Recent Patents on Mechanical Engineering - Volume 15, Issue 5, 2022

Background: Tooth surface wear is inevitable in helical geared transmission. Consequently, the worn profile deviates from the ideal involute one. As a result, the structural stiffness of worn tooth and contact stiffness of tooth-pair are both changed. Methods: This work presents an improved calculation method for structural stiffness of worn teeth by combining slicing and potential energy method, considering non-uniform dist Read More

Background: When driving and working, the engine, working equipment and uneven road surface will cause severe vibrations to the wheeled excavator, which can affect efficiency and comfort. This paper discusses various patents and presents a new method of vibration reduction for excavators. Objective: The research aims to design the excavator's counterweight as a tuned mass damper (TMD) to reduce body vibrat Read More

Background: Among the metals used in foundry, we find the austenitic stainless steels, which are used in several fields because of their mechanical properties, which can change during the heat treatments; for that, it is important to understand and control the growth of the austenite grains. Objective: Modeling austenite grain growth by considering the effects of heating temperature, holding time, and initial austenite grain siz Read More

Objective: In order to further study the characteristics of flow parameters in the wellbore during solid fluidization drilling, based on the physical model of solid fluidization exploration of hydrate reservoir, a gas-liquid-solid three-phase flow model is established during the drilling process. Methods: The parameter changes of wellbore pressure, section gas holdup, liquid volume fraction, temperature and wellbore hydrate d Read More

Background: With the rapid development of the power system, oil-immersed transformers are widely used in the substation and distribution system. The faults of oil-immersed transformers are a large threat to the power system. Therefore, it is significant that the faults of oil-immersed transformers can be diagnosed accurately. Objective: To accurately diagnose the faults of oil-immersed transformers through machine l Read More

Background: In response to the current need for the development of large-scale wheat combine harvesters, this paper carried out the structural design and performance test of a large feed volume wheeled wheat combine harvester. Methods: Based on the characteristics of wheat plants, this paper designed a wheeled wheat combine harvester with a feed rate of 10kg/s. Subsequently, the structural parameters and design pro Read More

Background: Technological progress is based on the development of different types of materials. Among the materials most solicited, we mention metals and alloys. The development of these materials has been initiated and resulted in a wide range of metallic materials, including austenitic manganese, constituting, until today, a center of interest for various research works given their wide use in the industry as well as the re Read More