Optimum torque to be transmitted is determined by nominal torque of driven unit and corresponding drive factor of non-driven unit, that is, service factor. Service factor K is referred to below table.
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Choice of Products
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Choice Size of Universal Joint
How to choose TAEKWANG U&T’s Products -
Optimum Torque
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Calculation of maximum torque
Maximum torque by this method must not exceed max torque Td of selected joint size.
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최상 토오크 하중조건 표 Load Condition Application K Continuous Load Centrifugal Pump, Generator (continuous),Conveyor (continuous), Small Ventilator 1.2~1.5 Light Duty Load Centrifugal Pump, Generator (non-continuous), Conveyor (non-continuous), Medium Ventilator, Metal Machining, Wood Machining, Small Paper Mill, Small Fiber Machine 1.5~2.5 Medium Duty Load Pump (multi cylinder), Compressor (multi cylinder) Large Ventilator, Transmission for Vessel, Roller for Fiber and Paper, Roller Table for Conveyor, Rolling Mill For Wire and Rod, Small Pinch Roll, Locomotive Primary Drive Unit, Heavy Duty Fiber Machine 2.5 Heavy Duty Load Compressor (single cylinder), Pump, Mixer, Crane Carrier Bucket Wheel, Rotating Press, Spinning Oil Excavator Locomotive Secondary Drive Unit, Continuous Working Roller Table, Medium Steel Shape Mill, Continuous Steel Mill Volume Steel Mill, Continuous and Volume Steel Tube Mill 3 Extremely Heavy Duty Load Press Roller Drive Unit for Paper, Roller Drive Unit for Corrugated Cardboard, Discontinuous Working Roller Table Drawing Type Slip and Volume Steel Mill, Non-drawing Type Scale Remover, Vibrating Conveyor 4~6
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TORQUE CALCULATION
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In selection of joint size, considering required life time, it is needed to select as per torque calculation that is determined by adjustable factor for continuous torque and working condition.TA = TD · K0 · K1 · K2 · K3
TA = Torque Calculation (kg-m)
TD = Continuous Torque (kg-m)
K0 = Load figure by bearing (1.3~1.5)
K1 = Impact figure
K2 = Life time figure
K3 = Bent angle figure
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K1 Impact figure
If flexible coupling is not used for internal-combustion engine drive, 0.5 is added to K1 value.K1 충격계수 표 Motor Number of cylinder K1 Electric - 1.00 Gasoline engine 4<
1~3
1.25
1.50
Diesel engine 4<
1~3
1.50
2.00
K3 Bent angle figure
In case bent angle is not 3 degree, for required lifetime, corresponding to bent angle figure is applied to it. -
K2 Lifetime figure
5,000 hours based on torque table and other lifetime respectively takes figure of below chart.
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RELATION BETWEEN BENT ANGLE AND REVOLUTION NUMBER
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In the relation between bent angle and revolution number, it is theoretically obvious that mass accelerating moment of middle part must not exceed a certain value, and that has been also approved by results from a lot of use. Mass accelerating moment depends on multiply revolution number by bent angle and mass inertial moment.
If shaft length (Lc) is near 1,500mm, get allowable bent angle in the chart. -
CRITICAL REVOLUTION NUMBER BY BENDING
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Universal joint is flexible and elastic material, and risky revolution number by bending should be inspected. For safety, maximum allowable revolution number is needed to be enough far from risky revolution number.Calculation for critical revolution number by bending
D = out diameter of tube (cm)
d = inner diameter of tube (cm)
Lc= distance between Crosspin (cm)
Allowable revolution number is Max allowable n = 0.65 – critical n (rpm) -
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RELATION BETWEEN CRITICAL REVOLUTION NUMBER AND TK-TYPE LENGTH
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RELATION BETWEEN REVOLUTION NUMBER AND BENT ANGLE OF TK-TYPE
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RELATION BETWEEN CRITICAL REVOLUTION NUMBER AND TS-TYPE LENGTH
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RELATION BETWEEN REVOLUTION NUMBER AND BENT ANGLE OF TS-TYPE
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RELATION BETWEEN CRITICAL REVOLUTION NUMBER AND TKL-TYPE LENGTH
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RELATION BETWEEN REVOLUTION NUMBER AND BENT ANGLE OF TKL-TYPE
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