CN111776157B - Small ship vibration damping system - Google Patents
Small ship vibration damping system Download PDFInfo
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- CN111776157B CN111776157B CN202010475638.6A CN202010475638A CN111776157B CN 111776157 B CN111776157 B CN 111776157B CN 202010475638 A CN202010475638 A CN 202010475638A CN 111776157 B CN111776157 B CN 111776157B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
Abstract
The utility model provides a small-size boats and ships damping system belongs to hydraulic pressure technical field. The small ship vibration damping system comprises a power unit, a three-position four-way reversing valve, an energy storage unit, a compensation unit and a vibration damping oil cylinder; the power unit comprises a pump set, and an oil inlet of the pump set is communicated with an oil tank of the small ship vibration damping system; the middle position function of the three-position four-way reversing valve is O-shaped, an oil inlet of the three-position four-way reversing valve is communicated with an oil outlet of the pump group, an oil return port of the three-position four-way reversing valve is communicated with an oil tank, a first working oil port of the three-position four-way reversing valve is communicated with a rodless cavity of the vibration damping oil cylinder, and a second working oil port of the three-position four-way reversing valve is communicated with a rod cavity of the vibration damping oil cylinder; the energy storage unit comprises an energy accumulator; the compensation unit comprises a first sequence valve, a two-position two-way reversing valve, a three-position three-way reversing valve, a second sequence valve and a third sequence valve. The present disclosure can reduce the rolling swing of a small vessel when berthing.
Description
Technical Field
The disclosure belongs to the technical field of hydraulic pressure, and particularly relates to a small ship vibration reduction system.
Background
When the small-sized ship is berthed, the small-sized ship has small self draft, so the small-sized ship is easy to rock and swing under the influence of external acting force and a self propelling device. Therefore, the working and living comfort of the crew is greatly influenced.
In the related art, in order to solve this problem, a rubber tire is usually disposed on the dock, and the small ship is abutted against the rubber tire, so that a certain vibration damping effect is achieved.
However, the rubber tires have a limited damping capacity, so that the shaking of the small ships remains serious.
Disclosure of Invention
The embodiment of the disclosure provides a small ship damping system, which can reduce the shaking swing of a small ship during berthing. The technical scheme is as follows:
the embodiment of the disclosure provides a vibration reduction system of a small ship, which comprises a power unit, a three-position four-way reversing valve, an energy storage unit, a compensation unit and a vibration reduction oil cylinder;
the power unit comprises a pump set, and an oil inlet of the pump set is communicated with an oil tank of the small ship vibration damping system;
the middle position function of the three-position four-way reversing valve is O-shaped, an oil inlet of the three-position four-way reversing valve is communicated with an oil outlet of the pump group, an oil return port of the three-position four-way reversing valve is communicated with the oil tank, a first working oil port of the three-position four-way reversing valve is communicated with a rodless cavity of the vibration damping oil cylinder, and a second working oil port of the three-position four-way reversing valve is communicated with a rod cavity of the vibration damping oil cylinder;
the energy storage unit comprises an energy accumulator;
the compensation unit comprises a first sequence valve, a two-position two-way reversing valve, a three-position three-way reversing valve, a second sequence valve and a third sequence valve, an oil inlet and a first control oil port of the first sequence valve are communicated with the energy accumulator, a second control oil port of the first sequence valve is communicated with a first working oil port of the three-position four-way reversing valve, an oil outlet of the first sequence valve is communicated with a control oil port of the two-position two-way reversing valve, an oil inlet of the two-position two-way reversing valve is communicated with the energy accumulator, an oil outlet of the two-position two-way reversing valve is communicated with a rodless cavity of the vibration damping oil cylinder, a first oil port of the three-position three-way reversing valve is communicated with a rodless cavity of the vibration damping oil cylinder, a second oil port of the three-position three-way reversing valve is communicated with a rod cavity of the vibration damping oil cylinder, and a third oil port of the three-position three-way reversing valve is communicated with the energy accumulator, the oil inlet and the first control oil port of the second sequence valve are communicated with the rodless cavity of the vibration damping oil cylinder, the oil outlet of the second sequence valve is communicated with the first control oil port of the three-position three-way reversing valve, the second control oil port of the second sequence valve is communicated with the energy accumulator, the oil inlet and the first control oil port of the third sequence valve are communicated with the rod cavity of the vibration damping oil cylinder, the oil outlet of the third sequence valve is communicated with the second control oil port of the three-position three-way reversing valve, and the second control oil port of the third sequence valve is communicated with the energy accumulator.
In an implementation manner of the present disclosure, the compensation unit further includes a first check valve and a second check valve, oil inlets of the first check valve and the second check valve are both communicated with the oil tank, an oil outlet of the first check valve is communicated with the rodless cavity of the damping oil cylinder, and an oil outlet of the second check valve is communicated with the rod cavity of the damping oil cylinder.
In another implementation manner of the disclosure, the power unit further includes a two-position three-way reversing valve, a first oil inlet of the two-position three-way reversing valve is communicated with an oil outlet of the pump group, and an oil outlet of the two-position three-way reversing valve is communicated with the oil tank.
In another implementation manner of the present disclosure, the power unit further includes a first overflow valve, an oil inlet and a control oil port of the first overflow valve are both communicated with an oil outlet of the pump set, and an oil outlet of the first overflow valve is respectively communicated with the oil tank and a second oil inlet of the two-position three-way reversing valve.
In yet another implementation of the present disclosure, the two-position, three-way directional valve is a solenoid valve.
In another implementation manner of the present disclosure, the power unit further includes a third one-way valve, an oil inlet of the third one-way valve is communicated with the pump set, and an oil outlet of the third one-way valve is communicated with an oil inlet of the three-position four-way reversing valve.
In another implementation manner of the present disclosure, the energy storage unit further includes a first cut-off valve, and the first cut-off valve is configured to communicate or cut off a third oil port of the energy accumulator and the three-position three-way directional control valve, a second control oil port of the energy accumulator and the second sequence valve, a second control oil port of the energy accumulator and the third sequence valve, an oil inlet and a first control oil port of the energy accumulator and the first sequence valve, and an oil path between the energy accumulator and an oil inlet of the two-position two-way directional control valve.
In still another implementation manner of the present disclosure, the energy storage unit further includes a second stop valve, a first oil port of the second stop valve is communicated with an oil path between the first stop valve and the energy accumulator, and a second oil port of the second stop valve is communicated with the oil tank.
In another implementation manner of the present disclosure, the energy storage unit further includes a second overflow valve, an oil inlet and a control oil port of the second overflow valve are both communicated with the oil path between the first stop valve and the energy accumulator, and an oil outlet of the second overflow valve is communicated with the oil tank.
In yet another implementation of the present disclosure, the three-position, four-way reversing valve is a solenoid valve.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
when the small-sized ship is berthed, a piston rod of the vibration reduction oil cylinder is fixed on the wharf. The three-position four-way reversing valve is adjusted to work at the right position, and hydraulic oil output by the pump set sequentially passes through the oil inlet of the three-position four-way reversing valve and the first working oil port to enter the rodless cavity of the vibration reduction oil cylinder, so that the piston rod of the vibration reduction oil cylinder extends out to tightly press the ship at a fixed position. After the compaction is finished, the three-position four-way reversing valve is adjusted to be in the middle position to work, and the middle position function of the three-position four-way reversing valve is O-shaped, so that an oil inlet and an oil return port of the three-position four-way reversing valve are not communicated with the first working oil port and the second working oil port, the power unit does not influence the compensation unit, and the small ship vibration damping system finishes the preparation work and is in a normal working state.
When the small ship does not shake and swing to a large extent, the pressure of the rod cavity and the rodless cavity of the damping oil cylinder is low, so that the pressure is not enough to turn off the first sequence valve and turn on the second sequence valve and the third sequence valve. And hydraulic oil in the energy accumulator enters a control oil port of the two-position two-way reversing valve through the first sequence valve, so that the two-position two-way reversing valve is also opened. Therefore, hydraulic oil in the energy accumulator sequentially enters the rodless cavity of the vibration damping oil cylinder through the oil inlet and the oil outlet of the two-position two-way reversing valve, so that the piston rod of the vibration damping oil cylinder always extends out, and the ship is tightly pressed at a fixed position.
When the small ship shakes and swings to a greater extent, the pressure of the rod cavity or the rodless cavity of the damping oil cylinder is increased. If the pressure of the rodless cavity of the damping oil cylinder is increased, the pressure is enough to close the first sequence valve and open the second sequence valve. And a part of hydraulic oil in a rodless cavity of the damping oil cylinder flows into a first control oil port of the three-position three-way reversing valve through the second sequence valve, so that the left position of the three-position three-way reversing valve works. And the other part of the hydraulic oil in the rodless cavity of the damping oil cylinder sequentially passes through the first oil port and the third oil port of the three-position three-way reversing valve and finally enters the energy accumulator, so that the energy accumulator is charged, and the impact of the damping oil cylinder is absorbed. If the pressure of the rod cavity of the damping oil cylinder is increased, the pressure is enough to open the third sequence valve. And a part of hydraulic oil in a rod cavity of the damping oil cylinder flows into a second control oil port of the three-position three-way reversing valve through the third sequence valve, so that the right position of the three-position three-way reversing valve works. And the other part of the hydraulic oil in the rod cavity of the damping oil cylinder sequentially passes through the second oil port and the third oil port of the three-position three-way reversing valve and finally enters the energy accumulator, so that the energy accumulator is charged, and the impact of the damping oil cylinder is absorbed.
And when the docking of the small ship is finished, the connection between the piston rod of the damping oil cylinder and the dock is released. The three-position four-way reversing valve is adjusted to work at the left position, and hydraulic oil output by the pump set sequentially passes through the oil inlet of the three-position four-way reversing valve and the second working oil port to enter the rod cavity of the vibration damping oil cylinder, so that the piston rod of the vibration damping oil cylinder is retracted, and normal navigation is facilitated.
That is to say, the small ship vibration damping system that this disclosed embodiment provided can effectually reduce the rock swing of small ship when berthing, improves the travelling comfort of small ship.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a hydraulic diagram of a small vessel damping system provided by an embodiment of the present disclosure.
The symbols in the drawings represent the following meanings:
1. a power unit; 11. a pump group; 12. a two-position three-way reversing valve; 13. a first overflow valve; 14. a third check valve; 2. a three-position four-way reversing valve; 3. an energy storage unit; 31. an accumulator; 32. a first shut-off valve; 33. a second stop valve; 34. a second overflow valve; 4. a compensation unit; 41. a first sequence valve; 42. a two-position two-way directional valve; 43. a three-position three-way reversing valve; 44. a second sequence valve; 45. a third sequence valve; 46. a first check valve; 47. a second one-way valve; 5. a vibration damping oil cylinder; 100. and an oil tank.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
A small vessel refers to a vessel with a low draft. When the small-sized ship is berthed, the small-sized ship has small self draft, so the small-sized ship is easy to rock and swing under the influence of external acting force and a self propelling device. Therefore, the working and living comfort of the crew is greatly influenced. In the related art, although a rubber tire is disposed on a dock for damping a ship, the effect is limited.
In order to solve the problem, the embodiment of the present disclosure provides a small ship damping system, as shown in fig. 1, the small ship damping system includes a power unit 1, a three-position four-way directional valve 2, an energy storage unit 3, a compensation unit 4, and a damping cylinder 5.
The power unit 1 comprises a pump set 11, and an oil inlet of the pump set 11 is communicated with an oil tank 100 of a small ship vibration damping system.
The middle position function of the three-position four-way reversing valve 2 is O-shaped, an oil inlet p of the three-position four-way reversing valve 2 is communicated with an oil outlet of the pump group 11, an oil return port t of the three-position four-way reversing valve 2 is communicated with an oil tank 100, a first working oil port a of the three-position four-way reversing valve 2 is communicated with a rodless cavity of the vibration damping oil cylinder 5, and a second working oil port b of the three-position four-way reversing valve 2 is communicated with a rod cavity of the vibration damping oil cylinder 5.
The energy storage unit 3 comprises an energy storage 31.
The compensation unit 4 comprises a first sequence valve 41, a two-position, two-way directional valve 42, a three-position, three-way directional valve 43, a second sequence valve 44 and a third sequence valve 45.
An oil inlet a and a first control oil port of a first sequence valve 41 are communicated with an energy accumulator 31, a second control oil port of the first sequence valve 41 is communicated with a first working oil port a of a three-position four-way reversing valve 2, an oil outlet b of the first sequence valve 41 is communicated with a control oil port of a two-position two-way reversing valve 42, an oil inlet a of the two-position two-way reversing valve 42 is communicated with the energy accumulator 31, an oil outlet b of the two-position two-way reversing valve 42 is communicated with a rodless cavity of a damping oil cylinder 5, a first oil port a of a three-position three-way reversing valve 43 is communicated with a rodless cavity of the damping oil cylinder 5, a second oil port b of the three-position three-way reversing valve 43 is communicated with a rod cavity of the damping oil cylinder 5, a third oil port c of the three-position three-way reversing valve 43 is communicated with the energy accumulator 31, an oil inlet a and a first control oil port of a second sequence valve 44 are communicated with a rodless cavity of the damping oil cylinder 5, an oil outlet b of a second sequence valve 44 is communicated with a first control oil port of the three-position three-way reversing valve 43, a second control oil port of the second sequence valve 44 is communicated with the energy accumulator 31, an oil inlet a and a first control oil port of the third sequence valve 45 are both communicated with a rod cavity of the damping oil cylinder 5, an oil outlet b of the third sequence valve 45 is communicated with a second control oil port of the three-position three-way reversing valve 43, and a second control oil port of the third sequence valve 45 is communicated with the energy accumulator 31.
When the small-sized ship is berthed, a piston rod of the vibration reduction oil cylinder 5 is fixed on the wharf. The three-position four-way reversing valve 2 is adjusted to work at the right position, and hydraulic oil output by the pump set 11 sequentially enters a rodless cavity of the vibration damping oil cylinder 5 through an oil inlet p and a first working oil port a of the three-position four-way reversing valve 2, so that a piston rod of the vibration damping oil cylinder 5 extends out to tightly press a ship at a fixed position.
After the compaction is finished, the three-position four-way reversing valve 2 is adjusted to be in a middle position for working, and the middle position of the three-position four-way reversing valve 2 can be in an O shape, so that an oil inlet p and an oil return port t of the three-position four-way reversing valve 2 are not communicated with the first working oil port a and the second working oil port b, the power unit 1 does not influence the compensation unit 4, and the small ship vibration damping system at the moment completes preparation work and is in a normal working state.
When the small vessel is not swaying to a great extent, the rod and rodless chambers of the damping cylinder 5 are at a low pressure, so that the pressure is not sufficient to close the first sequence valve 41 and to open the second sequence valve 44 and the third sequence valve 45. The hydraulic oil in the accumulator 31 enters the control port of the two-position two-way selector valve 42 through the first sequence valve 41, so that the two-position two-way selector valve 42 is also opened. In this way, the hydraulic oil in the accumulator 31 sequentially passes through the oil inlet a and the oil outlet b of the two-position two-way directional valve 42 to enter the rodless cavity of the damping cylinder 5, so that the piston rod of the damping cylinder 5 is always extended, and the ship is tightly pressed at a fixed position.
When the small ship shakes and swings to a large extent, the pressure of the rod cavity or the rodless cavity of the damping oil cylinder 5 is increased. If the rodless chamber pressure of the damping cylinder 5 increases, the pressure is sufficient to close the first sequence valve 41 and open the second sequence valve 44. A part of the hydraulic oil in the rodless cavity of the damping cylinder 5 flows into the first control oil port of the three-position three-way directional valve 43 through the second sequence valve 44, so that the left position of the three-position three-way directional valve 43 works. The other part of the hydraulic oil in the rodless cavity of the damping cylinder 5 sequentially passes through the first oil port a and the third oil port c of the three-position three-way reversing valve 43 and finally enters the energy accumulator 31, so that the energy accumulator 31 is charged, and the impact of the damping cylinder 5 is absorbed.
If the rod chamber pressure of the damping cylinder 5 increases, the pressure is sufficient to open the third sequence valve 45. A part of the hydraulic oil in the rod chamber of the damping cylinder 5 flows into the second control oil port of the three-position three-way directional valve 43 through the third sequence valve 45, so that the right position of the three-position three-way directional valve 43 works. The other part of the hydraulic oil in the rod cavity of the damping oil cylinder 5 sequentially passes through the second oil port b and the third oil port c of the three-position three-way reversing valve 43 and finally enters the energy accumulator 31, so that the energy accumulator 31 is charged, and the impact of the damping oil cylinder 5 is absorbed.
And when the small ship is berthed, the connection between the piston rod of the damping oil cylinder 5 and the wharf is released. The three-position four-way reversing valve 2 is adjusted to be in left-position operation, hydraulic oil output by the pump set 11 sequentially passes through the oil inlet p and the second working oil port b of the three-position four-way reversing valve 2 to enter the rod cavity of the vibration damping oil cylinder 5, so that a piston rod of the vibration damping oil cylinder 5 is retracted, and normal navigation is facilitated.
That is to say, the small ship vibration damping system that this disclosed embodiment provided can effectually reduce the rock swing of small ship when berthing, improves the travelling comfort of small ship.
In this embodiment, the three-position, four-way selector valve 2 is a solenoid valve.
Therefore, the electronic control of the three-position four-way reversing valve 2 can be realized, and the automatic design of a small ship vibration damping system is facilitated.
Of course, in other embodiments, the control means of the three-position four-way reversing valve 2 may also be adjusted according to actual requirements, such as hydraulic control, manual operation, etc., which is not limited by the present disclosure.
Continuing to refer to fig. 1, in this embodiment, the compensation unit further includes a first check valve 46 and a second check valve 47, oil inlets of the first check valve 46 and the second check valve 47 are both communicated with the oil tank 100, an oil outlet of the first check valve 46 is communicated with the rodless cavity of the damping oil cylinder 5, and an oil outlet of the second check valve 47 is communicated with the rod cavity of the damping oil cylinder 5.
On the one hand, the first check valve 46 and the second check valve 47 may function as oil supply for the damper cylinder 5.
For example, when the rodless chamber of the damper cylinder 5 is starved of oil, the pressure in the rodless chamber of the damper cylinder 5 will be less than the pressure in the oil tank 100, so that the hydraulic oil in the oil tank 100 is automatically replenished into the rodless chamber of the damper cylinder. Based on the same reason, when the rod cavity of the damping oil cylinder 5 is out of oil, the pressure in the rod cavity of the damping oil cylinder 5 is smaller than the pressure in the oil tank 100, so that the hydraulic oil in the oil tank 100 is automatically supplemented into the rod cavity of the damping oil cylinder.
On the other hand, the first check valve 46 and the second check valve 47 also provide back pressure to the entire compensating unit 4.
Continuing with FIG. 1, power unit 1 is described as follows:
in this embodiment, the power unit 1 further includes a two-position three-way directional valve 12, a first oil inlet a of the two-position three-way directional valve 12 is communicated with an oil outlet of the pump group 11, and an oil outlet b of the two-position three-way directional valve 12 is communicated with the oil tank 100.
In the above implementation, the two-position three-way directional valve 12 is used to switch between the high-pressure state and the low-pressure state of the pump group 11.
For example, if the pump set 11 needs to be in a low-pressure state, the two-position three-way directional valve 12 works in a lower position, and at this time, the first oil inlet a and the oil outlet b of the two-position three-way directional valve 12 are communicated, so that the hydraulic oil output by the pump set 11 flows back to the oil tank 100, and the pump set 11 is in the low-pressure state. If the pump set 11 is in a high-pressure state, the two-position three-way reversing valve 12 works in an upper position, and at the moment, the first oil inlet a and the oil outlet b of the two-position three-way reversing valve 12 are closed, so that hydraulic oil output by the pump set 11 is output outwards, and the pump set 11 is in a high-pressure state.
Alternatively, the two-position, three-way reversing valve 12 is a solenoid valve.
Thus, the two-position three-way reversing valve 12 can be controlled by power on or power off. For example, when the two-position three-way reversing valve 12 is de-energized, the two-position three-way reversing valve 12 works at the lower position, and the pump set 11 is in the low-pressure state. When the two-position three-way reversing valve 12 is electrified, the two-position three-way reversing valve 12 works at an upper position, and the pump set 11 is in a high-pressure state.
Of course, in other embodiments, the control means of the two-position three-way directional valve 12 can be adjusted according to actual requirements, such as hydraulic control, manual control, etc., which is not limited by the present disclosure.
In this embodiment, the power unit 1 further includes a first overflow valve 13, an oil inlet a and a control oil port of the first overflow valve 13 are both communicated with an oil outlet of the pump group 11, and an oil outlet b of the first overflow valve 13 is respectively communicated with the oil tank 100 and a second oil inlet c of the two-position three-way reversing valve 12.
In the above implementation, the first overflow valve 13 and the two-position three-way reversing valve 12 are used together. When the pump set 11 is in a high-pressure state through the two-position three-way reversing valve 12, if the output pressure of the pump set 11 is too high, the first overflow valve 13 is opened, so that the hydraulic oil output by the pump set 11 is drained to the oil tank 100.
Furthermore, by adjusting the threshold value of the first relief valve 13, it is also possible to achieve control of the maximum output pressure of the pump stack 11.
In this embodiment, the power unit 1 further includes a third check valve 14, an oil inlet of the third check valve 14 is communicated with the pump set 11, and an oil outlet of the third check valve 14 is communicated with an oil inlet p of the three-position four-way reversing valve 2.
In the above-described implementation, the third check valve 14 is used to prevent the hydraulic oil from flowing back into the pump group 11 after the pump group 11 stops operating, improving the reliability of the power unit 1.
The energy storage unit 3 is described below with continued reference to fig. 1:
in this embodiment, the energy storage unit 3 further includes a first cut-off valve 32, and the first cut-off valve 32 is configured to connect or cut off the oil passages between the energy accumulator 31 and the third oil port c of the three-position three-way reversing valve 43, the second control oil ports between the energy accumulator 31 and the second sequence valve 44, the second control oil ports between the energy accumulator 31 and the third sequence valve 45, the oil inlets a and the first control oil ports of the energy accumulator 31 and the first sequence valve 41, and the oil passages between the energy accumulator 31 and the oil inlets a of the two-position two-way reversing valve 42.
In the above-described implementation, the first shut-off valve 32 is a service valve of the energy storage unit 3. When the accumulator 31 needs to be maintained, the first stop valve 32 can be closed, so that convenience is provided for maintenance, and environmental pollution caused by leakage of hydraulic oil is avoided. It will be readily appreciated that the first shut-off valve 32 is always in an open state during normal operation.
In the present embodiment, the energy storage unit 3 further includes a second cut-off valve 33, a first oil port of the second cut-off valve 33 is communicated with the oil passage between the first cut-off valve 32 and the accumulator 31, and a second oil port of the second cut-off valve 33 is communicated with the oil tank 100.
In the above implementation, the second stop valve 33 is a drain valve of the energy storage unit 3, and when the hydraulic oil in the energy storage 31 needs to be drained, the second stop valve 33 is opened, so that the hydraulic oil in the energy storage 31 can be drained to the oil tank 100. It will be readily appreciated that the second shut-off valve 33 is always open during normal operation.
Alternatively, both the first and second stop valves 32 and 33 may be manual stop valves, so that the first and second stop valves 32 and 33 can have high reliability.
In the present embodiment, the energy storage unit 3 further includes a second overflow valve 34, an oil inlet a and a control oil port of the second overflow valve 34 are both communicated with the oil path between the first stop valve 32 and the energy storage 31, and an oil outlet b of the second overflow valve 34 is communicated with the oil tank 100.
In the above implementation, the second relief valve 34 is a relief valve of the accumulator unit 3, and when the pressure of the accumulator 31 is too high, the second relief valve 34 opens, so that the hydraulic oil in the accumulator 31 is relieved into the oil tank 100, thereby avoiding the pressure in the accumulator 31 from being too high.
Further, by adjusting the threshold value of the second relief valve 34, it is also possible to control the maximum charging pressure of the accumulator 31.
The working mode of the small ship damping system provided by the embodiment of the disclosure is described as follows:
when the small-sized ship is berthed, a piston rod of the vibration reduction oil cylinder 5 is fixed on the wharf. The three-position four-way reversing valve 2 is adjusted to work at the right position, and hydraulic oil output by the pump set 11 sequentially enters a rodless cavity of the vibration damping oil cylinder 5 through an oil inlet p and a first working oil port a of the three-position four-way reversing valve 2, so that a piston rod of the vibration damping oil cylinder 5 extends out to tightly press a ship at a fixed position.
After the compaction is finished, the three-position four-way reversing valve 2 is adjusted to be in a middle position for working, and the middle position of the three-position four-way reversing valve 2 can be in an O shape, so that an oil inlet p and an oil return port t of the three-position four-way reversing valve 2 are not communicated with the first working oil port a and the second working oil port b, the power unit 1 does not influence the compensation unit 4, and the small ship vibration damping system at the moment completes preparation work and is in a normal working state.
When the small vessel is not swaying to a great extent, the rod and rodless chambers of the damping cylinder 5 are at a low pressure, so that the pressure is not sufficient to close the first sequence valve 41 and to open the second sequence valve 44 and the third sequence valve 45. The hydraulic oil in the accumulator 31 enters the control port of the two-position two-way selector valve 42 through the first sequence valve 41, so that the two-position two-way selector valve 42 is also opened. In this way, the hydraulic oil in the accumulator 31 sequentially passes through the oil inlet a and the oil outlet b of the two-position two-way directional valve 42 to enter the rodless cavity of the damping cylinder 5, so that the piston rod of the damping cylinder 5 is always extended, and the ship is tightly pressed at a fixed position.
When the small ship shakes and swings to a large extent, the pressure of the rod cavity or the rodless cavity of the damping oil cylinder 5 is increased. If the rodless chamber pressure of the damping cylinder 5 increases, the pressure is sufficient to close the first sequence valve 41 and open the second sequence valve 44. A part of the hydraulic oil in the rodless cavity of the damping cylinder 5 flows into the first control oil port of the three-position three-way directional valve 43 through the second sequence valve 44, so that the left position of the three-position three-way directional valve 43 works. The other part of the hydraulic oil in the rodless cavity of the damping cylinder 5 sequentially passes through the first oil port a and the third oil port c of the three-position three-way reversing valve 43 and finally enters the energy accumulator 31, so that the energy accumulator 31 is charged, and the impact of the damping cylinder 5 is absorbed.
If the rod chamber pressure of the damping cylinder 5 increases, the pressure is sufficient to open the third sequence valve 45. A part of the hydraulic oil in the rod chamber of the damping cylinder 5 flows into the second control oil port of the three-position three-way directional valve 43 through the third sequence valve 45, so that the right position of the three-position three-way directional valve 43 works. The other part of the hydraulic oil in the rod cavity of the damping oil cylinder 5 sequentially passes through the second oil port b and the third oil port c of the three-position three-way reversing valve 43 and finally enters the energy accumulator 31, so that the energy accumulator 31 is charged, and the impact of the damping oil cylinder 5 is absorbed.
And when the small ship is berthed, the connection between the piston rod of the damping oil cylinder 5 and the wharf is released. The three-position four-way reversing valve 2 is adjusted to be in left-position operation, hydraulic oil output by the pump set 11 sequentially passes through the oil inlet p and the second working oil port b of the three-position four-way reversing valve 2 to enter the rod cavity of the vibration damping oil cylinder 5, so that a piston rod of the vibration damping oil cylinder 5 is retracted, and normal navigation is facilitated.
That is to say, the small ship vibration damping system that this disclosed embodiment provided can effectually reduce the rock swing of small ship when berthing, improves the travelling comfort of small ship.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A small ship vibration damping system is characterized by comprising a power unit (1), a three-position four-way reversing valve (2), an energy storage unit (3), a compensation unit (4) and a vibration damping oil cylinder (5);
the power unit (1) comprises a pump set (11), and an oil inlet of the pump set (11) is communicated with an oil tank (100) of a small ship vibration damping system;
the middle position function of the three-position four-way reversing valve (2) is O-shaped, an oil inlet of the three-position four-way reversing valve (2) is communicated with an oil outlet of the pump group (11), an oil return port of the three-position four-way reversing valve (2) is communicated with the oil tank (100), a first working oil port of the three-position four-way reversing valve (2) is communicated with a rodless cavity of the vibration damping oil cylinder (5), and a second working oil port of the three-position four-way reversing valve (2) is communicated with a rod cavity of the vibration damping oil cylinder (5);
the energy storage unit (3) comprises an energy storage (31);
the compensation unit (4) comprises a first sequence valve (41), a two-position two-way reversing valve (42), a three-position three-way reversing valve (43), a second sequence valve (44) and a third sequence valve (45), an oil inlet and a first control oil port of the first sequence valve (41) are communicated with the energy accumulator (31), a second control oil port of the first sequence valve (41) is communicated with a first working oil port of the three-position four-way reversing valve (2), an oil outlet of the first sequence valve (41) is communicated with a control oil port of the two-position two-way reversing valve (42), an oil inlet of the two-position two-way reversing valve (42) is communicated with the energy accumulator (31), an oil outlet of the two-position two-way reversing valve (42) is communicated with a rodless cavity of the damping oil cylinder (5), a first oil port of the three-position three-way reversing valve (43) is communicated with a rodless cavity of the damping oil cylinder (5), a second oil port of the three-position three-way reversing valve (43) is communicated with a rod cavity of the damping oil cylinder (5), a third oil port of the three-position three-way reversing valve (43) is communicated with the energy accumulator (31), an oil inlet and a first control oil port of the second sequence valve (44) are both communicated with a rodless cavity of the damping oil cylinder (5), an oil outlet of the second sequence valve (44) is communicated with a first control oil port of the three-position three-way reversing valve (43), a second control oil port of the second sequence valve (44) is communicated with the accumulator (31), an oil inlet and a first control oil port of the third sequence valve (45) are communicated with a rod cavity of the damping oil cylinder (5), an oil outlet of the third sequence valve (45) is communicated with a second control oil port of the three-position three-way reversing valve (43), and a second control oil port of the third sequence valve (45) is communicated with the energy accumulator (31).
2. The small-vessel vibration damping system according to claim 1, characterized in that the compensation unit (4) further comprises a first check valve (46) and a second check valve (47), oil inlets of the first check valve (46) and the second check valve (47) are both communicated with the oil tank (100), an oil outlet of the first check valve (46) is communicated with a rodless cavity of the vibration damping cylinder (5), and an oil outlet of the second check valve (47) is communicated with a rod cavity of the vibration damping cylinder (5).
3. The small-sized ship vibration damping system according to claim 1, wherein the power unit (1) further comprises a two-position three-way reversing valve (12), a first oil inlet of the two-position three-way reversing valve (12) is communicated with an oil outlet of the pump group (11), and an oil outlet of the two-position three-way reversing valve (12) is communicated with the oil tank (100).
4. The small ship vibration damping system according to claim 3, wherein the power unit (1) further comprises a first overflow valve (13), an oil inlet and a control oil port of the first overflow valve (13) are both communicated with an oil outlet of the pump set (11), and an oil outlet of the first overflow valve (13) is respectively communicated with the oil tank (100) and a second oil inlet of the two-position three-way reversing valve (12).
5. A small vessel vibration canceling system according to claim 3, wherein said two-position, three-way directional control valve (12) is a solenoid valve.
6. The small-sized ship vibration damping system according to claim 1, wherein the power unit (1) further comprises a third one-way valve (14), an oil inlet of the third one-way valve (14) is communicated with the pump set (11), and an oil outlet of the third one-way valve (14) is communicated with an oil inlet of the three-position four-way reversing valve (2).
7. The small vessel damping system according to claim 1, characterized in that the energy storage unit (3) further comprises a first shut-off valve (32), and the first shut-off valve (32) is used for communicating or shutting off a third oil port of the energy accumulator (31) and the three-position three-way directional valve (43), a second control oil port of the energy accumulator (31) and the second sequence valve (44), a second control oil port of the energy accumulator (31) and the third sequence valve (45), an oil inlet and a first control oil port of the energy accumulator (31) and the first sequence valve (41), and an oil passage between the energy accumulator (31) and an oil inlet of the two-position two-way directional valve (42).
8. The small watercraft damping system according to claim 7, characterized in that the energy storage unit (3) further comprises a second stop valve (33), a first oil port of the second stop valve (33) communicating with the oil circuit between the first stop valve (32) and the energy storage (31), a second oil port of the second stop valve (33) communicating with the oil tank (100).
9. The small vessel vibration damping system according to claim 7, characterized in that the energy storage unit (3) further comprises a second overflow valve (34), an oil inlet and a control oil outlet of the second overflow valve (34) are both communicated with the oil path between the first shut-off valve (32) and the energy accumulator (31), and an oil outlet of the second overflow valve (34) is communicated with the oil tank (100).
10. Small vessel vibration damping system according to any of claims 1-9, characterized in that the three-position, four-way reversing valve (2) is a solenoid valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010475638.6A CN111776157B (en) | 2020-05-29 | 2020-05-29 | Small ship vibration damping system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010475638.6A CN111776157B (en) | 2020-05-29 | 2020-05-29 | Small ship vibration damping system |
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| CN111776157B true CN111776157B (en) | 2021-12-28 |
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| CN109139583A (en) * | 2018-10-23 | 2019-01-04 | 河南垣发专用车辆集团有限公司 | A kind of forklift hydraulic control system |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10196704A (en) * | 1997-01-16 | 1998-07-31 | Mitsubishi Heavy Ind Ltd | Damper |
| CN201538425U (en) * | 2009-07-22 | 2010-08-04 | 射阳远洋船舶辅机有限公司 | Hydraulic control system for stabilizing fin |
| CN104918851A (en) * | 2013-12-27 | 2015-09-16 | 特许机器株式会社 | Ship-engine damping device |
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| CN111776157A (en) | 2020-10-16 |
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