Gerotor pump with POM gears: Design, production technology, research

Stryczek, J.; Bednarczyk, S.; Biernacki, Krzysztof

doi:10.1016/j.acme.2013.12.008

Cited by 54 publications

(59 citation statements)

References 2 publications

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“…In addition, these parameters can be introduced in specialized free software, such as GeroLAB [17], which will calculate and provide the technical drawings in CAD format (see Figure 2). where Z is the number of teeth of the external gear and λ is the tooth profile height correction coefficient-a function of the eccentricity, the number of teeth, the arc radius of the outer gear tooth and the tip diameter of the internal gear-with recommended values going from 0.6 (larger S) to 0.8 (shorter S) [15]. …”

Section: Modeling the Trochoidal-gear Unitmentioning

confidence: 99%

“…where Z is the number of teeth of the external gear and λ is the tooth profile height correction coefficient-a function of the eccentricity, the number of teeth, the arc radius of the outer gear tooth and the tip diameter of the internal gear-with recommended values going from 0.6 (larger S) to 0.8 (shorter S) [15]. Finally, the theoretical outputs such as the theoretical torque T in [N·m/bar], theoretical power N in [W/bar·rpm], the tip velocity of the internal gear Vt in [m/s·rpm], and the theoretical radial load RL in [N/bar] can be estimated by using the following expressions:…”

Section: Designing the Trochoidal-gear Unitmentioning

confidence: 99%

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GeroMAG: In-House Prototype of an Innovative Sealed, Compact and Non-Shaft-Driven Gerotor Pump with Magnetically-Driving Outer Rotor

et al. 2017

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Abstract:The technology of gerotor pumps is progressing towards cutting-edge applications in emerging sectors, which are more demanding for pump performance. Moreover, recent environmental standards are heading towards leakage-free and noiseless hydraulic systems. Hence, in order to respond to these demands, this study, which will be referred to as the GeroMAG concept, aims to make a leap from the standard gerotor pump technology: a sealed, compact, non-shaft-driven gerotor pump with a magnetically-driving outer rotor. The GeroMAG pump is conceived as a variable-flow pump to accomplish a standard volumetric flow rate at low rotational speed with satisfactory volumetric efficiency. By following the authors' methodology based on a catalogue of best-practice rules, a custom trochoidal gear set is designed. Then, two main technological challenges are encountered: how to generate the rotational movement of the driving outer rotor and how to produce the guide of rotation of the gear set once there is no drive shaft. To confront them, a quiet magnet brushless motor powers the driving outer rotor through pole pieces placed in its external sideway and the rotational movement is guided by the inner edgewise pads carved on it. Subsequently, GeroMAG pump architecture, prototype, housing, methodology, materials and manufacture will be presented. As a principal conclusion, the GeroMAG proof of concept and pump prototype are feasible, which is corroborated by experimental results and performance indexes.

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Section: Modeling the Trochoidal-gear Unitmentioning

confidence: 99%

Section: Designing the Trochoidal-gear Unitmentioning

confidence: 99%

GeroMAG: In-House Prototype of an Innovative Sealed, Compact and Non-Shaft-Driven Gerotor Pump with Magnetically-Driving Outer Rotor

et al. 2017

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“…This is because POM has high mechanical strength and unique properties such as excellent abrasion resistance, low friction coefficient, fatigue resistance, noiseless performance, lightweight, oil-less conditions, mouldability, higher melting point and low cost [1][2][3][4][5][6][7][8][9][10]. As such POM is considered as a major class of tribopolymers widely used in wear applications.…”

Section: Introductionmentioning

confidence: 99%

Wear Characterizations of Polyoxymethylene (POM) Reinforced with Carbon Nanotubes (POM/CNTs) Using the Paraffin Oil Dispersion Technique

Yousef

Visco

Galtieri

et al. 2015

JOM

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“…where λ is the tooth profile height correction coefficient-function of the eccentricity, the number of teeth, the arc radius of the outer gear tooth, and the tip diameter of the inner gear-with recommended values going from 0.6 (larger S) to 0.8 (shorter S) [23]. …”

Section: Model Of the Mini Trochoidal-gear Unitmentioning

confidence: 99%

“…The work presented by Stryczek et al [23] was undoubtedly a step forward in the gerotor pump technology manufacturing a polyoxymethylene (POM) trochoidal-gear set and researching by means of a computational model how the stress and deformations are influenced by the design factors. Another remarkable work has been carried out by Mancini et al [24] with their study of polyphthalamide/glass-fiber and polyphthalamide/glass-fiber/polytetrafluoroethylene-based composites as substitutes for aluminum and steel, respectively, in the production of motorcycle oil gerotor pump parts (housing, shaft/inner, and outer gear).…”

Section: Introductionmentioning

confidence: 99%

Magnet-Sleeve-Sealed Mini Trochoidal-Gear Pump Prototype with Polymer Composite Gear

et al. 2017

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Abstract:The trochoidal-gear technology has been growing in groundbreaking fields. Forthcoming applications are demanding to this technology a step forward in the conceiving stage of positive displacement machines. The compendium of the qualities and the inherent characteristics of trochoidal-gear technology, especially towards the gerotor pump, together with scale/size factor and magnetic-driven transmission has led to the idea of a magnet-sleeve-sealed variable flow mini trochoidal-gear pump. From its original concept, to the last phase of the design development, the proof of concept, this new product will intend to overcome problems such as noise, vibration, maintenance, materials, and dimensions. The paper aims to show the technological path followed from the concept, design, and model, to the manufacture of the first prototype, where the theoretical and numerical approaches are not always directly reflected in the prototype performance results. Early in the design process, from a standard-commercial sintered metal mini trochoidal-gear unit, fundamental characteristics and dimensional limitations have been evaluated becoming the strategic parameters that led to its configuration. The main technical challenge to confront is being sealed with non-exterior driveshaft, ensuring that the whole interior is filled and wetted with working fluid and helping the hydrodynamic film formation, the pumping effect, and the heat dissipation. Subsequently, the mini pump architecture, embodiment, methodology, materials, and manufacture are presented. The trend of applications of polymer composite materials and their benefits wanted to be examined with this new mini pump prototype, and a pure polyoxymethylene mini trochoidal-gear set has been designed and manufactured. Finally, both the sintered and the polymer trochoidal-gear units have been experimentally tested in an in-house full-instrumented mini test bench. Although the main goal of the presented work is the development of a new mini trochoidal-gear pump prototype rather than a numerical study, the results have been compared with numerical simulation. Subsequently, the prototype of the mini trochoidal-gear pump is a feasible proof of concept supported by functional indexes and the experimental results.

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Gerotor pump with POM gears: Design, production technology, research

Cited by 54 publications

References 2 publications

GeroMAG: In-House Prototype of an Innovative Sealed, Compact and Non-Shaft-Driven Gerotor Pump with Magnetically-Driving Outer Rotor

GeroMAG: In-House Prototype of an Innovative Sealed, Compact and Non-Shaft-Driven Gerotor Pump with Magnetically-Driving Outer Rotor

Wear Characterizations of Polyoxymethylene (POM) Reinforced with Carbon Nanotubes (POM/CNTs) Using the Paraffin Oil Dispersion Technique

Magnet-Sleeve-Sealed Mini Trochoidal-Gear Pump Prototype with Polymer Composite Gear

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