Crane on column with upper turning mechanism

Contents

Contents

Paper

Introduction

I. Calculation of crane lifting mechanism on the column

1. Electric motor selection

1.1. Calculation of operating time

1.2. Lifting force

1.3. Electric motor power

1.4. Angular velocity

2. Calculation of the cable-block system

2.1. Analysis of polyspast diagrams

2.2. Maximum tension of rope running into drum

2.3. Rupture force of rope as a whole

3. Drum calculation

3.1. Drum diameter based on built-in motor arrangement (mm)

3.2. Drum diameter based on rope strength condition

3.3. Calculation of drum length

3.4. Condition of the drum placement on the electric motor

4. Gearbox calculation

4.1. Calculation of the angular speed of the drum (rad/s)

4.2. Gearbox gear ratio calculation

4.3. Module of the first stage m

4.4. Calculation in "Reducer" program

4.5. Minimum value of gear box axial distance by strength condition

5. Calculation of dimensions and metal capacity (weight) of steel

5.1.Gearbox height

5.2. Gearbox width

5.3. Gearbox length

5.4. Weight of reduction gear box

5.5. Mass of electric motor

5.6. Drum weight

5.7. Comparison of calculation results

6. Tali Layout

II. Calculation of the turning mechanism

1. Counterweight and Column Calculation

1.1. Weight of cargo and tali

1.2. Weight of counterweight

1.3. Moment bending column at nominal load

1.4. The bending stress at the bottom of the column can be determined based on the strength of the column

2. Calculation of bearings of support-rotary device

2.1. Thrust Bearing Reaction

2.2. Distance between radial bearings

3. Layout of support-rotary device

4. Calculation of the rotation mechanism

4.1. Moment of resistance to crane turning during start-up

4.2. Motor power during start-up

5. Definition of preliminary masses

III. Calculation of the movement mechanism

1. Determination of preliminary mass of trolley

2. Selection of running wheels

3. Calculation of movement resistance

4. Electric motor selection

5. Gearbox selection

6. Traction margin factor of drive running wheels with rail at start-up

Level of standardization and unification

Conclusion

List of literature used

Appendix A

Paper

The course design contains 5 sheets of drawings of A1 format, a calculation explanatory note for 41 s, including 2 Fig., 9 Table, 21 literary sources, 1 Appendix.

The purpose of the work is to design a crane on a column with an upper turning drive with a carrying capacity of 1.6 tons. For this, lifting and turning mechanisms were calculated.

For lifting to a height of 6 m, an electric steel with a carrying capacity of 1.6 tons and a lifting speed of 0.1 m/s was calculated .

AIR80A4 engine with built-in electromagnetic brake is selected for turning mechanism. Rated electric motor power. A reduction gear was also selected - 7MCH2-M-70/150. Worm gears are used there, it is required to provide high transmission power at small dimensions and weight of the drive, high kinematic accuracy, reliability and durability.

The lifting mechanism and the turning mechanism turned out to be compact and high-performance, which allows the most profitable and efficient use of the crane.

Introduction

The purpose of course design is to acquire skills in making independent design decisions, assimilate the sequence of development of general-purpose mechanisms, and consolidate educational material on the calculation of standard mechanisms.

The task of the project is to develop a mobile boom crane.

The crane consists of a lifting mechanism, a turning mechanism and a metal structure.

Lifting mechanism: the drum of the lifting mechanism was designed in accordance with the specification sheet. The electric motor was selected by the power and speed of the motor shaft. The gearbox was selected according to the gear ratio. The clutch was selected by torque. The brake was selected according to the braking torque.

Turning mechanism: running wheels were selected in accordance with the sheet of specifications. The electric motor was selected by the power and speed of the motor shaft. The gearbox was selected according to the gear ratio. The clutch was selected by torque. The brake, due to the small value of the braking torque, is built into the electric motor.

The welded steel structure, made of sheets and metal profiles, was designed in accordance with the sheet of specification, namely, in accordance with the layout of the lifting and turning mechanism.

As a result of the work, a crane should be obtained on a column with an upper turning drive, consisting of a lifting mechanism, a moving mechanism, and a metal structure.

Calculation of crane lifting mechanism on the column

Task: design crane lifting mechanism on the column

Given: lifting capacity m = 1.6 t, lifting speed V = 0.1 m/s, lifting height H = 6 m, loading mode L1 light, mechanism classification group according to - M5, according to ISO 4301/1, Z1 = 13

Level of standardization and unification

Standardization: GPM sheet 082.02.00.000 VO used the following standard products: electric motor, reduction gear box, coupling, bolts, nuts, washers, cuffs, bearings, gaskets, washers, covers, metal profiles. Standardization: GPM sheet 082.03.00.000 VO used the following standard products: bearings, bolts, washers, pins, nuts, metal sheets. For the purpose of unification, all metal pipes have the same metal sheet thickness. The plates have the same width and length.

The following standard items are used on GPM sheet 082.01.00.000 VO: electric motor, reduction gear box, couplings, brake, bearing housing, bolts, screws, nuts, washers, collars, bearings, gaskets, washers, studs, covers, pins, metal sheets.

Conclusion

During the work on the course project, knowledge of the calculation methods of typical general-purpose mechanisms was fixed, decision-making skills were obtained in the layout of the mechanism for lifting, turning and calculating the steel structure of the crane.

The necessary calculations for the lifting mechanism, turning mechanism and steel structure of the crane were designed and carried out.