CN115723929A - Pod propeller and ship - Google Patents

Abstract

The invention relates to the technical field of thrusters, in particular to a pod thruster and a ship. The pod propeller includes an underwater housing, a propeller, a double-winding motor, a slip ring assembly and double backup cables, and the propeller is installed in the underwater housing. The double-winding motor includes a stator core, a first winding and a second winding. The stator core is arranged in an underwater housing. The coils of the first winding and the second winding are insulated and spaced along the circumference of the stator core. The slip ring assembly includes two conductive rings, and the double backup cable includes a first cable assembly and a second cable assembly, wherein one conductive ring is conductively connected with the first terminal block of the first winding through the first cable assembly, and the other conductive ring is connected through the first cable assembly. The second cable assembly is conductively connected with the second terminal block of the second winding, so that the double-winding motor can drive the blades of the propeller to rotate. The ship includes the above-mentioned pod propeller, and the safe and reliable operation of the ship is realized by increasing the redundancy of the pod propeller.

Description

A pod propeller and ship

technical field

The invention relates to the technical field of thrusters, in particular to a pod thruster and a ship.

Background technique

The pod propeller is an important part of the ship's power equipment. The pod propeller places the winding motor in the underwater shell of the cabin, and the winding motor drives the propeller to complete the propulsion work.

At present, the power system of the ship transmits the electric energy to the winding motor of the pod propulsion through the slip ring assembly and the cable assembly for electric power transmission to realize the electric energy transmission. When any one of the slip ring assembly, cable assembly and winding motor is damaged, the entire pod propeller will fail and shut down, thereby affecting the normal navigation of the ship.

Therefore, need a kind of pod propeller and ship badly to solve the above problems.

Contents of the invention

The object of the present invention is to provide a pod propeller and a ship, improve the redundancy of the pod propeller, and realize safe and reliable operation of the pod propeller.

For reaching this purpose, the technical scheme adopted in the present invention is:

A pod propeller comprising:

an underwater housing and a propeller, the propeller is installed in the underwater housing;

A double-winding motor, including a stator core, a first winding, and a second winding, the stator core is arranged in the underwater casing, and the coils of the first winding and the second winding are along the stator core Circumferentially insulated and spaced; and

A slip ring assembly and a double backup cable, the slip ring assembly includes two conductive rings, the double backup cable includes a first cable assembly and a second cable assembly, wherein one of the conductive rings is connected to the first cable assembly through the first cable assembly The first terminal block of the first winding is conductively connected, and the other conductive ring is conductively connected with the second terminal block of the second winding through the second cable assembly, so that the double-winding motor can be driven The blades of the propeller rotate.

As a preferred solution, the slip ring assembly also includes:

The slip ring box is arranged on the upper end of the underwater housing and communicates with the underwater housing; and

The signal slip ring, the signal slip ring and the two conductive rings are arranged up and down in the slip ring box, and the signal slip ring and the two conductive rings are respectively fixed on the slip ring through their respective stators inside the box, and are connected through their respective rotors.

As a preferred solution, the slip ring assembly also includes:

The oil distribution collar, the upper end of the rotor of the signal slip ring protrudes from the slip ring box and is connected with the rotary joint of the oil distribution collar.

As a preferred solution, the pod propeller also includes a dual-system control unit, the dual-system control unit includes a display panel, a central control box, a local control box and a frequency converter, and the display panel can communicate with the central control box and the The frequency converters are sequentially connected by communication to form a main control system; or, the display panel can be sequentially connected by communication with the local control box and the frequency converter to form a backup control system; the main control system and the The standby control system controls the slip ring assembly and the propeller through the frequency converter.

As a preferred solution, the display panel includes a left-wing panel, a main panel and a right-wing panel, the main panel is connected to the left-wing panel and the right-wing panel respectively, and the left-wing panel and the right-wing panel are both connected to the The central control box is connected by communication, so that the display panel and the central control box form a ring network.

As a preferred solution, the pod propeller also includes a cooling mechanism, and the cooling mechanism includes:

A plurality of fan assemblies, the fan assembly includes a fan and a casing, the fan is arranged in the casing, and the casing has an inlet and an outlet;

An air duct, the interior of the air duct is divided to form an air inlet pipe and an air outlet pipe, one end of the air inlet pipe and the air outlet pipe can communicate with the underwater housing, and the other end of the air inlet pipe It can be selectively communicated with the inlet of one or more sets of the casings of the fan assemblies, and the other end of the air outlet duct can be selectively connected with the casings of the corresponding one or more sets of the fan assemblies. The inlets are connected to form a circulating air duct; and

A water cooler is arranged in the circulating air duct to cool the air in the circulating air duct.

As a preferred solution, the fan assembly is provided with two groups, wherein the inlet of the casing of one group of the fan assembly is communicated with the air inlet duct and the outlet is communicated with the air outlet duct, so that the two groups of The fan components are active and standby for each other.

As a preferred solution, the fan assembly is provided with two groups, the inlets of the casings of the two groups of fan assemblies can communicate with the air inlet ducts respectively, and the outlets of the casings of the two groups of fan assemblies can be connected to each other. They are respectively communicated with the air outlet ducts, and the fans of the two sets of fan assemblies can be turned on simultaneously.

As a preferred solution, the double backup cable further includes a cooling pipe, and the first cable assembly and the second cable assembly are distributed around the cooling pipe.

A ship includes the above-mentioned pod propeller.

The beneficial effects of the present invention are:

The pod propeller proposed by the invention includes an underwater casing, a propeller, a double-winding motor, a slip ring assembly and double backup cables. One conductive ring is conductively connected with the first terminal block of the first winding through the first cable assembly, and the other conductive ring is conductively connected with the second terminal block of the second winding through the second cable assembly, so that the double-winding motor can drive The blades of the propeller turn. Pod thruster redundancy is increased through the use of dual winding motors, a slip ring assembly with two conductive rings and dual backup cables. The pod propeller has the ability to operate at 50% power even after damage to one of the two windings of the double-winding motor, one of the two conductive rings, or one of the two cable assemblies in the dual backup cable, The safe and reliable operation of the pod propeller is realized.

The ship proposed by the present invention includes the above-mentioned pod propeller, and by improving the redundancy of the pod propeller, one of the two windings of the double-winding motor in the pod propeller and the two conductive rings of the slip ring assembly After one of the cables or one of the two cable components in the double backup cable is damaged and fails, the pod propeller still has the ability to operate at 50% power, which realizes the safe and reliable operation of the pod propeller.

Description of drawings

Fig. 1 is a structural schematic diagram of a pod propeller provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a double-winding motor provided by an embodiment of the present invention;

Fig. 3 is a partial enlarged view of place A in Fig. 2;

Fig. 4 is a schematic structural diagram of a slip ring assembly provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a cooling mechanism provided by an embodiment of the present invention;

Fig. 6 is a longitudinal sectional view of a cooling mechanism provided by an embodiment of the present invention;

Fig. 7 is a schematic block diagram of a dual-system control unit provided by an embodiment of the present invention.

The names and labels of the components in the figure are as follows:

1. Underwater shell; 2. Propeller; 21. Blade; 3. Double-winding motor; 31. Stator core; 32. First winding; 321. First wiring bar; 33. Second winding; 331. The first winding Second terminal block; 4. Slip ring assembly; 41. Slip ring box; 42. Conductive ring; 43. Signal slip ring; 44. Oil distribution collar; 5. Display panel; 51. Left wing panel; 52. Main panel; 53. Right wing panel; 6. Central control box; 7. Local control box; 8. Inverter; 9. Cooling mechanism; 91. Fan assembly; 911. Fan; 912. Case; 92. Air duct; 921. Air intake Pipeline; 922, air outlet pipeline; 93, water cooler; 10, transformer.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

As shown in FIG. 1 , this embodiment proposes a pod propeller, which includes an underwater casing 1 and a propeller 2 , and the propeller 2 is installed in the underwater casing 1 . The pod thruster can be installed in various ships such as diving supply ships, supply ships, shuttle tankers, ro-ro ships and icebreakers.

Currently, the winding motor of the pod propulsion and the cable assembly for power transmission are installed in the underwater housing 1, and the power system on the ship transmits electric energy to the winding motor through the slip ring assembly and the cable assembly. When any one of the slip ring assembly, cable assembly and winding motor is damaged, the entire pod propeller will fail and shut down, thereby affecting the normal navigation of the ship.

In order to solve the above problems, as shown in Figures 1 to 4, the pod propeller of this embodiment also includes a double-winding motor 3, a slip ring assembly 4 and double backup cables, and the double-winding motor 3 includes a stator core 31, a first The winding 32 and the second winding 33 , and the stator core 31 are arranged in the underwater housing 1 , and the coils of the first winding 32 and the second winding 33 are insulated and distributed at intervals along the circumferential direction of the stator core 31 . The slip ring assembly 4 includes two conductive rings 42, and the double backup cable includes a first cable assembly and a second cable assembly, wherein one conductive ring 42 is conductively connected to the first terminal block 321 of the first winding 32 through the first cable assembly, Another conductive ring 42 is conductively connected with the second terminal block 331 of the second winding 33 through the second cable assembly, so that the double-winding motor 3 can drive the blade 21 of the propeller 2 to rotate.

In this embodiment, the redundancy of the pod propeller is improved by adopting the double-winding motor 3, the slip ring assembly 4 with two conductive rings 42 and double backup cables. Even after one of the two windings of the double-winding motor 3, one of the two conductive rings 42 of the slip ring assembly 4, or one of the two cable assemblies in the double backup cable fails, the pod propeller still has the following functions: The ability to operate at 50% power enables safe and reliable operation of the pod propeller. The pod propulsion with double winding and above redundant structure has many advantages such as high load capacity, compact structure, high redundancy and long life.

It should be noted that the power system on the ship can transfer the electric energy to the double-winding motor 3 through the slip ring assembly 4 and the double backup cable after the voltage regulation by the transformer 10 and the frequency modulation by the frequency converter 8, so that the double-winding motor 3 can The blades 21 of the propeller 2 are driven to rotate, so that the stable operation of the pod propeller is realized.

The stator core 31 of the double-winding motor 3 in this embodiment is formed by laminating silicon steel sheets through punching. After lamination, the inner diameter and groove size of the stator core are more compact and the efficiency is higher. The mutually insulated first winding 32 and the second winding 33 are connected independently on the stator core 31, and the structure of the double winding enables the two windings to be independently designed and manufactured, greatly reducing the 3 The processing difficulty is low, and at the same time, the double-winding motor 3 has the characteristics of high redundancy, high transmission efficiency and easy maintenance. Even if one of the first winding 32 and the second winding 33 breaks down, the double-winding motor 3 can continue to run at 50% power, so as to avoid the failure of the pod propeller to shut down.

As shown in Figures 2 and 3, the first terminal block 321 of the first winding 32 of this embodiment is connected to the first cable assembly through bolts, and the second terminal block 331 of the second winding 33 is connected to the second cable assembly through The bolts are tightly connected to improve the connection strength between the winding and the cable assembly and ensure the stability of power transmission.

As shown in FIGS. 1 and 4 , the slip ring assembly 4 further includes a slip ring case 41 , a signal slip ring 43 and an oil distribution collar 44 . The slip ring box 41 is arranged on the upper end of the underwater housing 1 and communicates with the underwater housing 1 . A signal slip ring 43 and two conductive rings 42 are arranged up and down in the slip ring box 41. The signal slip ring 43 and the two conductive rings 42 are respectively fixed in the slip ring box 41 through their respective stators, and passed through their respective rotors. conduction connection. The upper end of the rotor of the signal slip ring 43 extends out of the slip ring case 41 and is connected with the rotary joint of the oil distribution collar 44 .

As shown in Figure 4, the slip ring assembly 4 of this embodiment adopts a segmented dual redundant conductive structure, and the two conductive rings 42 are U1/V1/W1 rotor copper ring and U2/V2/W2 rotor copper ring respectively, and The three rotor copper rings of U1, V1 and W1 are interlaced with the three rotor copper rings of U2, V2 and W2. By increasing the number of conductive rings 42 in the slip ring assembly 4, the slip ring assembly 4 has a dual redundant conductive structure, which not only enables power transmission, sensor signal transmission, and transmission and recovery of required media when the propeller 2 rotates 360° . Moreover, even after one of the conductive rings 42 fails, the slip ring assembly 4 still has 50% power transmission capacity. At the same time, the two conductive rings 42 are installed at intervals without interfering with each other, which is convenient for later replacement, maintenance and maintenance operations.

It should be noted that the slip ring assembly 4 is specifically a multi-media slip ring assembly, specifically including a power slip ring, a signal slip ring 43 , an oil distribution collar 44 , a cooling fan 911 , a power junction box, and the like. Wherein, besides the above-mentioned two conductive rings 42, the power slip ring also includes conventional components such as a brush holder, a stator, an insulating support body, and a conductive copper bar. The signal ring includes conventional components such as rotor copper ring, stator, and signal wire. The oil distribution collar 44 mainly includes conventional components such as a stator ring, a lubricating oil liquid ring, a grease ring and a high-pressure air ring. The stator ring of the oil distribution collar 44 is fixedly installed on the slip ring case 41 , and each medium ring inside the oil distribution collar 44 performs medium transmission along with the rotation process. The specific installation positions and matching relationships of the above-mentioned conventional components are prior art, and will not be repeated here.

The first cable assembly and the second cable assembly of this embodiment are laid in the underwater housing 1 , and the first cable assembly and the second cable assembly can transmit 50% of the power to the double-winding motor 3 respectively. Even if one of the first cable assembly and the second cable assembly fails, the double-winding motor 3 can still be continuously operated at 50% power, so as to prevent the pod propeller from shutting down due to failure.

Further, the double backup cable also includes a cooling pipe, and the first cable assembly and the second cable assembly are distributed around the cooling pipe. The cooling pipe can be connected with the cooling system of the pod propeller, so that the cooling water circulates through the cooling pipe to cool down the first cable assembly and the second cable assembly, ensure the safe use of dual backup cables, and improve the stability of power transmission sex and reliability.

As shown in Figure 1, the pod propeller also includes a cooling mechanism 9, which can cool the underwater casing 1 and the slip ring box 41, so as to ensure that the pod propeller operates reliably within a suitable temperature range .

Specifically, as shown in FIGS. 5 and 6 , the cooling mechanism 9 includes multiple sets of fan assemblies 91 , air ducts 92 and water coolers 93 . The fan assembly 91 includes a fan 911 and a casing 912, the fan 911 is disposed in the casing 912, and the casing 912 has an inlet and an outlet. The inner partition of the air duct 92 forms an air inlet duct 921 and an air outlet duct 922. One end of the air inlet duct 921 and the air outlet duct 922 can be communicated with the underwater housing 1, and the other end of the air inlet duct 921 can be selectively connected to it. The inlet of the casing 912 of one or more groups of fan assemblies 91 is connected, and the other end of the air outlet duct 922 can be selectively communicated with the inlet of the casing 912 of one or more groups of fan assemblies 91 to form a circulation air duct. The water cooler 93 is arranged in the circulating air duct to cool the air in the circulating air duct.

Multiple sets of fan assemblies 91 can be connected to the air duct 92 to form a circulating air duct, which has a simple structure and is easy to install and maintain. The cooling mechanism 9 can flexibly select one or more groups of fan assemblies 91 to be connected to the air duct 92 to increase the air flow in the circulating air duct, thereby improving the cooling effect. Moreover, multiple groups of fan assemblies 91 are mutually active and standby, realizing redundant cooling and cooling of the interior of the underwater housing 1 and the slip ring box 41 , so that the cooling mechanism 9 has multiple redundancy.

Specifically, two groups of fan assemblies 91 are provided, wherein the inlet of the casing 912 of one group of fan assemblies 91 communicates with the air inlet duct 921 and the outlet communicates with the air outlet duct 922, so that the two groups of fan assemblies 91 are mutually active and standby. Or, the fan assembly 91 is provided with two groups, the inlets of the casings 912 of the two groups of fan assemblies 91 can communicate with the air inlet ducts 921 respectively, and the outlets of the casings 912 of the two groups of fan assemblies 91 can communicate with the air outlet ducts 922 respectively, And the fans 911 of the two groups of fan assemblies 91 can be turned on at the same time. The two sets of fan assemblies 91 can not only serve as backups for each other, but can also be turned on simultaneously according to the cooling and cooling requirements of the propellers, which enhances the redundant cooling and cooling capabilities.

It should be noted that the air duct 92 communicates with the underwater housing 1 through the slip ring box 41 . In addition, multiple groups of fan assemblies 91 share one air duct 92 , which simplifies the structure of the cooling mechanism 9 and realizes the compact arrangement of the cooling mechanism 9 .

Specifically, when the air duct 92 communicates with the slip ring case 41, the air flow trajectory in the circulating air duct is shown by the arrow in Figure 6, and the air in the slip ring case 41 and the underwater housing 1 enters the air intake duct 921, then enter the air outlet duct 922 under the drive of the fan 911 and be cooled by the water cooler 93 and then re-enter the slip ring box 41 and the underwater housing 1 to realize circulating cooling.

As shown in Figure 7, the pod propeller also includes a dual system control unit, the dual system control unit includes a display panel 5, a central control box 6, a local control box 7 and a frequency converter 8, and the display panel 5 can communicate with the central control box 6 and The frequency converter 8 is sequentially connected by communication to form a main control system. Alternatively, the display panel 5 can communicate with the local control box 7 and the frequency converter 8 in order to form a backup control system. Both the main control system and the backup control system control the slip ring assembly 4 and the propeller 2 through the frequency converter 8 .

Specifically, the display panel 5 includes a left-wing panel 51, a main panel 52 and a right-wing panel 53, the main panel 52 communicates with the left-wing panel 51 and the right-wing panel 53 respectively, and both the left-wing panel 51 and the right-wing panel 53 communicate with the central control box 6 , so that the display panel 5 and the central control box 6 form a ring network. The main control system is in the follow-up control mode, which can accurately control the operating parameters of the slip ring assembly 4 in the pod thruster and the propeller 2 through the frequency converter 8, so as to ensure the stable and reliable operation of the propeller 2. The backup control system is a non-follow-up mode. When any single station in the main control system fails, the backup control system is activated to ensure that the propeller 2 can still operate reliably.

It should be noted that the dual-system control unit also includes monitoring components for monitoring various components in the pod propeller, and the detection components may be temperature sensors, vibration sensors, and the like. The monitoring part can feed back all monitoring data to the display panel 5 in real time. The specific monitoring data can include parameters such as the temperature of the double-winding motor 3, the internal temperature of the slip ring assembly 4, and the liquid level of the oil to display the pod propeller All the working states of the pod are convenient for the dual-system control unit to accurately control the safe and stable operation of the pod propeller according to the monitoring data. Since the above-mentioned monitoring components are in the prior art, and the monitoring parameters can be flexibly increased or decreased, details will not be repeated here.

This embodiment also proposes a ship, the ship includes the above-mentioned pod propeller, by improving the redundancy of the pod propeller, even if one of the two windings of the double-winding motor 3 and the two windings of the slip ring assembly 4 After one of the conductive rings 42 or two cable components in the double backup cable is damaged and fails, the pod propulsion can still operate at 50% power, avoiding the shutdown of the pod propulsion and realizing the safe and reliable operation of the ship.

The above embodiments only set forth the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. On the premise of not departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A pod propeller, characterized in that, comprising: an underwater housing (1) and a propeller (2), the propeller (2) being installed in the underwater housing (1); A double-winding motor (3), including a stator core (31), a first winding (32) and a second winding (33), the stator core (31) is arranged in the underwater housing (1), Coils of the first winding (32) and the second winding (33) are insulated and distributed at intervals along the circumferential direction of the stator core (31); and A slip ring assembly (4) and a double backup cable, the slip ring assembly (4) includes two conductive rings (42), the double backup cable includes a first cable assembly and a second cable assembly, one of the conductive rings (42) conduction connection with the first terminal block (321) of the first winding (32) through the first cable assembly, and the other conductive ring (42) is connected with the second cable assembly through the second cable assembly The second terminal block (322) of the second winding (33) is conductively connected, so that the double-winding motor (3) can drive the blade (21) of the propeller (2) to rotate. 2. The pod propeller according to claim 1, characterized in that, the slip ring assembly (4) further comprises: The slip ring box (41) is arranged on the upper end of the underwater housing (1) and communicates with the underwater housing (1); and Signal slip ring (43), described signal slip ring (43) and two described conductive rings (42) are arranged up and down in the described slip ring box (41), described signal slip ring (43) and two The conductive rings (42) are respectively fixedly arranged in the slip ring case (41) through their respective stators, and are conductively connected through their respective rotors. 3. The pod propeller according to claim 2, characterized in that, the slip ring assembly (4) further comprises: The oil distribution collar (44), the upper end of the rotor of the signal slip ring (43) protrudes from the slip ring box (41) and is connected with the rotary joint of the oil distribution collar (44). 4. The pod propeller according to claim 1, characterized in that, the pod propeller also includes a dual-system control unit, and the dual-system control unit includes a display panel (5), a central control box (6) . The local control box (7) and the frequency converter (8), the display panel (5) can communicate with the central control box (6) and the frequency converter (8) in order to form a main control system; or , the display panel (5) can communicate with the local control box (7) and the frequency converter (8) sequentially to form a backup control system; the main control system and the backup control system are both connected through the The frequency converter (8) controls the slip ring assembly (4) and the propeller (2). 5. The pod propeller according to claim 4, characterized in that, the display panel (5) comprises a left wing panel (51), a main panel (52) and a right wing panel (53), and the main panel (52 ) are respectively connected in communication with the left wing panel (51) and the right wing panel (53), and both the left wing panel (51) and the right wing panel (53) are connected in communication with the central control box (6), So that the display panel (5) and the central control box (6) form a ring network. 6. The pod propeller according to claim 1, characterized in that, the pod propeller also comprises a cooling mechanism (9), and the cooling mechanism (9) comprises: A plurality of fan assemblies (91), the fan assembly (91) includes a fan (911) and a casing (912), the fan (911) is arranged in the casing (912), and the casing (912 ) has an inlet and an outlet; An air duct (92), the inner partition of the air duct (92) forms an air inlet duct (921) and an air outlet duct (922), and one end of the air inlet duct (921) and the air outlet duct (922) It can communicate with the underwater housing (1), and the other end of the air inlet duct (921) can be selectively connected to the inlet of one or more sets of casings (912) of the fan assembly (91). communicated, and the other end of the air outlet duct (922) can be selectively communicated with the inlet of the casing (912) of one or more sets of the corresponding fan assembly (91), so as to form a circulating air duct; and A water cooler (93) is arranged in the circulating air duct to cool the air in the circulating air duct. 7. The pod propeller according to claim 6, characterized in that, the fan assembly (91) is provided with two groups, wherein one group of inlets of the casing (912) of the fan assembly (91) It communicates with the air inlet duct (921) and the outlet communicates with the air outlet duct (922), so that the two sets of fan assemblies (91) are mutually active and standby. 8. The pod propeller according to claim 6, characterized in that, the fan assembly (91) is provided with two groups, and the inlets of the casings (912) of the two groups of fan assemblies (91) can be respectively communicate with the air inlet ducts (921), the outlets of the casings (912) of the two groups of fan assemblies (91) can communicate with the air outlet ducts (922) respectively, and the two groups of fans Said blowers (911) of the assembly (91) can be turned on simultaneously. 9. The pod thruster according to any one of claims 1-8, wherein the double backup cable further comprises a cooling pipe, and the first cable assembly and the second cable assembly surround the Distribution of cooling pipes. 10. A ship, characterized by comprising the pod propeller according to any one of claims 1-9.

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