Requires system considered rotational selection

Date: 2015-10-07; view: 451.

Task 7. Fill in the gaps using the words from the box bellow:

Basically, three common situations may be encountered in the analysis of a bearing 1)________; bearing-size 2)__________, bearing-type selection, and bearing-life determination. Each of these problems 3)_____________ the following conditions to be known; radial load, thrust load, and speed. The static load capacity is not 4)__________ in the following procedures but should be analyzed if the bearing 5)_________ speed is slow or if the bearing is idle for a period of time.

Task 8. Put these words into the right word order and translate them into Ukrainian :

1) The most common / a locknut / best method of / a shaft shoulder /is / fit against / bearing retention / secured with / and / a press .

2) to the shaft:/ and / common methods/ eccentric locking collar/ attach the bearing/ are used to setscrew,/ Three / taper-sleeve adapter.

3) of the lubricant / of the bearing/ cause heating/ and accelerate / will / the deterioration/ Excess lubricant.

Task 9. Fill in the table using the information from the text:

Task 10. Translate the following sentences into Ukrainian:

1. Normally the rolling elements, balls or rollers, are made of the same material and finished like the rings.

2. Ball bearings function on theoretical point contact and they are suited for higher speeds and lighter loads than roller bearings.

3. Roller bearings are generally more expensive except in larger sizes.

4. Since roller bearings function theoretically on line contact, they will carry heavy loads, including shock, more satisfactorily, but are limited in speed.

5. The empirical X and Y factors in Eq. 3 depend upon the geometry, loads, and bearing type.

6. Sealed bearings have a flexible lip (usually synthetic rubber) in contact with the inner ring.

7. Friction is increased, but more effective retention of lubricant and exclusion of dirt is obtained.

Task 11. Imagine that you are a lecture at the university and you should explained the first-year students the main functions of a bearing and its principle of operation. Try to make your story simple to understand. Write your description using 120-150 words. The following opening phrases may help you.

On the one/other hand … On the whole … As a matter of fact … Fortunately … So …Anyway … Luckily …

In any case ... Unfortunately … By the way …

Actually … You know … You see …