CN111547201B - Ship model heeling locking device and moment measuring method - Google Patents
Ship model heeling locking device and moment measuring method Download PDFInfo
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- CN111547201B CN111547201B CN202010401334.5A CN202010401334A CN111547201B CN 111547201 B CN111547201 B CN 111547201B CN 202010401334 A CN202010401334 A CN 202010401334A CN 111547201 B CN111547201 B CN 111547201B
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- expansion ring
- shaft
- hollow cylinder
- ship model
- conical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/20—Designing vessels; Predicting their performance using towing tanks or model basins for designing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
Abstract
The invention provides a ship model heeling locking device. The invention further provides a torque measuring method. According to the invention, the problems of locking of the heeling and measurement of the heeling moment in the four-degree-of-freedom modeling of the maneuverability are solved by mounting the torque sensor on the rotating shaft. The invention not only solves the problem of convenient adjustment of the transverse inclination angle, but also solves the problem of measurement precision of the transverse inclination moment, is a foundation and key point for high-precision measurement of the transverse inclination moment of the ship, and is beneficial to improving the technical level of ship hydrodynamic tests. The technical scheme provided by the invention has the advantages of ingenious conception, simple structure, excellent process performance and strong operability, and the common parts are skillfully combined to realize the function of measuring the ship heeling moment, thereby laying the foundation for measuring the ship heeling moment with high precision and improving the ship hydrodynamic test technology in China.
Description
Technical Field
The invention relates to a device suitable for heeling locking and moment measurement and a measurement method adopting the device, in particular to a test device for measuring the heeling moment of a ship model and a measurement method adopting the test device, and belongs to the field of ship hydrodynamic measurement.
Background
Maneuverability is one of the very important properties of a ship, and in relation to operational safety of the ship, accurate performance prediction can reduce the risk of ship maneuvering. In the development stage of the ship, due to the change of the ship shape, the increase of the gravity center of the ship and the high navigational speed, the traditional three-degree-of-freedom maneuvering motion mathematical model including surging, swaying and shaking heads cannot meet the requirement of maneuvering prediction, and the establishment of the four-degree-of-freedom mathematical model including the maneuvering motion in heeling and the measurement of all hydrodynamic derivatives are the key for accurately predicting the maneuverability of the ship. In the model test, a constraint model test method is generally adopted to obtain the ship maneuverability hydrodynamic derivative. The constrained mode test is mainly characterized in that mechanical control is adopted, a ship model is forced to do specified movement, the hydrodynamic force of the ship body including the roll moment is measured by using a sensor, the roll angle is fixed at the moment, and the constrained mode test is different from the measurement of the forced roll moment of which the roll movement is a sine curve.
At present, a sensor which processes a transverse moment component of a ship body together with a longitudinal force and a transverse force component of the ship body has a plurality of defects, such as mutual interference, incapability of reaching a specified position in installation, incapability of reaching a required measuring range by a certain component of the sensor or large range of a certain vector, and the fact that measured hydrodynamic force needs to be converted again or the measuring accuracy is inaccurate. In addition, in the measurement of the heeling moment, in order to enable the ship model to generate heeling, the method of fixing the angle block on the installation base plane of the ship bottom also brings great inconvenience to the installation and measurement of the test. In the face of a large number of test working conditions, how to not only facilitate the adjustment of the transverse inclination angle and accurately measure the transverse inclination moment but also facilitate the installation of testers, and all the key problems need to be solved urgently.
Disclosure of Invention
The purpose of the invention is: the accurate measurement of the ship heeling moment is realized.
In order to achieve the purpose, the invention provides a ship model heeling locking device which is characterized by comprising a hollow cylinder, a cylinder expansion ring, a conical expansion ring, a torque sensor and a shaft, wherein the end surface of the hollow cylinder is connected with the torque sensor, the end part of the shaft penetrates through the torque sensor and then is positioned in the hollow cylinder, and the torque sensor is fixedly connected with the shaft; n screw holes I are uniformly distributed on the cylindrical expansion ring along the circumferential direction, N is more than or equal to 3, and the cylindrical expansion ring is sleeved into the hollow cylinder through a shaft; the two ends of the conical expansion ring are respectively a minimum end face circle and a maximum end face circle, N round holes and M screw holes II are uniformly distributed on the maximum end face circle along the circumferential direction, M is more than or equal to 3, after the part containing the minimum end face circle in the conical expansion ring is sleeved into the cylindrical expansion ring through a shaft, the maximum end face circle is exposed out of the hollow cylinder, the positions of the N round holes on the maximum end face circle correspond to the positions of the N screw holes I on the cylindrical expansion ring one by one, and the N screws penetrate into the N screw holes I through the N round holes and then are transversely inclined to be locked; after M screws are screwed into M screw holes II, the conical expansion ring can be ejected out of the cylindrical expansion ring, and the transverse inclination is released.
Preferably, the device further comprises a base, the bottom surface of the hollow cylinder is fixedly connected with the base, the bottom surface of the hollow cylinder is kept horizontal, and the bottom surface of the base is kept horizontal.
Preferably, the conical expansion ring is fixed on the shaft through a deformation hoop.
Preferably, the cylindrical expansion ring is arranged on the conical expansion ring through a deformation hoop.
Preferably, the conical expansion ring is deformed by four grooves uniformly formed in the conical expansion ring along the circumferential direction; the cylindrical expansion ring is deformed through a groove formed in the cylindrical expansion ring.
Preferably, the axial centerline of the shaft is maintained on the same horizontal line as the axial centerline of the torque sensor.
Preferably, the end face of the hollow cylinder fixedly connected with the torque sensor is flat and perpendicular to the horizontal plane.
Preferably, after the cylindrical expansion ring is sleeved into the hollow cylinder, the outer diameter of the cylindrical expansion ring is just matched with the inner diameter of the hollow cylinder, and the axial center line of the cylindrical expansion ring is on the same horizontal line with the axial center line of the shaft.
Preferably, the smallest round end face of the conical expansion ring is matched with the size of the shaft, and the axial center line of the conical expansion ring is on the same horizontal line with the axial center line of the shaft.
Another technical solution of the present invention is to provide a torque measurement method, which is characterized in that the ship model list locking device includes the following steps:
a) the two sets of ship model heeling locking devices are symmetrically arranged at two sides of the longitudinal position of the gravity center of the ship model from left to right along the longitudinal section line of the ship model, and the horizontal center line of the shaft is flush with the height position of the gravity center of the ship model;
b) sleeving the cylindrical expansion ring into the hollow cylinder through the shaft, wherein the outer diameter of the cylindrical expansion ring is just matched with the inner diameter of the hollow cylinder, and the axial center line of the cylindrical expansion ring and the axial center line of the shaft are on the same horizontal line;
c) sleeving the conical expansion ring into the cylindrical expansion ring through the shaft, wherein the minimum end face circle of the conical expansion ring is matched with the size of the shaft, and the axial center line of the conical expansion ring and the axial center line of the shaft are on the same horizontal line;
d) rotating the torque sensor to a certain angle, inserting N screws into N round holes on the conical expansion ring, rotating the N screws to enter N screw holes I of the cylindrical expansion ring, transversely inclining, namely locking, keeping the outer end face of the conical expansion ring just flush with the outer end face of the hollow cylinder, and measuring transverse inclination moment through the torque sensor;
e) after the measurement of horizontal slope locking and completion horizontal slope moment, will simultaneously N screw in the N round hole on the toper swell is followed N screw hole one of cylinder swell is unscrewed to with M screw through two rotations of screw hole the cylinder swell upper surface, can with the toper swell is followed ejecting in the cylinder swell, horizontal slope release this moment.
According to the ship model heeling locking device and the moment measuring method adopting the ship model heeling locking device, the problems of heeling locking, heeling moment measurement and the like in four-degree-of-freedom modeling of maneuverability are solved by mounting the torque sensor on the rotating shaft. The invention not only solves the problem of convenient adjustment of the transverse inclination angle, but also solves the problem of measurement precision of the transverse inclination moment, is a foundation and key point for high-precision measurement of the transverse inclination moment of the ship, and is beneficial to improving the technical level of ship hydrodynamic tests.
Compared with the prior art, the technical scheme of the invention aims at the ship heeling moment measurement test and solves the problems of measurement of heeling hydrodynamic derivative, convenient heeling angle rotation and the like in the maneuverability four-degree-of-freedom modeling. The technical scheme provided by the invention has the advantages of ingenious conception, simple structure, excellent process performance and strong operability, and the common parts are skillfully combined to realize the function of measuring the ship heeling moment, thereby laying the foundation for measuring the ship heeling moment with high precision and improving the ship hydrodynamic test technology in China.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a hollow cylinder according to the present invention;
FIG. 3 is a schematic structural view of the cylindrical expander of the present invention;
fig. 4 is a schematic view of the construction of the conical expander of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiments of the present invention will be specifically explained with reference to the drawings attached to the specification.
The embodiment discloses a ship model heeling locking device and a moment measuring method adopting the ship model heeling locking device, and solves the problems of heeling locking, heeling moment measurement and the like in four-degree-of-freedom modeling of maneuverability by mounting a torque sensor on a rotating shaft.
Specifically, as shown in fig. 1, in the present embodiment, the torque sensor 4 is fixedly attached to the shaft 5, the axial center line of the torque sensor 4 is maintained on the same level as the axial center line of the shaft 5, and the torque sensor 4 is hollow so that the shaft 5 can pass through the torque sensor 4.
The end face of the hollow cylinder 1 is fixedly connected with the torque sensor 4, the end face is flat and perpendicular to the horizontal plane, and the end part of the shaft 5 penetrates through the torque sensor 4 and then is located in the hollow cylinder 1.
The bottom surface of the hollow cylinder 1 is fixedly connected with the base 6, the bottom surface of the hollow cylinder 1 is kept horizontal, and the bottom surface of the base 6 is kept horizontal.
With reference to fig. 3, a tiny groove 23 is formed in the cylindrical expansion ring 2 and used for deforming the rear hoop, and 8 screw holes 22 are uniformly distributed in the cylindrical expansion ring 2.
The cylindrical expansion ring 2 is sleeved in the hollow cylinder 1 through the shaft 5 and the conical expansion ring 3. Referring to fig. 2, the outer diameter 21 of the cylindrical expander 2 is exactly matched with the inner diameter 12 of the hollow cylinder 1, and the axial center line of the cylindrical expander 2 is on the same horizontal line with the axial center line of the shaft 5.
With reference to fig. 4, four grooves are uniformly formed in the conical expansion ring 3 for deformation of the rear hoop, 8 round holes 32 and 4 screw holes 35 are uniformly distributed, one end of the conical expansion ring 3 is a minimum end face circle 34, and the other end of the conical expansion ring is a maximum end face circle.
The conical expansion ring 3 is sleeved into the cylindrical expansion ring 2 through the shaft 5, and the minimum end face circle 34 of the conical expansion ring 3 is matched with the shaft 5 in size but is larger than the end face circle 24 in the cylindrical expansion ring 2. The portion of the conical expander 3 comprising the smallest end circle 34 is anchored outside the end of the shaft 5 located inside the hollow cylinder 1, which portion is defined as the inside of the hollow cylinder, and the cylindrical expander 2 is anchored outside the inside of the hollow cylinder. The remaining part of the conical expansion ring 3 excluding the interior of the hollow cylinder is exposed outside the hollow cylinder 1, and the remaining part includes the largest end face circle. The axial center line of the conical expansion ring 3 and the axial center line of the shaft 5 are on the same horizontal line.
Rotate torque sensor 4 to certain angle, insert 8 screws simultaneously in 8 round holes 32 on toper expansion ring 3 and rotate 8 screw holes 22 that get into cylinder expansion ring 2, the heeling can be locked, and the outer terminal surface of toper expansion ring 3 is just in time with the outer terminal surface parallel and level of cavity cylinder 1 this moment.
After the horizontal inclination is locked, 8 screws in 8 round holes 32 on the conical expansion ring 3 are simultaneously screwed out from 8 screw holes 22 of the cylindrical expansion ring 2, and four screws are screwed on the upper surface of the conical expansion ring 3, so that the conical expansion ring 3 can be ejected out from the cylindrical expansion ring 2.
In practical applications, the ship model list locking device provided by the embodiment can be installed through the following steps:
a) the two sets of ship model heeling locking devices are symmetrically arranged at two sides of the longitudinal position of the gravity center of the ship model from left to right along the longitudinal section line of the ship model, and the horizontal center line of the shaft 5 is flush with the height position of the gravity center of the ship model;
b) sleeving a cylindrical expansion ring 2 into a hollow cylinder 1 through a shaft 5, wherein the outer diameter 21 of the cylindrical expansion ring 2 is just matched with the inner diameter 12 of the hollow cylinder 1, and the axial center line of the cylindrical expansion ring 2 and the axial center line of the shaft 5 are on the same horizontal line;
c) the conical expansion ring 3 is sleeved into the cylindrical expansion ring 2 through the shaft 5, the minimum end face circle 34 of the conical expansion ring 3 is matched with the shaft 5 in size, and the axial center line of the conical expansion ring 3 and the axial center line of the shaft 5 are on the same horizontal line;
d) rotating the torque sensor 4 to a certain angle, simultaneously inserting 8 screws into 8 round holes 32 on the conical expansion ring 3 to rotate to enter 8 screw holes 22 of the cylindrical expansion ring 2, transversely inclining, namely locking, keeping the outer end face of the conical expansion ring 3 just flush with the outer end face of the hollow cylinder 1, and then measuring transverse inclination moment through the torque sensor 4;
e) after the measurement of horizontal slope locking and completion horizontal slope moment, 8 screws in 8 round holes 32 on the toper swell 3 are simultaneously screwed out from 8 screw holes 22 of cylinder swell 2 to revolve four screws to the upper surface of cylinder swell 2 through screw hole 35, can follow the toper swell 3 and ejecting in the cylinder swell 2, horizontal slope release this moment.
Claims (10)
1. A ship model heeling locking device is characterized by comprising a hollow cylinder, a cylindrical expansion ring, a conical expansion ring, a torque sensor and a shaft, wherein the end surface of the hollow cylinder is connected with the torque sensor; n screw holes I are uniformly distributed on the cylindrical expansion ring along the circumferential direction, N is more than or equal to 3, and the cylindrical expansion ring is sleeved into the hollow cylinder through a shaft; the two ends of the conical expansion ring are respectively a minimum end face circle and a maximum end face circle, N round holes and M screw holes II are uniformly distributed on the maximum end face circle along the circumferential direction, M is more than or equal to 3, after the part containing the minimum end face circle in the conical expansion ring is sleeved into the cylindrical expansion ring through a shaft, the maximum end face circle is exposed out of the hollow cylinder, the positions of the N round holes on the maximum end face circle correspond to the positions of the N screw holes I on the cylindrical expansion ring one by one, and the N screws penetrate into the N screw holes I through the N round holes and then are transversely inclined to be locked; after M screws are screwed into M screw holes II, the conical expansion ring can be ejected out of the cylindrical expansion ring, and the transverse inclination is released.
2. The ship model list locking device of claim 1, further comprising a base, wherein the bottom surface of the hollow cylinder is fixedly connected with the base, the bottom surface of the hollow cylinder is kept horizontal, and the bottom surface of the base is kept horizontal.
3. The apparatus of claim 1, wherein said tapered expander is secured to said shaft by a swage collar.
4. The apparatus of claim 3, wherein said cylindrical expander is secured to said conical expander by a swage collar.
5. The ship model list locking device of claim 4, wherein said conical expansion ring is deformed by four grooves uniformly opened along the circumferential direction; the cylindrical expansion ring is deformed through a groove formed in the cylindrical expansion ring.
6. The ship model list locking device of claim 1 wherein the axial centerline of said shaft is maintained level with the axial centerline of said torque sensor.
7. The ship model list locking device of claim 1, wherein the end face of the hollow cylinder connected with the torque sensor is flat and vertical to the horizontal plane.
8. The ship model list locking device of claim 1, wherein after the cylindrical expansion ring is sleeved into the hollow cylinder, the outer diameter of the cylindrical expansion ring is just matched with the inner diameter of the hollow cylinder, and the axial center line of the cylindrical expansion ring is on the same horizontal line with the axial center line of the shaft.
9. The ship model list locking device of claim 1 wherein the smallest rounded end of said conical expander is sized to fit said shaft, and the axial centerline of said conical expander is level with the axial centerline of said shaft.
10. A moment measuring method, wherein the ship model list locking device according to claim 1 is adopted, comprising the steps of:
a) the ship model heeling locking device comprises two sets of ship model heeling locking devices according to claim 1, wherein the two sets of heeling locking devices are arranged on two sides of the longitudinal position of the gravity center of a ship model in a left-right symmetrical mode along the longitudinal section line of the ship model, and the horizontal center line of a shaft is flush with the height position of the gravity center of the ship model;
b) sleeving the cylindrical expansion ring into the hollow cylinder through the shaft, wherein the outer diameter of the cylindrical expansion ring is just matched with the inner diameter of the hollow cylinder, and the axial center line of the cylindrical expansion ring and the axial center line of the shaft are on the same horizontal line;
c) sleeving the conical expansion ring into the cylindrical expansion ring through the shaft, wherein the minimum end face circle of the conical expansion ring is matched with the size of the shaft, and the axial center line of the conical expansion ring and the axial center line of the shaft are on the same horizontal line;
d) rotating the torque sensor to a certain angle, inserting N screws into N round holes on the conical expansion ring, rotating the N screws to enter N screw holes I of the cylindrical expansion ring, transversely inclining, namely locking, keeping the outer end face of the conical expansion ring just flush with the outer end face of the hollow cylinder, and measuring transverse inclination moment through the torque sensor;
e) after the measurement of horizontal slope locking and completion horizontal slope moment, will simultaneously N screw in the N round hole on the toper swell is followed N screw hole one of cylinder swell is unscrewed to with M screw through two rotations of screw hole the cylinder swell upper surface, can with the toper swell is followed ejecting in the cylinder swell, horizontal slope release this moment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010401334.5A CN111547201B (en) | 2020-05-13 | 2020-05-13 | Ship model heeling locking device and moment measuring method |
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| CN202010401334.5A CN111547201B (en) | 2020-05-13 | 2020-05-13 | Ship model heeling locking device and moment measuring method |
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| CN111547201B true CN111547201B (en) | 2021-03-12 |
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| CN113092005B (en) * | 2021-03-26 | 2023-04-21 | 中国船舶工业集团公司第七0八研究所 | Ship propeller rotor water rotation inertia test determination method and application |
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| RU2110052C1 (en) * | 1996-07-23 | 1998-04-27 | Центральный научно-исследовательский институт им.акад.А.Н.Крылова | Towing carriage for experimental model basin |
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