Sealing system for lifting type propeller
By introducing automatic inflation and push-pull mechanisms into the lifting thruster sealing system, real-time expansion and automatic switching of the sealing ring are achieved, which solves the problems of degradation of sealing performance and difficulty in replacement, and improves the adaptability and operational convenience of the sealing system.
Patent Information
- Application Number
- CN202411992754.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-08-01
AI Technical Summary
The existing lifting thruster sealing system is not convenient for real-time expansion of the sealing ring, resulting in a degradation of sealing performance and difficulty in replacing the sealing ring, especially in underwater environments, which is expensive to replace.
A sealing system including a driving mechanism, a sealing seat, an airbag ring and an automatic inflation mechanism is designed. The movable block drives the movable rod downward, expands the sealing ring in real time, and uses a pressure sensor and a push and pull mechanism to achieve automatic switching and inflation of the sealing ring to ensure the sealing effect.
Real-time adaptive expansion of the sealing ring is achieved, the sealing performance is extended, the sealing ring replacement process is simplified, the replacement cost is reduced, and the stability and efficiency of the sealing system are maintained.
Smart Images
Figure CN120397228A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of ship propellers, and specifically relates to a sealing system for a lifting propeller. Background Technique
[0002] A marine propeller is a device that converts the power of a ship's main engine (such as a diesel engine, an electric motor, etc.) into the propulsion force of the ship. Its function is to push the ship to sail in the water and is a key component of the ship's power system. Among them, a lifting propeller can be applicable to scenarios with different depths and hull specifications. On this basis, a slewing mechanism is also equipped to adjust the propulsion angle of the propeller. Most of the slewing mechanism and the propeller are placed in the water, so the sealing performance requirements are relatively high. However, the existing propeller sealing system has the following problems when in use: The propeller sealing system mainly provides sealing through high-quality sealing rings during its slewing. However, the existing propeller sealing system is not convenient for real-time amplification of the sealing rings. Each slewing will cause wear to the sealing rings. After a long time, the sealing performance of the sealing rings will gradually decline and need to be replaced after a period of use, which is time-consuming and laborious. Further, the existing propeller sealing system is not convenient for automatic replacement of the sealing rings. Although high-quality sealing rings are used to extend their maintenance time, subsequent replacement usually requires manual cooperation. However, most propellers are located in the water, and the replacement cost is relatively high.
[0003] In view of the above problems, there is an urgent need to innovate and design on the basis of the original propeller sealing system. Summary of the Invention
[0004] The purpose of the present invention is to provide a sealing system for a lifting propeller to solve the problems in the above-mentioned background technique that the existing propeller sealing system is not convenient for real-time amplification of the sealing rings and is not convenient for automatic replacement of the sealing rings. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single.
[0005] To achieve the above purpose, the present invention provides the following technical solution: A sealing system for a lifting propeller, including a base, a driving mechanism is arranged inside the base, and the bottom of the driving mechanism is connected to a sealing seat through a rotating shaft. The sealing seat rotates in a fitting manner in the bottom cavity of the base, and a propeller is fixed to the bottom of the sealing seat; It also includes a sealing ring which is sleeved in the outer cavity of the sealing seat. An airbag ring is fitted inside the sealing ring, and the airbag ring is embedded and limitedly installed in the sealing seat. A threaded rod is vertically installed in the inner cavity of the sealing seat, and a fixing seat is threadedly sleeved on the threaded rod. The threaded rod is driven by a motor. An inflation frame is circumferentially arranged inside the sealing seat, and the outer inflation port of the inflation frame is sleeved on the inner one-way inflation port of the airbag ring. A push-pull mechanism is arranged between the inflation frame and the fixing seat, and the push-pull mechanism is used to adjust the lateral position of the inflation frame. A first hydraulic chamber and a second hydraulic chamber are respectively formed in the middle and inside of the fixing seat. The outer bottom of the first hydraulic chamber is connected to the inner end of the second hydraulic chamber, and a second piston rod is installed at the top of the first hydraulic chamber. A first piston rod is slidably fitted inside the second hydraulic chamber, and the outer end of the first piston rod is slidably fitted inside the inflation frame. A pressure sensor is fixed at the protruding position on the top of the fixing seat, and the pressure sensor is located on the movement track of the contact block, and the contact block is fixed on the outer side of the top of the second piston rod; An automatic inflation mechanism is arranged between the sealing seat and the base, and the automatic inflation mechanism is used to inflate the airbag ring following the rotation of the sealing seat.
[0006] Preferably, the sealing rings are vertically and equally spacedly sleeved and distributed on the outer side of the sealing seat. Except for the lowermost sealing ring, the other top sealing rings do not contact the inner wall of the bottom cavity of the base.
[0007] Preferably, the push-pull mechanism includes a toothed roller which is embedded and installed in the fixing seat. A toothed ring is meshed with the inner side of the toothed roller, and the toothed roller is driven by a motor. A push head is fixed at the bottom of the outer side of the toothed ring, and a mounting rod is arranged on the movement track of the push head. The mounting rod is horizontally and slidably penetrated through the fixing seat by an elastic telescopic rod, and the outer end of the mounting rod is fixed to the inflation frame.
[0008] Preferably, the push heads are designed as arc-shaped structures and are equally angularly distributed on the outer side of the toothed ring, and the number of distributed push heads corresponds to the number of distributed inflation frames.
[0009] Preferably, the contact blocks are vertically and equally spacedly distributed on the second piston rod, and the number of distributed contact blocks corresponds to the number of sealing rings, and the distance between adjacent contact blocks corresponds to the distance between adjacent sealing rings.
[0010] Preferably, the automatic inflation mechanism includes a fixed plate fixed to the top of the contact block, and a push rod is fixed to the outside of the fixed plate. The top of the push rod is sleeved with a movable rod through a first spring, and a limiting rod is embedded and installed at the inner wall of the cavity at the bottom of the movable rod through a second spring. One end of the limiting rod is located in a limiting groove, and the limiting groove is opened on the outside of the push rod. The limiting rod is movably arranged in a movable groove, and the movable groove is opened inside the base, and a movable block is fixed on the inner wall of the movable groove.
[0011] Preferably, the movable rod elastically slides vertically on the push rod through the first spring, and the sliding distance of the movable rod corresponds to the distance between adjacent limiting grooves.
[0012] Preferably, the inner end of the limiting rod is designed in a right trapezoidal structure, and the inner end of the limiting rod is in concave-convex fit with the limiting groove, and the limiting grooves are vertically and equally spaced on the push rod. The inclined surface of the inner end of the limiting rod is arranged upward.
[0013] Preferably, multiple groups of movable blocks are vertically and equally spaced in the movable groove, and the vertical distribution law of the movable blocks corresponds to that of the sealing ring. Each group of movable blocks is equally angularly distributed in the movable groove. The bottom of the movable block is designed in an arc structure, and the bottom of the movable block corresponds to the top of the movable rod.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. It can perform real-time automatic expansion of the sealing ring. As the sealing seat rotates, the movable block can drive the movable rod to move downward, and then the gas in the inflation frame is filled into the airbag ring, causing the airbag ring to expand and expand the sealing ring. During this process, the wear of the sealing ring is affected by the rotation of the sealing seat. Therefore, during its rotation, the downward movement of the movable rod can be realized corresponding to the number of rotations and the rotation angle. Along with the reset of the movable rod and the single downward movement of the drive push rod, continuous adaptive inflation of the airbag ring can be performed, realizing stable expansion operation of the sealing ring, enabling it to maintain a long-term sealing effect. The whole process is adapted to the rotation of the sealing seat, further improving the real-time adaptive expansion effect of the sealing ring; 2. In the present invention, the downward movement distance of the second piston rod corresponds to the expansion degree of the sealing ring. A pressure sensor is arranged at the corresponding position on the second piston rod. Through its force sensing, the expansion degree of the sealing ring can be correspondingly obtained, and then the expansion situation of the sealing ring can be timely feedback, which is convenient for replacing the position of the fixed seat to make it correspond to the position of the new sealing ring above. Then, by using the cooperation of each component in the fixed seat again, the new airbag ring is inflated, and then the new sealing ring is expanded. The whole process only needs to switch the position of the sealing seat, and its supporting inflation mechanism can continue to be used stably. The operation is simple, and the new sealing ring has no wear in the initial state and can be used brand new. At the same time, using the wear gap of the old sealing ring, the new sealing ring can be pushed into the sealed state, the switching is smooth, and the overall continuous sealing effect will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic front sectional structure view of the present invention; Figure 2 is a schematic installation structure view of the sealing seat of the present invention; Figure 3 is a schematic front sectional structure view of the sealing seat of the present invention; Figure 4 is a schematic front sectional structure view of the fixed seat of the present invention; Figure 5 For the present invention Figure 2 is an enlarged structure view at A in; Figure 6 For the present invention Figure 4 is an enlarged structure view at B in; Figure 7 For the present invention Figure 4 is an enlarged structure view at C in.
[0016] Figure 8 is a schematic top view structure view of the airbag ring of the present invention.
[0017] In the figure: 1, base; 2, driving mechanism; 3, rotating shaft; 4, sealing seat; 5, thruster; 6, sealing ring; 7, airbag ring; 8, threaded rod; 9, fixed seat; 10, inflation frame; 11, push-pull mechanism; 111, gear roller; 112, gear ring; 113, push head; 114, mounting rod; 115, elastic telescopic rod; 12, first oil cavity; 13, second oil cavity; 14, first piston rod; 15, second piston rod; 16, pressure sensor; 17, contact block; 18, automatic inflation mechanism; composed of 181, fixing plate; 182, push rod; 183, first spring; 184, movable rod; 185, second spring; 186, limiting rod; 187, limiting groove; 188, movable groove; 189, movable block. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0019] Please refer to Figures 1-8 , the present invention provides a technical solution: a sealing system for a lifting thruster, including a base 1, a driving mechanism 2, a rotating shaft 3, a sealing seat 4, a thruster 5, a sealing ring 6, an airbag ring 7, a threaded rod 8, a fixed seat 9, an inflatable frame 10, a push-pull mechanism 11, a toothed roller 111, a toothed ring 112, a push head 113, a mounting rod 114, an elastic telescopic rod 115, a first hydraulic oil chamber 12, a second hydraulic oil chamber 13, a first piston rod 14, a second piston rod 15, a pressure sensor 16, a contact block 17, an automatic inflation mechanism 18, a fixing plate 181, a pushing rod 182, a first spring 183, a movable rod 184, a second spring 185, a limiting rod 186, a limiting groove 187, a movable groove 188 and a movable block 189.
[0020] Embodiment 1: Please refer to Figures 1-5 and Figure 7 , a driving mechanism 2 is arranged in the base 1, and the bottom of the driving mechanism 2 is connected with a sealing seat 4 through a rotating shaft 3. The sealing seat 4 rotates in a fitting manner in the bottom cavity of the base 1, and a thruster 5 is fixed at the bottom of the sealing seat 4; a sealing ring 6 is sleeved in the outer cavity of the sealing seat 4, and an airbag ring 7 is fitted inside the sealing ring 6, and the airbag ring 7 is embedded and limitedly installed in the sealing seat 4. An inflatable frame 10 is circumferentially arranged in the sealing seat 4, and the outer end inflation port of the inflatable frame 10 is sleeved at the inner side one-way inflation port of the airbag ring 7. A push-pull mechanism 11 is arranged between the inflatable frame 10 and the fixed seat 9, and the push-pull mechanism 11 is used to adjust the lateral position of the inflatable frame 10. A first hydraulic oil chamber 12 and a second hydraulic oil chamber 13 are respectively opened in the middle and inside of the fixed seat 9, and the outer side of the bottom of the first hydraulic oil chamber 12 is connected with the inner end of the second hydraulic oil chamber 13. A second piston rod 15 is installed at the top of the first hydraulic oil chamber 12, and a first piston rod 14 is slidably fitted inside the second hydraulic oil chamber 13, and the outer end of the first piston rod 14 is slidably fitted inside the inflatable frame 10; the sealing rings 6 are vertically and equidistantly sleeved and distributed on the outer side of the sealing seat 4, and except for the lowermost sealing ring 6, the other top sealing rings 6 do not contact the inner wall of the bottom cavity of the base 1; an automatic inflation mechanism 18, the automatic inflation mechanism 18 is arranged between the sealing seat 4 and the base 1, and the automatic inflation mechanism 18 is used to inflate the airbag ring 7 following the rotation of the sealing seat 4; The automatic inflation mechanism 18 includes a fixed plate 181 which is fixed on the top of the contact block 17. A push rod 182 is fixed on the outer side of the fixed plate 181. The top of the push rod 182 is sleeved with a movable rod 184 through a first spring 183. An inner wall of a cavity at the bottom of the movable rod 184 is embedded with a limiting rod 186 through a second spring 185. One end of the limiting rod 186 is located in a limiting groove 187 which is opened on the outer side of the push rod 182. The limiting rod 186 is movably arranged in a movable groove 188 which is opened in the base 1. A movable block 189 is fixed on an inner wall of the movable groove 188. The movable rod 184 elastically slides vertically on the push rod 182 through the first spring 183, and a sliding distance of the movable rod 184 corresponds to a distance between adjacent limiting grooves 187. An inner end of the limiting rod 186 is designed as a right trapezoidal structure, and the inner end of the limiting rod 186 is in concave-convex fit with the limiting groove 187. The limiting grooves 187 are vertically and equally spaced on the push rod 182, and an inclined surface of the inner end of the limiting rod 186 faces upward. Multiple groups of movable blocks 189 are vertically and equally spaced in the movable groove 188, and a vertical distribution rule of the movable blocks 189 corresponds to that of the sealing ring 6. Each group of movable blocks 189 is equally angularly distributed in the movable groove 188. A bottom of the movable block 189 is designed as an arc structure, and a position of the bottom of the movable block 189 corresponds to a top of the movable rod 184 When the driving mechanism 2 drives the sealing seat 4 to rotate through the rotating shaft 3, the sealing ring 6 will be worn. During this process, the automatic inflation mechanism 18 can cooperate with the movement of the first piston rod 14 to fill the gas in the inflation frame 10 into the airbag ring 7, so as to perform real-time expansion support on the sealing ring 6 and make up for the wear Embodiment 2: On the basis of Embodiment 1, please refer to Figures 1-4 、 Figure 6 and Figure 8, a pressure sensor 16 is fixed at the top convex position of the fixed seat 9, and the pressure sensor 16 is located on the moving track of the contact block 17. The contact block 17 is fixed to the outer side of the top of the second piston rod 15. A threaded rod 8 is vertically installed in the inner cavity of the sealing seat 4, and a fixed seat 9 is sleeved on the threaded rod 8 in a threaded manner. The threaded rod 8 is driven by a motor. The pushing and pulling mechanism 11 includes a toothed roller 111. The toothed roller 111 is embedded in the fixed seat 9, and a toothed ring 112 is engaged with the inner side of the toothed roller 111. The toothed roller 111 is driven by a motor. A push head 113 is fixed to the bottom of the outer side of the toothed ring 112. An installation rod 114 is arranged on the moving track of the push head 113. The installation rod 114 is horizontally and slidably arranged in the fixed seat 9 through an elastic telescopic rod 115 in a penetrating manner, and the outer end of the installation rod 114 is fixed to the inflatable frame 10; the push head 113 is designed as an arc-shaped structure and is distributed at equal angles on the outer side of the toothed ring 112, and the number of distributed push heads 113 corresponds to the number of distributed inflatable frames 10; the sealing rings 6 are vertically and equally spaced on the outer side of the sealing seat 4, and except for the lowermost sealing ring 6, the other top sealing rings 6 do not contact the inner wall of the bottom cavity of the base 1; the contact blocks 17 are vertically and equally spaced on the second piston rod 15, and the number of distributed contact blocks 17 corresponds to the sealing rings 6, and the distance between adjacent contact blocks 17 corresponds to the distance between adjacent sealing rings 6; By sensing the contact block 17 through the pressure sensor 16, cooperating with the pushing and pulling mechanism 11 to adjust the horizontal position of the inflatable frame 10, and then adjusting the height of the fixed seat 9 to switch the position of the inflatable frame 10, so that the inflatable frame 10 expands and supports the top sealing ring 6, realizing the switching use of the sealing ring 6.
[0021] Working principle: When using the sealing system for the lifting thruster, as Figures 1-8Among them, first, the driving mechanism 2 drives the sealing seat 4 to rotate through the rotating shaft 3, driving the thruster 5 to rotate and adjust the angle. During this process, the sealing ring 6 contacts the inner wall of the bottom cavity of the base 1 and wears. When the sealing seat 4 rotates, it drives the movable rod 184 to rotate in the movable groove 188. When the movable rod 184 contacts the movable block 189, the movable block 189 pushes the movable rod 184 downward, first compressing the first spring 183, and then pushing the push rod 182 downward. The second piston rod 15 can be driven to move downward through the fixing plate 181, and then the first piston rod 14 is driven to move outward through the gear ring 112 and the second hydraulic chamber 13. The first piston rod 14 moves in the air inflation frame 10, pushing the air in the air inflation frame 10 into the airbag ring 7, causing it to expand, pushing the sealing ring 6 to expand outward, and replenishing the wear. When the movable rod 184 separates from the movable block 189, under the action of the first spring 183, the movable rod 184 moves upward and resets. At the same time, the inclined surface of the limiting rod 186 is stressed and contracts, and cooperates with the second spring 185 to reset and snap into the next limiting groove 187, facilitating the movable rod 184 to drive the push rod 182 to move downward, but when the movable rod 184 resets, it will not drive the push rod 182 to move upward and reset. Thus, the push rod 182 can move downward unidirectionally to continuously expand the sealing ring 6; As the movable rod 184 continues to move downward, when the first pressure sensor 16 on the second piston rod 15 contacts the contact block 17, it means that the expansion position of the lowermost sealing ring 6 is approaching the limit. At this time, the background controller controls the motor to drive the gear roller 111 to rotate, and the thruster 5 is reset. The gear roller 111 drives the gear ring 112 to rotate, causing the push head 113 to separate from the mounting rod 114. Under the action of the elastic telescopic rod 115, the mounting rod 114 drives the air inflation frame 10 to reset, causing the air inflation frame 10 to disengage from the one-way air inlet of the lowermost airbag ring 7. Then, the motor drives the threaded rod 8 to rotate, driving the fixed seat 9 to move upward in the base 1 to the position of the second sealing ring 6. Again, the gear roller 111 drives the gear ring 112 to rotate, causing the air inlet end of the air inflation frame 10 to be sleeved on the one-way air inlet of the airbag ring 7 at this position, facilitating the airbag ring 7 at this position to expand the new sealing ring 6 again when the sealing seat 4 rotates subsequently. During this process, the bottom sealing ring 6 does not lose its sealing effect, so the new sealing ring 6 has enough time to be expanded to the sealing position, realizing the automatic switching of the sealing ring 6.
[0022] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A sealing system for a lifting thruster, comprising a base (1). A driving mechanism (2) is arranged inside the base (1), and the bottom of the driving mechanism (2) is connected to a sealing seat (4) through a rotating shaft (3). The sealing seat (4) rotates in a fitting manner in the bottom cavity of the base (1), and a thruster (5) is fixed to the bottom of the sealing seat (4). It is characterized in that: It further includes a sealing ring (6). The sealing ring (6) is sleeved in the outer cavity of the sealing seat (4), and an airbag ring (7) is fittingly arranged inside the sealing ring (6). The airbag ring (7) is embedded and limitedly installed in the sealing seat (4). A threaded rod (8) is vertically installed at the internal cavity of the sealing seat (4), and a fixing seat (9) is threadedly sleeved on the threaded rod (8). The threaded rod (8) is driven by a motor. An air inflation frame (10) is circumferentially arranged inside the sealing seat (4), and the outer end air inflation port of the air inflation frame (10) is sleeved at the inner one-way air inflation port of the airbag ring (7). A push-pull mechanism (11) is arranged between the air inflation frame (10) and the fixing seat (9), and the push-pull mechanism (11) is used to adjust the lateral position of the air inflation frame (10). The middle and inner parts of the fixing seat (9) are respectively provided with a first hydraulic chamber (12) and a second hydraulic chamber (13). The outer bottom of the first hydraulic chamber (12) is connected to the inner end of the second hydraulic chamber (13), and a second piston rod (15) is installed at the top of the first hydraulic chamber (12). A first piston rod (14) is fittingly and slidably arranged inside the second hydraulic chamber (13), and the outer end of the first piston rod (14) is fittingly and slidably arranged inside the air inflation frame (10). A pressure sensor (16) is fixed at the protruding position at the top of the fixing seat (9), and the pressure sensor (16) is located on the movement track of a contact block (17). The contact block (17) is fixed to the outer side of the top of the second piston rod (15). An automatic air inflation mechanism (18) is arranged between the sealing seat (4) and the base (1), and the automatic air inflation mechanism (18) is used to inflate the airbag ring (7) following the rotation of the sealing seat (4). Among them, the push-pull mechanism (11) includes a toothed roller (111). The toothed roller (111) is embedded and installed inside the fixing seat (9), and a toothed ring (112) is meshed with the inner side of the toothed roller (111). The toothed roller (111) is driven by a motor. A push head (113) is fixed to the bottom of the outer side of the toothed ring (112), and a mounting rod (114) is arranged on the movement track of the push head (113). The mounting rod (114) is horizontally and slidably arranged inside the fixing seat (9) through an elastic telescopic rod (115), and the outer end of the mounting rod (114) is fixed to the air inflation frame (10). Secondly, the automatic inflation mechanism (18) includes a fixed plate (181). The fixed plate (181) is fixed to the top of the contact block (17), and a push rod (182) is fixed to the outside of the fixed plate (181). The top of the push rod (182) is sleeved with a movable rod (184) through a first spring (183). A limiting rod (186) is embedded and installed at the inner wall of the bottom cavity of the movable rod (184) through a second spring (185). One end of the limiting rod (186) is located in a limiting groove (187), and the limiting groove (187) is opened on the outside of the push rod (182). The limiting rod (186) is movably arranged in a movable groove (188), and the movable groove (188) is opened inside the base (1). A movable block (189) is fixed to the inner wall of the movable groove (188).
2. The sealing system for a lifting thruster according to claim 1, characterized in that: The sealing rings (6) are vertically and equidistantly sleeved and distributed on the outside of the sealing seat (4). Except for the lowermost sealing ring (6), the other top sealing rings (6) do not contact the inner wall of the bottom cavity of the base (1).
3. The sealing system for a lifting thruster according to claim 1, characterized in that: The push heads (113) are designed as arc-shaped structures and are equiangularly distributed on the outside of the toothed ring (112). The number of distributed push heads (113) corresponds to the number of distributed inflation frames (10).
4. A sealing system for a lift thruster according to claim 1, characterized in that: The contact blocks (17) are vertically and equidistantly distributed on the second piston rod (15). The number of distributed contact blocks (17) corresponds to the number of sealing rings (6). The distance between two adjacent contact blocks (17) corresponds to the distance between two adjacent sealing rings (6).
5. A sealing system for a lift thruster according to claim 1, characterized in that: The movable rod (184) vertically and elastically slides on the push rod (182) through the first spring (183). The sliding distance of the movable rod (184) corresponds to the distance between two adjacent limiting grooves (187).
6. A sealing system for a lifting thruster according to claim 1, characterized in that: The inner end of the limiting rod (186) is designed as a right trapezoidal structure. The inner end of the limiting rod (186) is in concave-convex fit with the limiting groove (187). The limiting grooves (187) are vertically and equidistantly distributed on the push rod (182). The inclined surface of the inner end of the limiting rod (186) is upwardly arranged.
7. A sealing system for a lifting thruster according to claim 1, characterized in that: Multiple groups of movable blocks (189) are vertically and equidistantly distributed in the movable groove (188). The vertical distribution rule of the movable blocks (189) corresponds to the number of sealing rings (6). Each group of movable blocks (189) is equiangularly distributed in the movable groove (188). The bottom of the movable block (189) is designed as an arc-shaped structure, and the bottom of the movable block (189) corresponds to the top position of the movable rod (184).