SU1462132A1 - Method and apparatus for balancing rotors - Google Patents

Abstract

This invention relates to a balancing technique. The purpose of the invention is to improve safety accuracy by choosing the optimal rotational speed during balancing. The rotor 2 is mounted on the supports of the oscillating system 1, is driven into rotation, and the measurement is the vibration acceleration by the unbalance sensors 3 and 4. The speed is changed until the vibration acceleration in one of the correction planes reaches g, after which the imbalance parameters are measured and the correction is made. In block 8, the speed selection after the acceleration of g is accelerated, one of the comparators 12 or 13 is triggered, via the Or circuit 14, including the memory circuit 17 and the trigger trigger 20, which gives a control signal to the measuring unit 5 and via a two-channel switch 18 - to the block 6 drive controls,; -, 2 s.p. f-ly, 1 ill. with SS (L

Description

The invention relates to balancing equipment and can be used in balancing machines.

The purpose of the invention is to increase accuracy by ensuring the optimal signal-to-noise ratio during measurement and to ensure safety by eliminating ’’ bouncing during balancing. 10

The drawing shows a block diagram | machine tool.

The method is as follows! way.

The rotor is mounted on the supports, brought into rotation, continuously measuring the vibration acceleration on the supports, increase (the rotation speed is increased until the rotor vibration acceleration from! Imbalance reaches the value of acceleration of the free fall g, then stop a further increase in the rotation speed, the imbalance parameters are measured and the rotor unbalance is corrected.

Thus, the measurement is carried out at the highest possible speed of rotation, providing maximum accuracy for measuring the imbalance in the absence of danger to rev. 30 (serving staff.

The machine for implementing the method comprises an oscillating system 1 for mounting the rotor 2, imbalance sensors 3 and 4 mounted thereon, a measuring unit 5 connected to them 35, a drive control unit 6 and a rotation drive 7, and a speed selection unit 8, made in series, connected in series in the form of the first and second vibration acceleration meters 40 9 and 10 connected to the corresponding imbalance sensors 4 and 3, the setting circuit 11, the first and second comparators 12 and 13, the first inputs of which are connected to the outputs of the 45 corresponding vibration meters 9 and 10 acceleration, and the second - with the output of the setpoint circuit 11, connected to the outputs of the comparators 12 and 13 of the OR circuit 14, connected in series by the speed sensors 15, the speed meter 16, the memory circuit 17 and the two-channel key 18, the output of which is connected to the drive control unit 6. rotation generator 19, the output of which is connected to the second input of the two-channel key 18, and a trigger 20, whose input is connected to the output of the OR-14 circuit and the control input of the memory circuit 17, and the output with the measuring unit 5 and the control input of the two-channel key 18.

The machine operates as follows.

The rotor 2 is mounted on the supports of the oscillatory system 1 and the rotor 2 is driven 7. The trigger 20 is initially in the zero state, the input signal from the two-channel key 18 receives the initial frequency signal from the rotation generator 19 and the rotor 2 is accelerated then, until vibration acceleration in one of the planes from the imbalance, determined by meters 9 and 10, reaches the acceleration value 'free fall g, the value of which is set in the setting circuit 11. In this case, the corresponding comparator 12 or 13 is switched, which throws the trigger 20 through the OR 14 circuit and gives the command to remember to the memory circuit 17. From this moment on, the signal corresponding to this speed is received at the input of the drive control unit 6, at which the centrifugal force from the imbalance (the largest of the two) is equal to the rotor casing 2. At the same time, the trigger 20 provides a signal to the measuring device, allowing to measure the imbalance value and proceed to its correction .

Thus, the imbalance is measured at such a maximum possible rotation speed, at which there is no danger for the operating staff, the maximum signal-to-noise ratio is achieved, which leads to an increase in the accuracy of measurement and correction of the imbalance.

The method and the machine is advisable to apply for the correction of deliberately unbalanced rotors, since at the same time achieving the working speed. (with vibration acceleration on supports equal to g), it is faster and possible to increase productivity,

Claims (2)

Claim 1. The method of balancing rotors, * which consists in turning the rotor, changing the rotation speed, measuring the imbalance parameters and balancing, which is characterized by the fact that, in order to improve accuracy and ensure safety, the rotation speed during balancing is chosen from Equal conditions of centrifugal force and rotor weight. · " 2. Machine for carrying out the method of balancing rotors containing conductive 1Q oscillating system for setting the balanced rotor mounted thereon imbalance _sensors; connected to the last measuring unit and sequentially connected 15 control unit and rotation drive, characterized in that, in order to improve accuracy and ensure safety, it is equipped with a speed selection unit made 20 in the form of the first and second vibration acceleration meters connected to the corresponding unbalance sensors , setpoint circuits of the first and second comparators, the first inputs of which are connected to the outputs of the corresponding vibration accelerometer, and the second - with the output of the setpoint circuit connected to the outputs of OR circuit parators, a speed sensor, a speed meter, a memory circuit and a two-channel key, the output of which is connected to the control unit, a rotation generator, the output of which is connected to the second input of the two-channel key, and a trigger, the input of which is connected to the output of the OR circuit and the control input memory circuits, and the output with a measuring unit and a control input of a two-channel key.