① like a snail shell-shaped propeller texture of the curve. ② simple machines. Cylinder bore surface and object protruding eyes like a snail shell on the concave thread match, one can rotate so that the two move along the thread. Screws, bolts, screw jacks are all applications in the machinery.
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No. 2
Spiral development
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No. 3
A kind of simple machines inclined plane type, consists of a solid cylinder with a spiral groove and a corresponding groove of the hollow cylinder composed of the same size, plus the force along the groove in which the role of the spiral line, while the role of resistance along the cylinder axis
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No. 4
Like a snail shell-shaped texture of the curve. Tang Xuan Zang "Buddhist Records Bagram test country": "there Tathagata hair, hair color blue Gan, spiral right-ying, cited a long Chi Yu, the volume can be half an inch." Qing Ye Ting Guanxi "If fishing gull Pei * LI Lanqingzi Poetry ":" Pictures of a spiral on the Hin Chuang things to open. "Qin Mu" Flower City fishing and hunting experts praise ":" Seeking Unity, again with the requesting different, so repeatedly sought, such as climbing spiral staircase like, up the stairs. "
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No. 5
Yu twisting things forward. Lu Xun "<Old Topic> Kohiki": "make an issue of a criterion in China, things are still the spiral."
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No. 6
Simple machines. Cylinder like a snail shell on the surface of the thread is called yang spiral, in the eyes of the screw hole objects called Yin spiral. Yin and Yang with two screw up, one can rotate so that the two move along the thread. Spiral in the machine on a very wide application, such as screws, jacks.
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No. 7
Life
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Encyclopedia
luoxuan Spiral screw On a side surface of the cylinder spiral groove mechanical carve. Can also be seen as the slope of the coil wound on the cylinder is constituted, so the application of spiral bevel principle. Characterized the spiral becomes able to rotate or move the opposite flat. In ancient times, people use spiral. Archimedes invented the screw lift up the water from the Nile, is to use the famous Archimedes screw (Figure 1 Archimedes screw). Can be used for transmission and locking screw. The actual shape of the helical thread with various square, triangle, trapezoid, sawtooth, etc. (Figure 2 of a different thread forms), different uses, as the transmission with multiple square threaded screw. From Figure 3 by trying to screw the nut and the nut can be drawn mechanical efficiency spiral: □, where □ suffered axial force to the value of the nut; □ spiral of lead; friction angle between the screw and nut □ is; М suffered as a nut torque value; □ spiral lead angle. Such as the use of spiral to lock objects requires □ ≤ 0, this condition is called self-locking screw. Common screw jack (Figure 4 screw jack) to elect a heavy object, which requires self-locking screw to meet the conditions. Spiral been widely used in the machine tool and a screw to the structure of the drive screw, and various screws and bolts structure of the machine screw to lock. Moreover, screw feeder, screw propeller, etc. are also used in other areas. (Luoyuan Xiang)
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English Expression
: spiral
n.: auger, coiling, helix, screw, turban, volution, worm, screw pinchcock, spiral, either like a corkscrew or flat like a watch-spring