How often should pump alignment be checked?

The US Department of Energy suggests the following guidelines for rotating machinery: Check newly installed equipment for alignment changes due to foundation settling after 3 to 6 months of operation. Check shaft alignment of all equipment that is critical to production annually.

How do I know if my pump is aligned?

• With the motor and pump shaft flanges close to each other, but disconnected, mark a spot on each shaft, then measure the separation between them with a feeler or taper gauge.
• Rotate both shafts by about 90 degrees, keeping the marks close to each other.
• How many types of motor alignments are there?

There are two types of misalignment: parallel and angular misalignment. With parallel misalignment, the center lines of both shafts are parallel but they are offset.

## Related Question What is radial alignment?

### What is axial alignment?

An axial misalignment means the two ends of each axis, or shaft, don't meet. They are parallel, but when fully extended, the ends do not come together. This kind of misalignment can also be called an end float because the ends of the shafts “float” but do not connect, meaning they can move in and out.

### What are the three types of misalignment?

The main types of misalignment are angular, radial, and axial displacement.

Also known as “centrifugal fans,” radial fans don't pull air parallel to the axis as axial fans do. Instead, they move air from the center, radially — hence their name. To create the air, radial fans first pull it into the fan. This is often done via a side intake, which varies based on how the size of the fan.

### Is radial the same as axial?

Radial Load is defined as the maximum force that can be applied to the shaft in the radial direction (any direction perpendicular to the motor shaft axis). Axial Load is defined as the maximum force that can be applied to the shaft in the axial direction (in the same axis as or parallel to the motor shaft axis).

### Why would you check for radial and axial play?

A tight radial play is better for low noise, greater rigidity and running accuracy if the load is purely radial. A loose radial play is preferable for high axial loads as it increases the bearing's axial load capacity. It will also better accommodate misalignment between the shaft and housing.

### What is the important of correct alignment of pumps and motor drive?

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 will you complete the alignment of motor?

Proper shaft alignment is achieved by moving the motor. The motor is shimmed vertically to achieve the proper elevation to align it to the pump, both parallel (offset) and angular. The motor is them moved horizontally to achieve proper horizontal placement for aligning the shaft centerlines, both parallel and angular.

### What is RIM and face?

Rim and Face method overview. The Rim-Face method is recognized as the oldest method of shaft alignment. Many different variations of the rim-face method are used, including straight edge and feeler gauge methods, single dial rim-face, two dial rim-face, trial and error rim-face, etc.

### How do you zero a dial indicator?

Rotate the face of the indicator until the "0" marking aligns with the dial. Tighten the knob afterward to lock the face in position. Twist the zero adjustment knob if your dial indicator does not feature a rotating face. Continue twisting the knob until the dial aligns with the "0" marking.

### How do you prevent misalignment of shafts?

Misalignment can be avoided by being attentive during the bearing installation process. The first step is the proper design and machining of the mating housing and shaft components. Housings should be rigid to provide firm bearing support.

### What are the effect of misalignment?

Indications of misalignment in rotating machinery are shaft wobbling, excessive vibration (in radial and axial directions), excessive bearing temperature (even if adequate lubrication is present), noise, bearing wear, and coupling wear. Misalignment can be detrimental in particular to rolling-element bearings.

### How do you test axial misalignment?

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 is parallel misalignment?

Parallel misalignment happens when the two shafts to be aligned have centerlines parallel to each other, but the centerlines are offset. Vertical angle misalignment is a misalignment of two shafts in the vertical plane. Horizontal angle misalignment is a misalignment of two shafts in the horizontal plane.

### How is misalignment measured?

Measurement of Misalignment

By measuring your shaft alignment from different points along the horizontal and vertical planes, you can determine exactly how far out of alignment your shafts are and whether you are dealing with angular misalignment or offset (parallel) misalignment or, typically, both.

### What does misalignment mean in medical terms?

: incorrect or imperfect alignment (as of teeth or bones at a joint) With a large enough area of cartilage loss or with bony remodeling, the joint becomes tilted, and malalignment develops.

### What is thermal growth in alignment?

Thermal growth, as used in the field of machinery alignment means machine frame expansion resulting from heat generation. The generation of heat, of course, is caused by operational processes and forces.

### What is soft foot in alignment?

In his book, Shaft Alignment Handbook, noted alignment expert John Piotrowski defines soft foot as the condition "when rotating equipment is set into place on its base, frame or sole plate, one or more than one of the 'feet' are not making good contact at the foot points of the frame." More generally, the condition is

### What is the flange coupling?

Flange coupling is a sort of connector between turning chutes that have two arrangements of flanges. Flanges are fitted or provided at the end of shafts. The flanges are tightened together by means of a number of nuts and bolts. One of these flanges or chutes is fixed at the end of each shaft.

### Which meter is used for alignment of shafts?

A dial gauge is mounted on each shaft, and the measurement values taken at three different points, corresponding to the 9-12-3 positions on a clock, or the angles 0-90-180 of a circle.

### What does angle of elevation and depression measure?

An inclinometer or clinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity's direction.

### How do radial fans work?

How does a Radial Fan Work? In radial fan, the air hits the fan wheel, turns at the right angle, and is accelerated by radial flat blades on the impeller. The accelerated air is discharged radially, thus, the name. The airflow is induced by the centrifugal force, which is produced in a rotating column.

### Are blower fans better?

Which is better between fans vs air blowers? An air blower provides more powerful direct airflow than a fan. Fans are cheaper to run vs blowers: they're suited to cooling and ventilating larger areas. Use an air blower to target a small space, or a fan for cooling and ventilating a wide area.

### What is radial and axial flow?

“Axial” refers to the direction of flow produced by the impeller. Similar to the axial flow turbine, the term “radial” describes the flow of liquid resulting from the impeller. The radial turbine blades are welded to the hub with the blade surfaces parallel to the shaft.

### What is the difference between axial and centrifugal?

Axial fans and Centrifugal fans comparison. An axial fan is one in which the extracted air is forced to move parallel to the shaft about which the blades rotate. Centrifugal fans extract air at right angles to the intake of the fan, and spin the air outwards to the outlet by deflection and centrifugal force.