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.

Design and optimization of the transition curve in the novel profiled chamber metering pump

2020 ◽  
Vol 234 (3) ◽  
pp. 435-446
Author(s):  
Li Liu ◽  
Chuan Ding ◽  
Pengfei Wang
Keyword(s):  
Dynamic Performance ◽  
Mechanical Vibration ◽  
Optimization Method ◽  
Friction Model ◽  
Transition Curve ◽  
Dissipated Energy ◽  
Design And Optimization ◽  
New Strategy ◽  
The Face ◽  
Transition Curves

To better understand the optimization of the stator profile to improve the dynamic performance of a novel profiled chamber metering pump, this paper presents a dynamic analysis method for transition curve design and optimization of the profiled chamber. The face-shaped curve of the inner chamber of the stator is formed of two quarter circular arcs and two quarter noncircular arcs, and the two quarter noncircular arcs are defined as transition curves, which directly affect the mechanical vibration, friction, and wear of the profiled chamber metering pump. The proposed design and optimization method combine a friction analysis with the motion control of the moving parts. The approach based on a new strategy mainly includes three steps. For the first step, based on motion analysis, the trigonometric function and polynomial function are adopted to derive the candidate transition curves that have different order of continuity. Secondly, a friction model between the slides and the stator is established, by means of kinematic and force analysis of the slides. Then, the model is used to examine the friction dissipated energy for different candidate transition curves. Finally, through a comparison analysis of motion parameters and energy losses, comprehensive optimal transition curves are obtained. This three-step analytical work is proved to be efficient in the design of the transition curves.

Testing and Analysis of the Dynamic Characteristics of Vertical Machining Centers

2011 ◽  
Vol 52-54 ◽  
pp. 1509-1514
Author(s):  
Wang Yi ◽  
Jian Fu Zhang ◽  
Chao Xu ◽  
Zhi Jun Wu ◽  
Ding Wen Yu
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Vibration Spectrum ◽  
Comparison Method ◽  
Modal Parameters ◽  
Modal Characteristic ◽  
Machining Center ◽  
Comprehensive Comparison ◽  
Dynamic Performances ◽  
Machine Spindle

This paper analyzed the dynamic performances of vertical machining center and investigated the problems of dynamiccharacteristics. The modal analysis in both experiment and simulation wascarried out to obtain the modal parameters. The vibrations of the machine spindle were tested to obtain the vibration spectrum under different spindle speeds. It synthesized and compared with the vibration and modal characteristic in order to investigatethe weak parts of the structure. It is concluded that modal characteristic has something to do with the vibration, and there is eccentric between the active rotor and driven rotor. This comprehensive comparison method for dynamic analysis is very effective.

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

Dynamic analysis of the pump system based on MOC–CFD coupled method

2015 ◽  
Vol 78 ◽  
pp. 60-69 ◽  
Author(s):  
Shuai Yang ◽  
Xin Chen ◽  
Dazhuan Wu ◽  
Peng Yan
Keyword(s):  
Dynamic Analysis ◽  
Pump System ◽  
Coupled Method

Dynamic Characteristics and Design Criteria for a Class of Vibration-Producing Machines

1963 ◽  
Vol 85 (3) ◽  
pp. 237-242
Author(s):  
Arthur D. Brickman ◽  
Barton L. Jenks
Keyword(s):  
Dynamic Analysis ◽  
Mechanical Vibration ◽  
Coupled System ◽  
Plane Motion ◽  
Gravity Center ◽  
Center Configuration ◽  
Rotational Components ◽  
Mass Spring ◽  
Design Factors ◽  
Oscillatory Force

Many self-contained machines used in industry serve to generate a sustained mechanical vibration for performing such diverse operations as vibration testing, hammering, material conveying, impacting, and screening. A particular class of such machines having only plane motion is idealized as a dynamic “vibrator” consisting of a two-mass, spring-coupled system driven internally by an oscillatory force. A dynamic analysis of this system is presented to show that the steady-state motion has both translational and rotational components. Specific methods are given for predicting the resultant direction and amplitude of motion for any point in the vibrator system. Results of the dynamic analysis show quantitatively the effect of system resonance, mass distribution, gravity-center configuration, and internal damping on vibrator operation and these design factors are discussed in terms of typical vibrator applications.

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.

Dynamic Analysis of Plain Bearings in a Positive-Displacement Rotary Compressor

1987 ◽  
Vol 30 (3) ◽  
pp. 310-315
Author(s):  
Masahiro Kubo ◽  
Noritsugu Kawashima ◽  
Hitoshi Marumo
Keyword(s):  
Dynamic Analysis ◽  
Rotary Compressor ◽  
Positive Displacement

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.

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