66 results about "Pump-jet" patented technology

The invention provides an automatic berthing method and device for a single boat in the new quality field, and relates to the technical field of automatic control of boats in the new quality field. Static berth information and a sensor sensing result are fused to construct a task situation package containing a multi-moving-obstacle trajectory prediction set and a dynamic prohibited area set, dynamic collision avoidance guidance is executed in a first-stage tracking path, and a staged deceleration strategy of vector motion and hovering is switched to obtain a berthing point state set when conflicts occur. Performing in-situ heading adjustment by using the state set of the berthing point, outputting consistent heading, zero navigational speed and position states, executing target point type vector approach guidance in the second stage, hovering when a collision risk is predicted, and recovering vector motion control in a safe time window to complete lateral positioning welt berthing. And finally, precise thruster control instruction output is achieved through thrust distribution of the double water-jet thrusters. According to the invention, automatic berthing of the new-quality field single boat under the condition of multiple moving obstacles can be realized.

The invention relates to an array type underwater propeller with high maneuverability and low energy consumption, a pump jet generating device and a flow divider jointly form a propeller front end, an intelligent fluid director forms a propeller rear end, and the pump jet generating device drives an impeller through a rotating motor to drive surrounding water flow to rotate to generate a main jet flow; an isolation structure is arranged in the flow divider and used for evenly dividing the main jet flow into multiple strands of independent sub jet flows, and all the sub jet flows form propelling power after entering the intelligent flow guider to be guided. The intelligent fluid directors are connected with the flow channels of the flow divider in a one-to-one correspondence mode and used for converting fluid flowing out of the flow divider and out of the jet flow face into effective action jet flow with the adjustable flow speed. The intelligent fluid director comprises a jet flow end regulation and control mechanism and a pressure relief end regulation and control mechanism, and the jet flow end regulation and control mechanism is used for independently regulating the flow speed of effective jet flow ejected from the fluid director; and the pressure relief end regulation and control mechanism is used for maintaining the constant flow velocity at the inlet of the fluid director by releasing part of water flow when the effective jet flow velocity is regulated.

The invention discloses an unmanned ship self-adaptive safety redundancy system for an inland river ultra-shallow water environment and a control method. The system is composed of four-stage closed-loop redundancy of sensing, decision making, execution and laws and regulations. A 0.1 m-stage shallow water three-dimensional map is constructed in real time by a dual-millimeter-wave radar and a high-frequency single-beam sounding sonar; the main and standby controllers process the quay wall effect, backflow and grounding nonlinear disturbance on line through a BLF-RBFNN fixed time convergence algorithm, and the upper bound of convergence time is 4.2 s and is irrelevant to the initial state; the variable-configuration double-pump jet-air cushion hybrid propulsion device adjusts the draft on line according to the water depth of 0.12-0.45 m, and is matched with the self-righting honeycomb composite ship body to automatically stop leakage and return within 60 seconds when the ship body is damaged; and when the ship-end double control fails, the ship-shore cloud collaborative digital twinborn body completes regulation-level minimum risk takeover within 10 seconds. Experiments prove that the path error is less than or equal to 0.08 m and the fault degradation success rate is 100% in a 0.15 m water tank and 0.35 m Yangtze River channel, and zero-grounding, zero-overturning and zero-regulation illegal sailing of the ultra-shallow water unmanned ship is realized.

The invention discloses an autonomous berthing method for a double-water-jet-propeller water surface unmanned ship, and the method comprises the steps: defining a state space, an action space, a reward function and a neural network structure element, employing a reinforcement learning method, and according to the current radar observation information of the unmanned ship, the target berth position information, and the current speed information of the unmanned ship; according to the method, the unmanned ship control output information is obtained, the problems that a traditional manual design berthing collision avoidance rule, a physical motion model, a machine learning method, an environment model and the like are greatly influenced by the environment, and intermediate steps are multiple and complex are solved, the calculation efficiency and the one-time planning berthing success rate are effectively improved, and therefore the berthing efficiency is overall improved.

The invention discloses a water jet propulsion boat low-speed working condition energy-saving device based on the coanda effect. The water jet propulsion boat low-speed working condition energy-saving device comprises a flow guide plate, a fixed connecting piece and an angle adjusting device. The guide plate is arranged behind a nozzle of the water-jet propeller and is an S-shaped curved surface, the front end is hinged with the fixed connecting piece, and the rear end is hinged with the angle adjusting device; under a low-speed working condition, the guide plate rotates to a folded state, the upper wall surface covers a nozzle of the water-jet propeller and can guide jet flow to flow in a manner of being attached to the guide plate by means of the coanda effect, and the lower wall surface guides circulating vortex in a boat rear wake flow field; under the medium-high speed working condition, the guide plate rotates to a put-down state, the upper wall face is far away from jet flow of the water-jet propeller, and the lower wall face does not generate additional flow field disturbance in the boat body wake flow field. The jet flow of the water-jet propeller and the circulating vortex of the wake flow field of the boat body are guided based on the coanda effect, adverse flow coupling between the jet flow of the water-jet propeller and the circulating vortex is restrained, recycling of effective momentum in the corresponding wake flow field vortex is synchronously improved, and therefore the propelling efficiency of the water-jet propelling boat under the low-speed working condition is improved.

The refrigeration device comprises a heat exchanger and a water-jet propeller, the heat exchanger is provided with a water flow channel, and the water flow channel of the heat exchanger is communicated with a water flow pipeline of the water-jet propeller, so that water flow sucked by the water-jet propeller exchanges heat with the heat exchanger and then is sprayed out from a water outlet. The heat exchanger of the refrigerating device communicates with the water flow pipeline of the water-jet propeller, water flow formed in the sailing process of the water-jet propeller is used for cooling the condenser, integrated design of a propelling system and a refrigerating and cooling system is achieved, and the problems that a traditional independent condenser is large in size and heavy in weight are solved; and the structural complexity and the occupied space of the refrigerating system are obviously reduced.

The present application relates to the technical field of water jet propeller, and discloses a fish environmental protection type water jet propeller based on bionics, which comprises a water inlet pipeline, a water jet assembly is arranged on the water inlet pipeline, and the water jet assembly comprises a main shaft. In order to meet the dual requirements of ship propulsion and water ecological protection, the fish environmental protection type water jet propeller based on bionics is provided with the water jet assembly, the assembly drives the mounting shaft to rotate together with the main shaft, the spherical block and the conical block cooperatively drive the impeller and the propeller to run at high speed, and stable propelling water flow is formed; the straight groove, the connecting groove, the hollow drainage groove and the conical drainage groove of the drainage module constitute a closed loop flow channel, the high-energy water flow downstream of the nozzle is guided back to the inlet edge of the impeller and the propeller through the straight metal pipe and the drainage curved metal pipe, uniform backflow jet flow is formed on the surface of the blade, the bionic vortex screen is generated by the interference of the main flow, the rigid edge of the blade is covered, and small fish are guided to actively avoid.

The invention provides a water-jet propeller impeller structure with self-adaptive guide vanes, and relates to the technical field of water-jet propellers. The water-jet propeller impeller structure with the self-adaptive guide vanes comprises a main body mounting plate body, the upper surface of the main body mounting plate body is fixedly connected with a propeller main pipeline, and the bottom end of the propeller main pipeline is communicated with the surface of the main body mounting plate body; and the surface of the propeller main pipeline is rotatably connected with a horizontally arranged rotary mounting shaft in a penetrating manner. A driving air cylinder is started, the piston end of the driving air cylinder drives a driving connecting rod to move, the driving connecting rod drives a mounting fixing plate to move, the mounting fixing plate drives an annular driving block to move, a driving clamping block drives a second bevel gear to rotate through a second rotating shaft rod, and the second bevel gear drives four first bevel gears to rotate; the first bevel gear drives the guide vane to rotate through the first rotating shaft rod, the opening and closing angle of the guide vane is changed, different requirements are met, and operability is high.

The utility model discloses an independently detachable thrust bearing structure of a water-jet propeller, which comprises a shaft sleeve sleeved on the outer side of an impeller shaft, a locking nut, a thrust bearing, an oil distributing ring and a radial support bearing are sequentially sleeved outside the shaft sleeve along the direction from the end part of the impeller shaft to the root part of the impeller shaft, and a bearing box is arranged outside the thrust bearing and the radial support bearing. The bearing box is connected with the guide vane body; and a bearing cover is arranged between the bearing box and the impeller shaft. The water-jet propeller can be independently replaced without being detached from a ship, and the maintenance cost is low. And meanwhile, the oil path in the bearing cavity is prolonged through the oil distribution ring, the distance between the oil inlet hole and the oil outlet hole is increased, oil is fully circulated in the bearing cavity, and the cooling effect is good.

The invention relates to the technical field of life-saving equipment, in particular to a self-rescue system based on a power life jacket and an intelligent self-rescue method.The self-rescue system comprises a life jacket body, a main control module, a power module and a battery module, and the power module comprises a propeller body and two pump spraying propelling units; the two pump spraying propelling units are arranged on the two sides of the propeller body respectively, the main control module and the battery module are both arranged on the propeller body, and the life jacket body is provided with a plurality of attitude sensors. According to the system, whether abnormal or dangerous postures such as face downward, rolling and handstand occur or not is accurately judged, when the abnormal postures are detected, the system automatically adjusts the thrust magnitude and direction of the two pump spraying propulsion units, posture correction torque is generated, a wearer is helped to recover to a safe posture, and the safety of the wearer is improved. The system can make a quick response when rescue workers are collided, unbalanced or exhausted, and it is guaranteed that the rescue workers are always in a breathable safe posture.

The invention relates to the technical field of water jet propulsion and fluid control, and provides a water jet propeller nozzle control device which comprises a water jet propeller, a rotary closer, a driving device, a control device and a flow velocity sensor. The rotary closer is fixed to the outlet end of a nozzle of the water-jet propeller, and the flow velocity sensor is embedded in the rotary closer to monitor the flow velocity of the nozzle in real time. The outer ring of the rotary closer is tightly connected with the driven wheel, and blades in the rotary closer are driven to do radial opening and closing motion through gear meshing transmission. The man-machine interaction terminal is used for inputting a target nozzle flow rate or an emergency stop signal, the central controller controls the frequency converter to work according to an input instruction and feedback of the sensor, and accurate flow rate adjustment and safe emergency stop are achieved. The control performance, the safety and the reliability of the water jet propulsion system are comprehensively improved. Response is rapid, the flow field is efficient, and resistance and loss are small; the device has an active sudden stop capability, and realizes absolutely reliable rapid cut-off safety guarantee.

A water jet propeller for water sailing comprises a jet pump shell, a motor cavity, a transmission cavity and a water inlet cavity are formed in the jet pump shell, a spray head is installed at the left end of the water inlet cavity, a driving motor is installed in the motor cavity, a transmission assembly is arranged in the transmission cavity, and a driving shaft is installed in the water inlet cavity. An output shaft of the driving motor is in transmission connection with a driving shaft through a transmission assembly, the driving shaft is connected with an impeller center shaft through a coupler, and an impeller is fixedly installed at the other end of the impeller center shaft. A water inlet grid is fixedly embedded in the bottom of the spray pump shell, a supporting plate is fixedly installed above the spray pump shell, a U-shaped hanging plate is fixedly installed on the supporting plate, a control box is fixedly installed on the left side face of the supporting plate, the left side of the supporting plate is fixedly covered with an outer shell, and the lower end of the outer shell is in sealed connection with the spray pump shell. And the control box is connected with a control port of the driving motor through a cable. According to the utility model, the defects in the prior art are overcome, and efficient water sailing can be realized.

The application discloses a micro baffle structure for reducing vibration and increasing efficiency of a water jet propeller pump, wherein a hub surface of a guide vane body of the water jet propeller pump is a semi-sphere, the guide vane body is provided with guide vane body blades, a side of the guide vane body blades close to the semi-sphere plane is a root of the guide vane body blades, a bone surface of the guide vane body blades is a reference surface S, a front side of the guide vane body blades is a pressure surface C, a back surface of the guide vane body blades is a suction surface A, a back surface of the micro baffle structure is a suction surface B, one side of the micro baffle structure is connected with the suction surface A of the guide vane body blades, and the other side of the micro baffle structure is bent and extends to an outer edge of the guide vane body blades. The application limits the development of a rotor root wake in a guide vane body channel, suppresses the intensity of guide vane body transverse vortex flow caused by a transverse pressure gradient, has a simple structure, and can improve the efficiency of the water jet propeller and reduce the dynamic flow excitation force of the water jet propeller.

The present application belongs to the technical field of large bridge excitation, and discloses a large-span bridge low-frequency large-amplitude vibration excitation device. The present application generates periodic vertical force by controlling the water pump jet direction and jet timing, provides controllable vertical load for the bridge, and thus excites the bridge to produce large-amplitude vertical or torsional vibration. By designing the water tank capacity, the number of water pumps, the nozzle diameter and the jet speed, using the multi-nozzle parallel and phase control strategy, the jet force and the water flow back force are optimized, the system power, the installation difficulty and the cost are significantly reduced, and high-efficiency excitation is realized. Compared with the prior art, the large-span bridge low-frequency large-amplitude vibration excitation device of the present application does not need complex mechanical frequency modulation and actuator, has small size, is convenient to disassemble and assemble, and has a flexible and adjustable control system, can quickly adapt to different vibration modes and frequency working conditions of the bridge, and has significant engineering application prospect and popularization value.

The invention provides a device for inhibiting cavitation of a pump-jet propeller and reducing noise, and belongs to the technical field of underwater vehicle propelling, energy conservation and noise reduction, the device comprises a guide pipe, a rotor, a propeller hub and a porous stator, the rotor and the porous stator are mounted on the propeller hub, the guide pipe is supported by the porous stator, the porous stator is of a porous structure, and the rotor is connected with the porous stator. The porous structure is used for improving the flow field of the rotor and improving the performance of the rotor and is located at the rear edge of the stator. The rear edge of the stator is provided with the porous structure, the porous structure is a plurality of small holes with different sizes, the porous structure restrains the trailing vortex of the stator in a micropore seepage mode, the inflow pressure of the rotor is greatly increased, the low-pressure area of the suction surface of the rotor is reduced, therefore, cavitation of the surface of the rotor is restrained, and the service life of the rotor is prolonged. The multi-hole structure scatters the trailing vortex, and the pulsating pressure amplitude of a rotor area is obviously weakened, so that the generation of broadband noise is effectively inhibited, and the radiation noise level of the pump-jet propeller is reduced.

Jet engine thermal transport bus pumps are disclosed. Disclosed herein is an aircraft comprising a gas turbine engine configured to burn fuel at a fuel flow rate to generate an engine power (Pengine), the fuel characterized by a first specific heat capacity (cp_fuel) and a net heat of combustion (NHCfuel); and a thermal management system configured to transfer heat from a working fluid to a heat sink fluid, the working fluid characterized by a second specific heat capacity (cp_pump) and a first density (ρpump), the thermal management system including a pump configured to generate a pump power (Ppump) to pressurize the working fluid, and whereinPOW=Ppump(cp⁢_⁢pumpcp⁢_⁢water)⁢(ρwaterρpump)2,FFR=(PengineN⁢H⁢Cfuel)⁢(cp⁢_⁢fuelcp⁢_⁢pump),0.008≤POW / FFR5 / 3≤12, FFR is between 0.05 pounds-mass per second and 16 pounds-mass per second, and ρwater and cp_water is the density and specific heat capacity of water, respectively.

1. Name of the product in this design: Waterjet Propulsion Unit. 2. Purpose of this design: A waterjet propulsion system for underwater navigation, providing propulsion power. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention provides a shaftless pump-jet propeller and a using method thereof, and belongs to the field of shaftless pump-jet, and the shaftless pump-jet propeller comprises a stator, a rotor and an annular paddle; the stator and the rotor are both in a cylinder shape with two through ends, and the rotor is sleeved with the stator and axially rotates relative to the stator. The annular blades are axially distributed on the inner wall of the rotor around the rotor, the annular blades synchronously rotate along with the rotor, the annular blades and the inner wall of the rotor are connected with front root parts and rear root parts, the front root parts swing along the outer contour of the radial section of the rotor relative to the rear root parts, and the shapes of the annular blades are adjusted. Real-time adjustment of the blade form is achieved through relative swinging of the front root part and the rear root part, the blades can keep the optimal attack angle and the optimal water flow contact face under different navigational speed working conditions, and therefore the propelling efficiency is improved, and energy consumption is reduced.

The multifunctional unmanned rescue boat comprises a boat body, an equipment platform is arranged on the boat body, a first equipment area, a second equipment area, a third equipment area and a fourth equipment area are sequentially arranged on the equipment platform in the length direction of the equipment platform, carrying equipment is placed in the first equipment area, and a life buoy and an unmanned aerial vehicle are placed in the second equipment area. A monitoring device is placed in the third equipment area, and a driving device is placed in the fourth equipment area; the equipment platform is further provided with a plurality of mechanical arms, and the mechanical arms are arranged on the boat head and the two sides of the boat body. The rescue boat is complete in equipment and can be remotely controlled through the unmanned aerial vehicle and the unmanned underwater vehicle of the equipment platform, and water and underwater targets can be conveniently searched; the three-side carrying capacity of the boat is improved through the three mechanical arms, and the conveying and rescue efficiency of the boat is improved; the tail water-jet propeller has good dynamic property, speed reduction is achieved by adjusting the direction of a nozzle, and when the boat is decelerated and drives to a person falling into water, the risk that the person is twisted is reduced.

The invention discloses an underwater vector type shaftless pump jet propeller, and belongs to the technical field of underwater propellers. The propeller comprises a propeller body, a flow dividing device, a vector control device and a control unit. A plurality of main spraying pipes distributed in the circumferential direction are arranged in the propeller body, and the flow dividing devices are arranged corresponding to the main spraying pipes and used for guiding part of water flow to be sprayed out in the non-axial direction through curve type flow dividing pipelines to generate lateral thrust. The vector control device drives a flow control component arranged at an inlet of the flow dividing pipeline through linear motion so as to control on-off of water flow. The control unit cooperatively controls the vector control devices according to the target steering instruction and the real-time navigational speed, the corresponding flow control components are accurately adjusted, vector synthesis is conducted on lateral thrust in the space, and therefore the steering torque in the target direction is generated. According to the invention, shunting regulation and control are carried out at a thrust generation source, the response speed is high, the efficiency is high, the structure is compact, and the maneuverability and maneuverability of the underwater vehicle are obviously improved.

The utility model belongs to life-saving equipment technical field, specifically disclose a kind of modularization pump spray propeller and lifesaving equipment.The utility model's modularization pump spray propeller, impeller of propeller operates in the uniform flow field in fairing, can effectively utilize inflow ram, so that it can better improve anti-cavitation performance at high speed, reach higher propelling efficiency, and not susceptible to water flow condition and sailing speed influence;The motor speed of propeller is changed by electronic speed regulator, to change the water velocity of fairing water outlet jet, and then the propelling force of propeller can be quickly changed;The motor speed of lifesaving equipment two sides propeller is changed by electronic speed regulator, to change the water velocity of two sides fairing water outlet jet and produce speed difference, that is, the quick steering of lifesaving equipment can be realized;Even if lifesaving equipment overturns, because the upper end and lower end of lifesaving equipment stern are all provided with propeller, the normal propelling use of lifesaving equipment is not affected.

This invention belongs to the field of propulsion control technology, specifically relating to an amphibious vehicle and a hybrid propulsion method and system. It employs a composite propulsion configuration consisting of a main water jet propulsion unit and dual-sided electric propulsion units on both sides of the vehicle body. A drive unit provides power to the water jet propulsion unit, while a power battery provides operating power to the electric propulsion units. The water jet propulsion unit is only equipped with steering nozzles, eliminating the need for mechanical reversing devices such as a mechanical backboard. This decouples forward and reverse functions, with the reversing function entirely handled by the dual-sided electric propulsion units, each capable of independently generating forward or backward thrust. This short-duration, high-thrust electric propulsion method replaces the original mechanical reversing technology, resulting in high propulsion efficiency and a small size. It solves the key defects of traditional mechanical reversing structures, such as large space occupation and low efficiency, effectively preventing water flow from impacting the vehicle body during reversing and also increasing auxiliary propulsion capabilities.

The invention discloses a nozzle adjusting device for a water-jet propeller, the nozzle adjusting device is integrally mounted on the periphery of a basic nozzle of the water-jet propeller, and the nozzle adjusting device comprises a sliding sheet, a straight rod and a telescopic driving mechanism; the multiple sliding pieces are arranged in the circumferential direction of the small end of the basic nozzle, a straight rod is installed on the outer wall of each sliding piece, one end of each straight rod is fixedly connected with the corresponding sliding piece, the other end of each straight rod extends towards the large end of the basic nozzle and is connected with the output end of the telescopic driving mechanism, and the telescopic driving mechanism is installed at the large end of the basic nozzle. The telescopic driving mechanism drives the straight rod to move along the wall face of the basic nozzle, and then the sliding piece is driven to slide along the wall face of the basic nozzle, so that synchronous adjustment of the size and the length of the nozzle is achieved. According to the invention, double adjustment of extension and convergence can be realized, the area is changed, the nozzle length is increased, and the conversion efficiency is improved; and zero obstruction of flow in the nozzle can be realized, namely, all structures are arranged on the outer side of the nozzle, so that the flow resistance in the nozzle is prevented from being increased.

This invention relates to a design method for the assembly layout of a stern section and a waterjet propulsion system for a surface vessel. The method comprises: S1, studying the characteristics of the stern section of the surface vessel and considering the assembly layout with the waterjet propulsion system, making adaptive improvements to the stern section's lifting point and cross-sectional characteristics; S2, designing a guide channel in front of the duct, with design factors including the starting position, width, and depth of the guide channel; S3, combining the propulsion system's embedded connection form and shafting layout, comprehensively considering the effects of resistance and wake field, selecting the optimal appendage scheme for the stern layout. This invention comprehensively considers propulsion strength, vibration, and flow field aspects, forming a stern structure where the duct and stern are integrated. A guide channel area is adaptively designed in front of the propulsion duct's flow field. For the shafting layout of the embedded waterjet propulsion system, a stern shaft frame scheme selection and design are carried out, resulting in a stern modification scheme, assembly scheme, and appendage scheme for the main hull with lower resistance and more uniform wake.

The invention relates to a bow thruster for recreational boats, consisting of a support structure which, for support in the bow area of ​​the keel, is equipped with support elements at suitable intervals above and below a commonly present towing eye (also called a U-bolt), and which carries a jet drive in the underwater area, which acts transversely to the longitudinal axis of the boat. This bow thruster is attached to the towing eye of the boat by means of a central mounting when required and is sufficiently braced against the bow of the boat by means of the support elements to absorb the transverse forces of the jet drive. The electrical supply for this bow thruster is provided either exclusively via the boat's electrical network and / or via an additional power supply, e.g., a separate accumulator, a so-called battery pack. The control or activation of this bow thruster by a suitable control element is done via a hard-wired control line and / or wirelessly via radio or a digital short-range transmission.

The invention relates to the technical field of ship propulsion control, in particular to a self-circulation jet flow stability expansion control system for a water-jet propeller, which comprises a self-circulation jet flow regulation and control unit, a flow state monitoring module, a vector jet flow generation module, an intelligent control module and a self-sustaining energy module, the flow state monitoring module obtains pressure distribution data of the back slope surface of the elbow-shaped water inlet flow channel through a pressure sensor, the intelligent control module extracts flow separation dominant frequency characteristics and dynamically generates jet pulse frequency, momentum coefficient and vector angle compensation amount, and the vector jet generation module executes instructions through an independent adjusting mechanism. The self-sustaining energy module uses pipeline differential pressure to generate electricity and supply power. The system solves the problems of turbulence and energy waste of a traditional fixed parameter control flow field, accurately inhibits vortexes, improves the stability of the flow field and the energy utilization rate, and guarantees the propulsive efficiency and the service life of equipment.

The present application relates to a kind of modularization submerged water jet propulsion self-propelled ship model, including ship body, submerged water jet propeller, propeller fixed base, ship body support frame and ship body channel supplement module;Ship body tail portion preset propeller installation groove;Propeller fixed base lower end is closely attached with submerged water jet propeller guide pipe and is welded, its upper end is from propeller installation groove upper end and is fixedly connected with ship body support frame, for carrying out self-propelled test;The upper end of ship body channel supplement module lower end surface is from propeller installation groove upper end and is fixedly connected with ship body support frame, for replacing propeller fixed base and submerged water jet propeller, carries out the ship resistance performance test without propeller.The present application is modularized by design, replaceable, not only reduce processing difficulty and cost, while realizing the convenient installation of propeller;And corresponding self-propelled performance and resistance performance test can be carried out on the same ship model.

Jet pump (10) for conveying a first gaseous medium (26) of a fuel cell system, comprising a housing (11) and an armature part (12) movable relative to it, wherein the armature part (12) forms an annular gap (28) in the flow path (27) of a second gaseous medium (32) with a stop sleeve (60), the gap height (36, 38) of which is variable, characterized in that the armature part (12), which limits the annular gap (28), has at least one opening (50, 52) which is passed through by the first gaseous medium (26).

The invention relates to the technical field of bearing sealing, discloses a modularized bearing sealing assembly and application of a transmission shaft of a water-jet propeller, and solves the problem that the sealing performance of a current bearing is poorer. The modularized bearing sealing assembly comprises a bearing outer ring, a bearing inner ring is arranged on the inner side of the bearing outer ring, and a ball is arranged between the bearing inner ring and the bearing outer ring; a main shaft is fixedly connected to the inner side of the bearing inner ring, a sealing mechanism is arranged at the top of the bearing outer ring, a limiting mechanism is arranged on the sealing mechanism, the sealing mechanism comprises a protection ring located above the bearing outer ring, a connecting ring is fixedly connected to the bottom of the protection ring, and a first air bag is fixedly connected to the bottom of the connecting ring; a lip seal is fixedly connected to the top of the bearing inner ring and abuts against the outer wall of the main shaft. According to the bearing, the sealing performance between the bearing inner ring and the main shaft and between the bearing inner ring and the bearing outer ring can be guaranteed, and therefore the sealing performance of the whole bearing can be improved conveniently.