Drive with cylindrical gearbox - drawings, design part

Contents

KINEMATIC AND POWER CALCULATION

1.1 Electric motor selection

1.2 Kinematic calculation

1.3 Power calculation

1.1 Kinematic and power parameters of the drive

2 CALCULATION OF CLOSED GEARS

2.1 Service life (life) in hours

2.2 Calculation of high-speed transmission

2.3 Calculation of slow-moving transmission

2.4 Transmission parameters

3 GEARBOX SKETCH ARRANGEMENT

3.1 Shaft structures

3.1.1 High speed shaft

3.1.2 Intermediate shaft

3.1.3Step shaft

3.2 Preselection of bearings

3.2.1 High speed shaft

3.2.2 Intermediate shaft

3.2.3 Slow-moving shaft

3.3 Gearbox wall thickness

3.4 Distances between gear parts

4 CALCULATION OF OPEN TRANSMISSION

5 CHECK CALCULATION OF BEARINGS

5.1 High speed shaft

5.1.1 Radial loads

5.1.2 Equivalent dynamic load

5.1.3 Durability of bearings

5.2 Intermediate shaft

5.2.1 Radial loads

5.2.2 Axial loads

5.2.3 Equivalent dynamic load

5.2.4 Durability of bearings

5.3 Slow-moving shaft

5.3.1 Radial loads

5.3.2 Axial loads

5.3.3 Equivalent dynamic load

5.3.4 Durability of bearings

6 SHAFT CHECK CALCULATION

6.1 Shaft-hub connection

6.2 Attachment of parts against axial movement

6.3 Fatigue Resistance Calculation

7 LUBRICATION, LUBRICANTS AND GEARBOX SEALS

7.1 Lubrication of gears

7.2 Sealing devices

7.3 Lubricants

8 GEARBOX HOUSING PARTS

8.1 Bearing Assembly Covers

8.2 Gearbox cover

8.2.1 Manhole

8.2.2 Attachment and fixing of cover

8.3 Attachment of the gearbox support part to the frame

8.4 Eyes

9 DESIGN OF GEAR ELEMENTS

9.1 Gears

9.2 Pulleys

9.3 Coupling Selection

10 TOLERANCES AND LANDING

CONCLUSION

LIST OF SOURCES USED

7 lubrication. lubricating devices and gearbox sealing

7.1 Lubrication of gears

A crankcase system is widely used to lubricate the gears. Oil is poured into the reduction gear case so that the crowns of the wheels are immersed in it.

Let's choose a variety of oil. The principle for assigning oil grade is as follows: the higher the circumferential speed of the wheel, the lower the viscosity of the oil and the higher the contact pressure in the engagement, the greater the viscosity of the oil. Therefore, the required viscosity of the oil is determined depending on the contact voltage = and the peripheral speed of the wheel = according to Table 11.1/1), we take the kinematic viscosity equal to 50. As per Table 11.2/1/we select the grade of oil for lubrication of gears: I-G-A-46 (industrial oil for hydraulic systems without additives ).

Since it is necessary to immerse the wheels of the intermediate and slow-moving shafts in the oil, the oil level should be within the limits, we take = 70 mm.

7.2 Sealing devices

Cuff seals are applicable for input and output shafts, as per Table 24.26/1/.

For a high-speed shaft with a diameter of d = 28mm, take the cuff 128 × 453 GOST 875279 .

For a slow-moving shaft d = 55mm, take the cuff 155 × 823 GOST 875279.

8 BODY PARTS

8.1 Bearing covers

High speed shaft:

It requires one blind cover and one with opening for cuff seal, select covers according to tables K15/2/and K16/2/.

The dimensions of the cover are determined based on the diameter of the hole in the bearing housing .

Take cover 2172 GOST 1851173 and cover 1172˟28 GOST 1851273, screw covers with screws M825 GOST 149180.

Intermediate shaft:

He needs two blind covers.

Take cover 2172 GOST 1851173, screw covers with screws M825 GOST 149180.

Slow-moving shaft:

It requires one blind cover and one with an opening for the cuff seal. Take cover 21100 GOST 1851173 and cover 11100˟50 GOST 1851273, screw covers with screws M1030 GOST 149180.

Conclusion

In this work, a two-stage cylindrical reduction gear was designed with a gear ratio of U = 17.54 and a torque on the output shaft T = 660 N * m. High-speed gear shaft receives torque from electric motor by means of polyclinear transmission. The torque is transmitted to the intermediate shaft using a spur-shaped cylindrical engagement and further to the slow-moving shaft using a cylindrical helical engagement. The designed gearbox meets the requirements of GOST. All elements of the gearbox satisfy the strength conditions. When designing the gearbox, a large number of standard products were used, as well as parts made according to certain sizes for specific cases. With accurate manufacture, correct assembly and adjustment, the reduction gear box, without breakdowns, will work out the required life. It is recommended to use the manufactured gearbox according to this project in moderate climatic conditions.