Test "Rolling bearings"

1. According to what parameter of the shaft is the size of the rolling bearing preliminarily selected from the reference book?

According to the load acting on the shaft Shaft speed Shaft stub diameter Shaft strength.

2. The gearbox uses a worm gear.

Calculation scheme of the worm wheel shaft.

What bearings are needed for the transmission shafts?

Thrust bearings Thrust bearings Radial roller bearings Angular contact bearings

3. The single-stage gearbox uses spur gears. Recommended as supports…

thrust bearings thrust bearings deep groove ball bearings angular contact bearings

4. In a single-stage gearbox, a helical pair of wheels is used.

Calculation scheme of the output shaft.

What bearings are needed for the transmission shafts?

Thrust bearings Thrust bearings Radial roller bearings Angular contact bearings

5. Bearings are used for…

weight reduction power increase ease of assembly bearing of rotating shafts and axles

6*. Calculation scheme of the jack screw

What kind of bearings do you need

to use for this screw?

deep groove ball bearings thrust bearings thrust bearings angular contact bearings

7. The most rational way to lubricate the rolling bearings of a gearbox with horizontal shafts at medium loads and speeds is

dipping insertion of solid lubricant watering splashing of oil by gear wheels from the common oil bath of the gearbox

eight*. In what cases are plain bearings used as shaft supports, and not rolling bearings?

If the shaft is subjected to shock loads If the shaft works in sea water If the bearing efficiency should be at least 0.98 If the bearing is to be split

nine*. Name the possible causes of failure of rolling bearings.

Separator rupture Chipping of raceways and rolling elements Wear of treadmills and rolling elements Liner wear

10. The main characteristics of the rolling bearing are:

large axial dimensions, high permissible speeds and shock loads small axial dimensions, high efficiency, low consumption of non-ferrous metals small radial dimensions, low steel consumption low contact voltage, low noise

11. Among rolling bearings of the same size, the following have the highest radial load capacity:

radial roller thrust ball radial ball thrust roller

12. In the design of the bearing assembly of the gearbox, it was decided to use a lip seal, for this a lip should be used …

choose according to shaft diameter calculate for wear resistance construct calculate strength

13 The main purpose of a rolling bearing is

reducer torque increase reduction gear power increase ease of assembly reduction of friction in the bearings of rotating parts

14. As a result of long-term operation in conditions of good lubrication and absence of shock loads, rolling bearings should fail due to

Separator rupture splitting rings abrasive wear fatigue spalling

15. Bearing in fig. And it is designed to perceive the load … and is called …

only radial; radial roller radial and one-sided axial; roller angular contact only axial; persistent radial and small axial; ball radial

Rice. A Fig. B Fig. C Fig. D Fig. D Fig. E

16. Bearings in fig. B are designed to take the load … and such a bearing is called:

only radial; radial roller radial and one-sided axial; roller angular contact only axial; persistent radial and small axial; ball radial

17. Bearing in fig. B is designed to take the load … and is called …

radial only…radial roller radial and one-sided axial … ball angular contact only axial…thrust radial and small axial… ball radial

18. Bearing in fig. G is designed to take the load … and is called …

only radial; radial roller radial and one-sided axial; ball angular contact only axial; persistent radial and small axial; ball radial

19. Bearing in fig. D is designed to take the load … and is called …

only radial; radial roller radial and one-sided axial; ball angular contact only axial; persistent radial and small axial; ball radial

20. To adjust the clearances in the bearings of the worm shaft (in a single-stage worm gearbox in the figure (see body parts), use the following parts:

liners metal gaskets pins dowels

21. The main technical characteristics of a rolling bearing, which are indicated in catalogs and reference books, are:

fatigue strength and yield strength resources in million revolutions and hours static and dynamic load capacity equivalent load and durability

22. The probability of non-destruction, which is included in the calculations of rolling bearings for general purpose machines, is equal to

23. In fig. And the rolling element of the bearing is

roller conical cylindrical roller needle roller spherical roller

24. In fig. E product, which is called

roller conical cylindrical roller needle roller spherical roller

25. The main feature of the bearing in fig. E is

the ability to work with significant axial loads high efficiency the ability to work with significant loads in all directions the ability to work with a significant misalignment of the rings

Be First to Comment

Leave a Reply

Your email address will not be published.