CN108622358B - Ducted propeller protection device - Google Patents
Ducted propeller protection device Download PDFInfo
- Publication number
- CN108622358B CN108622358B CN201810660680.8A CN201810660680A CN108622358B CN 108622358 B CN108622358 B CN 108622358B CN 201810660680 A CN201810660680 A CN 201810660680A CN 108622358 B CN108622358 B CN 108622358B
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- CN
- China
- Prior art keywords
- propeller
- protective cover
- type protective
- guide pipe
- elastic steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
- B63H5/165—Propeller guards, line cutters or other means for protecting propellers or rudders
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Transmission Devices (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a ducted propeller protection device. The water pumping device comprises a conduit type protective cover, a sealing device and a water pumping device, wherein the protective cover is supported and installed at the stern by a support and covers the periphery of a propeller, the conduit type protective cover and the support are of communicated cavity structures, a set of sealing device is respectively arranged at the inlet end and the outlet end of the conduit type protective cover, each set of sealing device comprises a motor, a transmission shaft, a rack, a circular ring, an elastic steel belt and a sealing plate, and the water pumping device comprises a water storage tank installed in the stern, a water pump and a water pumping pipe located in the cavity structures. The guide pipe type propeller protection device keeps the propeller in a vacuum environment when the ship stops sailing, reduces the contact time of the propeller and seawater, greatly reduces the erosion of the propeller, can well protect the propeller, and has good application prospect.
Description
Technical Field
The invention relates to a propeller protection device, in particular to a ship propeller protection device.
Background
The marine propeller is immersed in seawater and is very vulnerable to seawater erosion. The service life of the propeller is greatly shortened through the erosion of seawater which lasts for a long time, and the performance of the propeller is reduced due to the serious erosion. The ship is in a state of being stopped in navigation for a long time in the service life of the ship, and at the moment, the propeller does not work and is only soaked in water, so that the propeller is a key stage for being corroded by seawater.
Disclosure of Invention
The invention aims to provide a ducted propeller protection device which can reduce erosion of seawater to a propeller, can homogenize wake flow behind a ship and improve propeller efficiency.
The purpose of the invention is realized by the following steps:
the water pumping device comprises a duct type protective cover, a sealing device and a water pumping device, wherein the duct type protective cover is supported and installed at the stern by a support and covers the periphery of a propeller, the duct type protective cover and the support are of a communicated cavity structure, a set of sealing device is respectively arranged at an inlet end and an outlet end of the duct type protective cover, each set of sealing device comprises a motor, a transmission shaft, a rack, a circular ring, an elastic steel belt and a sealing plate, the motor is installed in the stern, the transmission shaft, the rack, the circular ring and the elastic steel belt are arranged in the cavity structure, the upper end of the transmission shaft is connected with the motor, the lower end of the transmission shaft is provided with a gear, the rack is meshed with the gear, the circular ring is fixed at the end part of the rack, 4-8 sealing plates are installed at a port of the duct type protective cover through rotating shafts, one end of one elastic steel belt is connected with each sealing plate, the other end of each elastic steel belt is connected to the circular ring, the sealing plate at the inlet end of the duct type protective cover is provided with a circular notch matched with the propeller shaft, and the water pumping device comprises a water storage tank, a water pumping machine and a water pumping pipe which are installed in the cavity structure.
The present invention may further comprise:
the closing plate has 8 triangular pieces.
The invention provides a ducted propeller protection device which mainly comprises a ducted protection cover, a sealing device and a water pumping device. A guide pipe type protective cover is added around the propeller, the protective cover is supported at the stern by a support, and the support and the protective cover comprise a sealing device and a water pumping device. When the ship stops sailing, the closing plate is closed to enable the propeller to be in a sealed environment, and then the water pumping device pumps away all water in the guide pipe to enable the propeller to be in a vacuum environment. When the ship sails, the closing plate is opened, and the propeller works normally. The protection device can not only greatly reduce the erosion of seawater to the propeller, but also make the wake flow behind the ship more uniform. The opening and closing of the closing plate of the protective device and the water pumping of the suction pipe are determined by whether the ship sails or not.
The ducted propeller protection device of the invention has the advantages that the ducted protection cover surrounds the propeller and is supported at the stern by the bracket; water pumping pipes are arranged in the bracket and the guide pipe, and the water pumping pipes suck water into the water storage tank and then discharge the water; a closure device is disposed in the stent and the catheter. The sealing device consists of a motor, a transmission shaft, a circular ring, a flexible steel belt, a rotating shaft and a sealing plate; the closing plate on the duct is octagonal, each triangle is provided, and the closing plate is a circular cut due to the existence of a paddle shaft at the inlet. The sealing plate is parallel to the guide pipe when the flexible steel belt is stretched, and the sealing plate seals the opening of the guide pipe when the flexible steel belt is contracted; the motion track of the circular ring is an annular track clinging to the circular ring. The circular ring can keep moving back and forth vertically.
The control principle of the ducted propeller protection device of the present invention is as follows:
the conduit type protective cover 4 is a double-layer hollow structure. The water tank 5, the water pump 15 and the motor 6 of the ducted propeller protection are located at the stern 1. After the ship stops sailing, the switch of the motor 6 is turned on to drive the transmission shaft 7 to rotate, the gear 8 drives the rack 9 to move towards the guide pipe opening, and the rack 9 pushes the circular ring 10 to move towards the opening of the guide pipe type protection cover 4. The ring 10 drives the eight elastic steel belts 11 to contract, drives the closing plates 13 to rotate around the rotating shaft 12, and the eight closing plates 13 completely close the front and rear openings of the conduit type protective cover 4. At this point the pump 15 starts to completely pump the water in the ducted protective cover 4 through the suction pipe 14 into the tank 5, and then closes the suction pipe.
After the ship starts sailing. The switch of the motor 6 is turned on to drive the transmission shaft 7 to rotate reversely, the gear 8 drives the rack 9 to move reversely, and the rack 9 pulls the circular ring 10 to move towards the inside of the guide pipe type protection cover 4. The ring 10 drives the eight elastic steel belts 11 to extend, the elastic steel belts 11 drive the closing plates 13 to rotate around the rotating shaft 12, and the eight closing plates 12 recover to be parallel to the conduit type protective cover.
The guide pipe type propeller protection device keeps the propeller in a vacuum environment when the ship stops sailing, reduces the contact time of the propeller and seawater, greatly reduces the erosion of the propeller, can well protect the propeller, and has good application prospect.
Drawings
FIG. 1 is a schematic longitudinal cross-sectional view of a ducted propeller protection arrangement;
FIG. 2 is a schematic top view of the closure at the inlet;
FIG. 3 is a schematic front view of the ducted propeller protection arrangement;
fig. 4 is a rear view of the ducted propeller protector.
Detailed Description
The invention is described in more detail below by way of example.
The invention relates to a guide pipe type propeller protection device which comprises a guide pipe type protection cover, a sealing device and a water pumping device.
1) The closure device is located within the ducted protective cover 4 and the support frame 2. The conduit type protective cover 4 is a double-layer hollow structure, and the support 2 is a hollow structure. After the ship stops sailing, the switch of the motor 6 is turned on to drive the transmission shaft 7 to rotate, the gear 8 drives the rack 9 to move towards the guide pipe opening, and the rack 9 pushes the circular ring 10 to move towards the opening of the guide pipe type protection cover 4. The ring 10 drives the eight elastic steel belts 11 to contract, drives the closing plates 13 to rotate around the rotating shaft 12, and the eight closing plates 13 completely close the front and rear openings of the conduit type protective cover 4. At this point, the pump 15 begins to pump the water in the ducted protective cover 4 completely into the tank 5 via the pump pipe 14, and then closes the pump pipe. At the moment, the propeller is completely in a vacuum environment, so that the erosion of seawater to the propeller is greatly reduced, and the service life of the propeller is prolonged.
2) After the ship starts sailing. The switch of the motor 6 is turned on to drive the transmission shaft 7 to rotate, the gear 8 drives the rack 9 to move reversely, and the rack 9 pulls the circular ring 10 to move towards the inside of the guide pipe type protection cover 4. The ring 10 drives the eight elastic steel belts 11 to extend, the elastic steel belts 11 drive the closing plates 13 to rotate around the rotating shaft 12, and the eight closing plates 12 recover to be parallel to the conduit type protective cover. At the moment, a guide pipe is added outside the propeller, so that the rectification function can be well played, and the efficiency of the propeller is improved.
The propeller is arranged in a vacuum environment when the propeller does not work by the protection device, so that the contact time of the propeller and seawater is greatly reduced, the degradation of the propeller is reduced, the service life of the propeller is prolonged, and the propeller has a good practical application prospect on a surface ship.
Claims (2)
1. The utility model provides a ducted propeller protection device, includes ducted safety cover, closing means and pumping device, characterized by: the guide pipe type protective cover is supported by a support and is arranged at the stern of the ship and covers the periphery of the propeller, the guide pipe type protective cover and the support are of communicated cavity structures, a set of sealing device is arranged at the inlet end and the outlet end of the guide pipe type protective cover respectively, each set of sealing device comprises a motor, a transmission shaft, a rack, a circular ring, an elastic steel belt and a sealing plate, the motor is arranged in the stern of the ship, the transmission shaft, the rack, the circular ring and the elastic steel belt are arranged in the cavity structures, the upper end of the transmission shaft is connected with the motor, the lower end of the transmission shaft is provided with a gear, the rack is meshed with the gear, the circular ring is fixed at the end part of the rack, 4-8 sealing plates are arranged at the port of the guide pipe type protective cover through a rotating shaft, each sealing plate is connected with one end of one elastic steel belt, the other end of each elastic steel belt is connected with the circular ring, the sealing plate at the inlet end of the guide pipe type protective cover is provided with a circular notch matched with the propeller shaft when the elastic steel belt is stretched, and the sealing plate seals the opening when the elastic steel belt is contracted; the water pumping device comprises a water storage tank arranged in the stern, a water pump and a water pumping pipe positioned in the cavity structure.
2. The ducted propeller protection device according to claim 1, wherein: the closing plate has 8, and the closing plate is the triangle-shaped piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810660680.8A CN108622358B (en) | 2018-06-25 | 2018-06-25 | Ducted propeller protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810660680.8A CN108622358B (en) | 2018-06-25 | 2018-06-25 | Ducted propeller protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108622358A CN108622358A (en) | 2018-10-09 |
| CN108622358B true CN108622358B (en) | 2022-10-28 |
Family
ID=63688413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810660680.8A Active CN108622358B (en) | 2018-06-25 | 2018-06-25 | Ducted propeller protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108622358B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5918094A (en) * | 1982-07-21 | 1984-01-30 | Nippon Kokan Kk <Nkk> | Side thruster cover device of ship |
| JPS61171655A (en) * | 1985-01-26 | 1986-08-02 | Takashi Fujiki | Ducted propeller structure improving performance in both water surface and midair transport services in housing submarine propeller of surface-gliding transport and utilizing duct cover |
| JPH0840377A (en) * | 1994-07-29 | 1996-02-13 | Mitsubishi Heavy Ind Ltd | Water jet propulsion device for ship |
| CN102180252A (en) * | 2011-01-10 | 2011-09-14 | 李欣坡 | Environmental protective cover for ship thruster |
| FR3039822B1 (en) * | 2015-08-07 | 2017-09-08 | Dcns | SUBMARINE COMPRISING PROPELLER-TYPE PROPELLER MEANS |
| CN106394844A (en) * | 2016-11-06 | 2017-02-15 | 邹良聪 | Screw propeller protection cover |
| CN206231601U (en) * | 2016-12-02 | 2017-06-09 | 长兴大河造船有限公司 | A kind of propeller for vessels protector |
| CN206327554U (en) * | 2016-12-28 | 2017-07-14 | 上海富勋实业有限公司 | A kind of Lateral thrust unit of ship that capping is pushed away with watertight side |
| CN108016454B (en) * | 2018-01-03 | 2024-03-15 | 冯政尧 | Sealing system for sealing pipeline high-speed train |
-
2018
- 2018-06-25 CN CN201810660680.8A patent/CN108622358B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108622358A (en) | 2018-10-09 |
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