RU69994U1 - DEVICE FOR DYNAMIC BALANCING OF PRODUCTS - Google Patents

Abstract

A device for dynamic balancing of products, contains a frame with supports, vibration-sensing systems with symmetrically located elastic elements in the form of flat spring bands. One end of the elastic elements is fixed motionless on the supports of at least one supporting unit of the bed. The other end of the tape of the same support node is connected to the platform of the rotation motor of the balanced product. There is a balancing mandrel for connecting the rotation motor with a balanced product, an imbalance meter. Each end of the spring tapes has at least one hole made at the same distance from the axis of the balanced product with the possibility of placement on cylindrical pins, rigidly mounted on the supports of the bed and on the ends of the platform. In this case, the device is equipped with a mechanism for securing the ends of the spring tapes to cylindrical pins, the pads of which fix the ends of the flat spring tapes on the bed supports and the ends of the platform. For two holes located at one end of the spring band, one of the cylindrical pins is made with side slices. 2 s.p. f-ly, 3 ill.

Description

The invention relates to balancing equipment and can be used for dynamic balancing of machine components and assemblies.

A device for dynamic balancing of products according to the patent of Russian Federation 2225602 G01M 1/22, 2004, containing a frame with a support mounted on it for a balanced product, two vibration-sensing systems with symmetrically mounted elastic elements, while one end of the elastic elements of the vibration-sensing system is fixedly mounted on the support and the second end of the elastic elements of the same vibration-sensing system is connected to the mounting platform platform for a balanced product. There is a rotation motor, a balancing mandrel, and rotation and vibration sensors connected to an unbalance meter. The device further comprises a platform connected via a swivel connection to the fixed part of the engine, attached to one end of the elastic elements of the second vibration-sensing system, the second ends of these elastic elements are fixedly connected to the bed support, and the balancing mandrel is connected to the shaft of the rotation motor.

Symmetrically installed elastic elements of vibration-sensing systems are made in the form of flat spring bands. Systems on flat spring bands have better dynamic characteristics than other systems, because the resonant frequency slightly depends on the weight of the part being balanced. Their main disadvantage is that they are less technological, and the structural and operational advantages of other oscillatory systems are more significant (Theory and practice of balancing technology. Edited by Dr. Sc. Prof. V. A. Schepetilnikova. Mechanical Engineering, 1973, p. 77.

Known stand for determining the dynamic imbalance of products,

type of driveshafts according to the catalog "Equipment for the determination of dynamic imbalance" of OJSC "NITI-Tesar" model SBS-907. The balancing stand contains installed on the supports of the bed, on flat spring belts of the platform, a balanced product, a rotation drive, a displacement meter. One end of the tapes is fixedly attached to the supports of the bed, and the other to the platform.

The design of the stand for balancing products according to the catalog of OJSC NITI-Tesar model SBS-907 was selected for the prototype (see Appendix).

The known design of fixing the ends of the flat spring tapes allows mutual angular and linear displacements of the axes of the balanced products, the flat springs themselves and the platform, especially when balancing products of significant dimensions and mass. Vibration sensing systems are additionally loaded with the weight of an electric motor mounted on a platform according to patent No. 2225602. Offsets are facilitated by distortions from the cantilever installation on the motor shaft of the mandrel and the product. Finally, mutual displacements are generated by vibrations from the engine and the product during acceleration of the product into the resonance mode and subsequent braking inherent in the used known method of measuring imbalance. The presence of hardened flat spring tapes makes it difficult to use known methods of fixing the mutual angular and linear position of the balanced product, for example, by pinching the ends of the tapes on the supports and ends of the platform. Due to the angular and linear displacements caused by the indicated reasons, and possible deformation of the tapes due to loads, the accuracy of determining the amplitude and phase of the product unbalance decreases, the dynamic advantages of using spring tapes are not realized.

The objective of the utility model is to increase the accuracy of determining the phase and amplitude of the imbalance of the balanced product.

The technical result of this task is achieved by the fact that in the device for dynamic balancing of products containing a frame with

bearings, vibration-sensing systems with symmetrically located elastic elements in the form of flat spring bands, while one end of the elastic elements is fixed motionless on the supports of at least one support node, and the other end of the tapes of the same support node is connected to the platform of the rotation motor of the balanced product, balancing mandrel for connecting the rotation drive to the product, imbalance meter, the following improvements were made. In the proposed device, each of the ends of the spring tapes has at least one hole made at the same distance from the axis of the balanced product with the possibility of placement on cylindrical pins rigidly mounted on the supports of the bed and on the ends of the platform, and the device is equipped with a mechanism for fixing the ends of the spring tapes on cylindrical pins. The mechanism for securing the ends of the spring tapes to the cylindrical pins contains pads, bolts fixing the ends of the flat spring tapes on the supports of the frame and the ends of the platform. In the case of two holes located at one end of the spring band, one of the cylindrical pins is made with side slices.

Figure 1 shows the structural diagram of the device.

In Fig.2 - bed with supports and vibration-sensing system with symmetrically mounted flat spring tapes, view A in Fig.1.

Figure 3 - design of the mounting unit at the ends of the spring tape placed on the stands of the bed and on the ends of the faceplate, view B in figure 2.

The device comprises a frame 1, on which two supports are installed 2. On the frame 1 and on the supports 2, the ends of the flat spring bands 3 are symmetrically fixed, the other ends of which are attached to the platform 4 of the balanced product 5. On the platform 4 there is a rotation motor 6, on the shaft of which using the mandrel 7, a balanced product 5 is fixed. In the devices for balancing the products 5, a rotation sensor 8 is installed on the engine casing 6, and linear displacement sensors 9 are mounted in the platform area 4. The outputs of the sensors 8 and 9 are connected to the imbalance meter nsa

10 (FIG. 1).

On the supports 2 of the frame 1 at the same distance from the axis of the product 5 are pressed in, for example, cylindrical pins 11 and 12 (Figs. 1 and 2). The same pins 13 and 14 are made at the ends of the platform 4. They are placed at a certain distance equal to the axis of the product 5 (FIGS. 2 and 3). The flat spring tapes 3 have corresponding holes 15. The holes 15 are made with the possibility of tightly mounting the ends of the spring tapes 3 and securing them with bolts 16 and pads 17. The lateral surfaces 18 and 19 of one of the pins, for example, cylindrical pins 12 and 14 (figure 3) cut so as to facilitate installation of the ends of the spring bands 3 on the supports 2 of the bed and the faceplate 4.

In devices for balancing driveshafts and rotors, two additional supports are used (not shown in the drawings). They install additional mounting units at the ends of the flat spring bands. The devices for balancing the rotors on the additional two supports have narrow platforms and narrow flat spring bands, so that it is possible to install one cylindrical pin on the supports and ends of the platform.

A device for dynamic balancing of products operates as follows.

Using the balancing mandrel 7, the balanced product 5 is connected to the shaft of the rotation motor 6 and rotated in a known manner to a frequency higher than the oscillation frequency of the platform 4 with the engine 6 and the balanced product 5. The platform 4, mounted on the ends of the plane springs 3 using cylindrical pins 13 and 14, of the strips 17 (Figure 3), during the balancing process it moves, which is detected by the linear displacement sensor 9. After measuring the imbalance components, the power from the rotation motor 6 is turned off, and the product unbalance 5 is eliminated in a separate welding apparatus compensating plates by welding, and a phase weight determined on the location where the described

balancing device.

The advantage of the utility model is to increase the accuracy of determining the phase and amplitude of the imbalance of the balanced product. It is achieved by installing flat spring belts 3 with their holes 15 on the cylindrical pins 11, 12, 13 and 14, pressed into the supports 2 of the bed 1 and on the ends of the platform 4, and securing the ends of the spring belts 3 with bolts 16 and linings 17. Tight installation of the flat spring belts 3 holes 15 on the cylindrical pins 11-14 eliminates the angular and linear displacements of the axes of the products 5 from possible deformations and from the effects of vibrations of the rotation motor 6 installed on the platform 4, as well as from vibrations caused by the acceleration of the products into the resonance mode and after eduyuschim deceleration inherent in the known method used determine the phase and amplitude imbalance.

Claims (3)

1. A device for the dynamic balancing of products, containing a bed with supports, vibration-sensing systems with symmetrically located elastic elements in the form of flat spring bands, while one end of the elastic elements is fixed motionless on the supports of at least one supporting unit, and the other end of the tape is the same the support node is connected to the platform of the rotation motor of the balanced product, a balancing mandrel for connecting the rotation motor to the product, an imbalance meter, characterized in that each of the ends spring tapes has at least one hole made at the same distance from the axis of the balanced product with the possibility of placement on cylindrical pins rigidly mounted on the supports of the bed and on the ends of the platform, while the device is equipped with a mechanism for securing the ends of the spring tapes on the cylindrical pins. 2. The device according to claim 1, characterized in that the mechanism for securing the ends of the spring tapes on the cylindrical pins contains pads, bolts fixing the ends of the flat spring tapes on the supports of the frame and the ends of the platform. 3. The device according to claims 1 and 2, characterized in that for two holes located at one end of the spring band, one of the cylindrical pins is made with side slices.