The method of balancing a rotor of a centrifugal machine

 

(57) Abstract:

The invention relates to mechanical engineering and can be used in the manufacture and balancing of rotors of such machines, such as centrifugal pumps and compressors. The method of balancing a rotor of a centrifugal machine, containing the thrust nut and locknut, coaxially with the axis of the rotor, is to measure the value and direction of the imbalance and the elimination of unbalance of the rotating unbalanced elements (screws and nuts). Locknut and nut are performed with the same imbalance sufficient to eliminate the possible initial imbalance of the rotor in the plane of installation. The angular orientation of the screws is made by setting to the ends of the spacers of the required thickness. The invention is aimed at simplifying the balancing process in the manufacture and maintenance of the rotors. 1 Il.

The invention relates to the field of engineering, namely technology rotors, and can be used for rotor balancing machines, for example, centrifugal pumps, compressors.

There is a method of balancing a rotor, consisting in the elimination of certain imbalance correction weight the correction (see, for example, GOST 22061-76 "Machines and technological equipment. System accuracy class balancing", page 35).

The disadvantage of this method is the complexity and high complexity of balancing due to the need for improvements in the structure of the rotor parts (often made of hard materials).

There is a method of balancing a rotor assembled structure by rotation of the disks relative to each other (see Leviticus M. E., Ryzhenkov, C. M., Balancing of parts and components. M., engineering, 1986, - S. 175), taken as a prototype.

The disadvantages of this method is the difficulty of balancing rotors of centrifugal compressors: high working frequency of rotation of the rotors causes the need to use reliable drive connection with the rotor, for example landings with an interference fit (press landings) that causes the difficulty of repeated rotation of the disks in case of discrepancy between the calculated imbalance obtained or change the value of the imbalance in the process of the rotor. In the case of threaded connections (coaxial to the axis of rotation of the rotor there is a problem fixing the angular position of the disks relative to each other to provide the necessary axial activity resistant to the end surface of the rotor, and nuts, is that cutting the threaded surface of the rotor must be performed with respect to the angular orientation of the beginning of the chamfer relative to the thrust end surface of the rotor.

The technical purpose of this invention is to simplify the process of balancing the rotor in its manufacture and maintenance, reducing the complexity of the process.

The technical result is achieved in that in the method of balancing a rotor of a centrifugal machine, containing the thrust nut and the lock nut, which consists in measuring the value and direction of the imbalance, the elimination of unbalance of the rotating unbalanced elements (screws and nuts), the latter performed with the same imbalance sufficient to eliminate the possible initial imbalance of the rotor in the plane of their installation, and their angular orientation is performed by setting them to the ends of the spacers of the required thickness.

The drawing shows a fragment of the rotor being balanced, and where indicated: 1 - shaft 2 - thrust nut, 3 - strip, 4 - lock nut.

When installing the thrust nuts 2 and nuts 4 to the end surface of the rotor "And" their imbalances oriented poet, to alter the angle of imbalance nuts 2 and 4 by moving the thrust end surface And along the axis of the rotor by mounting strips 3. Strip 3 is made of a certain thickness, which is necessary to move the thrust end surface "A" to change the angular orientation of imbalances nuts 2 and 4 with respect to the initial position of the surface "A".

To implement the process measured values and the vectors imbalances of the rotor without nuts 2 and 4 in the planes of their installation one of the known methods. The calculated or experimentally find the angular position of the nuts 2 and nuts 4 on the shaft 1, in which the value of the imbalance will not exceed allowable values. Measure the distance between the end thrust surface of the rotor and the end face of the nut 2, between the ends of the nuts 2 and nuts 4 in each plane of correction. Make strip 3 of the required thickness. Mounted on the shaft 1 of the rotor nuts 2 and nuts 4 with spacers 3, tightening them until they stop.

Thus, the use of the proposed method will simplify the process of balancing the rotor in its manufacture and maintenance, to reduce the complexity of the process.

otara, consisting in measuring the value and direction of the imbalance, the elimination of unbalance of the rotating unbalanced elements (screws and nuts), characterized in that the lock nut and nut are performed with the same imbalance sufficient to eliminate the possible initial imbalance of the rotor in the plane of their installation, and their angular orientation is performed by setting them to the ends of the spacers of the required thickness.

 

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