Design and analysis of a new down‐the‐hole electromagnetic hammer driven by tube linear motor

Wu, Tao; Tang, Yiru; Tang, Shengwen; Li, Yongbo; He, Weifeng; Chen, E

doi:10.1049/iet-epa.2017.0208

Cited by 15 publications

(11 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e mathematical modeling of the DTH hammer is mainly based on a one-dimensional gas flow equation of state, energy conservation equation, continuous equation in the front and rear chambers, and piston motion differential equation [23][24][25]. e piston movement distance can be calculated by selecting the time step, and the state parameters in each time step can be regarded as those in a quasi-static process (Figure 4).…”

Section: Modeling Of the Pneumatic Dth Hammermentioning

confidence: 99%

Design Optimization and Performance Analysis of the Pneumatic DTH Hammer with Self‐Propelled Round Bit

Sun

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

Although pneumatic down-the-hole (DTH) hammers have good performance of high penetration rate and minimal deviation tendency in the vertical section of oil and gas wells, they have not been successfully used in directional drilling due to drill tool wear and wellbore disturbance. Herein, we developed a novel type of pneumatic DTH hammer with a self-propelled round bit to overcome the technical difficulties of directional drilling. Nonlinear dynamic modeling developed by the authors was used to analyze the working principle and performance of the novel DTH hammer. The kinematics and dynamics simulation of this hammer were carried out using MATLAB language, and the motion law of the piston was revealed. The performance of the novel hammer was numerically simulated and evaluated by considering fluctuations of the front and rear chamber pressure, impact energy, acceleration, and frequency. The results show that our novel DTH hammer’s working principle is feasible and has an adequate structural design. The simulation results demonstrate reasonable design parameters. Compared to the numerical results for conventional DTH hammers, the velocity and acceleration of the piston of the novel hammer changed smoothly. The frequency was slightly higher than that of conventional hammers, while other parameters were nearly equal. The novel DTH hammer can be used in directional drilling, trenchless drilling, and seabed sampling drilling.

show abstract

Section: Modeling Of the Pneumatic Dth Hammermentioning

confidence: 99%

Design Optimization and Performance Analysis of the Pneumatic DTH Hammer with Self‐Propelled Round Bit

Sun

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Besides the energy efficiency, there are many other specifications and/or requirements for the design optimization of electrical machines, such as torque, power density, volume and weight. For special applications like geologic or petroleum drilling engineering and aerospace engineering, more requirements and extreme constraints should be investigated [4][5][6]. For example, the environment temperature for motors used in petroleum and geology may reach 300 °C, or even to 500 °C.…”

Section: Energy and Environmental Challengesmentioning

confidence: 99%

A Review of Design Optimization Methods for Electrical Machines

et al. 2017

View full text Add to dashboard Cite

Electrical machines are the hearts of many appliances, industrial equipment and systems. In the context of global sustainability, they must fulfill various requirements, not only physically and technologically but also environmentally. Therefore, their design optimization process becomes more and more complex as more engineering disciplines/domains and constraints are involved, such as electromagnetics, structural mechanics and heat transfer. This paper aims to present a review of the design optimization methods for electrical machines, including design analysis methods and models, optimization models, algorithms and methods/strategies. Several efficient optimization methods/strategies are highlighted with comments, including surrogate-model based and multi-level optimization methods. In addition, two promising and challenging topics in both academic and industrial communities are discussed, and two novel optimization methods are introduced for advanced design optimization of electrical machines. First, a system-level design optimization method is introduced for the development of advanced electric drive systems. Second, a robust design optimization method based on the design for six-sigma technique is introduced for high-quality manufacturing of electrical machines in production. Meanwhile, a proposal is presented for the development of a robust design optimization service based on industrial big data and cloud computing services. Finally, five future directions are proposed, including smart design optimization method for future intelligent design and production of electrical machines.

show abstract

“…Permanent magnet linear synchronous motors (PMLSMs) have the advantages of simple structure, high thrust density, high positioning accuracy, high speed, high acceleration and so on. They have wide application prospects in the field of high precision linear motion control [1][2][3]. However, the structure of the linear motor has its particularity of open primary core that leads to a large end effect.…”

Section: Introductionmentioning

confidence: 99%

Design principle of a 16‐pole 18‐slot two‐sectional modular permanent magnet linear synchronous motor with optimisation of its end tooth

Huang

Zhang

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

In order to improve the performance of the linear motor system, it is necessary to adopt a simple motor structure and effective optimisation method to reduce the detent force without decreasing the average thrust. A 16-pole 18-slot two-sectional modular permanent magnet linear synchronous motor (PMLSM) is investigated in this study, in which the primary core is divided into two modules and coupled with the secondary, forming two sections. It is found that the modular distance between the two sections affects the detent force and back-electromotive force of the whole motor. Thus, the characteristics of the detent force and the categories of the winding arrangements are analysed. The modular distance of 4τ/9 is chosen after analysis and comparison. To further suppress the detent force and improve the average thrust, a new end tooth structure including different wide and narrow tooth is proposed, which is set at the ends of each section's primary core. The design method of the end tooth parameters is obtained by theoretical derivation and the optimisation efficiency of end tooth parameters is further improved by layered optimisation design. Finally, the experiments on the 16-pole 18-slot PMLSM validate the correctness and feasibility of the proposed modular motor structure.

show abstract

Design and analysis of a new down‐the‐hole electromagnetic hammer driven by tube linear motor

Cited by 15 publications

References 20 publications

Design Optimization and Performance Analysis of the Pneumatic DTH Hammer with Self‐Propelled Round Bit

Design Optimization and Performance Analysis of the Pneumatic DTH Hammer with Self‐Propelled Round Bit

A Review of Design Optimization Methods for Electrical Machines

Design principle of a 16‐pole 18‐slot two‐sectional modular permanent magnet linear synchronous motor with optimisation of its end tooth

Contact Info

Product

Resources

About