Method for measuring variable stiffness in process of gear mesh

Abstract

The invention relates to a method for measuring variable stiffness in the process of gear mesh. A state, between single-tooth and double-tooth alternative mesh critical states, of two gears serves as a mesh measurement period, and a formula (see the instructions) in one mesh measurement period is marked as a rotation angle of a pinion, wherein the epsilon is a gear contact ratio, Zp is the number of teeth of the pinion, i can be anyone in 1, 2, 3..., 10, the marked rotation angle thetai of the pinion serves as a measuring position, and stiffness values Ki at all measuring positions of the pinion are connected to obtain a meshing stiffness in one mesh measurement period of the gears. By means of the method for measuring the variable stiffness in the process of gear mesh, the variable stiffness in the process of gear mesh can be rapidly measured, the practical measurement efficiency can be greatly improved, test time is saved by setting the mesh measurement period and determining the measuring points, a rapid and effective verification test is provided for the design of gears, more importantly, the efficient measuring method even proximate to the production rhythm is provided for manufacturing enterprises, and the method is suitable for being applied to mass production.

Description

technical field [0001] The invention relates to the technical field of mechanical measurement, in particular to a method for measuring the time-varying stiffness of gear meshing. Background technique [0002] With the rapid development of science and technology and industry, gear transmission has become the most widely used transmission form in modern machinery. All aspects put forward very high requirements for gear transmission. These requirements are mainly to ensure low vibration and low noise of gear transmission under the premise of high load capacity and high reliability. As we all know, the meshing stiffness of the gear is one of the important excitation sources of the vibration and noise of the gear system. At the same time, the failure of gear teeth is also closely related to the meshing stiffness of gears. Therefore, how to determine the meshing stiffness of gears is one of the important directions in the research of gear shock vibration and noise. In the tradi...

AI Technical Summary

Problems solved by technology

In the traditional method of obtaining the meshing stiffness of gears, the method of establishing a mathematical model derivation based on classical mechanics principles has the defect of a large error between the theoretical model and the actual model; the method of direct measurement has the problem of damage to the embedded piezoelectric sensing material. The tooth structure and the defect that the gear transmission deviates from the actual situation; in order to overcome the above defects, some inventors proposed a public technology called "Measurement method for dynamic meshing stiffness of spur gears" (application number CN200810017779.2) , the disclosed technology measures the dynamic meshing stiffness of spur gears under the condition that the gears are not damaged. In the actual measurement, the output angle and the dynamic friction torque of the output end are respectively measured at each point of the driving gear and the driven gear, but the measurement point is not specified. The location of the gear, and the method of quickly determining the measurement point is not systematically given, which makes the workload of the actual measurement larger, which is not conducive to the rapid measurement verification of the gear design, especially not suitable for the rapid measurement in the mass production of the enterprise

Images