Kinetostatic study of the mechanism

Contents

Contents

Summary

Purpose and objectives of coursework

Job for course work

Explanatory Note

1. To Create a Kinematic Mechanism Diagram

2. Gear ratio of reduction gear box

3. Speed Plan

4. Acceleration Plan

5. Defining Link Inertia Forces

6. Assur Group Power Calculation

7. Calculation of the starting link

8. Zhukovsky lever

9. Assessment of error of Furili Moore determination

10. Determination of engine power

Literature

Summary

Course work contains tasks for studying the structure, kinematics and dynamics of the simplest machine with a toothed drive and an actuating crank-slider mechanism.

The theory of Machines and Mechanisms (TMM) is a science that studies general methods of studying mechanisms and machines, and designing their schemes.

The main task of the TMM course is to establish general principles by which the mechanism is built and formed, the development of scientific provisions and technical techniques for the synthesis and analysis of mechanism schemes.

This discipline is based on the courses of Higher Mathematics, Theoretical Mechanics and Physics and, along with the disciplines of Material Resistance and Machine Parts, forms the basis for the training of engineers in all engineering specialties.

Purpose and objectives of coursework

The purpose of this course work is a kinetostatic study of the mechanism, as a result of which reactions in kinematic pairs and a balancing force (or balancing moment) on the driving link are determined.

Kinematic analysis of the mechanism is carried out to achieve the set goal, as a result of which the acceleration of mass centers of links and their angular accelerations are determined, which makes it possible to determine inertia forces and moments of inertia forces of links.

Taking into account the inertia forces and moments of inertia forces along with other forces acting on the links of the mechanism allows you to use the statics method to determine reactions in kinematic pairs and balancing force (Furov.) (or balancing moment - Murov.), Acting on the leading link of the mechanism.

Knowledge of reactions in kinematic pairs is necessary for the construction of links, and Furov. or Murov. to determine engine power.

When examining the mechanism, the following assumptions were made:

1. Mechanism links are located in the same plane.

2. Consider that there are no friction forces in kinematic pairs.

During kinematic analysis the following tasks are solved:

a) Construction of the kinematic circuit of the mechanism in the specified position.

b) Determination of angular velocities of links and speeds of their points.

c) Determination of angular accelerations of links and accelerations of their points.

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