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Τι (ποιος) είναι thrust collar - ορισμός
PARTICULAR TYPE OF ROTARY BEARING
Thrust ball bearing; Thrust bearings; Thrust ball bearings; Ball thrust bearing; Ball thrust bearings
thrust
![fighters]] both.](https://commons.wikimedia.org/wiki/Special:FilePath/Engine.f15.arp.750pix.jpg?width=200 "fighters]] both.")
FORCE WHICH EXPELS OR ACCELERATES MASS IN ONE DIRECTION
Thrusting; Thrusts; Thrusted; Vacuum thrust; Centre of thrust; Excess thrust; Thrust (physics)
I. v. a.
Push, drive, impel, force, clap, poke, shove.
II. v. n.
Make a thrust.
III. n.
1.
Push, shove, pass, stab, allonge, lunge, tilt.
2.
Assault, attack, charge.
thrust
FORCE WHICH EXPELS OR ACCELERATES MASS IN ONE DIRECTION
Thrusting; Thrusts; Thrusted; Vacuum thrust; Centre of thrust; Excess thrust; Thrust (physics)
I
n.
1) to make a thrust
2) a thrust into
II
v.
1) (d; tr.) to thrust at (she thrust the money at me)
2) (d; tr.) to thrust into (she thrust the money into my hand)
3) (misc.) to thrust one's way through a crowd
thrust
FORCE WHICH EXPELS OR ACCELERATES MASS IN ONE DIRECTION
Thrusting; Thrusts; Thrusted; Vacuum thrust; Centre of thrust; Excess thrust; Thrust (physics)
(thrusts, thrusting, thrust)
1.
If you thrust something or someone somewhere, you push or move them there quickly with a lot of force.
They thrust him into the back of a jeep...
= shove
VERB: V n prep/adv
•
Thrust is also a noun.
Two of the knife thrusts were fatal.
N-COUNT
2.
If you thrust your way somewhere, you move there, pushing between people or things which are in your way.
She thrust her way into the crowd...
= push
VERB: V way prep/adv
3.
If something thrusts up or out of something else, it sticks up or sticks out in a noticeable way. (LITERARY)
An aerial thrust up from the grass verge...
A ray of sunlight thrust out through the clouds.
VERB: V adv/prep, V adv/prep
4.
Thrust is the power or force that is required to make a vehicle move in a particular direction.
It provides the thrust that makes the craft move forward.
N-UNCOUNT
5.
The thrust of an activity or of an idea is the main or essential things it expresses.
The main thrust of the research will be the study of the early Universe and galaxy formation...
N-SING: adj N, usu N of n
6.
Βικιπαίδεια
Thrust bearing
A thrust bearing is a particular type of rotary bearing. Like other bearings they permanently rotate between parts, but they are designed to support a predominantly axial load.
Thrust bearings come in several varieties.
- Thrust ball bearings, composed of bearing balls supported in a ring, can be used in low thrust applications where there is little axial load.
- Cylindrical thrust roller bearings consist of small cylindrical rollers arranged flat with their axes pointing to the axis of the bearing. They give very good carrying capacity and are cheap, but tend to wear due to the differences in radial speed and friction which is higher than with ball bearings.
- Tapered roller thrust bearings consist of small tapered rollers arranged so that their axes all converge at a point on the axis of the bearing. The length of the roller and the diameter of the wide and the narrow ends and the angle of rollers need to be carefully calculated to provide the correct taper so that each end of the roller rolls smoothly on the bearing face without skidding. These are the type most commonly used in automotive applications (to support the wheels of a motor car for example), where they are used in pairs to accommodate axial thrust in either direction, as well as radial loads. They can support greater thrust loads than the ball type due to the larger contact area, but are more expensive to manufacture.
- Spherical roller thrust bearings use asymmetrical rollers of spherical shape, rolling inside a house washer with a raceway with spherical inner shape. They can accommodate combined radial and axial loads and also accommodate misalignment of the shafts. They are often used together with radial spherical roller bearings. Spherical roller thrust bearings offer the highest load rating density of all thrust bearings.
- Fluid bearings, where the axial thrust is supported on a thin layer of pressurized liquid—these give low drag.
- Magnetic bearings, where the axial thrust is supported on a magnetic field. This is used where very high speeds or very low drag is needed, for example the Zippe-type centrifuge.
Thrust bearings are commonly used in automotive, marine, and aerospace applications. They are also used in the main and tail rotor blade grips of RC (radio controlled) helicopters.
Thrust bearings are used in cars because the forward gears in modern car gearboxes use helical gears which, while aiding in smoothness and noise reduction, cause axial forces that need to be dealt with.
Thrust bearings are also used with radio antenna masts to reduce the load on an antenna rotator.
One kind of thrust bearing in an automobile is the clutch "throw out" bearing, sometimes called the clutch release bearing.
