KR20060036353A - Vessel shaft waterproof device - Google Patents

Abstract

The present invention relates to a marine shaft waterproofing device for ships, and more particularly, to prevent the inflow of seawater by improving the structure of the waterproofing device, and to increase the durability by significantly reducing the wear of the shaft by absorbing the impact applied to the shaft. At the same time, the present invention relates to a marine shaft waterproofing device capable of preventing the discharge of oil spilled on the engine compartment floor.

That is, the ship shaft waterproof formed on the shaft 5 of the through hole 2 formed in the partition wall of the hull 1 and the inside of the through hole is coupled to the engine 3, the other side is coupled to the propeller 4 In the apparatus, a cylindrical needle bearing (6) is formed in the through hole (2) in the inlet and the outer end of the through hole (2), the bellows (7) having an elastic force at the end of the through hole (2) To form a sliding pad (8) formed with an inlet (8a) for injecting cooling water to the other end of the bellows (7) and forcibly fastening both ends of the bellows with a fastening band (9), the sliding pad (8) The sliding bearing 10 is fixed on the shaft to be interviewed with a bolt 11 to maintain concentricity when the shaft 5 is rotated by the sliding bearing 10 inside the through hole 2 and the sliding bearing 10. Do not let the coolant pass through the inlet (8a) formed in (10) The sliding bearing 10 and the sliding pad 8 are joined to each other by the elastic force of the bellows 7, which is compressed by compressing at the end of the through hole 2 and the end of the sliding bearing 10 to minimize frictional heat. Since it is possible to obtain a complete waterproof and increase in durability, and does not throw out the water separately to provide an environmentally friendly ship shaft waterproofing device.

Marine Shaft Seals, Seals, Bellows, Through Holes

Description

Vessel shaft waterproof device

1 is a cross-sectional view showing an embodiment of the present invention

2 is a perspective view of main parts of the present invention;

3 is an enlarged cross-sectional view of the A-A line.

Figure 4 is a perspective view cut away the main part of the present invention

■ Explanation of symbols used in main part of drawing ■

1: hull 2: through hole

3: engine 4: propeller

5: Shaft 6: Cylindrical needle bearing 6a: Groove

7: bellows 8: sliding pad 8a: inlet

9: Fastening strap 10: Slip bearing

11: Bolt

The present invention relates to a watertight device for a ship shaft, and more particularly, to prevent the inflow of seawater by improving the structure of the watertight device, and to increase the durability by significantly reducing the wear of the shaft by absorbing the impact applied to the shaft. It relates to a marine shaft waterproofing device that can prevent the leakage of oil, such as when the.

In general, a ship obtains propulsion by transmitting power generated from an engine mounted therein to a propulsion device such as a propeller by a shaft. The shaft is connected to an engine whose one side is mounted inside the ship, and the other side is connected to a propeller located outside the ship. Since the shaft is projected out of the ship through the hull, it is necessary to prevent the inflow of seawater into the gap between the shaft and the hull. In the past, a number of ship shaft waterproof devices have been developed, but an unsealed measure of filling the hull and the shaft with an oil seal or the like has been used. Therefore, in the conventional waterproofing device, the seawater is introduced into the ship little by little. And although the shaft is cylindrical, it is virtually impossible to maintain concentricity of 100%. As a result, the vibration generated during rotation causes the shaft and the part of the oil seal that surrounds the shaft to wear more severely due to the high temperature and severe frictional force, which gradually increases the amount of seawater flowing into the ship. It may sink to a point where it sinks, and to prevent this, water is pumped out by jumping. At this time, the oil spilled on the floor of the engine room is dumped together in the sea, so the problem of environmental pollution is to continue to take a vicious cycle.

In addition, due to severe wear, the work should be done to replace the oil seal, but the work also takes a lot of time and expense has caused a problem that the economic burden of the captain, fishermen operating the vessel increases.

Therefore, the present invention is equipped with a sliding bearing on the shaft in order to solve the above-mentioned problems and by coupling the bellows of the elastic body to the sliding bearing, the bellows absorbs the vibration occurring in the shaft at the same time as the original leakage of the sea water at the same time concentricity By maintaining the frictional force and friction heat at the same time to maintain the increase in durability as well as the cost of repair and repair to provide a very useful marine shaft waterproofing device for fishermen.

1 is a cross-sectional view showing an embodiment of the present invention,

2 is a perspective view of the main portion of the present invention,

3 is an enlarged cross-sectional view taken along line A-A,

4 is a perspective view showing a cutaway section of the main portion of the present invention;

Hereinafter, the configuration of the present invention will be described.

The through hole 2 formed in the partition wall of the hull 1 and into the through hole, one side is coupled to the engine 3, the other side to the ship shaft waterproofing device formed on the shaft 5 to which the propeller 4 is coupled In the through-hole 2, a cylindrical needle bearing 6 is installed in and in contact with the through-hole and external to the shaft 5, and a bellows 7 having an elastic force is coupled to the end of the through-hole 2. And a sliding pad 8 having an injection hole 8a formed therein for injecting cooling water into the other end of the bellows 7 and forcibly fastening both ends of the bellows with a fastening band 9, and interviewing the sliding pad 8. The sliding bearing 10 is formed on the shaft so as to be fixedly fastened with the bolts 11.

Referring to the fastening method and the operating state of the marine shaft waterproofing device configured as described above is as follows.

First, the cylindrical needle bearing 6 inside and in contact with the through hole and in and around the shaft 5 is inserted in the through hole 2 and the shaft is fitted to maintain concentricity when the shaft rotates. The cylindrical needle bearing 6 The groove (6a) formed in the serves to minimize the friction and prevent the friction heat by allowing the coolant to pass through. Next, insert the bellows (7), the sliding pad (8) and the sliding bearing (10) in the shaft (5) in turn, and fasten one side of the bellows with through holes and fastening bands (9), and the other side with the sliding pad. It is fixed by a fastening band. Finally, the sliding bearing 10 is fixed to the shaft with a bolt 11, at which time the sliding pad is fixed by pushing the sliding pad 2,3 cm toward the bellows. As a result, the sliding bearing and the sliding pad are opposed by the elastic force of the bellows to have a watertight structure. Only the sliding bearing is rotated by the rotation of the shaft, and the sliding pad is fixed to generate frictional heat. However, the sliding bearing is made of carbon material to almost dissipate frictional heat, and inlet 8a is formed at one side to cool down the cooling water. Let it flow. The coolant is to fall into the propeller toward the groove inside the cylindrical needle bearing (6) to eliminate wear, frictional heat noise, etc. to provide a durable and environmentally friendly marine shaft waterproofing device.

The effect of the marine shaft waterproofing device configured as described above is to maintain the concentricity when the shaft is rotated by the cylindrical needle bearing (6) inside the through hole and the cooling water is passed through the groove (6a) formed in the cylindrical needle bearing (6) Minimizes friction, prevents frictional heat, and compresses at the end of through-hole and the end of sliding bearing (10). The sliding bearing and sliding pad (8) are joined to each other by the elastic force of the bellows connected. It is possible to obtain an increase in durability and to provide an eco-friendly marine shaft waterproofing device because water is not discarded outboard.

Claims (1)

Through hole (2) wave formed in the bulkhead of the hull (1) Inside the through hole, one side is coupled to the engine (3), the other side to the ship shaft waterproofing device formed on the shaft (5) to which the propeller (4) is coupled In the through-hole 2, a cylindrical needle bearing 6 is installed in and in contact with the through-hole and external to the shaft 5, and a bellows 7 having an elastic force is coupled to the end of the through-hole 2. And a sliding pad 8 having an injection hole 8a formed therein for injecting cooling water into the other end of the bellows 7 and forcibly fastening both ends of the bellows with a fastening band 9, and interviewing the sliding pad 8. Ship shaft waterproofing device, characterized in that the fastening the sliding bearing 10 on the shaft with a bolt (11).

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