CN117798878A - A ship shafting vibration testing device - Google Patents

Abstract

The invention provides a ship shafting vibration testing device, belonging to the technical field of ship shafting vibration testing; including: an installation mechanism, the installation mechanism is provided with two support mechanisms inside, and the two support mechanisms are respectively first supports. mechanism and a second support mechanism. A mounting plate is provided on the side of the first support mechanism. The installation mechanism includes a mounting base plate. A chute is provided on the upper surface of the mounting base plate. A threaded rod is provided inside the chute. One end of the threaded rod passes through the chute and the mounting base plate. The invention can make the installation and disassembly of the device more convenient, and can make the device adaptable to the fixing work of ship shaft systems of different lengths, making the fixing and support of the ship shaft system more convenient.

Description

A ship shafting vibration testing device

Technical field

The invention relates to the technical field of ship shafting vibration testing, and in particular to a ship shafting vibration testing device.

Background technique

The ship shaft system is an important part of the ship's power plant. It is the transmission component between the ship's main engine and the propeller. Shaft system vibration can cause failures in the shaft system, transmission device and main engine, directly affecting the ship's navigation performance and safety. Accurate measurement and time domain, frequency domain and amplitude analysis of the shaft system vibration signal can provide measurement personnel with clear and definite analysis data and graphics, and can also perform shaft system fault diagnosis and performance analysis to improve the safety of ship shaft system operation. Real-time monitoring of shaft system vibration is the most direct means of checking, judging and evaluating the operation status of the shaft system. At the same time, through a large number of shaft system vibration tests, data can be accumulated, the original design technology can be continuously improved, and then the new shaft system design can be guided.

In the current field of shaft system vibration testing, there are various testing methods, which can be roughly divided into three categories: mechanical testing methods, electrical testing methods and optical testing methods. Among them, the electrical measurement method can be divided into two types: contact testing method and non-contact testing method according to whether the test sensor is in contact with the measured shaft system. Mechanical testing methods are rarely used due to low accuracy and poor frequency response; optical testing methods are difficult to be widely used in real ship testing due to complex structures and high prices. Therefore, from the perspective of practical effect, testing accuracy and reliability, the non-contact testing method has greater advantages than other testing methods and is the most widely used.

Most of the existing ship shafting vibration testing devices are unable to support and fix the shafting, thus affecting the final test results. Therefore, this application provides a ship shafting vibration testing device to meet the needs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a ship shafting vibration testing device to solve the problem that some existing ship shafting vibration testing devices cannot support and fix the shafting, thus affecting the final test results.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A ship shafting vibration testing device, including: an installation mechanism. Two support mechanisms are provided inside the installation mechanism. The two support mechanisms are respectively a first support mechanism and a second support mechanism. The first support A mounting plate is provided on the side of the mechanism.

As a preferred scheme of the production process of the present invention, wherein: the mounting mechanism includes a mounting base plate, a slide groove is provided on the upper surface of the mounting base plate, a threaded rod is provided inside the slide groove, one end of the threaded rod passes through the slide groove and the mounting base plate, and extends to the outside of the mounting base plate, a rotating motor is provided at one end of the threaded rod located outside the mounting base plate, the end of the threaded rod away from the rotating motor is rotatably connected to the slide groove, the surface of the threaded rod is provided with threads, and the threads at both ends of the threaded rod are in opposite directions.

As a preferred solution of the production process of the present invention, the surface of the threaded rod is threaded with two moving blocks, and the tops of the two moving blocks are respectively provided with a first installation pipe and a second installation pipe, so Several rings are provided inside each of the first installation pipe and the second installation pipe, slide rails are provided between the rings, and gears are provided inside the slide rails.

As a preferred solution of the production process of the present invention, support rods are provided inside the first installation pipe, a driving motor is provided between the support rods, side plates are provided inside the second installation pipe, and a side plate is provided inside the second installation pipe. A rotating plate is provided on the side of the side plate close to the first installation pipe. The rotating plate is rotationally connected to the side plate. The first installation pipe and the second installation pipe are fixedly connected to the two moving blocks respectively.

As a preferred solution of the production process of the present invention, the support mechanism includes a support plate, and there are two support plates. The support plate is located inside the first installation tube, and a top is provided on the top of the support plate. Guide ring, the bottom of the support plate is provided with a bottom guide ring, the top guide ring and the bottom guide ring are both provided with connection blocks on one side close to the installation plate, and the connection blocks of the top guide ring and the bottom guide ring match each other. , a first fixing bolt is provided inside the fixing block on the side of the top guide ring connecting block, and the first fixing bolt passes through the fixing block on the side of the top guide ring connecting block and the fixing block on the side of the bottom guide ring connecting block. , and the first fixing bolt is threadedly connected to the fixing block on the side of the bottom guide ring connection block.

As a preferred solution of the production process of the present invention, a support assembly is provided between the support plates, and there are two support assemblies, and the two support assemblies are symmetrical along the vertical central axis of the support plate. set up.

As a preferred solution of the production process of the present invention, the support assembly includes two side plates, and there are positioning positions between the two side plates and the two support plates respectively. The positioning plate is fixedly connected to the support plate. Fixed blocks are provided on both sides of the side plate. A second fixing bolt is provided inside the fixing block. The second fixing bolt passes through the positioning block and the positioning block. plate and the support plate, and the second fixing bolt is threadedly connected to the support plate.

As a preferred solution of the production process of the present invention, a cross beam is arranged between the side plates, a clamping ring is arranged below the cross beam, a first clamping block and a second clamping block are arranged on the inner side of the clamping ring, a guide rod is arranged on the side of the first clamping block close to the clamping ring, the guide rod passes through the clamping ring and extends to the inside of the support plate, and the guide rod is slidably connected to the clamping ring and the support plate, and a spring is sleeved on the surface of the guide rod between the first clamping block and the clamping ring.

As a preferred solution of the production process of the present invention, wherein: a rotating rod is provided on the top of the second clamping block, the top of the rotating rod passes through the clamping ring, and a rotating block is provided on the top of the rotating rod, The surface of the rotating rod between the second clamping block and the clamping ring is sleeved with another spring, the rotating rod is threadedly connected to the clamping ring, and the rotating rod is rotationally connected to the top of the clamping ring, so The shaft system components to be measured are arranged inside the clamping ring.

As a preferred solution of the production process of the present invention, a first transverse sensor is provided at the center of the cross beam, a second transverse vibration sensor and a longitudinal vibration sensor are provided at the top of the support plate, and the axis to be measured is A torsional vibration sensor on the shaft surface of the system component is used to sense and transmit the torsional vibration of the axis system component to be measured. The torsional vibration sensor component includes an encoder. The output end of the encoder is connected to a signal collector. The signal The acquisition instrument is connected to the signal acquisition computer. The torsional vibration sensor and the probe of the first transverse sensor are both aligned with the top center of the gear. The probe of the second transverse vibration sensor is aligned with the side center of the gear. The longitudinal vibration sensor The probes are arranged facing each other on both sides of the gear.

Compared with the prior art, the present invention at least has the following beneficial effects:

In the above plan

First, by matching and connecting the connection block at the bottom of the top guide ring with the connection block of the bottom guide ring, and then matching and connecting the fixing block on the side of the connection block, and passing the first fixing bolt through the fixing block, the top guide ring is connected to the bottom guide ring, and the top guide ring and the bottom guide ring are clamped to the support plate, and then the positioning block on the side of the side plate is matched and connected with the positioning plate, and fixed by the second fixing bolt, the support assembly is installed, and then the top guide ring is matched and connected with the guide ring between the bottom guide ring and the circular ring, so that the top guide ring and the bottom guide ring can be rotated between the slide rails, making the installation and disassembly of the device more convenient, and improving the practicality of the device;

2. By passing the ship shafting through the clamping ring, the sides of the ship's shafting are in contact with the first and second clamping blocks, and the first and second clamping blocks are squeezed, Make the first clamping block squeeze the spring, causing the guide rod to slide inside the side plate, and then rotate the rotating block to drive the rotating rod to rotate. Since the rotating rod is threadedly connected to the cross beam, the rotating rod is connected to the second clamping block. The top of the block is rotationally connected, so the rotating rod can drive the second clamping block to move during the rotation, so that the second clamping block comes into contact with the top of the ship's shaft system, so that the ship's shaft system is fixed between the clamping rings. Then the driving motor drives the mounting plate to rotate, so that the mounting plate drives the support mechanism to rotate, causing the top guide ring and the bottom guide ring to rotate inside the slide rail, making the fixing of the ship shaft system more convenient;

3. The threaded rod is driven by the rotating motor to rotate. Since the threaded rod is threadedly connected to the moving block, and one end of the threaded rod is rotationally connected to the inside of the chute, the threaded rod can drive the moving block to move laterally during the rotation, and because The thread directions at both ends of the threaded rod are opposite, and the moving blocks will approach each other during the rotation of the threaded rod. Therefore, the first installation tube and the second installation tube on the top of the moving block can be brought closer to each other, so that the device can adapt to ships of different lengths. Shaft fixing work.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with the description, further serve to explain the principles of the disclosure and enable any person skilled in the relevant art to make and use the disclosure.

Figure 1 is a schematic diagram of the three-dimensional structure of the ship shafting vibration testing device;

Figure 2 is a schematic diagram of the internal structure of the ship shafting vibration testing device;

Figure 3 is a schematic structural diagram of the installation mechanism in the ship shafting vibration testing device;

FIG4 is a structural schematic diagram 1 of the first supporting mechanism in the ship shafting vibration testing device;

Figure 5 is a schematic diagram 2 of the structure of the first support mechanism in the ship shafting vibration testing device;

Figure 6 is a schematic structural diagram of the second support mechanism in the ship shafting vibration testing device;

FIG. 7 is an enlarged view of point A in FIG. 5 .

[reference mark]

1. Installation mechanism; 11. Installation base plate; 12. Rotating motor; 13. First installation tube; 14. Second installation tube; 15. Driving motor; 16. Support rod; 17. Chute; 18. Threaded rod; 19 , moving block; 110, ring; 111, slide rail; 112, side plate; 113, rotating plate; 2, support mechanism; 21, support plate; 22, top guide ring; 23, bottom guide ring; 24, connecting block ; 25. Fixed block; 26. First fixing bolt; 27. Support component; 271. Side plate; 272. Cross beam; 273. First clamping block; 274. Second clamping block; 275. Rotating rod; 276 , rotating block; 277, guide rod; 278, spring; 279, clamping ring; 2710, positioning block; 2711, second fixing bolt; 3, mounting plate.

As shown in the figures, in order to clearly realize the structure of the embodiments of the present invention, specific structures and devices are marked in the figures, but this is only for illustration and is not intended to limit the present invention to the specific structures, devices and environments. , according to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims.

Detailed ways

A ship shafting vibration testing device provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative ways to implement them; and the drawings It is only for the purpose of describing the embodiments more specifically, and is not intended to specifically limit the present invention.

It should be noted that references in the specification to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but Not every embodiment may include a particular feature, structure or characteristic. Additionally, when a particular feature, structure or characteristic is described in connection with an embodiment, it should be within the knowledge of a person skilled in the relevant art to implement such feature, structure or characteristic in conjunction with other embodiments (whether explicitly described or not).

Often, a term can be understood, at least in part, from its usage in context. For example, the term "one or more" as used herein may be used to describe any feature, structure or characteristic in the singular, or may be used to describe a combination of features, structures or characteristics in the plural, depending at least in part on context. Additionally, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on context, allow for the presence of other factors that are not necessarily explicitly described.

It will be understood that the meanings of “on,” “on,” and “over” in this disclosure should be interpreted in the broadest manner, such that “on” not only means "Directly on" something but also "on" something with intervening features or layers in between, and "on" or "over" not only means "on" something "on" or "above" and may also include the meaning of "on" or "above" something without intervening features or layers.

In addition, spatially relative terms such as “under,” “below,” “lower,” “above,” “upper,” and the like may be used herein to describe the relationship between one element or feature and another for convenience of description. The relationship of one or more elements or features as illustrated in the drawings. The spatially relative terms are intended to cover different orientations in use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein interpreted accordingly.

As shown in Figures 1 and 2, an embodiment of the present invention provides a ship shafting vibration testing device, which includes: an installation mechanism 1. Two support mechanisms 2 are provided inside the installation mechanism 1. The support mechanisms 2 are respectively a first support mechanism 2 and a second support mechanism 2. A mounting plate 3 is provided on the side of the first support mechanism 2.

As shown in Figures 1 to 3, the installation mechanism 1 includes a mounting bottom plate 11. A chute 17 is provided on the upper surface of the mounting bottom plate 11. A threaded rod 18 is provided inside the chute 17. The threaded rod One end of 18 passes through the chute 17 and the mounting bottom plate 11, and extends to the outside of the mounting bottom plate 11. The end of the threaded rod 18 located outside the mounting bottom plate 11 is provided with a rotating motor 12, and the end of the threaded rod 18 is away from the rotating motor 12. Rotally connected to the chute 17, the threaded rod 18 is provided with threads on its surface, and the thread directions at both ends of the threaded rod 18 are opposite. The surface of the threaded rod 18 is threaded with two moving blocks 19, and the two moving blocks 19 are threaded. The top of the block 19 is provided with a first installation pipe 13 and a second installation pipe 14 respectively. A plurality of rings 110 are provided inside the first installation pipe 13 and the second installation pipe 14. Between the rings 110 There is a slide rail 111, a gear is provided inside the slide rail 111, a support rod 16 is provided inside the first installation tube 13, a driving motor 15 is provided between the support rods 16, and the output shaft of the driving motor 15 It is fixedly connected to the mounting plate 3. The mounting plate 3 is located between the two support plates 21. The mounting plate 3 is fixedly connected to the support plate 21. The second mounting tube 14 is provided with a side plate 112 inside. A rotating plate 113 is provided on the side of the plate 112 close to the first installation pipe 13. The rotating plate 113 is rotationally connected to the side plate 112. The first installation pipe 13 and the second installation pipe 14 are respectively fixed to the two moving blocks 19. connection, the threaded rod 18 is driven to rotate by rotating the motor 12. Since the threaded rod 18 is threadedly connected to the moving block 19, and one end of the threaded rod 18 is rotationally connected to the inside of the chute 17, the threaded rod 18 can drive the movement during the rotation. The block 19 moves laterally, and since the thread directions at both ends of the threaded rod 18 are opposite, the moving blocks 19 will approach each other during the rotation of the threaded rod 18, so the first installation tube 13 and the second installation tube 13 at the top of the moving block 19 can be The tubes 14 are brought close to each other so that the device can be adapted to the fixing work of ship shafting of different lengths.

As shown in Figures 2, 4, 5, 6, and 7, the support mechanism 2 includes two support plates 21, and the support plates 21 are located on the first installation tube 13. Inside, the top of the support plate 21 is provided with a top guide ring 22, and the bottom of the support plate 21 is provided with a bottom guide ring 23. The top guide ring 22 and the bottom guide ring 23 are both provided on the side close to the mounting plate 3. There is a connecting block 24. The connecting block 24 of the top guide ring 22 and the bottom guide ring 23 match each other. The first fixing bolt 26 is provided inside the fixing block 25 on the side of the connecting block 24 of the top guide ring 22. A fixing bolt 26 passes through the fixing block 25 on the side of the top guide ring 22 connecting block 24 and the fixing block 25 on the side of the bottom guide ring 23 connecting block 24, and the first fixing bolt 26 and the bottom guide ring 23 connecting block 24 The side fixing blocks 25 are threaded, and a support assembly 27 is provided between the support plates 21. There are two support assemblies 27, and the two support assemblies 27 are symmetrical along the vertical central axis of the support plate 21. Set symmetrically, by matching and connecting the connecting block 24 at the bottom of the top guide ring 22 with the connecting block 24 of the bottom guide ring 23, then matching and connecting the fixing blocks 25 on the side of the connecting block 24, and passing the first fixing bolt 26 through Through the fixing block 25, connect the top guide ring 22 and the bottom guide ring 23, so that the top guide ring 22 and the bottom guide ring 23 engage the support plate 21, and then connect the positioning block 2710 on the side of the side plate 271 with the positioning block 2710. The plates are matched and connected and fixed by the second fixing bolt 2711, the support assembly 27 is installed, and then the top guide ring 22, the bottom guide ring 23 and the guide ring 110 are matched and connected, so that the top guide ring 22 and the bottom guide ring 23 can rotate between the slide rails 111, making the installation and disassembly of the device more convenient and improving the practicality of the device.

As shown in Figures 2, 4, 5, and 7, the support assembly 27 includes two side plates 271, and the two side plates 271 are respectively connected with the two side plates 271. Positioning plates are provided between the support plates 21, and the positioning plates are fixedly connected to the support plates 21. Fixed blocks 25 are provided on both sides of the side plates 271, and second fixing bolts 2711 are provided inside the fixed blocks 25. , the second fixing bolt 2711 passes through the positioning block 2710, the positioning plate and the support plate 21, and the second fixing bolt 2711 is threadedly connected to the support plate 21, and a cross beam 272 is provided between the side plates 271, so A clamping ring 279 is provided below the cross beam 272. A first clamping block 273 and a second clamping block 274 are arranged inside the clamping ring 279. The first clamping block 273 is close to the clamping ring 279. A guide rod 277 is provided on one side. The guide rod 277 passes through the clamping ring 279 and extends to the inside of the support plate 21. The guide rod 277 is slidingly connected with the clamping ring 279 and the support plate 21. The first clamp The surface of the guide rod 277 between the holding block 273 and the clamping ring 279 is sleeved with a spring 278. The top of the second clamping block 274 is provided with a rotating rod 275, and the top of the rotating rod 275 passes through the clamping ring 279. , a rotating block 276 is provided at the top of the rotating rod 275. The surface of the rotating rod 275 between the second clamping block 274 and the clamping ring 279 is sleeved with another spring 278. The rotating rod 275 and The clamping ring 279 is threaded, and the rotating rod 275 is rotationally connected to the top of the clamping ring 279. The shaft system component to be measured is provided inside the clamping ring 279, and a first transverse sensor is provided at the center of the cross beam 272. The top of the support plate 21 is provided with a second transverse vibration sensor and a longitudinal vibration sensor. The torsional vibration sensor is used to sense and transmit the torsional vibration of the shaft system component to be measured on the shaft surface of the shaft system component to be measured. , the torsional vibration sensing component includes an encoder, the output end of the encoder is connected to a signal collector, the signal collector is connected to a signal collection computer, the torsional vibration sensing component and the probe of the first transverse sensor are both connected to the gear The top center is aligned, the probe of the second transverse vibration sensor is aligned with the side center of the gear, the probes of the longitudinal vibration sensor are aligned with both sides of the gear, and the ship shaft system is passed through the clamping ring 279 , make the side of the ship shaft system come into contact with the first clamping block 273 and the second clamping block 274, and squeeze the first clamping block 273 and the second clamping block 274, so that the first clamping block 273 squeezes Press the spring 278 to make the guide rod 277 slide inside the side plate 271, and then rotate the rotating block 276 so that the rotating block 276 drives the rotating rod 275 to rotate. Since the rotating rod 275 is threadedly connected to the cross beam 272, the rotating rod 275 is connected to the second The top of the clamping block 274 is rotationally connected, so the rotating rod 275 can drive the second clamping block 274 to move during the rotation, so that the second clamping block 274 comes into contact with the top of the ship shaft system, so that the ship shaft system is fixed on between the clamping rings 279, and then the driving motor 15 drives the mounting plate 3 to rotate, so that the mounting plate 3 drives the support mechanism 2 to rotate, so that the top guide ring 22 and the bottom guide ring 23 rotate inside the slide rail 111, so that The fixing of ship shafting is more convenient.

The technical solution provided by the present invention is to first match and connect the connecting block 24 at the bottom of the top guide ring 22 with the connecting block 24 of the bottom guide ring 23, and then match and connect the fixed blocks 25 on the side of the connecting block 24, and The first fixing bolt 26 passes through the fixing block 25 to connect the top guide ring 22 and the bottom guide ring 23, so that the top guide ring 22 and the bottom guide ring 23 engage the support plate 21, and then the side plate 271 is The positioning block 2710 is matched with the positioning plate and fixed by the second fixing bolt 2711. The support assembly 27 is installed, and then the top guide ring 22, the bottom guide ring 23 and the guide ring between the ring 110 are matched. connection, so that the top guide ring 22 and the bottom guide ring 23 can rotate between the slide rails 111, and then the rotating motor 12 drives the threaded rod 18 to rotate. Since the threaded rod 18 is threadedly connected to the moving block 19, and the threaded rod 18 One end is rotatably connected to the inside of the chute 17, so the threaded rod 18 can drive the moving block 19 to move laterally during the rotation. And since the thread directions at both ends of the threaded rod 18 are opposite, the moving block 19 can move during the rotation of the threaded rod 18. will be close to each other, so the first installation pipe 13 and the second installation pipe 14 on the top of the moving block 19 can be brought close to each other, so that the device can adapt to the fixing work of ship shafting of different lengths, and then the ship shafting is passed through the clamping The ring 279 makes the side of the ship shaft system come into contact with the first clamping block 273 and the second clamping block 274, and squeezes the first clamping block 273 and the second clamping block 274, so that the first clamping block 273 squeezes the spring 278 to make the guide rod 277 slide inside the side plate 271, and then rotates the rotating block 276 so that the rotating block 276 drives the rotating rod 275 to rotate. Since the rotating rod 275 is threadedly connected to the cross beam 272, the rotating rod 275 is connected with the cross beam 272. The top of the second clamping block 274 is rotationally connected, so the rotating rod 275 can drive the second clamping block 274 to move during the rotation, so that the second clamping block 274 comes into contact with the top of the ship's shafting system, so that the ship's shafting system is moved. It is fixed between the clamping rings 279, and then the driving motor 15 drives the mounting plate 3 to rotate, so that the mounting plate 3 drives the support mechanism 2 to rotate, so that the top guide ring 22 and the bottom guide ring 23 rotate inside the slide rail 111 , and then use the set torsional vibration sensing components, encoders, signal collectors, signal collection computers, first transverse sensors, second transverse vibration sensors, and longitudinal vibration sensors to detect the shaft system components to be measured.

The present invention covers any alternatives, modifications, equivalent methods and solutions within the spirit and scope of the invention. In order to provide the public with a thorough understanding of the present invention, specific details are described in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, well-known methods, processes, flows, components, circuits, etc. have not been described in detail in order to avoid unnecessary confusion.

Those of ordinary skill in the art can understand that all or part of the steps in implementing the methods of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium, such as: ROM/RAM, magnetic Discs, compact discs, etc.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be made. regarded as the protection scope of the present invention.

Claims (10)

1. A marine shafting vibration testing arrangement, characterized in that includes: the mounting mechanism (1), the inside of mounting mechanism (1) is provided with two supporting mechanism (2), two supporting mechanism (2) are first supporting mechanism (2) and second supporting mechanism (2) respectively, the side of first supporting mechanism (2) is provided with mounting panel (3).

2. The ship shafting vibration testing device according to claim 1, characterized in that the mounting mechanism (1) comprises a mounting base plate (11), a sliding groove (17) is formed in the upper surface of the mounting base plate (11), a threaded rod (18) is arranged in the sliding groove (17), one end of the threaded rod (18) penetrates through the sliding groove (17) and the mounting base plate (11) and extends to the outside of the mounting base plate (11), a rotating motor (12) is arranged at one end of the threaded rod (18) located at the outside of the mounting base plate (11), one end of the threaded rod (18) away from the rotating motor (12) is connected with the sliding groove (17) in a rotating mode, threads are arranged on the surface of the threaded rod (18), and the threads at two ends of the threaded rod (18) are opposite in directions.

3. The ship shafting vibration testing device according to claim 2, characterized in that two moving blocks (19) are sleeved on the surface threads of the threaded rod (18), a first mounting tube (13) and a second mounting tube (14) are respectively arranged at the tops of the two moving blocks (19), a plurality of circular rings (110) are respectively arranged inside the first mounting tube (13) and the second mounting tube (14), sliding rails (111) are arranged between the circular rings (110), and gears are arranged inside the sliding rails (111).

4. A ship shafting vibration testing device according to claim 3, characterized in that the first mounting tube (13) is internally provided with a support rod (16), a driving motor (15) is arranged between the support rods (16), the second mounting tube (14) is internally provided with a side plate (112), one side of the side plate (112) close to the first mounting tube (13) is provided with a rotating plate (113), the rotating plate (113) is rotationally connected with the side plate (112), and the first mounting tube (13) and the second mounting tube (14) are respectively fixedly connected with two moving blocks (19).

5. The ship shafting vibration testing device according to claim 1, characterized in that the supporting mechanism (2) comprises a supporting plate (21), the supporting plate (21) is provided with two, the supporting plate (21) is located inside the first installation tube (13), the top of the supporting plate (21) is provided with a top guide ring (22), the bottom of the supporting plate (21) is provided with a bottom guide ring (23), one side of the top guide ring (22) and one side of the bottom guide ring (23) close to the installation plate (3) are both provided with connecting blocks (24), the connecting blocks (24) of the top guide ring (22) and the bottom guide ring (23) are mutually matched, a first fixing bolt (26) is arranged inside the fixing blocks (25) on the side of the connecting blocks (24) of the top guide ring (22), the first fixing bolt (26) penetrates through the fixing blocks (25) on the side of the connecting blocks (24) of the top guide ring (22) and the fixing blocks (25) on the side of the connecting blocks (24) of the bottom guide ring (23), and the first fixing bolt (26) and the fixing blocks (25) on the side of the connecting blocks (24) of the bottom guide ring (24) are connected in screw threads.

6. The ship shafting vibration testing device according to claim 5, wherein two support assemblies (27) are arranged between the support plates (21), and the two support assemblies (27) are symmetrically arranged along the vertical central axis of the support plates (21) along the symmetry axis.

7. The ship shafting vibration testing device according to claim 6, wherein the supporting assembly (27) comprises two side plates (271), two positioning plates are arranged between the two side plates (271) and the two supporting plates (21), the positioning plates are fixedly connected with the supporting plates (21), fixing blocks (25) are arranged on two sides of the side plates (271), second fixing bolts (2711) are arranged inside the fixing blocks (25), the second fixing bolts (2711) penetrate through the positioning blocks (2710), the positioning plates and the supporting plates (21), and the second fixing bolts (2711) are in threaded connection with the supporting plates (21).

8. The ship shafting vibration testing device according to claim 7, characterized in that a cross beam (272) is arranged between the side plates (271), a clamping ring (279) is arranged below the cross beam (272), a first clamping block (273) and a second clamping block (274) are arranged on the inner side of the clamping ring (279), a guide rod (277) is arranged on one side, close to the clamping ring (279), of the first clamping block (273), the guide rod (277) penetrates through the clamping ring (279) and extends into the supporting plate (21), the guide rod (277) is in sliding connection with the clamping ring (279) and the supporting plate (21), and a spring (278) is sleeved on the surface of the guide rod (277) between the first clamping block (273) and the clamping ring (279).

9. The ship shafting vibration testing device according to claim 8, characterized in that a rotating rod (275) is arranged at the top of the second clamping block (274), the top end of the rotating rod (275) penetrates through the clamping ring (279), a rotating block (276) is arranged at the top end of the rotating rod (275), another spring (278) is sleeved on the surface of the rotating rod (275) between the second clamping block (274) and the clamping ring (279), the rotating rod (275) is in threaded connection with the clamping ring (279), the rotating rod (275) is in rotating connection with the top of the clamping ring (279), and shafting components to be tested are arranged on the inner side of the clamping ring (279).

10. The ship shafting vibration testing device according to claim 9, characterized in that a first transverse sensor is arranged at the center of the cross beam (272), a second transverse vibration sensor and a longitudinal vibration sensor are arranged at the top of the supporting plate (21), a torsional vibration sensor piece for sensing and transmitting torsional vibration of the shafting component to be tested is arranged on the shaft surface of the shafting component to be tested, the torsional vibration sensor piece comprises an encoder, the output end of the encoder is connected with a signal acquisition instrument, the signal acquisition instrument is connected with a signal acquisition computer, probes of the torsional vibration sensor piece and the first transverse sensor are aligned with the top center of the gear, probes of the second transverse vibration sensor are aligned with the side centers of the gear, and probes of the longitudinal vibration sensor are aligned with the two side ends of the gear respectively.