Belt transmission characteristic parameter teaching model demonstrator

Abstract

A belt transmission characteristic parameter teaching model demonstrator is that the driving wheel and the driven wheel are arranged horizontally and symmetrically, and an upper belt passing wheel and a belt lower passing wheel are arranged on the center line of the horizontally symmetrical center line of the driving wheel and the driven wheel, so that the belt can pass through The driving wheel, the driven wheel, the upper pulley and the lower pulley form a belt transmission mechanism, and the angle between the belt is 120° at the position of the upper pulley and the lower pulley, and a pressure sensor and a speed sensor are also provided. Sensors and their displays. The invention is intuitive and convenient, reveals the measurement and performance demonstration of various parameters of the belt transmission teaching in a simple and easy-to-understand way, has the characteristics of economy, practicality and convenience, and is suitable for the belt transmission teaching demonstration.

Description

technical field [0001] The invention relates to a belt transmission teaching demonstration device, in particular to a teaching demonstration device for measuring characteristic parameters of teaching belt transmission. Background technique [0002] The belt drive test bench used for teaching at home and abroad is mainly an industrial test bench. This test bench is designed and manufactured by a transmission belt manufacturer, not a classroom teaching demonstrator for belt drive teaching. Domestically, there are mainly DLS-B design belt transmission test benches, etc., which rely on manual operation to adjust the speed load, while the main development direction abroad is computer distributed control type control, which uses digital display panel readings or computer test and analysis software to measure belt slip and transmission efficiency. It realizes the measurement of the slip rate of flat belt and V-belt and the measurement of belt transmission efficiency, and automatica...

AI Technical Summary

Problems solved by technology

Its shortcoming is that when the belt drive test bench is directly used for teaching experiment demonstration, although it meets the accuracy requirements of belt drive experiment teaching, the measured data only have the main parameters related to the design of the drive belt, such as input torque, output torque, etc. Torque, input speed, output speed, so as to obtain the slip rate, efficiency, etc., which are quite different from the parameters that need to be understood and mastered in classroom teaching

Among them, since there is no belt tension mechanism, it is impossible to measure the initial tension, tight side tension and loose side tension, so that the effective circumferential force cannot be calculated, and the Euler formula cannot be obtained; At the time, it can only be adjusted by the number of connected resistors (that is, electric lights). Although the image is intuitive, it also leads to the problem of discontinuous increase in load; in the experiment, the pre-tightening force is required to be too large, and the position of the tight side and the loose side cannot be observed. It is impossible to continuously increase the load, pre-tightening force, etc., and it is impossible to observe the phenomenon of elastic slippage

[0004] In addition, the above-mentioned belt drive test bench adopts microcomputer distributed control technology and experimental data processing and management technology, which makes the computer an essential component of the experimental equipment, improves the accuracy of experimental data, and increases teaching investment, especially in the teaching of belt drive. Among them, the teacher can only simply explain the theoretical knowledge, which makes the classroom become a boring speech. When doing experiments, students need to review the content explained by the teacher before the experiment, which greatly lengthens the teaching time of the chapter of belt transmission. The automation level of the experimental bench is high, and the data processed by the computer makes the observed data abstract, and also reduces the students' ability to practice, and the experimental course also loses its due role and effect

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