A mechanical failure diagnosis device

Abstract

The utility model provides a kind of mechanical fault diagnosis device, belong to mechanical component testing device field.The mechanical component diagnosis device includes measurement module, measurement module includes shell and the transmission rotating shaft rotationally arranged in shell, the one end of transmission rotating shaft is the input end for input torque, the other end of transmission rotating shaft is the output end for with hand shake interface plug-in and output torque, magnetic-restraining body is set on transmission rotating shaft, sensor probe for detecting the magnetic permeability of magnetic-restraining body is equipped in shell.The mechanical fault diagnosis device in the utility model is simple in structure, smaller in size, lighter in weight, improves the portability of the mechanical fault diagnosis device.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical component testing devices, and in particular relates to a mechanical fault diagnosis device. Background Technology

[0002] Disconnecting switches and grounding switches are important high-voltage electrical equipment widely used in power systems. Taking disconnecting switches as an example, see Appendix... Figure 1 The disconnect switch 1 is connected to the operating mechanism 3 via a vertical link 2. The operating mechanism 3 is driven by a motor and is equipped with a hand crank interface for connecting the handle 4.

[0003] Open-type outdoor disconnect switches and grounding switches are exposed to temperature changes, ultraviolet radiation, rain, dust, and various corrosive substances during use. The pins and drive shafts used for transmission are prone to corrosion, which can lead to malfunctions such as jamming and incomplete opening and closing of the disconnect switches and grounding switches. If these malfunctions are not detected and dealt with in a timely manner, they may cause operational failures in the entire power system, thereby affecting the reliable operation of the power grid.

[0004] Mechanical fault diagnosis of disconnecting switches and grounding switches can currently be achieved through methods such as manual observation, torque wrench testing, and testing with specialized equipment. Manual observation involves workers visually inspecting the appearance of each transmission component to determine if there is a fault. This method requires disassembling each transmission component, which is inconvenient and has poor accuracy. The specific steps for torque wrench testing are as follows: the worker connects the torque wrench to the hand-crank interface of the operating mechanism via a transition tool, then rotates the torque wrench and observes the torque value, comparing it to a standard value. If the value is greater than the standard value, there is a potential fault in the operating mechanism. However, the display window rotates during torque wrench rotation, making data observation inconvenient. Furthermore, the uneven rotation speed of the torque wrench when manually rotated leads to poor accuracy of the test results.

[0005] Existing equipment for fault detection of disconnect switches is multifunctional, complex in structure, and large in size and weight. It is suitable for factory testing of electrical equipment but not for routine maintenance of outdoor disconnect switches. A Chinese utility model patent with authorization announcement number CN218330536U discloses a split-type manual operation monitoring instrument for disconnect switches. This instrument includes an independently configured transmission box (i.e., measurement module) and a control box. The transmission box is mounted on a lifting frame, and the transmission box and control box are connected by cables. A torque sensor is installed inside the transmission box. The two ends of the torque sensor's rotating shaft are connected to an output shaft and an input shaft respectively via couplings. The input shaft is connected to a handle, and the output shaft is connected to a hand crank interface. In use, the operator adjusts the lifting frame according to the height of the hand crank interface, then aligns the output shaft of the transmission box with the hand crank interface, and finally manually operates the handle to obtain the torque value required for the operation of the mechanism.

[0006] The torque sensor in the manual operation monitoring instrument for disconnecting switches needs to be a non-contact torque sensor. For example, Chinese invention patent application CN118464259A discloses a torque sensor structure and torque measurement method based on the inverse magnetostrictive effect. The torque sensor includes a support frame (i.e., a housing), a torsion component disposed within the support frame, an amorphous alloy strip disposed on the torsion component, and a torsion measurement component disposed on the inner side of the support frame for detecting the magnetic permeability of the amorphous alloy strip.

[0007] The transmission box in the aforementioned manual operation monitoring instrument for disconnecting switches has its own housing, and the torque sensor inside also has a housing. Therefore, the structure of this manual operation monitoring instrument for disconnecting switches is still relatively complicated, and its size and weight are still relatively large. As a result, it still needs to be supported by a lifting frame during operation, which cannot meet the portability requirements for outdoor operation. Utility Model Content

[0008] The purpose of this invention is to provide a mechanical fault diagnosis device to solve the technical problem that the existing diagnostic devices have complex structures, resulting in large size and weight, which makes them unable to meet the requirements of portability.

[0009] To achieve the above objectives, the technical solution of the mechanical fault diagnosis device provided by this utility model is as follows:

[0010] A mechanical fault diagnosis device includes a measurement module. The measurement module includes a housing and a transmission shaft rotatably disposed within the housing. One end of the transmission shaft is an input end for inputting torque, and the other end of the transmission shaft is an output end for connecting to a hand-cranked interface and outputting torque. A magnetostrictive body is disposed on the transmission shaft, and a sensor probe for detecting the magnetic permeability of the magnetostrictive body is disposed within the housing.

[0011] As a further improvement, the housing is provided with an assembly slot in which the sensor probe is embedded.

[0012] As a further improvement, the sensor probe is integrally cast inside the housing.

[0013] As a further improvement, the input end of the drive shaft is provided with a square slot, the cross-sectional shape and size of which are the same as those of the output end.

[0014] As a further improvement, the housing includes a main housing and end caps located at both axial ends of the main housing. The inner sides of both axial ends of the main housing are provided with mounting grooves for mounting bearings, and the sensor probe is located in the middle of the housing between the two mounting grooves.

[0015] As a further improvement, the housing includes a main housing and a protective shell located on the main housing, and a signal acquisition and processing circuit is provided inside the protective shell for acquiring and processing signals from the sensor tip.

[0016] As a further improvement, the mechanical fault diagnosis device also includes a display module, which is connected to the measurement module via a cable.

[0017] As a further improvement, the mechanical fault diagnosis device also includes a detection battery for powering the display module and the measurement module, with the display module mounted on the detection battery.

[0018] As a further improvement, the mechanical fault diagnosis device also includes a power module, which includes a drive motor, a power battery, and a connector for transmission connection with the input end of the transmission shaft.

[0019] As a further improvement, the power module is an electric screwdriver.

[0020] The beneficial effects are as follows: The mechanical fault diagnosis device provided by this utility model is an improved invention. The measurement module of this mechanical fault diagnosis device has only one shell, which is simpler in structure than the prior art, and its size and weight are greatly reduced, thus improving the portability of the mechanical fault diagnosis device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a disconnector in the prior art;

[0022] Figure 2 This is a schematic diagram showing the usage state of Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0024] Figure 4 This is a front view of the measurement module in Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0025] Figure 5 This is a side view of the measuring module in Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0026] Figure 6 This is a partial cross-sectional view of the measurement module in Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0027] Figure 7 This is a schematic diagram of the measurement principle of the measurement module in Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0028] Figure 8 This is a schematic diagram of the display module in Embodiment 1 of the mechanical fault diagnosis device of this utility model;

[0029] Figure 9 This is a schematic diagram of the power module in Embodiment 1 of the mechanical fault diagnosis device of this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Disconnect switch body; 2. Vertical linkage; 3. Operating mechanism; 31. Hand crank interface; 4. Handle; 5. Measuring module; 51. Housing; 511. Main housing; 512. End cap; 513. Protective housing; 514. Mounting slot; 515. Assembly slot; 52. Drive shaft; 521. Output end; 522. Input end; 523. Slot; 53. Magnetostrictive body; 54. Sensor probe; 55. Signal acquisition and processing circuit; 6. Display module; 7. Cable; 8. Power module; 81. Drive motor; 82. Power battery; 83. Connector; 84. Handle; 85. Speed ​​adjustment device; 9. Detection battery; 91. Charging interface. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the embodiments.

[0033] To address the problems in the existing technology, the basic concept of this utility model is to simplify the structure of the measurement module, thereby reducing its size and weight, and improving the portability of the mechanical fault diagnosis device.

[0034] Specific embodiment 1 of the mechanical fault diagnosis device provided by this utility model:

[0035] See appendix Figure 2 and attached Figure 3 The mechanical fault diagnosis device includes a measurement module 5 and a display module 6, which are connected by a cable 7.

[0036] See appendix Figure 4 Appendix Figure 5 and attached Figure 6 The measuring module 5 includes a housing 51, which comprises a cylindrical main housing 511, end caps 512 fixedly mounted on both axial ends of the main housing 511 by bolts, and a protective shell 513 fixedly mounted on the outside of the main housing 511. A transmission shaft 52 is coaxially arranged inside the main housing 511. One end of the transmission shaft 52 is an input end 522, and the other end is an output end 521. The two end caps 512 have through holes for the input end 522 or the output end 521 to pass through. The input end 522 is flush with the outer surface of the corresponding end cap 512, and the output end 521 protrudes from the corresponding end cap 512. The output end 521 has a quadrangular prism structure, which can be inserted into the hand-crank interface 31 of the disconnector operating mechanism 3 to transmit torque. The input end 522 has a square slot 523, the cross-sectional shape and size of which are the same as those of the output end 521. In other embodiments, the shape and size of the output end 521 and the slot 523 can be adjusted according to the actual shape and size of the hand-crank interface 31.

[0037] The inner sides of both ends of the main housing 511 are provided with mounting grooves 514, and bearings are assembled in the mounting grooves 514. The bearings are used to support the transmission shaft 52 and enable the transmission shaft 52 and the main housing 511 to rotate smoothly relative to each other. The end cover 512 can play the role of axial limiting of the bearing.

[0038] See appendix Figure 7 A magnetostrictive body 53, specifically an amorphous alloy strip, is disposed at the center of the transmission shaft 52. When the transmission shaft 52 is subjected to force at both ends and undergoes torsional deformation, the magnetostrictive body 53 experiences a tangential force, causing a change in its magnetic permeability. A sensor probe 54 for detecting the magnetic permeability of the magnetostrictive body 53 is disposed at the center of the main housing 511. The sensor probe 54 mainly includes a soft magnetic core and an excitation coil. The structure of the sensor probe 54 is similar to that of the torsion measurement assembly in Chinese invention patent application CN118464259A, and will not be described in detail here. Four sensor probes 54 are arranged circumferentially, and four mounting slots 515 are arranged circumferentially on the inner center of the main housing 511, in which the sensor probes 54 are embedded. In other embodiments, the sensor probes 54 may also be integrally cast into the main housing 511.

[0039] The protective housing 513 houses a signal acquisition and processing circuit 55, which is connected to the sensor probe 54 via a wire. The protective housing 513 has a through-hole for a cable 7 to pass through, connecting the signal acquisition and processing circuit 55 to the display module 6. This allows the processed data to be transmitted to the display panel of the display module 6 for operator observation and recording. (See appendix) Figure 8 The cable 7 is also connected to the detection battery 9. The display module 6 is mounted on the detection battery 9. The detection battery 9 is used to power the signal acquisition and processing circuit 55 in the display module 6 and the measurement module 5, as well as each sensor probe 54. The detection battery 9 is a rechargeable lithium battery. The detection battery 9 is also equipped with a charging interface 91 for charging it.

[0040] In use, first insert the output end 521 of the transmission shaft 52 of the measuring module 5 into the hand crank interface 31 of the disconnecting switch operating mechanism 3, and then apply a torque to the input end 522 of the transmission shaft 52. When the transmission shaft 52 rotates stably, the torque value on the transmission shaft 52 can be observed and compared with the standard torque value to determine whether the disconnecting switch operating mechanism 3 has malfunctioned.

[0041] There are two ways to apply torque to the input end 522 of the transmission shaft 52: manual and electric. In the manual method, the original handle 4 of the disconnector operating mechanism 3 is inserted into the slot 523, and then the handle 4 is turned to rotate the transmission shaft 52. In the electric method, a power module 8 is configured for this mechanical fault diagnosis device; see appendix. Figure 9 The power module 8 is an electric screwdriver, which includes a drive motor 81, a power battery 82, and a connector 83 for transmission connection with the input end 522 of the transmission shaft 52. It also has a handle 84 for easy gripping by the operator. The advantage of manual operation is its simpler structure and higher portability; while the advantage of electric operation is its higher rotational stability and higher detection accuracy. In addition, some electric screwdrivers also have a speed adjustment device 85, thus having a speed adjustment function and being able to adapt to more detection scenarios.

[0042] In this mechanical fault diagnosis device, the measurement module 5 and the display module 6 are separated. This allows operators to easily observe and record data during the testing process, and also reduces the weight of the measurement module 5, making it easier to operate. Moreover, compared to existing technologies, the measurement module 5 in this mechanical fault diagnosis device has a simpler structure, smaller size, and lighter weight, making it highly portable and ideal for outdoor testing. Furthermore, the measurement module 5 uses a magnetoelectric torque measurement principle, so the sensor probe 54 does not need to be in direct contact with the transmission shaft 52, and there is no problem of cable tangling, making it convenient to use.

[0043] Specific embodiment 2 of the mechanical fault diagnosis device provided by this utility model:

[0044] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that a dedicated power module is configured for the mechanical fault diagnosis device, which facilitates targeted adjustments to the power module's speed, torque, etc.

[0045] In other embodiments of this example, the dedicated power module can be integrated with the measurement module. For example, the connector of the power module can be fixedly connected to the input end of the transmission shaft of the measurement module, and the housing of the power module and the measurement module can be fixedly connected or integrally formed.

[0046] Specific embodiment 3 of the mechanical fault diagnosis device provided by this utility model:

[0047] This embodiment is based on embodiment 1, but differs from embodiment 1 in that no detection battery is provided in this embodiment. When detection is required, the measurement module and display module are powered by an independent power supply.

[0048] Specific embodiment 4 of the mechanical fault diagnosis device provided by this utility model:

[0049] This embodiment is based on Embodiment 1, but differs in that the display module can be integrated into the measurement module. Specifically, the display panel of the display module can be mounted on the outside of the housing. Since the housing does not rotate with the transmission shaft, the display panel can remain stable, making it convenient for operators to read values.

[0050] Specific embodiment 5 of the mechanical fault diagnosis device provided by this utility model:

[0051] This embodiment is based on embodiment 1. The difference between this embodiment and embodiment 1 is that the signal acquisition and processing circuit is set on the display module, so that the size and weight of the measurement module can be smaller and easier to operate.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical fault diagnosis device, comprising a measurement module, characterized in that, The measurement module includes a housing and a drive shaft rotatably mounted inside the housing. One end of the drive shaft is an input end for inputting torque manually or electrically. The input end is provided with a slot with the same cross-sectional shape and size as the output end. The other end of the drive shaft is an output end for insertion into the hand-cranked interface of the disconnector operating mechanism and outputting torque. A magnetostrictive body is mounted on the drive shaft. A sensor probe for detecting the magnetic permeability of the magnetostrictive body is provided inside the housing. The sensor probe is directly embedded in the assembly slot provided inside the housing or the sensor probe is integrally cast into the housing.

2. The mechanical fault diagnosis device according to claim 1, characterized in that, The housing includes a main housing and end caps located at both axial ends of the main housing. The inner sides of both axial ends of the main housing are provided with mounting grooves for mounting bearings, and the sensor probe is located in the middle of the housing between the two mounting grooves.

3. The mechanical fault diagnosis device according to claim 1, characterized in that, The housing includes a main housing and a protective shell located on the main housing. The protective shell contains a signal acquisition and processing circuit for acquiring and processing signals from the sensor terminal.

4. The mechanical fault diagnosis device according to claim 1, characterized in that, The mechanical fault diagnosis device also includes a display module, which is connected to the measurement module via a cable.

5. The mechanical fault diagnosis device according to claim 4, characterized in that, The mechanical fault diagnosis device also includes a detection battery for powering the display module and the measurement module, with the display module mounted on the detection battery.

6. The mechanical fault diagnosis device according to claim 1, characterized in that, The mechanical fault diagnosis device also includes a power module, which includes a drive motor, a power battery, and a connector for transmission connection with the input end of the transmission shaft.

7. The mechanical fault diagnosis device according to claim 6, characterized in that, The power module is an electric screwdriver.

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