CN213813456U - Special ultrasonic detection tool for blade root of inner arc surface of compressor moving blade - Google Patents
Special ultrasonic detection tool for blade root of inner arc surface of compressor moving blade Download PDFInfo
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- CN213813456U CN213813456U CN202022710719.8U CN202022710719U CN213813456U CN 213813456 U CN213813456 U CN 213813456U CN 202022710719 U CN202022710719 U CN 202022710719U CN 213813456 U CN213813456 U CN 213813456U
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Abstract
The utility model discloses a special ultrasonic detection tool for the blade root of the inner cambered surface of a moving blade of a compressor, which comprises a profiling support frame (1), a guide body (2), a probe clamping module (3) and a stroke driver (4); wherein, profile modeling support frame (1) is connected with guide body (2), and guide body (2) one end is connected with probe centre gripping module (3), and the guide body (2) other end is connected with stroke driver (4). The utility model discloses can carry out moving blade intrados blade root full automatization ultrasonic testing under the cylinder body condition is not taken off to the compressor during the unit is faced to stop, the probe is stable not to rock, and it is fixed to sweep the route of looking for, stroke accurate positioning.
Description
Technical Field
The utility model belongs to the technical field of the supersound nondestructive test, specifically a special frock of compressor moving blade intrados blade root ultrasonic testing.
Background
The moving blade of the gas compressor is a core component of the gas compressor for applying work to gas at the inlet of the gas turbine and consists of a blade body and a blade root, wherein the blade body is a part of the blade interacting with airflow, and the blade root is a part of the blade assembled in a rotor disk groove, and a dovetail blade root is generally adopted. The moving blades of the gas compressor are subjected to complex alternating stress in the service process of a rotating machine, and crack defects are easily generated at the variable cross-section positions of the back arc surface and the inner arc surface of the dovetail-shaped blade root, so that the safe and stable operation of a unit is seriously influenced. Therefore, in order to ensure the safe reliability of the compressor moving blade of the gas turbine, the nondestructive detection of the blade root of the compressor moving blade is very necessary. Particularly, under the condition that the moving blade is not disassembled and overhauled, the effective detection of the crack defects of the blade roots of the inner arc surface and the back arc surface becomes the key point concerned by research and development personnel of the operation and maintenance technology of the current combustion engine.
The ultrasonic detection has the advantages of being not easily limited by the shape and the size of the part, strong field adaptability, simple device operation, no potential damage to human body, high accuracy of detection result, good repeatability and the like, and is very suitable for the field non-disassembly in-situ detection of the part with a complex structure. Ultrasonic detection device and method for blade root of moving blade (patent number US7302851B2) applied by foreign companies are coupled in inner arc surface of blade body through probe, sound wave passes through blade body and reaches back arc surface blade root area for detection, and the ultrasonic detection device and method are only suitable for back arc surface blade of moving bladeAnd (3) performing ultrasonic detection, and for an intrados blade root, because the width of the platform of the intrados blade root is large (about 5-15 mm wide), a path for the sound beam to propagate from the blade body to the blade root is not provided, and the method and the device cannot be implemented. In view of the fact that the width of the intrados blade root platform is large, the condition that the ultrasonic probe is directly placed at the position is achieved, manual scanning can be conducted on the intrados blade root platform through the micro phased array ultrasonic linear longitudinal wave straight probe, sound waves are vertically propagated downwards and spread for a certain angle, and effective detection of crack defects of variable cross-section positions of the intrados blade root of the moving blade can be achieved. However, because the size of the used phased array ultrasonic probe is small, the coupling surface is generally only 40mm2～60mm2In manual scanning, a scanning path cannot be fixed, and a probe is easy to shake, so that the stability of an ultrasonic echo signal is poor, and the detection sensitivity and the result repeatability are influenced. Meanwhile, the shape of the intrados blade root platform is irregular, and the transition part between the blade body and the blade root is rounded and interfered, so that the instability during scanning is increased. Meanwhile, the position information of the probe cannot be accurately obtained by manual scanning, and the accurate positioning of the defects is influenced. In addition, manual scanning requires a detector to manually couple the probe in the whole process, and the detector needs to manually bypass the inlet guide vane when the unit is detected during the temporary stop, so that the detection reliability is greatly reduced, and a large amount of manpower and material resources are consumed.
Therefore, the special tool for ultrasonic detection of the inner arc surface blade root of the compressor moving blade is developed, the defects of unstable echo signal and poor repeatability and reliability of a detection result caused by unfixed scanning path and easy shaking of a probe due to manual scanning during ultrasonic detection of the inner arc surface blade root are overcome, automatic scanning of accurate stroke positioning can be realized under the condition that a compressor cylinder body is not uncovered during the temporary stop of a unit, and the special tool is the problem which needs to be solved in the ultrasonic detection of the inner arc surface blade root of the compressor moving blade of the gas turbine at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at needing control probe to stabilize not rocking when present gas turbine moving blade intrados blade root ultrasonic testing sweeps, it is fixed to sweep the route of looking into, stroke accurate positioning, can face the technical demand of full automatization execution during the stop at the unit, a special frock of compressor moving blade intrados blade root ultrasonic testing is provided, the device is simple easy to operate, can realize moving blade intrados blade root ultrasonic testing's full-automatic sweeping under the condition that the compressor cylinder body was not uncovered during the stop at the unit, can avoid sweeping the route unfixed and the probe rocks the detected signal unstability that leads to, result repeatability and reliability are poor, and can realize the real-time accurate positioning of probe stroke position.
The utility model discloses a following technical scheme realizes:
a special ultrasonic detection tool for the blade root of the intrados of a moving blade of a compressor comprises a profiling support frame, a guide body, a probe clamping module and a stroke driver; the profiling support frame is connected with the guide body, one end of the guide body is connected with the probe clamping module, and the other end of the guide body is connected with the stroke driver.
The utility model is further improved in that the profiling support frame comprises an inner cambered surface profile body, a back cambered surface profile body, a suction magnet, a rotating shaft and a first fixing bolt of the moving blade; the inner parts of the inner arc surface imitations and the back arc surface imitations are of variable cross-section curved surface structures and are completely matched with the blade body shape of the moving blade; the bottom shapes of the inner arc surface imitative body and the back arc surface imitative body are consistent with the shape of the moving blade root platform, and a bottom suction magnet is arranged; the inner arc surface profile is provided with a channel for sliding the probe; the outer side edge of the channel is flush with the outer edge of the blade root of the inner cambered surface to be detected; the inner arc surface profile body and the back arc surface profile body are of a split structure, one end of each profile body is rotatably connected through a rotating shaft, and the other end of each profile body is fastened and connected through a first fixing bolt;
the guide body comprises a guide rail, a sliding block, a plane rack and a positioning bolt; the guide rail is connected with the inner cambered surface profile body, positioning bolts are arranged at two ends of the guide rail, and the sliding block is in sliding fit with the guide rail;
the probe clamping module comprises a probe fixing frame, a supporting arm, a stud, a spring, a second fixing bolt, a nut and an ultrasonic probe; the support arm is connected with the guide body sliding block, one end of the stud is connected with the probe fixing frame, the other end of the stud is embedded in a round hole in the head of the support arm, the nut is rotatably arranged at the top of the stud, the spring is sleeved in the stud in a sleeved mode, the second fixing bolt is connected with the probe fixing frame, and the ultrasonic probe is arranged in the probe fixing frame;
the stroke driver comprises a gear, a motor, a bracket, a gear shaft and a third fixing bolt; the support is connected with the guide body sliding block, the motor is connected with the support through a third fixing bolt, one end of a gear shaft is connected with the motor, the other end of the gear shaft is connected with a gear, the gear is meshed with a middle plane rack of the guide body, and the motor is a servo motor and has the functions of driving and coding positioning.
The utility model discloses a further improvement lies in, profile modeling support frame suction magnet is cylindrical neodymium iron boron strong magnet.
The utility model discloses a further improvement lies in, and first fixing bolt is hexagon socket countersunk head bolt.
The utility model discloses further improvement lies in, and the guide body guide rail is single T shape guide rail, and the plane rack is the cylindrical teeth rack.
The utility model discloses a further improvement lies in, and positioning bolt is outer hexagon bolt.
The utility model discloses a further improvement lies in, and the spring is stainless steel coil spring in the probe centre gripping module.
The utility model discloses further improvement lies in, and second fixing bolt is outer hexagon bolt, and the double-screw bolt is the single-end double-screw bolt, and the nut is annular knurl cylinder nut.
The utility model discloses further improvement lies in, and the gear is cylindrical gear among the stroke driver, and the motor is miniature servo motor, and the gear shaft is single bond groove cylindrical shaft, and third fixing bolt is outer hexagon bolt.
The utility model discloses at least, following profitable technological effect has:
the utility model provides a special frock of compressor moving blade intrados blade root ultrasonic testing, can be under the condition that the cylinder body was not taken off to the compressor during the unit faced the stop, carry out moving blade intrados blade root full automatization ultrasonic testing at the horn mouth through opening behind the inlet chamber manhole door, the portable easy operation of frock, can realize the probe and stabilize not rock the coupling, sweep and look into fixed unanimity of route and stroke accurate positioning, the detection speed is fast, the result is accurate reliable, good reproducibility, can greatly improve portability and the reliability of compressor moving blade intrados blade root quality situation monitoring, the safety and stability of guarantee unit moves.
Drawings
Fig. 1 is a schematic structural diagram of the utility model discloses a special frock of compressor moving blade intrados root of blade ultrasonic testing.
FIG. 2 is a sectional view of the utility model discloses a special frock of compressor moving blade intrados root of blade ultrasonic testing.
FIG. 3 is a bottom view of the utility model discloses a special frock of compressor moving blade intrados blade root ultrasonic testing.
FIG. 4 is a view of the installation of the special ultrasonic testing tool for the blade root of the inner arc surface of the moving blade of the compressor on the moving blade.
Description of reference numerals:
1. the device comprises a profiling support frame 2, a guide body 3, a probe clamping module 4 and a stroke driver;
101. an inner arc surface profile body 102, a back arc surface profile body 103, a suction magnet 104, a rotating shaft 105, a first fixing bolt 106 and a channel; 201. a guide rail 202, a sliding block 203, a plane rack 204 and a positioning bolt; 301. a probe mount, 302, a support arm, 303, a stud, 304, a spring, 305, a second fixing bolt, 306, a nut, 307, an ultrasound probe; 401. the gear 402, the motor 403, the bracket 404, the gear shaft 405 and the third fixing bolt.
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 the attached drawings 1, 2, 3 and 4, the utility model provides a special ultrasonic detection tool for the blade root of the inner arc surface of a moving blade of a compressor, which comprises four parts, namely a profiling support frame 1, a guide body 2, a probe clamping module 3 and a stroke driver 4; wherein, profile modeling support frame 1 is connected with guide body 2, and guide body 2 one end is connected with probe centre gripping module 3, and the guide body 2 other end is connected with stroke driver 4.
The profile modeling support frame 1 comprises a moving blade inner arc surface profile 101, a back arc surface profile 102, a suction magnet 103, a rotating shaft 104 and a first fixing bolt 105. The inner parts of the inner cambered surface imitations 101 and the back cambered surface imitations 102 are of variable-section curved surface structures and are completely matched with the blade body shape of the moving blade. The characteristic can ensure the complete fitting of the tool and the blade body of the moving blade, and slight axial shaking cannot be generated in the scanning process. The bottom shapes of the intrados contour 101 and the extrados contour 102 are consistent with the moving blade root platform and are provided with 8 bottom attraction magnets 103. The characteristic can ensure that the tool is fixed in the longitudinal direction of the blade without shaking, and the tool is convenient to disassemble and assemble on site. The intrados profile modeling 101 sets up probe sliding channel 106, and channel 106 outside limit is unanimous with the outer arris limit parallel and level of intrados blade root of being examined, and channel 106 size is unanimous with the probe appearance, for the rectangle structure, and this characteristic can guarantee that the scanning route of probe is fixed unanimous, goes on and does not rock along the blade root platform edge all the time. In addition, the inner arc-surface profile body 101 and the back arc-surface profile body 102 adopt a split structure, one end of the inner arc-surface profile body is rotatably connected through the rotating shaft 104, the rotating shaft 104 is arranged on the inner arc-surface profile body 101 and is sleeved on the back arc-surface profile body 102, the other end of the inner arc-surface profile body is fixedly connected through the first fixing bolt 105, and the inner arc-surface profile body 101 and the back arc-surface profile body 102 are provided with fastening flanges, so that the movable blade detection device is suitable for the movable blade detection under the condition that a cylinder is not opened.
The guide body 2 comprises a guide rail 201, a sliding block 202, a plane rack 203 and a positioning bolt 204. Guide rail 201 is connected with intrados profiling 101, and guide rail 201 both ends set up 2 positioning bolt 204 for sliding block 202 location, this characteristic can guarantee that sliding block 202 can not roll off guide rail 201 and drop in the cylinder body, sliding block 202 and guide rail 201 sliding fit, and the guide rail structure is favorable to guaranteeing the straightness accuracy of stroke and does not have the problem of slip jam.
The probe clamping module 3 comprises a probe holder 301, a support arm 302, a stud 303, a spring 304, a second fixing bolt 305, a nut 306 and an ultrasonic probe 307. The supporting arm 302 is connected with the sliding block 202 of the guide body 2, one end of the stud 303 is connected with the probe fixing frame 301, the other end of the stud 303 is embedded in a round hole in the head of the supporting arm 302, the nut 306 is rotatably installed at the top of the stud 303, the studs 303 are respectively 1 in bilateral symmetry, the spring 304 is sleeved outside the studs 303, the springs 304 are respectively 1 in bilateral symmetry, and the characteristic can ensure that the ultrasonic probe 307 and the blade root platform have enough coupling force and uniform force. The second fixing bolt 305 is connected with the probe fixing frame 301, the number of the second fixing bolts 305 is 1 respectively in the front and back directions, the ultrasonic probe 307 is arranged in the probe fixing frame 301, the ultrasonic probe 307 is fixed by rotating the second fixing bolts 305, the probe fixing frame 301 can be replaced on site, and the ultrasonic probes 307 with different sizes are allowed to be connected into the tool.
The stroke driver 4 includes a gear 401, a motor 402, a bracket 403, a gear shaft 404, and a third fixing bolt 405. The support 403 is connected with the sliding block 202 of the guide body 2, the motor 402 is connected with the support 403 by adopting a third fixing bolt 405, one end of the gear shaft 404 is connected with the motor 402, the other end of the gear shaft 404 is connected with the gear 401, the gear 401 is meshed with the planar rack 203 in the guide body 2, the motor 402 is a servo motor and has the functions of driving and coding positioning, the gear 401 is driven to rotate by the rotation of the motor 402, the sliding block 202 and the ultrasonic probe 307 are driven to move along the channel 106, the meshing structure cannot slip, the transmission efficiency is high, and the accuracy of the stroke position and the smoothness of scanning operation can be ensured.
The suction magnet 103 of the profiling support frame 1 is a cylindrical neodymium iron boron strong magnet which can ensure strong adsorption of the tool and the blade root platform, and the first fixing bolt 105 is an inner hexagonal countersunk head bolt which is convenient for quick assembly and disassembly of the tool on site;
the guide rail 201 of the guide body 2 is a single T-shaped guide rail, the plane rack 203 is a cylindrical tooth rack, and the positioning bolt 204 is an outer hexagon bolt.
The stroke driver 4 is characterized in that the gear 401 is a cylindrical gear, the motor 402 is a miniature servo motor, the gear shaft 404 is a single-key groove cylindrical shaft, the third fixing bolt 405 is an outer hexagon bolt, the servo motor has the functions of driving and positioning, and is high in positioning accuracy and good in use stability.
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, in practical application, the using method of the present invention is as follows:
1. arranging a back cambered surface profile 102 in the profile modeling support frame 1 on a moving blade back cambered surface blade root platform, arranging a rotating shaft 104 of an inner cambered surface profile 101 in a circular hole of the back cambered surface profile 102, arranging the rotating inner cambered surface profile 101 on the moving blade inner cambered surface blade root platform, ensuring the fixation of the profile modeling support frame 1 and the blade root platform through a suction magnet 103, and fixing the back cambered surface profile 102 and the inner cambered surface profile 101 by adopting a first fixing bolt 105;
2. the sliding block 202 in the guide body 2 is inserted into the guide rail 201, the gear 401 in the stroke driver 4 is meshed with the plane rack 203, and a proper amount of lubricating grease is applied;
3. placing the ultrasonic probe 307 in the probe clamping module 3 in the probe fixing frame 301, and screwing the front and rear second fixing bolts 305 to fix the ultrasonic probe 307;
4. sleeving 2 springs 304 outside a stud 303 in the probe clamping module 3, inserting the stud 303 into a round hole at the top of the supporting arm 302, placing an ultrasonic probe 307 in a channel 106 in the profile modeling support frame 1, and then screwing 2 nuts 306 on the top of the stud 303;
5. the ultrasonic probe 307 is connected into a phased array ultrasonic detector host, and the motor 402 is connected into a stroke control host;
6. applying a proper amount of lubricating grease to the channel 106 in the guide body 2 to play a role in coupling the ultrasonic probe;
7. starting detection, starting the motor 402, driving the ultrasonic probe 307 to start scanning along the air inlet edge to the air outlet edge of the driven blade of the channel 106, recording and storing the reflected sound wave at the variable cross section of the blade root platform of the inner arc surface of the moving blade in real time by the host computer of the phased array ultrasonic detector, recording and storing the stroke position of the ultrasonic probe 307 in real time by the stroke control host computer, and then generating an A \ B \ C \ D scanning image for monitoring and judging the quality condition of the blade root of the inner arc surface. If the recheck is needed, the position and the direction of the ultrasonic probe 307 can be adjusted at any time through the stroke control host.
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 special ultrasonic detection tool for the inner arc surface blade root of a moving blade of a compressor is characterized by comprising a profiling support frame (1), a guide body (2), a probe clamping module (3) and a stroke driver (4); wherein, profile modeling support frame (1) is connected with guide body (2), and guide body (2) one end is connected with probe centre gripping module (3), and the guide body (2) other end is connected with stroke driver (4).
2. The special ultrasonic detection tool for the intrados blade root of the moving blade of the compressor as claimed in claim 1, wherein the profiling support frame (1) comprises an intrados profile (101) of the moving blade, a back-arc profile (102), a suction magnet (103), a rotating shaft (104) and a first fixing bolt (105); the inner parts of the inner arc surface imitative body (101) and the back arc surface imitative body (102) are of variable cross-section curved surface structures and are completely matched with the blade body of the moving blade; the bottom shapes of the inner arc surface imitative body (101) and the back arc surface imitative body (102) are consistent with the shape of the moving blade root platform, and a bottom suction magnet (103) is arranged; the inner arc surface profile (101) is provided with a channel (106) for sliding the probe; the outer side edge of the channel (106) is flush with the outer edge of the blade root of the inner cambered surface to be detected; the inner arc surface profile (101) and the back arc surface profile (102) adopt a split structure, one end of the inner arc surface profile is rotatably connected by a rotating shaft (104), and the other end of the inner arc surface profile is fixedly connected by a first fixing bolt (105);
the guide body (2) comprises a guide rail (201), a sliding block (202), a plane rack (203) and a positioning bolt (204); the guide rail (201) is connected with the inner arc surface profile modeling body (101), positioning bolts (204) are arranged at two ends of the guide rail (201), and the sliding block (202) is in sliding fit with the guide rail (201);
the probe clamping module (3) comprises a probe fixing frame (301), a supporting arm (302), a stud (303), a spring (304), a second fixing bolt (305), a nut (306) and an ultrasonic probe (307); the supporting arm (302) is connected with the sliding block (202) of the guide body (2), one end of a stud (303) is connected with the probe fixing frame (301), the other end of the stud (303) is embedded in a round hole in the head of the supporting arm (302), a nut (306) is rotatably installed at the top of the stud (303), a spring (304) is sleeved in the stud (303), a second fixing bolt (305) is connected with the probe fixing frame (301), and an ultrasonic probe (307) is arranged in the probe fixing frame (301);
the stroke driver (4) comprises a gear (401), a motor (402), a bracket (403), a gear shaft (404) and a third fixing bolt (405); the support (403) is connected with the sliding block (202) of the guide body (2), the motor (402) is connected with the support (403) through a third fixing bolt (405), one end of the gear shaft (404) is connected with the motor (402), the other end of the gear shaft (404) is connected with the gear (401), the gear (401) is meshed with the middle plane rack (203) of the guide body (2), and the motor (402) is a servo motor and has the functions of driving, coding and positioning.
3. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the attraction magnet (103) of the profile modeling support frame (1) is a cylindrical neodymium iron boron strong magnet.
4. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the first fixing bolt (105) is a hexagon socket countersunk head bolt.
5. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the guide rail (201) of the guide body (2) is a single T-shaped guide rail, and the planar rack (203) is a cylindrical rack.
6. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the positioning bolt (204) is an outer hexagon bolt.
7. The special ultrasonic detection tool for the intrados root of the compressor moving blade according to claim 2, wherein the spring (304) in the probe clamping module (3) is a stainless steel coil spring.
8. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the second fixing bolt (305) is an outer hexagon bolt, the stud (303) is a single-end stud, and the nut (306) is a knurled cylindrical nut.
9. The special ultrasonic detection tool for the intrados blade root of the compressor moving blade as claimed in claim 2, wherein the gear (401) in the stroke driver (4) is a cylindrical gear, the motor (402) is a micro servo motor, the gear shaft (404) is a single-key groove cylindrical shaft, and the third fixing bolt (405) is an outer hexagon bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710719.8U CN213813456U (en) | 2020-11-20 | 2020-11-20 | Special ultrasonic detection tool for blade root of inner arc surface of compressor moving blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022710719.8U CN213813456U (en) | 2020-11-20 | 2020-11-20 | Special ultrasonic detection tool for blade root of inner arc surface of compressor moving blade |
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| Publication Number | Publication Date |
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| CN213813456U true CN213813456U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022710719.8U Active CN213813456U (en) | 2020-11-20 | 2020-11-20 | Special ultrasonic detection tool for blade root of inner arc surface of compressor moving blade |
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| CN (1) | CN213813456U (en) |
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