NL2031507B1 - Anti-twisting pump-jet propulsion device and operating method thereof - Google Patents

Anti-twisting pump-jet propulsion device and operating method thereof Download PDF

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Publication number
NL2031507B1
NL2031507B1 NL2031507A NL2031507A NL2031507B1 NL 2031507 B1 NL2031507 B1 NL 2031507B1 NL 2031507 A NL2031507 A NL 2031507A NL 2031507 A NL2031507 A NL 2031507A NL 2031507 B1 NL2031507 B1 NL 2031507B1
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Netherlands
Prior art keywords
impeller
impellers
stator
free
conduit
Prior art date
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NL2031507A
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Dutch (nl)
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NL2031507A (en
Inventor
Liu Hewei
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Fishery Machinery & Instrument Res Inst Cafs
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Publication of NL2031507A publication Critical patent/NL2031507A/en
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Publication of NL2031507B1 publication Critical patent/NL2031507B1/en

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Classifications

    • 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
    • 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
    • B63H1/28—Other means for improving propeller efficiency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/01—Marine propulsion by water jets having means to prevent foreign material from clogging fluid passage way
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • 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
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
    • B63H5/15—Nozzles, e.g. Kort-type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H11/00—Marine propulsion by water jets
    • B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
    • B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
    • B63H11/08—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type
    • B63H2011/081—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps of rotary type with axial flow, i.e. the axis of rotation being parallel to the flow direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system

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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 present invention relates to an anti—twisting pump—jet propulsion device comprising a front free impeller, a front stator, a rotor, a rear stator and a rear free impeller successively from the front to the rear in an axial direction; at least one front electric cutter is fixedly provided at the front part of the front stator; at least one rear electric cutter is fixedly provided at the rear of the rear stator; the front stator, the rotor, the rear stator and the outer fixing sleeve are provided with a tapered conduit; the rear free impeller is located inside the tapered conduit, or the rear free impeller is fixedly connected to a rear conduit.

Description

P1294 /NL
ANTI-TWISTING PUMP-JET PROPULSION DEVICE AND OPERATING METHOD
THEREOF
TECHNICAL FIELD
The present invention relates to a ship propeller, and more particularly, to an anti-twisting pump-jet propulsion device and operating method thereof, which fall within the technical field of ship propulsion.
BACKGROUND ART
When a ship sails in a fishing area or an offshore aquacul- ture area, it is often twisted by ropes or nets, which causes the propeller to stop rotating and requires personnel to launch and repair, which is inconvenient.
A pump-jet propeller is a marine propeller, the outside of which is a conduit, two ends or only one end of the conduit is provided with a stator, and the impeller end of the stator is fix- edly connected to the conduit and cannot rotate, so it is called a stator. The middle of the conduit is a propeller, also called a rotor, and the stator is on the same line as the axis of the ro- tor. Conventional rotors drive the rotor by connecting the stern shaft of the hull to the rotor hub through the center of the front stator, and rotors using electric propulsion are also placed in the conduit without the stern shaft.
A Chinese patent document with a publication date of August 25, 2020 and a publication number of CN 111572744 A, entitled “HY-
DRAULIC SHEARING DEVICE FOR UNDERWATER TWISTING OF MARINE PUMP-JET
PROPELLER” discloses a device for breaking a rope twisted on a propeller of a pump-jet propeller. This solution has the following deficiencies: firstly, the solution relates to passive defense, not an active defense, and only when the propeller is twisted can it react and break. Secondly, there is no solution to the twisting of the rope around the propeller when reversing.
SUMMARY
An object of the present invention is to provide an anti- twisting pump-jet propulsion device and a method for operating the same, which react to prevent the rope from being twisted outside the propeller before the rope approaches the propeller (i.e., ro- tor) in the pump-jet propulsion device. Meanwhile, it is possible to prevent the propeller from being twisted in both forward and reverse states. Hereinafter the rotor refers to a propeller in a pump-jet propulsion device.
The present invention adopts the following technical solu- tions: an anti-twisting pump-jet propulsion device comprising a front free impeller 100, a front stator 210, a rotor 220, a rear stator 230 and a rear free impeller 300 successively from the front to the rear in an axial direction; wherein at least one front electric cutter 400 is fixedly provided at the front of the front stator 210; at least one rear electric cutter 500 is fixedly provided at the rear of the rear stator 230; the front stator 210, the rotor 220, the rear stator 230, and the outer fixed sleeve are provided with a tapered conduit 240; the rear free impeller 300 is located inside the tapered conduit 240, or the rear free impeller 300 is fixedly connected to a rear conduit 340, the rear end of the rear conduit 340 is sheathed outside the tapered conduit 240, and the gap between the rear free impeller 300 and the tapered conduit 240 is smaller than the size of an article which may be twisted; the front free impeller 100 is provided inside the ta- pered conduit 240, or the front free impeller 100 is fixedly con- nected to a front conduit 140, the inner diameter of the front conduit 140 is less than or equal to the outer diameter of the front free impeller 100, and the rear end of the front conduit 140 is sheathed outside the tapered conduit 240, and the gap between the front conduit 140 and the tapered conduit 240 is less than the size of an article which may be twisted.
Preferably, the front impellers 110 of the front free impel- ler 100 are connected to the front impeller hub 120 and are uni- formly distributed radially along the circumference of the front impeller hub 120, the front impeller hub 120 is fixed on the outer ring of the front rolling bearing 130, the inner ring of the front rolling bearing 130 is fixed on the front sleeve 150, and the front sleeve 150 is fixed on the tail shaft sleeve 910 connected to the hull 900 by welding or fastening; the front stator 210 to which the pump-jet propeller 200 belongs is sheathed on the tail shaft sleeve 910, the rotor 220 to which the pump-jet propeller 200 belongs is connected to the tail shaft 220 extending out of the tail shaft sleeve 910, and the tapered conduit 240 is connect- ed to the hull 900 via a support 930; the rear impellers 310 of the rear free impeller 300 are connected to the rear impeller hub 320 and are uniformly distributed in a radial manner along the circumferential direction of the rear impeller hub 320, the rear impeller hub 320 is fixed on the cuter ring of the rear rolling bearing 330, the inner ring of the rear rolling bearing 330 is fixed on the rear sleeve 350, and the rear sleeve 350 is fixed on the shaft of the rear stator 230 by welding or fastening; the front electric cutter 400 with no less than two parts is uniformly fixed at the hub of the front stator 210, and is located in front of the front stator 210, opposite to the front free impeller 100, and the axis of the front electric cutter 400 is parallel to the axis of the tail shaft sleeve 910; no less than two rear electric cutters 500 are uniformly fixed on the shaft of the rear stator 230, and are located behind the rear stator 230 to the rear free impeller 300, and the axis of the rear electric cutters 500 is parallel to the shaft of the rear stator 230.
Furthermore, front conduit inner impellers 141 are uniformly provided in a centripetal manner along the inner circumference of the front conduit 140, and the parts of the front conduit inner impellers 141 and the front impellers 110 located in the conduit 140 not only have the same impeller section, but also have the same impeller twisting direction, but the length of the front con- duit inner impellers 141 does not reach the front impeller hub 120; the rear part of the front conduit 140 can shield the front part of the tapered conduit 240 from the rope flowing inte the gap between the front free impeller 100 and the front stator 210; a rear conduit inner impeller 311 is uniformly provided in a cen- tripetal shape along the inner circumference of the rear conduit
340, wherein the rear conduit inner impeller 311 is not only the same impeller section as the rear impeller 310, but also the im- peller twisting direction of the two is the same, but the length of the rear conduit inner impeller 311 does not reach the rear im- peller hub 320; when the rear conduit 340 is provided, the front part of the rear conduit (340) can shield the rear part of the ta- pered conduit (240) from the rope flowing into the gap between the rear free impeller 300 and the rear stator 230; when the rear con- duit 340 is not provided, the rear free impeller 300 is inside the tapered conduit 240.
Furthermore, the front impeller 110 of the front free impel- ler 100 is divided into a central impeller 111 and an outer impel- ler 112; the diameter of the entire front impeller 110 is 0.95-1.5 times the diameter of the front stator 210; the outer impeller 112 is a marine propeller impeller or a turbine impeller extending naturally from the central impeller 111.
Further, when the front impeller 110 is one-piece: the front conduit 140 is fixedly provided at the outer edge of the front im- peller 110; when the front impeller 110 is split: the front con- duit 140 is provided at the top edge of the central impeller 111, and the outer impeller 112 is uniformly and radially provided along the outer circumference of the front conduit 140, and in this case, the number of impellers of the central impeller 111 and the outer impeller 112 may be the same or may be different; the front conduit 140 is supported by the top edge of the central im- peller 111 it receives.
Still further, when the front conduit 140 is provided, a rear portion of the front conduit 140 can shield a front portion of the tapered conduit 240 to which the pump-jet propeller 200 belongs; when the front conduit 140 is not provided, the front free impel- ler 100 is placed inside the tapered conduit 240 to which the pump-jet propeller 200 belongs, so as to ensure that the rope is prevented from flowing into the gap between the front stator 210 of the front free impeller 100 in the presence/absence of the front conduit 140; the cross-section of the front conduit 140 isa flat surface, or a general machine airfoil cross-section of a ship’ s rotating conduit.
Still further, there is a common number, or no common number, between the number of the central impellers 111 and/or the number of the outer impellers 112 of the front free impeller 100 and the number of the impellers of the rotor 220; the twisting direction 5 of the central impeller 111 and the twisting direction of the im- pellers of the front stator 210 are in the same direction, and both are in a different direction from the twisting direction of the impellers of the rotor 220, so that the central impeller 111 and the front stator 210 jointly enhance the reverse pre-rotation of the forward inflow of the rotor 220; the twisting/setting di- rection of the outer impeller 112 should satisfy the following conditions: in the case where the impeller 112 rotates with the central impeller 111, the direction of the auxiliary thrust gener- ated by the impeller 112 coincides with the direction of the main thrust generated by the rotor 220.
Still further, the diameter of the rear free impeller 300 is 0.9-1.1 times the diameter of the rear stator 230; the impellers 310 of the rear free impeller 300 are integral, and can be either turbine-type impellers or marine propeller-type impellers, and there is a common number or no common number between the number of impellers thereof and the number of impellers of the rotor 220; the twisting direction of the rear impellers 310 of the rear free impeller 300 is in the same direction as the twisting direction of the impellers of the rear stator 230, and both are in the same di- rection as the twisting direction of the impellers of the rotor 220, so that the rear impellers 310 and the rear stator 230 to- gether recover the energy of the water flow behind the rotor 220.
Preferably, the front electric cutter 400 and the rear elec- tric cutter 500 both use a disc impeller; the rolling bearing is made of an engineering plastic having a self-lubricating function.
Preferably, the cable pipe and the lubricating oil pipe are laid along the support 930, the front stator 210, the rear stator 230 and the tail shaft sleeve 210 to the front and rear electric cutters and the front and rear free impellers, so as to supply power to the electric cutters and oil to the rolling bearings.
Further, the cable tube and lubricating oil tube pass through the tapered conduit 240 into the interior of the pump-jet impeller
A method for operating an anti-twisting pump-jet propulsion device; at work: the front conduit 140 and the tapered conduit 240 form a circumferential shield for the rotor 220, so that the rope can only flow from the front part of the front conduit 140 when navigating forward, and only flow from the rear part of the ta- pered conduit 240 to the pump-jet propeller 200 when navigating backward; when the main engine of the ship is running forward, the rotor 220 is driven to rotate, and the rotor 220 rotates to gener- ate a suction effect, so that the water flow flows from front to back, and the front free impeller rotates; or when the main engine of the ship runs backward, the obtained water flow flows from the rear to the front, and when the water flow flows through the rear free impeller, the rear free impeller rotates; the rope flows from the front to the front free impeller 100 when navigating forward, and flows from the rear to the rear free impeller 300 when navi- gating backward; the rope is twisted by the front or rear free im- peller, and gradually slides down to the position near the elec- tric cutter under the action of water flow, so that the rotor 220 cannot be twisted; at this time, the rotor 220 can still rotate to facilitate the navigation of the ship; as the rope is twisted around the front or rear free wheel, the flow streamline and flow rate to the rotor 220 are changed, resulting in the change of speed. From the change in speedometer readings, the driver deter- mines that the free impeller is twisted, and the driver activates the front or rear electric cutters to cut the rope.
The basic principle of the present invention is: a freely ro- tating impeller is used to encounter the line before the propeller and twist the line, preventing the line from flowing towards the propeller, thereby preventing the line from twisting around the propeller before it is cut.
Advantageous effects of the present invention are: 1) by using the free impeller to rotate the rope before the propeller, the twisting of the rotor can be avoided, and when the twisting is broken, there is no need to stop the navigation and the design is clever. 2) The rope twisting can be prevented in both forward and backward sailing. 3) The reverse pre-rotation formed by the front free impeller and the front stator, and the energy recovery formed by the rear free impeller and the rear stator all contribute to improve the working efficiency of the propeller. 4) The design of the front and tapered conduits effectively prevents the rope from flowing into the gap between the free im- peller and the stator. 5) Since the circumference of the impeller hub is smaller, it is difficult to arrange more impellers, while the circumference of the conduit is longer, so that more impellers can be provided, so that the provision of a short central impeller is advantageous for a proper encryption gap and for twisting the rope.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view of the general arrangement of the anti-twisting pump-jet propulsion device of the present invention, including two structural forms of (a) and (b).
FIG. 2 is a schematic view of a combination of a pump-jet im- peller and front and rear free impellers.
FIG. 3 is a sectional view of a front free impeller in Embod- iment 1.
FIG. 4 is a schematic cross-sectional view of a front free impeller in Embodiment 2.
FIG. 5 is a schematic cross-sectional view of the rear free impeller mounted on the shaft of the rear stator.
In the drawings, 900. Hull, 910. Stern shaft sleeve, 920.
Stern shaft, 930. Support, 100. Front free impeller, 110. Front impeller, 111. Central impeller, 112. Outer impeller, 120. Front free impeller hub, 130. Front free impeller rolling bearing, 140.
Front conduit, 141. Front conduit inner impeller, 150. Front sleeve, 200. Pump-jet propeller, 210. Front stator, 220. Rotor, 230. Rear stator, 240. Tapered conduit, 300. Rear free impeller, 310. Rear impeller, 311. Rear conduit internal impellers, 320.
Rear free impeller hub, 330. Rear free impeller rolling bearing, 340. Rear free impeller conduit, 400. Front electric cutter, 500.
Rear electric cutter.
DETAILED DESCRIPTION OF THE EMBODIMENTS
The invention is further illustrated by the following figures and examples.
Embodiment 1:
With reference to FIG. 1, an anti-twisting pump-jet propul- sion device comprises, from the front to the rear, a front free impeller 100, a pump-jet propeller 200, a rear free impeller 300, a front electric cutter 400 and a rear electric cutter 500 succes- sively; with reference to Figs. 1-5, the front impellers 110 of the front free impeller 100 are connected to the front impeller hub 120 and are uniformly distributed radially along the circumference of the front impeller hub 120, the front impeller hub 120 is fixed on the outer ring of the rolling bearing 130, the inner ring of the rolling bearing 130 is fixed on the sleeve 150, and the sleeve 150 can be fixed on the tail shaft sleeve 910 connected to the hull 900 by welding or fastening; the front stator 210 to which the pump-jet propeller 200 belongs is sheathed on the tail shaft sleeve 910, the rotor 220 to which the pump-jet propeller 200 be- longs is connected to the tail shaft 920 extending out of the tail shaft sleeve 910, and the tapered conduit 240 is connected to the hull 900 via a support 930; the impellers 310 of the rear free im- peller 300 are connected to the rear impeller hub 320 and are uni- formly distributed in a radial manner along the circumferential direction of the rear impeller hub 320, the rear impeller hub 320 is fixed on the outer ring of the rolling bearing 330, the inner ring of the rolling bearing 330 is fixed on the sleeve 350, and the sleeve 350 can be fixed on the shaft of the rear stator 230 by welding or fastening; a front electric cutter 400 with no less than two parts is uniformly fixed at the hub of the front stator 210, and is located in front of the front stator 210, opposite to the front free impeller 100, and the axis of the electric cutter 400 is parallel to the axis of the tail shaft sleeve 910; no less than two rear electric cutters 500 are uniformly fixed on the shaft of the rear stator 230, and are located behind the rear sta- tor 230 opposite to the rear free impeller 300, and the axis of the electric cutters 500 is parallel to the shaft of the rear sta-
tor 230.
In this embodiment, referring to FIG. 3, the front impeller 110 of the front free impeller 100 is divided into two parts, a central impeller 111 and an outer impeller 112, the two parts are integral, and the diameter of the entire front impeller 110 is 0.95-1.5 times the diameter of the front stator 210; the central impeller 111 is a turbine type impeller, and the diameter of the impeller is 0.95-1.2 times the diameter of the front stator 210; the outer impeller 112 may be a marine propeller type impeller or a turbine type impeller which is a natural extension of the cen- tral impeller 111, a front conduit 140 is provided at the outer edge of the front impeller 110;
In this embodiment, the front conduit inner impeller 141 is uniformly and radially provided along the inner circumference of the front conduit 140, and the part of the front conduit inner im- peller 141 and the front impeller 110 located in the conduit 140 not only has the same impeller section, but also has the same im- peller twisting direction, but the length of the front conduit in- ner impeller 141 does not reach the front impeller hub 120; the rear part of the front conduit 140 can shield the front part of the tapered conduit 240 from the rope flowing into the gap between the front free impeller 100 and the front stator 210; a rear con- duit inner impeller 311 is uniformly and radially provided along the inner circumference of the rear conduit 340, wherein the rear conduit inner impeller 311 is not only the same impeller section as the rear impeller 310, but also the impeller twisting direction of the two is the same, but the length of the rear conduit inner impeller 311 does not reach the rear impeller hub 320; the front of the rear conduit 340 can shield the rear of the tapered conduit 240 from the rope flowing in the gap between the rear free impel- ler 300 and the rear stator 230.
In this embodiment, referring to FIG. 1, when the front con- duit 140 is provided, the rear part of the front conduit 140 can shield the front part of the tapered conduit 240 to which the pump-jet propeller 200 belongs, and when the front conduit 140 is not provided {the figure is not illustrated), the free impeller 100 can be placed inside the tapered conduit 240 to which the pump-jet propeller 200 belongs, so as to ensure that the rope is prevented from flowing into the gap between the front free impel- ler 100 and the front stator 210 with/without the front conduit 140; the cross-section of the front conduit 140 may be a flat sur- face, or may be a general-purpose airfoil cross-section of a ship’s rotating conduit.
In this embodiment, the number of the central impellers 111 and/or the number of the outer impellers 112 of the front free im- peller 100 may or may not have a common number with the number of the impellers of the rotor 220; the direction of torsion of the central impeller 111 and the direction of torsion of the impellers of the front stator 210 are in the same direction (i.e., the ten- dency of torsion is consistent, but the angles of respective tor- sions may be the same or may be different, and hereinafter “in the same direction” has the same meaning), and the direction of tor- sion of the impellers of the rotor 220 is in the opposite direc- tion (i.e., the tendency of torsion is opposite, but the absolute values of the angles of respective torsions may be the same or may be different, and hereinafter “in the opposite direction” has the same meaning), so that the central impeller 111 and the front sta- tor 210 jointly enhance the reverse pre-rotation of the forward inflow of the rotor 220; the twisting/setting direction of the outer impeller 112 should satisfy the following conditions: in the case where the impeller 112 rotates with the aforementioned impel- ler 111, the direction of the auxiliary thrust generated by the impeller 112 coincides with the direction of the main thrust gen- erated by the rotor 220.
In this embodiment, referring to FIG. 5, the diameter of the rear free impeller 300 is 0.9-1.1 times the diameter of the rear stator 230; the impellers 310 of the rear free impeller 300 are integral, and can be either turbine-type impellers or marine pro- peller-type impellers, and the number of the impellers thereof can have a common number with or without the number of the impellers of the rotor 220; the twisting direction of the impellers 310 of the rear free impeller 300 is in the same direction as the twist- ing direction of the impellers of the rear stator 230, and both are in the same direction as the twisting direction of the impel-
lers of the rotor 220, so that the impellers 310 and the rear sta- tor 320 together recover the energy of the water flow behind the rotor 220; preferably, the trailing free impeller 300 is inside the tapered conduit 240.
In this embodiment, referring to FIG. 1, the front and rear electric cutters are each provided with a disc impeller.
In this embodiment, the rolling bearing is preferably made of an engineering plastic having a self-lubricating function.
In this embodiment, a cable pipe and a lubricating oil pipe may be applied to the front and rear electric cutters and the front and rear free impellers along a fixed structural member such as a support 930, a front stator 210, a rear stator 230, a tail shaft sleeve 910, etc. to supply power to the electric cutters and oil to the rolling bearings, and the cable pipe and the lubricat- ing oil pipe may pass through the tapered conduit 240 into the in- terior of the pump-jet propeller 200, if necessary.
The basic principle on which this anti-twisting pump-jet pro- pulsion device is based is: a freely rotating impeller is used to encounter the line before the propeller and twist the line, pre- venting the line from flowing towards the propeller, thereby pre- venting the line from twisting around the propeller before it is cut.
At work: first, the front conduit 140 and the tapered conduit 240 form a circumferential shield for the rotor 220 so that the rope can only flow to the propeller from the front (when navi- gating forward) and back (when navigating backward) of the con- duit, which first ensures that the rope cannot flow into the pro- peller from other directions, reducing the probability that the rope will wrap around the rotor 220.
Secondly, when the main engine of the ship is running, the rotor 220 is driven to rotate, and the rotor 220 rotates to gener- ate a suction effect, so that the water flow flows from front to rear (when navigating forward) or from rear to front (when navi- gating backward}, and when the water flow flows through the front and rear free impellers, the front and rear free impellers rotate.
The rope flows from the front to the front free impeller 100 when navigating forward, and flows from the rear to the rear free im-
peller 300 when navigating backward. The rope is twisted by the free impeller and gradually slides down near the electric cutter under the action of the water current, so that it cannot twist the rotor 220. The rotor 220 may still rotate to propel the ship. As the rope wraps around the free wheel, the flow streamline and flow to the rotor 220 changes, resulting in a change in speed. From the change in speedometer readings, the driver can determine that the free impeller is twisted, and the driver can activate the electric cutter in the cab to cut the rope.
Inoperative: turn off the power knife.
Embodiment 2:
This embodiment differs from Embodiment 1 in that: referring to FIG. 4, the front impeller 110 of the front free impeller 100 is divided into a central impeller 111 and an outer impeller 112, and in this case, a front conduit 140 is provided at the top edge of the central impeller 111, and then the outer im- peller 112 is uniformly and radially provided along the outer cir- cumference of the front conduit 140; and the number of impellers of the central impeller 111 and the outer impeller 112 may be the same or different, and the front conduit 140 is supported by the top edge of the impeller accommodated thereby.
With continued reference to FIG. 4, the front conduit inner impellers 141 are uniformly and radially provided along the inner circumference of the front conduit 140, the parts of the front conduit inner impellers 141 and the front impellers 110 located in the front conduit 140 not only have the same impeller section, but also have the same impeller twisting direction, but the length of the front conduit inner impellers 141 does not reach the front im- peller hub 120; the rear part of the front conduit 140 can shield the front part of the tapered conduit 240 from the rope flowing into the gap between the front free impeller 100 and the front stator 210; with reference to FIG. 5, the rear conduit inner impeller 311 is uniformly and radially provided along the inner circumference of the rear conduit 340, and the rear conduit inner impeller 311 is not only the same impeller section as the rear impeller 310, but also the impeller twisting direction of the two is the same,
but the length of the rear conduit inner impeller 311 does not reach the rear impeller hub 320; the rear of the rear conduit 340 can shield the rear of the tapered conduit 240 from the rope flow- ing in the gap between the rear free impeller 300 and the rear stator 230.
The rest is the same as in Embodiment 1.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the in- vention may be devised by a person skilled in the art without de- parting from the basic scope thereof, and the scope thereof is de- termined by the claims that follow.

Claims (12)

CONCLUSIESCONCLUSIONS 1. Anti-twist pomp-straalvoortstuwingsinrichting tegen verdraaien, met het kenmerk, dat: een voorste vrije waaier (100), een voorste stator (210), een rotor (220), een achterste stator (230) en een achterste vrije waaier (300) achtereenvolgens zijn opgenomen van voor naar achter in een axiale richting; ten minste één voorste elektrische snijder (400) vast is aangebracht aan de voorkant van de voorste stator (210); ten minste één achterste elektrische snijder (500) vast is aangebracht aan de achterkant van de achterste stator (230); de voorste stator (210), de rotor (220), de achterste stator (230) en een externe vaste huls zijn voorzien van een taps toelopende leiding (240); de achterste vrije waaier (300) zich bevindt in de taps toelopende leiding (240), of de achterste vrije waaier (300) vast is verbonden met een achterste leiding (340), het achterste uiteinde van de achterste leiding (340) is omhuld buiten de taps toelopende leiding (240), en de opening tussen de achterste vrije waaier (300) en de taps toelopende leiding (240) kleiner is dan de afmeting van een voorwerp dat verdraaid kan zijn; de voorste vrije waaier (100) is aangebracht in de taps toelopende leiding (240), of de voorste vrije waaier (100) vast is verbonden met een voorste leiding (140), de buitenste binnendiameter van de voorste leiding (140) minder is dan of gelijk is aan de buitendiameter van de voorste vrije waaier (100), en het achterste uiteinde van de voorste leiding (140) omhuld is buiten de tapse leiding (240), en de opening tussen de voorste leiding (140) en de tapse leiding (240) kleiner is dan de grootte van een mogelijk verdraaid artikel.An anti-twist pump jet propulsion device against twisting, characterized in that : a front free impeller (100), a front stator (210), a rotor (220), a rear stator (230) and a rear free impeller ( 300) are consecutively shot from front to back in an axial direction; at least one front electric cutter (400) is fixed to the front of the front stator (210); at least one rear electric cutter (500) is fixedly mounted to the rear of the rear stator (230); the front stator (210), the rotor (220), the rear stator (230) and an external fixed sleeve are provided with a tapered lead (240); the rear free impeller (300) is in the tapered duct (240), or the rear free impeller (300) is rigidly connected to a rear duct (340), the rear end of the rear duct (340) is sheathed outside the tapered conduit (240), and the gap between the trailing free impeller (300) and the tapered conduit (240) is less than the size of an object that can be twisted; the front free impeller (100) is fitted in the tapered pipe (240), or the front free impeller (100) is rigidly connected to a front pipe (140), the outer inner diameter of the front pipe (140) is less than or equal to the outer diameter of the front free impeller (100), and the rear end of the front pipe (140) is shrouded outside the tapered pipe (240), and the gap between the front pipe (140) and the tapered pipe (240) is less than the size of a potentially twisted item. 2. Anti-twist pomp-straalvoortstuwingsinrichting tegen verdraaien volgens conclusie 1, met het kenmerk, dat: de voorste waaiers (110) van de voorste vrije waaier (100) zijn verbonden met een voorste waaiernaaf (120) en op een radiale manier gelijkmatig zijn verdeeld langs de omtreksrichting van de voorste waaiernaaf (120) die is bevestigd aan de buitenste ring van een voorste wentellager (130), waarbij de binnenring van het voorste wentellager (130) is bevestigd op een voorste huls (150) die is bevestigd op een achterste ashuls (9210) die is verbonden met een romp (900) door middel van lassen of bevestiging; de voorste stator (210) waartoe de pompstraalpomp (200) behoort op de achterste ashuls (910) is gehuld, waarbij de rotor (220) waartoe de pompstraalpomp (200) behoort is verbonden met de achterste as (920) die zich uitstrekt vanuit de achterste ashuls (910), en waarbij de taps toelopende leiding (240) is verbonden met de romp (900) via een steun (930); een achterste waaiers (310) van de achterste vrije waaier (300) zijn verbonden met een achterste waaiernaaf (320) en op een radiale manier gelijkmatig zijn verdeeld langs de omtreksrichting van de achterste waaiernaaf (320) die is bevestigd aan de buitenste ring van een achterste wentellager {330), waarbij de binnenring van het achterste wentellager (330) is bevestigd op een achterste huls (350) die op de as van de achterste stator (230) is bevestigd door lassen of bevestiging; een voorste elektrische snijder (400) met niet minder dan twee delen uniform is bevestigd aan de naaf van de voorste stator (210) en zich bevindt voor de voorste stator (210) tegenover de voorste vrije waaier (100), en de as van de voorste elektrische snijder (400) evenwijdig is aan de as van de achterste ashuls (910); niet minder dan twee achterste elektrische snijders (500) uniform zijn bevestigd op de as van de achterste stator (230) en zich bevinden achter de achterste stator (230) tegenover de achterste vrije waaier (300), en waarbij de as van de achterste elektrische snijder (500) evenwijdig is aan de as van de achterste stator (230).The twist anti-twist pump jet propulsion device according to claim 1, characterized in that : the front impellers (110) of the front free impeller (100) are connected to a front impeller hub (120) and are smooth in a radial manner distributed along the circumferential direction of the front impeller hub (120) attached to the outer ring of a front rolling bearing (130), the inner ring of the front rolling bearing (130) mounted on a front sleeve (150) mounted on a rear axle sleeve (9210) connected to a hull (900) by welding or fastening; the front stator (210) to which the pump jet pump (200) belongs is shrouded on the rear shaft sleeve (910), with the rotor (220) to which the pump jet pump (200) belongs connected to the rear shaft (920) extending from the rear axle sleeve (910), and wherein the tapered conduit (240) is connected to the hull (900) via a bracket (930); a rear impellers (310) of the rear free impeller (300) are connected to a rear impeller hub (320) and are evenly spaced in a radial manner along the circumferential direction of the rear impeller hub (320) which is attached to the outer ring of a rear rolling bearing {330), the inner ring of the rear rolling bearing (330) being fixed on a rear sleeve (350) which is fixed to the shaft of the rear stator (230) by welding or fixing; a front electric cutter (400) of not less than two pieces uniformly attached to the hub of the front stator (210) and located in front of the front stator (210) opposite the front free impeller (100), and the shaft of the front electric cutter (400) is parallel to the axis of the rear shaft sleeve (910); not less than two rear electric cutters (500) are mounted uniformly on the shaft of the rear stator (230) and are located behind the rear stator (230) opposite the rear free impeller (300), and with the shaft of the rear electric cutter (500) is parallel to the axis of the rear stator (230). 3. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 2, met het kenmerk, dat: de binnenste waaiers (141) van de voorste leiding gelijkmatig zijn aangebracht op een centripetale manier langs de binnenomtrek van de voorste leiding (140), waarbij de delen van de binnenste waaiers (141) van de voorste leiding en de voorste waaiers (110)The anti-twist pump jet propulsion device according to claim 2, characterized in that : the inner impellers (141) of the forward conduit are evenly arranged in a centripetal manner along the inner periphery of the forward conduit (140), the parts of the front pipe inner impellers (141) and the front impellers (110) die zich in de voorste leiding bevinden (140) niet alleen dezelfde waaiersectie, maar hebben ook dezelfde waaierdraairichting hebben, maar waarbij de lengte van de binnenste waaiers (141) van de voorste leiding de voorste waaiernaaf (120) niet bereikt; waarbij het achterste deel van de voorste leiding (140) het voorste deel van de taps toelopende leiding (240) kan afschermen tegen de kabel die in de opening tussen de voorste vrije waaier (100) en de voorste stator (210) stroomt; waarbij de binnenste waaiers (311) van de achterste leiding uniform zijn aangebracht in een centripetale vorm langs de binnenomtrek van de achterste leiding (340), waarbij de binnenste waaiers (311) van de achterste leiding niet alleen hetzelfde waaiergedeelte hebben als de achterste waaiers (310) , maar ook dezelfde draairichting van de waaier hebben, maar waarbij de lengte van de binnenste waaiers van de achterste leiding (311) de achterste waaiernaaf (320) niet bereikt; waarbij wanneer een achterste leiding (340) is voorzien, een voorste deel van de achterste leiding (340) een achterste deel van de taps toelopende leiding (240) kan afschermen tegen kabel die in een opening tussen de achterste vrije waaier (300) en de achterste stator stroomt (230); waarbij wanneer de achterste leiding (340) niet is voorzien, de achterste vrije waaier (300) zich in de tapse leiding (240) bevindt.which are in the front duct (140) not only have the same impeller section, but also have the same impeller rotation direction, but the length of the inner impellers (141) of the front duct does not reach the front impeller hub (120); wherein the rear portion of the front duct (140) can shield the front portion of the tapered duct (240) from the cable flowing in the gap between the front free impeller (100) and the front stator (210); wherein the inner impellers (311) of the rear duct are uniformly arranged in a centripetal shape along the inner periphery of the rear duct (340), wherein the inner impellers (311) of the rear duct not only have the same impeller section as the rear impellers ( 310), but also have the same direction of rotation of the impeller, but the length of the inner impellers of the rear duct (311) does not reach the rear impeller hub (320); wherein when a rear conduit (340) is provided, a front portion of the rear conduit (340) can shield a rear portion of the tapered conduit (240) from cable running in a gap between the rear free impeller (300) and the rear stator currents (230); wherein when the rear conduit (340) is not provided, the rear free impeller (300) is in the tapered conduit (240). 4. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 2, met het kenmerk, dat: de voorste waaier (110) van de voorste vrije waaier (100) is verdeeld in een centrale waaier (111) en een buitenste waaier (112}5 de diameter van de gehele voorste waaier (110) 0,95-1,5 keer de diameter van de voorste stator (210) is; de buitenste waaier (112) een waaier van een scheepsschroef of een turbinewaaier is die zich op natuurlijke wijze uitstrekt vanaf de centrale waaier (111).The anti-twist pump jet propulsion device according to claim 2, characterized in that : the front impeller (110) of the front free impeller (100) is divided into a central impeller (111) and an outer impeller (112}5 the diameter of the entire front impeller (110) is 0.95-1.5 times the diameter of the front stator (210); the outer impeller (112) is a marine propeller or turbine impeller extending naturally from the central impeller (111). 5. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 4, met het kenmerk, dat:5. An anti-twist pump jet propulsion device according to claim 4, characterized in that : wanneer de voorwaaier (110) integraal is: de voorste leiding (140) vast is aangebracht aan de buitenrand van de voorste waaier (110); wanneer de voorste waaier (110) is gesplitst: de voorste leiding (140) is voorzien aan de bovenrand van de centrale waaier (111) en de buitenste waaier (112) gelijkmatig en radiaal is aangebracht langs de buitenomtrek van de voorste leiding (140), en in dit geval kan het aantal waaiers van de centrale waaier (111) en de buitenste waaier (112) hetzelfde zijn of verschillend zijn; waarbij de voorste leiding (140) wordt ondersteund door de bovenrand van de centrale waaier (111) die deze ontvangt.when the front impeller (110) is integral: the front conduit (140) is fixedly attached to the outer edge of the front impeller (110); when the front impeller (110) is split: the front pipe (140) is provided on the upper edge of the central impeller (111) and the outer impeller (112) is arranged evenly and radially along the outer periphery of the front pipe (140) , and in this case, the number of impellers of the central impeller (111) and the outer impeller (112) may be the same or different; the front duct (140) being supported by the top edge of the central impeller (111) receiving it. 6. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 4, met het kenmerk, dat: wanneer de voorste leiding (140) is voorzien, een achterste deel van de voorste leiding (140) een voorste deel van de taps toelopende leiding (240) kan afschermen waartoe de pompstraalpropeller (200) behoort; wanneer de voorste leiding (140) niet is voorzien, de voorste vrije waaier (100) wordt geplaatst in de tapse leiding (240) waartoe de pompstraalpropeller (200) behoort, om ervoor te zorgen dat het touw niet kan stromen in de opening tussen de voorste stator (210) van de voorste vrije waaier (100) in de aanwezigheid/afwezigheid van de voorste leiding (140); de dwarsdoorsnede van de voorste leiding (140) een plat oppervlak is, of een vleugelprofiel voor algemeen gebruik van een roterende leiding van een schip.An anti-twist pump-jet propulsion device according to claim 4, characterized in that : when the forward conduit (140) is provided, a rear portion of the forward conduit (140) can be a forward portion of the tapered conduit (240) shield to which the pump jet propeller (200) belongs; if the front pipe (140) is not provided, the front free impeller (100) is placed in the tapered pipe (240) to which the pump jet propeller (200) belongs, to ensure that the rope cannot flow into the gap between the front stator (210) of the front free impeller (100) in the presence/absence of the front lead (140); the cross-section of the forward conduit (140) is a flat surface, or a general purpose airfoil of a ship's rotating conduit. 7. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 4, met het kenmerk, dat: er een gemeenschappelijk nummer, of geen gemeenschappelijk nummer, tussen het aantal centrale waaiers (111) en/of het aantal buitenste waaiers (112) van de voorste vrije waaier (100) en het aantal waaiers van de rotor (220) is; de draairichting van de centrale waaier (111) in dezelfde richting is als de draairichting van de waaiers van de voorste stator (210), en beide in een andere richting zijn dan de draairichting van de waaiers van de rotor (220) zodat de centrale waaier (111)An anti-twist pump-jet propulsion device according to claim 4, characterized in that : there is a common number, or no common number, between the number of central impellers (111) and/or the number of outer impellers (112) of the forward free impeller (100) and the number of impellers of the rotor (220); the direction of rotation of the central impeller (111) is in the same direction as the direction of rotation of the impellers of the front stator (210), and both are in a different direction from the direction of rotation of the impellers of the rotor (220) so that the central impeller (111) en de voorste stator (210) gezamenlijk de omgekeerde voorrotatie van de voorwaartse instroom van de rotor (220) versterken; waarbij de draai-/instelrichting van de buitenste waaier (112) aan de volgende voorwaarden moet voldoen: in het geval dat de waaier (112) meedraait met de centrale waaier (111), valt de richting van de door de waaier (112) opgewekte hulpstuwkracht samen met de richting van de hoofdstuwkracht gegenereerd door de rotor (220).and the front stator (210) collectively amplify the reverse pre-rotation of the forward inflow of the rotor (220); where the rotation/setting direction of the outer impeller (112) must meet the following conditions: in case the impeller (112) rotates with the central impeller (111), the direction of the impeller (112) generated by the impeller (112) falls auxiliary thrust together with the direction of the main thrust generated by the rotor (220). 8. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 2, met het kenmerk, dat: de diameter van de achterste vrije waaier (300) 0,9 tot 1,1 maal de diameter van de achterste stator (230) is; de waaiers (310) van de achterste vrije waaier (300) integraal zijn en waaiers van het turbinetype of waaiers van het scheepsschroeftype kunnen zijn, en er een gemeenschappelijk aantal of geen gemeenschappelijk aantal is tussen het aantal waaiers daarvan en het aantal van waaiers van de rotor (220); de draairichting van de achterste waaiers (310) van de achterste vrije waaier (300) in dezelfde richting is als de draairichting van de waaiers van de achterste stator (230), en beide in dezelfde richting als de draairichting van de waaiers van de rotor (220) zijn, zodat de achterste waaiers (310) en de achterste stator (230) samen de energie van de waterstroom achter de rotor (220) terugwinnen.An anti-twist pump-jet propulsion device according to claim 2, characterized in that : the diameter of the aft free impeller (300) is 0.9 to 1.1 times the diameter of the aft stator (230); the impellers (310) of the rear free impeller (300) are integral and may be turbine type impellers or marine propeller type impellers, and there is a common number or no common number between the number of impellers thereof and the number of impellers of the impeller (220); the direction of rotation of the rear impellers (310) of the rear free impeller (300) is in the same direction as the direction of rotation of the impellers of the rear stator (230), and both in the same direction as the direction of rotation of the impellers of the rotor ( 220) so that the rear impellers (310) and the rear stator (230) together recover the energy of the water flow behind the rotor (220). 9. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 1, met het kenmerk, dat: de voorste elektrische snijder (400) en de achterste elektrische snijder (500) beide een schijfwaaier gebruiken; waarbij het wentellager is gemaakt van een technische kunststof met een zelfsmerende functie.The anti-twist pump jet propulsion apparatus according to claim 1, characterized in that : the front electric cutter (400) and the rear electric cutter (500) both use a disk impeller; where the rolling bearing is made of an engineering plastic with a self-lubricating function. 10. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 1, met het kenmerk, dat: de kabelleiding en de smeerolieleiding langs de steun (930), de voorste stator (210), de achterste stator (230) en de achterste ashuls (210) naar de voorste en achterste elektrische snijders en de voorste en achterste vrije waaiers zijn geplaatst, om stroom te leveren aan de elektrische snijders en olie te leveren aan de wentellagers.The anti-twist pump jet propulsion device according to claim 1, characterized in that : the cable line and the lubricating oil line along the strut (930), the front stator (210), the rear stator (230) and the rear shaft sleeve (210) to the front and rear electric cutters and the front and rear free impellers, to supply power to the electric cutters and oil to the rolling bearings. 11. Anti-twist pomp-straalvoortstuwingsinrichting volgens conclusie 10, met het kenmerk, dat: de kabelbuis en smeeroliebuis door de tapse leiding (240) in het inwendige van de pomp- straalwaaier (200) lopen.An anti-twist pump-jet propulsion apparatus according to claim 10, characterized in that : the conduit and lubricating oil tube pass through the tapered conduit (240) into the interior of the pump-jet impeller (200). 12. Werkwijze voor het bedienen van een anti-twist pomp-straal- voortstuwingsinrichting, gekenmerkt door: het gebruik van de anti- twist pomp-straalvoortstuwingsinrichting volgens conclusie 5; als volgt: de voorste leiding (140) en de tapse leiding (240) vormen een omtreksscherm naar de rotor (220), zodat het touw alleen kan stromen vanaf het voorste deel van de voorste leiding (140) bij het vooruit navigeren, en alleen kan stromen van het achterste deel van de taps toelopende leiding (240) naar de pomp- straalpropeller (200) wanneer achteruit wordt genavigeerd; wanneer de hoofdmotor van het schip naar voren loopt, de rotor (220) wordt aangedreven om te draaien, en de rotatie van de rotor {220) een zuigeffect genereert, zodat de waterstroom van voren naar achteren stroomt, en de voorste vrije waaier draait; of wanneer de hoofdmotor van het schip achteruit loopt, de verkregen waterstroom van achteren naar voren stroomt, en wanneer de waterstroom door de achterste vrije waaier stroomt, de achterste vrije waaier roteert; het touw stroomt van de voorkant naar de voorste vrije waaier (100) bij het vooruit varen, en van de achterste naar de achterste vrije waaier (300) stroomt bij het achteruit varen; het touw wordt gedraaid door de voorste of achterste vrije waaier en geleidelijk naar beneden glijdt naar de positie nabij de elektrische snijder onder invloed van waterstroom, zodat de rotor (220) niet kan worden gedraaid; waarbij de rotor (220) op dit moment nog kan draaien om het schip voort te stuwen om te varen; aangezien de kabel is verdraaid op de voorste of achterste vrije waaier, de stroomlijn en de stroomsnelheid naar de rotor (220) worden veranderd, wat resulteert in de verandering van snelheid; uit de verandering in de snelheidsmeteraflezingen, bepaalt de bestuurder dat de vrije waaier is gedraaid, en de bestuurder activeert de voorste of achterste elektrische snijders om het touw door te snijden.A method of operating an anti-twist pump-jet propulsion device, characterized by : using the anti-twist pump-jet propulsion device of claim 5; as follows: the forward pipe (140) and the tapered pipe (240) form a circumferential screen to the rotor (220) so that the rope can only flow from the forward part of the forward pipe (140) when navigating ahead, and only can flow from the aft portion of the tapered conduit (240) to the pump jet propeller (200) when navigating backwards; when the ship's main engine runs forward, the rotor (220) is driven to rotate, and the rotation of the rotor {220) generates a suction effect, so that the water flow flows from front to back, and the front free impeller rotates; or when the ship's main engine runs backwards, the resulting water flow flows from the back to the front, and when the water flow flows through the aft free impeller, the aft free impeller rotates; the rope flows from the front to the front free impeller (100) when sailing forward, and flows from the aft to the aft free impeller (300) when sailing astern; the rope is rotated by the front or rear free impeller and gradually slides down to the position near the electric cutter under the action of water flow, so that the rotor (220) cannot be rotated; wherein the rotor (220) can still rotate at this time to propel the ship to sail; as the cable is twisted on the leading or trailing free impeller, the streamline and flow rate to the rotor (220) are changed, resulting in the change of velocity; from the change in the speedometer readings, the driver determines that the free impeller has turned, and the driver activates the front or rear electric cutters to cut the rope.
NL2031507A 2021-08-27 2022-04-05 Anti-twisting pump-jet propulsion device and operating method thereof NL2031507B1 (en)

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