CN112407180A - Land simulation platform and test method for ship propulsion system shafting starting process - Google Patents
Land simulation platform and test method for ship propulsion system shafting starting process Download PDFInfo
- Publication number
- CN112407180A CN112407180A CN202011143887.1A CN202011143887A CN112407180A CN 112407180 A CN112407180 A CN 112407180A CN 202011143887 A CN202011143887 A CN 202011143887A CN 112407180 A CN112407180 A CN 112407180A
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- shafting
- test
- short shaft
- ship
- propulsion system
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
- B63B79/20—Monitoring properties or operating parameters of vessels in operation using models or simulation, e.g. statistical models or stochastic models
Abstract
The invention discloses a land simulation platform and a test method for a ship propulsion system shafting starting process. One end of the test short shaft is connected with the propulsion unit directly or through a transmission device, the other end of the test short shaft is connected with an inertia disc, a shafting brake device and a shafting displacement measuring device are installed on the test short shaft, and the test short shaft is supported by a bearing. The method is characterized in that a hydraulic shafting brake device is used for simulating the static friction moment of a real ship shafting, an inertia disc is used for simulating the dynamic friction resistance and the inertia moment of the real ship, a shafting displacement measuring device is used for monitoring the shafting displacement, and the brake release is controlled by monitoring the shafting displacement so as to simulate the change of the moment of resistance in the process of converting the real ship shafting from static state to dynamic state. The method can accurately simulate the starting process of the propulsion system of the real ship at a lower cost on the land, master the starting characteristic of the propulsion system and effectively release the ship loading risk of the propulsion system.
Description
Technical Field
The invention relates to a land simulation platform and a test method for a ship propulsion system shafting starting process, belonging to the field of ship propulsion system design and land joint debugging test of a ship power system.
Background
In the field of design of ship propulsion systems, whether a propulsion unit can overcome the starting resistance of a propulsion shafting is one of the keys of successful design of a power system. Especially for the propulsion system adopting combined propulsion, because the rear transmission and the propeller are generally designed according to the combined operation of a plurality of propulsion units, the rotational inertia and the weight are larger, the single propulsion unit is generally required to drive the rear transmission and the propeller in the starting process, and the output torque of the single propulsion unit can overcome the inertia resistance moment and the friction resistance moment of the rear transmission and the propeller, which is a necessary condition for the successful starting of the propulsion system. Therefore, when designing a ship propulsion system, designers must ensure that the output torque of the propulsion unit can overcome the inertia moment and the friction moment of the rear transmission and the propeller, and ensure that the real ship propulsion system can be started smoothly.
The inertia resisting moment and the friction resisting moment can be estimated by adopting theoretical calculation, but the estimation accuracy is limited, and a clutch connecting and discharging characteristic and a propulsion unit sudden loading characteristic model established in the current theoretical calculation have obvious difference from the actual situation. Therefore, the starting characteristic of the propulsion system can be estimated relatively roughly by adopting theoretical calculation under the condition of the prior art, but the method cannot be used under the condition of high accuracy requirement, and particularly when the output torque of the propulsion unit is estimated to be close to the shafting resistance torque in the range of the row-connecting rotating speed, a method for further detailed calculation is lacked.
If the test is carried out according to a real ship in the onshore joint debugging test, huge manpower and material resources must be invested, and the cost is extremely high.
Therefore, a simulation test method is needed to be designed, the starting process of the propulsion system of the real ship can be simulated accurately through a simulation test on land, the starting process and the characteristics of the propulsion system of the real ship can be mastered in the design stage at low cost, and the ship loading risk of the propulsion system can be solved in advance.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the real ship propulsion system starting process is simulated in the land test.
In order to solve the problems, the technical scheme of the invention provides a land simulation platform for a ship propulsion system shafting starting process, which is characterized in that: the device comprises a short shaft for test, a bearing, a shafting brake device, an inertia disc, a shafting displacement measuring device and a control device;
the test short shaft is supported by a bearing, one end of the test short shaft is connected with the propulsion unit and driven by the propulsion unit to rotate, and the other end of the test short shaft is connected with the inertia disc which is used for simulating dynamic friction moment and inertia moment of the shaft system in the process of converting the real ship shaft system from static state to dynamic state;
the shafting brake device and the shafting displacement measuring device are arranged on the short shaft for testing, and the shafting brake device is used for simulating the shafting static friction moment in the process of converting the real ship shafting from static state to dynamic state; the shafting displacement measuring device is used for detecting shafting displacement of the short shaft for the test and transmitting a displacement signal to the control device, and the control device controls the shafting brake device to release the brake by monitoring the shafting displacement so as to simulate the change of the resisting moment in the process of converting the real ship shafting from the static state to the dynamic state.
Preferably, the rated braking torque of the shafting braking device is larger than the shafting static friction torque to be simulated, and the shafting braking device can set the braking torque as required.
Preferably, the shafting brake device is a hydraulic shafting brake device and comprises a hydraulic station, a brake disc and a brake, the hydraulic station is connected with the brake disc through the brake, the brake disc is arranged on the short shaft for testing, and the hydraulic station instantly releases pressure after receiving an instruction of the control device, so that the brake is rapidly released, and the instant process that the real ship shafting is converted from a static state to a dynamic state is simulated.
Preferably, the shafting displacement measuring device comprises a gear ring and a displacement sensor, the gear ring is arranged on the short shaft for test, and the displacement sensor is used for measuring the rotary displacement of the gear ring and transmitting a displacement signal to the control device.
Preferably, the actual inertia of the inertia disc comprises the real ship shafting inertia and the inertia converted from the dynamic friction resistance.
Preferably, the test stub shaft is connected to the propulsion unit via a clutch.
The invention also provides a land simulation test method for starting the shafting of the ship propulsion system, which is characterized in that the land simulation platform for the starting process of the shafting of the ship propulsion system, which is applied to any one of the above, comprises the following steps:
step one, mounting a bearing on a short shaft for test;
connecting one end of a short shaft for test with an inertia disc, and simulating the dynamic friction moment and the inertia moment of the shaft system in the process of converting the real ship shaft system from static state to dynamic state;
step three, installing a shafting brake device on a short shaft for testing, and simulating the shafting static friction moment in the process of converting the real ship shafting from static state to dynamic state;
fourthly, mounting a shafting displacement measuring device on the short shaft for test, detecting the shafting displacement of the short shaft for test and transmitting a displacement signal to the control device;
step five, debugging and calibrating the shafting brake device;
debugging and calibrating the shafting displacement measuring device and the control device;
and step seven, connecting the other end of the short shaft for the test with the propulsion unit, starting the propulsion unit, and observing whether the propulsion unit can be started successfully.
Preferably, in the fifth step, the pressure of the hydraulic station is adjusted, and the braking torque of the shafting braking device is set to be equal to the shafting static friction torque in the process of converting the shafting of the real ship from the static state to the dynamic state.
Preferably, in the sixth step, whether the shafting brake device can be controlled by the control device to timely release the brake is checked through the mode of the disc shaft when the test short shaft generates shafting displacement.
Preferably, in the seventh step, the rotating speed of the propulsion unit is set to the row connecting rotating speed, then the propulsion unit is connected with the test short shaft through the clutch, and whether the propulsion unit can be successfully connected or not is observed.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a simulation platform and a test method for simulating the starting process of a real ship propulsion system in a land test, which can simulate the starting process of a real ship shafting in the land test, can simulate the change of a resisting moment in the process of converting the real ship shafting from static state to dynamic state, can accurately simulate the starting process of the real ship propulsion system on land at lower cost, master the starting characteristic of the propulsion system and effectively release the ship loading risk of the propulsion system.
Drawings
FIG. 1 is a schematic diagram of a land simulation platform for a ship propulsion system shafting start-up process according to the present invention;
wherein, 1-propulsion unit; 2-a clutch; 3-a reduction gearbox; 4, bearing one; 5, bearing II; 6-a hydraulic station; 7-a brake; 8-a brake disc; 9-a gear ring; 10-a displacement sensor; 11-inertia disc; 12-a control device; 13-minor axis for testing.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
As shown in figure 1, the land simulation platform for the ship propulsion system shafting starting process comprises a short shaft 13 for test, a bearing I4, a bearing II 5, a shafting brake device, an inertia disc 11, a shafting displacement measuring device and a control device 12. One end of a short shaft for test 13 is directly connected with the propulsion unit 1 or connected with the propulsion unit through a clutch 2, the other end of the short shaft for test is connected with an inertia disc 11, a shafting brake device and a shafting displacement measuring device are installed on the short shaft for test, and the short shaft for test is supported by a bearing I4 and a bearing II 5. A shafting brake device is used for simulating the static friction moment of a real ship shafting, an inertia resistance moment and the dynamic friction resistance of the real ship are simulated by an inertia disc 11, a shafting displacement measuring device is used for monitoring the shafting displacement of a short shaft 13 for testing, and a control device 12 controls the brake to be loosened by the shafting displacement to simulate the change of the resistance moment in the process of converting the static state of the real ship shafting into the dynamic state.
The embodiment is a first-engine row-connecting test of a propulsion system with two diesel engines in parallel. The propulsion system is characterized in that two diesel engines drive a shaft system and a propeller through a parallel reduction gear box 3, and the propulsion system is started by connecting one diesel engine with a clutch 2 to drive the shaft system.
In this embodiment, any one propulsion unit 1 and clutch 2 are connected and arranged to drive shafting and propeller, and during the land test, the static friction resistance moment when the real ship shafting starts is simulated by the brake device, and the brake device is a hydraulic brake device, and includes hydraulic pressure station 6, stopper 7 and brake disc 8, and brake disc 8 installs on experimental stub axle 13, and hydraulic pressure station 6 is connected with brake disc 8 through stopper 7. The rated braking torque of the shafting braking device is larger than the shafting static friction resistance torque to be simulated, the braking device can display the current braking torque, and the braking torque is set according to the requirement. The hydraulic station 6 should be capable of being instantly relieved of pressure after receiving a command from the control device 12, so as to rapidly release the brake and simulate the instant process of the real ship shafting changing from static state to dynamic state.
The dynamic friction resistance moment and the inertia resistance moment when the real ship shafting is started are simulated by the inertia disk 11, so the actual inertia of the inertia disk 11 comprises the real ship shafting inertia and the inertia converted from the dynamic friction resistance.
Conversion process of static friction resistance moment to dynamic friction resistance moment + inertia resistance moment among the real ship shafting start-up process is realized through shafting displacement measurement device and controlling means 12, shafting displacement measurement device includes ring gear 9 and displacement sensor 10, ring gear 9 is installed on experimental minor axis 13 of using, when experimental minor axis 13 drives ring gear 9 and rotates, displacement sensor 10 should be able to pass through ring gear 9 accurate detection experimental minor axis 13 shafting displacement of using, when detecting the shafting and starting to rotate by static, should be able to send signal to controlling means 12.
The control device 12 should be able to control the shafting brake device to release the brake after receiving the signal sent by the shafting displacement measuring device.
The invention also provides a land simulation test method for the starting process of the ship propulsion system shafting, which comprises the following steps:
step one, sleeving a bearing I4 and a bearing II 5 on a short shaft 13 for testing, distributing the bearings at two ends of the short shaft 13 for testing, and installing and connecting the bearings in place;
step two, installing an inertia disc 11 at one end of a short shaft 13 for test, and connecting the other end of the short shaft with a clutch 2 through a reduction gear box 3;
step three, mounting a brake disc 8 on a short shaft 13 for test, and connecting the brake disc with a hydraulic station 6 through a brake 7;
step four, sleeving the gear ring 9 on the short shaft 13 for testing, and installing a displacement sensor 10 at a corresponding position;
step five, debugging the brake device consisting of the brake device hydraulic station 6, the brake 7 and the brake disc 8: the brake 7 and the brake disc 8 are clamped by adjusting the hydraulic station 6, and the braking torque of the shafting braking device is set to be equal to the shafting static friction torque in the process of converting the real ship shafting from static state to dynamic state by adjusting the pressure of the hydraulic station 6.
Step six, debugging a shafting displacement measuring device consisting of a gear ring 9 and a sensor 10 and a control device 12, and checking whether the control device 12 can control a brake device hydraulic station 6 to release the brake in time when the shafting displacement occurs in the shafting through a disc shaft mode;
and step seven, starting the propulsion unit 1, adjusting the rotating speed of the propulsion unit 1 to the connecting and discharging rotating speed, controlling the clutch 2 to connect and discharge, and observing whether the propulsion unit 1 can be successfully connected and discharged.
If the output torque of the propulsion unit 1 can overcome the braking torque of a brake device (namely the static friction torque of a real ship), at the moment, the short shaft 13 for the test displaces, the displacement sensor 10 sends out a signal, the control device 12 controls the hydraulic station 6 to quickly release pressure, the brake device releases the brake, the shafting realizes the conversion from static state to dynamic state, at the moment, the inertia disc 11 simulates the dynamic friction torque and the inertia resistance torque of the real ship, and the propulsion unit 1 reaches the specified rotating speed.
Repeating the steps for 3 times, and if the steps can be successfully completed, the actual ship propulsion system is successfully started.
If the clutch 2 is not provided between the propulsion unit and the test stub shaft 13, but a fixed connection is used, it is directly observed whether the propulsion unit 1 can be successfully started.
And if the row connection fails or the propulsion unit 1 stops in the seventh step, the starting failure of the propulsion system of the real ship is indicated.
Claims (10)
1. A ship propulsion system shafting start-up process land simulation platform which characterized in that: the device comprises a short shaft (13) for test, a bearing, a shafting brake device, an inertia disc (11), a shafting displacement measuring device and a control device (12);
the test short shaft (13) is supported by a bearing, one end of the test short shaft (13) is connected with the propulsion unit (1) and driven by the propulsion unit (1) to rotate, the other end of the test short shaft is connected with the inertia disc (11), and the inertia disc (11) is used for simulating the dynamic friction moment and the inertia moment of the shaft system in the process of converting the real ship shaft system from the static state to the dynamic state;
the shafting brake device and the shafting displacement measuring device are arranged on the short shaft (13) for test, and the shafting brake device is used for simulating shafting static friction moment in the process of converting a real ship shafting from static state to dynamic state; the shafting displacement measuring device is used for detecting shafting displacement of the short shaft (13) for the test and transmitting a displacement signal to the control device (12), and the control device (12) controls the shafting brake device to release the brake by monitoring the shafting displacement so as to simulate the change of the resisting moment of the real ship shafting in the process of converting from static state to dynamic state.
2. The land simulation platform for the starting process of the ship propulsion system shafting as claimed in claim 1, wherein: the rated braking torque of the shafting braking device is larger than the shafting static friction torque to be simulated, and the shafting braking device can set the braking torque as required.
3. The land simulation platform for the starting process of the ship propulsion system shafting as claimed in claim 1, wherein: the shafting brake device is hydraulic pressure shafting brake device, including hydraulic pressure station (6), brake disc (8) and stopper (7), hydraulic pressure station (6) are through stopper (7) connection brake disc (8), brake disc (8) are established on experimental stub axle (13) of using, hydraulic pressure station (6) are in the twinkling of an eye the pressure release after receiving controlling means's (12) instruction to loosen the brake rapidly, simulate real ship shafting and turn into dynamic transient process by static.
4. The land simulation platform for the starting process of the ship propulsion system shafting as claimed in claim 1, wherein: the shafting displacement measuring device comprises a gear ring (9) and a displacement sensor (10), the gear ring (9) is arranged on a short shaft (13) for test, and the displacement sensor (10) is used for measuring the rotary displacement of the gear ring (9) and transmitting a displacement signal to the control device (12).
5. The land simulation platform for the starting process of the ship propulsion system shafting as claimed in claim 1, wherein: the actual inertia of the inertia disc (11) comprises the real ship shafting inertia and the inertia converted from the dynamic friction resistance.
6. The land simulation platform for the starting process of the ship propulsion system shafting as claimed in claim 1, wherein: the test short shaft (13) is connected with the propulsion unit (1) through the clutch (2).
7. A land simulation test method for starting ship propulsion system shafting, which is characterized in that the land simulation platform for the ship propulsion system shafting starting process according to any one of claims 1 to 6 is applied, and comprises the following steps:
step one, mounting a bearing on a short shaft for test;
connecting one end of a short shaft for test with an inertia disc, and simulating the dynamic friction moment and the inertia moment of the shaft system in the process of converting the real ship shaft system from static state to dynamic state;
step three, installing a shafting brake device on a short shaft for testing, and simulating the shafting static friction moment in the process of converting the real ship shafting from static state to dynamic state;
fourthly, mounting a shafting displacement measuring device on the short shaft for test, detecting the shafting displacement of the short shaft for test and transmitting a displacement signal to the control device;
step five, debugging and calibrating the shafting brake device;
debugging and calibrating the shafting displacement measuring device and the control device;
and step seven, connecting the other end of the short shaft for the test with the propulsion unit, starting the propulsion unit, and observing whether the propulsion unit can be started successfully.
8. The ship propulsion system shafting start-up land simulation test method of claim 7, wherein: and fifthly, setting the braking torque of the shafting braking device to be equal to the shafting static friction torque in the process of converting the real ship shafting from static state to dynamic state by adjusting the pressure of the hydraulic station.
9. The ship propulsion system shafting start-up land simulation test method of claim 7, wherein: and step six, checking whether the control device can control the shafting brake device to timely release the brake when the test short shaft generates shafting displacement in a shaft coiling mode.
10. The ship propulsion system shafting start-up land simulation test method of claim 7, wherein: and step seven, setting the rotating speed of the propelling unit to the connecting and discharging rotating speed, then connecting the propelling unit with the test short shaft through the clutch, and observing whether the propelling unit can be successfully connected and discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011143887.1A CN112407180A (en) | 2020-10-23 | 2020-10-23 | Land simulation platform and test method for ship propulsion system shafting starting process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011143887.1A CN112407180A (en) | 2020-10-23 | 2020-10-23 | Land simulation platform and test method for ship propulsion system shafting starting process |
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| CN112407180A true CN112407180A (en) | 2021-02-26 |
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| CN202011143887.1A Pending CN112407180A (en) | 2020-10-23 | 2020-10-23 | Land simulation platform and test method for ship propulsion system shafting starting process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767632A (en) * | 2008-12-30 | 2010-07-07 | 中国船舶重工集团公司第七一一研究所 | Test platform for ship propulsion system |
| CN103345158A (en) * | 2013-06-27 | 2013-10-09 | 中国重型机械研究院股份公司 | Ventilating disc type brake test stand and electric inertia simulating control method thereof |
| US8798825B1 (en) * | 2012-07-06 | 2014-08-05 | Richard L. Hartman | Wakeboat hull control systems and methods |
| CN104276258A (en) * | 2014-07-31 | 2015-01-14 | 中国船舶重工集团公司第七一一研究所 | System and method for simulating starting process states of propeller and shaft system |
| CN108593307A (en) * | 2017-12-29 | 2018-09-28 | 山东国晶新材料有限公司 | One kind 1:1 simulation operating mode inertia experimental stand and experimental method |
-
2020
- 2020-10-23 CN CN202011143887.1A patent/CN112407180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767632A (en) * | 2008-12-30 | 2010-07-07 | 中国船舶重工集团公司第七一一研究所 | Test platform for ship propulsion system |
| US8798825B1 (en) * | 2012-07-06 | 2014-08-05 | Richard L. Hartman | Wakeboat hull control systems and methods |
| CN103345158A (en) * | 2013-06-27 | 2013-10-09 | 中国重型机械研究院股份公司 | Ventilating disc type brake test stand and electric inertia simulating control method thereof |
| CN104276258A (en) * | 2014-07-31 | 2015-01-14 | 中国船舶重工集团公司第七一一研究所 | System and method for simulating starting process states of propeller and shaft system |
| CN108593307A (en) * | 2017-12-29 | 2018-09-28 | 山东国晶新材料有限公司 | One kind 1:1 simulation operating mode inertia experimental stand and experimental method |
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Application publication date: 20210226 |
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