阅读说明：本技术 一种防螺旋桨被绳索缠绕的装置与工作方法 (Device for preventing propeller from being wound by rope and working method ) 是由 刘和炜 于 2021-08-27 设计创作，主要内容包括：本发明涉及一种防螺旋桨被绳索缠绕的装置,包括与螺旋桨同轴设置的自由叶轮,所述自由叶轮的叶片与叶轮轮毂相连,并沿叶轮轮毂周向呈辐射状均布；叶片末端与导管固定连接；所述自由叶轮远离所述螺旋桨的一侧固定设置至少一电动割刀。本发明利用叶轮阻挡绳索,避免了螺旋桨缠绕,设计巧妙；使得绳索在未接触螺旋桨时,即被主动阻止,从而防止螺旋桨被缠绕,并予以切割；前部叶轮形成的反向预旋、后部叶轮形成的能量回收,均有利于提高螺旋桨的工作效率。(The invention relates to a device for preventing a propeller from being wound by a rope, which comprises a free impeller coaxially arranged with the propeller, wherein blades of the free impeller are connected with an impeller hub and are radially and uniformly distributed along the circumferential direction of the impeller hub; the tail ends of the blades are fixedly connected with the guide pipe; and at least one electric cutting knife is fixedly arranged on one side of the free impeller, which is far away from the propeller. The invention utilizes the impeller to block the rope, avoids the winding of the propeller and has ingenious design; when the rope does not contact the propeller, the rope is actively stopped, so that the propeller is prevented from being wound and cut; the reverse prerotation formed by the front impeller and the energy recovery formed by the rear impeller are both beneficial to improving the working efficiency of the propeller.)

1. A device for preventing a propeller from being wound by a rope is characterized in that:

the impeller comprises a free impeller (100) coaxially arranged with a propeller (930), wherein blades (110) of the free impeller (100) are connected with an impeller hub (120) and are radially and uniformly distributed along the circumferential direction of the impeller hub (120);

the tail end of the blade (110) is fixedly connected with the guide pipe (140);

inner blades (141) extending towards the center are uniformly distributed on the inner wall of the guide pipe (140) in the circumferential direction;

at least one electric cutting knife (200) is fixedly arranged on one side of the free impeller (100) far away from the propeller (930).

2. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the impeller hub (120) is fixed on the outer ring of the rolling bearing (130), and the inner ring of the rolling bearing (130) is fixed on the sleeve (150).

3. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the impeller (100) is arranged in front of the propeller (930), the sleeve (150) is fixed on a tail shaft sleeve (910) connected with the ship body (900) through welding or fasteners, and the electric cutter (200) is arranged on the tail shaft sleeve (910).

4. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the impeller (100) is arranged behind the propeller (930), the sleeve (150) is fixed on a shaft of a shaft-provided support (920) connected with the ship body (900) through welding or fasteners, and the electric cutter (200) is arranged on the shaft of the shaft-provided support (920).

5. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the blade (110) is divided into a central blade (111) and an outer blade (112) which are integrated, and the outer end of the outer blade (112) is fixedly connected with the guide pipe (140).

6. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the blades (110) are divided into two parts, namely a split central blade (111) and an outer blade (112), the outer edge of the central blade (111) is fixedly connected with the guide pipe (140), and the outer part of the guide pipe (140) is fixedly connected with the outer blade (112).

7. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the inner blade (141) and the part of the blade (110) in the conduit (140) have the same blade section, and the blade torsion directions of the inner blade (141) and the blade (110) are the same, but the length of the inner blade (141) does not reach the impeller hub (120).

8. An arrangement for protecting a propeller from becoming entangled in ropes as claimed in claim 5 or 6, wherein: the diameter of the whole blade (110) is 1.0-1.5 times of the diameter of the ship propeller (930); a central blade (111) propeller type blade for a marine propeller, the diameter of the blade being 1.0 to 1.2 times the diameter of a marine propeller 930; the outer blades (112) are turbine blades.

9. The apparatus for preventing a propeller from being twisted by a rope according to claim 8, wherein:

when the blade (110) is integrated, a conduit (140) is arranged at the outer edge of the blade (110);

when the blades (110) are split, the guide pipe (140) is arranged at the top edge of the central blade (111), then the outer blades (112) are uniformly arranged in a radial mode along the outer circumferential direction of the guide pipe (140), and the number of the central blade (111) and the number of the outer blades (112) are the same or different.

10. The apparatus for preventing a propeller from being wound by a rope according to claim 7, wherein: the cross section of the conduit (140) is a flat surface, or a universal airfoil section of a vessel turning conduit.

11. An arrangement for protecting a propeller from becoming entangled in ropes as claimed in claim 5 or 6, wherein: the number of blades (111) at the center of the impeller (100) and/or the number of outer blades (112) and the number of blades of the ship propeller (930) have common divisor or no common divisor;

when the impeller (100) is placed in front of the ship propeller (930), the twisting direction of the central blade (111) and the twisting direction of the outer blade (112) are opposite to the twisting direction of the blades of the ship propeller (930), so that under the action of incoming flow, the rotating direction of the impeller (100) is opposite to the rotating direction of the ship propeller (930), the impeller (100) and the ship propeller (930) are in counter-rotation, and the incoming flow in front of the propeller (930) is in reverse pre-rotation;

when the impeller (100) is placed behind the ship propeller (930), the twisting direction of the central blade (111) and the twisting direction of the outer blade (112) are both in the same direction as the blade twisting direction of the ship propeller (930), so that under the action of incoming flow, the rotating direction of the impeller (100) is the same as the rotating direction of the ship propeller (930), and energy in water flow behind the propeller (930) is recovered.

12. The apparatus for preventing a propeller from being wound by a rope according to claim 1, wherein: the rolling bearing is made of engineering plastics with a self-lubricating function; the axis of the electric cutter is parallel to the axis of the tail shaft sleeve, and the cutter is a disc blade.

13. The working method of the device for preventing the propeller from being wound comprises the following steps: means for preventing the propeller from being wound as claimed in claim 7; when in work:

the guide pipe (140) forms circumferential shielding on the propeller (930), so that the rope can only flow to the propeller through the guide pipe, and the rope cannot flow to the propeller from other directions;

when the marine main engine operates, the propeller (930) rotates to generate a pumping action, so that water flows to the propeller (930) through the free impeller (100), and the impeller rotates when the water flows through the impeller (100);

when the impeller is positioned in front of the propeller, the ropes flow from the front to the impeller (100), and when the impeller is positioned behind the propeller, the ropes flow from the rear to the impeller (100); the rope is driven by the impeller (100) to revolve, and the propeller (930) can still rotate to push the ship to sail; however, the streamline of water flow reaching the propeller (930) and the amount of water are changed, so that the navigational speed is changed, the driver can find that the impeller is wound in the change of the reading of the speedometer, and then the electric cutting knife (100) is started to cut the rope.

Technical Field

The invention relates to ship propeller equipment, in particular to a device for preventing a propeller from being wound by a rope 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 existing propeller mostly adopts a mode of cutting the rope of the wound propeller by a cutting knife to remove winding or passively prevent the rope from winding by a rope-proof cover, for example, a patent with publication date of 2017.09.29 and publication number of CN206528607U, namely 'a marine fish net-proof cutting knife', publication date of 2014.11.05 and publication number of CN 203921178U, 'a fishing boat rope-proof cutting knife component', publication date of 2018.08.03 and publication number of CN 207683751U, 'an anti-winding device for the propeller' and the like, do not solve the problem of preventing the rope from winding the propeller, in particular the problem of actively preventing the rope from winding the propeller.

Disclosure of Invention

The object of the present invention is to provide a device for preventing the propeller from being wound so that the rope is actively stopped when it does not contact the propeller, thereby preventing the propeller from being wound and cut.

The invention adopts the following technical scheme:

a device for preventing the propeller from being wound by a rope comprises a free impeller 100 coaxially arranged with a propeller 930, wherein blades 110 of the free impeller 100 are connected with an impeller hub 120 and are radially and uniformly distributed along the circumferential direction of the impeller hub 120; the end of the blade 110 is fixedly connected with the guide pipe 140; the inner wall of the conduit 140 is circumferentially and uniformly distributed with inner blades 141 extending towards the center; at least one electric cutter 200 is fixedly arranged on one side of the free impeller 100 far away from the propeller 930.

Preferably, the impeller hub 120 is fixed to the outer ring of the rolling bearing 130, and the inner ring of the rolling bearing 130 is fixed to the sleeve 150.

Preferably, the impeller 100 is installed in front of the propeller 930, the sleeve 150 is fixed to the stern shaft sleeve 910 connected to the hull 900 by welding or fastening members, and the electric cutter 200 is disposed on the stern shaft sleeve 910.

Preferably, the impeller 100 is disposed behind the propeller 930, the casing 150 is fixed to a shaft of a shaft support 920 coupled to the hull 900 by welding or fastening members, and the electric cutter 200 is disposed on the shaft of the shaft support 920.

Preferably, the vane 110 is divided into two parts, namely a central vane 111 and an outer vane 112, which are integrated, and the outer end of the outer vane 112 is fixedly connected with the conduit 140.

Preferably, the blades 110 are divided into two parts, namely a split central blade 111 and an outer blade 112, the outer edge of the central blade 111 is fixedly connected with the guide pipe 140, and the outer part of the guide pipe 140 is fixedly connected with the outer blade 112.

Preferably, the inner blade 141 and the portion of the blade 110 located in the conduit 140 have the same blade section, and the blade twisting directions of the inner blade 141 and the blade 110 are the same, but the length of the inner blade 141 does not reach the impeller hub 120.

Further, the diameter of the whole blade 110 is 1.0 to 1.5 times of the diameter of the marine propeller 930; a center blade 111 propeller blade of a marine propeller type having a diameter 1.0 to 1.2 times the diameter of a marine propeller 930; the outer blades 112 are turbine blades.

Further, when the blade 110 is a single body, the guide tube 140 is disposed at the outer edge of the blade 110; when the blades 110 are split, the duct 140 is disposed at the top edge of the central blade 111, and then the outer blades 112 are uniformly and radially disposed along the outer circumference of the duct 140, and the number of the central blade 111 and the number of the outer blades 112 are the same or different.

Still further, the cross-section of the conduit 140 is a flat surface, or a universal airfoil cross-section of a vessel turning conduit.

Still further, there is a common divisor or no common divisor between the number of blades 111 in the center of the impeller 100 and/or the number of outer blades 112 and the number of blades of the ship propeller 930; when the impeller 100 is placed in front of the ship propeller 930, the twisting direction of the central blade 111 and the twisting direction of the outer blades 112 are opposite to the blade twisting direction of the ship propeller 930, so that under the action of incoming flow, the rotating direction of the impeller 100 is opposite to the rotating direction of the ship propeller 930, the impeller 100 and the ship propeller 930 are in counter-rotation, and the incoming flow in front of the propeller 930 is in reverse pre-rotation; when the impeller 100 is placed behind the ship propeller 930, the twisting direction of the central blades 111 and the twisting direction of the outer blades 112 are both in the same direction as the blade twisting direction of the ship propeller 930, so that the rotation direction of the impeller 100 is the same as the rotation direction of the ship propeller 930 by the incoming flow, and the energy in the water flow behind the propeller 930 is recovered.

Preferably, the rolling bearing is made of engineering plastics with a self-lubricating function; the axis of the electric cutter is parallel to the axis of the tail shaft sleeve, and the cutter is a disc blade.

The working method of the device for preventing the propeller from being wound comprises the following steps: the device for preventing the propeller from being wound is adopted; when in work: the guide pipe 140 forms circumferential shielding for the propeller 930, so that the rope can only flow to the propeller through the guide pipe, and the rope cannot flow into the propeller from other directions; when the marine main engine is operated, the propeller 930 is rotated to generate a pumping action, so that water flows toward the propeller 930 through the free impeller 100, and the impeller is rotated when the water flows through the impeller 100; when the impeller is positioned in front of the propeller, the ropes flow from the front to the impeller 100, and when the impeller is positioned behind the propeller, the ropes flow from the rear to the impeller 100; the rope is driven by the impeller 100 to revolve, and the propeller 930 can still rotate to push the ship to sail; however, the streamline of water flow and the amount of water reaching the propeller 930 are changed, which results in the change of the navigational speed, and the driver can find that the impeller is wound in the change of the reading of the speedometer, and then the electric cutter 100 is started to cut the rope.

The invention has the beneficial effects that:

1) utilize the impeller to block the rope, avoided the screw winding, design benefit.

2) So that the ropes are actively stopped when they do not contact the propeller, thereby preventing the propeller from being wound and cut.

3) The reverse prerotation formed by the front impeller and the energy recovery formed by the rear impeller are both beneficial to improving the working efficiency of the propeller.

Drawings

Fig. 1 is a schematic view showing the general arrangement of a device for preventing a propeller from being wound in the first embodiment (an impeller is arranged in front of the propeller, and a wave line shows a duct for uncovering the front half of the device).

Fig. 2 is a schematic view showing the general arrangement of a device for preventing a propeller from being wound according to the second embodiment (an impeller is arranged behind the propeller, and a wave line shows a duct for uncovering the front half of the device).

Fig. 3 is a sectional view of the impeller with integrated blades.

Fig. 4 is a sectional view of the impeller with split blades.

In the figure, 900, hull, 910, tail shaft sleeve, 920, shaft support, 930, propeller, 100, free impeller, 110, blade, 111, center blade, 112, outer blade, 120, free impeller hub, 130, free impeller rolling bearing, 140, duct, 141, inner blade, 150, sleeve, 200, 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, 3-4, a device for preventing propeller from being wound, wherein blades 110 are connected with an impeller hub 120 and radially and uniformly distributed along the circumference of the impeller hub 120, the impeller hub 120 is fixed on the outer ring of a rolling bearing 130, the inner ring of the rolling bearing 130 is fixed on a sleeve 150, the blades 110 can be provided with a guide pipe 140, and internal blades 141 are fixedly connected with the guide pipe 140 and uniformly distributed along the circumference of the guide pipe 140, but the length of the internal blades cannot reach the hub 120; the above components constitute the impeller 100.

Referring to fig. 1, in the present embodiment, when the wheel 100 is installed in front of the ship propeller 930 (the place far from the stern is the front, hereinafter, the same), the sleeve 150 may be fixed on the stern shaft sleeve 910 connected to the ship body 900 by welding or fastening members, and the electric cutter 200 is disposed on the stern shaft sleeve 910;

further, the blade 110 of the impeller is divided into a central blade 111 and an outer blade 112, which may be one-piece (as shown in fig. 3) or split (as shown in fig. 4), and the diameter of the whole blade 110 is 1.0-1.5 times that of the marine propeller 930; the central blade 111 is a propeller blade of a marine propeller, and the diameter of the blade is 1.0 to 1.2 times of that of the marine propeller 930; the outer blades 112 are turbine blades.

Referring to fig. 3, when the blade 110 is a single body, a guide tube 140 is provided at the outer edge of the blade 110.

Referring to fig. 4, when the blades 110 are split, the duct 140 is disposed at the top edge of the central blade 111, and then the outer blades 112 are uniformly and radially disposed along the outer circumference of the duct 140, and the number of the central blade 111 and the number of the outer blades 112 may be the same or different; the conduit 140 is supported by the top edge of the blade it houses;

the duct 140 can shield the ship propeller 930 to prevent the rope from flowing into the gap between the impeller 100 and the ship propeller 930; the cross-section of the duct 140 may be a straight surface or a universal airfoil profile of a vessel turning duct.

The number of blades 111 in the center of the impeller 100 and/or the number of outer blades 112 may or may not have a common divisor with the number of blades of the ship propeller 930.

Referring to fig. 1, the impeller 100 is disposed in front of the ship propeller 930, and the twisting direction of the central blade 111 and the twisting direction of the outer blades 112 are opposite to the twisting direction of the ship propeller 930 (i.e. the twisting tendency is opposite, but the absolute values of the respective twisting angles may be the same or different, hereinafter, "opposite direction" is referred to as "opposite direction"), so that under the action of incoming flow, the rotating direction of the impeller 100 is opposite to the rotating direction of the ship propeller 930, and the impeller 100 and the ship propeller 930 form a counter-rotation, so that the incoming flow in front of the propeller 930 forms a reverse pre-rotation.

In this embodiment, the rolling bearing is preferably made of engineering plastics with self-lubricating function.

In the embodiment, the axis of the electric cutter is parallel to the axis of the tail shaft sleeve, and the cutter is a disc blade.

The basic principle of the invention is as follows: the use of a free-spinning impeller encounters the cable before the propeller and winds the cable, preventing the cable from flowing to the propeller, thereby preventing the cable from winding around the propeller.

When the device for preventing the propeller from being wound works:

first, the duct 140 forms a circumferential shield for the propeller 930 so that the rope can only flow from the front of the duct (as in fig. 1) to the propeller, which first ensures that the rope cannot flow into the propeller from other directions, reducing the probability of the rope wrapping around the propeller 930.

Next, when the marine main unit is operated, the propeller 930 is rotated to generate a pumping action, so that water flows from front to rear, and the impeller is rotated as the water flows through the impeller 100. The rope flows from the front to the impeller 100, and the rope is rotated by the impeller 100, so that the propeller 930 cannot be unwound. The propeller 930 may still be rotated to propel the vessel through the sea. When the rope is wound on the free impeller 100, the water flow line and the water amount reaching the propeller 930 are changed, so that the navigational speed is changed, the driver can find that the impeller is wound in the change of the reading of the speedometer, and then the electric cutting knife 100 is started to cut the rope.

When not in work: and closing the electric cutter.

Example two:

the difference between the first embodiment and the second embodiment is that, referring to fig. 2, when the impeller 100 is placed behind the ship propeller 930 (the position near the stern is the rear, hereinafter, the same is applied), the sleeve 150 may be fixed to the shaft of the shaft support 920 connected to the ship body 900 by welding or fastening members, and the electric cutter 200 is disposed on the shaft of the shaft support 920.

When the impeller 100 is placed behind the ship propeller 930, the twisting direction of the central blade 111 and the twisting direction of the outer blade 112 are both the same as the blade twisting direction of the ship propeller 930 (i.e. the twisting trends are the same, but the respective twisting angles may be the same or different, hereinafter "same direction" is intended), so that under the action of incoming flow, the rotating direction of the impeller 100 is the same as the rotating direction of the ship propeller 930, and the energy in the water flow behind the propeller 930 is recovered;

first, the duct 140 forms a circumferential shield for the propeller 930 so that the rope can only flow from the rear of the duct to the propeller, which first ensures that the rope cannot flow into the propeller from other directions, reducing the probability of the rope wrapping around the propeller 930.

Next, when the marine main unit is operated, the propeller 930 is rotated to generate a pumping action, so that water flows from the rear to the front, and the impeller is rotated as the water flows through the impeller 100. Referring to fig. 2, the rope flows from the rear to the impeller 100. The rope is revolved by the impeller 100 so that it cannot be unwound from the propeller 930. The propeller 930 may still be rotated to propel the vessel through the sea. When the rope is wound on the free impeller 100, the water flow line and the water amount reaching the propeller 930 are changed, so that the navigational speed is changed, the driver can find that the impeller is wound in the change of the reading of the speedometer, and then the electric cutting knife 100 is started to cut the rope.

When not in work: and closing the electric cutter.

The rest is the same as the first embodiment.

The above are two preferred embodiments of the present invention, and those skilled in the art can make various changes or modifications based on the above description, which are within the scope of the present invention as claimed.