Failure analysis of auxiliary support bearing/shaft friction pairs in hydraulic axial piston pumps involves examining potential causes of failure and determining appropriate corrective actions. Here are some common failure modes and possible causes to consider: 1. Excessive wear: - Insufficient lubrication: Insufficient lubrication leads to increased friction and wear between the bearing and shaft surfaces. - Contaminated Lubricants: The presence of dirt, debris or other contaminants in lubricants can accelerate wear. 2. Fatigue failure: - Overloading: Excessive axial or radial loads on bearings or shafts can lead to fatigue failure over time. -Running at high speed: If the pump is running at high speed, it will generate higher stress and increase the probability of fatigue failure. 3. Fretting corrosion: - Fretting between the bearing and shaft surfaces: Vibration or oscillations can cause fretting, which can lead to fretting corrosion and subsequent failure. 90-L-250-KA-1-CD-80-S-3-C8-K-00-NNN-42-42-24 90L250KA1CD80S3C8K00NNN424224 90L250-KA-1-CD-80-T-3-C8-K-03-NNN-35-35-24 90L250KA1CD80T3C8K03NNN353524 90-L-250-KA-1-CD-80-T-3-C8-K-03-NNN-35-35-24 90L250KA1CD80T3C8K03NNN353524 90L250-KA-1-CD-80-T-4-C8-K-03-NNN-35-35-24 90L250KA1CD80T4C8K03NNN353524 90-L-250-KA-1-CD-80-T-4-C8-K-03-NNN-35-35-24 90L250KA1CD80T4C8K03NNN353524 90L250-KA-1-CD-80-T-4-C8-K-03-NNN-35-35-30 90L250KA1CD80T4C8K03NNN353530 90-L-250-KA-1-CD-80-T-4-C8-K-03-NNN-35-35-30 90L250KA1CD80T4C8K03NNN353530 90-L-250-KA-1-CD-80-T-4-F1-J-03-NNN-42-42-24 90L250KA1CD80T4F1J03NNN424224 90-L-250-KA-1-DE-80-T-3-C8-K-03-NNN-32-32-24 90L250KA1DE80T3C8K03NNN323224 90L250-KA-1-EG-80-T-3-C8-K-03-NNN-35-35-20 90L250KA1EG80T3C8K03NNN353520 90-L-250-KA-1-EG-80-T-3-C8-K-03-NNN-35-35-20 90L250KA1EG80T3C8K03NNN353520 90L250-KA-1-EG-80-T-4-C8-J-02-NNN-35-35-24 90L250KA1EG80T4C8J02NNN353524 90-L-250-KA-1-EG-80-T-4-C8-J-02-NNN-35-35-24 90L250KA1EG80T4C8J02NNN353524 90L250-KA-1-EG-80-T-4-C8-K-03-NNN-35-35-30 90L250KA1EG80T4C8K03NNN353530 90-L-250-KA-1-EG-80-T-4-C8-K-03-NNN-35-35-30 90L250KA1EG80T4C8K03NNN353530 90L250-KA-1-NN-80-S-3-C8-K-03-NNN-23-23-28 90L250KA1NN80S3C8K03NNN232328 90-L-250-KA-1-NN-80-S-3-C8-K-03-NNN-23-23-28 90L250KA1NN80S3C8K03NNN232328 90L250-KA-1-NN-80-S-3-C8-K-04-NNN-35-35-24 90L250KA1NN80S3C8K04NNN353524 90-L-250-KA-1-NN-80-S-3-C8-K-04-NNN-35-35-24 90L250KA1NN80S3C8K04NNN353524 90-L-250-KA-1-NN-80-S-3-F1-J-03-NNN-35-35-28 90L250KA1NN80S3F1J03NNN353528 4. Improper installation or alignment: - Misalignment: Improper alignment between bearing and shaft can lead to uneven load distribution and premature failure. - Improper tightening: Under or over tightening of fasteners can affect load distribution and cause bearing misalignment. 5. Substantive issues: - Improper material selection: Bearing or shaft materials may not be suitable for service conditions, resulting in accelerated wear or deformation. - Insufficient hardness or surface treatment: Insufficient hardness or lack of proper surface treatment can lead to reduced wear resistance and premature failure. For a comprehensive failure analysis, you can follow the steps below: 1. Visual inspection: Check the failed component for signs of wear, pitting, cracks, or other visible damage. Note the location and extent of damage. 2. Collect operating data: Collect information about operating conditions such as pump speed, load, temperature, lubrication system, and maintenance history. Any deviation from recommended specifications should be identified. 3. Analyzing the Lubrication System: Evaluate the lubrication system to ensure selection of the correct lubricant, adequate flow and contamination control. Check for any blockages, leaks or malfunctions that could affect lubrication. 4. Check alignment and installation: Verify bearing and shaft alignment and check installation procedures. Make sure the correct tightening torque is applied and the alignment is within specification. 5. Material analysis: If possible, material testing and analysis are performed to evaluate the mechanical properties, hardness and surface characteristics of bearing and shaft materials. 6. Failure mode determination: Based on observation and analysis, determine the main failure mode and the root cause of the problem. 90L250-KA-1-NN-80-S-4-F1-J-03-NNN-32-32-24 90L250KA1NN80S4F1J03NNN323224 90-L-250-KA-1-NN-80-S-4-F1-J-03-NNN-32-32-24 90L250KA1NN80S4F1J03NNN323224 90L250-KA-1-NN-80-T-3-C8-K-03-NNN-35-35-20 90L250KA1NN80T3C8K03NNN353520 90-L-250-KA-1-NN-80-T-3-C8-K-03-NNN-35-35-20 90L250KA1NN80T3C8K03NNN353520 90-L-250-KA-1-NN-80-T-3-F1-K-03-NNN-29-29-24 90L250KA1NN80T3F1K03NNN292924 90L250-KA-1-NN-80-T-4-F1-K-03-NNN-20-20-24 90L250KA1NN80T4F1K03NNN202024 90-L-250-KA-1-NN-80-T-4-F1-K-03-NNN-20-20-24 90L250KA1NN80T4F1K03NNN202024 90L250-KA-2-BC-80-T-3-C8-K-00-NNN-35-35-24 90L250KA2BC80T3C8K00NNN353524 90-L-250-KA-2-BC-80-T-3-C8-K-00-NNN-35-35-24 90L250KA2BC80T3C8K00NNN353524 90L250-KA-2-NN-80-S-3-C8-K-00-NNN-38-38-28 90L250KA2NN80S3C8K00NNN383828 90-L-250-KA-2-NN-80-S-3-C8-K-00-NNN-38-38-28 90L250KA2NN80S3C8K00NNN383828 90L250-KA-2-NN-80-S-3-F1-J-00-NNN-45-45-28 90L250KA2NN80S3F1J00NNN454528 90-L-250-KA-2-NN-80-S-3-F1-J-00-NNN-45-45-28 90L250KA2NN80S3F1J00NNN454528 90L250-KA-2-NN-80-T-3-F1-J-03-NNN-42-42-24 90L250KA2NN80T3F1J03NNN424224 90-L-250-KA-2-NN-80-T-3-F1-J-03-NNN-42-42-24 90L250KA2NN80T3F1J03NNN424224 90-L-250-KA-5-AB-80-S-3-C8-K-02-NNN-26-26-28 90L250KA5AB80S3C8K02NNN262628 90L250-KA-5-AB-80-T-3-C8-J-04-NNN-42-42-24 90L250KA5AB80T3C8J04NNN424224 90-L-250-KA-5-AB-80-T-3-C8-J-04-NNN-42-42-24 90L250KA5AB80T3C8J04NNN424224 90L250-KA-5-AB-80-T-3-F1-K-03-NNN-35-35-28 90L250KA5AB80T3F1K03NNN353528 90-L-250-KA-5-AB-80-T-3-F1-K-03-NNN-35-35-28 90L250KA5AB80T3F1K03NNN353528 7. Corrective Action: Once the failure mode and root cause are identified, take appropriate corrective action, which may include improving lubrication, adjusting alignment, upgrading materials, or modifying the design. 8. Preventive measures: Implement preventive measures to avoid similar failures in the future, such as regular maintenance, proper lubrication measures and monitoring of operating parameters. 9. Performance testing: Performance testing is performed on the pump to evaluate its output, efficiency and overall functionality. Compare the results to specified performance parameters to identify any discrepancies or unusual behavior. 10. Vibration analysis: Vibration analysis is performed to evaluate the dynamic behavior of the pump system. Excessive vibration can indicate misalignment, imbalance or other problems that can lead to bearing and shaft failure. 11. Finite Element Analysis (FEA): Use FEA software to simulate the operating conditions of the pump, and analyze the stress distribution, load transfer and deformation modes in the bearing and shaft components. This analysis provides insight into potential failure modes and areas of concern. 12. Failure Mode and Effects Analysis (FMEA): An FMEA is performed to systematically assess potential failure modes, their causes, effects and associated risks. Prioritize failure modes based on their severity and likelihood, enabling you to focus on critical areas during corrective action. 13. Documentation and Reporting: Maintain detailed records of the failure analysis process, including findings, observations, tests performed, and actions taken. Prepare a comprehensive report summarizing the analysis, root causes, and recommended corrective and preventive actions. 90L250-KA-5-AB-80-T-3-F1-K-03-NNN-42-42-24 90L250KA5AB80T3F1K03NNN424224 90-L-250-KA-5-AB-80-T-3-F1-K-03-NNN-42-42-24 90L250KA5AB80T3F1K03NNN424224 90-L-250-KA-5-AB-80-T-4-C8-J-03-NNN-23-23-24 90L250KA5AB80T4C8J03NNN232324 90L250-KA-5-AB-80-T-4-C8-J-03-NNN-32-32-24 90L250KA5AB80T4C8J03NNN323224 90-L-250-KA-5-AB-80-T-4-C8-J-03-NNN-32-32-24 90L250KA5AB80T4C8J03NNN323224 90L250-KA-5-AB-80-T-4-C8-J-05-NNN-23-23-24 90L250KA5AB80T4C8J05NNN232324 90-L-250-KA-5-AB-80-T-4-C8-J-05-NNN-23-23-24 90L250KA5AB80T4C8J05NNN232324 90-L-250-KA-5-AB-80-T-4-F1-K-03-NNN-20-20-22 90L250KA5AB80T4F1K03NNN202022 90L250-KA-5-AB-80-T-4-F1-K-03-NNN-21-21-28 90L250KA5AB80T4F1K03NNN212128 90-L-250-KA-5-AB-80-T-4-F1-K-03-NNN-21-21-28 90L250KA5AB80T4F1K03NNN212128 90L250-KA-5-BB-80-S-3-C8-J-03-NNN-26-26-24 90L250KA5BB80S3C8J03NNN262624 90-L-250-KA-5-BB-80-S-3-C8-J-03-NNN-26-26-24 90L250KA5BB80S3C8J03NNN262624 90L250-KA-5-BC-80-D-3-C8-L-03-NNN-35-35-24 90L250KA5BC80D3C8L03NNN353524 90-L-250-KA-5-BC-80-D-3-C8-L-03-NNN-35-35-24 90L250KA5BC80D3C8L03NNN353524 90L250-KA-5-BC-80-D-3-F1-L-03-NNN-42-42-20 90L250KA5BC80D3F1L03NNN424220 90-L-250-KA-5-BC-80-D-3-F1-L-03-NNN-42-42-20 90L250KA5BC80D3F1L03NNN424220 90L250-KA-5-BC-80-S-3-C8-J-05-NNN-42-42-24 90L250KA5BC80S3C8J05NNN424224 90-L-250-KA-5-BC-80-S-3-C8-J-05-NNN-42-42-24 90L250KA5BC80S3C8J05NNN424224 90L250-KA-5-BC-80-S-3-C8-K-00-NNN-35-14-30-G005 90L250KA5BC80S3C8K00NNN351430G005 90-L-250-KA-5-BC-80-S-3-C8-K-00-NNN-35-14-30-G005 90L250KA5BC80S3C8K00NNN351430G005 14. Ongoing Monitoring and Maintenance: Implement a proactive monitoring and maintenance program to regularly inspect bearing and shaft components, monitor operating parameters, and ensure proper lubrication and calibration. This continuous monitoring helps to detect potential problems early and prevent future failures. Remember that every failure analysis is unique and the exact steps may vary depending on pump design, operating conditions and available resources. It is crucial to involve experienced professionals, such as pump engineers or specialists, who can provide guidance throughout the analysis process and assist in implementing effective solutions. In addition, it is recommended to follow any specific guidelines provided by the pump manufacturer for failure analysis and maintenance procedures to ensure compliance with warranty requirements and industry best practices.