JPH02270698A - Counter rotating propeller shaft system sealing lubricating device for vessel - Google Patents

Abstract

PURPOSE:To obtain a sealing device which possesses high reliability and can be easily manufactured, by allowing the part between the bow side sealing rings for the inner and outer shafts through an oil communication hole, in a driving system device for a counter rotating propeller driven by an inner shaft and a hollow outer shaft. CONSTITUTION:A driving system device for a counter rotating propeller which is driven by an inner shaft 1 and a hollow outer shaft 2 which is fitted coaxially with the inner shaft 1 is equipped with an outer shaft bow side sealing device 8 consisting of a casing 8-1, seal ring 8-2, seal liner 8-3, and a clamp ring 8-4. Further, an inner shaft bow side sealing device 9 consisting of a casing 9-1, seal ring 9-2, seal liner 9-3, and a clamp ring 9-4 is provided. In this case, communication holes 8-5, 6-1, and 9-5 are formed on the seal liner 8-3, clamp ring 8-4, outer shaft assembly flange 6, and the casing 9-1, and the part between the seal ring 8-2 and the seal ring 9-2 is allowed to communicate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lubricating device for an inner sleeve bow side seal installed in a marine counter-rotating propeller shaft system.

[Conventional technology]

The conventional marine counter-rotating propeller shaft system seal lubrication system is
For example, as shown in Japanese Utility Model Application No. 60-18900,
1' is an inner sleeve that transmits the power of the main engine (not shown) to the rear propeller, 2' is a reversing gear (not shown), and intermediate outer shaft 3'1
The outer shaft, 5', which transmits power to the forward propeller through the assembled flaret, 4', is a fixed bushing fitted to the inner surface of the outer shaft, and the floating bushing 6' and the inner shaft on the bow side are connected to each other. Configure the reception.

7' is the inner sleeve bow side seal device, 8' is the inner shaft oil passage hole, and 9' is the inner sleeve bow side sealing device.
, 10' are outer shaft wandering oil holes, which are connected to an outer shaft bow side sealing device (not shown).

In such a structure, lubricating oil a' supplied by an oil pump (not shown) lubricates the bearing and sealing device in the stern portion through the following route.

That is, the lubricating oil a' flows to the bow side outer shaft bearing (not shown), the stern side outer shaft bearing, the stern side inner shaft bearing, and the bow side inner shaft bearings 5' and 6'. The lubricating oil is divided into two directions, one flowing out through the outer ring oil passage hole a' to an oil drain port (not shown), and the other flowing through the inner shaft oil passage hole 8' to the inner sleeve bow side sole fitting 7. ``Outer shaft oil passage hole 10' - The oil also flows out to the oil drain port through the outer ring bow side sealing device (not shown).

[Problem to be solved by the invention]

However, in such a structure, there are problems as described below.

(1) There is an inner shaft bow side seal 7' at the end of the lubrication path,
This lubricating oil is hot and dirty and is not suitable for lubricating the seal.

(2) A communication hole (8)' on the inner shaft (1)' and outer shaft (2)'
, (9)'.

(10)' is provided, but it reduces the strength of the shaft, it is difficult to machine the oil passage hole, and the hole allows dirt to get in! , ' is not practical due to the risk of blockage.

(3) The differential pressure of the #5 seal ring, that is, the difference between the drain oil pressure of the inner shaft bearings and the atmospheric pressure, increases, increasing the possibility of damage, and the #4 seal ring is not functioning because there is no differential pressure. do not have. The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a counter-rotating marine propeller-shaft system seal lubrication device that is easy to manufacture and highly reliable.

[Means to solve the problem]

To this end, the present invention provides a shaft system device for a marine counter-rotating propeller driven by an inner shaft and a hollow outer shaft coaxially inserted therein, between the bow side seal ring of the inner shaft and the outer shaft. It is characterized by communicating with the seal rings on the bow side of the shaft through an oil communication hole.

[Effect]

With this configuration, #55 of the inner shaft bow side seal device
The differential pressure after the seal ring is the specified value (02~0.3 kg/
14 cm2) of the inner ring bow side sealing device. #
The space between the seal rings 5 is always filled with lubricating oil and slides under constant pressure, so damage to the seal rings is avoided.
If it is easy to manufacture, a highly reliable marine contra-rotating propeller shaft system seal lubrication device can be obtained.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partial vertical sectional view thereof.

In the above figure, 1 is an inner shaft, 2 is an outer shaft, 3 is a stern frame, 4 is a rear bulkhead of the engine room, 5 is an inner shaft bearing, 6 is an assembly flange, which has a communication hole 6-1, It is connected to the outer input shaft 7.

8 is a paddle bow side sole device, and a casing 8-1.
Seal ring 8-2. Seal liner 8-3. It is composed of a crumbling ring 8-4 and has a communication hole 8-5.

9 is the inner sleeve bow side seal fitting, and the casing 9-1.
Seal ring 9-2. It is composed of a seal liner 9-3 and has a communication hole 9-5.

Reference numeral 9-4 is a circulator, and if this is equipped and two communicating holes are provided, the circulation of lubricating oil between the seal rings 9-2 will be promoted.

In such a structure, the sole liner 8-3 and the crumbling ring 8-4 of the outer shaft bow side seal fitting 8-8. By providing a communication hole in the outer shaft assembly flange 6 and the casing 9-1 of the inner sleeve bow seal device 9, both seal fittings 8
．． The lubricating oil between the #9 seal rings 8-2 and 9-2 is filled and the pressures are also the same, and as a result, the differential pressure of the #5 seal ring falls within the specified value.

〔Effect of the invention〕

According to such a structure, the following effects can be achieved.

(1) Due to the communication hole, the pressure inside the seal ring cabinet of the inner shaft and outer shaft bow seal devices becomes constant, and as a result, the differential pressure after the #55 seal ring of the inner sleeve bow seal device becomes the specified value. This improves the reliability of the sealing device.

(2) Since no communication hole is provided in the outer shaft body, problems such as a decrease in the strength of the outer shaft and ease of manufacture are eliminated, resulting in a simple, realistic, and practical shaft system.

(3) By making it a communicating hole, it becomes possible to monitor abnormalities such as leakage of the inner sleeve bow side seal device or indirectly by checking the oil level of the oil tank for the outer shaft bow side seal device.

In short, according to the present invention, a marine vessel is driven by an inner shaft and a hollow outer shaft coaxially inserted therein.

In the shaft system of a counter-rotating propeller, the seal rings on the bow side of the upper xe inner shaft and the seal rings on the bow side of the outer shaft are communicated through an oil communication hole, making it easy to manufacture. The present invention is extremely useful industrially because it provides a highly reliable marine contra-rotating propeller-shaft seal lubrication system.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a partial vertical cross-sectional view showing the vicinity of an inner shaft bow side sealing device of a known marine counter-rotating propeller shaft system. DESCRIPTION OF SYMBOLS 1...Inner shaft, 2...Outer shaft, 3...Stern frame, 11...Engine room rear bulkhead, 5...Inner shaft bearing, 6...
・Assembly flange, 6-1...Communication hole, 7...Outer shaft input shaft, 8...Outer shaft bow side seal device, 8-1...Casing, 8-2...Seal ring, 8 -3...Seal liner, 8-4...Crumble ring, 9...Inner shaft bow side seal device, 9-1...Casing, 9-2
・Sole ring, 9-3... Seal liner, 9-4
...Circulator-19-5...Communication hole, agent
Patent Attorney Masafumi Tsukamoto

Claims (1)

[Claims] In a shaft system device for a marine counter-rotating propeller driven by an inner shaft and a hollow outer shaft coaxially inserted therein, between the bow side seal ring of the inner shaft and the bow side seal ring of the outer shaft. A marine counter-rotating propeller shaft seal lubrication device, characterized in that the two are communicated with each other through an oil communication hole.