KR101848552B1 - Test method for air flow generators rotor coil bundle and air flow test apparatus - Google Patents

Abstract

A method of testing an airflow of a rotor coil bundle for a generator is disclosed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of testing an air flow of a rotor coil bundle for a generator,

The present invention relates to a method of testing an air flow of a rotor coil bundle for a generator, which enables an operator to easily perform an air flow test on a plurality of unit rotor coils and accurately determine whether the generator can be used for a generator having the generator Flow test apparatus.

Generally, a generator is a device that converts mechanical energy into electrical energy. The basic principle of a generator is to generate an electromotive force by using an electromagnetic induction action.

For example, when a coil is inserted between two magnets and the coil is rotated, a magnetic field is changed in the coil, and an induced electromotive force is generated at both ends of the coil to induce an induced current. The current generated in this way is an alternating current whose intensity and direction are periodically changed.

The generator is widely used in various industrial fields. For example, the generator receives rotational power from a steam turbine provided in a power plant. The steam generated by the furnace is supplied to the high-pressure turbine to operate the high-pressure turbine, and the steam supplied to the high-pressure turbine is supplied to the low-pressure turbine to operate the low-pressure turbine.

The steam turbine engine is arranged to transmit a rotational force in an axial direction, and transmits a rotational force to a generator axially coupled to the low-pressure turbine.

The generator includes a rotor disposed axially rotatably in a cylindrical casing and serving as an electromagnet by a magnetic flux generated by the rotor coil, a stator winding wound around the rotor in the axial direction, And a rotor coil which serves as a passage for generating a magnetic flux outside the axial direction of the rotor and flowing a current.

The rotor coil is formed in a hollow state and has an inlet port and an outlet port for the cooling water to flow therethrough so that the rotor coil is cooled through the cooling water flowing through the inlet port and then flows out through the outlet port.

A plurality of the rotor coils are constituted by one rotor coil bundle. In order to test whether the plurality of rotor coil bundles are clogged, an operator individually supplies gas to the individual rotor coils to test whether the rotor coils are clogged.

In this case, the worker must perform the clogging test for the unit rotor coils a plurality of times, thereby increasing the unnecessary work time and labor of the operator.

Korean Patent Publication No. 10-1999-0060547

Embodiments of the present invention provide an air flow test method of a rotor coil bundle for a generator capable of determining an abnormality with respect to a plurality of unit rotor coils through an air flow test by an operator and an air flow test apparatus using the same .

The method of testing an air flow of a rotor coil bundle for a generator according to an embodiment of the present invention includes a plurality of rotor coil bundles constituting the rotor coil bundle for testing whether or not the rotor coil bundles formed with the inlet and the outlet are clogged Supplying gas at a predetermined wind speed from the front of the unit rotor coil to the inlet; Sensing a total air flow condition of the rotor coil bundle at the outlet opening rearward through an inlet of the rotor coil bundle; And determining an air flow rate of the unit rotor coil with the air flow rate sensed by the rotor coil bundle.

The step of supplying gas at a predetermined wind speed toward the inlet includes supplying the fluid at a time to the inlet.

Wherein sensing the total air flow condition of the rotor coil bundle comprises sensing an individual air flow rate of the unit rotor coils discharged through the outlet; And storing the air volume data corresponding to the individual air volume of the unit rotor coils.

Wherein the step of determining the air flow rate of the unit rotor coils determines a total average value of the air flow detected by the unit rotor coils constituting the rotor coil bundle as a reference value air flow rate.

Wherein the step of determining the air flow rate of the unit rotor coils determines the reference air flow rate based on the maximum air flow rate detected by the unit rotor coils constituting the rotor coil bundle.

The step of determining the air flow rate of the unit rotor coil may include determining whether or not the unit rotor coil is detected to be less than the reference air flow rate, Detecting the position of the unit rotor coil corresponding to the reference air volume or less when the unit rotor coil detected as the reference air volume is less than the reference air volume; And the position and the air volume of the unit rotor coil sensed below the reference value air volume are displayed on the monitor.

The step of displaying the position and air volume of the unit rotor coil sensed below the reference air volume may be displayed in different colors according to a predetermined air volume range based on the reference air volume of the unit rotor coil do.

Wherein the step of displaying the unit rotor coils in different colors according to the predetermined airflow range is divided into a plurality of colors according to the intensity of the airflow and the unit rotor coils sensed with the lowest airflow amount are displayed in red do.

And determining whether or not the rotor of the other generator having different power generation capacities is used in accordance with different air flow rates of the unit rotor coils sensed below the reference value air flow rate.

Wherein the step of determining whether or not to use the rotor of another generator having the different power generation capacity includes the steps of: determining whether the air volume of the unit rotor coil determined to be below the current reference value corresponds to a reference value air volume required by another generator having the different power generation capacity; And classifying the unit rotor coils according to whether the air flow rate of the unit rotor coils satisfies the reference airflow amount required by the other generators.

And determining whether the unit rotor coils are reused or not by reusing the unit rotor coils and reusing the unit rotor coils if the air flow rate of the unit rotor coils is not satisfactory, .

Wherein the unit rotor coil is judged on the basis of the sensed air volume.

The apparatus for testing an airfoil of a rotor coil bundle for a generator according to an embodiment of the present invention includes a rotor coil bundle having an inlet port and an outlet port and disposed in front of the rotor coil bundle to test whether the rotor coil bundle is composed of a plurality of unit rotor coils, A gas supply unit; A connection part connecting between the gas supply part and an inlet port of the rotor coil bundle and supplying the gas generated from the gas supply part to the inlet port; A sensor unit separately inserted into the outlet and sensing the air volume of the gas that has been transferred to the outlet through the inlet; A controller for determining any one of a total average value or a maximum air amount among the air amount of the unit rotor coils sensed by the sensor unit as a reference value air amount and determining whether the air amount is normal or not based on the reference air amount; And a display unit for displaying the air volume of the unit rotor coil and the steady state or the steady state with respect to the reference value air volume by the control unit.

The connection unit includes a plurality of unit nozzles, one end of which is connected to the gas supply unit and the other end of which is inserted into the unit rotor coil.

The connection unit includes a sealing member provided at a front end of the unit nozzle and closely attached to an outer side of an inlet port of the unit rotor coil to prevent leakage of gas supplied from the gas supply unit after being connected to the unit rotor coil.

And the display unit is displayed on the monitor in correspondence with the arrangement state of the unit rotor coils.

If the air flow rate of the unit rotor coil is abnormal, the control unit compares the air flow rate with the reference air flow rate required by the other generators to determine whether the air flow rate is normal. If the air flow rate is abnormal, the control unit applies a control signal to the alarm unit .

The embodiments of the present invention can determine the clogging of a plurality of unit rotor coils by a single operation by the operator, thereby improving workability of the operator.

The embodiments of the present invention can reduce the cost because the unit rotor coils, which are measured relatively less based on the reference air volume of the unit rotor coils tested, can be reused.

Embodiments of the present invention can obtain reliable data through air flow tests for a plurality of unit rotor coils.

1 and 2 are flowcharts showing a method of testing an airflow of a rotor coil bundle for a generator according to an embodiment of the present invention.
FIG. 3 through FIG. 4 illustrate an apparatus for testing an air float of a rotor coil bundle for a generator according to an embodiment of the present invention. FIG.

A method of testing an air flow of a rotor coil bundle for a generator according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are flowcharts illustrating a method of testing an airflow of a rotor coil bundle for a generator according to an embodiment of the present invention.

1 and 2, the method of testing an air flow of a rotor coil bundle for a generator according to an embodiment of the present invention can test the clogging state of a plurality of unit rotor coils through a single airflow test, The workability is improved and the reliability according to the test is also improved.

In order to achieve the above object, the present invention provides a method of testing a rotor coil bundle, which is installed outside a rotor of a generator and which has an inlet and an outlet, (ST100) of detecting a total air volume state of the rotor coil bundle at the outlet opening rearward through the inlet of the rotor coil bundle (ST200); And a step (ST300) of determining the air flow rate of the unit rotor coil with the air flow rate sensed by the rotor coil bundle.

When the gas is supplied to the inlet at a predetermined wind speed (ST100), the fluid is supplied to the inlet at one time (ST110). The rotor coil bundle is composed of a plurality of unit rotor coils, and the unit rotor coils are supplied with gas at a predetermined wind speed at one time to test for clogging.

In this case, since the operator does not need to supply the gas to each of the plurality of unit rotor coils, the workability of the operator is greatly reduced and the data reliability for the air flow test is also improved.

When detecting the total air volume state of the rotor coil bundle (ST200), each individual air volume of the unit rotor coils discharged through the outlet is sensed (ST210). Since the rotor coil bundle is made up of a plurality of unit rotor coils, sensing the individual air flow rate improves the reliability of the data.

The air volume data corresponding to the individual air volume of the unit rotor coil is stored (ST220). The air volume data is very important for judging the air volume of the unit rotor coils, and it is determined whether the air volume is normal or abnormal depending on the measured air volume.

As an example, the reference air volume may be determined based on a total average value of the air volume detected by the unit rotor coils constituting the rotor coil bundle.

It is natural that a certain amount of air is measured in all of the unit rotor coils in the normal case, but the specific position is blocked in the process of manufacturing the unit rotor coils, or the gas supplied to the inlet port due to deformation is not stably discharged through the outlet .

In this case, when the outer appearance of the unit rotor coil is normal or the inner side is deformed, the air flow rate of the unit rotor coil is determined based on the reference value air flow (ST300).

In another embodiment for determining the reference value air volume, the reference air volume may be determined based on the maximum air volume of the air volume detected by the unit rotor coils constituting the rotor coil bundle. When the unit rotor coil bundle is normally manufactured, the gas supplied through the inlet is discharged without any loss through the outlet, so that the flow rate of the unit rotor coil is normally maintained at a specific flow rate.

The flow rate is measured in a state similar to or slightly reduced from the air flow rate supplied through the inlet, and the flow rate can be defined as a reference value air flow rate.

The air flow rate of the unit rotor coil is determined based on the reference air flow rate defined as above (ST300), and the presence or absence of the unit rotor coil detected below the reference value air flow is preferentially determined (ST310). If there is a unit rotor coil sensed below the reference value air flow rate, the position of the unit rotor coil corresponding to the reference air flow rate is detected (ST 320). The detection of the unit rotor coil can be sensed through the sensor unit, and the sensor unit will be described later.

After the position of the unit rotor coil corresponding to the reference air volume or less is detected, the position and air volume of the unit rotor coil are displayed on the monitor (ST330).

Various information about the unit rotor coils is displayed on the monitor, and for example, whether or not the position information, the air volume information, and the reference air volume are satisfied is displayed. The operator confirms various information displayed on the monitor through the naked eye and checks whether the unit rotor coil is normal or not.

When the position and air volume of the unit rotor coil sensed below the reference air volume are displayed on the monitor (ST330), they are displayed in different colors according to the section defined as the predetermined air volume range based on the reference air volume of the unit rotor coil (ST332 ).

If the colors are displayed in different colors according to the section defined by the predetermined air amount range (ST332), the unit rotor coils sensed at the lowest air amount are displayed in red, If the reference air volume is satisfied, it is displayed in green, and if it is close to the reference air volume but slightly insufficient air volume, it may be displayed as yellow.

Thus, when the operator is visually judged to be displayed in various colors, it is possible to accurately determine whether the unit rotor coil is in a state suitable for the reference air volume. Therefore, when the operator performs the air flow test on a plurality of unit rotor coils, it is possible to more accurately determine the unit rotor coils corresponding to the reference value air volume.

If the reference air volume is, for example, 100 L / min, a unit rotor coil that senses less than the reference air volume may exist. For example, n unit rotor coils sensed at 90 L / min or 95 L / min, n unit rotor coils sensed at 80 L / min, and n unit rotor coils sensed at 40 L / min may be present.

The reference air flow rate was measured at 100 L / min. However, the measured air flow intensity can be measured at various air flow rates different from each other as described above, and it is difficult to determine that the unit rotor coils having the measured air flow rate are all in an abnormal state have.

In the present embodiment, the current reference air volume is defined as 100 L / min, but n unit rotor coils sensed at 90 L / min or 95 L / min and n unit rotor coils sensed at 80 L / It can be used after determining whether or not it can be used in a rotor of another generator having different generating capacity although it does not satisfy the reference air volume of the coil (ST400).

The present invention determines whether the measured air volume of the unit rotor coils corresponds to the reference air volume required by other generators having different generating capacity (ST410). The other generators having different generating capacities may be installed in a generator having the smaller generating capacity even when the generator capacity is smaller than the reference value air flow measured at the unit rotor coils as a generator having a smaller capacity than the generator.

In this case, the unit rotor coils are classified according to whether the air flow rate of the unit rotor coils satisfies the reference air flow rate required by the other generators (ST420). The classification of the unit rotor coils is implemented by a controller, which will be described later, without being performed by an operator.

As described above, the present invention can be applied to not only determine the satisfaction of the reference value air volume but also the reference air volume required by other generators, so that it can be used for other generators when the air volume is not significantly lower than the reference air volume.

If the air flow rate of the unit rotor coils is unsatisfactory (ST424), it is determined whether or not the unit rotor coils are reused. The reuse of the unit rotor coils may be reprocessed and reused or discarded (ST426).

Wherein the unit rotor coil is judged on the basis of the sensed air volume, and when the air volume sensed by the unit rotor coil is significantly lower than the reference value air volume, the unit rotor coil is classified, Or inner side, and can be used for other generators through rework.

In this case, since the unit rotor coils can be reused, they can be used without disposal, thereby improving the economical efficiency.

If the air volume detected by a unit rotor coil located at a specific position is measured to be significantly lower than the reference value air volume, a simple visual inspection is performed before disposal.

An air float test apparatus for a generator coil bundle for a generator according to an embodiment of the present invention will be described with reference to the drawings.

3 to 4, an air float testing apparatus 1 for a generator coil bundle for a generator according to the present embodiment includes an inlet 11 and an outlet 12, and a plurality of unit rotor coils 10a- And a rotor coil bundle 10 disposed in front of the rotor coil bundle 10 in order to test whether the rotor coil bundle 10 made up of the rotor coil bundle 10 and the rotor coil bundle 10 is made of the same material, A connection part 200 connecting between the inlet 11 of the gas supply part 100 and supplying the gas generated from the gas supply part 100 to the inlet 11, A sensor unit 300 that senses the air volume of the gas that has been transferred to the outlet 12 via the sensor unit 300,
A control unit 400 for determining any one of a total average value or a maximum air amount among the air amounts of the unit rotor coils 10a to 10n sensed by the sensor unit 300 as a reference value air amount and determining whether the air amount is normal based on the reference air amount And a display unit 500 for displaying the air flow rate of the unit rotor coil and the steady state or non-steady state with respect to the reference air flow rate by the control unit 400.

The unit rotor coils 10a to 10n are formed of a plurality of units and are provided with a pedestal 20 so as to be positioned at a position spaced upward from the ground for the airflow test.

Since the unit rotor coils 10a to 10n have a rectangular cross section and the inlet 11 and the outlet 12 are formed in a predetermined size, when the gas is supplied by the gas supplier 100, And then discharged through the outlet (12).

The gas supply unit 100 according to the present embodiment is of an impeller type and supplies the gas to the inlet 11 at a predetermined air velocity.

The connection unit 200 includes a plurality of unit nozzles 210a to 210n having one end connected to the gas supply unit 100 and the other end inserted individually into the unit rotor coils 10a to 10n.

Since the connection unit 200 supplies gas to the unit rotor coils 10a to 10n at one time, the unit nozzles 210a to 210n are formed in a number corresponding to the unit rotor coils 10a to 10n.

The connecting part 200 has a rectangular or polygonal body having a hollow inside and a rubber elastic part to be in close contact with the outer side of the gas supplying part 100. The connection part 200 is prevented from being separated by a clamp for fixing the connection part 200 so as to prevent leakage of gas to the outside of the connection part 200.

The clamp stably blocks the disconnection or separation of the connection part 200 even when gas is supplied from the gas supply part 100 to the unit rotor coils 10a to 10n at a predetermined pressure, Can be closely contacted to the outer circumferential surface of the gas supply part 100 to prevent partial gas leakage phenomenon.

Therefore, when performing the airflow test on the rotor coil bundle 10, all the gases generated in the gas supplying part 100 can be supplied to the rotor coil bundle 10, and the airflow having a specific flow rate can be supplied constantly .

The plurality of unit nozzles 210a to 210n are provided with a sealing member 220 at the tip end thereof to prevent external leakage of the gas supplied from the gas supplying unit 100 after the unit coils 10a to 10n are connected .

Since the sealing member 220 is made of a material having elastic restoring force, such as rubber or silicon, when the sealing member 220 is in close contact with the outside of the inlet 11, leakage of the gas can be stably prevented.

Preferably, a rubber ring is provided on the outer side of the sealing member 220, so that the sealing member 220 is brought into close contact with the unit rotor coils 10a to 10n to prevent gas leakage.

The sensor unit 300 according to the present embodiment has the same number of unit rotor coils 10a to 10n as the sensor unit 300 is inserted into the outlet 12 separately and is separated from the outlet 12 by a separate support bracket Respectively.

The sensor unit 300 uses a sensor for sensing air volume and transmits the detected air volume information to the controller 400. [ The control unit 400 determines whether the unit rotor coils 10a to 10n are in a steady state in comparison with the reference value air volume required by the other generators when the air flow rate of the unit rotor coils 10a to 10n is abnormal, A control signal is applied to the alarm unit 600 so as to inform the operator.

The alarm unit 600 can perceive audibly during work by the operator and can accurately recognize that the air volume of the current unit rotor coils 10a to 10n is in a steady state and can perform screening for the unit rotor coils .

Since the display unit 500 according to the present embodiment is displayed on the monitor in correspondence with the arrangement states of the unit rotor coils 10a to 10n, the operator can accurately recognize the unit rotor coils after checking the monitor, .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

10: Rotor coil bundle
10a to 10n: unit rotor coils
11: Inlet
12: Outlet
100:
200: Connection
300:
400:
500:
600: Alarm section

Claims (17)

A plurality of unit rotor coils constituting the rotor coil bundle, which are provided outside the rotor of the generator and constitute the rotor coil bundle for testing the presence or absence of clogging of the rotor coil bundles formed with the inlet and the outlet are supplied with gas at a predetermined wind speed toward the inlet step;
Sensing a total air flow condition of the rotor coil bundle at the outlet opening rearward through an inlet of the rotor coil bundle; And
And determining an air flow rate of the unit rotor coil with the air flow rate sensed by the rotor coil bundle. The method according to claim 1,
Wherein supplying gas at a predetermined wind speed toward the inlet comprises feeding fluid at a time to the inlet. The method according to claim 1,
Wherein sensing the total air flow condition of the rotor coil bundle comprises sensing an individual air flow rate of the unit rotor coils discharged through the outlet;
And storing air flow rate data corresponding to an individual air flow rate of the unit rotor coils. The method according to claim 1,
Wherein the step of determining the air flow rate of the unit rotor coils comprises determining a total average value of the air flow rate detected by the unit rotor coils constituting the rotor coil bundle as a reference value air flow rate. The method according to claim 1,
Wherein the step of determining the air flow rate of the unit rotor coils is based on the maximum air flow rate detected by the unit rotor coils constituting the rotor coil bundle. 5. The method of claim 4,
The step of determining the air flow rate of the unit rotor coil may include determining whether or not the unit rotor coil is detected to be less than the reference air flow rate,
Detecting the position of the unit rotor coil corresponding to the reference air volume or less when the unit rotor coil detected as the reference air volume is less than the reference air volume;
And the position and air volume of the unit rotor coil sensed below the reference air volume are displayed on the monitor. The method according to claim 6,
The step of displaying the position and air volume of the unit rotor coil sensed below the reference air volume may be displayed in different colors according to a predetermined air volume range based on the reference air volume of the unit rotor coil A method for testing an air flow of a rotor coil bundle for a generator. 8. The method of claim 7,
Wherein the step of displaying the unit rotor coils in different colors according to the predetermined airflow range is divided into a plurality of colors according to the intensity of the airflow and the unit rotor coils sensed with the lowest airflow amount are displayed in red A method for testing an air flow of a rotor coil bundle for a generator. 5. The method of claim 4,
And determining whether or not to use the rotor of another generator having different power generation capacities according to different air volumes of the unit rotor coils detected to be below the reference value air flow rate. 10. The method of claim 9,
Wherein the step of determining whether or not to use the rotor of another generator having the different power generation capacity includes the steps of: determining whether the air volume of the unit rotor coil determined to be below the current reference value corresponds to a reference value air volume required by another generator having the different power generation capacity;
And classifying the unit rotor coils according to whether the air flow rate of the unit rotor coils satisfies the reference air flow rate required by the other generators. 11. The method of claim 10,
And determining whether the unit rotor coils are reused or not by reusing the unit rotor coils and reusing the unit rotor coils if the air flow rate of the unit rotor coils is not satisfactory, The method comprising the steps of: 12. The method of claim 11,
Wherein the presence or absence of disposal of the unit rotor coil is determined on the basis of the sensed air volume. A gas supply unit positioned in front of the rotor coil bundle for testing whether or not the rotor coil bundle having the inlet and the outlet and formed of a plurality of unit rotor coils is clogged;
A connection part connecting between the gas supply part and an inlet port of the rotor coil bundle and supplying the gas generated from the gas supply part to the inlet port;
A sensor unit separately inserted into the outlet and sensing the air volume of the gas that has been transferred to the outlet through the inlet;
A controller for determining any one of a total average value or a maximum air amount among the air amount of the unit rotor coils sensed by the sensor unit as a reference value air amount and determining whether the air amount is normal or not based on the reference air amount; And
And a display unit for displaying the air flow rate of the unit rotor coil and the steady-state or non-steady-state relative to the reference air flow rate by the control unit. 14. The method of claim 13,
Wherein the connecting portion includes a plurality of unit nozzles, one end of which is connected to the gas supply portion and the other end of which is inserted individually into the unit rotor coils. 15. The method of claim 14,
Wherein the connecting portion includes a sealing member provided at a tip end of the unit nozzle and closely attached to an outer side of an inlet of the unit rotor coil to prevent leakage of gas supplied from the gas supplying portion after being connected to the unit rotor coil, Bundle air flow test device. 14. The method of claim 13,
Wherein the display unit is displayed on the monitor in correspondence with the arrangement state of the unit rotor coils. 14. The method of claim 13,
The control unit compares the air flow rate of the unit rotor coil with the reference air flow rate required by the other generators to determine whether the unit rotor coil is in a steady state and applies a control signal to the alarm unit to generate a buzzer sound Air flow test device for rotor coil bundle for generator.

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