KR20090116010A - Hydraulic top bracing - Google Patents

Abstract

PURPOSE: A hydraulic top bracing apparatus is provided to reduce the deformation of or the damage to a hull by buffing vibration and impact of an engine when a ship shakes. CONSTITUTION: A hydraulic top bracing apparatus comprises a cylinder(2), a manifold block(3), a piston(4), a piston rod(5), a flange(6) and an accumulator(13). First, second and third flow paths are formed inside the manifold block. A non-return valve(7) is formed in the first flow path. The non-return valve prevents the oil leakage from an oil room(1). A relief valve(9) is installed in the second flow path. The relief valve drains the oil of the oil room to the first flow path, if the internal pressure of the oil room is over a preset value. A solenoid valve is installed in the third flow path and discharges the oil from the oil room to the first flow path, if the rotation number of the engine is over the preset value. The accumulator collects the oil from the oil room or supplies the oil to the oil room.

Description

Hydraulic top bracing device {Hydraulic top bracing}

The present invention relates to a hydraulic top bracing device installed between an engine and a ship's hull to reduce vibration generated during normal engine operation. More particularly, the present invention relates to an accumulator connected to a cylinder and a cylinder by sensing an engine rotation speed. Through the solenoid valve which regulates the flow of fluid between the accumulator and the accumulator, the cylinder fluid flows freely to the accumulator to hold the engine loosely after the engine is rotated due to high rotational speed of the engine or during acceleration. At low speed or constant velocity, where the number of revolutions is low and the vibration is low, the cylinder fluid does not flow to the accumulator to firmly hold the engine. Effect of deformation and cracks The present invention relates to a hydraulic tower bracing device which can further improve the service life of the ship prevented.

[Document 1] Republic of Korea Patent No. 10-0250789, 2000.01.07.

[Document 2] Korean Utility Model Registration No. 20-0236126, June 16, 2001.

In general, a large vessel has a top bracing function that supports the engine and absorbs the vibration at the same time to prevent the vibration generated from the engine as it is transmitted to the hull to prevent the deformation and breakage of the hull, thereby improving the feeling of boarding. The device is installed.

The top bracing device has a flange installed on a piston inserted into the cylinder, and an auxiliary piston is installed between the cover of the cylinder so that the main chamber, the auxiliary chamber, and the air chamber are partitioned. A check valve is provided to disperse the cylinder, and an extension bar installed in the joint groove of the piston and the bracket, and a semi-circular and semi-spherical male bushing are installed in the joint groove at both ends of the dis- tance bolt. It was able to buffer while moving.

However, the top bracing device is provided with a separate flange, an auxiliary piston, and a cylinder cover in a piston inserted into a cylinder having a diameter smaller than that of the cylinder. It did not absorb quickly. In addition, since the volume of the air chamber is very small and a large amount of high pressure air must be injected, the existing equipment cannot supply the necessary air, so a separate high pressure compressor has to be installed.

In addition, because the male and female bushings installed in the joint grooves of the piston and the bracket are inserted into the grooves, they are not sealed to the outside. Therefore, dust or foreign matter easily penetrates and interferes with the smooth operation of the male bushings. It did not move freely. And since the one-way check valve for returning the oil moved from the main chamber to the auxiliary chamber back to the main chamber is installed and operated with the relief valve on the outer surface of the cylinder, in the process of generating and reducing the vibration of the engine irregularly and continuously Rapid oil flow did not result in accurate operation.

In order to solve this problem, a gasket is installed outside the bearing and the bushings provided at both ends of the piston rod, and the auxiliary piston is inserted into the piston so as to be movable so that the second oil communicates with the first oil chamber of the cylinder. The top bracing device for ship engine vibration attenuation, which has an oil chamber and an air chamber, and has a check valve for moving oil from the second oil chamber to the first oil chamber in the piston base plate, has been devised.

Accordingly, when the vibration and shock of the engine is transmitted through the flange, the piston rod, which is installed as a bearing and a bushing, moves freely in all directions and is transmitted to the piston. At this time, the end of the piston rod is transferred to the piston while moving freely, and oil and The reaction of air absorbs shock and vibration.

However, the conventional vibration damping top-brasing device only works when the vibration and impact of the engine are very large, such as when the ship vibrates three-dimensionally in high waves or when the ship moves by rotating in a port or starboard. When vibration and shock of an engine having a short frequency occurring immediately after the start of the engine or when the engine is accelerated are generated, the piston rod is kept in a state where the piston rod is not operated.

Therefore, if vibration and shock of an engine having a short frequency, such as immediately after starting the engine or when acceleration occurs, the vibration and shock cannot be absorbed and buffered properly, which may cause deformation or breakage of the hull and a feeling of boarding of the ship. There is a problem of deterioration.

The present invention has been invented to solve the above problems, while absorbing and buffering the vibration and shock of the engine having a very large amplitude generated when the ship fluctuates greatly, the frequency is short and continuous when the engine is started or accelerated. A cylinder fixed to the hull and having an oil chamber therein to cushion the vibration and shock of the engine so as to effectively prevent deformation or damage of the hull and to improve the boarding feeling of the ship; A manifold block disposed outside the cylinder to control a flow of oil injected into the oil chamber; A piston installed inside the cylinder and linearly reciprocating according to the pressure of the oil injected into the oil chamber; A piston rod fixed to the other end of the piston; One end is fixed to the piston rod and the other end is a flange fixed to the engine; A conventional top bracing device comprising: a first flow passage provided with a non-return valve connected to an oil chamber and preventing oil from flowing out of the oil chamber inside the manifold block, between the front end and the rear end of the first flow path; When the oil pressure of the oil chamber is higher than the set value and the oil pressure of the oil chamber is connected to the second flow path provided with a relief valve which flows out into the first flow path, and between the front and rear ends of the first flow path and the engine speed is higher than the set value. Third passages each provided with a solenoid valve for distilling oil from the oil chamber into the first passage; It is an object of the present invention to provide a hydraulic top bracing device having an accumulator connected to a first flow passage outside the manifold block to supply or recover oil from an oil chamber.

The hydraulic top braking device of the present invention absorbs and cushions the vibration and shock of an engine having a very large amplitude generated when the ship fluctuates greatly, and at the same time, it absorbs the vibration and shock of a short and continuous engine when the engine is started or accelerated. This effectively prevents the deformation and breakage of the hull and has the effect of improving the boarding feeling of the ship. And since the structure does not need the air chamber is operated only by hydraulic pressure, the structure is simple, there is an effect that can facilitate the installation work.

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

1 is an overall vertical cross-sectional view of the present invention, Figure 2 is a perspective view of the manifold block and the accumulator of the present invention, Figure 3 is an internal configuration of the accumulator of the present invention.

The hydraulic top bracing device 100 of the present invention includes a cylinder 2 fixedly installed on a hull and having an oil chamber 1 partitioned therein; A manifold block (3) installed outside the cylinder (2) to control the flow of oil injected into the oil chamber (1); A piston (4) installed inside the cylinder (2) and linearly reciprocating according to the pressure of oil injected into the oil chamber (1); A piston rod 5 fixed to the other end of the piston 4; One end is fixed to the piston rod (5) and the other end is a flange (6) fixed to the engine; In the conventional top bracing device configured, a first flow passage provided with a non-return valve 7 inside the manifold block 3 is connected to an oil chamber 1 and prevents oil from flowing out of the oil chamber 1. (8) and a relief which is connected between the front end and the rear end of the first flow path 8 and causes the oil in the oil chamber 1 to flow out into the first flow path 8 when the internal pressure of the oil chamber 1 is greater than or equal to the set value. The oil in the oil chamber 1 is connected to the second flow path 10 provided with the valve 9 and between the front end and the rear end of the first flow path 8 and the engine oil flow rate is greater than or equal to the set value. Third flow passages 12, each of which has a solenoid valve 11 for outflow, is partitioned; An accumulator (13) connected to the first flow passage (8) outside the manifold block (3) to supply oil to the oil chamber (1) or to recover oil from the oil chamber (1); When vibration and shock of an engine having a very large amplitude are generated, the relief valve 9 is operated so that the oil in the oil chamber 1 flows out to the accumulator 13 to absorb the vibration and shock, and the engine has a very high frequency. When the vibration and the impact of the solenoid valve 11 is operated so that the oil chamber 1 is characterized in that the oil flows out to the accumulator 13 to absorb the vibration and shock.

The second flow passage 10 is provided with an auxiliary relief valve 14 for safety at the low pressure side.

The third flow passage 12 is provided with a pressure transducer 15 and a pressure gauge 16 to check the pressure of the oil injected into the accumulator 13 and the oil chamber 1, respectively.

The third passage 12 is provided with an alarm 17 for detecting and notifying low pressure.

In the figure, reference numeral 18 is a bushing, 19 is a gasket, and 20 is a bearing.

The hydraulic top bracing apparatus 100 of the present invention configured as described above is installed between the engine and the hull of a large ship to prevent the vibration and shock generated by the engine from being transmitted to the hull as it is, thus preventing the deformation and breakage of the hull. It is a device that performs the function of absorbing vibration and shock along with the function of supporting the engine so as to improve the feeling of boarding.

In particular, the hydraulic top braking device 100 of the present invention is a case where the vibration and shock of the engine having a very large amplitude or when the vibration and shock of the engine having a very high frequency or when the vibration and shock of the engine is weak. The main feature is that the ship can be more adaptively operated while effectively preventing the deformation and breakage of the hull while further improving the boarding feeling of the ship.

And because it is a structure that operates only with oil, without using air, the mechanical strength is improved to improve the accuracy of operation, and the structure is simple, and the facility is also easy to operate.

1 to 3, it is connected to the oil chamber 1 inside the oil chamber 1 to the manifold block 3 of the conventional top bracing apparatus, and oil flows out from the oil chamber 1 to the oil chamber 1. The oil passage 1 is connected between the first flow passage 8 provided with a non-return valve 7 to prevent the flow, and the front end and the rear end of the first flow passage 8 and the internal pressure of the oil chamber 1 is higher than or equal to the set value. ) Is connected between the second flow path 10 provided with a relief valve 9 for draining the oil of the first flow path 8 to the first flow path 8 and between the front end and the rear end of the first flow path 8 and the engine speed is greater than or equal to the set value. The third flow passage 12, each of which is provided with a solenoid valve 11 for discharging the oil of the oil chamber 1 into the first flow passage 8, is partitioned, and the first flow passage 8 is disposed outside the manifold block 3, respectively. ) Is connected to the accumulator 13 to supply the oil to the oil chamber (1) or to recover from the oil chamber (1).

That is, unlike the conventional top bracing device, the third flow path 12 in which the solenoid valve 11 is installed is additionally installed, and thus has a structure in which the high frequency vibration and shock generated immediately after starting the engine or during acceleration are adaptively operated. This is due to the fact that air is not used at all and only oil is used. The operation of this is described in more detail as follows.

First, both the solenoid valve 11 and the relief valve 9 are operated when the oil pressure is about 7 bar, when the ship is operating normally, i.e., when the engine is not immediately started or accelerated or when the ship is not vibrated severely. You will not.

Because solenoid valve 11 operates only when the engine speed is 0 to 10% or 80% to 100% for up to 100%, the relief valve 9 has an oil pressure of about 26 bar (less than 60 engines) or about This is because it only works when the engine is over 40 bar (over 60 engines).

Therefore, since there is no movement of oil between the oil chamber 1 and the accumulator 13, the piston 4 is firmly held so as not to move inside the cylinder 2, in which case the vessel is totally intact. The engine's vibration and impact are not so great.

And, unlike the above, the oil pressure is about 26bar (less than 60 engines) or about 40bar (over 60 engines), the vibration and shock of the engine due to the high waves or sudden change of direction during the normal operation of the vessel occurs with a very large amplitude In this case, the relief valve 9 is operated by sensing the oil pressure.

Then, the oil in the oil chamber 1 passes through the first passage 8 and the second passage 10 in order to flow out to the accumulator 13, and the internal pressure of the oil chamber 1 is equal to the internal pressure of the accumulator 13. Lowered to the same size, the piston (4) is able to move flexibly inside the cylinder (2).

Then, the oil of the accumulator 13 flows back into the oil chamber 1 by the non-return valve 7, and at this time, the piston 4 can move flexibly inside the cylinder 2. The engine is repeated until the vibration and shock of the engine are completely attenuated, and finally, the oil pressure is maintained at a normal state of about 7 bar again.

Therefore, the vibration and impact of the piston (4) in the interior of the cylinder (2) in the case of a vibration and shock having a very large amplitude in the engine due to a high wave or a sudden change of direction during the operation of the vessel and the vibration and The shock can be effectively absorbed and buffered.

In addition, unlike the above, when the engine speed is 0 to 10% or 80% to 100% with respect to the maximum 100%, that is, when the vessel has a very high frequency in the engine immediately after starting or due to acceleration, The solenoid valve 11 is operated by detecting the engine speed.

That is, the solenoid valve 11 is operated when the engine speed is 0 to 10% or 80% to 100%, regardless of the oil hydraulic pressure. Therefore, the oil in the oil chamber 1 passes through the first passage 8 and the third passage 12 in order to flow out to the accumulator 13.

Then, the internal pressure of the oil chamber 1 is lowered to the same size as the internal pressure of the accumulator 13, and the piston 4 can move flexibly inside the cylinder 2. Then, the oil of the accumulator 13 flows back into the oil chamber 1 by the non-return valve 7, and at this time, the piston 4 can move flexibly inside the cylinder 2. The engine is repeated until the vibration and shock of the engine are completely attenuated, and finally, the oil pressure is maintained at a normal state of about 7 bar again.

Therefore, even when vibrations and shocks having a high frequency occur in the engine due to acceleration or the like after the ship's acceleration, the piston 4 is controlled to move flexibly inside the cylinder 2 to effectively absorb and absorb the vibrations and shocks. You can do it.

As described above, the hydraulic top braking device 100 of the present invention operates to adaptively absorb vibrations and shocks of engines generated in various operating situations, thereby effectively absorbing and cushioning the vibrations and shocks of the engines, thereby providing a service life of the ship. It is possible to extend the ship, and the boarding feeling of the ship can be greatly improved.

1 is a full vertical cross-sectional view of the present invention.

Figure 2 is a perspective view of the manifold block and accumulator of the present invention

Figure 3 is an internal configuration of the accumulator of the present invention

※ Explanation of code for main part of drawing

1: oil seal 2: cylinder

3: manifold block 4: piston

5: piston rod 6: flange

7: non-return valve 8: euro 1

9: relief valve 10: second euro

11: solenoid valve 12: third euro

13: Accumulator 14: Auxiliary relief valve

15: pressure transducer 16: pressure gauge

17: alarm 18: bushing

19: gasket 20: bearing

100: hydraulic top bracing device

Claims (1)

A cylinder 2 fixed to the hull and having an oil chamber 1 partitioned therein; A manifold block (3) installed outside the cylinder (2) to control the flow of oil injected into the oil chamber (1); A piston (4) installed inside the cylinder (2) and linearly reciprocating according to the pressure of oil injected into the oil chamber (1); A piston rod 5 fixed to the other end of the piston 4; One end is fixed to the piston rod (5) and the other end is a flange (6) fixed to the engine; In the conventional top bracing device configured, a first flow passage provided with a non-return valve 7 inside the manifold block 3 is connected to an oil chamber 1 and prevents oil from flowing out of the oil chamber 1. (8) and a relief which is connected between the front end and the rear end of the first flow path 8 and causes the oil in the oil chamber 1 to flow out into the first flow path 8 when the internal pressure of the oil chamber 1 is greater than or equal to the set value. The oil in the oil chamber 1 is connected to the second flow path 10 provided with the valve 9 and between the front end and the rear end of the first flow path 8 and the engine oil flow rate is greater than or equal to the set value. Third flow passages 12, each of which has a solenoid valve 11 for outflow, is partitioned; An accumulator (13) connected to the first flow passage (8) outside the manifold block (3) to supply oil to the oil chamber (1) or to recover oil from the oil chamber (1); When vibration and shock of an engine having a very large amplitude are generated, the relief valve 9 is operated so that the oil in the oil chamber 1 flows out to the accumulator 13 to absorb the vibration and shock, and the engine has a very high frequency. When the vibration and the shock of the solenoid valve 11 is operated, the oil chamber (1) is the oil chamber (1), the oil is leaked to the accumulator (13), the hydraulic top braking device, characterized in that to absorb the vibration and shock.

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