High-reliability rudder angle indicating device for pod propeller

Abstract

The invention discloses a high-reliability rudder angle indicating device for a pod propulsor, which comprises a propulsion motor top flange with a threaded hole and a driving lever which is arranged on the propulsion motor top flange and is provided with a rectangular groove, and further comprises a driving nail which penetrates through the rectangular groove and is screwed into the threaded hole, a sensor support, a first bevel gear and a rolling bearing are sequentially installed on the mandrel, the inner wall face of the sliding ring structure abuts against the outer circle face of the rolling bearing, the top of the sliding ring structure is provided with a dial plate with a pointer and a second bevel gear meshed with the first bevel gear through a dial plate support, and an angular displacement sensor or / and an encoder is installed on the sensor support. The device is high in environmental adaptability, low in requirement for the assembly precision of the steering module and the propelling module of the pod propeller, insensitive, easy to install, high in reliability and accuracy, convenient to adjust and good in maintainability and redundancy.

Description

Technical Field

[0001] The invention belongs to the technical field of ship design, and in particular relates to a high-reliability rudder angle indicating device for a podded propeller. Background Art

[0002] Podded propulsion systems are increasingly being used on various vessels, particularly survey vessels and icebreakers, due to their unique advantages in vector propulsion and low noise levels. Since the propulsion module of a podded propulsion system is located below the surface, reliable, real-time, and intuitive monitoring of its position is essential for accurate steering of the vessel.

[0003] Previous rudder angle indicating devices consisted of a pulley mounted on a slip ring through a multi-stage transmission mechanism such as a reducer. The design was relatively complex, and the nylon and plastic structural parts would slip over a long period of use, affecting the accuracy. The device also had high requirements for installation accuracy, poor workability, and was prone to wear, resulting in deviations in the rudder angle indicating product. Summary of the Invention

[0004] In order to solve the above problems in the prior art, the purpose of the present invention is to provide a high-reliability rudder angle indicating device for a podded propulsion system.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-reliability rudder angle indicating device for a pod propulsion unit, comprising a propulsion motor top flange with a threaded hole and a shift lever with a rectangular groove placed on the propulsion motor top flange, and also comprising a shift pin passing through the rectangular groove and screwed into the threaded hole, the threaded hole corresponding to the zero degree of the rudder on the pod propulsion unit, a core shaft inserted into the shift lever, a sensor bracket, a first bevel gear and a rolling bearing mounted on the core shaft in sequence, a slip ring structure located below the first bevel gear is arranged outside the core shaft, the inner wall surface of the slip ring structure abuts against the outer cylindrical surface of the rolling bearing, a dial with a pointer and a second bevel gear meshing with the first bevel gear are respectively arranged on the top of the slip ring structure through a dial bracket, and an angular displacement sensor and / or an encoder are mounted on the sensor bracket.

[0006] The high-reliability rudder angle indicating device for a pod thruster has a second bevel gear connected to a pointer via a short shaft, a compression spring sleeved on the short shaft is provided between the second bevel gear and the dial bracket, and after the compression spring is sleeved on the short shaft, the first bevel gear and the second bevel gear can be ensured to engage in real time and accurately transmit angular displacement, a sliding bearing is installed outside the short shaft, and the dial bracket is fixed on the sliding bearing.

[0007] The high-reliability rudder angle indicating device for a pod thruster has two sensor brackets, wherein the angular displacement sensor or / and encoder on one sensor bracket are connected to a core shaft, and the angular displacement sensor or / and encoder on the other sensor bracket are connected to a short shaft.

[0008] The high-reliability rudder angle indicating device for a podded propulsion system is further equipped with a third bevel gear located below the lower rolling bearing on its core shaft. A dial with a pointer and a fourth bevel gear meshing with the third bevel gear are respectively provided at the bottom of the slip ring structure through another dial bracket. An angular displacement sensor and / or an encoder are installed on the sensor bracket.

[0009] The high-reliability rudder angle indicator device for a podded propulsion system is characterized in that the first bevel gear reliably transmits angular displacement to the core shaft via a flat key. The core shaft has a rectangular protrusion machined into the top for inserting an angular displacement sensor and / or an encoder rotor to transmit angular displacement; and the top of one end of the stub shaft has a rectangular protrusion for inserting an angular displacement sensor and / or an encoder rotor to transmit angular displacement.

[0010] The beneficial effects of the present invention are:

[0011] The present invention has low requirements for the assembly accuracy of the podded propulsion steering module and the propulsion module, is not sensitive, and is simple to install. It does not require the steering module and the propulsion module to be strictly coaxial, that is, the axis of the rudder angle indication device transmission shaft is allowed to be eccentric and non-parallel to the axis of the top flange of the propulsion module, so it has high environmental adaptability. Since the shifting rod is designed with a rectangular groove, it can slide freely on the top flange of the propulsion module - this misaligned sliding can compensate for the eccentricity of the axis and the non-parallelism of the axis angle. At the same time, as long as the shifting pin fixed to the top flange of the propulsion module has an angular displacement along the circumferential direction, it can be reflected on the shifting rod, thereby driving the core shaft to rotate. This structure realizes the compensation of the axis misalignment of the rudder angle feedback device installation and improves its reliability.

[0012] The present invention only requires a pair of bevel gears to intuitively reflect the position of the pod propulsion motor inside the cabin. The compression spring and sliding bearing design ensure real-time meshing of the two bevel gears, unaffected by impact vibration, thereby ensuring the reliability and accuracy of rudder angle feedback. The second bevel gear, short shaft, and pointer can be disengaged from the first bevel gear as a whole along the sliding bearing, facilitating zero adjustment with the dial and the level sensor. As a result, reliability and accuracy are high, and adjustment is convenient.

[0013] Compared with the mechanical structural parts in the existing rudder angle indicating device, the wearing parts of the present invention are electronic devices - angular displacement sensors and / or encoders, and all sensors are designed to be installed outside the slip ring structure, which is convenient for disassembly and installation. In addition, two angular position sensors are configured to serve as hot backup for each other, so it has good maintainability and redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the present invention without the slip ring structure;

[0015] Figure 2It is a schematic diagram of the overall structure of the back of the present invention;

[0016] Figure 3 It is a schematic diagram of the overall structure of the front side of the present invention.

[0017] The figures are marked as follows: 1—pin, 2—lever, 3—core shaft, 4—rolling bearing, 5—first bevel gear, 6—second bevel gear, 7—flat key, 8—sensor bracket, 9—compression spring, 10—dial bracket, 11—sliding bearing, 12—short shaft, 13—pointer, 14—screw, 15—angular displacement sensor and / or encoder, 16—slip ring structure, 17—propulsion motor top flange, 18—dial. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely intended to illustrate the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the various components in the drawings are drawn at specific proportions, these proportions are merely illustrative and those skilled in the art may adjust them as needed to suit specific applications.

[0019] It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation. Therefore, they cannot be understood as limiting the invention.

[0020] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and connections within two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] Reference Figure 1 、 Figure 2 and Figure 3As shown, the present invention discloses a high-reliability rudder angle indicating device for a pod propulsion system, wherein the shift rod 2 is placed on the top flange 17 of the propulsion motor, and the two are only in contact and do not transmit motion, that is, they can slide freely between them; the shift pin 1 is inserted into the rectangular groove of the shift rod 2, and the shift pin 1 can slide freely along the rectangular groove of the shift rod 2. At the same time, the shift pin 1 is screwed into the threaded hole of the top flange 17 of the propulsion motor, and the threaded hole corresponds to the positive direction of the propeller on the pod propulsion system, that is, the threaded hole is at 0 degrees, and the core shaft 3 is inserted into the circular hole of the shift rod 2, and the core shaft 3 transmits angular displacement through the flat key 7; the sensor bracket 8, the first bevel gear 5 made of wear-resistant alloy steel and the upper and lower supporting rolling bearings 4 are installed on the core shaft 3 in sequence, and a slip ring structure 16 is provided on the outside of the core shaft 3 and is located below the first bevel gear 5. The height of the first bevel gear 5 is higher than the slip ring structure 16, and the outer circle of the rolling bearing 4 is fixed on the inner wall of the slip ring structure 16, supporting the core shaft 3 but not restricting its rotation The first bevel gear 5 reliably transmits angular displacement through the flat key 7. Two sensor brackets 8 are installed on the top of the slip ring structure 16, and angular displacement sensors or / and encoders 15 are installed on the top and side; the top of the core shaft 3 is processed into a rectangular protrusion for inserting the angular displacement sensor or / and encoder 15 rotor to transmit angular displacement; a dial bracket 10 is provided on the top of the slip ring structure 16, on which a sliding bearing 11 and a dial 18 are mounted; a short shaft 12 is installed in the sliding bearing 11 by a screw 14, and a wear-resistant alloy steel second bevel gear 6 is fixed on the short shaft 12. The second bevel gear 6 and the first bevel gear 5 have exactly the same structural dimensions. A compression spring 9 is inserted into the short shaft 12, which ensures that the two bevel gears 56 are engaged in real time and accurately transmit angular displacement; a rectangular protrusion is provided on the top of one end of the short shaft 12 for inserting the angular displacement sensor or / and encoder 15 rotor to transmit angular displacement, and the other end is designed with two internal threads for mounting a pointer 13. When the zero position needs to be adjusted or a horizontally arranged sensor needs to be installed or replaced, the short shaft 12, the bevel gear 6 and the pointer 13 are pulled out along the sliding bearing 11 and the pointer 13 is rotated for adjustment.

[0022] Furthermore, the spindle 3 is also mounted with a third bevel gear below the lower rolling bearing 4. A dial 18 with a pointer 13 and a fourth bevel gear meshing with the third bevel gear 5 are mounted on the bottom of the slip ring structure 16 via a separate dial bracket 10. An angular displacement sensor and / or encoder 15 are mounted on the sensor bracket 8. This provides an additional meshing measurement device. The third and fourth bevel gears correspond to the first and second bevel gears 5 and 6, respectively. The steering angle can also be directly read through the steering module's glass window, enabling multi-angle reading of the steering angle.

[0023] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application. A person skilled in the art may make several modifications and improvements without departing from the inventive concept of the present invention, and all of these modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A high-reliability rudder angle indicating device for a podded propulsion system, characterized in that: The invention comprises a propulsion motor top flange (17) with a threaded hole and a shifting rod (2) with a rectangular groove placed on the propulsion motor top flange (17), and a shifting pin (1) passing through the rectangular groove and screwed into the threaded hole. A core shaft (3) is inserted into the shifting rod (2), and a sensor bracket (8), a first bevel gear (5) and a rolling bearing (4) are sequentially mounted on the core shaft (3). A slip ring structure (16) located below the first bevel gear (5) is arranged outside the core shaft (3), and the inner wall surface of the slip ring structure (16) abuts against the outer cylindrical surface of the rolling bearing (4). A dial (18) with a pointer (13) and a second bevel gear (6) meshing with the first bevel gear (5) are respectively arranged on the top of the slip ring structure (16) through a dial bracket (10). An angular displacement sensor and / or an encoder (15) are mounted on the sensor bracket (8).

2. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 1, characterized in that: The second bevel gear (6) is connected to the pointer (13) via a short shaft (12). A compression spring (9) sleeved on the short shaft (12) is provided between the second bevel gear (6) and the dial bracket (10). A sliding bearing (11) is installed outside the short shaft (12). The dial bracket (10) is fixed on the sliding bearing (11).

3. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 2, characterized in that: There are two sensor brackets (8), one sensor bracket (8) having an angular displacement sensor or / and an encoder (15) connected to the core shaft (3), and the other sensor bracket (8) having an angular displacement sensor or / and an encoder (15) connected to the short shaft (12).

4. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 1, 2 or 3, characterized in that: The core shaft (3) is also provided with a third bevel gear located below the rolling bearing (4). The bottom of the slip ring structure (16) is provided with a dial (18) with a pointer (13) and a fourth bevel gear meshing with the third bevel gear (5) through a dial bracket (10). The sensor bracket (8) is provided with an angular displacement sensor and / or an encoder (15).

5. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 4, characterized in that: The first bevel gear (5) transmits angular displacement to the core shaft (3) via the flat key (7).

6. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 4, characterized in that: The top of the core shaft (3) is provided with a rectangular protrusion for inserting an angular displacement sensor and / or an encoder (15).

7. A high-reliability rudder angle indicating device for a podded propulsion system according to claim 4, characterized in that: The top of the short shaft (12) is provided with a rectangular protrusion for inserting an angular displacement sensor and / or an encoder (15).

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