Gearbox transmission device integrated with vibration isolation for a ship and an electric ship

Abstract

The utility model belongs to ship propulsion technical field, concretely relates to a gear box transmission device of ship and electric ship integrated vibration isolation, include: motor, gear box, vibration damper and frequency converter, the output of motor is directly connected with the input of gear box, the output shaft of gear box is connected with the hub flange through the expansion sleeve, is used for directly connecting the propeller drive shaft, the output shaft of gear box is supported in the box through the thrust bearing, the box of gear box is connected with the hull through vibration damper, frequency converter is installed on gear box through support, and the utility model discloses output end structure is adopted to the motor, has shortened the length of transmission system, has utilized the longitudinal space in the ship power cabin, has improved space utilization, thereby makes electric transmission system can adapt to shorter small ship type, or satisfies some to the crew cabin space size requirement high ship type, frequency converter integrated installation simultaneously, makes full use of space.

Description

Technical Field

[0001] This utility model belongs to the field of marine propulsion technology, specifically relating to a gearbox transmission device for integrated vibration isolation in ships and electric vessels. Background Technology

[0002] Traditional mechanical propulsion systems typically use diesel engines, gas turbines, or steam turbines as power sources. These engines are inefficient under partial load, leading to energy waste. Mechanical transmission systems (such as gearboxes and drive shafts) also experience energy losses during power transmission, further reducing overall efficiency.

[0003] Traditional mechanical propulsion systems have poor speed regulation performance, making it difficult to respond quickly to the navigation needs of a ship, especially during low-speed navigation or frequent speed changes. Mechanical propulsion systems typically cannot reverse directly, requiring complex mechanical devices or additional reversing gearboxes.

[0004] Traditional propulsion systems require the installation of large diesel engines, which occupy a lot of engine room space and limit the internal layout of ships.

[0005] Traditional electric boat propulsion systems typically employ a structure consisting of a propulsion motor, thrust bearing, coupling, shafting, and propeller. This drive shaft runs the entire length of the hull, increasing its length and reducing the space available for the crew compartment. Marine propellers operate at low speeds, and the low-speed, high-torque motors are relatively large, heavy, and expensive. Utility Model Content

[0006] Purpose of the utility model: To provide a gearbox propulsion device for electric boats that can reverse direction and decelerate. The device has a compact structure, occupies little space, is easy to maintain, and has low cost. It can realize the reversible travel and deceleration of electric boats, thus solving the problems mentioned above.

[0007] Technical solution: A gearbox transmission device for integrated vibration isolation in ships and electric boats, comprising: a motor, a gearbox, a vibration isolator, and a frequency converter;

[0008] The output end of the motor is directly connected to the input end of the gearbox;

[0009] The output shaft of the gearbox is connected to a hub flange via a shrink sleeve, which is used to directly connect to the propeller drive shaft.

[0010] The output shaft of the gearbox is supported inside the gearbox by a thrust bearing;

[0011] The gearbox housing is connected to the hull via the vibration isolator;

[0012] The frequency converter is mounted on the gearbox via a bracket.

[0013] In a further embodiment, the motor is an external rotor permanent magnet motor, and its rotor output shaft is directly connected to the gearbox via splines and a flange.

[0014] In a further embodiment, the gearbox is provided with an input shaft, an intermediate shaft, and an output shaft, and a gear transmission mechanism with a fixed transmission ratio is formed by the input shaft gear, the intermediate shaft input gear, the intermediate shaft output gear, and the output shaft gear.

[0015] In a further embodiment, the vibration isolator is an integrated pair of radial rubber vibration isolators, symmetrically arranged on both sides of the gearbox.

[0016] In a further embodiment, the thrust roller bearing is a thrust tapered roller bearing.

[0017] In a further embodiment, the frequency converter employs vector control technology, enabling it to control the motor to achieve stepless speed regulation and forward / reverse rotation; furthermore, when the ship decelerates or stops, it can control the motor to operate as a generator to charge the battery.

[0018] A ship, characterized in that the ship is equipped with the aforementioned electric ship integrated vibration isolation gearbox drive device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Compact structure and small footprint: This utility model adopts a motor and output end structure, shortening the length of the transmission system and utilizing the longitudinal space inside the ship's power compartment, thus improving space utilization. This allows the electric drive system to adapt to shorter, smaller ship types, or to meet the requirements of certain ship types with high requirements for passenger compartment space. The frequency converter is integrated and installed, making full use of space.

[0021] 2. Vibration isolation and noise reduction, eliminating the need for couplings: The propulsion device uses integrated radial rubber vibration isolators connected to the hull, which can adapt to the alignment deviation when the device's output shaft is connected to the propeller drive shaft to a certain extent, eliminating the need for a coupling to connect the propeller drive shaft.

[0022] 3. Thrust bearing, direct connection to propeller: The output shaft of the gearbox of this utility model uses a thrust roller bearing to support rotation, eliminating the need for an additional bearing housing to bear the thrust.

[0023] 4. Reversible travel and deceleration: This utility model uses a frequency converter to control the motor, which enables the electric boat to travel reversibly and decelerate.

[0024] 5. Simple installation and convenient maintenance: The gearbox output shaft is directly connected to the propeller drive shaft flange after being connected to the hub flange via a shrink sleeve, making installation and disassembly convenient and facilitating maintenance.

[0025] 6. Lightweight and low-requirement motor: This utility model adopts synchronous belt pulley transmission, which can customize the transmission ratio, adapt to more motors, and select a motor with high speed and low torque for the same power, which is lighter and cheaper. Attached Figure Description

[0026] Figure 1 This is the front view of this utility model.

[0027] Figure 2 This is the right view of this utility model.

[0028] Figure 3 This is a top view of the present invention.

[0029] Figure 4 This is a cross-sectional view of the present invention.

[0030] Reference numerals in the attached diagram: 1. Permanent magnet motor; 2. Frequency converter; 3. Gearbox; 4. Rubber thrust vibration isolator; 5. Shaft hub flange; 6. Expansion sleeve; 7. Input shaft gear; 8. Intermediate shaft input gear; 9. Intermediate shaft output gear; 10. Output shaft gear; 11. Thrust roller bearing. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical 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 based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] A gearbox transmission device for integrated vibration isolation in ships and electric boats includes: a motor 1, a gearbox 3, a vibration isolator 4, and a frequency converter 2.

[0035] In one embodiment, such as Figures 1 to 4 As shown, motor 1 is on the same side as the output end. Motor 1 is directly connected to gearbox 3. The output shaft of gearbox 3 is connected to hub flange 5 by shrink sleeve 6. Hub flange 5 is connected to propeller drive shaft. The output shaft inside gearbox 3 is supported by thrust tapered roller bearing for rotation. The two sides of gearbox 3 are connected by integrated radial rubber vibration isolators. The frequency converter of motor 1 is integrated and installed on the other side of the output end of gearbox 3 through bracket.

[0036] In one embodiment, such as Figures 1 to 4 As shown, the permanent magnet motor 1 adopts an external rotor structure, and the rotor output shaft is directly connected to the gearbox 3 via splines and flanges.

[0037] In one embodiment, such as Figures 1 to 4 As shown, the gearbox 3 consists of three fixed shafts and two sets of gears, with an input shaft, an intermediate shaft, and an output shaft distributed longitudinally. The input shaft is matched with the gear at one end of the intermediate shaft, and the gear at the other end of the intermediate shaft is matched with the output shaft gear 10.

[0038] In one embodiment, such as Figures 1 to 4 As shown, the gearbox 3 has a fixed transmission ratio, which can reduce the speed and increase the torque of the motor 1.

[0039] In one embodiment, such as Figures 1 to 4 As shown, the motor 1 is a permanent magnet motor 1. During deceleration or when the boat is stopped, the propeller rotates due to the impact of the water flow, and the motor 1 can generate electricity to charge the battery.

[0040] In one embodiment, such as Figures 1 to 4 As shown, the frequency converter 2 adopts vector control technology, which can realize stepless speed regulation and forward and reverse rotation control of motor 1.

[0041] In one embodiment, such as Figures 1 to 4As shown, the propulsion device uses integrated radial rubber vibration isolators connected to the hull, which can withstand extremely high thrust while reducing the transmission of high-frequency vibrations to the hull and achieving a certain degree of noise reduction. It can also accommodate some alignment deviations when connecting the device's output shaft and the propeller drive shaft, eliminating the need for a coupling connecting the propeller drive shaft.

[0042] In one embodiment, such as Figures 1 to 4 As shown, the output shaft of the gearbox 3 is supported by a thrust roller bearing 11 for rotation, eliminating the need for an additional bearing housing to bear the thrust.

[0043] Working Principle: The permanent magnet motor 1 is directly connected to the gearbox 3 via splines and a flange. An integrated rubber thrust isolator 4 is fixed on each side of the gearbox 3. The rubber isolators 4 are directly connected to the hull. The output end of the gearbox 3 is fixedly mounted to the hub flange 5 via a shrink sleeve 6. The hub flange 4 is directly connected to the propeller drive shaft. The frequency converter 2 is mounted on the other side of the output end of the gearbox 3 via multiple brackets. The motor 1 transmits power to gear 7, then to gear 8, then to gear 9, and finally to gear 10. Gear 10 transmits power to the propeller shaft via the output shaft. The rotating propeller experiences thrust, which is applied to the gearbox output shaft. The output shaft transmits the thrust to the thrust roller bearing 11. The thrust roller bearing 11 transmits the thrust to the gearbox housing, the gearbox 3 transmits the thrust to the rubber thrust isolators 4 on both sides, and finally, the thrust is transmitted to the hull.

[0044] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A gearbox transmission device for integrated vibration isolation in electric ships, characterized in that, include: Motor (1), gearbox (3), vibration isolator (4) and frequency converter (2); The output end of the motor (1) is directly connected to the input end of the gearbox (3); The output shaft of the gearbox (3) is connected to a hub flange (5) via a shrink sleeve (6) for direct connection to the propeller drive shaft; The output shaft of the gearbox (3) is supported in the gearbox body by a thrust roller bearing (11); The gearbox (3) housing is connected to the hull via the vibration isolator (4); The frequency converter (2) is mounted on the gearbox (3) via a bracket.

2. The gearbox transmission device for integrated vibration isolation in electric ships according to claim 1, characterized in that, The motor (1) is an external rotor permanent magnet motor, and its rotor output shaft is directly connected to the gearbox (3) through splines and flanges.

3. The gearbox transmission device for integrated vibration isolation in electric ships according to claim 1, characterized in that, The gearbox (3) is equipped with an input shaft, an intermediate shaft and an output shaft, and forms a gear transmission mechanism with a fixed transmission ratio through the input shaft gear (7), the intermediate shaft input gear (8), the intermediate shaft output gear (9) and the output shaft gear (10).

4. The gearbox transmission device for integrated vibration isolation in electric ships according to claim 1, characterized in that, The vibration isolator (4) is an integrated pair of radial rubber vibration isolators, symmetrically arranged on both sides of the gearbox (3).

5. The gearbox transmission device for integrated vibration isolation in electric ships according to claim 1, characterized in that, The thrust roller bearing (11) is a thrust tapered roller bearing.

6. The gearbox transmission device for integrated vibration isolation in electric ships according to claim 1, characterized in that, The inverter (2) adopts vector control technology, which can control the motor (1) to achieve stepless speed regulation and forward and reverse rotation; and when the ship decelerates or stops, it can control the motor (1) to run as a generator to charge the battery.

7. A ship, characterized in that, The vessel is equipped with a gearbox transmission device for integrated vibration isolation of electric ships as described in any one of claims 1 to 6.

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