CN219707301U - Modularized T-shaped nacelle type propeller - Google Patents

Abstract

The utility model relates to a modularized T-shaped pod type propeller which consists of a revolving module, a propelling module and a cooling ventilation module, wherein the propelling module is hung outside a ship body and is connected to the revolving module through a hanging column to form a T-shaped structural arrangement, and the revolving module and the cooling ventilation module are arranged in a cabin and are fixedly arranged on a ship body base. The nacelle propeller is divided into different modules, and each module is clearly divided and has a clear interface. The installation and maintenance are convenient, and the installation and maintenance period is shortened; the suspension post structure with excellent hydrodynamic performance is adopted, so that profile wing sections are optimized, the resistance of the nacelle is reduced, and the hydrodynamic performance of the nacelle is improved; the high-efficiency energy-saving driving motor is adopted, so that the cooling mode of the driving motor is optimized, and the energy consumption is reduced.

Description

Modularized T-shaped nacelle type propeller

Technical Field

The utility model relates to a ship power propulsion system, in particular to a pod type propeller.

Background

Pod-type propulsion has been developed in recent years as a new type of marine electric propulsion device. The nacelle type propeller has the structural form that a motor and a propeller are combined in a cabin, and the propeller is directly driven to rotate by the motor so as to generate power required by ship navigation. The cabin on which the motor is placed is "suspended" under the hull by means of suspension strut supports, the type of propeller being similar to an aircraft engine nacelle suspended under the wing and therefore called nacelle propeller for short.

When the navigation direction of the ship is to be changed, the steering mechanism drives the underwater part of the pod propeller to rotate to a designated rudder angle. The cabin body for arranging the driving motor is of a closed structure, so that external seawater is prevented from entering the motor cavity, and safe and reliable operation of the motor is ensured. The nacelle propeller integrates a propulsion device and a steering device, and a shafting and a steering engine device of the traditional propeller are omitted, so that the flexibility of ship design, construction and use is greatly improved, the ship propulsion efficiency is improved, and the energy consumption is reduced.

At present, the ship propulsion device mainly comprises conventional propulsion devices such as a shaft propeller, a Z-shaped propeller, an L-shaped propeller and the like. The conventional propulsion device not only occupies a large ship bilge, but also needs to be installed at a specific stage of ship construction, and the construction progress of the ship is affected if the supply period is prolonged. In order to reduce the ship bilge occupied by a propulsion device, shorten the ship construction period and improve the ship operability, a pod propeller based on a modularized design is designed and developed, the pod propeller is divided into different modules, and the installation of each module is completed in different construction periods of the ship.

At present, the pod propeller is relatively rarely applied in China, and one of the main reasons is that the pod propeller has low propulsion efficiency, linear optimization is required for ship type and underwater structure, the resistance of the underwater structure is reduced, and the propulsion efficiency of the ship is improved.

At present, a driving motor adopted by a nacelle propeller in the market mainly comprises a permanent magnet motor or a synchronous motor, and a cooling mode of the motor mainly comprises the following steps: full air cooling, water cooling and air cooling. Regardless of the cooling mode currently available, there is room for improvement. The cooling mode of the nacelle propeller driving motor is optimally designed, so that the motor can be ensured to operate in an allowable temperature rise range, and the requirement for external cooling can be reduced, thereby achieving the purpose of energy saving.

Currently, when a nacelle propeller is developed, the design of the bearing component is mainly finished by the experience of research personnel, which tends to result in a propeller with a large structural size and weight. In order to make the structure of the propeller more compact and reduce the weight of the whole machine, an advanced finite element method is adopted to simulate the strength and the rigidity of the bearing component, thereby meeting the use performance and realizing the purpose of light weight of the nacelle type propeller.

Disclosure of Invention

The utility model aims to provide a modularized T-shaped pod type propeller, which is divided into different modules, and the modules are clearly divided and have clear interfaces. The installation and maintenance are convenient, and the installation and maintenance period is shortened. A suspension post structure with excellent hydrodynamic performance is adopted, a profile wing section is optimized, the resistance of the nacelle is reduced, and the hydrodynamic performance of the nacelle is improved. The high-efficiency energy-saving driving motor is adopted, so that the cooling mode of the driving motor is optimized, and the energy consumption is reduced. The weight reduction design based on mechanical property analysis is adopted, the purpose of light weight design of the nacelle propeller is achieved, and the weight of the whole machine is reduced.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the modularized T-shaped nacelle type propeller consists of a revolving module, a propelling module and a cooling ventilation module, wherein the propelling module is hung outside a ship body and is connected to the revolving module through a hanging column to form a T-shaped structural arrangement, and the revolving module and the cooling ventilation module are arranged in a cabin and are fixedly arranged on a ship body base.

The rotary module is composed of a rotary motor, a reduction gear box, a rotary pinion, a rotary large gear, a rotary bearing, a ship body connecting plate, a slip ring device and a rotary rudder seal, wherein the rotary motor, the reduction gear box, the rotary pinion and the rotary large gear are sequentially connected to form a rotary rudder driving mechanism of the nacelle propeller, and the rotary pinion and the rotary large gear form a gear meshing transmission part of the nacelle propeller; the rotary bearing is connected with the ship body connecting plate and is used for transmitting the thrust generated by the propulsion module to the ship body and enabling the propulsion module to rotate at an angle under the action of the steering driving mechanism; the slip ring device consists of an electric slip ring, a signal slip ring and a fluid slip ring and is used for realizing power supply transmission, signal transmission and required medium transmission between the ship body and the propulsion module.

Further, the swing motor and the reduction gear box are replaced by a low-speed high-torque hydraulic motor.

Further, a braking device is arranged in the rotary motor; the reduction gear box adopts a planetary gear structure.

Further, the steering seal is composed of a plurality of rotary oil seals.

Further, the propulsion module consists of a suspension post, a thrust bearing group, a driving motor, a supporting bearing group, a propeller and a stern sealing device, wherein the suspension post consists of a flange plate, a nacelle package and a stern rudder, the driving motor is arranged in the nacelle package, the outer line type of the nacelle adopts an airfoil shape, and the nacelle package is in a revolving structure.

Further, a space for installation and maintenance is reserved in the nacelle; the nacelle packet has a diameter to propeller diameter ratio of less than 0.45.

Further, the driving motor adopts a permanent magnet motor or a synchronous motor, the driving motor comprises a stator, a rotor and a motor shaft, wherein the stator is fixed on the inner shell of the nacelle cover through interference fit or embedded, the rotor directly drives the propeller to rotate through the motor shaft to generate thrust, and the driving motor adopts an external sea water and internal ventilation dual mode for cooling.

Further, two water through holes are arranged in front of and behind the lower end of the nacelle, when the ship sails, seawater flows into the lower end of the nacelle from the front hole, flows out of the lower end of the nacelle from the rear hole, and cools the stator of the driving motor under the action of external seawater.

Further, the cooling ventilation module is composed of a cooling fan, a heat exchanger, a filter, an air inlet channel and an air outlet channel, the cooling ventilation module provides ventilation for the driving motor, air exhausted by the cooling fan is cooled through the heat exchanger and filtered through the filter, enters the inlet end of the driving motor through the air inlet channel, the slip ring device and the suspension post, flows out of the other end of the driving motor through an air gap between the stator and the rotor, then enters the suspension post and returns to the cooling fan through the air outlet channel, and ventilation circulation is completed.

The beneficial effects of the utility model are as follows:

the utility model relates to a modularized 'T' -shaped nacelle propeller, which comprises three primary modules: a rotary module, a propulsion module and a cooling and ventilating device. When the ship is built, the rotary module and the cooling and ventilating device are arranged on the ship base in advance, the propulsion module is arranged on the rotary bearing of the rotary module upwards from the bottom of the ship body before the ship is launched, the installation is convenient, the ship building period is shortened, and the installation efficiency is improved. Conventional propeller installations take about 7 to 10 days or so, whereas the "T" pod propeller installations of this modular design take only 2 to 3 days. Each primary module of the T-shaped nacelle propeller is further in a step-by-step modularized design and is divided into a secondary module and a tertiary module …, so that the interfaces of the modules are clear until the minimum element level, the assembly period of the modules can be greatly shortened, faults can be conveniently and timely found, the fault modules are replaced, and the maintenance period is shortened. The T-shaped nacelle propeller can rapidly replace the number, the type and the size of steering mechanisms in a rotary module according to different project requirements, wherein the number of the steering mechanisms is 2-4, and the power range is 45-75 kW by adopting motor drive or hydraulic motor drive; according to the required ship power, driving motors with different powers are selected, and the power range is 5 MW-10 MW.

The nacelle propeller adopts a hanging column with a T-shaped structure, and the hanging column consists of a flange plate at the upper end, a nacelle at the middle section, a nacelle bag at the lower end and the like. The nacelle of the middle section adopts an optimized NACA airfoil, and the nacelle bag at the lower end is a revolution body. According to different ship types, the height of the nacelle at the middle section of the suspension column can be increased or reduced, and the requirement that the minimum clearance between the blade tip of the propeller and the bottom of the ship is more than or equal to 0.26D is met. The diameter of the suspension column revolving body can be changed according to the type and the size of the driving motor, but the ratio of the diameter D0 of the revolving body to the diameter D of the propeller is ensured to be less than or equal to 0.45.

The propeller adopts a permanent magnet or synchronous motor as a propeller driving motor. The drive motor is arranged in the nacelle of the suspension post, and in order to improve the cooling effect of the drive motor, the stator of the drive motor is directly contacted with the nacelle and connected through interference fit. The driving motor is cooled by adopting an external seawater and internal closed ventilation dual mode, a temperature sensor is arranged in a stator of the driving motor, the running temperature of the stator is monitored, the cooling air quantity is automatically regulated through an internal control system, the energy consumption is saved to the greatest extent, and the energy saving reaches more than 10%.

The nacelle propeller adopts a finite element simulation analysis method to optimally design the structure. The mechanical property of the nacelle propeller structure is analyzed, the weak part is reinforced, and the non-main bearing part is subjected to weight reduction design, so that the total weight of the nacelle propeller is reduced by more than 5%.

The propulsion efficiency of the developed nacelle propeller reaches more than 0.6 by adopting modularized, efficient and low-resistance T-shaped hanging columns, efficient propulsion motors, optimized weight-reduction design and the like.

Drawings

FIG. 1 is a "T" pod propeller module layout;

FIG. 2 is a diagram of a rotary module configuration;

FIG. 3 is a propulsion module structural layout;

FIG. 4 is a structural outline view of a suspension post;

FIG. 5 is a structural layout of a drive motor;

FIG. 6 is a schematic diagram of a "T" pod propeller cooling composition;

FIG. 7 is a "T" pod propeller mechanics calculation model;

in the figure: 1. the device comprises a rotary module, a rotary motor, a reduction gear box, a rotary pinion, a rotary large gear, a rotary bearing, a ship body connecting plate, a slip ring device and a rudder seal, wherein the rotary module comprises a rotary motor, a reduction gear box, a rotary pinion, a rotary large gear, a rotary bearing, a ship body connecting plate, a slip ring device and a rudder seal, and the slip ring device comprises a rotary module, a rotary motor, a reduction gear box, a rotary pinion, a rotary bearing and a rudder seal; 2. a propulsion module 2a, a lifting column (2 a-1, a flange plate, 2a-2, a nacelle, 2a-3, a nacelle cover, 2a-4, a tail vane), 2b, a thrust bearing assembly, 2c, a drive motor (2 c-1, a stator, 2c-2, a rotor, 2c-3, a motor shaft), 2d, a support bearing assembly, 2e, a propeller, 2f, a stern seal; 3. the cooling and ventilating module comprises a cooling and ventilating module, and 3a cooling fan, 3b heat exchanger, 3c filter, 3d air inlet duct and 3e air outlet duct.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

As shown in fig. 1, the modularized T-shaped pod type propeller mainly comprises three modules, namely a rotation module 1, a propulsion module 2 and a cooling and ventilating module 3. The propulsion module 2 is suspended outside the hull and connected to the swivel module 1 by means of suspension posts. The swivel module 1 and the cooling and ventilating module 3 are in the cabin and fixedly mounted on the hull base a. The pod propeller is arranged in a "T" configuration and is therefore referred to as a "T" pod propeller.

As shown in fig. 2, the revolving module 1 of the pod propeller mainly includes a revolving motor 1a, a reduction gear box 1b, a revolving pinion 1c, a revolving bull gear 1d, a revolving bearing 1e, a hull connection plate 1f, a slip ring device 1g, a steering seal 1h, and the like. The turning motor 1a, the reduction gear box 1b, the turning pinion 1c, and the turning bull gear 1d constitute a steering drive mechanism of the pod propeller. The number, power and torque of the steering driving mechanisms are selected according to the steering moment, the steering speed and the reliability requirements, and 2 or 4 sets of steering driving mechanisms are generally arranged. The torque and the steering speed output from the steering drive mechanism are transmitted to the slewing bearing 1e. In order to reduce the space and adapt to the impact load working condition, the rotary motor 1a and the reduction gearbox 1b can be replaced by a low-speed high-torque hydraulic motor on the premise of meeting the steering performance of the nacelle propeller. The rotating electric machine 1a needs to have a built-in brake device in order to fix the rudder angle of the nacelle propeller in case of emergency or maintenance. In order to reduce the structural size of the swing module 1, the reduction gear box 1b adopts a planetary gear structure, and the reduction gear box of this type not only transmits a large rated torque, but also has a small structural size. The rotary pinion 1c and the rotary bull gear 1d form a gear engagement transmission part of the pod propeller, and the output rotation speed of the steering driving mechanism is further reduced and the output torque is increased by designing a proper reduction ratio. The swivel bearing 1e is connected with the ship body connecting plate 1f, and is used for transmitting thrust generated by the propulsion module 2 to the ship body and enabling the propulsion module 2 to swivel 360 degrees under the action of the rudder turning driving mechanism. The slip ring device 1g is composed of an electric slip ring, a signal slip ring, a fluid slip ring and the like, and has the functions of realizing power supply transmission, signal transmission and required medium transmission between a ship body and the propulsion module 2. The steering seal 1h consists of a plurality of rotary oil seals, so that the lubricating medium in the rotary module 1 can be prevented from leaking into the ocean to cause environmental pollution; but also can prevent the outside seawater from entering the rotary module 1 to cause the failure of the lubricating medium. The rotary module 1 is connected with the propulsion module 2 through a rotary bearing 1e, and the interface is simple and clear. When the ship is built, the rotary module 1 is arranged on the ship body base in advance, the propulsion module 2 is arranged on the rotary bearing 1e of the rotary module 1 upwards from the bottom of the ship body before the ship is launched, the installation is convenient, the ship building period is shortened, and the assembly efficiency is improved.

As shown in fig. 3, the propulsion module 2 of the pod thruster mainly consists of a suspension post 2a, a thrust bearing set 2b, a driving motor 2c, a support bearing set 2d, a propeller 2e, a stern sealing device 2f, and the like. As shown in fig. 4, the suspension post 2a is composed of a flange plate 2a-1, a nacelle 2a-2, a nacelle packet 2a-3, a tail vane 2a-4, and the like. The nacelle 2a-2 of the suspension column 2a has a space for installation and maintenance, and the nacelle packet 2a-3 has a drive motor 2c installed therein. The outer line type of the nacelle 2a-2 adopts NACA airfoil with excellent hydrodynamic performance, the nacelle 2a-3 is a revolution body structure, and the ratio of the diameter D0 of the nacelle to the diameter D of the propeller is smaller than 0.45. The aerofoil of the nacelle 2a-2, the position of the tail vane 2a-4, and the position between the propeller 2e and the suspension post 2a are optimized by performing hydrodynamic performance simulation analysis using an advanced CFD method. Through CFD simulation optimization design, the resistance of the suspension post is reduced, and the propulsion efficiency of the nacelle propeller is improved.

The driving motor 2c is a permanent magnet motor or a synchronous motor. As shown in fig. 5, the drive motor 2c includes a stator 2c-1, a rotor 2c-2, and a motor shaft 2c-3. Wherein, stator 2c-1 is fixed on nacelle package 2a-3 inner shell through interference fit or inlay, and rotor 2c-2 passes through motor shaft 2c-3 direct drive screw 2e and rotates, produces thrust. The driving motor 2c is cooled by both external seawater and internal ventilation. Two water through holes are arranged in front of and behind the lower end of the nacelle 2a-2, when the ship sails, seawater flows into the lower end of the nacelle 2a-2 from the front hole, flows out of the lower end of the nacelle 2a-2 from the rear hole, and cools the stator 2c-1 of the driving motor 2c under the action of external seawater. In addition, a cooling and ventilating module 3 is arranged in the cabin, and the cooling and ventilating module 3 is composed of a cooling fan 3a, a heat exchanger 3b, a filter 3c, an air inlet duct 3d, an air outlet duct 3e and the like, as shown in fig. 6. The cooling ventilation module 3 provides ventilation for the driving motor 2c, air discharged by the cooling fan 3a is cooled by the heat exchanger 3b and filtered by the filter 3c, then enters the inlet end of the driving motor 2c through the air inlet duct 3d, the slip ring device 1g and the hanging column 2a, flows out of the other end of the driving motor 2c through an air gap between the stator 2c-1 and the rotor 2c-2, then enters the hanging column 2a and returns to the cooling fan 3a through the air outlet duct 3e, and ventilation circulation is completed, as shown in fig. 6. The cooling and ventilating module 3 of the nacelle propeller adopts closed circulation cooling, and the heat exchanger 3b realizes heat exchange through fresh water or seawater. The driving motor 2c is cooled by adopting an external seawater and internal ventilation dual mode, so that the cooling effect is improved, the requirement on cooling air quantity is reduced, and the energy consumption is reduced. Furthermore, the cooling ventilation discharged by the cooling ventilation module 3 passes through the slip ring device 1g, and the electrical energy transmission element of the slip ring can be cooled, and the slip ring device 1g does not need to be provided with additional cooling equipment. The temperature sensor is arranged in the stator 2c-1 of the driving motor 2c, the running temperature of the stator 2c-1 is monitored, the running of the cooling fan 3a of the cooling ventilation module 3 is automatically regulated through the internal control system, the energy consumption is saved to the greatest extent, and the energy saving reaches 10% through the optimal design.

By using a finite element simulation analysis method, a mechanical calculation model of the nacelle propeller rotation module 1 and the propulsion module 2 is established, as shown in fig. 7, load analysis is carried out on bearing parts under different working conditions, such as a rotation bearing 1e, a ship body connecting plate 1f, a suspension post 2a, a thrust bearing group 2b, a support bearing group 2d and the like, and stress and strain values are extracted. On the premise of meeting the strength and rigidity, the structure and the size of each part are optimized, so that the weight of the whole nacelle propeller is reduced by more than 5%.

Example 1: according to the stated utility model content of the T-shaped pod type propeller, a 10 MW-level high-power pod type propeller is designed and developed. The system is divided into a rotary module 1, a propulsion module 2 and a cooling ventilation module 3 in a composition mode, and adopts a T-shaped structure arrangement.

During assembly, the assembly of the swing module 1, the propulsion module 2 and the cooling ventilation module 3 is completed independently at the factory. When the propulsion module 2 is assembled, the thrust bearing group 2b, the support bearing group 2d and the driving motor 2c are assembled firstly; then, connecting the groups, and completing the assembly with the hanging column 2 a; then, the stern sealing device 2f and the propeller 2e are installed in order, so that the assembly of the propulsion module 2 is completed. When the rotary module 1 is assembled, the connection between the rotary bearing 1e and the ship body connecting plate 1f is finished firstly, and the running condition of the rotary bearing is checked; then finishing the installation of the steering seal 1h, and checking the installation condition of the seal; then, the installation of the rotary large gear 1d, the reduction gear box 1b, the rotary motor 1a, and the slip ring device 1g is completed in order from bottom to top. The rotary pinion 1c is mounted on the output shaft of the reduction gear box 1b in advance. In order to shorten the ship construction period, the swing module 1 and the cooling and ventilating module 3 are pre-installed in the cabin before the hull sections are closed. The propulsion module 2 is mounted to the turning module 1 from the bottom of the hull upwards before the vessel is launched.

Example 2: according to the stated utility model content of the T-shaped pod type propeller, a 10 MW-level high-power pod type propeller is designed and developed. The suspension post of the nacelle propeller adopts NACA airfoil with excellent hydrodynamic performance, the ratio of the diameter D0 of the nacelle packet to the diameter D of the propeller is 0.38, and the propulsion efficiency reaches 0.64.

Example 3: according to the stated utility model content of the T-shaped pod type propeller, a 10 MW-level high-power pod type propeller is designed and developed. The nacelle propeller adopts a finite element simulation analysis method to optimally design the structure. And (3) analyzing the mechanical property of the nacelle propeller structure, reinforcing the weak part, and carrying out weight reduction design on the non-main bearing part. The weight of the whole machine before the weight reduction of the nacelle propeller is 150t, the weight of the whole machine is reduced to 135t after optimization, and the weight of the whole machine is reduced by about 10 percent.

Claims (10)

1. A modular "T" pod-type propeller, characterized by: the ship comprises a revolving module, a propelling module and a cooling and ventilating module, wherein the propelling module is hung outside a ship body and is connected to the revolving module through a hanging column to form a T-shaped structure arrangement, and the revolving module and the cooling and ventilating module are arranged in a cabin and are fixedly arranged on a ship body base.

2. The modular "T" pod propeller of claim 1, wherein: the rotary module consists of a rotary motor, a reduction gear box, a rotary pinion, a rotary large gear, a rotary bearing, a ship body connecting plate, a slip ring device and a rotary rudder seal, wherein the rotary motor, the reduction gear box, the rotary pinion and the rotary large gear are sequentially connected to form a rotary rudder driving mechanism of the nacelle propeller, and the rotary pinion and the rotary large gear form a gear meshing transmission part of the nacelle propeller; the rotary bearing is connected with the ship body connecting plate and is used for transmitting the thrust generated by the propulsion module to the ship body and enabling the propulsion module to rotate by 360 degrees under the action of the steering driving mechanism; the slip ring device consists of an electric slip ring, a signal slip ring and a fluid slip ring and is used for realizing power supply transmission, signal transmission and required medium transmission between the ship body and the propulsion module.

3. The modular "T" pod propeller of claim 2, wherein: the rotary motor and the reduction gear box are replaced by a low-speed high-torque hydraulic motor.

4. The modular "T" pod propeller of claim 2, wherein: the rotary motor is internally provided with a brake device; the reduction gear box adopts a planetary gear structure.

5. The modular "T" pod propeller of claim 2, wherein: the steering seal consists of a plurality of rotary oil seals.

6. The modular "T" pod propeller of claim 1, wherein: the propulsion module consists of a suspension post, a thrust bearing group, a driving motor, a supporting bearing group, a propeller and a stern sealing device, wherein the suspension post consists of a flange plate, a nacelle package and a tail rudder, the driving motor is arranged in the nacelle package, the outer line type of the nacelle adopts an airfoil shape, and the nacelle package is a revolving body structure.

7. The modular "T" pod propeller of claim 6, wherein: a space for installation and maintenance is reserved in the nacelle; the nacelle packet has a diameter to propeller diameter ratio of less than 0.45.

8. The modular "T" pod propeller of claim 6, wherein: the driving motor adopts a permanent magnet motor or a synchronous motor, and comprises a stator, a rotor and a motor shaft, wherein the stator is fixed on the inner shell of the nacelle cover through interference fit or embedded, the rotor directly drives the propeller to rotate through the motor shaft to generate thrust, and the driving motor adopts an external sea water and internal ventilation dual mode for cooling.

9. The modular "T" pod propeller of claim 6, wherein: the lower end of the nacelle is provided with two water through holes at the front and the back, when the ship sails, seawater flows into the lower end of the nacelle from the front hole, flows out of the lower end of the nacelle from the back hole, and cools the stator of the driving motor under the action of external seawater.

10. The modular "T" pod propeller of claim 1, wherein: the cooling ventilation module is composed of a cooling fan, a heat exchanger, a filter, an air inlet channel and an air outlet channel, the cooling ventilation module provides ventilation for the driving motor, air exhausted by the cooling fan is cooled by the heat exchanger and filtered by the filter, enters the inlet end of the driving motor through the air inlet channel, the slip ring device and the lifting column, flows out of the other end of the driving motor through an air gap between the stator and the rotor, then enters the lifting column and returns to the cooling fan through the air outlet channel, and ventilation circulation is completed.