When introducing the high-speed rotor vibration characteristics and critical speed concept of the centrifugal compressor, the definitions of the maximum speed and the minimum speed are introduced, and the method for measuring the static balance and dynamic balance of the high-speed rotor is explained. When introducing the reciprocating piston compressor, the latest calculation method of piston force and integrated piston rod force, system vibration analysis type and related analysis software are introduced in detail.
Following the rules of teaching to cultivate engineering concepts Foreign textbooks are good at combining the basic theoretical knowledge of disciplines with the advances of disciplines. Examples are rich, and theories are linked to reality. Some practical problems extracted from engineering and daily life are often used as examples and engineering cases to illustrate basic concepts and principles for students to understand and master. For example, each chapter of the engineering thermodynamics textbook has a certain number of examples, and there are nearly a hundred or so exercises. Moreover, the classification of the exercises is not only a simple calculation problem to consolidate the concept, but also a complex exercise that requires calculation of the program. After each chapter, there is an introduction to the extended content and a summary of the contents of the chapter, which will help students expand their knowledge and summarize what they have learned.
Starting from the practical problems of engineering, focus on cultivating the initiative, creativity and imagination of students' learning; while domestic textbooks emphasize the disciplinary system and logic, and more from the theorem and formula deduction. When introducing the actual gas state equation, it not only lists the comparison of calculation results, but also features special graphs and curves such as three-dimensional, the latest thermal process equation application, and introduces knowledge in a more intuitive way. When introducing natural gas, it emphasizes its flammable and explosive characteristics, which makes it easy to understand the strict explosion-proof requirements of seals, motors and instruments for natural gas pipeline engineering compressors, and strengthen the engineering concept of students.