A fully submerged pod fully rotating propeller for a ship

Abstract

The present invention provides a marine fully submerged pod fully rotating thruster, comprising a thruster upper box connected to the hull structure, a thruster motor connected to the bottom of the thruster upper box, a propeller connected to the thruster motor, and a cable slip ring device connected to the top of the thruster upper box; the thruster motor comprises a housing, and a rotor and a stator arranged in the housing; the rotor is horizontally fixed in the housing through a bearing seat, the stator is a shielding structure, and is located between the inner wall of the housing and the rotor; the two ends of the housing are sealed by a front cover and a rear cover respectively; a rotating mechanism is connected to the bottom of the thruster upper box, and the rotating mechanism is connected to the outer side of the housing through a support arm structure. The present invention can solve the problems of complex structure and low efficiency of gear-type thrusters, high cost of pod thrusters, and inability to work due to water ingress.

Description

Technical Field

[0001] The invention relates to a motor-driven propeller, and more specifically to a marine fully submerged pod fully rotating propeller, and is particularly suitable for a propeller driven by an AC asynchronous motor whose rotor is directly immersed in water. Background Art

[0002] Ship propeller refers to the energy converter in the ship propulsion device. It converts the power generated by the engine into the thrust of the ship to overcome the resistance of the ship sailing in the water and drive the ship forward. At present, geared propellers and podded propellers are widely used in the market. When the geared propeller is working, the main engine or motor drives the propeller through the bevel gear device, but the bevel gear is difficult to process, the production cycle is long, and it will reduce the efficiency of the propeller. Podded propellers mostly use electric motors and bearings arranged in a sealed underwater box, and the motor directly drives the propeller to rotate. However, traditional podded propellers have many shortcomings. The DC permanent magnet motor is expensive. Secondly, when the stern shaft seal of the box leaks, the motor will not work if water enters. Summary of the invention

[0003] In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a fully submerged pod fully rotating propeller for ships, which can solve the problems of complex structure and low efficiency of gear-type propellers, high cost of pod propellers, and inability to work when flooded.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A fully submerged pod fully revolving propeller for a ship, connected to a hull structure, comprising an upper propeller box connected to the hull structure, a propeller motor connected to the bottom of the upper propeller box, a propeller connected to the propeller motor, and a cable slip ring device connected to the top of the upper propeller box;

[0006] The propeller motor comprises a housing, and a rotor and a stator arranged in the housing;

[0007] The rotor is fixed in the housing in a horizontal direction through a bearing seat, and the stator is a shielding structure and is located between the inner wall of the housing and the rotor;

[0008] The two ends of the shell are sealed by a front cover and a rear cover respectively;

[0009] A slewing mechanism is connected to the lower part of the upper box of the propeller, and the slewing mechanism is connected to the outer side of the shell through a supporting arm structure.

[0010] The rotor comprises a rotor bracket, a motor drive shaft located at the center of the rotor bracket, a bearing sleeved on the motor drive shaft, the bearing installed in the bearing seat, a special-shaped copper bar is arranged on the outer side of the rotor bracket, and a propeller is connected to the front end of the motor drive shaft.

[0011] The shielding structure is composed of a shell inner wall, a thin-walled tube and a stop ring welded on the shell inner wall to form a sealed cavity. An iron core and a winding are arranged in the sealed cavity, and epoxy resin is also poured in the sealed cavity.

[0012] The special-shaped copper bar is a circular, rectangular or hollow conductor bar.

[0013] The thin-walled tube is made of non-magnetic corrosion-resistant material.

[0014] An insulating sleeve is also provided on the bearing seat.

[0015] A dynamic seal is also provided on the mounting surface between the bearing and the bearing seat.

[0016] The surfaces of the shell, the front cover and the rear cover are all coated with antifouling paint.

[0017] A flow guide pipe is arranged around the propeller, and the flow guide pipe is welded and fixed to the support arm structure and the shell.

[0018] In the above technical scheme, the present invention provides a fully submerged pod fully rotating propeller for a ship, which enables water to flow into the interior of the motor to directly cool the heat-generating parts, greatly improving the cooling capacity of the motor. Compared with traditional motors, it can generate greater power, thereby significantly improving the thrust of the propeller. At the same time, the smaller motor housing can significantly reduce fluid resistance and improve propeller efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the propeller of the present invention;

[0020] Figure 2 is a schematic structural diagram of a propeller motor in the propeller of the present invention;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the stator in the thruster motor;

[0022] Figure 4 yes Figure 2 Schematic diagram of the structure of the rotor in the thruster motor;

[0023] Figure 5 yes Figure 4 Schematic diagram of the cooling water tank on the rotor. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Please combine Figures 1 to 5 As shown, a fully submerged pod fully rotating thruster for a ship provided by the present invention is connected to a hull structure 1, comprising a thruster upper box body 2 connected to the hull structure 1, a thruster motor 3 connected to the bottom of the thruster upper box body 2, a propeller 12 connected to the thruster motor 3, a flow guide duct 18 is arranged around the propeller 12 to increase the efficiency of the propeller 12 and increase the thrust, the flow guide duct 18 is welded and fixed to a support arm structure 17 and a shell 31, and a cable slip ring device 4 is connected to the top of the thruster upper box body 2.

[0026] Preferably, the propeller motor 3 includes a housing 31, and a rotor 32 and a stator 33 disposed in the housing 31;

[0027] Preferably, the rotor 32 is fixed in the housing 31 in a horizontal direction through a bearing seat 5 , and the stator 33 is configured as a shielding structure and is located between the inner wall of the housing 31 and the rotor 32 .

[0028] Preferably, the two ends of the housing 301 are sealed by a front cover 6 and a rear cover 7 respectively.

[0029] Preferably, in order to fully ensure the insulation of the thruster motor 3 in seawater, the shielding structure of the stator 33 is composed of the inner wall of the shell 31, and the thin-walled tube 8 and the stop ring 9 welded to the inner wall of the shell 31, forming an independent sealed cavity, in which an iron core and a winding 10 are arranged, and epoxy resin 11 is also potted in the sealed cavity, and the potting adopts a vacuum pressure potting process.

[0030] Preferably, the thin-walled tube 8 is made of non-magnetic corrosion-resistant material (such as stainless steel).

[0031] Preferably, the rotor 32 includes a rotor bracket 321, a motor drive shaft 322 located at the center of the rotor bracket 321, a bearing 323 is sleeved on the motor drive shaft 322, and the bearing 323 is installed in the corresponding bearing seat 5. A special-shaped copper bar 324 is provided on the outer side of the rotor bracket 321, and the front end of the motor drive shaft 322 is connected to the propeller 12. The rotor 32 is designed as a squirrel cage type, and the conductor is a special-shaped copper bar 324. According to different motor specifications, it is designed as a circular, rectangular or hollow conductor bar to maximize the heat dissipation effect and further improve the motor power.

[0032] Preferably, a heat dissipation tank 19 is designed as required at the rotor support 321 or the iron core and the winding 10 to maximize the heat dissipation capacity and further improve the motor power capacity.

[0033] Preferably, the bearing seat 5 is also covered with an insulating sleeve 13 , a dynamic seal 14 is also provided on the mounting surface between the bearing 323 and the bearing seat 5 , and a bearing cover 15 is also provided on the bearing seat 5 located at the position of the rear cover 7 .

[0034] Preferably, the thruster motor 3 is driven by a frequency converter, and polyimide wrapped wire is selected as the main insulation. The motor is a squirrel cage induction motor, and the rotor 32 does not need insulation treatment and is directly exposed to seawater.

[0035] Preferably, the surfaces of the housing 31, the front cover 6, and the rear cover 7 are coated with antifouling paint, which can prevent the attachment and growth of marine organisms for a long time. The openings on the front cover 6 and the rear cover 7 are provided with filter screens, which can filter most impurities. During operation, the surface temperature of the motor is relatively high, which can effectively inhibit the attachment and growth of marine organisms. At the same time, the flow of water on the surface can also play a good inhibitory role.

[0036] Preferably, a slewing mechanism 16 is connected to the bottom of the upper casing 2 of the propeller, and the slewing mechanism 16 is connected to the outer side of the shell 31 through a support arm structure 17. The slewing motor on the slewing mechanism 16 drives the propeller motor 3 and the propeller 12 to rotate 360° through a gear set.

[0037] Preferably, the rotating part of the cable slip ring device 4 above the thruster upper box 2 is connected to the underwater thruster motor 3 by a cable, and the fixed part is connected to an external cable, and the hull structure 1 supplies power to the underwater thruster motor 3 through the cable slip ring device 4.

[0038] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A fully submerged pod fully revolving propeller for a ship, connected to a hull structure, characterized in that: It includes a thruster upper box body connected to the hull structure, a thruster motor connected to the lower part of the thruster upper box body, a propeller connected to the thruster motor, and a cable slip ring device connected to the upper part of the thruster upper box body; The propeller motor comprises a housing, and a rotor and a stator arranged in the housing; The rotor is fixed in the housing in a horizontal direction through a bearing seat. The stator is a shielding structure and is located between the inner wall of the shell and the rotor; The two ends of the shell are sealed by a front cover and a rear cover respectively; The lower part of the upper box of the propeller is connected with a slewing mechanism, which is connected to the outer side of the shell through a supporting arm structure. The slewing motor on the slewing mechanism drives the propeller motor and the propeller to rotate 360 ​​degrees through a gear set. The rotating part of the cable slip ring device above the upper box of the thruster is connected to the underwater thruster motor by a cable, and the fixed part is connected to an external cable. The hull structure supplies power to the underwater thruster motor through the cable slip ring device. The shielding structure is composed of the inner wall of the shell, a thin-walled tube and a stop ring welded on the inner wall of the shell, forming a sealed cavity, in which an iron core and a winding are arranged, and epoxy resin is also poured in the sealed cavity. The thruster motor is driven by a frequency converter and uses polyimide wrapped wire as the main insulation. The thruster motor is a squirrel cage induction motor. The rotor does not require insulation treatment and is directly exposed to seawater. The rotor comprises a rotor support, a motor drive shaft located at the center of the rotor support, a bearing sleeved on the motor drive shaft, the bearing being installed in the bearing seat, a special-shaped copper bar being arranged on the outer side of the rotor support, and a propeller being connected to the front end of the motor drive shaft. The special-shaped copper bars are round, rectangular or hollow conductor bars. The bearing seat is also provided with an insulating sleeve. A dynamic seal is also provided on the mounting surface between the bearing and the bearing seat. Design heat dissipation grooves in the rotor bracket or the area between the core and the winding.

2. A fully submerged pod azimuth propeller for a ship as claimed in claim 1, characterized in that: The thin-walled tube is made of non-magnetic corrosion-resistant material.

3. A fully submerged pod azimuth propeller for a ship as claimed in claim 1, characterized in that: The surfaces of the shell, the front cover and the rear cover are all coated with antifouling paint.

4. A fully submerged pod azimuth propeller for a ship as claimed in claim 1, characterized in that: A flow guide pipe is arranged around the propeller, and the flow guide pipe is welded and fixed to the support arm structure and the shell.

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