Course for solar array panel production

Contents

Contents

Task

Introduction

1. Structural analysis of the mechanism

2. Determination of basic dimensions of the mechanism

3. Kinematic examination of the mechanism

3.1Making speed plans

3.2Determination of kinematic transfer functions of the first order

4. Investigation of movement of the mechanism under the action of given forces

4.1 Determination of total reduced moment of external forces

4.2 Determination of total reduced moment of inertia of the mechanism

4.3 Determination of total reduced moment operation values

4.4 Determination of angular velocity and acceleration of the initial link

5. Power calculation of the mechanism

5.1 Build Acceleration Plan

5.2 Determination of reactions in CP. 17 5.3 Determination of total reduced moment of forces of harmful resistance

6. Gear Synthesis

6.1 Assignment of transmission ratios of individual stages of gear mechanism

6.2 Selection of gear wheel gear numbers

6.3 Check correct selection of tooth numbers

6.4 Determination of basic geometrical parameters of gears

mechanism

6.5 Kinematic examination of gear mechanism by graphoanalytic method

7. Calculation of geometrical parameters of involute gear

7.1 Selection of displacement factors of involute gears

gearings

7.2 Calculation of geometrical parameters of displaced involute

gearings

7.3 Check of geometrical conditions of involute

gearings

7.4 Determination of quality characteristics of involute engagement

7.5 Drawing an Involute Gear Pattern

Conclusion

Application

List of used literature

Introduction

Lever mechanisms have been widely used in technology. They are used in power plants, in artificial Earth satellites for the deployment and orientation of solar panels, in steering gears, in landing gear release and retraction mechanisms, in mechanisms for changing the sweep of aircraft wings, in mechanisms for turning aircraft wings with vertical take-off and landing, as well as in a number of other aircraft systems. Lever mechanisms are widely used in aircraft ground equipment and plant process equipment. They are one of the main elements of moving rocket installations, lifting and reloading devices, machine tools of various types, conveyors, devices and other machines. Lever mechanisms are part of robots and manipulators.

Gear mechanisms are used in power plants as reduction gears to reduce rotation speed during power extraction from the turbine. Gearboxes in the drives of the carrier and steering screws of the helicopter were widely used. Gear mechanisms are used in mechanisms for turning and trimming aircraft wings, docking units of spacecraft and technological equipment.

The link mechanism is often used in strict and continuous machines, piston pumps, compressors, as well as hydro and pneumatic drives. It is used to convert one type of rotational motion to another. The most common type of drive is motor drive, which is a system consisting of an electric motor and a planetary reduction gear.

The purpose of course design is to gain skills in the use of common design methods and research of mechanisms intended for aircraft, their ground and technological equipment. The initial data is the job for the course project.

Excel spreadsheet editor was used for calculations, all drawings were made using KOMPAS 5 graphic editor. 11.

Power calculation of the mechanism

The purpose of the force calculation of the mechanism is to determine reactions in the CP. These forces are used in the refined study of the movement of the mechanism links, conducting calculations for strength, stiffness, wear resistance and vibration resistance.

In force calculation, we assume that the mechanism has a plane of symmetry parallel to the plane of motion in which all forces applied to the links act. Since the release mechanism of the solar array panel works in zero gravity conditions, the weight forces of the mechanism links in the calculation are not taken into account. Power calculation is performed taking into account accelerated movement of links. Failure to take inertial loads into account in the calculations of most modern mechanisms can lead to significant errors. Accelerated movement of links is taken into account by the method of kinetostatics.

Conclusion

In this work, a mechanism for releasing a solar array panel is designed. For this mechanism, a study of its movement under the influence of given forces and power calculation was carried out.

The kinematics of the planetary mechanism was also designed and investigated. According to the given gear ratio and scheme, the numbers of teeth satisfying the conditions of the gear ratio, neighborhood, coaxiality and assembly were selected.

According to the initially given numbers of teeth, involute gearing was developed. With the help of computers, geometric parameters of offset engagement were calculated.