Comprehensive nondestructive testing method for internal and external defects of hollow shaft of bullet train

Abstract

The present application relates to the technical field of nondestructive testing, and relates to comprehensive nondestructive testing of inner and outer wall surface and internal defects of a hollow shaft of a high-speed train. A comprehensive testing probe is used, which comprises an integrated array eddy current ultrasonic testing sensor, a micro motor, a comprehensive cable, and a coupling oil supply assembly. The micro motor is arranged on the end of the sensor to control the sensor to make a small swing. The working mode of the coupling oil supply assembly and the sensor is semi-circular circumferential travel detection of the inner hole of the hollow shaft. The sensor swings and adheres to the inner wall of the hollow shaft under the control of the micro motor to perform single-side eddy current and ultrasonic testing. The coupling agent is uniformly coated on the inner wall when the coupling agent is supplied. After completing the whole circumferential detection, an automatic travel is performed until the detection of the whole inner hole of the hollow shaft is completed. The inner and outer wall surface defects and internal defects of the hollow shaft are detected at one time and quickly, the detection efficiency is improved, the detection cost is reduced, and the technical problem of uneven circumferential sensitivity existing in the array eddy current or array ultrasonic testing of the inner hole of the hollow shaft is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of non-destructive testing, in particular to a method for comprehensive non-destructive testing of internal and external surface defects and internal defects of a hollow shaft of a bullet train. BACKGROUND

[0002] Modern railway transportation greatly facilitates people's travel, and its safety is also very important. The current periodic ultrasonic detection of the hollow shaft of the bullet train is one of the links to ensure the safety of operation. However, after more than ten years of operation, the detection technology of the hollow shaft of the bullet train in China mostly adopts the method of mechanically rotating the ultrasonic probe to scan the external fatigue defects of the shaft. The efficiency is low, and it usually takes about twenty minutes to complete the preparation and detection of each shaft. Moreover, it cannot effectively detect the internal fatigue cracks. In practical work, it has been found that there are about 0.5mm deep processing defects on the internal surface of a sample shaft of a hollow shaft production plant, but they have not been found in more than ten years of ultrasonic detection. After array eddy current scanning and endoscopy verification, they were finally detected. In summary, the current mechanical ultrasonic scanning method not only has low efficiency, but also cannot guarantee the detection of all internal and external wall surface defects and internal defects of the hollow shaft. Although with the development of technology, array eddy current detection technology and array ultrasonic / phased array ultrasonic detection technology are gradually replacing the mechanical rotating eddy current scanning or ultrasonic scanning method, but the existing array eddy current or array ultrasonic detection of the hollow shaft still has the problem of uneven circumferential sensitivity. Based on the existing technology, the present application improves to solve the above problems. SUMMARY

[0003] To solve the above problems, the present application provides a method for comprehensive non-destructive testing of internal and external wall surface defects and internal defects of a hollow shaft of a bullet train. The present application is implemented as follows:

[0004] The method for comprehensive non-destructive testing of internal and external wall surface defects and internal defects of a hollow shaft of a bullet train utilizes the integrated technology of internal penetrating array eddy current and array ultrasonic detection, i.e. micro-mechanical scanning method, to realize one-time rapid detection of internal and external wall surface defects and internal defects of the hollow shaft. The specific detection steps include:

[0005] A. Design of comprehensive detection probe:

[0006] The comprehensive detection probe includes an integrated array eddy current ultrasonic detection sensor, a micro motor and a comprehensive cable.

[0007] The integrated array eddy current ultrasonic detection sensor is designed as a cylindrical structure suitable for the size of the hollow shaft, which includes a sensor skeleton, a coupling oil supply assembly arranged in the sensor skeleton, and an array eddy current detection group assembly and an array ultrasonic detection assembly arranged circumferentially along the sensor skeleton.

[0008] The micro motor is arranged on the end of the integrated array eddy current ultrasonic detection sensor, and is used for controlling the integrated array eddy current ultrasonic detection sensor to slightly swing in a certain radial direction and / or to slightly swing around a central axis and to slightly move along an axial direction;

[0009] B, integrated synchronous detection:

[0010] The integrated detection probe in step A is placed in the hollow shaft inner hole, the swing frequency of the micro motor is set, so that the integrated array eddy current ultrasonic detection sensor can slightly swing in a certain radial direction and / or slightly swing around a central axis and slightly move along an axial direction during detection, and meanwhile the coupling oil supply assembly and the working mode of the integrated array eddy current ultrasonic detection sensor are set as a hollow shaft inner hole half-circumferential travel detection mode.

[0011] Further, when the integrated array eddy current ultrasonic detection sensor can slightly swing in a certain radial direction during detection, the hollow shaft inner hole half-circumferential travel detection mode is:

[0012] When the integrated array eddy current ultrasonic detection sensor swings to one side to fit the half-circumferential inner wall of one side of the hollow shaft inner hole, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the half-circumferential inner wall of one side of the hollow shaft inner hole through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the half-circumferential inner wall of one side of the hollow shaft inner hole simultaneously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the half-circumferential inner wall surface of one side of the hollow shaft inner hole and the ultrasonic detection signal of the outer wall surface and the inner part;

[0013] When the integrated array eddy current ultrasonic detection sensor swings to the other side to fit the half-circumferential inner wall of the other side of the hollow shaft inner hole, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the half-circumferential inner wall of the other side of the hollow shaft inner hole through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the half-circumferential inner wall of the other side of the hollow shaft inner hole simultaneously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the half-circumferential inner wall surface of the other side of the hollow shaft inner hole and the ultrasonic detection signal of the outer wall surface and the inner part;

[0014] And after completing the detection of the entire hollow shaft inner hole covered by the integrated array eddy current ultrasonic detection sensor, the integrated detection probe is automatically made to travel in the hollow shaft inner hole along the axial direction until the detection of the entire hollow shaft inner hole is completed.

[0015] Or, when the integrated array eddy current ultrasonic detection sensor is micro-oscillated around the central axis and micro-moved along the axial direction, the hollow shaft inner hole semi-circumferential travel detection mode is:

[0016] When the integrated array eddy current ultrasonic detection sensor is micro-oscillated clockwise and micro-moved along the axial direction to fit the semi-circumferential inner wall of one side of the hollow shaft inner hole, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the semi-circumferential inner wall of one side of the hollow shaft inner hole through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly of the integrated array eddy current ultrasonic detection sensor fitted with the semi-circumferential wall of one side of the hollow shaft inner hole synchronously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the semi-circumferential inner wall of one side of the hollow shaft inner hole and the ultrasonic detection signal of the outer wall surface and the inner part;

[0017] Similarly, when the integrated array eddy current ultrasonic detection sensor is micro-oscillated counterclockwise and micro-moved along the axial direction to fit the semi-circumferential inner wall of the other side of the hollow shaft inner hole, the eddy current detection signal of the semi-circumferential inner wall of the other side of the hollow shaft inner hole and the ultrasonic detection signal of the outer wall surface and the inner part are obtained.

[0018] After completing the detection of the entire circumference of the hollow shaft inner hole covered by the integrated array eddy current ultrasonic detection sensor, the comprehensive detection probe is automatically moved in the hollow shaft inner hole along the axial direction until the detection of the entire hollow shaft inner hole is completed.

[0019] In step A, the design of the comprehensive detection probe, further, a double micro-motor can be used, that is, one micro-motor is arranged on each end of the integrated array eddy current ultrasonic detection sensor, and the oscillation frequencies of the double micro-motors are set to be the same during detection.

[0020] Compared with the prior art, the present application can obtain the following technical effects:

[0021] The present application integrates array eddy current detection technology and array ultrasonic detection technology, and combines micro-movement mechanical scanning mode, and during detection, the comprehensive detection probe is driven to micro-move and deviate in the radial direction on the basis of the array. Specific beneficial effects are:

[0022] One, in the structure design of the probe: the array eddy current and the array ultrasonic are combined in the detection mode of the application, the defects in the inner wall and the outer wall surface and the inside of the hollow shaft are effectively detected, the detection efficiency is greatly improved, the manpower and material resources cost is saved, and the application structure can replace the probe of different specifications and apertures, the probe can be quickly replaced, the time can be saved by more than one time compared with the traditional structure, and the efficiency of the whole detection work is further improved.Compared with the traditional single-probe whole-circle mechanical rotation type detection, the cable twisting problem is avoided, the device stability is higher, the signal coupling noise and failure caused by long-term operation of coupling are avoided, the equipment maintenance cost is greatly reduced, and the high-speed rail / motor train operation safety maintenance cost is reduced.

[0023] Further, the micro motor is arranged on the end of the integrated array eddy current ultrasonic detection sensor, the micro motor can control the integrated array eddy current ultrasonic detection sensor to swing slightly in the radial direction, the array eddy current and array ultrasonic detection methods are combined, the probe lift caused by the eccentric problem of the array detection probe is overcome, the probe center is taken as the shaft to swing slightly up and down or left and right in the radial direction during detection, and the influence of uneven sensitivity generated in ultrasonic and eddy current detection array detection is reduced.

[0024] Further, the integrated cable containing ultrasonic eddy current detection signals, control and coupling agent oil pipes is arranged at the end of the comprehensive probe skeleton, the integrated cable makes the integrity of the probe stronger, the wiring is more regular, the wiring procedure is saved, and the operation safety is improved.

[0025] Secondly, in the detection method, the integrated array eddy current ultrasonic detection sensor with optimized structure is adopted, the defects in the inner wall and the outer wall surface and the inside of the hollow shaft are synchronously detected in an integrated mode, the half-circle type detection is performed in combination with the characteristics of the detection sensor, the detection signal of the half-circle of the sensor and the hollow shaft hole wall is obtained each time, the detection precision of the detection signal is improved, the detection result is more reliable, and the confidence degree is higher. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the application examples or the prior art or the description needed in the prior art, it is obvious that other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0027] In the drawings:

[0028] Figure 1The overall structure schematic diagram of the integrated array eddy current ultrasonic testing sensor of the present application.

[0029] Figure 2 The sectional view of the integrated array eddy current ultrasonic testing sensor arranged in the inner hole of the hollow shaft.

[0030] Figure 3 The schematic diagram of the integrated array eddy current ultrasonic testing sensor arranged in the inner hole of the hollow shaft can be slightly moved in the radial direction.

[0031] Figure 4 The schematic diagram of the integrated array eddy current ultrasonic testing sensor arranged in the inner hole of the hollow shaft can be slightly swung around the central axis of the probe and slightly moved in the axial direction.

[0032] Figure 5 The flow schematic diagram of the testing method of the present application.

[0033] 10 - hollow shaft;

[0034] 20 - comprehensive testing probe, 21 - sensor skeleton, 22 - coupling oil supply assembly, 23 - array eddy current testing assembly, 24 - array ultrasonic testing assembly, 25 - micro motor, 26 - comprehensive cable. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0036] In the existing hollow shaft detection method, the flaw detection of the hollow shaft of the motor train unit is generally performed from the center inner hole, the eddy current detection probe or the ultrasonic detection probe is inserted into the inner hole of the hollow shaft to perform the probe detection in the backward mode, when the traditional single-point probe is used for detection, the rotation detection is performed synchronously when the probe retreats, the detection time is long, the detection efficiency is low, and since the probe needs to be inserted into the coupling line and then connected to the rotary motor, the equipment is prone to failure, and the operation and maintenance cost is high. In order to solve the problem, in the development of technology, ultrasonic phased array detection, array eddy current detection and other designs are appeared, which replace the traditional single-point detection, the ultrasonic phased array probe or the array eddy current probe is inserted into the inner hole of the hollow shaft, and then the probe is pulled back through the pulling device and the detection is completed during the pulling back process. This detection method effectively solves the problems of detection efficiency and equipment failure rate, but in the detection process, the probe may be in an eccentric state, which causes the lifting of some detection positions on the detection probe and the hole wall of the inner hole of the hollow shaft, and affects the accuracy of the detection result.

[0037] At the same time, due to the special structure of the hollow shaft, cracks may exist in the hole wall of the center inner hole, the inner part of the shaft and the outer wall of the shaft, and the existing single eddy current flaw detection or single ultrasonic flaw detection method cannot better detect the internal and external defects of the hollow shaft to realize comprehensive flaw detection.

[0038] The present application researches the detection equipment and detection method of the motor hollow shaft, and aims to solve the existing technical problems. The specific scheme is as follows:

[0039] The internal and external wall surface and internal defect comprehensive nondestructive detection method of the motor hollow shaft 10 realizes one-time rapid detection of the internal and external wall surface defects and internal defects of the hollow shaft by using the integrated array eddy current detection and array ultrasonic detection technology and the micro-mechanical scanning mode. The specific detection steps include:

[0040] A. Design of comprehensive detection probe:

[0041] Referring to the accompanying drawings Figures 1-2 , the comprehensive detection probe 20 includes an integrated array eddy current ultrasonic detection sensor, a micro motor 25 and a comprehensive cable 26.

[0042] The integrated array eddy current ultrasonic detection sensor is designed as a cylindrical structure suitable for the size of the hollow shaft 10, which includes a sensor skeleton 21, a coupling oil supply assembly 22 arranged in the sensor skeleton 21, and an array eddy current detection assembly 23 and an array ultrasonic detection assembly 24 arranged along the circumference of the sensor skeleton 21. The array ultrasonic detection assembly 24 can be arranged at an angle of 45° positive axial, 45° negative axial, 70° positive axial, 70° negative axial, etc. In the embodiment, the ultrasonic detection assembly arranged at an angle of ±45° is preferred.

[0043] The micro motor 25 is arranged on one end of the integrated array eddy current ultrasonic detection sensor, for controlling the integrated array eddy current ultrasonic detection sensor to slightly swing in a certain radial direction thereof and / or to slightly swing around a central axis and to slightly move along an axial direction thereof; the micro motor 24 is externally provided with a packaging shell and is connected with the comprehensive cable 26.

[0044] The comprehensive cable 26 includes signal processing and control lines of the array eddy current detection assembly 23 and the array ultrasonic detection assembly 24, control lines of the micro motor 25, control lines of the sensor skeleton 21 moving speed, and control lines of the coupling oil supply assembly 22, etc., and the lines are arranged in a comprehensive manner, so that the probe structure is better in unity, the line winding during detection is avoided, and the failure risk is reduced.

[0045] Compared with the traditional eddy current detection or ultrasonic detection method, the array eddy current detection and the array ultrasonic detection are integrated, the inner and outer surface defects of the hollow shaft can be effectively detected, the detection efficiency is greatly improved, and the manpower and material resources cost is saved. On the basis of integration, a micro motor is used to provide driving force, so that the comprehensive probe skeleton slightly swings in a radial direction during the movement detection process towards the proximal end of the axle, the detection sensor can be attached to the surface to be detected, and semi-circular circumferential detection is performed, so that the probe eccentricity lifting is effectively overcome. The micro motor swinging mode eliminates the signal coupling line, the equipment stability is good, the uneven circumferential detection sensitivity of the array eddy current detection and the array ultrasonic detection is compensated, and the beneficial effects of multi-dimension are realized through the innovative design.

[0046] B, integrated synchronous detection:

[0047] The comprehensive detection probe in step A is placed in the inner hole of the hollow shaft, the swinging frequency of the micro motor is set, so that the integrated array eddy current ultrasonic detection sensor can slightly swing in a certain radial direction thereof and / or slightly swing around a central axis and slightly move along an axial direction thereof during detection, that is, the integrated array eddy current ultrasonic detection can slightly swing in a certain radial direction thereof, slightly swing around a central axis and quickly move along an axial direction thereof, or slightly swing in a certain radial direction thereof or slightly swing around a central axis and quickly move along an axial direction thereof. At the same time, the working mode of the coupling oil supply assembly and the integrated array eddy current ultrasonic detection sensor is set as a semi-circular circumferential travel detection mode of the inner hole of the hollow shaft.

[0048] Before detection, the comprehensive detection probe is introduced into the front end of the inner hole of the hollow shaft, and semi-circular circumferential travel detection is performed during the travel of the comprehensive detection probe towards the rear end of the inner hole of the hollow shaft.

[0049] The semi-circular circumferential travel detection mode of the inner hole of the hollow shaft is specifically:

[0050] When the integrated array eddy current ultrasonic detection sensor is slightly swinging in a certain radial direction during detection, the hollow shaft bore semi-circumferential travel detection mode is:

[0051] When the integrated array eddy current ultrasonic detection sensor is swinging to one side to fit the semi-circumferential inner wall of one side of the hollow shaft bore, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the semi-circumferential inner wall of one side of the hollow shaft bore through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the semi-circumferential inner wall of one side of the hollow shaft bore simultaneously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the semi-circumferential inner wall of one side of the hollow shaft bore and the ultrasonic detection signal of the outer wall surface and the inner part;

[0052] When the integrated array eddy current ultrasonic detection sensor is swinging to the other side to fit the semi-circumferential inner wall of the other side of the hollow shaft bore, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the semi-circumferential inner wall of the other side of the hollow shaft bore through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the semi-circumferential inner wall of the other side of the hollow shaft bore simultaneously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the semi-circumferential inner wall of the other side of the hollow shaft bore and the ultrasonic detection signal of the outer wall surface and the inner part;

[0053] After completing the detection of the entire circumference of the hollow shaft bore covered by the integrated array eddy current ultrasonic detection sensor, the comprehensive detection probe is automatically made to travel in the hollow shaft bore along the axial direction thereof until the detection of the entire hollow shaft bore is completed.

[0054] The symmetrical detection assemblies of the integrated array eddy current ultrasonic detection sensor are used for alternating detection, and each time, the semi-circumferential detection is performed by the detection assembly that fits one side of the hollow shaft bore, which not only effectively overcomes the detection lift-off of the semi-circumferential wall being detected, ensures that the obtained detection signal is an effective and high-quality signal that meets the detection accuracy requirements, reduces the difficulty of signal processing, and reduces a large amount of interference signal removal work.

[0055] Alternatively, when the integrated array eddy current ultrasonic detection sensor is slightly swinging around the central axis and slightly moving along the axial direction during detection, the hollow shaft bore semi-circumferential travel detection mode is:

[0056] When the integrated array eddy current ultrasonic detection sensor is slightly swung clockwise and micro-moved along the axial direction to fit the half-circumferential inner wall of one side of the hollow shaft hole, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the half-circumferential inner wall of one side of the hollow shaft hole through the oil outlet hole, the array eddy current detection assembly and the array ultrasonic detection assembly of the integrated array eddy current ultrasonic detection sensor fitted with the half-circumferential wall of one side of the hollow shaft hole simultaneously perform eddy current detection and ultrasonic detection, and the surface eddy current detection signal of the half-circumferential inner wall of one side of the hollow shaft hole and the surface and internal ultrasonic detection signal are obtained.

[0057] Similarly, when the integrated array eddy current ultrasonic detection sensor is slightly swung counterclockwise and micro-moved along the axial direction to fit the half-circumferential inner wall of the other side of the hollow shaft hole, the surface eddy current detection signal of the half-circumferential inner wall of the other side of the hollow shaft hole and the surface and internal ultrasonic detection signal are obtained.

[0058] The method of slightly swinging around the axis and micro-moving forward and backward along the probe axial direction is adopted, the filter parameters of the detection instrument are associated, and the circumferential defects of the hollow shaft are better detected.

[0059] In the embodiment, the design of the comprehensive detection probe in step A is further adopted, and double micro-motors are adopted, that is, one micro-motor is arranged on each end of the integrated array eddy current ultrasonic detection sensor, and the swing frequencies of the double micro-motors are set to be the same during detection. The double micro-motors are adopted, the driving forces of the two ends of the integrated array eddy current ultrasonic detection sensor are more uniform when the integrated array eddy current ultrasonic detection sensor is fitted by single-end swinging, the lift-off of each part of the integrated array eddy current ultrasonic detection sensor from the hole wall of the hollow shaft hole tends to be consistent, and the stability of the detection signal is beneficial to be maintained. In the embodiment, the double micro-motors are used to drive the probe to slightly swing in any radial direction or to slightly swing around the central axis and micro-move along the axial direction, and a linear micro-motor can be arranged to drive the whole comprehensive detection probe to move.

[0060] Similarly, when the integrated array eddy current ultrasonic detection sensor slightly swings in a certain radial direction and slightly swings around the central axis and quickly micro-moves along the axial direction, the detection is performed by the detection assembly fitted with the inner wall of the hollow shaft when the sensor is rotated clockwise or counterclockwise or after the sensor is rotated.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A comprehensive non-destructive testing method for internal and external surface defects of a hollow axle of a bullet train, characterized in that, The present application discloses a method for detecting defects on the inner and outer surfaces of a hollow shaft by using an integrated eddy current and ultrasonic array detection technology, i.e., a micro-mechanical scanning method. A. Design of a comprehensive detection probe: The comprehensive detection probe comprises an integrated array eddy current and ultrasonic detection sensor, a micro motor, and a comprehensive cable. The integrated array eddy current and ultrasonic detection sensor is designed as a cylindrical structure suitable for the size of the hollow shaft, and comprises a sensor skeleton, a coupling oil supply assembly arranged in the sensor skeleton, and an array eddy current detection assembly and an array ultrasonic detection assembly arranged along the circumference of the sensor skeleton. The micro motor is arranged at the end of the integrated array eddy current and ultrasonic detection sensor, and is used to control the integrated array eddy current and ultrasonic detection sensor to slightly swing in a certain radial direction and / or to swing around the central axis and to quickly move along the axial direction. B. Integrated synchronous detection: The comprehensive detection probe in step A is placed in the inner hole of the hollow shaft, and the swing frequency of the micro motor is set so that the integrated array eddy current and ultrasonic detection sensor can slightly swing in a certain radial direction and / or swing around the central axis and quickly move along the axial direction during detection, and at the same time, the working mode of the coupling oil supply assembly and the integrated array eddy current and ultrasonic detection sensor is set as a hollow shaft inner hole semi-circumferential travel detection mode. When the integrated array eddy current and ultrasonic detection sensor swings around the central axis and moves along the axial direction during detection, the hollow shaft inner hole semi-circumferential travel detection mode is as follows: When the integrated array eddy current and ultrasonic detection sensor swings clockwise and moves along the axial direction to fit the semi-circumferential inner wall of one side of the hollow shaft inner hole, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current and ultrasonic detection sensor and the semi-circumferential inner wall of one side of the hollow shaft inner hole through the oil outlet hole, and the array eddy current detection assembly and the array ultrasonic detection assembly of the integrated array eddy current and ultrasonic detection sensor that fit the semi-circumferential wall of one side of the hollow shaft inner hole simultaneously perform eddy current detection and ultrasonic detection to obtain the eddy current detection signal of the semi-circumferential inner wall of one side of the hollow shaft inner hole and the ultrasonic detection signal of the outer surface and the inner part. Similarly, when the integrated array eddy current and ultrasonic detection sensor swings counterclockwise and moves along the axial direction to fit the semi-circumferential inner wall of the other side of the hollow shaft inner hole, the eddy current detection signal of the semi-circumferential inner wall of the other side of the hollow shaft inner hole and the ultrasonic detection signal of the outer surface and the inner part are obtained.

2. The method for comprehensive non-destructive testing of the inner and outer surface and internal defects of the hollow axle of a motor train unit according to claim 1, characterized in that, When the integrated array eddy current and ultrasonic detection sensor can slightly swing in a certain radial direction during detection, the hollow shaft inner hole semi-circumferential travel detection mode is as follows: When the integrated array eddy current ultrasonic detection sensor swings to one side to fit the half-circumferential inner wall of the hollow shaft bore, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the half-circumferential inner wall of the hollow shaft bore through the oil outlet hole, the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the half-circumferential inner wall of the hollow shaft bore simultaneously perform eddy current detection and ultrasonic detection, and obtain the eddy current detection signal of the half-circumferential inner wall surface of the hollow shaft bore and the ultrasonic detection signal of the outer wall surface and the inner part; When the integrated array eddy current ultrasonic detection sensor swings to the other side to fit the half-circumferential inner wall of the hollow shaft bore, the coupling oil supply assembly supplies coupling agent to the area between the integrated array eddy current ultrasonic detection sensor and the half-circumferential inner wall of the hollow shaft bore through the oil outlet hole, the array eddy current detection assembly and the array ultrasonic detection assembly in the integrated array eddy current ultrasonic detection sensor that fit the half-circumferential inner wall of the hollow shaft bore simultaneously perform eddy current detection and ultrasonic detection, and obtain the eddy current detection signal of the half-circumferential inner wall surface of the hollow shaft bore and the ultrasonic detection signal of the outer wall surface and the inner part; And after completing the detection of the entire circumference of the hollow shaft bore covered by the integrated array eddy current ultrasonic detection sensor, the comprehensive detection probe is automatically made to travel in the hollow shaft bore along the axial direction thereof until the detection of the entire hollow shaft bore is completed.

3. The comprehensive non-destructive testing method for defects on the inner and outer wall surfaces and internal structure of a hollow axle of a high-speed train according to claim 2, characterized in that, In step A, the comprehensive detection probe can further adopt double micro-motors, i.e., one micro-motor is arranged on each end of the integrated array eddy current ultrasonic detection sensor, and the swing frequencies of the double micro-motors are set to be the same during detection.

Images