CN112441209A - Double-guide-vane bidirectional-inflow shaftless side-pushing device - Google Patents
Double-guide-vane bidirectional-inflow shaftless side-pushing device Download PDFInfo
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- CN112441209A CN112441209A CN202011255902.1A CN202011255902A CN112441209A CN 112441209 A CN112441209 A CN 112441209A CN 202011255902 A CN202011255902 A CN 202011255902A CN 112441209 A CN112441209 A CN 112441209A
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- impeller
- stator
- guide
- vane
- inflow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/16—Propellers having a shrouding ring attached to blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/16—Propellers having a shrouding ring attached to blades
- B63H2001/165—Hubless propellers, e.g. peripherally driven shrouds with blades projecting from the shrouds' inside surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H2023/005—Transmitting power from propulsion power plant to propulsive elements using a drive acting on the periphery of a rotating propulsive element, e.g. on a dented circumferential ring on a propeller, or a propeller acting as rotor of an electric motor
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a double-guide-vane bidirectional inflow shaftless side thrust device which is used for providing side thrust of a ship. The double-guide-vane bidirectional inflow shaftless side thrust device comprises a guide pipe, an integrated motor rotor, an impeller, a left stator and a right stator, wherein the guide pipe is fixedly arranged on a ship body in an extending mode along the width direction of the ship body, the integrated motor rotor is rotatably arranged in the guide pipe, the impeller is integrated with the integrated motor rotor, and the left stator and the right stator are arranged on two sides of the impeller in a centrosymmetric mode. The central symmetry point of the left stator and the right stator is the same as the central symmetry point of the impeller. So set up, two-way influent requirement can be realized satisfying with the right side stator to the side thrust direction's change can be realized through changing impeller direction of rotation, the side stator of influent flow can play even incoming flow and exert the effect of prewhirl for the fluid simultaneously, is favorable to delaying the vacuole emergence, and the noise reduction raises the efficiency, and the side guide vane of effluenting can retrieve the rotational energy that effluences, further raises the efficiency.
Description
Technical Field
The invention relates to the technical field of ship control, in particular to a double-guide-vane bidirectional inflow shaftless side thrust device with high integration, high efficiency and low noise.
Background
With the continuous development of ocean resource development towards deep sea, the ship dynamic positioning system plays an increasingly important role as key equipment and is applied to special ships such as drilling ships, salvage ships and cable laying ships. In order to realize dynamic positioning, a side thruster is usually arranged at the head of the ship, and the side thruster at the head and a main thruster at the tail act together so as to balance environmental force and moment. In addition, the side thruster can be used for improving the maneuverability and the safety of the ship when the ship enters and exits the wharf, the ship entering and exiting the wharf provided with the side thruster does not need to be pulled by a tugboat, and the economic cost of the whole life cycle of the ship can be reduced. In addition to its use for dynamic positioning of vessels, the side thrusters are widely used as manipulators for unmanned underwater vehicles to improve maneuverability of the vehicle at low speeds and positioning capability at zero speed.
The prior ship side-pushing device is mainly designed according to a propeller or a pump. A typical propeller sidewinder configuration includes a propeller as the rotor, a T-pack (gearbox) containing a right angle drive shaft system, and a drive motor. The propeller side thruster changes the direction of lateral thrust through propeller reversal or pitch adjustment, and the propeller changing the thrust direction through reversal has relatively poor pressure distribution on blades and unsatisfactory efficiency and noise performance because the blades are necessarily symmetrical and no guide vane is used for rectification; the pitch-adjusting lateral thrust needs a complex control mechanism for changing the pitch of the blade, has high failure rate and long response time for changing the thrust direction. At present, the two propellers are driven and driven by a gear box which blocks fluid flow and has adverse effect on efficiency.
To obtain a large turning moment, the thrusters are usually arranged in the bow of the vessel. Due to the limited space, the gearbox is usually in the shape of a blunt body and has a small distance to the blades, which results in a strong choking effect and non-uniformity of the incoming flow. Since the blade tip clearance of the side thrusters is small, the flow near the blade tip will act directly on the tube wall, thus causing a larger pulsating pressure than with open paddles. Because the load of the blade tip of the side pushing paddle is heavier than that of the open paddle, and uneven wake flow caused by the gear box is added, cavitation bubbles are easy to occur, and vibration is further increased; the ships using the side thruster are mainly special engineering ships such as drilling ships, salvage ships and cable laying ships, the normal work can be seriously influenced by the excessive vibration, and the fatigue and the discomfort of personnel can be caused.
The existing pump type propeller for the ship is mainly used as a main propeller and used as a power device for providing forward power for the ship, and the existing propeller is in one-way inflow, namely fluid in front of the propeller is sucked and discharged towards the back of the propeller. In order to increase hydrodynamic efficiency as much as possible and avoid cavitation, the configuration of such propeller blades must not be symmetrical (symmetrical blade pressure distribution is relatively imperfect) and therefore cannot be reversed to provide a counter force, or can only be reversed to operate under special conditions to provide a small counter force with very low efficiency.
European patent "Shaftless Propeller" published as EP1739007a1, chinese patent "marine permanent magnet motor Propeller" published as CN104326073A, and chinese patent "underwater hollow hub-less Propeller" published as CN101546939A are both single-rotor hub-less rim-driven propellers, in which a motor stator is disposed in a cylindrical housing, Propeller blades are connected with a motor rotor and then mounted in a hollow portion of the housing, and the rotor drives the blades to rotate to generate thrust after the motor is powered on. The propellers in the patent are 'shaftless propellers' which are all used for generating forward thrust, overcoming the resistance in the navigation of the ship and being incapable of generating transverse force.
The existing pump side thrust can not realize bidirectional side thrust, so that two side thrusts are required to be arranged to respectively provide side thrusts in two directions. In view of the above, a dual guide vane bidirectional inflow shaftless lateral thrust device is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a double-guide-vane bidirectional inflow shaftless side thrust device which is high in efficiency, low in noise, anti-cavitation and compact in structure.
In order to achieve the purpose, the invention provides a double-guide-vane bidirectional inflow shaftless side thrust device which is used for providing lateral thrust for a ship and comprises a guide pipe, an integrated motor rotor, an impeller, a left stator and a right stator, wherein the guide pipe extends and is fixedly arranged on a ship body along the width direction of the ship body, the integrated motor rotor is rotatably arranged in the guide pipe, the impeller is integrated with the integrated motor rotor, and the left stator and the right stator are arranged on two sides of the impeller in a centrosymmetric manner; the left stator and the right stator are fixedly arranged on the inner wall of the guide pipe, and the central symmetry point of the left stator and the right stator is the same as the central symmetry point of the impeller.
As a further improvement of the invention, the double-guide-vane bidirectional inflow shaftless side thrust device is arranged at the head part of the ship body and integrally penetrates through the port and the starboard of the ship body; when the ship needs to push left, the impeller rotates positively, water flow enters from a port, the left stator prerotates inflow, the right stator rectifies outflow and then sprays the outflow through a starboard, and the impeller cavitation and the starboard play roles in improving the propulsion efficiency, inhibiting the impeller cavitation and reducing noise; when boats and ships need thrust right, the impeller reversal, rivers get into from the starboard, the right side stator carries out prewhirl to the inflow, the left side stator is through the port blowout after going out the rectification to the outflow, produces thrust right.
As a further improvement of the present invention, the double-vane bidirectional inflow shaftless side thrust device further includes a hub disposed in the conduit, the extending direction of the hub is the same as the extending direction of the conduit, and the hub is fixedly connected with the left side stator and the right side stator.
As a further improvement of the invention, the inner peripheral wall of the conduit is provided with a bearing for transmitting the thrust generated by the impeller and fixing the radial and axial positions of the impeller.
As a further improvement of the invention, the hub is provided with a bearing for transmitting the thrust generated by the impeller and fixing the radial and axial positions of the impeller.
As a further improvement of the present invention, the inner wall of the conduit is provided with an annular groove for accommodating the integrated motor rotor, and the impeller is mounted on the inner peripheral wall of the integrated motor rotor and rotates along with the rotation of the integrated motor rotor.
The invention has the beneficial effects that:
1. compared with the existing pumps, the double-guide-vane bidirectional inflow shaftless side pushing device can realize the work of providing bidirectional thrust which is completed by two side pushing before one side pushing is realized, and saves the arrangement space of devices on a ship; compare in the screw side that changes thrust direction through the screw reversal and push away, this patent can raise the efficiency through setting up the stator, avoids the cavitation, reduces the noise.
2. The double-guide-vane bidirectional inflow shaftless side thrust device cancels transmission mechanisms such as a shafting and the like, improves the energy transmission efficiency, and eliminates vibration and noise generated by the rotation of the shafting; the traditional side-pushing gear box is omitted, the uniformity of a flow field can be improved, and meanwhile, the problem of pressure pulsation enhancement caused by small blade tip clearance of the propeller is solved by the design without a hub, and noise reduction is facilitated. In addition, in order to realize bidirectional thrust, the traditional side thruster needs to arrange at least two side thrusting devices on two sides of a ship body to provide bidirectional thrust, and realizes reverse rotation through a mechanical structure or adjusts the screw pitch of a propeller, and the two modes both need longer response time.
3. The double-guide-vane bidirectional inflow shaftless side thrust device is characterized in that a left stator and a right stator which are in a central symmetrical structure are symmetrically arranged on two sides of an impeller, and the central symmetrical point of the left stator and the right stator is the same point as the central symmetrical point of the impeller; namely, the left stator, the right stator and the impeller are centrosymmetric about the central point of the double-guide-vane bidirectional inflow shaftless side thrust device; by the arrangement, the left stator and the right stator can meet the requirement of bidirectional inflow, and the change of the direction of the lateral thrust can be realized by changing the rotation direction of the impeller; when the propeller works, the inflow side guide vanes (inflow side stators) can play a role in uniform inflow and pre-rotation of fluid, so that the inflow field of the rotor is more uniform, cavitation can be delayed, pulsating force of the rotor is reduced, line spectrum radiation noise of the propeller is reduced, efficiency is improved, and the outflow side guide vanes (outflow side stators) can recover outflow rotation energy, so that efficiency is further improved.
Drawings
Fig. 1 is a schematic structural diagram of an angle of the double guide vane bidirectional inflow shaftless side thrust device of the present invention.
Fig. 2 is a schematic horizontal cross-sectional structure view of the double guide vane bidirectional inflow shaftless side thrust device of the present invention.
Fig. 3 is a schematic cross-sectional view of the hub of fig. 1 taken along a central axis thereof.
Reference numerals
1, a ship body; 2-a catheter; 3-left stator; 4-right stator; 5-a hub; 6-an integrated motor rotor; 7-an impeller; 8-bearing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it is also to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 3, the present invention provides a dual-guide vane bidirectional inflow shaftless lateral thrust device for providing a lateral thrust for a ship to achieve dynamic positioning and improve ship maneuverability. The double-guide-vane bidirectional inflow shaftless side thrust device is arranged at the head part of the ship body 1 and integrally penetrates through the port and starboard of the ship body 1; the ship comprises a guide pipe 2 which extends and is fixedly arranged on a ship body 1 along the width direction of the ship body 1, an integrated motor rotor 6 which is rotatably arranged in the guide pipe 2, an impeller 7 which is integrated with the integrated motor rotor 6, and a left stator 3 and a right stator 4 which are arranged on two sides of the impeller 7 in a centrosymmetric manner; the left stator 3 and the right stator 4 are fixedly arranged on the inner wall of the guide pipe 2, and the central symmetrical point of the left stator 3 and the right stator 4 is the same as the central symmetrical point of the impeller 7.
Namely, the left stator 3, the right stator 4 and the impeller 7 are centrosymmetric with respect to the center point of the double-guide-vane bidirectional inflow shaftless side thrust device. By the arrangement, the left stator 3 and the right stator 4 can meet the requirement of bidirectional inflow, and the direction of the lateral thrust can be changed by changing the rotation direction of the impeller 7; when the propeller works, the inflow side guide vanes (inflow side stators) can play a role in uniform inflow and pre-rotation of fluid, so that the inflow field of the rotor is more uniform, cavitation can be delayed, pulsating force of the rotor is reduced, line spectrum radiation noise of the propeller is reduced, efficiency is improved, and the outflow side guide vanes (outflow side stators) can recover outflow rotation energy, so that efficiency is further improved.
In one embodiment, the double-guide-vane bidirectional inflow shaftless lateral pushing device is of a hubless structure, the guide pipe 2 is arranged in a hollow cylinder shape, an annular groove (not shown) formed along the radial direction of the guide pipe 2 is arranged on the inner peripheral wall of the guide pipe 2 and used for accommodating the integrated motor rotor 6, a plurality of impeller blades are uniformly and symmetrically arranged on the inner peripheral wall of the integrated motor rotor 6, one ends of the impeller blades are fixed on the inner peripheral wall of the integrated motor rotor 6, and the other ends of the impeller blades are free ends; the integrated motor rotor 6 is rotatable within the annular recess and directly drives the impeller 7 in rotation. So set up, cancelled shafting and gear among the traditional side thrust unit, can eliminate the hull radiation noise that rotatory shafting and gear vibration arouse, be favorable to realizing the low noise, also reduced the hull space that the side thrust took.
A bearing is arranged on the inner peripheral wall of the conduit 2; for transmitting the thrust generated by the impeller 7 and for fixing the radial position of the impeller 7.
In another embodiment, a hub structure is arranged in the double-guide-vane bidirectional inflow shaftless side thrust device. The hub 5 is arranged in the guide tube 2 and extends in the same direction as the guide tube 2. In this embodiment, one end of the left stator 3 and one end of the right stator 4 are fixedly connected to the inner wall of the duct 2, and the other end are fixedly connected to the hub 5. The hub 5 is provided with bearings 8 for transmitting thrust generated by the impeller 7 and for fixing the radial position of the impeller 7, as shown in fig. 3.
The working principle of the double guide vane bidirectional inflow shaftless side thrust device of the invention is explained as follows:
when the ship needs to push left, the impeller 7 rotates forwards, water flow enters the double guide vane bidirectional inflow shaftless side thrust device from a port, the left stator 3 prerotates inflow, the right stator 4 rectifies outflow and then sprays the outflow through a starboard, and the left stator and the right stator play roles in improving the propulsion efficiency, inhibiting the cavitation of the impeller 7 and reducing noise; when the ship needs right thrust, the impeller 7 rotates reversely, water flow enters from a starboard, the right stator 4 prerotates the inflow, and the left stator 3 rectifies the outflow and then ejects the outflow from the port.
The CFD numerical simulation calculation is carried out on the preliminary design scheme of the double-guide-vane bidirectional inflow shaftless side thrust device, the device can provide 20kN side thrust under 70kW shaft power, the efficiency is high, the flow state is ideal under the design working condition, no obvious flow separation exists, and no cavitation phenomenon occurs.
In summary, in the dual-guide-vane bidirectional inflow shaftless lateral thrust device, the left stator 3 and the right stator 4 which are in a centrosymmetric structure are symmetrically arranged on two sides of the impeller 7, and the centrosymmetric point of the left stator 3 and the right stator 4 is the same point as the centrosymmetric point of the impeller 7; namely, the left stator 3, the right stator 4 and the impeller 7 are centrosymmetric with respect to the center point of the double-guide-vane bidirectional inflow shaftless side thrust device. With the arrangement, on one hand, the left stator 3 and the right stator 4 can meet the requirement of bidirectional inflow, and the change of the direction of the lateral thrust can be realized by changing the rotation direction of the impeller 7; on the other hand, the side thrust device is provided with a left guide vane and a right guide vane, and the left guide vane and the right guide vane can be respectively used as a front guide vane and a rear guide vane no matter the integrated motor rotor 6 rotates forwards or reversely; when the propeller works, the propeller can play a role in homogenizing incoming flow and applying prerotation to fluid, so that the rotor flow inlet field is more uniform, and the generation of blade tip vortex cavitation bubbles and blade cavitation bubbles is delayed, thereby reducing the pulsating force of the rotor, reducing the line spectrum radiation noise of the propeller and improving the efficiency; the rear guide vane can recover the rotational energy of the flow, and the efficiency is further improved. Compared with the existing pump side pushing, the double-guide-vane bidirectional inflow shaftless side pushing device can realize the work of providing bidirectional thrust which needs two side pushing before realizing one side pushing, and saves the arrangement space of devices on a ship; compared with propeller side thrust which changes the thrust direction through propeller reversal, the double-guide-vane bidirectional inflow shaftless side thrust device can improve the efficiency through the guide vanes, avoid cavitation and reduce noise.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a two-way influent shaftless side thrust unit of two vanes for provide boats and ships lateral thrust, its characterized in that: the double-guide-vane bidirectional inflow shaftless side thrust device comprises a guide pipe, an integrated motor rotor, an impeller and a left stator and a right stator, wherein the guide pipe extends and is fixedly arranged on a ship body along the width direction of the ship body, the integrated motor rotor is rotatably arranged in the guide pipe, the impeller is integrated with the integrated motor rotor, and the left stator and the right stator are arranged on two sides of the impeller in a central symmetry manner; the left stator and the right stator are fixedly arranged on the inner wall of the guide pipe, and the central symmetry point of the left stator and the right stator is the same as the central symmetry point of the impeller.
2. The double-guide-vane bidirectional inflow shaftless side thrust device of claim 1, wherein: the double-guide-vane bidirectional inflow shaftless side thrust device is arranged at the head part of the ship body and integrally penetrates through a port and a starboard of the ship body; when the ship needs to push left, the impeller rotates positively, water flow enters from a port, the left stator prerotates inflow, the right stator rectifies outflow and then sprays the outflow through a starboard, and the impeller cavitation and the starboard play roles in improving the propulsion efficiency, inhibiting the impeller cavitation and reducing noise; when boats and ships need thrust right, the impeller reversal, rivers get into from the starboard, the right side stator carries out prewhirl to the inflow, the left side stator is through the port blowout after going out the rectification to the outflow, produces thrust right.
3. The double-guide-vane bidirectional inflow shaftless side thrust device of claim 1, wherein: the double-guide-vane bidirectional inflow shaftless side pushing device further comprises a hub arranged in the guide pipe, the extending direction of the hub is the same as that of the guide pipe, and the hub is fixedly connected with the left stator and the right stator.
4. The double-guide-vane bidirectional inflow shaftless side thrust device of claim 1, wherein: and the inner peripheral wall of the guide pipe is provided with a bearing for transmitting the thrust generated by the impeller and fixing the radial and axial positions of the impeller.
5. The double-guide-vane bidirectional inflow shaftless side thrust device of claim 3, wherein: the hub is provided with a bearing for transmitting thrust generated by the impeller and fixing the radial and axial positions of the impeller.
6. The double-guide-vane bidirectional inflow shaftless side thrust device of claim 1, wherein: the inner wall of the conduit is provided with an annular groove for accommodating the integrated motor rotor, and the impeller is arranged on the inner peripheral wall of the integrated motor rotor and rotates along with the rotation of the integrated motor rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011255902.1A CN112441209A (en) | 2020-11-11 | 2020-11-11 | Double-guide-vane bidirectional-inflow shaftless side-pushing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011255902.1A CN112441209A (en) | 2020-11-11 | 2020-11-11 | Double-guide-vane bidirectional-inflow shaftless side-pushing device |
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| Publication Number | Publication Date |
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| CN112441209A true CN112441209A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011255902.1A Pending CN112441209A (en) | 2020-11-11 | 2020-11-11 | Double-guide-vane bidirectional-inflow shaftless side-pushing device |
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| CN (1) | CN112441209A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114348225A (en) * | 2021-12-22 | 2022-04-15 | 中国人民解放军海军工程大学 | Vibration-damping noise-reducing shaftless side-pushing device and runner system |
| NL2030800B1 (en) * | 2022-02-01 | 2023-08-11 | Hydromaster Holding B V | Low noise tunnel thruster |
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| CN102941919A (en) * | 2012-12-06 | 2013-02-27 | 王军辉 | Front steering type ship |
| CN105129060A (en) * | 2015-09-01 | 2015-12-09 | 武汉理工大学 | Integrated water lubrication bearing for thruster with hub flange |
| CN110697014A (en) * | 2019-08-27 | 2020-01-17 | 中国人民解放军海军工程大学 | Shaftless pump jet vector propulsion device |
| CN111094125A (en) * | 2017-06-29 | 2020-05-01 | Cnim集团 | Propeller pump type hydraulic propulsion device and ship equipped with such a device |
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2020
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| FR2927605A1 (en) * | 2008-02-14 | 2009-08-21 | Dcns Sa | HYDRAULIC PROPELLER WITH IMPROVED PERIPHERAL ROTOR. |
| CN102803063A (en) * | 2009-06-25 | 2012-11-28 | 川崎重工业株式会社 | Thrust generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114348225A (en) * | 2021-12-22 | 2022-04-15 | 中国人民解放军海军工程大学 | Vibration-damping noise-reducing shaftless side-pushing device and runner system |
| NL2030800B1 (en) * | 2022-02-01 | 2023-08-11 | Hydromaster Holding B V | Low noise tunnel thruster |
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Application publication date: 20210305 |