JPH01136890A - Ship with buffering supporting mechanism for living space structure - Google Patents

Abstract

PURPOSE:To reduce the shaking of a living space structure in the captioned ship in which the living space structure is supported on a hull via a buffering mechanism such as an air cylinder, etc., by controlling the spring constant of an air spring and the damping coefficient of a shock absorber in accordance with maritime phenomena. CONSTITUTION:A ship with a buffering supporting mechanism for a living space structure has a main hull 1 and a living space structure 2 which is supported on the hull via buffering supporting mechanisms 3, 4. An air spring 3 consists of a main air chamber 9a and a capacity variable sub-air chamber 5a which is connected to the main air chamber. A shock absorber 4 has a variable orifice 10 on a fluid moving course 4a and, by adjusting the throttle of the variable orifice 10, the moving resistance of a fluid flowing in upper and lower spaces can be varied. The air spring 3 and the shock absorber 4 are controlled by the operation of a feeding/discharging air selector valve 7, the variable orifice 10, and a pressure oil selector valve 8 by means of an arithmetic and control device 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ship with a shock absorbing support mechanism that reduces the propagation of vibrations to accommodation structures of the ship, and in particular,
This invention relates to a ship equipped with a shock absorbing support mechanism whose static characteristics can be controlled.

[Conventional technology]

In conventional ships, especially high-speed boats, the frequency of encounter with waves is high, and the vertical acceleration induced by the hull motion has a high frequency, so in addition to the hull vibration caused by the engine vibration force, this high-frequency motion propagates into the cabin. This results in a decrease in ride comfort.

For this reason, attempts have been made to separate the main hull and the living quarters structure to reduce noise and vibrations propagating from the main hull to the living quarters structure. In such a ship, a structure is adopted in which the living quarters structure is supported on the main hull via a buffer type support mechanism consisting of a spring and a shock absorber arranged in parallel with each other.

Recently, attempts have also been made to directly control the movement of living quarters structures relative to the movements of the main hull. It is designed to move against the

[Problem that the invention seeks to solve]

However, the conventional shock-absorbing support mechanism described above is not necessarily optimal for the response of the accommodation structure depending on the state of the sea conditions and ship movement, and in particular, it is difficult to synchronize the ship movement and sea conditions. In some respects, depending on the choice of the static properties of the shock absorbing system, it is even possible to make the movements of the accommodation structure greater than those of the main hull.

Furthermore, in systems in which living quarter structures are directly controlled with respect to the motion of the ship, the responsiveness to high-frequency motion is not necessarily good, and there is a problem that a sufficient effect of suppressing high-frequency motion cannot be obtained.

The present invention aims to solve these problems, and aims to improve the stability of accommodation structures by making it possible to control the static characteristics of air springs and shock absorbers as shock absorbing support mechanisms in accordance with the movement of the main hull. It is an object of the present invention to provide a ship with a buffer support mechanism for living quarters structures that effectively reduces vibrations.

[Means for solving problems]

In order to achieve the above-mentioned object, a ship with a buffer support mechanism for living quarters structures of the present invention includes a main hull and a living quarters structure supported on the main hull via a shock absorbing support mechanism,
The support mechanism is equipped with an air spring and a fluid-moving shock absorber that are arranged in parallel with each other, and the air spring has a main air chamber and a variable capacity sub-air chamber that communicates with the main air chamber. and a first detection system for detecting the movement of the main hull, and a second detection system for detecting the movement of the living quarters structure. detection system,
A control system is provided which can receive each detection signal from the first and second detection systems and maintain the capacity of the auxiliary air chamber in the air spring and the opening degree of the variable orifice in the shock absorber at respective optimum values. It is characterized by the fact that

[For production]

In the above-mentioned ship with a buffer support mechanism for accommodation structures according to the present invention, the main air chamber constituting the air spring and the variable capacity sub-air chamber communicating with the main air chamber are used as the main air chamber for detecting the movement of the main hull. The control system operates in response to detection signals from the first detection system and the second detection system that detects the movement of living quarters structures, thereby maintaining the capacity of the sub-air chamber at an optimal value and also preventing shock. The variable orifice in the fluid movement path of the absorber acts to maintain the opening degree of the variable orifice at an optimal value by the operation of the control system based on the above-mentioned detection signal, and the air spring and shock absorber arranged in parallel Control is carried out to optimize the static characteristics of the main hull and the living quarters structure.

〔Example〕

Next, to explain an embodiment of the present invention, Figs. 1 to 4 show a ship equipped with a buffer support mechanism for accommodation structures as an embodiment of the present invention, and Fig. 1 shows the buffer support mechanism. Figure 2 is a side view of a ship with a buffer support mechanism for accommodation structures, Figure 3 (A) is a characteristic diagram showing the static characteristics of its air spring, and Figure 3 (b) is its shock. Figure 3 (C) is a characteristic diagram showing the static characteristics of the absorber, Figure 3 (C) is a characteristic diagram showing the relationship between the height and vibration of the living area structure, and Figure 4 is a flow chart of signals in the detection system and control system. be.

As shown in FIG. 2, a ship equipped with a buffer support mechanism for living quarter structures includes a main hull 1 and a buffer type support mechanism 3 on the main hull 1.
．． The living quarters structure 2 is supported through 4. The buffer type support mechanisms 3 and 4 include an air spring 3 and a fluid displacement shock absorber 4 arranged in parallel with each other.
It is equipped with.

As shown in FIG. 1, the air spring 3 has a main air chamber 9! And main air chamber 9! Variable capacity auxiliary air chamber 5 that communicates with! It is made up of. The air spring 3 is composed of a bellows 9 and a piston cylinder mechanism 5, the inside of the bellows 9 constitutes a main air chamber 9, and the inside of one cylinder separated by the piston 5c of the piston cylinder mechanism 5 constitutes a sub air chamber 5a. do. A piston 5c of the piston-cylinder mechanism 5 is operated by an actuator 6 using a similar piston-cylinder mechanism, and the capacity of the auxiliary air chamber 5a is changed by the movement of the piston 5c. The actuator 6 is operated by pressure oil supplied and discharged from a hydraulic pump 11 via a hydraulic switching valve 8.

The main air chamber 9a of the bellows 9 is connected to the air compressor via the supply/exhaust switching valve 7 and the air reservoir 13.
An operation of feeding air from the air compressor into the main air chamber 9a by switching the supply/exhaust switching valve 7, and
An operation is performed in which the air inside is discharged to the atmosphere through the supply/exhaust switching valve 7.

This operation is performed in order to keep the average height of the living quarters structure 2 constant when the volume of the sub-air chamber 5a is changed to change the spring constant.

On the other hand, the shock absorber 4 has its fluid movement path 4a
is equipped with a variable orifice 10, and by adjusting the throttle of this variable orifice 10, the movement resistance of the fluid when it flows between the upper and lower chambers partitioned by the piston of the cylinder of the shock absorber 4 is changed.

The air spring 3 and the shock absorber 4 are controlled by an air supply/exhaust switching valve 7. controlled by a control calculation device 12. It is controlled by operating the variable orifice 10 and the pressure oil switching valve 8.

FIG. 3 (,) shows the change in the spring constant when the volume of the sub-air chamber 5M of the air spring 3 is changed. When the volume of the sub-air chamber 5a is increased, the spring constant becomes smaller and the spring becomes weaker. It can be seen that

FIG. 3(b) shows the change in the damping coefficient when the orifice of the variable orifice 10 of the shock absorber 4 is changed, and the damping coefficient can be reduced by opening the orifice and reducing the amount of bypass oil. Recognize.

FIG. 3(c) shows the necessity of keeping the average height of the living area structure 2 constant when changing the spring constant by changing the volume of the sub-air chamber 5a. At the intermediate (average height) position, it is shaken in the vertical direction, at its lowest position, it is shaken only in one direction, and at its highest position, it is not shaken in either direction. Therefore, by placing the air spring 3 at an intermediate position where it is subject to vibrations in both the up and down directions, it acts to buffer vibrations in both directions.

Figure 4 shows the signals 70- in the detection system and control system of the buffer support mechanism.
The movement (up and down, pitching and rolling) of the living area structure 2 is controlled by the air spring 3 and the shock absorber 4.
(up and down, pitching, and rolling), but at that time, the main hull
The movement of the residential structure 2 is sent to the CPU via the first detection system, and the movement of the living area structure 2 is sent to the CPU via the second detection system. Then, by adding the weight value of the living area structure 2 to these signals, the optimum value is calculated in the CPU, and the resulting signal is used to control the spring constant of the air spring and the shock absorber via the control system. Control of the damping coefficient is performed.

(Effects of the Invention) As described in detail above, according to the ship with a buffer support mechanism for accommodation structures of the present invention, the spring constant of the air spring and the damping coefficient of the yoke absorber change depending on the sea conditions and the movement of the ship. Since it is constantly adaptively controlled to the optimal value, the hull motion transmitted to the accommodation structure due to changes in sea conditions and hull motion is minimized, and the ride comfort of the ship is significantly improved, especially at high speeds. Benefits that can be obtained.

[Brief explanation of the drawing]

Figures 1 to 4 show a ship with a buffer support mechanism for a living quarters structure as an embodiment of the present invention. Figure 3 (&) is a characteristic diagram showing the static characteristics of its air spring; Figure 3 (b) is a characteristic diagram showing the static characteristics of its shock absorber; Figure (c) is a characteristic diagram showing the relationship between the height and vibration of the residential structure, and Figure 4 is a flowchart of signals in the detection system and control system. 1. Main hull, 2. Accommodation structure, 3. Air bomb,
4... Shock absorber, 4! ...Fluid movement path, 5
・・Piston cylinder mechanism, 5a・・Sub-air chamber, 5c・
・Piston, 6. Actuator, 7. Supply/exhaust switching valve, 8. Pressure oil switching valve, 9. Bellows, 9a. Main air chamber, IO.. Variable orifice, 11. Hydraulic pump.
12...Control calculation device, 13...Air reservoir. Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2 Static characteristics of stroke air spring (b) Static characteristics of stroke speed shock absorber (C)

Claims (1)

[Claims] It has a main hull and a living quarters structure supported on the main hull via a shock-absorbing support mechanism, and is equipped with an air spring and a fluid displacement shock absorber arranged in parallel with each other as the support mechanism. and the air spring is connected to the main air chamber,
A first detection system configured to include a variable capacity sub-air chamber communicating with the main air chamber, the shock absorber having a variable orifice in its fluid movement path, and detecting the movement of the main hull. and a second detection system that detects the movement of the residential structure, and receives each detection signal from the first and second detection systems to determine the capacity of the auxiliary air chamber in the air spring and the capacity of the shock absorber. A ship equipped with a buffer support mechanism for living quarter structures, characterized in that a control system is provided that can maintain the opening degree of each variable orifice at an optimum value.