Bearings , pinion , counter shaft

@freak16-XgiLj6 • Oct 14, 2024

Oct 14, 2024

911

I have problems in getting the concepts related to slow speed mill Pulverizers : Ball mill or tube/drum mill type. They are using reduction gear box single stage and has cooling coils of water to cool the oil. How will it be arranged and why do we need to make system bulkier?

2) I dont understand why do we need bearings? what are their types? And oil system also for bearing.
3) In the drum mill , they use counter shaft with pinion. It swayed away my head.
Why do we need this arrangement?

Please CEans help me out..

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freak16

@freak16-XgiLj6 • Apr 17, 2011

Also what is half coupling?
ISHAN TOPRE

@ishan-nohePN • Apr 21, 2011

We need bearings to support long shafts so that they do not buckle ( bend in between).

There are many types of bearings. Foot step bearings, simple bearings.

See this image

Image source: #-Link-Snipped-#

Let us wait for others else I will answer all the above questions.
yadavundertaker mohit

@yadavundertaker-0p3HBs • Apr 22, 2011

basically we use bearings to support the rotating shafts because if we directly support the shaft in a hole then due to the friction maximum power will be lost and handling of shaft will become difficult. So we need such an arrangement which can hold the shaft and also support the rotating motion without much loss in power transmission.
ISHAN TOPRE

@ishan-nohePN • Apr 22, 2011

Yup I agree with Yadavundertaker. We can also use self lubricating bearings, made by the use of powder metallurgy. They are actually common.

We can also use bush between bearing and shaft which is used as a sacrificial material. When the bush is worn out by friction, we can replace it. Actually it is easy. 😀