The energy transmission device of the gear box and the stability of the system

The gearbox body is used as a widely used energy transmission device in its mechanical equipment during the manufacturing process, and its level in the design process reflects the comprehensive national strength and industrial technology level to a certain extent. With the rapid development of science and technology, people have put forward higher requirements for gearboxes in terms of high speed, high power, light weight, low vibration, and low noise. As for the high-speed gearbox on the centrifugal compressor unit, due to its high speed and complex working environment.

The gear box body can make the box body support and position the gear transmission, but also bear the vibration from the gear meshing impact. The gear box body can be used as an important basic part in the gear transmission system, and its performance directly affects
The stability of the gear system makes it extra important to study the dynamic and static performance of the gearbox.

The gear box body will respectively establish simplified models of the three box parts of the upper, middle and lower parts of the box body in the three-dimensional modeling, and complete the overall assembly. Using the seamless connection between CAD and CAE, the simplified model of the gear box was imported into ANSYS to complete the establishment of the finite element model of the box structure. Through the analysis and calculation of the force of the gearbox under rated working conditions, the load loading and boundary condition setting of the finite element model are completed, and the static characteristics of the gearbox can be analyzed from the static characteristics of the gearbox. The deformation and limits of the box structure can be learned. Effectiveness.

The gearbox body is undergoing modal analysis, and the first ten modal frequencies and corresponding vibration shapes in the analysis structure are extracted, and then the original design dynamics are evaluated by comparing the rotation frequency and meshing frequency of each transmission gear in the gearbox Reliability of performance, and find out the main factors and action parts that cause the overall vibration of the box.

The gearbox body is mainly based on the analysis results of the static and dynamic characteristics of the high-speed gearbox body. To a certain extent, its design goals are selected, and seven design variables are screened out. Through multi-objective design theory, balance the interrelationship between multiple objectives, and complete the multi-objective structural optimization design of the gear box under the allowable constraints of the overall rigidity and strength of the box.