CN113548167A

CN113548167A - Grid for preventing side thruster from being wound and working method

Info

Publication number: CN113548167A
Application number: CN202110994371.6A
Authority: CN
Inventors: 刘和炜
Original assignee: Fishery Machinery and Instrument Research Institute of CAFS
Current assignee: Fishery Machinery and Instrument Research Institute of CAFS
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2021-10-26
Also published as: NL2031377A

Abstract

The invention relates to a grating for preventing a side thruster from being wound, which comprises a bracket with a shaft and an impeller; the support with the shaft is provided with a plurality of support blades which are radially and uniformly arranged from the shaft to the outside, the top edge of each support blade is provided with a circle of barrier strip, and the support with the shaft is arranged at the openings at the two ends of the pipeline through fasteners by virtue of the barrier strips to form a fixed grid; the impeller comprises blades and an impeller hub, and the blades are uniformly distributed in a radial shape along the circumferential direction of the impeller hub until the blades are connected with the rim; the inner wall of the wheel rim is inwards provided with short blades which are uniformly distributed along the wheel rim in a radial shape, the impeller hub is fixed on the outer ring of the rolling bearing, and the inner ring of the rolling bearing is fixed on the sleeve; the sleeve is fixed on the shaft of the shaft-bearing support through welding or fasteners to form a movable grid; the belt shaft bracket is closer to the side thruster propeller than the impeller on the belt shaft bracket; the shaft bracket is provided with at least one electric cutting knife, and the axis of the electric cutting knife is parallel to the shaft of the shaft bracket.

Description

Grid for preventing side thruster from being wound and working method

Technical Field

The invention relates to ship equipment, in particular to a grating for preventing a side thruster from being wound and a working method, and belongs to the technical field of ship control.

Background

When a ship sails in a fishing area or a marine culture area, a working bow thrust often sucks a rope, so that a propeller of a side thruster is wound, the propeller of the side thruster stops rotating, and personnel is needed to go underwater for maintenance, which is even inconvenient.

The side thruster is generally arranged in a pipeline transversely penetrating through the ship body, and detachable grids are arranged at two ends of the pipeline. Because of the need for water to flow into the duct from overboard for the side thruster propellers to suck and spray, the clearance of the grating tends to be large to ensure sufficient water flow out into the duct. The grille is therefore generally effective in preventing large solids from being drawn into the duct, but it is difficult to prevent the flexible cord from being drawn into the duct and thereby wound around the propeller of the side thruster.

Disclosure of Invention

The invention aims to provide a grid with impellers for preventing a side thruster from being wound, so that a rope is blocked at the inlet of a pipeline and rotates along with the impellers, a propeller is prevented from being wound by the rope, and the impellers wound by the rope can influence the motion parameters of the propeller, so that an alarm early warning is given.

The invention adopts the following technical scheme:

a grating for preventing a side thruster from being wound comprises a bracket 200 with a shaft, an impeller 100; the shaft-bearing supports 200 are provided with a pair of shafts and coaxially fixed on the pipelines 900 at two sides of the side thruster propeller 910; the support 200 with the shaft is provided with a plurality of support blades 210 which are uniformly arranged in a radial shape from the shaft to the outside, a circle of barrier strips 220 are arranged at the top edges of the support blades 210, and the support 200 with the shaft is arranged at openings at two ends of the pipeline 900 through fasteners by means of the barrier strips 220 to form a fixed grid; the impeller 100 comprises blades 110 and an impeller hub 120, wherein the blades 110 are radially and uniformly distributed along the circumferential direction of the impeller hub 120 until being connected with a rim 140; the inner wall of the rim 140 is further inwardly provided with short blades 141, the short blades 141 are uniformly distributed along the rim 140 in a radial direction, 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; the sleeve 150 is fixed on the shaft of the support 200 with the shaft through welding or fasteners to form a movable grid; the shaft support 200 is closer to the side thruster propeller 910 than the impeller 100 thereon; the support 200 with the shaft is provided with at least one electric cutter 160, and the axis of the electric cutter 160 is parallel to the shaft of the support 200 with the shaft.

Preferably, the impeller 100 is located inside the pipe 900 with a clearance from the inner wall of the pipe 900 smaller than the outer diameter of the rope.

Preferably, the blades 110 and the bracket blades 210 both adopt turbine blades, and the twisting directions of the blades and the bracket blades are the same; taking the forward rotation of the side thruster propeller 910 as a reference, the twisting direction of the support blades 210 and the blades 110 at the inflow end of the pipeline 900 is different from the twisting direction of the blades of the side thruster propeller 900, so that the incoming water flow in front of the side thruster propeller 900 has reverse prerotation; the twisting direction of the

support blades

210 and 110 at the flow-off end of the pipeline 900 is the same as the twisting direction of the blades of the side thruster propeller 910, so that the

support blades

210 and 110 at the flow-off end can recover the energy in the water flow coming out from the rear of the side thruster propeller 910.

Further, the short blade 141 and the blade 110 of the impeller where it is located have the same blade section, and the blade twisting directions of the two are the same, but the length of the blade 141 does not reach the impeller hub 120.

Further, the number of the bracket blades 210 is the same as the number of the blades 110.

Further, the number of the bracket blades 210 is different from that of the blades 110.

Furthermore, the rolling bearing is made of engineering plastics with a self-lubricating function; the electric cutter adopts a disc blade.

Further, a cable pipe for supplying power to the electric cutter and a lubricating oil pipe for supplying oil to the rolling bearing are passed through the pipeline 900 from the hull to be disposed along the support 200 with the shaft to the corresponding electric and oil equipments.

A working method of a grating for preventing a side thruster from being wound adopts the grating for preventing the side thruster from being wound;

when in work: when the side thruster propeller (910) runs, a pumping action is generated, so that water flow flows from the pipeline inflow opening to the de-flow opening, and when the water flow flows through the impeller (100), the impeller rotates; the impeller (100) which rotates freely meets the ropes before the side thruster propeller (910) and winds the ropes, so that the ropes are prevented from flowing to the side thruster propeller (910), and meanwhile, the fixed grid plays a role in blocking; the side thruster propeller (910) can still rotate, but because the impeller (100) is wound, the flow rate of the inflow pipeline (900) is reduced, and the side thrust is reduced; when the reading of the instrument in the cab changes, the winding of the rope is determined, the electric cutting knife (160) is automatically or manually opened, and the rope is cut;

when not in work: the electric cutter is closed.

The invention has the beneficial effects that:

1) the design is ingenious, firstly utilizes the impeller to block the rope, secondly utilizes the belt shaft support to block, has avoided the screw winding.

2) The rope can be prevented from winding during forward and backward sailing.

3) The reverse prerotation formed by the inflow port impeller and the shaft-containing support and the energy recovery formed by the outflow port impeller and the shaft-containing support are both beneficial to improving the working efficiency of the propeller.

Drawings

FIG. 1 is a partial perspective view of a grid for preventing a sidestep from being entangled within a pipeline of a marine vessel sidestep (the wavy line in the figure indicates the pipeline on the opposite half of the ripper).

Fig. 2 is a cut-away schematic view of a stent with a shaft.

Figure 3 is a schematic view of a cutaway of an impeller.

In the figure, 900 is a pipeline, 910 is a side thruster propeller, 100 is an impeller, 110 is impeller blades, 120 is an impeller hub, 130 is an impeller rolling bearing, 140 is a wheel rim, 150 is an impeller sleeve, 160 is an electric cutting knife, 200 is a bracket with a shaft, 210 is bracket blades, and 220 is a barrier strip.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1-3, a grid for preventing a side thruster from being wound is divided into an impeller 100 and a support 200 with a shaft, blades 110 of the impeller are connected with an impeller hub 120 and radially and uniformly distributed along the circumference of the impeller hub 120 until being connected with a rim 140, short blades 141 are radially and uniformly distributed along the rim 140, the impeller hub 120 is fixed on the outer ring of a rolling bearing 130, and the inner ring of the rolling bearing 130 is fixed on a sleeve 150; the sleeve 150 may be fixed on the shaft of the belt shaft bracket 200 by welding or fastening members, and is a movable grid;

the support 200 with the shaft is provided with a plurality of turbine type blades 210 which are radial from the shaft to the outside and are uniformly arranged, the top edge of each blade 210 is provided with a circle of barrier strips 220, and the support 200 with the shaft is arranged at openings at two ends of the pipeline 900 through fasteners by means of the barrier strips 220 and is a fixed grid;

the shaft support 200 is closer to the blades of the bow thrusting propeller 910 than the impeller 100 thereon, and the impeller 100 is located inside the duct 900; an electric cutter 160 is provided on the shaft of the shaft holder 200, and the axis of the cutter is parallel to the shaft of the shaft holder 200.

In this embodiment, there may or may not be a common divisor between the number of blades 110 and the number of side thruster propellers 910; the blades 110 are turbine blades, the twisting direction of the blades 110 is the same as the twisting direction of the blades 210 of the shaft-bearing bracket 200 sleeved with the blades 110 (i.e. the twisting tendency is the same, but the respective twisting angles may be the same or different, and the same direction is used hereinafter), based on the forward rotation of the side thruster propeller 910, the twisting directions of the

blades

210 and 110 at the inflow end of the pipeline 900 are opposite to the twisting direction of the blades of the side thruster propeller 900 (i.e. the twisting trends are opposite, but the absolute values of the twisting angles may be the same or different, and hereinafter, "opposite directions" is used for this purpose), so that the incoming water flow in front of the side thruster propeller 900 has reverse pre-rotation, the twisting direction of the

blades

210 and 110 at the flow-off end of the pipeline 900 is the same as that of the side thruster propeller 900, so that the

blades

210 and 110 at the upstream end can recover energy from the water stream exiting behind the propeller 930.

In this embodiment, the short blade 141 and the blade 110 of the impeller have the same blade section, but the blade torsion directions of the two blades are the same, but the length of the blade 141 does not reach the impeller hub 120.

In this embodiment, the number of blades 210 and blades 110 may be the same or different.

In this embodiment, the rolling bearing is preferably made of engineering plastics with self-lubricating function. The electric cutter adopts a disc blade. A cable pipe for supplying power to the electric cutter and a lubricating oil pipe for supplying oil to the rolling bearing may be passed through the pipe 900 from the hull to the corresponding equipment along the spool support 200.

The basic principle of the invention is as follows: the free-rotating impeller meets the ropes before the side thruster propeller and winds the ropes, so that the ropes are prevented from flowing to the side thruster propeller, the ropes are prevented from winding the side thruster propeller, and meanwhile, the fixed grids also play a certain blocking role.

When in work: the side thrusters 910, when operated, create a pumping action that causes water to flow from the inlet to the outlet of the pipe, and the impeller rotates as it flows through the impeller 100. The rope is revolved by the impeller 100 so that it cannot be unwound from the propeller 910. The propeller 910 may still rotate. Since the impeller 100 is wound, the flow rate of the inflow pipe 900 is reduced and the side thrust is reduced. The operator can determine from the cab instrument that there is a rope winding based on the change in the relevant readings, and activate the motorized cutter 160 to cut the rope.

While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A grid that side pusher was twined is prevented to its characterized in that:

comprises a bracket (200) with a shaft and an impeller (100);

the pair of the bracket (200) with the shaft is coaxially fixed on the pipelines (900) at two sides of the side thruster propeller (910); the shaft-mounted support (200) is provided with a plurality of support blades (210) which are uniformly arranged from the shaft to the outside in a radial mode, a circle of barrier strips (220) are arranged at the top edges of the support blades (210), and the shaft-mounted support (200) is mounted at openings at two ends of the pipeline (900) through fasteners by means of the barrier strips (220) to form a fixed grid;

the impeller (100) comprises blades (110) and an impeller hub (120), wherein the blades (110) are uniformly distributed in a radial shape along the circumferential direction of the impeller hub (120) until the blades are connected with a rim (140); the inner wall of the rim (140) is inwards provided with short blades (141), the short blades (141) are uniformly distributed along the rim (140) in a radial shape, 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); the sleeve (150) is fixed on the shaft of the bracket (200) with the shaft through welding or fasteners to form a movable grid;

the shaft support (200) being closer to the side thruster propeller (910) than the impeller (100) thereon;

the belt shaft support (200) is provided with at least one electric cutting knife (160), and the axis of the electric cutting knife (160) is parallel to the shaft of the belt shaft support (200).

2. The grid around which an anti-sidekick apparatus is wound of claim 1, wherein: the impeller (100) is located inside the pipe (900) with a clearance from the inner wall of the pipe (900) that is smaller than the outer diameter of the rope.

3. The grid around which an anti-sidekick apparatus is wound of claim 1, wherein:

the blades (110) and the bracket blades (210) are turbine blades, and the twisting directions of the blades and the bracket blades are the same;

by taking the forward rotation of the side thruster propeller (910) as a reference, the twisting direction of the bracket blade (210) and the blade (110) at the inflow end of the pipeline (900) is opposite to the twisting direction of the blade of the side thruster propeller (900), so that the incoming water flow in front of the side thruster propeller (900) has reverse prerotation;

the twisting direction of the bracket blades (210) and the blades (110) at the flow-removing end of the pipeline (900) is the same as that of the blades of the side thruster propeller (910), so that the bracket blades (210) and the blades (110) at the flow-removing end can recover the energy in the water flow coming out from the rear part of the side thruster propeller (910).

4. The grid around which an anti-sidekick apparatus is wound of claim 3, wherein: the short blade (141) and the blade (110) of the impeller where the short blade is located are not only the same in blade section, but also the twisting directions of the short blade and the blade are the same, but the length of the blade (141) does not reach the impeller hub (120).

5. The grid around which an anti-sidekick apparatus is wound of claim 3, wherein: the number of the bracket blades (210) is the same as that of the blades (110).

6. The grid around which an anti-sidekick apparatus is wound of claim 3, wherein: the number of the bracket blades (210) is different from that of the blades (110).

7. The grid around which an anti-sidekick apparatus is wound of claim 3, wherein: the rolling bearing is made of engineering plastics with a self-lubricating function; the electric cutter adopts a disc blade.

8. The grid around which an anti-sidekick apparatus is wound of claim 3, wherein: the cable pipe for supplying power to the electric cutting knife and the lubricating oil pipe for supplying oil to the rolling bearing penetrate through the pipeline (900) from the ship body and are arranged to the corresponding electric and oil utilization equipment along the support (200) with the shaft.

9. A working method of a grating for preventing a lateral thruster from being wound is characterized in that:

a grid wound with the anti-sidekick apparatus of any one of claims 1-8;

when in work: when the side thruster propeller (910) runs, a pumping action is generated, so that water flow flows from the pipeline inflow opening to the de-flow opening, and when the water flow flows through the impeller (100), the impeller rotates; the impeller (100) which rotates freely meets the ropes before the side thruster propeller (910) and winds the ropes, so that the ropes are prevented from flowing to the side thruster propeller (910), and meanwhile, the fixed grid plays a role in blocking;

the side thruster propeller (910) can still rotate, but because the impeller (100) is wound, the flow rate of the inflow pipeline (900) is reduced, and the side thrust is reduced;

when the reading of the instrument in the cab changes, the winding of the rope is determined, the electric cutting knife (160) is automatically or manually opened, and the rope is cut;

when not in work: the electric cutter is closed.