Low-speed submersible motor watertight structure for cleaning underwater transducer

Through the combined design of the skeleton sealing ring and multiple sealing ring, combined with the deposition space and Hall PCB board detection, the problem of complex structure and easy to be eroded by sand and gravel is solved, and the low-cost and high-reliability seal of low-speed submersible motors in underwater transducer cleaning is achieved.

CN223270617UActive Publication Date: 2025-08-26长三角国创超声(上海)有限公司
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Patent Information

Application Number
CN202422401185.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2025-08-26
Estimated Expiration
2034-09-30

AI Technical Summary

Technical Problem

Traditional submersible motors have complex watertight structures, high cost, and are easily eroded by sand and gravel, which cannot meet the needs of low-speed submersible motors to clean underwater transducers.

Method used

Multiple waterproofing methods of skeleton sealing ring, inner O-ring and outer O-ring are adopted, combined with the deposition space design, simple assembly and low-cost sealing of low-speed submersible motors are realized, and the motor status is detected through Hall PCB boards to monitor water leakage.

Benefits of technology

It realizes effective sealing of low-speed submersible motors in underwater transducer cleaning scenarios, reduces costs, improves seal reliability, slows down sand and gravel erosion, and simplifies the assembly process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a watertight structure of a low-speed submersible motor for cleaning an underwater transducer. The watertight structure of the low-speed submersible motor comprises an inner O-shaped sealing ring, an outer O-shaped sealing ring and an outer O-shaped sealing ring, the inner diameter of the end socket is sleeved on the circumference of a shaft body of the low-speed submersible motor, the outer diameter of the end socket is coupled with the inner diameter of a shell of the low-speed submersible motor, and the end socket and the inner O-shaped sealing ring form sealing at a circumferential concave part of the shaft body of the low-speed submersible motor; the outer O-shaped sealing ring is sleeved on the circumferential concave part of the sealing head, and the outer O-shaped sealing ring on the circumferential concave part of the sealing head and a shell of the low-speed submersible motor are sealed; the tail end of the sealing head is provided with a hollow part surrounding the low-speed submersible motor shaft body, a framework sealing ring matched with the hollow part in size is arranged in the hollow part, and the inner diameter of the framework sealing ring is tightly arranged on the low-speed submersible motor shaft body in a sleeving mode. Multiple waterproof means of the framework sealing ring and the inner O-shaped sealing ring are adopted in the direction of the shaft body of the low-speed submersible motor, so that the low-speed submersible motor for cleaning the underwater transducer can be effectively sealed, the assembly is simple, and the cost is low.
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Description

Technical Field

[0001] The utility model belongs to the technical field of motor sealing, and in particular relates to a watertight structure of a low-speed submersible motor used for cleaning underwater transducers. Background Art

[0002] The watertight structure of traditional submersible motors is suitable for high-speed motors. Its structure is complex and must be sealed with a dedicated mechanical seal structure. The structure has high cost and high assembly precision, and the sealing surface is easily eroded by sand and gravel.

[0003] The application scenario of this utility model is to clean underwater transducers. A low-speed motor can be used, without the need for high-speed and long-term rotation, and without the need for high-precision assembly. Therefore, due to cost, performance, and assembly considerations, there is an urgent need for a low-cost, low-speed, mud-proof, and easy-to-install underwater transducer submersible cleaning motor structure that can be used in conjunction with the self-cleaning transducer device. Utility Model Content

[0004] To address these issues, the present invention proposes a watertight structure for a low-speed submersible motor used for underwater transducer cleaning. This structure utilizes multiple waterproofing measures, including a skeleton sealing ring and an inner O-ring. This structure effectively seals the low-speed submersible motor used for underwater transducer cleaning, while also simplifying assembly and reducing costs. The skeleton sealing ring comprises a first sealing portion and a second sealing portion, further enhancing the sealing area through multiple layers and improving sealing reliability. Furthermore, a sedimentation space is provided between the inner and outer rings to further mitigate sand and gravel intrusion.

[0005] The utility model provides a watertight structure of a low-speed submersible motor for cleaning an underwater transducer, comprising:

[0006] An inner O-shaped sealing ring sleeved on the circumferential recessed portion of the low-speed submersible motor shaft;

[0007] A head with an inner diameter sleeved on the circumference of the low-speed submersible motor shaft and an outer diameter coupled to the inner diameter of the housing of the low-speed submersible motor, wherein the head forms a seal with the inner O-ring in a recessed portion on the circumference of the low-speed submersible motor shaft;

[0008] An external O-shaped sealing ring is sleeved on the circumferential recessed portion of the head, wherein the external O-shaped sealing ring forms a seal with the housing of the low-speed submersible motor at the circumferential recessed portion of the head;

[0009] The end of the head is provided with a hollow portion surrounding the low-speed submersible motor shaft, and a skeleton sealing ring with matching size is arranged in the hollow portion. The inner diameter of the skeleton sealing ring is tightly sleeved on the low-speed submersible motor shaft.

[0010] Preferably, the skeleton sealing ring has an inner ring and an outer ring connected thereto, the first end of the inner ring is provided with a first sealing portion, the second end of the inner ring is provided with a second sealing portion, the first sealing portion and the second sealing portion respectively protrude inward from the inner ring and tightly abut against the low-speed submersible motor shaft.

[0011] Preferably, the inner ring and the outer ring are connected by a connecting portion at the first end of the skeleton sealing ring, and a sedimentation space is provided between the inner ring and the outer ring. When a small amount of mud and sand passes through the first sealing portion and the second sealing portion, it is deposited in the sedimentation space.

[0012] Preferably, the outer end surface of the skeleton sealing ring connecting portion is provided with a wedge surface, and the angle formed by the wedge surface and the sealing surface of the first sealing portion in the counterclockwise direction is less than 180°.

[0013] Preferably, the inner O-ring and the outer O-ring are made of elastic sealing material.

[0014] Preferably, the low-speed submersible motor shaft is circumferentially provided with two recessed portions and two corresponding inner O-rings.

[0015] Preferably, the head is circumferentially provided with two recessed portions and two corresponding external O-rings.

[0016] Preferably, a magnetic steel mounting plate is fixedly provided on the inner side of the head, and a magnetic steel is provided on the magnetic steel mounting plate, and the low-speed operation state of the motor is detected through the Hall element on the Hall PCB board.

[0017] Preferably, the Hall PCB board is further provided with a leakage detection unit to monitor water leakage inside the motor.

[0018] Preferably, the shaft of the low-speed submersible motor is sleeved with a bearing, and the inner diameter of the head is fixedly connected to the outer ring of the bearing.

[0019] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0020] The low-speed submersible motor utilizes multiple waterproofing measures, including a skeleton seal ring and an inner O-ring, along the motor shaft. This effectively seals the motor in applications requiring underwater transducer cleaning, while simplifying assembly and reducing costs. The skeleton seal ring comprises a first sealing portion and a second sealing portion, further enhancing the sealing reliability by creating a multi-layered sealing area. Furthermore, a sedimentation space is provided between the inner and outer rings to further mitigate sand and gravel intrusion. If a small amount of sediment breaks through the second sealing portion, the sedimentation space provides a buffer zone, slowing further erosion of the inner O-ring seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of the watertight structure of the low-speed submersible motor used for underwater transducer cleaning of the utility model;

[0023] Figure 2 This is a cross-sectional view of the watertight structure of a low-speed submersible motor for underwater transducer cleaning according to the present invention;

[0024] Figure 3 This is a schematic diagram of the Hall PCB board structure of this utility model.

[0025] Description of reference numerals:

[0026] 1-housing; 2-shaft; 3-skeleton sealing ring; 4-head; 5-first inner O-ring; 6-second inner O-ring; 7-bearing; 8-first outer O-ring; 9-second outer O-ring; 10-bearing baffle; 11-magnetic steel mounting plate; 12-circlip; 13-Hall PCB board; 14-motor mounting plate; 15-end face fixing plate; 16-leakage detection unit. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact ratios, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] Example 1

[0030] The utility model provides a watertight structure of a low-speed submersible motor for cleaning an underwater transducer, comprising:

[0031] An inner O-shaped sealing ring sleeved on the circumferential recessed portion of the low-speed submersible motor shaft 2;

[0032] A head 4 with an inner diameter sleeved on the circumference of the low-speed submersible motor shaft 2 and an outer diameter coupled to the inner diameter of the housing 1 of the low-speed submersible motor, wherein the head 4 forms a seal with the inner O-ring in the circumferential recess of the low-speed submersible motor shaft 2;

[0033] An external O-ring is sleeved on the circumferential recessed portion of the head 4, where the external O-ring forms a seal with the housing 1 of the low-speed submersible motor at the circumferential recessed portion of the head 4;

[0034] The end of the head 4 is provided with a hollow portion surrounding the low-speed submersible motor shaft 2, and a skeleton sealing ring 3 of matching size is arranged in the hollow portion. The inner diameter of the skeleton sealing ring 3 is tightly fitted on the low-speed submersible motor shaft 2.

[0035] The technical solution of this embodiment employs multiple waterproofing measures, including a skeleton seal ring 3 and an internal O-ring, on the low-speed submersible motor shaft 2. This effectively achieves sealing in low-speed submersible motor applications, such as cleaning underwater transducers. Assembly is simple and cost-effective. The head 4 is connected to the low-speed submersible motor shaft 2 via a bearing 7. A bearing baffle 10 is provided at the end of the bearing 7 facing away from the head 4 to secure the axial position of the bearing 7. The head 4 is fixedly connected to the outer ring of the bearing 7, and the low-speed submersible motor shaft 2 is fixedly connected to the inner ring of the bearing 7, thereby achieving a stable connection of the overall watertight structure. Within the motor housing 1, the motor body is fixedly connected to the housing 1 via a motor mounting plate 14. At the end of the housing 1 near the end of the head 4, an end face fixing plate 15 seals all components of the above watertight structure within the housing 1.

[0036] Preferably, the skeleton sealing ring 3 has an inner ring and an outer ring connected thereto, the first end of the inner ring is provided with a first sealing portion, the second end of the inner ring is provided with a second sealing portion, the first sealing portion and the second sealing portion respectively protrude inward from the inner ring and tightly abut against the low-speed submersible motor shaft 2.

[0037] The skeleton sealing ring 3 used in this embodiment has a first sealing portion and a second sealing portion, which further makes the sealing area multi-layered and improves the sealing reliability.

[0038] Preferably, the inner ring and the outer ring are connected by a connecting portion at the first end of the skeleton sealing ring 3, and a sedimentation space is provided between the inner ring and the outer ring. When a small amount of mud and sand passes through the first sealing portion and the second sealing portion, it is deposited in the sedimentation space.

[0039] The technical solution of this embodiment further mitigates sand and gravel intrusion by providing a settling space between the inner ring and the outer ring. If a small amount of sand and gravel breaks through the second sealing portion, the settling space can provide a sedimentation space, delaying further erosion of the seal at the inner O-ring.

[0040] Preferably, the outer end surface of the connecting portion of the skeleton sealing ring 3 is provided with a wedge surface, and the angle formed by the wedge surface and the sealing surface of the first sealing portion in the counterclockwise direction is less than 180°.

[0041] The technical solution of this embodiment is to provide a wedge surface on the outer end surface of the connection part of the skeleton sealing ring 3. The angle between the wedge surface and the first sealing part can make the first sealing part better able to resist erosion by water and mud, thereby further improving the sealing effect.

[0042] Preferably, the inner O-ring and the outer O-ring are made of elastic sealing material.

[0043] The inner O-ring and the outer O-ring are made of elastic sealing material to improve the sealing effect against water. The elastic sealing material can be made of rubber, silicone, etc.

[0044] Preferably, the low-speed submersible motor shaft 2 is provided with two recessed portions and two corresponding inner O-rings in the circumferential direction. Figure 1 and Figure 2 The first inner O-ring 5 and the second inner O-ring 6.

[0045] Preferably, the sealing head 4 is circumferentially provided with two recessed portions and two corresponding external O-rings.

[0046] In this embodiment, multiple inner O-rings and multiple outer O-rings are provided to achieve a better sealing effect. Figure 1 and Figure 2 The first outer O-ring 8 and the second outer O-ring 9 are provided.

[0047] Preferably, a magnetic steel mounting plate 11 is fixedly provided on the inner side of the head 4 , and a magnetic steel is provided on the magnetic steel mounting plate 11 , and the low-speed running state of the motor is detected through the Hall element on the Hall PCB board 13 .

[0048] This embodiment can effectively detect the low-speed operation of the motor by installing a magnetic steel and a Hall PCB board 13 inside the head 4. The magnetic steel mounting plate 11 is fixed to the shaft 2 by a retaining spring 12 on the inner side.

[0049] Preferably, the Hall PCB board 13 is further provided with a leakage detection unit 16 to monitor water leakage inside the motor.

[0050] In the technical solution of this embodiment, a leakage detection unit 16 is further provided on the Hall PCB board 13, which can perform real-time detection. When an abnormal water leakage occurs inside the motor, the system can detect it immediately through the leakage detection unit 16.

[0051] Preferably, the low-speed submersible motor shaft 2 is sleeved with a bearing 7 , and the inner diameter of the head 4 is fixedly connected to the outer ring of the bearing 7 .

[0052] By providing the bearing 7, the dynamic rotation connection between the head and the low-speed submersible motor shaft 2 is made more stable, wear is reduced, and the service life of the watertight structure is increased.

[0053] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0054] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0055] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the identification content specifically executed by the above-described system and device can refer to the corresponding process in the aforementioned method embodiment.

[0056] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they will still fall within the scope of protection of the present invention.

Claims

1. A watertight structure of a low-speed submersible motor for underwater transducer cleaning, characterized in that: include: An inner O-shaped sealing ring sleeved on the circumferential recessed portion of the shaft of the low-speed submersible motor; A head with an inner diameter sleeved on the circumference of the low-speed submersible motor shaft and an outer diameter coupled to the inner diameter of the housing of the low-speed submersible motor, wherein the head forms a seal with the inner O-ring in a recessed portion on the circumference of the low-speed submersible motor shaft; An external O-shaped sealing ring is sleeved on the circumferential recessed portion of the head, wherein the external O-shaped sealing ring forms a seal with the housing of the low-speed submersible motor at the circumferential recessed portion of the head; The end of the head is provided with a hollow portion surrounding the low-speed submersible motor shaft, and a skeleton sealing ring with matching size is arranged in the hollow portion. The inner diameter of the skeleton sealing ring is tightly sleeved on the low-speed submersible motor shaft.

2. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: The skeleton sealing ring has an inner ring and an outer ring connected thereto, a first sealing portion is provided at the first end of the inner ring, and a second sealing portion is provided at the second end of the inner ring, the first sealing portion and the second sealing portion respectively protrude inward from the inner ring and tightly abut against the shaft of the low-speed submersible motor.

3. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 2, characterized in that: The inner ring and the outer ring are connected by a connecting portion at the first end of the skeleton sealing ring. A sedimentation space is provided between the inner ring and the outer ring. When a small amount of mud and sand passes through the first sealing portion and the second sealing portion, it is deposited in the sedimentation space.

4. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 3, characterized in that: The outer end surface of the skeleton sealing ring connecting portion is provided with a wedge surface, and the angle formed by the wedge surface and the sealing surface of the first sealing portion in the counterclockwise direction is less than 180°.

5. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: The inner O-ring and the outer O-ring are made of elastic sealing material.

6. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: The low-speed submersible motor shaft is circumferentially provided with two recessed portions and two corresponding inner O-type sealing rings.

7. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: The head is circumferentially provided with two recessed portions and two corresponding external O-rings.

8. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: A magnetic steel mounting plate is fixedly provided on the inner side of the head, and a magnetic steel is provided on the magnetic steel mounting plate. The low-speed running state of the motor is detected through the Hall element on the Hall PCB board.

9. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 8, characterized in that: The Hall PCB is also provided with a leakage detection unit to monitor water leakage inside the motor.

10. The watertight structure of a low-speed submersible motor for underwater transducer cleaning according to claim 1, characterized in that: The shaft of the low-speed submersible motor is sleeved with a bearing, and the inner diameter of the head is fixedly connected to the outer ring of the bearing.