RU1779464C - Automatic balancing device - Google Patents

Abstract

Usage: the invention relates to mechanical engineering and can be widely used for automatic balancing of spindle units with imbalance. The device for automatic balancing contains corrective (unbalanced) disks 1 and 2, which are mounted with thrust bearings 3 on the spindle 4 and secured by a nut 5. The angular position of the disks 1 and 2 relative to the spindle 4 is fixed using the adjusting screws 6, springs 7 and balls 8 included in the holes on the lateral surfaces of the disks 1 and 2. The braking device of the disks 1 and 2 is made in the form of a hydrostatic support, consisting of two headers 9 and 10. having pockets 11 and inlet channels 12. Peripheral e A surface discs 1 and 2 have a different relief. 1 ill. YO VI CHE 4 O 4 77

Description

The invention relates to mechanical engineering and can be widely used for automatically balancing spindle units with imbalance.

A device is known for automatically balancing the spindle assembly of a grinding machine with two adjustment discs located on the spindle.

In the process of balancing the spindle unit, the correction discs are rotated around the axis of the spindle by means of electric motors and worm gears. The angle of divergence of the correction discs set by the measurement and automatic control system compensates for the imbalance of the spindle assembly.

The disadvantage of this device is the complexity of the design and control system of the balancing process,

The closest is a device for automatic balancing of spindle assemblies, equipped with three corrective disks, the rotation of which around the axis of the spindle is carried out due to the braking forces of the disks by friction, hydraulic, pneumatic or electromagnetic devices. Balancing using this device is carried out by random search using a sensor for measuring the vibration amplitude of a spindle operably coupled to a braking device.

The disadvantage of this device is the instability of the balancing process, since the braking device acts on the corrective (for the purpose of mx rotation by commands from the sensor) one-sidedly, which leads not only to rotation of the disks, but also to the emergence of unbalanced forces and, as a result, to displacement of the spindle in the radial direction. In turn, this forms a new signal from the vibration sensor to the brake device, after which the process of finding the balance state is repeated.

The purpose of the invention is to increase the reliability of an automatic balancing device.

The goal is achieved in that the disk braking device is made in the form of a symmetrical hydrostatic support, consisting of two (or more) oppositely mounted segmented headers, mating with the correction discs.

Automatic balancing control is carried out by changing the clearance in conjunction hydrostatic support - correction disk with radial

vibration spindle. When the clearance decreases, the disks rotate by braking forces until the imbalance is balanced.

The drawing shows a device for authorization balancing, section.

The device for automatic balancing contains corrective (unbalanced) discs 1 and 2. which

mounted using bearings 3 on the spindle 4 and secured by a nut 5. The angular position of the disks 1 and 2 relative to the spindle 4 is fixed using the adjusting screws 6, springs 7

and balls 8 included in the holes on the lateral surfaces of the disks 1 and 2. The disk braking device is made in the form of a hydrostatic support, consisting of two opposite sections of the segmented headers 9 and 10. The pockets 11 and the supply channels are made in the headers. 12. The peripheral surfaces A of the disks 1 and 2 have a different relief.

The device operates as follows.

When the spindle unit is rotated with an imbalance, the axis of the spindle 4 together with the correcting disks 1 and 2 under the action of centrifugal forces shifts towards unbalance (for example, down), while the gap between the disks 1 and 2 and the sub peak 10 decreases, and the gap between the discs 1 and 2 and the head 9 increases, which leads to the appearance

on the brake force disks, which are significant from the side of decreasing the clearance, on the opposite side they are small, since the clearance is large. When these forces exceed the fixation forces of the disks 1 and 2, the latter rotate relative to each other due to the difference in the braking forces of the disks due to the different relief on the peripheral surfaces A of the disks. When the correction discs reach a position in which the workpiece imbalance is balanced, the displacement of the axis of the spindle 4 and of the discs 1 and 2 decreases, and the hydrostatic clearance increases. When the clearance d increases, the value of the braking forces decreases and does not exceed the disk fixing forces, which ensures a constant angular position of the correction disks 1 and 2 during rotation of the balanced spindle

5 knots

(with how the amplitudes of the controlled radial vibrations of the spindle are small (they are hundredths of a millimeter), and the revolving speed of the spindle is large, the pressure in

Claims (1)

the mana 11 of both substates varies significantly. As a result of this, the pressure-device for automatic balancing of fluid for correcting discretes, containing corrective disks on the side of opposite pockets, intended for placement on almost identical ones. The effect of the example-5 spindle with the ability to rotate, the mechanism of the invention lies in the fact that the fixation of the correction discs allows to increase the reliability of the spindle, as well as the balancing device in the automatic braking of the correction discs with the pitch mode due to elimination of squeezing characterized in that, with the spindle during a force action on the core-10, in order to increase the reliability of work, eliminating discs and simplifies the system, the braking device is made in the form of hydraulic control lansing due to the static support, consisting of two exceptions of the vibration measuring sensor and oppositely located segment-functional communication of the sensor from the device auxiliary braking devices.