CN112697367A - Boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment platform - Google Patents
Boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment platform Download PDFInfo
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- CN112697367A CN112697367A CN202011538802.XA CN202011538802A CN112697367A CN 112697367 A CN112697367 A CN 112697367A CN 202011538802 A CN202011538802 A CN 202011538802A CN 112697367 A CN112697367 A CN 112697367A
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- 230000008878 coupling Effects 0.000 title claims abstract description 28
- 238000010168 coupling process Methods 0.000 title claims abstract description 28
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 28
- 238000002474 experimental method Methods 0.000 title claims abstract description 23
- 230000003068 static effect Effects 0.000 claims abstract description 26
- 230000005284 excitation Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 230000001050 lubricating effect Effects 0.000 claims abstract description 13
- 239000003921 oil Substances 0.000 claims description 26
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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Abstract
The invention relates to a ship propulsion shafting longitudinal and transverse coupling vibration experiment table, which comprises: the device comprises a base, a bearing unit, a centering and leveling unit, a lubricating unit, a propulsion shafting, a propeller simulating disc, a counterweight disc, a harmonic signal generator, a modal vibration exciter, a static thrust generating unit, a driving unit and a state monitoring system. According to the invention, a propulsion shafting and a propeller simulating disc formed by scaling are clamped on a base, and then a static thrust generating unit is started to enable a top plate to be horizontally pushed forward and a push rod on the top plate to be abutted against an auxiliary excitation head on the propeller simulating disc so as to generate static thrust on the propeller simulating disc, so that the water flow reverse thrust effect of a propeller when the ship propulsion shafting is in stable operation is simulated, and at the moment, a modal vibration exciter is started to generate alternating excitation force on the propulsion shafting and the propeller simulating disc by using the excitation effect of an armature in the modal vibration exciter, so that the unstable thrust effect of the propeller on the propulsion shafting is simulated.
Description
Technical Field
The invention relates to the technical field of ship shafting vibration tests, in particular to a ship propulsion shafting longitudinal and transverse coupling vibration experiment table.
Background
A propulsion shafting in the ship power system transmits the power of a main engine to a propeller and transmits the thrust generated by the propeller to a ship body, so that the ship can advance. With the increase of the power and the size of the ship, the ship shafting tends to have the characteristics of long span and multiple supports, the vibration problem is more prominent, and the longitudinal and transverse coupling vibration problem of the ship shafting is gradually a hot point of research in recent years.
At present, most of the experimental research on the ship propulsion shafting focuses on the shafting and the coupling research of the shafting and the ship body, wherein the experimental research on the longitudinal and transverse coupling of the large ship propulsion shafting, particularly the longitudinal and transverse coupling experimental research on the large ship propulsion shafting under the hydrodynamic excitation of propellers, is rarely seen.
Disclosure of Invention
Aiming at the problems, the ship propulsion shafting longitudinal and transverse coupling vibration experiment table with ideal excitation force loading condition and good operation effect is provided.
The specific technical scheme is as follows:
a marine propulsion shafting longitudinal and transverse coupling vibration experiment table has the following characteristics: the device comprises a base, a bearing unit, a centering and leveling unit, a lubricating unit, a propulsion shafting, a propeller simulating disc, a counterweight disc, a harmonic signal generator, a modal vibration exciter, a static thrust generating unit, a driving unit and a state monitoring system for monitoring the state of the propulsion shafting;
the bottom of a bearing seat in the bearing unit is arranged on the base through a bolt, and the centering and leveling unit is arranged on the bearing seat and used for finely adjusting the bearing unit;
the propulsion shaft system is arranged on a sliding bearing in the bearing unit, one end of the propulsion shaft system is connected to a connector in the driving unit, a stern shaft of the propulsion shaft system is connected to the imitated paddle disk, and the counterweight disk is arranged on the propulsion shaft system;
the lubricating unit is arranged on the bearing unit and is used for lubricating the sliding bearing;
a top plate in the static thrust generation unit can be horizontally pushed forward, and a push rod on the top plate is abutted against an auxiliary excitation head on the imitated paddle disk so as to apply static thrust to the imitated paddle disk and a propulsion shafting;
the harmonic signal generator is electrically connected with the modal vibration exciter, and when the push rod on the top plate is abutted against the auxiliary excitation head, the armature in the modal vibration exciter can act on the top plate so as to apply alternating excitation force to the imitated paddle disk and the propulsion shafting.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the centering and leveling unit is an adjusting bolt, the adjusting bolt is spirally connected to the bearing seat, and the bottom of the adjusting bolt can penetrate through the bearing seat and abut against the base.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the lubricating unit comprises an oil feeding pipe, an oil collecting disc and an oil return pipe, the oil feeding pipe is arranged on the sliding bearing and used for conveying lubricating oil to the sliding bearing, the oil collecting disc is correspondingly arranged around the sliding bearing and used for collecting the lubricating oil overflowing from the sliding bearing, and the oil return pipe is correspondingly arranged on the oil collecting disc.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the static thrust generation unit further comprises an air pump and a plurality of pneumatic springs, the pneumatic springs are arranged at intervals from top to bottom, air inlets of the pneumatic springs are communicated with air outlets of the air pump, and the top plate is arranged on the pneumatic springs.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the static thrust generation unit further comprises a fixed steel wire, and one end of the fixed steel wire is detachably connected to the top plate.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the driving unit further comprises a speed reducing motor, and the connector is mounted on an output shaft of the speed reducing motor.
The ship propulsion shafting longitudinal and transverse coupling vibration experiment table is characterized in that the state monitoring system comprises an eddy current displacement sensor for monitoring a propulsion shafting displacement signal, an acceleration sensor for monitoring acceleration of the propulsion shafting and a force sensor for monitoring static thrust, and the force sensor is arranged between the pneumatic spring and the top plate.
The beneficial effect of above-mentioned scheme is:
the invention can clamp a propulsion shafting and a simulation paddle disk formed by scaling on a base, and then starts a static thrust generating unit to enable a top plate to horizontally push forward and enable a push rod on the top plate to abut against an auxiliary excitation head on the simulation paddle disk to generate static thrust on the simulation paddle disk, so that the water flow reverse thrust action suffered by a propeller when the marine propulsion shafting is stably operated is simulated, and then starts a modal vibration exciter to generate alternating excitation force on the propulsion shafting and the simulation paddle disk by utilizing the excitation action of an armature in the modal vibration exciter, so that the unstable thrust action of the propeller suffered by the propulsion shafting is simulated, and then a state monitoring system is utilized to obtain experimental data of the propulsion shafting and the simulation paddle disk, so that the vibration states of the propulsion shafting and the simulation paddle disk can be known after data processing, and the vibration characteristics of the marine propulsion shafting can be analyzed.
Drawings
Fig. 1 is a schematic structural diagram of a vibration experiment table provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 corresponding to the letter A;
FIG. 3 is a partial enlarged view of a portion corresponding to the letter B in FIG. 1;
fig. 4 is a schematic structural view of the connector of the present invention.
In the drawings: 1. a base; 2. a propulsion shaft system; 3. simulating a paddle disk; 4. a weight plate; 5. a harmonic signal generator; 6. a modal vibration exciter; 7. a bearing seat; 8. a sliding bearing; 9. a connector; 10. a top plate; 11. a push rod; 12. adjusting the bolt; 13. an oil delivery pipe; 14. an oil collecting tray; 15. an air pump; 16. a pneumatic spring; 17. fixing the steel wire; 18. a reduction motor; 19. a coupling disc; 20. a disc spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
As shown in fig. 1 to 3, a vibration experiment table provided in an embodiment of the present invention includes a base 1, a bearing unit, a centering and leveling unit, a lubricating unit, a propulsion shafting 2, a propeller disc 3, a counterweight disc 4, a harmonic signal generator 5, a modal exciter 6 (in the present invention, an ESD-045 type exciter), a static thrust generating unit, a driving unit, and a state monitoring system for monitoring a state of the propulsion shafting 2; the bottom of a bearing seat 7 in the bearing unit is arranged on the base 1 through a bolt, and the centering leveling unit is arranged on the bearing seat 7 and is used for finely adjusting the bearing unit; the propulsion shaft system 2 is arranged on a sliding bearing 8 in a bearing unit, one end of the propulsion shaft system 2 is connected to a connector 9 in a driving unit, a stern shaft of the propulsion shaft system 2 is connected to the imitated propeller disc 3, and the counterweight disc 4 is arranged on the propulsion shaft system 2 (so as to simulate different shaft system mass unbalance effects by changing the position and weight of the counterweight disc 4); the lubricating unit is mounted on the bearing unit and is used for lubricating the sliding bearing 8; a top plate 10 in the static thrust generation unit can be horizontally pushed forward, and a push rod 11 on the top plate 10 is abutted against an auxiliary excitation head on the imitated paddle disk 3 so as to apply static thrust to the imitated paddle disk 3 and the propulsion shafting 2; the harmonic signal generator 5 is electrically connected with the modal vibration exciter 6, and when the push rod 11 on the top plate 10 abuts against the auxiliary excitation head, the armature in the modal vibration exciter 6 can act on the top plate 10 to apply alternating excitation force to the imitated paddle disk 3 and the propulsion shafting 2.
In the invention, after the bearing units are installed, a centering leveling unit is used for finely adjusting each bearing unit, then a propulsion shafting 2 and a simulated propeller disk 3 formed by scaling are clamped on a base 1, a static thrust generating unit is started, a top plate 10 is horizontally pushed forward, a push rod 11 on the top plate 10 is abutted against an auxiliary excitation head on the simulated propeller disk 3 to generate static thrust on the simulated propeller disk 3, so that the water flow reverse thrust action suffered by a propeller when the ship propulsion shafting is in stable operation is simulated, a modal vibration exciter 6 is started at the moment, alternating excitation force is generated on the propulsion shafting 2 and the simulated propeller disk 3 by using the excitation action of an armature in the modal vibration exciter 6, the unstable propeller propelling force borne by the shafting is simulated, and then a state monitoring system is used for acquiring experimental data of the propulsion shafting and the simulated propeller disk so as to acquire the vibration states of the propulsion shafting and the simulated propeller disk after data processing, and further analyzing the vibration characteristics of the ship propulsion shafting.
In the invention, the frequency and the amplitude of the alternating exciting force are adjusted by the harmonic signal generator 5.
Specifically, the centering leveling unit is an adjusting bolt 12, the adjusting bolt 12 is spirally connected to the bearing seat 7, and the bottom of the adjusting bolt 12 can penetrate through the bearing seat 7 and abut against the base 1, so that the position of each bearing unit can be finely adjusted by using the adjusting bolt 12 after the bearing units are installed, and the propulsion shaft system is ensured to be in the optimal centering state. In particular, the school status can be measured by measuring the minimum pull force required to rotate the dummy paddle.
Specifically, the lubricating unit comprises an oil feeding pipe 13, an oil collecting disc 14 and an oil return pipe, wherein the oil feeding pipe 13 is installed on the sliding bearing 8 and used for feeding lubricating oil to the sliding bearing 8, the oil collecting disc 14 is correspondingly installed around the sliding bearing 8 and used for collecting the lubricating oil overflowing from the sliding bearing 8, the oil return pipe is correspondingly installed on the oil collecting disc 14 and used for recovering the collected lubricating oil, and the other ends of the oil feeding pipe 13 and the oil return pipe can be correspondingly communicated with an oil supply tank so as to feed and recover the lubricating oil.
Specifically, the static thrust generation unit further comprises an air pump 15 and a plurality of pneumatic springs 16, the pneumatic springs 16 are arranged at intervals up and down, air inlets of the pneumatic springs 16 are communicated with air outlets of the air pump 15, and the top plate 10 is installed on the pneumatic springs 16, so that when the air pump 15 is started, the pneumatic springs 16 are inflated and extended, and the top plate 10 is pushed to enable the push rods 11 on the top plate to abut against auxiliary excitation heads on the imitated propeller disc 3, and static thrust is generated on the propulsion shafting 2 and the imitated propeller disc 3. The static thrust is adjusted by adjusting the pressure in the pneumatic spring 16. In order to prevent the deformation of the pneumatic spring 16, the invention can discharge the gas in the pneumatic spring 16 after the experiment is finished, then one end of the fixing steel wire 17 is tied on the top plate 10, and the other end of the fixing steel wire 17 is effectively fixed, so as to prevent the deformation of the pneumatic spring 16 under the action of gravity and influence the testing precision and the like during the secondary experiment.
Specifically, the driving unit of the present invention further includes a reduction motor 18, and the connector 9 is keyed on an output shaft of the reduction motor 18. As shown in fig. 4, in the present invention, a coupling disk 19 is installed in the connector 9, a plurality of disc springs 20 are installed on the coupling disk 19, the coupling disk 19 is keyed on the connector 9, and the propulsion shafting 2 is keyed on the coupling disk 19, so that the rotation motion of the reduction motor 18 is transmitted to the propulsion shafting 2. In the invention, when the propulsion shafting is subjected to right thrust, the right disc spring 19 is compressed, so that the effect of buffering and absorbing vibration can be achieved on the shafting, and the problem of shafting damage caused by direct contact of the propulsion shafting 2 and the shell of the connector 9 is avoided.
Specifically, the state monitoring system comprises an eddy current displacement sensor for monitoring displacement signals of the propulsion shafting 2, an acceleration sensor for monitoring acceleration of the propulsion shafting 2 and a force sensor for monitoring static thrust, wherein the force sensor is arranged between the pneumatic spring 16 and the top plate 10, and the acquired signals are processed by a terminal to obtain natural frequency and vibration response of the propulsion shafting 2 and the simulated paddle disk 3.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment table which characterized in that includes: the device comprises a base (1), a bearing unit, a centering and leveling unit, a lubricating unit, a propulsion shafting (2), a simulation paddle disk (3), a counterweight disk (4), a harmonic signal generator (5), a modal vibration exciter (6), a static thrust generating unit, a driving unit and a state monitoring system for monitoring the state of the propulsion shafting (2);
the bottom of a bearing seat (7) in the bearing unit is mounted on the base (1) through a bolt, and the centering leveling unit is mounted on the bearing seat (7) and used for finely adjusting the bearing unit;
the propulsion shaft system (2) is mounted on a sliding bearing (8) in the bearing unit, one end of the propulsion shaft system (2) is connected to a connector (9) in the driving unit, a stern shaft of the propulsion shaft system (2) is connected to the imitated paddle disk (3), and the counterweight disk (4) is mounted on the propulsion shaft system (2);
the lubricating unit is mounted on the bearing unit and is used for lubricating the sliding bearing (8);
a top plate (10) in the static thrust generation unit can be horizontally pushed forwards, and a push rod (11) on the top plate (10) is abutted against an auxiliary excitation head on the imitated paddle disk (3) so as to apply static thrust to the imitated paddle disk (3) and the propulsion shafting (2);
the harmonic signal generator (5) is electrically connected with the modal vibration exciter (6), and when a push rod (11) on the top plate (10) abuts against the auxiliary excitation head, an armature in the modal vibration exciter (6) can act on the top plate (10) so as to apply alternating excitation force to the imitated paddle disc (3) and the propulsion shafting (2).
2. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table of claim 1, wherein the centering and leveling unit is an adjusting bolt (12), the adjusting bolt (12) is screwed on the bearing seat (7), and the bottom of the adjusting bolt (12) can penetrate through the bearing seat (7) and abut against the base (1).
3. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table according to claim 1, wherein the lubricating unit comprises an oil feed pipe (13), an oil collecting tray (14) and an oil return pipe, the oil feed pipe (13) is installed on the sliding bearing (8) and used for feeding lubricating oil to the sliding bearing (8), the oil collecting tray (14) is correspondingly installed around the sliding bearing (8) and used for collecting the lubricating oil overflowing from the sliding bearing (8), and the oil return pipe is correspondingly installed on the oil collecting tray (14).
4. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table according to claim 1, wherein the static thrust generation unit further comprises an air pump (15) and a plurality of pneumatic springs (16), the pneumatic springs (16) are arranged at intervals up and down, air inlets of the pneumatic springs (16) are communicated with air outlets of the air pump (15), and the top plate (10) is mounted on the pneumatic springs (16).
5. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table of claim 4, wherein the static thrust generation unit further comprises a fixing steel wire (17), and one end of the fixing steel wire (17) is detachably connected to the top plate (10).
6. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table of claim 1, wherein the driving unit further comprises a speed reduction motor (18), and the connector (9) is mounted on an output shaft of the speed reduction motor (18).
7. The marine propulsion shafting longitudinal and transverse coupling vibration experiment table according to claim 1, wherein the state monitoring system comprises an eddy current displacement sensor for monitoring the displacement signal of the propulsion shafting (2), an acceleration sensor for monitoring the acceleration of the propulsion shafting (2) and a force sensor for monitoring the static thrust, and the force sensor is installed between the pneumatic spring (16) and the top plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538802.XA CN112697367A (en) | 2020-12-23 | 2020-12-23 | Boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011538802.XA CN112697367A (en) | 2020-12-23 | 2020-12-23 | Boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment platform |
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| CN202011538802.XA Pending CN112697367A (en) | 2020-12-23 | 2020-12-23 | Boats and ships propulsion shafting longitudinal and transverse coupling vibration experiment platform |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113401314A (en) * | 2021-06-25 | 2021-09-17 | 武汉理工大学 | Simulation device for misalignment fault of propulsion shaft system and misalignment adjusting method |
| CN114001941A (en) * | 2021-10-28 | 2022-02-01 | 华中科技大学 | Ship propulsion shafting exciting force centering loading and detecting device |
| CN115508034A (en) * | 2022-11-20 | 2022-12-23 | 中国船舶重工集团公司第七一九研究所 | Ship composite vibration test system and construction method thereof |
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| CN114001941A (en) * | 2021-10-28 | 2022-02-01 | 华中科技大学 | Ship propulsion shafting exciting force centering loading and detecting device |
| CN115508034A (en) * | 2022-11-20 | 2022-12-23 | 中国船舶重工集团公司第七一九研究所 | Ship composite vibration test system and construction method thereof |
| CN115508034B (en) * | 2022-11-20 | 2023-02-28 | 中国船舶重工集团公司第七一九研究所 | Ship composite vibration test system and construction method thereof |
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