A dynamic balance detection device for propellers used in ships

Abstract

The present invention relates to the technical field of detection equipment, and in particular to a dynamic balance detection device for a propeller for a ship, comprising a main shaft, a connecting frame, a top plate and a counterweight. The main shaft is vertical and used to fix the propeller. The top plate is coaxially located above the main shaft. The top plate and the main shaft are connected and fixed by the connecting frame, and the counterweight is slidably located on the top plate. The present invention provides a counterweight for the propeller and enables the counterweight to move on the top plate, thereby ultimately enabling the propeller to rotate smoothly. At this time, the position on the propeller corresponding to the counterweight is the unbalance point of the propeller, and the weight of the counterweight is the unbalance amount of the propeller, thereby realizing a fast and accurate dynamic balance test of the propeller.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a dynamic balance detection device for a propeller of a ship. Background Art

[0002] The propulsion system of a ship is one of its core components, and the propeller, as a key component of the propulsion system, has a direct impact on the ship's navigation efficiency, safety and economy. The dynamic balance of the propeller is crucial to ensure its long-term stable operation. An unbalanced propeller will not only increase vibration, but also aggravate the wear of mechanical parts, reduce the fuel efficiency of the ship, and may cause safety hazards.

[0003] At present, a dynamic balance test method for a propeller is to directly install the propeller on a motor and drive the propeller to rotate through the motor. When the propeller is unbalanced, the rotating propeller will generate vibration, thereby realizing the dynamic balance test of the propeller. However, this test method cannot accurately locate the position of the unbalanced point on the propeller, resulting in only a fuzzy test of the propeller. It is necessary to subsequently configure heavy objects on the propeller and adjust the configuration points multiple times so that the propeller can rotate stably. This positioning method is cumbersome and inconvenient to operate. To solve this problem, the present invention provides a dynamic balance detection device for a ship propeller. Summary of the invention

[0004] In view of at least one of the above technical problems, the present invention provides a propeller dynamic balance detection device for a ship, and the specific technical solution adopted is:

[0005] According to a first aspect of the present invention, there is provided a propeller dynamic balance detection device for a ship, comprising a main shaft, a connecting frame, a top plate and a counterweight, wherein the main shaft is vertical and used to fix the propeller, the top plate is coaxially located above the main shaft, the top plate is connected and fixed to the main shaft by the connecting frame, and the counterweight is slidably located on the top plate;

[0006] When the propeller rotates, the top plate and the counterweight block rotate synchronously, and the propeller rotates smoothly by adjusting the position of the counterweight block on the top plate.

[0007] In some embodiments of the present invention, the detection device further comprises a rotating drum, a moving seat is arranged in the rotating drum, a tensile gauge is arranged at the bottom of the moving seat, and a magnet is arranged at the bottom of the tensile gauge;

[0008] Among them, the counterweight block is located on the lower surface of the top plate, the magnet generates an upward magnetic attraction on the counterweight block, the dynamometer detects the size of the magnetic attraction, the rotating drum rotates synchronously with the top plate, and a pushing structure is provided on the rotating drum. The pushing structure is used to adjust the position of the moving seat in the rotating drum, thereby adjusting the position of the counterweight block on the top plate with the help of the magnet.

[0009] In some embodiments of the present invention, a first support ring is provided at the bottom of the rotating drum, the first support ring is located on the outer side of the top plate, a plurality of first rolling balls are rotatably provided on the upper and lower surfaces of the top plate, the first rolling balls are located at the edge of the top plate, a first annular groove is provided on the circumferential inner wall of the first support ring, the first rolling balls are located inside the first annular groove and the first rolling balls are in contact with the inner wall of the first annular groove;

[0010] The circumferential outer wall of the top plate and the inner wall of the first annular groove are connected by a plurality of elastic ropes.

[0011] In some embodiments of the present invention, the pushing structure includes an adjusting ring rotatably mounted on the inner wall of the rotating drum and a transmission wheel transmission-connected to the adjusting ring, a sliding rod and a threaded rod are arranged on the inner wall of the adjusting ring, both the sliding rod and the threaded rod pass through the moving seat, and the sliding rod is slidably connected to the moving seat, the threaded rod is threadedly connected to the moving seat, and a first micro-motor for providing power for the rotation of the threaded rod is arranged on the inner wall of the adjusting ring;

[0012] A second micromotor for providing power to the transmission wheel is arranged on the outer wall of the rotating drum.

[0013] In some embodiments of the present invention, the counterweight block is formed by stacking a plurality of magnetic plates, and the plurality of magnetic plates are fastened together by bolts, and a plurality of second rolling balls are rotatably arranged on a magnetic plate close to the top plate among the plurality of magnetic plates, and the second rolling balls roll on the bottom surface of the top plate.

[0014] In some embodiments of the present invention, the detection device further comprises a bottom plate, a side plate is rolled on the bottom plate, a support ring is sleeved on the outer wall of the rotating drum, the side plate is fixedly connected to the support ring, and the rotating drum rotates on the support ring;

[0015] A detection ring is sleeved on the outer wall of the connecting frame, and the detection ring is coaxial with the main shaft. A distance meter is fixed on the side plate, and the distance meter detects the distance between the side plate and the detection ring.

[0016] In some embodiments of the present invention, a main motor rolls on the bottom plate, a first turntable is provided at the output end of the main motor, a second turntable is provided at the bottom of the main shaft, the first turntable, the second turntable and the main shaft are coaxial, and the first turntable and the second turntable are connected by multiple elastic bands.

[0017] In some embodiments of the present invention, a tray is coaxially fixed on the main shaft, and a plurality of third rolling balls are provided on the upper and lower surfaces of the tray. The third rolling balls are located at the edge of the tray. A second support ring is sleeved on the outer side of the tray, and a second annular groove is opened on the circumferential inner wall of the second support ring. The third rolling balls are located in the second annular groove and in rolling contact with the inner wall of the second annular groove. The second support ring is fixed to the side plate through a support plate.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides a counterweight block for the propeller and enables the counterweight block to move on the top plate, thereby finally enabling the propeller to rotate smoothly. At this time, the position on the propeller corresponding to the counterweight block is the unbalance point of the propeller, and the weight of the counterweight block is the unbalance of the propeller, thereby realizing a fast and accurate dynamic balance test of the propeller; the dynamic balance detection device provided by the present invention is simple in design and easy to operate. The dynamic balance adjustment of the propeller can be achieved through a simple counterweight block. Compared with the traditional method that requires multiple manual adjustments of the counterweight point, the operation of the present invention is more intuitive and convenient; since the counterweight block can move in any direction on the top plate, it can detect the propeller with the unbalance point at any position, thereby realizing the detection of propellers of different specifications; by observing the position change of the counterweight block, the unbalance condition of the propeller can be directly judged, and this method provides an intuitive unbalance indication, making the test results easier to understand and analyze; in summary, the technical solution effectively solves the problems existing in the traditional dynamic balance test method through innovative design ideas and scientific methods, and has high practical value and development prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 yes Figure 1 Schematic diagram of explosion structure;

[0023] Figure 3 yes Figure 2 An enlarged structural diagram of the middle top plate;

[0024] Figure 4 yes Figure 2 A schematic cross-sectional view of the structure of the central rotating cylinder and the second supporting ring;

[0025] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of the middle counterweight. DETAILED DESCRIPTION

[0026] 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.

[0027] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element 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.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0029] like Figures 1 to 5 As shown, a dynamic balance detection device for a propeller for a ship of the present invention comprises a main shaft 2, a connecting frame 3, a top plate 4 and a counterweight 5, wherein the main shaft 2 is vertical and used to fix the propeller 1, the top plate 4 is coaxially located above the main shaft 2, the top plate 4 is connected and fixed to the main shaft 2 through the connecting frame 3, and the counterweight 5 is slidably located on the top plate 4;

[0030] When the propeller 1 rotates, the top plate 4 and the counterweight 5 rotate synchronously, and the propeller 1 rotates smoothly by adjusting the position of the counterweight 5 on the top plate 4.

[0031] In the above embodiment, the main shaft 2, the connecting frame 3 and the top plate 4 can be regarded as a whole. The main shaft 2 is used to fix the propeller 1, and specifically, bolts and other structures can be used to achieve the fixing work. The axes of the main shaft 2 and the top plate 4 are vertical, so that the axis of the propeller 1 can be vertical, thereby avoiding the interference of gravity on the propeller 1 when the propeller 1 rotates. The counterweight 5 is slidably located on the top plate 4, and the counterweight 5 will rotate synchronously with the top plate 4. The connecting frame 3 can be used to connect the main shaft 2 and the top plate 4. Of course, the number of connecting frames 3 can be set to multiple, and the number and position of the connecting frames 3 cannot affect the normal disassembly and assembly of the propeller 1. The main shaft 2 will drive the propeller 1 and the connecting frame 3, the top plate 4 and the counterweight 5 to rotate synchronously. When the center of gravity of the propeller 1 shifts, the propeller 1 Vibration will be generated, and the propeller 1 will drive the main shaft 2, the connecting frame 3, the top plate 4 and the counterweight 5 to vibrate synchronously, and the vibration direction is horizontal, pushing the counterweight 5 to move on the top plate 4. As the position of the counterweight 5 changes, the position of the weight provided by the counterweight 5 to the propeller 1 changes, thereby adjusting the rotation center of gravity of the propeller 1. When the vibration of the propeller 1 is reduced to a stable rotation state, the position corresponding to the counterweight 5 on the propeller 1 is the unbalance point of the propeller 1, and the weight of the counterweight 5 is the unbalance amount. When the counterweight 5 is located at the axial position of the main shaft 2, the dynamic balance of the propeller 1 itself meets the specified requirements, thereby realizing the dynamic balance test of the propeller 1. This test method can simultaneously test the unbalance point and unbalance amount on the propeller 1.

[0032] Based on the above embodiment, since the propeller 1, the main shaft 2 and the top plate 4 are coaxial, the counterweight 5 can be regarded as an auxiliary counterweight provided for the propeller 1, and it should be pointed out that when the counterweight 5 provides downward pressure for the top plate 4, a counterweight can be added to the position on the propeller 1 corresponding to the counterweight 5. When the counterweight 5 provides an upward thrust for the top plate 4, a hole can be drilled at the position of the propeller 1 corresponding to the counterweight 5. Of course, holes can also be drilled or counterweights can be added at the symmetrical position of the axis of the propeller 1 corresponding to the unbalanced point.

[0033] The present invention provides a counterweight 5 for the propeller 1 and enables the counterweight 5 to move on the top plate 4, so that the propeller 1 can finally rotate smoothly. At this time, the position on the propeller 1 corresponding to the counterweight 5 is the unbalance point of the propeller 1, and the weight of the counterweight 5 is the imbalance of the propeller 1, thereby realizing a fast and accurate dynamic balance test of the propeller 1; the dynamic balance detection device provided by the present invention is simple in design and easy to operate. The dynamic balance adjustment of the propeller 1 can be achieved through a simple counterweight 5. Compared with the traditional method which requires multiple manual adjustments of the counterweight point, the operation of the present invention is simple. More intuitive and convenient; since the counterweight 5 can move in any direction on the top plate 4, it can detect the propeller 1 with the imbalance point at any position, thereby realizing the detection of propellers 1 of different specifications; by observing the position change of the counterweight 5, the imbalance condition of the propeller 1 can be directly judged, and this method provides an intuitive imbalance indication, making the test results easier to understand and analyze; in summary, this technical solution effectively solves the problems existing in the traditional dynamic balancing test method through innovative design ideas and scientific methods, and has high practical value and development prospects.

[0034] In some embodiments of the present invention, Figure 4 As shown, the detection device further comprises a rotating drum 6, a moving seat 7 is arranged inside the rotating drum 6, a dynamometer 8 is arranged at the bottom of the moving seat 7, and a magnet 9 is arranged at the bottom of the dynamometer 8;

[0035] Among them, the counterweight block 5 is located on the lower surface of the top plate 4, the magnet 9 generates an upward magnetic attraction on the counterweight block 5, the dynamometer 8 detects the attraction of the magnet 9, the rotating drum 6 rotates synchronously with the top plate 4, and a pushing structure is provided on the rotating drum 6. The pushing structure is used to adjust the position of the moving seat 7 in the rotating drum 6, thereby adjusting the position of the counterweight block 5 on the top plate 4 with the help of the magnet 9.

[0036] In the above embodiment, the rotating drum 6 is coaxial with the top plate 4 and the main shaft 2, and the position of the rotating drum 6 is fixed. The rotating drum 6 can only perform rotational motion, and the rotating drum 6 rotates synchronously with the top plate 4. The rotating drum 6 is connected to the counterweight 5 by magnetic attraction because the magnet 9 and the counterweight 5 are connected by magnetic attraction. Therefore, when the position of the movable seat 7 in the rotating drum 6 changes, the position of the counterweight 5 on the top plate 4 changes, thereby realizing the adjustment of the position of the counterweight 5. The pushing structure on the rotating drum 6 is used to provide power for the movement of the movable seat 7.

[0037] In actual use, if the propeller 1 is unbalanced, when the propeller 1 rotates, the top plate 4 will vibrate accordingly, and at this time the rotating drum 6 can only maintain a state of synchronous rotation with the top plate 4 and cannot vibrate, so that the rotating drum 6 can provide stable support for the propulsion structure and the moving seat 7, dynamometer 8 and magnet 9 thereon.

[0038] It should be pointed out that since magnetic force is used to connect the counterweight 5, the main shaft 2, the connecting frame 3 and the top plate 4 need to be made of non-magnetic materials. Since the magnet 9 is far away from the propeller 1, the effect of the magnetic force on the propeller 1 is small and can be ignored. Even if the distance between the magnet 9 and the propeller 1 is short, the unbalanced amount on the propeller 1 can be detected by the tension of the magnet 9 detected by the dynamometer 8.

[0039] In some embodiments of the present invention, Figure 3 to Figure 4 As shown, a first support ring 10 is provided at the bottom of the rotating drum 6, and the first support ring 10 is located on the outer side of the top plate 4. A plurality of first rolling balls 11 are rotatably provided on the upper and lower surfaces of the top plate 4, and the first rolling balls 11 are located at the edge of the top plate 4. A first annular groove is provided on the inner circumferential wall of the first support ring 10, and the first rolling balls 11 are located inside the first annular groove and the first rolling balls 11 are in contact with the inner wall of the first annular groove.

[0040] The circumferential outer wall of the top plate 4 and the inner wall of the first annular groove are connected via a plurality of elastic ropes 12 .

[0041] In the above embodiment, the first support ring 10 and the first rolling ball 11 are arranged so that the first support ring 10 can lift and support the top plate 4, so that the position of the top plate 4 is fixed and the top plate 4 is allowed to move only in the horizontal direction. The first support ring 10 uses the first rolling ball 11 and the top plate 4 to support the propeller 1, the main shaft 2 and the connecting frame 3. Since the first support ring 10 and the top plate 4 are connected by a plurality of elastic ropes 12, the elastic ropes 12 can position the top plate 4 in the natural state, that is, the top plate 4 is connected to the first support ring 10, The rotating drum 6 is coaxial. When the propeller 1 rotates, the top plate 4 will use multiple elastic ropes 12 to drive the first support ring 10 to rotate, and the first support ring 10 will drive the rotating drum 6 to rotate. When the propeller 1 is unbalanced and causes vibration, the top plate 4 will slide in the first annular groove on the first support ring 10, and the first ball 11 will roll in the first annular groove, that is, the top plate 4 vibrates on the rotating drum 6, and the elastic rope 12 is elastically deformed. When the rotating drum 6 rotates smoothly, the rotating drum 6 rotates at the same speed as the top plate 4, and the vibration of the propeller 1 and the top plate 4 will still cause elastic deformation of the elastic rope 12.

[0042] Based on the above embodiment, since the top plate 4 and the first support ring 10 are connected by the elastic rope 12, when the top plate 4 initially rotates, the top plate 4 will pull the elastic rope 12 to deform, and then use the elasticity of the elastic rope 12 to pull the rotating drum 6 to rotate. At this time, the rotating drum 6 and the top plate 4 rotate differentially. Only when the top plate 4 and the rotating drum 6 rotate at the same speed and uniform speed can the detection work be started.

[0043] In some embodiments of the present invention, Figure 2 and Figure 4 As shown, the pushing structure includes an adjusting ring 13 rotatably mounted on the inner wall of the rotating drum 6 and a transmission wheel 14 transmission-connected to the adjusting ring 13, a sliding rod 15 and a threaded rod 16 are arranged on the inner wall of the adjusting ring 13, the sliding rod 15 and the threaded rod 16 both pass through the moving seat 7, and the sliding rod 15 is slidably connected to the moving seat 7, the threaded rod 16 is threadedly connected to the moving seat 7, and a first micro motor 17 for providing power for the rotation of the threaded rod 16 is arranged on the inner wall of the adjusting ring 13;

[0044] A second micromotor 18 for providing power to the transmission wheel 14 is disposed on the outer wall of the rotating drum 6 .

[0045] In the above embodiment, the second micromotor 18 can drive the adjustment ring 13 to rotate through the transmission wheel 14, thereby adjusting the direction of the slide rod 15 and the threaded rod 16. The first micromotor 17 can drive the threaded rod 16 to rotate, thereby pushing the moving seat 7 to move. The moving seat 7 slides on the slide rod 15, and the moving seat 7 will drive the dynamometer 8 and the magnet 9 to move, thereby realizing the adjustment of the position of the counterweight 5.

[0046] In some embodiments of the present invention, Figure 5 As shown, the counterweight 5 is formed by stacking a plurality of magnetic plates 19, and the plurality of magnetic plates 19 are fastened together by bolts, and a plurality of second rolling balls 20 are rotatably arranged on a magnetic plate 19 close to the top plate 4 among the plurality of magnetic plates 19, and the second rolling balls 20 roll on the bottom surface of the top plate 4.

[0047] In the above embodiment, by adjusting the number of assembled magnetic plates 19, the force between the counterweight block 5 and the magnet 9 is adjusted, thereby adjusting the imbalance amount of the imbalance point, so as to facilitate the repositioning of the imbalance point on the propeller 1 according to the imbalance amount, thereby facilitating the trimming of the propeller 1 and avoiding the difficulty in processing the propeller 1 when the position of the imbalance point on the propeller 1 is difficult to trim and operate. The setting of the second rolling ball 20 can help the counterweight block 5 to move smoothly on the top plate 4, thereby reducing friction resistance.

[0048] In some embodiments of the present invention, Figure 1 As shown, the detection device further includes a bottom plate 21, on which a side plate 22 is rolled, and a support ring 23 is sleeved on the outer wall of the rotating drum 6, the side plate 22 is fixedly connected to the support ring 23, and the rotating drum 6 rotates on the support ring 23;

[0049] A detection ring 24 is sleeved on the outer wall of the connecting frame 3 , and the detection ring 24 is coaxial with the main shaft 2 . A distance meter 25 is fixed on the side plate 22 , and the distance meter 25 detects the distance between the side plate 22 and the detection ring 24 .

[0050] In the above embodiment, the bottom plate 21, the side plate 22 and the support ring 23 can support the rotating drum 6 so that the rotating drum 6 can rotate smoothly. When the connecting frame 3 rotates following the main shaft 2, due to the imbalance of the propeller 1, the detection ring 24 will vibrate synchronously. At this time, the rangefinder 25 detects the distance between it and the detection ring 24. When the detection distance is stable, the detection ring 24 rotates smoothly, that is, the propeller 1 rotates smoothly, thereby detecting the state of the propeller 1.

[0051] In some embodiments of the present invention, Figure 3 As shown, a main motor 26 rolls on the bottom plate 21, a first turntable 27 is provided at the output end of the main motor 26, a second turntable 28 is provided at the bottom of the main shaft 2, the first turntable 27, the second turntable 28 and the main shaft 2 are coaxial, and the first turntable 27 and the second turntable 28 are connected by multiple elastic bands 29.

[0052] In the above embodiment, the main motor 26 can drive the main shaft 2 to rotate through the first turntable 27, the second turntable 28 and the elastic belt 29, thereby providing power for the rotation of the propeller 1, and since the elastic belt 29 is deformable, the elastic belt 29 will not interfere with the vibration of the propeller 1.

[0053] In some embodiments of the present invention, Figure 3 to Figure 4 As shown, a tray 30 is coaxially fixed on the main shaft 2, and a plurality of third rolling balls 31 are provided on the upper and lower surfaces of the tray 30. The third rolling balls 31 are located at the edge of the tray 30. A second support ring 32 is sleeved on the outer side of the tray 30. A second annular groove is opened on the circumferential inner wall of the second support ring 32. The third rolling balls 31 are located in the second annular groove and in rolling contact with the inner wall of the second annular groove. The second support ring 32 is fixed to the side plate 22 through a support plate 33.

[0054] In the above embodiment, the support plate 33 and the second support ring 32 can support the tray 30 through the third ball 31, thereby lifting and supporting the main shaft 2. When the main shaft 2 vibrates and rotates, the third ball 31 rolls in the first annular groove on the second support ring 32.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A propeller dynamic balance detection device for a ship, characterized in that: It includes a main shaft, a connecting frame, a top plate and a counterweight. The main shaft is vertical and used to fix the propeller. The top plate is coaxially located above the main shaft. The top plate and the main shaft are connected and fixed by the connecting frame. The counterweight is slidably located on the top plate. When the propeller rotates, the top plate and the counterweight block rotate synchronously, and the propeller rotates smoothly by adjusting the position of the counterweight block on the top plate; The detection device also includes a rotating drum, a moving seat is arranged in the rotating drum, a tensile gauge is arranged at the bottom of the moving seat, and a magnet is arranged at the bottom of the tensile gauge; The counterweight is located on the lower surface of the top plate, the magnet generates an upward magnetic attraction on the counterweight, the dynamometer detects the attraction of the magnet, the rotating drum rotates synchronously with the top plate, a pushing structure is provided on the rotating drum, and the pushing structure is used to adjust the position of the moving seat in the rotating drum, thereby adjusting the position of the counterweight on the top plate with the help of the magnet; A first support ring is provided at the bottom of the rotating drum, and the first support ring is located on the outer side of the top plate. A plurality of first rolling balls are rotatably provided on the upper and lower surfaces of the top plate, and the first rolling balls are located at the edge of the top plate. A first annular groove is provided on the inner wall of the circumference of the first support ring, and the first rolling balls are located inside the first annular groove and in contact with the inner wall of the first annular groove. Wherein, the circumferential outer wall of the top plate and the inner side wall of the first annular groove are connected by a plurality of elastic ropes; The detection device also includes a bottom plate, on which a side plate rolls, and a support ring is sleeved on the outer wall of the rotating drum, the side plate is fixedly connected to the support ring, and the rotating drum rotates on the support ring; A detection ring is sleeved on the outer wall of the connecting frame, and the detection ring is coaxial with the main shaft. A distance meter is fixed on the side plate, and the distance meter detects the distance between the side plate and the detection ring.

2. A ship propeller dynamic balance detection device according to claim 1, characterized in that: The pushing structure includes an adjusting ring rotatably mounted on the inner wall of the rotating drum and a transmission wheel transmission-connected to the adjusting ring, a sliding rod and a threaded rod are arranged on the inner wall of the adjusting ring, both the sliding rod and the threaded rod pass through the moving seat, and the sliding rod is slidably connected to the moving seat, the threaded rod is threadedly connected to the moving seat, and a first micro-motor for providing power for the rotation of the threaded rod is arranged on the inner wall of the adjusting ring; A second micro motor for providing power to the transmission wheel is arranged on the outer wall of the rotating drum.

3. A ship propeller dynamic balance detection device according to claim 2, characterized in that: The counterweight block is formed by stacking a plurality of magnetic plates, and the plurality of magnetic plates are fastened and connected by bolts. A plurality of second rolling balls are rotatably arranged on a magnetic plate close to the top plate among the plurality of magnetic plates, and the second rolling balls roll on the bottom surface of the top plate.

4. A ship propeller dynamic balance detection device according to claim 3, characterized in that: A main motor rolls on the bottom plate, a first turntable is arranged at the output end of the main motor, a second turntable is arranged at the bottom of the main shaft, the first turntable, the second turntable and the main shaft are coaxial, and the first turntable and the second turntable are connected by a plurality of elastic bands.

5. A ship propeller dynamic balance detection device according to claim 4, characterized in that: A tray is coaxially fixed on the main shaft, and a plurality of third rolling balls are arranged on the upper and lower surfaces of the tray, and the third rolling balls are located at the edge of the tray. A second support ring is sleeved on the outer side of the tray, and a second annular groove is opened on the circumferential inner wall of the second support ring. The third rolling balls are located in the second annular groove and in rolling contact with the inner wall of the second annular groove, and the second support ring is fixed to the side plate through a support plate.

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