Vane tip detachment in a positive displacement vane pump

1998 ◽  
Vol 12 (5) ◽  
pp. 881-887 ◽  
Author(s):  
Myung-Rae Cho ◽  
Dong-Chul Han
Keyword(s):  
Vane Pump ◽  
Positive Displacement ◽  
Vane Tip

A Dynamic Analysis on the Transition Curve of Profiled Chamber Metering Pump

2016 ◽  
Vol 138 (7) ◽  
Author(s):  
Hua Lei ◽  
Huijün Hu ◽  
Yang Lu
Keyword(s):  
Dynamic Analysis ◽  
Mechanical Vibration ◽  
Transition Curve ◽  
Mechanical Resistance ◽  
Vane Pump ◽  
Pump System ◽  
Positive Displacement ◽  
The Face ◽  
Dynamic Performances ◽  
Loss Control

A profiled chamber metering pump (PCMP) is a new type of positive-displacement vane pump which is composed of a special stator and a rotor–slide assembly. The face-shaped curve of the inner chamber of the stator is formed by means of two quarter circular arcs and two quarter noncircular arcs, and one of the two quarter noncircular arcs is defined as transition curve. The geometry of the transition curve directly affects the dynamic performances of the pump system, including its mechanical vibration, friction, wear, and kinetic losses. This paper discusses a set of dynamic analysis methods that combine kinetic loss control with vibration control for optimization of the transition curve of the PCMP. At first, basic conception and work line on the method are explained. In a second step, by means of force analysis, a kinetic loss model is established. Then, the model is used to examine a group of vibration optimized curves in polynomial form, and kinetic losses caused by different mechanical resistance forces are calculated. Finally, through a comparison analysis together with vibration and kinetic losses, comprehensive optimal transition curves can be obtained.

Analysis of Pump Induced Radiated Noise From Undersea Vehicles

2001 ◽  
Author(s):  
Scott E. Hassan ◽  
Raymond W. Roberts
Keyword(s):  
Element Model ◽  
Vane Pump ◽  
Radiated Noise ◽  
Positive Displacement ◽  
Radiated Power ◽  
Simulation Based Design ◽  
Simulation Based ◽  
Undersea Vehicle ◽  
The Many ◽  
Pump Inlet

Abstract Positive displacement pumps are one of the many potential noise and vibration sources associated with undersea vehicles. This paper presents an approach to predict the tonals radiated from vane-type pumps mounted in undersea vehicles. The approach is based on using a numerical model of a vane pump coupled to an analytical model of the pump inlet hose and a finite element model of the hull and internal structure associated with the fluid-loaded undersea vehicle. An illustrative example is presented that demonstrates the influence of the various propagation paths and pump parameters on the overall radiated power. The basic approach can be readily extended and implemented as part of a simulation based design process for managing vehicle acoustics and vibration.

The Vane Bearing—A Self-Pressurizing Journal Bearing

1975 ◽  
Vol 189 (1) ◽  
pp. 99-106 ◽  
Author(s):  
C. Ettles
Keyword(s):  
Theoretical Analysis ◽  
Journal Bearing ◽  
Load Capacity ◽  
Vane Pump ◽  
Power Requirement ◽  
Displacement Effect ◽  
Oil Film ◽  
Hydrostatic Bearing ◽  
Positive Displacement ◽  
Exit Port

If the shaft of a journal bearing could be made to have a number of pressure sources which travel with the shaft, the load capacity of the oil film could be greatly enhanced. This paper describes the development of a concept in which the pressure sources arise from a positive displacement effect due to the eccentricity of the shaft within the bearing. The configuration has similarities to the rotor of a vane pump in which the entry port is open and the exit port closed. The bearing could be described as a hybrid hydrodynamic-hydrostatic bearing where the hydrostatic supply is self-contained and self-generated. A number of methods of causing this self-pressurization are discussed. A theoretical analysis shows that load (or Sommerfeld) number improvement factors in the range 3–10 are quite feasible at the expense of an increased flow and power requirement.

scholarly journals SURGE IN A PRESSURE-COMPENSATED POSITIVE DISPLACEMENT VANE-PUMP

1996 ◽  
Vol 1996 (3) ◽  
pp. 85-90
Author(s):  
Hisanori UENO ◽  
Atushi OKAJIMA ◽  
Yoshihiro OJI ◽  
Takanori HONDA
Keyword(s):  
Vane Pump ◽  
Positive Displacement

Lubrication and Fluid Film Study on the Vane Tip in a Vane Pump Hydraulic Transmission Considering a Fluid and Structure Interaction

2021 ◽  
Vol 143 (12) ◽  
Author(s):  
Feng Wang ◽  
Zhenxing Sun ◽  
Wieslaw Fiebig ◽  
Bing Xu ◽  
Kim A. Stelson
Keyword(s):  
Film Thickness ◽  
Radial Motion ◽  
Output Shaft ◽  
Fluid Film ◽  
Chamber Pressure ◽  
Vane Pump ◽  
Thickness Change ◽  
Modeling Approach ◽  
Fluid Film Thickness ◽  
Vane Tip

Abstract A mathematical modeling approach to determine fluid film thickness on the vane tip in a vane pump transmission is developed. The transmission is based on a double-acting vane pump with an additional output shaft coupled to a floating ring. Owing to the floating ring design, the internal viscous friction helps to drive the output shaft, whereas the friction is turned into heat in a conventional vane pump. To study the mechanical efficiency, it is crucial to investigate the fluid film thickness between the vane tip and the ring inner surface. The modeling approach in this study takes the interactions between vane radial motion and chamber pressure dynamics into consideration, without using a computational fluid dynamics approach. The lubrication on the vane tip is considered as elasto-hydrodynamic lubrication and the fluid film thickness calculation is based on the Hooke lubrication diagram. Results show that the developed simulation model is capable of revealing the fluid film thickness change and vane radial motion in different operation regions. Sensitivity studies of several parameters on the minimum fluid film thickness are also presented.

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