RU2339926C1 - Dynamic rotor balancing machine - Google Patents

Abstract

FIELD: engines and pumps, physics.

SUBSTANCE: balancing machine comprises a bed with props supporting suspensions with flexible elements and those intended for fastening the object to be balanced. The pickups recording the parameters of the rotor being balanced are connected to the control unit connected, in its turn, with the setting device. The flexible elements of every suspension represent round-section rods fitted in the front and rear suspension props. Note here that an intermediate prop is arranged between the front and rear suspension props to move horizontally and to get in contact with the aforesaid rods. Note also that a flat flexible element is fitted at the front wall of every suspension and that the machine is furnished with a contrast mark pickup arranged on the cross piece mounted, in its turn, in brackets fastened on the aforesaid props.

EFFECT: high accuracy of balancing.

3 cl, 4 dwg

Description

The invention relates to the field of testing and measurement, namely to balancing technique, and can be used for dynamic balancing of rotors both as part of a product and individually.

Known balancing machine for dynamic balancing of rotors, containing a base with uprights on which elastic elements are placed, with suspensions mounted on them with supports, on (c) which place a balanced product (rotor). The elastic elements of each suspension are located in one vertical plane. Structurally, the elastic elements can be made in the form of rods (rods, wire, strings, torsion bars).

The elastic elements are installed with the ability to change the linear dimensions inside the contours of the uprights with equal angular gaps relative to the product being balanced and pivotally fixed at one end to the internal wall contour and the other at the supports, the latter being located in planes perpendicular to the axes of rotation of the balanced product.

To measure the deformation force in the elastic elements, the machine contains load cells mounted on the elastic elements. Force sensors are connected in parallel with a resistance magazine and a strain gauge amplifier, the output of which is connected to a multi-channel oscilloscope, the outputs of which are connected to the inputs of the deciding device and the switching unit.

The parameters obtained during balancing of the rotor are transferred to an analog-to-digital converter connected to a microcomputer (see RF patent No. 2077035, class G01M 1/22, 1997) - the closest analogue.

As a result of the analysis of the design of the known balancing machine for dynamic balancing of rotors, it should be noted that it is not able to balance the rotors with high accuracy, since vertical elastic suspensions do not provide equal rigidity of the linear movements of the balanced product in the plane of rotation, and also does not provide equal rigidity of the angular movements. The inability to control the damping of natural vibrations of the suspension-product system also reduces the accuracy of balancing the products.

The complexity of the locking mechanism, the complexity and the complexity of the readjustment of a known machine complicate the setting (reconfiguration) of it to balance products.

The objective of the present invention is to develop a balancing machine that provides high accuracy of product balancing, simple and convenient when setting up (reconfiguring) to balance products.

The task is ensured by the fact that in the balancing machine for dynamic balancing of rotors containing a base with racks on which suspensions with elastic elements and installation elements of a balanced product are mounted, the sensors for registering the parameters of the balanced rotor associated with the control unit connected to the master unit are new the fact that the elastic elements of each suspension are made in the form of rods of circular cross section installed in the front and rear supports of the suspensions, and between the front and rear an intermediate support contacting the rods is mounted to it with suspension supports with the ability to move in a horizontal plane, and an elastic element of a flat shape is installed in the front wall of each suspension, the machine is equipped with a contrast mark sensor mounted on the base stand and connected to the control unit, and on the elements the installation of the balanced product there are pins designed to interact with the holes of the device with the product when it is installed on the machine, while the suspensions are installed on the stand ah, with the adjusting movement.

Horizontal elastic elements in each correction plane, located in more than one plane and made in the form of rods of circular cross section, provide equal rigidity of linear movements of the balanced product in the plane of its rotation.

An elastic element located in the front wall of each suspension, made in the form of a flat spring with slots, ensures equal rigidity of linear movements in the plane of rotation of the rotor and along the axis of rotation, as well as the angular movements of the balanced product.

An intermediate support installed between the front and rear supports of the suspensions, changing their effective length, provides for the adjustment of the stiffness of the elastic elements of the suspensions.

The pins installed in the supports of the mounting elements, interacting with the mounting holes of the balancing device, provide precise adjustment of the mechanical part of the balancing machine to the product.

When conducting patent research from the prior art, no solutions are identified that are identical to the claimed, and, therefore, the claimed invention meets the eligibility condition “novelty”.

The invention does not follow explicitly from solutions known from the prior art, and, therefore, the claimed invention meets the eligibility condition "inventive step".

The information set forth in the application materials is sufficient for the practical implementation of the invention.

The invention is illustrated graphic materials on which:

figure 1 - balancing machine for dynamic balancing of the rotors;

figure 2 - suspension balancing machine;

figure 3 - balancing machine installed on it with a balanced product;

figure 4 is a functional diagram of a balancing machine.

The balancing machine for the dynamic balancing of rotors is made in the form of a prefabricated base consisting of rods 1 on which supports 2 are mounted with legs 3 adjustable in height on them.

The number of rods and supports can be different and depends mainly on the parameters of the product being balanced.

Fixing the supports 2 on the rods 1 can be carried out in various ways and does not present difficulties for specialists.

On the rods 1 between the supports 2 are mounted two racks 4 and 5 with suspensions installed on them (6 and 7, respectively). Racks 4 and 5 have the ability to move along the rods 1 and fixation in a predetermined position. Suspensions have the ability to adjust relative to the racks. To do this, on the lower planes of the suspensions there are pins that go into the holes of the racks, made at different distances from their front end. The location of these holes is determined by the size of the balanced products.

On one of the suspensions, a rotor rotation switching unit 8 is installed for connecting the product to a power source.

On the supports 2, brackets 9 and 10 are fixed with a cross member 11, on which a contrast mark sensor 12 is placed.

Suspensions 6 and 7 have an identical design.

The suspension 6 (or 7) is made in the form of a housing 13, in which, horizontally and parallel to each other, preferably not in the same plane, elastic elements 14 are installed, mounted in the rear 15 and front 16 supports, between which there is an intermediate support 17, which is constantly in contact with the elastic elements and having the ability to adjust movement between the front and rear supports in the horizontal plane. In the front support 16 of each suspension mounted elastic element 18, made in the form of a flat spring with slots. An induction sensor 19 is installed on one of the side walls of each suspension.

In the front support 16 there is a groove for installing the product (rotor), which is closed from above by a clamp 20 mounted on the support with the possibility of rotation and fixing in the closed position. A pin 21 is installed in the groove of the support. An arresting arm 22 is installed on the suspension housing.

The machine also includes a control unit 23 connected to the induction sensors 19 and the contrast mark sensor 12.

The control unit is associated with the driver unit 24.

The product is indicated at 25.

The design of the blocks, nodes and elements of the machine, not disclosed in the materials of this application, is known and does not constitute the subject of patent protection.

A balancing machine for dynamic balancing of rotors works as follows.

The machine base is set horizontally by means of adjustable legs. The clamps are fixed on the brackets of the arresters (see figure 2). Racks 4 and 5 of the machine are set to the position corresponding to the balanced rotor. A balanced rotor with a contrast mark previously applied on it in the balancing device is mounted on the supports, pin 21 at the same time enters the hole (not shown) of the device, is fixed with a clamp (see Fig. 3), and is connected to a power source (not shown) by means of the rotor switching unit ) and is driven into rotation.

In the process of rotation of the rotor, the horizontal elastic elements 14 provide equally rigid linear movements of the balanced product in the plane of rotation. The elastic element 18 provides linear displacements along the axis of rotation and angular displacements of the balanced product. If necessary, to ensure equal rigidity of the elastic suspension system (elements 14, 18), you can adjust the stiffness of the horizontal elastic elements 14 of the intermediate support 17.

The measuring coils of the induction sensors 19, connected with the supports 16, convert the vibration caused by the imbalance of the balanced product into an electrical signal. The optical sensor of the contrast mark 12 converts the change in the light flux reflected from the surface of the rotating product and the contrast mark into an electrical signal. The signals from the induction sensors and the contrast mark sensor are fed to the control unit 23, where they are amplified and then fed to the driver unit 24. The driver unit processes the received data and displays the result. The signals from the induction sensors 19 and the sensor of the contrast mark 12 determines the imbalance in the left and right planes of the balanced product, the rotation speed of the balanced product and the angular position of the unbalance on the correction plane.

Claims (3)

1. A balancing machine for dynamic balancing of rotors, comprising a base with struts on which suspensions are mounted with elastic elements and installation elements of a balanced product, sensors for registering parameters of the balanced rotor associated with a control unit connected to a master unit, characterized in that the elastic elements of each the suspension is made in the form of rods of circular cross-section, installed in the front and rear supports of the suspensions, and between the front and rear supports of the suspension with the possibility of movement I installed a horizontal support in contact with the rods in the horizontal plane, and an elastic element of a flat shape is installed in the front wall of each suspension, while the machine is equipped with a contrast mark sensor mounted on the cross member, which, in turn, is mounted in brackets mounted on the supports. 2. The balancing machine according to claim 1, characterized in that the elements of the installation of the balanced product have pins designed to interact with the holes of the device with the product when it is installed on the machine. 3. The balancing machine according to claim 1, characterized in that the suspensions are mounted on racks with the possibility of adjusting movement.

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