Integrated electric steering oar thruster

Abstract

The invention discloses an integrated electric steering oar thruster in the technical field of thrusters. The integrated electric steering oar thruster comprises a permanent magnet motor, a well box assembly, a steering stand column and a lower gearbox assembly which are sequentially connected. The output end of the permanent magnet motor is installed in the well box assembly, an output shaft of the permanent magnet motor is connected with a lower gearbox bevel gear shaft in the lower gearbox assembly through an elastic coupler, and the elastic coupler is arranged in the well box assembly and penetrates through the steering stand column. And the bevel gear shaft of the lower gearbox is in transmission connection with a propeller shaft of the propeller. The permanent magnet motor and the steering oar body are integrated together, the elastic coupler is installed in the steering oar, the problems that a traditional Z-shaped electric steering oar is low in transmission efficiency and an L-shaped electric steering oar is too high are solved, meanwhile, the transmission efficiency is improved, the installation steps of a shipyard are simplified, and the steering oar is green, energy-saving and environmentally friendly; the included angle between the propeller shaft and the vertical shaft is 98 degrees, so that the open water efficiency of the propeller is improved; monitoring equipment is added, and the reliability of the steering oar is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of propellers, and more specifically, relates to an integrated electric rudder propeller propeller. Background Art

[0002] Electric rudder propellers are widely used in ships with high maneuverability requirements because they can make ships have good maneuverability, are green, energy-saving and environmentally friendly. In the prior art, electric rudder propellers on ships are either arranged in a Z-type motor connected to the rudder propeller through an elastic shaft, or in an L-type motor vertically installed on the top of the rudder propeller.

[0003] The Z-type electric propeller has a complex structure, and the propeller itself has an upper gearbox for commutation, which increases efficiency loss. It is also difficult to install on site, as the motor and propeller body need to be installed separately and the shaft system needs to be aligned. Although the L-type electric propeller reduces the upper gearbox, the motor and propeller still require a high-elastic connection, which makes installation complicated. In addition, the height often exceeds the depth of the hull, which reduces the adaptability of this solution. Summary of the invention

[0004] The object of the present invention is to provide an integrated electric rudder propeller in view of the above shortcomings, which has a compact structure, is easy to install, reduces shaft system parts, improves transmission efficiency and simplifies the installation steps in the shipyard.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions: The present invention provides an integrated electric rudder propeller, comprising a permanent magnet motor, a well box assembly, a steering column and a lower gear box assembly which are connected in sequence; the permanent magnet motor is mounted on the well box assembly, and the output shaft of the permanent magnet motor is connected to the lower gear box bevel gear shaft in the lower gear box assembly through an elastic coupling, the elastic coupling is arranged in the well box assembly and passes through the steering column; the lower gear box bevel gear shaft is drivingly connected to the propeller shaft of the propeller.

[0006] Furthermore, the permanent magnet motor is installed in a groove at the top of the well box assembly, and a propeller input seal is provided between the output shaft of the permanent magnet motor and the bottom of the groove.

[0007] Furthermore, a liquid level sensor and a well box oil suction pipe connected to the oil pump are provided in the groove; the permanent magnet motor is also equipped with a pneumatic brake device. When the liquid level sensor detects the oil level, that is, the rudder propeller input seal fails, the oil pump starts and sends out an audible and visual alarm when the liquid level reaches a certain height, and the oil is pumped out through the well box oil suction pipe to prevent the lubricating oil from entering the permanent magnet motor and causing certain damage to the motor. When the permanent magnet motor stops, the pneumatic brake device closes to prevent the water flow from driving the propeller to rotate.

[0008] Furthermore, the bottom of the steering column is connected to the housing of the lower gear box assembly, and the top is connected to the cone of the well box assembly. The cone is connected to the electric steering device through a slewing bearing. The electric steering device drives the slewing bearing, the cone, the steering column, the lower gear box assembly and the propeller to rotate 360° around the center of the steering column.

[0009] Furthermore, a screw pump is provided in the well box assembly, and the screw pump is sleeved on the elastic coupling, and the lubricating oil of the lower gear box assembly is pressed into the well box assembly through the inner hole of the elastic coupling, and the lubricating oil in the well box assembly falls into the lower gear box assembly by gravity, forming an up and down circulation. The housing of the lower gear box assembly is in contact with seawater, and heat exchange can be performed between the housing of the lower gear box assembly and the seawater during the circulation process to achieve cooling of the lubricating oil.

[0010] Furthermore, the included angle between the propeller shaft and the bevel gear shaft of the lower gear box is 98° to improve the efficiency of the propeller.

[0011] Furthermore, the bevel gear shaft of the lower gear box is meshed with the sleeve and the spiral bevel gear on the propeller shaft to transmit torque, and the propeller shaft and the propeller taper are keyless sleeve and.

[0012] Furthermore, the lower gearbox assembly also includes a propeller shaft bearing seat for mounting the propeller shaft, and a temperature sensor is provided in the propeller shaft bearing seat; the propeller shaft bearing temperature can be monitored in real time, and whether the bearing has an abnormality can be determined based on the monitored data, thereby ensuring the reliability of the system.

[0013] Furthermore, a stern seal assembly is provided between the propeller shaft and the housing of the lower gearbox assembly, and the stern seal assembly includes a shell and a stern shaft lip seal, the shell is a split type, and the stern shaft lip seal is a split type seal.

[0014] Furthermore, the thruster is also equipped with a motor maintenance platform, which contains a hydraulic jack device. The jack is folded up when not in use. Once the motor fails, the motor can be hoisted onto the maintenance platform for maintenance on board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The invention integrates the permanent magnet motor with the propeller body, and the elastic coupling is installed inside the propeller, which solves the problems of low transmission efficiency of the traditional Z-type electric propeller and too high height of the L-type electric propeller, while improving the transmission efficiency and simplifying the installation steps of the shipyard, which is green, energy-saving and environmentally friendly. The present invention installs the shaft head of the permanent magnet motor in the well box, reduces the upper gear box and its components, and improves the transmission efficiency; the mechanical high elastic (i.e., elastic coupling) is installed inside the rudder propeller, and all installation work is completed at the rudder propeller manufacturer. When installing at the shipyard, there is no need to align the shaft system, which means that the shaft system parts are reduced, and the alignment and installation work of the shipyard is reduced while reducing the height; The angle between the propeller shaft and the vertical shaft (bevel gear shaft of the lower gear box) of the present invention is designed to be 98°, thereby improving the open water efficiency of the propeller; adding monitoring equipment to improve the reliability of the rudder propeller; the stern seal housing adopts a segmented type, and the stern lip seal adopts a split seal, so that the lip seal at any position can be replaced without disassembling the propeller shaft or the propeller, thereby improving the sealing reliability and the removal and replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an integrated electric rudder propeller provided in an embodiment of the present invention; In the figure: 1. permanent magnet motor; 2. well box assembly; 3. steering column; 4. lower gear box assembly; 5. stern seal assembly; 6. propeller; 7. permanent magnet motor rotor shaft; 8. rudder propeller input seal; 9. elastic coupling; 10. lower gear box bevel gear shaft; 11. propeller shaft; 12. electric steering device; 13. slewing bearing; 14. cone; 15. screw pump; 16. propeller shaft bearing seat; 17. pneumatic brake device; 18. liquid level sensor; 19. oil pump; 20. well box oil suction pipe; 21. temperature sensor; 22 motor maintenance platform. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention will be described in more detail below in conjunction with the accompanying drawings and specific examples.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] 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 integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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 by specific circumstances.

[0020] Example 1 This embodiment provides an integrated electric propeller propeller. Figure 1 As shown, it includes a permanent magnet motor 1, a well box assembly 2, a steering column 4 and a lower gear box assembly 4 which are connected in sequence; The output end of the permanent magnet motor 1 is vertically installed in the well box assembly 2, and the output shaft of the permanent magnet motor 1 is connected to the lower gear box bevel gear shaft 10 in the lower gear box assembly 4 through an elastic coupling 9. The elastic coupling 9 is arranged in the well box assembly 2 and passes through the steering column 3; the elastic coupling 9 is installed inside the rudder propeller. Compared with the traditional external elastic coupling 9, all installation work is completed at the rudder propeller manufacturer, and there is no need to align the shaft system when installing at the shipyard, which reduces the shaft system parts, improves the transmission efficiency and simplifies the installation steps at the shipyard.

[0021] The lower gearbox bevel gear shaft 10 is transmission-connected to the propeller shaft 11 of the propeller 6 , and the included angle between the propeller shaft 11 and the lower gearbox bevel gear shaft 10 is 98°, thereby improving the open water efficiency of the propeller 6 .

[0022] Example 2 This embodiment provides an integrated electric propeller thruster. On the basis of Embodiment 1, the technical solution is further refined to achieve more beneficial technical effects. For contents not fully described in this embodiment, please refer to Embodiment 1.

[0023] In this embodiment, the permanent magnet motor rotor shaft 7 is both the output shaft of the permanent magnet motor 1 and the input shaft of the rudder propeller. A groove is provided on the top of the well box assembly 2, and the permanent magnet motor 1 is installed in the groove. A rudder propeller input seal 8 is provided between the output shaft of the permanent magnet motor 1 and the bottom of the groove; a liquid level sensor 18 and a well box oil suction pipe 20 connected to the oil pump 19 are provided in the groove; the permanent magnet motor 1 is also equipped with a pneumatic brake device 17. When the liquid level sensor 18 detects the oil level, that is, the rudder propeller input seal 8 fails, the oil pump 19 starts and emits an audible and visual alarm when the liquid level is at a certain height, and the oil is pumped out through the well box oil suction pipe 20 to prevent the lubricating oil from entering the permanent magnet motor 1 and causing certain damage to the permanent magnet motor 1. When the permanent magnet motor 1 stops, the pneumatic brake device 17 is closed to prevent the water flow from driving the propeller 6 to rotate, thereby improving the reliability of the product while ensuring integration.

[0024] In this embodiment, a screw pump 15 (oil-pressing screw, equivalent to a pump) is provided in the well box assembly 2. The screw pump 15 is mounted on the elastic coupling 9. After the elastic coupling 9 rotates, the screw pump 15 will generate pressure to press the lubricating oil of the lower gear box assembly 4 into the well box assembly 2 through the inner hole of the elastic coupling 9. The lubricating oil in the well box assembly 2 drops into the lower gear box assembly 4 by gravity, forming an up and down circulation. The casing of the lower gear box assembly 4 is in contact with seawater. During the circulation process, heat is exchanged between the casing of the lower gear box assembly 4 and the seawater to achieve cooling of the lubricating oil.

[0025] In this embodiment, the lower gearbox bevel gear shaft 10 is meshed with the sleeve and the spiral bevel gear on the propeller shaft 11 to transmit torque. The propeller shaft 11 and the propeller 6 have a taper without a key sleeve. The overall structure is simple and the transmission efficiency is high. All installation work is completed at the rudder propeller manufacturer, and there is no need to align the shaft system when installing at the shipyard.

[0026] In the present embodiment, the lower gearbox assembly 4 also includes a propeller shaft bearing seat 16 for mounting the propeller shaft 11, and a temperature sensor 21 is provided in the propeller shaft bearing seat 16; the present embodiment is provided with two propeller shaft bearing seats 16, and in actual use, usually one of them (the left side in the figure) is integrated with the housing of the lower gearbox assembly 4; the temperature sensor 21 can be used to monitor the temperature of the propeller shaft 11 bearing in real time, and determine whether the bearing is abnormal based on the monitored data, thereby ensuring the reliability of the system.

[0027] In this embodiment, a stern seal assembly 5 is provided between the propeller shaft 11 and the housing of the lower gear box assembly 4. The stern seal assembly 5 includes a shell and a stern shaft lip seal. The shell is a split type, and the stern shaft lip seal is a split type seal. The lip seal at any position can be replaced without removing the propeller shaft 11 or the propeller 6.

[0028] In this embodiment, a motor maintenance platform 22 is also provided, which is arranged beside the propeller body (i.e., the rudder propeller); the motor maintenance platform 22 contains a hydraulic jack device. The jack is folded up when not in use. Once the motor fails, the motor can be hoisted onto the maintenance platform for maintenance on board.

[0029] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Without departing from the scope and technical principles of the described embodiments, many modifications and changes are obvious to those of ordinary skill in the art, and these modifications and changes should also be regarded as the scope of protection of the present invention.

Claims

1. An integrated electric propeller propeller, characterized in that: The invention comprises a permanent magnet motor (1), a well box assembly (2), a steering column (3) and a lower gear box assembly (4) which are connected in sequence; the permanent magnet motor (1) is mounted on the well box assembly (2); the output shaft of the permanent magnet motor (1) is connected to a lower gear box bevel gear shaft (10) in the lower gear box assembly (4) via an elastic coupling (9); the elastic coupling (9) is arranged in the well box assembly (2) and passes through the steering column (3); the lower gear box bevel gear shaft (10) is drivingly connected to a propeller shaft (11) of a propeller (6).

2. The integrated electric propeller propeller according to claim 1, characterized in that: The permanent magnet motor (1) is installed in a groove at the top of the well box assembly (2), and a propeller input seal (8) is provided between the output shaft of the permanent magnet motor (1) and the bottom of the groove.

3. The integrated electric propeller propeller according to claim 2, characterized in that: A liquid level sensor (18) and a well box oil suction pipe (20) connected to an oil pump (19) are provided in the groove; the permanent magnet motor (1) is also provided with a pneumatic brake device (17).

4. The integrated electric propeller propeller according to claim 1, characterized in that: The bottom of the steering column (3) is connected to the housing of the lower gearbox assembly (4), and the top is connected to the cone (14) of the well box assembly (2); the cone is connected to the electric steering device (12) via a slewing bearing (13); the electric steering device (12) drives the slewing bearing (13), the cone (14), the steering column (3), the lower gearbox assembly (4) and the propeller (4) to rotate 360 ​​degrees around the center of the steering column (3).

5. The integrated electric propeller propeller according to claim 1, characterized in that: A screw pump (15) is provided in the well box assembly (2). The screw pump (15) is mounted on the elastic coupling (9) and presses the lubricating oil of the lower gear box assembly (4) into the well box assembly (2) through the inner hole of the elastic coupling (9). The lubricating oil in the well box assembly (2) descends into the lower gear box assembly (4) by gravity, forming an up and down circulation.

6. The integrated electric propeller propeller according to claim 5, characterized in that: The included angle between the propeller shaft (11) and the lower gear box bevel gear shaft (10) is 98°.

7. The integrated electric propeller propeller according to claim 1, characterized in that: The bevel gear shaft (10) of the lower gearbox meshes with the sleeve and the spiral bevel gear on the propeller shaft (11) to transmit torque, and the propeller shaft (11) and the propeller (6) have a taper without a key sleeve.

8. The integrated electric propeller propeller according to claim 1, characterized in that: The lower gearbox assembly (4) further comprises a propeller shaft bearing seat (16) for mounting the propeller shaft (11), wherein a temperature sensor (21) is provided in the propeller shaft bearing seat (16).

9. The integrated electric propeller propeller according to claim 1, characterized in that: A stern seal assembly (5) is provided between the propeller shaft (11) and the housing of the lower gearbox assembly (4), the stern seal assembly (5) comprising a housing and a stern shaft lip seal, the housing being of a split type, and the stern shaft lip seal being of a split type.

10. The integrated electric propeller propeller according to claim 1, characterized in that: The propeller is also equipped with a motor maintenance platform (22), and the motor maintenance platform (22) contains a hydraulic jack device.

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