JPS608340Y2 - vibration damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration damper for reducing towing noise of an underwater towed object.

Figure 1 is a partial cross-sectional view showing the structure of a conventional vibration damper used in underwater towed objects such as underwater receivers towed by ships, and Figure 2 is a cross-sectional view taken along line A-A in Figure 1. In the figure, 1 is a cylindrical housing with elasticity, 2 is a rope-like tension member provided inside the housing 1, 3 is a signal line introduced into the housing 1, and 4 is a line inside the housing 1. When tension is applied to the casing 1, the elasticity of the casing 1 damps vibrations generated during towing and reduces towing noise.

In this type of vibration damper, when a tension exceeding a specified value is applied to the casing 1, the casing 1. Since there is a risk that the housing 1 may break, tension is transmitted to the tension member 2 when the housing 1 stretches to a certain extent.

However, if there is no extra length in the tension member 2, the tension is immediately transmitted to the tension member 2 and the original damping characteristics cannot be obtained. When the body 1 is less than the required elongation, it is necessary to prevent tension from being transmitted to the tension member 2.

Therefore, conventionally, in order to have sufficient extra length for the tension member 2, the tension member 2 was stored in the housing 1 by meandering or bending.
Since the tension member 2 is rope-like, workability is poor, and the tension member 2 suffers from deformation called kinks or kinks, which promotes fatigue.

In addition, underwater towing bodies including vibration dampers are operated by winches and other hoisting machines during suspension, lifting, and storage.
In such a case, in the conventional structure described above, the rope-shaped tension member 2 is pressed against the drum side and the signal line 3
There were drawbacks such as damage to the

Furthermore, if a wire rope were used as the tension member 2, the weight would increase with high-speed towing, so there was a drawback that weight reduction could not be expected.

The present invention is aimed at solving these drawbacks, and is characterized by the use of a cylindrical tension member made of flexible woven fabric.

One embodiment of the present invention will be explained below with reference to the drawings. Fig. 3 is a partial sectional view showing the structure of the vibration damper according to the invention, Fig. 4 is a sectional view taken along the line A-A in Fig. 3, and 1 is The housing, 3 is a signal line, and 4 is a filling oil, which are the same as those in FIGS. 1 and 2.

Reference numeral 5 denotes a cylindrical tension member, which is made of a woven fabric having the necessary strength, such as a Kevlar fiber woven fabric, into a cylindrical shape, and the present invention provides the signal line 3 and the like inside this cylindrical tension member 5. In addition to arranging the internal components of
The tension member 5 is bent into a bellows shape and housed in the casing 1 with sufficient extra length so that the tension member 5 acts when the casing 1 is stretched beyond a specified limit due to tension. be.

According to the vibration damper of the present invention constructed in this way, the tension member 5 formed into a cylindrical shape from a flexible woven fabric is used, and the tension member 5 is bent into a bellows shape to give a length of thread to form a housing. 1, it can be easily stored without strain, and has the advantage that workability is improved and phenomena such as kinks due to bending do not occur.

In addition, since the signal line 3 is wrapped and stored in a cylindrical tension member 5 made of woven fabric, the signal line 3 can be pressed against the drum side during hanging, lifting, and storage, unlike the conventional structure. It won't cause any damage.

Furthermore, since the tension member 5 is made of a cylindrical woven fabric, there is an advantage that the space factor for the required strength is effective and the weight of the vibration damper can be reduced.

As explained above, since the present invention uses a cylindrical tension member made of flexible woven fabric, assembly work is easy, signal lines etc. are not damaged, and the space factor for strength is reduced. Since it is effective and has the effect of reducing weight, it is highly useful as a vibration damper for underwater towed objects such as long underwater wave receivers.

[Brief explanation of drawings]

Figure 1 is a sectional view showing the conventional example, and Figure 2 is A-A in Figure 1.
3 is a sectional view showing an embodiment of the present invention, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 1... Housing, 3... Signal line, 4... Curved oil, 5... Tension member.

Claims (1)

[Scope of utility model registration request] In a vibration damper that houses a signal line and filling oil in an elastic housing and is provided with a tension member to prevent breakage due to stretching under tension, A vibration attenuator characterized in that the signal line is housed so as to be wrapped therein, and the tension member is bent into a bellows shape with an extra length so as to act upon the prescribed elongation of the housing, and is housed in the housing.