During the operation of the hydraulic station system, high oil temperature is a common problem that needs to be taken seriously. It will have many adverse effects on the performance, stability and service life of the system.
1. Analysis of the reasons for high oil temperature
The reasons for high oil temperature in the hydraulic station are relatively complicated. First, the hydraulic pump is one of the main sources of heat. When it is working, it converts mechanical energy into hydraulic energy through mechanical friction. Part of the energy will be lost in the form of heat energy. If the pump is inefficient or in a high-load operation state for a long time, the heat generated will accumulate in large quantities. Secondly, when various control valves in the hydraulic system, such as the overflow valve, overflow, the pressure oil passes through the narrow channel between the valve core and the valve seat, and generates heat due to the throttling effect. Furthermore, the pressure loss along the pipeline system and the local pressure loss will also cause the oil temperature to rise. In addition, when the ambient temperature is too high and the heat dissipation conditions of the hydraulic station are poor, it is difficult to dissipate the heat effectively. For example, in the hot summer or when the hydraulic station is located in a small space with poor ventilation, the oil temperature can easily exceed the normal range. In addition, the viscosity of the hydraulic oil is not appropriate. If the viscosity is too high, the internal friction will increase, which will increase the oil temperature. When the hydraulic oil is polluted and deteriorated, and contains impurities or moisture, it will also affect its heat dissipation performance and accelerate the rise of oil temperature.
2. Hazards of excessive oil temperature
Excessive oil temperature will bring a series of hazards to the hydraulic station system. On the one hand, it will reduce the viscosity of the hydraulic oil, resulting in increased system leakage and increased pressure loss, thereby reducing the working efficiency of the system. For example, seals are prone to aging and deformation at high temperatures, causing leakage in the originally well-sealed parts, which not only wastes hydraulic oil, but also may affect the normal operation of the system. On the other hand, excessive oil temperature will accelerate the oxidation and deterioration of the hydraulic oil, shorten its service life, and the acidic substances produced will also corrode the metal parts in the system, such as pumps, valves, and pipelines, reduce their mechanical properties and reliability, increase the risk of equipment failure, and in severe cases may even cause the system to paralyze, causing production interruptions and economic losses.
3. Discussion on cooling measures
For the problem of excessive oil temperature, a variety of cooling measures can be taken. First, optimize the heat dissipation system of the hydraulic station, reasonably increase the surface area of the oil tank, and use materials with good heat dissipation performance to make the oil tank, such as aluminum alloy oil tanks. At the same time, install efficient coolers, such as air-cooled coolers or water-cooled coolers, select appropriate cooling methods and cooler specifications according to actual working conditions, and dissipate the heat in the hydraulic oil in time. Secondly, rationally design and optimize the hydraulic system, select high-efficiency hydraulic pumps and control valves to reduce energy loss. For example, use a variable pump to adjust the flow according to the actual needs of the system to avoid long-term overflow of the overflow valve. Furthermore, strengthen the management of hydraulic oil, regularly test its viscosity, acid value and other indicators, and replace contaminated or deteriorated hydraulic oil in time to ensure the quality and heat dissipation performance of the hydraulic oil. In addition, improving the working environment of the hydraulic station, strengthening ventilation and reducing the ambient temperature will also help control the oil temperature.
4. Key points for the implementation of cooling measures and monitoring and maintenance
When implementing cooling measures, some key points need to be paid attention to. For example, the installation position of the cooler should be reasonable to ensure that the cooling medium can fully take away the heat; the pipe connection of the cooling system should be firm and leak-free. At the same time, a sound oil temperature monitoring mechanism should be established, temperature sensors should be installed to monitor oil temperature changes in real time, oil temperature alarm values should be set, and timely measures should be taken when the oil temperature exceeds the normal range. Regular maintenance should be performed on the heat dissipation system and cooling equipment, dust and dirt on the surface of the cooler should be cleaned, and the operation of the fan, water pump and other components should be checked to ensure their normal operation. Only in this way can the oil temperature of the hydraulic station system be effectively controlled to ensure the stable operation and long-term reliability of the system.
