Design and research of compressor plant ICE mechanisms

Contents

TERMS OF REFERENCE

1. Dynamic synthesis of cam mechanism

1.1. To Create a Kinematic Pusher Motion Diagram

1.2. To Create a Valid Cam Rotation Center Location

1.3. Building Theoretical and Practical Cam Profiles

1.4. Plot pressure angle change

1.5. Determination of cam efficiency

1.6. Defining Spring Parameters

2. Synthesis of gearing and planetary mechanism

2.1. Synthesis of the planetary mechanism

2.2. Involute Gear Synthesis

2.3. Plotting Specific Slip

2.4. Plotting Specific Pressure

3. Kinematic analysis of lever mechanism

3.1. Analysis of source data

3.2. Structural analysis of the mechanism

3.3. Geometric synthesis of the mechanism

3.4. Building kinematic diagrams

3.5. Building Speed Plans

3.6 Building an Indicator Chart

4. Dynamic examination of lever mechanism

4.1. Determination of the given moment of inertia of links of lever mechanism

4.2. Determination of given moments of resistance forces

4.3. Building a Work Chart

4.4. Plot the kinetic energy change

4.5. Building an energy mass diagram

4.6. Construction of initial link tachogram, determination of actual unevenness coefficient

4.7. Flywheel Calculation

4.8. Construction of mechanism tachogram with flywheel

4.9. Plot angular accelerations with and without the flywheel

4.10. Build acceleration plan in position

5. Power calculation of lever mechanism

5.1. Power calculation of the Assur GDP group (4-5)

5.2. Power calculation of the Assur GDP group (2-3)

6. Determination of instantaneous efficiency of lever mechanism

7. Check of power calculation using Zhukovsky lever

Conclusion

List of literature used:

1. Synthesis of cam mechanism.

A cam mechanism is a mechanism that includes a cam. A cam is a link having a higher pair member formed as a surface of variable curvature. The cam is usually the starting link. The output link is called a pusher if it reciprocates, or a rocker if it reciprocates.

Complete cycle of pusher motion includes phases of removal (from cam) and return, which are carried out when cam is turned by angles of, respectively, to and from. Between them there can be far and (or) near heights (corresponding angles - ¼ d.s. and ¼ b.s.).

Piston displacement in plunger pump is performed by cam mechanism consisting of cam and translational pusher. The technical assignment defines the law of changing the acceleration of the pusher depending on the angle of rotation of the cam. In addition, the following inputs are defined:

Cam working profile angle: p = 360 deg;

Maximum pusher stroke: hT = 0.014 m;

Allowable pressure angle: - 18 deg;

Eccentricity: e = 0 m;

Pusher acceleration ratio: a1/a2 = 1.

3. Kinematic examination of lever mechanism.

Lever mechanisms are called mechanisms whose links form only rotary, translational, cylindrical and spherical pairs. The link of the lever mechanism, which forms a translational pair with the post, is called a slider, and the rotary crank (if it can make a full revolution) or a rocker (incomplete revolution). A link not connected to the rack is called a connecting rod. A link is called a link rotating around a fixed axis and forming a translational pair with another movable link.

Kinematic study of the mechanism means the study of the movement of its links according to the given law of movement of the initial link without taking into account the existing forces. Kinematic research is carried out in order to determine the positions, speeds and accelerations of the links, as well as to construct the movement of characteristic points of the mechanism.

The cycle or period of operation of the mechanism is the period of time after which the links of the mechanism return to their original position, after which the working process in the mechanism is repeated.

Conclusion

During the course project the following results were obtained:

1. Cam mechanism with translational pusher is designed.

2. Planetary reduction gear is designed.

3. A spur-shaped cylindrical involute equilibrated transmission with a module, displacement factor and and overlap factor is designed.

4. Lever mechanism is designed, motion law of drive link is defined, force calculation is performed for the 5th position, reactions in kinematic pairs are determined.

5. Instantaneous efficiency of lever mechanism is calculated