JPH0441040Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a lubricating device for a bearing device used in a vertical support portion of a rudder stock.

(Prior Art) Conventionally, a rudder stock bearing having a seal that prevents seawater from entering a ship is configured to be lubricated by injecting grease into the sliding part of the rudder stock. There is. For example, the neck bearing of a 1-pintle type marina type rudder, the stuffing box of a G type rudder, the neck bearing of a balanced hanging rudder, etc. Fig. 5 is a side sectional view of the bearing part of the neck bearing of a 1-pintle marina type rudder, in which 1 is the rudder stock, 2 is the bearing, 3 is the cloth packing, and the bearing 2 supports the rudder stock 1 by the stock bushing 4. The structure is such that grease is supplied to the grease inlet 5 by a grease pump linked to the rudder handle.

(Problems to be Solved by the Invention) In the bearing device having the above configuration, the injected grease flows through the rudder stock material and flows out into the open sea.

In recent years, the problem of seawater contamination due to oil has become a hot topic, and oil spills are no longer tolerated. In grease lubrication, in order to prevent grease from flowing out, it is necessary to provide a seal at the bottom of the bearing, but if a seal is provided, it is difficult to circulate the grease and there are problems with lubrication performance.

The present invention provides a bearing device that lubricates a bearing portion with water by forcibly supplying water for bearing lubrication.

(Means for solving the problem) The present invention is configured to perform water lubrication by forcibly supplying water from inside the ship to the bearing sliding part that supports the vertical part of the rudder stock and has a water stop part. This is a water-lubricated bearing device for a rudder stock, characterized in that the discharge pressure of the water is set to a water pressure corresponding to the water depth in a fully loaded stagnant state.

(Function) The sliding parts of the rudder stock may be immersed in seawater or exposed at sea depending on the height of the ship's draft, but the water supplied from the ship's pump has a water pressure corresponding to the ship's draft. , water is constantly supplied to the bearing to lubricate the sliding parts. When the ship is fully loaded, the sliding parts are submerged in seawater, and the pressure of the water being supplied corresponds to the depth of the water when the ship is fully loaded, so the water can flow back due to the water pressure of the open sea. The sliding parts always maintain a lubricated state.

(Example) To explain an example of the present invention using figures, the first example is as follows.
The figure is a side view of the stern of a ship, in which a rudder 7 is supported on a rudder horn 8 on a hull 6 by a rudder stock 1 and a pintle 11. A bearing (neck bearing) 2 is formed in the penetrating portion between the rudder horn 8 and the rudder stock 1. A seawater pipe 12 from a seawater pump (not shown) inside the ship is led to the bearing 2, and a check valve 10 is provided in the middle.

Details of the bearing 2 are shown in FIG. 2 or FIG. 4. In FIG. 2, a cloth packing 3 and a bushing 4 are provided between the bearing 2 and the rudder stock 1, and a seawater pipe 12 is connected. In this way, the seawater pipe 1 is forcibly inserted from inside the ship onto the sliding part of the bearing 2 that supports the vertical part of the rudder stock 1.
The system is configured to supply water via 2. Then, the discharge pressure of the water is set to the water pressure corresponding to the water depth in the full-load stammering state, and the sliding portion of the bearing 2 is always kept in a lubricated state so that the water does not flow back due to the water pressure of the open sea. A bushing gland 13 is provided in the seawater supply section of the bearing 2 section. The seawater pipe 12 communicates with an outer groove 14 of the bush gland 13, which will be described later, via a supply path 12a provided in the bearing 2.

Details of the bush gland 13 are shown in FIG. 3. Figure A is a side view (the right side is a cross section), and Figure B is a plan view (lower half omitted). An outer groove 14 and an inner groove 15, which are annular grooves, are formed on the outer and inner peripheries of the bushing gland 13. Holes 16 connecting the outer groove 14 and the inner groove 15 are provided radially.

FIG. 4 is a side sectional view of an embodiment in which a packing case 17 is used in the sealing part. 2
The supply passage 12a provided in the inner groove 12a communicates with the inner groove 15' via an outer groove 14' and radially provided holes 16'. The seal packing 18 is made of rubber, and the material of the stock bushing 4 is laminated plastic resin. In the figure, 1a indicates a sleeve fitted into the vertical portion of the rudder stock 1.

Next, the operation will be explained. Seawater supplied to the seawater pipe 12 (FIG. 1) is branched from a general-purpose seawater pump inside the ship and introduced. Feed amount is also 20/h ~ 100
A small amount of about /h is sufficient. Note that when the pressure on the seawater discharge side increases, the check valve 10 (Fig. 1) operates to prevent the seawater from flowing backward. On the other hand, when (sea) water for water lubrication is supplied from the pump side, the (sea) water is guided from the sea water pipe 12 through the supply path 12a of the bearing 2 to the outer grooves 14, 14' of the bushing gland 13. It further passes through the holes 16, 16', reaches the inner grooves 15, 15', spreads around the entire circumference of the rudder stock 1, and then passes through the rudder stock 1.
It is discharged downward from between and the stock button 4,
Lubricate the sliding parts. The cloth packing 3 or the seal packing 18 seals to prevent seawater from entering the ship. The stock bushing 4 is preferably made of laminated plastic resin or the like, as it is suitable for water lubrication. Seawater supply path 12a to bushing ground 13 (Figure 2)
may be placed in about two locations.

(Effect of the invention) As understood from the above explanation, the present invention connects the water supply pipe inside the ship to the hull penetration part of the rudder stock or the bearing of the support part and performs water lubrication. There is no chance of grease leaking out and contaminating seawater. Therefore, the present invention can be said to be extremely useful for the Shanghai industry in pollution control measures.

In addition, the pressure of the water supplied for lubrication corresponds to the depth of the water at full load, so the water does not flow backwards due to the water pressure of the open sea, and the sliding parts are always kept lubricated. can.

In addition, this invention supplies water only when it is necessary to supply water to the bearing, and this water can be used by simply branching off the water from the general-purpose pump (general service pump) inside the ship, eliminating the need for a special pump. I don't.

[Brief explanation of the drawing]

Fig. 1 is a side view of the rear part of the hull, and is a drawing explaining an embodiment of the present invention; Fig. 2 is a detailed side view of the bearing section;
Figure 3A is a side view of the bush gland (the right side is a cross section), Figure 3B is a plan view (lower half omitted), Figure 4 is a detailed side view of the bearing section showing another example, and Figure 5 FIG. 2 is a detailed side view of a bearing section showing a conventional embodiment. 1... Stem material, 2... Bearing, 3... Cloth packing, 4... Stock button, 5... Grease supply port, 6... Hull, 7... Rudder, 8... Rudder horn, 9... Rudder Handle, 10... Check valve, 11... Pintle, 12... Sea water pipe, 13... Button gland, 14... Outer groove, 15... Inner groove, 16... Hole,
17...Patsukin case, 18...Seal Patsukin.

Claims (1)

[Scope of utility model registration request] The bearing sliding part that supports the vertical part of the rudder stock,
1. A water-lubricated bearing device for a rudder stock, characterized in that the water lubrication is performed by forcibly supplying water from inside a ship, and the discharge pressure of the water is set to a water pressure corresponding to the water depth in a full-load stuttering state.