Integrated stern propulsion device based on magnetic transmission

Abstract

The application provides a stern integrated propelling device based on magnetic transmission, and relates to the technical field of ship propelling systems, which comprises a shell, a main shaft, a supporting structure and a transmission structure. The shell has a containing cavity, and is used for connecting a ship body; the main shaft penetrates through the shell and is at least partially arranged in the containing cavity, one end of the main shaft is used for connecting a propelling motor inside the ship body, and the other end is used for connecting a propeller outside the ship body; the supporting structure is arranged in the containing cavity and can support the main shaft; and the transmission structure is arranged in the containing cavity and can adopt a non-contact transmission mode to transmit the thrust of the main shaft to the shell. The device in the application can reduce the span of the shafting where the main shaft is arranged, and can reduce the cabin space occupied by the whole device at the stern of the ship. Moreover, the transmission structure adopts a non-contact mode to transmit the thrust to the ship body, can relieve vibration, and can effectively reduce the noise generated by the ship body during navigation.

Description

Technical Field

[0001] This invention relates to the field of marine propulsion system technology, and in particular to a stern-integrated propulsion device based on magnetic drive. Background Technology

[0002] A ship's propulsion system typically includes a propulsion motor, a drive shaft, and a propeller. One end of the drive shaft is connected to the propulsion motor, and the other end is connected to the propeller. The propulsion motor drives the drive shaft to rotate, which in turn drives the propeller to rotate, thus enabling the ship to move forward in the water.

[0003] To ensure that the driveshaft can effectively transmit thrust to the hull, a thrust bearing for transmitting thrust and a radial support bearing for support are typically installed between the driveshaft and the hull. However, in related technologies, most marine propulsion systems install the thrust bearing and radial support bearing separately within the hull. This results in an excessively long shaft system span, occupying too much space within the hull. Furthermore, when the thrust bearing transmits thrust to the hull, the unsteady forces of the propeller cause severe vibrations in the hull, leading to significant noise. Summary of the Invention

[0004] This invention provides a stern-integrated propulsion device based on magnetic drive, which solves the problem of unreasonable structural design in existing ship propulsion systems, resulting in excessively long shaft distribution spans. By integrating the various structures in the propulsion device, the overall cabin space occupied by the device can be effectively reduced. Moreover, the non-contact transmission method can alleviate vibrations generated by the hull and reduce noise.

[0005] This invention provides a stern-integrated propulsion device based on magnetic drive, comprising:

[0006] A hull having a receiving cavity, the hull being used to connect to the ship's hull;

[0007] A main shaft, which extends through the housing and is at least partially disposed in the receiving cavity, has one end for connecting to a propulsion motor inside the hull and the other end for connecting to a propeller outside the hull.

[0008] A support structure is disposed in the receiving cavity and is capable of supporting the main shaft;

[0009] A transmission structure is disposed in the receiving cavity, and the transmission structure is capable of transmitting the thrust of the main shaft to the housing in a non-contact transmission manner.

[0010] According to a stern-integrated propulsion device based on magnetic drive according to the present invention, the support structure includes: a bushing, a radial support bearing, and a first support portion. The bushing is sleeved on the outer periphery of the main shaft, the radial support bearing surrounds the outer periphery of the bushing, and the radial support bearing is fixedly connected to the housing via the first support portion.

[0011] According to a stern-integrated propulsion device based on magnetic drive according to the present invention, the transmission structure includes: a thrust mover magnet assembly, a thrust stator magnet assembly, and a second support portion. The thrust mover magnet assembly surrounds the outer periphery of the main shaft, and the thrust stator magnet assembly surrounds and is spaced apart from the outer periphery of the thrust mover magnet assembly. The thrust stator magnet assembly is fixedly connected to the housing via the second support portion.

[0012] According to a stern-integrated propulsion device based on magnetic drive according to the present invention, the number of the transmission structures is two, and the two transmission structures are respectively arranged on both sides of the support structure in the axial direction of the main shaft.

[0013] According to a magnetic drive-based stern-integrated propulsion device of the present invention, a sealing structure is further included, which is disposed around the outer periphery of the main shaft and connected to the side of the housing near the propulsion motor, and the sealing structure is capable of sealing with the main shaft.

[0014] According to a stern-integrated propulsion device based on magnetic drive of the present invention, the sealing structure includes: a connecting part, a dynamic sealing ring, and a static sealing ring. The connecting part surrounds the outer periphery of the main shaft and is connected to the side of the housing facing the propulsion motor. A sealing space is formed between the connecting part and the main shaft. The dynamic sealing ring and the static sealing ring are both disposed within the sealing space. The dynamic sealing ring is sleeved on the outer periphery of the main shaft. The static sealing ring surrounds the outer periphery of the main shaft and is fixedly connected to the connecting part. The static sealing ring abuts against the dynamic sealing ring.

[0015] According to a stern-integrated propulsion device based on magnetic drive of the present invention, the sealing structure further includes an elastic element and a sealing mounting seat. The connecting part is provided with a cavity for installing the elastic element. The elastic element is disposed in the cavity, and one end of the elastic element is connected to the connecting part and the other end is connected to the sealing mounting seat. The static sealing ring is disposed on the sealing mounting seat.

[0016] According to a stern-integrated propulsion device based on magnetic drive of the present invention, the sealing structure further includes a clamping ring, a boss is provided on the side of the sealing mounting seat facing the dynamic sealing ring, the clamping ring is arranged around the outer periphery of the boss in the radial direction of the main shaft, and the static sealing ring is engaged between the boss and the clamping ring.

[0017] According to a stern-integrated propulsion device based on magnetic drive of the present invention, the clamping ring has a clamping surface formed on the inner wall of the boss, the clamping surface extends inward at an angle toward the dynamic sealing ring, and the static sealing ring abuts against the clamping surface.

[0018] According to a magnetic drive-based stern-integrated propulsion device of the present invention, an elastic anti-fouling component is further included. The elastic anti-fouling component is disposed around the outer periphery of the main shaft and connected to the side of the housing facing the propeller. The elastic anti-fouling component has a free end extending toward the main shaft and the free end is inclined toward the side of the propeller. An anti-fouling flange is disposed around the outer wall of the main shaft. The anti-fouling flange is close to the elastic anti-fouling component and located on the side of the elastic anti-fouling component facing the propeller.

[0019] The present invention provides a stern-integrated propulsion device based on magnetic drive, comprising a housing, a main shaft, a support structure, and a transmission structure. The housing is connected to the hull, and the support and transmission structures are integrated within a cavity of the housing. The support and transmission structures respectively support and transmit thrust to the main shaft passing through the cavity, allowing the thrust of the main shaft to be effectively transmitted to the hull. This arrangement reduces the span of the shaft system containing the main shaft, thereby reducing the cabin space occupied by the entire device in the stern of the ship. Furthermore, the transmission structure transmits thrust to the hull in a non-contact manner, which can mitigate vibration and effectively reduce noise generated by the hull during navigation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a stern-integrated propulsion device based on magnetic drive according to one embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Enlarged view of section A;

[0023] Figure 3 yes Figure 1 Enlarged view of section B;

[0024] Figure 4 This is a schematic diagram illustrating the antifouling effect of a ship's stern propulsion device in water, as described in existing technologies.

[0025] Figure 5 This is a schematic diagram illustrating the antifouling effect of a stern-integrated propulsion device based on magnetic drive in water, according to one embodiment of the present invention.

[0026] Figure label:

[0027] 1. Housing; 2. Main shaft; 21. Anti-fouling flange; 3. Support structure; 31. Bushing; 32. Radial support bearing; 33. First support part; 4. Transmission structure; 41. Thrust mover magnet assembly; 42. Thrust stator magnet assembly; 43. Second support part; 5. Hull; 6. Propulsion motor; 7. Thruster; 8. Sealing structure; 81. Connecting part; 811. Sealing joint seat; 812. Sealing compensation seat; 82. Dynamic sealing ring; 83. Static sealing ring; 84. Front retaining ring; 85. Rear retaining ring; 86. Positioning key; 87. Elastic element; 88. Sealing mounting seat; 89. Compression ring; 9. Elastic anti-fouling element. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] According to one embodiment of the present invention, a stern-integrated propulsion device based on magnetic drive is provided. The device includes a housing, a main shaft, a support structure, and a transmission structure. The support structure and the transmission structure are both disposed in the receiving cavity of the housing, and the main shaft passes through the receiving cavity. This device can reduce the span of the shaft system where the main shaft is located, thereby reducing the cabin space occupied by the entire device in the stern of the ship. Moreover, the transmission structure transmits thrust to the hull in a non-contact manner, which can alleviate vibration and reduce noise.

[0030] The following combination Figures 1 to 3 The stern-integrated propulsion device based on magnetic drive in this embodiment is further described.

[0031] Specifically, such as Figure 1 As shown, the stern-integrated propulsion device based on magnetic drive in this embodiment includes: a housing 1, a main shaft 2, a support structure 3, and a transmission structure 4.

[0032] The hull 1 has a receiving cavity and is used to connect to the hull 5. It can be understood that the stern-integrated propulsion device is located at the bottom of the ship's hull 5, the hull 1 can be constructed of metal materials, and the hull 1 can be fixedly connected to the hull 5 by means of fasteners such as bolts.

[0033] In this embodiment, a receiving cavity is formed inside the housing 1, which can accommodate part of the structure in the propulsion device.

[0034] The main shaft 2 passes through the housing 1 and is at least partially disposed in the receiving cavity. One end of the main shaft 2 is used to connect to the propulsion motor 6 inside the hull 5, and the other end is used to connect to the propeller 7 outside the hull 5.

[0035] It is understood that the housing 1 has an installation channel that extends through the receiving cavity. After the housing 1 is fixedly connected to the hull 5, one side opening of the installation channel is located inside the hull 5, and the other side opening is located outside the hull 5. The main shaft 2 can be inserted into the installation channel. Furthermore, the end of the main shaft 2 that extends through the housing 1 and is located inside the hull 5 is connected to a propulsion motor 6, and the end of the main shaft 2 that extends through the housing 1 and is located outside the hull 5 is connected to a thruster 7.

[0036] For example, the main shaft 2 has a flange at one end inside the hull 5, through which the main shaft 2 can be connected to the output shaft of the propulsion motor 6 via bolts or other means. The propeller 7 can be a propeller, which generates thrust when rotating in water.

[0037] The support structure 3 is disposed in the receiving cavity and can support the main shaft 2. It can be understood that the main shaft 2 will be affected by the thruster 7 during rotation and will generate radial vibration. In order to keep the position of the rotation axis of the main shaft 2 stable, the support structure 3 can support the main shaft 2 to prevent the position of the main shaft 2 from shifting.

[0038] The transmission structure 4 is disposed in the receiving cavity, and the transmission structure 4 can transmit the thrust of the main shaft 2 to the housing 1 in a non-contact transmission manner. It is understood that when the propeller 7 operates in water, it generates axial thrust on the main shaft 2, which needs to be converted into a driving force for the ship's forward movement. In this embodiment, the transmission structure 4 can receive the axial thrust transmitted by the main shaft 2 during rotation, transmit this thrust to the housing 1, and ultimately transmit the thrust to the hull 5, thereby propelling the ship forward.

[0039] In this embodiment, such as Figure 1 As shown, the support structure 3 includes: a bushing 31, a radial support bearing 32, and a first support portion 33. The bushing 31 is sleeved on the outer periphery of the main shaft 2, the radial support bearing 32 is arranged around the outer periphery of the bushing 31, and the radial support bearing 32 is fixedly connected to the housing 1 via the first support portion 33.

[0040] For example, the bushing 31 is annular and is fixedly fitted around the outer periphery of the main shaft 2. The radial support bearing 32 is also annular and surrounds the outer periphery of the bushing 31. That is, the radial support bearing 32 corresponds to the bushing 31. One end of the first support portion 33 is fixedly connected to the housing 1, and the other end is provided with the radial support bearing 32, thereby fixing the radial support bearing 32. When the main shaft 2 rotates, a friction pair with relative rotation can be formed between the radial support bearing 32 and the bushing 31.

[0041] In actual use, when the hull 5 is placed in water, water can enter the accommodating cavity of the shell 1. At this time, the radial support bearing 32 and the bushing 31 are completely submerged in water. During the process of the propulsion motor 6 driving the main shaft 2 to rotate, the water in the accommodating cavity can lubricate the radial support bearing 32 and the bushing 31 and can carry away the heat generated by the rotational friction between them, which can achieve the cooling effect and thus improve the service life.

[0042] Optionally, the ratio between the width of the radial support bearing 32 in the axial direction of the main shaft 2 and the diameter of the main shaft 2 is greater than or equal to 3. In this case, a sufficiently wide bearing area can be formed between the radial support bearing 32 and the bushing 31, which can reduce the average bearing pressure of the bearing, effectively reduce the wear of the bearing, and thus improve its service life.

[0043] In a specific embodiment, such as Figure 1 As shown, the first support portion 33 includes a first axially extending ring and a first radially extending plate. The first axially extending ring is sleeved on the outer periphery of the main shaft 2. The radial support bearing 32 is disposed on the inner wall surface of the first axially extending ring facing the main shaft 2. One end of the first radially extending plate is fixedly connected to the inner wall of the receiving cavity, and the other end extends toward the main shaft 2 and is fixedly connected to the first axially extending ring. Thus, the radial support bearing 32 can be effectively fixed by means of the first axially extending ring and the first radially extending plate.

[0044] Optionally, to ensure force balance and prevent damage to the first support portion 33, a first radial extension plate can be connected to the middle position of the first axial extension ring in the axial direction of the main shaft 2. In this case, the cross-section of the first support portion 33 is formed into a roughly T-shaped structure, and when the radial support bearing 32 supports the bushing 31 during rotation, the force transmitted from the radial support bearing 32 to the first support portion 33 can remain relatively balanced.

[0045] In this embodiment, such as Figure 1As shown, the transmission structure 4 includes: a thrust mover magnet assembly 41, a thrust stator magnet assembly 42, and a second support portion 43. The thrust mover magnet assembly 41 surrounds the outer periphery of the main shaft 2, and the thrust stator magnet assembly 42 surrounds and is spaced apart from the outer periphery of the thrust mover magnet assembly 41. The thrust stator magnet assembly 42 is fixedly connected to the main shaft 2 via the second support portion 43.

[0046] Specifically, one end of the second support 43 is fixedly connected to the main shaft 2, and the other end extends outward along the radial direction of the main shaft 2. The thrust mover magnet assembly 41 is annular, surrounding the outer circumference of the main shaft 2 and fixedly connected to the second support 43. The thrust stator magnet assembly 42 is arranged around the outer circumference of the thrust mover magnet assembly 41. That is, the positions of the thrust stator magnet assembly 42 and the thrust mover magnet assembly 41 correspond to each other, and there is a gap between the thrust stator magnet assembly 42 and the thrust mover magnet assembly 41. When the main shaft 2 rotates, the thrust mover magnet assembly 41 can rotate relative to the thrust stator magnet assembly 42, and the thrust mover magnet assembly 41 can transmit the axial thrust of the main shaft 2 to the thrust stator magnet assembly 42 through magnetic force.

[0047] In actual use, when the hull 5 is placed in the water, the propulsion motor 6 drives the thruster 7 to rotate via the main shaft 2. During the rotation of the thruster 7, the thruster 7 can transmit forward thrust to the main shaft 2. The main shaft 2 will move forward and generate displacement relative to the hull 1. The thrust mover magnet assembly 41 and the thrust stator magnet assembly 42 will also generate relative displacement. Since there is a magnetic attraction between the two magnets, under the action of this magnetic attraction, the thrust stator magnet assembly 42 will move forward with the thrust mover magnet assembly 41, thereby receiving the thrust from the main shaft 2. Finally, the thrust of the main shaft 2 is transmitted to the hull 5 via the hull 1, enabling the ship to move forward.

[0048] In other words, the thrust stator magnet assembly 42 can receive the thrust from the thrust mover magnet assembly 41 by means of magnetic attraction, and thereby transmit the thrust generated by the propeller 7 to the ship.

[0049] In this embodiment, the thruster will generate large vibrations when it rotates, and the main shaft will also be affected by the vibrations. During the thrust transmission process, since there is a gap between the thrust stator magnet assembly 42 and the thrust mover magnet assembly 41, no direct contact is generated, and non-contact transmission is realized. This can effectively reduce the vibration transmitted from the main shaft 2 to the hull 5 and reduce noise.

[0050] In a specific embodiment, such as Figure 1As shown, the second support portion 43 includes a second axially extending ring and a second radially extending plate. The second axially extending ring surrounds the outer periphery of the main shaft 2. The thrust mover magnet assembly 41 is disposed on the side of the second axially extending ring opposite to the main shaft 2. One end of the second radially extending plate is fixedly connected to the main shaft 2, and the other end is connected to the second axially extending ring, thereby fixing the thrust mover magnet assembly 41. Correspondingly, the thrust stator magnet assembly 42 can be directly embedded into the inner wall of the receiving cavity.

[0051] In one embodiment, to ensure force balance and prevent damage to the second support portion 43, a second radial extension plate can be connected to the middle position of the second axial extension ring in the axial direction of the main shaft 2. In this case, the cross-section of the second support portion 43 can be formed into a generally T-shaped structure.

[0052] In another embodiment, in order to improve the thrust transmission effect and ensure force balance, there are two transmission structures 4, which are respectively arranged on both sides of the support structure 3 in the axial direction of the main shaft 2.

[0053] Furthermore, in order to make the entire device more compact and reduce the cabin space occupied by the entire device in the hull 5, the first axial extension ring and the second axial extension ring can overlap each other in the axial direction of the main shaft 2.

[0054] Correspondingly, when transmission structures 4 are respectively provided on both sides of the support structure 3, in the axial direction of the main shaft 2, the second axial extension rings in the transmission structures 4 on both sides can overlap with the two sides of the first axial extension ring respectively. Moreover, in order to further improve the compactness of the entire device, the second radial extension plate can be connected to the second axial extension ring at a position slightly away from the support structure 3, so that the second axial extension ring can have a larger overlap area with the first axial extension ring, thereby improving the compactness.

[0055] In this embodiment, to prevent water in the containment cavity from entering the interior of the hull 5, the stern-integrated propulsion device also includes a sealing structure 8. The sealing structure 8 is arranged around the outer periphery of the main shaft 2 and connected to the side of the housing 1 near the propulsion motor. The sealing structure 8 can achieve a seal between itself and the main shaft 2.

[0056] Specifically, such as Figure 1 and Figure 2As shown, the sealing structure 8 includes: a connecting part 81, a dynamic sealing ring 82, and a static sealing ring 83. The connecting part 81 surrounds the outer periphery of the main shaft 2 and is connected to the side of the housing 1 facing the propulsion motor. A sealing space is formed between the connecting part 81 and the main shaft 2. The dynamic sealing ring 82 and the static sealing ring 83 are both disposed in the sealing space. The dynamic sealing ring 82 is sleeved on the outer periphery of the main shaft 2, and the static sealing ring 83 is disposed around the outer periphery of the main shaft 2 and is fixedly connected to the connecting part 81. The static sealing ring 83 abuts against the dynamic sealing ring 82.

[0057] For example, the dynamic sealing ring 82 can be fixedly arranged around the outer periphery of the spindle 2.

[0058] As one implementation method, such as Figure 2 As shown, the sealing structure 8 further includes a front retaining ring 84, a rear retaining ring 85, and a positioning key 86. In the axial direction of the main shaft 2, the front retaining ring 84 and the rear retaining ring 85 are respectively disposed on both sides of the dynamic sealing ring 82, and the front retaining ring 84 and the rear retaining ring 85 can be respectively engaged with the outer periphery of the main shaft 2 through a retaining groove provided on the main shaft 2. A keyway is also provided on the main shaft 2 between the front retaining ring 84 and the rear retaining ring 85, and the positioning key 86 can be engaged in the keyway, allowing the dynamic sealing ring 82 to be fixed to the main shaft 2 by the positioning key 85. Thus, the front retaining ring 84 and the rear retaining ring 85 can limit the forward and backward movement of the dynamic sealing ring 82, while the positioning key 86 can limit the rotation of the dynamic sealing ring 82.

[0059] In actual use, when the hull 5 is placed in water, water will enter the receiving cavity of the shell 1 and reach the sealed space. During the rotation of the main shaft 2, the dynamic sealing ring 82 rotates synchronously with the main shaft 2, while the static sealing ring 83 remains stationary. The dynamic sealing ring 82 can rotate relative to the static sealing ring 83, and the dynamic sealing ring 82 and the static sealing ring 83 can form a dynamic sealing pair through the dynamic pressure effect, which can prevent water in the sealed space from entering the interior of the hull 5, thus achieving the function of mechanical sealing through the main shaft 2.

[0060] The main shaft 2 moves forward under the action of the pusher 7. In order to avoid the moving main shaft 2 causing the dynamic sealing ring 82 to excessively squeeze the static sealing ring 83 and affect the sealing effect between them, in this embodiment, the sealing structure 8 also includes an elastic element 87 and a sealing mounting seat 88. The connecting part 81 is provided with a cavity for installing the elastic element 87. The elastic element 87 is disposed in the cavity, and one end of the elastic element 87 is connected to the connecting part 81 and the other end is connected to the sealing mounting seat 88. The static sealing ring 83 is disposed on the sealing mounting seat 88.

[0061] For example, such as Figure 2As shown, the cavity can be constructed as a blind hole extending along the axial direction of the main shaft 2 and opening towards the dynamic sealing ring 82. An elastic element 87 is disposed in this blind hole, with one end connected to the bottom of the blind hole and the other end extending outside the blind hole and fixedly connected to the sealing mounting base 88. The static sealing ring 83 is connected to the side of the sealing mounting base 88 opposite to the elastic element 87.

[0062] In actual use, when the hull 5 is placed in the water and the propeller 7 rotates, the main shaft 2 is subjected to forward thrust. At this time, the dynamic sealing ring 82 will squeeze the static sealing ring 83 along the direction of the thrust. Due to the elastic buffering effect of the elastic element 87, the elastic element 87 is compressed, which can prevent the dynamic sealing ring 82 from excessively squeezing the static sealing ring 83 and ensure the sealing effect.

[0063] For example, the static sealing ring 83 may be constructed of an elastic material such as rubber. The elastic element 87 may be a spring.

[0064] In an optional embodiment, during the buffering movement of the sealing mounting seat 88 following the static sealing ring 83, in order to avoid excessive displacement of its position, the sealing mounting seat 88 is provided with a positioning flange extending toward the connecting part 81. In the radial direction of the main shaft 2, the positioning flange can be located between the connecting part 81 and the main shaft 2, and the positioning flange abuts against the inner wall surface of the connecting part 81.

[0065] In practical use, during the buffering movement of the sealing mounting seat 88, the positioning flange can move along the axial direction of the main shaft 2, adhering to the inner wall surface of the connecting part 81. Thus, under the adhering action of the inner wall surface of the connecting part 81, the movement of the sealing mounting seat 88 in the radial direction of the main shaft 2 can be effectively limited.

[0066] Furthermore, such as Figure 2 As shown, the sealing structure 8 also includes a clamping ring 89. The sealing mounting seat 88 has a boss on the side facing the dynamic sealing ring 82. The clamping ring 89 is arranged around the outer periphery of the boss in the radial direction of the main shaft 2. The static sealing ring 83 is engaged between the boss and the clamping ring 89.

[0067] It is understandable that the static sealing ring 83 can be fixedly mounted on the sealing mounting base 88 by means of the clamping ring 89.

[0068] In an optional embodiment, the clamping ring 89 has a clamping surface formed on the inner wall of the boss, the clamping surface extends inward at an angle toward the dynamic sealing ring 82, and the static sealing ring 83 abuts against the clamping surface.

[0069] It is understood that, in the direction from the inside of the hull 5 to the outside of the hull 5, the clamping surface gradually extends towards the main shaft 2 at an incline. When installing the static sealing ring 83, the static sealing ring 83 can be first fitted onto the boss of the sealing mounting base 88, and then the clamping ring 89 can be installed. The clamping surface of the clamping ring 89 can fully abut against the static sealing ring 83, and due to the incline of the clamping surface, the static sealing ring 83 can be prevented from detaching from the sealing mounting base 88. For example, the clamping ring 89 can be fixed to the sealing mounting base 88 by means of bolts or other structures.

[0070] In a specific embodiment, such as Figure 2 As shown, for ease of installation, the connecting part 81 may include a sealing engagement seat 811 and a sealing compensation seat 812. The sealing engagement seat 811 includes an engaging plate and a connecting plate that are connected to each other. The engaging plate extends radially along the main shaft 2 and can be connected to the housing 1 by means of bolts or other structures. The connecting plate extends axially along the main shaft 2 toward the side away from the housing 2. The sealing compensation seat 812 is connected to the end of the connecting plate away from the housing 1, for example, by means of bolts or other structures. The housing 1, the engaging plate, and the sealing compensation seat 812 at least partially form a sealing space.

[0071] The sealing mounting base 88 is connected to the sealing compensation base 812 on the inner side facing the housing 1. At the same time, the cavity for mounting the elastic element 87 is also provided on the inner side of the sealing compensation base 812 facing the housing 1.

[0072] Furthermore, to prevent large particles or bulky impurities such as silt, fishing nets, and seaweed from entering the cavity of the shell 1 and damaging its structure, in this embodiment, as follows: Figure 3 As shown, the stern-integrated propulsion device also includes an elastic anti-fouling component 9, which is arranged around the outer periphery of the main shaft 2 and connected to the side of the housing 1 facing the propeller 7. The elastic anti-fouling component 9 has a free end extending toward the main shaft 2 and the free end is inclined toward the side of the propeller 7. An anti-fouling flange 21 is arranged around the outer wall of the main shaft 2, which is close to the elastic anti-fouling component 9 and located on the side of the elastic anti-fouling component 9 facing the propeller 7.

[0073] For example, the elastic anti-fouling component 9 is annular and can be constructed from an elastic material such as rubber. The cross-section of the elastic anti-fouling component 9 can be approximately J-shaped. One end of the elastic anti-fouling component 9 is connected to the outside of the housing 1, and its tip extends near the main shaft 2 and toward the side of the pusher 7. Meanwhile, an anti-fouling flange 21 is also provided on the main shaft 2, close to the elastic anti-fouling component 9. These two components work together to achieve axial anti-fouling against large particles or large-volume impurities.

[0074] It is understandable that the elastic anti-fouling component 9 does not need to abut against the main shaft 2, and there is a small gap between it and the main shaft 2. Water can enter the housing cavity of the housing 1 through this gap, while large particles or large-volume impurities will be blocked outside the housing, thereby improving the reliability of the entire device during operation.

[0075] To more vividly demonstrate the anti-fouling effect jointly achieved by the anti-fouling flange 21 and the elastic anti-fouling component 9, the following combines... Figure 4 and Figure 5 Let me explain further.

[0076] like Figure 4 As shown, in a comparative embodiment, the outer wall of the main shaft 2 does not have an anti-fouling flange 21. During the rotation of the main shaft 2, due to the action of water flow, large particles or large-volume impurities can enter the receiving cavity of the housing 1 through the gap between the elastic anti-fouling member 9 and the main shaft 2 without any obstruction. At this time, the structure inside the receiving cavity cannot be protected.

[0077] like Figure 5 As shown, in this embodiment, the main shaft 2 is provided with an anti-fouling flange 21 near the outer wall of the elastic anti-fouling component 9. During the rotation of the main shaft 2, due to the presence of the anti-fouling flange 21, large particles or large-volume impurities cannot smoothly reach the gap between the elastic anti-fouling component 9 and the main shaft 2, let alone reach the receiving cavity of the housing 1. At this time, the structure inside the receiving cavity can be effectively protected.

[0078] Therefore, the stern-integrated propulsion device based on magnetic drive in this embodiment has the following advantages:

[0079] The stern-integrated propulsion device based on magnetic drive provided in this embodiment includes a housing, a main shaft, a support structure, and a transmission structure. The housing is connected to the hull, and the support and transmission structures are integrated within a cavity of the housing. The support and transmission structures respectively support and transmit thrust to the main shaft passing through the cavity, allowing the thrust of the main shaft to be effectively transmitted to the hull. This arrangement reduces the span of the shaft system containing the main shaft, thus reducing the cabin space occupied by the entire device at the stern of the ship. Furthermore, the transmission structure transmits thrust to the hull in a non-contact manner, mitigating vibration and effectively reducing noise generated by the hull during navigation.

[0080] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stern integrated propulsion device based on magnetic transmission, characterized by, The utility model relates to a kind of marine propulsion system, including: Housing, the housing has accommodating cavity, the housing is used to connect ship body; Main shaft, the main shaft is through the housing and is at least partially disposed in the accommodating cavity, one end of the main shaft is used to connect the propulsion motor inside ship body, the other end is used to connect the propeller outside ship body; Support structure, the support structure is disposed in the accommodating cavity, the support structure can support the main shaft; Transmission structure, the transmission structure is disposed in the accommodating cavity, the transmission structure can adopt non-contact transmission mode to transmit the thrust of the main shaft to the housing; J-shaped structure elastic antifouling piece, one end of the elastic antifouling piece is arranged around the outer periphery of the main shaft, and is connected to the side of the housing towards the propeller, the tip of the elastic antifouling piece extends towards the main shaft, and the side of the tip towards the propeller is inclined, the outer wall of the main shaft is arranged with an antifouling flange around, the antifouling flange is close to the elastic antifouling piece and is located on the side of the elastic antifouling piece towards the propeller, wherein the elastic antifouling piece and the main shaft have a gap for water entry between them; Sealing structure, the sealing structure is arranged around the outer periphery of the main shaft, and is connected to the side of the housing close to the propulsion motor, the sealing structure can realize sealing between the main shaft; Wherein, the sealing structure includes: a connecting portion, a dynamic sealing ring and a static sealing ring, the connecting portion is arranged around the outer periphery of the main shaft and is connected to the side of the housing towards the propulsion motor, a sealing space is formed between the connecting portion and the main shaft, the dynamic sealing ring and the static sealing ring are both arranged in the sealing space, the dynamic sealing ring is sleeved on the outer periphery of the main shaft, and the static sealing ring is arranged around the outer periphery of the main shaft and is fixedly connected with the connecting portion, and the static sealing ring abuts against the dynamic sealing ring.

2. The stern-integrated propulsion device based on magnetic power transmission according to claim 1, characterized by, The support structure includes: a shaft sleeve, a radial bearing bush and a first support portion, the shaft sleeve is sleeved on the outer periphery of the main shaft, the radial bearing bush is arranged around the outer periphery of the shaft sleeve, and the radial bearing bush is fixedly connected to the housing via the first support portion.

3. The stern-integrated propulsion device based on magnetic power transmission according to claim 1, characterized by, The transmission structure includes: a thrust mover magnetic steel assembly, a thrust stator magnetic steel assembly and a second support portion, the thrust mover magnetic steel assembly is arranged around the outer periphery of the main shaft, the thrust stator magnetic steel assembly is arranged around and spaced from the outer periphery of the thrust mover magnetic steel assembly, and the thrust stator magnetic steel assembly is fixedly connected to the housing via the second support portion.

4. The stern-integrated propulsion device based on magnetic power transmission according to claim 1, characterized by, The number of transmission structures is two, and the two transmission structures are respectively arranged on both sides of the support structure in the axial direction of the main shaft.

5. The stern-integrated propulsion device based on magnetic transmission according to claim 1, characterized in that, The sealing structure further includes an elastic member and a sealing mounting seat, the connecting portion is provided with a cavity for mounting the elastic member, the elastic member is arranged in the cavity, one end of the elastic member is connected to the connecting portion, the other end is connected to the sealing mounting seat, and the static sealing ring is arranged in the sealing mounting seat.

6. The stern-integrated propulsion device based on magnetic transmission according to claim 5, characterized in that, The sealing structure further comprises a pressing ring, a boss is arranged on one side of the sealing mounting base towards the dynamic sealing ring, the pressing ring is arranged around the outer periphery of the boss in the radial direction of the main shaft, and the static sealing ring is clamped between the boss and the pressing ring.

7. The stern-integrated propulsion device based on magnetic transmission according to claim 6, characterized in that, An inner wall of the boss towards the static sealing ring is formed with a pressing surface, the pressing surface extends inwards and inclines towards the dynamic sealing ring, and the static sealing ring abuts against the pressing surface.

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