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
Voici quelques raisons courantes qui peuvent entra\u00eener une pression anormale dans le syst\u00e8me.<\/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
- La pompe tourne mal, l'amplificateur fonctionne mal ou l'amplificateur est mal r\u00e9gl\u00e9.<\/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>\nLorsque la direction est modifi\u00e9e, le programme est instantan\u00e9ment \u00e9teint ou allum\u00e9, ce qui entra\u00eene la conversion de l'\u00e9nergie potentielle en \u00e9nergie cin\u00e9tique, et lorsque l'\u00e9nergie cin\u00e9tique est convertie en \u00e9nergie potentielle, il se produit un impact.<\/p>\n
Solution<\/strong><\/p>\nV\u00e9rifier si le niveau d'huile du r\u00e9servoir de carburant est trop bas et s'il y a une fuite. Si une fuite est d\u00e9tect\u00e9e, ajoutez de l'huile jusqu'\u00e0 la position normale. V\u00e9rifier si le tuyau d'aspiration et le filtre \u00e0 huile ne sont pas obstru\u00e9s. Si la viscosit\u00e9 de l'huile est trop \u00e9lev\u00e9e, le r\u00e9servoir d'huile peut \u00eatre vidang\u00e9 et remplac\u00e9 par une huile de viscosit\u00e9 inf\u00e9rieure. Si une pompe \u00e0 sens unique est utilis\u00e9e dans le syst\u00e8me hydraulique, il peut y avoir un probl\u00e8me de direction de la pompe. \u00c0 ce moment-l\u00e0, vous pouvez corriger le c\u00e2blage et ensuite changer la direction.<\/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
La structure de fonctionnement du syst\u00e8me hydraulique est un processus relativement compliqu\u00e9. Par cons\u00e9quent, lorsqu'elle est instable, elle doit \u00eatre inspect\u00e9e et r\u00e9par\u00e9e \u00e0 temps afin d'\u00e9viter des pertes inutiles. Les principales manifestations de l'instabilit\u00e9 de la structure de fonctionnement du syst\u00e8me hydraulique sont une acc\u00e9l\u00e9ration soudaine ou un ralentissement progressif, des battements anormaux et d'autres ph\u00e9nom\u00e8nes.<\/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
- Pendant le travail, la pompe \u00e0 huile aspire l'huile et l'air p\u00e9n\u00e8tre dans le syst\u00e8me de travail. Il est n\u00e9cessaire de v\u00e9rifier le niveau d'huile et l'\u00e9tanch\u00e9it\u00e9 \u00e0 temps pour s'assurer que le niveau d'huile atteint le niveau standard.<\/span><\/li>\n
- Le syst\u00e8me n'a pas de pression et ne peut pas retenir la r\u00e9sistance.<\/span><\/li>\n<\/ul>\n
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