51213 牛熊证分析仪| 表现 - 瑞銀- UBS - 51213
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In this way, bearing rings (races), rolling elements and cages all play a role in allowing bearings to function, and it is by combining these functions that bearings can rotate smoothly.
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The race on the side, into which the shaft, is inserted is called the shaft race.The race inserted, into the housing, is called the housing race.
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Bearings aim for stable and smooth rotation, and to do that the friction with rolling motion needs to be reduced and the abrasion of the various components needs to be prevented. This is the job of the "lubricant".
Figure 4 shows two bearings, called "thrust bearings", which support a force applied in the same direction as the shaft.Races are used for these thrust bearings.
In Part 2 we explained how the history of bearings began by using rolling logs to allow for the movement of extremely heavy stones.Figure 1 shows how the "shaft" rotates, causing the rolling elements ("balls" or "rollers") inside the bearing to roll.Bearings reduce friction by means of this rolling motion.
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Have you ever had a plate covered with oil slip out of your hand when you held it? You probably all understand that when there is oil between two surfaces the amount of friction is decreased.
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The surfaces of bearing rings (races) on which the rolling elements roll are made to be extremely smooth, to allow for smooth bearing rotation.
The "rolling bearing", with its rolling motion, reduces friction more than the "plain bearing" with its sliding motion, allowing for a greater decrease in the amount of energy consumption during rotation.
● Rolling elements ... The components that roll between the bearing rings (races); rolling elements can be either "balls" or "rollers"
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In order to prevent this, a cage is put in place to keep the rolling elements separated from each other. This allows them to roll smoothly.
Semi-solid (i.e., like cream) "grease" and liquid "lubricating oil" are both widely used as bearing lubricants.The lubricant also serves to remove the heat that is generated inside the bearing as it rotates, serving to increase the service life of the bearing.For this reason lubricant is an important component in allowing bearings to rotate stably and smoothly.
There are a variety of different types of cage designed to suit the specific conditions of the bearing, such as the strength of the supporting force or the speed of the rotation.
The bearing would be unable to continually rotate stably and smoothly, however, with just these various components.We need now to introduce one more very important component of bearings.
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Bearing rings (races), rolling elements and cages all play a role in allowing bearings to function, and it is by combining these functions that bearings rotate smoothly.
In this way, each component of the bearing serves an important function, allowing the bearing to continually rotate stably and smoothly.
Figure 2 shows two bearings, called "radial bearings", which support a force that is applied perpendicularly to the shaft."Ball bearings" use balls as their rolling elements, which "roller bearings" use "rollers" as their rolling elements.
There are a variety of different rolling elements designed to suit the specific conditions of the bearings, such as the strength of the supporting force or the speed of the rotation.
Modern bearings come in a wide variety of types, but their basic structure is almost identical to that thought up around 500 years ago by Leonardo da Vinci.
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As shown in Figure 5, when the bearing's inner ring rotates this causes the rolling elements to roll. When this happens, unless the bearing has a cage, the rolling elements next to each other will make contact.When their surfaces come in contact, the rolling elements' rolling direction will be inverted relative to each other, and the rolling motion of the rolling elements will be disrupted.
The bearing ring on the inside, into which the shaft is inserted, is called the inner ring.The one on the outside is called the outer ring, and is inserted into the housing* (as seen in Figure 3).