performance of structural, kinematic analysis, force study of the piston compressor.

Contents

Introduction

1 Structural analysis of lever mechanism

2 Kinematic examination of lever mechanism

2.1 Construction of combined plans of mechanism provisions

2.2 Construction of speed plans

2.3 Construction of acceleration plans..... 2.4 Movement diagrams of the working element 3 Power calculation of the lever mechanism. 3.1 General information. 3.2 Indicator diagram (ID). 3.3. Define reactions in kinematic pairs of the Assur group

(links 4 and 5)

3.4. Define reactions in kinematic pairs of the Assur group

(links 2 and 3)

3.5. Power calculation of initial link group (links 6 and 1)

Conclusion

List of sources used

Paper

Coursework: 30 pages, 3 tables, 11 figures, 7 sources, illustrative part: 2 sheets of A1 format.

COMPRESSOR MECHANISM, CRANK, CONNECTING ROD, SLIDER, MECHANISM STRUCTURE, KINEMATIC SCHEME, KINEMATIC ANALYSIS, MECHANISM POSITION PLAN, MECHANISM SPEED PLAN, MECHANISM ACCELERATION PLAN, POWER CALCULATION, DIAD FORCE PLAN, KINEMATIC PAIR REACTION, BALANCING MOMENT.

Object: Piston compressor.

Purpose: structural, kinematic analysis, power study of piston compressor.

This course work presents calculations related to structural and kinematic analysis, power study of the lever mechanism. Speeds and accelerations of mechanism points, reactions in kinematic pairs, balancing moment on crank shaft are determined.

Introduction

Course work on the theory of mechanisms and machines (TMM) is an independent work that completes the study of this discipline. In the process of development, the skills of applying the learned basic positions and conclusions of the theory of mechanisms and machines are acquired to solve the following problems of designing machine unit mechanisms:

1) structural and kinematic analysis of the lever mechanism;

2) power calculation of lever mechanism.

The TMM heading task contains the names of the machine unit mechanisms being developed, namely, the piston compressor lever mechanism, kinematic diagrams, technical ones, as well as additional instructions necessary for design.

3 Power calculation of lever mechanism

3.1 General provisions

Power calculation objectives:

determination of reactions in kinematic pairs;

determination of balancing force (moment) applied to the initial link of the mechanism

Knowledge of the reaction values allows:

a) perform calculations of links and elements of kinematic pairs for strength, rigidity, wear resistance and vibration resistance;

b) determine the type and dimensions of rolling bearings;

c) calculate the efficiency of the mechanism, etc.

Knowledge of balancing forces allows you to determine the power required for the operation of the mechanism.

Force calculation is made taking into account accelerated motion by kinetostatics method. The method is based on the application of the Dalamber principle, in which, after adding inertia forces to external forces, the mechanism is conditionally considered stationary and statics equations are used to determine unknown forces.

Power calculation procedure:

divide the mechanism into structural groups (Assur groups) with W = 0 and the primary mechanism (group of initial links) with W = 1;

perform power calculation of Assur groups starting from the group farthest from the primary mechanism;

we end the calculation with a primary mechanism.

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