The relationship between the selection of plum blossom elastic coupling and the diameter of the shaft hole

Time: 2012-06-24 07:50 Author: XINLAN Coupling Click:
The relationship between the selection of plum blossom elastic coupling and the diameter of the shaft hole

XNUMX. PlumFlexible couplingSelection of:
  1. Choose an appropriate form: Determine the appropriate type according to the requirements of mechanical characteristics, such as the size of the transmitted torque, rigidity requirements, vibration, impact, acid and alkali corrosion resistance, transmission accuracy, etc.
  2. Calculate the torque
  The maximum torque transmitted by the plum blossom flexible coupling should be less than the allowable torque value. *The determination of large torque should consider the addition or subtraction of torque and over
Load torque.However, when the design data is insufficient, the analysis is difficult, and the maximum torque is difficult to determine, it can be selected according to the calculated torque.That is, the calculated torque does not exceed the allowable torque value.Calculate the torque Tc with the following formula
           Tc=KT T=9550*Pw/n T=7020*Ph/n
  Where T-theoretical torque (Nm)
      K-Select the coefficient related to the coupling.Refer to JB/T7511-94 "Calculation of Mechanical Coupling Selection"
      PW-driving power (KW) PH-driving power (horsepower)
      n- speed (rpm) 
  3. Determine the aperture range (Note: When the diameter of the driving and driven shafts are different, the coupling specifications should be selected according to the large end diameter).
  4. Select the type of shaft hole and key (or expansion coupling sleeve).
  Note: The tolerance of the shaft hole and the keyway is according to the national standard: the tolerance of the cylindrical shaft hole is H7, the tolerance of the conical shaft hole is H8, and the key width tolerance is P9.

  XNUMX. The larger the plum elastic coupling, the larger the shaft hole that can be matched, and the smaller the shaft hole's minimum value.

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