Kinematic and dynamic investigation of piston compressor mechanism

Contents

Introduction

1 Structural analysis of piston compressor mechanism

2 Kinematic examination of piston compressor mechanism

2.1 Drawing up plans for the provisions of the mechanism

2.2 Construction of compressor mechanism speed plans

2.2.1 Determination of initial link speeds

2.2.2 Determination of rates of Asura groups connected

2.2.2.1 Assur Group (2-3)

2.2.2.2 Assur Group (4-5)

2.3 Construction of compressor mechanism acceleration plans

2.3.1 Determination of initial link accelerations

2.3.2 Determination of absolute and relative accelerations

points and angular accelerations of links connected

Assur group

2.3.2.1 Assur Group (2-3)

2.3.2.2 Assur Group (4-5)

3 Dynamic investigation of piston compressor mechanism

3.1 Position Determination for Force Survey

3.2 Determination of link weights

3.3 Determination of inertia forces of links

3.4 Determination of moments of inertia from inertia forces

3.5 Determination of reactions in kinematic pairs of Asura group 4-

3.6 Determination of reactions in kinematic pairs of Assur group 2-

3.7 Determination of balancing moment at input link

3.8 Determination of reactions in kinematic pair of input link

3.9 Determining the balancing moment by

Zhukovsky lever

3.10 Calculation of error

Conclusion

Bibliographic list

Paper

The course work contains 41 s., 14 figures, 6 tables, 5 sources.

MECHANISM, ASSY GROUP, MECHANISM STRUCTURE, MECHANISM STRUCTURAL ANALYSIS, POINT VELOCITY, VELOCITY PLAN, POINT ACCELERATION, ACCELERATION PLAN, LINK MASS, INERTIA FORCE, WEIGHT, MOMENT OF INERTIA, LINK HINGE REACTIONS, FORCE BALANCING MOMENT, FORCE PLAN, BUG ANALYSIS,

In this work, structural analysis, kinematic and dynamic investigation of the piston compressor mechanism was carried out. Kinematic pairs and Assur groups are identified and described in the mechanism. Built a speed plan for twelve positions of the mechanism. Linear speeds of points and angular accelerations of mechanism links are determined. An acceleration plan for the six provisions of the mechanism has been built. Linear accelerations of points and angular accelerations of mechanism links are determined. Power calculation of the mechanism was performed. Masses, inertia forces and moments of inertia of links were found. Force plans have been drawn up for all Assur units of the mechanism. Reactions found in mechanism hinges. A balancing force and a balancing moment of the forces of the mechanism were found, a check was made according to Zhukovsky's theorem. Found error of calculations on the Zhukovsky lever.

Task

To the student's coursework

1. Course topic: "Kinematic and dynamic study of the piston compressor mechanism"

2. The term for the student to complete the course work 30.12.2019

3. Initial data for the course work:

- diagram is selected from task - 8;

- digital data - from the variant - 3.

4. Contents of the explanatory note:

- task;

- maintenance;

- structural analysis of the mechanism;

- kinematic examination of the actuator by the method of speed plans;

- determination of values and directions of power factors acting on the actuator links;

Dynamic examination of the mechanism by kinetostatic analysis;

- determining the balancing moment using the Zhukovsky lever and calculating the error.

5. List of annex materials (availability of drawings, tables, diagrams, software products):

5.1. Sheet 1 "Kinematic examination of piston compressor mechanism":

- structural analysis.

- plans of provisions of the mechanism;

- speed plans;

- acceleration plans.

5.2. Sheet 2 "Dynamic Study of Piston Compressor Mechanism":

- design position of the mechanism;

- speed and acceleration plan for design position;

- Assur group;

- Force plans for each Assur team;

- determination of balancing moment at the input link of the mechanism;

- determination of the given moment of resistance forces with the help of Zhukovsky lever.

Conclusion

In the course of course work, the knowledge gained in the study of general technical disciplines is fixed: theoretical mechanics, higher mathematics.

By performing a kinematic analysis of the actuator of the piston compressor by graphical and analytical methods, data were obtained on the nature of the movement of the compressor parts. After the study, the module of speed and acceleration of the point B of the mechanism and its direction can be learned at any point in the path of its movement, as well as the module and direction of speed and acceleration of any point, any link of the lever mechanism, applying plans of positions, speeds and accelerations.

In this work, the mechanism of the piston compressor was investigated, a kinematic and dynamic study of the mechanism was carried out. The mechanism was investigated by the graphoanalytic method. In a dynamic study, a balancing moment at the input link and a moment at the lever of N.E. Zhukovsky were determined. From the obtained values, the relative error is calculated, which does not exceed the permissible (4%) and is 0.258%.

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