CN110320005A - A kind of submarine navigation device electric power propulsion system Performance Match test method - Google Patents
A kind of submarine navigation device electric power propulsion system Performance Match test method Download PDFInfo
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- CN110320005A CN110320005A CN201910553375.3A CN201910553375A CN110320005A CN 110320005 A CN110320005 A CN 110320005A CN 201910553375 A CN201910553375 A CN 201910553375A CN 110320005 A CN110320005 A CN 110320005A
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- navigation device
- submarine navigation
- electric machine
- propulsion
- electric power
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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
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- Tests Of Electric Status Of Batteries (AREA)
Abstract
The present invention provides a kind of submarine navigation device electric power propulsion system Performance Match test methods, under water by submarine navigation device battery pack, submarine navigation device propulsion electric machine and the submergence of submarine navigation device propelling screws after connection；Do not start submarine navigation device battery pack, so that propulsion electric machine is reached setting speed using trailer；When trailer freely slows down, parameters are read；Start submarine navigation device battery pack, submarine navigation device propulsion electric machine is made to be maintained at rated speed；In the case where guaranteeing that submarine navigation device propulsion electric machine revolving speed is constant, change the speed of trailer, repeated observation trailer is in the parameters when uniform motion stage；The efficiency of the thrust of underwater electric power propulsion system and the relation curve of towed speed, the bitt characteristic of propelling screws and electric power propulsion system is calculated.The present invention considers influencing each other between each subsystem, reduces experiment flow, reduces experimental cost.
Description
Technical field
The invention belongs to submarine navigation device technical fields, are related to a kind of electric power propulsion system performance test methods.
Background technique
Submarine navigation device has become the important equipment in the fields such as hydrospace detection, sea floor exploration and submarine fishing, has and lives
Dynamic the advantages that range is wide, mobility is good, intelligence degree is high, diving depth is deep, becomes and complete the important of various subsea tasks
Tool all has wide application prospect in military field and civil field and is concerned.Electric power propulsion system is water
The core system of lower aircraft, the overall performance of electric power propulsion system determine the overall performance of submarine navigation device substantially.It is dynamic
Power energy resource system carries out long time continuous working for submarine navigation device and oceangoing voyage journey executes task and has conclusive effect, leads to
Often battery-mounted group of capacity just determines the time and basic voyage that aircraft is detained under water.Propulsion system can limit navigation
The task parameters of device so that limit the movenent performance of entire aircraft, such as speed, maneuverability to a certain extent.Power source system
System is regarded as the electric power propulsion system an of entirety with propulsion system to carry out the assessment of comprehensive performance test.
From the point of view of existing submarine navigation device electric power propulsion system test at present, the proposition of system detection method is also deposited
In deficiency.Patent relevant with propulsion system to submarine navigation device power has: 1) 2015 year, Jiangsu University of Science and Technology Song Zhenwen et al.
It has invented a kind of underwater robot power propulsion system and design method, Publication No. CN106768655A is primarily upon
It is detected and the propeller for the field robot that removes contamination layout and design applied to submerged structure；2) 2016, Shanxi Fenxi heavy industry was public
Si Shiyong bolt et al. has invented a kind of aircraft and has promoted section dynamic sealing test device and its test method, Publication No.
CN106768655A has been primarily upon the dynamic sealing performance that aircraft promotes section；3) 2017, China Shipbuilding Industry Corporation
Zhang Ming et al. has invented the reliability laboratory test macro and method of a kind of UUV propulsion electric machine, Publication No.
CN108254686A has been primarily upon the reliability of motor overall operation；4) 2017, the Zhou Maoqun etc. of Shengli Oil Field company
A kind of high-power submersible machine mechanical seal test device is illustrated in human hair, and Publication No. CN206876350U is primarily upon
The sealing performance of motor；5) 2018, Chinese Academy of Sciences Chen Yang et al. invented a kind of control of Multifunctional AC motor and test
Device, Publication No. CN109141539A have been primarily upon the control performance of submersible machine.
Above-mentioned patent be primarily upon the layout of submarine navigation device propeller, promote the dynamic sealing of section, propulsion electric machine it is dynamic
The problems such as sealing and the control of propulsion electric machine, however be to solve some subsystem in submarine navigation device electric power propulsion system
Relevant issues in performance test or some subsystem are not concerned with the matching of aircraft electric power propulsion system overall performance
Test.When only individually some subsystem of test submarine navigation device electric power propulsion system, on the one hand need to do many repetitions
The experiment, such as propulsion electric machine performance test, propelling screws performance test etc. of property, improve experimental cost；On the other hand,
Subsystem individually tests test with can there are problems that systematic entirety energy matching, such as carries out performance survey to propulsion electric machine
Examination, and can not closing to reality situation completely, propulsion electric machine ideal operating condition can only be tested, the actual performance of propulsion electric machine
It can be restricted by battery pack and propelling screws performance.It would therefore be highly desirable to solve the problems, such as: 1) submarine navigation device electric power promotes
The it is proposed of systematic entirety energy matching test method；2) cumbersome experiment flow is reduced, experimental cost is reduced；3) experiment to the greatest extent may be used
Influencing each other between each subsystem can be considered close to the actual use situation of submarine navigation device electric power propulsion system.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of submarine navigation device electric power propulsion system Performance Match
Property test method, has been related to each main composition subsystem of submarine navigation device electric power propulsion system, comprising: 1) underwater navigation
Device battery pack；2) submarine navigation device propulsion electric machine；3) submarine navigation device propelling screws.During actual test, it is only necessary to
Towing basin experiment is carried out to submarine navigation device integral electric power propulsion system, so that it may system performance parameter is obtained, and not only
It is only the performance parameter of some subsystem.
The technical solution adopted by the present invention to solve the technical problems be the following steps are included:
(1) submarine navigation device battery pack, submarine navigation device propulsion electric machine and the submarine navigation device after connection are promoted into spiral
Paddle submerges under water；
(2) do not start submarine navigation device battery pack, so that propulsion electric machine is reached setting speed using trailer；When trailer freely subtracts
When fast, the back emf waveform and revolving speed of propulsion electric machine are read, under the conditions of completing electric power propulsion system non-transformer power output,
Counter electromotive force test of the propulsion electric machine under corresponding revolving speed；
(3) start submarine navigation device battery pack, submarine navigation device propulsion electric machine is made to be maintained at rated speed；Start trailer,
When observation trailer is in the uniform motion stage, the voltage and current output characteristics and flash-over characteristic of submarine navigation device battery pack are read
Current Voltage input characteristics, output torque and the output revolving speed of propulsion electric machine, read the thrust and torque of propelling screws, read
The temperature change of submarine navigation device battery pack, submarine navigation device propulsion electric machine；
(4) in the case where guaranteeing that submarine navigation device propulsion electric machine revolving speed is constant, change the speed of trailer, repeat step
(3) several times；
(5) thrust of underwater electric power propulsion system and the relation curve of towed speed, propelling screws is calculated
The efficiency of bitt characteristic and electric power propulsion system.
Temperature sensor is installed in the submarine navigation device battery pack；The submarine navigation device battery pack with it is described
The flash-over characteristic acquisition device and Current Voltage of electronic load and the end PC composition are installed between submarine navigation device propulsion electric machine
Sensor；After the submarine navigation device battery pack passes through the sensor, then push away through stable-pressure device and the submarine navigation device
It is connected into motor；Current Voltage sensor is also installed between the stable-pressure device and submarine navigation device propulsion electric machine；The water
Temperature sensor is installed on lower aircraft propulsion electric machine；The submarine navigation device propulsion electric machine passes through thrust torques revolution speed sensing
Device connects propelling screws.
The propelling screws and thrust torques speed probe are wrapped up by streamlined spacious water tank；Propelling screws main shaft
Center line be submerged in the depth under water surface be greater than a propelling screws diameter；The blade back of propeller is installed forward.
The beneficial effects of the present invention are:
(1) it proposes submarine navigation device electric power propulsion system overall performance matching test method, can be avoided to independent
Subsystem carries out the test of multiplicating property, reduces experiment flow, reduces experimental cost；
(2) submarine navigation device electric power propulsion system overall performance matching test method makes experiment as far as possible close to underwater
The actual use situation of aircraft electric power propulsion system, it is contemplated that influencing each other between each subsystem.
Detailed description of the invention
Fig. 1 is method schematic of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, and the present invention includes but are not limited to following implementations
Example.
The present invention proposes a kind of submarine navigation device electric power propulsion system Performance Match test method.Entire underwater navigation
Each composition subsystem of device electric power propulsion system all has corresponding assessment performance and test method.
To achieve the above object, the contents of the present invention include as follows.
The instrument and equipment that the submarine navigation device electric power propulsion system Performance Match test includes has: submarine navigation device
Battery pack, submarine navigation device propulsion electric machine, submarine navigation device propelling screws, Current Voltage sensor, temperature sensor, pressure stabilizing
Device, electronic load, the end PC, data acquisition device, thrust torques speed probe and streamlined spacious water tank.
The connection relationship of the experimental facilities are as follows: the submarine navigation device battery pack is equipped with temperature sensor；The water
Electronic load, data acquisition device and the end PC composition are installed between lower aircraft battery pack and the submarine navigation device propulsion electric machine
Flash-over characteristic acquisition device and Current Voltage sensor；After the submarine navigation device battery pack passes through the sensor, then
It is connect through stable-pressure device with the submarine navigation device propulsion electric machine；Between the stable-pressure device and submarine navigation device propulsion electric machine
Current Voltage sensor is installed；The submarine navigation device propulsion electric machine is equipped with temperature sensor, with the thrust torques
Speed probe connection；The thrust torques speed probe other end is connect with propelling screws；The streamlined spacious water tank
Package propulsion electric machine, thrust torques speed probe and the propelling screws.
The experiment condition is the experiment of normal towing basin.
Submarine navigation device electric power propulsion system Performance Match test method provided by the invention, the specific steps are that:
(1) experimental facilities is installed by above-mentioned experimental facilities connection relationship.It should be noted entire propulsion spiral in equipment installation
Paddle and thrust torques speed probe need to be wrapped up by a streamlined spacious water tank.The center line of propelling screws model main shaft is answered
It is submerged under water surface at greater than the diameter of a propelling screws model.The blade back of propeller is installed forward.
(2) towing experiment for the first time, starts trailer, propulsion electric machine is made to reach certain revolving speed.When trailer freely slows down, from
Current Voltage sensor reads the back emf waveform of propulsion electric machine, reads turning for propulsion electric machine from thrust torques speed probe
Speed.Under the conditions of the main completion electric power propulsion system non-transformer power output of this time experiment, propulsion electric machine is under corresponding revolving speed
Counter electromotive force test；
(3) second of towing trial start submarine navigation device electric power propulsion system, its propulsion electric machine are made to be maintained at specified
Revolving speed starts trailer afterwards.When observation trailer is in the uniform motion stage, exported by the voltage and current that sensor reads battery pack
Characteristic and flash-over characteristic, read the Current Voltage input characteristics, output torque and output revolving speed of propulsion electric machine, and read and promote
The thrust and torque of propeller.Meanwhile the temperature change of battery pack and propulsion electric machine in test is read by temperature sensor.
(4) change the speed of trailer in towing trial, repetitive process (3).15 kinds of working conditions are typically at least needed, repeatedly
During test, the revolving speed of the speed conditions such as propulsion electric machine need to meet, i.e. propulsion electric machine in guarantee process (3) is identical.
(5) calculated result is handled.By above-mentioned a series of experiments, while obtaining electric power propulsion system overall operation condition
Under each subsystem performance parameter, including current-voltage characteristic, flash-over characteristic, temperature characterisitic, torque characteristics etc..Finally may be used also
Be calculated the bitt characteristic of the thrust of underwater electric power propulsion system and the relation curve of towed speed, propelling screws with
And the efficiency of electric power propulsion system.
As shown in Figure 1, the embodiment of the present invention includes the following contents:
(1) experimental facilities is installed.The instrument and equipment being related to includes: submarine navigation device battery pack 1, submarine navigation device propulsion electricity
Machine 2, submarine navigation device propelling screws 3, Current Voltage sensor 1-1 and 2-1, temperature sensor 1-2 and 2-2, stable-pressure device
1-3, electronic load 1-4, PC end 1-6, data acquisition device 1-5, thrust torques speed probe 2-3, streamlined spacious water tank 3-1.
Submarine navigation device battery pack 1 is equipped with temperature sensor 1-2；Submarine navigation device battery pack 1 and the submarine navigation device promote electricity
The flash-over characteristic acquisition device and electric current of electronic load 1-4, data acquisition device 1-5 and PC end 1-6 composition are installed between machine 2
Voltage sensor 1-1；After submarine navigation device battery pack 1 passes through the sensor, then pushed away with submarine navigation device through stable-pressure device 1-3
It is connected into motor 2；Current Voltage sensor 2-1 is also installed between stable-pressure device 1-3 and submarine navigation device propulsion electric machine 2；Water
Lower aircraft propulsion electric machine 2 is equipped with temperature sensor 2-2, connect with the thrust torques speed probe 2-3；Thrust is turned round
The other end of square speed probe 2-3 is connect with propelling screws 3；Streamlined spacious water tank 3-1 package submarine navigation device promotes electricity
Machine 2, temperature sensor 2-2,2-3 and submarine navigation device propelling screws 3.It should be noted propelling screws model 3 in equipment installation
The center line of main shaft should be submerged under water surface at greater than the diameter of a propelling screws model.The blade back of propeller is pacified forward
Dress.
(2) towing experiment for the first time, starts trailer, submarine navigation device propulsion electric machine 2 is made to reach certain revolving speed.When trailer from
When by slowing down, the back emf waveform of propulsion electric machine is read from 2-1, and the revolving speed of propulsion electric machine is read from 2-3.This time experiment is main
Under the conditions of completing electric power propulsion system non-transformer power output, counter electromotive force test of the propulsion electric machine 2 under corresponding revolving speed；
(3) second of towing trial start submarine navigation device electric power propulsion system, its propulsion electric machine 2 are made to be maintained at volume
Determine revolving speed, starts trailer afterwards.When observation trailer is in the uniform motion stage, pass through temperature sensor 1-2 and 2-2, stable-pressure device
1-3 reads voltage and current output characteristics, temperature characterisitic and the flash-over characteristic of battery pack, is read by Current Voltage sensor 2-1
The Current Voltage input characteristics of propulsion electric machine, by thrust torques speed probe 2-3 read output torque and output revolving speed with
And the thrust of propelling screws 3 is read, the temperature change of propulsion electric machine 2 is acquired by temperature sensor 2-2.
(4) change the speed of trailer in towing trial, repetitive process (3).15 kinds of working conditions are typically at least needed, repeatedly
During test, the revolving speed of the speed conditions such as propulsion electric machine 2 need to meet, i.e. propulsion electric machine 2 in guarantee process (3) is identical.
(5) calculated result is handled.By above-mentioned a series of experiments, while obtaining electric power propulsion system overall operation condition
Under each subsystem performance parameter, including current-voltage characteristic, flash-over characteristic, temperature characterisitic, torque characteristics etc..Finally may be used also
Be calculated the bitt characteristic of the thrust of underwater electric power propulsion system and the relation curve of towed speed, propelling screws with
And the efficiency of electric power propulsion system.
The embodiment describes a kind of submarine navigation device electric power propulsion system Performance Match test method, this method letter
It is single easy, reduce the reperformance test that individually test each subsystem bring of electric power propulsion system is cumbersome, reduces test
Cost.And this method considers influencing each other between each subsystem, implementation process is in that entire submarine navigation device is electronic to be pushed
Into working state of system, real use state more close to submarine navigation device electric power propulsion system, therefore obtained performance
Parameter is more reasonable.
Claims (3)
1. a kind of submarine navigation device electric power propulsion system Performance Match test method, it is characterised in that the following steps are included:
(1) submarine navigation device battery pack, submarine navigation device propulsion electric machine and the submarine navigation device propelling screws after connection are soaked
Not under water；
(2) do not start submarine navigation device battery pack, so that propulsion electric machine is reached setting speed using trailer；When trailer freely slows down
When, the back emf waveform and revolving speed of propulsion electric machine are read, under the conditions of completing electric power propulsion system non-transformer power output, is pushed away
Into counter electromotive force test of the motor under corresponding revolving speed；
(3) start submarine navigation device battery pack, submarine navigation device propulsion electric machine is made to be maintained at rated speed；Start trailer, observation
When trailer is in the uniform motion stage, the voltage and current output characteristics and flash-over characteristic of submarine navigation device battery pack read and promote
Current Voltage input characteristics, output torque and the output revolving speed of motor, read the thrust and torque of propelling screws, read underwater
The temperature change of aircraft battery pack, submarine navigation device propulsion electric machine；
(4) in the case where guaranteeing that submarine navigation device propulsion electric machine revolving speed is constant, change the speed of trailer, repeat step (3) if
Dry time；
(5) bitt of the thrust of underwater electric power propulsion system and the relation curve of towed speed, propelling screws is calculated
The efficiency of characteristic and electric power propulsion system.
2. submarine navigation device electric power propulsion system Performance Match test method according to claim 1, feature exist
In: temperature sensor is installed in the submarine navigation device battery pack；The submarine navigation device battery pack and described underwater
The flash-over characteristic acquisition device and Current Voltage sensing of electronic load and the end PC composition are installed between aircraft propulsion electric machine
Device；After the submarine navigation device battery pack passes through the sensor, then through stable-pressure device and submarine navigation device propulsion electricity
Machine connection；Current Voltage sensor is also installed between the stable-pressure device and submarine navigation device propulsion electric machine；The underwater boat
Temperature sensor is installed on row device propulsion electric machine；The submarine navigation device propulsion electric machine is connected by thrust torques speed probe
Connect propelling screws.
3. submarine navigation device electric power propulsion system Performance Match test method according to claim 1, feature exist
In: the propelling screws and thrust torques speed probe are wrapped up by streamlined spacious water tank；In propelling screws main shaft
Heart line is submerged in the diameter that the depth under water surface is greater than a propelling screws；The blade back of propeller is installed forward.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201974295U (en) * | 2011-02-15 | 2011-09-14 | 上海海事大学 | Electrically-propelled testing platform |
| CN103913291A (en) * | 2014-04-04 | 2014-07-09 | 郭春雨 | Pod propelling system testing device |
| CN206208490U (en) * | 2016-11-04 | 2017-05-31 | 中国航天空气动力技术研究院 | A kind of near space propeller ground experiment test system |
| CN106813891A (en) * | 2016-11-04 | 2017-06-09 | 中国航天空气动力技术研究院 | Air propeller electric propulsion system dynamic response characteristic test method |
| CN207231553U (en) * | 2017-10-20 | 2018-04-13 | 成都云鼎智控科技有限公司 | A kind of easily propeller motor power performance testing device |
| CN108254686A (en) * | 2017-12-27 | 2018-07-06 | 中国船舶重工集团公司第七0研究所 | A kind of UUV propulsion electric machines reliability laboratory tests system and method |
| CN108313198A (en) * | 2017-12-13 | 2018-07-24 | 中国特种飞行器研究所 | A kind of submarine navigation device model opens water from air power instrument |
| CN109556878A (en) * | 2018-12-21 | 2019-04-02 | 沈阳航空航天大学 | A kind of electric propeller system aeroperformance and efficiency synchronous measuring apparatus and method |
-
2019
- 2019-06-25 CN CN201910553375.3A patent/CN110320005A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201974295U (en) * | 2011-02-15 | 2011-09-14 | 上海海事大学 | Electrically-propelled testing platform |
| CN103913291A (en) * | 2014-04-04 | 2014-07-09 | 郭春雨 | Pod propelling system testing device |
| CN206208490U (en) * | 2016-11-04 | 2017-05-31 | 中国航天空气动力技术研究院 | A kind of near space propeller ground experiment test system |
| CN106813891A (en) * | 2016-11-04 | 2017-06-09 | 中国航天空气动力技术研究院 | Air propeller electric propulsion system dynamic response characteristic test method |
| CN207231553U (en) * | 2017-10-20 | 2018-04-13 | 成都云鼎智控科技有限公司 | A kind of easily propeller motor power performance testing device |
| CN108313198A (en) * | 2017-12-13 | 2018-07-24 | 中国特种飞行器研究所 | A kind of submarine navigation device model opens water from air power instrument |
| CN108254686A (en) * | 2017-12-27 | 2018-07-06 | 中国船舶重工集团公司第七0研究所 | A kind of UUV propulsion electric machines reliability laboratory tests system and method |
| CN109556878A (en) * | 2018-12-21 | 2019-04-02 | 沈阳航空航天大学 | A kind of electric propeller system aeroperformance and efficiency synchronous measuring apparatus and method |
Non-Patent Citations (2)
| Title |
|---|
| 何漫丽: "水下自航行器水动力学特性数值计算与试验研究", 《中国优秀博硕士学位论文全文数据库 (博士) 工程科技Ⅱ辑》 * |
| 张鑫 等: "飞行器螺旋桨电推进动力测试系统设计研究", 《微电机》 * |
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Application publication date: 20191011 |