Abstract
Especially, with the advancement of technology, mechanical parts need to be designed to be lighter and more durable. In the industry, gears are the most common power transmission equipment, and for this equipment, increasing durability and rigidity has an essential importance. During power transmission, undesired vibration and noise arise in gear systems. In addition to gear design, gearbox housing design is also essential to reduce the radiation of undesired structure-borne noise and vibration. In order to reduce noise and vibration levels, some modifications are frequently used on gearbox housings. In this study, three different gearbox housing designs (basic, cross and cellular) are formed and analysed by using ANSYS® software. The design alternatives for housings have been formed inside of the structure as different quantities of longitudinal and transverse stiffeners. In addition, all the external dimensions and the mass of these three housing designs are equal in order to observe just vibration and noise reduction. Fast Fourier Transform (FFT), statistical properties of vibration signals and sound levels of the gearbox have used for comparisons to determine which gearbox have better vibration and sound levels.
Highlights
Gearboxes are one of the most commonly used mechanical power transmission systems in the industry
The vibration signals acquired from accelerometer and pulse signals acquired from the inductive sensor were sampled at 10 kHz and stored on a computer
The raw vibration data was acquired for 60 second that is equal to 1500 pinion gear rotation and 607 wheel gear rotation, owing to gear ratio
Summary
Gearboxes are one of the most commonly used mechanical power transmission systems in the industry. Structural analysis programs such as SolidWorks® and ANSYS® are often demanded and used extensively in the pre-production stage for design and analysis. These programs provide a decrease in time and effort needed for a better quality of production. The aim of all these studies is to contribute to the production of better-quality mechanical equipment with low vibration and noise level during operation. Aims of this research can be summarized as reducing the vibration and noise levels without increasing the mass, analysing effects of the inner stiffeners on housing designs, and identifying the natural frequency influence on vibration levels
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