Propeller stroke feedback device for ship thruster
By designing a propeller stroke feedback device for ship propeller, the pitch stroke of the blade is converted into mechanical feedback signal by using a high-pressure oil chamber and feedback mechanism, the problem of insufficient mechanical transmission accuracy in the prior art is solved, and the problem of High-precision mechanical feedback.
Patent Information
- Application Number
- CN202411605805.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-02-14
AI Technical Summary
Existing ship propellers need to accurately transmit the pitch stroke at the blade through mechanical transmission mechanisms, and require high control accuracy, but it is difficult to achieve accurate mechanical feedback.
Design a propeller stroke feedback device, including a feedback mechanism and a hub, uses a high-pressure oil chamber and a piston to drive the blade to rotate, and convert linear motion into circular motion through the oil distribution ring and the connecting flange, combining scale and angle sensor Convert mechanical feedback signal.
It realizes accurate calculation output of blade pitch stroke, improves the accuracy of mechanical feedback, and meets the needs of ship thrusters for high maneuverability and flexibility.
Smart Images
Figure CN119429050A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ship propellers, and in particular to a propeller stroke feedback device for ship propellers. Background Art
[0002] The controllable pitch propeller (CPP) is a type of ship propeller. Its main feature is that the thrust and direction of the propeller can be quickly changed by adjusting the pitch of the propeller blades, unlike the conventional fixed pitch propeller (FPP), which requires the frequency converter to control the rotation direction and speed of the drive motor to adjust the thrust direction and size of the propeller.
[0003] Generally speaking, it takes less than 30 seconds for an adjustable pitch propeller to adjust from the maximum thrust in one direction to the maximum thrust in another direction. This not only reflects the high maneuverability and flexibility of the adjustable pitch propeller, but also places relatively high demands on control accuracy. The pitch stroke that is difficult to measure at the blade needs to be accurately transmitted through the mechanical transmission mechanism, and is also used for signal input of the electronic control system, thereby improving the accuracy of the mechanical feedback of the blade pitch.
[0004] In view of the above problems, it is urgent to design a pitch stroke feedback mechanism for an adjustable pitch propeller to calculate and output the pitch stroke at the blade. Summary of the invention
[0005] In order to solve the existing technical problem that the pitch stroke which is inconvenient to measure at the blade needs to be accurately transmitted through a mechanical transmission mechanism, the present invention provides a propeller stroke feedback device for a ship propeller.
[0006] The present invention is implemented by the following technical scheme: a propeller stroke feedback device for a ship thruster, comprising a feedback mechanism and a hub, a plurality of blades are installed on the outside of the hub, a high-pressure oil chamber is arranged inside the hub, a piston is movably connected to the inside of the high-pressure oil chamber, the movement of the piston drives the blades to rotate and change the pitch of the blades, and the rotation of the blades drives the oil distribution ring to move, the feedback mechanism comprises a connecting flange, one end of the connecting flange is fixedly connected to a feedback guide frame, one end of the feedback guide frame is slidably connected to a feedback slider, the top of the feedback slider is fixedly connected to a feedback shaft, the outside of the feedback shaft is rotatably connected to a connecting plate, one end of the connecting plate is fixedly connected to a feedback rod, two couplings are arranged in the middle of the feedback rod, one end of the feedback rod is fixedly connected to a spherical bearing, the other end of the feedback rod is fixedly connected to a joint, one end of the joint is fixedly connected to a base, the top of the base is fixedly connected to a scale, and the top of the scale is provided with an angle sensor.
[0007] Preferably, the connecting flange and the oil distribution ring are fixedly connected and move synchronously.
[0008] Preferably, the feedback guide is used to simulate the function of the guide in the hub, the feedback guide provides power for axial movement of the feedback slider, and one end of the feedback guide provides a track for the feedback slider.
[0009] Preferably, the feedback slider is involved in two movements simultaneously, namely, the axial linear movement provided by the feedback guide and the circular movement around the center of the feedback rod.
[0010] Preferably, the spherical bearing adjusts the up-and-down misalignment of the feedback mechanism within a certain range, thereby reducing the friction during the rotation of the feedback rod.
[0011] Preferably, the coupling is located in the middle of the feedback rod, and the coupling is used to adjust a larger position deviation in the system.
[0012] Preferably, the scale is used to convert the travel feedback signal into a scale form for reading the angle sensor.
[0013] Preferably, the pitch angle of the blade rotation is calculated as follows: θ0=arcsin(s / r0); θ1=arcsin(s / r1); when r1=r0, θ1=θ0; In the above formula, θ0 is the blade rotation angle of the blade, r0 is the distance from the slider in the guide frame to the center of the blade, s is the stroke of the piston when the blade rotates θ0, θ1 is the angle of mechanical feedback, and r1 is the distance from the feedback slider in the feedback mechanism to the center of the feedback rod.
[0014] Preferably, the finishing length of the connecting plate is r1, and r1=r0. The connecting plate is used to simulate the pitch adjustment motion in the hub in a 1:1 manner and complete the conversion of the linear motion to the circular motion signal.
[0015] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, the oil distribution ring will drive the connecting flange to make linear motion, the connecting flange will drive the feedback guide frame to move, the feedback guide frame will drive the feedback slider to move, so that the feedback slider moves linearly inside the feedback guide frame and at the same time moves in a circular motion around the center of the feedback rod, the feedback slider will drive the connecting plate to rotate, and the rotation of the connecting plate will drive the feedback rod to rotate, thereby restoring the linear motion to circular motion, and the scale is used to convert the stroke feedback signal into a scale form to facilitate reading the angle sensor, thereby providing electrical signal feedback based on mechanical feedback. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2It is the hydraulic principle diagram of the propeller of the present invention.
[0017] In the figure: 1. connecting flange; 2. feedback guide; 3. feedback slider; 4. feedback shaft; 5. connecting plate; 6. spherical bearing; 7. coupling; 8. feedback rod; 9. joint; 10. base; 11. scale; 12. angle sensor. DETAILED DESCRIPTION
[0018] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.
[0019] Example 1: Please refer to Figure 1 - Figure 2 , a propeller stroke feedback device for a ship thruster of the present embodiment comprises a feedback mechanism and a hub, a plurality of blades are installed on the outside of the hub, a high-pressure oil chamber is arranged inside the hub, a piston is movably connected inside the high-pressure oil chamber, the movement of the piston drives the blades to rotate and change the pitch of the blades, and the rotation of the blades drives the oil distribution ring to move, the feedback mechanism comprises a connecting flange 1, one end of the connecting flange 1 is fixedly connected to a feedback guide frame 2, one end of the feedback guide frame 2 is slidably connected to a feedback slider 3, the top of the feedback slider 3 is fixedly connected to a feedback shaft 4, the outside of the feedback shaft 4 is rotatably connected to a connecting plate 5, one end of the connecting plate 5 is fixedly connected to a feedback rod 8, two couplings 7 are arranged in the middle of the feedback rod 8, one end of the feedback rod 8 is fixedly connected to a spherical bearing 6, the other end of the feedback rod 8 is fixedly connected to a joint 9, one end of the joint 9 is fixedly connected to a base 10, the top of the base 10 is fixedly connected to a scale 11, and the top of the scale 11 is provided with an angle sensor 12; The connecting flange 1 is connected with the oil distribution ring for synchronous movement, and the axial stroke of the slider in the hub is obtained in a 1:1 ratio for subsequent feedback signals. The feedback guide 2 is used to simulate the guide function in the hub, provide axial motion power for the feedback slider 3, and provide a track for the feedback slider 3. The feedback slider 3 participates in two movements at the same time, namely, the axial linear motion provided by the feedback guide 2 and the circular motion around the center of the feedback rod 8. Secondly, the spherical bearing 6 can adjust the upper and lower misalignment of the feedback mechanism within a certain range, reducing the friction during the rotation of the feedback rod 8. The coupling 7 can introduce one or two pieces in the middle of the feedback rod according to the actual alignment situation to adjust the larger position deviation in the system. The joint 9 is used as the positioning point of the feedback mechanism on the upper part of the propeller. The scale 11 is used to convert the stroke feedback signal into a scale form to facilitate reading the angle sensor 12, which is an electrical signal feedback based on mechanical feedback. At the same time, due to the large upper and lower span of the propeller and the large processing error, the fixed point of the feedback mechanism is difficult to center, and it is necessary to use the method of the coupling 7 and the spherical bearing 6 to eliminate the resulting centering deviation; Furthermore, according to the prior art, when the pitch controllable propeller is used to adjust the pitch of the blades, the hydraulic pump is first turned on, and high-pressure hydraulic oil is injected into the high-pressure chamber in the hub through the A / B interface, and the scale marks on the hub and the blades are aligned, and the pitch angle is adjusted so that the blades are at the pitch angle zero position. At this time, the mechanical dial is adjusted to zero, and at the same time, the hydraulic oil enters the piston high-pressure oil chamber in the hub, pushing the axial displacement of the piston, and the piston will drive the blades to complete the variable pitch movement, and the oil distribution pipe assembly is connected to the piston for synchronous movement; Among them, since the connecting flange 1 is connected to the oil distribution ring in the oil distribution pipe assembly, the oil distribution ring will drive the connecting flange 1 to make linear motion, the connecting flange 1 will drive the feedback guide frame 2 to move, and the feedback guide frame 2 will drive the feedback slider 3 to move, so that the feedback slider 3 moves linearly inside the feedback guide frame 2 while moving in a circular motion around the center of the feedback rod 8, the feedback slider 3 will drive the connecting plate 5 to rotate, and the rotation of the connecting plate 5 will drive the feedback rod 8 to rotate, thereby restoring the linear motion to a circular motion, and the scale 11 is used to convert the stroke feedback signal into a scale form to facilitate reading the angle sensor 12, which is an electrical signal feedback based on mechanical feedback; The present invention uses a feedback mechanism and a geometric conversion relationship between mechanical stroke and angle to provide 1:1 feedback of the rotation pitch angle at the blade. The pitch angle of the blade rotation is calculated as follows: θ0=arcsin(s / r0); θ1=arcsin(s / r1); when r1=r0, θ1=θ0; in the above formula, θ0 is the blade rotation angle of the blade, r0 is the distance from the slider in the guide frame to the center of the blade, s is the stroke of the piston when the blade rotates θ0, θ1 is the angle of mechanical feedback, and r1 is the distance from the feedback slider 3 to the center of the feedback rod 8 in the feedback mechanism; Furthermore, the connecting plate 5 can be finely processed to ensure that r1=r0. Here, the structure can simulate the pitch adjustment motion in the hub in a 1:1 manner and complete the conversion of the linear motion to the circular motion signal. Working principle: When the pitch of the blades is adjusted by the pitch control thruster, the hydraulic pump is first turned on, and high-pressure hydraulic oil is pumped into the high-pressure chamber in the hub through the A / B interface. The hydraulic oil enters the high-pressure oil chamber of the piston in the hub, pushing the axial displacement of the piston. The oil distribution pipe assembly is connected to the piston and moves synchronously. The oil distribution ring will drive the connecting flange 1 to make a linear motion, and the connecting flange 1 will drive the feedback guide 2 to move. The feedback guide 2 will drive the feedback slider 3 to move, so that the feedback slider 3 moves in a circle around the center of the feedback rod 8 while moving linearly inside the feedback guide 2. The feedback slider 3 will drive the connecting plate 5 to rotate, and the rotation of the connecting plate 5 will drive the feedback rod 8 to rotate, thereby restoring the linear motion to a circular motion. The scale 11 is used to convert the stroke feedback signal into a scale form to facilitate the reading of the angle sensor 12, thereby providing electrical signal feedback based on mechanical feedback.
[0020] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A propeller stroke feedback device for a ship propeller, comprising a feedback mechanism and a hub, wherein a plurality of blades are mounted on the outside of the hub, a high-pressure oil chamber is arranged inside the hub, a piston is movably connected inside the high-pressure oil chamber, the movement of the piston drives the blades to rotate and change the pitch of the blades, and the rotation of the blades drives the oil distribution ring to move; It is characterized in that The feedback mechanism comprises a connecting flange (1), one end of the connecting flange (1) is fixedly connected to a feedback guide frame (2), one end of the feedback guide frame (2) is slidably connected to a feedback slider (3), the top of the feedback slider (3) is fixedly connected to a feedback shaft (4), the outside of the feedback shaft (4) is rotatably connected to a connecting plate (5), one end of the connecting plate (5) is fixedly connected to a feedback rod (8), two couplings (7) are arranged in the middle of the feedback rod (8), one end of the feedback rod (8) is fixedly connected to a joint bearing (6), the other end of the feedback rod (8) is fixedly connected to a joint (9), one end of the joint (9) is fixedly connected to a base (10), the top of the base (10) is fixedly connected to a scale (11), and the top of the scale (11) is provided with an angle sensor (12).
2. A propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The connecting flange (1) and the oil distribution ring are fixedly connected and move synchronously.
3. The propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The feedback guide frame (2) is used to simulate the function of a guide frame in a propeller hub. The feedback guide frame (2) provides axial movement power for the feedback slider (3). At the same time, one end of the feedback guide frame (2) provides a track for the feedback slider (3).
4. A propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The feedback slider (3) is simultaneously involved in two movements, namely, axial linear movement provided by the feedback guide frame (2) and circular movement around the center of the feedback rod (8).
5. The propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The joint bearing (6) adjusts the vertical misalignment of the feedback mechanism within a certain range, thereby reducing the friction during the rotation of the feedback rod (8).
6. The propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The coupling (7) is located in the middle of the feedback rod (8), and the coupling (7) is used to adjust a larger position deviation in the system.
7. The propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The scale (11) is used to convert the travel feedback signal into a scale form for reading the angle sensor (12).
8. The propeller stroke feedback device for a ship propeller according to claim 1, characterized in that: The pitch angle of the blade rotation is calculated as follows: θ0=arcsin(s / r0); θ1=arcsin(s / r1); when r1=r0, θ1=θ0; In the above formula, θ0 is the blade rotation angle of the blade, r0 is the distance from the slider in the guide frame to the center of the blade, s is the stroke of the piston when the blade rotates θ0, θ1 is the mechanical feedback angle, and r1 is the distance from the feedback slider (3) to the center of the feedback rod (8) in the feedback mechanism.
9. A propeller stroke feedback device for a ship propeller according to claim 8, characterized in that: The connection plate (5) has a precision-machined length of r1, and r1=r0. The connection plate (5) is used to simulate the pitch adjustment motion in the hub in a 1:1 manner, and complete the conversion of the linear motion signal into the circular motion signal.