Design Of Mechanical Equipment Research Articles

Innovative Design to Control Spartina Alterniflora

In order to effectively curb the rapid growth trend in Spartina alterniflora in coastal cities of China, this study proposes an innovative mechanical equipment design scheme for eradicating Spartina alterniflora. Based on literature analysis and field research, the AHP (analytic hierarchy process) model is constructed to quantify and prioritize the diverse needs of users for control equipment. Subsequently, the House of Quality (HOQ) in QFD (Quality Function Deployment) is used to analyze the key components and structure of the equipment to ensure its performance and feasibility in practical applications. Finally, combined with the Theory of Inventive Problem Solving (TRIZ), the potential problems encountered in the structural design of the equipment are analyzed, and the corresponding creative principles are applied to solve the contradictions and complete the optimal scheme design. This study, via the acquisition of user needs and further analysis of the machinery’s structure, proposes a scheme that can address many problems related to Spartina alterniflora in China and provide new technical ideas for the field of wetland environmental protection.

3D Modeling Simulation and Innovative Design of a Saw Cutting Mechanism for a Movable Buckling Machine

In this research, a sawing mechanism of a mobile buckling machine was innovatively designed for the forest resources and environmental characteristics of the northeast region of China. The northeast region of China is rich in forest resources, but the climate is cold, which puts high demands on the performance and adaptability of mechanical equipment. In this study, the three-dimensional modeling of the saw-cutting mechanism was completed by Pro/Engineer 5.0 modeling software, and an in-depth dynamics simulation analysis was carried out using dynamics simulation software. The study aims to assess the applicability of this saw-cutting mechanism in the northeast region of China, analyze its design characteristics, and explore possible directions for performance optimization. Through this study, we expect to provide valuable references for future technological innovations, as well as to promote the practical application and development of mobile buckling machines in cold regions. This research not only has regional characteristics, but also reflects the innovative idea of combining mechanical equipment design with environmental adaptability.

A synthesis method for epicyclic chains based on new topological model and similarity

The structural design is a prerequisite for the creation of mechanical equipment. This study focuses on the structural synthesis of epicyclic chains (ECs), and proposes a new topological model and synthesis method of ECs to address the existing research problems (i.e. synthesis dependence on multiple graphic transformations and the generation of pseudo-isomorphism). First, the structural characteristics of ECs are analyzed to explore the relation between their axles, gears, and planet carriers, and the corresponding topological model and the adjacency matrix expression of ECs are provided. Then, the topological elements corresponding to the axles, gears, and gear pairs are added sequentially to the topological graph corresponding to the planet carriers, and the constraints are established based on similarity to inhibit the generation of isomorphism. Finally, all the databases of feasible ECs are obtained through gear loop discrimination. All processes are carried out with computer assistance. The synthesis results of the ECs with 1–3 degrees of freedom and up to 10 components are presented. The logic of this paper is to simplify (or optimize) the synthesis process to improve efficiency of structural synthesis, which will break through the threshold of computing power and provide more possibilities for the design of mechanical equipment.

Development of equipment for carrying out torsion tests on AISI 4340 shaft

In the last 5 years, some companies in the midwest of Santa Catarina have started to apply different technologies in the manufacture of mechanical components, for example, friction welding of the shafts in the rotors of hydraulic pumps. To guarantee the quality of welded rotors, it is essential to test the mechanical assembly against the torsion test. The present study presents the development of the mechanical design of equipment to perform the torsion test, according to the specificity of local industrial applications. As results obtained, it was observed that the structure of the equipment is capable of resisting efforts during the torsion test. The secondary reducer gear shafts are robust against the torque calculated for fracture of the specimen according to ASTM A938. The gears designed for the external speed reducer also bear the stresses. The calculations carried out according to the bibliography indicated that the designed equipment has a maximum torque of 3500 Nm.

Wooclap for improving student achievement and motivation in the Chemical Engineering Degree

To improve the achievement and motivation of the students of the subject Mechanical Design of Equipment in the Chemical Engineering Degree, a teaching innovation project is carried out based on gamification and immediate feedback, specifically through the use of the Wooclap software. After the project design and implementation, it was evaluated using two main instruments: the institutional questionnaires of the own university and a specific questionnaire designed by the teaching team. The results suggested that the use of Wooclap in the classroom had a positive impact on students, allowing, on the one hand, to increase students’ motivation and, on the other hand, to improve their academic achievement. Likewise, the constructive comments from the students promoted the teaching team the opportunity to develop and deepen future changes and updates.

A Green Design Method for a Rust-Off Machine Based on QFDE and Function Analysis

Green design pursues maximum economic efficiency and minimum environmental impact. Green design of mechanical equipment can ensure environmentally friendly design and manufacturing. A rust-off machine is a crucial piece of equipment in remanufacturing. As attention to remanufacturing grows, the demand for rust-off machines is gradually increasing, but their green characteristics have not attracted attention. There is a need to carry out a green design for a rust-off machine that can improve its economy and environmental friendliness. In response to this need, in this study, a green design method for a rust-off machine was developed, combining the strengths of quality function deployment for environment (QFDE) and function analysis. In this method, functional analysis was used to determine the mapping relationship between functions and components. QFDE was used not only to determine the relationship between customer requirements and engineering metrics, but also to establish the relationship between engineering metrics and components and to obtain optimal structural solutions. A green design of a steel plate surface rust-off machine was taken as a case study. The results show that this method can achieve a win-win design that achieves maximum economic benefit and environmental protection.

Experimental and numerical studies on free vibration of CFRP laminate with cutout

Carbon fiber reinforced plastic (CFRP) laminate with cutout is a lightweight structure in mechanical equipment design. In this paper, experiments and numerical analysis are conducted to study the free vibration of the CFRP laminate with cutout. The damping loss factor (DLF) of one-layer CFRP laminate is calculated reversely for providing the reliable material properties. The effect of the cutout shape on the free vibration of the CFRP laminate with cutout is studied. Meanwhile, by taking the circle cutout for instance, the effect of the cutout size, location, and number on the free vibration of the CFRP laminate with cutout are investigated. The software ABAQUS is used to perform the numerical modal analysis of the CFRP laminate with cutout, and the natural frequencies of mode I to mode III are obtained. According to the damping strain energy model, the stress and strain components are extracted for calculating the DLF by program written in MATLAB. Using B&K vibration testing system, experiments are carried out for the validation of the numerical modal analysis results by applying “single-input single-output” (SISO) approach. In addition, the stiffness of the CFRP laminate with cutout is studied by numerical analysis and experiments. How the affecting factors affect the free vibration of the CFRP laminate with cutout is discussed, and the relationship between the DLF and stiffness is explored. This study provides a reference for the application of the CFRP laminate with cutout.

System Deformation Behavior of Friction Pair in Fretting Wear

AbstractSeveral criteria for fretting wear behavior evaluation have been established since the proposal and establishment of the fretting loop concept. In this article, system deformation and system deformation ratio were defined. In addition, the fretting running conditions were distinguished from the evolution of system deformation with fretting cycles during fretting wear tests under different applied displacements and loads. In the gross slip regime, the system deformation was independent of the applied displacement and increased as the load increased, whereas in the partial slip regime, the system deformation was independent of the load and increased with the applied displacement. Furthermore, a linear relationship between the system deformation and the applied load in gross slip regime was found for the first time. Based on this linear relationship, the system deformation ratio can forecast the running regime with a given load and displacement. For the titanium alloy fretting pairs studied in this article, the fretting wear was found to run in the gross slip regime if the system deformation ratio was smaller than 0.9. Based on these observations, the system deformation ratio exhibited applicability in assisting the mechanical design of equipment suffering from fretting wear.

Systematic analysis of rationalization of mechanical design in mechanical manufacturing process

The use of mechanical equipment instead of labor is the core link of the rapid development of modern industry, which can greatly improve the efficiency of manufacturing and effectively reduce the risk of manufacturing, but at present, there is less systematic research on the design of mechanical equipment, so it is difficult to rationalize the design of mechanical equipment from the aspect of mechanical manufacturing technology, which can easily lead to the reduction of the precision of mechanical equipment. In view of this, the paper studies the importance of the rational design of mechanical manufacturing, and studies the process flow of mechanical manufacturing. On this basis, the rational mechanical design based on mechanical manufacturing process is systematically analysed, and the rational mechanical design strategy is formulated provided theoretical support for the manufacture of machinery and equipment.

果蔬果皮拉伸力学性质与微观结构的研究

Fruit and vegetable peels exert a protective effect on fruits as constituent parts of the outermost tissue and their properties are of great importance to reducing fruit and vegetable mechanical injury. Four kinds of fruit and vegetable peels such as Nagafu apple, Crisp pear, Tainong mango and long eggplant were chosen to perform longitudinal and transverse tests of tensile property by means of electronic universal testing machine. Stress-strain curve, tensile strength, elastic modulus and fracture strain of peels were obtained; and the microstructures of four kinds of peels were scanned using an electron microscope (SEM). The results indicated that cubic polynomials proved superior for quantifying the stress-strain non-linear relationship of peels and the fitting error of tensile strength is less than 10 parts per thousand. Tensile strength, elastic modulus and fracture strain of peels were different in the case of different fruits and vegetables cultivated and different parts of the same peel; fruit and vegetable peels belong to anisotropic heterogeneous materials and have certain strength. The mean values of tensile strength and fracture strain of the long eggplant peel are the biggest in four kinds of peels and that of elastic modulus of Nagafu apple peel is the largest; long eggplant and Nagafu apple peels had better resistance to damage sensibility than Crisp pear peel. The bearing capacity of the peels depends on the number, width and distribution of microcracks on the surface, and the shape of the epidermal cells and fruit dot on peels; the number of microcracks is bigger and the width of microcracks is wider, the tensile strength is smaller and the elastic modulus of peel is bigger with the slippage increase of epidermis cells. This study provides basic technical parameters for mechanical equipment design for fruit and vegetable during harvesting, processing, packaging, storing and transporting and builds the correlations between macro-mechanics properties and microstructures of fruit and vegetable peels.

The Lightweight Design and Simulation of Hydraulic Steel Gate with Metal Sandwich Construction

The paper applies composite technology into the field of hydraulic metal structures and hydropower construction mechanical equipment design, and presents the method of optimum design of hydraulic steel gate metal sandwich construction and simulation analysis. According to characteristics of the structure of the flat hydraulic steel gate and selecting the appropriate metal sandwich construction, this paper optimize the design of a hydraulic steel gate of metal sandwich construction from the perspective of light-weight purpose of structure. Considering the overall mechanical behavior of steel gate structures and using technology of three-dimensional modeling and numerical simulation, this paper has a numerical simulation analysis on the optimum hydraulic steel gate. Numerical simulation analysis and theoretical calculation results show the optimum structure of hydraulic steel gate is reasonably practicable.

Common Problem Analysis in Electromechanical Equipments of Highway External Field

Electromechanical system is the main auxiliary system for expressway traffic facilities and the main tool to implement modern management. In this paper electrical safety performance and environmental adaptation performance were introduced first. Then highway external field electromechanical equipments were recommended. This may give some references to electrical and mechanical equipment design, production and construction.

Digital Testing Methods of Virtual Prototype and Applied Research Facing to Product

There are many limitations depend on traditional physical product testing methods. Firstly, the cost is high and adaptability is poor. Secondly, the test is lag and it can’t follow the new product design’s beat. Thirdly, it can’t converge with digital design method, and it difficult to meet with the requirement of industry information. Study a product’s digital test method which based on modern design technical, and discuss simulation testing technical come true which face to virtual prototyping of bag filter, and aiming at digital testing result of bag filter main working capability prove feasibility and effectiveness of this method. Firstly, analyses components of digital virtual testing system and theory of working, and provide design model of virtual prototyping testing and testing progress how to come true, and by changing the condition of working simulation, and sampling, and data processing, acquire the result of dust gas uniformity which is design prototyping of bag filter. Application prove that digital process, face to digital testing of product virtual prototyping, by testing object and testing instrument and testing progress, and so on, adopting model simulation, digital simulation, calculate experiment, simulate testing technical, complete prototyping testing working under fully virtual state in computer. Let prototyping design quality controlling which is based on quantizing move forward. Achieve parallel designing and testing, which is full with the zero-cost, zero-lag, zero error of large and complex mechanical equipment design testing.

The Research of Humanized Design of Mechanical Equipment

The requirements of modern industrial mechanical equipment not only stay in the realization of its basic functions, but pay more attention to issues of the humanized design involved in product design. During the design process of mechanical equipment, the pursuit of rational functions, the full consideration to human needs, the formation of efficient human-machine communication, and the improving of the product quality are the significances of the humanized design. Therefore, the studying of the humanized design of mechanical equipment not only has its theoretical significance, but also has very important practical significance. The application of humanized design concept in mechanical product design is analyzed and researched in this paper. It is necessarily demonstrated humanization design concept applied to mechanical equipment product design from mechanical equipment safety, easy operation, form, color, mechanical equipment operator mental model five aspects.

Optimal control of biodiesel production in a batch reactor: Part II: Stochastic control

The determination of time-varying profiles through dynamic optimization is an exclusive characteristic of optimal control problems; however, these types of problems become more challenging when variability and uncertainty in any parameter is included. In biodiesel production, there are inherent uncertainties arising due to variation in initial composition, operating parameters, and mechanical equipment design that can have a significant impact on the product quantity, quality and process economics. Thus, one of the most influential uncertainties in this process is the feed composition since the percentage and type of triglycerides in biodiesel composition varies considerable. In this work, the optimal control for biodiesel production in a batch reactor developed in Part 1 is extended to a problem when uncertainty in the feed composition is considerably. Under control of reactor temperature, we applied a numerical method, based on the Steepest Ascent of Hamiltonian to solve the stochastic optimal control problem that involved the application of Ito processes and the stochastic maximum principle. It has been found that the temperature profile obtained using deterministic optimal control is robust in the face of feed composition uncertainties also.

The Granulation Technique of Rice Straw and its Mechanical Equipment Design

As a large agricultural country, rice straw is a kind of inexhaustible and renewable resources in China. Since the rice straw is viscoelastic biological material with low density, it is not conducive to the transport and storage, and it affects the deep processing or secondary development and utilization. Due to the high compression ratio, on the other hand, straw densification briquetteing fuel (SDBF) is great convenience to transport and storage. Simultaneously, it improves the combustion properties of biomass fuels, and increases the efficiency in the use of biomass resources. It has an expansively developing prospects. Accordingly, how to effectively convert the loose rice straw into SDBF is gaining more and more attentions now. In this article, by researching the characteristics of the compressed rice straw fiber, biomass formation mechanism and its influence on shaping factors, the better conditions in processing of rice straw compression molding are concluded. Based on biomass compression molding technology, a kind of flat compression granulating machine was subsequently designed. And then we have designed compressed granulation molding trials on straw with different particle size and different pressures. Experimental results show that the granulation machinery can effectively reduce energy consumption, abrasion of equipment, and raise the productivity.

Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating sensor

This paper introduces fiber Bragg grating (FBG) based on a fiber optic grating sensor developed to be embedded on mechanical equipment for digital monitoring and health diagnosis. The theoretical and experimental researches on the new-style FBG sensor (FBGS) technology, high-speed demodulation, and data transmission are discussed. The transmission characteristics between the FBG and the detection interface, modeling and compensation method for online distributed multi-parameter digital monitoring and methods for data processing, synchronous sampling, and long-term dynamic digital monitoring using embedded technology are also presented. The acquired information by an FBGS can be used for the optimization of maintenance schedules and refinement of mechanical equipment design. It is a challenge to gather real-time data from components working at high speed and in a severe environment of high temperature, high pressure, and high rotation speed. Currently, there are no sensors or technologies available for digital monitoring and health diagnosis under this rigorous situation for use in mechanical engineering operation safety. As a result, this paper introduces an online distributed and integrated digital monitoring system and health diagnosis. The new principle and new method will contribute to modern measurements in science and technology, mechanical engineering, and large mechanical equipment operation safety.

Mechanical Equipment Design for Simplicity

Mechanical product design can be greatly enhanced by following the principles of design for simplicity (DFS). Properly applied, DFS results in lower material cost, fewer mechanical parts and drawings, fewer suppliers, less inventory and storage space, and substantially easier assembly. This yields higher-reliability products at lower cost with more value to our customers. Field service personnel and customers also find that these products are much easier to use and that they get to the market sooner. DFS employs multifunctional teams early in the product realization process. Following straightforward design and assembly practices and drawing on their diverse backgrounds, these teams use brainstorming and concurrent engineering techniques to create the desired product design. Telephones with 50 percent fewer parts, minicomputers and printers with 40 percent fewer parts, and complete digital PBX systems with 25 percent fewer parts are typical results. The process is powerful, the results are impressive, and the future is bright! Once a design team has employed the process, its members often refuse to accept products that were developed without it.

The design of mechanical equipment for the limitation of in-service failure

Mechanical equipment design demands a deep understanding of the inherent failure mechanisms likely to be encountered in service operation. Such understanding can result in the eradication or the limitation of the effects of in-service failures. This aspect of engineering design is examined and a case study example, in which the design of stand-by equipment involved the limitation of fretting corrosion, is used as an illustration of the general principles involved.

A Rod Pumping System To Reduce Lifting Costs

Rising costs of artificial lift operations are a continuing concern to oil producers in maintaining efficient and profitable performance. A new long-stroke sucker rod pumping system has been developed to minimize the impact of these rising costs. This new system results from a broad development project based on system design considerations having major influence on overall cost effectiveness of the system. The basis of these evaluations is discussed, resulting equipment design is described, and field operating results are presented. Performance results to date confirm achievement of reduced overall operating costs as a result of the performance characteristics of this system.