Recent Patents on Mechanical Engineering - Volume 15, Issue 4, 2022

Background: In the industrial manufacturing process, manually labeling enough datasets is time-consuming, which hinders the training and deployment of defect detection models. Therefore, automatic defect detection and its classification is the premise of industrial production quality. Objectives: The study mainly discusses about the detection of the Hemispherical Surface of the valve core by machine vision method. M Read More

Background: The essence of the plastic deformation of the material to be processed during the cutting process is the movement of dislocations. By increasing the density of dislocations, the material’s flow stress inevitably increases by raising the strain rate. Objectives: The three regions are divided quantitatively as thermal activation stage (101-3×103), nonthermal stage (10-3-101), and dislocation damping stage (above 3×1 Read More

Background: To obtain the load characteristics and fatigue characteristics of the engine bracket during the working process, the automobile engine bracket is taken as the research object, and the force characteristics are analyzed. Objective: This paper provides a theoretical basis for engine bracket design that improves the reliability and durability of the engine bracket. Methods: Under cyclic loading, the fatigue characteristic Read More

Background: In order to reduce global carbon emissions, a cross-critical CO2 singlemachine two-stage compression system was proposed. Due to the characteristics of cooling on the high-pressure side of the cross-critical cycle and bipolar compression on the single-stage, the discharge pressure and the high-low pressure volume ratio have a great influence on its heating performance. Objective: The purpose of this pape Read More

Background: Gearboxes are used in many industrial fields. Due to uncontrollable external factors and inevitable fatigue damage, gearboxes are likely to fail. It has become a major research trend to collect dynamic signals of gearboxes and develop effective fault diagnosis methods for gearboxes. Objective: The purpose of this paper is to study the dynamic characteristics of herringbone gear transmission (HGT) under di Read More

Background: Scroll refrigeration compressors are the critical equipment for the refrigeration system in air conditioners and vehicles. The asymmetric suction structure can be applied to reduce the scroll compressors' size. However, the pressure difference between the symmetric working chambers becomes larger and leads to the special force characteristics of the orbiting scroll. Objective: This paper illustrates th Read More

Aims: An inverted XY-3-RPS hybrid mechanism was designed to apply ultraviolet-induced nano-particle colloid jet machining to polish the complex surface. Background: The hybrid mechanism has been widely used in the ultra-precision polishing field for installing different polishing tools on the moving platform to meet different machining requirements because of its wide working space, good dynamic performance and large be Read More

Background: With the continuous exploitation of shallow mineral resources, the shallow resources are increasingly exhausted. Therefore, the application of multi-rope friction machine in ultradeep, high speed, heavy load mine will be more widely used. The diameter and dead weight of the hoisting-rope in this heavy-duty deep well are larger, and the internal torsion and bending load are more complex, which makes the repl Read More

Objective: To efficiently exploit the hydrate reservoir, based on the problem of a large amount of sand production in the current hydrate reservoir exploration process, combined with the solid fluidization well testing and production method. Methods: A gas-liquid-solid three-phase flow model is established and hydrate decomposition is taken into consideration. The changes in parameters of wellbore pressure, gas volume fractio Read More