Research Regarding Adaptive Design of Gear Pumps Used for Polymeric Products Engineering

2015 ◽  
Vol 760 ◽  
pp. 601-606
Author(s):  
Constantin Gheorghe OPRAN ◽  
Mircea Pricop ◽  
Constantin Teodoru
Keyword(s):  
Numerical Simulation ◽  
Adaptive Design ◽  
Design Feature ◽  
Gear Pump ◽  
Competitive Advantages ◽  
Molding Machine ◽  
Technological Parameters ◽  
Manufacturing Costs ◽  
Innovative Design ◽  
Gear Pumps

This paper present the results of the researches regarding innovative and adaptive design of gear pumps for engineering of polymeric products with application in production of injection molding machine. It shows the description of gear pump with innovative design and double gear pump – innovative design, highlighting innovative design feature through constructive adaptation depending on requirements, having (30 – 40) % smaller at the axial size, compared to the classic pumps. They highlight the competitive advantages of innovative pumps with superior technological parameters. The paper also shows numerical simulation of technological parameters for pumps in innovative and adaptive variant proving the correctness and the advantages of new variants. Using the innovative variant allows the development a family of gear pumps, single and double, extremely compact, robust, reliable and with low manufacturing costs.

Innovative Design of Polymeric Systems Used in Manufacturing of Gear Pumps

2015 ◽  
Vol 760 ◽  
pp. 607-612
Author(s):  
Constantin Gheorghe OPRAN ◽  
Mircea Pricop ◽  
Constantin Teodoru
Keyword(s):  
Numerical Analysis ◽  
Injection Molding ◽  
Gear Pump ◽  
Competitive Advantages ◽  
Innovative Design ◽  
Polymeric Systems ◽  
Special Construction ◽  
Special Profile ◽  
Innovative Solution ◽  
Gear Pumps

This paper present the results of the researches regarding innovative design of polymeric systems used in manufacturing of gear pumps with application to reversible pumps used both as pumps as well as motors or steps of the flow dividers. It shows the description of reversible gear pump, with compensating seal in the innovative variant and compensation sealing system for reversible pumps – innovative design. For this innovative solution has been developed a system of compensation sealing kit for reversible pumps – innovative design. In order to obtain these products was necessary to make molds for vulcanization and injection molding tools for polymeric products having special construction considering the size and special profile products. They highlight the competitive advantages of innovative compensation sealing system made by polymeric products. The paper also shows numerical analysis of the fluid at gear pumps using innovative compensation sealing proving the correctness and the advantages of new variants of sealing. The performances reversible pump that uses innovative new sealing system are homogeneous and high levels of performance than those with seals in the classic system.

Modelling and numerical simulation of thick sheet double slitting process using continuum damage mechanics

2014 ◽  
Vol 23 (8) ◽  
pp. 1150-1167 ◽  
Author(s):  
Yosr Ghozzi ◽  
Carl Labergere ◽  
Khemais Saanouni ◽  
Anthony Parrico
Keyword(s):  
Numerical Simulation ◽  
Constitutive Equations ◽  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Thick Sheet ◽  
Technological Parameters ◽  
Strongly Coupled ◽  
Mixed Hardening ◽  
Elasto Plasticity ◽  
Fully Coupled

This work concerns the modelling and numerical simulation of specific thick sheet cutting process using advanced constitutive equations accounting for elasto-plasticity with mixed hardening fully coupled with isotropic ductile damage. First, the complex kinematics of the different tools is modelled with specific boundary conditions. Second, the fully and strongly coupled constitutive equations are summarized and the associated numerical aspects are shortly presented. An inverse material identification procedure is used to determine the convenient values of the material parameters. Finally, the double slitting process is numerically simulated and the influence of the main technological parameters studied focusing on the cutting forces.

Computer Prediction of Cyclic Excitation Sources for an External Gear Pump

1985 ◽  
Vol 199 (3) ◽  
pp. 175-180 ◽  
Author(s):  
K Foster ◽  
R Taylor ◽  
I M Bidhendi
Keyword(s):  
Computer Program ◽  
Gear Pump ◽  
Computer Prediction ◽  
Pressure Distributions ◽  
External Gear Pumps ◽  
Theoretical Predictions ◽  
Gear Pumps ◽  
External Gear Pump

A description is given of a computer program for investigating the performance of the external gear pumps under varying conditions with the special emphasis on the examination of pressure distributions within the pump, i.e. excitation forces for the vibration of the pump case and the variation in flow generated by the pump. Measurements are presented for the variation with time of tooth space pressure and the results are compared with the theoretical predictions from the computer program.

Experimental Investigation of Flowrate Irregularity in Rotary Gear Pumps

1992 ◽  
Author(s):  
G. Mimmi
Keyword(s):  
Experimental Investigation ◽  
Flow Rate ◽  
Experimental Tests ◽  
Periodic Variation ◽  
Experimental Results ◽  
Gear Pump ◽  
Gear Pumps ◽  
Hot Film ◽  
Instantaneous Flow Rate ◽  
External Gear Pump

Abstract In a previous paper the author proposed a method to reduce the periodic variation in flow rate for an external gear pump. To verify the experimental results, a series of experimental tests on a expressly realized gear pump, was carried out. The pump was equipped with relieving grooves milled into the side plates. The tests were done on a closed piping specifically realized and equipped for measuring the instantaneous flow rate of the fluid through a wedge-shaped hot film probe.

WHICH WILL WIN IN THE GEAR PUMP TECHNOLOGY

2013 ◽  
Vol 37 (1) ◽  
pp. 129-134 ◽  
Author(s):  
Hai-Lin Zhu ◽  
Jun Pan ◽  
Min Zou ◽  
Hong-Nen Wu ◽  
Xingpei Qin
Keyword(s):  
Working Life ◽  
Radial Pressure ◽  
Radial Force ◽  
Gear Pump ◽  
Ring Gear ◽  
Flow Pulsation ◽  
Gear Pumps ◽  
New Type ◽  
Flexible Ring ◽  
Short Working

There exist three major problems in current gear pumps. They are unbalanced radial force, big excessive flow pulsation and short working life. In order to solve the problems above, a new type of gear pump with flexible ring gear is introduced. Pumping action is achieved through meshing between a flexible ring gear and a rigid external gear. Thus radial pressure forces are hydraulically balanced and the volumetric displacement is doubled for the new pump.

A gear pump based on harmonic gear drive

2013 ◽  
Vol 227 (12) ◽  
pp. 2844-2848 ◽  
Author(s):  
Hai-Lin Zhu ◽  
Peng Ning ◽  
Min Zou ◽  
Xingpei Qin ◽  
Jun Pan
Keyword(s):  
Service Life ◽  
Fluid Pressure ◽  
Gear Pump ◽  
Flow Pulsation ◽  
Flow Ripple ◽  
Gear Drive ◽  
Mutual Engagement ◽  
Gear Pumps ◽  
New Type ◽  
Total Discharge

Aimed at solving the problems of radial fluid pressure imbalance, bigger flow ripple and shorter service life that exists in traditional gear pumps, a new type of gear pump based on the principle of harmonic gear drive is put forth, where the function for pumping fluid is achieved by mutual engagement between flexible gear and rigid gear. The structural composition, principle and features of the new gear pump are described in this article. The new pump has two higher pressure cavities arranged symmetrically, which counteracts the fluid pressure and the pump could work longer. Its displacement is two times that of the conventional gear pump and the total discharge is bigger. Flow pulsation, vibration and noise in the new pump are evidently diminished, which make the operation smooth. The new gear pump has superiority in performance and could guide the development in gear pump technology.

Modeling and CFD Analyses of Gear Pump in OpenFOAM

2019 ◽  
Author(s):  
G. Shoukat ◽  
Kamran Siddique ◽  
M. Sajid
Keyword(s):  
Power Flow ◽  
Experimental Studies ◽  
Research Area ◽  
Peak Performance ◽  
Gear Pump ◽  
Numerical Studies ◽  
Gear Pumps ◽  
Cfd Analyses ◽  
Dynamic Meshing ◽  
Pressure Output

Abstract Turbomachinery plays a key role in process and manufacturing industries. The interplay between power, flow rates and pressure output remain an interesting research area. To support specific processes in the industry, each pump or compressor must be fine-tuned for peak performance. As trend shifts from large organizations to entrepreneurial startups, spending significant costs on licensing of commercially available CFD softwares becomes unfeasible. This paper investigates the use of OpenFOAM – open source CFD package towards the analysis of gear pumps. The solution employs dynamic meshing and snappyHexMesh library in a single study. To validate the numerical model developed under OpenFoam’s environment, experimental studies were carried out. The pressure output of the pump was measured at four different RPMs — 200, 250, 300 and 400. An excellent agreement between experimental and numerical studies was seen at relatively higher RPMs. The numerical studies further explored the pulsating flow, recorded the variation between a constant maximum and minimum pressure value for each RPM. The variation in pressure was observed to increase at higher RPMs. The agreement between experimental and numerical findings established the utility of OpenFoam in investigating pump action.

Methodology for the Evaluation of Gear Pump Performance

2020 ◽  
Author(s):  
Logan T. Williams
Keyword(s):  
Empirical Data ◽  
Pressure Rise ◽  
Operating Conditions ◽  
Volumetric Efficiency ◽  
Fluid Viscosity ◽  
Gear Pump ◽  
Pump Performance ◽  
Pump Speed ◽  
Multiple Parameters ◽  
Gear Pumps

Abstract Currently, most performance curves of gear pumps present volumetric efficiency as a function of one or more operating conditions. However, the nature of gear pumps is that volumetric efficiency is dependent on pump speed, pump pressure rise, and fluid viscosity. This dependency on multiple parameters impedes direct comparisons between pumps tested at disparate operating conditions or on different testbeds. A new method has been developed that formulates the volumetric efficiency as a function of a single parameter that captures pump speed, pressure, and fluid viscosity. The characteristics of the pump is then captured by curve fitting two constants to empirical data. This method allows extrapolation of pump performance beyond empirical data and direct comparison of the volumetric efficiency curves of two pumps tested under disparate conditions within a single plot. This work describes the analytical derivation of the methodology and the empirical data used for validations. Additionally, several possible applications of this method are presented.

scholarly journals A Study on Noise Reduction of Gear Pumps of Wheel Loaders Based on the ICA Model

2019 ◽  
Vol 16 (6) ◽  
pp. 999 ◽  
Author(s):  
Panling Huang ◽  
Liang Xu ◽  
Chuan Luo ◽  
Jianchuan Zhang ◽  
Feng Chi ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Noise Reduction ◽  
Noise Level ◽  
Gear Pump ◽  
Noise Sources ◽  
Environmentally Sustainable ◽  
Gear Pumps ◽  
Mixed Noise ◽  
Wheel Loaders

In order to reduce the noise level of wheel loaders caused by gear pumps and realize environmentally sustainable development, the noise generation mechanism of a gear pump was studied, and the influence of flow pulsation and gear impact on noise was analyzed. In order to reduce the interference of other noise sources on the noise level of the gear pump, a noise test rig was established. The mixed noise signals obtained from the rig test were separated using the ICA model. The ICA model includes the following algorithms: The fast Fourier transform (FFT), independent component analysis (ICA) and inverse fast Fourier transform (IFFT). Some theories about the influence of the teeth number and teeth profile on noise were analyzed by theory and simulation. A noise reduction strategy was proposed by increasing the teeth numbers and modifying the teeth profile of the gear pump. The tests results showed that the noise values of the external and the driver’s ear of the wheel loader were reduced to 1 and 2.2 dB (A), respectively. This proves the effectiveness of the optimization scheme of gear pump noise reduction.

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