Table of Contents
What is the procedure used for the alignment of shaft?
Rim and Face alignment method are oldest method used for shaft alignment of misaligned equipment/shaft. In this method two dial indicator ( rim and face dial ) are used to determine the relative position of movable shaft with respect to stationary shaft.
How many steps are there in shaft alignment?
Shaft alignment steps Shaft alignment involves the following three steps. The steps are the same regardless of how big or small the rotating equipment is. Step 2. Measure the amount the equipment needs to be moved (the amount of correction).
Which is the most accurate method of coupled shaft alignment?
For most of us, laser alignment is considered the most accurate and effective. But shaft alignment can be done with reverse dial indicator sets, or dial indicators and chain-type brackets, or a straightedge, feeler gauge, and an outside caliper.
How do you measure a shaft alignment?
Alignment is achieved by moving the front and/or back feet of one machine up, down, and sideways, until the shafts are aligned within required tolerances. The alignment sensors measure the position of the shafts compared to the centerline.
What are the three types of misalignment?
The main types of misalignment are angular, radial, and axial displacement.
How many types of shaft alignment are there?
two types
There are two types of misalignment: offset or parallel misalignment and angular, gap, or face misalignment. With offset misalignment, the center lines of both shafts are parallel but they are offset. With angular misalignment, the shafts are at an angle to each other.
How is misalignment calculated?
To determine angular misalignment, divide the coupling gap difference by the diameter of face dial indicator travel. Example: The face indicator is set to zero at 3:00. The indicator is rotated 180 degrees to 9:00. The face indicator reads 10 mils (.
What are two types of misalignment?
There are two types of misalignment: offset or parallel misalignment and angular, gap, or face misalignment. With offset misalignment, the center lines of both shafts are parallel but they are offset. With angular misalignment, the shafts are at an angle to each other.
What is the first step of alignment?
Yet neither can succeed without the other. The first step in alignment is recognizing these differences and incorporating them into the company’s operational philosophy.
Why is shaft alignment important?
While misalignment has no measurable effect on motor efficiency, correct shaft alignment ensures the smooth, efficient transmission of power from the motor to the driven equipment. Incorrect alignment occurs when the centerlines of the motor and the driven equipment shafts are not in line with each other.
How accurate is the fit of the coupling on the shaft?
The accuracy of the fit of the coupling on the shaft is unknown Rotating only one shaft and using dial gauges to measure the opposing coupling surface does not determine the axis of rotation of both shafts. under normal operating conditions The alignment condition can change when the machine is running.
How critical is alignment precision for machines fitted with flexible couplings?
The alignment precision for machines fitted with spacer shafts that have flexible elements at each end is not as critical as for machines that have short flexible couplings installed. Four values are required to fully describe the alignment condition.
Where can I find the coupling alignment fundamentals?
Coupling Alignment Fundamentals Rexnord, 5555 S. Moorland Rd., New Berlin, WI 53151-7953 538-214 Telephone: 262-796-4060 Fax: 262-796-4064 February 2014 August 2013 www.rexnord.com
What is shaft alignment?
A Definition Shaft alignment is the process whereby two or more machines (typically a motor and pump) are positioned such that at the point of power transfer from one shaft to another, the axes of rotation of both shafts should be colinear when the machine is running under normal conditions.