A device for controlling the positioning accuracy of a marine shafting installation

Abstract

The utility model relates to ship equipment technical field, concretely provides a kind of ship shafting installation positioning precision control device, the control device of the utility model includes;Shafting main component, shafting main component is used to bear ship power transmission and provide shafting coaxality reference;Positioning reference component, positioning reference component is fixed on the hull pedestal, for providing installation positioning reference for shafting main component;Precision detection module, precision detection module is connected with shafting main component, for real-time acquisition radial and axial position deviation data of shafting main component and transmission outward;Fine adjustment adjusting mechanism, fine adjustment adjusting mechanism is set on shafting main component, for driving shafting main component along horizontal and vertical direction adjusting position according to deviation data, positioning reference component is directly fixed on the hull pedestal, avoids reference transfer error, cooperates with the linkage of real-time detection and accurate fine adjustment, can improve shafting positioning precision, simultaneously simplifies installation process.

Description

Technical Field

[0001] This utility model relates to the field of marine equipment technology, specifically providing a device for controlling the positioning accuracy of ship shafting installation. Background Technology

[0002] The ship's shafting system is the core power transmission system connecting the main engine and the propeller. Its installation and positioning accuracy directly determines navigation stability, power efficiency, and equipment lifespan. If indicators such as coaxiality and radial runout exceed the standards, it will cause problems such as shafting vibration and bearing wear, and in severe cases, lead to main engine failure. Therefore, controlling the positioning accuracy of the shafting system is a core challenge in marine engineering.

[0003] The current mainstream approach combines traditional mechanical calibration with simple testing. This includes establishing a baseline using a string line method and an optical collimator, followed by measuring deviations with feeler gauges and dial indicators. Adjustments are made manually by adding or removing shims and tapping bearing seats, requiring repeated disassembly and inspection after adjustment. Small and medium-sized vessels often use a single reference point for positioning, lacking a verification mechanism. Existing traditional testing tools such as dial indicators and levels have an accuracy limit of only 0.01mm, but rely on manual readings and repeated disassembly and assembly, resulting in a single test taking 2-4 hours. Furthermore, human error can reduce the actual accuracy to the 0.05mm level, failing to meet the 0.01mm positioning accuracy requirements of modern ships. While some detection devices using displacement sensors improve accuracy, they are independently set up from the adjustment mechanism, and data cannot be fed back in real time, still requiring manual judgment of the adjustment direction and magnitude.

[0004] Accordingly, there is a need in the field for a new ship shafting installation positioning accuracy control device to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that existing precision control devices are inconvenient to use.

[0006] This utility model provides a ship shafting installation positioning accuracy control device, the control device comprising: A shafting main assembly, which is used to carry the ship's power transmission and provide a shafting coaxiality reference; A positioning reference assembly, which is fixed on the hull base, is used to provide an installation positioning reference for the shafting main assembly; A precision detection module is connected to the main shaft assembly and is used to collect and transmit the radial and axial position deviation data of the main shaft assembly in real time. A fine-tuning mechanism is provided on the main shaft assembly and is used to drive the main shaft assembly to adjust its position in the horizontal and vertical directions according to deviation data.

[0007] Based on the above structural setup, the positioning reference component is directly fixed to the hull base, avoiding reference transmission errors. With the linkage of real-time detection and precise fine-tuning, the positioning accuracy of the shafting can be improved. At the same time, the installation process is simplified, the reliance on manual operation experience is reduced, the installation efficiency is improved, and the shafting installation needs of ships of different tonnages are adapted to.

[0008] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the main shafting component includes a main shaft and a bearing housing. The main shaft is horizontally arranged, and the bearing housing is sleeved on the bottom of the main shaft. The bearing housing cooperates with the main shaft to support the main shaft. The centerline of the main shaft forms the coaxiality reference of the shafting.

[0009] Based on the above structural setup, a support structure with a spindle and bottom bearing housing is adopted. Compared with the traditional side-mounted bearing housing design, the support point is moved down to a position where the spindle is subjected to more balanced forces, which can reduce the deflection deformation of the spindle due to its own weight and make the coaxiality reference of the spindle centerline more stable.

[0010] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the positioning reference component includes a positioning block and a chuck. The positioning block is fixedly connected to the hull base, and the chuck and the positioning block are positioned and cooperate to form a cross positioning reference, which is coplanar with the center line of the main shaft.

[0011] Based on the above structural design, the cross-shaped positioning reference forms a two-way positioning constraint compared to the traditional single chuck design, which can effectively avoid the offset problem that is prone to occur with a single reference, and the flatness error control of the positioning reference is more precise.

[0012] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the positioning block is fixed to the hull base by 4 sets of bolts, and the preload torque of the bolts is 80-100 Nm; the chuck and the positioning hole of the positioning block are interference fit.

[0013] Based on the above structural setup, the symmetrical fixing method of the four sets of bolts, combined with a specific pre-tightening torque, ensures that the connection surface between the positioning block and the hull base is subjected to uniform force, avoids base deformation caused by local stress concentration, and ensures that the flatness error is reduced after the positioning block is installed.

[0014] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the accuracy detection module includes a detection sensor, a mounting base and a signal transmission component. The mounting base is fixed on the bearing seat, the detection sensor is installed on the mounting base, the detection end of the detection sensor is in contact with the outer circumference of the main shaft, and the signal transmission component transmits the deviation data of the detection sensor to an external terminal.

[0015] Based on the above structural design, the integrated installation design of the detection module and bearing housing avoids the installation and positioning errors of traditional independent detection devices, making the fit between the detection end and the spindle more stable.

[0016] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the detection sensor is a capacitive displacement sensor with a measurement range of ±0.5mm and an operating temperature range of -20℃ to 80℃.

[0017] Based on the above structural design, the capacitive displacement sensor has higher accuracy within the core measurement range of ±0.5mm compared to the traditional inductive sensor, and can capture minute deviations at the level of 0.001mm, meeting the high-precision positioning requirements of the shaft system.

[0018] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the detection sensor and the mounting base are connected by a thread.

[0019] Based on the above structural design, the threaded connection, compared with the welding fixing method, is not only easier to install and disassemble, but also facilitates the calibration, maintenance and replacement of sensors, reducing the later operation and maintenance costs.

[0020] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the fine adjustment mechanism includes an adjusting component, a scale component, and a locking component. The adjusting component is installed on the mounting base, the scale component is used to control the adjustment amount, and the locking component is used to lock the position of the adjusting component after the adjustment is completed.

[0021] Based on the above structural design, the locking component can lock the position immediately after adjustment, preventing the adjustment from being reset due to ship vibration and ensuring the long-term stability of the shafting positioning accuracy.

[0022] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the adjusting component is an adjusting bolt, the scale component is an adjusting scale plate, and the locking component is a locking nut; the adjusting bolt is located at the bottom of the mounting base, and the top end of the adjusting bolt is threadedly connected to the mounting plane of the mounting base through a threaded structure.

[0023] In the preferred technical solution of the above-mentioned ship shafting installation positioning accuracy control device, the adjustment bolt has an adjustment stroke of 0-5mm, and the accuracy of the adjustment dial is 0.01mm.

[0024] Based on the above structural design, the 0-5mm adjustment stroke can cover the deviation correction requirements in the installation of ship shafting without the need for additional shims, simplifying the adjustment process; the 0.01mm precision dial provides a precise reference for the adjustment amount, ensuring that the coaxiality error of the shafting is ultimately controlled within 0.01mm, significantly reducing vibration and noise during shafting operation and improving power transmission efficiency. Attached Figure Description

[0025] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which: Figure 1 A schematic diagram of the overall structure of this utility model is shown; Figure 2 A schematic diagram of the adjusting component structure of this utility model is shown.

[0026] Figure label: 1. Spindle; 2. Bearing housing; 3. Positioning block; 4. Chuck; 5. Hull base; 6. Mounting base; 7. Adjusting bolt; 8. Detection sensor; 9. Locking nut. Detailed Implementation

[0027] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0028] It should be noted that in the description of this utility model, the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the structure must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] This utility model provides a ship shafting installation positioning accuracy control device, the control device includes; Shafting main assembly, which is used to carry the ship's power transmission and provide a coaxiality reference for the shafting; The positioning reference assembly is fixed on the hull base 5 and is used to provide an installation positioning reference for the main shaft assembly. The precision detection module is connected to the main shaft system component and is used to collect and transmit the radial and axial position deviation data of the main shaft system component in real time. The fine-tuning mechanism is installed on the main shaft assembly and is used to drive the main shaft assembly to adjust its position in the horizontal and vertical directions according to the deviation data.

[0031] The positioning reference component is directly fixed to the hull base 5, avoiding reference transmission errors. With the linkage of real-time detection and precise fine adjustment, the positioning accuracy of the shafting can be improved. At the same time, the installation process is simplified, the dependence on manual operation experience is reduced, the installation efficiency is improved, and the shafting installation needs of ships of different tonnages are adapted to.

[0032] Furthermore, the main shaft system component includes a spindle 1 and a bearing housing 2. The spindle 1 is horizontally positioned, and the bearing housing 2 is fitted onto the bottom of the spindle 1. The bearing housing 2 cooperates with the spindle 1 to support the spindle 1. The centerline of the spindle 1 forms the coaxiality reference of the shaft system. Compared with the traditional side-mounted bearing housing 2 design, the support point is moved down to a position where the spindle 1 is subjected to more balanced forces, which can reduce the deflection deformation of the spindle 1 caused by its own weight and make the coaxiality reference of the centerline of the spindle 1 more stable.

[0033] Furthermore, the positioning reference component includes a positioning block 3 and a chuck 4. The positioning block 3 is fixedly connected to the hull base 5. The chuck 4 and the positioning block 3 are positioned and cooperate to form a cross positioning reference. This cross positioning reference is coplanar with the center line of the main shaft 1. Compared with the traditional single chuck 4 design, the cross positioning reference forms a two-way positioning constraint, which can effectively avoid the offset problem that is easy to occur with a single reference. The flatness error control of the positioning reference is more accurate.

[0034] Furthermore, the positioning block 3 is fixed to the hull base 5 by 4 sets of bolts with a preload torque of 80-100 Nm; the positioning hole of the chuck 4 and the positioning block 3 are interference fit, and the symmetrical fixing method of the 4 sets of bolts combined with the specific preload torque ensures that the connection surface between the positioning block 3 and the hull base 5 is subjected to uniform force, avoids base deformation caused by local stress concentration, and ensures that the flatness error of the positioning block 3 is reduced after installation.

[0035] Furthermore, the precision detection module includes a detection sensor 8, a mounting base 6, and a signal transmission component. The mounting base 6 is fixed on the bearing housing 2, and the detection sensor 8 is mounted on the mounting base 6. The detection end of the detection sensor 8 is in contact with the outer periphery of the spindle 1. The signal transmission component transmits the deviation data of the detection sensor 8 to an external terminal. The integrated installation design of the detection module and the bearing housing 2 avoids the installation and positioning errors of traditional independent detection devices, making the contact between the detection end and the spindle 1 more stable.

[0036] Furthermore, the detection sensor 8 is a capacitive displacement sensor with a measurement range of ±0.5mm and an operating temperature range of -20℃ to 80℃. Compared with traditional inductive sensors, capacitive displacement sensors have higher accuracy within the core measurement range of ±0.5mm and can capture minute deviations at the level of 0.001mm, meeting the high-precision positioning requirements of shaft systems.

[0037] Furthermore, the detection sensor 8 and the mounting base 6 are connected by threads. Compared with the welding method, the threaded connection is not only convenient for installation and disassembly, but also facilitates the calibration, maintenance and replacement of the sensor, reducing the later operation and maintenance costs.

[0038] Furthermore, the fine-tuning mechanism includes an adjusting component, a scale component, and a locking component. The adjusting component is mounted on the mounting base 6. The scale component is used to control the adjustment amount. The locking component is used to lock the position of the adjusting component after adjustment. The scale component provides a visual basis for the adjustment amount, avoiding blind adjustment and improving the adjustment accuracy. The locking component can lock the position immediately after adjustment to prevent adjustment reset caused by ship vibration and ensure the long-term stability of shaft positioning accuracy.

[0039] Furthermore, the adjusting component is the adjusting bolt 7, the scale component is the adjusting scale, and the locking component is the locking nut 9; the adjusting bolt 7 is located at the bottom of the mounting base 6, and the top of the adjusting bolt 7 is threadedly connected to the mounting plane of the mounting base 6 through a threaded structure.

[0040] Furthermore, the adjusting bolt 7 has an adjustment stroke of 0-5mm, and the adjustment dial has an accuracy of 0.01mm. The 0-5mm adjustment stroke can cover the deviation correction requirements in the installation of the ship shafting system without the need to add or remove shims, simplifying the adjustment process. The 0.01mm accuracy dial provides a precise reference for the adjustment amount, ensuring that the coaxiality error of the shafting system is ultimately controlled within 0.01mm, significantly reducing the vibration and noise of the shafting system during operation and improving the power transmission efficiency.

[0041] The technical solution of this utility model has been described in conjunction with the optional embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A device for controlling the accuracy of the positioning of a marine shafting installation, characterised in that, The control device includes; A shafting main assembly, which is used to carry the ship's power transmission and provide a shafting coaxiality reference; A positioning reference assembly, which is fixed on the hull base, is used to provide an installation positioning reference for the shafting main assembly; A precision detection module is connected to the main shaft assembly and is used to collect and transmit the radial and axial position deviation data of the main shaft assembly in real time. A fine-tuning mechanism is provided on the main shaft assembly and is used to drive the main shaft assembly to adjust its position in the horizontal and vertical directions according to deviation data.

2. The ship shafting installation positioning accuracy control device according to claim 1, characterized in that, The main shaft assembly includes a spindle and a bearing housing. The spindle is horizontally positioned, and the bearing housing is fitted onto the bottom of the spindle and cooperates with the spindle to support it. The centerline of the spindle forms the coaxiality reference of the shaft system.

3. The marine shafting installation alignment accuracy control apparatus according to claim 1, characterized by The positioning reference assembly includes a positioning block and a chuck. The positioning block is fixedly connected to the hull base, and the chuck and the positioning block are positioned together to form a cross positioning reference, which is coplanar with the center line of the main shaft.

4. The ship shafting installation positioning accuracy control device according to claim 3, characterized in that, The positioning block is fixed to the hull base by four sets of bolts, and the preload torque of the bolts is 80-100 Nm; the chuck and the positioning hole of the positioning block are interference fit.

5. The marine shafting installation alignment accuracy control apparatus according to claim 2, characterized by The accuracy detection module includes a detection sensor, a mounting base, and a signal transmission component. The mounting base is fixed on the bearing seat, the detection sensor is mounted on the mounting base, and the detection end of the detection sensor is in contact with the outer circumference of the spindle. The signal transmission component transmits the deviation data of the detection sensor to an external terminal.

6. The vessel shafting installation alignment accuracy control apparatus according to claim 5, characterized in that, The detection sensor is a capacitive displacement sensor with a measurement range of ±0.5mm and an operating temperature range of -20℃ to 80℃.

7. The ship shafting installation positioning accuracy control apparatus according to claim 6, characterized by The detection sensor is threadedly connected to the mounting base.

8. The ship shafting installation positioning accuracy control apparatus according to claim 6, characterized by The fine-tuning mechanism includes an adjusting component and a locking component. The adjusting component is mounted on the mounting base, and the locking component is used to lock the position of the adjusting component after adjustment is completed.

9. The vessel shafting installation alignment accuracy control apparatus according to claim 8, characterized in that, The adjusting component is an adjusting bolt, and the locking component is a locking nut; the adjusting bolt is located at the bottom of the mounting base, and the top end of the adjusting bolt is threadedly connected to the mounting plane of the mounting base through a threaded structure.

10. The vessel shafting installation alignment accuracy control apparatus according to claim 9, characterized in that, The adjusting bolt has an adjustment range of 0-5mm.

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