Connecting shaft device suitable for deep sea environment

Abstract

The utility model provides a connecting shaft device suitable for a deep sea environment, and belongs to the technical field of couplings. Comprising a driving turntable, a driven turntable and a central piston cylinder, the driving turntable and the driven turntable are oppositely arranged in parallel and connected with driving shafts, annular sliding grooves are formed in the opposite sides, and the axis of the driving turntable and the driving shafts are arranged at an angle. The center piston barrel is arranged between the driving rotary disc and the driven rotary disc and is coaxial with the driving shaft, a plurality of piston cylinder holes are formed in the circumferential direction of the center piston barrel at equal-angle intervals, a one-way valve is arranged on the side wall of the center piston barrel, and sealing films are arranged at the joints of the one-way valve and the piston cylinder holes. A first piston rod and a second piston rod are inserted into two ends of the piston cylinder hole, one ends of the first piston rod and the second piston rod in the piston cylinder hole are arranged at an interval and filled with hydraulic oil, and the other ends of the first piston rod and the second piston rod are slidably mounted in the annular sliding grooves in the driving turntable and the driven turntable respectively. The stress condition of the inner and outer sealing positions can be improved, and the liquid leakage risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to a coupling device suitable for deep-sea environments. Background Technology

[0002] A coupling, also known as a joint, is a mechanical component used to securely connect the driving and driven shafts of different mechanisms to rotate together and transmit motion and torque. In marine operating environments, many electromechanical devices need to be sealed in dry compartments to operate, while motors and encoders need to extend their rotating shafts out of the dry compartment to interact with the outside environment. Therefore, a coupling mechanism is required to connect the interior of the dry compartment with the external environment.

[0003] In related technologies, a rotary seal is required between the rotating shaft and structures such as the end caps isolating the inner and outer sides of the underwater equipment. For example, a sealing ring is installed on the section of the shaft that passes through the end cap to ensure that external liquids cannot penetrate into the dry compartment. However, when the coupling structure is applied to the deep-sea environment, there is a large pressure difference between the inside and outside of the structure. The structure relying solely on the rotary seal is difficult to withstand the high pressure difference, resulting in poor sealing reliability and the risk of leakage. Utility Model Content

[0004] This utility model provides a coupling device suitable for deep-sea environments. Through structural optimization, the stress conditions at the inner and outer seals are improved, reducing the risk of leakage. The technical solution is as follows:

[0005] This utility model provides a coupling device suitable for deep-sea environments, comprising: an active rotary table, a driven rotary table, and a central piston cylinder.

[0006] The active turntable and the driven turntable are arranged opposite to each other. A coaxial drive shaft is connected to the center of the opposite side of the active turntable and the driven turntable. The axis of the active turntable is arranged at an angle to the drive shaft. The driven turntable is parallel to the active turntable. Circumferential sliding grooves are provided on the opposite sides of the active turntable and the driven turntable.

[0007] The central piston cylinder is disposed between the driving turntable and the driven turntable and is coaxially arranged with the drive shaft. The central piston cylinder has multiple axially penetrating piston cylinder holes, which are arranged at equal angular intervals around the central piston cylinder. A one-way valve is provided on the side wall of the central piston cylinder, which radially communicates with the piston cylinder holes. A sealing membrane is provided at the connection between the one-way valve and the piston cylinder hole. A first piston rod and a second piston rod are inserted into both ends of each piston cylinder hole. The first piston rod and the second piston rod are spaced apart at one end in the piston cylinder hole and filled with hydraulic oil between them. The other end of the first piston rod is slidably mounted in the annular sliding groove on the driving turntable, and the other end of the second piston rod is slidably mounted in the annular sliding groove on the driven turntable.

[0008] Optionally, the cross-sectional profile of the annular sliding groove in the extending direction is arc-shaped, and the other ends of the first piston rod and the second piston rod are provided with hemispherical ends that match the annular sliding groove.

[0009] Optionally, a ball groove is provided on the hemispherical end, and a ball is rolled and embedded in the ball groove.

[0010] Optionally, the piston cylinder bore is provided with 8 holes.

[0011] Optionally, a sealing ring matching the first piston rod and the second piston rod is provided on the inner wall of the piston cylinder bore, and the first piston rod and the second piston rod are both inserted into the corresponding sealing ring.

[0012] Optionally, multiple sealing rings are provided for both the first piston rod and the second piston rod, and the multiple sealing rings are arranged at intervals along the axial direction of the piston cylinder bore.

[0013] Optionally, the sealing ring has an annular opening on one end face in the axial direction. Among the plurality of sealing rings corresponding to the first piston rod, at least two of the annular openings are arranged in opposite directions and face the two ends of the piston cylinder bore, respectively. Among the plurality of sealing rings corresponding to the second piston rod, at least two of the annular openings are arranged in the same direction and face one side of the first piston rod.

[0014] Optionally, it also includes a connecting chamber, which is coaxially connected to both ends of the central piston cylinder and respectively sleeved on the outside of the driving turntable and the driven turntable.

[0015] The beneficial effects of the technical solution provided by this utility model embodiment include at least the following:

[0016] The coupling device provided in this embodiment connects to equipment located inside and outside the dry compartment via drive shafts connected to the active and driven turntables. Multiple first and second piston rods, movably embedded in their respective annular sliding grooves, are combined from the piston cylinder bores of the central piston cylinder on both sides. Hydraulic oil is filled between the first and second piston rods to form a hydraulic transmission structure. The coupling transmission is achieved using the inclined surface structure of the active and driven turntables relative to the end face of the central piston cylinder. A pressure balancing mechanism consisting of a one-way valve and a sealing diaphragm is provided for each hydraulic oil filling section of the piston cylinder bore. When external water flows into the piston cylinder bore through the one-way valve, the water pressure acts on the sealing diaphragm, causing it to deform due to its elasticity, thus transmitting the water pressure and compressing the internal hydraulic oil. As the hydraulic oil is compressed, it also exerts pressure on the sealing membrane, as well as the first and second piston rods on both sides. While ensuring that the internal hydraulic pressure can push the opposing piston rods, the pressure on the inner and outer sides of the first piston rod is balanced, ensuring that external water cannot penetrate further inward. By optimizing the structure, the stress condition at the inner and outer seals is improved, reducing the risk of leakage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a coupling device suitable for deep-sea environments provided in an embodiment of this utility model;

[0019] Figure 2 This is a cross-sectional view of the internal structure of a coupling device suitable for deep-sea environments provided in this embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the active turntable provided in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the first piston rod provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the sealing ring provided in this embodiment of the utility model;

[0023] Figure 6 yes Figure 2 Enlarged view of the local structure at point A;

[0024] Figure 7 yes Figure 2 Enlarged view of the local structure at point B;

[0025] Figure 8 This is a schematic diagram of the coupling device provided in this embodiment of the utility model, which is equipped with a connecting chamber.

[0026] In the diagram: 1-Active turntable; 2-Driven turntable; 3-Central piston cylinder; 4-Drive shaft; 5-Annular sliding groove; 6-First piston rod; 7-Second piston rod; 8-Hemispherical end; 9-Sealing ring; 31-Piston cylinder bore; 32-One-way valve; 33-Sealing diaphragm; 34-Connecting chamber; 81-Ball groove; 82-Ball; 91-Annular opening. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Figure 1 This is a three-dimensional structural schematic diagram of a coupling device suitable for deep-sea environments provided in an embodiment of this utility model; Figure 2 This is a cross-sectional view of the internal structure of a coupling device suitable for deep-sea environments provided in this embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the active turntable provided in this embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the first piston rod provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the sealing ring provided in this embodiment of the utility model; Figure 6 yes Figure 2 Enlarged view of the local structure at point A; Figure 7 yes Figure 2 Enlarged view of the local structure at point B; Figure 8 This is a schematic diagram of the coupling device provided in this embodiment of the utility model, which is equipped with a connecting chamber. Figures 1 to 8 As shown, this utility model embodiment provides a coupling device suitable for deep-sea environments, including an active turntable 1, a driven turntable 2, and a central piston cylinder 3.

[0030] The driving turntable 1 and the driven turntable 2 are arranged opposite each other, and a coaxial drive shaft 4 is connected to the center of each opposite side of the driving turntable 1 and the driven turntable 2. The axis of the driving turntable 1 is arranged at an angle to the drive shaft 4, and the driven turntable 2 is parallel to the driving turntable 1. Circumferentially arranged annular sliding grooves 5 are provided on the opposite sides of the driving turntable 1 and the driven turntable 2.

[0031] A central piston cylinder 3 is positioned between the driving turntable 1 and the driven turntable 2 and is coaxially arranged with the drive shaft 4. The central piston cylinder 3 has multiple axially penetrating piston cylinder bores 31, which are spaced at equal angular intervals around the circumference of the central piston cylinder 3. A one-way valve 32, radially communicating with the piston cylinder bores 31, is provided on the side wall of the central piston cylinder 3. A sealing membrane 33 is provided at the connection between the one-way valve 32 and the piston cylinder bore 31. A first piston rod 6 and a second piston rod 7 are inserted into both ends of each piston cylinder bore 31. The first piston rod 6 and the second piston rod 7 are spaced apart at one end within the piston cylinder bore 31 and filled with hydraulic oil between them. The other end of the first piston rod 6 is slidably mounted in an annular sliding groove 5 on the driving turntable 1, and the other end of the second piston rod 7 is slidably mounted in an annular sliding groove 5 on the driven turntable 2.

[0032] In this embodiment of the invention, the coupling device is positioned between the dry compartment of the underwater vehicle and the external water body. A portion of the active turntable 1 and the central piston cylinder 3 extend into the external water body. A drive shaft mounted on the active turntable 1 connects to a motor and encoder located outside the compartment. The driven turntable 2 is located inside the dry compartment and is used to connect electromechanical equipment such as detection devices. The central piston cylinder 3, as the main coupling transmission structure, is a fixed structure, and the entire assembly is connected to the underwater equipment via connecting chamber cylinders 34 at both axial ends. The central piston cylinder 3 has eight piston cylinder holes 31 evenly distributed circumferentially. A first piston rod 6 and a second piston rod 7 are retractably inserted into the openings at both ends of the central piston cylinder hole 31. A certain distance exists between the inserted ends of the first piston rod 6 and the second piston rod 7, and this space between the piston cylinder holes 31 is filled with hydraulic oil. Furthermore, in the radial direction of the central piston cylinder 3, a one-way valve 32 is provided for each piston cylinder bore 31, connecting the outer wall of the central piston cylinder 3 to the hydraulic oil-filled space in the piston cylinder bore 31. A sealing membrane 33 is provided at the outlet end of the one-way valve 32, i.e., at the connection point with the hydraulic oil-filled space in the piston cylinder bore 31, to form an internal and external isolation. On the outer sides of both ends of the central piston cylinder 3, the other ends of multiple first piston rods 6 are slidably mounted in annular sliding grooves 5 on the driving turntable 1, and the other ends of multiple second piston rods 7 are slidably mounted in annular sliding grooves 5 on the driven turntable 2. Since the drive shafts 4 on both sides are coaxially arranged, and the discs of the driving turntable 1 and the driven turntable 2 are parallel to each other, the distance between the piston surfaces of the first piston rods 6 and the second piston rods 7 on both sides of the multiple piston cylinder bores 31 remains consistent.

[0033] When the external motor and encoder are working, the active turntable 1 rotates under the drive of its connected drive shaft 4. Because the axis of the active turntable 1 is angled relative to the drive shaft 4, its disc surface always has two extreme positions: one closer to the end face of the central piston cylinder 3 and the other farther away. During rotation, the disc segment closer to the end face of the central piston cylinder 3 pushes the first piston rod 6, which is slidably connected to it, into the piston cylinder bore 31; the disc segment farther from the end face of the central piston cylinder 3 pulls the first piston rod 6, which is slidably connected to it, out of the piston cylinder bore 31. Correspondingly, under the action of internal hydraulic oil, when the first piston rod 6 on one side is pushed in, the corresponding second piston rod 7 on the other side is pushed out; when the first piston rod 6 on one side is pulled out, the corresponding second piston rod 7 on that side is pulled in. Therefore, when multiple second piston rods 7 are also in sliding engagement with the annular sliding groove 5 of the driven turntable 2 parallel to the active turntable 1, under the power of the multiple second piston rods 7 moving in conjunction with the other side to push out and pull in, the driven turntable 2 will rotate in the same direction as the active turntable 1, and then drive the electromechanical equipment inside the dry compartment to work using the drive shaft 4 connected to it, forming a shaft transmission.

[0034] The coupling device provided in this embodiment connects to equipment located inside and outside the dry compartment via drive shafts 4 connected to the active turntable 1 and the driven turntable 2. Multiple first piston rods 6 and second piston rods 7, each movably embedded in an annular sliding groove 5, are combined from the piston cylinder bores 31 of the central piston cylinder 3 on both sides and in the middle. A hydraulic transmission structure is formed by filling the space between the first piston rods 6 and second piston rods 7 with hydraulic oil. The coupling transmission is achieved using the disc surface structure of the active turntable 1 and the driven turntable 2, which are arranged at an angle relative to the end face of the central piston cylinder 3. A pressure balancing mechanism consisting of a one-way valve 32 and a sealing diaphragm 33 is provided for each hydraulic oil filling section of the piston cylinder bore 31. When external water flows into the piston cylinder bore 31 through the one-way valve 32, the water pressure acts on the sealing diaphragm 33, causing it to deform due to its elasticity, thus transmitting the water pressure and compressing the internal hydraulic oil. While the hydraulic oil is compressed, it also exerts pressure on the sealing membrane 33, as well as the first piston rod 6 and the second piston rod 7 on both sides. While ensuring that the internal hydraulic pressure can push the opposing piston rods, the pressure on the inner and outer sides of the first piston rod 6 is balanced, ensuring that external water cannot penetrate further inward. By optimizing the structure, the stress condition at the inner and outer seals is improved, reducing the risk of leakage.

[0035] For example, in this embodiment of the present invention, at least four piston cylinder bores 31 are arranged at equal angles around the central piston cylinder 3 to ensure that there are piston rod structures in at least four directions to push and / or pull the surface of the driving turntable 1 or the driven turntable 2, thus ensuring smooth rotation. Furthermore, based on the specifications of the central piston cylinder 3, more sets of piston cylinder bores 31 can be adaptively provided to configure a hydraulic push-pull structure, further improving transmission smoothness.

[0036] Optionally, the cross-sectional profile of the annular sliding groove 5 in the extending direction is arc-shaped, and the other end of the first piston rod 6 and the second piston rod 7 is provided with a hemispherical end 8 that matches the annular sliding groove 5. For example, the first piston rod 6 and the second piston rod 7 are movably embedded in the annular sliding groove 5 using hemispherical ends 8 with a diameter larger than the rod diameter. The opening size of the annular sliding groove 5 is slightly smaller than the diameter of the hemispherical end 8, so as to limit the first piston rod 6 and the second piston rod 7 in the axial direction of the central piston cylinder 3 and prevent the connection from loosening. At the same time, the first piston rod 6 and the second piston rod 7 can also obtain a certain degree of freedom of angular swing. While ensuring relatively smooth sliding, the overall structural stability is improved.

[0037] Optionally, a ball groove 81 is provided on the hemispherical end 8, and a ball 82 is rolled and embedded in the ball groove 81. Exemplarily, in this embodiment of the present invention, by providing a rolling ball 82 at the end of the hemispherical end 8 embedded in the annular sliding groove 5, when the driving turntable 1 or the driven turntable 2 rotates relative to the hemispherical end 8, the axial contact in the central piston cylinder 3 can be changed from sliding contact to rolling release, reducing relative friction and further improving transmission smoothness.

[0038] Optionally, a sealing ring 9 matching the first piston rod 6 and the second piston rod 7 is provided on the inner wall of the piston cylinder bore 31, and both the first piston rod 6 and the second piston rod 7 pass through the corresponding sealing ring 9. Exemplarily, in this embodiment of the invention, in addition to achieving the coupling effect and the balance of internal and external pressure, to ensure sealing performance, a sealing ring 9 is provided on the inner wall of the piston cylinder bore 31 in each stroke direction of the first piston rod 6 and the second piston rod 7, sleeved on the outside of the first piston rod 6 and the second piston rod 7, to seal the assembly gap between the first piston rod 6, the second piston rod 7 and the piston cylinder bore 31. Further, multiple sealing rings 9 are provided corresponding to the first piston rod 6 and the second piston rod 7, and the multiple sealing rings 9 are spaced apart along the axial direction of the piston cylinder bore 31 to further improve sealing stability.

[0039] Optionally, the sealing ring 9 has an annular opening 91 on one end face in the axial direction. For the plurality of sealing rings 9 corresponding to the first piston rod 6, at least two of the annular openings 91 are arranged in opposite directions and face the two ends of the piston cylinder bore 31, respectively. For the plurality of sealing rings 9 corresponding to the second piston rod 7, at least two of the annular openings 91 are arranged in the same direction and face one side of the first piston rod 6. Exemplarily, in this embodiment of the present invention, two sealing rings 9 are provided for both the first piston rod 6 and the second piston rod 7. Each sealing ring 9 adopts a sealing structure with an annular opening 91 on one side and a "U"-shaped cross-sectional profile. The side closest to the active turntable 1, i.e., the two sealing rings 9 fitted onto the first piston rod 6, has annular openings 91 arranged in opposite directions and facing the two ends of the piston cylinder bore 31, respectively. As the coupling device is gradually lowered into deeper water, the pressure of the hydraulic oil and the external environment gradually increases. The gap between the first piston rod 6 and the piston cylinder bore 31 will be filled with liquid. The sealing ring 9 near the active rotary disc 1 will expand its annular opening 91 under external water pressure, becoming increasingly tighter. The hydraulic oil in the piston cylinder bore 31 will also expand the opening of the oppositely arranged sealing ring 9 under pressure, thus ensuring a sealing effect. Furthermore, during piston movement, the hydraulic oil will leak to some extent from the external water. The hydraulic oil and water in the first piston rod 6 section will converge in the area between the two sealing rings 9. Due to the pressure balance, external water will be unable to penetrate further. The hydraulic oil fitted into the second piston rod 7 section will enter between the two sealing rings 9. Blocked by the two sealing rings 9, it will also be unable to penetrate into the tank, effectively preventing internal and external leakage.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above description is only an optional embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coupling device suitable for deep-sea environments, characterized in that, include: The driving turntable (1), the driven turntable (2), and the central piston cylinder (3) The active turntable (1) and the driven turntable (2) are arranged opposite to each other. The centers of the opposite sides of the active turntable (1) and the driven turntable (2) are connected to a coaxially arranged drive shaft (4). The axis of the active turntable (1) is arranged at an angle to the drive shaft (4). The driven turntable (2) is parallel to the active turntable (1). The opposite sides of the active turntable (1) and the driven turntable (2) are provided with annular sliding grooves (5) arranged in the circumferential direction. The central piston cylinder (3) is disposed between the driving turntable (1) and the driven turntable (2) and is coaxially arranged with the drive shaft (4). The central piston cylinder (3) is provided with a plurality of axially penetrating piston cylinder holes (31). The plurality of piston cylinder holes (31) are arranged at equal angular intervals around the central piston cylinder (3) in the circumferential direction. A one-way valve (32) is provided on the side wall of the central piston cylinder (3) and communicates radially with the piston cylinder holes (31). A connection is provided at the connection between the one-way valve (32) and the piston cylinder hole (31). A sealing membrane (33) is provided. A first piston rod (6) and a second piston rod (7) are inserted at both ends of each piston cylinder bore (31). The first piston rod (6) and the second piston rod (7) are spaced apart at one end in the piston cylinder bore (31) and filled with hydraulic oil between them. The other end of the first piston rod (6) is slidably mounted in the annular sliding groove (5) on the active turntable (1), and the other end of the second piston rod (7) is slidably mounted in the annular sliding groove (5) on the driven turntable (2).

2. The coupling device suitable for deep-sea environments according to claim 1, characterized in that, The cross-sectional profile of the annular sliding groove (5) in the extending direction is arc-shaped, and the other ends of the first piston rod (6) and the second piston rod (7) are provided with hemispherical ends (8) that match the annular sliding groove (5).

3. The coupling device suitable for deep-sea environments according to claim 2, characterized in that, A ball groove (81) is provided on the hemispherical end (8), and a ball (82) is rolled and embedded in the ball groove (81).

4. The coupling device suitable for deep-sea environments according to claim 1, characterized in that, The piston cylinder bore (31) has 8 holes.

5. The coupling device suitable for deep-sea environments according to any one of claims 1 to 4, characterized in that, The inner wall of the piston cylinder bore (31) is provided with a sealing ring (9) that matches the first piston rod (6) and the second piston rod (7), and the first piston rod (6) and the second piston rod (7) are both inserted into the corresponding sealing ring (9).

6. The coupling device suitable for deep-sea environments according to claim 5, characterized in that, Multiple sealing rings (9) are provided for both the first piston rod (6) and the second piston rod (7), and the multiple sealing rings (9) are arranged at intervals along the axial direction of the piston cylinder bore (31).

7. The coupling device suitable for deep-sea environments according to claim 6, characterized in that, The sealing ring (9) has an annular opening (91) on one end face in the axial direction. Among the multiple sealing rings (9) corresponding to the first piston rod (6), at least two of the annular openings (91) are arranged in opposite directions and face the two ends of the piston cylinder bore (31), respectively. Among the multiple sealing rings (9) corresponding to the second piston rod (7), at least two of the annular openings (91) are arranged in the same direction and face one side of the first piston rod (6).

8. The coupling device suitable for deep-sea environments according to any one of claims 1 to 4, characterized in that, It also includes a connecting chamber (34), which is coaxially connected to both ends of the central piston cylinder (3) and respectively sleeved on the outside of the active turntable (1) and the driven turntable (2).

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