Ultrasonic probe

Abstract

The application discloses an ultrasonic probe and belongs to the technical field of ultrasonic detection. The main purpose is to improve the accuracy and reliability of detection results. The main technical scheme of the application is that the ultrasonic probe comprises a probe body and a delay wedge, the delay wedge is arranged at the detection end of the probe body, the side surface of the delay wedge away from the probe body is a convex surface, and the convex surface is used for forming surface contact capable of filling gaps by coupling agent when being attached to the arc surface of a shafting component.

Description

Technical Field

[0001] This application belongs to the field of ultrasonic testing technology, and specifically relates to an ultrasonic probe. Background Technology

[0002] Currently, when ultrasonic probes contact the curved surfaces of shaft components, only line contact or localized point contact can be achieved, failing to achieve comprehensive surface contact. This non-surface contact directly prevents the coupling agent from uniformly filling the space between the ultrasonic probe and the curved surfaces of the shaft components, easily leaving air gaps and forming air sandwiches. Since air has a strong attenuating effect on ultrasonic energy, it causes a significant decrease in ultrasonic penetration efficiency, leading to weak detection signals, severe noise interference, and ultimately potentially causing defects on the curved surfaces of the shaft components to be missed, compromising the accuracy and reliability of the detection results. Utility Model Content

[0003] In view of this, this application provides an ultrasonic probe, the main purpose of which is to improve the accuracy and reliability of the detection results.

[0004] To achieve the above objectives, this application mainly provides the following technical solutions: This application provides an ultrasonic probe for detecting the arc surface of a shaft component, including a probe body and a delay wedge. The delay wedge is disposed at the detection end of the probe body, and the side surface of the delay wedge facing away from the probe body is convex. The convex surface is used to form a surface contact that can be filled by a coupling agent when it is in contact with the arc surface of the shaft component.

[0005] Optionally, the edge of the convex surface is provided with an annular guide groove, the two ends of which extend to the side of the delay wedge to guide the coupling agent to fill the gap evenly.

[0006] Optionally, the radius of the convex surface is 49 mm to 51 mm.

[0007] Optionally, the delay wedge is fixedly connected to the probe body, and the delay wedge is used to extend the propagation path of the ultrasonic wave so that the echo and the initial wave form a preset interval distance on the time axis.

[0008] Optionally, the thickness of the delay wedge is 4 mm to 6 mm.

[0009] Optionally, the probe body includes a transmitting crystal and a receiving crystal, wherein the transmitting crystal and the receiving crystal are symmetrically distributed about the plane containing the axis of the probe body.

[0010] Optionally, the probe body further includes a probe housing, and the transmitting crystal and the receiving crystal are disposed inside the probe housing.

[0011] Optionally, the outer surface of the probe housing is provided with anti-slip texture.

[0012] Optionally, the probe body further includes a probe cable connector, which is located at the end of the probe housing away from the delay wedge and is perpendicular to the probe housing.

[0013] Optionally, the coupling agent is engine oil.

[0014] By employing the above technical solution, this application has at least the following beneficial effects: The ultrasonic probe provided in this application, by setting the side of the delay wedge away from the probe body as a convex surface, can fit with the arc surface of the shaft component to form a surface contact that can be filled with coupling agent. This allows the coupling agent to be evenly filled in the gap between the two, avoiding the formation of air gaps due to air residue, reducing the attenuation of ultrasonic energy by air, improving ultrasonic penetration efficiency, thereby enhancing the detection signal strength, reducing noise interference, reducing the missed detection of arc surface defects in the shaft component, and ensuring the accuracy and reliability of the detection results. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an ultrasonic probe according to an optional embodiment of this application; Figure 2 This is a schematic diagram of the structure of a delay wedge block according to an optional embodiment of this application; Figure 3 This is a schematic diagram of the annular guide groove in one optional embodiment of this application.

[0016] The reference numerals in the attached figures are as follows: 1. Probe body; 11. Probe housing; 111. Anti-slip texture; 12. Probe cable connector; 2. Delay wedge; 21. Convex surface; 211. Annular guide groove. Detailed Implementation

[0017] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0021] See Figure 1 and Figure 2 As shown, according to an embodiment of this application, an ultrasonic probe is provided for detecting the arc surface of a shaft component. It includes a probe body 1 and a delay wedge 2. The delay wedge 2 is disposed at the detection end of the probe body 1. The side surface of the delay wedge 2 facing away from the probe body 1 is a convex surface 21. The convex surface 21 is used to form a surface contact that can be filled by a coupling agent when it is in contact with the arc surface of the shaft component.

[0022] The ultrasonic probe provided in the embodiments of this application, by setting the side of the delay wedge 2 away from the probe body 1 as a convex surface 21, can fit with the arc surface of the shaft component to form a surface contact that can be filled with coupling agent, so that the coupling agent is evenly filled in the gap between the two, avoiding the formation of air gaps due to air residue, reducing the attenuation of ultrasonic energy by air, improving ultrasonic penetration efficiency, thereby enhancing the detection signal strength, reducing noise interference, reducing the missed detection of arc surface defects of shaft components, and ensuring the accuracy and reliability of the detection results.

[0023] Specifically, the curved surface of the shaft system components refers to the concave curved surface where the bearing or bush contacts the journal. Due to usage requirements, this type of concave curved surface is usually cast or welded with a tungsten gold layer. It should be noted that the aforementioned ultrasonic probe can be specifically used to detect whether the tungsten gold layer and the bearing or bush are fully bonded, thereby determining whether the connection between the two meets the requirements.

[0024] Here, the ultrasonic probe includes a probe body 1 that transmits and receives ultrasonic signals. A delay wedge 2 is bonded and fixed to the detection end of the probe body 1. The delay wedge 2 is used to conduct ultrasonic waves and optimize the contact state between the probe body 1 and the arc surface of the shaft component.

[0025] Specifically, the surface of the probe body 1 facing away from the probe body 1 is a convex surface 21 that matches the arc surface of the shaft system component. When the convex surface 21 is in contact with the arc surface of the shaft system component, the probe body 1 and the arc surface of the shaft system component are in near-surface contact. At this time, the injected coupling agent can evenly fill the gap between the two and there will be no local gaps.

[0026] In the above embodiments, the coupling agent filling the gap is machine oil. With the help of the good fluidity and wettability of machine oil, the gap between the convex surface 21 of the delay wedge 2 and the arc surface of the shaft component can be filled more fully, further ensuring the uniformity of the coupling agent distribution under surface contact conditions. At the same time, machine oil has stable ultrasonic conduction characteristics, which can reduce the ultrasonic energy loss caused by the unstable performance of the coupling agent, ensuring that the ultrasonic wave penetrates and transmits the signal efficiently, thereby helping to improve the stability and accuracy of the detection signal, and better realize the reliable detection of the arc surface of the shaft component and the bonding state of the tungsten gold layer.

[0027] In the above embodiments, the radius of the convex surface 21 is 49 mm to 51 mm. Based on this, the ultrasonic probe can be adapted to smaller shaft components, enabling it to detect shaft components with a minimum radius of 60 mm, effectively expanding the application range of the ultrasonic probe.

[0028] Here, the radius of the convex surface of the delay wedge 2 can be selected as 49mm, 50mm or 51mm, etc. Among these optional parameters, 50mm is preferred.

[0029] Furthermore, the delay wedge 2 also extends the ultrasonic wave propagation path. This function ensures that the echo generated during the detection process forms a preset interval with the initial wave on the time axis, preventing signal overlap and interference. It's important to note that without the delay wedge 2, the ultrasonic wave propagation path is short, and the interval between the initial wave and the echo on the time axis is extremely small, easily causing them to overlap. The equipment would then be unable to distinguish between the two signals, making it impossible to determine the presence of defects based on the echo. The delay wedge 2 extends the ultrasonic wave propagation path, allowing the initial wave to travel a longer distance before reaching the object being detected. This delays the generation and return time of the echo, ultimately creating a preset interval between the echo and the initial wave on the time axis. The two signals can then be clearly separated, allowing the equipment to accurately capture and analyze the echo, thereby accurately determining the condition of the object being detected.

[0030] Here, the preset interval distance refers to the time interval that allows the initial wave and the echo to not overlap on the time axis, resulting from the increased propagation path of the ultrasonic wave due to the additional passage through the delay wedge 2 with a thickness of 4mm to 6mm. In this embodiment, the thickness of the delay wedge 2 is preferably 5mm.

[0031] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 and Figure 3 As shown, an annular guide groove 211 is provided on the edge of the convex surface 21. The two ends of the annular guide groove 211 extend to the side of the delay wedge 2 to guide the coupling agent to fill the gap evenly.

[0032] In this embodiment, by opening an annular guide groove 211 extending to the side of the delay wedge 2 at the edge of the convex surface 21, the filling effect of the coupling agent in the gap between the convex surface 21 of the delay wedge 2 and the arc surface of the shaft component can be significantly optimized.

[0033] The annular guide groove 211 serves as a channel for the couplant. When the couplant is injected, it can spread rapidly and evenly along the guide groove to the entire contact area between the convex surface 21 and the arc surface. This prevents local gaps caused by the tight fit of the gap, which would make it difficult for the couplant to penetrate to the edge. It also eliminates air gaps caused by residual air, ensuring that the ultrasonic waves can penetrate stably on the entire contact surface and reducing local signal attenuation or noise interference caused by uneven distribution of the couplant. At the same time, the annular guide groove 211 can also store and buffer the couplant, compensating for the small amount of couplant loss that may occur during the detection process due to slight vibration or changes in the bonding pressure. This maintains the stable filling state of the couplant in the gap, ensuring the continuity of the detection process and the stability of the signal. Furthermore, the extension of the annular guide groove 211 to the side of the delay wedge 2 further enhances its guiding and replenishing functions when the ultrasonic probe is moved. When the ultrasonic probe moves along the arc surface of the shaft component, the contact position between the convex surface 21 and the arc surface changes. The coupling agent at the edge of the original contact area may be squeezed to the side due to relative displacement. The structure of the annular guide groove 211 connected to the side allows the squeezed coupling agent to flow back to the new contact gap along the annular guide groove 211. At the same time, the coupling agent that has not entered the gap can also be replenished to the new empty area formed after the movement through the port of the side annular guide groove 211. This avoids the introduction of air due to temporary insufficient coupling agent caused by probe movement, ensuring that the coupling agent is always uniformly filled on the real-time contact surface during the movement, maintaining the stability of ultrasonic penetration efficiency, reducing signal fluctuations or noise interference caused by probe movement, and ensuring the continuity and accuracy of signal acquisition during dynamic detection.

[0034] Here, the annular guide groove 211 is an annular groove formed around the edge of the convex surface 21 of the delay wedge 2, but it is not completely closed end-to-end; instead, two unclosed ends are reserved, which are the two ends of the annular guide groove 211. In this embodiment, these two ends extend to the side of the delay wedge 2, forming the inlet and outlet of the coupling agent. Based on this, during detection, the coupling agent can be injected into the annular guide groove 211 from one end and flow out from the other end, ensuring that the annular guide groove 211 is filled with coupling agent and avoiding gaps that could affect the detection.

[0035] In some possible embodiments disclosed in this application, the probe body 1 includes a transmitting crystal and a receiving crystal, which are symmetrically distributed about the plane containing the axis of the probe body 1.

[0036] In this embodiment, the transmitting and receiving crystals are symmetrically distributed with the plane containing the axis of the probe body 1 as the plane of symmetry. This effectively compresses the length of the probe body 1, significantly improving the adaptability of the ultrasonic probe. Based on this, the ultrasonic probe can be successfully applied to the inspection of shaft components with a minimum radius of 60mm, breaking the limitations of traditional probes in the inspection of small-sized shaft components and further expanding its application scope in the field of shaft component inspection.

[0037] Here, the transmitting crystal is responsible for transmitting ultrasonic signals, and the receiving crystal is responsible for receiving reflected echo signals.

[0038] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the probe body 1 also includes a probe housing 11, and the transmitting crystal and the receiving crystal are disposed inside the probe housing 11.

[0039] In this embodiment, a probe housing 11 is provided, and the transmitting crystal and receiving crystal are placed inside it. The probe housing 11 provides physical protection for the transmitting crystal and receiving crystal, effectively isolating them from interference factors such as dust, moisture, and mechanical collisions in the external environment. This prevents the transmitting crystal and receiving crystal from being damaged or experiencing performance degradation due to external influences, ensuring the stability of the transmitting and receiving functions. At the same time, the probe housing 11 provides a reference for the fixed installation of the transmitting crystal and receiving crystal, ensuring that the symmetrical distribution position and relative attitude of the transmitting crystal and receiving crystal remain accurate. This reduces the deviation of the ultrasonic wave propagation path caused by the displacement of the transmitting crystal and receiving crystal, thereby maintaining the consistency and reliability of the detection signal and providing a structural basis for the accuracy of the arc surface detection of shaft components.

[0040] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the outer surface of the probe housing 11 is provided with anti-slip texture 111.

[0041] In this embodiment, by providing anti-slip textures 111 on the outer surface of the probe housing 11, the friction between the hand and the probe housing 11 is increased, improving the stability of the operator's grip on the ultrasonic probe. Especially when the hand is contaminated with coupling agent during the testing process, it can effectively prevent the ultrasonic probe from accidentally slipping, ensuring the continuity and safety of the operation; at the same time, a stable grip can reduce the shaking of the ultrasonic probe caused by hand slippage during testing, ensuring that the convex surface 21 of the delay wedge 2 and the arc surface of the shaft component always maintain a stable surface contact state, maintaining the uniformity of the coupling agent filling gap, thereby reducing signal fluctuations or noise interference caused by unstable contact, further ensuring the stability and accuracy of the detection signal, and improving operational efficiency and detection reliability.

[0042] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 1 As shown, the probe body 1 also includes a probe cable connector 12, which is located at the end of the probe housing 11 away from the delay wedge 2 and is perpendicular to the probe housing 11.

[0043] In this embodiment, the probe wire connector 12 is located at the end of the probe housing 11 away from the delay wedge 2 and is perpendicular to the housing. This avoids the increased size caused by the traditional in-line connector extending along the probe length direction, effectively shortening the overall length of the ultrasonic probe. This allows the probe to be more flexibly adapted to small space testing scenarios, reducing interference between the probe and surrounding structures due to excessive length. It further improves the spatial adaptability of the probe in the testing of small-sized axial components. At the same time, the vertical layout also facilitates the orderly arrangement of the probe wire, reducing the interference of wire entanglement or pulling during the testing process and ensuring the smoothness of the testing operation.

[0044] Here, the probe connector 12 is used to connect the ultrasonic probe to an external device. For example, it transmits the electrical signal output by the external ultrasonic detector to the transmitting crystal inside the probe body 1, driving the transmitting crystal to generate and emit ultrasonic waves; at the same time, it converts the ultrasonic echo signal received by the receiving crystal, which reflects the arc surface state of the shaft component, into an electrical signal and sends it back to the external detector for analysis and processing to generate test results.

[0045] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An ultrasonic probe, characterized in that, For detecting the arc surface of shaft components, a probe body and a delay wedge are included. The delay wedge is disposed at the detection end of the probe body. The side surface of the delay wedge facing away from the probe body is convex. When the convex surface is in contact with the arc surface of the shaft component, a surface contact can be formed by filling the gap with a coupling agent.

2. The ultrasonic probe according to claim 1, characterized in that, The edge of the convex surface is provided with an annular guide groove, and the two ends of the annular guide groove extend to the side of the delay wedge to guide the coupling agent to fill the gap evenly.

3. The ultrasonic probe according to claim 1, characterized in that, The radius of the convex surface is 49 mm to 51 mm.

4. The ultrasonic probe according to claim 1, characterized in that, The delay wedge is fixedly connected to the probe body. The delay wedge is used to extend the propagation path of the ultrasonic wave so that the echo and the initial wave form a preset interval distance on the time axis.

5. The ultrasonic probe according to claim 4, characterized in that, The thickness of the delay wedge is 4mm to 6mm.

6. The ultrasonic probe according to claim 1, characterized in that, The probe body includes a transmitting crystal and a receiving crystal, and the transmitting crystal and the receiving crystal are symmetrically distributed about the plane containing the axis of the probe body.

7. The ultrasonic probe according to claim 6, characterized in that, The probe body also includes a probe housing, and the transmitting crystal and the receiving crystal are disposed inside the probe housing.

8. The ultrasonic probe according to claim 7, characterized in that, The outer surface of the probe housing is provided with anti-slip texture.

9. The ultrasonic probe according to claim 7, characterized in that, The probe body also includes a probe cable connector, which is located at the end of the probe housing away from the delay wedge and is perpendicular to the probe housing.

10. The ultrasonic probe according to claim 1, characterized in that, The coupling agent is engine oil.

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