CN201166597Y

CN201166597Y - Shafting dynamic balance experimental bench

Info

Publication number: CN201166597Y
Application number: CNU2008200284198U
Authority: CN
Inventors: 吴芳基; 廖与禾; 屈梁生
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2008-02-29
Filing date: 2008-02-29
Publication date: 2008-12-17
Anticipated expiration: 2018-02-28

Abstract

The utility model discloses a shafting dynamic balance test bench, which comprises a base and an electric motor which is arranged on the base, a rotor, a coupling, a bearing base, a sensor support, an aggravated disc which is installed on the rotor. The test bench is characterized in that the bearing base and the sensor support have corresponding matching surfaces with three positioning surfaces on the base, which guarantees the radial match between the bearing base, the sensor support and the base, the shafting dynamic balance test bench can imitate the disbalance forced vibration of a flexible rotor shafting, can effectively reappear the disbalance phenomenon of the large rotating machinery, and can be used for the researches of the rotor dynamic balance theory and the method, the rotary speed of the test bench, the shifting rigidity, the type of an eddy-current type transducer and the type of the coupling are all adjustable. The test bench has reasonable design, convenient and accurate positioning, smart and beautiful appearance, and the utility model provides an effective and convenient testing means for the vibration testing and the workers who study the balance.

Description

A kind of shafting dynamic balance experimental bench

Technical field

The utility model relates to a kind of experiment table in overall machine vibration monitoring and control field, particularly a kind of shafting dynamic balance experimental bench.This shafting dynamic balance experimental bench can be simulated the unbalance forced vibration of flexible rotor axle system, and the energy imbalance that effectively reproduces large rotating machinery and produced is used for the research of rotor theory of dynamic and method.

Background technology

Unbalance is the modal fault of large rotating machinery, and its processing procedure also is the most complicated in all faults.Through the research and development of many decades, at the balance method of flex rotor spot dynamic balance, can reduce modal balancing method and influence coefficient method two big classes now.Through many scholars' effort, two kinds of methods have all had many improvement.The combined balance system method that Parkinson and Darlow propose, it has made full use of the characteristics that the vibration shape is separated in the modal balancing method on the basis of influence coefficient method.From counterbalance effect, though said method can be realized the desirable balance of rotor, but because the complicacy of flex rotor diversity structure and actual unbalance situation, simultaneously, since the strictness restriction of the position of cycling start number of times, rotor balancing face and vibration measuring point and number, unknown factors such as dynamic performance, axle be spot dynamic balance up to the present still or a kind of examination under the theory guidance gather process.

On the basis of former achievements, development modal balancing method and influence coefficient method continue to explore new transient equilibrium theory and method and have great importance, and this just be unable to do without experimental verification.A kind of efficiently, experiment of dynamic balancing equipment can provide the balance studies worker effectively and easily laboratory facilities easily.At present, U.S. Bently company has produced the dynamic balance experimental bench of single shaft, but is not linked to be the balance test equipment of axle system.Rotor oscillation simulator stand bearing seat and base that domestic east big vibration measuring instrument plant produces are fixed by slide block guide rail, and sensor stand and base are by monolateral screw retention, and bearing accuracy is lower, introduces non-power frequency fault easily, obscures the research to balancing fault.

Summary of the invention

The purpose of this utility model provides a kind of shafting dynamic balance experimental bench, this is the unbalance forced vibration that dynamic balance experimental bench can be simulated flexible rotor axle system, effectively reproduce the energy imbalance that large rotating machinery produced, make things convenient for the scientific research personnel to carry out the research of rotor theory of dynamic and method, save the time and efforts that scientific research personnel's cost is used to arrange experiment.

In order to realize above-mentioned task, the technical solution that the utility model is taked is:

A kind of shafting dynamic balance experimental bench comprises: a base, be furnished with at least two roots rotors on the base, and every roots rotor is supported by two oiliness bearings, and oiliness bearing is installed in the bearing seat; Directly be connected between rotor and the rotor by rigidity, half elasticity or spring coupling; Rotor by shaft coupling by direct motor drive;

Be equipped with on every roots rotor and increase the weight of dish, increase the weight of to coil equal intervals and be distributed with 16 threaded holes, so that by mounting screw simulation unbalance amount; Also be furnished with two sensor support bases on every roots rotor, be used to install current vortex sensor, directly be connected between rotor and the rotor by rigidity, half elasticity or spring coupling;

It is characterized in that, three locating surfaces (A, B, C) on described bearing seat and sensor support base and the base have corresponding mating surface, with the radial fit between guarantee bearing seat and sensor support base and the base, and by the axial restraint between screw guarantee bearing seat and sensor support base and the base.

Shafting dynamic balance experimental bench of the present utility model, the type of its rotating speed, axis rigidity, current vortex sensor type and shaft coupling all can be adjusted.A whole set of experimental facilities is simple in structure, and fitting operation is convenient.The utility model can be simulated the unbalance forced vibration of flexible rotor axle system easily, and the energy imbalance that effectively reproduces large rotating machinery and produced is used for the research of rotor theory of dynamic and method.

Description of drawings

Fig. 1 is a shafting dynamic balance experimental bench structural representation of the present utility model;

Fig. 2 is the radial fit synoptic diagram of bearing guide rail and base rail;

Fig. 3 is the sensor stand synoptic diagram.

The utility model is described in further detail below in conjunction with accompanying drawing.

Embodiment

Referring to Fig. 1, shafting dynamic balance experimental bench of the present utility model, comprise: a base 18, be furnished with at least two roots rotors (6,14) on the base 18, rotor (6,14) is supported by two oiliness bearings respectively, oiliness bearing is installed in respectively in the bearing seat (3,9,11,17), is connected by shaft coupling 10 between rotor 6 and the rotor 14, and rotor 6 connects motor 1 by shaft coupling 2.

Be equipped with on the rotor 6 and increase the weight of dish (5,7), be equipped with on the rotor 14 and increase the weight of dish (13,15), each increases the weight of to coil equal intervals and is distributed with 16 threaded holes, so that by mounting screw simulation unbalance amount;

Are furnished with two sensor support bases (4,8) on the rotor 6, sensor support base is positioned at bearing seat (3,9) inboard, also be furnished with two sensor support bases (12,16) on the rotor 14, sensor support base is positioned at bearing seat (11,17) inboard, and sensor support base is used to install current vortex sensor;

The mating surface of bearing seat (3,9,11,17) and sensor support base (4,8,12,16) and three locating surface A, B of base 18, the form fit of C, to ensure the radial fit between the parts, and ensure axial restraint between the parts by screw, as shown in Figure 2.

As shown in Figure 3, process the threaded hole of φ 5 current vortex sensors totally in sensor support base (4,8,12,16) two row's level, vertical, two rows (Fig. 3 31,33,35 six places), process the threaded hole of φ 8 current vortex sensors in sensor support base two row (4,8,12,16) 45 ° and 135 ° of directions (32 among Fig. 3,34 altogether everywhere), to satisfy two kinds of needs that the model sensor is general.

Shafting dynamic balance experimental bench of the present utility model location is accurately convenient, and the type of rotating speed, axis rigidity, current vortex sensor type and shaft coupling all can be adjusted.

Claims

1. shafting dynamic balance experimental bench comprises: a base, be furnished with at least two roots rotors on the base, and every roots rotor is supported by two oiliness bearings, and oiliness bearing is installed in the bearing seat; Directly be connected between rotor and the rotor by rigidity, half elasticity or spring coupling; Rotor by shaft coupling by direct motor drive;

2. shafting dynamic balance experimental bench as claimed in claim 1 is characterized in that, is processed with the threaded hole of current vortex sensor on the level of described sensor support base, 45 °, the vertical and 135 ° of directions.