Underwater sealing structure

Abstract

The utility model relates to the field of underwater sealing, in particular to an underwater sealing structure which is arranged between main equipment and a connecting shaft, the main equipment is connected with the connecting shaft through a bearing, the connecting shaft comprises a flange plate and a shaft body, and the underwater sealing structure is arranged between the bearing and the flange plate. The underwater sealing structure comprises a plurality of V-shaped ring sealing structures arranged between the main equipment and the flange plate, a plurality of framework oil seal sealing structures arranged between the main equipment and the shaft body, and pressure maintaining sealing structures arranged between every two adjacent V-shaped ring sealing structures and / or between every two adjacent framework oil seal sealing structures. The sealing structure has the advantages that through the combination of the inner and outer sealing piece V-shaped rings and the two sealing piece framework oil seals and the design of two pressure maintaining sealing structures, the sealing structure is not only suitable for the situation that the outer pressure in a deep water area is higher than the inner pressure, but also suitable for the situation that the inner pressure and the outer pressure in a shallow water area are similar, and meanwhile suitable for the complex working condition that rear equipment is dragged and connected to run.

Description

TECHNICAL FIELD

[0001] The utility model relates to underwater sealing field especially relates to a kind of underwater sealing structure. BACKGROUND

[0002] In the field of underwater sealing, there is an underwater sealing structure, mainly used for connecting working equipment immersed in water, which needs to prevent water and sundries from entering the main equipment, while preventing the lubricating liquid and other oil in the main equipment from leaking, maintaining the sealing effect of the joint between the main equipment and the working equipment, and also needs to withstand certain underwater pressure.

[0003] The prior art, such as the sealing structure and the sealing design of the underwater sealing device disclosed in Chinese patent application CN117605834A, squeezes and deforms the non-metallic sealing ring at the joint by the pressure difference between the inside and outside of the pipeline to fill the gap between the joint.

[0004] However, in shallow water areas where the inside and outside pressure difference is not large, the non-metallic sealing member cannot be squeezed and deformed to fill the gap at the joint, resulting in leakage, and the inner ring of the sealing member cannot be rubbed, continuously rotated and connected with the working equipment.

[0005] Based on this, the present case is proposed. UTILITY MODEL CONTENT

[0006] The utility model aims to provide an improved underwater sealing structure that is more suitable for various working environments of underwater equipment.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0008] An underwater sealing structure is arranged between a main equipment and a connecting shaft, the main equipment and the connecting shaft are connected through a bearing, the connecting shaft includes a flange and a shaft body, the underwater sealing structure is arranged between the bearing and the flange, and the underwater sealing structure includes a plurality of V-shaped ring sealing structures arranged between the main equipment and the flange, a plurality of skeleton oil seal sealing structures arranged between the main equipment and the shaft body, and a pressure maintaining sealing structure arranged between adjacent two V-shaped ring sealing structures and / or adjacent two skeleton oil seal sealing structures.

[0009] Further, one of the V-shaped ring sealing structures is located at the outermost side of the joint between the main equipment and the flange, and includes a groove one opened on the main equipment and a sealing member V-shaped ring one installed in the groove one, the main body of the sealing member V-shaped ring one is tightly attached to the groove one, and the lip is tightly attached to the connecting shaft.

[0010] Further, one of the V-ring sealing structures is located at the innermost side of the connection between the main device and the flange, comprising a groove two on the flange and a sealing member V-ring two installed in the groove two, the main body of the sealing member V-ring two is close to the groove two, and the lip is close to the main device.

[0011] Further, the pressure maintaining sealing structure between the adjacent two V-ring sealing structures comprises annular V-shaped grooves and annular V-shaped protrusions arranged on the main device and the flange, the annular V-shaped grooves and the annular V-shaped protrusions on the main device are arranged alternately, and the annular V-shaped grooves and the annular V-shaped protrusions on the flange are arranged alternately.

[0012] The annular V-shaped grooves on the main device are opposite to the annular V-shaped protrusions on the flange and keep a gap, the annular V-shaped protrusions on the main device are opposite to the annular V-shaped grooves on the flange and keep a gap, and all the gaps form a zigzag-shaped flow channel connecting the adjacent two V-ring sealing structures.

[0013] Further, the corner angle of the zigzag-shaped flow channel is 90°.

[0014] Further, one of the skeleton oil seal sealing structures is located at the side of the flange of the connection between the main device and the shaft, comprising a groove three on the main device and a sealing member skeleton oil seal one installed in the groove three, the sealing member skeleton oil seal one is interference fitted into the groove three and tightly holds the shaft, and the lip is directed to the flange side; the sealing member skeleton oil seal one has two or more than two.

[0015] Further, one of the skeleton oil seal sealing structures is located at the side of the bearing of the connection between the main device and the shaft, comprising a groove four on the main device and a sealing member skeleton oil seal two installed in the groove four, the sealing member skeleton oil seal two is interference fitted into the groove four and tightly holds the shaft, and the lip is directed to the bearing side; the sealing member skeleton oil seal two has one or more than one.

[0016] Further, the shaft at the skeleton oil seal sealing structure is a light shaft.

[0017] Further, the pressure maintaining sealing structure between the adjacent two skeleton oil seal sealing structures comprises a plurality of semicircular ring grooves on the main device and a plurality of semicircular ring grooves on the shaft, the semicircular ring grooves on the main device and the semicircular ring grooves on the shaft are arranged opposite to each other one by one.

[0018] The semicircular ring grooves store buffer medium.

[0019] Further, the buffer medium adopts lubricant.

[0020] The utility model discloses a advantage lies in: through the combination of two groups of sealing element V type ring, two groups of sealing element skeleton oil seal, the design of collocating two pressure -maintaining sealing structures, not only be applicable to the situation that the external pressure of deep water area is higher than internal pressure, also be applicable to the situation that internal and external pressure of shallow water area is similar, complex working condition of the device operation after the tow connection is suitable simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the schematic diagram of the construction of underwater sealing structure in the embodiment;

[0022] Figure 2 It is the schematic diagram of the construction of underwater sealing structure in the embodiment; Figure 1

[0023] Figure 3 It is the schematic diagram of the construction of underwater sealing structure in the embodiment; Figure 1

[0024] Figure 4 It is the sectional schematic diagram of sealing element skeleton oil seal in the embodiment;

[0025] REFERENCE SIGNS

[0026] 1, main device;2, bearing;301, shaft body;302, flange plate;4, recess one;5, sealing element V type ring one;6, recess two;7, sealing element V type ring two;8, annular V type recess;9, annular V type protrusion;10, broken line type flow channel;11, recess three;12, sealing element skeleton oil seal one;13, recess four;14, sealing element skeleton oil seal two;15, semicircular annular groove;16, metal skeleton;17, spring. DETAILED DESCRIPTION

[0027] The application will be further described in detail below in conjunction with the embodiments, and it is understood that the orientation or position relationship of the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like in the text is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation.

[0028] The embodiment proposes an underwater sealing structure, as shown in the figure, the underwater sealing structure is arranged between main device 1 and connecting shaft. Figure 1 The main device 1 and the connecting shaft are connected through the bearing 2, the connecting shaft includes the flange plate 302 and the shaft body 301, and the underwater sealing structure is arranged between the bearing 2 and the flange plate 302.

[0029] ​​The underwater sealing structure comprises two V-ring sealing structures arranged between the main device 1 and the flange 302, two skeleton oil seal sealing structures arranged between the main device 1 and the shaft body 301, a first pressure maintaining sealing mechanism arranged between the two adjacent V-ring sealing structures, and a second pressure maintaining sealing structure arranged between the two adjacent skeleton oil seal sealing structures.

[0030] As shown in Figure 2 , one of the V-ring sealing structures is located at the outermost side of the connection between the main device 1 and the flange 302, and comprises a groove 4 arranged on the main device 1 and a sealing element V-ring 5 arranged in the groove 4, the main body of the sealing element V-ring 5 is tightly attached to the groove 4, and the lip is tightly attached to the connecting shaft. This V-ring sealing structure is also called a first sealing, and when the main device 1 is submerged in water for work, the first sealing can block most of the silt and sand under water, and can also buffer a part of the water flow pressure.

[0031] As shown in Figure 2 , the other V-ring sealing structure is located at the innermost side of the connection between the main device 1 and the flange 302, and comprises a groove 6 arranged on the flange 302 and a sealing element V-ring 7 arranged in the groove 6, the main body of the sealing element V-ring 7 is tightly attached to the groove 6, and the lip is tightly attached to the main device 1. This V-ring sealing structure is also called a second sealing, which is used to block the residual water when the water flow pressure suddenly rises and breaks through the sealing element V-ring 1 when the main device 1 is running at high speed.

[0032] Referring to Figure 2 , the first pressure maintaining sealing mechanism arranged between the two adjacent V-ring sealing structures comprises annular V-shaped grooves 8 and annular V-shaped protrusions 9 arranged on the main device 1 and the flange 302, the annular V-shaped grooves 8 and the annular V-shaped protrusions 9 on the main device 1 are arranged alternately, and the annular V-shaped grooves 8 and the annular V-shaped protrusions 9 on the flange 302 are arranged alternately. The annular V-shaped groove 8 on the main device 1 is opposite to the annular V-shaped protrusion 9 on the flange 302 and maintains a gap, and the annular V-shaped protrusion 9 on the main device 1 is opposite to the annular V-shaped groove 8 on the flange 302 and maintains a gap. All the gaps are connected to form a zigzag flow channel between the two adjacent V-ring sealing structures, in the embodiment, the turning angle of the zigzag flow channel is 90°, and when the water flow that breaks through the first sealing enters the zigzag flow channel 10, it will bear 25% of the reaction force every time it passes through a turning angle, so that the water pressure impact is released with 1 / 4 of the reaction force. When the water flow experiences two or more turning angles, the pressure is less than 30% of the initial pressure, which better realizes the balance of the internal and external pressures and prolongs the service life of the sealing element.

[0033] As shown in Figure 3As shown in the figure, one of the skeleton oil seal sealing structures is located at the side of the flange 302 of the main device 1 and the shaft body 301 connection, including the groove three 11 opened on the main device 1 and the sealing skeleton oil seal one 12 installed in the groove three 11, the sealing skeleton oil seal one 12 is interference fitted into the groove three 11 and tightly holds the shaft body 301, and the lip is towards the flange 302 side. In this embodiment, the sealing skeleton oil seal one 12 has two pieces. As shown in the figure, Figure 4 As shown in the figure, the sealing skeleton oil seal one 12 is inlaid with a specially designed metal skeleton 16 inside, so that it will not be deformed when interference fitted into the groove three 11 of the main device 11, and a spring 17 is provided at the lip for tightly holding the connecting shaft, and the lip is outwardly for protecting the external water from entering the main device 1. The skeleton oil seal sealing structure at this place is also called three-stage sealing.

[0034] As shown in the figure, Figure 3 Another of the skeleton oil seal sealing structures is located at the side of the bearing 2 of the main device 1 and the shaft body 301 connection, including the groove four 13 opened on the main device 1 and the sealing skeleton oil seal two 14 installed in the groove four 13, the sealing skeleton oil seal two 14 is interference fitted into the groove four 13 and tightly holds the shaft body 301, and the lip is towards the bearing 2 side; the sealing skeleton oil seal two 14 is provided with one piece. As shown in the figure, Figure 4 As shown in the figure, the sealing skeleton oil seal two 14 is inlaid with a specially designed metal skeleton 16 inside, so that it will not be deformed when interference fitted into the groove four 13 of the main device 11, and a spring 17 is provided at the lip for tightly holding the connecting shaft, and the lip is inwardly to protect the gear lubricating liquid in the main device 1 from leaking out. The skeleton oil seal sealing structure at this place is also called four-stage sealing.

[0035] As a preferred, the shaft body 301 at the skeleton oil seal sealing structure is a light shaft, which will not scratch the sealing skeleton oil seal when the connecting shaft works and rotates.

[0036] Continuing to refer to Figure 3 The two-stage pressure maintaining sealing mechanism located between the two skeleton oil seal sealing structures, including a plurality of semicircular ring grooves 15 opened on the main device 1 and a plurality of semicircular ring grooves 15 opened on the shaft body 301, the semicircular ring grooves 15 on the main device 1 and the semicircular ring grooves 15 on the shaft body 301 are correspondingly and oppositely arranged, and the semicircular ring grooves 15 store lubricating medium. The two-stage pressure maintaining sealing mechanism is used to keep the pressure balance on both sides, and can lubricate and protect the lip of the sealing skeleton oil seal to prevent abrasion.

[0037] The embodiment can be more suitable for the complex working environment of connecting underwater working devices under various conditions by reasonably arranging the sealing structure, multi-stage hierarchy, and staggered horizontal and vertical sealing.

[0038] The above examples are only used to explain the concept of the present application, and are not intended to limit the scope of protection of the present application. Any non-essential modifications to the present application using the concept should fall within the scope of protection of the present application.

Claims

1. An underwater seal structure provided between a main device and a connecting shaft, the main device and the connecting shaft being connected through a bearing, the connecting shaft including a flange and a shaft body, the underwater seal structure being provided between the bearing and the flange, characterized in that, The underwater sealing structure comprises several V-shaped ring sealing structures arranged between the main device and the flange, several skeleton oil seal sealing structures arranged between the main device and the shaft body, and pressure maintaining sealing structures arranged between adjacent two V-shaped ring sealing structures and / or adjacent two skeleton oil seal sealing structures.

2. An underwater seal according to claim 1, wherein One of the V-shaped ring sealing structures is located at the outermost side of the connection between the main device and the flange, and comprises a groove one arranged on the main device and a sealing member V-shaped ring one arranged in the groove one, wherein the main body of the sealing member V-shaped ring one is tightly attached to the groove one, and the lip is tightly attached to the connecting shaft.

3. An underwater seal according to claim 1, wherein, One of the V-shaped ring sealing structures is located at the innermost side of the connection between the main device and the flange, and comprises a groove two arranged on the flange and a sealing member V-shaped ring two arranged in the groove two, wherein the main body of the sealing member V-shaped ring two is tightly attached to the groove two, and the lip is tightly attached to the main device.

4. An underwater seal according to claim 1, wherein, The pressure maintaining sealing structure between the adjacent two V-shaped ring sealing structures comprises annular V-shaped grooves and annular V-shaped protrusions arranged on the main device and the flange, wherein the annular V-shaped grooves and the annular V-shaped protrusions on the main device are arranged alternately, and the annular V-shaped grooves and the annular V-shaped protrusions on the flange are arranged alternately. The annular V-shaped grooves on the main device are opposite to the annular V-shaped protrusions on the flange and keep a gap, the annular V-shaped protrusions on the main device are opposite to the annular V-shaped grooves on the flange and keep a gap, and all the gaps form a zigzag-shaped flow channel connecting the adjacent two V-shaped ring sealing structures.

5. An underwater seal structure as claimed in claim 4, wherein The corner angle of the zigzag-shaped flow channel is 90°.

6. An underwater seal according to claim 1, wherein, One of the skeleton oil seal sealing structures is located at the side of the flange of the connection between the main device and the shaft body, and comprises a groove three arranged on the main device and a sealing member skeleton oil seal one arranged in the groove three, wherein the sealing member skeleton oil seal one is interference-fitted into the groove three and tightly holds the shaft body, and the lip is directed to the flange side; the sealing member skeleton oil seal one has two or more than two pieces.

7. An underwater seal according to claim 1, wherein, One of the skeleton oil seal sealing structures is located at the side of the bearing of the connection between the main device and the shaft body, and comprises a groove four arranged on the main device and a sealing member skeleton oil seal two arranged in the groove four, wherein the sealing member skeleton oil seal two is interference-fitted into the groove four and tightly holds the shaft body, and the lip is directed to the bearing side; the sealing member skeleton oil seal two has one or more than one piece.

8. An underwater seal according to claim 1, wherein, The shaft body at the skeleton oil seal sealing structure is a light shaft.

9. An underwater seal structure as claimed in claim 1, wherein The pressure maintaining sealing structure between the adjacent two skeleton oil seal sealing structures comprises several semicircular ring grooves arranged on the main device and several semicircular ring grooves arranged on the shaft body, wherein the semicircular ring grooves on the main device and the semicircular ring grooves on the shaft body are arranged in pairs and opposite to each other. The semicircular ring grooves store a buffer medium.

10. An underwater seal structure as claimed in claim 9, wherein The buffer medium is a lubricant.

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