CN119143041A - Self-energy storage device and method applied to mooring constant tension - Google Patents
Self-energy storage device and method applied to mooring constant tension Download PDFInfo
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- CN119143041A CN119143041A CN202411649596.8A CN202411649596A CN119143041A CN 119143041 A CN119143041 A CN 119143041A CN 202411649596 A CN202411649596 A CN 202411649596A CN 119143041 A CN119143041 A CN 119143041A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003921 oil Substances 0.000 claims abstract description 91
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 58
- 230000008569 process Effects 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/024—Pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the technical field of ship mooring systems, and discloses a self-energy storage device and method applied to constant tension mooring, wherein the self-energy storage device comprises a hydraulic cylinder, a piston pull rod of the hydraulic cylinder is connected with one end of a cable, an energy storage module comprises a first energy storage device and a second energy storage device, the volume of the second energy storage device is larger than that of the first energy storage device, the maximum pressure of the first energy storage device is set to be larger than that of the second energy storage device, the first energy storage device and the second energy storage device are respectively connected with an oil cavity of the hydraulic cylinder through a hydraulic pipeline, the first energy storage device and the second energy storage device are connected through the hydraulic pipeline, the pressure in the hydraulic cylinder is adjusted through the hydraulic oil quantity in the hydraulic cylinder adjusted through the first energy storage device and the second energy storage device, and the tension in the cable is enabled to be constant within a preset value during operation. The invention solves the problems of additional energy consumption, cable tension and insufficient elongation required by constant tension provided by ship mooring by storing the self-generated energy of ship motion.
Description
Technical Field
The invention relates to the technical field of ship mooring systems, in particular to a self-energy storage device and method applied to constant tension mooring.
Background
With the upsizing of ships, mooring safety of ships has become one of important factors constituting accidents and risks of ships. The mooring of the ship is mainly configured and controlled by means of equipment such as a mooring rope, a mooring machine, a bollard, a cable outlet hole, a guide roller and the like. After the ships are large, the forces required to be controlled by the equipment are very large, and the adjustment amplitude of the forces by different control methods and capacities is very large, so that the forces can be controlled more reasonably by reasonable equipment and mooring schemes, and the risks and accidents of the ships during mooring are reduced.
The equipment for controlling the stress of the mooring rope of the ship is mainly a strander and a cable pile.
The stress of the control cable of the cable winch can be divided into three types, namely manual braking by a cable winch brake pad, the force generated by the control cable is hereinafter referred to as braking force, automatic braking by an oil pump constant tension control cable keeps certain tension, the force generated by the control cable is hereinafter referred to as constant tension, and the force generated in the process of manually adjusting the cable is referred to as cable car twisting force.
The constant tension is characterized in that constant tension is provided for the mooring rope when the ship is stationary, and the length of the mooring rope is adjusted to keep the stability of the ship under the condition that the ship moves back and forth and moves outwards.
The prior art provides constant tension for the cable by using external energy, namely, a hydraulic pump station is used, so that the method needs to consume fuel or electric energy additionally, and meanwhile, noise and vibration are generated when the hydraulic pump station works, thereby influencing the environment;
In addition, because the design of the existing constant tension system has a certain adjusting range, and the corresponding speed is insufficient due to the hysteresis effect of the controller and the sensor of the hydraulic system, when the movement amplitude of the ship or the external force change exceeds the range, the system can not timely and effectively adjust the tension and the length of the mooring rope.
It is therefore necessary to devise a method and apparatus for automatically storing and utilizing the energy of a ship which allows greater elongation (2-3 meters) and tension stability of the rope under greater stress (30-50 tons) while reducing energy consumption.
Disclosure of Invention
In order to solve the technical problems, the invention provides a self-energy storage device and a self-energy storage method applied to mooring constant tension, and solves the problems of additional energy consumption, cable tension and insufficient elongation required by the constant tension provided by ship mooring by storing the self-generated energy of ship motion.
In a first aspect, a first object of the present invention is to provide a self-accumulating device for mooring constant tension, comprising:
The piston pull rod of the hydraulic cylinder is connected with one end of the mooring rope;
The energy storage module comprises a first energy storage device and a second energy storage device, wherein the volume of the second energy storage device is larger than that of the first energy storage device, and the maximum pressure of the first energy storage device is set to be larger than that of the second energy storage device;
The first energy accumulator and the second energy accumulator are respectively connected with an oil cavity of the hydraulic cylinder through a hydraulic pipeline;
the hydraulic oil quantity in the hydraulic cylinder is adjusted through the first energy accumulator and the second energy accumulator to adjust the pressure in the hydraulic cylinder, so that the tension in the cable is kept within a preset value during working.
Further, the energy storage module further includes:
The first check valve is arranged between the first accumulator and the hydraulic cylinder and is used for controlling whether the hydraulic oil in the oil cavity is transmitted to the first accumulator or not;
the second one-way valve is arranged between the second energy accumulator and the hydraulic cylinder and used for controlling whether hydraulic oil in the second energy accumulator is transmitted into the oil cavity;
the first overflow valve is arranged on a hydraulic pipeline between the first energy accumulator and the second energy accumulator and is used for controlling the maximum pressure in the first energy accumulator;
The second overflow valve is connected with the second energy accumulator through a hydraulic pipeline and is used for controlling the maximum pressure in the second energy accumulator;
and the oil tank is connected with the second overflow valve and used for storing hydraulic oil from the second energy accumulator.
Further, the method further comprises the following steps:
and a third check valve is arranged on the hydraulic pipeline between the oil tank and the oil cavity and is used for controlling whether hydraulic oil in the oil tank is transmitted into the oil cavity.
Furthermore, a third overflow valve is arranged on the hydraulic pipeline between the second energy accumulator and the oil cavity and used for stabilizing the pressure at the outlet of the second energy accumulator.
Further, the first overflow valve is a pilot type overflow valve, and the second overflow valve is a direct-acting overflow valve.
Further, the device is fastened to the vessel by means of bolts.
In a second aspect, a second object of the present invention is to provide a self-accumulating method for mooring constant tension, comprising:
S1, connecting the hydraulic cylinder with a cable, and installing the device on a ship;
s2, when the cable is stretched, the piston pull rod moves outwards, and hydraulic oil enters the first accumulator from the oil cavity;
and S3, if the cable is not stretched continuously, carrying out S4, if the cable is stretched continuously, hydraulic oil enters the second accumulator from the first accumulator when the pressure in the first accumulator reaches the set maximum pressure, storing the hydraulic oil, and if the pressure in the second accumulator reaches the set maximum pressure, the hydraulic oil enters the oil tank from the second accumulator.
S4, when the cable contracts, the piston pull rod moves inwards, and hydraulic oil enters the oil cavity from the second energy accumulator;
S5, if the cable is not continuously contracted, directly carrying out S6, if the cable is continuously contracted, and if no hydraulic oil exists in the second accumulator, the hydraulic oil in the oil cavity enters the oil tank;
S6, circularly carrying out the processes of S2-S5.
Further, the step S3 further includes:
and if the pressure in the second accumulator reaches the set maximum pressure, hydraulic oil enters the oil tank from the second accumulator.
The embodiment of the invention has the following technical effects:
The application can store energy generated by the motion of the berthing ship by arranging the first energy accumulator as a high-pressure energy accumulator, arranging the second energy accumulator as a low-pressure energy accumulator, arranging a one-way valve, an overflow valve and the like which are convenient for energy interaction between the hydraulic cylinder and the two energy accumulators, and can determine the maximum tension of the cable when the cable stretches by arranging the maximum pressure value in the first energy accumulator, and can better meet the actual requirement by arranging the maximum pressure value in the second energy accumulator to determine the maximum tension of the cable when the cable retracts;
The first energy accumulator can ensure that the tension keeps a stable small change when the cable is subjected to a large force, and the cable is also greatly stretched, so that the berthing of the ship is more stable;
The energy of the ship is used for energy supply, so that the energy loss of a hydraulic system during energy transmission and energy conversion is reduced, the overall energy efficiency is improved, more environment-friendly and sustainable energy utilization can be realized, the energy is not provided by the outside such as a hydraulic pump station, the maintenance requirement of the hydraulic pump station is reduced, the environmental pollution is reduced, and noise and vibration generated during the operation of the hydraulic pump station can not occur;
in addition, in some special environments (e.g., remote areas, polar areas) access to external energy sources may be difficult, and the present application may enhance the ability of the vessel to be moored in these environments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a self-energy storage device applied to mooring constant tension according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a one-way valve, a second-way valve or a third-way valve according to an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a pilot-operated overflow valve according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a direct-acting overflow valve according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a hydraulic cylinder according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a first accumulator or a second accumulator according to an embodiment of the present invention;
FIG. 7 is a schematic diagram showing the tension change of a cable according to an embodiment of the invention when the cable fluctuates with sea waves;
In the figure, an accumulator No. 101, an accumulator No. 102, a check valve No. 201, a check valve No. 202, a check valve No. 203, a check valve No. three, an overflow valve No. 301, an overflow valve No. 302, an overflow valve No. two, an oil cavity, a piston pull rod, an oil tank and a piston pull rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.
Example 1
The following is explained first:
Referring to fig. 5, a hydraulic cylinder is an actuator in a hydraulic system that converts hydraulic energy into mechanical energy, and includes a sealed oil chamber formed by a steel cylinder, a cylinder head, a piston rod that is displaced in the oil chamber, and a gas discharge device.
Referring to fig. 3, the pilot relief valve is composed of two parts, a main valve and a pilot valve. The main valve is a valve that is opened and closed by a medium pressure, and the pilot valve controls the opening and closing of the main valve by a pressure change in a pilot oil passage. The pilot oil route comprises two control ports and a pilot chamber, and the structure is relatively complex. When the pressure of the medium is lower than the set valve pressure, the valve is closed, the medium cannot flow through the valve, when the pressure of the medium reaches the set valve pressure, the pilot valve is opened first, the opening of the main valve is controlled through the pressure change in the pilot oil passage, and the medium can flow through. When the medium pressure decreases, the pressure in the pilot oil passage also decreases, and the main valve closes. The operating principle enables the pilot overflow valve to have the characteristics of quick response and stable performance.
Referring to fig. 4, the direct acting relief valve is mainly composed of a valve body and a valve core. The valve body is internally provided with an adjusting hole and an adjusting screw, the pressure of the pressure adjusting spring is changed through the adjusting screw, and then the displacement of the valve core is adjusted, and the flow is controlled. The overflow amount is controlled by adjusting the displacement of the valve core. When pressure oil enters the valve body, pressure acts on the valve core, when the pressure exceeds the force exerted by the adjusting screw, the valve core is opened, and oil flows out from the overflow hole, so that pressure adjustment is realized. When the pressure is reduced, a spring on the adjusting screw closes the valve element.
Referring to fig. 6, the energy accumulator is mainly used for converting energy in the system into compression energy or potential energy to be stored at proper time, and releasing the energy in the form of hydraulic pressure or air pressure when the system is needed to supplement the energy of the system.
Fig. 1 is a schematic illustration of a self-energy storage device for mooring constant tension according to an embodiment of the present application. Referring to fig. 1, the apparatus of the present application comprises:
the hydraulic device comprises a hydraulic cylinder, wherein a piston pull rod 5 of the hydraulic cylinder is connected with one end of a cable, the piston pull rod 5 correspondingly stretches or retracts along with tension change in the cable, and the piston pull rod 5 in the hydraulic cylinder has an automatic return function.
The energy storage module comprises a first energy storage device 101 and a second energy storage device 102, wherein the volume of the second energy storage device 102 is larger than that of the first energy storage device 101, the maximum pressure of the first energy storage device 101 is set to be larger than that of the second energy storage device 102, and the first energy storage device 101 can be regarded as a high-pressure energy storage device and the second energy storage device 102 can be regarded as a low-pressure energy storage device relatively.
The first energy accumulator 101 and the second energy accumulator 102 are respectively connected with the oil cavity 4 of the hydraulic cylinder through a hydraulic pipeline, the first energy accumulator 101 and the second energy accumulator 102 are connected through the hydraulic pipeline, and the hydraulic oil quantity in the hydraulic cylinder is adjusted through the first energy accumulator 101 and the second energy accumulator 102 to adjust the pressure in the hydraulic cylinder, so that the tension in the cable is kept within a preset value during working.
When the ship is moored, the period is shorter because the ship shakes to cause repeated stretching and shrinking of the cable, so that the capacity of the first accumulator 101 is smaller, the tension can reach the maximum rapidly when the cable stretches, and the energy is repeatedly transmitted to the second accumulator 102, and the capacity of the second accumulator 102 is larger, so that the capacity of smoothing pressure fluctuation is stronger, the tension of the cable can be slowly reduced, and the severe pressure floating in the oil cavity 4 is avoided.
In the present application, the tension is calculated by the following formula:
,
where P represents the pressure in the oil chamber and S represents the piston surface area of the piston rod. S is a constant value, and obviously, the tension is constant only by keeping P at a constant value.
Based on the principle, when the self-energy storage device works, referring to fig. 7, the cable stretches or retracts along with wave fluctuation, so that the piston pull rod 5 is driven to stretch and retract repeatedly, the maximum pressure of the first energy storage device 101 mainly receives hydraulic oil from the oil cavity 4 when the cable stretches, the pressure in the oil cavity 4 is reduced and is stabilized near the maximum pressure of the first energy storage device 101, so that the tension in the cable is maintained near a first preset value F 1, the maximum pressure of the second energy storage device 102 mainly works to output hydraulic oil when the cable contracts, the pressure in the oil cavity 4 is increased and is stabilized near the maximum pressure of the second energy storage device 102, so that the tension in the cable is maintained near a second preset value F 2, and the whole device can play a role in storing energy, so that the self-energy supply purpose is realized.
It should be noted that, the maximum pressures of the first accumulator 101 and the second accumulator 102 may be set according to actual needs, so that the maximum tension when the cable stretches is maintained near the tension corresponding to the pressure set by the first accumulator 101, i.e. near the first preset value F 1, and the maximum tension when the cable contracts is also maintained near the tension corresponding to the pressure set by the second accumulator 102, i.e. near the second preset value F 2.
While the piston rod 5 is contracted, i.e. the cable is not working, the tension gradually decreases from F 2 to 0. In addition, on the basis of fig. 7, the tension has stable small-amplitude change in the stretching or retracting process, and is limited by the structural limitations of an energy accumulator, a valve and the like, but the change range of the amplitude is smaller, so that the overall tension change trend is not influenced.
Example 2
Based on the apparatus in embodiment 1, there is provided a self-energy storage method applied to mooring constant tension, comprising the steps of:
S1, connecting the hydraulic cylinder with a cable, and installing the device on a ship;
s2, when the cable is stretched, the piston pull rod 5 moves outwards, and hydraulic oil enters the first accumulator 101 from the oil cavity 4;
And S3, if the cable is not stretched continuously, S4 is carried out, if the cable is stretched continuously, hydraulic oil enters the second accumulator 102 from the first accumulator 101 when the pressure in the first accumulator 101 reaches the set maximum pressure, the tension of the cable is a first preset value, and if the pressure in the second accumulator 102 reaches the set maximum pressure, the hydraulic oil enters the oil tank from the second accumulator 102.
S4, when the cable is contracted, the piston pull rod 5 moves inwards, and hydraulic oil enters the oil cavity 4 from the second accumulator 102;
S5, if the cable is not continuously contracted, directly performing S6, if the cable is continuously contracted, and if no hydraulic oil exists in the second accumulator 102, the hydraulic oil in the oil cavity 4 enters the oil tank 6;
S6, circularly carrying out the processes of S2-S5.
Example 3
Based on the content of embodiment 1, the energy storage module further includes:
A check valve 201 is provided between the accumulator 101 and the hydraulic cylinder for controlling whether or not the hydraulic oil in the oil chamber 4 is transferred to the accumulator 101, and when the pressure in the oil chamber 4 is greater than the pressure in the accumulator 101, the check valve 201 is turned on and acts, as shown in fig. 2.
The second check valve 202 is disposed between the second accumulator 102 and the hydraulic cylinder, and is used for controlling whether the hydraulic oil in the second accumulator 102 is transferred to the oil chamber 4, and when the pressure in the oil chamber 4 is smaller than the pressure in the second accumulator 102, the second check valve 202 is conducted and acts.
The first overflow valve 301 is arranged on a hydraulic pipeline between the first accumulator 101 and the second accumulator 102 and is used for controlling the maximum pressure P 1 in the first accumulator 101, the first overflow valve is selected to be a pilot overflow valve according to the action effect of the first overflow valve, the pressure of the pilot overflow valve is set through an adjusting nut, when the pressure of the pilot overflow valve received by one end of the first accumulator 101 is larger than the set pressure, the pilot overflow valve is conducted, and the first overflow valve can be set in a related mode according to actual requirements.
The second overflow valve 302 is connected with the second accumulator 102 through a hydraulic pipeline and is used for controlling the maximum pressure in the second accumulator 102, the second overflow valve can be a direct-acting overflow valve, the direct-acting overflow valve is more suitable for the condition of low pressure and small flow, the sensitivity is higher, and the second overflow valve can be arranged in a related manner according to actual requirements.
The oil tank 6 is connected with the second overflow valve 302 and is used for storing hydraulic oil from the second accumulator 102, and by arranging an external oil tank, the hydraulic oil is provided for the oil cavity 4, and the hydraulic oil is supplemented when the pressure of the second accumulator 102 and the pressure of the oil cavity 4 are unbalanced.
A third check valve 203 is provided on the hydraulic line between the tank 6 and the oil chamber 4, and the third check valve 203 is used to control whether or not to transfer the hydraulic oil in the tank 6 into the oil chamber 4.
And a third overflow valve is arranged on the hydraulic pipeline between the second accumulator 102 and the oil cavity 4 and is used for stabilizing the pressure at the outlet of the second accumulator 102, when the tension in the cable is smaller than a certain value, the third check valve 203 is opened, and the second check valve is closed, so that the energy storage effect of the second accumulator 102 is more obvious.
The application is provided with two energy accumulators which are connected with a hydraulic cylinder and store energy by a hydraulic principle. The two energy accumulators are provided with different volumes and different maximum pressures through the overflow valve, energy generated by ship movement is stored, and the tension in the mooring rope is kept in a constant state in the expansion process under the condition that no energy is provided outside.
Based on the arrangement of the device structure, the actual use process comprises the following steps:
(1) Connecting the hydraulic cylinder with a cable, and mounting the device on a ship;
(2) When the cable is stretched, the piston pull rod moves outwards, the oil pressure of the oil cavity side of the first check valve 201 is larger than that of the first accumulator side, the first check valve 201 is conducted, and hydraulic oil enters the first accumulator 101;
The hydraulic oil in the first accumulator 101 is increased to the set maximum pressure P 1, the cable is still continuously lengthened, the hydraulic oil is still continuously transmitted from the oil cavity 4 to the first accumulator 101, the first overflow valve 301 is conducted, the hydraulic oil in the first accumulator 101 enters the second accumulator 102, the total amount of the hydraulic oil in the first accumulator 101 is unchanged, and the tension in the cable is F 1.
The cable continues to stretch, and the maximum stretching is achieved until the hydraulic oil fills the second accumulator 102, so that the second accumulator 102 reaches the set maximum pressure P 2, the pressure in the second accumulator 102 exceeds the set maximum pressure, the second overflow valve 302 is conducted, the hydraulic oil enters the oil tank 6, the total amount of the hydraulic oil in the second accumulator 102 is unchanged, and the tension in the cable is still F 1.
(3) When the cable starts to shrink, the piston pull rod 5 automatically moves inwards, the oil pressure of the oil cavity side of the first check valve 201 is smaller than that of the first accumulator side, the first check valve 201 is closed, the oil pressure in the first accumulator 101 is constant near P 1, the first overflow valve 301 is closed, the second overflow valve 302 is closed, the oil pressure of the oil cavity side of the second check valve 202 is smaller than that of the second accumulator 102 side, the second check valve 202 is communicated, and hydraulic oil enters the oil cavity 4 from the second accumulator 102;
At this time, the tension is F 2, hydraulic oil in the oil tank 6 cannot enter the oil chamber 4, because the pressure in the second accumulator 102 is greater than the pressure in the oil tank 6, the tension is F 2, and the pressure in the oil tank 6 is air pressure. The amount of hydraulic oil in the oil tank 6 is larger than the amount of hydraulic oil required by the total retraction of the piston rod 5 in the oil cavity 4, and the basic oil level of the oil tank is also satisfied, which can be approximately 2-3 times the amount of hydraulic oil required by the total retraction of the piston rod 5.
The hydraulic pressure in the second accumulator 102 is reduced, the tension in the cable is gradually smaller than F 2 until the hydraulic pressure in the second accumulator 102 is smaller than or equal to the hydraulic pressure in the oil cavity 4, the second check valve 202 is closed, the hydraulic oil in the oil tank 6 can continue to enter the oil cavity at the moment to compensate the negative pressure generated in the oil cavity, or the cable is directly stretched to enter the next step (4).
When the third relief valve is provided, when the tension in the cable is smaller than a predetermined value, the second check valve 202 is closed, and the third check valve 203 is opened, and when the tension in the cable is larger than the predetermined value, the third relief valve and the second check valve 202 are opened, so that the hydraulic oil in the second accumulator 102 enters the oil chamber 4.
(4) When the cable is pulled again, the piston rod moves outwards, the oil pressure in the oil chamber 4 decreases,
The oil pressure of the oil cavity side of the first check valve 201 is larger than that of the first accumulator side, the first check valve 201 is conducted, hydraulic oil enters the first accumulator 101, the hydraulic pressure in the first accumulator 101 is close to F 1 at the moment, so that the first overflow valve 301 is conducted, hydraulic oil enters the second accumulator 102 from the first accumulator 101, when the hydraulic pressure in the second accumulator 102 is close to F 2, the second overflow valve 302 is conducted, hydraulic oil enters the oil tank 6, and the tension in a cable is F 1 at the moment.
(5) When the cable is contracted again, it enters (2).
Based on the technical scheme, the self-generated energy of ship motion is stored, so that the problems of additional energy consumption, cable tension and insufficient elongation required by constant tension of ship mooring are solved.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application. As used in this specification, the terms "a," "an," "the," and/or "the" are not intended to be limiting, but rather are to be construed as covering the singular and the plural, unless the context clearly dictates otherwise. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method or apparatus comprising such elements.
It should also be noted that the positional or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and the like should be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the technical solution of the embodiments of the present invention.
Claims (7)
Priority Applications (1)
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246983A (en) * | 1994-03-09 | 1995-09-26 | Mitsubishi Heavy Ind Ltd | Ship mooring device |
| US20050167988A1 (en) * | 2004-02-03 | 2005-08-04 | Charles Wood | Wave energy conversion system |
| CN110023185A (en) * | 2016-09-07 | 2019-07-16 | 海岸张力控股有限公司 | The fixed devices, systems, and methods of hydraulic mooring hawser |
| CN212202669U (en) * | 2020-04-14 | 2020-12-22 | 徐州工业职业技术学院 | Engineering machinery walking mechanism and crawler tensioning device integrated hydraulic control system |
| CN213279255U (en) * | 2020-06-11 | 2021-05-25 | 浙江大学 | Movable floating platform system based on clean energy |
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- 2024-11-19 CN CN202411649596.8A patent/CN119143041B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07246983A (en) * | 1994-03-09 | 1995-09-26 | Mitsubishi Heavy Ind Ltd | Ship mooring device |
| US20050167988A1 (en) * | 2004-02-03 | 2005-08-04 | Charles Wood | Wave energy conversion system |
| CN110023185A (en) * | 2016-09-07 | 2019-07-16 | 海岸张力控股有限公司 | The fixed devices, systems, and methods of hydraulic mooring hawser |
| CN212202669U (en) * | 2020-04-14 | 2020-12-22 | 徐州工业职业技术学院 | Engineering machinery walking mechanism and crawler tensioning device integrated hydraulic control system |
| CN213279255U (en) * | 2020-06-11 | 2021-05-25 | 浙江大学 | Movable floating platform system based on clean energy |
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| CN119143041B (en) | 2025-03-18 |
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