Underwater propeller with drainage function
By designing an underwater thruster structure with automatic drainage, the problems of insufficient sealing and drainage in traditional underwater thrusters were solved, achieving the effects of automatic drainage and good sealing, thus ensuring the stable operation of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-11
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional underwater propulsion systems are inadequate in terms of sealing and drainage, especially in complex underwater environments where water can easily accumulate, leading to decreased motor insulation performance and equipment failure. Existing drainage solutions are unreliable and prone to clogging.
An underwater propulsion device with automatic drainage was designed. It adopts a motor assembly, housing and blade structure. The automatic drainage is achieved by the cooperation of the cover and the partition block through the drainage channel and the guide surface. Combined with the threaded groove design, it prevents the accumulation of mud and sand, and ensures the sealing and the stability of power transmission.
It enables automatic drainage without the need for an additional drive mechanism, improving drainage efficiency and response speed, preventing the accumulation of mud and sand, ensuring the cleanliness of the sealing surface, and enhancing the operational stability and reliability of the motor.
Smart Images
Figure CN121822781A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to an underwater propeller with drainage. BACKGROUND
[0002] The underwater propeller is the core power component of underwater vehicles, diving equipment and underwater operation platforms, and is long-term operated in complex underwater environment, so that the sealing and reliability are key technical challenges.
[0003] The traditional underwater propeller usually adopts a whole sealing shell to wrap the motor and transmission mechanism to prevent external water from entering; however, in actual use, due to the aging of the sealing element, the thermal expansion and cold contraction of the structural element or the pressure fluctuation caused by the change of the working depth, there is still a risk that a small amount of water seeps into the shell; once the internal water cannot be effectively drained, the insulation performance of the motor will be reduced, the bearing will be rusted, the components will be short-circuited and even the equipment will be disabled, and some existing drainage schemes, such as setting a one-way valve or a simple drainage hole, often have problems such as untimely drainage, uncontrollability, easy blockage by silt or reduced reliability caused by complex structure, so it is difficult to maintain the compactness of the propeller structure and the stability of the power transmission while ensuring efficient drainage.
[0004] Therefore, a new type of underwater propeller structure is urgently needed, which can not only efficiently and reliably drain the water seeping into the shell, but also effectively seal when drainage is not needed, and has good silt prevention capability to adapt to long-term and complex underwater working environment. SUMMARY
[0005] The application aims to provide an underwater propeller with drainage, which can automatically drain when manually lifted and moved after use, without the need for an additional driving mechanism, and has a simple and reliable structure.
[0006] The technical scheme for achieving the application is as follows: the application has a motor assembly, a shell and a paddle, the motor assembly is arranged in the interior of the shell and used to drive the shell to rotate, and the paddle is fixedly arranged outside the shell; the interior of the shell is hollow, the interior of the shell is fixedly provided with a partition block, a plurality of drainage grooves are arranged through the partition block, a first mounting groove and a second mounting groove are in communication through each drainage groove, and the interior of the shell is divided into the first mounting groove for mounting the motor assembly and the second mounting groove for drainage by the partition block; the motor assembly is arranged in the first mounting groove, the second mounting groove is provided with a groove opening in communication with the outside and used for drainage, and a cover body capable of closing or opening the groove opening of the second mounting groove is slidably arranged at the groove opening of the second mounting groove; when subjected to the water flow pressure outside the shell, the cover body closes the groove opening of the second mounting groove; and when subjected to the water flow pressure inside the shell, the cover body closes the groove opening of the second mounting groove.
[0007] Further, a plurality of drainage grooves are provided through the partition block, and the first mounting groove and the second mounting groove are in communication through the drainage grooves; the cover body comprises a main body and a plurality of extension rods fixedly arranged at one side of the main body, a sliding groove extending along the axis of the shell is arranged on the groove wall of the second mounting groove, a limiting block capable of being limitedly matched with one end of the sliding groove towards the second mounting groove is fixedly arranged at the other end of each extension rod; a limiting surface capable of being limitedly matched with the groove opening of the second mounting groove is arranged on the side of the main body and each extension rod in fixed connection; when the limiting block is limitedly matched with the sliding groove, the cover body is opened to the groove opening of the second mounting groove; when the limiting surface is limitedly matched with the groove opening of the second mounting groove and the limiting block is disengaged from the limiting match with the sliding groove, the cover body is closed to the groove opening of the second mounting groove.
[0008] Further, a protruding portion for guiding water in the first mounting groove into the second mounting groove is arranged at one side of the partition block towards the first mounting groove, the center of the protruding portion extends towards the interior of the first mounting groove, the edge of the protruding portion extends towards the drainage groove, a guiding surface for guiding water flow is formed between the center of the protruding portion and the edge of the protruding portion, and the water in the first mounting groove flows into the second mounting groove through the guidance of the guiding surface.
[0009] Further, a guiding ring surface for guiding water flow towards the protruding portion is arranged in the interior of the first mounting groove, the upper end of the guiding ring surface extends towards the groove wall of the first mounting groove, and the lower end of the guiding ring surface extends towards the partition block, so that the water flow in the first mounting groove flows towards the partition block through the guidance of the guiding ring surface.
[0010] Further, a guiding channel for guiding water flow in the first mounting groove towards the limiting surface is further arranged on the side of the main body and each extension rod in fixed connection, each extension rod is correspondingly provided with one of the guiding channels, the two ends of the guiding channel are arranged at the two sides of the extension rod respectively, and the middle part of the guiding channel extends towards the axis of the main body; the two adjacent guiding channels are in communication, and the water flow in the interior of the first mounting groove flows towards the limiting surface through the guidance of the guiding channel.
[0011] Further, the motor assembly comprises a stator, a stator support, a rotor, an output shaft and an end cover, the stator support is arranged in the first mounting groove, one end of the stator support is arranged towards the partition block, the other end of the stator support is arranged towards the outside, one end of the output shaft is fixedly arranged on the partition block, the other end of the output shaft is rotatably arranged on the stator support, the stator is fixedly sleeved on the stator support, the rotor is fixedly arranged on the groove wall of the first mounting groove, and the end cover is fixedly arranged on the end of the stator support towards the outside; the shell is rotatably arranged through the rotation of the output shaft on the stator support.
[0012] Furthermore, a sleeve extending circumferentially around the axial direction of the first mounting groove is fixedly provided on the groove wall of the first mounting groove, and an installation space for mounting the rotor is formed between the sleeve and the groove wall of the first mounting groove, and the rotor is fixedly installed in the installation space.
[0013] Furthermore, the stator support is provided with an extension column extending toward the partition block. The extension column has grooves at both its end toward the partition block and its end away from the partition block. A rotating channel, extending along the extension column's direction and allowing the output shaft to rotate within it, is also provided through the extension column. A support block, coaxially aligned with the rotating channel, is fixedly installed at the groove opening of the extension column's end toward the partition block. A rotating hole, coaxially aligned with the rotating channel and allowing the output shaft to pass through, is provided through the support block. The output shaft, after passing through the rotating hole, is rotatably mounted within the rotating channel and extends into the groove at the extension column's end away from the partition block. A retaining spring limits the end of the output shaft extending into the groove at the extension column's end away from the partition block. A threaded portion is provided on the portion of the output shaft located in the rotating hole to guide sediment out of the groove at the extension column's end toward the partition block.
[0014] Furthermore, the threaded portion includes a first threaded groove and a second threaded groove. The first threaded groove is wound clockwise around the output shaft along the extension direction of the output shaft, and the second threaded groove is wound counterclockwise around the output shaft along the extension direction of the output shaft. The first threaded groove and the second threaded groove are arranged in an intersecting manner and are interconnected at the intersection. A first sand discharge channel for mud and sand to pass through is formed between the inner wall of the first threaded groove and the wall of the rotating hole, and a second sand discharge channel for mud and sand to pass through is formed between the inner wall of the second threaded groove and the wall of the rotating hole. The first sand discharge channel and the second sand discharge channel are interconnected at the intersection of the first threaded groove and the second threaded groove.
[0015] Furthermore, a glue-filling space a is formed between the sleeve, the wall of the first mounting groove, and the rotor for glue filling. The sleeve is fixedly connected to the wall of the first mounting groove and the rotor by glue filling in the glue-filling space a.
[0016] The present invention has the following positive effects: (1) The second mounting groove of the present invention is slidably provided with a cover that can close or open the groove of the second mounting groove. When the limiting block and the sliding groove form a limiting fit, the cover opens the groove of the second mounting groove; when the limiting surface and the groove of the second mounting groove form a limiting fit and the limiting block and the sliding groove are disengaged from the limiting fit, the cover closes the groove of the second mounting groove; when the cover faces the water flow, the cover closes the second mounting groove under the thrust of the water flow; after the underwater thruster is used up, the cover opens the second mounting groove under the action of gravity, and the water inside flows out in the second mounting groove; it can automatically drain water when manually lifted and moved after use, without the need for an additional driving mechanism, and the structure is simple and reliable.
[0017] (2) The partition block of the present invention has a protrusion with a guide surface on the side facing the second mounting groove. The protrusion can efficiently guide the water flow collected in the second mounting groove to each drainage groove through the guide surface, accelerate the transfer of water from the second mounting groove to the first mounting groove, and improve drainage efficiency and response speed.
[0018] (3) The second mounting groove of the present invention is provided with a guide ring surface for guiding water flow toward the protrusion. The upper end of the guide ring surface extends toward the groove wall of the second mounting groove, and the lower end of the guide ring surface extends toward the partition block. The guide ring surface can effectively guide the water flow that is about to enter the second mounting groove in the first mounting groove to gather toward the partition block, avoid water from being stuck in the drainage groove in a disorderly manner, ensure that the water can be smoothly guided to the drainage groove, and create favorable conditions for subsequent discharge.
[0019] (4) The main body of the present invention is fixedly connected to each of the extension rods on one side, and a guide channel is provided for guiding the water flow in the first mounting groove to the limiting surface. Each extension rod is provided with the aforementioned guide channel. The two ends of the guide channel are respectively set on both sides of the extension rod, and the middle part of the guide channel extends toward the axis of the main body. When the propeller is working, the water flow dynamics effect inside the shell can be used to actively guide the water flow through the guide channel to flush the limiting surface area of the cover, prevent the accumulation of mud or microorganisms in the area, keep the sealing surface clean, and ensure that the cover can achieve effective sealing when it needs to be closed.
[0020] (5) The motor assembly of the present invention adopts an external rotor structure design with a stator bracket fixed and a rotor connected to the housing and rotating with it. One end of the output shaft is fixed to the partition block, and the other end is rotatably mounted on the stator bracket. The structure is stable, so that the torque generated by the motor directly drives the housing to rotate. The power transmission path is simple and efficient, and at the same time, it provides a stable central support for the arrangement of the internal drainage structure.
[0021] (6) A sleeve extending circumferentially around the axial direction of the second mounting groove is fixedly provided on the groove wall of the second mounting groove of the present invention. An installation space for mounting the rotor is formed between the sleeve and the groove wall of the second mounting groove. The rotor is fixedly installed in the installation space, which makes the installation and positioning of the rotor more accurate and firm, which helps to ensure the uniformity of the air gap and improve the efficiency and smoothness of the motor. At the same time, the sleeve can prevent sand and gravel in the water flow from causing wear on the rotor when the water flows through the air gap.
[0022] (7) The stator support of the present invention has grooves at both ends of the extension column, and the output shaft is axially limited and radially supported by the support block and the snap ring; in particular, a threaded part is provided in the part of the output shaft located in the rotating hole. When the output shaft rotates, the threaded part can be like a screw pump to rotate out the mud and sand that may enter the groove along the thread groove, effectively preventing the mud and sand from accumulating in the key rotating parts and avoiding aggravated wear or jamming.
[0023] (8) The threaded part of the present invention adopts a double thread design with a clockwise first thread groove and a counterclockwise second thread groove interlaced. Regardless of whether the shell rotates forward or backward, at least one thread groove can play an effective sand discharge role. The double thread grooves are interconnected to form a more complex sand discharge channel network, which enhances the ability to agitate and discharge mud and sand under different rotation directions, and the anti-clogging effect is better.
[0024] (9) The glue-filling space formed between the rotor, the sleeve and the wall of the second mounting groove of the present invention can achieve simultaneous fixation and sealing between multiple components by injecting sealant. This process not only has high connection strength and can effectively transmit torque, but also fills micro gaps, achieves excellent waterproof sealing effect, and enhances the rigidity and vibration resistance of the overall structure. Attached Figure Description
[0025] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein... Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side sectional view of the present invention; Figure 3 This is a schematic diagram of the threaded portion of the present invention; Figure 4 This is a schematic diagram of the structure of the cover of the present invention; Figure 5 This is a schematic diagram of the structure of the motor assembly of the present invention; Figure 6 This is a side sectional view of the outer casing of the present invention.
[0026] In the figure, motor assembly: 1, stator: 11, stator bracket: 12, extension column: 121, groove: 1211, rotation channel: 1212, support block: 1213, rotor: 13, output shaft: 14, end cover: 15, housing: 2, first mounting groove: 21, second mounting groove: 22, guide ring surface: 221, blade: 3, partition block: 4, drainage groove: 41, protrusion: 42, guide surface: 421, mounting hole: 43, cover: 5, main body: 51, guide channel: 511, extension rod: 52, sliding groove: 6, limiting block: 7, limiting surface: 8, sleeve: 9, threaded part: 10, first threaded groove: 101, second threaded groove: 102, potting space: a. Detailed Implementation
[0027] See Figures 1 to 6 The present invention comprises a motor assembly 1, a housing 2, and a blade 3. The motor assembly 1 is disposed inside the housing 2 and is used to drive the housing 2 to rotate. The blade 3 is fixedly disposed outside the housing 2. The housing 2 is hollow inside, and a partition block 4 is fixedly disposed inside the housing 2. Multiple drainage grooves 41 are provided through the partition block 4. A first mounting groove 21 and a second mounting groove 22 are connected through the drainage grooves 41. The interior of the housing 2 is divided by the partition block 4 into a first mounting groove 21 for mounting the motor assembly 1 and a second mounting groove 22 for drainage. The motor assembly 1 is disposed in the first mounting groove 21. The second mounting groove 22 has a groove opening that communicates with the outside and is used for drainage. A cover 5 is slidably disposed at the groove opening of the second mounting groove 22, which can be closed or opened. When subjected to water flow pressure from outside the housing 2, the cover 5 closes the groove opening of the second mounting groove 22. When subjected to water flow pressure from inside the housing 2, the cover 5 closes the groove opening of the second mounting groove 22.
[0028] The shell 2 is an axisymmetric rotating body structure, preferably made of corrosion-resistant metal materials such as stainless steel, aluminum alloy or high-strength engineering plastics such as glass fiber reinforced nylon. The wall thickness of the shell 2 is designed for strength according to the working water depth and pressure, and is usually 2-10mm.
[0029] Multiple drainage grooves 41 are provided through the partition block 4, and the first mounting groove 21 and the second mounting groove 22 are connected through the drainage grooves 41. The cover 5 includes a main body 51 and multiple extension rods 52 fixed at one end on one side of the main body 51. The groove wall of the second mounting groove 22 is provided with a sliding groove 6 extending along the axis of the housing 2. The other end of each extension rod 52 is fixed with a limiting block 7 that can form a limiting fit with the end of the sliding groove 6 facing the second mounting groove 22. The side of the main body 51 that is fixedly connected to each extension rod 52 is provided with a limiting surface 8 that can form a limiting fit with the opening of the second mounting groove 22. When the limiting block 7 forms a limiting fit with the sliding groove 6, the cover 5 opens the opening of the second mounting groove 22. When the limiting surface 8 forms a limiting fit with the opening of the second mounting groove 22 and the limiting block 7 disengages from the sliding groove 6, the cover 5 closes the opening of the second mounting groove 22.
[0030] The partition block 4 is integrally formed with the shell 2 or fixed to the middle of the inner cavity of the shell 2 by welding, sealing adhesive or other means. The partition block 4 divides the inner cavity of the shell 2 into a first mounting groove 21 and a second mounting groove 22 that are independent of each other along the axial direction. The side surface of the partition block 4 that is close to the first mounting groove 21 is called the inner side surface, and the side surface that is close to the second mounting groove 22 is called the outer side surface.
[0031] The main body 51 of the cover 5 is a disc-shaped or plate-shaped structure that matches the shape of the second mounting groove 22. The extension rods 52 are cylindrical or rectangular rods, and their number is consistent with the number of drainage grooves 41, usually 3-6, and they are evenly distributed along the circumference.
[0032] The sliding groove 6 is formed inside the side wall of the first mounting groove 21, and its length direction is parallel to the axis of the housing 2. The cross-sectional shape of the sliding groove 6 matches the extension rod 52, allowing the extension rod 52 and the limiting block 7 to slide inside.
[0033] The limiting surface 8 is the end face of the main body 51 facing the groove opening of the second mounting groove 22. When the cover 5 is closed, the limiting surface 8 is pressed against the groove opening end face of the second mounting groove 22 under the action of external water pressure or its own weight. A sealing ring can be further provided to achieve a more reliable seal. The sealing ring can be of the type such as an O-ring.
[0034] The partition block 4 has a protrusion 42 on the side facing the first mounting groove 21 for guiding water in the first mounting groove 21 into the second mounting groove 22. The center of the protrusion 42 extends toward the interior of the first mounting groove 21, and the edge of the protrusion 42 extends toward the drain groove 41. A guiding surface 421 for guiding water flow is formed between the center of the protrusion 42 and the edge of the protrusion 42. Water in the first mounting groove 21 enters the second mounting groove 22 through the guidance of the guiding surface 421.
[0035] The first mounting groove 21 is provided with a guide ring surface 221 for guiding water flow toward the protrusion 42. The upper end of the guide ring surface 221 extends toward the groove wall of the first mounting groove 21, and the lower end of the guide ring surface 221 extends toward the partition block 4. The water flow in the first mounting groove 21 flows toward the partition block 4 through the guidance of the guide ring surface 221.
[0036] On the side where the main body 51 is fixedly connected to each extension rod 52, there is also a guide channel 511 for guiding the water flow in the first mounting groove 21 to the limiting surface 8. Each extension rod 52 is provided with a corresponding guide channel 511. The two ends of the guide channel 511 are respectively provided on both sides of the extension rod 52, and the middle part of the guide channel 511 extends toward the axis of the main body 51. Two adjacent guide channels 511 are connected, and the water flow inside the first mounting groove 21 flows toward the limiting surface 8 through the guiding effect of the guide channel 511.
[0037] The guide channel 511 is formed on the surface of the main body 51 of the cover 5 and the extension rod 52. It is a groove 1211 or channel connecting both sides of the extension rod 52. The adjacent guide channels 511 are connected to each other to form a ring-shaped flow channel network around the center. The cross-section of the guide channel 511 can be arc-shaped, V-shaped or rectangular. The depth and width are usually 0.5-3mm to ensure sufficient flow guiding capacity without affecting the structural strength.
[0038] The motor assembly 1 includes a stator 11, a stator support 12, a rotor 13, an output shaft 14, and an end cover 15. The stator support 12 is disposed in the first mounting groove 21, with one end of the stator support 12 facing the partition block 4 and the other end facing outward. One end of the output shaft 14 is fixedly disposed on the partition block 4, and the other end of the output shaft 14 is rotatably disposed on the stator support 12. The stator 11 is fixedly sleeved on the stator support 12, and the rotor 13 is fixedly disposed on the groove wall of the first mounting groove 21. The end cover 15 is fixedly disposed on the outward-facing end of the stator support 12. The housing 2 rotates by the rotation of the output shaft 14 on the stator support 12.
[0039] A sleeve 9 is fixedly provided on the wall of the first mounting groove 21, extending circumferentially with the axial direction of the first mounting groove 21 as the center. An installation space for mounting the rotor 13 is formed between the sleeve 9 and the wall of the first mounting groove 21. The rotor 13 is fixedly installed in the installation space.
[0040] The stator support 12 is provided with an extension column 121 extending toward the partition block 4. The extension column 121 has grooves 1211 on both its end facing the partition block 4 and its end away from the partition block 4. A rotation channel 1212, extending along the extension direction of the extension column 121 and allowing the output shaft 14 to rotate within it, is also provided through the extension column 121. A support block 1213, coaxially arranged with the rotation channel 1212, is fixedly installed at the groove 1211 at the end of the extension column 121 facing the partition block 4. A support block 1213, coaxial with the rotation channel, is provided through the support block 1213. A rotating hole coaxially arranged in 1212 allows the output shaft 14 to pass through. After passing through the rotating hole, the output shaft 14 is rotatably disposed in the rotating channel 1212 and extends into the groove 1211 on the end of the extension column 121 away from the separator block 4. The end of the output shaft 14 extending into the groove 1211 on the extension column 121 away from the separator block 4 is limited by a retaining spring. The portion of the output shaft 14 located in the rotating hole is provided with a threaded portion 10 for guiding mud and sand to be discharged from the groove 1211 on the end of the extension column 121 toward the separator block 4.
[0041] The partition block 4 is provided with mounting holes 43 for fixing the output shaft 14.
[0042] The threaded portion 10 includes a first threaded groove 101 and a second threaded groove 102. The first threaded groove 101 is wound clockwise around the output shaft 14 along the extension direction of the output shaft 14, and the second threaded groove 102 is wound counterclockwise around the output shaft 14 along the extension direction of the output shaft 14. The first threaded groove 101 and the second threaded groove 102 are arranged to cross each other and are interconnected at the intersection. A first sand discharge channel for mud and sand to pass through is formed between the inner wall of the first threaded groove 101 and the wall of the rotating hole, and a second sand discharge channel for mud and sand to pass through is formed between the inner wall of the second threaded groove 102 and the wall of the rotating hole. The first sand discharge channel and the second sand discharge channel are interconnected at the intersection of the first threaded groove 101 and the second threaded groove 102.
[0043] The sleeve 9, the groove wall of the first mounting groove 21 and the rotor 13 form a glue-filling space a for glue filling. The sleeve 9 is glued through the glue-filling space a and forms a fixed connection with the groove wall of the first mounting groove 21 and the rotor 13.
[0044] The sleeve 9 is a thin-walled metal cylinder, and a 0.5-2mm annular gap is reserved between its outer wall and the wall of the second mounting groove 22 as the potting space a; the potting material is thermally conductive and insulating epoxy resin, which is cured after potting, firmly bonding the sleeve 9, the rotor 13 magnet and the housing 2 into one, while realizing the waterproofing, fixing and heat dissipation of the rotor 13.
[0045] The working principle of this invention is as follows: After the motor is powered on, the stator 11 generates a rotating magnetic field, which drives the rotor 13, which is fixedly connected to the housing 2, to rotate, thereby driving the entire housing 2 and the blades 3 fixed to its outside to rotate, generating thrust. The output shaft 14, fixed to the partition block 4, rotates relative to the rotation channel 1212 of the stator support 12, providing stable support. During this process, the first threaded groove 101 and the second threaded groove 102 on the output shaft 14 form a dynamic sand discharge channel with the inner wall of the rotation hole on the support block 1213, continuously rotating out any fine sand particles that may intrude, keeping the rotating pair clean. When the blade 3 rotates, the cover 5 faces the water flow. Under the thrust of the water flow and possibly some centrifugal force, the limiting surface 8 of the cover 5 tightly fits the groove, thus closing the second mounting groove 22. At this time, the limiting surface 8 is pushed by the water flow to contact the groove opening of the second mounting groove 22, sealing the groove opening and preventing backflow of external water or the entry of foreign objects. After use, the invention is inverted. The cover 5 then slides under the action of gravity. When the limiting block 7 and the sliding groove 6 form a limiting engagement, the cover 5 closes the second mounting groove 22. When the opening of the groove 22 is fully open, the water inside the first mounting groove 21 enters the drainage groove 41 under the guidance of the guide ring surface 221 and the protrusion 42. The water then enters the second mounting groove 22 through the drainage groove 41 and flows out from the opening of the second mounting groove 22. During the process of the water flowing out of the second mounting groove 22, the water will flush the limiting surface 8 area of the cover 5 under the guidance of the guide channel 511 to prevent the accumulation of mud or microorganisms in this area, keep the sealing surface clean, and ensure that the cover 5 can achieve effective sealing when it needs to be closed.
[0046] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An underwater propulsion device with drainage, comprising a motor assembly (1), a housing (2), and blades (3), wherein the motor assembly (1) is disposed inside the housing (2) and is used to drive the housing (2) to rotate, and the blades (3) are fixedly disposed outside the housing (2); characterized in that: The inside of the shell (2) is hollow, the inside of the shell (2) is fixedly provided with a partition block (4), a plurality of drainage grooves (41) are provided on the partition block (4), the first mounting groove (21) and the second mounting groove (22) are communicated through each drainage groove (41), the inside of the shell (2) is divided into the first mounting groove (21) for mounting the motor assembly (1) and the second mounting groove (22) for drainage by the partition block (4); the motor assembly (1) is arranged in the first mounting groove (21), the second mounting groove (22) is provided with a slot opening to the outside and for drainage, and the cover (5) for closing or opening the slot opening of the second mounting groove (22) is slidably arranged at the slot opening of the second mounting groove (22); when subjected to the water flow pressure outside the shell (2), the cover (5) closes the slot opening of the second mounting groove (22); when subjected to the water flow pressure inside the shell (2), the cover (5) closes the slot opening of the second mounting groove (22).
2. An underwater propeller with drainage according to claim 1, characterized in that: The plurality of drainage grooves (41) are provided on the partition block (4), the first mounting groove (21) and the second mounting groove (22) are communicated through each drainage groove (41); the cover (5) comprises a main body (51) and a plurality of extension rods (52) fixedly arranged at one side of the main body (51), the slot wall of the second mounting groove (22) is provided with a sliding groove (6) extending along the axis direction of the shell (2), the other end of each extension rod (52) is fixedly provided with a limiting block (7) capable of being limitedly matched with one end of the sliding groove (6) towards the second mounting groove (22); the side of the main body (51) and each extension rod (52) forming fixed connection is provided with a limiting surface (8) capable of being limitedly matched with the slot opening of the second mounting groove (22); when the limiting block (7) is limitedly matched with the sliding groove (6), the cover (5) opens the slot opening of the second mounting groove (22); when the limiting surface (8) is limitedly matched with the slot opening of the second mounting groove (22) and the limiting block (7) is disengaged from the limiting matching with the sliding groove (6), the cover (5) closes the slot opening of the second mounting groove (22).
3. An underwater propeller with drainage according to claim 1, characterized in that: The side of the partition block (4) towards the first mounting groove (21) is provided with a protruding portion (42) for guiding the water in the first mounting groove (21) into the second mounting groove (22), the center of the protruding portion (42) extends towards the inside of the first mounting groove (21), the edge of the protruding portion (42) extends towards the drainage groove (41), the center of the protruding portion (42) and the edge of the protruding portion (42) form a guide surface (421) for guiding water flow, and the water in the first mounting groove (21) enters the second mounting groove (22) through the guidance of the guide surface (421).
4. An underwater propeller with drainage according to claim 1, characterized in that: The first installation slot (21) is internally provided with a guide ring surface (221) for guiding water flow towards the protruding part (42), the upper end of the guide ring surface (221) extends towards the slot wall of the first installation slot (21), and the lower end of the guide ring surface (221) extends towards the partition block (4), and the water flow in the first installation slot (21) is guided towards the partition block (4) by the guide ring surface (221).
5. An underwater propeller with drainage according to claim 1, characterized in that: The main body (51) is further provided with a guide channel (511) on the side where the extension rod (52) is fixedly connected, which is used to guide the water flow in the first installation slot (21) to the limiting surface (8), each extension rod (52) is provided with one guide channel (511), the two ends of the guide channel (511) are arranged on the two sides of the extension rod (52), and the middle part of the guide channel (511) extends towards the axis of the main body (51); the two guide channels (511) are arranged in communication, and the water flow in the first installation slot (21) flows towards the limiting surface (8) by the guiding action of the guide channel (511).
6. An underwater propulsor with drainage according to claim 1, characterized in that: The motor assembly (1) comprises a stator (11), a stator support (12), a rotor (13), an output shaft (14) and an end cover (15), the stator support (12) is arranged in the first installation slot (21), one end of the stator support (12) is arranged towards the partition block (4), the other end of the stator support (12) is arranged towards the outside, one end of the output shaft (14) is fixedly arranged on the partition block (4), the other end of the output shaft (14) is rotatably arranged on the stator support (12), the stator (11) is fixedly arranged on the stator support (12), the rotor (13) is fixedly arranged on the slot wall of the first installation slot (21), and the end cover (15) is fixedly arranged on the end of the stator support (12) towards the outside; the housing (2) is rotatably arranged on the stator support (12) through the output shaft (14).
7. An underwater propeller with drainage according to claim 6, characterized in that: The slot wall of the first installation slot (21) is fixedly provided with a sleeve (9) extending in the circumferential direction with the axial direction of the first installation slot (21) as the center, the sleeve (9) and the slot wall of the first installation slot (21) form an installation space for installing the rotor (13), and the rotor (13) is fixedly arranged in the installation space.
8. An underwater propeller with drainage according to claim 6, characterized in that: The stator support (12) is provided with an extension column (121) extending towards the partition block (4), recesses (1211) are arranged on the end of the extension column (121) towards the partition block (4) and the end of the extension column (121) away from the partition block (4), and a rotating channel (1212) is arranged through the extension column (121) and can be used for the rotation of the output shaft (14) in the extension direction of the extension column (121); the slot of the recess (1211) on the end of the extension column (121) towards the partition block (4) is fixedly provided with a support block (1213) coaxially arranged with the rotating channel (1212), a rotating hole coaxially arranged with the rotating channel (1212) and through which the output shaft (14) can pass is arranged through the support block (1213), the output shaft (14) is rotatably arranged in the rotating channel (1212) after passing through the rotating hole and extends into the recess (1211) on the end of the extension column (121) away from the partition block (4), and the end of the output shaft (14) extending into the recess (1211) of the extension column (121) away from the partition block (4) is limited by a snap spring; the part of the output shaft (14) located in the rotating hole is provided with a threaded portion (10) for guiding the discharge of silt from the recess (1211) on the end of the extension column (121) towards the partition block (4).
9. An underwater propeller with drainage according to claim 8, characterized in that: The threaded portion (10) comprises a first threaded groove (101) and a second threaded groove (102), the first threaded groove (101) is wound clockwise on the output shaft (14) along the extension direction of the output shaft (14), the second threaded groove (102) is wound counterclockwise on the output shaft (14) along the extension direction of the output shaft (14), the first threaded groove (101) and the second threaded groove (102) are arranged in a cross manner, and the first threaded groove (101) and the second threaded groove (102) are in communication at the cross position; a first silt discharge channel is formed between the inner wall of the first threaded groove (101) and the hole wall of the rotating hole, a second silt discharge channel is formed between the inner wall of the second threaded groove (102) and the hole wall of the rotating hole, and the first silt discharge channel and the second silt discharge channel are in communication at the cross position of the first threaded groove (101) and the second threaded groove (102).
10. An underwater propeller with drainage according to claim 7, characterized in that: The sleeve (9), the groove wall of the first mounting groove (21) and the rotor (13) form a glue filling space (a) for glue filling, and the sleeve (9) is fixedly connected with the groove wall of the first mounting groove (21) and the rotor (13) by glue filling in the glue filling space (a).