High-pressure rotary sealing structure connected with cleaning disc in jet type netting cleaning machine

Abstract

The invention discloses a high-pressure rotary sealing structure for connecting a cleaning disc in a jet-type netting cleaning machine, which comprises a rotating shaft, a shell, a limiting component, a wear-resistant sealing component, a water inlet end and a pressing cover, the rotating shaft is rotatably connected through a bearing positioned in the shell, one end of the shell is sealed through a U-shaped sealing ring, and the other end of the shell is sealed through a sealing ring. The wear-resistant sealing part is fixedly embedded in the middle of the inner end of the water inlet end and sleeves one end, far away from the cleaning disc, of the rotating shaft, the limiting part is limited on the inner side of the water inlet end and is provided with a circular-truncated-cone-shaped groove, and the wear-resistant sealing part is provided with a circular-truncated-cone-shaped head pressed into the circular-truncated-cone-shaped groove in a matched mode; the front end of the circular-truncated-cone-shaped head is deformed and tightened, and the shell is filled with lubricating oil. According to the invention, better sealing can be realized while high-speed rotation of the cleaning disc is ensured, high-pressure seawater can be prevented from permeating and influencing internal parts, and the pressure of high-pressure water conveyed internally can be kept.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater net cage net cleaning, and in particular to a high-pressure rotary sealing structure connected to a cleaning disc in a jet-type net cleaning machine. Background Art

[0002] During cage aquaculture, net fouling and severe biofouling increase the risk of cage fatigue failure, net breakage, and damage or displacement of the mooring system. This reduces water exchange inside and outside the cage, reduces dissolved oxygen within the cage, and increases the risk of fish disease. Therefore, cleaning nets during aquaculture is a crucial management measure.

[0003] Currently, deepwater cage aquaculture management relies primarily on traditional manual net cleaning, which takes an average of two to three days to clean a single cage. Furthermore, auxiliary boat cranes and divers are required, resulting in additional cleaning costs and a labor-intensive, time-consuming process. Therefore, the underwater net cleaning machine was designed to effectively address this industrial technical issue.

[0004] The Chinese patent application number 2024104011672 provides a dynamically balanced and stable multi-body net cleaning machine, which is a device that can clean the nets of deep-water cages. It drives the cleaning disc to rotate through the reaction force generated by high-pressure water ejected from the nozzle to achieve the cleaning function. It is a jet-type net cleaning machine.

[0005] However, since the jet-type net cleaning machine is used in the deep sea, in an environment of high-pressure seawater, it is necessary to prevent the infiltration of high-pressure seawater. In addition, the cleaning disc of the net cleaning machine must maintain long-term smooth high-speed rotation, and the high-pressure water in the pipeline must be properly transported to the cleaning disc. This makes the development of the above-mentioned jet-type net cleaning machine a difficulty, namely, how to ensure the high-speed rotation of the cleaning disc in the high-pressure pipeline while reducing the ingress of seawater into the rotating components and reducing pressure loss. The current method for rotating the cleaning disc in the jet-type net cleaning machine is to directly use an O-ring between the rotating shaft and the outer shell to achieve dynamic sealing. This sealing method achieves the high-pressure rotary sealing function to a certain extent, but there is a large amount of high-pressure seawater medium that infiltrates into the rotating components. The reliability of the sealing method is insufficient, which has a negative impact on the reliability of the internal rotating components. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-pressure rotary sealing structure connected to a cleaning disc in a jet-type net cleaning machine, which can achieve better sealing while ensuring high-speed rotation of the cleaning disc, prevent high-pressure seawater from penetrating and affecting internal components, and maintain the pressure of the high-pressure water transported internally.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A high-pressure rotary sealing structure connected to a cleaning disc in a jet-type net cleaning machine is characterized in that it includes a rotating shaft connected to the middle of the cleaning disc, a housing, a limiting component, a wear-resistant sealing component, a water inlet end and a pressing cover. The cleaning disc is provided with a nozzle and a flow channel connected to the nozzle. The center hole of the rotating shaft is connected to the flow channel. The rotating shaft passes through the housing and is rotatably connected through a bearing located in the housing. One end of the housing close to the cleaning disc is sealed by a U-shaped sealing ring, and the other end of the housing is equipped with a water inlet end through the pressing cover. The pressing cover is The water inlet end is pressed inward, and the water inlet hole of the water inlet end is connected with the middle hole of the rotating shaft. The wear-resistant sealing component is fixedly embedded in the middle of the inner end of the water inlet end and is sleeved on the end of the rotating shaft away from the cleaning disk. The limiting component is sleeved on the rotating shaft and is restricted to the inner side of the water inlet end. The wear-resistant sealing component is provided with a truncated cone head, and the limiting component is provided with a truncated cone groove. The truncated cone head is pressed into the truncated cone groove. Under the inward pressure, the front end of the truncated cone head will be deformed and tightened, thereby contacting the rotating shaft to form a seal. The interior of the outer shell is filled with lubricating oil.

[0009] A further technical solution of the present invention is that the angle between the side surface of the truncated cone head and the central axis is smaller than the angle between the side surface of the truncated cone groove and the central axis.

[0010] A further technical solution of the present invention is: the clamping cover is threadedly connected to the end of the shell away from the cleaning disk, a through hole is provided in the middle of the clamping cover, the water inlet end passes through the through hole, and a flange is provided at the inner end of the water inlet end, and the clamping cover is pressed against the flange.

[0011] A further technical solution of the present invention is: an installation groove is provided in the middle of the inner end of the water inlet head, the wear-resistant sealing component is embedded in the installation groove, the wear-resistant sealing component and the installation groove are interference fit, and a first O-ring is provided on the side of the wear-resistant sealing component.

[0012] A further technical solution of the present invention is that there is a clearance fit between the wear-resistant sealing component and the rotating shaft, and between the limiting component and the rotating shaft.

[0013] A further technical solution of the present invention is that the material of the wear-resistant sealing component is wear-resistant plastic, and the material of the limiting component is brass.

[0014] A further technical solution of the present invention is: two bearings are provided on the rotating shaft, and the two bearings respectively abut against the shoulders of the rotating shaft, wherein the bearing close to the U-shaped sealing ring also abuts against the inwardly protruding annular limiting portion of the outer shell, and the limiting component abuts against the other bearing.

[0015] A further technical solution of the present invention is: the high-pressure rotary sealing structure also includes a flange, a water collection groove is provided in the middle of the back of the cleaning disk, the flow channels are connected to the water collection groove, the flange is fixedly installed on the back of the cleaning disk and covers the water collection groove, a second O-ring is provided between the flange and the back of the cleaning disk, and the end of the rotating shaft is threadedly connected to the center hole of the flange.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention seals one end close to the cleaning disc by a U-shaped sealing ring, while the other end where high-pressure water is input is covered by a pressing cover, and realizes effective internal sealing by the deformation of the front end of the frustum-shaped head of the wear-resistant sealing component. That is, without affecting the rotation function of the rotating shaft, it ensures that the high-pressure water input from the water inlet end can enter smoothly, with little water pressure loss, and at the same time prevents seawater from penetrating into the interior and affecting the internal components, thereby solving the problem of operation jamming caused by seawater infiltration during operation and effectively improving the reliability and service life of the net cleaning machine.

[0018] At the same time, the present invention fills the interior of the housing with lubricating oil, which ensures the lubrication of the internal components, allowing the rotating shaft to rotate stably at high speed, and at the same time can isolate a small amount of seawater medium entering from the U-shaped sealing ring, effectively ensuring the normal operation of the internal components.

[0019] (2) During operation, the high-pressure flow between the water inlet end and the rotating shaft will generate a force that pushes the water inlet end outward. The present invention installs the water inlet end by pressing the water inlet end with a pressing cover, which can effectively limit the position of the water inlet end and maintain the pressure of the high-pressure water transported internally.

[0020] The present invention effectively improves the pressure resistance of the net cleaning machine, making the net cleaning machine suitable for underwater net cleaning operations under higher pressure conditions.

[0021] (3) The deformation of the front end of the truncated cone head of the present invention can be controlled by the clamping cover. When the rotational driving torque of the cleaning disk is small (the system water pressure is low), the pressure of the clamping cover on the water inlet end can be reasonably adjusted to reduce the deformation of the front end of the truncated cone head of the wear-resistant sealing component, thereby reducing the rotational resistance torque of the front end of the truncated cone head to the rotating shaft, and at the same time effectively achieving sealing; when the rotational driving torque of the cleaning disk is large (the system water pressure is large), the pressure of the clamping cover on the water inlet end can be reasonably adjusted to increase the deformation of the front end of the truncated cone head of the wear-resistant sealing component, thereby increasing the rotational resistance torque of the front end of the truncated cone head to the rotating shaft, and increasing the sealing effect between the front end of the truncated cone head and the rotating shaft, thereby achieving high-pressure rotary sealing and ensuring that the rotation speed of the cleaning disk is not too fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1is a schematic cross-sectional view of a high-pressure rotary seal structure according to an embodiment of the present invention;

[0023] Figure 2 2 is a schematic structural diagram of the connection between the wear-resistant sealing component and the limiting component according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic structural diagram of a U-shaped sealing ring connection according to an embodiment of the present invention;

[0025] Figure 4 1 is a schematic structural diagram of a flange connection according to an embodiment of the present invention;

[0026] Figure 5 It is a front schematic diagram of a high-pressure rotary seal structure according to an embodiment of the present invention.

[0027] Meaning of the reference numerals in the figure:

[0028] 1-Water inlet end; 1.1-Water inlet hole; 1.2-Mounting groove; 1.3-Flange; 2-Tightening cover; 2.1-Circular wall; 2.2-Perforation; 3-Outer casing; 3.1-Annular limiting part; 4-Rotating shaft; 4.1-Shaft shoulder; 4.2-Middle hole of rotating shaft; 5-U-shaped sealing ring; 6-Wear-resistant sealing component; 6.1-Frustum-shaped head; 7-Limiting component; 7.1-Circular tube; 7.2-Frustum-shaped groove; 7.3-Protruding ring; 8-Flange; 8.1-Circular boss; 8.2-Threaded middle hole; 9-Cleaning plate; 9.1-Water collection trough; 9.2-Flow channel; 10-Bearing; 11-First O-ring; 12-Second O-ring; 13-Nozzle; 14-Fixing bolt. DETAILED DESCRIPTION

[0029] The present invention is further described below with reference to the embodiments.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] Example:

[0034] like Figures 1 to 5 The figure shows a high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine of this embodiment, which includes a rotating shaft 4, a shell 3, a limiting component 7, a wear-resistant sealing component 6, a water inlet end 1, a clamping cover 2 and a flange 8.

[0035] In this embodiment, the front of the cleaning disc 9 is equipped with four nozzles 13, evenly distributed on all four sides. The spray direction of the nozzles 13 forms a predetermined angle with the cleaning disc 9, so that the reaction force generated by the water flow from the nozzles 13 can drive the cleaning disc 9 to rotate at high speed. The interior of the cleaning disc 9 is provided with a flow channel 9.2 connected to the nozzles 13. A circular concave water collection groove 9.1 is provided in the middle of the back of the cleaning disc 9. The flow channels 9.2 are connected to the water collection groove 9.1.

[0036] The flange 8 is installed in the middle of the back of the cleaning plate 9 and covers the water tank 9.1. Figure 4 As shown, a circular boss 8.1 is provided in the center of the flange 8, which fits into the water collection channel 9.1. The flange 8 and the cleaning pan 9 are fixedly connected by fixing bolts 14. Specifically, fixing bolts 14 pass through connecting holes in the cleaning pan 9 and connect with threaded holes in the flange 8. A second O-ring 12 is provided between the backs of the flange 8 and the cleaning pan 9, providing a seal between the flange 8 and the cleaning pan 9.

[0037] Flange 8 has a threaded center hole 8.2, and the end of rotating shaft 4 is threadedly connected to threaded center hole 8.2 of flange 8, achieving a seal through the threaded connection. Threaded center hole 8.2 of flange 8 communicates with water collection groove 9.1, and center hole 4.2 of rotating shaft also communicates with water collection groove 9.1, thereby connecting center hole 4.2 of rotating shaft to flow channel 9.2.

[0038] The housing 3 of this embodiment is in the shape of a circular tube, and the rotating shaft 4 passes through the housing 3. Figure 3 As shown, an inwardly protruding annular limiting portion 3.1 is provided at one end of the housing 3 close to the cleaning disc 9, and a U-shaped sealing ring 5 is provided between the annular limiting portion 3.1 and the rotating shaft 4 to form a seal.

[0039] In this embodiment, two bearings 10 are provided on the rotating shaft 4. The inner rings of the two bearings 10 respectively abut against the shaft shoulder 4.1 of the rotating shaft 4. Both bearings 10 are located inside the housing 3. The outer rings of the bearings 10 contact the inner wall of the housing 3, and the rotating connection between the rotating shaft 4 and the housing 3 is achieved through the bearings 10. The outer ring of the bearing 10 closest to the U-shaped sealing ring 5 abuts against the annular stop 3.1 of the housing 3. The other bearing 10 is located closer to the end of the housing 3 away from the cleaning disk 9.

[0040] The limiting component 7, the wear-resistant sealing component 6, the water inlet end 1, and the pressing cover 2 are all arranged at the end of the housing 3 away from the cleaning disk 9. The inner side of the pressing cover 2 is provided with an internal thread, and the end of the housing 3 away from the cleaning disk 9 is provided with an external thread. The pressing cover 2 is threadedly connected to the end of the housing 3 away from the cleaning disk. By rotating the pressing cover 2, the pressing force of the pressing cover 2 on the water inlet end 1 can be adjusted.

[0041] The compression cap 2 has a central hole 2.2, the outer end of which is a circular wall 2.1. The water inlet terminal 1 is cylindrical and passes through the hole 2.2 in the compression cap 2. The outer end of the water inlet terminal 1 is connected to the high-pressure water pipe of the jet-type net cleaning machine. The inner end of the water inlet terminal 1 is provided with a flange 1.3, against which the compression cap 2 abuts, pressing the water inlet terminal 1 inward. The center of the water inlet terminal 1 is provided with a water inlet hole 1.1, which communicates with the center hole 4.2 of the rotating shaft.

[0042] like Figure 2 As shown, a circular mounting groove 1.2 is provided at the middle of the inner end of the water inlet end 1 of this embodiment. The wear-resistant sealing component 6 is cylindrical in shape and is embedded in the mounting groove 1.2. There is an interference fit between the wear-resistant sealing component 6 and the mounting groove 1.2, and a first O-ring 11 is provided on the side of the wear-resistant sealing component 6 to ensure a sealed connection between the wear-resistant sealing component 6 and the water inlet end 1. The input high-pressure water will not leak from the connection between the wear-resistant sealing component 6 and the water inlet end 1. The wear-resistant sealing component 6 is provided with a central hole, through which the wear-resistant sealing component 6 is sleeved on the end of the rotating shaft 4 away from the cleaning disk 9. There is a clearance fit between the central hole of the wear-resistant sealing component 6 and the rotating shaft 4, and the rotating shaft 4 does not drive the wear-resistant sealing component 6 to rotate together.

[0043] In this embodiment, the limiting component 7 has a central hole. It is inserted through the central hole onto the rotating shaft 4 and positioned between the water inlet end 1 and the bearing 10. The central hole of the limiting component 7 and the rotating shaft 4 form a clearance fit, so the rotating shaft 4 does not rotate the limiting component 7. A raised ring 7.3 is provided on the end face of the limiting component 7 near the bearing 10. Under inward pressure, the raised ring 7.3 of the limiting component 7 abuts against the outer ring of the bearing 10.

[0044] like Figure 2As shown, in this embodiment, the wear-resistant sealing component 6 is provided with a truncated cone-shaped head 6.1 at one end near the limiting component 7. A circular tube portion 7.1 is provided in the middle of the end surface of the limiting component 7 near the wear-resistant sealing component 6. A portion of the circular tube portion 7.1 is embedded in the mounting groove 1.2. The circular tube portion 7.1 is provided with an inwardly concave truncated cone-shaped groove 7.2 at one end near the wear-resistant sealing component 6. The truncated cone-shaped head 6.1 is pressed into the truncated cone-shaped groove 7.2. The inclined side surface of the truncated cone-shaped head 6.1 contacts the inclined side surface of the truncated cone-shaped groove 7.2. Under the inward pressure, the front end of the truncated cone-shaped head 6.1 is deformed and tightened, thereby contacting and sealing the rotating shaft 4. The angle between the side surface of the truncated cone-shaped head 6.1 and the central axis is smaller than the angle between the side surface of the truncated cone-shaped groove 7.2 and the central axis.

[0045] The deformation of the front end of the truncated cone 6.1 is controlled by the pressure of the clamping cover 2. When the rotational driving torque of the cleaning disk 9 is small (the system water pressure is low), the pressure of the clamping cover 2 on the water inlet end 1 can be reasonably reduced to make the front end of the truncated cone 6.1 of the wear-resistant sealing component 6 deform slightly, thereby reducing the rotational resistance torque of the front end of the truncated cone 6.1 to the rotating shaft 4 and at the same time effectively achieving sealing; when the rotational driving torque of the cleaning disk 9 is large (the system water pressure is large), the pressure of the clamping cover 2 on the water inlet end 1 can be reasonably increased to make the front end of the truncated cone 6.1 of the wear-resistant sealing component 6 deform significantly, thereby increasing the rotational resistance torque of the front end of the truncated cone 6.1 to the rotating shaft 4 and increasing the sealing effect between the front end and the rotating shaft 4, thereby achieving high-pressure rotary sealing and ensuring that the rotation speed of the cleaning disk 9 is not too fast.

[0046] The material of the limiting component 7 of this embodiment is brass, and the material of the wear-resistant sealing component 6 is wear-resistant plastic. The wear-resistant sealing component 6 is a consumable part and needs to be replaced after a certain period of use.

[0047] A sealed cavity is formed inside the housing 3. In this embodiment, the housing 3 is filled with lubricating oil. The filling of lubricating oil ensures the lubrication of internal components such as the limit components and bearings, so that the rotating shaft 4 can rotate stably at high speed. At the same time, it can isolate the small amount of seawater medium entering through the U-shaped sealing ring 5, effectively ensuring the normal operation of the internal components.

[0048] When the high-pressure rotary seal structure of this embodiment is used in a jet-type net cleaning machine, the housing 3 is fixedly mounted on the machine's rigid frame, and the outer end of the water inlet 1 is connected to the machine's high-pressure water pipeline. During operation, high-pressure water enters the water inlet 1, then passes through the central hole of the rotating shaft 4 into the flow channel 9.2 of the cleaning disc 9, and is finally ejected from the nozzle 13. The reaction force of the ejected water flow propels the cleaning disc 9 to rotate at high speed. The high-pressure flow between the water inlet 1 and the rotating shaft 4 generates a force that pushes the water inlet 1 outward, while the clamping cap 2 effectively restricts the position of the water inlet 1 and maintains the pressure of the high-pressure water being transported internally.

[0049] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the implementation methods of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A high-pressure rotary seal structure connected to a cleaning disk in a jet-type net cleaning machine, characterized by: The invention comprises a rotating shaft connected to the middle part of the cleaning disc, a shell, a limiting component, a wear-resistant sealing component, a water inlet end and a pressing cover. The cleaning disc is provided with a nozzle and a flow channel connected to the nozzle. The middle hole of the rotating shaft is connected to the flow channel. The rotating shaft passes through the shell and is rotatably connected through a bearing located in the shell. One end of the shell close to the cleaning disc is sealed by a U-shaped sealing ring. The other end of the shell is equipped with the water inlet end through the pressing cover. The pressing cover presses the water inlet end inward. The water inlet end is The water hole is connected with the middle hole of the rotating shaft. The wear-resistant sealing component is fixedly embedded in the middle of the inner end of the water inlet end and is sleeved on the end of the rotating shaft away from the cleaning disk. The limiting component is sleeved on the rotating shaft and is limited to the inner side of the water inlet end. The wear-resistant sealing component is provided with a truncated cone head. The limiting component is provided with a truncated cone groove. The truncated cone head is pressed into the truncated cone groove. Under the inward pressure, the front end of the truncated cone head will be deformed and tightened, thereby contacting the rotating shaft to form a seal. The interior of the outer shell is filled with lubricating oil.

2. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: The included angle between the side surface of the truncated cone head and the central axis is smaller than the included angle between the side surface of the truncated cone groove and the central axis.

3. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: The pressing cover is threadedly connected to the end of the shell away from the cleaning disk. A through hole is provided in the middle of the pressing cover, and the water inlet end passes through the through hole. A flange is provided at the inner end of the water inlet end, and the pressing cover is pressed against the flange.

4. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: A mounting groove is provided in the middle of the inner end of the water inlet head, and the wear-resistant sealing component is embedded in the mounting groove. There is an interference fit between the wear-resistant sealing component and the mounting groove, and a first O-ring is provided on the side of the wear-resistant sealing component.

5. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: There is a clearance fit between the wear-resistant sealing component and the rotating shaft, and between the limiting component and the rotating shaft.

6. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: The material of the wear-resistant sealing component is wear-resistant plastic, and the material of the limiting component is brass.

7. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: Two bearings are provided on the rotating shaft, and the two bearings respectively abut against the shoulders of the rotating shaft. The bearing close to the U-shaped sealing ring also abuts against the inwardly protruding annular limiting portion of the outer shell, and the limiting component abuts against the other bearing.

8. The high-pressure rotary sealing structure connected to the cleaning disk in the jet-type net cleaning machine according to claim 1, characterized in that: The high-pressure rotary sealing structure also includes a flange, a water collection groove is provided in the middle of the back of the cleaning disk, and the flow channels are all connected to the water collection groove. The flange is fixedly installed on the back of the cleaning disk and covers the water collection groove. A second O-ring is provided between the flange and the back of the cleaning disk, and the end of the rotating shaft is threadedly connected to the center hole of the flange.

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