CN216747579U - Reference block for ultrasonic detection of main shaft forging of wind generating set - Google Patents
Reference block for ultrasonic detection of main shaft forging of wind generating set Download PDFInfo
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- CN216747579U CN216747579U CN202123150427.4U CN202123150427U CN216747579U CN 216747579 U CN216747579 U CN 216747579U CN 202123150427 U CN202123150427 U CN 202123150427U CN 216747579 U CN216747579 U CN 216747579U
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Abstract
The utility model discloses a wind generating set main shaft forging ultrasonic detection uses reference block, including six faces: the upper surface is processed into the shape and the overall dimension of a spindle body to be detected; the middle part of the lower surface is provided with a semi-arc groove, the semi-arc groove is concave towards the inside of the test block, and the curvature radius of the semi-arc groove is the same as the radius of a central hole of a spindle to be detected; the lower surface is vertical to the two side surfaces, the front end surface and the rear end surface in pairs; the upper surface is equipped with two sets of rectangular channels, and the side is equipped with the horizontal through-hole of three the same diameter, and the rear end face middle part sets up the flat bottom hole of three different diameters, and lower surface semicircle arc groove top is equipped with the flat bottom hole and a rectangular channel G of three different diameters. The utility model discloses a test block compact structure, it is multiple functional, easy and simple to handle, detect with low costs, efficient.
Description
Technical Field
The utility model relates to a wind generating set main shaft forging contrast test block for ultrasonic detection is applicable to the ultrasonic detection of large-scale fan main shaft forging, belongs to ultrasonic detection technical field.
Background
The main shaft of the fan is an important part for connecting the fan impeller and the gearbox or the generator, and has high requirements on technical parameters and mechanical properties and strict requirements on form and position tolerance and dimensional tolerance. Meanwhile, the main shaft belongs to a rotating part, and bears the stress action of fatigue, bending, torsion, even stretching and the like for a long time, so that fatigue defects are easily generated, a crack source is generated, and finally the main shaft breakage accident is caused. Once the main shaft is broken, the blades and the hub fall from high altitude, and the unit is seriously damaged or even the whole machine is scrapped. At present, a plurality of wind fields have shaft breakage accidents in China, the detection requirement of the main shaft of the fan is increased rapidly, and meanwhile, higher requirements are provided for a nondestructive detection technology. The fan main shaft belongs to large-scale shaft forgings, is large in size and complex in shape, has special structures such as various grooves and reducing parts, has more structural echoes during ultrasonic detection, is not suitable for distinguishing or is easy to submerge in the structural echoes, and is high in sensitivity setting difficulty and difficult in defect judgment. Meanwhile, after the fan main shaft is installed, most of the shaft body is installed inside the gear box and the bearing seat shell, the detection area is very limited, and the ultrasonic detection difficulty is greatly increased, so that the ultrasonic detection of the fan main shaft in service is one of the currently recognized technical problems. At present, two types of commonly used main shaft reference test blocks are provided, one type is a flat-bottom hole test block for a conventional forging, and the other type is that a reference reflector is processed from a finished main shaft or a scrapped main shaft and used as a reference test block. The first type of reference block is used for carrying out sensitivity conversion according to the specification of a main shaft actually detected on site, the calculation is complex, the actual state of the main shaft cannot be really reflected, the detection process verification cannot be carried out, and in addition, echo interference of relevant grooves and structural mutation parts cannot be eliminated. The second test block is a reference reflector directly processed on the main shaft, the method has good detection reduction degree and high precision, but the main shaft has large volume and is not suitable for being carried and used on site, the main shaft of the fan is expensive, and the defect is directly processed to manufacture the reference test block, so that the detection cost is greatly increased.
Disclosure of Invention
The utility model aims to solve the technical problem that to the defect that prior art exists, provide a contrast test block for wind generating set main shaft forging ultrasonic detection, solve current test block suitability, economic nature subalternation problem.
For solving this technical problem, the utility model provides a wind generating set main shaft forging ultrasonic detection uses contrast test block, the whole appearance of contrast test block is rectangular form, including six faces: the spindle comprises an upper surface, two parallel side surfaces, a rear end surface, a front end surface and a lower surface, wherein the upper surface is processed into the shape and the overall dimension of a spindle body to be detected; a semicircular arc groove is formed in the middle of the lower surface, is concave towards the inside of the test block, and has the same curvature radius as the radius of the central hole of the spindle to be detected; the lower surface is vertical to the two side surfaces, the front end surface and the rear end surface in pairs; the upper surface is provided with two groups of rectangular grooves, the side surface is provided with three transverse through holes with the same diameter, the middle part of the rear end surface is provided with three flat bottom holes with different diameters, and the top of the lower surface semi-circular groove is provided with three flat bottom holes with different diameters and a rectangular groove G; in use, the ultrasonic probe a is disposed on the front end face of the reference block, or the ultrasonic probe B is disposed on the upper surface.
Two sets of rectangular channels of upper surface, the rectangular channel of the total three different degree of depth of every group: first group's rectangular channel is located the structure sudden change position near preceding terminal surface, and three rectangular channel is respectively: the rectangular grooves A, B and C are different in depth, and the widths and the lengths of the three rectangular grooves are the same; the second group of rectangular grooves are located at the structure mutation positions close to the rear end face, and the three rectangular grooves are respectively: the three rectangular grooves are different in depth and identical in width and length; the rectangular groove is used for simulating the crack defect of the main shaft.
The rectangular slot is fabricated by electroerosion or other machining methods.
The three transverse through holes with the same diameter on the side surface are respectively as follows: the three transverse through holes are respectively positioned at two structure mutation positions and at the position close to the upper surface of the rear section of the reference block; the transverse through hole is used for setting the sensitivity during the detection of the front end face of the ultrasonic probe and drawing a sensitivity curve.
The flat bottom hole of three different diameters that rear end surface middle part set up does respectively: the hole comprises a flat bottom hole A, a flat bottom hole B and a flat bottom hole C, wherein the three flat bottom holes have the same depth and the centers of the three flat bottom holes are positioned on the same straight line; the flat-bottom hole is used for setting the sensitivity of the ultrasonic probe during detection of the front end face and determining the sensitivity allowance during detection of the front end face.
The flat bottom holes of three different diameters that the lower surface set up do respectively: the hole structure comprises a flat bottom hole D, a flat bottom hole E and a flat bottom hole F, wherein the three flat bottom holes have the same depth and the centers of the three flat bottom holes are positioned on the same straight line; the rectangular groove G is arranged at a position close to the rear end face of the comparison test block, and the direction of the rectangular groove G is perpendicular to the central connecting line of the three flat bottom holes; the flat bottom hole is used for setting the detection sensitivity of the ultrasonic straight probe, and the rectangular groove is used for simulating the crack defect at the central hole of the main shaft.
Has the advantages that: the test block of the utility model has compact structure and complete functions, can simultaneously meet the requirements of phased array instrument equipment debugging, sensitivity setting and detection process verification, does not need to replace different test blocks to calibrate the ultrasonic detection system, and has simple and convenient operation and low detection cost; the structural form that the reference test block and the simulation test block are arranged in the same body is adopted, so that the use is convenient, and the detection efficiency is high; the test block can be processed and manufactured according to the specification and the size of the detected spindle, the structure of the outer surface and the central hole of the detected spindle can be truly reflected, the sound transmission characteristic can be truly reflected, the sensitivity loss in the debugging process of an instrument is made up, the consistency and the consistency of the calibration of a detection system are ensured, and the ultrasonic detection precision is improved; the test block has complete functions, can be used for debugging of a detection system, setting of sensitivity and verification of a detection process, and has low detection cost.
Drawings
FIG. 1 is a schematic view of the upper structure of the present invention;
FIG. 2 is a schematic bottom structure of the present invention;
FIG. 3 is a top view of the test block of the present invention;
FIG. 4 is a schematic front view of the test block of the present invention;
FIG. 5 is an end view of the test block of the present invention;
FIG. 6 is a bottom view of the test block of the present invention;
fig. 7 and 8 are diagrams illustrating examples of the detection of the test block of the present invention.
In the figure: 1. an upper surface; 2. a side surface; 3. a rear end face; 4. a front end face; 5. a lower surface; 11. a rectangular groove A; 12. a rectangular groove B; 13. a rectangular groove C; 14. a rectangular groove D; 15. a rectangular groove E; 16. a rectangular groove F; 21. a transverse through hole A; 22. a transverse through hole B; 23. a transverse through hole C; 31. a flat bottom hole A; 32. a flat bottom hole B; 33. a flat bottom hole C; 51. a flat bottom hole D; 52. a flat bottom hole E; 53. a flat bottom hole F; 54. a rectangular groove G; 6. an ultrasonic probe A; 7. and an ultrasonic probe B.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1-8, the utility model provides a wind generating set main shaft forging ultrasonic testing uses contrast test block, the whole appearance of contrast test block is rectangular form, including six faces: the spindle comprises an upper surface 1, two parallel side surfaces 2, a rear end surface 3, a front end surface 4 and a lower surface 5, wherein the upper surface 1 is processed into the shape and the overall dimension of a spindle body to be detected, and the characteristics of the surface key groove dimension, the overall curvature and the like are the same as those of the spindle to be detected; a semicircular arc groove is formed in the middle of the lower surface 5, is concave towards the inside of the test block, and has the same curvature radius as the radius of the central hole of the spindle to be detected; the lower surface 5 is perpendicular to the two side surfaces 2, the front end surface 4 and the rear end surface 3 in pairs, the two side surfaces 2 are parallel to each other, and the front end surface 4 and the rear end surface 3 are parallel to each other; the upper surface 1 is provided with two groups of rectangular grooves, the side surface 2 is provided with three transverse through holes with the same diameter, the middle part of the rear end surface 3 is provided with three flat bottom holes with different diameters, and the top of the semi-circular groove of the lower surface 5 is provided with three flat bottom holes with different diameters and a rectangular groove G54; in use, the ultrasonic probe A6 is provided on the front end face 4 of the reference block, or the ultrasonic probe B7 is provided on the upper face 1.
The overall dimension of the reference block simulates the structure of the main shaft to be detected, and the reference block can be obtained by machining according to the specification and the dimension of the main shaft to be detected, and can also be obtained by cutting the main shaft bodies of the main shafts to be detected in the same model.
1 two structure mutation positions on upper surface all are provided with a set of rectangular channel, and the rectangular channel of the total three different degree of depth of every group: the first group of rectangular grooves are positioned at the structure mutation position close to the front end surface 4, and the three rectangular grooves are respectively: the rectangular grooves A11, B12 and C13 are different in depth, depth values form an equal difference number array, and the width and the length of the three rectangular grooves are the same; the second group of rectangular grooves are located at the structure mutation positions close to the rear end face 3, and the three rectangular grooves are respectively: the rectangular grooves D14, E15 and F16 are different in depth, depth values form an arithmetic progression, and the three rectangular grooves are the same in width and length; the rectangular groove is used for simulating the crack defect of the main shaft.
The rectangular slot is fabricated by electroerosion or other machining methods.
The three cross through holes with the same diameter on the side surface 2 are respectively as follows: the test block comprises a transverse through hole A21, a transverse through hole B22 and a transverse through hole C23, wherein the three transverse through holes are respectively positioned at two structure mutation positions and at a position, close to the upper surface 1, of the rear section of the test block; the transverse through hole is used for setting the sensitivity during the detection of the front end face of the ultrasonic probe and drawing a sensitivity curve.
The flat bottom hole of three different diameters that 3 middle parts of rear end face set up does respectively: the flat-bottom holes A31, B32 and C33 are the same in depth and are positioned on the same straight line at the centers; the flat-bottom hole is used for setting the sensitivity of the ultrasonic probe during detection of the front end face and determining the sensitivity allowance during detection of the front end face.
The flat bottom holes with three different diameters arranged on the lower surface 5 are respectively: the flat-bottom holes D51, E52 and F53 are the same in depth and are positioned on the same straight line at the centers; the rectangular groove G54 is arranged at a position close to the rear end face 3 of the reference block, and the trend of the rectangular groove G54 is vertical to the central connecting line of the three flat-bottom holes; the flat bottom hole is used for setting the detection sensitivity of the ultrasonic straight probe, and the rectangular groove is used for simulating the crack defect at the central hole of the main shaft.
Wind generating set main shaft forging for ultrasonic testing contrast test block when using, can set up ultrasonic probe A6 on the preceding terminal surface 4 of contrast test block, or set up ultrasonic probe B7 on upper surface 1. The specific implementation mode is as follows:
example 1 an ultrasonic probe A6 was set on the front end face 4 of a comparative block
As shown in fig. 7, the ultrasonic probe a6 is connected with the detector, then the probe is placed on the front end face 4 of the contrast test block, the ultrasonic probe a6 is moved to sequentially find the highest echoes of the transverse through hole a21, the transverse through hole B22 and the transverse through hole C23, and the instrument is operated to record the echoes to produce a detection sensitivity curve; or a flat-bottom hole on the rear end surface 3 of the reference block can be selected to determine the detection sensitivity, and flat-bottom holes similar to the equivalent of the flat-bottom hole A31, B32 and C33 are selected to carry out sensitivity adjustment according to the minimum flat-bottom hole equivalent defect required to be detected specified by the standard; moving the ultrasonic probe A6 to find the highest echo of the flat-bottom hole, operating an instrument to record the echo, setting the sensitivity, completing the sensitivity setting, verifying the detection process, moving the ultrasonic probe A6 on the front end surface 4 of the reference block, and sequentially measuring the reflectors of the rectangular groove A11, the rectangular groove B12, the rectangular groove C13, the rectangular groove D14, the rectangular groove E15 and the rectangular groove F16, wherein the minimum depth of the rectangular groove which can be accurately measured by the detection instrument is the minimum crack depth which can be detected by the ultrasonic detection process.
Example 2 an ultrasonic probe B7 was placed on the upper surface 1 of a comparative block
As shown in fig. 8, the ultrasonic probe B7 is connected with the detector, then the probe is placed on the upper surface 1 of the reference block, the ultrasonic probe B7 is moved to sequentially find the highest echoes of the rectangular groove G54 and the rectangular groove E15, and the instrument is operated to record the echoes to produce a detection sensitivity curve; the detection sensitivity can also be determined by selecting a flat-bottom hole on the lower surface 5 of the reference block, the defect of the equivalent weight of the minimum flat-bottom hole to be detected is specified according to the standard, a flat-bottom hole similar to the equivalent weight of the flat-bottom hole is selected from the flat-bottom hole D51, the flat-bottom hole E52 and the flat-bottom hole F53 for sensitivity adjustment, the ultrasonic probe B7 is placed at the upper part of the flat-bottom hole, the ultrasonic probe B7 is moved to find the highest echo of the flat-bottom hole, the operation instrument is used for echo recording, the detection sensitivity is set, and the calibration of the instrument and equipment is completed.
The utility model discloses the reference test piece upper surface with examine main shaft surface structure and size the same, the lower surface middle part set up and examine the semi-circular arc groove of the same radius of main shaft centre bore, the circular arc groove concave is inside to the test piece. The upper surface and the lower surface of the test block are processed according to the specification and the size of the detected spindle, and the structural form of the detected spindle can be truly reflected; rectangular grooves with different depths are arranged at the abrupt change positions of the upper surface structure and are used for simulating main shaft crack defects; the top of the lower surface semicircular arc groove is provided with flat-bottom holes with different depths and a rectangular groove, the flat-bottom holes are used for setting the sensitivity of the ultrasonic probe when the outer circumferential surface of the detected main shaft is detected, and the rectangular groove is used for simulating the crack defect of the central hole of the main shaft; three transverse through holes with the same diameter are processed at corresponding positions on the side surface and are used for setting the sensitivity during the detection of the front end surface of the ultrasonic probe and drawing a sensitivity curve; the back end face is provided with flat-bottom holes with different diameters, and the flat-bottom holes are used for setting the sensitivity of the ultrasonic probe during detection of the front end face and determining the detection sensitivity allowance; the utility model discloses a structural style compact structure that contrast test block and simulation test block set up with the body, and the reflector sets up rationally, can satisfy ultrasonic detection instrument equipment debugging, sensitivity and set for and detect the technological verification requirement.
The above embodiments of the present invention are merely examples, not the only ones, and all changes within the scope of the present invention or the same range of the present invention are all surrounded by the present invention.
Claims (6)
1. The utility model provides a wind generating set main shaft forging ultrasonic detection uses reference block which characterized in that: the whole appearance of reference block is rectangular form, includes six faces: the detection device comprises an upper surface (1), two parallel side surfaces (2), a rear end surface (3), a front end surface (4) and a lower surface (5), wherein the upper surface (1) is processed into the shape and the overall dimension of a spindle body of a detected spindle; a semi-arc groove is arranged in the middle of the lower surface (5), the semi-arc groove is concave to the inside of the test block, and the curvature radius of the semi-arc groove is the same as the radius of a central hole of a spindle to be detected; the lower surface (5) is vertical to the two side surfaces (2), the front end surface (4) and the rear end surface (3) in pairs; the upper surface (1) is provided with two groups of rectangular grooves, the side surface (2) is provided with three transverse through holes with the same diameter, the middle part of the rear end surface (3) is provided with three flat bottom holes with different diameters, and the top of the semicircular groove of the lower surface (5) is provided with three flat bottom holes with different diameters and a rectangular groove G (54); when in use, the ultrasonic probe A (6) is arranged on the front end surface (4) of the reference block, or the ultrasonic probe B (7) is arranged on the upper surface (1).
2. The wind generating set main shaft forging ultrasonic testing reference block of claim 1, characterized in that: two sets of rectangular channels of upper surface (1), the rectangular channel of the three different degree of depth of every group altogether: first group's rectangular channel is located the structure mutation position near preceding terminal surface (4), and three rectangular channel is respectively: the device comprises a rectangular groove A (11), a rectangular groove B (12) and a rectangular groove C (13), wherein the three rectangular grooves are different in depth, and the three rectangular grooves are the same in width and length; the second group of rectangular grooves are located at the structure mutation positions close to the rear end face (3), and the three rectangular grooves are respectively: the device comprises a rectangular groove D (14), a rectangular groove E (15) and a rectangular groove F (16), wherein the three rectangular grooves are different in depth, and the three rectangular grooves are the same in width and length; the rectangular groove is used for simulating the crack defect of the main shaft.
3. The wind generating set main shaft forging ultrasonic testing reference block of claim 2, characterized in that: the rectangular slot is fabricated by electroerosion or other machining methods.
4. The wind generating set main shaft forging ultrasonic testing reference block of claim 1, characterized in that: the three transverse through holes with the same diameter on the side surface (2) are respectively as follows: the test block comprises a transverse through hole A (21), a transverse through hole B (22) and a transverse through hole C (23), wherein the three transverse through holes are respectively positioned at two structure mutation positions and at a position close to the upper surface (1) of the rear section of the test block; the transverse through hole is used for setting the sensitivity during the detection of the front end face of the ultrasonic probe and drawing a sensitivity curve.
5. The wind generating set main shaft forging ultrasonic testing reference block of claim 1, characterized in that: the flat bottom holes with different diameters arranged in the middle of the rear end face (3) are respectively as follows: the hole structure comprises a flat bottom hole A (31), a flat bottom hole B (32) and a flat bottom hole C (33), wherein the three flat bottom holes have the same depth and the centers of the three flat bottom holes are positioned on the same straight line; the flat-bottom hole is used for setting the sensitivity of the ultrasonic probe during detection of the front end face and determining the sensitivity allowance during detection of the front end face.
6. The wind generating set main shaft forging ultrasonic testing reference block according to any one of claims 1 to 5, characterized in that: the flat bottom holes with three different diameters and arranged on the lower surface (5) are respectively as follows: the hole structure comprises a flat bottom hole D (51), a flat bottom hole E (52) and a flat bottom hole F (53), wherein the three flat bottom holes have the same depth and the centers of the three flat bottom holes are positioned on the same straight line; the rectangular groove G (54) is arranged at a position close to the rear end face (3) of the reference block, and the trend of the rectangular groove G (54) is vertical to the central connecting line of the three flat bottom holes; the flat bottom hole is used for setting the detection sensitivity of the ultrasonic straight probe, and the rectangular groove is used for simulating the crack defect at the central hole of the main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123150427.4U CN216747579U (en) | 2021-12-15 | 2021-12-15 | Reference block for ultrasonic detection of main shaft forging of wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123150427.4U CN216747579U (en) | 2021-12-15 | 2021-12-15 | Reference block for ultrasonic detection of main shaft forging of wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN216747579U true CN216747579U (en) | 2022-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123150427.4U Active CN216747579U (en) | 2021-12-15 | 2021-12-15 | Reference block for ultrasonic detection of main shaft forging of wind generating set |
Country Status (1)
| Country | Link |
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| CN (1) | CN216747579U (en) |
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2021
- 2021-12-15 CN CN202123150427.4U patent/CN216747579U/en active Active
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