Underwater propeller with anti-deformation and sealing functions

Abstract

The utility model belongs to the field of thrusters, and provides an underwater thruster with anti-deformation and sealing functions, which comprises a shell, a propeller, an anti-deformation sealing element, a sealing element, an anti-deformation sealing element, an anti-deformation sealing element, an anti-deformation sealing element, an anti-deformation sealing element, an anti-deformation sealing element and an anti-deformation sealing element, and the framework oil seal is arranged in the shell and movably arranged on the rotating shaft in a sleeving mode, and an opening in one side of the framework oil seal communicates with the exterior of the shell, so that the framework oil seal can be tightly pressed in the shell through water pressure and movably abuts against the rotating shaft, and the driving element is sealed in the containing cavity. Compared with the prior art, the utility model has the advantages that the pressure cavity and the deformation bag are automatically adjusted along with the change of external water pressure, so that the deformation phenomenon of the shell is avoided, and the normal operation of an internal driving element at various underwater depths is ensured; meanwhile, the mode that the framework oil seal is tightly attached to the rotating shaft through external water pressure is utilized, the sealing effect on the containing cavity is achieved, it is guaranteed that the rotating shaft drives the propeller to rotate normally, the reliability during operation is improved, and the service life during operation is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of propellers, and in particular relates to an underwater propeller with both anti-deformation and sealing functions. Background Art

[0002] As a key component in fields such as marine engineering, submarines and underwater robots, the working performance of underwater thrusters directly affects the reliability and efficiency of the entire system.

[0003] Traditional underwater thrusters typically consist of a propeller, a drive element, and other auxiliary components. The drive element rotates the propeller via a shaft to generate thrust. However, in high-pressure environments such as the deep sea, where pressure varies significantly with depth, the housing often deforms due to its inability to adapt to the external environment. This can squeeze or even damage the drive element within the housing. Furthermore, seal failure is common in high-pressure environments, allowing seawater to easily intrude along the outer wall of the shaft and into the drive element, impacting the propeller's normal operation. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an underwater propeller that can maintain internal pressure balance under different water pressure environments and has good sealing performance.

[0005] The utility model solves the technical problem by adopting a technical solution to provide an underwater propeller with both anti-deformation and sealing functions, comprising a propeller and a driving element, wherein the driving element is provided with a rotating shaft for driving the propeller to rotate; and comprises: a housing having an accommodating cavity therein, wherein the accommodating cavity is used to install the driving element so as to rotatably install the propeller at the end of the housing;

[0006] a skeleton oil seal, disposed within the housing and movably sleeved on the rotating shaft, with one side opening of the skeleton oil seal communicating with the exterior of the housing so that water pressure can press the skeleton oil seal tightly within the housing and movably abut against the rotating shaft, thereby sealing the driving element within the accommodating cavity;

[0007] A pressure chamber and a deformation sac, wherein the pressure chamber is formed at an end of the shell, the pressure chamber is connected to the outside of the shell but is not connected to the accommodating chamber; the deformation sac is arranged in the pressure chamber and opens toward the accommodating chamber;

[0008] The deformable bag can shrink and deform when the pressure in the pressure chamber changes, so that the pressure value in the accommodating chamber is consistent with the pressure value outside the shell.

[0009] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a pressure block and two oil seal end covers are also provided in the shell, the rotating shaft is rotatably arranged in the oil seal end cover, and the two oil seal end covers and the shell together form the accommodating cavity; the pressure block is used to press the port of the deformation bag onto the oil seal end cover.

[0010] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a plurality of through holes are distributed in an annular shape on the shell, and the through holes are used to guide water into the pressure chamber to squeeze the deformation bag to shrink and deform.

[0011] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, the skeleton oil seal includes a connecting part and a sealing part, both of which are arranged in a ring shape, an extension ring is formed on the connecting part, and a mounting groove is provided in the oil seal end cover. The connecting part can be pressed against the mounting groove because the extension ring is movably sleeved on the rotating shaft; the sealing part is connected to the connecting part and forms an open cavity with it, and the open end of the open cavity is arranged parallel to the axial center line of the rotating shaft and is connected to the outside of the shell.

[0012] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a first inclined surface and a second inclined surface are formed on the sealing part, the first inclined surface and the second inclined surface are arranged at an angle, and the connection between the first inclined surface and the second inclined surface is in line contact with the rotating shaft.

[0013] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a flow guide cover is also installed at the end of the shell away from the pressure chamber. The propeller is rotatably arranged inside the flow guide cover and forms a flow guide channel connected to the open cavity.

[0014] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, the driving element also includes a motor rotor and a bearing, the motor rotor is arranged in the accommodating cavity and connected to the rotating shaft; the bearing is arranged at both ends of the rotating shaft, and the outer ring of the bearing is interference fit with the inner wall of the oil seal end cover.

[0015] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a sealing ring pressed against the inner wall of the shell is installed in each of the oil seal end covers, and the sealing ring is used to seal the accommodating cavity.

[0016] In the above-mentioned underwater propeller with both anti-deformation and sealing functions, a sealing cover is detachably connected to the shell, and the sealing cover is used to form the pressure chamber at the end of the shell.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The utility model provides an underwater propeller with both anti-deformation and sealing functions. By arranging a pressure chamber and a deformation bag in the shell, the pressure in the accommodating chamber can be automatically adjusted as the external water pressure changes, thereby avoiding the shell from being deformed by the water pressure change and ensuring the normal operation of the internal driving components at various underwater depths. At the same time, the external water pressure is used to tightly fit the skeleton oil seal to the rotating shaft, which will not affect the normal rotation operation of the propeller driven by the rotating shaft, and achieves the sealing effect of the accommodating chamber, effectively preventing moisture from invading the driving components, enhancing the sealing performance of the propeller, and also improving the reliability and service life during operation.

[0019] (2) The line contact method reduces the contact area between the seal and the shaft, which reduces friction and helps to extend the service life of the oil seal and reduce maintenance costs.

[0020] (3) The sealing cover can not only form the required pressure chamber, but also be removed from the shell in time when the deformation bag is damaged, which provides great convenience for the installation, removal and replacement of the deformation bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of the present application;

[0022] Figure 2 yes Figure 1 Schematic diagram of the cross section at AA in the middle;

[0023] Figure 3 yes Figure 2 A partial enlarged view of point B in FIG.

[0024] In the figure, 1. propeller;

[0025] 2. Driving element; 20. Motor rotor; 21. Rotating shaft; 22. Bearing;

[0026] 3. Housing; 30. Accommodating cavity; 31. Press block; 32. Oil seal end cap; 320. Mounting groove; 321. Sealing ring; 33. Through hole; 34. Flow guide cover; 340. Flow guide channel;

[0027] 4. Skeleton oil seal; 40. Connecting portion; 400. Extension ring; 41. Sealing portion; 410. First inclined surface; 411. Second inclined surface; 420. Open cavity;

[0028] 5. Sealing cover; 50. Pressure chamber;

[0029] 6. Deformation capsule. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figures 1 to 3 As shown, the utility model is an underwater propeller with both anti-deformation and sealing functions, comprising a propeller 1 and a driving element 2, wherein the driving element 2 is provided with a rotating shaft 21 for driving the propeller 1 to rotate; the propeller further comprises: a housing 3, which is internally provided with a receiving cavity 30, the receiving cavity 30 being used to install the driving element 2 so as to rotate the propeller 1 and be arranged at the end of the housing 3; a skeleton oil seal 4, which is arranged in the housing 3 and movably sleeved on the rotating shaft 21, and one side opening of the skeleton oil seal 4 is connected to the outside of the housing 3 so that water pressure energy It is possible to press the skeleton oil seal 4 tightly in the shell 3 and move it against the rotating shaft 21 to seal the driving element 2 in the accommodating chamber 30; the pressure chamber 50 and the deformation bag 6, the pressure chamber 50 is formed at the end of the shell 3, the pressure chamber 50 is connected to the outside of the shell 3 but not connected to the accommodating chamber 30; the deformation bag 6 is arranged in the pressure chamber 50 and opens toward the accommodating chamber 30; the deformation bag 6 can shrink and deform due to the pressure change in the pressure chamber 50, so that the pressure value in the accommodating chamber 30 is consistent with the pressure value outside the shell 3.

[0032] This embodiment mainly solves the problem of deformation and sealing failure of the propeller housing 3. Specifically, Figures 1 to 3 As shown, before the propeller is started, there is a certain pressure difference between the accommodating chamber 30 in the shell 3 and the external environment. At this time, the deformation bag 6 is in a natural expansion state and is not subjected to additional pressure; when the underwater propeller starts to work, since the pressure chamber 50 is directly connected to the outside of the shell 3, as the pressure of the underwater environment changes with depth, the change in external water pressure will be directly reflected in the pressure chamber 50. At this time, the deformation bag 6 is affected by the water pressure in the pressure chamber 50 and begins to shrink and deform. This deformation will cause the air in the accommodating chamber 30 to be compressed, thereby all the oil is gathered in the accommodating chamber 30 with the driving element 2. Because of this, the pressure in the accommodating chamber 30 gradually reaches a balance with the external water pressure. This dynamic balance mechanism ensures The driving element 2 can operate normally under different water depth conditions, and the damage of the driving element 2 caused by the deformation of the shell 3 due to the pressure difference is avoided; at the same time, one side opening of the skeleton oil seal 4 is connected to the outside of the shell 3, and the external water pressure will press the skeleton oil seal 4 into the shell 3 and make it fit tightly on the rotating shaft 21. In other words, in the process of the driving element 2 driving the rotating shaft 21 to realize the rotation of the propeller 1, the skeleton oil seal 4 is always movable and tightly attached to the rotating shaft 21 due to the external water pressure. While ensuring the normal rotation operation of the propeller 1, it also ensures that the skeleton oil seal 4 is always in a sealed state with the accommodating cavity 30, effectively preventing moisture from invading the driving element 2, enhancing the sealing performance of the propeller, and improving the reliability and service life during operation.

[0033] The housing 3 is provided with a plurality of through holes 33 distributed in an annular shape. The through holes 33 are used to guide water into the pressure chamber 50 to squeeze the deformation bladder 6 to shrink and deform.

[0034] like Figure 1 and Figure 2 As shown, several through-holes 33 are distributed equidistantly in a circular pattern on the housing 3. The design of these through-holes 33 allows water to enter the pressure chamber 50 evenly, rather than being concentrated at a single point. During continuous operation of the propeller, the through-holes 33 on the housing 3 continuously guide the water into the pressure chamber 50. The deformable bladder 6 dynamically adjusts (i.e., gradually contracts and deforms) based on pressure changes within the pressure chamber 50, thereby maintaining the pressure within the accommodating chamber 30 in equilibrium with the external water pressure. It should be noted that the contraction and expansion principles of the deformable bladder 6 are the same as those of an airbag and will not be further described here.

[0035] A pressure block 31 and two oil seal end covers 32 are also provided in the shell 3. The rotating shaft 21 is rotatably arranged in the oil seal end covers 32, and the two oil seal end covers 32 and the shell 3 together form a accommodating cavity 30; the pressure block 31 is used to press the port of the deformation bag 6 onto the oil seal end cover 32.

[0036] Further, if Figure 2 As shown, the oil seal end caps 32 are respectively provided at both ends of the accommodating chamber 30. The oil seal end caps 32 can seal the oil in the accommodating chamber 30. During the installation process of the deformation capsule 6, the design of the pressure block 31 ensures that the port of the deformation capsule 6 is always tightly pressed against the oil seal end cap 32, effectively preventing the deformation capsule 6 from moving or loosening during the contraction or expansion process, thereby improving the overall stability of the structure. It should be added that the pressure block 31 and the port of the deformation capsule 6 are compressed and fixed using a structure similar to a snap-on structure. At the same time, the pressure block 31 can be connected to the housing 3 by screws, screws, and other connecting parts 40. Even in the case of large changes in external water pressure, the pressure block 31 can still ensure that the port of the deformation capsule 6 remains tightly sealed, thereby enhancing the sealing performance of the thruster.

[0037] Preferably, if Figure 2 As shown, in this embodiment, a sealing ring 321 is installed in each oil seal end cover 32 and is pressed against the inner wall of the shell 3. The design of the sealing ring 321 further improves the sealing effect of the oil seal end cover 32 on the accommodating cavity 30.

[0038] The skeleton oil seal 4 includes a connecting portion 40 and a sealing portion 41, both of which are arranged in an annular shape. An extension ring 400 is formed on the connecting portion 40, and a mounting groove 320 is provided in the oil seal end cover 32. The connecting portion 40 can be tightly pressed in the mounting groove 320 because the extension ring 400 is movably sleeved on the rotating shaft 21; the sealing portion 41 is connected to the connecting portion 40 and forms an open cavity 420 with it. The open end of the open cavity 420 is arranged parallel to the axis of the rotating shaft 21 and is connected to the outside of the housing 3.

[0039] like Figures 2 to 3 As shown, the extension ring 400 is set along the radial direction of the connecting portion 40. During the installation process, the extension ring 400 is sleeved on the rotating shaft 21 to realize the installation of the skeleton oil seal 4 and the rotating shaft 21. It is worth noting that the sealing portion 41 is also in contact with the outer wall of the rotating shaft 21 at this time, and the opening cavity 420 formed by the sealing portion 41 and the connecting portion 40 is connected to the outside of the shell 3. After the underwater propeller is started, the external water pressure can enter the opening cavity 420. Since the opening cavity 420 is set in a horizontal posture as a whole, it is used On the one hand, the external water pressure can firmly press the connecting part 40 against the mounting groove 320 of the oil seal end cover 32, which is beneficial to maintaining the position of the skeleton oil seal 4 unchanged and enhancing the stability of the overall structure; on the other hand, it acts on the sealing part 41, so that the sealing part 41 is always pressed against the rotating shaft 21, thereby forming an effective sealing effect. As the underwater environment changes, the sealing part 41 can adjust the pressing force on the rotating shaft 21 accordingly according to the change in water pressure, thereby preventing external water from seeping into the accommodating cavity 30 and affecting the normal operation of the driving element 2.

[0040] Preferably, the skeleton oil seal 4 in this embodiment is made of a rubber material as a whole, so during the installation process of the extension ring 400, and when the external water pressure in the open cavity 420 squeezes the connecting part 40, the extension ring 400 and the connecting part 40 can both have a certain sealing effect on the accommodating cavity 30, further improving the sealing performance.

[0041] A first inclined surface 410 and a second inclined surface 411 are formed on the sealing portion 41 . The first inclined surface 410 and the second inclined surface 411 are arranged at an angle, and a connection between the first inclined surface 410 and the second inclined surface 411 is in line contact with the rotating shaft 21 .

[0042] like Figure 3As shown, the first inclined surface 410 and the second inclined surface 411 are arranged in a V-shape as a whole. This design enables the sealing portion 41 to fit more closely to the surface of the rotating shaft 21, especially their connection is in line contact with the rotating shaft 21. This design reduces the contact area, reduces the friction, and increases the contact pressure per unit area, thereby effectively preventing water from flowing into the accommodating cavity 30; not only that, the inclined surface design enables the sealing portion 41 to automatically adjust its contact state with the rotating shaft 21 according to changes in the external water pressure, and maintain a good sealing effect even when the water pressure changes greatly. This adaptability improves the sealing performance of the oil seal under different water depth conditions.

[0043] A flow guide cover 34 is further installed at the end of the housing 3 away from the pressure chamber 50 . The propeller 1 is rotatably arranged inside the flow guide cover 34 and forms a flow guide channel 340 communicating with the open cavity 420 .

[0044] like Figure 1 and Figure 2 As shown, during the continuous operation of the propeller, the guide cover 34 can not only help guide the water flow, but also protect the propeller 1, prevent foreign matter from entering the propeller 1 area, and reduce the risk of damage to the propeller 1; it is worth noting that the guide cover 34 can be installed on the end of the shell 3 through screws, screws and other connecting parts 40, so when the propeller is operating, the propeller 1 rotates relative to the guide cover 34. For this reason, the gap between the two is set to form a guide channel 340 connected to the open cavity 420, so that the external water pressure can enter the open cavity 420 through the guide channel 340 to realize the positioning and compression sealing function of the skeleton oil seal 4.

[0045] The driving element 2 also includes a motor rotor 20 and a bearing 22. The motor rotor 20 is arranged in the accommodating cavity 30 and connected to the rotating shaft 21; the bearing 22 is arranged at both ends of the rotating shaft 21, and the outer ring of the bearing 22 is interference fit with the inner wall of the oil seal end cover 32.

[0046] like Figure 2 As shown, during the continuous operation of the propeller, the rotation of the motor rotor 20 drives the rotating shaft 21 to rotate, thereby generating thrust when the propeller 1 rotates synchronously, and the interference fit design of the bearing 22 enables the bearing 22 to maintain stable rotation of the rotating shaft 21 when subjected to changes in external water pressure, thereby improving the reliability of the propeller.

[0047] Preferably, if Figure 2 As shown, a sealing cover 5 is detachably connected to the shell 3, and the sealing cover 5 mainly cooperates with the shell 3 to form a pressure chamber 50. It should be noted that the connection between the two can be achieved through a threaded connection with a sealing device or an interference fit to achieve assembly operations, which provides convenience for subsequent maintenance and replacement of the deformation bag 6.

[0048] 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.

[0049] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. An underwater propeller with both anti-deformation and sealing functions, comprising a propeller and a driving element, wherein the driving element is provided with a rotating shaft for driving the propeller to rotate; characterized in that: include: A housing having an accommodating cavity therein, wherein the accommodating cavity is used to install a driving element to rotate the propeller to be disposed at an end of the housing; a skeleton oil seal, disposed within the housing and movably sleeved on the rotating shaft, with one side opening of the skeleton oil seal communicating with the exterior of the housing so that water pressure can press the skeleton oil seal tightly within the housing and movably abut against the rotating shaft, thereby sealing the driving element within the accommodating cavity; A pressure chamber and a deformation sac, wherein the pressure chamber is formed at an end of the shell, the pressure chamber is connected to the outside of the shell but is not connected to the accommodating chamber; the deformation sac is arranged in the pressure chamber and opens toward the accommodating chamber; The deformable bag can shrink and deform when the pressure in the pressure chamber changes, so that the pressure value in the accommodating chamber is consistent with the pressure value outside the shell.

2. The underwater propeller with both anti-deformation and sealing functions according to claim 1, characterized in that: A pressure block and two oil seal end covers are also provided in the shell. The rotating shaft is rotatably provided in the oil seal end covers, and the two oil seal end covers and the shell together form the accommodating cavity; the pressure block is used to press the port of the deformation bag onto the oil seal end cover.

3. The underwater propeller with both anti-deformation and sealing functions according to claim 1, characterized in that: The shell is provided with a plurality of through holes distributed in an annular shape, and the through holes are used to guide water into the pressure chamber to squeeze the deformation bag to shrink and deform.

4. The underwater propeller with both anti-deformation and sealing functions according to claim 2, characterized in that: The skeleton oil seal includes a connecting portion and a sealing portion, both of which are arranged in an annular shape. An extension ring is formed on the connecting portion, and a mounting groove is provided in the oil seal end cover. The connecting portion can be pressed against the mounting groove because the extension ring is movably sleeved on the rotating shaft; the sealing portion is connected to the connecting portion and forms an open cavity with it. The open end of the open cavity is arranged parallel to the axis of the rotating shaft and is connected to the outside of the shell.

5. The underwater propeller with both anti-deformation and sealing functions according to claim 4, characterized in that: A first inclined surface and a second inclined surface are formed on the sealing portion. The first inclined surface and the second inclined surface are arranged at an angle, and a connection point between the first inclined surface and the second inclined surface is in line contact with the rotating shaft.

6. The underwater propeller with both anti-deformation and sealing functions according to claim 4, characterized in that: A flow guide cover is also installed at the end of the shell away from the pressure chamber. The propeller is rotatably arranged inside the flow guide cover and forms a flow guide channel connected to the open cavity with the propeller.

7. The underwater propeller with both anti-deformation and sealing functions according to claim 2, characterized in that: The driving element further includes a motor rotor and a bearing. The motor rotor is disposed in the accommodating cavity and connected to the rotating shaft. The bearing is disposed at both ends of the rotating shaft, and the outer ring of the bearing is interference fit with the inner wall of the oil seal end cover.

8. The underwater propeller with both anti-deformation and sealing functions according to claim 2, characterized in that: A sealing ring is installed in each of the oil seal end covers and is pressed against the inner wall of the shell. The sealing ring is used to seal the accommodating cavity.

9. The underwater propeller with both anti-deformation and sealing functions according to claim 1, characterized in that: A sealing cover is detachably connected to the shell, and the sealing cover is used to form the pressure chamber at the end of the shell.

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