, o programa \u00e9 desligado ou ligado instantaneamente, o que faz com que a energia potencial seja convertida em energia cin\u00e9tica, e quando a energia cin\u00e9tica \u00e9 convertida em energia potencial, ocorre um impacto.<\/p>\n
Solu\u00e7\u00e3o<\/strong><\/p>\nVerifique se o n\u00edvel de \u00f3leo do dep\u00f3sito de combust\u00edvel est\u00e1 demasiado baixo e se existe uma fuga. Se for detectada uma fuga, coloque o \u00f3leo na posi\u00e7\u00e3o normal. Verificar se o tubo de aspira\u00e7\u00e3o e o filtro de \u00f3leo est\u00e3o bloqueados. Se a viscosidade do \u00f3leo for demasiado elevada, o dep\u00f3sito de \u00f3leo pode ser drenado e substitu\u00eddo por um \u00f3leo de viscosidade inferior. Se for utilizada uma bomba unidirecional no sistema hidr\u00e1ulico, pode haver um problema com a dire\u00e7\u00e3o da bomba. Nesta altura, \u00e9 poss\u00edvel corrigir a cablagem e depois mudar a dire\u00e7\u00e3o.<\/span><\/p>\n <\/p>\n
6. Leakage of The Hydraulic System<\/h2>\n
Leakage of the hydraulic systems is one of the common faults of hydraulic systems. The surface geometric accuracy of the valve should be checked in time, and whether the concentricity of the valve is sufficient. If the casting parts have pores or cracks, the parts should be replaced, such as due to aging, or if the seal is not tight, the seal should be replaced. Check whether the oil pipe joints are loose. If they are loose, they should be tightened in time, and attention should be paid to check whether they are broken.<\/span><\/p>\n <\/p>\n
7. Small System Traction<\/h2>\n
When the hydraulic system has a small traction failure, it is generally necessary to re-check the safety valve of the system and make timely adjustments to the incorrect places; check whether the fuel tank is leaking, repair it, and fill it up in time. In addition, the cooling water volume and water pressure need to be adjusted to reach the rated value.<\/span><\/p>\n <\/p>\n
8. The Working Structure is Unstable<\/h2>\n
A estrutura de funcionamento do sistema hidr\u00e1ulico \u00e9 um processo relativamente complicado. Por isso, quando est\u00e1 inst\u00e1vel, deve ser inspeccionada e reparada a tempo de evitar perdas desnecess\u00e1rias. As principais manifesta\u00e7\u00f5es quando a estrutura de funcionamento do sistema hidr\u00e1ulico \u00e9 inst\u00e1vel s\u00e3o a acelera\u00e7\u00e3o s\u00fabita ou o abrandamento gradual, o batimento anormal e outros fen\u00f3menos.<\/span><\/p>\n\n- The lubrication effect is not good, and the resistance is increased. When this situation occurs, the lubricant should be added in time to remove debris to ensure the normal operation of the work.<\/span><\/li>\n
- Durante o trabalho, a bomba de \u00f3leo suga o \u00f3leo e o ar entra no sistema de trabalho. \u00c9 necess\u00e1rio verificar o n\u00edvel de \u00f3leo e o aperto a tempo de garantir que o n\u00edvel de \u00f3leo atinge o n\u00edvel normal.<\/span><\/li>\n
- O sistema n\u00e3o tem press\u00e3o e n\u00e3o pode conter a resist\u00eancia.<\/span><\/li>\n<\/ul>\n
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