JP2002122125A - Device for sealing driving shaft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of effectively preventing the corrosion at 100% in a clearance between an inside sleeve and a driving shaft, and capable of adjusting the inside sleeve underwater. SOLUTION: An inside sleeve 7 is provided so as to seal a driving shaft 1 and so as to guide and support the driving shaft 1. The inside sleeve is guided and supported by an outside sleeve, and formed with the inner diameter larger than the outer diameter of the driving shaft. The inside sleeve has at least one oil or lubricating oil supply pipeline 17, and this pipeline is provided with at least one outlet opening 18 in the inside surface area of the inside sleeve, and connected to an oil or lubricating oil supply device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for sealing a drive shaft, comprising an inner sleeve for supporting the drive shaft, the inner sleeve being supported by the outer sleeve, and having an outer diameter smaller than the outer diameter of the drive shaft. Also relates to a device formed to have a large inner diameter.

[0002]

2. Description of the Related Art Such devices are used to guide the drive shaft of a ship into the area of its bushing which penetrates the hull wall and to ensure a sufficient sealing function. In a typical construction, the outer sleeve is screwed to the hull structure and the outer sleeve holds a ring-shaped packing element, which seals the outer sleeve to the inner sleeve. Is realized,
Mobility of the inner sleeve relative to the outer sleeve is achieved. The inner sleeve has a flange for attachment to a ship's propeller.

[0003] Between the inner sleeve and the drive shaft there is usually a ring-shaped gap of small thickness.
In particular, during underwater repair operations involving removal of the inner sleeve from the drive shaft and subsequent reassembly, seawater enters the area of the gap between the inner sleeve and the drive shaft, causing corrosion of the gap. . An effective way to avoid such crevice corrosion is
Not known so far. Furthermore, the inner sleeve
Underwater, not fully adjusted to drive shaft.

[0004]

SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to further develop the conventional device as described above,
It is an object to provide a device which achieves a 100% corrosion protection effect and which allows the adjustment of the inner sleeve in water.

[0005]

The object is achieved according to the invention in that the inner sleeve has at least one conduit, which conduit has at least one outlet opening in the region of the inner surface of the inner sleeve. And is made connectable to an oil or lubricating oil supply device.

[0006] With this configuration of the conduit, oil or lubricating oil is supplied to the ring-shaped gap between the drive shaft and the inner sleeve with the aid of an oil or lubricating oil supply device, and the oil or lubricating oil is used as necessary. It is possible to drive out the seawater existing in the gap. Due to the relatively small dimensions of the ring-shaped gap, the penetration of new seawater into the gap by the oil or lubricating oil is prevented for a long time.

The advantage in pushing out the obstructing medium between the inner sleeve and the drive shaft is that the outlet opening of the oil or lubricant supply line is provided in the region of the inner sleeve and faces the propeller of the ship. Can be caused in that

[0008] According to another variant, the outlet opening of the oil or lubricating oil supply line is provided in the region of the inner sleeve and is arranged opposite the propeller of the ship.

By disposing the outlet opening of the oil or lubricating oil supply line at the center of the inner sleeve along the longitudinal axis of the drive shaft, flushing of seawater to both sides is achieved.

The inner sleeve is provided with an inner recess in the region of the inner surface facing the drive shaft and is restricted by the radial projections so that it can more effectively act on the medium to be displaced, , An optimal eviction effect can be achieved.

Since the inner recess has a shape corresponding to the cylinder body, uniform distribution of oil or lubricating oil is possible.

With the at least one ejection element being guided in the region of the inner recess, the ejection action can be further enhanced by means of a scraping action.

[0013] An embodiment with a particularly simple design can be provided by the fact that the displacement element has a ring shape.

Due to the arrangement of the two displacement elements in the region of the inner recess, the inner sleeve is well supported at its ends.

[0015] Good packing action, with at least one displacement element having a tapered portion, the inclination of the tapered portion relative to the axis of the drive shaft corresponding to the inclination of the inclined side surface of the inner recess. In addition, a good adjusting effect on the drive shaft of the sleeve is provided.

By arranging the packing in the area of the at least one radial projection, an uncontrolled ejection of the medium to be expelled from the area between the inner sleeve and the drive shaft can be avoided.

Forming from a packing O-ring can provide a particularly cost-effective embodiment.

By forming the packing as a guide plate, a flat supporting means can be provided.

Due to the fact that the ejection element comprises at least one packing, a very strong ejection action of the disturbing medium is achieved in case of manufacturing tolerances.

A good packing effect is achieved because the displacing element has two packings on each side opposite to each other.

The typical embodiment is provided by the fact that the inner sleeve is fixed to the propeller of the ship.

[0022]

DETAILED DESCRIPTION OF THE INVENTION In the embodiment of FIG. 1, a drive shaft 1 is arranged through a hull structure 2. The drive shaft 1 is guided in the interior space 3 of the hull in a state sealed by a holding sleeve 4. In the region of the outer side 5 of the hull structure 2, an outer sleeve 6 fixed to the hull structure 2 is arranged.

Inside the outer sleeve 6, an inner sleeve 7 is guided and supported. The inner sleeve 7 is fixed to a propeller 8 of the ship. In this case, the inner sleeve 7 extends to the outer part 9 of the drive shaft 1 and projects outside the hull structure 2.

FIG. 2 is an enlarged view of a portion II in FIG. As can be seen from FIG. 2, a number of packing elements 10 are held by the outer sleeve 6 and these packing elements 10 are pressed against the inner sleeve 7. This achieves a strong seal between the inner sleeve 7, which rotates with the drive shaft 1, and the outer sleeve 6, which then moves. Furthermore, as can be seen from FIG. 2, the drive shaft 1 and the inner sleeve 7
Between them, a gap 11 is widened.

In the embodiment of FIG.
Has an inner concave portion 13 in a region of the inner side surface 12 facing the drive shaft 1. This inner recess 13 is limited along the direction of the axis 14 of the drive shaft by an inner radial projection 15 as well as an outer radial projection 16. Between the inner radial projection 15 and the drive shaft 1 there is essentially a ring-shaped gap 11 of dimensions corresponding to the prior art. The distance between the outer radial protrusion 16 and the drive shaft 1 is set to be greater than the distance between the inner radial protrusion 15 and the drive shaft 1.

Through the inner sleeve 7, at least one
An oil or lubricating oil supply line 17 extends, and this line 17 can be connected to an associated oil or lubricating oil supply device through a connecting line (not shown). The oil or lubricating oil supply line 17 has an outlet opening 18 arranged opposite the drive shaft 1. When the oil or lubricating oil supply device is operated, the oil or lubricating oil is supplied to the outlet opening 18 through the oil or lubricating oil supply line 17 to expel seawater existing in the ring-shaped gap 11.

The displacement of seawater from the region of the ring-shaped gap 11 takes place in the region of the inner sleeve 11 along the direction of the axis 14 of the drive shaft.
If 9 is guided movably, it will be stronger and, above all, uniform. This effect is more effective, in particular, if the displacement element 19 has a ring shape and is configured to be adjacent to the drive shaft 1.

FIG. 3 shows the ejection element 19 in a reference position in which the ejection element 19 is arranged at a slight distance from the outlet opening 18. In this embodiment, the oil or lubricating oil supply line 17 is arranged in the region of the mounting flange 20 of the inner sleeve 7 so that the outlet opening 18 is formed on the inner radial projection 1.
5 are located relatively closely and locally. The inner radial projection 15 in this case comprises a single packing 21 extending between the inner radial projection 15 and the drive shaft 1. The displacement element 19 has a packing 22 not only in the region of the outer surface facing the drive shaft 1 but also in the region of the outer surface facing the inner surface 12 of the inner sleeve 7. This packing 22 can be formed, for example, as an O-ring.

In the embodiment shown, in the region of the front end and the rear end of the ejection element along the direction of the axis 14 of the drive shaft, packings 22 are arranged on both sides of the ejection element 19, respectively.
The four packings 22 form substantially rectangular corner points in the sectional view shown.

In addition to the reference position of the flushing element 19 shown in solid lines, FIG. 3 also shows in broken lines the position of the flushing element 19 after the end of the movement process. By being oiled or lubricated, the flushing element 19 is pushed towards the outer radial projection 16 and any seawater which may be present in the area of the ring-shaped gap 11 as well as of the inner recess 13 is reduced to the outer area. Through the gap between the radial projection 16 and the drive shaft 1.

FIG. 4 shows an oil or lubricating oil supply line 17.
Shows another embodiment in which the outlet opening 18 is arranged in the region of the outer radial projection 16. In this embodiment, the distance between the outer radial protrusion 16 and the drive shaft 1 is set to be smaller than the distance between the inner radial protrusion 15 and the drive shaft 1. . In the region of the inner radial projection 15 no packing action takes place, but instead,
One packing 23 is arranged between the outer radial projection 16 and the drive shaft 1. A similar effect is achieved as in the embodiment shown in FIG. 2, whereby a reverse movement of the displacement element 19 is easily achieved.

FIG. 5 shows an oil or lubricating oil supply line 17.
Has its outlet opening 18 in the center of the length of the inner sleeve 7 along the axis 14 of the drive shaft,
1 shows an embodiment arranged therein. Two displacing elements 19 are provided, which are arranged at their initial position at a slight distance from the outlet opening 18 and reduce the pressure of the oil or lubricating oil by the oil or lubricating oil introduced from the rear. When received, they are moved in the direction of the radial projections 15,16. By using two displacement elements 19, the inner sleeve 7 can be supported by the drive shaft 10 in the area of the two radial projections 15, 16 and in the area of the radial projections 15, 16 There is no need to arrange an independent packing.

FIG. 6 is an embodiment similar to the embodiment of FIG. In this embodiment, the flushing element 19
Has a tapered portion in a region at the end opposite to the outlet opening 18, and the tapered portion corresponds to the inclination of the inner side surface 12 in the region of the inner concave portion 13. Due to this wedge shape, the radial projection 1 of the ejection element 19
After the movement in the direction of 5, 16, a pulling action of the inner sleeve, the ejection element 19 and the drive shaft 1 with respect to one another takes place, whereby good adjustment of the sleeve can be achieved. In this embodiment, the packing 22 of the displacement element 19 is the displacement element 1
Nine exit openings 19 are arranged in a half-length area.

FIG. 7 shows a modification of the embodiment of FIG. In the embodiment of FIG.
Are formed to be shorter along the direction of the axis 14 of the drive shaft. The tapered portion 24 of the displacement element 19 and the corresponding sloping side surface 25 of the end region of the inner recess 13 have a greater angle of inclination with respect to the axis 14 of the drive shaft than in the embodiment of FIG. ing. This large angle of inclination makes it possible to remove the packing element 22 in the region of the displacement element 19. This is because the wedges appearing in the region of the tapered portion 24 and the inclined side 25 are
This is because not only an effective packing action but also an adjusting action of the inner sleeve 7 on the drive shaft 1 is provided.
In this case, the eviction element 19 is, for example, PU-
A resilient member formed as a ring, the cam 2 previously provided in the inner recess 13 for adjustment and fixing
6, 27.

[Brief description of the drawings]

FIG. 1 is a principle view of a configuration in which a drive shaft of a marine vessel is arranged to penetrate an outer wall of the marine vessel.

FIG. 2 is an enlarged view of a part II of FIG.

FIG. 3 is a partial longitudinal section of the inner sleeve with the drive shaft when the ejection element is movably guided along the gap between the inner sleeve and the drive shaft.

FIG. 4 is a view similar to FIG. 3, but showing a variant in which the oil or lubricant supply line extends inside the inner sleeve.

FIG. 5 shows another embodiment in which two movable displacement elements are provided.

FIG. 6 shows an embodiment similar to FIG. 5, but in which the ejection element has a ramp for guiding.

FIG. 7 is a view similar to the embodiment shown in FIG. 6, but with a further improved displacement element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive shaft 2 Hull structure 3 Inner space 4 Retaining sleeve 5 Outer hull structure 6 Outer sleeve 7 Inner sleeve 8 Propeller 9 Outer part of drive shaft 10 Packing element 11 Gap 12 Inner side surface 13 Inner recess 14 Drive shaft shafts 15, 16 Projection 17 Oil or lubricating oil supply line 18 Outlet opening 19 Ejection element 20 Mounting flange 21, 22 Packing 24 Tapered portion 25 Slant side surface of end region 26, 27 Cam

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ernst-Peter von Bergen, DE-24811 Aarefeld, Hauptstrasse 12 F-term (reference) 3J033 AA01 BA05 BA12 3J040 AA01 AA13 BA02 HA07

Claims (16)

[Claims] 1. A device for sealing a drive shaft, the device having an inner sleeve for supporting the drive shaft,
The inner sleeve is supported by the outer sleeve and formed to have an inner diameter greater than the outer diameter of the drive shaft;
Is provided with at least one oil or lubricating oil supply line 17.
The oil or lubricant supply line 17 has at least one outlet opening 18 in the region of the inner side 12 of the inner sleeve 7 and can be connected to an oil or lubricant supply. An apparatus characterized in that: 2. The oil or lubricating oil supply line 17 has an outlet opening 18 provided in the region of the inner sleeve 7 and arranged opposite a propeller 8 of a ship. An apparatus according to claim 1. 3. An oil or lubricating oil supply line (17) having an outlet opening (18) in the area of the inner sleeve (7) and arranged on the opposite side of the ship's propeller (8). An apparatus according to claim 1. 4. An oil or lubricating oil supply line according to claim 1, wherein an outlet opening of said oil supply line is arranged at a central portion of said inner sleeve along a direction of a shaft of a drive shaft. An apparatus according to claim 1. 5. The inner sleeve (7) has an inner recess (13) in the area of the inner surface (12) facing the drive shaft (1), wherein the inner recess (13) has radial projections (15, 16).
Apparatus according to any of the preceding claims, wherein the apparatus is limited by: 6. The apparatus according to claim 1, wherein the inner concave portion has a shape corresponding to a cylinder body. 7. The device according to claim 1, wherein at least one displacement element is guided in the region of the inner recess. 8. The device according to claim 7, wherein the displacement element has a ring shape. 9. The device according to claim 1, wherein two displacement elements are arranged in the region of the inner recess. 10. The at least one displacement element 19 has a tapered portion 24, the inclination of which of the tapered portion 24 with respect to the axis 14 of the drive shaft corresponds to the inclination of the inclined side surface of the inner recess 13. Apparatus according to any of the preceding claims, characterized in that: 11. At least one radial projection 1
11. The device according to claim 1, wherein packings (21, 23) are arranged in regions (5, 16). 12. Device according to claim 11, wherein the packings (21, 23) are formed as O-rings. 13. The device according to claim 11, wherein the packings are formed as guide plates. 14. The device according to claim 1, wherein the displacing element comprises at least one packing. 15. The device according to claim 1, wherein the displacement elements have two packings on opposite sides. 16. The ship according to claim 1, wherein the inner sleeve is fixed to a propeller of the marine vessel.
An apparatus according to any of claims 15 to 15.