Sunflower seeds are one of the world’s most important oil crops, making the sunflower oil press machine a core piece of equipment in numerous oil processing plants. However, the process characteristics of pressing sunflower seeds with their hulls — high fiber content and considerable fluctuation in the hull-to-kernel ratio — mean that this type of oil press machine is prone to some typical faults during long-term use. If not addressed promptly, these faults not only affect oil quality and production capacity but may also accelerate damage to equipment components. This article provides clear troubleshooting steps and practical solutions for three high-frequency fault phenomena, helping your oil equipment return to its ideal operating condition.
Fault 1: Excessively High Operating Temperature
During the continuous operation of a screw oil press machine, the machine body or oil outlet temperature may sometimes rise abnormally. This is a signal that requires vigilance.
– Fault Cause Analysis:
First, the equipment has been running continuously for a long time without the necessary cooling intervals; second, insufficient lubrication in the hydraulic system or transmission components leads to frictional overheating; third, certain internal oil press spare parts generate extra heat after wear.
– Solutions:
– Control Working Hours and Intervals:
Arrange the production rhythm reasonably to avoid prolonged, uninterrupted, full-load operation of the machine. Leave adequate idle cooling time between batches.
– Inspect the Cooling and Lubrication Systems:
Ensure that cooling fans, circulating water-cooling, or air-cooling devices are functioning properly. Regularly check the lubricant level and quality in the gearbox and bearing positions, and replace them according to the maintenance schedule.
– Investigate Internal Wear:
If the abnormal temperature persists, stop the machine and check inside the pressing chamber for loose parts or excessive friction.
Fault 2: Noticeable Decrease in Oil Extraction Efficiency
Users sometimes find that after putting in a large amount of sunflower seeds, the amount of oil extracted is far below the design specification. This is the most common sign of performance decline in oil processing equipment.
– Fault Cause Analysis:
– Severe Press Worm Wear:
This is the primary cause of declining oil yield. The press worm, a core component among oil press spare parts, becomes blunt on its helical edges and its clearance increases after prolonged friction with sunflower seed hulls, making it unable to build sufficient pressing pressure.
– Uneven Feeding:
Intermittent feeding or clumping of raw materials leads to unstable pressure inside the pressing chamber, preventing the oil from being squeezed out steadily.
– Improper Raw Material Moisture:
Materials that are too dry and hard increase internal friction, while materials that are too moist cause the oil to emulsify and hinder its flow.
– Solutions:
– Regularly Inspect and Replace the Press Worm:
Establish an inspection file for oil press spare parts. As soon as press worm wear is found to exceed the allowable range, replace it immediately with a genuine part to restore pressing efficiency.
– Optimize the Feeding Process:
Ensure uniform and continuous feeding. If necessary, configure a seed roaster in the pre-treatment stage to precisely adjust the moisture content and temperature of the sunflower seeds entering the press, bringing them to the ideal pressing condition.
– Adjust Cake Thickness:
Appropriately adjust the gap at the cake outlet to find the optimal balance between oil yield and residual oil content in the cake.
Fault 3: Poor Discharge of Oil Cake or Equipment Blockage
When using a sunflower oil press machine, difficulty in discharging the cake, or even internal blockage of the pressing cage may occur, forcing the equipment to shut down.
– Fault Cause Analysis:
– Clogged Filter Screen or Bar Cage Gaps:
After long-term use, fine sunflower hull debris and fiber can block the bar cage gaps of the pressing cage or the internal filter screen, obstructing the smooth flow of oil.
– Compacted Cake at the Outlet:
The cake becomes excessively compacted at the cake outlet, forming hard lumps that are difficult to discharge smoothly.
– Excessively Fast Feeding:
Overloading raw materials in a short period exceeds the instantaneous processing capacity of the equipment.
– Solutions:
– Regularly Clean Filter Components:
After each production run, disassemble the pressing cage and use a steel brush to clean the oil residue and debris from the bar cage gaps and filter screen. For production lines equipped with an oil filter machine, clean the filter cloths or elements simultaneously.
– Control the Feeding Speed:
Maintain a uniform and moderate feeding rate to avoid instantaneous overloading.
– Inspect the Cake Discharge Device:
Clean residual coked material from the cake outlet to ensure the cake discharge channel remains clear.
Preventive Maintenance Suggestions
Rather than making emergency repairs after a fault causes a shutdown, it is better to establish a routine preventive inspection mechanism:
1. Daily Cleaning: Empty the residual cake from the pressing chamber after production and keep the equipment clean.
2. Weekly Inspection: Check the wear condition of oil press spare parts such as the press worm and bushings; check belt tension and the gearbox oil level.
3. Monthly Maintenance: Apply fresh grease to lubrication points, clean the radiator, and tighten foundation bolts and all external connections.
4. Annual Overhaul: Replace all wear parts that have reached the end of their service life, and thoroughly check the insulation and grounding of the electrical system.
The problems of excessive temperature, reduced oil output, and poor cake discharge encountered during sunflower oil pressing may appear to be independent faults, but in reality, they are all closely related to the meticulousness of routine maintenance. A well-maintained sunflower oil press machine with spare parts in good condition will not only deliver higher oil extraction efficiency but will also provide solid assurance for the continuous production capacity of the entire oil processing plant equipment and the quality of the finished oil. If you need to order genuine oil press spare parts or require technical diagnosis for your existing equipment, please feel free to contact [KMEC]. Our technical service team is always ready to support you.