Shaft Mounted Reducer Torque Arm Reaction and Pulley Shaft Load
A shaft mounted reducer places three different loads on the pulley shaft. The torque applied to the shaft is shown on Page No. 1 of the printout. Go to Data Input - Global on the Main Menu to see the value.
The weight of the reducer and the direction of the load must be entered by going to Data Input - Overhung Drive on the Main Menu. The reducer weight is always downward at an angle of 270 degrees.
The torque arm reaction also places a load on the pulley shaft. The magnitude and direction of the load must be determined and entered on the Data Input - Overhung Drive page. See the picture below for a typical drive arrangement. The picture is marked up to shown a typical mounting arrangement on the pulley shaft. Click on the picture to see an enlargement.
1. When the troughing belt to be higher in tension than the return. The motor is applying torque to the pulley shaft to drive the conveyor forward.
2. The higher force on the troughing belt causes the drive assembly to load the torque arm anchor in compression in this example.
3. Therefore, the torque arm anchor is pushing down on the conveyor frame at 270 degrees.
4. The reaction on the pulley shaft is equal and opposite, or upward at 90 degrees. Enter 90 degrees in the program for the torque arm reaction force on the pulley shaft.
5. The magnitude of the reaction is the torque given in PRO-BELT pulley program Page No. 1 divided by the arm length.
6. The weight of the drive on the shaft is always downward at 270 degrees.General Rule
The torque arm reaction force on the pulley shaft is upward at 90 degrees when the vertical torque arm link is on the side toward the tail pulley. This rule applies for a reducer mounted on either side of the pulley.
The torque arm reaction force on the pulley shaft is downward at 270 degrees when the vertical torque arm link is on the side toward the discharge chute. This rule applies for a reducer mounted on either side of the pulley.
Other arrangements must be analyzed on an individual basis.
When in doubt about the direction of the torque arm reaction on the pulley shaft it is always safe to assume the torque reaction is down at 270 degrees because it is added to the reducer weight by the program. Any error in the assumption of the direction of the torque arm reaction is conservative. The shaft will just be a little larger than if the true correct direction on the pulley shaft were entered.
Please call our office for further assistance at 303 - 927 - 6937.
users technical support answers.
Printing PRO-BELT Reports to an Adobe Acrobat PDF File.
Converting PRO-BELT Reports to a "Rich Text File" or Document.
Converting PRO-BELT Graphics Data Page to a Rich Text File or PDF.
Printing on a local printer attached to the computer!
Printing on Windows 2000 and XP to a USB or Wireless Printer!
Printing on WINDOWS NT, 2000 and XP Network Printers!
Printing on WINDOWS 95 and 98 Network Printers!
Hardlock key is not found by computer!
Shaft Mounted Reducer Torque Arm Reaction and Pulley Shaft Load.
Calculating Tangent Dimensions for Concave and Convex Vertical Curves.
Professional Designers & Engineers, Inc.
Kent R. Rieske, President
P. O. Box 11380
Boulder, CO 80301 USA
|
|
Tel: 303
- 927 - 6937 |
|
