Heat generation in hydraulic systems can be attributed to several factors:
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Improper Lubrication: Insufficient or improper lubrication between moving parts, such as the column shaft and guide frame, can lead to increased friction and subsequent heat generation. Proper lubrication is crucial to maintain smooth operation and reduce heat buildup.
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Contaminated Hydraulic Oil: The presence of debris or impurities in the hydraulic oil can cause the pump to work harder, leading to increased heat. It is essential to filter the oil carefully before use to ensure it is free from contaminants.
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High Oil Temperature: Factors such as high suction gas temperature, debris in the suction pump, or insufficient cooling water can lead to elevated oil temperatures. These conditions require adjustments like cooling the inlet air, removing debris, or increasing the flow of cooling water to manage the temperature effectively.
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Inefficient Temperature Control: In systems where the temperature is controlled by a heater, issues like necrosis of the heat shield or aging of electric heating elements can prevent the system from reaching or maintaining the rated temperature, leading to inefficient operation and heat generation.
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Pressure and Flow Issues: Inadequate pump pressure or improper flow rates can disrupt the efficient operation of the hydraulic system, leading to increased heat. Factors affecting pressure include the design of the piping system (length, height, bore, and bends) and the need for variable pump speeds to adjust for fluid viscosity.
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Design and Component Quality: The use of high-quality components and efficient design features, such as large area water or air-cooled chillers and high-pressure accumulator charging valves, can significantly reduce the operating temperature of the hydraulic oil by improving system stability and reliability.
To mitigate these issues, regular maintenance, careful monitoring of system parameters, and timely adjustments are necessary to ensure the hydraulic system operates efficiently and minimizes heat generation.
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