CN113562150A - Anti-winding pump spraying propulsion device and working method - Google Patents

Anti-winding pump spraying propulsion device and working method Download PDF

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Publication number
CN113562150A
CN113562150A CN202110994372.0A CN202110994372A CN113562150A CN 113562150 A CN113562150 A CN 113562150A CN 202110994372 A CN202110994372 A CN 202110994372A CN 113562150 A CN113562150 A CN 113562150A
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CN
China
Prior art keywords
guide pipe
blades
impeller
stator
blade
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Pending
Application number
CN202110994372.0A
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Chinese (zh)
Inventor
刘和炜
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Fishery Machinery and Instrument Research Institute of CAFS
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Fishery Machinery and Instrument Research Institute of CAFS
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Application filed by Fishery Machinery and Instrument Research Institute of CAFS filed Critical Fishery Machinery and Instrument Research Institute of CAFS
Priority to CN202110994372.0A priority Critical patent/CN113562150A/en
Publication of CN113562150A publication Critical patent/CN113562150A/en
Priority to NL2031507A priority patent/NL2031507B1/en
Pending legal-status Critical Current

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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
    • 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

Abstract

The invention relates to an anti-winding pump spray propulsion device which sequentially comprises a front free impeller, a front stator, a rotor, a rear stator and a rear free impeller from front to back in the axial direction; the front part of the front stator is fixedly provided with at least one front electric cutter; the rear part of the rear stator is fixedly provided with at least one rear electric cutter; a conical conduit is fixedly sleeved on the front stator, the rotor, the rear stator and the outer part; the rear free impeller is positioned in the conical guide pipe, or the rear free impeller is fixedly connected with a rear guide pipe, the rear end of the rear guide pipe is sleeved outside the conical guide pipe, and the gap between the rear free impeller and the conical guide pipe is smaller than the size of an object which can be wound; the front free impeller is arranged inside the tapered guide pipe, or the front free impeller is fixedly connected with a front guide pipe, the outer diameter of the front guide pipe is smaller than or equal to that of the front free impeller, the rear end of the front guide pipe is sleeved outside the tapered guide pipe, and the size of a gap between the front guide pipe and the tapered guide pipe is smaller than that of an object which can be wound.

Description

Anti-winding pump spraying propulsion device and working method
Technical Field
The invention relates to a ship propeller, in particular to an anti-winding pump jet propulsion device and a working method, and belongs to the technical field of ship propulsion.
Background
When a ship sails in a fishing area or a marine culture area, the ship is often wound by a rope or a net, so that a propeller stops rotating, and personnel is needed to go down to maintain, and even inconvenience is caused.
The pump jet propeller is a marine propeller, and its exterior is a conduit, and two ends or only one end of the conduit are equipped with stator, and the blade end portion of the stator is connected with the conduit and fixed, and can not be rotated, so that it is called stator. The middle part of the guide pipe is provided with a propeller, also called a rotor, and the axes of the stator and the rotor are positioned on the same straight line. The conventional rotor is driven by connecting the tail shaft of the hull through the center of the forward stator to the hub of the rotor, and there are rotors using electric propulsion placed in the duct without the tail shaft.
Chinese patent publication No. CN111572744A, published as 2020.08.25, entitled "a hydraulic shear device for underwater winding of pump jet propeller of ship" discloses a device for breaking a rope wound on a propeller of a pump jet propeller. The scheme has the following defects: firstly, the scheme belongs to passive defense and is not active defense, and the propeller can only react to destroy after being wound. Secondly, the problem of the winding of the propeller by the rope when the ship is sailing cannot be solved.
Disclosure of Invention
The invention aims to provide an anti-winding pump jet propulsion device and an operating method thereof, which can react before a rope approaches a propeller (namely a rotor) in the pump jet propulsion device, stop the rope outside the propeller and prevent the propeller from being wound. Meanwhile, the propeller can be prevented from being wound in a forward or reverse sailing state. Hereinafter, the rotor refers to a propeller in the pump jet propulsion device.
The invention adopts the following technical scheme:
an anti-winding pump jet propulsion unit sequentially comprises a front free impeller 100, a front stator 210, a rotor 220, a rear stator 230 and a rear free impeller 300 from front to rear in the axial direction; at least one front electric cutter 400 is fixedly arranged at the front part of the front stator 210; at least one rear electric cutter 500 is fixedly arranged at the rear part of the rear stator 230; the front stator 210, the rotor 220, the rear stator 230 and the outer part are fixedly sleeved with a conical conduit 240; the rear free impeller 300 is positioned in the tapered guide pipe 240, or the rear free impeller 300 is fixedly connected with a rear guide pipe 340, the rear end of the rear guide pipe 340 is sleeved outside the tapered guide pipe 240, and the gap between the rear free impeller 300 and the tapered guide pipe 240 is smaller than the size of an object which can be wound; the front free impeller 100 is disposed inside the tapered guide tube 240, or the front free impeller 100 is fixedly connected to a front guide tube 140, an inner diameter of the front guide tube 140 is less than or equal to an outer diameter of the front free impeller 100, a rear end of the front guide tube 140 is sleeved outside the tapered guide tube 240, and a gap between the front guide tube 140 and the tapered guide tube 240 is smaller than a size of an object which may be wound.
Preferably, the front blades 110 of the front free impeller 100 are connected to the front impeller hub 120 and radially distributed along the circumference of the front impeller hub 120, the front impeller hub 120 is fixed to the outer ring of the front rolling bearing 130, the inner ring of the front rolling bearing 130 is fixed to the front sleeve 150, and the front sleeve 150 is fixed to the tail shaft sleeve 910 connected to the hull 900 by welding or fastening members; the front stator 210 of the pump jet propeller 200 is sleeved on the tail shaft sleeve 910, the rotor 220 of the pump jet propeller 200 is connected with the tail shaft 920 extending out of the tail shaft sleeve 910, and the conical guide pipe 240 is connected with the ship body 900 through a support 930; the rear blades 310 of the rear free impeller 300 are connected with the rear impeller hub 320 and are radially and uniformly distributed along the circumferential direction of the rear impeller hub 320, the rear impeller hub 320 is fixed on the outer 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 through welding or fasteners; at least 2 front electric cutters 400 are uniformly fixed at the hub of the front stator 210, are positioned in front of the front stator 210 and are opposite to the front free impeller 100, and the axis of the front electric cutters 400 is parallel to the axis of the tail shaft sleeve 910; at least 2 rear electric cutters 500 are uniformly fixed to the shaft of the rear stator 230, are positioned behind the rear stator 230, and face 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, the inner vanes 141 of the front duct are uniformly and radially arranged along the inner circumference of the front duct 140, the vane section of the inner vanes 141 of the front duct is the same as that of the front vane 110 in the duct 140, and the twisting directions of the vanes of the inner vanes 141 of the front duct are the same, but the length of the inner vanes 141 of the front duct does not reach the front impeller hub 120; the rear part of the front guide duct 140 can shield the front part of the tapered guide duct 240 to prevent the rope from flowing in from the gap between the front free impeller 100 and the front stator 210; the rear duct inner blades 311 are uniformly and centripetally arranged along the inner circumference of the rear duct 340, the rear duct inner blades 311 are the same as the rear blades 310 in blade section, the twisting directions of the blades of the rear duct inner blades 311 and the rear blades 310 are the same, but the length of the rear duct inner blades 311 cannot reach the rear impeller hub 320; when the rear duct 340 is provided, the front part of the rear duct 340 can shield the rear part of the tapered duct 240, and the rope is prevented from flowing into the gap between the rear free impeller 300 and the rear stator 230; when the rear duct 340 is not provided, the rear free impeller 300 is inside the tapered duct 240.
Further, the front blade 110 of the front free impeller 100 is divided into a central blade 111 and an outer blade 112; the diameter of the entire front blade 110 is 0.95 to 1.5 times the diameter of the front stator 210; the outer blades 112 are propeller blades for ships or turbine blades that are naturally extended from the center blades 111.
Further, when the front blade 110 is one-piece: the front duct 140 is fixedly provided at the outer edge of the front vane 110; when the front blade 110 is split: the leading duct 140 is provided at the top edge of the central vane 111, and the outer vanes 112 are provided uniformly and radially in the outer circumferential direction of the leading duct 140, in which case, the number of the central vane 111 and the number of the outer vanes 112 may be the same or different; front conduit 140 is supported by the top edge of central portion vane 111 that it receives.
Still further, when the front conduit 140 is provided, the rear portion of the front conduit 140 can shield the front portion of the tapered conduit 240 to which the pump jet 200 belongs; when the front guide duct 140 is not provided, the front free impeller 100 is disposed inside the tapered guide duct 240 to which the pump jet propeller 200 belongs to ensure that the rope is prevented from flowing in from the gap between the front stators 210 of the front free impeller 100 in the presence/absence of the front guide duct 140; the cross-section of the front duct 140 is a flat surface, or a universal airfoil cross-section of a vessel turning duct.
Still further, there is a common divisor, or no common divisor, between the number of blades 111 in the center portion of front free impeller 100 and/or the number of blades 112 in the outer portion and the number of blades of rotor 220; the twisting direction of the central blade 111 is the same as that of the front stator 210, and the twisting directions of the central blade 111 and the front stator 210 are opposite, so that the central blade 111 and the front stator 210 jointly enhance the reverse pre-rotation of the incoming flow in front of the rotor 220; the twisting direction/setting direction of outer blades 112 should satisfy the following condition: in the case where blades 112 are rotating with central blades 111, the direction of the auxiliary thrust generated by blades 112 coincides with the direction of the main thrust generated by 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 blades 310 of the rear free impeller 300 are integrated, and may be turbine blades or marine propeller blades, and the number of the blades has a common divisor or no common divisor with the number of the blades of the rotor 220; the twisting direction of the rear blades 310 of the rear free impeller 300 is the same as that of the rear stator 230, and is the same as that of the blades of the rotor 220, so that the rear blades 310 and the rear stator 230 jointly recover the energy of the water flow behind the rotor 220.
Preferably, the front electric cutter 400 and the rear electric cutter 500 both adopt disc blades; the rolling bearing is made of engineering plastics with a self-lubricating function.
Preferably, the cable pipe and the lubricating oil pipe are laid along the bracket 930, the front stator 210, the rear stator 230 and the tail shaft sleeve 910 to the front and rear electric cutters and the front and rear free impellers to supply power to the electric cutters and the rolling bearings.
Further, the cable tube and the lubrication oil tube pass through the tapered guide 240 into the inside of the pump jet 200.
The working method of the anti-winding pump spraying propulsion device adopts the anti-winding pump spraying propulsion device; when in work: the front conduit 140 and the tapered conduit 240 form a circumferential shelter for the rotor 220, so that the rope can only flow from the front part of the front conduit 140 during forward sailing and can only flow from the rear part of the tapered conduit 240 to the pump jet propeller 200 during backward sailing; when the ship main engine operates and is in forward navigation, the rotor 220 is driven to rotate, the rotor 220 rotates to generate a pumping effect, so that water flows from front to back, and the front free impeller rotates; or when the ship main engine runs and sails backwards, the obtained water flows from back to front, and when the water flows through the rear free impeller, the rear free impeller rotates; when the ship is in forward sailing, the rope flows to the front free impeller 100 from the front part, and when the ship is in backward sailing, the rope flows to the rear free impeller 300 from the rear part; the rope is rotated by the front or rear free impeller and gradually slides to a position close to the electric cutter under the action of water flow, so that the rope cannot wind the rotor 220; at this time, the rotor 220 can still rotate to push the ship to sail; because the rope is wound on the front or rear free impeller, the flow line and the flow of the water flow reaching the rotor 220 are changed, so that the navigation speed is changed; and in the reading change of the speed meter, the driver judges that the free impeller is wound, and then the driver starts the front or rear electric cutting knife to cut the rope.
The basic principle of the invention is as follows: the free-spinning impeller encounters the cable before the propeller and winds the cable, preventing the cable from flowing toward the propeller, thereby preventing the cable from winding around the propeller and then being cut.
The invention has the beneficial effects that:
1) utilize free impeller to revolute the rope before the screw, avoided the rotor to be twined, when breaking the winding, need not shut down a journey, design benefit.
2) The rope can be prevented from winding during forward and backward sailing.
3) The reverse prerotation formed by the front free impeller and the front stator and the energy recovery formed by the rear free impeller and the rear stator are both beneficial to improving the working efficiency of the propeller.
4) The design of the front guide pipe and the tapered guide pipe can effectively prevent the rope from flowing into the gap between the free impeller and the stator.
5) The circumference of the impeller hub is small, so that more blades are difficult to arrange, the circumference of the guide pipe is long, and more blades can be arranged, so that the short central blade is arranged, the proper gap encryption is facilitated, and the rope winding is facilitated.
Drawings
Fig. 1 is a schematic diagram of the general arrangement of the anti-winding pump jet propulsion unit, which comprises two structural forms (a) and (b).
Fig. 2 is a schematic view of a pump jet impeller in combination with a front and rear free impeller.
Fig. 3 is a sectional view of the front free impeller in the first embodiment.
Fig. 4 is a sectional view of the front free impeller in the second embodiment.
Fig. 5 is a sectional view of the rear free impeller mounted on the shaft of the rear stator.
In the drawing, 900. a hull, 910. a tail shaft sleeve, 920. a tail shaft, 930. a bracket, 100. a front free impeller, 110. a front blade, 111. a center blade, 112. an outer blade, 120. a front free impeller hub, 130. a front free impeller rolling bearing, 140. a front duct, 141. a front duct inner blade, 150. a front sleeve, 200. a pump jet propeller, 210. a front stator, 220. a rotor, 230. a rear stator, 240. a tapered duct, 300. a rear free impeller, 310. a rear blade, 311. a rear duct inner blade, 320. a rear free impeller hub, 330. a rear free impeller rolling bearing, 340. a rear free impeller duct, 400. a front electric cutter, 500. a rear electric cutter.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The first embodiment is as follows:
referring to fig. 1, the pump-jet propulsion device for preventing the propeller from being wound sequentially comprises 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 from front to rear;
referring to fig. 1 to 5, the front blades 110 of the front free impeller 100 are connected to the front impeller hub 120 and radially distributed along the circumference of the front impeller hub 120, the front impeller hub 120 is fixed to the outer ring of the rolling bearing 130, the inner ring of the rolling bearing 130 is fixed to the sleeve 150, and the sleeve 150 may be fixed to the tail shaft sleeve 910 connected to the hull 900 by welding or fastening members; the front stator 210 of the pump jet propeller 200 is sleeved on the tail shaft sleeve 910, the rotor 220 of the pump jet propeller 200 is connected with the tail shaft 920 extending out of the tail shaft sleeve 910, and the conical guide pipe 240 is connected with the ship body 900 through a support 930; the blades 310 of the rear free impeller 300 are connected with the rear impeller hub 320 and are radially and uniformly distributed 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 through welding or fasteners; at least 2 front electric cutters 400 are uniformly fixed at the hub of the front stator 210, are positioned in front of the front stator 210 and are opposite to the front free impeller 100, and the axis of the electric cutters 400 is parallel to the axis of the tail shaft sleeve 910; at least 2 rear electric cutters 500 are uniformly fixed to the shaft of the rear stator 230, are positioned behind the rear stator 230, face the rear free impeller 300, and have axes parallel to the shaft of the rear stator 230.
In this embodiment, referring to fig. 3, the front blade 110 of the front free impeller 100 is divided into two parts, a center blade 111 and an outer blade 112, which are integrated, and the diameter of the entire front blade 110 is 0.95 to 1.5 times the diameter of the front stator 210; the center blade 111 is a turbine blade having a diameter 0.95 to 1.2 times the diameter of the front stator 210; the outer blades 112 may be propeller blades for ships, or may be naturally extended blades of the center portion 111, which are turbine blades; a front duct 140 is provided at an outer edge of the front vane 110;
in this embodiment, the front duct inner blades 141 are uniformly and radially arranged along the inner circumference of the front duct 140, the blade section of the front duct inner blades 141 and the part of the front blades 110 in the duct 140 are the same, and the twisting directions of the blades of the front duct inner blades 141 and the front blades 110 are the same, but the length of the front duct inner blades 141 does not reach the front impeller hub 120; the rear part of the front guide duct 140 can shield the front part of the tapered guide duct 240 to prevent the rope from flowing in from the gap between the front free impeller 100 and the front stator 210; the rear duct inner blades 311 are uniformly and radially arranged along the inner circumference of the rear duct 340, the rear duct inner blades 311 are the same as the rear blades 310 in blade section, the blade twisting directions of the rear duct inner blades 311 and the rear blades 310 are the same, but the length of the rear duct inner blades 311 cannot reach the rear impeller hub 320; the front portion of the rear duct 340 can shield the rear portion of the tapered duct 240 to prevent the rope from flowing in from the gap between the rear free impeller 300 and the rear stator 230.
In this embodiment, referring to fig. 1, when the front duct 140 is provided, the rear portion of the front duct 140 can shield the front portion of the tapered duct 240 to which the pump jet propeller 200 belongs, and when the front duct 140 is not provided (not shown in the drawings), the free impeller 100 can be disposed inside the tapered duct 240 to which the pump jet propeller 200 belongs to ensure that the rope is prevented from flowing into the gap between the front free impeller 100 and the front stator 210 with/without the front duct 140; the cross section of the front duct 140 may be a straight surface or a general airfoil section of a vessel turning duct.
In this embodiment, the number of blades 111 in the center of front free impeller 100 and/or the number of outer blades 112 may or may not have a common divisor with the number of blades of rotor 220; the twisting direction of the central blade 111 and the twisting direction of the front stator 210 are in the same direction (i.e. the twisting tendency is the same, but the twisting angles may be the same, or may be different, hereinafter "in the same direction" is the same), and are in different directions (i.e. the twisting tendency is opposite, but the absolute values of the twisting angles may be the same, or may be different, hereinafter "in the same direction" is the same) with the twisting direction of the blades of the rotor 220, so that the central blade 111 and the front stator 210 jointly enhance the reverse pre-rotation of the incoming flow in front of the rotor 220; the twisting direction/setting direction of outer blades 112 should satisfy the following condition: in the case where blade 112 is rotating with aforementioned blade 111, the direction of the assist thrust generated by blade 112 coincides with the direction of the main thrust generated by rotor 220.
In this embodiment, referring to fig. 5, the diameter of the rear free impeller 300 is 0.9 to 1.1 times the diameter of the rear stator 230; the blades 310 of the rear free impeller 300 are integrated, and may be turbine blades or marine propeller blades, and the number of the blades may or may not have a common divisor with the number of the blades of the rotor 220; the twisting direction of the blades 310 of the rear free impeller 300 is the same as that of the rear stator 230, and is the same as that of the blades of the rotor 220, so that the blades 310 and the rear stator 320 jointly recover the energy of the water flow behind the rotor 220; preferably, the rear free impeller 300 is inside the tapered duct 240.
In this embodiment, referring to fig. 1, the front and rear electric cutters are disc blades.
In this embodiment, the rolling bearing is preferably made of engineering plastics with self-lubricating function.
In this embodiment, the cable pipe and the lubricant pipe may be laid along the fixing structures such as the bracket 930, the front stator 210, the rear stator 230, the tail shaft sleeve 910, etc. to the front and rear electric cutters and the front and rear free impellers to supply power to the electric cutters and supply power to the rolling bearings, and the cable pipe and the lubricant pipe may be passed through the tapered guide 240 into the interior of the pump jet 200, if necessary.
The basic principle on which the anti-winding pump spraying propulsion device is based is as follows: the free-spinning impeller encounters the cable before the propeller and winds the cable, preventing the cable from flowing toward the propeller, thereby preventing the cable from winding around the propeller and then being cut.
When in 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 forward) and rear (when reverse) of the conduit, which first ensures that the rope cannot flow into the propeller from other directions, reducing the probability of the rope winding the rotor 220.
Secondly, when the ship main engine runs, the rotor 220 is driven to rotate, the rotor 220 rotates to generate a pumping effect, so that water flows from front to back (during forward sailing) or from back to front (during backward sailing), and when the water flows through the front and back free impellers, the front and back free impellers rotate. The rope flows from the front to the front free impeller 100 when the ship is in forward flight, and from the rear to the rear free impeller 300 when the ship is in reverse flight. The rope is revolved by the free impeller and gradually slides to a position close to the electric cutter under the action of water flow, so that the rope cannot wind the rotor 220. The rotor 220 may still rotate, propelling the vessel through the sea. Because the rope is wound on the free impeller, the streamline and the flow of the water flow reaching the rotor 220 are changed, so that the speed of the ship is changed. From the reading change of the speed meter, the driver can judge that the free impeller is wound, and then the driver can start the electric cutting knife in the cab to cut the rope.
When not in work: and closing the electric cutter.
Example two:
the difference between the present embodiment and the first embodiment is:
referring to fig. 4, the front vane 110 of the front free impeller 100 is divided into a central vane 111 and an outer vane 112, in which case, a front duct 140 is provided at the top edge of the central vane 111, and then the outer vanes 112 are uniformly and radially provided along the outer circumference of the front duct 140, the number of the central vane 111 and the number of the outer vanes 112 may be the same or different, and the front duct 140 is supported by the top edge of the vane received therein.
With continued reference to fig. 4, the inner vanes 141 of the front duct are uniformly and radially arranged along the inner circumference of the front duct 140, and the vane surfaces of the inner vanes 141 of the front duct and the part of the front vane 110 located in the front duct 140 are the same, but the vane twisting directions of the inner vanes 141 of the front duct are the same, but the length of the inner vanes 141 of the front duct does not reach the front impeller hub 120; the rear part of the front guide duct 140 can shield the front part of the tapered guide duct 240 to prevent the rope from flowing in from the gap between the front free impeller 100 and the front stator 210;
referring to fig. 5, the rear duct inner blades 311 are uniformly and radially arranged along the inner circumference of the rear duct 340, the rear duct inner blades 311 have the same blade section as the rear blades 310, and the blade twisting directions of the rear duct inner blades 311 and the rear blades 310 are the same, but the length of the rear duct inner blades 311 does not reach the rear impeller hub 320; the rear portion of the rear duct 340 can shield the rear portion of the tapered duct 240 to prevent the rope from flowing in from the gap between the rear free impeller 300 and the rear stator 230.
The rest is the same as the first embodiment.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or modifications based on the above description, which should fall within the scope of the claimed invention without departing from the spirit of the present invention.

Claims (12)

1. The utility model provides an antiwind pump spouts advancing device which characterized in that:
the axial direction sequentially comprises a front free impeller (100), a front stator (210), a rotor (220), a rear stator (230) and a rear free impeller (300) from front to back;
the front part of the front stator (210) is fixedly provided with at least one front electric cutter (400); at least one rear electric cutter (500) is fixedly arranged at the rear part of the rear stator (230);
the front stator (210), the rotor (220), the rear stator (230) and the outer part are fixedly sleeved with a conical conduit (240); the rear free impeller (300) is positioned in the tapered guide pipe (240), or the rear free impeller (300) is fixedly connected with a rear guide pipe (340), the rear end of the rear guide pipe (340) is sleeved outside the tapered guide pipe (240), and the gap between the rear free impeller and the tapered guide pipe (240) is smaller than the size of an object which can be wound;
the front free impeller (100) is arranged inside the tapered guide pipe (240), or the front free impeller (100) is fixedly connected with a front guide pipe (140), the outer inner diameter of the front guide pipe (140) is less than or equal to the outer diameter of the front free impeller (100), the rear end of the front guide pipe (140) is sleeved outside the tapered guide pipe (240), and the gap between the front guide pipe (140) and the tapered guide pipe (240) is smaller than the size of objects which can be wound.
2. The anti-wind pump jet propulsion unit of claim 1, wherein:
the front blades (110) of the front free impeller (100) are connected with a front impeller hub (120) and are uniformly distributed in a radial manner along the circumferential direction of the front impeller hub (120), the front impeller hub (120) is fixed on the outer ring of a front rolling bearing (130), the inner ring of the front rolling bearing (130) is fixed on a front sleeve (150), and the front sleeve (150) is fixed on a tail shaft sleeve (910) connected with a ship body (900) through welding or a fastening piece;
the front stator (210) to which the pump jet propeller (200) belongs is sleeved on the tail shaft sleeve (910), the rotor (220) to which the pump jet propeller (200) belongs is connected with a tail shaft (920) extending out of the tail shaft sleeve (910), and the conical guide pipe (240) is connected with the ship body (900) through a support (930);
rear blades (310) of the rear free impeller (300) are connected with a rear impeller hub (320) and are uniformly distributed in a radial mode along the circumferential direction of the rear impeller hub (320), the rear impeller hub (320) is fixed on an outer ring of a rear rolling bearing (330), an inner ring of the rear rolling bearing (330) is fixed on a rear sleeve (350), and the rear sleeve (350) is fixed on a shaft of a rear stator (230) through welding or a fastener;
at least 2 front electric cutters (400) are uniformly fixed at the hub of the front stator (210), are positioned in front of the front stator (210) and are opposite to the front free impeller (100), and the axis of the front electric cutters (400) is parallel to the axis of the tail shaft sleeve (910);
at least 2 rear electric cutters (500) are uniformly fixed on the shaft of the rear stator (230), are positioned behind the rear stator (230) and are opposite 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).
3. The anti-wind pump jet propulsion unit of claim 2, wherein:
the front guide pipe inner blades (141) are uniformly and centripetally arranged along the inner circumference of the front guide pipe (140), the blade section of the front guide pipe inner blades (141) and the part of the front blades (110) positioned in the front guide pipe (140) are the same, the blade twisting directions of the front guide pipe inner blades and the front blades are the same, but the length of the front guide pipe inner blades (141) cannot reach the front impeller hub (120); the rear part of the front guide pipe (140) can shield the front part of the conical guide pipe (240) to avoid the rope from flowing into a gap between the front free impeller (100) and the front stator (210);
rear duct internal blades (311) are uniformly and centripetally arranged along the inner circumferential direction of the rear duct (340), the blade section of each rear duct internal blade (311) is the same as that of the rear blade (310), the blade twisting directions of the rear duct internal blade and the rear blade are the same, and the length of each rear duct internal blade (311) cannot reach the rear impeller hub (320); when the rear duct (340) is arranged, the front part of the rear duct (340) can shield the rear part of the conical duct (240) to prevent the rope from flowing into a gap between the rear free impeller (300) and the rear stator (230); when the rear duct (340) is not provided, the rear free impeller (300) is inside the tapered duct (240).
4. The anti-wind pump jet propulsion unit of claim 2, wherein:
the front blade (110) of the front free impeller (100) is divided into a central blade (111) and an outer blade (112);
the diameter of the whole front blade (110) is 0.95 to 1.5 times of the diameter (210) of the front stator (210);
the outer blades (112) are propeller blades for ships or turbine blades that extend naturally from the center blade (111).
5. The anti-wind pump jet propulsion unit according to claim 4, characterized in that:
when the front blade (110) is one-piece: the front guide pipe (140) is fixedly arranged at the outer edge of the front vane (110);
when the front blade (110) is split: the leading duct (140) is arranged at the top edge of the central vane (111), the outer vanes (112) are uniformly and radially arranged along the outer circumferential direction of the leading duct (140), and in this case, the vane numbers of the central vane (111) and the outer vanes (112) can be the same or different; the front duct (140) is supported by the top edge of the central portion vane (111) which it receives.
6. The anti-wind pump jet propulsion unit according to claim 4, characterized in that:
when the front guide pipe (140) is arranged, the rear part of the front guide pipe (140) can shield the front part of the conical guide pipe (240) to which the pump jet propeller (200) belongs;
when the front guide pipe (140) is not arranged, the front free impeller (100) is arranged inside the conical guide pipe (240) to which the pump jet propeller (200) belongs so as to ensure that under the condition of existence/nonexistence of the front guide pipe (140), a rope is prevented from flowing into a gap between the front stators (210) of the front free impeller (100);
the cross section of the front duct (140) is a flat surface or a universal airfoil section of a vessel turning duct.
7. The anti-wind pump jet propulsion unit according to claim 4, characterized in that:
the number of blades (111) at the center of the front free impeller (100) and/or the number of outer blades (112) and the number of blades of the rotor (220) have common divisor or no common divisor;
the twisting direction of the central blade (111) and the twisting direction of the front stator (210) are in the same direction and are in different directions with the twisting direction of the rotor (220), so that the central blade (111) and the front stator (210) jointly enhance the reverse prerotation of the incoming flow in front of the rotor (220); the twisting direction/setting direction of the outer blade (112) should satisfy the following condition: when the blades (112) rotate with the central blade (111), the direction of the auxiliary thrust generated by the blades (112) is consistent with the direction of the main thrust generated by the rotor (220).
8. The anti-wind pump jet propulsion unit of claim 2, wherein: the diameter of the rear free impeller (300) is 0.9-1.1 times of that of the rear stator (230); the blades (310) of the rear free impeller (300) are integrated, can be turbine blades or marine propeller blades, and have common divisor or no common divisor with the number of the blades of the rotor (220); the twisting direction of the rear blades (310) of the rear free impeller (300) is the same as that of the rear stator (230) and the twisting direction of the blades of the rotor (220) is the same, so that the rear blades (310) and the rear stator (230) can jointly recover the energy of water flow behind the rotor (220).
9. The anti-wind pump jet propulsion unit of claim 1, wherein: the front electric cutter (400) and the rear electric cutter (500) both adopt disc blades; the rolling bearing is made of engineering plastics with a self-lubricating function.
10. The anti-wind pump jet propulsion unit of claim 1, wherein: the cable pipe and the lubricating oil pipe are laid on the front and rear electric cutters and the front and rear free impellers along the support (930), the front stator (210), the rear stator (230) and the tail shaft sleeve (910) to supply power to the electric cutters and supply oil to the rolling bearings.
11. The anti-wind pump jet propulsion unit of claim 10, wherein: the cable tube and the lubricant tube pass through the tapered guide tube (240) into the interior of the pump jet (200).
12. The working method of the anti-winding pump spraying propulsion device is characterized in that: using the anti-wind pump jet propulsion unit of claim 5; when in work:
the front guide pipe (140) and the conical guide pipe (240) form circumferential shielding for the rotor (220), so that the rope can only flow from the front part of the front guide pipe (140) in forward sailing and can only flow from the rear part of the conical guide pipe (240) to the pump jet propeller (200) in backward sailing;
when the ship main engine operates and is in forward navigation, the rotor (220) is driven to rotate, the rotor (220) rotates to generate a pumping effect, so that water flows from front to back, and the front free impeller rotates; or when the ship main engine runs and sails backwards, the obtained water flows from back to front, and when the water flows through the rear free impeller, the rear free impeller rotates;
when the ship is in forward sailing, the rope flows to the front free impeller (100) from the front part, and when the ship is in backward sailing, the rope flows to the rear free impeller (300) from the rear part;
the rope is revolved by the front or rear free impeller and gradually slides to a position close to the electric cutting knife under the action of water flow, so that the rope cannot wind the rotor (220); at the moment, the rotor (220) can still rotate to push the ship to sail;
because the rope is wound on the front or rear free impeller, the streamline and the flow of water flow reaching the rotor (220) are changed, so that the navigation speed is changed; and in the reading change of the speed meter, the driver judges that the free impeller is wound, and then the driver starts the front or rear electric cutting knife to cut the rope.
CN202110994372.0A 2021-08-27 2021-08-27 Anti-winding pump spraying propulsion device and working method Pending CN113562150A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202110994372.0A CN113562150A (en) 2021-08-27 2021-08-27 Anti-winding pump spraying propulsion device and working method
NL2031507A NL2031507B1 (en) 2021-08-27 2022-04-05 Anti-twisting pump-jet propulsion device and operating method thereof

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Application Number Priority Date Filing Date Title
CN202110994372.0A CN113562150A (en) 2021-08-27 2021-08-27 Anti-winding pump spraying propulsion device and working method

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CN113562150A true CN113562150A (en) 2021-10-29

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CN202110994372.0A Pending CN113562150A (en) 2021-08-27 2021-08-27 Anti-winding pump spraying propulsion device and working method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111572744B (en) 2020-06-01 2021-03-09 中国船舶科学研究中心 Hydraulic shear device for underwater winding of ship pump jet propeller

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NL2031507A (en) 2022-08-05

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