It is defined as a procedure by which the mass distribution of a rotor is checked and, if necessary, adjusted in order to ensure that the vibration of the journals and/or forces on the bearings at a frequency corresponding to service speed are within specified limits (ISO 1925).

The procedures of single-channel four-run method are summarized below: a) Take original vibration. b) Add a trial weight to 0° on the rotor and take vibration 

Wind turbine rotor (1) balancing procedure, the wind turbine comprising a rotor (1) comprising at least two blades (2), comprising the following steps: a step of identifying a reference angular position for each of the at least two blades (2); a stage for calculating an unbalance magnitude (mx) of the rotor (1) as a function of a mass (Mit) of each of the at least two blades (2) with respect

Generally, the procedures most commonly used for field balancing utilize only a single balancing plane. [67] or multiple b8.Iancing planes in a trial-and-error 

balancing procedure rotor balancing rotor procedure balancing Prior art date 1992-09-07 Application number IT001865A Other languages Italian (it) Inventor Harald Schonfeld Original Assignee Schenck Ag Carl Priority date (The priority date

A flexible rotor (8) balancing (10) procedure uses test weights provided by actuators (16) driven in accordance with modal balance procedures at different 

The aim of balancing is to reduce the vibration level at the rotational frequency of a rotating machine. This procedure involves improving the distribution of 

A rigid rotor can be balanced at the two end planes and will stay in balance when in service. A flexible rotor will require multi-plane balancing. If a rotor is balanced on a low speed balancing

Rigid rotors can be balanced in two planes, with two-plane balancing usually necessary when the length of the rotor exceeds three times its diameter. Most 

The balancing itself is performed by spinning the rotor and reading the data from accelerometers installed on the supports and the data from a sensor that detects a specific spot on the rotor. The

In principle, all rotor balancing is based on the extrapolation of the influence of a small added mass to the full negation of any initial unbalance. In its simplest form, the process will be, within some tolerable limit, linear. While at first sight this may appear to be an involved procedure, it is readily automated. Simply stated, the

Furthermore, balancing of the rotor is often the stage at which a rotor is approved by the purchaser. Thus, while satisfactory running in-situ is the aim, the 

The detailed balancing method classification is included in [1]. A machine rotor balancing process usually requires production standstill. To reduce the.

development of a balancing procedure which will effectively balance a CT scanner rotating array. Rigid rotor (dynamic) balancing techniques are utilized in 

Rotor Balancing is a type of analysis that compares the vibration profile with the rotation of a mechanical element to characterize inconsistent weight 

Rotor balancing is a fundamental requirement for the smooth operation of procedures usually involve commercial balancing machines based on either the 

rotor is said to be flexible. A rigid rotor can be balanced by making cor­ rections in any two arbitrarily selected i rnr u i A £ Fig. 3. Static balance, couple unbalance planes. I he balancing procedure tor * flexible rotors is more complicated, because of the elastic deflections of the rotor. Fig. 4. Dynamic unbalance O

Balance grades are separated by a factor of 2.5 (G1.0 to G2.5 to G6.3, etc.). ISO Standard 1940 on “Balance Quality Requirements on Rigid Rotors” defines acceptable balance quality grades

Disk-shaped rotors usually can be treated with static balancing. to repeat the balancing procedure to obtain a satisfactory result.

period of any systematic balancing procedure using more than two balancing planes. The first flexible rotors of significance to be built were steam turbine.

Keywords: Balancing, rotor, vibration, influence coefficient, exact point graphical balancing procedure based on a linear rotor system.