KR20170109872A - Inspection method for a rotating component - Google Patents

Abstract

The present invention relates to a method of inspecting a rotating component, comprising: a serial number assigning step of assigning a serial number to a rotating component to identify the rotating component; and a step of displaying a plurality of indexes An index display step and an initial data storing step of storing and storing an initial state of the rotary part indicated by the index, a limit use value setting step of setting a limit use value of the rotary part based on the stored initial data, A state data storing step of storing data of a current state of each part of the rotating parts inspected and a current state checking step of a rotating part to inspect the current state and comparing the stored state data with a limit use value, It can be configured to include a maintenance decision step to determine According to the present invention, it is possible to identify the rotating parts constituting the rotating device in an identifiable manner and to grasp the internal damage and wear of the rotating part through photographing, current application and infrared detection, Effect can be expected.

Description

[0002] Inspection method for a rotating component [

The present invention relates to a method of inspecting rotating parts, and more particularly, to a method of inspecting a rotating part by identifying marks on rotating parts constituting a rotating device and detecting external damage and wear of rotating parts through photographing, induction of eddy current, The present invention relates to a method of inspecting a rotating component so as to appropriately determine the timing.

The inside of a rotating machine such as a gas turbine, a steam turbine, a wind turbine, etc. has a very complicated structure. Damage to each rotating component constituting such a rotating machine is not frequent, but if the damage is caused once or the allowable wear rate is exceeded due to use for a long period of time, the power generation is interrupted and the operation of the equipment is disrupted.

Therefore, there is a need to periodically grasp the extent of damage such as wear and cracks of rotating parts. Conventionally, in order to inspect the inside of a rotating machine, equipment such as an endoscope equipped with an inspection device such as a camera was put into the inside of the rotating machine and the condition of each part was inspected.

However, in this method, it is not easy to accurately grasp a specific part of the rotating parts whose position changes in the circumferential direction once rotated. For example, in the case of a tooth of a gear, a plurality of teeth are disposed along the periphery of the gear. When the tooth is rotated once, the position of the teeth is changed. Therefore, It is difficult to grasp.

Therefore, an inspection method capable of accurately grasping the state of the rotating component constituting the rotating device is required.

Korean Patent Publication No. 10-2013-0068737

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a rotatable device, Abrasion, and the like, so that maintenance time can be properly determined.

According to an aspect of the present invention, there is provided a method of inspecting a rotating part, including: a serial number giving step of giving a serial number to a rotating part to identify the rotating part; An index display step of displaying a plurality of indexes on the basis of the stored initial data, an initial data storing step of storing and storing the initial state of the rotating parts indicated by the index, A step of inspecting a current state of a rotary part for inspecting a current state of each part of the rotary part, a step of storing a state data storing step of storing the current state of each part of the inspected rotating part, To determine whether to maintain the rotating parts It may include a determination step.

Further, in the embodiment of the present invention, the index display step may be a step of displaying an identification symbol at a predetermined interval along the circumferential direction of the rotating part.

Further, in the embodiment of the present invention, the step of setting the limit value may be a step of setting the allowable limit wear rate or the limit crack size for each part where each index is indicated on the rotating part.

In addition, in the embodiment of the present invention, the step of inspecting the current state of the rotating component includes a step of inspecting an external state of the rotating component to inspect the external state through external photography of the rotating component, and a step of inspecting the internal state by inducing an eddy current And an internal state checking step of the internal state checking step.

In the embodiment of the present invention, the checking of the external condition of the rotating part may include a serial number recognition step of photographing and recognizing the serial number of the rotating part, a step of sequentially photographing the index of the rotating part, And an index check step of checking the index.

Also, in the embodiment of the present invention, the step of inspecting the internal state of the rotating component may be an eddy current induction step of inducing an eddy current to the rotating component to determine the position and size of the internal crack of the rotating component through eddy current distribution.

In the embodiment of the present invention, the maintenance determining step may include a step of extracting limit use value information for extracting the previously used limit use value information, and a step of extracting status information for each part of the rotating part And an internal state determination step of comparing the internal crack size measured in the internal state inspection step of the rotating part with the limit use value information.

According to another aspect of the present invention, there is provided an inspection system for a rotary part, including a serial number designation unit for designating a serial number to a rotary part to identify the rotary part, A database unit for storing and storing an initial state and a current state of the rotary part and an initial state data of the stored rotary part; And a maintenance determining unit for determining whether to maintain the rotating parts by comparing the current state data of the stored rotating parts with the limit use value.

Further, in the embodiment of the present invention, the limiter can set the allowable limit wear rate or the limit crack size for each part where each index is indicated in the rotating part.

According to an embodiment of the present invention, the inspection unit may include an external state inspection unit for inspecting an external state through external shooting of the rotating component, and an internal state inspection unit for inspecting the internal state by inducing an eddy current to the rotating component.

Also, in the embodiment of the present invention, the external condition checker may include a serial number recognizing unit for photographing and recognizing the serial number of the rotating component, and an index checking unit for sequentially photographing the index of the rotating component and checking the state of each component of the rotating component .

Also, in an embodiment of the present invention, the internal state checking unit may include an eddy current induction unit for inducing an eddy current to the rotating component and determining the position and size of the internal crack through the eddy current distribution.

In addition, in the embodiment of the present invention, the maintenance determining unit may include a limit use value information extracting unit for extracting limit input value information, a state information for each part of the rotary part photographed by the external condition checking unit, And an internal state determiner for comparing the crack size measured by the internal state detector with the limit use value information.

According to the present invention, a serial number is assigned to a rotating component mounted on a rotating device to distinguish it from other rotating components, an index is written at a predetermined interval along the circumferential direction of the rotating component, It is possible to easily identify the state change of each part of the rotating part by comparing the initial state data and the after-use state data after the use.

At this time, the user can grasp the external wear and cracks of the rotating parts through the inspection equipment and compares them with the initial photographing data, and the internal cracks of the rotating parts are guided by the eddy current induction, Can be indirectly grasped.

 This helps to determine the proper maintenance time due to the wear and damage of rotating parts, and ultimately enables smooth operation of rotating equipment such as gas turbine, steam turbine, etc., .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for inspecting a rotating component of the present invention.
FIG. 2 is a detailed flowchart of the current inspection step of the invention shown in FIG. 1. FIG.
FIG. 3 is a detailed flowchart of the maintenance determination step of the invention shown in FIG. 1; FIG.
4 is a control diagram relating to an inspection system for a rotary part according to the present invention.
5 is a flow chart showing a control procedure of the inspection system of the rotary part of the present invention.
FIG. 6 is a state in which an index is indicated on the gear teeth; FIG.
7 is a state in which an index is indicated on a bearing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a rotating apparatus inspection method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flow chart of a method of inspecting a rotary part according to the present invention, FIG. 2 is a detailed flowchart of the present state inspection step of FIG. 1, FIG. 3 is a flowchart FIG. 4 is a control diagram relating to an inspection system of a rotating component according to the present invention, and FIG. 5 is a control flowchart according to an inspection system of a rotating component according to the present invention. 6 is a state in which an index is indicated on the gear teeth, and FIG. 7 is a state in which an index is shown on the bearing.

1 to 5, a method of inspecting a rotating component according to the present invention includes a serial number application step S10, an index display step S20, an initial data storage step S30, a limit use value setting step S40, An audit step S50, a state data storage step S60, and a maintenance decision step S70.

Referring to FIGS. 1 and 5, the serial number assigning step S10 may be performed in order to identify rotating parts such as gears, bearings, buckets, and blades mounted on rotating equipment such as gas turbines, steam turbines, wind turbines, (A1) of assigning a serial number to the component, which is performed by the serial number designating unit 10 shown in FIG.

Such a serial number granting scheme can be given with a constant serial number according to the position of each rotating component mounted on the rotating device. For example, in the case of a gas turbine, the rotating parts of the turbine part of the rotor may be assigned in units of 100, such as serial number assignments 101, 102, 103 ..., and the rotating parts of the compressor part of the rotor may have a serial number grant of 201 , 202, 203, ..., so that they can be distinguished from each other.

As another example, such a serial number assignment may also be performed by a method in which the serial number is previously displayed on the rotating part by the user at the time of assembling the initial rotating device.

Referring to FIGS. 1 and 5, the index display step S20 may be a step A2 of displaying a plurality of indexes at predetermined intervals on a specific rotating component to which the serial number is assigned, May be performed by the index specification unit 20. At this time, the predetermined interval may be an identification symbol along the circumferential direction of the rotating part.

6, a portion of a tooth 210 disposed along the body 220 of the gear 200 is shown. As shown in the drawing, a serial number is assigned to the side of the gear teeth 210 So that the state of a specific part of the rotating part can be recognized by setting a serial identification number at a predetermined interval, that is, at intervals of gear teeth 210, in one specific rotating part.

7, a bearing 300 is shown, and a serial number is displayed on the side of each roll 320 of the bearing, as shown in the figure, so that the bearing 300, which is one specific rotating part, That is, the rolls 320 of the bearings, so as to be able to recognize the state of a specific roll 320 of the rotating part.

Of course, as shown in the drawing, the inner reference wheel 330 and the outer ring 310 may be further angularly displayed to indicate the reference origin, so that the inspection can be easily performed by setting the reference reference point for the subsequent inspection.

However, such an index display method is only an example, and it can be configured in any other appropriate manner, and therefore it is not limited thereto. In another embodiment, such indexing may be performed by the user. In this case, the index may be displayed at a predetermined interval on the rotary part in which the serial number is previously displayed when assembling the rotary device.

Next, referring to FIGS. 1 and 5, the initial data storing step S30 may be a step (A3) of dataizing and storing the initial state of the rotary part indicated by the index, (30).

The database unit 30 first selects a rotating component to input initial state data for each serial number and records and records the initial state of each rotating component according to the index identification symbol on the selected rotating component.

At this time, the external state of the rotating component is photographed, and the initial reference is determined and stored by analyzing the degree of the initial wear and crack, and the internal state of the rotating component induces the eddy current to determine whether the eddy current distribution state is changed , Its position and size, and the like. Since the portion where the eddy current distribution is not uniform is the portion where the internal crack is present, the initial internal crack is detected in this manner and the initial criterion is set and stored.

Referring to FIGS. 1 and 5, the limit use value setting step S40 may be a step A4 of setting a limit use value of the rotary part based on the stored initial data, (40). ≪ / RTI >

The limit unit 40 determines the limit use value of the rotating component based on the initial state data of the rotating component stored in the database unit 30. For example, in the case of the external condition of the rotating component, It is determined whether the wear rate is acceptable and whether or not the wear rate detected later exceeds the allowable limit value.

In the case of the internal state of rotating parts, it is determined how much the internal crack size is allowed based on the initial state value, and the crack size is calculated through the distribution diagram detected through the subsequent eddy current induction, It is judged whether the threshold value is exceeded or not, and a criterion is provided to determine whether maintenance is performed or not.

Therefore, in the limit use value setting step, the allowable limit wear rate or the limit internal and external crack sizes are set for each part indicated by the index on the rotating part by the limiter 40. When the rotating part exceeds the use limit value Or not.

Next, referring to FIGS. 1 and 5, the current state inspection step S50 may be a step of checking the current state of each part of the rotating parts, and the inspection is performed by the inspection part 50 shown in FIG.

The step of inspecting the present state includes a step S51 of inspecting an external state of the rotating part through external shooting of the rotating part and a step S54 of inspecting the internal part of the rotating part inspecting the internal state by applying a current to the rotating part. ≪ / RTI > Performing such steps may be performed by the external state checking unit 51 and the internal state checking unit 54, respectively, constituting the checking unit 50.

The external state checking step 51 may include a serial number recognizing step S52 and an index checking step S53 as shown in FIG. 2. The serial number recognizing part and the index checking part 53 shown in FIG. Lt; / RTI >

The serial number recognizing unit 52 photographs the serial number of the rotary part, extracts the serial number from the data base 30, identifies the position of the rotary part photographed inside the rotary device, (A5).

If, for example, the serial number of the turbine part of the turbine part of the rotor of the gas turbine is 100 units, as in the example described above, then 102 is taken to mean that the rotating part is the same as what is recognized as the bearing used in the turbine part of the rotor. The serial number recognizing unit 52 extracts this information from the pre-stored database unit 30 and identifies that it is the bearing indicated by the serial number 102 mounted on the turbine part of the rotor to check the current part status.

Next, the index checking unit 53 sequentially captures the indexes of the rotating parts and confirms the state of each part of the rotating parts (A6).

For example, in the above-mentioned bearing of the serial number 102 (see FIG. 7), the index identification number or the number sequentially written on the roll is photographed, and at the same time, the external state of the roll is photographed. That is, the index checking unit 53 can photograph the states of 14 rolls in total, so that it is possible to comprehensively check the external states of the respective rolls. Of course, when it is desired to inspect only a specific region through an angle mark on an inner ring and an outer ring of a bearing, it is possible to determine which portion is more accurately used as one photographing reference point.

Referring back to FIG. 2, the internal state checking step S54 may include an eddy current induction step. This eddy current induction step is performed in the eddy current induction unit 55 shown in Fig.

The eddy current induction step may be a step of inducing an eddy current to the rotating component and detecting the presence or absence of cracks and the size of the rotating component through the change of the eddy current distribution state in the internal crack of the rotating component. Here, the rotating part is generally realized by a metal having electrical conductivity, and the user generates an eddy current in the flaw part of the rotating part by flowing a high frequency current to the excitation coil. If there is an internal crack, the distribution state of the eddy current changes . Which indirectly detects the position and size of the crack (A7).

The current application method used at this time may be similar to the principle of the eddy current test. The internal state inspection step detects the presence or absence of internal cracks and the size of the rotating component in the same manner as described above.

Next, referring to FIGS. 1 and 5, the state data storing step S60 may be a step A9 of storing the current state of the inspected rotating parts in the form of data (A9) Can be performed.

When the inspection unit 50 recognizes the serial number of the rotating part and the index display of the specified rotating part completes the external photographing and the internal crack inspection for each part, the current state data for the specific rotating part is stored in the database 30, The serial number, and the inductance file, which are stored in the memory, and are collectively stored as one data.

Next, referring to FIGS. 1 and 5, the maintenance determination step S70 may be a step of determining whether maintenance of the rotary part is to be performed by comparing the stored state data with the limit use value, Can be performed by the repair determination unit 70. The maintenance determining unit 70 may include a limit value extracting unit 71, an external state determining unit 72, and an internal state determining unit 73. Referring to FIG. 3, the maintenance decision step S70 may be subdivided into a limit use value information extraction step S71, an external state determination step S72 and an internal state determination step S73 .

First, the limit use value information extracting unit 71 may perform a limit use value information extracting step of extracting the limit use value information previously input, and the limit use value information extracting unit 71 may extract the limit use value of the specific rotating parts set in the limit unit 40 (A10), which is obtained through the serial number and index information given for each rotary part.

That is, the allowable limit wear rate or the allowable limit crack size information is extracted for each rotating component.

Next, the external state determination unit 72 performs an external state determination step of comparing the state information of each part of the rotating component photographed in the external state checking step of the rotating component and the limit use value information. (A11, A12), the necessity of replacing the rotating parts is judged by comparing the wear degree of the current external state of the rotating part, the presence / absence of the crack occurrence and the size with the initial data value and the set limit use value.

The internal state determination unit 73 performs an internal state determination step of comparing the internal crack size measured in the internal state checking step of the rotating part with the limit use value information. (A13, A14), the necessity of replacing the rotating parts is also determined by comparing the presence / absence of the internal crack of the rotating part with the initial data value and the set limit use value.

For example, if the allowable wear rate in the tooth 210, which is a region where a specific index is indicated in a gear (see FIG. 6) as a rotary part having a specific serial number, is set to 60% based on the initial data value, 72 determines whether the wear rate has been exceeded through the current state of the gear 210 of the specific gear and sends a signal to the control unit 100 when the wear rate is exceeded to notify the user of maintenance necessity. Conversely, if the wear rate is less than 60%, it means that no maintenance is required.

In this case, the control unit 100 automatically repeats the progress of the inspection of the rotating parts automatically (A12? A5) by a user manually or by a predetermined inspection cycle.

In another example, the permissible internal crack size at the roll 320, which is the part where the specific index is indicated in the bearing (see FIG. 7), which is a rotating part having a specific serial number, is set to an initial data value (assuming no cracks) The internal state determining unit 73 determines whether the allowable crack size has been exceeded through the state data of the current roll 320. If the exceeded crack size is exceeded, the internal state determining unit 73 outputs a signal to the control unit 100 To inform the user of the need for maintenance. Conversely, if there is no crack or the size is less than the limit use value, maintenance is not required.

In this case, the control unit 100 automatically repeats the progress of the inspection of the rotating parts automatically (A14? A7) in accordance with a predetermined inspection cycle by the user.

The present invention can improve the operating efficiency of the rotating machine by precisely monitoring the inner and outer states of the rotating parts through the above-described steps and system.

The above items are only specific examples of the inspection method of the rotating machine.

Therefore, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. do.

10: Serial number government
20: Index designation
30:
40:
50:
51:
52: Serial number recognition unit
53: Index checker
54:
55: eddy current induction portion
70: Maintenance decision part
71: limit use value information extracting unit
72:
73: internal state judging unit
100:

Claims (13)

A serial number assigning step of assigning a serial number to the rotating component to identify the rotating component;
An index display step of displaying a plurality of indexes at predetermined intervals on the rotary part to which the serial number is assigned;
An initial data storing step of storing and storing the initial state of the rotating component indicated by the index;
Setting a limit use value of the rotating component based on the stored initial data;
A step of checking the current state of the rotating parts to inspect the current state of each part of the rotating parts;
A state data storing step of storing the current state of each part of the inspected rotating parts by data; And
A maintenance determining step of determining whether to maintain the rotating parts by comparing the stored state data with a limit use value;
And rotating the rotating part.
The method according to claim 1,
Wherein the index display step displays an identification symbol at a predetermined interval along the circumferential direction of the rotating component.
The method according to claim 1,
The method of claim 1,
Wherein the allowable limit wear rate or the limit crack size is set for each of the areas where each index is indicated on the rotating part.
The method according to claim 1,
The step of inspecting the present state of the rotating parts includes:
An external condition inspection step of a rotating component for inspecting an external condition through external photographing of the rotating component; And
Inspecting the internal state of the rotating component by inducing an eddy current on the rotating component;
And rotating the rotating part.
5. The method of claim 4,
The step of inspecting the external condition of the rotating part includes:
A serial number recognition step of photographing and recognizing the serial number of the rotating part; And
An index inspecting step of sequentially photographing the indexes of the rotating parts and confirming the state of each part of the rotating parts;
And rotating the rotating part.
6. The method of claim 5,
Wherein the step of inspecting the internal state of the rotating component comprises:
Wherein the eddy current induction step induces an eddy current to the rotating component to determine the position and size of the internal crack of the rotating component through eddy current distribution.
The method according to claim 6,
The maintenance determination step may include:
Extracting a limit use value information extracting step of extracting limit use value information previously input;
An external state determination step of comparing the state information of each part of the rotary part photographed in the external state inspection step of the rotary part with the limit use value information; And
An internal state determination step of comparing the internal crack size measured in the internal state inspection step of the rotating part with the limit use value information;
And rotating the rotating part.
A serial number assigning unit for assigning a serial number to the rotating part to identify the rotating part;
An index specifying unit for specifying an index at a predetermined interval along the circumferential direction on the rotary part having the serial number designated;
An inspection unit for inspecting a current state of each rotating part;
A database unit for storing and storing the initial state and the current state of the rotary part;
A limit unit for setting a limit use value of the rotating component based on the stored initial state data of the rotating component; And
A maintenance determining unit for determining whether to maintain the rotating parts by comparing the current state data of the stored rotating parts with the limit use value;
And an inspection system for a rotating part.
9. The method of claim 8,
Wherein the limit unit sets the allowable limit wear rate or the limit crack size for each part where each index is indicated on the rotating part.
The method according to claim 1,
Wherein,
An external condition check unit for checking the external condition through external photographing of the rotating part; And
An internal state inspecting unit for inspecting the internal state by inducing an eddy current to the rotating component;
And a control unit for controlling the rotation of the rotary part.
11. The method of claim 10,
The external condition checking unit
A serial number recognizing unit for photographing and recognizing the serial number of the rotary part; And
An index checking unit sequentially photographing the indexes of the rotating parts and confirming the states of the rotating parts;
And a control unit for controlling the rotation of the rotary part.
12. The method of claim 11,
The internal state checking unit,
And an eddy current induction part for inducing an eddy current to the rotating part to determine the position and size of the internal crack through the eddy current distribution.
13. The method of claim 12,
The maintenance determining unit
A limit use value information extracting unit for extracting limit use value information previously input;
An external state determination unit for comparing the state information of each part of the rotary part photographed by the external state inspection unit and the limit use value information; And
An internal state judging unit for comparing the crack size measured by the internal state checking unit and the limit use value information;
And a control unit for controlling the rotation of the rotary part.

Images