CN213398325U - Compressor blade body and blade root radius array eddy current testing device - Google Patents
Compressor blade body and blade root radius array eddy current testing device Download PDFInfo
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- CN213398325U CN213398325U CN202022710401.XU CN202022710401U CN213398325U CN 213398325 U CN213398325 U CN 213398325U CN 202022710401 U CN202022710401 U CN 202022710401U CN 213398325 U CN213398325 U CN 213398325U
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Abstract
The utility model discloses a compressor blade body and blade root radius array eddy current testing device, including main support, bracing piece, movable pulley, probe. The main bracket comprises an upper bracket, a lower bracket, a rotating body and an external bolt; the supporting rod comprises a cylindrical rod, a nut, a spring and a rotation limiting hole; the sliding wheel comprises an upper rotating wheel, a lower rotating wheel, an upper wheel frame and a lower wheel frame; the probe comprises a flexible array eddy current probe, a liquid bag and a profile. The detection steps of the device are as follows: (1) connecting the related components; (2) the height is adjusted to ensure that the profile body is closely attached to the blade body and the blade root in a rounding way; (3) connecting the probe to a host, starting scanning, and observing an impedance signal; (4) during the unit is temporarily stopped, the external control lever can be used for execution. The utility model discloses the device is simple easily to be operated, can face to stop or overhaul the accuracy, high-efficient, the reliable detection of carrying out gas turbine compressor blade body and blade root radius crack defect at the unit during.
Description
Technical Field
The utility model belongs to the technical field of the vortex nondestructive test, specifically a compressor blade body and blade root radius array eddy current testing device.
Background
The compressor blade is one of core components of the gas turbine, is subjected to complex cyclic stress action in the service process, and is very easy to generate crack defects at the typical part of the blade, wherein the blade body and the blade root are rounded to form one of crack high-incidence areas, and a plurality of major faults that the gas turbine is damaged due to sudden fracture of the blade in operation after the compressor blade generates cracks in the area exist in China. Therefore, the supervision and inspection of the quality and health condition of the blades of the compressor in service is one of the essential contents for the daily operation and maintenance and various levels of overhaul of the gas turbine. At present, a fluorescence permeation method or an ultrasonic method is generally adopted for detecting the blade body of the compressor blade, the requirement of the fluorescence permeation method on the surface cleanliness of the blade body is high, the number of detection interference factors is large, and only cracks with large surface opening width can be detected. The ultrasonic method has the advantages of strong field adaptability, high accuracy of detection results, good repeatability and the like, is a preferable reliable method for detecting the blade body of the compressor blade, and easily causes the missing detection or the erroneous judgment of the crack signals in the region because the echo signals of the chamfer angle of the blade root platform are closer to the sound path of the crack echo signals in the region when the blade body and the radius angle region of the blade root are detected. The array eddy current is a novel eddy current detection technology, and the rapid and effective detection of components is realized by the special design of an eddy current detection coil structure and the powerful analysis, calculation and post-processing functions of a computerized eddy current module. Its main advantage shows: (1) the detection coil has larger size and large scanning coverage area; (2) the detection coil is formed by arranging a plurality of independent coils and has consistent detection sensitivity to linear defects in different directions; (3) the probe shape is customized according to the size and the molded surface of the detected part, so that good electromagnetic coupling can be directly formed with the detected part, and the interference of the lift-off effect is greatly reduced.
Therefore, the eddy current detection device for the compressor blade body and blade root radius array is developed, the limitation that a platform chamfer echo is easy to be confused with a crack defect echo of the region when the region is detected by adopting an ultrasonic method at present is overcome, the accurate detection of the compressor blade body and blade root radius crack defect can be carried out during the temporary stop or overhaul period of a unit, and the problem that the missed detection or the misjudgment of the crack defect of the region is urgently needed to be solved at present is avoided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at adopting the ultrasonic method to detect when gas turbine compressor blade body and blade root radius platform chamfer echo easily and this regional crack defect echo obscure at present, cause the limitation of missing of this regional crack defect and examining or misjudgement, a compressor blade body and blade root radius array eddy current testing device is provided, the device is simple easy to operate, can face the accuracy of stopping or carrying out compressor blade body and blade root radius crack defect during the maintenance at the unit, high efficiency, reliably detect, provide technical guarantee for the safe and stable operation of unit.
The utility model discloses a following technical scheme realizes:
a compressor blade body and blade root radius array eddy current testing device comprises a main support, a support rod, a sliding wheel and a probe; the main support comprises an upper support, a lower support and a rotating body, the support rod comprises a cylindrical rod, a nut and a spring, and comprises an upper rotating wheel, a lower rotating wheel, an upper wheel frame and a lower wheel frame;
the upper support and the lower support are connected through a rotating body, the upper support is connected with an upper wheel frame, the lower support is connected with a lower wheel frame, one end of a cylindrical rod is connected with a probe, a spring is sleeved outside the other end of the cylindrical rod and penetrates through the rotating body to be in threaded connection with a nut, and the probe is provided with a profile modeling body.
The utility model discloses further improvement lies in, and the rotator includes the pivot to and the suit is in changeing epaxial swivel sleeve, and upper bracket and lower carriage are connected with the swivel sleeve respectively.
The utility model discloses further improvement lies in, swivel sleeve and pivot all are provided with the angle scale.
The utility model discloses further improvement lies in, is provided with rotatory positioning bolt on every swivel sleeve week, has at least one swivel sleeve week to be provided with external bolt, and external bolt is cylinder external screw thread structure for external control rod.
The utility model discloses a further improvement lies in, the swivel sleeve and the pivot of rotator adopt the bolt location.
The utility model discloses a further improvement lies in, the cylinder pole is worn in the pivot round hole of rotator, is provided with rotatory spacing hole.
The utility model discloses further improvement lies in, and top runner and lower runner are the magnetism wheel, and lower runner is the universal wheel structure that has universal joint.
The utility model discloses further improvement lies in, upward the runner is two magnetism wheels, and lower runner is single magnetism wheel, and the rotatory wheel height all can be adjusted to the upper wheel frame and lower wheel frame, adopts positioning bolt location.
The utility model discloses further improvement lies in, the probe still includes flexible array eddy current probe and liquid bag, the profile modeling body of probe for with blade body and blade root radius shape profile modeling design, liquid bag intermediate layer is connected between profile modeling body and flexible array eddy current probe, just flexible array eddy current probe is coil face array eddy current probe, and 64 is no less than to the coil number.
The utility model discloses at least, following profitable technological effect has:
the utility model provides a compressor blade body and blade root radius array eddy current inspection device, the device is simple easily to operate, can face to stop or carry out the accuracy of gas turbine compressor blade body and blade root radius crack defect during maintenance at the unit, it is high-efficient, reliably detect, the platform chamfer echo that exists when having avoided adopting the ultrasonic method to detect this region is easy to be confused with this region crack defect echo, cause the hourglass of this region crack defect to examine or the limitation of erroneous judgement, provide technical guarantee for the safety and stability operation of unit.
Drawings
Fig. 1 is a front view of the compressor blade body and blade root radius array eddy current inspection device of the present invention.
Fig. 2 is a front view of the compressor blade body and blade root radius array eddy current inspection device of the present invention.
Fig. 3 is a partial view of a probe in the compressor blade body and root rounding array eddy current testing apparatus of the present invention.
Description of reference numerals:
1. the device comprises a main bracket 2, a support rod 3, a sliding wheel 4 and a probe;
101. the device comprises an upper bracket, 102, a lower bracket, 103, a rotating body, 104, an external bolt, 105, a rotating sleeve, 106, a rotating shaft, 107, angle scales, 108 and a rotating positioning bolt; 201. the device comprises a cylindrical rod 202, a nut 203, a spring 204 and a rotation limiting hole; 301. the universal joint comprises an upper rotating wheel 302, a lower rotating wheel 303, an upper wheel frame 304, a lower wheel frame 305, a positioning stud 306 and a universal joint; 401. flexible array eddy current probe, 402, fluid bladder, 403, phantom.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 2 and fig. 3, the utility model provides a pair of compressor blade body and blade root radius array eddy current testing device, including main support 1, bracing piece 2, movable pulley 3 and probe 4.
The main bracket 1 comprises an upper bracket 101, a lower bracket 102, a rotating body 103 and an external bolt 104; the support rod 2 comprises a cylindrical rod 201, a nut 202, a spring 203 and a rotation limiting hole 204; the sliding wheel 3 comprises an upper rotating wheel 301, a lower rotating wheel 302, an upper wheel frame 303 and a lower wheel frame 304; the probe 4 comprises a flexible array eddy current probe 401, a fluid bladder 402 and a phantom 403. The upper support 101 and the lower support 102 are connected through the rotating body 103, the upper support 101 is connected with the upper wheel frame 303, the lower support 102 is connected with the lower wheel frame 304, the upper rotating wheel 301 and the lower rotating wheel 302 are magnetic wheels, the magnetic wheels are designed to enable the device to be tightly attached to the blade body and the blade root, and the array eddy current probe 401 is guaranteed to be tightly attached to a detected area. The lower rotating wheel 302 is a universal wheel structure with a universal joint 306, the design of the universal wheel can realize that the scanning track of the device is consistent with the stroke track of the upper rotating wheel 301 at the blade part, and scanning path deviation caused by the movement interference of the lower rotating wheel 302 is avoided. One end of the cylindrical rod 201 is connected with the probe 4, the other end of the cylindrical rod is sleeved with the spring 203 and then penetrates through the rotating body 103, the elastic expansion of the array eddy current probe can be realized through the spring design, and the coupling stability and the reliability of a detection result are ensured. The rotating body 103 comprises rotating sleeves 105 and rotating shafts 106, each rotating sleeve 105 is circumferentially provided with a rotating positioning bolt 108, at least one rotating sleeve 105 is circumferentially provided with an external bolt 104, the external bolt 104 is of a cylindrical external thread structure and is used for externally connecting an operating lever, the rotating sleeves 105 and the rotating shafts 106 are respectively provided with angle scales 107, the rotating body can realize the rotation of a probe on a scanning plane, the device can adapt to the detection of the rounding of blade bodies and blade roots of compressor blades with different sizes and specifications, and the angle scale design can realize the stabilization of detection parameters and is convenient for compiling process rules. The profile 403 of the probe 4 is designed to be in profile modeling with the shape of a blade body and a blade root, the liquid bag 402 is connected between the profile 403 and the flexible array eddy current probe 401 in an interlayer mode, and the flexible-profile-liquid bag design avoids the problem that detection signals are unstable due to the fact that the coupling between the probe and a rounding area is not tight due to the fact that the profile of the rounding from an air inlet edge to an air outlet edge changes or the device slightly shakes during scanning.
The cylindrical rod 201 penetrates through a round hole of the rotating shaft 106 of the rotating body 103, and a rotation limiting hole 204 is formed, so that the probe can rotate on a vertical axis of the detection surface in a small range due to the design of the limiting hole, the probe is tightly coupled with a detected area in the scanning process, and meanwhile, the problem that the probe is out of position or slides out of a scanning path due to large-range rotation is avoided.
The upper rotating wheel 301 is a double-magnetic wheel, the lower rotating wheel 302 is a single-magnetic wheel, and the single-double-magnetic wheel design utilizes the triangular stability principle, so that the device can be stable and does not shake. The height of the rotating wheel can be adjusted by the upper wheel frame 303 and the lower wheel frame 304, the rotating wheel is positioned by the positioning bolt 305, and the design of adjustable height ensures that the device can adapt to the blade body and blade root rounding detection of the air compressors of different sizes.
The flexible array eddy current probe 401 is a coil surface array eddy current probe, the number of coils is not less than 64, effective detection of crack defects with different orientations can be realized by surface array eddy current design, the 64 coils can ensure full coverage of the crack defects in the rounding area, detection efficiency is improved, and reliability of detection results is ensured.
The utility model provides a pair of compressor blade body and blade root radius array eddy current testing device, during the detection, including following step:
the first step is as follows: installing a probe 4 on a support rod 2, installing the support rod 2 in a main support 1, magnetically connecting an upper rotating wheel 301 with a blade body, and magnetically connecting a lower rotating wheel 302 with a blade root platform;
the second step is that: the heights of the upper wheel frame 303 and the lower wheel frame 304 are adjusted according to the size of the detected blade, so that the profile 403 of the probe 4 is tightly attached to the blade body and the root rounding;
the third step: the probe 4 is connected into a host of the array eddy current detector, the main bracket 1 is pushed manually, scanning is carried out slowly from the air inlet side to the air outlet side, and the eddy current impedance signal characteristics of the host are observed synchronously;
the fourth step: if the detection is executed during the unit temporary stop, an operating lever can be externally connected, and the operating lever bypasses an IGV blade pushing device in the air inlet volute to scan the first-stage moving blade of the air compressor along the air inlet edge to the air outlet edge.
The external bolt 104 of the main bracket 1 is a cylindrical external thread structure and is used for externally connecting an operating lever.
The rotating sleeve 105 and the rotating shaft 106 of the rotating body 103 are positioned by bolts.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. A compressor blade body and blade root rounding array eddy current detection device is characterized by comprising a main support (1), a support rod (2), a sliding wheel (3) and a probe (4);
the main support (1) comprises an upper support (101), a lower support (102) and a rotating body (103), the supporting rod (2) comprises a cylindrical rod (201), a nut (202) and a spring (203), and the supporting rod comprises an upper rotating wheel (301), a lower rotating wheel (302), an upper wheel frame (303) and a lower wheel frame (304);
the upper support (101) is connected with the lower support (102) through a rotating body (103), the upper support (101) is connected with an upper wheel frame (303), the lower support (102) is connected with a lower wheel frame (304), one end of a cylindrical rod (201) is connected with a probe (4), the other end of the cylindrical rod is sleeved with a spring (203) and then penetrates through the rotating body (103) and is in threaded connection with a nut (202), and the probe (4) is provided with a profile modeling body (403).
2. The compressor blade body and root rounding array eddy current testing device as recited in claim 1, characterized in that the rotating body (103) comprises a rotating shaft (106) and a rotating sleeve (105) sleeved on the rotating shaft (106), and the upper bracket (101) and the lower bracket (102) are respectively connected with the rotating sleeve (105).
3. The compressor blade body and root rounding array eddy current testing device as recited in claim 2, characterized in that the rotating sleeve (105) and the rotating shaft (106) are provided with angle scales (107).
4. The compressor blade body and blade root rounding array eddy current testing device as set forth in claim 2, characterized in that each rotating sleeve (105) is circumferentially provided with a rotating positioning bolt (108), at least one rotating sleeve (105) is circumferentially provided with an external bolt (104), and the external bolt (104) is of a cylindrical external thread structure and is used for externally connecting an operating lever.
5. The compressor blade body and root rounding array eddy current testing device as set forth in claim 2, characterized in that the rotating sleeve (105) and the rotating shaft (106) of the rotating body (103) are positioned by bolts.
6. The compressor blade body and root rounding array vortex detecting device as recited in claim 2, characterized in that the cylindrical rod (201) is inserted into a round hole of a rotating shaft (106) of the rotating body (103) and is provided with a rotation limiting hole (204).
7. The compressor blade body and root rounding array eddy current testing device as recited in claim 1, characterized in that the upper rotating wheel (301) and the lower rotating wheel (302) are both magnetic wheels, and the lower rotating wheel (302) is a universal wheel structure with a universal joint (306).
8. The compressor blade body and root rounding array eddy current testing device as recited in claim 7, characterized in that the upper rotating wheel (301) is a double magnetic wheel, the lower rotating wheel (302) is a single magnetic wheel, and the height of the rotating wheels can be adjusted by the upper wheel frame (303) and the lower wheel frame (304) and the rotating wheels are positioned by the positioning bolts (305).
9. The compressor blade body and blade root rounding array eddy current testing device as set forth in claim 1, characterized in that the probe (4) further comprises a flexible array eddy current probe (401) and a liquid bag (402), the profile (403) of the probe (4) is designed in a shape of rounding with the blade body and the blade root, the liquid bag (402) is connected between the profile (403) and the flexible array eddy current probe (401) in an interlayer manner, and the flexible array eddy current probe (401) is a coil surface array eddy current probe, and the number of coils is not less than 64.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710401.XU CN213398325U (en) | 2020-11-20 | 2020-11-20 | Compressor blade body and blade root radius array eddy current testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710401.XU CN213398325U (en) | 2020-11-20 | 2020-11-20 | Compressor blade body and blade root radius array eddy current testing device |
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| CN213398325U true CN213398325U (en) | 2021-06-08 |
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| CN202022710401.XU Active CN213398325U (en) | 2020-11-20 | 2020-11-20 | Compressor blade body and blade root radius array eddy current testing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362730A (en) * | 2020-11-20 | 2021-02-12 | 西安热工研究院有限公司 | Compressor blade body and blade root rounding array eddy current detection device and method |
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- 2020-11-20 CN CN202022710401.XU patent/CN213398325U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362730A (en) * | 2020-11-20 | 2021-02-12 | 西安热工研究院有限公司 | Compressor blade body and blade root rounding array eddy current detection device and method |
| CN112362730B (en) * | 2020-11-20 | 2024-01-23 | 西安热工研究院有限公司 | Device and method for detecting vortex of blade body and blade root rounding array of compressor blade |
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