CN110186648B - Wave load self-propelled ship model test protection device and use method thereof - Google Patents
Wave load self-propelled ship model test protection device and use method thereof Download PDFInfo
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- CN110186648B CN110186648B CN201910529464.4A CN201910529464A CN110186648B CN 110186648 B CN110186648 B CN 110186648B CN 201910529464 A CN201910529464 A CN 201910529464A CN 110186648 B CN110186648 B CN 110186648B
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Abstract
The invention relates to a wave load self-propelled ship model test protection device and a using method thereof, wherein the wave load self-propelled ship model test protection device comprises a hydraulic rod, a pulley block is arranged at one end of the hydraulic rod, and a force sensor is fixed at the other end of the hydraulic rod; one end of the traction rope is fixedly connected to the trailer, and the other end of the traction rope penetrates through the pulley block and is connected to the self-propelled ship model; two pulleys are embedded in the hydraulic rod groove in parallel to form a seamless pulley block; the protection device is additionally arranged at the front part and the rear part of a self-propelled ship model and a trailer workshop, when the trailer starts or stops in a deceleration mode, the traction rope bears load force due to inertial motion of the self-propelled ship model, the load is applied to the hydraulic rod through the pulley block, the force sensor detects the load value and sends the load value to the control computer, when the load reaches a set value, the hydraulic system starts, the self-propelled ship model is tensioned through tightening the traction rope, and the self-propelled ship model gradually moves or stops along with the trailer. The self-propelled ship model motion inertia force buffering device is simple and compact in structure, effectively buffers the motion inertia force of the self-propelled ship model, and greatly guarantees the safety of ships, equipment and personnel in the test.
Description
Technical Field
The invention relates to the technical field of self-propelled ship model test application, in particular to a wave load self-propelled ship model test protection device and a using method thereof.
Background
When a ship carries out a wave load model test in a wave-resistant pool, corresponding power needs to be provided through the outside in a self-navigation mode so as to correspondingly measure the wave load and the six-degree-of-freedom motion attitude of a ship model.
In the prior art, a trailer provides power required by a self-propelled ship model in a test, a traction rope is hung on the trailer, the ship model is pulled through the traction rope to realize the power provided for the ship model during starting and parking, and the posture of the ship model during starting and parking is controlled by manpower.
When ship model weight is great, can be because of the effect of inertial force bumps when its starts and stops, and lead to the ship model shell to break into water to damage instrumentation etc. if the haulage rope disconnection still very easily leads to personnel to be injured, has very big safety risk.
Disclosure of Invention
The applicant provides a wave load self-propelled ship model test protection device with a reasonable structure and a using method thereof aiming at the defects in the prior art, so that the action of inertia force when the self-propelled ship model starts and stops is effectively buffered, the damage of the device or the breakage of a traction rope is avoided, and the safety of ships, equipment and personnel in the test is greatly improved and ensured.
The technical scheme adopted by the invention is as follows:
a wave load self-propelled ship model test protection device comprises a hydraulic rod, wherein one end of the hydraulic rod is provided with a pulley block, the other end of the hydraulic rod is fixedly connected with a force sensor, and the hydraulic rod is connected with a hydraulic system; the self-propelled ship model is characterized by also comprising a traction rope, wherein one end of the traction rope is fixedly connected to the trailer, and the other end of the traction rope penetrates through the pulley block and is connected to the self-propelled ship model; at the beginning of the test, the trailer moves and pulls the haulage rope, and then exerts load in the hydraulic stem through the assembly pulley, and when force sensor detected load value on the hydraulic stem and reached the setting value, hydraulic system started, and it is taut with the haulage rope through the hydraulic stem to taut self-propelled ship model makes self-propelled ship model move along with the trailer.
As a further improvement of the above technical solution:
the hydraulic rod is connected to a horizontal longitudinal beam of the trailer through two supports, the two supports are respectively installed on the horizontal longitudinal beam through a first sleeve and form a tripod structure, and the joint of the two supports is fixedly installed on the hydraulic rod through a second sleeve.
The hydraulic rod has the structure that: the hydraulic cylinder comprises an outer cylinder, wherein a piston rod is arranged in the outer cylinder, one end of the piston rod extends out of the outer cylinder and is provided with a pulley block, hydraulic oil is arranged in the outer cylinder at the other end of the piston rod, and the hydraulic oil is connected to a hydraulic system through an oil pipe.
The end of the hydraulic rod is provided with a first flange plate, and the first flange plate is connected with one end of the force sensor through a bolt; and the other end of the force sensor is provided with a second flange plate, the second flange plate is fixedly provided with a base through bolts, and the base is fixedly arranged on the trailer.
The base is formed by fixedly connecting two vertical mounting blocks, the end heads of the two mounting blocks are respectively provided with a flange plate three and a flange plate four, and the flange plate three and the flange plate four are respectively connected with the trailer through bolts.
The end of the hydraulic rod is provided with a groove, the pulley block is a seamless pulley block formed by two pulleys, the two pulleys are embedded in the groove of the hydraulic rod in parallel, and the central shaft of each pulley is vertical to the length direction of the hydraulic rod.
And the force sensor and the hydraulic system are connected to a control computer through signal lines.
A use method of a wave load self-propelled ship model test protection device comprises the following operation steps:
the first step is as follows: preparing a device, namely placing a self-propelled ship model on the water surface, arranging a trailer and a track above the self-propelled ship model, wherein the trailer moves along the track through rollers; the support is arranged on a horizontal longitudinal beam of the trailer through a sleeve I, and the base is fixedly connected to the trailer through a bolt and provides support for the hydraulic rod; one end of a traction rope is fixedly connected to a horizontal longitudinal beam of the trailer, and the other end of the traction rope is fixedly connected to the self-propelled ship model;
the second step is that: the line connection, the force sensor and the hydraulic system are connected to the control computer through signal lines; setting a signal threshold value for starting the hydraulic system through a control computer;
the third step: when the operation starts, the trailer is started and pulls the traction rope, the traction rope applies load to the hydraulic rod through the pulley block, the load is gradually increased along with the movement of the trailer, and the force sensor detects the load value applied to the hydraulic rod and transmits the load value to the control computer;
the fourth step: the hydraulic system is started, when the load value received by the control computer reaches a set signal threshold value, the control computer sends a control signal to start the hydraulic system, the traction rope is tightened through the hydraulic rod, and then the traction rope tensions the self-propelled ship model, so that the stopped self-propelled ship model moves along with the trailer, and the damage of the inertial load to the self-propelled ship model is reduced;
the fifth step: the hydraulic system stops, when the speed of the self-propelled ship model is increased to be consistent with that of the trailer, the load applied to the hydraulic rod by the traction rope is gradually reduced, and when the load value received by the control computer is lower than a set signal threshold value, the control computer sends out a control signal to enable the hydraulic system to stop working; at the moment, the test of the self-propelled ship model formally starts;
and a sixth step: the hydraulic system is started, after the test is finished, the trailer performs deceleration movement, the traction rope is subjected to the load action of the inertial movement of the self-propelled ship model, the load is gradually increased, when the load value received by the control computer reaches a set signal threshold value, the control computer sends out a control signal to start the hydraulic system, the traction rope is tightened through the hydraulic rod, and the self-propelled ship model gradually decelerates;
the seventh step: and the hydraulic system is closed, when the self-propelled ship model and the trailer are decelerated to stop, the load force borne by the traction rope is reduced, and when the load value received by the control computer is lower than a set signal threshold value, a control signal is sent out to close the hydraulic system.
The invention has the following beneficial effects:
the self-propelled ship model test device is compact and reasonable in structure and convenient to operate, and by additionally arranging the protection device between the self-propelled ship model and the trailer, the action of inertia force of the self-propelled ship model during starting and stopping is effectively buffered, so that the safety of ships, equipment and personnel in a test is greatly improved and guaranteed; the haulage rope passes through the assembly pulley of hydraulic stem tip to effectively acquire the load situation that the haulage rope bore through force sensor in real time, the control computer is through comparison load value and settlement signal threshold value, and the opening and the closure of hydraulic system are in time controlled to tighten up the haulage rope, realize the purpose of buffering self-propelled ship model inertia force, and the device can not influence the test result to self-propelled ship model wave load and motion situation in the testing process.
The invention also comprises the following advantages:
the hydraulic stem passes through the tripod structure and is connected with the trailer, and the tripod structure makes the connection between device and the trailer more stable, reliable.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view of section a-a in fig. 1.
Fig. 3 is a sectional view of section B-B in fig. 1.
Fig. 4 is a cross-sectional view of section C-C of fig. 1.
FIG. 5 is a schematic view of the present invention in use.
Fig. 6 is a partially enlarged view of a portion D in fig. 5.
Wherein: 1. a horizontal stringer; 2. a pulley block; 3. a hauling rope; 4. a support; 5. a first sleeve; 6. hydraulic oil; 7. a first flange plate; 8. a force sensor; 9. a second flange plate; 10. a base; 11. a hydraulic system; 12. an oil pipe; 13. a signal line; 14. a second sleeve; 15. an outer cylinder; 16. a piston rod; 17. a third flange plate; 18. a flange plate IV; 19. a hydraulic lever; 21. a track; 22. a trailer; 23. a roller; 24. a control computer; 25. a horizontal cross beam; 26. self-propelled ship model; 27. the surface of the water.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the wave load self-propelled ship model test protection device of the embodiment includes a hydraulic rod 19, one end of the hydraulic rod 19 is provided with a pulley block 2, the other end of the hydraulic rod 19 is fixedly connected with a force sensor 8, and the hydraulic rod 19 is connected with a hydraulic system 11; the self-propelled ship model is characterized by further comprising a traction rope 3, wherein one end of the traction rope 3 is fixedly connected to the trailer 22, and the other end of the traction rope 3 penetrates through the pulley block 2 and is connected to the self-propelled ship model 26; at the beginning of the test, the trailer 22 moves and pulls the haulage rope 3, and then exerts load on the hydraulic stem 19 through the pulley block 2, and when the force sensor 8 detects that the load value reaches the setting value on the hydraulic stem 19, the hydraulic system 11 starts, and the haulage rope 3 is taut through the hydraulic stem 19 to taut self-propelled ship model 26 makes self-propelled ship model 26 move along with the trailer 22.
As shown in fig. 2, the hydraulic rod 19 is connected to the horizontal longitudinal beam 1 of the trailer 22 through two brackets 4, the two brackets 4 are respectively mounted on the horizontal longitudinal beam 1 through a first sleeve 5 and form a tripod structure, the joint of the two brackets 4 is fixedly mounted on the outer cylinder 15 of the hydraulic rod 19 through a second sleeve 14, and the tripod structure enables the connection between the hydraulic rod 19 and the trailer 22 to be more reliable and stable.
As shown in fig. 3, the hydraulic lever 19 has a structure of: the hydraulic system comprises an outer cylinder 15, a piston rod 16 is installed in the outer cylinder 15, one end of the piston rod 16 extends out of the outer cylinder 15 and is provided with a pulley block 2, hydraulic oil 6 is installed in the outer cylinder 15 located at the other end of the piston rod 16, and the hydraulic oil 6 is connected to a hydraulic system 11 through an oil pipe 12.
The end of the hydraulic rod 19 is provided with a first flange 7, and the first flange 7 is connected with one end of the force sensor 8 through a bolt; the other end of the force sensor 8 is provided with a second flange 9, the second flange 9 is fixedly provided with a base 10 through bolts, and the base 10 is fixedly arranged on a trailer 22.
As shown in fig. 4, the base 10 is formed by fixedly connecting two vertical mounting blocks, the ends of the two mounting blocks are respectively provided with a flange three 17 and a flange four 18, and the flange three 17 and the flange four 18 are respectively connected with the trailer 22 through bolts.
The end of the hydraulic rod 19 is provided with a groove, the pulley block 2 is a seamless pulley block formed by two pulleys, the two pulleys are embedded in the groove of the hydraulic rod 19 in parallel, and the central axis of the pulley is vertical to the length direction of the hydraulic rod 19.
The force sensor 8 and the hydraulic system 11 are both connected to a control computer 24 via signal lines 13.
The use method of the wave load self-propelled ship model test protection device comprises the following operation steps:
the first step is as follows: preparing the device, placing a self-propelled ship model 26 on a water surface 27, arranging a trailer 22 and a track 21 above the self-propelled ship model 26, and moving the trailer 22 along the track 21 through a roller 23; a horizontal cross beam 25 and a horizontal longitudinal beam 1 are arranged at the bottom of the trailer 22 in a circle, the horizontal cross beam 25 is parallel to the rail 21, and the horizontal longitudinal beam 1 is vertical to the horizontal cross beam 25;
the front part and the rear part of the self-propelled ship model 26 are connected with the trailer 22 by installing the protection device;
the bracket 4 is arranged on a horizontal longitudinal beam 1 of a trailer 22 through a sleeve I5, and the base 10 is fixedly connected to the trailer 22 through bolts and provides support for the hydraulic rod 19; one ends of the hauling ropes 3 of the two protection devices are respectively and fixedly connected to the horizontal longitudinal beams 1 at the front part and the rear part of the trailer 22, and the other ends of the hauling ropes 3 are respectively and fixedly connected to the bow and the stern of the self-propelled ship model 26; as shown in fig. 5 and 6;
the second step is that: the line connection, the force sensor 8 and the hydraulic system 11 are connected to a control computer 24 through a signal line 13; and a signal threshold value for starting the hydraulic system 11 is set through the control computer 24;
the third step: when the operation is started, the trailer 22 starts and pulls the traction rope 3 of the front protection device, the traction rope 3 applies load to the hydraulic rod 19 through the pulley block 2, the load is gradually increased along with the movement of the trailer 22, and the force sensor 8 detects the load value applied to the hydraulic rod 19 and transmits the load value to the control computer 24;
the fourth step: the hydraulic system is started, when the load value received by the control computer 24 reaches a set signal threshold value, the control computer 24 sends a control signal to start the hydraulic system 11 of the front protection device, the traction rope 3 is tightened through the hydraulic rod 19, and then the traction rope 3 tensions the self-propelled ship model 26, so that the stopped self-propelled ship model 26 starts to move along with the trailer 22 under the tension of the front traction rope 3, and the damage of the inertial load to the self-propelled ship model 26 is reduced;
the fifth step: the hydraulic system stops, when the speed of the self-propelled ship model 26 is increased to be consistent with that of the trailer 22, the load applied to the hydraulic rod 19 by the traction rope 3 is gradually reduced, and when the load value received by the control computer 24 is lower than a set signal threshold value, the control computer 24 sends out a control signal to enable the hydraulic system 11 to stop working; at this time, the test of the self-propelled ship model 26 formally starts;
and a sixth step: the hydraulic system is started, after the test is finished, the trailer 22 performs deceleration movement, the traction rope 3 of the rear protection device is subjected to the load action of the inertial movement of the self-propelled ship model 26, the load is gradually increased, when the load value received by the control computer 24 reaches a set signal threshold value, the control computer 24 sends a control signal to start the hydraulic system 11 of the rear protection device, the traction rope 3 of the rear protection device is tightened through the hydraulic rod 19, and the self-propelled ship model 26 gradually decelerates;
the seventh step: when the hydraulic system is closed and the self-propelled ship model 26 and the trailer 22 are decelerated to stop, the load force applied to the traction rope 3 of the rear protection device is reduced, and when the load value received by the control computer 24 is lower than a set signal threshold value, a control signal is sent out to close the hydraulic system 11.
This protection device is increased at anterior and rear portion between self-propelled ship model 26 and trailer 22, and the inertial force effect of anterior protection device effect buffering self-propelled ship model 26 when experimental initial trailer 22 starts, and the inertial force effect of buffering self-propelled ship model 26 is played to the protection device at rear portion when experimental trailer 22 slows down and stops, has effectively avoided the device damage or the tow rope 3 fracture risk that leads to because of the inertial force effect of self-propelled ship model 26.
The self-propelled ship model inertia force buffering device is simple and compact in structure and convenient to use, effectively buffers the inertia force of the self-propelled ship model, and greatly improves and guarantees the safety of ships, equipment and personnel in the test.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (4)
1. The utility model provides a wave load self-propelled ship model test protection device which characterized in that: the hydraulic system comprises a hydraulic rod (19), wherein a pulley block (2) is installed at one end of the hydraulic rod (19), a force sensor (8) is fixedly connected to the other end of the hydraulic rod (19), and the hydraulic rod (19) is connected with a hydraulic system (11); the self-propelled ship model is characterized by further comprising a traction rope (3), wherein one end of the traction rope (3) is fixedly connected to the trailer (22), and the other end of the traction rope (3) penetrates through the pulley block (2) and is connected to the self-propelled ship model (26); at the beginning of a test, a trailer (22) moves and pulls a traction rope (3), load is applied to a hydraulic rod (19) through a pulley block (2), when a force sensor (8) detects that the load value on the hydraulic rod (19) reaches a set value, a hydraulic system (11) is started, the traction rope (3) is tensioned through the hydraulic rod (19), and therefore a self-propelled ship model (26) is tensioned, and the self-propelled ship model (26) moves along with the trailer (22);
the hydraulic rod (19) is connected to a horizontal longitudinal beam (1) of a trailer (22) through two brackets (4), the two brackets (4) are respectively installed on the horizontal longitudinal beam (1) through a sleeve I (5) and form a tripod structure, and the joint of the two brackets (4) is fixedly installed on the hydraulic rod (19) through a sleeve II (14);
the end of the hydraulic rod (19) is provided with a first flange plate (7), and the first flange plate (7) is connected with one end of the force sensor (8) through a bolt; a second flange (9) is arranged at the other end of the force sensor (8), a base (10) is fixedly installed on the second flange (9) through bolts, and the base (10) is fixedly installed on a trailer (22);
the use method of the wave load self-propelled ship model test protection device comprises the following operation steps:
the first step is as follows: preparing a device, placing a self-propelled ship model (26) on a water surface (27), arranging a trailer (22) and a track (21) above the self-propelled ship model (26), and moving the trailer (22) along the track (21) through a roller (23); the support (4) is arranged on a horizontal longitudinal beam (1) of a trailer (22) through a sleeve I (5), and a base (10) is fixedly connected to the trailer (22) through bolts and provides support for a hydraulic rod (19); one end of a hauling rope (3) is fixedly connected to a horizontal longitudinal beam (1) of a trailer (22), and the other end of the hauling rope (3) is fixedly connected to a self-propelled ship model (26);
the second step is that: the line is connected, and the force sensor (8) and the hydraulic system (11) are both connected to a control computer (24) through a signal line (13); a signal threshold value for starting the hydraulic system (11) is set through a control computer (24);
the third step: when the operation is started, the trailer (22) is started and pulls the traction rope (3), the traction rope (3) applies load to the hydraulic rod (19) through the pulley block (2), the load is gradually increased along with the movement of the trailer (22), and the force sensor (8) detects the load value applied to the hydraulic rod (19) and transmits the load value to the control computer (24);
the fourth step: the hydraulic system is started, when the load value received by the control computer (24) reaches a set signal threshold value, the control computer (24) sends a control signal to start the hydraulic system (11), the traction rope (3) is tightened through the hydraulic rod (19), and then the traction rope (3) tensions the self-propelled ship model (26), so that the stopped self-propelled ship model (26) starts to move along with the trailer (22), and the damage of the inertial load to the self-propelled ship model (26) is reduced;
the fifth step: the hydraulic system stops, when the speed of the self-propelled ship model (26) is increased to be consistent with that of the trailer (22), the load applied to the hydraulic rod (19) by the traction rope (3) is gradually reduced, and when the load value received by the control computer (24) is lower than a set signal threshold value, the control computer (24) sends out a control signal to stop the hydraulic system (11); at the moment, the test of the self-propelled ship model (26) is formally started;
and a sixth step: the hydraulic system is started, after the test is finished, the trailer (22) performs deceleration movement, the traction rope (3) is under the action of the load of the inertial movement of the self-propelled ship model (26), the load is gradually increased, when the load value received by the control computer (24) reaches a set signal threshold value, the control computer (24) sends a control signal to start the hydraulic system (11), the traction rope (3) is tightened through the hydraulic rod (19), and the self-propelled ship model (26) is gradually decelerated;
the seventh step: and (3) closing the hydraulic system, reducing the load force borne by the traction rope (3) when the self-propelled ship model (26) and the trailer (22) are decelerated to stop, and sending a control signal to close the hydraulic system (11) when the load value received by the control computer (24) is lower than a set signal threshold value.
2. The wave-loaded self-propelled ship model test protection device of claim 1, characterized in that: the hydraulic rod (19) has the structure that: the hydraulic system comprises an outer cylinder (15), a piston rod (16) is installed in the outer cylinder (15), one end of the piston rod (16) extends out of the outer cylinder (15) and is provided with a pulley block (2), hydraulic oil (6) is installed in the outer cylinder (15) located at the other end of the piston rod (16), and the hydraulic oil (6) is connected to a hydraulic system (11) through an oil pipe (12).
3. The wave-loaded self-propelled ship model test protection device of claim 1, characterized in that: the base (10) is formed by fixedly connecting two vertical mounting blocks, the end heads of the two mounting blocks are respectively provided with a flange plate III (17) and a flange plate IV (18), and the flange plate III (17) and the flange plate IV (18) are respectively connected with a trailer (22) through bolts.
4. The wave-loaded self-propelled ship model test protection device of claim 1, characterized in that: the end of the hydraulic rod (19) is provided with a groove, the pulley block (2) is a seamless pulley block formed by two pulleys, the two pulleys are embedded in the groove of the hydraulic rod (19) in parallel, and the central shaft of each pulley is perpendicular to the length direction of the hydraulic rod (19).
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| CN201910529464.4A CN110186648B (en) | 2019-06-19 | 2019-06-19 | Wave load self-propelled ship model test protection device and use method thereof |
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| CN111114713B (en) * | 2019-12-19 | 2022-04-01 | 中国船舶工业集团公司第七0八研究所 | Towing device |
| CN112606968B (en) * | 2020-12-17 | 2022-03-25 | 武汉理工大学 | Hull model hydrodynamic test device suitable for damaged boats and ships |
| CN113029799B (en) * | 2021-03-31 | 2022-07-29 | 武汉理工大学 | Detachable surface load loading device |
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