When a plunger pump is run eccentrically, that is, when the axis of rotation is not aligned with the centerline of the pump, it affects the properties of the water film between the piston and cylinder. Here are some key features of the water film in this eccentric state: 1. Changes in oil film thickness: The eccentricity of the pump causes the movement of the piston to deviate from a purely radial path. As a result, the thickness of the water film between the piston and cylinder varies along the circumference of the contact area. The film thickness reaches a maximum at the point closest to the radial path of the piston and decreases as the piston moves away from this point. 2. Uneven pressure distribution: The eccentric movement of the piston causes uneven pressure distribution on the water film. The pressure is higher on one side of the contact area and lower on the other side. This pressure difference is due to the change in radial distance between the piston and cylinder block as the eccentricity changes. 3. Squeeze film effect: Eccentricity makes the water film produce film squeeze effect. As the piston moves eccentrically, the changing radial clearance between the piston and cylinder creates a pressure gradient within the water film. This pressure gradient causes fluid to flow within the oil film, creating a squeezing action that affects film thickness and lubricity. 90-R-075-HF-5-NN-60-S-4-C7-D-03-GBA-45-45-26 90R075HF5NN60S4C7D03GBA454526 90R075-HF-5-NN-60-S-4-C7-D-03-GBA-45-45-26 90R075HF5NN60S4C7D03GBA454526 90-R-075-HF-5-NN-60-S-4-C6-D-03-GBA-21-21-24 90R075HF5NN60S4C6D03GBA212124 90R075-HF-5-NN-60-S-4-C6-D-03-GBA-21-21-24 90R075HF5NN60S4C6D03GBA212124 90-R-075-HF-5-NN-60-S-3-C7-D-03-GBA-42-42-24 90R075HF5NN60S3C7D03GBA424224 90R075-HF-5-NN-60-S-3-C7-D-03-GBA-42-42-24 90R075HF5NN60S3C7D03GBA424224 90-R-075-HF-5-NN-60-S-3-C6-E-03-GBA-42-42-24 90R075HF5NN60S3C6E03GBA424224 90R075-HF-5-NN-60-S-3-C6-E-03-GBA-42-42-24 90R075HF5NN60S3C6E03GBA424224 90-R-075-HF-5-NN-60-R-4-S1-D-03-GBA-35-35-24 90R075HF5NN60R4S1D03GBA353524 90R075-HF-5-NN-60-R-4-S1-D-03-GBA-35-35-24 90R075HF5NN60R4S1D03GBA353524 90-R-075-HF-5-NN-60-R-4-S1-C-03-GBA-35-35-24 90R075HF5NN60R4S1C03GBA353524 90-R-075-HF-5-NN-60-R-3-S1-E-03-GBA-38-38-26 90R075HF5NN60R3S1E03GBA383826 90R075-HF-5-NN-60-R-3-S1-E-03-GBA-38-38-26 90R075HF5NN60R3S1E03GBA383826 90-R-075-HF-5-NN-60-P-4-C7-E-00-GBA-42-42-24 90R075HF5NN60P4C7E00GBA424224 90R075-HF-5-NN-60-P-4-C7-E-00-GBA-42-42-24 90R075HF5NN60P4C7E00GBA424224 90-R-075-HF-5-NN-60-P-4-C7-D-04-GBA-32-32-20 90R075HF5NN60P4C7D04GBA323220 90R075-HF-5-NN-60-P-4-C7-D-04-GBA-32-32-20 90R075HF5NN60P4C7D04GBA323220 90-R-075-HF-5-NN-60-P-3-S1-D-03-GBA-26-26-24 90R075HF5NN60P3S1D03GBA262624 90-R-075-HF-5-NN-60-P-3-S1-D-00-GBA-42-42-24 90R075HF5NN60P3S1D00GBA424224 90R075-HF-5-NN-60-P-3-S1-D-00-GBA-42-42-24 90R075HF5NN60P3S1D00GBA424224 4. Boundary lubrication conditions: In certain areas of the piston path, especially where the oil film thickness is minimal, the water film may experience boundary lubrication conditions. Boundary lubrication occurs when the oil film thickness is insufficient to completely separate the contacting surfaces, resulting in occasional metal-to-metal contact. This increases friction and wear, which can affect pump performance and life. 5. Heat dissipation: The water film inside the plunger pump also plays a role in heat dissipation. The movement and shearing of the water film helps to remove the heat generated during the operation of the pump and contributes to the overall cooling of the system. In the eccentric state, the non-uniform film thickness and pressure distribution will affect the heat dissipation and may cause localized hot spots. 6. Fluid leakage: The eccentricity of the plunger pump will cause increased fluid leakage through the water film. Uneven pressure distribution and varying oil film thickness create paths for fluid to bypass the piston, resulting in reduced efficiency and potential performance degradation. Proper sealing measures, such as utilizing effective piston seals and optimizing their design, are critical to minimizing fluid leakage. 90-R-075-HF-5-CD-80-S-4-S1-E-03-GBA-42-42-24 90R075HF5CD80S4S1E03GBA424224 90R075-HF-5-CD-80-S-4-S1-E-03-GBA-42-42-24 90R075HF5CD80S4S1E03GBA424224 90-R-075-HF-5-CD-80-S-4-S1-D-03-GBA-20-20-24 90R075HF5CD80S4S1D03GBA202024 90R075-HF-5-CD-80-S-4-S1-D-03-GBA-20-20-24 90R075HF5CD80S4S1D03GBA202024 90-R-075-HF-5-CD-80-S-3-C6-E-03-GBA-42-42-24 90R075HF5CD80S3C6E03GBA424224 90R075-HF-5-CD-80-S-3-C6-E-03-GBA-42-42-24 90R075HF5CD80S3C6E03GBA424224 90-R-075-HF-5-CD-80-S-3-C6-D-03-GBA-42-42-24 90R075HF5CD80S3C6D03GBA424224 90R075-HF-5-CD-80-S-3-C6-D-03-GBA-42-42-24 90R075HF5CD80S3C6D03GBA424224 90-R-075-HF-5-CD-80-R-4-S1-D-03-GBA-35-35-28 90R075HF5CD80R4S1D03GBA353528 90R075-HF-5-CD-80-R-4-S1-D-03-GBA-35-35-28 90R075HF5CD80R4S1D03GBA353528 90-R-075-HF-5-CD-80-R-4-C7-D-03-GBA-35-35-24 90R075HF5CD80R4C7D03GBA353524 90-R-075-HF-5-CD-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5CD80R3S1D03GBA353524 90R075-HF-5-CD-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5CD80R3S1D03GBA353524 90-R-075-HF-5-CD-80-P-4-C7-E-03-GBA-42-42-24 90R075HF5CD80P4C7E03GBA424224 90R075-HF-5-CD-80-P-4-C7-E-03-GBA-42-42-24 90R075HF5CD80P4C7E03GBA424224 90-R-075-HF-5-CD-80-L-4-S1-D-03-GBA-35-35-24 90R075HF5CD80L4S1D03GBA353524 90R075-HF-5-CD-80-L-4-S1-D-03-GBA-35-35-24 90R075HF5CD80L4S1D03GBA353524 90-R-075-HF-5-CD-80-L-3-S1-E-00-GBA-26-26-20 90R075HF5CD80L3S1E00GBA262620 90R075-HF-5-CD-80-L-3-S1-E-00-GBA-26-26-20 90R075HF5CD80L3S1E00GBA262620 90-R-075-HF-5-CD-60-S-4-C7-E-03-GBA-32-32-24 90R075HF5CD60S4C7E03GBA323224 7. Deformation and instability of the water film: The eccentric movement of the piston will cause deformation and instability of the water film. The changing pressure distribution and changing film thickness can cause deformation of the film, including swelling or thinning in certain areas. These deformations affect the overall stability and performance of the water film, potentially leading to increased friction, wear and reduced lubrication. 8. Lubrication state transition: The eccentric movement of the piston will cause the water film to undergo transitions between different lubrication states. Depending on eccentricity, speed and operating conditions, the oil film can alternate between full film lubrication, mixed lubrication and boundary lubrication. These transitions affect the friction, wear and overall performance of the piston pump. 9. Vibration and noise: Due to uneven pressure distribution and oil film thickness variation, the eccentricity of the plunger pump will introduce additional vibration and noise. These vibrations and noises can be generated by the interaction between the piston and cylinder, fluid turbulence, and dynamic effects caused by eccentric motion. Proper design considerations, such as optimizing eccentricity and managing vibration levels, are important to reduce noise and maintain smooth operation. 90R075-HF-5-CD-60-S-4-C7-E-03-GBA-32-32-24 90R075HF5CD60S4C7E03GBA323224 90-R-075-HF-5-CD-60-S-3-C7-D-02-GBA-42-42-30 90R075HF5CD60S3C7D02GBA424230 90R075-HF-5-CD-60-S-3-C7-D-02-GBA-42-42-30 90R075HF5CD60S3C7D02GBA424230 90-R-075-HF-5-CD-60-S-3-C7-C-03-GBA-42-42-24 90R075HF5CD60S3C7C03GBA424224 90R075-HF-5-CD-60-S-3-C7-C-03-GBA-42-42-24 90R075HF5CD60S3C7C03GBA424224 90-R-075-HF-5-CD-60-P-3-S1-D-03-GBA-26-26-24 90R075HF5CD60P3S1D03GBA262624 90-R-075-HF-5-BC-80-S-4-S1-D-03-GBA-35-35-24 90R075HF5BC80S4S1D03GBA353524 90R075-HF-5-BC-80-S-4-S1-D-03-GBA-35-35-24 90R075HF5BC80S4S1D03GBA353524 90-R-075-HF-5-BC-80-S-4-C7-E-03-GBA-35-35-24 90R075HF5BC80S4C7E03GBA353524 90R075-HF-5-BC-80-S-4-C7-E-03-GBA-35-35-24 90R075HF5BC80S4C7E03GBA353524 90-R-075-HF-5-BC-80-S-4-C7-E-03-GBA-32-32-24 90R075HF5BC80S4C7E03GBA323224 90-R-075-HF-5-BC-80-S-4-C6-E-03-GBA-35-35-24 90R075HF5BC80S4C6E03GBA353524 90-R-075-HF-5-BC-80-S-3-C6-D-03-GBA-42-42-24 90R075HF5BC80S3C6D03GBA424224 90R075-HF-5-BC-80-S-3-C6-D-03-GBA-42-42-24 90R075HF5BC80S3C6D03GBA424224 90-R-075-HF-5-BC-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5BC80R3S1D03GBA353524 90R075-HF-5-BC-80-R-3-S1-D-03-GBA-35-35-24 90R075HF5BC80R3S1D03GBA353524 90-R-075-HF-5-BC-80-L-3-S1-E-03-GBA-29-29-24 90R075HF5BC80L3S1E03GBA292924 90R075-HF-5-BC-80-L-3-S1-E-03-GBA-29-29-24 90R075HF5BC80L3S1E03GBA292924 90-R-075-HF-5-BC-80-D-3-C7-L-03-GBA-35-35-30 90R075HF5BC80D3C7L03GBA353530 90R075-HF-5-BC-80-D-3-C7-L-03-GBA-35-35-30 90R075HF5BC80D3C7L03GBA353530 10. Experimental analysis: In order to understand and characterize the water film behavior under eccentric conditions, experimental analysis techniques can be used. These may include measurement of film thickness using non-invasive methods such as optical interferometry or capacitive sensors, pressure distribution analysis, and temperature measurement to assess heat dissipation. Experimental analysis provides valuable insights into the actual behavior of water films and helps to validate designs and optimization efforts. Understanding the properties of the water film under eccentric conditions is critical to the proper design and operation of piston pumps. By considering factors such as film thickness variations, pressure distribution, fluid leakage, lubrication patterns and vibration characteristics, engineers can optimize pump performance, efficiency and durability. Advanced simulation techniques, such as Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEA), can also be used to model and predict water film behavior under eccentric conditions, thereby aiding in the design optimization process.