JPS5972036A - Imbalance correcting method and automatic setting device of its correcting weight - Google Patents

Abstract

PURPOSE:To make the post-work of fine adjustment unnecessary, by decomposing a measured imbalance into components of two adjacent axes forming an unbalanced angle to calculate a correcting weight quantity of a washer member to be fitted. CONSTITUTION:Projections 1-8 for correction of a rotor are provided. An imbalance of a correction plane S exists between projections 1 and 2 for correction, and the imbalance is U. The imbalance U is decomposed into an imbalance U10 of the projection 1 for correction and an imbalance U20 of the projection 2 for correction. It is discriminated whether decomposed imbalances U10 and U20 exceed a limit value U1 (maximum correction quantity covered by one projection) or not. If the imbalance U10 exceeds a limit value U0, a value U11 obtained by subtracting the limit value U1 from this value is decomposed into components of projectuous 2 and 8 for correction (U8 and V21). Thus, the correcting weight quantity of the washer member to be fitted is calculated to make the post-work of fine adjustment unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION In particular, when correcting the lower seat of a rotating body such as an induction motor, the present invention provides an unbalanced system for attaching a washer-like unbalance correcting weight to an unbalance correcting protrusion. The present invention relates to a misalignment correction method and an automatic correction weight installation device.

Traditionally, there have been methods for correcting this unbalance in the rotor, such as by using IJ songs or milling, depending on the shape and characteristics of the rotor, but in general, as shown in Figure 1, ,times.

Multiple misalignment correction pins are protruded from the peripheral ends of the aluminum conductors on the left and right sides of the trochanter, and multiple washer-like correction weights of different weights are fitted onto these protrusions or protruding pins in combination. A method is adopted to correct the imbalance. Conventionally, to carry out this correction method, a worker places a rotor on a balancing machine, rotates it, measures the misalignment, and determines which correction method to use based on the measured misalignment angle and amount. The worker calculated what weight of correction weight should be attached to the protrusion and attached it each time.

When making this calculation, it is extremely rare that the correction is completed by attaching one or two correction weights to one correction protrusion for each of the left and right correction surfaces, but usually two correction protrusions are used. Each had to be fitted with 2-4 correction weights. For this reason, after installing the correction weight, place the rotor on the balancing machine again, measure the unbalance, and if the unbalance is not within the allowable value, determine the amount of correction weight and, in some cases, the position of the protrusion to be attached. Also change the
The unbalance was measured again, and once the unbalance was within the allowable value, this process was repeated. Once the unbalance was within the allowable value, the protrusion was hammered and caulked to prevent the correction weight from falling.

There are many types of rotors of this kind, and the number of correction protrusions per circumference also varies, and there are also many types of correction weights.

Furthermore, it is troublesome and difficult to calculate which correcting weight and which other correcting weight is best to attach to which protrusion of each correcting surface based on the measured angle and amount of unbalance. It was complicated.

In view of the above-mentioned problems, an object of the present invention is to select at least two optimal protrusions from among a large number of protrusions protruding from the correction surface of a rotating body based on the measured values by a misalignment measuring machine. To provide an unbalance correction method that eliminates the need for work after fine adjustment by specifying the weight of a washer member to be fitted to each specified projection at the same time,
Another object is to provide an unbalance correction weight automatic mounting device that allows a washer member corresponding to the calculated correction weight amount to be fitted onto each designated protrusion.

With reference to FIG. 2, the unbalance correction method of the present invention will be explained.

An example of automating the calculation of the correction portion and correction weight will be described. Taking the rotor of an induction motor as an example, its unbalance is measured on two corrected surfaces, the left and right, using a general balance tester. Next, the unbalance on each surface is corrected using several types of washer-like correction weights with predetermined weights. This can be easily done by disassembling it. There is a limit to the amount of correction that can be made with one correction protrusion. This is because the caulking process in the final process after correction becomes impossible. If the unbalance is so large that it is impossible to correct it with two correction protrusions, correction is performed using three, four, or more correction protrusions.

As shown in Figure 2, the rotor has eight correction protrusions.
An example of calculating an actual correction weight is shown below. The correction protrusions on the rotor are indicated by ■～■. First, there is a discrepancy on the correction surface S between the correction protrusion and ■, and the discrepancy is 100.

Next, the protrusion for correcting the hundred ■ unbalanced hundred,. It is decomposed into the unbalance U2o. An unbalanced adventure, broken down. L
It is determined whether o exceeds a limit value M1 (the maximum amount of correction that can be made with one protrusion). In the case of the unbalanced state shown in the figure, the unbalance Mlo exceeds the limit value Uo, so the value obtained by subtracting the limit value 100 from this value is 100,1
, two correction protrusions ■ and ■ sandwiching the correction protrusion ■.
It is broken down into its components (nails and V21). The unbalance corrected by each correction protrusion is 101 for the correction protrusion ■, and 100 for the correction protrusion ■. +100. 0, press 100 on the correction protrusion ■.

In other words, it is a three-axis decomposition. Of course, vlo
If exceeds the limit value f1, then the correction protrusion ■ is 100.

, In the modification protrusion (2), W2o is modified, which is a two-axis decomposition.

The correction weight for each discrepancy is 1=5y, 100. . +100. ,=
If 8.5fl, 108=2g, the prepared washer-like correction weight has a weight of 0.5ii', IF, 29.3g, then the correction protrusion 1 has a washer-like correction weight 2q. There are one piece of washer-like correction weight 0.5g and one piece of 317 on the correction protrusion 2, one piece of washer-like correction weight 2y on the correction protrusion 8, and the mode is as follows. It is shown at the bottom of Figure 2. As described above, the imbalance measured by the balance tester can be corrected by attaching several predetermined washer-shaped correction weights to several correction protrusions using electrical signals.

Next, one embodiment of the automatic unbalance correction weight mounting device of the present invention will be described.

FIG. 3 is an explanatory diagram of an automatic correction weight installation device for a balance correction machine according to the present invention.

l is the rotor of the induction motor. 2 is a protrusion for correcting the unbalance of the rotor, and 3 is a correcting weight for correcting the unbalance. This correction weight is stored in a correction weight storage container 4. In this embodiment, a washer-shaped correction weight is used, and the storage container 4 is pipe-shaped. The washer-like correction weight (washer) at the lowest position rests on a bush plate 5 having a notch in the center of the cut-out reservoir. 6 is also a washer for correcting unbalance, but it is different from washer 3 described above in weight and external dimensions. This washer is also housed in a modified weight storage container 7 that matches the external dimensions. The washer at the lowest position is placed on the cut-out buttress plate 8.

The storage container 4.7 containing washers of several different weights and dimensions is attached to the disc-shaped plate 9 to form a magazine unit 101 for storing all the correction weights. The assembly of the magazine unit 101 and the main shaft 10 of the drive unit 102 for rotating and positioning the magazine unit is provided with a tapered spigot part, so that the magazine unit 101 can be easily replaced. There is.

The main shaft (20) has a bearing 11 incorporated therein so that it can rotate with high precision, and a timing pulley 15 for transmitting rotational driving force is incorporated in its lower part. A motor 12 with a speed reducer to which a timing pulley 13 is attached is rotated at low speed via a timing belt 14. Symbol A is the cutting position of the correction weight (magazine unit) 101
A correction weight supply unit (103) is provided which receives the correction weight sent out from the correction weight and moves to a position opposite to the correction protrusion. It is fixed to an arm 20 attached to a swing motor 21 by a compression spring 17 due to spring reaction force. Inside the supply bottle 16, a tip bottle 18 and a compression spring 19 for pushing it up are incorporated and twisted. Supply pin 1
At the bottom of 6, there is a cylinder 22 that raises the supply pin 16 at the time of cutting out, and a cylinder 22 that is rotated by a swing motor 21.
In order to supply the washer to the protrusion 2 of the motor rotor l,
A cylinder 23 is provided to press the supply pin 6 which has been moved to the position 4 from the rear.

The order of extraction is usually from the smallest to the smallest. This is because when supplied to the rotor, a large washer is attached to the base of the protrusion of the rotor, improving overall stability. It is calculated by the rotor positioning device, which is not detailed here, to attach one correction weight b and one correction weight e to a certain correction protrusion that has been positioned based on the angle and amount determined by the unbalance measurement. Suppose that

First, the butcher plate 5 cuts out the washer-shaped lowest part by an operating source such as a cylinder.Next, the supply pin 16 is pushed by the cylinder 22 and rises, and the compression spring 17 is compressed. The tip pin 18 is the button plate 5
is inserted into the inner diameter of the washer that rests on it, and then the butcher plate 5 is returned.

Through this series of operations, the washer cut out by the bushing plate 5 is caught on the tip pin 18 and remains on the supply bin. When the cylinder 22 returns, the compression spring 17
The supply pin 16 returns to its original position due to the reaction force. A series of operations is shown in FIG. Next, in response to an electric signal, the main shaft IO is rotated by the motor 12 with a speed reducer at a point where the storage pipe for the correction weight d to be cut next is stopped at point A. A
When it rotates to the point, it is accurately stopped by an electric signal from a limit switch provided at point A, and the cutting operation starts. This operation is repeated several times in succession until a predetermined combination of washers is met based on the unbalance measurements, and a plurality of washers are cut out onto the supply pin 16. The supply pin 16 containing a plurality of washers is
The supply pin 16, which is rotated by the swing motor 21 and is located at the position 24, is pushed by a protrusion of the rotor in the cylinder 23. The operation is as follows: the supply pin 16 advances, the tip pin 18 hits the protrusion, then the tip pin 18 is pushed by the protrusion, compressing the compression spring 19, and the protrusion enters the supply pin 16. The end face 16 ensures that the protrusion is inserted to the base as shown in FIG. The operation of supplying washers to the protrusions of the rotor is performed successively to several protrusions depending on the unbalance measurement value, and the washer installation is completed. When the rotor is transported or rotated during unbalance measurement, the correction weights inserted into the protrusions as described above may fall off.

In order to prevent such inconvenience, a washer-like correcting weight with a notch and an inner diameter slightly larger than the diameter of the tip of the protrusion, as shown in FIG. 6A, is used.

This washer with the notch is prepared in the pipe a, and when correction is to be made, this correction weight is selected first and inserted into the pin 18. Considering the weight of this correction weight, other correction weights are sequentially selected and inserted into the pin 18. When configured in this way and pushed into the protrusion of the rotor, the tip of the protrusion is usually tapered, so the notch of the correction weight is bitten by the protrusion to prevent the correction weight from falling off. In addition to the method described above, as shown in FIG.
It is also possible to prevent the correction weight from falling off by providing a beam 26 on the protrusion while supplying the correction weight.

[Brief explanation of the drawing]

FIG. 1 is a front view and a right side end view of a rotating body, FIG. 2 is a diagrammatic explanatory diagram of the method of the present invention, and FIG. 3 is a schematic cross-sectional view of essential parts showing an embodiment of the apparatus of the present invention. FIG. 4 is an explanatory diagram of the operation of the device according to the embodiment, FIG. 5 is an explanatory diagram of a state in which a washer member is fitted to the correction surface protrusion, and FIG. 6 and FIG. FIG. 2 is an explanatory diagram of main parts of an embodiment of the apparatus. 1 is a rotating body, 2 is a protrusion, 3 is a washer member, 4 and 7 are storage containers, 5 and 8 are pusher plates, 9 is a disc-shaped plate, ∎ Old magazine unit, 102 is a drive unit)
, 103 is a supply unit. No. “. /2 21 1 Figure 2. △

Claims (3)

[Claims] (1) In the unbalance correction method for a rotating body, when correction is possible only on equally divided component force coordinate axes and there is a limit to the amount of correction on one axis, the measured unbalance First, the amount is determined by two adjacent units with an unbalanced angle between them.
If the component exceeds a predetermined limit value, it is further decomposed into components of two adjacent axes sandwiching that axis, and each component on each axis is An unbalance correction method characterized by calculating the sum of the values, calculating the sum until the limit value is no longer exceeded, and using two or more axes to obtain the optimum amount of correction. (2) An unbalance correction method in which an unbalance correction weight is attached to an unbalance correction position of a rotating body, which comprises a storage container for storing a plurality of correction weights and a butcher plate for delivering the correction weights. A magazine unit, a drive unit for rotating and positioning the magazine unit, and a correction unit that receives and receives a correction weight sent out from the magazine unit and moves it to a position opposite to a predetermined correction position of a rotating body. An unbalance correction weight automatic mounting device characterized by comprising a projection unit and a mounting unit 1 for mounting a correction weight of the supply unit in a correction position. (3) Claim 2, characterized in that a taper-shaped pin is protruded at the rotational/body unbalance correction position, and a washer member with a notch is used as the correction weight. The device described in.