LONG-DISTANCE CURVE BELT CONVEYERS

Long-distance Curve Belt Conveyer is convenient and economical,and it does not limit the locale condition.

Due to the linear placement of the common belt conveyer, transport station will be set at the turning point where the conveyer needs to change it`s transmission direction,then the driving equipments will be installed,the more of turning point,the more will be the transport staion and the driving equipments.however the curve belt conveyer can be designed of curve placement according to the landform,by the hands of curve one after another materiel will be carried to it`s destination,no transport station needs to be placed in the middle of a way or distance,not only reduce the investment,but also save the costs of maintenance as well as operation.

The curve belt conveyer software excogitated in our company can accurately figure out the belt tension at any point of curved place,the general design will be done according to the computing data,therefore,the security of material transportation could be guaranteed.

Features of Curve Belt Conveyers

No limit of land form and physiognomy;

Long-distance transportation,farthest several decadal killometres

No midway transport station,material can be carried to terminus directly.

Save investment ,reduce costs of maintenance and operation.

Reduce noises and pollution,will be in favor of entironment protection

Principle Drawing Of Curve Region(as shown in left drawing)

Design Principle Of Curve Belt Conveyers

Before designing the curve belt conveyers,we should Firstly calculate the force on curve inboard which is brought from belt tension and the force on curve outboard which is brought from idler`s placement,the two forces must be balance in the designed area of allowable.(As shown in Drawing)

Project Example

Limestone Curve Belt Conveyer

Designed and Manufactrued in our Co.

Whole Length:10.5 km.

Carrying Capacity:1320 t/h

Curve Location:4

PIPE BELT CONVEYERS

Pipe Belt Conveyers

Pipe belt conveyer can carry out interspace round operation in lesser curvature radius,in this way it can decrease ground occupation and does not limit the landform condition,thereby perform long-distance,large lnclination and close material carrying

Property Of Pipe Belt Conveyer:

Completely close material carrying,the weather will has no influence upon the material and is in favor of environment protection.

Long-distance and curvilinear carry material

Bidirectional and large lnclination carry material

Since it needs more idlers and belt,the pipe belt conveyers will be more investment compare with the common belt conveyers.

The Placement Property Of pipe Belt Conveyer

The advantage:

avoid belt side roll

easy to adjust

convenient for replaceing idlers easy to rebuild

LONG-DISTANCE LARGE INCLINATION BELT CONVEYERS

Long-Distance Large Inclination Belt Conveyers

    Long-distane large inclination belt conveyers have the advantage of large capacity,long distance,few malfunction,low noises and low cost operaion.Therefore it iswidely used in the location of port and mine ect..

    The long-distance large inclination belt conveyers software excogitated in our company with belt width from 500 mm to 2200 mm,belt length from 1 km.to several decadal km. It can exactly figure out the tension of every point on the belt under various working condition,length and inclination.

Project Example

The long-distance large inclination belt conveyer desi-gned and manufactured in our company

Carrying Capacity:2200 t/h

Belt Width:1200 mm

Belt Speed:4.5 m/sec.

Length:2400 m

Lift Alititude:362 m

Carrying Material: iron ore

LARGE CAPACITY UPRIGHT LIFT BELT CONVYERS

    Along with the decrease of ground resource,more and more strict requirement of envionment protection,the project will have to reduce the ground occupation and the environment pollution.Upright lift belt conveyer,a kind of new type cappying equipment is just produced to meet the requirements above mentioned.It can lift mterial uprightly with the maximal lifting altitude of 80 meters and maximal carrying capacity of 4000 tons per hour.It can be used in bulk silo feeding ad the location where the material should be lift uprightly.

    The avantage of Upright Lift Belt Conveyers

    Reduce Ground Occupation                                                          Curtail Carrying Distance

    Low noises,Reduce Environment Pollution                                      Large Capacity Upright Lifting 

Large Inclination Belt Conveyer                                                      Upright Lift Belt Conveyer

Carrying Capacity: 2000 T/H                                                           Carrting Capacity: 4000 T/H

Lifting Capacity: >80M                                                                   Lifting Capacity: 80M

Inclination: 30-90℃

NC LONG LIFE-SPAN AND ENERGY SAVING IDLERS

    In  order to insure the life-span of more than 50000 hours and the rotation resistance factor of less than 0.010,idler`s machining and material selection will be put in practice strictly in accordance with the technical requirements of NC Company.Our products have been used in many national important project such as Cao-Fei-Dian Coal Terminal Project and Jing-Tang Port Coal Terminal Project etc.

Project Example

project example:Cao-Fei-Dian Port,Jing-Tang Port Coat Terminal

Belt Speed:6 m/sec.       

Belt Width:2000 mm                          

Carrying Capacity:7800 t/h

Features of Standard idlers

    Low radial runout:Idlers are made of precision steel pipe to ensure well-balanced rotation.The radial runout of outer ring will be definitely in the area of following:

    Low Rotation Resistance,Energy-Saving:The rotation resistance factor of our idlers stay less than 0.01 though it varies with the roller dia.and bearing bore.However,for the NC idlers,employ simulant friction resistance factor=0.020 for calculation of conveyer drive horsepower in view of other operating conditions involved,for other common idlers,employ simulant friction resistance factor 0.022-0.030 for calculation of conveyer drive horsepower,this shows the advantage of our products in the way of energy-saving.

    Permanent Lubrication:NC idlers are of factory-greassed,seald-for-lifetime,fitted with precision deep-groove ball bearing (with ZZ shields) at both ends,no extra lubrication is required.

Structure of Standard Idlers

    Shaft:Accurate shaft will be made of special machining mechanism

    Pipe:Rollers are made of accurate pipe with state-of roundness and  straightness to ensure well-balanced rotation.

    Ball-Bearing:Optimum fit given between ball bearing,shaft and housing,based upon years of experiience.Ball bearing provided with C3 group of clearance,ZZ shield deep-groove to ensure a nice fit and off-set any expected temperature rise during operation by means of internal clearance.

    Housing:Housing made of deep-drawn material,cast on accurate mould,and will be automatically welded to pipe simultaneity at both sides.Rigid and mono-block structure so produced ensures to make it free from any looseness between pipe and housing or breakage,resultantly provide with satisfactory durability for high-speed conveyer susceptible to expected big impact during operation.

    Labyrinth Seal:The particular labyrinth seal structure excogitated in our company is of non-contact type,and so durable and has less rotation-resistance and long life-span as to be of optimum structure,particularly for a long-distance and large capacity conveyer for bulk material.It is approved from the testing of national authoritative organization and NC Company that Seal employed is of dustproof and waterproof type,whose performance proved to be satisifactory and has by a long way exceeded the GB and JIS standard after our repeated research and development.

Technical Performance Sheet of Standard Idlers

序号No.	项目名称Items	技术特性和性能保证Iechnical Performance
1	使用寿命 Life-Span	正常使用，寿命不小于50000小时，有效使用期内损坏率不超过5% Life-span will be no less than 50000 hours for normal use. and the replacing ratio will be less than 5% during the period of validity.
2	托辊旋转阻力系数 Rotation Resistance Factor	出厂实验室检测Lab test before Leaving factory：≤0.010； 工程使用条件下Load-carrying condition：≤0.020。（动力计算用）: (for calculation of conveyer drive horsepower)
3	托辊外圆径向跳动 Idler Radial Runout of Outside Diameter	≤0.5mm (托辊辊长≤550mm) (Length of Idler≤550mm) ≤0.6mm (托辊辊长＞550－950mm) (Length of Idler＞550－950mm) ≤1.0mm (托辊辊长＞950－1600mm) (Length of Idler＞950－1600mm) ≤1.2mm (托辊辊长＞1600－2400mm) (Length of Idler＞1600－2400mm)
4	托辊轴向位移量 Roller Axial displacement	≤0.5mm (国家标准≤0.7mm) (GB：≤0.7mm)
5	托辊粉尘及进水量 Dust and Water in Roller	辊子在具有粉尘的的容器内连续运转200小时后，粉尘不进入密封润滑脂腔内（国家标准为不进入轴承润滑脂内）。在淋水工况条件下连续运转72小时后，进水量小于5g(国家标准≤150g)。 After 200 hours running operation in a container filled with dust,there will be no dust in seal grease chamber of roller(national standard is:there will be no dust in bearing grease).Aster 72 hours running operation under the operation condition of pouring water.water,the amount of water in seal will be less than 5g(national standard is≤150g).
6	托辊轴向承载能力 Axial Carrying Capacity of Coller	＞15KN
7	托辊跌落试验 Roller Falling test	符合GB10595-89标准 Accord with the Standard of GB10595-89
8	托辊轴承密封件 Bearing Seal	采用日本NC公司专利制造，三弯道长密封腔小间隙腔隙式密封结构，具有优良的防尘、防水性能。 Introduce the patent of NC,is of the labyrinth seal with the structure of 3 curve channels,long seal chamber,small clearance,so have the excellent performance of waterproof and dustproof.
9	托辊轴承 Bearing	托辊轴承采用承载能力大、速度特性好的深沟球轴承（游隙等级采用标准游隙或C3组游隙）。并采用国家名牌产品。 Employ deep-groove ball bearing to ensure the large carrying capacity and reliable speed (employ normal clearance or c3 group of clearance.All bearings used will come from famous manufacturer
10	托辊辊体 Roller Shell	托辊轴体采用高精度托辊专用高频焊管。生产标准高于GB13792-92较高级的要求。钢管的厚度满足强度和刚度要求。 Roller shell will employ high precision welded steel pipe special for roller.The pipe selected is above the higher precision of GB13792-92.The thickness of pipe can entirely meet the needs of intensity and rigidity.
11	托辊轴 Roller Shaft	托辊轴采用高精度冷拔圆钢，尺寸公差和表面质量标准高于GB/T3078-94。托辊轴具有足够的刚度和强度，保证轴的转角≤10`。 High precision cold finished steel bar are employed for roller shaft material,the dimension tolerance and surface quality exceed the stipulation of GB/t3078-94.The roller shaft is of adequate intensity and rigidity to ensure the diversion corner of much less than 10`.

NC FIEXIBLE STRUCTURE PULLEYS

Features of Flexible Structure Pulleys

    Since the development of steet wire belt in the 60 s of the 20th century,belt conveyer has come into the age of large of large capacity and long distance carrying.In order to meet the needs of large capacity carrying,pass through research and test time,we change the pulley from rigid structure to flexible structure.

    The appearance of rigid structure pulleys and flexible structure pulleys is basically similar,but their inner structure is absolutely different.For flexible structure pulleys,flexibility distortion is allowed in the field of allowable stress to absorb partial kinetic energy,relax local stress concentration,and accordingly enhance the whole fatigue intensity of pulleys and extend life-span.It can ensure of more than six years of continuous operation.

Design Essentials of  Flexible Structure Pulleys

    On account of bending moment and torque produced from the running of pulleys,especially the alternant fluctuant loads acting on pulleys,the composition of force put on pulleys is very complicated.Therefore,the fatigue intensity must be accurately calculated during the process of design.

The design emphases of flexible structure pulleys are as follows:

Structure Analysis of Flexible Structure Pulleys

    When the belt tension applies to pulley,each part of the pulley is displaced.Applying NASTRAN software,we can analyze this displacement,calculate the strength of each part of the pulley.

Deformed State of Pulleys(when the Wrap angle is90⁰ )

Stress Distribution of End Disc and ShellProduced from Belt Tension

                                   Grade  A

Stress Distribution of End Disc:the dotted line indicates the inside stress of endDisc,the dotted chain line indicates the outside stress of end disc.

                                   Grade B

Stress Distribution in the Shell Longitudinal Direction:the dotted line indicates stress generated on the untouched surface of belt,the dotted chain line indicates stress generated on the contact surface of belt.

Type Selection Scopes of  Flexible Structure Pulley

带宽mm Belt Width	500－3000
滚筒直径mm Pulley Diameter	∮250－∮2000
滚筒轴承位轴径mm Shaft Dia.at the location Baearing	∮40－∮500
轴承、轴承座 Bearing、Housing	SKF、FAG、NSK、国内知名品牌(根据用户要求) SKF,FAG,NSK and domestic famous brand (base upon the requirement of our customer)

Lagging  Physical Property of Flexible Structure Pulleys

    Lagging of pulleys employ cold-vulcanizing rubber splicing of TIP TOP Company in German,the raw material and production technic are entirely from German.The lagging is of the property of wearable,good anti-aging,high splicing intensity,steady hardness,good elasticity and large frictionfactor etc.,the surface of it has better function of self-cleaning.

Physical Property Co ntrast Table of NC Lagging of Pulleys

项目 Items	NC滚筒 NC Pulley	日本标准 JIS	中国标准 GB
邵尔A型硬度( °) Share hardness, Type A	60±5	60±5	60±10
拉伸强度Mpa Tensile Strength	≥19	≥18	≥18
扯断伸长率% Snapping Percentage Elongation	≥460	≥450	≥180
阿克隆磨耗（Cm3） Acron Wear	≤0.1	≤0.1	≤0.29
橡胶与金属粘附扯离强度（Mpa） Unstuck Intensity of Metal and Lagging	≥12	≥10	≥3.9

Note:In GB,Acron Wear is testing the volume()of wearing rubber after it is worn through 1.61km,the data 0.2 in the sheet is the conclusion translsted from the Standard of JIS

Major Products