Watercraft propulsion device, watercraft propeller and watercraft movable apparatus

Abstract

The utility model provides a kind of water area power device, water area propeller and water area movable equipment, water area power device includes: casing, motor, torque output shaft, first sensor and sealing device, casing is equipped with first cavity and with first cavity communication's shaft port, motor is fixed in first cavity, torque output shaft is connected with motor shaft, torque output shaft passes through shaft port, sealing device includes the first sealing ring and second sealing ring being configured between torque output shaft and the inner wall of shaft port, first sensor is fixed between first sealing ring and second sealing ring, for sensing the cavity air pressure change between first sealing ring, second sealing ring.Such, it has realized the monitoring of the failure of sealing system, effectively avoids motor damage due to water, improves the operation safety and fault handling efficiency of water area power device.

Description

Technical Field

[0001] This application relates to the field of aquatic power equipment technology, and in particular to an aquatic power device, aquatic propulsion device, and aquatic mobile equipment. Background Technology

[0002] Currently, some electric outboard motors house the propeller motor within an underwater hull. While the propeller shaft uses dynamic seals to seal the gap between the shaft and the underwater hull, the complex operating conditions of the shaft and the underwater environment during prolonged rotation make it susceptible to trapping underwater debris. Once debris gets trapped between the shaft and the seal, more debris can enter, causing the seal to break down under pressure. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a water-based power device, a water-based propulsion device, and a water-based mobile device, which monitors sealing system failures and improves the safety of underwater motor systems.

[0004] In a first aspect, this utility model provides an aquatic power device, including a housing, a motor, a torque output shaft, a first sensor, and a sealing device. The housing has a first cavity and a shaft port communicating with the first cavity. The motor is fixed in the first cavity. The torque output shaft is connected to the motor shaft and passes through the shaft port. The sealing device includes a first sealing ring and a second sealing ring disposed between the torque output shaft and the inner wall of the shaft port. The first sensor is fixed between the first sealing ring and the second sealing ring and is used to sense the cavity air pressure change between the first sealing ring and the second sealing ring.

[0005] Specifically, the housing is also provided with a cable port communicating with the first cavity, the water power device is also provided with a cable seal and a second sensor, the cable seal cooperates with the cable port, the motor is provided with a cable passing through the cable seal, the sealing device includes a third sealing ring and a fourth sealing ring disposed between the cable seals, and the second sensor is fixed between the third sealing ring and the fourth sealing ring for sensing the cavity air pressure change between the third sealing ring and the fourth sealing ring.

[0006] Specifically, the aquatic power device further includes a third sensor fixed inside the first cavity, the third sensor being used to sense changes in air pressure inside the first cavity.

[0007] Specifically, the housing includes a main housing and an end cap that covers the main housing. The first cavity is disposed in the main housing. One end of the end cap is fixedly connected to the main housing, and the other end protrudes relative to the main housing. The shaft port is disposed in the end cap. The water power device also includes a bearing fixed to the end cap and located in the first cavity. The bearing cooperates with the torque output shaft. The first sealing ring and the second sealing ring are located on the side of the bearing away from the motor.

[0008] Specifically, the end cover includes a front cover that fits with the main shell and a rear cover that is fixed to the front cover. The front cover has a bearing groove, and the bearing is fixed in the bearing groove. The rear cover has a first sealing groove near the front cover and a second sealing groove away from the front cover, as well as a cavity located between the first sealing groove and the second sealing groove. The first sealing ring is fixed in the first sealing groove, the second sealing ring is fixed in the second sealing groove, and the first sensor is fixed in the cavity.

[0009] Specifically, the rear cover is provided with a drainage channel communicating with the cavity, and a one-way valve disposed in the drainage channel. The one-way valve allows water in the cavity to be discharged through the drainage channel and prevents water outside the drainage channel from entering the cavity.

[0010] Specifically, the aquatic power unit also includes an alarm that is electrically connected to the first sensor and the second sensor.

[0011] Specifically, the water power device further includes a motor controller, which is fixed in the first cavity on the side away from the rotating shaft port and electrically connected to the motor.

[0012] Specifically, the aquatic power unit includes a propeller, which is connected to one end of the torque output shaft that passes through the shaft port.

[0013] Secondly, this utility model provides a water propulsion device, including the water power device in the first aspect of this utility model. The water propulsion device also includes a body connected to the housing and a bracket connected to the body, and the bracket is used for connecting to a water carrier.

[0014] Thirdly, this utility model provides a water-based mobile device, including the water propulsion device in the second aspect of this utility model, and a water-based carrier.

[0015] As can be seen from this embodiment, the underwater power device includes a housing, a motor, a torque output shaft, a first sensor, and a sealing device. The housing has a first cavity and a shaft port communicating with the first cavity. The motor is fixed in the first cavity, and the torque output shaft is connected to the motor shaft, passing through the shaft port. The sealing device includes a first sealing ring and a second sealing ring disposed between the torque output shaft and the inner wall of the shaft port. The first sensor is fixed between the first and second sealing rings and is used to sense changes in the cavity air pressure between the first and second sealing elements. This enables monitoring of sealing system failure, sending sealing failure information after the first seal fails, promptly reminding maintenance, effectively preventing motor damage due to water ingress, and improving the safety and intelligence level of the underwater motor system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an overall schematic diagram of a water power device provided in an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a hydrodynamic device provided in an embodiment of this utility model;

[0019] Figure 3 This is provided by the embodiment of the present utility model. Figure 1 An enlarged schematic diagram of the sealing device in the diagram;

[0020] Figure 4 This is provided by the embodiment of the present utility model. Figure 1 Another enlarged schematic diagram of the sealing device in the diagram;

[0021] Figure 5 This is a schematic diagram of another aquatic power device provided in this embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a water-based mobile device provided in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of another water-based mobile device provided in an embodiment of the present invention.

[0024] Figure label:

[0025] Casing 100, main casing 110, end cover 120, front cover 121, rear cover 122, propeller 200, motor 300, motor controller 301, first cavity 400, torque output shaft 401, shaft port 402, cable port 403, drainage channel 404, one-way valve 405, bearing 406, cable seal 407, sealing device 500, first sealing ring 501, second sealing ring 502, first sensor 503, third sealing ring 504, fourth sealing ring 505, second sensor 506, third sensor 507, alarm 600, water propulsion 700, head 701, guide pipe 702, pod propulsion 800, flange 801, driver 802, battery 803. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0028] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article indicates that the preceding and following related objects have an "or" relationship.

[0029] In this embodiment of the invention, "multiple" refers to two or more. In this embodiment of the invention, "connection" refers to various connection methods, such as direct or indirect connection, to achieve communication between devices; this embodiment of the invention does not impose any limitations on this.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] Existing underwater motor systems typically rely on mechanical seals for waterproofing, which are low in intelligence and lack monitoring and feedback mechanisms. This makes it difficult to provide timely warnings after seal failure, and users cannot be promptly reminded to replace or maintain the motor. Consequently, the motor is prone to further water ingress and damage. Therefore, monitoring the failure of waterproof sealing systems is essential.

[0032] To address the aforementioned problems, this application provides a water-based power device; please refer to... Figure 1 , Figure 2 , Figure 1 This is an overall schematic diagram of a water power device provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal cross-sectional structure of a hydrodynamic device provided in an embodiment of this utility model, as shown below. Figure 1 , Figure 2 As shown, the water power device includes a housing 100, a motor 300, a torque output shaft 401, and a sealing device 500. The housing 100 is provided with a first cavity 400 and a shaft port 402 communicating with the first cavity 400. The motor 300 is fixed inside the first cavity 400. The torque output shaft 401 is connected to the motor 300 shaft and passes through the shaft port 402.

[0033] The propeller 200 is connected to a torque output shaft 401 that passes through one end of the shaft port 402.

[0034] The housing 100 is also provided with a cable port 403 that communicates with the first cavity 400.

[0035] Specifically, the housing 100 includes a main housing 110 and an end cover 120 that covers the main housing 110. A first cavity 400 is disposed on the main housing 110. One end of the end cover 120 is fixedly connected to the main housing 110, and the other end protrudes relative to the main housing 110. A rotating shaft port 402 is disposed on the end cover 120.

[0036] The end cap 120 includes a front cover 121 that covers the main shell 110 and a rear cover 122 that is fixed to the front cover 121.

[0037] Specifically, the rear cover 122 is provided with a drainage channel 404 communicating with the cavity, and a one-way valve 405 disposed in the drainage channel 404. The one-way valve 405 allows water in the cavity to be discharged through the drainage channel 404 and prevents water outside the drainage channel 404 from entering the cavity.

[0038] Understandably, the main hull 110 has a "cabin-like" profile, forming the main load-bearing structure of the aquatic power unit. The end cap 120 has a "stepped protruding structure," with one end covering the main hull 110 and the other end extending outward. The propeller 200 is connected to the torque output shaft 401, receiving torque from the torque output shaft 401, thus forming a power link in which the torque output shaft 401 passes through the end cap 120, transmitting power from the motor 300 to the propeller 200.

[0039] Furthermore, the water power device also includes a motor controller 301, which is fixed inside the first cavity 400 on the side away from the rotating shaft port 402 and electrically connected to the motor 300.

[0040] It needs to be made clear that, Figure 1 , Figure 2 This application only shows one example of a "split housing (main housing 110 and end cover 120, with the end cover 120 divided into front and rear), single-stage torque output shaft 401, and single-sided cable port 403". This application does not limit the specific structure, connection method, or distribution position. In practical applications, the following structures can be flexibly varied:

[0041] Structural variations of housing 100: Housing 100 can adopt a one-piece molding design, such as the main housing 110 and end cover 120 not being separated, and the chamber and port being directly formed through processing technology; the separation method of the "front cover 121 and rear cover 122" of end cover 120 can be adjusted, such as a three-section or nested end cover, as long as it meets the function of "one end connected to the main housing and one end protruding"; housing 100 can be provided with a cover plate at the other end away from end cover 120 so that the motor can be installed in housing 100.

[0042] Variations in the connection method of torque output shaft 401: For example, torque output shaft 401 and motor 300 can be connected by a "split coupling" (rather than) Figure 2 As shown in the coaxial extension), the torque output shaft 401 and the motor 300 shaft are indirectly connected by a coupling to adapt to different motor 300 shaft system designs; the torque output shaft 401 can be designed as a "multi-segment splicing structure", that is, the torque output shaft 401 is composed of two or more independent shaft ends combined by splicing, so as to flexibly adapt to complex scenarios, as long as the continuity of torque transmission is guaranteed.

[0043] As can be seen, in this embodiment of the utility model, the water power device includes a housing 100, a motor 300, a torque output shaft 401, and a sealing device 500. The housing 100 has a first cavity 400 and a shaft port 402 communicating with the first cavity 400. The motor 300 is fixed inside the first cavity 400. The torque output shaft 401 is connected to the motor shaft and passes through the shaft port 402. The propeller 200 is connected to the torque output shaft 401 passing through the shaft port 402. One end of 2; the housing 100 is also provided with a cable port 403 communicating with the first cavity 400; the housing 100 includes a main housing 110 and an end cover 120 that covers the main housing 110, the first cavity 400 is disposed on the main housing 110, one end of the end cover 120 is fixedly connected to the main housing 110, and the other end protrudes relative to the main housing 110, and the shaft port 402 is disposed on the end cover 120; the end cover 120 includes a front cover 121 that covers the main housing 110 and a rear cover 122 that is fixed to the front cover 121. In this way, by constructing a basic architecture of a split housing, a closed cavity, and a through torque output shaft, the closed cavity isolates the motor from the shaft sealing area to ensure the motor's waterproofness, and the through shaft ensures continuous power transmission and reserves sealing and sensing interfaces, adapting to the motor water ingress warning requirements of complex underwater scenarios.

[0044] The following is combined with Figure 3 , Figure 4 ,by Figure 1 and Figure 2 Based on this, the sealing device 500 will be further explained.

[0045] Please see Figure 3 , Figure 3 This is provided by the embodiment of the present utility model. Figure 1 An enlarged structural diagram of the sealing device in the diagram is shown below. Figure 3 As shown, the water power device also includes a first sensor 503, and the sealing device 500 includes a first sealing ring 501 and a second sealing ring 502 disposed between the inner wall of the torque output shaft 401 and the shaft port 402. The first sensor 503 is fixed between the first sealing ring 501 and the second sealing ring 502 and is used to sense the cavity air pressure change between the first sealing ring 501 and the second sealing ring 502.

[0046] Specifically, the water power device also includes a bearing 406 fixed to the end cover 120 and located in the first cavity 400. The bearing 406 cooperates with the torque output shaft 401. The first sealing ring 501 and the second sealing ring 502 are located on the side of the bearing 406 away from the motor 300.

[0047] Specifically, the front cover 121 is provided with a bearing groove, the bearing 406 is fixed in the bearing groove, the rear cover 122 is provided with a first sealing groove near the front cover 121 and a second sealing groove away from the front cover 121, as well as a cavity located between the first sealing groove and the second sealing groove, the first sealing ring 501 is fixed in the first sealing groove, the second sealing ring 502 is fixed in the second sealing groove, and the first sensor 503 is fixed in the cavity.

[0048] Furthermore, combined Figure 1 , Figure 2 It is known that the water power device also includes an alarm 600 that is electrically connected to the first sensor 503.

[0049] For example, alarm 600 includes, but is not limited to, audible and visual alarms.

[0050] For example, depending on the application scenario of different water-based power units (such as outboard motors and podded propulsion systems), the installation location of the alarm 600 needs to be adapted to the equipment structure and the operator's observation convenience, while maintaining a stable connection with the first sensor 503. Taking the outboard motor case as an example, the alarm 600 is preferably installed on the upper part of the motor head or the side of the guide pipe in the water area. The guide pipe is the water flow guiding structure of the outboard motor. Specifically, the alarm 600 can be fixed by the mounting bracket preset on the motor head, or the alarm 600 can be embedded in the waterproof housing of the guide pipe for installation and fixation. Furthermore, the cable of the first sensor 503 is led out from the independent sealing hole of the rear cover 122, runs upward along the inner wall of the main housing 110, passes through the waterproof connector at the bottom of the motor head, and can be directly connected to the corresponding signal interface of the alarm 600 inside the motor head.

[0051] It should be clarified that the above example only provides an example of the installation method of the alarm 600 and the connection method between the alarm 600 and the first sensor 503, and does not limit other reasonable installation and connection methods. For example, in the application scenario of pod propulsion, the alarm 600 can also be installed in the cabin, on the battery, or on the drive.

[0052] Understandable Figure 3 As an enlarged structural schematic diagram of the sealing device 500, it shows the integrated design of "dual sealing, real-time monitoring and water drainage" of the rotating shaft port 402: By setting a bearing 406 in the bearing groove of the front cover 121 to support the torque output rotating shaft 401, the first sealing groove and the second sealing groove of the rear cover 122 respectively fix the first sealing ring 501 and the second sealing ring 502 to form a two-level waterproof. The first sensor 503 is fixed in the cavity between the two sealing rings to monitor the air pressure change to warn of sealing failure. At the same time, the drainage channel 404 of the rear cover 122 and the one-way valve 405 realize the drainage of water accumulated in the cavity and prevent external water backflow, which not only ensures the reliability of the seal, but also realizes the early warning before failure, and can also avoid water accumulation from interfering with the sensor.

[0053] It needs to be made clear that, Figure 3 Only one specific structural diagram of "annular sealing groove, cavity built-in sensor, and single-sided drainage channel 404" is given. The shape of the sealing groove is not limited. For example, it can be set as stepped or wedge-shaped. The installation method of the sensor can be embedded or fixed by bracket. The number and position of the drainage channel 404 can be symmetrically set as multi-channel or one-way valve 405 type, such as diaphragm type or ball valve type. As long as the function of "multi-stage sealing monitoring and controllable drainage of water accumulation" can be achieved.

[0054] As can be seen, in this embodiment of the utility model, a two-stage waterproof structure is formed by the integrated structure of "support-sealing-monitoring-drainage" at the shaft port 402, the bearing groove of the front cover 121 supporting the torque output shaft 401 through the bearing 406, and the first and second sealing grooves of the rear cover 122 fixing the first sealing ring 501 and the second sealing ring 502 respectively. The cavity between the two sealing rings houses the first sensor 503 to monitor air pressure changes, and the rear cover 122 is also provided with a drainage channel 404 communicating with the cavity and a one-way valve 405. In this way, a double-sealed waterproof foundation is formed, the sensor realizes real-time early warning of seal failure, and the drainage structure avoids water accumulation in the cavity from interfering with monitoring. The three work together to improve the reliability of the seal and effectively prevent the motor from being damaged by water due to seal failure.

[0055] Please see Figure 4 , Figure 4 This is provided by the embodiment of the present utility model. Figure 1 Another enlarged structural diagram of the sealing device in the diagram is shown below. Figure 4 As shown, the water power device also includes a cable seal 407 and a second sensor 506. The cable seal 407 cooperates with the cable port 403. The motor 300 is provided with a cable passing through the cable seal 407. The sealing device 500 includes a third sealing ring 504 and a fourth sealing ring 505 disposed between the cable seals 407. The second sensor 506 is fixed between the third sealing ring 504 and the fourth sealing ring 505 and is used to sense the change in cavity air pressure between the third sealing ring 504 and the fourth sealing ring 505.

[0056] The alarm 600 is also electrically connected to the second sensor 506.

[0057] For example, the alarm 600 includes, but is not limited to, an audible and visual alarm. Taking an outboard motor as an example, the cable of the second sensor 506 is led out from inside the cable seal 407, and is arranged along the inner wall of the main housing 110 in coordination with the wiring of the first sensor 503. Near the bottom of the engine head, the cable of the second sensor 506 is either combined with the wiring of the first sensor 503 or passes independently into the engine head, and finally connects to the corresponding signal interface of the alarm 600 to achieve a stable connection with the alarm 600, ensuring signal transmission and waterproof sealing requirements.

[0058] It should be clarified that the above example only provides one example of the connection method between the alarm 600 and the first sensor 506, and does not limit other reasonable installation and connection methods.

[0059] It needs to be made clear that, Figure 4 The document only provides a schematic diagram of a specific structure: "the cable seal 407 has two built-in sealing rings, the sensor is directly fixed to the sealed cavity, and the sound and light alarm is linked." It does not limit the type of sealing ring, such as lip seal or V-type seal. The installation method of the second sensor 506 can be fixed by a bracket or embedded integration. The alarm mode of the alarm 600 can be expanded to wireless signal alarm or linked with the main control system of the equipment. As long as it can realize the function of "multi-level sealing of cable ports and monitoring and failure alarm of the sealed cavity", it is sufficient.

[0060] visible, Figure 4 As an enlarged schematic diagram of the sealing device 500 at the cable port 403, it shows the "dual sealing and failure monitoring and alarm linkage" design at the cable entry point: the cable seal 407 cooperates with the cable port 403 to wrap the cable passing through. The sealing device 500 forms a two-stage seal between the sealing rings through the third sealing ring 504 and the fourth sealing ring 505. The cavity between the two sealing rings fixes the second sensor 506 to monitor changes in air pressure. The second sensor 506 is electrically connected to the alarm 600 (such as an audible and visual alarm) to realize real-time early warning of cable seal failure.

[0061] It is understandable that, regardless of Figure 3 The 402 shaft port is still Figure 4 The 403 cable port utilizes a redundant protection and failure early warning system built upon "multi-level sealing and cavity status monitoring": multi-level sealing enhances basic waterproofing capabilities through layered protection, while sensors within the cavity monitor the sealing status in real time for early warning. This logic can naturally be extended to more levels—increasing the number of sealing levels (such as three or four levels) can further improve waterproofing redundancy, especially suitable for scenarios with higher requirements for sealing reliability, such as high pressure and long-term underwater operations; at the same time, sensors can be added between each pair of adjacent sealing levels to achieve more precise failure location, such as pinpointing which sealing level fails first, and maintaining the integrity of the "monitoring-early warning" function in conjunction with the alarm.

[0062] Please see Figure 5 , Figure 5 This is a schematic diagram of another aquatic power device provided in an embodiment of this utility model, as shown below. Figure 5 As shown, the water power device also includes a third sensor 507 fixed inside the first cavity 400, which is used to sense changes in air pressure inside the first cavity 400.

[0063] Specifically, the third sensor 507 can be installed on the motor 300. When the first sealing ring 501, the second sealing ring 502, or the third sealing ring 504 and the fourth sealing ring 505 fail, external water enters the motor 300. After detecting the water ingress, the third sensor 507 will input a feedback signal to the motor controller 301. The motor controller 301 will then input the signal to the alarm 600, such as an audible and visual alarm light, which will trigger the audible and visual alarm light to remind the user that the underwater motor 300 has water ingress and needs maintenance.

[0064] For example, the first sealing ring 501 and the second sealing ring 502 can be a primary oil seal and a secondary oil seal, and the third sealing ring 504 and the fourth sealing ring 505 can be a primary O-ring and a secondary O-ring. Oil seals and O-rings are two common sealing elements suitable for different sealing scenarios.

[0065] Specifically, an oil seal is a lip seal used for sealing rotating shafts. It is usually made of rubber and has a built-in spring to enhance the sealing performance. Its main functions are: to prevent lubricating oil from leaking from the gap between the shaft and the housing (providing excellent dynamic sealing for rotating shafts); and to prevent external water, dust, and other impurities from entering the equipment. In this device, the oil seal is used for dynamic sealing between the torque output shaft 401 (rotating component) and the shaft port 402, adapting to the shaft's rotational operation.

[0066] Specifically, an O-ring is an elastic sealing ring with a circular cross-section, usually made of rubber or silicone. Its main function is to achieve static sealing (such as gaps between fixed parts) or low-speed dynamic sealing by relying on its own elasticity to compress the sealing surface. In this device, it is used for static sealing between the cable seal 407 and the cable port 403 (the cable is relatively fixed and there is no high-speed rotation), with a simple structure and reliable sealing.

[0067] It should be clarified that oil seals and O-rings are only exemplary choices. In actual applications, they can be replaced with other structures depending on the sealing scenario (such as pressure, medium, and motion). The replacement principles include: adapting to the sealing scenario (rotation / stationary, pressure level, medium characteristics); and being compatible with the overall design of "multi-stage sealing and inter-stage sensor monitoring" (i.e., reserving a cavity between adjacent sealing stages for sensor installation to monitor the status).

[0068] Specifically, the structures of replaceable sealing rings include: V-type combination seals: composed of multiple V-shaped cross-section sealing rings stacked together, suitable for rotating shaft sealing under high pressure environments, with pressure resistance superior to ordinary oil seals; mechanical seals: precision seals composed of rotating rings, stationary rings, etc., suitable for high-speed rotating shafts, with more stable sealing performance (especially for high reliability requirements); lip seals: with a lip-shaped cross-section, sealing is achieved through the compression of the lip sealing surface, suitable for semi-dynamic scenarios such as cables (when cables have slight axial movement); and combination sealing gaskets: composed of a metal skeleton and an elastomer, suitable for high-pressure static sealing, etc.

[0069] Among them, the first sensor 503, the second sensor 506 and the third sensor 507 are, but are not limited to, pressure sensors to sense changes in the air pressure of the cavity to realize water ingress monitoring, and may also include resistive / capacitive humidity sensors, temperature sensors, ion sensors, etc.

[0070] Specifically, the working principle of the resistive / capacitive humidity sensor is as follows: A moisture-absorbing material is placed around the resistive / capacitive humidity sensor. The sensor can monitor the resistance / capacitance value of the material. When the second sealing ring 502 on the right side of the cavity fails or the third sealing ring 504 on the top of the cavity fails, external water enters between the first and second sealing rings on the right side of the cavity and between the third and fourth sealing rings on the top of the cavity. The moisture-absorbing material absorbs external water, causing a change in the resistance / capacitance value of the material. The resistive / capacitive humidity sensor detects a significant change in the resistance / capacitance value of the material and triggers the alarm 600, such as an audible and visual alarm light, to remind the user that the underwater motor has water ingress and needs maintenance.

[0071] Specifically, the working principle of the temperature sensor is as follows: the sensor can monitor the temperature of a small area of ​​the surrounding environment. When the second sealing ring 502 on the right side of the cavity fails or the third sealing ring 504 on the top of the cavity fails, external water enters between the first and second sealing rings on the right side of the cavity and between the third and fourth sealing rings on the top of the cavity. The external water quality causes the temperature to change. The temperature sensor detects a significant change in the ambient temperature and will trigger the alarm 600, such as an audible and visual alarm light to remind the user that the underwater motor has water ingress and needs maintenance.

[0072] Specifically, the working principle of the ion sensor is as follows: the sensor can monitor the concentration of specific ions in the water (such as Na and Cl in seawater). When the second sealing ring 502 on the right side of the cavity fails or the third sealing ring 504 on the top of the cavity fails, external water enters between the first and second sealing rings on the right side of the cavity and between the third and fourth sealing rings on the top of the cavity. When specific ions (such as Na and Cl in seawater) are detected, the alarm 600 will be triggered. For example, the sound and light alarm will light up to remind the user that the underwater motor needs to be repaired due to water ingress.

[0073] As can be seen, in this embodiment of the utility model, by adding a third sensor 507 to the first cavity 400 to form the ultimate monitoring defense line, combined with the preceding multi-stage sealing and inter-stage sensors, and with the use of various types of sensors such as pressure, humidity, temperature, and ions to adapt to different scenarios, and supporting the diversified replacement of sealing components such as oil seals and O-rings, it not only realizes the full-link monitoring from the first-stage sealing failure early warning, the second-stage sealing protection to the ultimate alarm of water ingress into the cavity, but also adapts to complex underwater environments through flexible selection of sensors and sealing components, greatly improving the waterproof reliability, scenario adaptability and comprehensiveness of fault response of the device.

[0074] Understandably, the aquatic power unit itself is the core component that provides propulsion and can be configured on the aquatic thruster. The aquatic thruster also includes a body that connects to the housing and a bracket that connects to the body. The bracket is used for connecting aquatic carriers, such as small boats, underwater robots, and buoys. This solves the problem of "connection compatibility" between the power unit and the carrier, realizes the upgrade from "single power component" to "modular thruster", and expands the flexibility of application scenarios.

[0075] Furthermore, the water-based mobile device includes a water-based thruster and a water-based carrier. The water-based mobile device represents the final application form, integrating the "thruster (power) and the carrier (load-bearing)" to create a device with complete mobility. For example, if the water-based carrier is an underwater robot, the thruster provides power to move it underwater; if the carrier is a small fishing boat, the thruster propels it forward. This clarifies the end-application scenarios of the technical solution.

[0076] The following is combined with Figure 6 , Figure 7 Further explanation is provided regarding water-based mobile equipment equipped with this water thruster.

[0077] Please see Figure 6 , Figure 6 This is a structural schematic diagram of a water-based mobile device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the water-mobile device is equipped with a water propulsion unit 700. The water propulsion unit 700 is illustrated using an outboard motor as an example.

[0078] Among them, the water propulsion unit 700 is externally mounted to the stern of the hull via a clamping structure. The water propulsion unit 700 includes an exposed head 701 and a guide pipe 702, which conforms to the characteristics of outboard motors being "externally mounted and easy to disassemble and assemble". It is suitable for small fishing boats, recreational boats and other scenarios where cost is sensitive and the propulsion unit needs to be frequently disassembled and assembled.

[0079] Specifically, the nose section 701 has a built-in control center responsible for receiving commands and monitoring faults, and it also has a reserved operating interface for easy human-machine interaction. The nose section 701 is completely exposed in the water area (a typical design for outboard motors), with ample space and easy visibility for the operator. The alarm 600 can be directly embedded in the shell of the nose section 701, utilizing the "water visibility" of the nose section 701 to allow the operator to quickly detect alarm signals from the operating position (such as the bridge at the stern).

[0080] Specifically, the guide pipe 702 encloses the internal rotating shaft and sealing structure, protecting the power transmission components from entanglement with aquatic plants and debris, while also providing support and connection for the head unit 701 and the aquatic power unit. Part of the guide pipe 702 is exposed above water (the section near the head unit 701). If space is insufficient in the head unit 701, a small audible and visual alarm can be installed on the upper part of the guide pipe 702 (the above-water section), secured with a waterproof bracket.

[0081] Further, please refer to Figure 7 , Figure 7 This is a schematic diagram of another water-based mobile device provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the water-based mobile equipment is equipped with a water-based thruster 700, and the water-based thruster 800 is illustrated by an example of a pod thruster 800.

[0082] The pod propulsion unit 800 is connected to the bottom of the hull (e.g., via flange 801 / fixed seat), and components such as the drive unit 802 and battery 803 are built into the hull, making it suitable for scenarios with high requirements for space utilization and overall appearance, such as yachts and unmanned vessels.

[0083] Specifically, the flange 801 securely installs the podded propeller 800 at the bottom of the hull or other designated locations via bolts and other connecting components. It can also evenly transmit the thrust generated by the propeller 200 to the hull and withstand various forces applied to the propeller during the movement of the hull.

[0084] Specifically, the driver 802 is mainly responsible for driving and controlling the motor 300 to realize the power output of the propeller, and precisely adjusting the speed and direction of the motor 300 according to the operating instructions of the ship's navigator, as well as monitoring the working status of the motor 300 in real time and taking timely protective measures.

[0085] Specifically, battery 803 is used for energy storage and supply, providing power to the pod propulsion unit 800. Alarm 600 can be installed inside the hull, on battery 803, or on drive unit 802.

[0086] As can be seen, in this embodiment of the utility model, the water-based mobile equipment equipped with aquatic propulsion devices is divided into two categories: externally mounted water propulsion units 700 and integrated podded propulsion units 800. The former is externally mounted to the hull via a clamping structure, with the engine head 701 exposed and equipped with an alarm 600 and a flow guide pipe 702 protecting the rotating shaft, making it suitable for small scenarios requiring frequent disassembly and assembly. The latter is integrated with the hull via a flange 801, with a driver 802 controlling a motor 300 and a battery 803 providing power. The alarm 600 is located inside the pod or on the equipment, making it suitable for scenarios with high space requirements. Both types, through targeted structures and alarm layouts, achieve real-time fault warnings, meet the adaptation needs of different scenarios, and improve the operational safety and scenario adaptability of the equipment.

[0087] To enable those skilled in the art to understand this application, the following description is given, using the first sensor 503 and the second sensor 506 as pressure sensors and the alarm 600 as an audible and visual alarm, to illustrate the water ingress warning process for the motor of a water power device.

[0088] Under initial normal conditions, the first and second sealing rings 501 and 502 at the shaft port 402 are intact, the cavity between them is dry, and the internal air pressure is consistent with that of the first cavity 400. The first sensor 503 monitors the cavity pressure in real time, and the value is stable within the normal threshold range. The third and fourth sealing rings 504 and 505 at the cable port 403 are intact, the cavity between them is dry, and the pressure monitored by the second sensor 506 is also stable within the normal threshold range. The audible and visual alarm 600 is in standby mode with no alarm output.

[0089] Taking the failure of the second sealing ring 501 at the shaft port 402, which serves as the first level of sealing, as an example, if underwater impurities wear or age, causing the second sealing ring 502 to fail, external water will seep into the cavity between the two sealing rings through the gap in the shaft port 402. At this time: the water volume in the cavity increases, the pressure rises, and the first sensor 503 detects that the pressure value exceeds the normal threshold and immediately sends an electrical signal to the audible and visual alarm. Upon receiving the signal, the audible and visual alarm triggers (such as a flashing red warning light and a buzzer), indicating "first-level seal failure at the shaft port." At this time, the first sealing ring 501 (near the motor side) is still intact, preventing water from entering the first cavity 400 (motor cavity), and the motor 300 is temporarily unaffected. Operators can promptly stop the machine for inspection and repair based on the alarm, replacing the second sealing ring 502 to prevent the fault from escalating.

[0090] Taking the failure of the third sealing ring 504 at cable port 403, which serves as the first level of sealing, as an example, if cable vibration causes the third sealing ring 50 to fail, external water can seep into the cavity between the third and fourth sealing rings. At this time, the cavity pressure increases, and the second sensor 506 detects that the pressure exceeds the threshold, sending a signal to the audible and visual alarm. The audible and visual alarm triggers (e.g., a flashing yellow warning light and intermittent beeping), indicating "Cable port first-level seal failure." The fourth sealing ring 505 (near the motor side) remains intact, preventing water from entering the first cavity 400; the circuit safety of the motor 300 and motor controller 301 is temporarily unaffected. Operators can check the cable seal 407 based on the alarm and replace the third sealing ring 504.

[0091] It should be clarified that this process is only one possible example. In actual applications, the pressure threshold and alarm mode can be adjusted to suit different water depths (e.g., higher pressure thresholds are required for deep-sea operations) or equipment requirements (e.g., unmanned equipment can be linked to a remote communication module to send alarm information).

[0092] As can be seen, in this embodiment of the utility model, two levels of seals are respectively set at the shaft port 402 and the cable port 403 (the first level seal faces the outside directly, and the second level seal protects the inside). In conjunction with the pressure sensor, the pressure change between the two levels of seals is monitored in real time. When the first level seal fails and leaks water, the sensor triggers the audible and visual alarm to issue a differentiated alarm. This can provide timely warning and indicate the location of the fault when the second level seal is still effective, which is convenient for operators to carry out targeted maintenance. At the same time, the second level seal can temporarily prevent water from entering the motor 300 cavity, avoiding damage to the motor 300 and the motor controller 301 due to water ingress. This achieves the synergistic effect of "early warning - graded protection - precise maintenance", which greatly improves the operational safety and fault handling efficiency of the water power device.

[0093] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0095] In the several embodiments provided by this utility model, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0096] The unit described as a separate component may or may not be physically separate. The component shown as a unit may or may not be a physical unit. It may be located in one place or distributed across multiple network units.

[0097] Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0098] Furthermore, in the various embodiments of this utility model, the functional units can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0099] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A water-based power device, characterized in that, The aquatic power unit includes a housing, a motor, a torque output shaft, a first sensor, and a sealing device. The housing has a first cavity and a shaft port communicating with the first cavity. The motor is fixed in the first cavity. The torque output shaft is connected to the motor shaft and passes through the shaft port. The sealing device includes a first sealing ring and a second sealing ring disposed between the torque output shaft and the inner wall of the shaft port. The first sensor is fixed between the first sealing ring and the second sealing ring and is used to sense changes in the cavity air pressure between the first sealing ring and the second sealing ring.

2. The aquatic power device according to claim 1, characterized in that, The housing is also provided with a cable port communicating with the first cavity. The water power device also includes a cable seal and a second sensor. The cable seal cooperates with the cable port. The motor is provided with a cable passing through the cable seal. The sealing device includes a third sealing ring and a fourth sealing ring disposed between the cable seals. The second sensor is fixed between the third sealing ring and the fourth sealing ring and is used to sense the cavity air pressure change between the third sealing ring and the fourth sealing ring.

3. The aquatic power device according to claim 1, characterized in that, The aquatic power device also includes a third sensor fixed inside the first cavity, which is used to sense changes in air pressure inside the first cavity.

4. The aquatic power device according to claim 1, characterized in that, The housing includes a main housing and an end cap that covers the main housing. The first cavity is disposed in the main housing. One end of the end cap is fixedly connected to the main housing, and the other end protrudes relative to the main housing. The shaft port is disposed in the end cap. The water power device also includes a bearing fixed to the end cap and located in the first cavity. The bearing cooperates with the torque output shaft. The first sealing ring and the second sealing ring are located on the side of the bearing away from the motor.

5. The aquatic power device according to claim 4, characterized in that, The end cap includes a front cover that fits with the main shell and a rear cover that is fixed to the front cover. The front cover has a bearing groove, and the bearing is fixed in the bearing groove. The rear cover has a first sealing groove near the front cover and a second sealing groove away from the front cover, as well as a cavity located between the first sealing groove and the second sealing groove. The first sealing ring is fixed in the first sealing groove, the second sealing ring is fixed in the second sealing groove, and the first sensor is fixed in the cavity.

6. The aquatic power device according to claim 5, characterized in that, The rear cover is provided with a drainage channel communicating with the cavity, and a one-way valve disposed in the drainage channel. The one-way valve allows water in the cavity to be discharged through the drainage channel and prevents water outside the drainage channel from entering the cavity.

7. The aquatic power device according to claim 2, characterized in that, The aquatic power unit also includes an alarm that is electrically connected to the first sensor and the second sensor.

8. The aquatic power device according to claim 1, characterized in that, The water power device also includes a motor controller, which is fixed in the first cavity on the side away from the rotating shaft port and electrically connected to the motor.

9. The aquatic power device according to claim 1, characterized in that, The aquatic power unit includes a propeller connected to one end of the torque output shaft that passes through the shaft port.

10. A water propulsion device, characterized in that, The water propulsion device includes any one of claims 1 to 9, wherein the water propulsion device further includes a body connected to the housing and a bracket connected to the body, the bracket being used for connecting to a water carrier.

11. A water-based mobile device, characterized in that, It includes the water propulsion device as described in claim 10, and includes a water carrier.

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