Elastodynamic analysis of a gear pump. Part II: Meshing phenomena and simulation results

Mucchi, Emiliano; Dalpiaz, Giorgio; Rivola, Alessandro

doi:10.1016/j.ymssp.2010.02.004

Cited by 51 publications

(28 citation statements)

References 25 publications

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“…Coupling through gear body deformations is also given a special attention, due to the multiple meshes per wheel. With respect to the contact point location and geometric overlap modeling approach used in this work, it has been conceived to allow for the almost direct inclusion of additional modeling features, such as tooth profile modifications (with an approach used in [22]) or the use of shifted gears.…”

Section: Abstract Planetary Transmission á Meshing Stiffness á Transmmentioning

confidence: 99%

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

et al. 2015

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This paper presents a planar spur gear planetary transmission model, describing in great detail aspects such as the geometric definition of geometric overlaps and the contact forces calculation, thus facilitating the reproducibility of results by fellow researchers. The planetary model is based on a mesh model already used by the authors in the study of external gear ordinary transmissions. The model has been improved and extended to allow for the internal meshing simulation, taking into consideration three possible contact scenarios: involute-involute contact, and two types of involute-tip rounding arc contact. The 6 degrees of freedom system solved for a single couple of gears has been expanded to 6 ? 3n degrees of freedom for a planetary transmission with n planets. Furthermore, the coupling of deformations through the gear bodies' flexibility has been also implemented and assessed. A step-by-step integration of the planetary is presented, using two typical configurations, demonstrating the model capability for transmission simulation of a planetary with distinct pressure angles on each mesh. The model is also put to the test with the simulation of the transmission error of a real transmission system, including the effect of different levels of external torque. The model is assessed by means of quasi-static analyses, and the meshing stiffness values are compared with those provided by the literature.

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Section: Abstract Planetary Transmission á Meshing Stiffness á Transmmentioning

confidence: 99%

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

et al. 2015

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“…The face width B is variable, the modulus m n ¼ 2, the pressure angle ¼ 28 and the number of teeth Z ¼ 7 in this section. Equation (17) can be simplified where…”

Section: The Performance Parameters Of Gear Pump Theoretical Displacementioning

confidence: 99%

Design and performance analysis of a circular-arc gear pump operating at high pressure and high speed

Zhou

Hao

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

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This paper presents a high-pressure and high-speed gear pump for aerospace application and introduces a circular-arc tooth profile that has no trapping feature and whose gears are in continuous one-point contact in the plane of rotation. Basic dimensions are determined and performance parameters of the gear pump are obtained by structural design of the gear pump. The performance parameters are discussed for different tooth profiles. A disc tool and hob are designed to generate the circular-arc tooth profile. A computer-aided design (CAD) system for the design of the circular-arc gear pump is developed with features of tooth profile design, tool design, and numerical control. The test gears were processed to verify the correctness of CAD system. A study of the outlet pressure of the circular-arc gear pump reveals that the developed high-pressure and high-speed gear pump has low outlet pressure fluctuations.

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“…One is the periodic variation of the pressure distribution on the gears, due to the fluid flows from the low to the high pressure chamber. The other is the periodic variation of gear meshing force [5] [6]. It has been found that the fluid-borne noises are the main contributors to the noise level of an external gear pump, which needs further research in engineering.…”

Section: Introductionmentioning

confidence: 99%

Noise Simulation Analysis of a Variable Displacement External Gear Pump and Unloading Groove Optimization

Yongkang¹,

Li²,

Yang³

2018

OALib

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The oil pump is an important part of vehicle engine, whose noise and vibration characteristics affect the engine performance significantly. The noises generated by both the pressure and flow fluctuations are the main contributors to the oil pump noise. In this paper, noise analysis of an external gear pump is carried out by using the computational fluid dynamics (CFD) method and The Lighthill's acoustic analogy (LAA) algorithm. The fluid pressure and velocity distributions of the flowfield are firstly calculated by using a CFD model. The noises generated by flowfield are simulated and their sound pressure spectra are obtained by using an LAA-based finite element model. By analyzing the phenomenon of oil trapping, the optimum design of unloading groove is put forward, and then the simulation analysis is carried out. According to the finite element model, the noise level of gear pump is reduced and the effect of noise reduction is achieved. The technique presented in this paper can be regarded as a useful tool for optimization design of gear pumps in vehicle engineering.

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Elastodynamic analysis of a gear pump. Part II: Meshing phenomena and simulation results

Cited by 51 publications

References 25 publications

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

Advanced model for the calculation of meshing forces in spur gear planetary transmissions

Design and performance analysis of a circular-arc gear pump operating at high pressure and high speed

Noise Simulation Analysis of a Variable Displacement External Gear Pump and Unloading Groove Optimization

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