CN111907662A - Test platform for simulating large-load wave heave buffering compensation system - Google Patents
Test platform for simulating large-load wave heave buffering compensation system Download PDFInfo
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- CN111907662A CN111907662A CN202010708084.XA CN202010708084A CN111907662A CN 111907662 A CN111907662 A CN 111907662A CN 202010708084 A CN202010708084 A CN 202010708084A CN 111907662 A CN111907662 A CN 111907662A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
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Abstract
The invention relates to a buffer compensation system test platform for simulating heave of heavy-load waves, which comprises a counter-force frame, a lifting oil cylinder, steel strands, a first vibration excitation unit and a second vibration excitation unit, wherein the first vibration excitation unit comprises a balance beam, a sliding mechanism, a vibration excitation oil cylinder and a buffer mounting frame, the balance beam is connected with the counter-force frame in a sliding mode through the sliding mechanism, one end of the vibration excitation oil cylinder is connected with the balance beam, the other end of the vibration excitation oil cylinder is fixed with the counter-force frame, the buffer oil cylinder in the buffer compensation system is installed on the buffer mounting frames of the two vibration excitation units, the piston end of the buffer oil cylinder is connected with the balance beam, the lifting oil cylinder is connected with the balance beam of the first vibration excitation unit. Compared with the prior art, the invention can simulate the load change caused by sea waves, surges and the like, obtains the influence of the load change on the buffer compensation system, has simple structure and low cost, is easy to popularize and apply, and has higher practical value.
Description
Technical Field
The invention relates to the field of ocean engineering, in particular to a buffer compensation system test platform for simulating heave of heavy-load waves.
Background
With the rapid development of the modern society, the activities of human beings on the development and utilization of ocean resources are increasing day by day, and the number of ships with large tonnage and accidents are continuously increased. Rescue and salvage of large-tonnage sunken ships are of great significance to guarantee of strategic resources such as ports and navigation channels and environmental safety. The traditional sunken ship salvaging method comprises the following steps: the floating pontoon is lifted and floated and salvages, floats and hangs and salvages, seals cabin inflation and pumps water and salvage etc. but receive space, environment and sunken ship tonnage big etc. and the traditional method can't satisfy. In order to break through the technical bottleneck, a hydraulic synchronous lifting system suitable for salvaging a large-tonnage sunken ship is gradually applied, and the integral salvaging of the large-tonnage sunken ship is realized.
In the sunken ship salvage process, the marine environment is complicated changeable, and wave, unrestrained, gush etc. can cause to lift and float barge up and down to lead to salvage load unstable, rock the vibration in order to reduce, keep salvage load balanced, lifting means needs and the collocation of buffering compensating system to use. The performance of the buffer compensation system is extremely important for improving the safety of the system, and how to test and verify the reliability and performance parameters of the buffer compensation system is very important. At present, most of common wave heave compensation test beds are designed aiming at offshore equipment, such as drilling platforms, lifting towers and other offshore operation equipment, the structure is complex, the loading load is small, and the test bed is not suitable for testing heavy-load sunken ship salvaging equipment.
For example, patent CN 106768852a provides a heave compensation experiment device and system, which are mainly applied to heave compensation motion simulation and compensation device test of an offshore drilling platform drill string. The vertical motion simulation of the drill column can be realized to a certain extent, the bearing performance of the platform buffer device is tested through the force measuring device, and the motion displacement and the load change are compensated through the passive oil cylinder. However, the device disclosed in the patent has a small load, cannot simulate the change of waves through active excitation, and is difficult to meet the requirement of the sinking ship salvaging equipment on large load.
For example, patent CN107860662A provides an on-road system test method for a large deepwater active and passive combined compensation device, which utilizes a large dynamic load simulation device, a platform motion simulation device and a crown block simulation device to realize static and dynamic tests of the deepwater active and passive combined compensation device in a full system loading state. The hydraulic synchronous lifting device is complex in structure and large in size, and each part is relatively independent, so that the hydraulic synchronous lifting device and the buffer system are difficult to combine and test.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a test platform of a buffer compensation system for simulating the heave of heavy load waves, which is designed for a heave buffer compensation system of a hydraulic synchronous lifting device for salvaging a sunken ship, can be used for testing the static bearing performance of the lifting system after the heave compensation and the dynamic performance of resisting the influence of waves, and can be used for assisting in researching the effect of the buffer compensation system for reducing the wave load.
The purpose of the invention can be realized by the following technical scheme:
a test platform of a buffer compensation system for simulating heave of heavy-load waves comprises a counter-force frame, a lifting oil cylinder, a steel strand, a first excitation unit and a second excitation unit, wherein the lifting oil cylinder, the first excitation unit and the second excitation unit are sequentially and collinearly arranged in the counter-force frame;
the first excitation unit comprises a balance beam, a sliding mechanism, an excitation oil cylinder and a buffer mounting frame, the balance beam is connected with the counter-force frame in a sliding mode through the sliding mechanism, one end of the excitation oil cylinder is connected with the balance beam, the counter-force frame is fixed to the other end of the excitation oil cylinder, and the buffer mounting frame is fixedly mounted on the counter-force frame; the structure of the second excitation unit is the same as that of the first excitation unit; the buffer oil cylinders in the buffer compensation system are arranged on the buffer mounting frames of the two vibration excitation units, the piston ends of the buffer oil cylinders are connected with the balance beam, the buffer oil cylinders in the first vibration excitation unit and the second vibration excitation unit are arranged in a back-to-back mode, and the extending directions of the piston ends are opposite;
one end of the lifting oil cylinder is fixedly arranged, the other end of the lifting oil cylinder is connected with the balance beam of the first vibration excitation unit, one end of the steel strand is connected with the lifting oil cylinder, and the other end of the steel strand penetrates through the first vibration excitation unit and then is connected with the balance beam of the second vibration excitation unit.
Furthermore, in the first excitation unit and the second excitation unit, the excitation oil cylinder is detachably and movably connected with the balance beam.
Furthermore, the excitation mechanism is connected with the balance beam through a pin shaft.
Furthermore, two buffer oil cylinders which are symmetrically arranged are respectively arranged in the first vibration excitation unit and the second vibration excitation unit.
Furthermore, the buffer compensation system further comprises an energy accumulator and a hydraulic valve group, the energy accumulator is connected with the buffer oil cylinder through a hydraulic pipeline, and the hydraulic valve group is arranged in the hydraulic pipeline.
Furthermore, each buffer oil cylinder is provided with a corresponding hydraulic valve group and a plurality of energy accumulators.
Further, the energy accumulator is a capsule type energy accumulator.
Furthermore, the reaction frame is a cubic frame and is fixed on the working table.
Further, the sliding mechanism is of a track structure.
Furthermore, the first excitation unit comprises two excitation oil cylinders which are symmetrically arranged on two sides of the reaction frame.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arrangement of the counter-force frame, the lifting oil cylinder, the steel strand, the first excitation unit and the second excitation unit, the load change caused by sea waves, surges and the like can be simulated, the influence of the load change on the buffer compensation system can be obtained, and the defect that the existing related test equipment is lacked is overcome; meanwhile, the invention has simple structure, low cost, easy popularization and application and higher practical value.
2. The invention realizes static test and dynamic test by the detachable movable connection of the excitation mechanism and the balance beam. The static test can test the bearing capacity, the maximum compensation displacement and other static performances of the buffer compensation system by loading the lifting oil cylinder; in the dynamic test, the vibration exciting oil cylinder drives the lifting oil cylinder to move left and right to simulate the displacement and load change caused by waves, and the response speed of the buffering compensation system and the wave load reduction condition are tested through data such as oil pressure displacement, so that accurate and complete test is realized.
Drawings
Fig. 1 is a schematic structural view of a use state of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a front view of the present invention.
Fig. 4 is a schematic sectional view of the balance beam and the slide mechanism.
Fig. 5a and 5b are schematic diagrams of static testing of the buffer compensation system.
FIG. 6 is a schematic diagram of a dynamic test of the cushioning compensation system.
Reference numerals: the device comprises a reaction frame 1, a lifting oil cylinder 2, a balance beam 3, an excitation oil cylinder 4, a buffer mounting frame 5, a bottom anchor 6, a steel strand 7, a fixed slide rail 8, a sliding mechanism 9, a pin shaft 10, an energy accumulator 11, a buffer oil cylinder 12, a hydraulic valve bank 13, a first excitation unit A, a second excitation unit B and a first vibration unit.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 to 4, the present embodiment provides a test platform of a buffer compensation system for simulating heave of heavy load, including a counterforce frame 1, a lift cylinder 2, a steel strand 7, a first excitation unit a, and a second excitation unit B. The reaction frame 1 is a cubic frame, and the lifting oil cylinder 2, the steel strand 7, the first excitation unit A and the second excitation unit B are arranged in the reaction frame 1 in a collinear manner from left to right in sequence. The counterforce frame 1 is fixed on a working table, which is the ground in this embodiment.
The two excitation units of the first excitation unit A and the second excitation unit B have the same structure. The first excitation unit A comprises a balance beam 3, a sliding mechanism 9, an excitation oil cylinder 4 and a buffer mounting frame 5. The balance beam 3 is slidably connected to the reaction frame 1 via a sliding mechanism 9. The sliding mechanism 9 may be a roller rail, a sliding rail, or the like. In this embodiment, the sliding mechanism 9 is a fixed slide rail 8 disposed on the reaction frame 1 and a sliding block fixedly connected to the cross section of the balance beam 3 and surrounding the cross section, and the sliding block and the fixed slide rail 8 form a sliding fit. The first excitation unit a may include a plurality of excitation cylinders 4, preferably two excitation cylinders, which are symmetrically disposed on both sides of the reaction frame 1. One end of the excitation oil cylinder 4 is fixedly arranged on the counter-force frame 1, and the other end is detachably and movably connected with the left end and the right end of the balance beam 3. The detachable structure can adopt the existing connection modes such as a buckle, a bolt and the like. In this embodiment, the pin 10 is used for connection. The buffer mount 5 is fixedly mounted on the reaction frame 1.
The cushioning compensation system to be tested generally comprises a cushioning cylinder 12, an accumulator 11 and a hydraulic valve pack 13. In this embodiment, two buffer cylinders 12 are installed in each vibration excitation unit, and the two buffer cylinders are arranged symmetrically left and right. The buffer oil cylinder 12 is arranged on the buffer mounting frame 5, and the piston end of the buffer oil cylinder 12 is connected with the balance beam 3. The piston ends of the buffer cylinders 12 in the first excitation unit a and the second excitation unit B extend in opposite directions and are arranged opposite to each other. Each buffer oil cylinder 12 is provided with a corresponding hydraulic valve group 13 and a plurality of energy accumulators 11, the energy accumulators 11 are connected with the buffer oil cylinders 12 through hydraulic pipelines, and the hydraulic valve groups 13 are arranged in the hydraulic pipelines. The accumulator 11 in the present embodiment is a capsule accumulator 11.
One end of the lifting oil cylinder 2 is fixedly connected with the ground through a support, and the other end of the lifting oil cylinder is connected with the balance beam 3 of the first excitation unit A. One end of each of the parallel steel strands 7 is connected with the lifting oil cylinder 2 through a bottom anchor 6, and the other end of each of the parallel steel strands passes through the first vibration excitation unit A and then is connected with the balance beam 3 of the second vibration excitation unit B through the bottom anchor 6.
In this embodiment, the counterforce frame 1 mainly provides fixing and supporting functions; the buffer mounting frame 5 plays a role in fixing the cylinder barrel of the buffer oil cylinder 12; the lifting oil cylinder 2 provides lifting force; the balance beam 3 plays a supporting role and slides left and right along with the actions of the shock excitation oil cylinder 4 and the buffer oil cylinder 12, and the shock excitation oil cylinder 4 drives the lifting oil cylinder 2 to move left and right to simulate wave changes during dynamic testing. The wave heave damping compensation system can be statically and dynamically tested through the embodiment so as to check and test the performance of the damping compensation system and observe the wave load reduction effect.
In addition, in the present embodiment, the rated load of the lift cylinder 2 is set to 450 t; the rated load of the buffer oil cylinder 12 of the buffer compensation system is 200t, the maximum stroke is 1100mm, two buffer oil cylinders 12 form a group, and four buffer oil cylinders 12 are tested in two directions. The energy accumulator 11 adopts a single 100L energy accumulator 11, and 400L volume, 600L volume and 800L volume energy accumulators 11 are respectively configured according to the lifting force for testing.
The working principle of the embodiment is as follows:
1. during static test, the pin shaft 10 of the excitation oil cylinder 4 is removed, so that the excitation oil cylinder 4 does not limit the buffer oil cylinder 12 any more. The energy accumulator 11 sets an initial pressure and a working pressure, the buffer oil cylinder 12 is filled with liquid, so that the interaction force of the lifting oil cylinder 2 and the buffer oil cylinder 12 on the balance beam 3 is relatively balanced, and the bearing capacity, the compensation displacement and other static performances can be obtained by observing and recording the stroke and oil pressure data of the buffer oil cylinder 12.
2. During dynamic testing, the energy accumulator 11 sets initial pressure and working pressure, locks the steel strand 7, and drives the lifting oil cylinder 2 to move left and right by using the excitation oil cylinder 4 to simulate a heave motion state caused by sea waves. When the balance beam 3 moves leftwards, the right buffer oil cylinder 12 is pressurized and increased, oil is charged into the energy accumulator 11 through the hydraulic valve group 13, air in the energy accumulator 11 is compressed, and therefore the buffer effect is achieved, and meanwhile the piston rod of the right buffer oil cylinder 12 retracts to compensate movement displacement; the pressure of the right buffer oil cylinder 12 is lowered, oil in the energy accumulator 11 is rapidly filled into the buffer oil cylinder 12, air energy in the energy accumulator 11 is released, and meanwhile, a piston rod of the right buffer oil cylinder 12 extends out to compensate motion displacement. The same principle applies when the balance beam 3 moves to the right. And dynamic performances such as response speed, load reduction and the like of the buffer compensation system are obtained by observing the motion state and oil pressure data of the buffer compensation system.
The experimental procedure for this example is as follows:
the static test is shown in fig. 5a and 5 b.
Fig. 5a shows a test state of the cushion cylinder 12 in the second excitation unit B: a. setting the initial charging pressure and the working pressure of the accumulator 11; b. removing the connecting pin shaft 10 of the excitation oil cylinder 4 in the second excitation unit B; c. filling liquid into a buffer oil cylinder 12 in the second excitation unit B, and pushing the balance beam 3 to move rightwards by the buffer oil cylinder 12; d. the lifting oil cylinder 2 slowly lifts the cylinder to drive the balance beam 3 to move leftwards; e. and after the system is integrally stable, recording the stroke and oil pressure data of the buffer oil cylinder 12 to obtain the bearing capacity, compensation displacement and other static performances of the second excitation unit B.
Fig. 5b shows a test state of the cushion cylinder 12 in the first excitation unit a: a. setting the initial charging pressure and the working pressure of the accumulator 11; b. removing the connecting pin shaft 10 of the excitation oil cylinder 4 in the first excitation unit A; c. filling liquid into a buffer oil cylinder 12 in the first excitation unit A, pushing the balance beam 3 to move leftwards by the buffer oil cylinder 12, slowly lifting a cylinder by a lifting oil cylinder 2 to tension the steel strand 7, and driving the balance beam 3 to move rightwards by the steel strand 7; e. and after the system is integrally stable, recording the stroke and oil pressure data of the buffer oil cylinder 12 to obtain the bearing capacity, compensation displacement and other static performances of the first excitation unit A.
The dynamic test is shown in fig. 6.
a. Setting the initial charging pressure and the working pressure of the accumulator 11; b. locking the position of the lifting oil cylinder 2 and the length of the steel strand 7; c. the excitation oil cylinder 4 is utilized to drive the lifting oil cylinder 2 and the balance beam 3 to move left and right; d. when the balance beam 3 moves rightwards, the buffer oil cylinder 12 of the first vibration excitation unit A is pressurized and increased, oil is filled into the energy accumulator 11 through the hydraulic valve group 13, air in the energy accumulator 11 is compressed, and therefore the buffer effect is achieved, and meanwhile the piston rod of the buffer oil cylinder 12 of the first vibration excitation unit A retracts to compensate movement displacement; the pressure of the buffer oil cylinder 12 of the second vibration excitation unit B is lowered, oil liquid in the energy accumulator 11 is rapidly filled into the buffer oil cylinder 12, air energy in the energy accumulator 11 is released, and meanwhile, a piston rod of the buffer oil cylinder 12 of the second vibration excitation unit B extends out to compensate motion displacement; when the balance beam 3 moves leftwards, the buffer oil cylinder 12 of the second vibration excitation unit B is pressurized and increased, oil is filled into the energy accumulator 11 through the hydraulic valve group 13, air in the energy accumulator 11 is compressed, and therefore the buffer effect is achieved, and meanwhile the piston rod of the buffer oil cylinder 12 of the second vibration excitation unit B retracts to compensate movement displacement; the pressure of the buffer oil cylinder 12 of the first vibration excitation unit A is lowered, oil liquid in the energy accumulator 11 is rapidly filled into the buffer oil cylinder 12, air energy in the energy accumulator 11 is released, and meanwhile, a piston rod of the buffer oil cylinder 12 of the first vibration excitation unit A extends out to compensate motion displacement; f. by observing the motion state and oil pressure data of the first excitation unit A and the second excitation unit A, the dynamic performances of response speed, load reduction and the like can be obtained.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A buffer compensation system test platform for simulating heave of heavy-load waves is characterized by comprising a counter-force frame (1), a lifting oil cylinder (2), a steel strand (7), a first excitation unit and a second excitation unit, wherein the lifting oil cylinder (2), the first excitation unit and the second excitation unit are sequentially and collinearly arranged in the counter-force frame (1);
the first excitation unit comprises a balance beam (3), a sliding mechanism (9), an excitation oil cylinder (4) and a buffer mounting frame (5), the balance beam (3) is connected with the counter-force frame (1) in a sliding mode through the sliding mechanism (9), one end of the excitation oil cylinder (4) is connected with the balance beam (3), the counter-force frame (1) is fixed to the other end of the excitation oil cylinder, and the buffer mounting frame (5) is fixedly mounted on the counter-force frame (1); the structure of the second excitation unit is the same as that of the first excitation unit; a buffer oil cylinder (12) in the buffer compensation system is arranged on the buffer mounting frames (5) of the two vibration excitation units, the piston end of the buffer oil cylinder (12) is connected with the balance beam (3), the buffer oil cylinders (12) in the first vibration excitation unit and the second vibration excitation unit are arranged in a back-to-back manner, and the extending directions of the piston ends are opposite;
lifting cylinder (2) one end fixed set up, compensating beam (3) of first excitation unit are connected to the other end, steel strand wires (7) one end connect lifting cylinder (2), the other end passes and connects compensating beam (3) of second excitation unit behind the first excitation unit.
2. The test platform for the buffer compensation system for simulating the heave of the heavy load wave according to claim 1, wherein in the first excitation unit and the second excitation unit, the excitation oil cylinder (4) is detachably and movably connected with the balance beam (3).
3. The test platform for the buffer compensation system simulating the heave of a heavy load according to claim 2, wherein the excitation mechanism is connected with the balance beam (3) through a pin shaft (10).
4. The test platform for the buffer compensation system for simulating the heave of a heavy load wave according to claim 1, wherein two symmetrically arranged buffer oil cylinders (12) are respectively installed in the first vibration excitation unit and the second vibration excitation unit.
5. The test platform for the buffer compensation system simulating the heave of a heavy load according to claim 1, wherein the buffer compensation system further comprises an energy accumulator (11) and a hydraulic valve bank (13), the energy accumulator (11) is connected with the buffer cylinder (12) through a hydraulic pipeline, and the hydraulic valve bank (13) is arranged in the hydraulic pipeline.
6. The test platform for the damping compensation system simulating the heave of a heavy load according to claim 5, characterized in that each damping cylinder (12) is provided with a corresponding one hydraulic valve group (13) and a plurality of accumulators (11).
7. The test platform for the buffer compensation system simulating the heave of a heavy load according to claim 5, characterized in that the energy accumulator (11) is a capsule type energy accumulator.
8. The test platform for simulating a large-load wave-heave damping compensation system according to claim 1, characterized in that the counterforce frame (1) is a cubic frame, and the counterforce frame (1) is fixed on a working table.
9. The test platform for simulating a large-load heave damping and compensating system as claimed in claim 1, wherein the sliding mechanism (9) is of a rail structure.
10. The test platform for the buffer compensation system for simulating the heave of the heavy load wave as claimed in claim 1, wherein the first excitation unit comprises two excitation cylinders (4) which are symmetrically arranged on two sides of the counter force frame (1).
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| CN202010708084.XA CN111907662B (en) | 2020-07-22 | 2020-07-22 | Test platform for simulating large-load wave heave buffering compensation system |
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| CN202010708084.XA CN111907662B (en) | 2020-07-22 | 2020-07-22 | Test platform for simulating large-load wave heave buffering compensation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115071912B (en) * | 2022-06-13 | 2023-06-30 | 交通运输部上海打捞局 | Synchronous lifting process of special moon pool buoyancy tank |
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