CN206095481U - Bionical nonsmooth surface frictional resistance testing arrangement based on under water - Google Patents
Bionical nonsmooth surface frictional resistance testing arrangement based on under water Download PDFInfo
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- CN206095481U CN206095481U CN201620848031.7U CN201620848031U CN206095481U CN 206095481 U CN206095481 U CN 206095481U CN 201620848031 U CN201620848031 U CN 201620848031U CN 206095481 U CN206095481 U CN 206095481U
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Abstract
Bionical nonsmooth surface frictional resistance testing arrangement based on under water, including the test platform support, the rotation test part in the sealed chamber in area, power input assembly, the water distribution subassembly, remove subassembly and signal processing subassembly, the rotation test part includes the rotation axis, rotatory epaxial seal assembly, sealed chamber subassembly and experimental exemplar testing component, the rotation axis is installed on the through -hole that sealed chamber left end was covered, seal assembly is equipped with to the rotation axis outer end of dropping on the outside of sealed chamber subassembly, drop on sealed chamber inside rotation axis the inner of subassembly and install experimental exemplar testing component, the rotation test part has the same installation center height with power input assembly, signal processing subassembly and removal subassembly. The utility model discloses profitable effect is: the realization is experimental and experimental based on the test of the bionical nonsmooth surface frictional resistance under different pressure in the frictional resistance test under the water environment to bionical nonsmooth surface, processing ease, save time, reduction use cost, accuracy.
Description
Technical field
The utility model is related to a kind of based on bionic non-smooth surface frictional resistance test device under water.
Background technology
Friction is one of major way of energy loss, and object is moved under water, and the 70%～80% of resistance is all surface
Frictional resistance.In high-speed motion, frictional resistance accounts for 40% of drag overall or so.How friction loss, energy saving are reduced
It is the popular project of current research.Current drag reduction method both domestic and external includes the following aspects：Drag Reduction With Additives, coating subtract
Resistance, Friction Reduction by Micro-bubbles, groove drag reduction, joint drag reduction, additionally, drag reduction method also have Wall Vibration drag reduction, with traveling wave drag reduction, body
Drag reduction, magnetic drag reduction, silt drag reduction etc..Development in terms of the effort of the researcher of decades, particularly turbulence theory, makes
The further research and application for obtaining drag reduction technology achieves breakthrough progress.The biology of nature experienced the evolution of nearly hundred million years
Process, possesses the structured non-smooth surface for adapting to environment, and most of structure possesses the energy for reducing its skin friction resistance coefficient
Power, it is possible to by the research to biological surface, the more preferable structure of design production drag-reduction effect.
At present the research of bionic non-smooth surface drag reduction is increasingly mature, and such as in life, Sweden designer is based on lotus
The principle of leaf, designs self-cleaning plate, without the need for hand washing.The swimming suit designed based on shark skin surface, substantially increases ratio
The speed of Games-time swimming.In production of energy, application of the bionic non-smooth surface drag reduction in oil and gas pipes and pump blade, very greatly
The resistance reduced in transportation of degree, improves the pressure and speed transported in pipeline.Germany scientist imitates sharkskin
Face coat so that the lift-drag ratio of blade is improved and exceeded 30%.In agricultural, the bull-dozer for imitating soil animal can be effective
Viscosity reduction drag reduction, reduces energy ezpenditure, improve production efficiency.In military affairs, the tables such as submarine, aircraft and science and technology of aviation are had been used to
Face, significantly more efficient can lift flight and headway.Therefore the total development trend of bionic, drag-reducing technology is：Bionical non-light
Sliding surface possesses more preferably drag-reduction effect, in order to reduce abrasion in daily life, improves the service efficiency of the energy.Thus one
Precisely efficient research of the test platform to non-smooth surface drag reduction seems more and more important to set.
At present drag reduction test device can be divided three classes, and this three class is respectively：Water tunnel test device, wind tunnel test test dress
Put, tank (pond) experimental rig.It is mostly by trying with reference to drag reduction based on the research of bionic non-smooth surface drag reduction under water
The achievement in research tested is put into again in actual engineering application, a set of to test accurately and effectively flat based on background above
Platform just seems rather important in theoretical research work.If tested on a production line using traditional experimental rig, then
Required testing expenses are very high, and the cycle is long, and risk is big and data discrete is inaccurate.And it is small-sized based on bionical non-light under water
Sliding mantle friction drag reduction test device has controllability strong, data reliability, the characteristics of test simple and convenient.
The content of the invention
In order to the drag reduction test device testing expenses for solving current are very high, the cycle is long, and risk is big and data discrete is not smart
True problem, the utility model proposes a kind of controllability is strong, data reliability, test is simply and easily bionical non-based under water
Smooth surface frictional resistance test device.
It is described in the utility model based on bionic non-smooth surface frictional resistance test device under water, including test platform
Support, the rotary test part with annular seal space, power input module, with water assembly, moving assembly and signal processing component, it is described
Rotary test part, power input module and with water assembly all be arranged on described test platform support on, described shifting
Dynamic component is affixed with described test platform support；The power input module is by first shaft coupling and described signal transacting
The power intake connection of component, the clutch end of the signal processing component is by second shaft coupling and the rotary test
Rotary shaft one end of part is connected, and the rotary test part other end installs moving assembly；The water inlet pipe with water assembly with
The blasthole pipeline connection of the rotary test part, the outlet pipe with water assembly goes out with described rotary test part
Water hole pipeline is connected, it is characterised in that：Described rotary test part includes the rotary shaft, black box in rotary shaft, close
Seal chamber component and be placed in the test exemplar test suite of annular seal space component internal, the rotary shaft is arranged on annular seal space left end cap
On through hole on, the rotary shaft outer end fallen in the outside of annular seal space component falls in annular seal space component internal equipped with black box
Rotary shaft the inner is provided with test exemplar test suite；Described rotary test part and power input module, signal transacting group
Part and moving assembly have identical installation center height；
The black box be magnet fluid sealing, including annular permanent magnet, two pieces with permanent magnet matching merge phase
Same pole shoe, has teeth groove on every piece of pole shoe inwall；Two pieces of pole shoes, formed relative motion revolving part and pole shoes and revolving part it
Between gap constitute magnetic circuit, the magnetic seal being formed on revolving part；Whole black box is placed in axle sleeve, the axle
Set is connected on annular seal space left end cap by screw；Black box or so two ends are placed with respectively adjust pad, the sealing group
Part left end is placed with bearing holder (housing, cover) and plays a part of axial restraint to black box, and the bearing holder (housing, cover) is connected on axle sleeve by screw
Relevant position；The bearing (ball) cover is connected on bearing holder (housing, cover) relevant position to the angular contact ball bearing in rotary shaft by screw
Axially position effect is played, notch cuttype groove sealing structure is provided with the bearing (ball) cover；
The annular seal space component includes the annular seal space with blasthole and apopore, annular seal space left end cap and annular seal space right-hand member
Lid, is provided with the screwed hole for exhaust on the annular seal space, the screwed hole is furnished with corresponding sealing bolt；Annular seal space left end
Lid, annular seal space right end cap seal affixed with annular seal space both ends of the surface respectively；The inner face through hole outer ring of the annular seal space left end cap sets
There is the annular frustum cone structure for laying thrust ball bearing, thrust ball bearing end cap is arranged on truncated cone-shaped structure end face；Described
Annular seal space right end cap is provided with the unthreaded hole for installing hydraulic support；Whole annular seal space component is arranged on test platform support
Corresponding site；
The test exemplar test suite include sample carrier, sample door, shaft end ring, the first test exemplar, the
Two test exemplars and the hydraulic support for being pressed against the second test sample surface, the test exemplar test suite is except pressure
Rotary shaft inner end is installed in outside support；The sample carrier is sleeved on rotary shaft the inner outer wall and by the shaft shoulder and connection
Keying connects；The first test exemplar is enclosed within sample carrier outer wall and affixed therewith, and described sample door is by shaft end gear
Circle is affixed with rotary shaft inner face, realizes the axially position of the first test exemplar；The second test exemplar is consolidated with sample door
Connect；Described hydraulic support be slidably connected with described annular seal space right-hand member cover seal and described hydraulic support outer end force
End face is provided with pressure sensor.
The moving assembly include screw support seat, screw rod, handle, mobile support, spur gear wheel, for straight with cylinder
The tooth bar and tooth bar fixed plate of gear engagement, the screw support seat is connected in annular seal space right-hand member cover outer wall by bolt, described
Screw rod be spirally connected with described screw support seat, and described screw rod the inner, screw rod right-hand member corresponding with pressure sensor position
Connected handle；Described mobile frame upper is connected by bolt with described screw support seat, the mobile frame bottom peace
Equipped with spur gear wheel；The tooth bar is welded in and pre-fixes in the tooth bar fixed plate of test platform support relevant position, and tooth bar is solid
Fixed board or so two ends are welded with postive stop baffle.
The power input module includes motor, first shaft coupling and motor support frame, and motor is connected in electricity by bolt
On machine bracing frame, motor support frame is arranged on the relevant position on test platform support；The output shaft of motor passes through the first shaft coupling
Device is connected with described signal processing component.
The signal processing component includes torque signal coupler, torque signal coupler support and second shaft coupling, institute
State torque signal coupler to be connected on torque signal coupler support by screw, torque signal coupler support passes through screw
The relevant position being connected on motor support frame；A torque signal coupler left side connects first shaft coupling, and the right side connects second shaft coupling.
Described includes tank, centrifugal pump, water inlet pipe and outlet pipe with water assembly, and the water inlet of described centrifugal pump passes through
Pipeline is introduced in described tank, and the delivery port of described centrifugal pump is connected with the water inlet end of described water inlet pipe, and described enters
The water side of water pipe is connected with the blasthole of described annular seal space, and the described water inlet end of outlet pipe connects with the apopore of annular seal space
Logical, the water side of described outlet pipe is introduced in described tank, realizes the circulation of test water；Described outlet pipe is provided with
Ball valve；The annular seal space inlet pipeline is supported using steel tube frame.
Described hydraulic support include press surface for being pressed against on the second test exemplar end face, at least one be used for
Depression bar that annular seal space right end cap is slidably connected and the stress surface contacted for the force section with moving assembly, described depression bar is passed through
The unthreaded hole on annular seal space right end cap is worn, and described press surface is affixed with depression bar the inner, and stress surface is affixed with depression bar outer end, makes
Press surface described in obtaining is always positioned at described annular seal space inner chamber, and stress surface is located at outside described annular seal space, realizes testing and props up
Frame is slidably connected with annular seal space right-hand member cover seal.
The axle sleeve is made using the aluminium alloy of non-magnet material.
Described first shaft coupling and second shaft coupling is elastic dowel pin shaft coupling.
The first test exemplar and the second test exemplar are polytetrafluoroethylmaterial material.
Black box in the utility model is magnet fluid sealing, by annular permanent magnet (N-S), pole shoe and rotary shaft
The magnetic circuit for being constituted, under the magnetic fields that magnet is produced, adds the magnetic fluid being placed between axle and pole shoe top gap
To concentrate so as to form the "O" ring of, gap passage is blocked the purpose for reaching sealing.Magnet fluid sealing is because be liquid
The sealing that body is formed, as long as in the pressure differential range for allowing, it is possible to achieve zero leakage, and be non-contacting seal, will not
Friction is produced between potted component and rotary shaft, the accuracy of torque couplings measurement can be improved.Axle sleeve is using non-magnetic
Material aluminium alloy is made, its endoporus and two pieces of pole shoe interference fits.Before experiment starts, water is filled in the sink, cover cover plate.Together
When, the valve of cavity lower end drainage pipeline is closed, and turn on the bolt of cavity upper end.Start water pump after preparing properly, by water
It is transported in seal cavity by aqueduct, the air in cavity is discharged by screwed hole, with the continuous injection of liquid, when
When water covers screwed hole, switch off the pump, and bolt is tightened again.Now, the motor of the other end is opened, axle rotation is rotated
Turn, complete frictional resistance test experiments of the bionic non-smooth surface under water environment.After all off-tests, annular seal space is turned on
The drainage pipeline ball valve of body lower end, water will be flowed back to all in screw clamp under gravity, realizes recycling for water.Cavity
The material of interior selection is waterproof antirust material, and for safety, periodically opening cavity carries out maintaining, to avoid getting rusty.
Water in test has reached the standard for recycling in this test, green, environmentally friendly, pollution-free.If necessary to there is external pressurized
Carry out under the conditions of power, then from corresponding test exemplar, and slowly promote hydraulic support to give test sample by crank handle
Part surface certain pressure, due to the self-lock ability of screw rod, can make test sample surface there is constant pressure all the time, by moment of torsion
Signal coupler measures the moment of torsion under this kind of constant-pressure conditions.When needing to change the sample exemplar of different surfaces structure, chamber of back-outing
The bolt of body right-hand member, is driven by the rack and pinion engagement below moving assembly, by overall annular seal space right end cap and pressure
Device is displaced outwardly, and now changes test exemplar, after exemplar to be tested is more finished changing, platform is back moved, then bolt of screwing on, just
Lower battery of tests can be carried out.
The TT＆C software part of the signal processor of this Test Data Acquisition System is write by LabVIEW.Doing bionical non-light
When sliding frictional resistance test experiments of the surface under water environment, motor is rotated axle rotation, rotary shaft by torque couplings
On first test exemplar with identical angular speed rotation, first test exemplar be subject to fluid frictional resistance, frictional resistance turn
Chemical conversion moment of torsion is by rotary shaft measured by torque signal coupler.Frictional resistance testing experiment in the case where impressed pressure is done
When, the second test exemplar is subject to pressure of the hydraulic support to it, and in the second test exemplar surface of revolution frictional resistance, friction are produced
Resistance change into moment of torsion by rotary shaft measured by torque signal coupler.The analog signal that torque signal coupler is collected
The process of conversion, amplification and filtering through transmitter, by the signal that sensor is collected energy and data acquisition module are converted to
The analog signal of connection, analog signal carries out A/D conversions through data acquisition module, is changed into what is can stored by signal processor
Data signal, in being stored in signal processor.
The utility model has the advantages that：This device can realize the friction to bionic non-smooth surface under water environment
Resistance measurement is tested and based on bionic non-smooth surface frictional resistance testing experiment at various pressures.Doing bionical non-light
When sliding frictional resistance testing experiment of the surface under water environment, test exemplar can be processed into different ridge-like structures, such as pit knot
Structure, bulge-structure, square type structure etc.；Or in test exemplar surface coating coatings.By data acquisition system in different examinations
The torque signal value tested in the case of exemplar, carries out comparing, obtains the drag-reduction effect of different surfaces structure, studies bionical non-light
The property of reduction drag of sliding surface texture；When doing based on bionic non-smooth surface frictional resistance testing experiment at various pressures,
The drag reduction effect under the torque of the non-smooth surface of different structure at various pressures, and then relatively more different operating modes can be compared
Really.This experimental rig data collecting system simple structure, processing ease, test is accurate.When certain situation test exemplar has been tested
Cheng Hou, need to only change test exemplar, and this experimental rig design moving assembly is used to test the replacing of exemplar, this Renewal process
Simply, processing ease, saving time, reduction use cost；Water supply part can realize water by coordinating centrifugal pump, PVC ball valves
Recycle, and test fluid medium be water, it is environment friendly and pollution-free；Magnet fluid sealing is adopted at revolution dynamic sealing, with it
Life-span length, without abrasion, the friction that zero leakage can be realized, potted component and rotary shaft will not be produced, therefore moment of torsion can be improved
The accuracy of measurement.
Description of the drawings
Fig. 1 is structure chart of the present utility model.
Fig. 2 is top view of the present utility model.
Fig. 3 is first test exemplar of the utility model with ellipse projection non-smooth surface.
Fig. 4 a are second test exemplar of the utility model with ellipse projection non-smooth surface.
Fig. 4 b are the A-A views of Fig. 4 a.
Fig. 5 is the structure chart of rotary test part of the present utility model.
Fig. 6 is moving assembly structure chart of the present utility model.
Fig. 7 is the structure chart of black box of the present utility model.
Specific embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings
Referring to the drawings：
Embodiment 1 implements described in the utility model based on bionic non-smooth surface frictional resistance test device under water,
Including test platform support, the rotary test part with annular seal space, power input module, with water assembly, moving assembly and signal
Process assembly, described rotary test part, power input module and with water assembly all installed in described test platform
On frame, described moving assembly is welded with described test platform support；The power input module by first shaft coupling with
The power intake connection of described signal processing component, the clutch end of the signal processing component passes through second shaft coupling
It is connected with rotary shaft one end of the rotary test part, the rotary test part other end installs moving assembly；The water distribution
The water inlet pipe of component is connected with the blasthole pipeline of the rotary test part, the outlet pipe with water assembly and described rotation
The apopore pipeline of transfer to test part is connected,
As shown in figure 5, the rotary test part include rotary shaft 25, rotary shaft on black box, annular seal space component,
Test exemplar test suite.It is corresponding that the rotary shaft 25 is arranged on annular seal space left end cap by the through hole on annular seal space left end cap 17
On position, rotary shaft left end is equipped with black box, and right-hand member is provided with test exemplar test suite, whole test exemplar test suite
It is placed in annular seal space component internal.Rotary test part is welded on test platform support 2 using floor 50, and is kept defeated with power
Enter component, signal processing component and moving assembly and there is identical installation center height.
As shown in fig. 7, the black box is magnet fluid sealing, including annular permanent magnet, two pieces and permanent magnet
The identical pole shoe 13 being engaged, has teeth groove on every piece of pole shoe inwall；Two pieces of pole shoes, the revolving part of formation relative motion and poles
Gap between boots and revolving part constitutes magnetic circuit, the magnetic seal being formed on revolving part.Whole black box is placed in
In axle sleeve 12, the axle sleeve 12 is connected on annular seal space left end cap 17 by screw.Black box or so two ends are placed with respectively
Adjust pad, the black box left end is placed with bearing holder (housing, cover) 11 and plays a part of axial restraint, the bearing to black box
Set logical 11 crosses the relevant position that screw is connected on axle sleeve 12.The bearing (ball) cover 8 is connected in phase on bearing holder (housing, cover) 11 by screw
Answer position that axially position effect is played to the angular contact ball bearing 10 in rotary shaft 25, on the bearing (ball) cover 8 notch cuttype is provided with
Groove sealing structure, prevents external dust from entering the service life for affecting angular contact ball bearing 10.
The annular seal space component includes the annular seal space 19 with inlet opening and apopore, annular seal space left end cap 17 and annular seal space
Right end cap 29.The screwed hole for exhaust is provided with the annular seal space 19, the screwed hole is furnished with corresponding sealing bolt 23.Institute
State annular seal space left end cap 17 and be separately mounted to the two ends of annular seal space 19 with annular seal space right end cap 29.Annular seal space left end cap 17 and sealing
Chamber right end cap 29 is connected in seal cavity 19 by screw, annular seal space left end cap 17 and annular seal space right end cap 29 and annular seal space 19
Contact portion is equipped with gasket seal, forces static gasket to be sealed using the pretension of bolt.The annular seal space left end cap
Annular frustum cone structure is provided with 17 for laying thrust ball bearing 15, and is connected in thrust ball bearing end cap 16 using screw
The relevant position of the truncated cone-shaped structure of annular seal space left end cap 17, to thrust ball bearing 15 axially position is played a part of.The sealing
The through hole for laying hydraulic support 30 is provided with chamber right end cap 29, the depression bar of every hydraulic support 30 passes through annular seal space right end cap
Relevant position on through hole, is furnished with o type sealing rings and is sealed on each through hole.Be provided with the annular seal space right end cap 29 for
The unthreaded hole of the connecting screw rod support base of bolt 31, is furnished with corresponding bolt 31 on each unthreaded hole, and unthreaded hole is entered using gasket seal
Row sealing.Whole annular seal space component is welded in the corresponding site on test platform support 2 by floor 50.
The test exemplar test suite includes sample carrier 24, sample door 26, shaft end ring 28, the first test sample
Part 22 is as shown in Figure 3, the second test exemplar 27 is as shown in Figure 4, hydraulic support 30.The test exemplar test suite is except pressure
It is installed on the right-hand member relevant position of rotary shaft 25 outside support 30.The sample carrier 24 is sleeved on the right-hand member of rotary shaft 25 and passes through
The shaft shoulder carries out axial restraint, and key 18 is connected between sample carrier 24 and rotary shaft 25 to be carried out circumferentially admittedly to sample carrier 24
It is fixed.The first test exemplar 22 is enclosed within sample carrier 24, and sample door 26 is placed in into the right side of the first test exemplar 22
Relevant position, and shaft end ring 28 is connected in rotary shaft 25 by screw sample door 26 is played axial restraint effect, from
And realize the fixation of the first test exemplar 22.The second test exemplar 27 is connected on sample door 26 by screw.It is described
Hydraulic support 30 is arranged on the corresponding position of annular seal space right end cap 29, and the depression bar of hydraulic support 30 is carried out by o types sealing ring
Sealing, hydraulic support 30 can carry out the movement of left and right by the stress of screw rod on moving assembly 36, to the second test exemplar 27 surface
Apply pressure, pressure sensor 35 is installed in the screw rod pressure surface 34, institute on the second test exemplar 27 when can receive test
The power received, tests the bionic non-smooth surface frictional resistance under different stressing conditions.
As shown in fig. 6, the moving assembly includes screw support seat 32, screw rod 36, handle 37, mobile support 39, spacing
Baffle plate 40, spur gear wheel 41, tooth bar fixed plate 42, tooth bar 43.The screw support seat 32 is connected in sealing by bolt 36
On chamber left end cap 17, it is connected with female nut 38, the nut 38 and screw rod by screw on screw support seat 32
36 screw thread is coordinated, and the right-hand member of screw rod 36 is connected handle 37, and by the rotation of handle 37 screw rod 36 is moved left and right.Screw rod
Support seat 32 is connected by bolt with mobile support 39, and the bottom of mobile support 39 is provided with spur gear wheel 41 with the tooth bar
43 are engaged, and using the drive mechanism of rack-and-pinion, are conducive to stationarity when being driven, and are not damaged to cavity wall, do not destroy chamber
Sealing after body weight conjunction.The tooth bar 43 is welded in tooth bar fixed plate 42, and the two ends of tooth bar fixed plate 42 or so are welded with limiting block
Plate 40, makes whole moving assembly move in certain scope.
As depicted in figs. 1 and 2, the power input module includes motor 3, first shaft coupling 4 and motor support frame 51, electricity
Machine 3 is connected on motor support frame 51 by bolt, and motor support frame 51 is placed in the relevant position on test platform support 2,
It is connected on test platform support 2 by welding；The shaft extension of motor 3 connects the left end of first shaft coupling 4, and the right-hand member of first shaft coupling 4 connects
Connect described signal processing component.The signal processing component comprising signal torque coupler 6, torque signal coupler support 5,
Second shaft coupling 7；The torque signal coupler 6 is connected on torque signal coupler support 5 by screw, torque signal coupling
Clutch support 5 is connected in the relevant position on motor support frame 51 by screw；A torque signal coupler left side connects first shaft coupling
4, the right side connects second shaft coupling 7.
The signal processing component includes torque signal coupler, torque signal coupler support and second shaft coupling, institute
State torque signal coupler to be connected on torque signal coupler support by screw, torque signal coupler support passes through screw
The relevant position being connected on motor support frame；A torque signal coupler left side connects first shaft coupling, and the right side connects second shaft coupling.
It is described to include tank 48, centrifugal pump 47, water inlet pipe 20 and outlet pipe with water assembly, the water inlet of described centrifugal pump
In tank 48 described in mouthful being introduced by pipeline, the delivery port of described centrifugal pump 47 and the water inlet end phase of described water inlet pipe
Even, the water side of described water inlet pipe is connected with the blasthole of described annular seal space, the water inlet end of described outlet pipe with seal
The apopore connection in chamber, the water side of described outlet pipe is introduced in described tank 48, realizes the circulation of test water；It is described
Outlet pipe be provided with ball valve 49.The tunnel of annular seal space water inlet pipe 20 is supported using steel tube frame 33.
Described hydraulic support include press surface for being pressed against on the second test exemplar end face, at least one be used for
Depression bar that annular seal space right end cap is slidably connected and the stress surface contacted for the force section with moving assembly, described depression bar is passed through
The unthreaded hole on annular seal space right end cap is worn, and described press surface is affixed with depression bar the inner, and stress surface is affixed with depression bar outer end, makes
Press surface described in obtaining is always positioned at described annular seal space inner chamber, and stress surface is located at outside described annular seal space, realizes testing and props up
Frame is slidably connected with annular seal space right-hand member cover seal.
Described first shaft coupling 4 and second shaft coupling 7 is elastic dowel pin shaft coupling.
The first test exemplar 22 and second test exemplar 27 is polytetrafluoroethylmaterial material.
The axle sleeve 12 is made using the aluminium alloy of non-magnet material.
In said structure：1st, 9,14,44 bolt is represented.
Black box in the utility model is magnet fluid sealing, by annular permanent magnet (N-S), pole shoe 13 and rotation
The magnetic circuit that axle 25 is constituted, under the magnetic fields that magnet is produced, being placed on rotary shaft 25 and the top gap of pole shoe 13
Between magnetic fluid concentrated so as to form the "O" ring of, gap passage blocked the purpose for reaching sealing.Magnetic fluid
Seal because being the sealing that liquid is formed, as long as in the pressure differential range for allowing, it is possible to achieve zero leakage, and be noncontact
Formula is sealed, and friction will not be produced between potted component and rotary shaft, can improve the accuracy of torque couplings measurement.Axle sleeve
12 are made using non-magnet material aluminium alloy, its endoporus and two pieces of pole shoe interference fits.Before experiment starts, fill in tank 48
Water, covers cover plate.Meanwhile, the ball valve 49 closed on drainage pipeline, and turn on the bolt 23 of seal cavity upper end.Prepare appropriate
Start centrifugal pump 47 afterwards, water is transported in seal cavity by aqueduct, the air in cavity is discharged by screwed hole, with
The continuous injection of liquid, when water covers screwed hole, centrifugal pump 47 is closed, and bolt 23 is tightened again.Now, open another
The motor 3 of one end, is rotated axle 25 and rotates, and completes frictional resistance test experiments of the bionic non-smooth surface under water environment.
If necessary to carry out under the conditions of having impressed pressure, then from corresponding test exemplar, and slowly pushed away by crank handle 37
Dynamic hydraulic support 30 gives the surface certain pressure of the second sample 27, due to the self-lock ability of screw rod 36, can make the second test sample
All the time there is constant pressure in the surface of part 27, the frictional force under the conditions of this kind is measured by torque signal coupler 6.When need change
During the sample exemplar of different surfaces structure, the bolt of seal cavity of back-outing right-hand member, by the tooth bar of gear 41 below moving assembly
42 engaged transmissions, the overall wall of annular seal space right end cap 29 and device for exerting are displaced outwardly, and now change test exemplar, are treated
After test exemplar is changed, moving assembly is back moved, when annular seal space right end cap 29 compresses gasket seal with annular seal space 19
After laminating, then bolt of screwing on, just can carry out lower battery of tests.After all experiments terminate, the draining of seal cavity lower end is turned on
Ball valve 49 on pipeline, water will be flowed back to all in screw clamp 48 under gravity.The material that annular seal space is selected is waterproof
Antirust material, for safety, periodically opening cavity carries out maintaining, to avoid getting rusty.Water in test is in this test
The standard for recycling has been reached, it is green, environmentally friendly, pollution-free.
The TT＆C software part of the signal processor of this Test Data Acquisition System is write by LabVIEW.Doing bionical non-light
When sliding frictional resistance test experiments of the surface under water environment, motor 3 is rotated axle 25 and rotates by torque couplings 6, with
The first test exemplar 22 that rotary shaft 25 is connected is rubbed with the rotation of identical angular speed, the first test exemplar 22 by fluid
Resistance, frictional resistance change into moment of torsion by rotary shaft 25 measured by torque signal coupler 6.In the case where impressed pressure is done
During frictional resistance testing experiment, the second test exemplar 27 is subject to pressure of the hydraulic support 30 to it, revolves in the second test exemplar 27
Turn surface produce frictional resistance, frictional resistance change into moment of torsion by rotary shaft 25 measured by torque signal coupler 6.Moment of torsion
The analog signal that signal coupler 6 is collected collects sensor through the process of the conversion, amplification and filtering of transmitter
Signal is converted to the analog signal that can be connected with data acquisition module, and analog signal carries out A/D conversions through data acquisition module,
It is changed into the data signal that can be stored by signal processor, in being stored in signal processor.
Installation process：The installation of rotary test part：On the rotary shaft by bonded sample carrier, then it is inserted in first
Test exemplar, in the right-hand member laminating sample door of the first test exemplar, is pressed on shaft end ring on sample door by screw,
So as to realize the fixation to sample door.Second test exemplar is connected on sample door by screw.Sample carrier is by axle
Shoulder and sample door realize axial restraint, are realized by key circumferentially fixed.The thrust that first test exemplar passes through sample door
Realize fixing.Relevant position annular seal space being welded in by floor on test platform support, by screw by annular seal space left end cap
It is connected in seal cavity, has gasket seal to seal between annular seal space and annular seal space left end cap, thrust ball bearing is placed on close
Thrust ball bearing end cap is connected in into annular seal space left end cap round platform using screw at the round platform of envelope chamber left end cap relevant position corresponding
At position, the axial restraint to thrust ball bearing is realized.The rotary shaft of test exemplar will before be installed from annular seal space left end cap
The right load, recycle screw axle sleeve is connected on annular seal space left end cap, black box is put in axle sleeve, by screw
Bearing holder (housing, cover) is connected on axle sleeve, the axial restraint to black box is realized.Angular contact ball bearing is put in bearing holder (housing, cover), is passed through
Screw is connected in bearing (ball) cover on bearing holder (housing, cover), and using the shaft shoulder and bearing (ball) cover the axial restraint of diagonal contact ball bearing is realized.
Depression bar is welded in pressure surface, the unthreaded hole through on relevant position on annular seal space right end cap, o type sealing rings are installed at unthreaded hole
Sealing function is played to depression bar, screw rod pressure surface is connected on depression bar using screw, pressure biography is installed in screw rod pressure surface
Sensor, can in real time measure the pressure that screw rod applies in process of the test.Screw support seat is connected in by annular seal space by bolt right
End cap corresponding position, at the nut of bolt gasket seal is laid, and is compressed gasket seal using bolt pretightening and is played sealing
Effect.Nut is connected on screw support seat using screw, using nut inner thread screw rod is screwed in, hand is installed in screw rod right-hand member
Handle.The annular seal space right-hand member cover for assembling is connected in seal cavity by screw, in annular seal space right end cap and annular seal space
Between gasket seal be installed play sealing function.
Tooth bar fixed plate is welded on into the relevant position on test platform support, the welding in tooth bar fixed plate rear and front end is limited
Position baffle plate, makes whole moving assembly move within the specific limits, then welds tooth bar on tooth bar fixed plate, places on tooth bar
Spur gear wheel, cylindrical straight gear wheel and rack is engaged, and is moved using the drive mechanism of rack-and-pinion, on spur gear wheel
Mobile support is installed.Mobile support is moved to relevant position and makes to move support by screw and is connected on screw bolt support.
Relevant position welding motor support frame, is connected torque couplings bracing frame using screw on test platform support
On motor support frame, rotary shaft and torque couplings are connected by second shaft coupling, torque couplings are arranged on into moment of torsion coupling
Clutch upper support seat.The other end of torque couplings connects motor-shaft extending by first shaft coupling, and motor is connected in by screw
Relevant position on motor supporting base.Guarantee that power input module, signal processing component, rotary test part and moving assembly have
Identical centre-height.
When assembling is with water assembly, annular seal space inlet pipeline is connected to annular seal space by one end with externally threaded pvc pipe
On, the annular seal space water inlet pipe other end is connected on the outlet conduit of centrifugal pump.The outlet of centrifugal pump water inlet pipe is connected to centrifugal pump and enters
At mouthful, the import of centrifugal pump water inlet pipe is placed in the sink.The water in tank is delivered in annular seal space by centrifugal pump.Sealing
Chamber outlet pipe one end is connected to the water outlet of annular seal space, and the other end is placed in the sink, realizes recycling for water.Annular seal space
Inlet pipeline is supported by steel tube frame, and annular seal space outlet pipeline is supported by through hole bigger on test platform support, point
The weight of whole pipeline is carried on a shoulder pole, is easy to the stability of pipe fitting.There is the screwed hole for exhaust on annular seal space.
During as being tested based on bionic non-smooth surface frictional resistance under water.Before experiment starts, water is filled in the sink,
Cover cover plate.Meanwhile, the ball valve of annular seal space lower end drainage pipeline is closed, and turn on the bolt of seal cavity upper end.Prepare appropriate
Deal with problems arising from an accident startup water pump, water is transported in seal cavity by aqueduct, the air in cavity is discharged by screwed hole, with
The continuous injection of liquid, when water covers screwed hole, switches off the pump, and bolt is tightened again.Now, the electricity of the other end is opened
Machine, is rotated axle rotation.In process of the test by variable frequency adjustment motor in the case of several groups of different rotating speeds, by under different rotating speeds
Signal value measured by corresponding torque signal coupler, is amplified after filtering that analog signal is defeated by transmitter to signal
Capture card is given, and computer is delivered to by capture card and store respective value in a computer.Complete bionic non-smooth surface
After frictional resistance testing experiment under water environment, turn on ball valve and water is flow back in screw clamp, realize recycling for water, then
The screw on annular seal space right end cap is turned on, mobile moving assembly changes the first test exemplar with different biomimetic features, again
After annular seal space right end cap is connected in seal cavity, start friction resistance of the bionic non-smooth surface next time under water environment
Power is tested.The coefficient of friction of the different bionical test exemplars of comparison.
When bionic non-smooth surface frictional resistance under the conditions of having done impressed pressure is tested, now need not be toward in annular seal space
Water filling.From the corresponding second test exemplar, and hydraulic support is slowly promoted to give the second test exemplar by crank handle
Surface certain pressure, due to the self-lock ability of screw rod, can make sample surface there is constant pressure all the time, and pressure is tried by screw rod
The pressure sensor tested on face is measured, and by torque signal coupler the moment of torsion under the constant-pressure conditions is measured.By under different pressures
Signal value measured by corresponding torque signal coupler, is amplified after filtering that analog signal is defeated by transmitter to signal
Capture card is given, and computer is delivered to by capture card and store respective value in a computer.When the tables for needing replacing different
During the sample exemplar of face structure, the bolt of cavity right-hand member of back-outing is driven by the rack and pinion engagement below moving assembly, will be whole
The wall and device for exerting of body is displaced outwardly, and now changes second and tests exemplar, after the second test exemplar is changed, will be flat
Platform is back moved, then bolt of screwing on, and just can carry out next group has bionic non-smooth surface frictional resistance under the conditions of impressed pressure to survey
Have a try and test.The coefficient of friction of different bionical test exemplars can be compared by the test data of computer recording.
Content described in this specification embodiment is only enumerating for the way of realization to utility model design, and this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, protection domain of the present utility model is also wrapped
Include those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (9)
1. based on bionic non-smooth surface frictional resistance test device under water, including test platform support, the rotation with annular seal space
Transfer to test part, power input module, with water assembly, moving assembly and signal processing component, it is described rotary test part, dynamic
Power input module and all it is arranged on described test platform support with water assembly, described moving assembly and described test
Platform support is affixed；The power input module is connected by first shaft coupling with the power intake of described signal processing component
Connect, the clutch end of the signal processing component passes through rotary shaft one end phase of second shaft coupling and the rotary test part
Connection, the rotary test part other end installs moving assembly；The water inlet pipe with water assembly and the rotary test part
Blasthole pipeline connects, and the outlet pipe with water assembly is connected with the apopore pipeline of described rotary test part, its
It is characterised by：Described rotary test part is including the black box in rotary shaft, rotary shaft, annular seal space component and is placed in close
The test exemplar test suite of envelope chamber component internal, the rotary shaft is arranged on the through hole on annular seal space left end cap, is fallen close
The rotary shaft outer end of the outside of envelope chamber component is equipped with black box, to fall and be provided with examination in rotary shaft the inner of annular seal space component internal
Test exemplar test suite；Described rotary test part has phase with power input module, signal processing component and moving assembly
Same installation center height；
The black box be magnet fluid sealing, including annular permanent magnet, two pieces with permanent magnet matching merge identical
Pole shoe, has teeth groove on every piece of pole shoe inwall；Two pieces of pole shoes, formed between the revolving part and pole shoe and revolving part of relative motion
Gap constitutes magnetic circuit, the magnetic seal being formed on revolving part；Whole black box is placed in axle sleeve, and the axle sleeve leads to
Cross screw to be connected on annular seal space left end cap；Black box or so two ends are placed with respectively adjust pad, and the black box is left
End is placed with bearing holder (housing, cover) and plays a part of axial restraint to black box, and the bearing holder (housing, cover) is connected in the phase on axle sleeve by screw
Answer position；Bearing (ball) cover is connected in relevant position on bearing holder (housing, cover) and plays axial direction to the angular contact ball bearing in rotary shaft by screw
Positioning action, is provided with notch cuttype groove sealing structure on the bearing (ball) cover；
The annular seal space component includes the annular seal space with blasthole and apopore, annular seal space left end cap and annular seal space right end cap,
The screwed hole for exhaust is provided with the annular seal space, the screwed hole is furnished with corresponding sealing bolt；It is annular seal space left end cap, close
Envelope chamber right end cap seals affixed with annular seal space both ends of the surface respectively；The inner face through hole outer ring of the annular seal space left end cap be provided with for
The annular frustum cone structure of thrust ball bearing is laid, thrust ball bearing end cap is arranged on truncated cone-shaped structure end face；Described annular seal space
Right end cap is provided with the unthreaded hole for installing hydraulic support；Whole annular seal space component is arranged on the corresponding portion on test platform support
Position；
The test exemplar test suite includes sample carrier, sample door, shaft end ring, the first test exemplar, the second examination
Exemplar and the hydraulic support for being pressed against the second test sample surface are tested, the test exemplar test suite is except hydraulic support
Rotary shaft inner end is installed in outward；The sample carrier is sleeved on rotary shaft the inner outer wall and by the shaft shoulder and connection keying
Connect；The first test exemplar is enclosed within sample carrier outer wall and affixed therewith, described sample door by shaft end ring and
Rotary shaft inner face is affixed, realizes the axially position of the first test exemplar；The second test exemplar is affixed with sample door；Institute
The hydraulic support stated be slidably connected with described annular seal space right-hand member cover seal and described hydraulic support outer end force end face
It is provided with pressure sensor.
2. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
State moving assembly including screw support seat, screw rod, handle, mobile support, spur gear wheel, for what is engaged with spur gear wheel
Tooth bar and tooth bar fixed plate, the screw support seat is connected in annular seal space right-hand member cover outer wall by bolt, described screw rod and institute
The screw support seat stated is spirally connected, and described screw rod is inner corresponding with pressure sensor position, and screw rod right-hand member is connected handle；Institute
The mobile frame upper stated is connected by bolt with described screw support seat, and the mobile frame bottom is provided with cylindrical straight gear
Wheel；The tooth bar is welded in and pre-fixes in the tooth bar fixed plate of test platform support relevant position, tooth bar fixed plate or so two ends
It is welded with postive stop baffle.
3. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
Power input module is stated including motor, first shaft coupling and motor support frame, motor is connected on motor support frame by bolt,
Motor support frame is arranged on the relevant position on test platform support；The output shaft of motor is by first shaft coupling and described letter
The connection of number process assembly.
4. as claimed in claim 3 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
Signal processing component is stated including torque signal coupler, torque signal coupler support and second shaft coupling, the torque signal
Coupler is connected on torque signal coupler support by screw, and torque signal coupler support is connected in motor by screw
Relevant position on bracing frame；A torque signal coupler left side connects first shaft coupling, and the right side connects second shaft coupling.
5. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
That what is stated includes tank, centrifugal pump, water inlet pipe and outlet pipe with water assembly, and the water inlet of described centrifugal pump introduces institute by pipeline
In the tank stated, the delivery port of described centrifugal pump is connected with the water inlet end of described water inlet pipe, the water outlet of described water inlet pipe
End is connected with the blasthole of described annular seal space, and the described water inlet end of outlet pipe is connected with the apopore of annular seal space, described
The water side of outlet pipe is introduced in described tank, realizes the circulation of test water；Described outlet pipe is provided with ball valve；It is described
Annular seal space inlet pipeline is supported using steel tube frame.
6. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
The hydraulic support stated include press surface for being pressed against on the second test exemplar end face, at least one be used for and annular seal space right-hand member
The lid depression bar being slidably connected and the stress surface contacted for the force section with moving assembly, described depression bar is right through annular seal space
Unthreaded hole on end cap, and described press surface is affixed with depression bar the inner, and stress surface is affixed with depression bar outer end so that described presses
Pressure surface is always positioned at described annular seal space inner chamber, and stress surface is located at outside described annular seal space, realizes test bracket and annular seal space
Right-hand member cover seal is slidably connected.
7. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
State axle sleeve to make using the aluminium alloy of non-magnet material.
8. as claimed in claim 3 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
The first shaft coupling and second shaft coupling stated is elastic dowel pin shaft coupling.
9. as claimed in claim 1 based on bionic non-smooth surface frictional resistance test device under water, it is characterised in that：Institute
State the first test exemplar and the second test exemplar is polytetrafluoroethylmaterial material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620848031.7U CN206095481U (en) | 2016-08-04 | 2016-08-04 | Bionical nonsmooth surface frictional resistance testing arrangement based on under water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620848031.7U CN206095481U (en) | 2016-08-04 | 2016-08-04 | Bionical nonsmooth surface frictional resistance testing arrangement based on under water |
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| CN206095481U true CN206095481U (en) | 2017-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525307A (en) * | 2016-08-04 | 2017-03-22 | 浙江工业大学 | Bionic non-smooth surface friction resistance testing device based on underwater |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525307A (en) * | 2016-08-04 | 2017-03-22 | 浙江工业大学 | Bionic non-smooth surface friction resistance testing device based on underwater |
| CN106525307B (en) * | 2016-08-04 | 2022-05-24 | 浙江工业大学 | Bionic non-smooth surface friction resistance testing device based on underwater |
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Granted publication date: 20170412 Termination date: 20190804 |