A ship resonance icebreaking device

Abstract

This invention relates to a ship resonant icebreaking device, comprising a base, a load-bearing rod, a load-bearing hydraulic rod, an impact wheel, a hatch, a hatch linkage, and a reduction motor. The base is fixed to the ship's deck, and the load-bearing rod is hinged to the base. Both sides of the load-bearing rod are connected to the base via front and rear load-bearing hydraulic rods, respectively. The front end of the load-bearing rod is connected to the impact wheel located at the hatch. The hatch is connected to the reduction motor via a hatch linkage. Based on the natural frequency f1 of the ice layer in the navigation area, the ship's speed is adjusted to achieve an impact frequency f1 generated by the impact wheel. n The impact wheel operates at the same natural frequency f1 as the ice layer, achieving a resonant icebreaking effect. Under the same displacement conditions, this invention can provide a greater impact force to the ice layer. During icebreaking operations, no additional power equipment is required; the impact wheel rotates using the ship's forward speed, thus completing the icebreaking operation with lower energy consumption.

Description

Technical Field

[0001] This invention relates to a ship icebreaking device, and more particularly to a ship resonance icebreaking device. Background Technology

[0002] Currently, traditional icebreakers mainly use gravity-based icebreaking, which relies on the weight of the bow to crush the ice. This method has disadvantages such as large tonnage and high energy consumption (referring to the high energy consumption of propeller propulsion), resulting in low efficiency and limited ice thickness during the icebreaking process. Existing icebreaking devices based on the resonance principle mostly rely on high-power motors to drive the working system to apply a force of a specific frequency to the ice, which is complex in structure and consumes a lot of energy.

[0003] For example, patent publication number CN204713378U discloses a ship icebreaking device, including a main support and an icebreaking blade fixedly connected to the main support. The icebreaking device has a conical icebreaking blade and a toothed blade edge. The icebreaking blade has an arc surface, and ice is broken by the icebreaking blade pressing and impacting the ice layer. A heating layer is provided inside the icebreaking device, which is connected to the ship's internal power supply. This heating layer generates heat during the icebreaking process, making the icebreaking smoother and preventing jamming. Although this icebreaking device has a simple structure, the icebreaking process requires heating, increasing energy consumption.

[0004] For example, the embedded bow icebreaker based on the principle of resonance disclosed in patent publication number CN110539854A mainly consists of three parts: a resonance wheel, a power system, and a position scheduling system. The power of the resonance wheel mainly comes from the geared motor, and additional power is required when it is working. The resonance wheel has a uniformly raised shape and generates a small force.

[0005] For example, patent publication number CN108820145A discloses a frequency-adjustable ship resonance icebreaking device, which includes a power system, a transmission system, and a working system. This invention controls the working frequency of the icebreaker hammer by adjusting the motor speed, making it the same as the natural frequency of the ice layer. Although this icebreaking device can control the working frequency of the icebreaker hammer relatively well, its structure is complex, and it relies on a high-power motor during the icebreaking process, resulting in significant energy consumption.

[0006] To address the aforementioned shortcomings, a novel icebreaking device located at the bow of the ship needs to be designed. This device employs a specially shaped impact wheel structure, which improves icebreaking efficiency and capacity while reducing energy consumption. Summary of the Invention

[0007] This invention proposes a ship resonance icebreaking device for icebreakers. The device has a simple structure and can improve icebreaking capability and efficiency without significantly increasing the weight of the ship.

[0008] To achieve the above objectives, the technical solution of the present invention is: a ship resonance icebreaking device, comprising a base, a load-bearing rod, a load-bearing hydraulic rod, an impact wheel, a hatch, a hatch connecting rod, and a reduction motor. The base is fixed on the ship's deck, and the load-bearing rod is hinged to the base. The two sides of the load-bearing rod are connected to the base through front and rear load-bearing hydraulic rods, respectively. The front end of the load-bearing rod is connected to the impact wheel located at the hatch, and the hatch is connected to the reduction motor through the hatch connecting rod.

[0009] Furthermore, based on the natural frequency f1 of the ice layer in the navigation area, the ship's speed is adjusted to adjust the impact frequency f of the impact wheel. n It is the same as the natural frequency f1 of the ice layer, achieving a resonant ice-breaking effect.

[0010] Furthermore, one end of the hatch linkage is connected to the hatch via a bearing, and the other end is connected to the hull via a bearing.

[0011] Furthermore, the geared motor is connected to the hatch linkage, and the angle of the hatch linkage is controlled by the geared motor to realize the opening and closing of the hatch.

[0012] Furthermore, the base is connected to the front and rear load-bearing hydraulic rods via bearings, and the front and rear load-bearing hydraulic rods are connected to the load-bearing rods via bearings.

[0013] Furthermore, the load-bearing rod and the impact wheel are connected by a bearing.

[0014] Furthermore, the hatch and the hatch linkage are connected by bearings.

[0015] Furthermore, a waterproof baffle is welded onto the load-bearing rod, which fits tightly with the hull to prevent seawater from entering the cabin.

[0016] Furthermore, the impact wheel is provided with a serrated groove to prevent the serrations of the impact wheel from sliding when they come into contact with the ice layer. This allows the impact wheel to rotate under the thrust of the ship, achieving a slow lifting of the hull and a rapid descent to impact the ice layer. Under the same ship tonnage, this applies a greater load to the ice layer.

[0017] Furthermore, the angle of the load-bearing rod is controlled by the front and rear load-bearing hydraulic rods. When icebreaking operations are not being carried out, the load-bearing rod and impact wheel are completely retracted into the cabin, and the hatch is closed.

[0018] The beneficial effects of this invention are:

[0019] 1. Provides greater impact force to ice layers under the same displacement conditions.

[0020] Due to the special shape of the impact wheel, as the ship moves forward, the bow will first slowly rise and then quickly fall to complete an impact. The force provided by the impact will be greater than the static force provided by traditional icebreaking methods (static force mainly refers to the ship's own weight).

[0021] 2. Provide dynamic forces with a specific frequency to the ice layer to make the ice layer resonate and improve ice-breaking efficiency.

[0022] During ship navigation, the impact wheel rotates, providing an impact force with a certain frequency. When the frequency of the applied impact force is comparable to the natural frequency of the ice layer, the ice layer resonates, making it easier to break.

[0023] 3. Compared to some active ice-breaking devices, it consumes less energy.

[0024] Most active icebreaking devices require high-powered power equipment to drive icebreakers and other components to provide sufficient force, resulting in significant energy consumption. This invention, however, eliminates the need for additional power equipment during icebreaking operations. It utilizes the ship's forward speed to rotate the impact wheel, thus completing the icebreaking task with even lower energy consumption. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention and the ship resonance icebreaking device;

[0026] Figure 2 yes Figure 1 View from direction A;

[0027] Figure 3 It is a schematic diagram of the impact wheel;

[0028] Figure 4 This is a schematic diagram of the hatch opening and closing mechanism;

[0029] In the diagram: 1. Hull, 2. Aft load-bearing hydraulic rod, 3. Base, 4. Load-bearing rod, 5. Forward load-bearing hydraulic rod, 6. Waterproof baffle, 7. Waterproof bulkhead, 8. Door linkage, 9. Impact wheel, 10. Gear motor, 11. Door. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0031] Taking a 5000-ton icebreaker as an example, the ice thickness in the icebreaking area is d = 1.5m, and the ice density is ρ = 0.9 × 10⁻⁶. 3 kg / m 3 The ice-breaking contact zone is 6m long and 3m wide. A finite element model of the ice in this navigation area was established using finite element software, and the natural frequency of the ice layer was calculated to be f1 = 1.5Hz.

[0032] like Figures 1 to 4As shown in the figure, a ship resonance icebreaking device proposed in this embodiment of the invention includes a rear load-bearing hydraulic rod 2, a base 3, a load-bearing rod 4, a front load-bearing hydraulic rod 5, a waterproof baffle 6, a hatch door connecting rod 8, an impact wheel 9, a reduction motor 10, and a hatch door 11.

[0033] The base 3 is fixed on the deck of the hull 1. The load-bearing rod 4 is connected to the base 3 through bearings. One end of the rear load-bearing hydraulic rod 2 and the front load-bearing hydraulic rod 5 are connected to the base 3 through bearings, and the other end is connected to the load-bearing rod 4. The rear load-bearing hydraulic rod 2 and the front load-bearing hydraulic rod 5 can control the angle of the load-bearing rod 4. The waterproof baffle 6 is fixed to the load-bearing rod 4 by welding and fits tightly with the hull 7 to prevent seawater from entering the cabin. The impact wheel 9 is connected to the load-bearing rod 4 through bearings. The hatch door connecting rod 8 is connected to the hatch door 11 through bearings, and the other end is connected to the hull 1 through bearings. The geared motor 10 is connected to the hatch door connecting rod 8. The angle of the hatch door connecting rod 8 is controlled by the geared motor 10 to realize the opening and closing of the hatch door 11.

[0034] Based on the natural frequency of the ice layer f1 = 1.5Hz, the circumference of the impact wheel is 2.5m, and the impact wheel completes three impacts on the ice layer for each revolution, when the ship speed is 1.25m / s, the impact frequency f1 is... n =1.5Hz, which is the same as the natural frequency of the ice layer, achieving a resonant ice-breaking effect.

[0035] like Figure 3 As shown, the impact wheel 9 is equipped with serrated grooves to prevent the gears from slipping when in contact with the ice layer. This allows the impact wheel 9 to rotate under the thrust of the ship, achieving a slow lifting of the hull and a rapid descent to impact the ice layer. This applies a greater load to the ice layer for the same ship tonnage.

[0036] The angle of the load-bearing rod 4 is controlled by the load-bearing hydraulic rod. When icebreaking operations are not being carried out, the load-bearing rod 4 and the impact wheel 9 can be completely retracted into the cabin and the hatch 11 can be closed.

[0037] During icebreaking operations, the geared motor 10 first rotates the hatch linkage 8 to open the hatch 11. Then, the load-bearing hydraulic rod 5 shortens and the load-bearing hydraulic rod 2 extends, causing the impact wheel 9 to descend to the height of the ice layer. As the hull 1 moves forward, the impact wheel 9 contacts the ice layer and rotates. At the same time, due to the special shape of the impact wheel 9, the bow is first slowly raised and then quickly lowered to complete one impact, ultimately achieving impact resonance icebreaking.

[0038] After the icebreaking operation is completed, the front load-bearing hydraulic rod 5 extends and the rear load-bearing hydraulic rod 2 shortens, retracting the impact wheel 9 into the hull 1. The hatch door linkage 8 is then rotated by the reduction motor 10 to close the hatch door 11.

Claims

1. A vessel resonance ice breaking device, characterized by: The utility model relates to a ship ice-breaking device, including pedestal, load bar, load hydraulic rod, impact wheel, hatch, hatch connecting rod, speed reducer motor, the pedestal is fixed on the ship deck, and the load bar is hinged on the pedestal, and the load bar both sides are connected with the pedestal through front, rear load hydraulic rod respectively, and the load bar front end is connected with the impact wheel at the hatch, and the hatch is connected with the speed reducer motor through the hatch connecting rod, according to the ice layer inherent frequency of the place where the utility model is arranged , by adjusting the ship speed, so that the impact frequency of impact wheel is same with the ice layer inherent frequency , reaches the resonance ice-breaking effect, the pedestal is connected through bearing between with front, rear load hydraulic rod, and front, rear load hydraulic rod is connected through bearing between with load bar, load bar is connected through bearing between with impact wheel, three protrusions are equipped on the impact wheel, and each protrusion is asymmetric structure on the impact wheel rotation plane, each protrusion of the impact wheel is provided with sawtooth groove, prevents the sawtooth of impact wheel from sliding when contacting with the ice layer, so that the impact wheel rotates under the action of the ship thrust, realizes the slow lifting of the ship body, and the quick drop impact, under the condition that the tonnage of the ship is same, the greater load is applied to the ice layer.

2. A vessel resonance ice breaking arrangement according to claim 1, characterized in that: The cabin door connecting rod is connected with the cabin door through a bearing at one end and connected with the ship body through a bearing at the other end.

3. The vessel resonance ice breaking apparatus of claim 1, wherein: The reduction motor is connected with the cabin door connecting rod, and the angle of the cabin door connecting rod is controlled through the reduction motor to realize the opening and closing of the cabin door.

4. The vessel resonance ice breaking apparatus of claim 1, wherein: The cabin door is connected with the cabin door connecting rod through a bearing.

5. The vessel resonance ice breaking apparatus of claim 1, wherein: The bearing rod is welded with a waterproof baffle, and the waterproof baffle is tightly matched with the waterproof bulkhead to prevent seawater from entering the cabin.

6. The vessel resonance ice breaking apparatus of claim 1, wherein: The angle of the bearing rod is controlled by the front and rear bearing hydraulic rods, and when the icebreaking operation is not performed, the bearing rod and the impact wheel are completely withdrawn into the cabin, and the cabin door is closed.

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