CN108489706B - Boat tractor hull model running resistance detects experimental rig and its method - Google Patents
Boat tractor hull model running resistance detects experimental rig and its method Download PDFInfo
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- CN108489706B CN108489706B CN201810306852.1A CN201810306852A CN108489706B CN 108489706 B CN108489706 B CN 108489706B CN 201810306852 A CN201810306852 A CN 201810306852A CN 108489706 B CN108489706 B CN 108489706B
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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 discloses a kind of boat tractor hull model running resistance detection experimental rig and its methods, the device includes paddy field soil box, traction device, data acquisition device, hull model, traction device is set to paddy field soil box one end, hull model group is formed by the hull model of different groundings and different curvature radius series, by changing soil types in the soil box of paddy field, saturated soil water content, the surface layer depth of water and time of repose obtain each middle operating condition in paddy field, it can be to different structure hull model in different grounding pressures, resistance detection is carried out under hauling speed and paddy field environmental condition, to obtain the walking resistance of different types boat tractor, apparatus structure is compact, hauling speed is stepless adjustable and with pulling force synchronous recording, meet the requirement that various types ship type tractor moving resistance measurement is wanted, it can also be used for paddy field environment item The measurement that part, Ship Structure parameter influence running resistance.
Description
Technical field
The invention belongs to agricultural mechanical fields, are related to a kind of examination that boat tractor is detected in different operating condition downward driving resistances
Experiment device.
Background technique
Paddy field is the chief component of cultivated land, but since last century reclaims land from a lake, throughout the year soaked conventional tillage is accustomed to
And land intensification transformation, equipment power is increasing, causes that " mud foot is deeper, and-power is bigger-ploughs bottom destruction-mud foot more
It is deep " vicious circle, cause some areas paddy field mud foot (depth >=40cm) deeper and deeper, traditional work tool can not go to the field work
Industry, tractor-ploughing boat-type tractor produce dynamic power machine under background.But due to paddy field earth structure composition multiplicity, operating condition difference
Greatly, existing tractor-ploughing boat-type tractor vessel designs are that fluid media (medium) is designed, and is in the power of the paddy field soil of liquid
The rheological behavior for learning characteristic and water is completely different, and the different Ship Structure of tractor-ploughing boat-type tractor hull is aqueous in paddy field soil
Running resistance very different when clay content, surface layer depth of water difference in amount, soil.But current soil slot test stand is for nonirrigated farmland
The testing stand of work tool cannot simulate paddy field environment, can not hull to not structure in different paddy field conditions
Under tested.Due to Ship Structure parameter choose it is unreasonable cause that tractor-ploughing boat-type tractor running resistance is big, energy consumption is high, especially
Need it is a kind of when can accurately determine different paddy fields one determine Ship Structure tractor-ploughing boat-type tractor running resistance measurement
Experimental rig, with Optimized Matching dynamical system, while the main structure parameters of assay optimization hull such as leading edge radius of curvature, ground connection
Angle, ground pressure.
Summary of the invention
The purpose of the present invention overcomes traditional soil slot test stand to be only used for the test of dryland soil work tool transaction capabilities, cannot
Simulate complicated paddy field soil operating condition, it is impossible to be used in different structure tractor-ploughing boat-type tractor hull moving resistance measurement, this
Invention provides a kind of boat tractor hull model running resistance detection experimental rig and its method, by inserting in paddy field soil box
The soil of test request type and pre-processed, water-filling is to simulate the paddy-field-workings conditions such as different moisture content, the surface layer depth of water, benefit
Its running resistance is measured under the conditions of difference is in hauling speed, ground pressure with different structure hull model, is boat tractor
Structure design, advance resistance measurement provide experiment detection device.
The technical scheme adopted by the invention to solve the technical problem is that:
Boat tractor hull model running resistance detects experimental rig comprising paddy field soil box, traction device, data are adopted
Acquisition means, hull model, traction device are placed in paddy field soil box one end, and hull model is placed in the soil box of paddy field, data acquisition dress
It sets and is fixed on hull model；
Paddy field soil box includes tank, pedestal, tapping pipe, ball valve, vertical bottom beam, contour detection pipe, sebific duct, inside groove, more fork groups
Seat is laterally uniformly fixed on ground, and for each pedestal upper surface in same level, tank is rectangular frame, and tank bottom is fixed on
On more pedestals, more vertical bottom beams are vertically fixed in pedestal upper surface and are uniformly distributed in tank；Inside groove is fixed in tank；
Tapping pipe passes perpendicularly through tank side and in being fixed on interior groove sidewall, and tapping pipe one end is connected with inner tank interior；Ball valve installation
In the tapping pipe other end；More contour detection pipe uniform verticals are fixed on inside groove side inner wall, and contour detection pipe is with scale
Transparent pipe, the scale upper limit of each contour detection pipe in same level, the lower end of contour detection pipe by threeway with it is same
Sebific duct is connected；
Traction device include rack, reel assemblies, motor, variable-frequency governor, distribution board, drive sprocket, driven sprocket,
Wirerope, reel assemblies are fixed on rack front upper part by two bearing blocks, and motor is fixed on central rack, reel assemblies
Axis is parallel with the axis of motor；Variable-frequency governor is fixed on rack rear portion, and distribution board is fixed on the rack, variable-frequency governor
It is connected respectively with motor with distribution board；Drive sprocket is mounted on motor output shaft, and driven sprocket is fixed on reel assemblies
Spool shaft one end, drive sprocket and driven sprocket constitute chain conveyer；One end of wirerope is fixed on the cylinder of reel assemblies
On reel and it is wrapped on reel；
Hull model includes side batten plate, root edge plate, standard clump weight, bracket, scale, traction sliding slot, under the batten plate of side
Cause angled straight lines section, arc segment, horizontal linear section are constituted, and scale is equipped on the outside of the batten plate of side；Root edge plate both sides and two pieces of sides
Batten plate is vertically fixedly connected with and constitutes die body, and root edge sheet metal forming section is consistent with side batten plate；Traction sliding slot is fixed on
In root edge prelaminar part central symmetry plane；Muti-piece standard clump weight is placed in hull main body；On bracket is fixed on after root edge plate
Portion；
Data acquisition device includes reflecting plate, tension sensor, laser velocimeter sensor, and reflecting plate is fixed on the one of tank
End, laser velocimeter sensor are fixed on bracket；Tension sensor one end is fixed on traction sliding slot, the tension sensor other end
It is fixedly connected with the wirerope other end.
Based on above scheme, the present invention also provides following several preferred embodiments:
Acute angle folded by the angled straight lines section and horizontal linear section of the side batten plate lower edge of the hull model is grounding；Institute
The hull model stated has multiple, and has different grounding and different curvature radius, the hull models of different series forms ship
Body Model group；Hull model grounding in hull model group is 20 °~35 °, the radius of curvature of arc segment be 250mm~
500mm。
The inside groove outer dimension is consistent with tank inside dimension, and inside groove is close to tank inner wall and is fixed.
The tapping pipe has 3, and the water inlet of tapping pipe is different away from inside groove floor height.
Data collecting card and computer are additionally provided in the data acquisition device, data collecting card, computer are placed on ship
In body Model, the tension sensor and laser velocimeter sensor are connected to data collecting card, data collecting card and calculating
Machine is connected.
The reflecting plate is located on the Laser emission path of laser velocimeter sensor, and plate face and laser transmission direction are hung down
Directly, reflecting plate and laser velocimeter sensor constitute one for measuring the measurement component of hull model travel speed.
A kind of boat tractor hull model running resistance detection method using above-mentioned detection experimental rig is specific to walk
Suddenly are as follows:
Step 1: the soil of known type and particle composition, moisture content is inserted inside groove, hack, smooth is carried out to soil
Processing, make soil surface be in a horizontal state, horizontality according to each contour detection pipe horizontal liquid level and inside groove soil surface away from
From judgement；
Step 2: inside groove is filled with a certain amount of water according to the soil moisture content of test requirements document, the upper soll layer depth of water, and quiet
Set the time of test determination；
Step 3: hull model stops at one end in the soil box of paddy field far from traction device, linear speed is required according to wirerope
Degree calculates the drum speed of reel assemblies, then calculates the output frequency setting value that variable-frequency governor needs, and adjust frequency conversion tune
Fast device frequency is to setting value；
Step 4: starting laser velocimeter sensor, data collecting card, tension sensor, start motor, motor passes through
Drive sprocket drives driven sprocket rotation, thus the rotary speed rotation for making the reel of reel assemblies to set, wirerope is to set
Linear velocity is wound on reel, and when wirerope is tightened up, hull model is drawn forward dynamic, laser velocimeter sensor emission at this time
Laser intelligence will reflect energizing signal laser velocimeter sensor receiving end by reflecting plate, laser velocimeter sensor will to reflecting plate
Distance signal is simultaneously converted to speed signal and is transmitted to data collecting card, the pulling force signal of tension sensor also synchronous transfer to data
Capture card；When hull model is led one end to paddy field soil box close to traction device, motor stall；In hull model
In moving process, the hull model travel speed of data collecting card synchronous recording draws force data and is transmitted to computer preservation；
Complete a running resistance detection；
Step 5: replacement has the hull model of different grounding and radius of curvature, hauling speed is set again, is adjusted
Then load standard counterweight number of blocks repeats above-mentioned running resistance detection process, obtain different structure hull model not
With the running resistance in paddy field soil current when speed.
In addition, repeating running resistance detection process by the soil of replacement filling inside groove, different water can also be obtained
Field edaphic condition is gone ashore the running resistance of body Model.
The invention has the advantages that: by changing soil types, saturated soil water content, surface layer in the soil box of paddy field
The depth of water and time of repose obtain the various operating conditions that ship type tractor is walked in paddy field, are capable of each middle operation item of simulated paddy field
Part；Hull model group is formed using the hull model by different groundings and different curvature radius series, it can be to different ground connection
Angle carries out resistance detection from the hull model of radius of curvature under the conditions of different grounding pressures, hauling speed, to obtain difference
The walking resistance of boat tractor under the environmental condition of paddy field, apparatus structure is compact, and hauling speed is stepless adjustable and synchronous with pulling force
Record, meets the requirement that various types ship type tractor moving resistance measurement is wanted, it can also be used to paddy field environmental condition, Ship Structure
The measurement that parameter influences running resistance.
Detailed description of the invention
Fig. 1 is the axonometric drawing of boat tractor hull model running resistance detection experimental rig；
Fig. 2 is the axonometric drawing of boat tractor hull model running resistance detection experimental rig hull model；
Fig. 3 is the plan view of hull model side batten plate of the present invention；
Fig. 4 is the composition block diagram of data acquisition device of the present invention；
In figure: tank 1, pedestal 2, tapping pipe 3, ball valve 4, vertical bottom beam 5, contour detection pipe 7, sebific duct 8, hull model 9, interior
Slot 10, rack 11, reel assemblies 12, motor 13, variable-frequency governor 14, distribution board 15, drive sprocket 16, driven sprocket 17,
Wirerope 18, tension sensor 19, data collecting card 21, computer 22, laser velocimeter sensor 23.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, and the technical characteristic in each embodiment is not rushing
It can be combined with each other in the case where prominent, not constitute restriction.
As shown in Figure 1, boat tractor hull model running resistance detects experimental rig, including paddy field soil box, traction dress
It sets, data acquisition device, hull model 9, traction device is placed in paddy field soil box one end, and hull model 9 is placed in the soil box of paddy field,
Data acquisition device is fixed on hull model 9.
Paddy field soil box includes tank 1, pedestal 2, tapping pipe 3, ball valve 4, vertical bottom beam 5, contour detection pipe 7, sebific duct 8, inside groove
10, more pedestals 2 are laterally uniformly fixed on ground, and in same level, tank 1 is rectangular frame, slot for each 2 upper surface of pedestal
1 bottom of case is fixed on more pedestals 2.More vertical bottom beams 5 are vertically fixed in 2 upper surface of pedestal and are uniformly distributed in tank 1,
For playing the role of support top inside groove 10.Inside groove 10 is fixed in tank 1, and inside 10 outer dimension of inside groove and tank 2
Size is consistent, so that inside groove 10 is close to 2 inner wall of tank and fixes.3 tapping pipes 3 pass perpendicularly through 1 side of tank and in being fixed on inside groove
It is connected inside 10 side walls, 3 one end of tapping pipe and inside groove 10, before ball valve 4 is mounted on 3 other end water outlet of tapping pipe, for controlling
The opening and closing of tapping pipe 3 processed.The water inlet of 3 tapping pipes 3 is different away from 10 floor height of inside groove, therefore after filling the water in inside groove 10,
Water surface elevation by adjusting the opening and closing of different tapping pipes, i.e., in adjustable inside groove 10.More contour 7 uniform verticals of detection pipe are solid
It is scheduled on 10 side inner wall of inside groove, contour detection pipe 7 is to have graduated transparent pipe, and the scale upper limit of each contour detection pipe 7 is same
On one horizontal plane, the upper end opening of contour detection pipe, lower end is connected by threeway with same sebific duct 8.It is carried out by sebific duct 8
After water filling, the water level in different contour detection pipes 7 is consistent, and can be used for judging whether the soil surface in slot is smooth.
Traction device includes rack 11, reel assemblies 12, motor 13, variable-frequency governor 14, distribution board 15, drive sprocket
16, driven sprocket 17, wirerope 18, reel assemblies 12 are fixed on 11 front upper part of rack by two bearing blocks, and motor 13 is solid
It is scheduled on 11 middle part of rack, the axis of reel assemblies 12 is parallel with the axis of motor 13；Variable-frequency governor 14 is fixed on rack 11
Rear portion, distribution board 15 are fixed in rack 11, and variable-frequency governor 14 and distribution board 15 are connected with motor 13 respectively, are respectively used to
Adjust motor speed and be motor.Drive sprocket 16 is mounted on 13 output shaft of motor, and driven sprocket 17 is fixed
In spool shaft one end of reel assemblies 12, drive sprocket 16 and driven sprocket 17 constitute chain conveyer；One end of wirerope 18 is fixed
It on the cylindrical drum of reel assemblies 12 and is wrapped on reel, and is tightened with the rotation of reel.
As shown in Figures 2 and 3, hull model 9 includes side batten plate 9-1, root edge plate 9-2, standard clump weight 9-3, bracket 9-
4, cause angled straight lines section 9-1-1, arc segment 9-1-2, horizontal linear section under scale 9-5, traction sliding slot 9-6, side batten plate 9-1
9-1-3 is constituted, and 3 identical scale 9-5 are equipped on the outside of the batten plate 9-1 of side；The root edge both sides plate 9-2 and two pieces of side batten plate 9-1
It is vertically fixedly connected with and constitutes die body, root edge plate 9-2 contoured cross-section is consistent with side batten plate 9-1；Traction sliding slot 9-6 is fixed
On the root edge plate 9-2 front central plane of symmetry；Muti-piece standard clump weight 9-3 is placed in hull main body, particular number can root
It requires to be adjusted according to the ground pressure of hull；Bracket 9-4 is fixed on the upper back root edge plate 9-2.
Data acquisition device includes reflecting plate 6, tension sensor 19, laser velocimeter sensor 23, and reflecting plate 6 is fixed on slot
One end of case 1, laser velocimeter sensor 23 are fixed on bracket 9-4.Reflecting plate 6 is located at the laser hair of laser velocimeter sensor 23
On rays diameter, and plate face is vertical with laser transmission direction, and reflecting plate 6 and laser velocimeter sensor 23 constitute one and be used for surveying vessel
The measurement component of 9 travel speed of body Model.19 one end of tension sensor is fixed on traction sliding slot 9-6, and tension sensor 19 is another
One end is fixedly connected with 18 other end of wirerope.Data collecting card 21 and computer 22, data are additionally provided in data acquisition device
Capture card 21, computer 22 are placed in hull model 9.As shown in figure 4, tension sensor 19 and laser velocimeter sensor 23 are equal
It is connected to data collecting card 21, data collecting card 21 is connected with computer 22, and the data received are stored in computer 22.
In the present invention, in order to measure the running resistance of different hull models 9, the hull model 9 of different series need to be designed
Form hull model group, multiple hull models 9 with different grounding and different curvature radius in hull model group.With ship
Acute angle folded by the angled straight lines section 9-1-1 and horizontal linear section 9-1-3 of the side batten plate 9-1 lower edge of body Model 9 is grounding, ship
9 grounding of hull model in body Model group is 20 °~35 °, and the radius of curvature of arc segment 9-1-2 is 250mm~500mm.
When carrying out running resistance detection using the device, it can be pre-designed testing program, the soil detected needed for determining
Each seed ginsengs such as type, soil moisture content, the upper soll layer depth of water, hull travel speed, the grounding of hull model 9 and radius of curvature
Number.Then during the test, it can be required according to testing program, different soil, different hull models 9 is selected to be put into inside groove
In 10, running resistance detection is carried out by changing the parameters such as the depth of water, travel speed.
Boat tractor hull model running resistance detection method based on above-mentioned detection experimental rig, specific steps
Are as follows:
Step 1: the soil of known type and particle composition, moisture content is inserted inside groove 10, hack is carried out to soil, is put down
Whole processing, makes soil surface be in a horizontal state.Horizontality is according to each contour 7 horizontal liquid level of detection pipe and inside groove soil surface
Range estimation can be considered that soil surface is smooth complete when soil surface keeps same distance with each contour 7 horizontal liquid level of detection pipe
Finish；
Step 2: inside groove 10 is filled with by a certain amount of water according to the soil moisture content of test requirements document, the upper soll layer depth of water, and
Stand the time of test determination；
Step 3: hull model 9 stops at one end in the soil box of paddy field far from traction device, line is required according to wirerope 18
Speed calculates the drum speed of reel assemblies 12, then calculates the output frequency setting value that variable-frequency governor 14 needs, and adjust
14 frequency of variable-frequency governor is to setting value；
Step 4: starting laser velocimeter sensor 23, data collecting card 21, tension sensor 19, start motor 13, electricity
Motivation 13 drives driven sprocket 17 to rotate by drive sprocket 16, is turned to make the reel of reel assemblies 12 with the rotary speed set
Dynamic, wirerope 18 is wound with setting linear velocity on reel, when wirerope 18 is tightened up, hull model 9 be drawn forward it is dynamic, this
When laser velocimeter sensor 23 emit laser intelligence to reflecting plate 6, energizing signal laser velocimeter sensor will be reflected by reflecting plate 6
23 receiving ends, laser velocimeter sensor 23 is by distance signal and is converted to speed signal and is transmitted to data collecting card 21, and pulling force passes
The pulling force signal of sensor 19 also synchronous transfer to data collecting card 21；It is filled when hull model 9 is led to paddy field soil box close to traction
When the one end set, motor stall；In 9 moving process of hull model, the hull mould of 21 synchronous recording of data collecting card
9 travel speed of type draws force data and is transmitted to the preservation of computer 22；Complete a running resistance detection；
Step 5: replacement has the hull model 9 of different grounding and radius of curvature, hauling speed is set again, is adjusted
Load standard clump weight 9-3 quantity is saved, above-mentioned running resistance detection process is then repeated, obtains different structure hull model
9 running resistance in friction speed in current paddy field soil.In addition, according to test requirements document, the soil of replacement filling inside groove 10,
Repeat running resistance detection process, obtains the running resistance of hull model 9 under the conditions of different paddy field soils.
Claims (8)
1. a kind of boat tractor hull model running resistance detects experimental rig, it is characterised in that including paddy field soil box, traction
Device, data acquisition device, hull model (9), traction device are placed in paddy field soil box one end, and hull model (9) is placed on paddy field
In soil box, data acquisition device is fixed on hull model (9)；
Paddy field soil box includes tank (1), pedestal (2), tapping pipe (3), ball valve (4), vertical bottom beam (5), contour detection pipe (7), glue
(8), inside groove (10) are managed, more pedestals (2) are laterally uniformly fixed on ground, and each pedestal (2) upper surface is in same level, slot
Case (1) is rectangular frame, and tank (1) bottom is fixed on more pedestals (2), and more vertical bottom beams (5) are vertically fixed in pedestal (2)
Upper surface is simultaneously uniformly distributed in tank (1)；Inside groove (10) is fixed in tank (1)；Tapping pipe (3) passes perpendicularly through tank (1)
Side and in being fixed on inside groove (10) side wall, is connected inside tapping pipe (3) one end and inside groove (10)；Ball valve (4), which is mounted on, to be let out
Water pipe (3) other end；More contour detection pipe (7) uniform verticals are fixed on inside groove (10) side inner wall, and contour detection pipe (7) is
Has graduated transparent pipe, in same level, the lower end of contour detection pipe passes through the scale upper limit of each contour detection pipe (7)
Threeway is connected with same sebific duct (8)；
Traction device includes rack (11), reel assemblies (12), motor (13), variable-frequency governor (14), distribution board (15), master
Movable sprocket (16), driven sprocket (17), wirerope (18), before reel assemblies (12) are fixed on rack (11) by two bearing blocks
Top, motor (13) are fixed in the middle part of rack (11), and the axis of reel assemblies (12) is parallel with the axis of motor (13)；Become
Frequency governor (14) is fixed on rack (11) rear portion, and distribution board (15) is fixed on rack (11), variable-frequency governor (14) and matches
Electroplax (15) is connected with motor (13) respectively；Drive sprocket (16) is mounted on motor (13) output shaft, driven sprocket
(17) it is fixed on spool shaft one end of reel assemblies (12), drive sprocket (16) and driven sprocket (17) constitute chain conveyer；Steel wire
One end of rope (18) is fixed on the cylindrical drum of reel assemblies (12) and is wrapped on reel；
Hull model (9) includes side batten plate (9-1), root edge plate (9-2), standard clump weight (9-3), bracket (9-4), scale
(9-5), sliding slot (9-6) is drawn, cause angled straight lines section (9-1-1), arc segment (9-1-2), level are straight under side batten plate (9-1)
Line segment (9-1-3) is constituted, and is equipped with scale (9-5) on the outside of side batten plate (9-1)；The root edge plate both sides (9-2) and two blocks of side batten plates
(9-1) is vertically fixedly connected with and constitutes die body, and root edge plate (9-2) contoured cross-section and side batten plate (9-1) are consistent；Traction is slided
Slot (9-6) is fixed on root edge plate (9-2) front central plane of symmetry；Muti-piece standard clump weight (9- is placed in hull main body
3)；Bracket (9-4) is fixed on the upper back root edge plate (9-2)；
Data acquisition device includes reflecting plate (6), tension sensor (19), laser velocimeter sensor (23), and reflecting plate (6) is fixed
In one end of tank (1), laser velocimeter sensor (23) is fixed on bracket (9-4)；Tension sensor (19) one end is fixed on
It draws on sliding slot (9-6), tension sensor (19) other end is fixedly connected with wirerope (18) other end.
2. boat tractor hull model running resistance according to claim 1 detects experimental rig, it is characterised in that ship
The angled straight lines section (9-1-1) of side batten plate (9-1) lower edge of body Model (9) is with acute angle folded by horizontal linear section (9-1-3)
Grounding；The hull model (9) have it is multiple, and have different grounding and different curvature radius, the ship of different series
Body Model (9) forms hull model group；Hull model (9) grounding in hull model group is 20 °~35 °, arc segment (9-1-
2) radius of curvature is 250mm~500mm.
3. boat tractor hull model running resistance according to claim 1 detects experimental rig, it is characterised in that interior
Slot (10) outer dimension is consistent with tank (1) inside dimension, and inside groove (10) is close to tank (1) inner wall and is fixed.
4. boat tractor hull model running resistance according to claim 1 detects experimental rig, it is characterised in that institute
The tapping pipe (3) stated has 3, and the water inlet of tapping pipe (3) is away from inside groove (10) floor height difference.
5. boat tractor hull model running resistance according to claim 1 detects experimental rig, which is characterized in that number
According to data collecting card (21) and computer (22) is additionally provided in acquisition device, data collecting card (21), computer (22) are placed on
In hull model (9), the tension sensor (19) and laser velocimeter sensor (23) is connected to data collecting card (21),
Data collecting card (21) is connected with computer (22).
6. boat tractor hull model running resistance according to claim 1 detects experimental rig, it is characterised in that institute
The reflecting plate (6) stated is located on the Laser emission path of laser velocimeter sensor (23), and plate face is vertical with laser transmission direction,
Reflecting plate (6) and laser velocimeter sensor (23) constitute one for measuring the measurement component of hull model (9) travel speed.
7. a kind of boat tractor hull model running resistance detection side using detection experimental rig as described in claim 1
Method, it is characterised in that:
Step 1: the soil of known type and particle composition, moisture content is inserted inside groove (10), hack, smooth is carried out to soil
Processing, makes soil surface be in a horizontal state, and horizontality is according to each contour detection pipe (7) horizontal liquid level and inside groove soil surface
Range estimation；
Step 2: inside groove (10) is filled with a certain amount of water according to the soil moisture content of test requirements document, the upper soll layer depth of water, and quiet
Set the time of test determination；
Step 3: hull model (9) stops at one end in the soil box of paddy field far from traction device, line is required according to wirerope (18)
Speed calculates the drum speed of reel assemblies (12), then calculates the output frequency setting value that variable-frequency governor (14) need, and
Variable-frequency governor (14) frequency is adjusted to setting value；
Step 4: starting laser velocimeter sensor (23), data collecting card (21), tension sensor (19), start motor
(13), motor (13) drives driven sprocket (17) rotation by drive sprocket (16), to make the reel of reel assemblies (12)
It being rotated with the rotary speed of setting, wirerope (18) is wound with setting linear velocity on reel, when wirerope (18) is tightened up, ship
Body Model (9) be drawn forward it is dynamic, at this time laser velocimeter sensor (23) emit laser intelligence to reflecting plate (6), pass through reflecting plate
(6) energizing signal laser velocimeter sensor (23) receiving end will be reflected, laser velocimeter sensor (23) is by distance signal and is converted to
Speed signal is transmitted to data collecting card (21), the pulling force signal of tension sensor (19) also synchronous transfer to data collecting card
(21)；When hull model (9) is led one end to paddy field soil box close to traction device, motor stall；In hull mould
In type (9) moving process, hull model (9) travel speed of data collecting card (21) synchronous recording is drawn force data and is transmitted
It is saved to computer (22)；Complete a running resistance detection；
Step 5: replacement has the hull model (9) of different grounding and radius of curvature, hauling speed is set again, is adjusted
Then load standard clump weight (9-3) quantity repeats above-mentioned running resistance detection process, obtain different structure hull model
(9) running resistance in friction speed in current paddy field soil.
8. running resistance detection method as claimed in claim 7, which is characterized in that the soil of replacement filling inside groove (10), weight
Running resistance detection process is carried out again, obtains the running resistance of hull model (9) under the conditions of different paddy field soils.
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| CN111459132A (en) * | 2020-03-12 | 2020-07-28 | 武汉理工大学 | Evaluation method and system for navigation function of ship |
| CN112973827A (en) * | 2021-05-19 | 2021-06-18 | 江西农业大学 | Small-size simple and easy paddy field soil box test bench |
| CN113148055B (en) * | 2021-05-25 | 2022-09-27 | 哈尔滨工程大学 | Temporary test pool false bottom unit and wave resistance test method based on temporary test pool false bottom unit |
| CN114354164B (en) * | 2021-12-30 | 2023-12-12 | 宁波市产品食品质量检验研究院(宁波市纤维检验所) | Garbage bin performance detection device |
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Application publication date: 20180904 Assignee: ZHEJIANG LIULIN AGRICULTURAL MACHINERY CO.,LTD. Assignor: ZHEJIANG University Contract record no.: X2022330000055 Denomination of invention: Test device and method for detecting driving resistance of ship tractor hull model Granted publication date: 20191115 License type: Common License Record date: 20220315 |