Share the work principle and application of synchronous belt
Synchronous belt with steel wire rope or glass fiber reinforced layer, covered with polyurethane or chloroprene rubber ring belt, belt within weeks made dentate, the toothed belt pulley. Synchronous belt transmission,transmission ratio accurate, the axial force is small, compact structure, oil resistance, abrasion resistance, anti aging performance is good, the general use of temperature of -20 DEG C to 80 DEG C, v<50m/s, P<300kw, i<10,the requirements for synchronous transmission can also be used for low speed transmission.
1 Overview
Synchronous belt drive consists of an inner circumferential surface is provided with a pitch tooth ring belt and the corresponding fit round. It combines the advantages of belt drive, chain drive and gear drive their. Rotate to transfer power, the toothed wheel tooth meshing. Synchronous belt drive transmission dragon has accuratetransmission ratio, non slip, can obtain a constant speed ratio, smooth transmission, vibration absorption, low noise, large range of transmission ratio, generally up to 1:10. Allow the line speed up to 50M/S, transfer powerfrom a few watts to hundreds of kilowatts. The transmission efficiency is high, can reach 98%, compact structure,is suitable for the multi axis drive, no lubrication, no pollution, and therefore can not allow pollution and the workingenvironment is very bad place under normal working. Products are widely used in mechanical transmissionmachine, textile, tobacco, communication cable, light industry, chemical industry, metallurgy, instrument, food,mining, oil, automotive and other industries of various types of.
2 characteristics of synchronous belt
(1) the transmission accuracy, work without slipping, with a constant transmission ratio;
(2) the transmission is steady, with a buffer, damping capacity, low noise;
(3) the transmission efficiency is high, up to 0.98, the energy saving effect is obvious;
(4) easy maintenance, no lubrication, low maintenance cost;
(5) large speed ratio range, generally up to 10, line speed up to 50m/s, with larger power transmission range, up to a few watts to hundreds of kilowatts;
(6) can be used for long distance transmission, the center distance of more than 10m.
The main failure forms of 3 synchronous belt transmission
The belt body fatigue fracture;
The toothed cutting and crushing;
The band, belt, cloth strip tooth wear;
The bearing layer of elongation, pitch increases, the formation of teeth, tooth interference climb;
The impact of overload, so that the belt body fracture.
4 synchronous belt classification
Synchronous belt tooth shaped teeth and arc tooth two kinds, arc tooth has three series: circular arc tooth (H series and HTD band), flat circular arc tooth (S series also known as STPD) and concave parabolic tooth (R series).
Trapezoidal toothed synchronous belt
Trapezoidal toothed synchronous belt sub sided teeth and teeth two kinds of double-sided, single-sided and double-sided tape or band. Double belt according to the tooth arrangement is divided into symmetrical tooth type(DA) and staggered tooth type (DB). Two sizes for trapezoidal toothed synchronous with: pitch system andmodular system. China adopts the pitch system, and according to the ISO 5296 made synchronous belt transmission standard GB/T 11361 ~ 11362-1989 and GB/T 11616-1989.
Arc tooth synchronous belt
Arc tooth synchronous belt in addition to tooth curve shape, and the structure of trapezoidal toothed synchronous belt are basically the same, with the pitch, the teeth, tooth thickness and tooth root fillet radius than trapezoidalteeth. With the teeth after loading, stress distribution is good, smooth the tooth root stress concentration, improve the load carrying capacity of gear. The arc tooth synchronous belt than trapezoidal toothed synchronous belttransmission power, and can prevent the meshing tooth interference. Arc tooth synchronous belt with good wear resistance, small noise when working, no need of lubrication, can be used for dust environment. Has been widely used in food, pharmaceutical, automotive, textile, printing, paper and other industries.
The working principle of 5 synchronous belt:
Synchronous belt drive is composed of an annular belt is an inner peripheral surface is provided with spacing of teeth and tooth belt pulley has the corresponding of the composition, operation, the toothed pulley joggle transfer movement and power, it is a new type of belt drive belt drive, chain drive integrated the advantages of gear transmission. Synchronous belt and synchronous wheel is installed and the matters needing attention: reduce thebelt wheel center distance, such as a tension pulley should be loosened, mounted on the tape and then adjusting the center distance. To drive fixed center distance, should first remove the belt pulley, the pulley on the loaded tape after the belt pulley on the shaft is fixed.
When installation should pay attention to the following points:
The installation of synchronous belt wheel center distance, if the two can be moved, it must first be belt wheelcenter distance shortened, installed after the synchronous belt, and the centre distance reduction. If there is atension wheel, the tension wheel to relax, and then loaded on a synchronous belt, a tensioning wheel. The beltwheel is provided to the synchronous belt, remember not to push too hard, or using a screwdriver pry hardsynchronous belt, to prevent broken phenomenon in the belt tension layer appearance did not perceive. Design ofbelt wheel, the best choice of two mutually close structure, if not allow structure, it is best to put together and belt wheel fitted to the corresponding axis synchronous belt.
The control of proper initial tensioning force.
The synchronous belt drive, belt wheel axis parallel degree is high, otherwise the synchronous belt at work willproduce deviation, even out of the belt wheel. Non parallel axis will cause uneven pressure, with teeth of early wear.
The support frame with wheels, must have enough stiffness, or belt wheel will lock in operation caused by the twoaxis is not parallel.
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