RU2531158C1 - Procedure for assembled rotor balancing - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used for assembling and balancing of modular rotors of compressors of gas transfer units. According to the method of balancing of the modular rotor the shaft is balanced using the plains of correction unbalances at the ends of the shaft and its coupling and the assembled rotor is balanced, meanwhile the flapping of connecting flanges of couplings with reference to their balancing surfaces are measured, the places of the maximum radial flapping of flanges are determined and marked. Then the marked locations are mated and couplings are joined, the assembly is balanced first with correction of the main vector in the plain of the joint, and then with correction of the main moment of unbalances in plains located near balancing surfaces. After that, couplings are disjoined, the rotor is assembled with arranging of the marked locations in one plain, and it is balanced using the plains of correction of unbalances at the ends of the shaft.

EFFECT: invention is aimed at improvement of precision of rotor assembly.

3 dwg

Description

The invention relates to mechanical engineering and can be used in the assembly and balancing of prefabricated rotors of compressors of gas pumping units.

There is a method of balancing prefabricated rotors described in GOST 31320, in which the shaft and rotor couplings are balanced, the rotor is assembled and balanced after it is connected to the couplings.

This method is taken as a prototype.

The disadvantage of this method is that when balancing the shaft and its couplings, one balancing surface (axis) is used, and after connecting the shaft to the couplings during assembly, others. This leads to large assembly errors due to unacceptably high local imbalances due to the mutual eccentricity of the balancing axes before and after assembly.

The technical task of the invention is to improve the accuracy of the assembly of the rotor.

The technical result can be achieved by using the same balancing axles during assembly of the rotor. To do this, measure the runout of the connecting flanges of the couplings relative to their balancing surfaces. Identify and mark the places of maximum radial runout of flanges. Combining the marked places, they fasten the couplings and balance the resulting assembly unit first with the correction of the main vector in the connection plane, and then with the correction of the main moment of imbalances in the planes located near the balancing surfaces. The couplings are disconnected, the rotor is assembled, placing the marked places diametrically one-sided in one plane, and balance it using the imbalance correction planes at the ends of the shaft.

The symptoms are significant:

- measuring the radial runout of the flange relative to its balancing surface and determining the places of maximum radial runout of each coupling provides the conditions for temporary assembly of the rotor with the uniform position of static imbalances,

- sequential two-stage balancing allows you to correct the static imbalances due to the eccentricities of the installation of the flanges relative to the balancing surfaces of both couplings, to correct the imbalances of the couplings, which minimizes their momentary imbalance,

- balancing the assembled rotor with the correction of local imbalances at the ends of the shaft provides (in total) its four-plane balancing in accordance with GOST 31320.

In the figures indicated:

1 - rotor clutch,

2 - coupling flange

3 - coupling flange,

4 - measuring sensor,

5 - tracking sensor,

6 - balancing weight,

7 - rotor shaft,

A, B - balancing surfaces of the couplings and rotor,

B, G - correction plane of the main moment of imbalances of the assembly unit of couplings,

D, E - plane correction of rotor imbalances,

C is the plane of correction of the main vector of imbalance of the assembly unit of couplings.

The balancing method is implemented as follows.

Install the coupling 1 (Figure 1) on the rotary device. The radial runout of the flange 2 is measured using a measuring device, for example a raster system 3. In this case, the measuring sensor 4 is mounted on the cylindrical surface of the flange, and the tracking 5 on the balancing surface. Such a measurement scheme provides a measurement error to the error of the raster system (1 μm). The maximum measurement indication determines the place of maximum radial runout of the flange and marks it.

Combine the marked places and fasten the coupling 1 (Figure 2) (for example, bolts with nuts). Install the resulting assembly unit on the balancing surfaces A, B and balance with correction of the main vector in the connection plane C (static single-plane balancing), for example, by installing a balancing weight. Then the same assembly is rebalanced with the correction of the main moment of imbalances (dynamic two-plane balancing) in the planes B and D located near the balancing surfaces A and B.

The couplings 1 are disconnected, the rotor is assembled, placing the marked places in one plane, and balance it using the imbalance correction planes D, E (Figure 3) at the ends of the shaft 7.

Thus, the application of the invention improves the accuracy of the assembly of the rotors.

Claims (1)

The balancing method of the assembled rotor, during assembly of which the shaft is balanced using imbalance correction planes at the ends of the shaft and its coupling, balance the assembled rotor, characterized in that the runout of the coupling flanges of the couplings is measured relative to their balancing surfaces, the places of the maximum radial runout of the flanges are determined and marked marked places and fasten couplings, balance the resulting assembly unit first with the correction of the main vector in the connection plane, and then correction torque imbalances in the main planes placed near balancing surfaces disconnect clutch, the rotor was collected by placing labeled places in one plane, and balancing it with planes of correction of imbalances at the ends of the shaft.

Images