JPS59190091A - Vibration-proof supporter for small vessel main engine - Google Patents

Abstract

PURPOSE:To reduce the amplitude of main engine by receiving thrust through vibration absorbing rubber while suppressing resonance through vibration absorbing rubber encapsulated with liquid. CONSTITUTION:Main engine 1 is supported through vibration-proof supporters 5A and 5B between fixing feet 2A, 2B planted at the front and rear and the floor 4 of vessel 3. In order to reduce the amplitude, a rear side vibration absorbing supporter 5B made of vibration absorbing rubber encapsulated with liquid is provided in main engine 1. But since thrust is applied onto the rubber body 23 to deform considerably, total rubber body is employed for the front side supporter 5A to bear the thrust force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration isolation support device for a small marine main engine that can suppress resonance phenomena and can also receive thrust force.

When installing the main engine of a small ship, when supporting the legs against the ship's platform for anti-vibration purposes, use all-rubber anti-vibration rubber that has an anti-vibration effect over the entire operating rotation range of the main engine. The engine was supported in a vibration-proof manner on a ship's support stand, and its vibration-proof rubber had rigidity that could withstand thrust.
1054], but in this case, there is often a resonance point in the operating range, and the engine amplitude is large even outside the resonance point, which poses a problem.

Therefore, in order to reduce the amplitude,
Liquid-filled anti-vibration rubber has been used in recent years, as exemplified by the invention of No. 430.

However, in this case as well, there is a problem in that thrust force is applied to the rubber portion of the main marine engine, resulting in large deformation of the rubber.

The present invention has been made to solve the above-mentioned problems.In a vibration isolating support device for a small marine main engine, the thrust force is received by a vibration isolating rubber, and a liquid-filled vibration isolator is used. The purpose is to create an ideal vibration-proof installation that uses rubber to suppress resonance phenomena.

That is, the anti-vibration support device of the present invention is a small marine main engine whose front and rear sides are anti-vibration supported, and where either the front side or the rear side is anti-vibration supported with liquid-filled anti-vibration rubber, and The other side is anti-vibration supported with anti-vibration rubber made entirely of rubber.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a vibration isolation support device for a main engine for a small marine vessel in an embodiment of the present invention.

In short, this main engine 1 has legs 2A and 2B protruding from its front side F and rear side R, respectively, which are connected between the legs 2A and 2B and the platform 4 of the ship 6 via vibration isolating support devices 5A and 5B. , platform 4
It is supported in an anti-vibration manner on top.

8 is the output shaft of the main engine 1, and this output shaft 8 and propeller shaft 9
The propeller 7 is connected to the propeller shaft 9 via a universal joint 10, and the propeller 7 is attached to the end of the propeller shaft 9.

Next, as shown in FIG. 2, the vibration isolation support device 5A on the front side F has a frame 16 consisting of sloped surfaces 11.11 on both sides and a bottom plate 12 connecting these, and the sloped surfaces 11.11. The outer end is glued to the both inclined surfaces 1 of the hollow triangular prism 14.
5.15 and a rubber body 16.15, on the top surface of the triangular prism body 14 there is a bolt 17 that engages the leg 2A for installing the engine, and on the bottom surface of the bottom plate 12 of the frame body 16 there is a bolt 17 that engages the leg 2A. A bolt 18 is provided protrudingly to engage with the platform 4 of.

Then, the axis line A-A of each rubber body 16 is carved on the bottom plate 12, and the inclined surfaces 11, 11°15.1 are tilted at an angle θ0.
Reference numerals 3° 19 for selecting the tilting angle of 5 are a plurality of inner plates inserted in the middle of the rubber body 16 to increase the rigidity of the comb body 16.

When the vibration isolating support device 5A having such a structure is arranged so that the axial direction of the rubber body 16 coincides with the thrust direction of the main engine 1, the rubber body 16 has an axial direction with respect to the thrust direction XX. Since only force in the compression or extension direction acts on the rubber body 16, the rigidity of the rubber body 16 is high.

On the other hand, since only a shearing force acts on the rubber body 16 in the vertical direction Z-Z, the rubber body 16 does not exhibit any bending rigidity. Since it is constructed from a material with the above-mentioned vibration transmissibility, it exhibits a vibration-proofing effect over the entire rotation range of the main engine 1 with respect to horizontal vibrations. It has enough rigidity to withstand thrust, and this anti-vibration support device 5A can provide anti-vibration support for the main engine 1.

Next, as shown in FIG. 3, the vibration isolating support device 5B on the rear side R of the main engine 1 is installed on the upper plate 22 attached to the leg 2 side and the 9th plate mounted on the platform 4 side. A rubber body 23 is interposed between the lower plate member 21 to be covered, and a liquid 25 such as water is sealed inside the rubber body 23, and an upper chamber U in which the liquid 25 is sealed;
An orifice 24 is provided between the lower chamber and the lower chamber.

By using the anti-vibration support device 5B made of the rubber body 23 filled with the liquid 25, the response amplitude that always exists when the main engine 1 is anti-vibration supported on the platform 4 can be reduced. be able to,.

Therefore, in the main engine 1 for small ships having the above-mentioned configuration, in order to reduce the amplitude, a vibration isolating support device 5B on the rear side R made of liquid-filled vibration isolating rubber as shown in FIG. 3 is provided. However, since the main engine 1 is for a ship, thrust is applied to the rubber body 26, and the deformation of the rubber body 26 becomes large. The thrust force is received by using a rubber body 16 made entirely of rubber as shown in FIG. .

Therefore, in Fig. 4, the vertical displacement (P-Pmm) of the engine mounting foot with respect to the engine rotation speed (rpm) of a conventional small marine main engine supported by anti-vibration rubber is shown in line A. Test results have confirmed that the main engine 1 employing the anti-vibration support device of the present invention provides ideal anti-vibration support as shown in diagram B.

Note that, contrary to the above embodiment, a third
It is also effective to use a vibration isolating support device 5B as shown in the figure and a vibration isolating support device 5B as shown in FIG. 2 on the rear side.

Therefore, if the vibration isolating support device of the present invention is adopted, the vibration isolating rubber made entirely of rubber can receive the thrust, and the vibration isolating rubber filled with liquid can suppress the resonance phenomenon to reduce the amplitude of the main engine, which is ideal. This has the effect of making vibration-proof installation possible.

[Brief explanation of drawings]

FIG. 1 is a side view of a vibration isolating support device for a small marine main engine according to an embodiment of the present invention, FIG. 2 is a side view of a vibration isolating support device on the front side of the main engine of FIG. 1, and FIG. FIG. 4 is a vertical cross-sectional view of the vibration isolating support device on the rear side of the main engine, and FIG. , 1... Main engine, 2 people, 2B... Installation by feet, 3...
Ship, 4... Platform, 5A, 5B... Anti-vibration support device,
16...Rubber body, 26...Rubber body, 25...Liquid, F...Front side, R...Rear side. Agent: Patent Attorney Makoto Ogawa − Patent Attorney: Ken Noguchi Patent Attorney: Kazuhiko Saishita (7)

Claims (1)

[Claims] In a small marine main engine that is supported with anti-vibration support on its front and rear sides, one of the rear sides is anti-vibration supported with liquid-filled anti-vibration rubber, and the other side is supported with anti-vibration rubber made entirely of rubber. A vibration-isolating support device for a small marine main engine characterized by vibration-isolating support using vibrating rubber.