Device for monitoring centering deviation of ship power device

Abstract

The invention discloses a device for monitoring centering deviation of a ship power device, and belongs to the field of centering deviation monitoring equipment. Comprising a workbench and a vertical fixing frame fixedly installed on the workbench, a transverse fixing rod is transversely and fixedly connected to the surface of the vertical fixing frame, the periphery of the transverse fixing rod is slidably sleeved with a sliding sleeve block, a mounting box is fixedly installed on the front face of the sliding sleeve block, and a laser range finder is fixedly installed in the mounting box; the workbench is connected with a pushing structure and a clamping and fixing component. An alignment assembly is installed on the side edge of the laser range finder. According to the invention, by arranging the alignment assembly, the periphery of the end part of the output shaft of the to-be-measured power device can be always aligned by the laser range finder, so that the inaccuracy caused by manual adjustment is avoided; and during the period, the rotating disc is matched, so that the output shaft of the to-be-detected power device does not generate friction with the Z-shaped plate, on one hand, inaccurate monitoring results caused by heat generated by friction are avoided, and on the other hand, loss caused by friction is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of centering deviation monitoring equipment, and in particular to a device for monitoring centering deviation of a ship power plant. Background Art

[0002] In the field of shipbuilding and maintenance, the alignment accuracy of power plants is one of the key factors to ensure the stable operation of ships and extend the service life of power plants. Traditional methods for monitoring alignment deviations of ship power plants rely on manual measurement and adjustment, which is not only time-consuming and labor-intensive, but also easily affected by human factors, making it difficult to ensure the accuracy and reliability of the measurement results.

[0003] Specifically, the traditional method usually requires technicians to manually adjust the position of the laser rangefinder to align with the output shaft end of the power unit to be measured. This process is not only cumbersome, but also difficult to avoid human errors, such as inaccurate alignment and slight shaking during the measurement process, which may affect the final centering deviation assessment. In addition, since the output shaft of the ship power unit is often in a complex and compact mechanical structure, it is easy to generate friction with surrounding components during direct measurement, which may not only interfere with the measurement results due to frictional heat generation, but also accelerate component wear and affect the overall performance of the power unit. .

[0004] Furthermore, traditional monitoring devices often lack flexibility and adaptability when fixing the power device to be tested, and it is difficult to cope with output shafts of different heights or sizes, which limits the versatility and practicality of the monitoring device. At the same time, during long-term operation monitoring, the power device to be tested may produce slight displacement due to vibration or load changes. If this displacement is not effectively controlled in a timely manner, it will directly affect the accuracy of the monitoring results.

[0005] In addition, existing monitoring devices usually lack precise stopping mechanisms when controlling the measurement process, which may cause the power plant or measurement components to be damaged due to excessive movement after reaching the predetermined position, or affect the measurement accuracy due to position deviation. This monitoring process lacks instant feedback and precise control, which undoubtedly increases the uncertainty of the monitoring results. For this reason, we provide a device for monitoring the centering deviation of ship power plants. Summary of the invention

[0006] The purpose of the present invention is to solve the problems raised in the above background technology and to propose a device for monitoring the centering deviation of a ship power plant.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A device for monitoring centering deviation of a ship power plant comprises a workbench and a vertical fixing frame fixedly mounted on the workbench, wherein a horizontal fixing rod is fixedly connected to the surface of the vertical fixing frame in a transverse direction, a sliding sleeve block is slidably sleeved on the periphery of the horizontal fixing rod, a mounting box is fixedly mounted on the front of the sliding sleeve block, a laser rangefinder is fixedly mounted in the mounting box, a pushing structure and a clamping component are respectively connected to the workbench; an alignment assembly is mounted on the side of the laser rangefinder;

[0009] The pushing structure includes a rectangular groove formed on the upper surface of the workbench, a guide slide groove is formed transversely on the inner side wall of the rectangular groove, a guide slide block is slidably connected to the inner wall of the guide slide groove, a moving plate is fixedly connected between two guide slide blocks, a hydraulic cylinder is fixedly installed on the workbench, and the output end of the hydraulic cylinder is fixedly connected to one end surface of the moving plate, a power device to be tested is placed on the upper surface of the moving plate, and a limit strip is fixedly welded on the upper surface of the moving plate to limit the return movement of the power device to be tested;

[0010] The clamping component comprises a fixing plate fixedly mounted on the upper surface of the workbench, the surface of the fixing plate is fixedly connected with a guide slide rod, the surface of the fixing plate is rotatably connected with a threaded rod through a bearing, the outer periphery of the guide slide rod is slidably sleeved with a mounting plate, the surface of the mounting plate is fixedly mounted with a threaded barrel, and the threaded barrel is threadedly sleeved on the outer periphery of the threaded rod, and the surface of the mounting plate is fixedly mounted with a rubber roller for rolling and clamping the power device to be tested and limiting its upward movement;

[0011] The alignment assembly comprises a Z-shaped plate fixedly connected to the side of the laser rangefinder, a rectangular through groove 1 is opened on the surface of the Z-shaped plate, a movable plate is slidably connected to the inner wall of the rectangular through groove 1, the movable plate is rotatably connected to a shaft rotating rod through a bearing, and a rotating disk is fixedly connected to the end of the shaft rotating rod for synchronously rotating with the output shaft of the power device to be measured;

[0012] A power transmission mechanism is connected between the workbench, the Z-shaped plate and the threaded rod.

[0013] Preferably, the power transmission mechanism comprises a connecting rod fixedly mounted on the lower end of the Z-shaped plate and a bearing seat fixedly mounted on the lower end surface of the workbench, the inner bottom wall of the rectangular groove is transversely provided with a rectangular through-slot 2 for the connecting rod to pass through, a toothed plate is fixedly mounted on the lower end of the connecting rod, the workbench is rotatably connected to a rotating rod through the bearing seat, a gear plate is fixedly connected to the periphery of the rotating rod, a belt pulley 1 is fixedly connected to the end of the rotating rod, a belt pulley 2 is fixedly connected to one end of the threaded rod, a linkage belt is wound around the periphery of the belt pulley 1 and the belt pulley 2, and a strip through-slot 2 is provided on the surface of the workbench for the linkage belt to pass through;

[0014] A reset component is connected between the workbench and the lap plate;

[0015] A timely stopping structure is connected between the workbench, the hydraulic cylinder and the lap plate.

[0016] Preferably, the reset assembly includes a connecting block fixedly connected to the lower end surface of the workbench, a lap rod fixedly connected between the two connecting blocks, and the lap rod is inserted into the lap plate, and a spring is provided on the outer periphery of the lap rod for pulling back the lap plate and restoring it to its initial position.

[0017] Preferably, the timely stop structure includes a fixed block fixedly mounted on the lower end surface of the workbench, a stop button fixedly mounted on the fixed block, a touch-pressure rod fixedly connected to the surface of the lap plate relative to the fixed block, for touching the stop button to achieve rapid stopping of the hydraulic cylinder, a clamping block fixedly mounted on the lower end of the workbench, a wire one fixedly mounted on the workbench through the clamping block, one end of the wire one is electrically connected to the stop button, and the other end is electrically connected to the hydraulic cylinder.

[0018] Preferably, a strip through slot 1 is vertically opened on the inner side wall of the rectangular through slot 1, the side of the movable plate is threadedly connected with a fixing screw, and the threaded section of the fixing screw passes through the strip through slot 1, and the nut section contacts the side of the Z-shaped plate and forms a strong friction force.

[0019] Preferably, the outer sleeve of the transverse fixing rod is provided with a second spring, and one end of the second spring is fixedly connected to the surface of the vertical fixing frame, and the other end is fixedly connected to the surface of the sliding sleeve block relative to the vertical fixing frame, for pushing the sliding sleeve block and resetting the laser rangefinder to the initial position.

[0020] Preferably, a battery is fixedly mounted on the back of the installation box, and a second wire is electrically connected between the battery and the laser rangefinder to provide power to the laser rangefinder.

[0021] Preferably, the gear plate is meshingly connected with the latch plate, so that the gear plate drives the rotating rod to rotate during the movement of the latch plate.

[0022] Preferably, one end of the spring 1 is fixedly connected to the surface of one of the connecting blocks, and the other end of the spring 1 is fixedly connected to the surface of the lap plate.

[0023] Compared with the prior art, the present invention provides a device for monitoring centering deviation of a ship power plant, which has the following beneficial effects:

[0024] 1. The device for monitoring the centering deviation of a ship power plant is provided with an alignment component so that the outer periphery of the end of the output shaft of the power plant to be tested can always be aligned by a laser rangefinder, thereby avoiding the inaccuracy caused by human adjustment; during the process, a rotating disk is used to prevent the output shaft of the power plant to be tested from rubbing against the Z-type plate, thereby avoiding inaccurate monitoring results caused by frictional heat and avoiding losses caused by friction; finally, a strip through slot and a tightening screw are used to allow the output shaft of the power plant to be tested to be adjusted for use when the heights are different.

[0025] 2. The device for monitoring the centering deviation of the ship power unit is provided with a clamping component and a power transmission mechanism, so that the Z-type plate can cooperate with the upper tooth plate and the gear plate to rotate the rotating rod during the pushing process, thereby realizing that the belt pulley 2 drives the threaded rod to rotate, and the rubber roller moves and rolls the power unit to be tested, thereby avoiding the upward movement of the power unit to be tested during the later operation monitoring, and further improving the accuracy of the monitoring results.

[0026] 3. The device for monitoring the centering deviation of the ship power unit is equipped with a timely stop structure, so that the thrust of the hydraulic cylinder can be stopped in time after the Z-type plate moves to the specified position, thereby avoiding the excessive movement and deformation of the Z-type plate caused by the failure of the hydraulic cylinder to stop in time or the damage to the output shaft of the power unit to be tested, which may cause inaccurate monitoring results, and once again enhances the accuracy of monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A first stereoscopic view of a device for monitoring centering deviation of a ship power plant proposed by the present invention;

[0028] Figure 2 A second stereoscopic view of a device for monitoring centering deviation of a ship power plant proposed by the present invention;

[0029] Figure 3 This is a schematic structural diagram of a device for monitoring centering deviation of a ship power plant proposed by the present invention after the power plant to be tested is disassembled;

[0030] Figure 4 This is a structural schematic diagram of an alignment component in a device for monitoring centering deviation of a ship power plant proposed by the present invention;

[0031] Figure 5 This is a schematic structural diagram of a clamping component in a device for monitoring centering deviation of a ship power plant proposed by the present invention;

[0032] Figure 6 A device for monitoring centering deviation of a ship power plant proposed by the present invention Figure 2 A magnified view of the structure at center A;

[0033] Figure 7 A device for monitoring centering deviation of a ship power plant proposed by the present invention Figure 3 A magnified view of the structure at point B.

[0034] In the figure: 1, workbench; 2, vertical frame; 3, horizontal rod; 4, sliding sleeve; 5, installation box; 6, laser rangefinder; 7, rectangular groove; 8, guide slide groove; 9, guide slide block; 10, moving plate; 11, hydraulic cylinder; 12, limit bar; 13, power device to be tested; 14, Z-type plate; 15, rectangular through groove 1; 16, movable plate; 17, shaft rotating rod; 18, rotating disk; 19, strip through groove 1; 20, tightening screw; 21, fixing plate; 22, guide slide rod; 23, threaded rod; 24, installation plate; 2 5. Threaded barrel; 26. Rubber roller; 27. Rectangular through slot 2; 28. Connecting rod; 29. ​​Tooth plate; 30. Bearing seat; 31. Rotating rod; 32. Gear plate; 33. Strip through slot 2; 34. Belt pulley 1; 35. Belt pulley 2; 36. Linking belt; 37. Overlap plate; 38. Fixed block; 39. Stop button; 40. Touch-pressure rod; 41. Fixing block; 42. Wire 1; 43. Connecting block; 44. Overlap rod; 45. Spring 1; 46. Spring 2; 47. Battery; 48. Wire 2. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Reference Figure 1-Figure 7A device for monitoring the centering deviation of a ship power plant, the main body of the device is composed of a workbench 1 and a vertical frame 2, the vertical frame 2 is fixedly installed on the workbench 1, and the transverse fixing rod 3 is transversely fixedly connected to the surface of the vertical frame 2. The sliding sleeve 4 is slidably sleeved on the periphery of the transverse fixing rod 3, the installation box 5 is fixedly installed on the front of the sliding sleeve 4, and the laser rangefinder 6 is fixedly installed in the installation box 5. On the workbench 1, a push structure and a clamping component are arranged. The push structure includes a rectangular groove 7 opened on the upper end surface of the workbench 1, a guide slide groove 8 is transversely opened on the inner side wall of the rectangular groove 7, a guide slide block 9 is slidably connected to the inner wall of the guide slide groove 8, and the two guide slide blocks 9 are fixedly connected by a moving plate 10. The hydraulic cylinder 11 is fixedly installed on the workbench 1, and its output end is fixedly connected to one end surface of the moving plate 10. The power device 13 to be tested is placed on the upper end surface of the moving plate 10, and the limit bar 12 is fixedly welded on the upper end surface of the moving plate 10 to limit the return movement of the power device 13 to be tested. The clamping part includes a fixed plate 21 fixedly mounted on the upper surface of the workbench 1, a guide slide rod 22 fixedly connected to the surface of the fixed plate 21, and a threaded rod 23 rotatably connected to the surface of the fixed plate 21 through a bearing. The mounting plate 24 is slidably sleeved on the periphery of the guide slide rod 22, and the threaded cylinder 25 is fixedly mounted on the surface of the mounting plate 24 and threadedly sleeved on the periphery of the threaded rod 23. The rubber roller 26 is fixedly mounted on the surface of the mounting plate 24, and is used to roll and clamp the power device 13 to be tested and limit its upward movement. The side of the laser rangefinder 6 is installed with an alignment assembly, and the alignment assembly includes a Z-shaped plate 14 fixedly connected to the side of the laser rangefinder 6, a rectangular through groove 15 is opened on the surface of the Z-shaped plate 14, and a movable plate 16 is slidably connected to the inner wall of the rectangular through groove 15. The shaft rotating rod 17 is rotatably connected to the movable plate 16 through a bearing, and the rotating disk 18 is fixedly connected to the end of the shaft rotating rod 17, and is used to follow the synchronous rotation of the output shaft of the power device 13 to be tested. In addition, a power transmission mechanism is connected between the workbench 1, the Z-shaped plate 14 and the threaded rod 23, so as to realize the function of driving the threaded rod 23 to rotate when the Z-shaped plate 14 moves.

[0038] Reference Figure 1-Figure 7 The power transmission mechanism includes a connecting rod 28 fixedly mounted on the lower end of the Z-shaped plate 14 and a bearing seat 30 fixedly mounted on the lower end surface of the workbench 1. A rectangular through slot 27 is transversely opened on the inner bottom wall of the rectangular groove 7 for the connecting rod 28 to pass through. A latch plate 29 is fixedly installed on the lower end of the connecting rod 28, and a rotating rod 31 is rotatably connected to the workbench 1 through a bearing and fixedly connected to its periphery through a gear plate 32. A belt pulley 1 34 is fixedly connected to the end of the rotating rod 31, and a belt pulley 2 35 is fixedly connected to one end of the threaded rod 23. A linkage belt 36 is wound around the peripheries of the belt pulley 1 34 and the belt pulley 2 35, and a strip through slot 2 33 is opened on the surface of the workbench 1 for the linkage belt 36 to pass through. .

[0039] In the present invention, a reset assembly is also connected between the workbench 1 and the lap plate 37, which is used to pull back the lap plate 37 and reset it to its initial position. A timely stop structure is also connected between the workbench 1, the hydraulic cylinder 11 and the lap plate 37, which is used to stop the thrust of the hydraulic cylinder 11 in time after the Z-type plate 14 moves to the specified position; and the designed outer diameter of 28 is adapted to the opening width of 27, so as to prevent the rotation of 14 and 6, ensuring that 6 can only move horizontally, and achieving better alignment accuracy; through the cooperation of the power transmission mechanism, the reset assembly and the timely stop structure, the present invention realizes the rotation of the threaded rod 23 when the Z-type plate 14 moves, thereby realizing the rolling clamping function of the rubber roller 26 on the power device 13 to be tested, and at the same time ensures that the hydraulic cylinder 11 stops the thrust in time after the Z-type plate 14 moves to the specified position, avoiding deformation or damage caused by excessive movement.

[0040] Reference Figure 1-Figure 7 The reset assembly includes a connection block 43 fixedly connected to the lower end surface of the workbench 1, and the two connection blocks 43 are fixedly connected by a lap rod 44, and the lap rod 44 is inserted on the lap plate 37. A spring 45 is sleeved on the periphery of the lap rod 44 to pull back the lap plate 37 and reset it to its initial position.

[0041] In the present invention, by providing the reset assembly, the function of the lap plate 37 being able to automatically reset to the initial position after being acted upon by an external force is achieved, thereby ensuring the stability and reliability of the device.

[0042] Reference Figure 1-Figure 7 The timely stop structure includes a fixed block 38 fixedly mounted on the lower end surface of the workbench 1, and a stop button 39 fixedly mounted on the fixed block 38. A contact rod 40 is fixedly connected to the surface of the lap plate 37 relative to the fixed block 38, which is used to contact the stop button 39 to achieve a quick stop of the hydraulic cylinder 11. A clamping block 41 is fixedly mounted on the lower end of the workbench 1, and a wire 42 is fixedly mounted on the workbench 1 through the clamping block 41, one end of which is electrically connected to the stop button 39, and the other end is electrically connected to the hydraulic cylinder 11.

[0043] In the present invention, by setting a timely stop structure, the function of stopping the thrust of the hydraulic cylinder 11 in time after the Z-type plate 14 moves to the specified position is achieved, thereby avoiding deformation or damage caused by excessive movement and further improving the accuracy of the monitoring results.

[0044] Reference Figure 1-Figure 7 A strip through slot 19 is vertically opened on the inner side wall of the rectangular through slot 15, and a fixing screw 20 is threadedly connected to the side of the movable plate 16, and the threaded section of the fixing screw 20 passes through the strip through slot 19, and the nut section contacts the side of the Z-shaped plate 14 and forms a strong friction force.

[0045] In the present invention, through the cooperation of the strip through slot 19 and the tightening screw 20, the adaptability function when the output shaft of the power device 13 to be measured is different in height is realized, ensuring that the laser rangefinder 6 can always align with the output shaft of the power device 13 to be measured for monitoring.

[0046] Reference Figure 1-Figure 7 A spring 2 46 is provided on the outer periphery of the transverse fixing rod 3 , and one end of the spring 2 46 is fixedly connected to the surface of the vertical fixing frame 2 , and the other end is fixedly connected to the surface of the sliding sleeve block 4 relative to the vertical fixing frame 2 .

[0047] In the present invention, by setting the spring 2 46, the present invention realizes the function of automatically resetting to the initial position after the laser rangefinder 6 completes the monitoring, thereby improving the automation degree and use efficiency of the device.

[0048] Reference Figure 1-Figure 7 A battery 47 is fixedly installed on the back of the installation box 5, and the battery 47 and the laser rangefinder 6 are electrically connected through a wire 48; the gear plate 32 is meshed and connected with the tooth plate 29, so that the gear plate 32 drives the rotating rod 31 to rotate during the movement of the tooth plate 29; one end of the spring 45 is fixedly connected to the surface of a connecting block 43, and the other end is fixedly connected to the surface of the overlapping plate 37.

[0049] In the present invention, the function of providing a stable power supply for the laser rangefinder 6 is realized through the cooperation of the battery 47 and the wire 2 48, thereby ensuring the continuity and accuracy of the monitoring process; the function of driving the threaded rod 23 to rotate when the Z-type plate 14 moves is realized through the meshing connection between the gear plate 32 and the tooth plate 29, thereby providing a power source for the rubber roller 26 to roll the power device 13 to be measured; and the function of automatically resetting the lap plate 37 to the initial position after being acted upon by an external force is realized through the connection method of the spring 1 45, thereby ensuring the stability and reliability of the device.

[0050] The working principle of the present invention is as follows: the power device 13 to be tested is placed on the movable plate 10 to ensure that it is in contact with the limit bar 12 and is restricted; according to the height of the output shaft of the power device 13 to be tested, the position of the movable plate 16 in the rectangular through groove 15 is adjusted and fixed by tightening the screws 20. Ensure that the rotating disk 18 is coaxial with the output shaft of the power device 13 to be tested and can rotate synchronously therewith; start the hydraulic cylinder 11, and its output end pushes the moving plate 10 to slide along the rectangular groove 7 and the guide groove 8 until the power device 13 to be tested reaches the monitoring position; during the sliding process of the moving plate 10, the Z-plate 14 moves down accordingly, and the connecting rod 28 drives the tooth plate 29 to move; the tooth plate 29 engages with the gear plate 32 to drive the rotating rod 31 to rotate; the rotating rod 31 is driven by the belt pulley 1 34, the linkage belt 36 and the belt pulley 2 35 to rotate the threaded rod 23; when the threaded rod 23 rotates, the mounting plate 24 slides along the guide slide rod 22, and the rubber roller 26 clamps the power device 13 to be tested to prevent it from moving upward; when the Z-plate 14 moves to the specified position, the lap plate 37 The contact rod 40 on the upper part contacts the stop button 39; the stop button 39 sends a stop signal to the hydraulic cylinder 11 through the wire 1 42, and the hydraulic cylinder 11 stops working to prevent the Z-type plate 14 from moving excessively; the laser rangefinder 6 is powered by the battery 47, and emits a laser beam to aim at the output shaft of the power device 13 to be tested; the rotating disk 18 rotates synchronously with the output shaft of the power device 13 to be tested to ensure that the laser beam is always aimed at the output shaft; the laser rangefinder 6 measures the distance between the laser beam and the output shaft, and calculates the centering deviation based on the measurement result; after the monitoring is completed, the power supply of the laser rangefinder 6 is turned off; the spring 1 45 pulls back the overlap plate 37 through the overlap rod 44 to reset it to the initial position; the spring 2 46 pushes the sliding sleeve 4 to slide along the transverse fixing rod 3 to reset the laser rangefinder 6 to the initial position.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for monitoring centering deviation of a ship power plant, comprising a workbench (1) and a vertical fixing frame (2) fixedly mounted on the workbench (1), wherein a transverse fixing rod (3) is transversely fixedly connected to the surface of the vertical fixing frame (2), a sliding sleeve block (4) is slidably sleeved on the periphery of the transverse fixing rod (3), a mounting box (5) is fixedly mounted on the front of the sliding sleeve block (4), and a laser rangefinder (6) is fixedly mounted in the mounting box (5), wherein the laser rangefinder (6) is fixedly mounted in the mounting box (5), characterized in that: The workbench (1) is respectively connected with a pushing structure and a clamping component; an alignment component is installed on the side of the laser rangefinder (6); The push structure comprises a rectangular groove (7) provided on the upper end surface of the workbench (1), a guide groove (8) being provided transversely on the inner side wall of the rectangular groove (7), a guide slide block (9) being slidably connected to the inner wall of the guide slide block (8), a movable plate (10) being fixedly connected between two guide slide blocks (9), a hydraulic cylinder (11) being fixedly mounted on the workbench (1), and an output end of the hydraulic cylinder (11) being fixedly connected to one end surface of the movable plate (10), a power device (13) to be tested being placed on the upper end surface of the movable plate (10), and a limit strip (12) being fixedly welded to the upper end surface of the movable plate (10) for limiting the return movement of the power device (13) to be tested; The clamping component comprises a fixing plate (21) fixedly mounted on the upper end surface of the workbench (1), the surface of the fixing plate (21) being fixedly connected to a guide slide rod (22), the surface of the fixing plate (21) being rotatably connected to a threaded rod (23) via a bearing, the periphery of the guide slide rod (22) being slidably sleeved with a mounting plate (24), the surface of the mounting plate (24) being fixedly mounted with a threaded cylinder (25), and the threaded cylinder (25) being threadedly sleeved on the periphery of the threaded rod (23), and the surface of the mounting plate (24) being fixedly mounted with a rubber roller (26) for rolling and clamping the power device (13) to be tested and limiting its upward movement; The alignment assembly comprises a Z-shaped plate (14) fixedly connected to the side of the laser rangefinder (6), the surface of the Z-shaped plate (14) is provided with a rectangular through groove (15), the inner wall of the rectangular through groove (15) is slidably connected with a movable plate (16), the movable plate (16) is rotatably connected with a shaft rotating rod (17) through a bearing, and the end of the shaft rotating rod (17) is fixedly connected with a rotating disk (18) for following the synchronous rotation of the output shaft of the power device (13) to be measured; A power transmission mechanism is connected between the workbench (1), the Z-shaped plate (14) and the threaded rod (23).

2. A device for monitoring centering deviation of a ship power plant according to claim 1, characterized in that: The power transmission mechanism comprises a connecting rod (28) fixedly mounted on the lower end of the Z-shaped plate (14) and a bearing seat (30) fixedly mounted on the lower end surface of the workbench (1); the inner bottom wall of the rectangular groove (7) is transversely provided with a rectangular through groove (27) for the connecting rod (28) to pass through; a toothed plate (29) is fixedly mounted on the lower end of the connecting rod (28); the workbench (1) is rotatably connected to a rotating rod (31) through the bearing seat (30); a gear plate (32) is fixedly connected to the periphery of the rotating rod (31); a belt pulley (34) is fixedly connected to the end of the rotating rod (31); one end of the threaded rod (23) is fixedly connected to a belt pulley (35); a linkage belt (36) is wound around the peripheries of the belt pulley (34) and the belt pulley (35); and a strip through groove (33) is provided on the surface of the workbench (1) for the linkage belt (36) to pass through. A reset component is connected between the workbench (1) and the lap plate (37); An instant stop structure is connected between the workbench (1), the hydraulic cylinder (11) and the lap plate (37).

3. A device for monitoring centering deviation of a ship power plant according to claim 2, characterized in that: The reset assembly comprises a connecting block (43) fixedly connected to the lower end surface of the workbench (1), a lap rod (44) fixedly connected between the two connecting blocks (43), and the lap rod (44) is inserted on the lap plate (37), and a spring (45) is sleeved on the outer periphery of the lap rod (44) for pulling back the lap plate (37) and restoring it to its initial position.

4. A device for monitoring centering deviation of a ship power plant according to claim 2, characterized in that: The timely stop structure comprises a fixed block (38) fixedly mounted on the lower end surface of the workbench (1), a stop button (39) fixedly mounted on the fixed block (38), a pressure rod (40) fixedly connected to the surface of the lap plate (37) relative to the fixed block (38) for pressing the stop button (39) to achieve rapid stopping of the hydraulic cylinder (11), a clamping block (41) fixedly mounted on the lower end of the workbench (1), a wire (42) fixedly mounted on the workbench (1) via the clamping block (41), one end of the wire (42) being electrically connected to the stop button (39), and the other end being electrically connected to the hydraulic cylinder (11).

5. The device for monitoring centering deviation of a ship power plant according to claim 1, characterized in that: The inner side wall of the rectangular through groove (15) is vertically provided with a strip through groove (19), and the side edge of the movable plate (16) is threadedly connected with a fixing screw (20), and the threaded section of the fixing screw (20) passes through the strip through groove (19), and the nut section contacts the side edge of the Z-shaped plate (14) to form a strong friction force.

6. The device for monitoring centering deviation of a ship power plant according to claim 1, characterized in that: The outer periphery of the transverse fixing rod (3) is provided with a second spring (46), one end of which is fixedly connected to the surface of the vertical fixing frame (2), and the other end of which is fixedly connected to the surface of the sliding sleeve block (4) opposite to the vertical fixing frame (2), so as to push the sliding sleeve block (4) and reset the laser rangefinder (6) to an initial position.

7. The device for monitoring centering deviation of a ship power plant according to claim 1, characterized in that: A storage battery (47) is fixedly mounted on the back of the installation box (5), and a second wire (48) is electrically connected between the storage battery (47) and the laser rangefinder (6) for providing power to the laser rangefinder (6).

8. The device for monitoring centering deviation of a ship power plant according to claim 2, characterized in that: The gear plate (32) is meshedly connected with the latch plate (29) so as to allow the gear plate (32) to drive the rotating rod (31) to rotate during the movement of the latch plate (29).

9. The device for monitoring centering deviation of a ship power plant according to claim 3, characterized in that: One end of the spring one (45) is fixedly connected to the surface of a connecting block (43), and the other end of the spring one (45) is fixedly connected to the surface of the lap plate (37).

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