Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

Brumerčík, František; Lukac, Michal; Caban, Jacek; Krzysiak, Zbigniew; Głowacz, Adam

doi:10.3390/app10041417

Cited by 25 publications

(15 citation statements)

References 38 publications

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“…Materials intended for vacuum casting are the most often two-component polyurethanes with different properties, which allows to achieve properties similar to rubber, polypropylene, ABS plastic, or polycarbonate. If one uses the plastics with good sliding properties, it is also possible to produce complicated components of small dimensions, such as gears [7,9].…”

Section: Verification Of the Thermal Expansion Effect Of Silicone Mouldsmentioning

confidence: 99%

Verification of the Thermal Expansion Effect of Silicone Molds Intended for Production of the Prototype Components Using Vacuum Casting Technology

Spišák¹,

Sásik²,

Šteininger³

et al. 2022

Komunikácie

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The article deals with vacuum casting technology and especially with the assessment of the influence of the tempering temperature of silicone molds on the dimensions of future castings. The aim was to evaluate the actual size of the castings, using different tempering temperatures of the molds and different casting materials. After examining the resulting dimensions of the individual castings, a procedure was established by which these effects could be minimized. In the end, a test of the proposed procedure is performed, which confirmed its correctness.

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Section: Verification Of the Thermal Expansion Effect Of Silicone Mouldsmentioning

confidence: 99%

Verification of the Thermal Expansion Effect of Silicone Molds Intended for Production of the Prototype Components Using Vacuum Casting Technology

Spišák¹,

Sásik²,

Šteininger³

et al. 2022

Komunikácie

View full text Add to dashboard Cite

show abstract

“…Computational simulation can help resolve the above challenges with considerable advantages to the level of insight and development time. The approaches used for modeling (gas) injectors can be divided into several categories depending on the level of physics involved and methods incorporated: physical zero-, single-, or multidimensional [ 4 , 31 , 32 ]; analytical [ 33 , 34 , 35 ]; empirical [ 36 , 37 , 38 ]; Finite Element Method (FEM) in the mechanical part [ 30 , 39 , 40 ]; FEM in the electrical part [ 41 , 42 ]; Computational Fluid Dynamics (CFD) in the flow part [ 43 , 44 , 45 ]. …”

Section: Introductionmentioning

confidence: 99%

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

Szpica

Kusznier

2021

Sensors

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The article presents a model-based evaluation of the impact of the plunger stroke on functional parameters of the low-pressure pulse gas solenoid injector. A reduced-order physics-based mathematical model was used to achieve this goal. The model was built on the basis of specified simplifications of the process, considering the forces that cause the plunger to move and the forces constituting resistance to its displacement. The implementation of a mathematical description in to the Matlab-Simulink environment allowed one to determine the characteristic values of operation of the Valtek Rail Type-30 injector, including plunger displacement courses. Calculations made with the assumption of the factory plunger stroke confirmed the validity of the model. The differences in opening and closing times were below 3% in comparison to the values given in the objects technical information. By assuming a specific plunger stroke, the functional relationships of opening and closing times were determined. The results showed a distortion of the force–response dependence for different plunger strokes. Results presented in the article can be used to support control-oriented modeling of systems incorporating pulsed gas dosing devices, such as combustion engines or gas turbines. More specifically, the proposed method can be used to pre-calibrate the delay time of the injector operation.

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“…Gearboxes are one of the most fundamental and crucial components in a wide range of mechanical systems, such as automobiles, ships, aircrafts, turbines, and so on [1,2]. The gear vibration is regarded as one of the main factors affecting the operating performance of the system.…”

Section: Introductionmentioning

confidence: 99%

Signal Identification of Gear Vibration in Engine-Gearbox Systems Based on Auto-Regression and Optimized Resonance-Based Signal Sparse Decomposition

Huang

Tong

et al. 2021

Sensors

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As an essential part of the transmission system, gearboxes are considered as a major source of vibration. Signal identification of gear vibration is necessary for online monitoring of the mechanical systems. However, in engine-gearbox systems, the ignition impact of the engine is strong, so that the gear vibration is generally submerged. To overcome this issue, the resonance-based signal sparse decomposition (RSSD) method is used in this paper based on different oscillatory behaviors of the gear meshing impact and the engine ignition impact. To improve the accuracy of RSSD under interferences, the meshing frequency energy ratio (MF–ER) index is introduced into RSSD to adaptively choose the decomposition parameters. Before applying the RSSD method, the auto-regression (AR) model is used as a pre-whitening step to eliminate the normal gear meshing vibration, which improves the decomposition performance of RSSD. The effectiveness of the proposed AR-ORSSD (AR-based optimized RSSD) algorithm is tested using both simulated signals and measured vibration signals from an engine-gearbox system in a forklift. Comparisons were made with the RSSD algorithm based on a genetic algorithm. Experimental results indicate that the AR-ORSSD algorithm is superior at identifying gear vibration signals especially when under strong interferences.

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Comparison of Selected Parameters of a Planetary Gearbox with Involute and Convex–Concave Teeth Flank Profiles

Cited by 25 publications

References 38 publications

Verification of the Thermal Expansion Effect of Silicone Molds Intended for Production of the Prototype Components Using Vacuum Casting Technology

Verification of the Thermal Expansion Effect of Silicone Molds Intended for Production of the Prototype Components Using Vacuum Casting Technology

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

Signal Identification of Gear Vibration in Engine-Gearbox Systems Based on Auto-Regression and Optimized Resonance-Based Signal Sparse Decomposition

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