Blade wrap angle is one of the main parameters of centrifugal pump, which has an important influence on the internal flow characteristic and pump performance. In this work, five impeller models with different blade wrap angles (85°, 95°, 105°, 115°, and 125°) are established on the condition of other impeller parameters remain unchanged, whose external characteristic, internal flow, and wear were analyzed by numerical simulation method. The results show that the influence of blade wrap angle on efficiency is more significant than head, has a certain effect on the internal flow field of the centrifugal pumps and effects the wear position of pressure surface. With the increasing of blade wrap angle, the pump efficiency increases companied by the pump head decreases slightly, the area of higher speed at the outlet of the impeller tends to decrease, the higher speed wake area at the end of the blade pressure surface breaks and shrinks, the vortex in the impeller passage is fewer and smaller, the turbulent kinetic energy and morphology of vortex inside the pump decreases gradually, and the wear rate of the flow passage components shows a pattern of first decreasing and then increasing.
{"title":"Influence of blade wrap angle on internal flow and wear performance of solid-liquid two-phase centrifugal pump with semi-open impeller","authors":"Yanping Wang, Xiaofeng Deng, Mingliang Geng, Ruilin Tao, Yi Li, Zuchao Zhu","doi":"10.1177/16878132241258827","DOIUrl":"https://doi.org/10.1177/16878132241258827","url":null,"abstract":"Blade wrap angle is one of the main parameters of centrifugal pump, which has an important influence on the internal flow characteristic and pump performance. In this work, five impeller models with different blade wrap angles (85°, 95°, 105°, 115°, and 125°) are established on the condition of other impeller parameters remain unchanged, whose external characteristic, internal flow, and wear were analyzed by numerical simulation method. The results show that the influence of blade wrap angle on efficiency is more significant than head, has a certain effect on the internal flow field of the centrifugal pumps and effects the wear position of pressure surface. With the increasing of blade wrap angle, the pump efficiency increases companied by the pump head decreases slightly, the area of higher speed at the outlet of the impeller tends to decrease, the higher speed wake area at the end of the blade pressure surface breaks and shrinks, the vortex in the impeller passage is fewer and smaller, the turbulent kinetic energy and morphology of vortex inside the pump decreases gradually, and the wear rate of the flow passage components shows a pattern of first decreasing and then increasing.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"14 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Contactors are extensively utilized in the control field. Enhancing the response speed and reducing mechanical tremors during switching-in hold great significance in improving contactor’s reliability. A novel A.C. contactor suitable for low-voltage environments has been developed based on the unique properties of the magnetic shape memory alloy (MSMA). It exhibited remarkable characteristics such as large dependent variables, fast response speed, and strong controllability. First, the magnetron characteristics of the MSMA were introduced. Then, the overall structure of the new contactor was designed based on the MSMA output characteristics and the contactor’s design requirements. Next, switching-in characteristics of the contactor under the drive signal were analyzed through simulation. Finally, an experimental measurement was carried out to test the performance of the prototype contactor during separating brake and switching in. The A.C. contactor driven by the MSMA could achieve a response speed of 9.8 ms. The contact movement in the switching process is smooth, which effectively avoids the occurrence of contact bounce in the closing process, which provides theoretical support for the development of the MSMA in the field of low-voltage electrical control application research.
{"title":"Material performance analysis and structure design of the A.C. contactor driven by MSMA","authors":"Yulu Zeng, Senlin Huang, Jiaxin Wan, Longlong Tu, Hongtao Yu, Zhifang Zhu","doi":"10.1177/16878132241259031","DOIUrl":"https://doi.org/10.1177/16878132241259031","url":null,"abstract":"Contactors are extensively utilized in the control field. Enhancing the response speed and reducing mechanical tremors during switching-in hold great significance in improving contactor’s reliability. A novel A.C. contactor suitable for low-voltage environments has been developed based on the unique properties of the magnetic shape memory alloy (MSMA). It exhibited remarkable characteristics such as large dependent variables, fast response speed, and strong controllability. First, the magnetron characteristics of the MSMA were introduced. Then, the overall structure of the new contactor was designed based on the MSMA output characteristics and the contactor’s design requirements. Next, switching-in characteristics of the contactor under the drive signal were analyzed through simulation. Finally, an experimental measurement was carried out to test the performance of the prototype contactor during separating brake and switching in. The A.C. contactor driven by the MSMA could achieve a response speed of 9.8 ms. The contact movement in the switching process is smooth, which effectively avoids the occurrence of contact bounce in the closing process, which provides theoretical support for the development of the MSMA in the field of low-voltage electrical control application research.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"210 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-24DOI: 10.1177/16878132241262683
Joonhyuk Park
A design method for suspension parameters is proposed to ensure the desired performance of a railway vehicle despite uncertainties. The method used in this study consists of two loops: a sub-loop, which uses parameter uncertainties to determine the minimum value of target performance, and a main loop, which optimises suspension parameters such that the minimal performance achieves Pareto optimality. Thus, by selecting a suitable Pareto solution that ensures the minimum performance is equal to or higher than the required performance, the robustness of the designed vehicle against the parameter uncertainties can be achieved. The lowest low-frequency damping ratio in the service speed range was selected as one of the design targets. The other target was the critical speed. Two wheel-rail contact characteristics were applied, considering the worst conditions for each design target. The distribution of the parameter uncertainties that minimised the vehicle performance showed distinct characteristics between the longitudinal and lateral suspension parameters, which provides useful information for the maintenance of railway vehicles. The performance analysis for 100,000 random samples shows that the vehicle performed better than the targets with a high probability despite the parameter uncertainties. Further, the simulation results using multi-body dynamics simulation software validated the viability of the proposed method.
{"title":"Design method for suspension parameters of high-speed railway vehicles considering uncertainties","authors":"Joonhyuk Park","doi":"10.1177/16878132241262683","DOIUrl":"https://doi.org/10.1177/16878132241262683","url":null,"abstract":"A design method for suspension parameters is proposed to ensure the desired performance of a railway vehicle despite uncertainties. The method used in this study consists of two loops: a sub-loop, which uses parameter uncertainties to determine the minimum value of target performance, and a main loop, which optimises suspension parameters such that the minimal performance achieves Pareto optimality. Thus, by selecting a suitable Pareto solution that ensures the minimum performance is equal to or higher than the required performance, the robustness of the designed vehicle against the parameter uncertainties can be achieved. The lowest low-frequency damping ratio in the service speed range was selected as one of the design targets. The other target was the critical speed. Two wheel-rail contact characteristics were applied, considering the worst conditions for each design target. The distribution of the parameter uncertainties that minimised the vehicle performance showed distinct characteristics between the longitudinal and lateral suspension parameters, which provides useful information for the maintenance of railway vehicles. The performance analysis for 100,000 random samples shows that the vehicle performed better than the targets with a high probability despite the parameter uncertainties. Further, the simulation results using multi-body dynamics simulation software validated the viability of the proposed method.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study addresses the critical need for enhanced vibration control and standardization in electric motors, pivotal to the operational efficiency of electric vehicles and thus, environmental sustainability. Recognizing the gap in unified standards for managing machine vibration, we propose a novel, integrated framework combining advanced vibrodiagnostic techniques and rigorous standardization processes. Our methodology involves a detailed analysis of existing vibration control practices, identifying deficiencies in current standards, and presenting an improved, comprehensive guideline tailored to electric motors’ unique requirements in transportation applications. The innovation of our approach lies in its dual focus on technical precision and environmental sustainability, offering a significant leap forward in vibrodiagnostics. We demonstrate the framework’s practical value through its potential to revolutionize electric motor maintenance strategies, enhance machine longevity, and reduce environmental impact. This research contributes to the broader goals of reducing greenhouse gas emissions and advancing sustainable transportation, emphasizing the importance of vibration control standards in achieving energy efficiency and reliability in electric transport systems.
{"title":"Elevating electric motor performance through rigorous vibration control and standardization","authors":"Shchasiana Arhun, Andrii Hnatov, Vasiliy Mygal, Nadezhda Kunicina","doi":"10.1177/16878132241262677","DOIUrl":"https://doi.org/10.1177/16878132241262677","url":null,"abstract":"This study addresses the critical need for enhanced vibration control and standardization in electric motors, pivotal to the operational efficiency of electric vehicles and thus, environmental sustainability. Recognizing the gap in unified standards for managing machine vibration, we propose a novel, integrated framework combining advanced vibrodiagnostic techniques and rigorous standardization processes. Our methodology involves a detailed analysis of existing vibration control practices, identifying deficiencies in current standards, and presenting an improved, comprehensive guideline tailored to electric motors’ unique requirements in transportation applications. The innovation of our approach lies in its dual focus on technical precision and environmental sustainability, offering a significant leap forward in vibrodiagnostics. We demonstrate the framework’s practical value through its potential to revolutionize electric motor maintenance strategies, enhance machine longevity, and reduce environmental impact. This research contributes to the broader goals of reducing greenhouse gas emissions and advancing sustainable transportation, emphasizing the importance of vibration control standards in achieving energy efficiency and reliability in electric transport systems.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"24 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-21DOI: 10.1177/16878132241259579
Siyuan Chang, Min Ye, Daqing Zhang, Yuchuan Ma, Jiale Zhang
In response to the issues of overheating of the shell and insufficient impact energy of the hydraulic rock drill, this paper focuses on the hydraulic rock drill with alternating front and rear return chambers. By establishing nonlinear and linear dynamic models, the influence of stroke amount and flow compensation on the hydraulic system is investigated, and an optimization method for impact characteristics is proposed. Considering factors such as hydraulic clamping force, fluid leakage, and rock properties, a feedback control numerical model is established for the impact system. This model is based on principles drawn from wave dynamics and fluid dynamics theories. It elucidates the dynamic characteristics of the impact piston, reversing valve, and high-pressure accumulator. Combining three linear models, this study investigates the influence of the advance amount of the return signal chamber and the gas pre-charge pressure of the high-pressure accumulator on the impact characteristics. A thorough laser experiment has been created to evaluate the actual rock drilling capabilities of the impact system. Proposed optimal parameters are tested experimentally to compare the impact performance before and after the enhancement. The results indicate an increase in impact power, validating the effectiveness of the proposed improvement method.
{"title":"Impact performance optimization for hydraulic rock drill based on stroke and flow compensation factors","authors":"Siyuan Chang, Min Ye, Daqing Zhang, Yuchuan Ma, Jiale Zhang","doi":"10.1177/16878132241259579","DOIUrl":"https://doi.org/10.1177/16878132241259579","url":null,"abstract":"In response to the issues of overheating of the shell and insufficient impact energy of the hydraulic rock drill, this paper focuses on the hydraulic rock drill with alternating front and rear return chambers. By establishing nonlinear and linear dynamic models, the influence of stroke amount and flow compensation on the hydraulic system is investigated, and an optimization method for impact characteristics is proposed. Considering factors such as hydraulic clamping force, fluid leakage, and rock properties, a feedback control numerical model is established for the impact system. This model is based on principles drawn from wave dynamics and fluid dynamics theories. It elucidates the dynamic characteristics of the impact piston, reversing valve, and high-pressure accumulator. Combining three linear models, this study investigates the influence of the advance amount of the return signal chamber and the gas pre-charge pressure of the high-pressure accumulator on the impact characteristics. A thorough laser experiment has been created to evaluate the actual rock drilling capabilities of the impact system. Proposed optimal parameters are tested experimentally to compare the impact performance before and after the enhancement. The results indicate an increase in impact power, validating the effectiveness of the proposed improvement method.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"85 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141506976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-31DOI: 10.1177/16878132241255455
Yanfeng Li, Hsin Guan, Xin Jia
Modeling the interactive behavior of human drivers is essential for achieving safe and fully autonomous vehicles. Unfortunately, most decision-making systems employed in current autonomous vehicles rely on complex deep neural network models that function as black boxes with opaque reasoning that hampers human interpretation. Drawing upon the needs theories endorsed by psychologists and driving-related psychological research, we summarize five fundamental driving needs underlying the driver’s behavior: safety, dominance, achievement, order, and relatedness. Leveraging the behavior selection module from general cognitive architectures, we propose a decision-making model explicitly tailored for autonomous vehicles, comprising three distinct modules: needs assessment, motivation generation, and behavior selection. We conducted experiments to evaluate the proposed model using a self-developed 2D simulator based on Unity. The results intuitively visualized the motivation and behavior of self-driving vehicles. This model demonstrates remarkable proficiency in handling routine tasks, such as independent and complete driving tasks, intersection navigation, and maneuvering among multiple vehicles.
{"title":"An interpretable decision-making model for autonomous driving","authors":"Yanfeng Li, Hsin Guan, Xin Jia","doi":"10.1177/16878132241255455","DOIUrl":"https://doi.org/10.1177/16878132241255455","url":null,"abstract":"Modeling the interactive behavior of human drivers is essential for achieving safe and fully autonomous vehicles. Unfortunately, most decision-making systems employed in current autonomous vehicles rely on complex deep neural network models that function as black boxes with opaque reasoning that hampers human interpretation. Drawing upon the needs theories endorsed by psychologists and driving-related psychological research, we summarize five fundamental driving needs underlying the driver’s behavior: safety, dominance, achievement, order, and relatedness. Leveraging the behavior selection module from general cognitive architectures, we propose a decision-making model explicitly tailored for autonomous vehicles, comprising three distinct modules: needs assessment, motivation generation, and behavior selection. We conducted experiments to evaluate the proposed model using a self-developed 2D simulator based on Unity. The results intuitively visualized the motivation and behavior of self-driving vehicles. This model demonstrates remarkable proficiency in handling routine tasks, such as independent and complete driving tasks, intersection navigation, and maneuvering among multiple vehicles.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"43 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-30DOI: 10.1177/16878132241255209
Feixiang Liu, Mei Yang, Jie Ke
TBM tunnel surrounding rock classification is a key indicator for supporting decision-making and ensuring safe construction. And predicting the surrounding rock type accurately in advance is of great significance for TBM intelligent construction. This paper established the surrounding rock classification model based on support vector machine (LIBSVM), including preprocesses historical tunneling parameters, extracts data information that can accurately reflect the relationship between rock and machine, analyzes the correlation between different parameters and surrounding rock categories, and obtains highly relevant parameters. Based on the long short-term memory (LSTM), the prediction model of total thrust, cutter head torque, gripper pressure, cutter head rotate speed, and propulsion speed are established, which is the strongly correlated parameters with surrounding rock. Combining the parameter prediction model with the surrounding rock classification algorithm, the LSTM-SVM tunnel surrounding rock classification prediction model is established. The results showed that the coefficient of determination of the total thrust model, the cutter head torque, the gripper pressure, the cutter head speed, and the propulsion speed were 0.9825, 0.9396, 0.9974, 0.9843, and 0.9636. The overall prediction accuracy of the surrounding rock category can reach 86.0686%, which can provide a certain reference for predicting the surrounding rock condition in a short distance.
{"title":"Prediction method of TBM tunnel surrounding rock classification based on LSTM-SVM","authors":"Feixiang Liu, Mei Yang, Jie Ke","doi":"10.1177/16878132241255209","DOIUrl":"https://doi.org/10.1177/16878132241255209","url":null,"abstract":"TBM tunnel surrounding rock classification is a key indicator for supporting decision-making and ensuring safe construction. And predicting the surrounding rock type accurately in advance is of great significance for TBM intelligent construction. This paper established the surrounding rock classification model based on support vector machine (LIBSVM), including preprocesses historical tunneling parameters, extracts data information that can accurately reflect the relationship between rock and machine, analyzes the correlation between different parameters and surrounding rock categories, and obtains highly relevant parameters. Based on the long short-term memory (LSTM), the prediction model of total thrust, cutter head torque, gripper pressure, cutter head rotate speed, and propulsion speed are established, which is the strongly correlated parameters with surrounding rock. Combining the parameter prediction model with the surrounding rock classification algorithm, the LSTM-SVM tunnel surrounding rock classification prediction model is established. The results showed that the coefficient of determination of the total thrust model, the cutter head torque, the gripper pressure, the cutter head speed, and the propulsion speed were 0.9825, 0.9396, 0.9974, 0.9843, and 0.9636. The overall prediction accuracy of the surrounding rock category can reach 86.0686%, which can provide a certain reference for predicting the surrounding rock condition in a short distance.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"47 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-30DOI: 10.1177/16878132241256026
Xiuhong Hao, Xiang Cai, Yujing Nie
The double-stator hybrid-excitation vernier motor (DSHEVM) is a type of low-speed high-torque motor. The establishment of an accurate mathematical model of the DSHEVM, accurate determination of the magnetic field distribution, and an explicit physical relationship between the design parameters and the output torque are the keys to multi-objective optimization. This study proposes an accurate DSHEVM subdomain model to obtain precise magnetic field distributions. This subdomain model considers the effects of the relative permeability of the permanent magnets, split-pole slots, and stator slots on magnetic field distribution. The governing equations of the seven subdomains are established in scalar magnetic potential. According to the boundary conditions and corresponding Fourier series expansion at the interface of each subdomain, the magnetic flux density distributions in the main subdomains are obtained, and the output torque of a DSHEVM is analyzed. Based on the finite element method and experiments, the calculation accuracy of the proposed subdomain method is verified. The findings of this study provide a basis for multi-objective optimization and precise analysis of loss and temperature field of the DSHEVM.
{"title":"Analytical computation of magnetic field distribution in double-stator hybrid-excitation vernier motor based on an accurate subdomain model","authors":"Xiuhong Hao, Xiang Cai, Yujing Nie","doi":"10.1177/16878132241256026","DOIUrl":"https://doi.org/10.1177/16878132241256026","url":null,"abstract":"The double-stator hybrid-excitation vernier motor (DSHEVM) is a type of low-speed high-torque motor. The establishment of an accurate mathematical model of the DSHEVM, accurate determination of the magnetic field distribution, and an explicit physical relationship between the design parameters and the output torque are the keys to multi-objective optimization. This study proposes an accurate DSHEVM subdomain model to obtain precise magnetic field distributions. This subdomain model considers the effects of the relative permeability of the permanent magnets, split-pole slots, and stator slots on magnetic field distribution. The governing equations of the seven subdomains are established in scalar magnetic potential. According to the boundary conditions and corresponding Fourier series expansion at the interface of each subdomain, the magnetic flux density distributions in the main subdomains are obtained, and the output torque of a DSHEVM is analyzed. Based on the finite element method and experiments, the calculation accuracy of the proposed subdomain method is verified. The findings of this study provide a basis for multi-objective optimization and precise analysis of loss and temperature field of the DSHEVM.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"18 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-30DOI: 10.1177/16878132241254769
Wenhao Qu, Zezheng Wang, Shunyi Song, Wei Teng, Yibing Liu
The large-capacity power flywheel energy storage system serves as a high-quality frequency modulation resource for the power system. Utilizing high-strength, low-density composite materials in the manufacture of flywheel rotors is a primary method for enhancing flywheel energy storage. In this paper, we focus on the large-size multi-ring composite flywheel rotor. Based on the elastic theory, the stress distribution formula of the anisotropic material rotor rim under high-speed rotation is derived. Based on the stress superposition principle, the stress analysis formula under the interference fit of the composite rim and the metal hub is obtained, and the analytical solution is given. Based on the radial displacement of each ring, a suitable amount of interference is determined. Subsequently, a finite element analysis model for the interference fit between the composite rim and the metal hub is established. The stress distribution of the rotor is simulated and analyzed. The simulation results are basically consistent with the analytical results, which verifies the rationality of the model. Finally, we analyze and compare the difference between multi-ring isomorphism and multi-ring isomerism, and then the applicability of the analytical solution and simulation solution to the stress distribution of three-ring and four-ring composite flywheel rotor is further verified. The results demonstrate that, for large-size composite flywheels, existing formula analysis calculations and finite element simulation calculations align, highlighting a need for experimental verification in future research.
{"title":"Simulation analysis of multi-ring interference assembly of large capacity composite flywheel rotor","authors":"Wenhao Qu, Zezheng Wang, Shunyi Song, Wei Teng, Yibing Liu","doi":"10.1177/16878132241254769","DOIUrl":"https://doi.org/10.1177/16878132241254769","url":null,"abstract":"The large-capacity power flywheel energy storage system serves as a high-quality frequency modulation resource for the power system. Utilizing high-strength, low-density composite materials in the manufacture of flywheel rotors is a primary method for enhancing flywheel energy storage. In this paper, we focus on the large-size multi-ring composite flywheel rotor. Based on the elastic theory, the stress distribution formula of the anisotropic material rotor rim under high-speed rotation is derived. Based on the stress superposition principle, the stress analysis formula under the interference fit of the composite rim and the metal hub is obtained, and the analytical solution is given. Based on the radial displacement of each ring, a suitable amount of interference is determined. Subsequently, a finite element analysis model for the interference fit between the composite rim and the metal hub is established. The stress distribution of the rotor is simulated and analyzed. The simulation results are basically consistent with the analytical results, which verifies the rationality of the model. Finally, we analyze and compare the difference between multi-ring isomorphism and multi-ring isomerism, and then the applicability of the analytical solution and simulation solution to the stress distribution of three-ring and four-ring composite flywheel rotor is further verified. The results demonstrate that, for large-size composite flywheels, existing formula analysis calculations and finite element simulation calculations align, highlighting a need for experimental verification in future research.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"51 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The efficient utilization of energy stands as a paramount priority on the international stage. Currently, there are various issues associated with the multi-power source couplers in automobiles. Addressing concerns related to the large size, poor reliability, low durability, and inefficient energy conversion of these couplers, a novel Permanent Magnet Synchronous Mechatronic-Electro-Hydraulic Coupler (MEHC) has been proposed. This system integrates a traditional permanent magnet synchronous machine with a swash plate axial piston pump/motor, enabling the mutual conversion of electrical, mechanical, and hydraulic energy. This paper primarily investigates the losses and efficiency of MEHC in both pure electric motor mode and electro-hydraulic coupling mode. Compared to our group’s previous Induction Asynchronous Mechatronic-Electro-Hydraulic Coupler (IA-MEHC), MEHC demonstrates lower losses and higher torque. Additionally, the paper also computes the electrical power external characteristics and comprehensive power external characteristics of the MEHC in pure electric motor mode. In the calculations within this paper, electric power is the primary power source, and in the electro-hydraulic coupling mode, hydraulics only provide auxiliary assistance. The research outlined in this paper lays a robust groundwork for future advancements and innovations in MEHC technology. With the capacity to bolster its performance, efficiency, and reliability, this groundwork holds the promise of accelerating the rapid development and widespread adoption of MEHC in automotive applications.
{"title":"Investigation on the external characteristics of permanent magnet synchronous mechatronic-electro-hydraulic coupler","authors":"Lingfeng Zhang, Hongxin Zhang, Baoquan Liu, Zhen Zhang, Yiming Jiang","doi":"10.1177/16878132241253667","DOIUrl":"https://doi.org/10.1177/16878132241253667","url":null,"abstract":"The efficient utilization of energy stands as a paramount priority on the international stage. Currently, there are various issues associated with the multi-power source couplers in automobiles. Addressing concerns related to the large size, poor reliability, low durability, and inefficient energy conversion of these couplers, a novel Permanent Magnet Synchronous Mechatronic-Electro-Hydraulic Coupler (MEHC) has been proposed. This system integrates a traditional permanent magnet synchronous machine with a swash plate axial piston pump/motor, enabling the mutual conversion of electrical, mechanical, and hydraulic energy. This paper primarily investigates the losses and efficiency of MEHC in both pure electric motor mode and electro-hydraulic coupling mode. Compared to our group’s previous Induction Asynchronous Mechatronic-Electro-Hydraulic Coupler (IA-MEHC), MEHC demonstrates lower losses and higher torque. Additionally, the paper also computes the electrical power external characteristics and comprehensive power external characteristics of the MEHC in pure electric motor mode. In the calculations within this paper, electric power is the primary power source, and in the electro-hydraulic coupling mode, hydraulics only provide auxiliary assistance. The research outlined in this paper lays a robust groundwork for future advancements and innovations in MEHC technology. With the capacity to bolster its performance, efficiency, and reliability, this groundwork holds the promise of accelerating the rapid development and widespread adoption of MEHC in automotive applications.","PeriodicalId":7357,"journal":{"name":"Advances in Mechanical Engineering","volume":"78 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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