Pump alignment formula

Maximize the sweep distance of the face dial indicator for the geometry of the machine being aligned. If the face dial contacts the coupling face directly, ensure the plunger of indicator contacts the coupling near its outer edge. Ensure fixtures are mounted at a position where rotation is possible. It is desirable to have 3degrees of rotation. Motor-Pump alignment is the process of aligning shaft centerlines between a motor and a pump.

The motor is the prime mover, transferring power to the pump by the use of a coupling.

Poor installation and excessive shaft misalignment will substantially reduce seal life. Manufacturers have addressed the problem of poor installation practice by the introduction of cartridge type seals which can be installed with little or no site assembly. View the machine from the pump en zero the indicators on the left, and then rotate and read on the right. Make sure that you always view the pump from the same direction in order for you to keep the left and right directions correct.

PRE- ALIGNMENT BAR SAG VERTICAL MISALIGNMENT HORIZONTAL MISALIGNMENT ALIGNMENT. Proper shaft alignment is not dictated by the total indicator reading (TIR) of the coupling hubs or the shafts, but rather by the proper centers of rotation of the shaft supporting members (the machine bearings). This course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools.

Two methods will be covered: straight edge alignment , and reverse dial (cross-dialing) alignment.

Formula for Face and Rim Alignment Calculation - as Word Doc (.doc), PDF File (. pdf ), Text File (.txt) or read online for free. Windows Tablet-Based Systems. So Easy Even Your Boss Can Do It!

For appropriate applications, the time, expertise and instruments needed to achieve precision alignment (tolerances of less than in) will prevent seal leakage and extend bearing life. It can no more make the alignment for you than the wrench with which you have unbolted the motor. This second edition is the result of over years of hard work and many thousands of hours of writing, testing, retesting, and testing again the alignment related formulas the author has developed on his own. It will make users work much easier and will assist them in making many dollars. Shaft alignment is the act of measuring the relative position of two machines that are coupled and repositioning them so that the rotational axes of the two shafts form a straight line (collinear) when the machines are at normal operating temperatures.

Dial Indicator Alignment. There are two commonly use methods to align rotating machine shafts using dial indicators. When using a rim-face metho one measurement is taken on the rim of the coupling to determine shaft offset.

Another measurement is taken on the face of the coupling to determine shaft angularity. A quick check revealed misalignment of the pump and motor, causing excessive noise and premature bearing wear. Up to of damage to rotating machinery is directly related to misalignment.

Machine vibration, bearing damage, premature seal wear, and coupling damage are all examples of issues pumps experience if improperly aligned at installation. Vertical Condensate Pump Alignment. Alignment were now obtained and the entire measurement process was repeated to obtain a second set of.

The can be averaged together if desire as shown at the bottom of the measurement table in Figure 4. This is done to establish repeatability. ALL pumps should be considered for alignment. To provide an overview of alignment, the discus-sion in this article applies primarily to horizontal centrifugal pumps that are operating in a general service and driven by a separate driver through a flexible coupling on a common baseplate.

The operating temperature of the steel casing is 445°F, and the distance from the centerline to the bottom of the feet is in. The turbine drives an ANSI pump with a. Both casings start up at the same ambient temperature. Compressor Engineering Corporation in the optical alignment fiel until the formation in I9of Bently Nevada Alignment Service Corporation. Campbell has presented several papers.

He is a member of ASME, the Vibration Institute, and the Pacific Energy Association. The pump manufacturer will typically specify the preferred and allowable operating ranges on their performance curve as well as minimum continuous stable flows. The pump driver may consist of an electric motor, vertical gear, or steam turbine that incorporates a vertical solid shaft design mounted on the pump’s discharge head. Alignment of the shaft is necessary when the motor or driven machinery is new or when it is dismantled due to improper running. Moreover, as the name suggests, the main purpose of shaft alignment is to make sure that the center line of the motor rotor shaft coincides with the center line of the driven machinery i. The goal of the alignment process is to create a straight line through the coupling.

Bearings, mechanical seals, packing, and couplings are all directly affected by the alignment of shaft center lines. The two coupled shafts are considered to be perfectly aligned when their center lines are coaxial at the operating condition.