The oil film on the cylinder interface of a hydraulic pump plays a vital role in its performance and life. The following are some of the main properties of the oil film: 1. Lubrication: The main function of the oil film is to provide lubrication between the cylinder block and other moving parts such as pistons or plungers. It forms a thin layer of oil that prevents direct metal-to-metal contact, reducing friction and wear. The oil film ensures smooth operation and minimizes the risk of damage to pump components. 2. Sealing: The oil film helps to create a seal between the cylinder block and the piston or plunger. It prevents hydraulic oil from leaking from the high pressure side of the pump to the low pressure side. The integrity of the oil film that acts as a sealing barrier is critical to maintaining the efficiency and performance of hydraulic systems. 3. Load distribution: The oil film helps to distribute the load evenly on the interface between the cylinder block and moving parts. It helps reduce localized stress concentrations by spreading the load over a larger contact area. This ensures that the forces acting on the pump components are evenly distributed, increasing durability and preventing premature wear or failure. 4. Viscosity and thickness: The viscosity of the oil affects the thickness of the oil film. Oils used in hydraulic pumps usually have a specific viscosity range to ensure optimum lubrication and sealing performance. The thickness of the oil film may vary depending on factors such as operating conditions, pressure, temperature and clearances between components. A sufficiently thick and stable oil film is necessary to provide effective lubrication and sealing. 90R100-KA-5-BC-60-S-3-C7-E-03-GBA-35-35-24 90R100KA5BC60S3C7E03GBA353524 90-R-100-KA-5-BC-60-S-3-C7-E-03-GBA-35-35-24 90R100KA5BC60S3C7E03GBA353524 90R100-KA-5-BC-60-S-3-C7-E-03-GBA-38-38-24 90R100KA5BC60S3C7E03GBA383824 90-R-100-KA-5-BC-60-S-3-C7-E-03-GBA-38-38-24 90R100KA5BC60S3C7E03GBA383824 90R100-KA-5-BC-60-S-3-C7-E-03-GBA-42-42-24 90R100KA5BC60S3C7E03GBA424224 90-R-100-KA-5-BC-60-S-3-C7-E-03-GBA-42-42-24 90R100KA5BC60S3C7E03GBA424224 90R100-KA-5-BC-60-S-3-S1-F-03-GBA-42-42-24 90R100KA5BC60S3S1F03GBA424224 90-R-100-KA-5-BC-60-S-3-S1-F-03-GBA-42-42-24 90R100KA5BC60S3S1F03GBA424224 90R100-KA-5-BC-60-S-3-T2-E-03-GBA-42-42-30 90R100KA5BC60S3T2E03GBA424230 90-R-100-KA-5-BC-60-S-3-T2-E-03-GBA-42-42-30 90R100KA5BC60S3T2E03GBA424230 90R100-KA-5-BC-60-S-4-C7-E-03-GBA-42-42-24 90R100KA5BC60S4C7E03GBA424224 90-R-100-KA-5-BC-60-S-4-C7-E-03-GBA-42-42-24 90R100KA5BC60S4C7E03GBA424224 90R100-KA-5-BC-60-S-4-S1-E-03-GBA-35-35-24 90R100KA5BC60S4S1E03GBA353524 90-R-100-KA-5-BC-60-S-4-S1-E-03-GBA-35-35-24 90R100KA5BC60S4S1E03GBA353524 90R100-KA-5-BC-60-S-4-S1-F-04-GBA-42-42-24 90R100KA5BC60S4S1F04GBA424224 90-R-100-KA-5-BC-60-S-4-S1-F-04-GBA-42-42-24 90R100KA5BC60S4S1F04GBA424224 90R100-KA-5-BC-80-L-3-C7-E-03-GBA-30-30-24 90R100KA5BC80L3C7E03GBA303024 90-R-100-KA-5-BC-80-L-3-C7-E-03-GBA-30-30-24 90R100KA5BC80L3C7E03GBA303024 90R100-KA-5-BC-80-L-3-C7-E-03-GBA-42-42-24 90R100KA5BC80L3C7E03GBA424224 90-R-100-KA-5-BC-80-L-3-C7-E-03-GBA-42-42-24 90R100KA5BC80L3C7E03GBA424224 5. Fluid dynamic effect: Due to the relative motion between the cylinder block and the moving parts, the oil film is subject to the hydrodynamic effect. These effects, such as pressure gradients and shear forces, affect the behavior and properties of the oil film. Proper design and operating conditions aim to optimize these hydrodynamic effects to enhance lubrication, minimize friction and maintain efficient pump performance. 6. Oil film adhesion and stability: The adhesion and stability of the oil film are critical to maintaining its effectiveness. The oil film should adhere well to the surface of the cylinder block and moving parts to ensure continuous lubrication and sealing. It should also be able to resist being squeezed out or broken by the high pressures and forces encountered in the pump. Robust and reliable film formation is necessary for consistent pump performance. 7. Contaminant management: The oil film should be able to effectively manage contaminants, such as particles or air bubbles, to maintain its integrity. Contaminants can interfere with the lubricating and sealing properties of the oil film, leading to increased friction, wear and potential damage to pump components. Proper filtration and maintenance practices help minimize the presence of contaminants and maintain the quality of the oil film. 8. Boundary lubrication: In some cases, the oil film may experience boundary lubrication conditions, especially at startup or under high loads. Boundary lubrication refers to situations where the oil film thickness is extremely small and direct metal-to-metal contact may occur intermittently. The oil film must have additives or properties that provide boundary lubrication, such as antiwear or extreme pressure (EP) additives, to protect surfaces from excessive wear and damage. 90-R-100-KA-5-BC-80-L-3-F1-F-00-GBA-20-20-28 90R100KA5BC80L3F1F00GBA202028 90R100-KA-5-BC-80-L-3-S1-D-03-GBA-42-42-24 90R100KA5BC80L3S1D03GBA424224 90-R-100-KA-5-BC-80-L-3-S1-D-03-GBA-42-42-24 90R100KA5BC80L3S1D03GBA424224 90R100-KA-5-BC-80-L-4-C7-E-03-GBA-42-42-24 90R100KA5BC80L4C7E03GBA424224 90-R-100-KA-5-BC-80-L-4-C7-E-03-GBA-42-42-24 90R100KA5BC80L4C7E03GBA424224 90R100-KA-5-BC-80-L-4-C7-E-05-GBA-29-29-24 90R100KA5BC80L4C7E05GBA292924 90-R-100-KA-5-BC-80-L-4-C7-E-05-GBA-29-29-24 90R100KA5BC80L4C7E05GBA292924 90R100-KA-5-BC-80-L-4-T2-E-03-GBA-32-32-24 90R100KA5BC80L4T2E03GBA323224 90-R-100-KA-5-BC-80-L-4-T2-E-03-GBA-32-32-24 90R100KA5BC80L4T2E03GBA323224 90R100-KA-5-BC-80-L-4-T2-E-03-GBA-35-35-24 90R100KA5BC80L4T2E03GBA353524 90-R-100-KA-5-BC-80-L-4-T2-E-03-GBA-35-35-24 90R100KA5BC80L4T2E03GBA353524 90R100-KA-5-BC-80-P-3-C7-E-03-GBA-42-42-24 90R100KA5BC80P3C7E03GBA424224 90-R-100-KA-5-BC-80-P-3-C7-E-03-GBA-42-42-24 90R100KA5BC80P3C7E03GBA424224 90R100-KA-5-BC-80-P-3-C7-E-04-GBA-45-45-24 90R100KA5BC80P3C7E04GBA454524 90-R-100-KA-5-BC-80-P-3-C7-E-04-GBA-45-45-24 90R100KA5BC80P3C7E04GBA454524 90R100-KA-5-BC-80-P-3-F1-E-03-GBA-35-35-24-G005 90R100KA5BC80P3F1E03GBA353524G005 90-R-100-KA-5-BC-80-P-3-F1-E-03-GBA-35-35-24-G005 90R100KA5BC80P3F1E03GBA353524G005 90R100-KA-5-BC-80-P-3-S1-E-03-GBA-26-26-24 90R100KA5BC80P3S1E03GBA262624 90-R-100-KA-5-BC-80-P-3-S1-E-03-GBA-26-26-24 90R100KA5BC80P3S1E03GBA262624 90R100-KA-5-BC-80-P-4-S1-E-04-GBA-42-42-24 90R100KA5BC80P4S1E04GBA424224 9. Thermal management: The oil film helps dissipate the heat generated during the operation of the pump. The movement and shear of the oil within the pump generates frictional heat. The oil film acts as a thermal barrier, carrying away heat and preventing the cylinder block and other components from overheating. Effective thermal management of the oil film is critical to maintaining stable pump performance and preventing thermal degradation of the lubricant. 10. Surface finish and quality: The surface finish and quality of the cylinder block and moving parts are critical to the formation and maintenance of an effective oil film. Proper machining and finishing processes ensure that the surface has the necessary smoothness, flatness and surface roughness parameters to promote optimum oil film formation. Irregular, scratched or rough surfaces can disrupt the oil film and impair its lubricating and sealing properties. 11. Prevention of oil contamination: Oil contamination can negatively affect the properties of the oil film. Particulate matter, water, air and other contaminants present in hydraulic systems can disrupt oil film formation and stability. Regular oil filtration, maintenance of clean hydraulic oil, and proper sealing measures help minimize the ingress of contaminants and maintain the integrity of the oil film. 12. Compatibility with sealing materials: The oil film should be compatible with the sealing materials used in hydraulic pumps. Some hydraulic systems may employ different types of seals that come into contact with the oil film, such as elastomeric or lip seals. Lubricants should be compatible with these seals to prevent swelling, degradation, or loss of sealing effectiveness. 90-R-100-KA-5-BC-80-P-4-S1-E-04-GBA-42-42-24 90R100KA5BC80P4S1E04GBA424224 90R100-KA-5-BC-80-P-4-T2-F-03-GBA-35-35-24 90R100KA5BC80P4T2F03GBA353524 90-R-100-KA-5-BC-80-P-4-T2-F-03-GBA-35-35-24 90R100KA5BC80P4T2F03GBA353524 90R100-KA-5-BC-80-R-3-S1-E-03-GBA-35-35-24 90R100KA5BC80R3S1E03GBA353524 90-R-100-KA-5-BC-80-R-3-S1-E-03-GBA-35-35-24 90R100KA5BC80R3S1E03GBA353524 90R100-KA-5-BC-80-R-3-S1-F-03-GBA-35-35-24 90R100KA5BC80R3S1F03GBA353524 90-R-100-KA-5-BC-80-R-3-S1-F-03-GBA-35-35-24 90R100KA5BC80R3S1F03GBA353524 90R100-KA-5-BC-80-R-4-C7-E-03-GBA-26-26-24 90R100KA5BC80R4C7E03GBA262624 90-R-100-KA-5-BC-80-R-4-C7-E-03-GBA-26-26-24 90R100KA5BC80R4C7E03GBA262624 90R100-KA-5-BC-80-R-4-C7-F-05-GBA-26-26-24 90R100KA5BC80R4C7F05GBA262624 90-R-100-KA-5-BC-80-R-4-C7-F-05-GBA-26-26-24 90R100KA5BC80R4C7F05GBA262624 90R100-KA-5-BC-80-S-3-C7-E-02-GBA-42-42-24 90R100KA5BC80S3C7E02GBA424224 90-R-100-KA-5-BC-80-S-3-C7-E-02-GBA-42-42-24 90R100KA5BC80S3C7E02GBA424224 90R100-KA-5-BC-80-S-3-C7-E-03-GBA-26-26-24 90R100KA5BC80S3C7E03GBA262624 90-R-100-KA-5-BC-80-S-3-C7-E-03-GBA-26-26-24 90R100KA5BC80S3C7E03GBA262624 90R100-KA-5-BC-80-S-3-C7-E-03-GBA-35-35-24 90R100KA5BC80S3C7E03GBA353524 90-R-100-KA-5-BC-80-S-3-C7-E-03-GBA-35-35-24 90R100KA5BC80S3C7E03GBA353524 90R100-KA-5-BC-80-S-3-C7-E-03-GBA-42-42-24 90R100KA5BC80S3C7E03GBA424224 90-R-100-KA-5-BC-80-S-3-C7-E-03-GBA-42-42-24 90R100KA5BC80S3C7E03GBA424224 90R100-KA-5-BC-80-S-3-C7-F-03-GBA-26-26-24 90R100KA5BC80S3C7F03GBA262624 13. Operating Condition Considerations: Under different operating conditions, the characteristics of the oil film may vary. Factors such as temperature, pressure, speed and load affect the behavior and performance of the oil film. It is important to select a lubricant suitable for the specific operating conditions of a hydraulic pump to ensure optimum film formation and performance. 14. Monitoring and analysis: Regular monitoring and analysis of oil film characteristics can provide an in-depth understanding of the condition of the hydraulic pump. Oil analysis techniques such as viscosity measurement, wear particle analysis and contaminant analysis can help detect any anomalies or degradation in the oil film. This allows maintenance or corrective actions to be taken in a timely manner to maintain pump performance and service life. Understanding the properties of the oil film and taking appropriate steps to maintain its integrity are critical to the reliable and efficient operation of hydraulic pumps. To ensure the proper functioning of the oil film and the overall hydraulic system, the manufacturer's recommendations, industry standards and regular maintenance practices should be followed.