Oil blocking device for deepwater submersible electric propulsion and marine electric propulsion

Abstract

The utility model relates to the technical field of ocean engineering, and particularly discloses an oil resisting device of a deepwater submersible electric propeller and a marine electric propeller, which comprises a propeller main body, the top of the propeller main body is fixedly connected with a wire conduit, and the top end of the wire conduit is inserted with a connecting pipe; through cooperative cooperation of a connecting pipe, a sealing sleeve, a first sleeving frame, a mounting pipe, a second sleeving frame, a bakelite plate and a discharge pipe, the sealing sleeve sleeving the outer wall of the connecting pipe forms a first anti-seepage barrier through an elastic sealing material, insulating oil in a motor is effectively prevented from leaking out, and the first sleeving frame at the top end of the sealing sleeve is rigidly connected with the mounting pipe to form a multi-layer sealing cavity. The sealing performance of the whole structure is remarkably enhanced, the second sleeving frame on the outer wall of the mounting pipe not only reinforces the whole structure, but also provides a stable mounting space for the bakelite plate, and the bakelite plate serving as an insulating barrier not only blocks the contact between an oil path and an electrical component, but also eliminates oil leakage channels among multiple strands of cables, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. The leakage problem of a traditional sealing structure is fundamentally solved.

Description

Technical Field

[0001] This utility model belongs to the field of marine engineering technology, specifically relating to an oil blocker for deep-sea submersible electric propulsion and marine electric propulsion. Background Technology

[0002] In the field of marine engineering technology, with the increasing frequency of underwater exploration, operations and scientific research activities, the application of deep-sea motors is becoming more and more widespread. These motors are usually mounted on underwater robots (AUVs), deep-sea submersibles or underwater work platforms to drive them for efficient and stable propulsion. The operating environment of deep-sea motors is extremely harsh. They not only have to withstand water pressure of up to thousands of meters, but also need to work continuously under low temperature and high salt corrosion conditions. In this environment, the sealing and lubrication technology of the motor becomes the key to ensuring its stable operation.

[0003] Traditional deep-sea motor sealing structures often use a single sealing ring or O-ring for oil sealing. However, these structures often fail to maintain sealing performance for extended periods under the high pressure of deep water, easily leading to lubricant leakage. Lubricant leakage not only causes wear on components such as motor bearings, reducing motor lifespan, but may also cause short circuits in electrical components, threatening the safety of the entire underwater work platform. Furthermore, traditional sealing structures lack design flexibility and cannot effectively cope with dynamic changes in parameters such as temperature and pressure in deep water environments, resulting in a significant reduction in sealing effectiveness. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide an oil stopper for deep-sea submersible electric propulsion and marine electric propulsion, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An oil stopper for deep-sea submersible electric propulsion and marine electric propulsion includes:

[0007] Thruster body;

[0008] A wire conduit is fixedly connected to the top of the thruster body, a connecting pipe is inserted into the top of the wire conduit, and the bottom of the connecting pipe is inserted into the inner wall of the thruster body.

[0009] A sealing sleeve is fitted onto the surface of the connecting pipe. A first socket frame is fixedly connected to the top end of the sealing sleeve. An installation pipe is fixedly connected to the top end of the first socket frame. A second socket frame is fitted onto the surface of the installation pipe. A bakelite board is fixedly connected to the inner wall of the first socket frame. An O-ring is fitted onto the surface of the bakelite board. A discharge pipe is fixedly connected to the top end of the second socket frame.

[0010] Preferably, the front end of the thruster body has multiple sets of air holes, and the multiple sets of air holes are evenly distributed through holes.

[0011] Preferably, a pressure-stabilizing guide ridge is fixedly connected to the bottom of the thruster body.

[0012] Preferably, a propeller is rotatably connected to the tail end of the thruster body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) Through the coordinated operation of the connecting pipe, sealing sleeve, first socket frame, installation pipe, second socket frame, bakelite board and discharge pipe, efficient sealing and long-term lubrication of the insulating oil inside the motor in deep water environment are achieved. The sealing sleeve sleeved on the outer wall of the connecting pipe forms the first anti-seepage barrier through the elastic sealing material, which effectively prevents the insulating oil from leaking out. The first socket frame at its top is rigidly connected to the installation pipe to form a multi-layer sealing cavity, which significantly enhances the sealing performance of the overall structure. The second socket frame on the outer wall of the installation pipe not only strengthens the overall structure, but also provides a stable installation space for the bakelite board. The bakelite board, as an insulating barrier, not only blocks the contact between the oil circuit and the electrical components, but also eliminates the oil seepage channel between the multiple cables, fundamentally solving the leakage problem of the traditional sealing structure. Through the organic combination of multi-level sealing and functional layering, the oil blocker can still maintain excellent sealing performance in deep water high pressure environment, while ensuring the long-term stable operation of the motor under oil lubrication conditions, which greatly improves the working reliability and service life of the deep water motor.

[0015] (2) Through the setting of air holes, pressure-stabilizing guide ridges and propellers, when in use, the air holes form a uniformly distributed through-hole structure at the front end of the propeller body to balance the air pressure inside and outside the motor, and prevent the pressure difference between the inside and outside of the sealed cavity from being too large due to high pressure in deep water or temperature changes, thereby avoiding oil seal deformation or abnormal leakage of lubricating oil; at the same time, the uniform distribution design of air holes can reduce the impact of water turbulence on the front end of the motor, ensuring the stability of the internal oil circuit. The pressure-stabilizing guide ridge is fixed at the bottom of the propeller body, and its streamlined structure can guide the external water flow to pass smoothly through the motor housing, reducing the interference of turbulence on the sealing interface of the oil blocker. At the same time, the operating resistance is reduced through fluid dynamics optimization, and the motor energy efficiency is improved, thereby jointly ensuring the sealing reliability and long-term lubrication performance of the oil blocker in the complex environment of deep water. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a perspective view of the sealing sleeve of this utility model;

[0018] Figure 3 This is a perspective view of the bakelite board of this utility model;

[0019] Figure 4 This is a perspective view of the connecting pipe of this utility model;

[0020] In the diagram: 1. Thruster body; 2. Wire conduit; 3. Connecting pipe; 4. Sealing sleeve; 5. First socket frame; 6. Mounting pipe; 7. Second socket frame; 8. Phenolic board; 9. Discharge pipe; 10. Air hole; 11. Pressure stabilizing guide ridge; 12. Propeller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figures 1 to 4 As shown, an oil slug for a deep-sea submersible electric propulsion system and a marine electric propulsion system includes: a propulsion body 1, which provides structural support.

[0024] A wire conduit 2 is fixedly connected to the top of the thruster body 1. A connecting pipe 3 is inserted into the top of the wire conduit 2, and the bottom end of the connecting pipe 3 is inserted into the inner wall of the thruster body 1. The wire conduit 2 and the connecting pipe 3 at the top of the thruster body 1 are connected to form a cable channel. At the same time, the bottom end of the connecting pipe 3 extends into the interior of the thruster body 1 to fix the oil circuit interface.

[0025] A sealing sleeve 4 is fitted onto the surface of the connecting pipe 3. A first socket frame 5 is fixedly connected to the top of the sealing sleeve 4. An installation pipe 6 is fixedly connected to the top of the first socket frame 5. A second socket frame 7 is fitted onto the surface of the installation pipe 6. A bakelite board 8 is fixedly connected to the inner wall of the first socket frame 5. An O-ring is fitted onto the surface of the bakelite board 8. The sealing sleeve 4 fitted onto the outer wall of the connecting pipe 3 prevents lubricating oil from leaking out through an elastic sealing material. The first socket frame 5 at its top is rigidly connected to the installation pipe 6, forming a multi-layer sealing cavity. The sealing sleeve 4 forms the first axial seal. The gap between the cable and the pipe wall is sealed by compressing the sealing material (such as an O-ring) through an interference fit. The first socket frame 5 and the second socket frame 7 are pressed together with the bakelite board 8 by bolts. The high density of the bakelite board is used to convert the multi-strand copper wire cable into a single conductor that runs through it, completely eliminating the oil leakage gap between the multi-strand wires. The installation pipe 6 serves as a transition structure to fix the position of the socket frame, ensuring that the bakelite board is subjected to uniform force. A discharge pipe 9 is fixedly connected to the top of the second socket frame 7.

[0026] In deep-water, high-pressure environments, silicone heat-conducting oil within the motor cavity is prone to leakage along the gaps between the copper wires of multi-strand cables. This oil blocker, through a combination of a single-strand conductor replacing multi-strand wires, physical blocking with bakelite boards, and multi-stage sealing, completely cuts off the oil leakage path. The thickness and hardness of the bakelite board 8 resist water pressure deformation, and the O-ring assists in dynamic sealing, confining the high-pressure oil within the motor cavity and ensuring normal circulation of the heat-conducting oil and motor heat dissipation. Simultaneously, the vent 10 regulates the internal and external air pressure difference, preventing pressure buildup from exacerbating the risk of oil leakage. This design not only solves the technical problem of oil seal failure in deep-water motors but also simplifies the cable sealing process, significantly improving the reliability and lifespan of the equipment.

[0027] Example 2:

[0028] Please see Figures 1 to 4 As shown, the front end of the thruster body 1 has multiple sets of air holes 10, which are evenly distributed through holes. This forms a uniformly distributed through hole structure at the front end of the thruster body 1, which is used to balance the air pressure inside and outside the motor and prevent excessive pressure difference between the inside and outside of the sealed cavity due to deep water pressure or temperature changes, thereby avoiding oil seal deformation or abnormal leakage of insulating oil. At the same time, the uniform distribution design of the air holes 10 can reduce the impact of water turbulence on the front end of the motor and ensure the stability of the internal oil circuit. A pressure-stabilizing guide ridge 11 is fixedly connected to the bottom of the thruster body 1. The pressure-stabilizing guide ridge 11 is fixed to the bottom of the thruster body 1, and its streamlined structure can guide the external water flow smoothly through the motor housing, reducing the impact of turbulence on the sealing interface of the oil blocker. The interference is reduced by optimizing fluid dynamics to reduce operating resistance and improve motor efficiency. The rigid support of the guide ridge can enhance the overall structural strength of the propeller body 1 and prevent shell deformation in deep water and high pressure environment. The tail end of the propeller body 1 is rotatably connected to the propeller 12. The axial thrust generated by the rotation of the propeller 12 not only drives the motor forward, but also forms a low pressure zone through the tail water flow, which helps to guide the insulating oil from the oil guide hole to the oil bladder and avoids the oil from accumulating in the bearing area. The speed and thrust of the propeller 12 are further linked with the air pressure regulation function of the air hole 10 to ensure that the motor can maintain stable internal oil pressure under dynamic conditions.

[0029] Example 3:

[0030] Please see Figures 1 to 4 As shown, in the field of deep-sea resource exploration, a certain type of autonomous underwater vehicle (AUV) needs to be equipped with a high-power propulsion motor, operating at a depth of up to 3000 meters, facing a high-pressure environment of 30MPa, a low temperature of 4℃, and high-salt corrosion. Traditional motor sealing structures suffer from increased bearing wear (an average of 3 failures per year) and decreased insulation performance (insulation resistance <10MΩ) due to oil leakage during long-term operation, severely affecting mission continuity. This oil blocker, through multi-stage sealing and dynamic pressure balance design, has been successfully applied to the propulsion system of this AUV.

[0031] The propeller body 1 of the oil blocker is fixed to the motor housing by bolts through the flange, and the bottom pressure stabilizing guide ridge 11 is aligned with the streamlined cabin of the AUV to optimize underwater hydrodynamic performance and reduce turbulent resistance by 15%.

[0032] The conduit 2 is connected to the motor power cable, the connecting pipe 3 is connected to the internal lubrication oil circuit, and the sealing sleeve 4 is tightened with a fluororubber O-ring (pressure resistant 35MPa) to form the first axial seal.

[0033] The bakelite board 8 (20mm thick, insulation strength > 20kV / mm) is embedded between the first socket frame 5 and the second socket frame 7, and compressed to a deformation tolerance of 0.1mm by the pre-tightening force of the hydraulic bolts to ensure seamless penetration after the multi-strand cable is converted into a single conductor.

[0034] During the descent phase: 10 air vents are evenly distributed at the front end of the thruster body (2mm diameter × 12 vents) to balance the internal and external air pressure in real time and prevent the sealing cavity from deforming due to 30MPa water pressure (pressure difference controlled within ±0.2MPa).

[0035] The stepped nesting structure of the sealing sleeve 4 and the socket frame forms a three-level dynamic seal under axial pressure, with a leakage rate of <0.01mL / h (measured data);

[0036] When the propeller speed is 1200 rpm, the low-pressure area (-5 kPa) at the tail, together with the oil guide hole, draws the lubricating oil in the bearing area to the oil sac to avoid oil accumulation (the oil film thickness is stable at 50±5 μm).

[0037] The pressure-stabilizing guide ridge 11 reduces turbulent vibration, thereby reducing the wear rate of the sealing interface by 60% (increasing the service life to 5000 hours).

[0038] Every 200 hours of operation, replenish the low-temperature resistant synthetic lubricating oil (viscosity ISO VG 68) through the discharge pipe 9, and test the insulation resistance of the bakelite board 8 (continuously >100MΩ);

[0039] Continuous deep-sea tests show that:

[0040] The bearing temperature rise is controlled within 45℃ (65℃ for traditional structures);

[0041] The lubricating oil change interval has been extended to 800 hours (from 300 hours).

[0042] The success rate of continuous AUV operations increased from 78% to 98%.

[0043] Working principle: The main body 1 of the thruster serves as the core support structure. The top of the main body 1 is connected to the connecting pipe 3 to form a cable channel. At the same time, the bottom end of the connecting pipe 3 extends into the interior of the main body 1 to fix the oil circuit interface. The sealing sleeve 4, which is fitted on the outer wall of the connecting pipe 3, prevents lubricating oil from leaking out through the elastic sealing material. The first socket frame 5 at the top of the connecting pipe 4 is rigidly connected to the mounting pipe 6 to form a multi-layer sealed cavity. The second socket frame 7 on the outer wall of the mounting pipe 6 further reinforces the overall structure and accommodates the bakelite board 8. The bakelite board 8 acts as an insulating barrier to isolate the oil circuit from the electrical components and avoid the risk of short circuit. The stepped nesting design of the sealing sleeve 4 and the socket frame forms multiple dynamic seals through axial compression, effectively resisting oil leakage in deep water and high-pressure environments. The air vent 10 at the front end of the propeller body 1 balances the internal and external air pressure of the motor through a uniformly distributed through-hole structure, preventing seal failure caused by high pressure or temperature changes in deep water. The pressure-stabilizing guide ridge 11 at the bottom of the propeller body 1 guides the external water flow through a streamlined structure, reducing the interference of turbulence on the sealing interface and enhancing the overall structural strength. The propeller 12 at the tail end of the propeller body 1 generates axial thrust and a low-pressure area at the tail when rotating, which helps guide the circulation of lubricating oil and avoids oil accumulation in the bearing area. The oil resistance and insulation of the bakelite board 8 ensure the long-term stable operation of the motor under oil lubrication conditions, while the synergistic effect of the air vent 10, the pressure-stabilizing guide ridge 11 and the propeller 12 further optimizes the sealing reliability and lubrication efficiency in deep water environments.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes (such as the cable oil blocker being installed in other locations on the submersible and motor) can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-suppressing device for deep-sea submersible electric propulsion and marine electric propulsion, characterized in that, include: Thruster body (1); The top of the thruster body (1) is fixedly connected to a wire tube (2), and a connecting tube (3) is inserted into the top of the wire tube (2), and the bottom end of the connecting tube (3) is inserted into the inner wall of the thruster body (1). A sealing sleeve (4) is fitted onto the surface of the connecting pipe (3). A first socket frame (5) is fixedly connected to the top end of the sealing sleeve (4). An installation pipe (6) is fixedly connected to the top end of the first socket frame (5). A second socket frame (7) is fitted onto the surface of the installation pipe (6). A bakelite board (8) is fixedly connected to the inner wall of the first socket frame (5). An O-ring is fitted onto the surface of the bakelite board (8). A discharge pipe (9) is fixedly connected to the top end of the second socket frame (7).

2. The oil slicker for deep-sea submersible electric propulsion and marine electric propulsion according to claim 1, characterized in that: The front end of the propeller body (1) has multiple sets of air holes (10), and the multiple sets of air holes (10) are evenly distributed through holes.

3. The oil slicker for deep-sea submersible electric propulsion and marine electric propulsion according to claim 1, characterized in that: The bottom of the thruster body (1) is fixedly connected to a pressure-stabilizing guide ridge (11).

4. The oil stopper for deep-sea submersible electric propulsion and marine electric propulsion according to claim 1, characterized in that: The propeller (12) is rotatably connected to the tail end of the propeller body (1).

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