What is phasing a driveshaft?
Phasing is the process of aligning the universal joint yokes on both ends of the drive shaft (or double u-joint)in a parallel fashion. If the joints are not properly phased, they will operate at varying speeds throughout each revolution which can cause second-order vibrations.
What are the signs of a bad drive shaft?
Signs of a bad driveshaft/drivetrain
- Vibrations from under the vehicle. A common symptom of a failing driveshaft is an intense shaking coming from underneath the vehicle.
- Difficulty turning.
- Loud clunking noise.
- Car shudders upon acceleration.
- Squeaking noise.
- Clicking or knocking noise.
What does a 2 piece driveshaft do?
The 2 piece drive shaft (DS) is meant to prevent the drive shaft from pulling out under extreme axle movement. The front of the DS slips into the transmission. The rear of the DS bolts to the rear axle.
What is the yolk on a driveshaft?
A yoke is a device that unites, couples, or connects. As it relates to driveshafts, a yoke is the basic torque input and output component. This type of driveshaft can accommodate both axial and angular motion. The yoke on the left side of Figure 11 is a “Slip Yoke”.
What happens when a driveshaft is out of phase?
If the driveline is left out of phase even the small unfelt oscillations and unbalances will wear on the driveline components and eventually lead to failure. U-joints, transmission output seals, and differential seals will all be placed under the stress of the driveshaft moving up and down.
How do I check my driveshaft balance?
To field balance a driveshaft, raise vehicle parallel to the ground so that the vehicle can be started and the tires and wheels can rotate freely. Measure about six inches from the yoke end, and place four marks 90 degrees apart around the driveshaft. Number them so that they can be identified.
How do I know if my drive shaft needs replacing?
Signs of a bad driveshaft/drivetrain
- Vibrations from under the vehicle. A common symptom of a failing driveshaft is an intense shaking coming from underneath the vehicle.
- Difficulty turning.
- Loud clunking noise.
- Car shudders upon acceleration.
- Squeaking noise.
- Clicking or knocking noise.
Can you drive a shaft with two motors?
You’d have to drive the two motors significantly differently for one to add torque to the shaft while the other is adding drag. This assumes that you don’t have a closed loop controller that is trying to regulate motor speed.
Can a undriven motor slow down a shaft?
The undriven motor will just add a little frictional load to the shaft as long as its electrical connections are left open. As long as you drive each motor hard enough so that it would rotate at that shaft speed with no load, it’s not going to slow anything down.
What happens when you synchronize two motors?
Now, if you’re using some sort of differential and having both motors synchronized (but in opposite directions) then the output on the differential would be zero RPM. If one motor was to slow or speed up it would cause a difference in rotations and the differential would rotate one way or the other.
What are the drive shafts on a CH-47D Chinook?
The Drive Shafting The CH-47D helicopter drive system includes: five transmissions (forward, aft, combining, number one and two engine nosebox), and aft vertical shaft, nine synchronizing shafts (drive shafts), and two engine drive shafts (cross shafts).