CN105424319A - Bionics-based underwater jet surface drag reduction test device - Google Patents
Bionics-based underwater jet surface drag reduction test device Download PDFInfo
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- CN105424319A CN105424319A CN201511015655.7A CN201511015655A CN105424319A CN 105424319 A CN105424319 A CN 105424319A CN 201511015655 A CN201511015655 A CN 201511015655A CN 105424319 A CN105424319 A CN 105424319A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a bionics-based underwater jet surface drag reduction test device, which comprises a jet part, a power input assembly, a water distribution assembly, a moving assembly, a magnetic fluid sealing assembly and a signal processing assembly, wherein the motor of the power input assembly is connected with the input shaft of the jet part via a first coupler; the output shaft of the jet part is connected with a torque signal coupler of the signal processing assembly via a second coupler; the signal processing assembly and the jet part are arranged on the moving assembly; the water inlet pipe of the water distribution assembly is connected with a water inlet pipeline of the jet part; the water outlet pipe of the water distribution assembly is communicated with the water outlet pipeline of the jet part; and the jet part is sealed via an axial sealing assembly. The bionics-based underwater jet surface drag reduction test device has the beneficial effects that the jet surface drag reduction effect test and the non-smooth surface structure drag reduction effect test can be realized, and when the jet surface structure drag reduction effect evaluation is carried out, and a test sample can be processed into a jet hole structure with a different aperture shape, a different aperture size, a different arrangement form and a different inclination angle.
Description
Technical field
The present invention relates to a kind of based on bionical submerged jet surface drag reduction test device.
Background technology
The achievement in research of current drag reduction technology both domestic and external mainly contains groove drag reduction method, soft wall approach, bubble method, Wall Vibration drag reduction method, coating drag reduction method, superpolymer Drag Reduction With Additives method, associating drag reduction and bionical jet surface drag reduction etc.For the huge meaning of drag reduction, be all devoted to both at home and abroad to develop drag reduction technology that is efficient, environmental protection, and bionical jet surface drag reduction technology is one of hot issue of research both at home and abroad always.Its drag-reduction effect is obvious, and the course of work is environment friendly and pollution-free.For diversified drag reduction method, need a kind of proving installation and the sample surface frictional resistance under the method is tested, to assess the drag-reduction effect of the method, then compare the quality of resistance reducing performance.
The test unit great majority of the test of traditional fluid friction resistance adopt water hole, wind-tunnel, the experimental facilitiess such as pond, not only volume is large, cost is high to adopt above-mentioned experimental technique means, and require higher to experimental enviroment and need the expense of at substantial, thus all will being subject to certain limitation and restriction in all many-sides.Therefore, the method for service test is carried out determining quantifier elimination to bionical jet surface technology and is just seemed important.
So the design of bionical jet flow drag reduction testing experiment platform should meet following 3 designing requirements.
(1) should to have volume little for bionical jet flow drag reduction testing experiment platform, and structure is simple, cost is low, the feature that test capability is strong, can do jet surface drag reduction testing experiment can do again non-smooth surface drag reduction testing experiment by different test exemplars.Be arranged on test exemplar part on bionical jet flow drag reduction testing experiment platform loads want can according to test need change at any time, and convenient disassembly.
(2) the data acquisition hardware system requirements simplicity of design of bionical jet flow drag reduction testing experiment platform, cost are low, and be convenient to user's operation and maintenance, signal wire is drawn convenient, and the signal of output directly, accurately.The interface of data acquisition software system wants succinct directly perceived, can complete the functions such as the input setting of parameter, the Real-time Collection of data, display and storage.
(3) there is systematic error and stochastic error in system, will carry out system compensation before the test to system, to ensure that system remains in rational error range.In test because be difficult to keep absolute stability, and with inevitable noise, so the data collected have fluctuation, effective data processing method therefore should be adopted to obtain comparatively satisfied data result.
The device that test unit can be tested as jet surface and non-smooth surface drag reduction.When as jet flow drag reduction proving installation, the moment of torsion measured on testpieces is adopted to measure the test exemplar drag size suffered when jet.
Therefore, the small-sized resistance measurement device of cheap, the stable performance of R & D design one has positive effect for the research of bionic surface problem.
Summary of the invention
The present invention is directed to above-mentioned problem, propose a kind of test unit that bionical submerged jet surface is provided, carry out the measure of merit of the test of jet surface drag-reduction effect and structured non-smooth surface drag reduction by this device simultaneously, require that test unit structure is simple, processing ease, test is accurately based on bionical submerged jet surface drag reduction test device.
Of the present invention based on bionical submerged jet surface drag reduction test device, it is characterized in that: comprise fluidic component, power input module, water distribution assembly, moving assembly, magnet fluid sealing assembly and signal processing component, the motor of described power input module is connected with the input shaft of described fluidic component by the first shaft coupling, the output shaft of described fluidic component is connected with the torque signal coupling mechanism of described signal processing component by the second shaft coupling, and described signal processing component, described fluidic component are all arranged on described moving assembly; The water inlet pipe of described water distribution assembly is connected with the water inlet tube of described fluidic component, the rising pipe of described water distribution assembly and the water delivering orifice pipeline communication of described fluidic component; Described fluidic component is by magnet fluid sealing component sealing;
Described fluidic component comprises sealing bore assembly, outer barrel component, interior cartridge module, input shaft and output shaft, and described sealing bore assembly, described outer barrel component and described interior cartridge module are coaxially arranged the telescoping structure of formation three layers successively from outside to inside; The power intake of described input shaft is connected with the clutch end of described power input module, magnet fluid sealing assembly is housed on the right side of described outer barrel component, and described outer barrel component is by corresponding magnet fluid sealing assembly and described sealing bore component sealing, described inner core component sealing is contained in the clutch end of sealing bore right end cap of described input shaft through sealing bore assembly, and interior cartridge module described in ensureing and described input shaft run-in synchronism; The power intake of described output shaft and the urceolus left end cap of described outer barrel component are tightly connected, and the clutch end of described output shaft is connected with described signal processing component by the second shaft coupling;
Described water distribution assembly comprises tank, centrifugal pump, water inlet pipe and rising pipe, the water inlet of described centrifugal pump introduced by pipeline described in tank in, the water delivering orifice of described centrifugal pump is connected with the water inlet end of described water inlet pipe, the water side of described water inlet pipe is connected with the blasthole of described sealing bore assembly, the water inlet end of described rising pipe is communicated with the apopore of sealing bore assembly, in the tank described in the introducing of water side of described rising pipe, realize the circulation of test water; Described water inlet pipe is arranged flowmeter and tensimeter, described rising pipe is provided with ball valve;
Described moving assembly comprises bottom bracket, V-type rail and V-type rail mobile platform, described V-type rail level is arranged on the top of described support, described V-type rail mobile platform and described V-type rail are slidably connected, described V-type rail mobile platform installs described signal processing component, described fluidic component, described Power output assembly are installed on described bottom bracket, and signal processing component, described fluidic component and the described Power output assembly described in keeping is on same axis;
Described signal processing component comprises torque signal coupler base, keyway plate, torque signal coupling mechanism and signal processor, described torque signal coupler base is arranged on described V-type rail mobile platform, the described keyway plate described in the installation of torque signal coupler base top, one end of described torque signal coupling mechanism leads to and is arranged on described keyway plate, and the other end is connected with the clutch end of described output shaft by the second shaft coupling; The signal output part of described torque signal coupling mechanism is connected with outside signal processor signal.
Described sealing bore assembly comprises with the sealing bore of blasthole, sealing bore left end cap and sealing bore right end cap, and described sealing bore left end cap, sealing bore right end cap seal the two ends being arranged on described sealing bore respectively; Described outer barrel component is arranged on the inside of described sealing bore, described outer barrel component comprises tubular test exemplar, urceolus left end cap and urceolus right end cap, described urceolus left end cap and described urceolus right end cap seal the two ends being arranged on described test exemplar respectively, and be furnished with magnet fluid sealing assembly outside described urceolus right end cap, described urceolus right end cap realizes the sealing between urceolus right end cap and sealing bore right end cap round platform place by corresponding magnet fluid sealing assembly; Described interior cartridge module comprises inner core, inner core left end cap and inner core right end cap, wherein said inner core left end cap and the sealing of described inner core right end cap are arranged on the two ends of described inner core, described inner core right end cap and the output terminal of described input shaft are spirally connected, and keep inner core right end cap, described urceolus right end cap and described sealing bore right end cap coaxial.
Described sealing bore upper wall is provided with the first threaded hole for being vented, and the lower wall of described sealing bore is provided with the second threaded hole for draining, and the first described threaded hole and the second threaded hole are all furnished with corresponding sealing bolt; The screw boss connecting water-supply-pipe is welded with above the blasthole of described sealing bore.
Described magnet fluid sealing assembly comprises annular permanent magnet, two pieces of identical pole shoes matched with permanent magnet, and every block pole shoe inwall or outer wall have teeth groove; Two pieces of pole shoes, the revolving part of formation relative motion and the gaps between pole shoe and revolving part form magnetic circuit, form the magnetic seal be sealed on revolving part.
The outside of described output shaft is socketed left connecting cylinder, one end of left connecting cylinder by bolt and described sealing bore left end cap affixed, and keep left connecting cylinder and sealing bore left end cap coaxial; The other end of left connecting cylinder is equipped with left connecting cylinder end cap, a set of described magnet fluid sealing assembly is furnished with between described left connecting cylinder and described output shaft, the wherein endoporus of left connecting cylinder and two pieces of pole shoe transition fit of magnet fluid sealing assembly, two pieces of pole shoes, output shaft and the gaps between pole shoe and output shaft form magnetic circuit, form the magnetic seal be sealed on output shaft.
Adjustment pad is accompanied between described left connecting cylinder and described sealing bore left end cap, and the mounting hole of described sealing bore left end cap is embedded with water-sealed bearing, described left connecting cylinder end caps is furnished with deep groove ball bearing, and the two ends of described output shaft are contained on corresponding deep groove ball bearing and described water-sealed bearing.
The outside of described input shaft is socketed right connecting cylinder, wherein one end of right connecting cylinder and described sealing bore right end cap affixed, the other end is equipped with corresponding bearing air cover; The felt collar end cap for sealing is accompanied between described right connecting cylinder and described sealing bore right end cap; The mounting hole place of described sealing bore right end cap is embedded with water-sealed bearing, and the gap between described right connecting cylinder and described input shaft is furnished with deep groove ball bearing, and the two ends of described input shaft are contained on corresponding water-sealed bearing and deep groove ball bearing; The input end of described input shaft is furnished with the felt collar for sealing, and felt collar and input shaft are interference fit.
The inside surface of described sealing bore right end cap is provided with axial round platform, another set of magnet fluid sealing assembly is furnished with between the round platform of described urceolus right end cap and described sealing bore right end cap, the wherein endoporus of urceolus right end cap and two pieces of pole shoe transition fit of corresponding magnet fluid sealing assembly, two pieces of pole shoes, round platform and the gaps between pole shoe and round platform form magnetic circuit, form the magnetic seal be sealed on round platform.
The first described shaft coupling is that elasticity nullifies shaft coupling, and the second described shaft coupling is blossom type shaft coupling.
Described left connecting cylinder adopts non-magnet material aluminium alloy to make.
The end of described V-type rail is furnished with positive stop.
Magnet fluid sealing assembly in the present invention is magnet fluid sealing, by annular permanent magnet (N-S), the magnetic circuit that pole shoe and turning axle are formed, under the magnetic fields that magnet produces, the magnetic fluid be placed between axle and gap, pole shoe top is concentrated, make it form the "O" ring of, gap passage is blocked the object reaching sealing.Magnet fluid sealing, because be the sealing that liquid is formed, as long as in the pressure differential range of permission, can realize zero leakage, and be non-contacting seal, in the friction of seal element and turning axle, therefore can not can improve the degree of accuracy of torque measurement, to system test result without obvious interference.Left connecting cylinder adopts non-magnet material aluminium alloy to make, its endoporus and two pieces of pole shoe transition fit.Input shaft place adopts felt-ring seal, and felt collar end cap is connected on sealing bore right end cap by bolt, and for anti-fluid is leaked, felt collar and input shaft are interference fit.Magnet fluid sealing is adopted between test exemplar right end cap and sealing bore right end cap; Centrifugal pump extracting liquid from tank of water distribution assembly is sent in water inlet pipe by pipe, and by pipe being installed the flow velocity of water in valve, tensimeter and flowmeter control tube; This test design V-type rail platform is for testing the replacing of exemplar.On moving platform device, sealing bore left end cap is directly welded on V-type rail by floor.After finishing test, first discharge water unnecessary in sealing bore, after water is drained at every turn, turn on the screw on sealing bore left end cap, V-type rail is moved outward together with the device on guide rail, when moving to suitable position, V-type rail is fixed, change the test exemplar on urceolus again, after more finishing changing test exemplar, whole device is moved forward, after fixing, connect screw, again start to test next time.
The TT&C software part of the signal processor of this Test Data Acquisition System is write by LabVIEW.After in motor is driven by input shaft, cartridge module rotates, interior cartridge module is inconjunction with fluid and rotates together, and test exemplar is subject to the frictional resistance of fluid, and frictional resistance changes into moment of torsion by output shaft measured by torque signal coupling mechanism.The simulating signal that torque signal coupling mechanism collects is through the process of the conversion of transmitter, amplification and filtering, the signal collected by sensor is converted to the simulating signal that can be connected with data acquisition module, simulating signal carries out A/D conversion through data acquisition module, change the digital signal that can be stored by signal processor into, be stored in signal processor.
The fluid media (medium) that this test unit adopts is water, environment friendly and pollution-free.In order to make whole test unit run more efficiently, sealing bore being opened individual threaded hole and being used for coupling bolt.Water is extracted out by centrifugal pump one end, and by certain pressure by hydraulic pressure oral siphon.Around here, the entrance by flowmeter flows into by high-velocity flow, and flows out from its outlet.The flow velocity of water when the effect of flowmeter is used to calculate jet, in device experiment process with different jet velocity jet and the process of comparative analysis provides more reliable foundation.Then, the water entering sealing bore can enter in cavity by the through hole on test exemplar, air now in cavity can be discharged along with the threaded hole on sealing bore, to screw on when water did not have threaded hole bolt, now open the PVC ball valve on drainpipe, water in cavity by the through hole backflow return flume on end cover, can complete the jet process of whole device.This process medium fluid will be back to tank via device drain outlet, complete recycling of water, economize on resources.When test completes, unnecessary water discharged by the bolt can turning on sealing bore lower end.
The invention has the beneficial effects as follows: realize the test of jet surface drag-reduction effect and structured non-smooth surface drag-reduction effect is tested, when doing the assessment of jet surface structure drag-reduction effect, test exemplar can process the jet orifice structure at different pore size shape, pore size, arrangement mode, angle of inclination; When doing the assessment of structured non-smooth surface drag-reduction effect, test sample surface can also process different ridge-like structure, as bowl configurations, bulge-structure, square type structure etc.; Or at test sample surface applying coating.By the torque signal value of data acquisition system in different tests exemplar situation, carry out comparing, obtain the drag-reduction effect of different surfaces structure, the property of reduction drag of research structured non-smooth surface and jet surface structure.Data acquisition system (DAS) structure is simple, processing ease, and test accurately.After exemplar test when the test of certain situation, only need change test exemplar, this test design V-type rail platform for test exemplar with changing, this Renewal process simply, processing ease, save time, reduce use cost; Water supply part, can the effluxvelocity of Control experiment model accurately by coordinating the components and parts such as centrifugal pump, PVC ball valve, tensimeter, turbo flow meter, simulates different effluxvelocity environment; Adopt magnet fluid sealing in back rotation sealing place, there is its life-span length, without the friction of wearing and tearing, zero leakage can be realized, seal element and turning axle can not be produced, therefore can improve the degree of accuracy of torque measurement.
Accompanying drawing explanation
Fig. 1 is structural drawing of the present invention.
Fig. 2 is vertical view of the present invention.
Fig. 3 is side view of the present invention.
Fig. 4 is the structural drawing of fluidic component of the present invention.
Fig. 5 is the vertical view of fluidic component of the present invention.
Fig. 6 is the side view of fluidic component of the present invention.
Fig. 7 is the A place enlarged drawing of Fig. 4.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing
With reference to accompanying drawing:
Embodiment 1 is of the present invention based on bionical submerged jet surface drag reduction test device, comprise fluidic component 1, power input module 2, water distribution assembly 3, moving assembly 4, magnet fluid sealing assembly 5 and signal processing component 6, the motor of described power input module 2 is connected with the input shaft of described fluidic component 1 by the first shaft coupling 7, the output shaft of described fluidic component 1 is connected with the torque signal coupling mechanism of described signal processing component 6 by the second shaft coupling 8, described signal processing component 6, described fluidic component 1 is all arranged on described moving assembly 4, the water inlet pipe of described water distribution assembly 3 is connected with the water inlet tube of described fluidic component 1, the rising pipe of described water distribution assembly 3 and the water delivering orifice pipeline communication of described fluidic component 1, described fluidic component 1 is sealed by magnet fluid sealing assembly 5,
Described fluidic component 1 comprises sealing bore assembly 11, outer barrel component 12, interior cartridge module 13, input shaft 14 and output shaft 15, and described sealing bore assembly 11, described outer barrel component 12 and described interior cartridge module 13 are coaxially arranged the telescoping structure of formation three layers successively from outside to inside; The power intake of described input shaft 14 is connected with the clutch end of described power input module 2, on the right side of described outer barrel component 12, magnet fluid sealing assembly 5 is housed, and described outer barrel component 12 is sealed with described sealing bore assembly 11 by corresponding magnet fluid sealing assembly 5, described interior cartridge module 13 sealing is contained in the clutch end of described input shaft 14 through the sealing bore right end cap of sealing bore assembly 11, and interior cartridge module 13 described in ensureing and described input shaft 14 run-in synchronism; The power intake of described output shaft 15 and the urceolus left end cap of described outer barrel component 12 are tightly connected, and the clutch end of described output shaft 15 is connected with described signal processing component 6 by the second shaft coupling 8;
Described water distribution assembly 3 comprises tank 31, centrifugal pump 32, water inlet pipe 33 and rising pipe 34, the water inlet of described centrifugal pump 31 introduced by pipeline described in tank 31 in, the water delivering orifice of described centrifugal pump 32 is connected with the water inlet end of described water inlet pipe 33, the water side of described water inlet pipe 33 is connected with the blasthole of described sealing bore assembly 11, the water inlet end of described rising pipe 34 is communicated with the apopore of sealing bore assembly 11, in the tank 31 described in the introducing of water side of described rising pipe 34, realize the circulation of test water; Described water inlet pipe 33 is arranged flowmeter 331, tensimeter 332 and first controls ball valve 333, described rising pipe 34 is provided with the second control ball valve 341;
Described moving assembly 4 comprises bottom bracket 41, V-type rail 42 and V-type rail mobile platform 43, described V-type rail 41 horizontal welding is connected on the top of described support 41, described V-type rail mobile platform 43 is slidably connected with described V-type rail 42, described V-type rail mobile platform 43 installs described signal processing component 6, described fluidic component 1, described Power output assembly 2 are installed on described bottom bracket 41, and signal processing component 6, described fluidic component 1 and the described Power output assembly 2 described in keeping is on same axis;
Described signal processing component 6 comprises torque signal coupler base 61, keyway plate 62, torque signal coupling mechanism 63 and signal processor, described torque signal coupler base 61 is arranged on described V-type rail mobile platform 43, the described keyway plate 62 described in the installation of torque signal coupler base 61 top, one end of described torque signal coupling mechanism 63 leads to and is arranged on described keyway plate 62, and the other end is connected with the clutch end of described output shaft 15 by the second shaft coupling 8; The signal output part of described torque signal coupling mechanism 63 is connected with outside signal processor signal.
Described sealing bore assembly 11 comprises with the sealing bore 111 of blasthole, sealing bore left end cap 112 and sealing bore right end cap 113, and described sealing bore left end cap 112, sealing bore right end cap 113 seal the two ends being arranged on described sealing bore 111 respectively; Described outer barrel component 12 is arranged on the inside of described sealing bore 111, described outer barrel component 12 comprises tubular test exemplar 121, urceolus left end cap 122 and urceolus right end cap 123, described urceolus left end cap 122 and described urceolus right end cap 123 seal the two ends being arranged on described test exemplar 121 respectively, and be furnished with magnet fluid sealing assembly 5 outside described urceolus right end cap 123, described urceolus right end cap 123 realizes the sealing between urceolus right end cap 123 and sealing bore right end cap 113 round platform place by corresponding magnet fluid sealing assembly 5; Described interior cartridge module 13 comprises inner core 131, inner core left end cap 132 and inner core right end cap 133, wherein said inner core left end cap 132 and the sealing of described inner core right end cap 133 are arranged on the two ends of described inner core 131, described inner core right end cap 133 is spirally connected with the output terminal of described input shaft 14, keeps inner core right end cap 133, described urceolus right end cap 123 and described sealing bore right end cap 113 coaxial.
Described sealing bore 111 upper wall is provided with the first threaded hole 1111 for being vented, and the lower wall of described sealing bore is provided with the second threaded hole 1112 for draining, and the first described threaded hole 1111 and the second threaded hole 1112 are all furnished with corresponding sealing bolt; The screw boss 1113 connecting water-supply-pipe is welded with above the blasthole of described sealing bore 111.
Described magnet fluid sealing assembly 5 comprises the identical pole shoe 52 that annular permanent magnet 51, two pieces matches with permanent magnet, and every block pole shoe 52 inwall or outer wall have teeth groove; Two pieces of pole shoes 52, the revolving part of formation relative motion and the gaps between pole shoe and revolving part form magnetic circuit, form the magnetic seal be sealed on revolving part.
The outside of described output shaft 15 is socketed left connecting cylinder 151, one end of left connecting cylinder 151 by bolt and described sealing bore left end cap 112 affixed, and keep left connecting cylinder 151 and sealing bore left end cap 112 coaxial; The other end of left connecting cylinder 151 is equipped with left connecting cylinder end cap 152, a set of described magnet fluid sealing assembly 5 is furnished with between gap between described left connecting cylinder 151 and described output shaft 14, the wherein endoporus of left connecting cylinder 151 and two pieces of pole shoe 52 transition fit of magnet fluid sealing assembly 5, two pieces of pole shoes 52, form magnetic circuit as the output shaft of revolving part and the gap between pole shoe and output shaft, form the magnetic seal be sealed on output shaft.
Accompany between described left connecting cylinder 151 and described sealing bore left end cap 112 and adjust pad 114, and the mounting hole of described sealing bore left end cap 112 is embedded with water-sealed bearing 1121, described left connecting cylinder end cap 152 place is furnished with deep groove ball bearing 153, and the two ends of described output shaft 15 are contained on corresponding deep groove ball bearing 153 and described water-sealed bearing 1121.
The outside of described input shaft 14 is socketed right connecting cylinder 141, wherein one end of right connecting cylinder 141 and described sealing bore right end cap 113 affixed, the other end is equipped with corresponding bearing air cover 143; The felt collar end cap 144 for sealing is accompanied between described right connecting cylinder 141 and described sealing bore right end cap 142; The mounting hole place of described sealing bore right end cap 142 is embedded with water-sealed bearing 145, gap between described right connecting cylinder 141 and described input shaft 14 is furnished with deep groove ball bearing 146, and the two ends of described input shaft 14 are contained on corresponding water-sealed bearing 145 and deep groove ball bearing 146; The input end of described input shaft 14 is furnished with the felt collar 147 for sealing, and felt collar 147 and input shaft 14 are interference fit.
The inside surface of described sealing bore right end cap 113 is provided with axial round platform 1131, another set of magnet fluid sealing assembly 5 is furnished with between the round platform 1131 of described urceolus right end cap 123 and described sealing bore right end cap 113, the wherein endoporus of right connecting cylinder 141 and two pieces of pole shoe 52 transition fit of corresponding magnet fluid sealing assembly 5, two pieces of pole shoes 52, round platform 1131 and the gaps between pole shoe and round platform form magnetic circuit, form the magnetic seal be sealed on round platform 1131.
The first described shaft coupling 7 is elasticity cancellation shaft coupling, and the second described shaft coupling 8 is blossom type shaft coupling.
Described left connecting cylinder 151 adopts non-magnet material aluminium alloy to make.
The end of described V-type rail 42 is furnished with positive stop 411.
Magnet fluid sealing assembly in the present invention is magnet fluid sealing, by annular permanent magnet (N-S), the magnetic circuit that pole shoe and turning axle are formed, under the magnetic fields that magnet produces, the magnetic fluid be placed between axle and gap, pole shoe top is concentrated, make it form the "O" ring of, gap passage is blocked the object reaching sealing.Magnet fluid sealing, because be the sealing that liquid is formed, as long as in the pressure differential range of permission, can realize zero leakage, and be non-contacting seal, in the friction of seal element and turning axle, therefore can not can improve the degree of accuracy of torque measurement, to system test result without obvious interference.Left connecting cylinder adopts non-magnet material aluminium alloy to make, its endoporus and two pieces of pole shoe transition fit.Input shaft place adopts felt-ring seal, and felt collar end cap is connected on sealing bore right end cap by bolt, and for anti-fluid is leaked, felt collar and input shaft are interference fit.Magnet fluid sealing is adopted between test exemplar right end cap and sealing bore right end cap; Centrifugal pump extracting liquid from tank of water distribution assembly is sent in water inlet pipe by pipe, and by pipe being installed the flow velocity of water in valve, tensimeter and flowmeter control tube; This test design V-type rail platform is for testing the replacing of exemplar.On moving platform device, sealing bore left end cap is directly welded on V-type rail by floor.After finishing test, first discharge water unnecessary in sealing bore, after water is drained at every turn, turn on the screw on sealing bore left end cap, V-type rail is moved outward together with the device on guide rail, when moving to suitable position, V-type rail is fixed, change the test exemplar on urceolus again, after more finishing changing test exemplar, whole device is moved forward, after fixing, connect screw, again start to test next time.
The TT&C software of the signal processor of this Test Data Acquisition System is write by LabVIEW.After in motor is driven by input shaft, cartridge module rotates, interior cartridge module is inconjunction with fluid and rotates together, and test exemplar is subject to the frictional resistance of fluid, and frictional resistance changes into moment of torsion by output shaft measured by torque signal coupling mechanism.The simulating signal that torque signal coupling mechanism collects is through the process of the conversion of transmitter, amplification and filtering, the signal collected by sensor is converted to the simulating signal that can be connected with data acquisition module, simulating signal carries out A/D conversion through data acquisition module, change the digital signal that can be stored by signal processor into, be stored in signal processor.
The fluid media (medium) that this test unit adopts is water, environment friendly and pollution-free.In order to make whole test unit run more efficiently, sealing bore being opened individual threaded hole and being used for coupling bolt.Water is extracted out by centrifugal pump one end, and by certain pressure by hydraulic pressure oral siphon.Around here, the entrance by flowmeter flows into by high-velocity flow, and flows out from its outlet.The flow velocity of water when the effect of flowmeter is used to calculate jet, in device experiment process with different jet velocity jet and the process of comparative analysis provides more reliable foundation.Then, the water entering sealing bore can enter in cavity by the through hole on test exemplar, air now in cavity can be discharged along with the threaded hole on sealing bore, to screw on when water did not have threaded hole bolt, now open the PVC ball valve on drainpipe, water in cavity by the through hole backflow return flume on end cover, can complete the jet process of whole device.This process medium fluid will be back to tank via device drain outlet, complete recycling of water, economize on resources.When test completes, unnecessary water discharged by the bolt can turning on sealing bore lower end.
Installation process: the installation of fluidic component: adjusting pad sheet is loaded urceolus right end cap, turn left from the right side again and a set of magnet fluid sealing assembly matched with urceolus right end cap, circlip for hole is loaded the axial location as magnet fluid sealing parts on urceolus right end cap.The object arranging device for sealing magnetic fluid herein reduces the leakage of liquid to outer barrel component inner chamber body, improves the accuracy of test.Be inserted in by gasket seal on urceolus left end cap and urceolus right end cap respectively, urceolus left end cap and urceolus right end cap are connected in by bolt and test two ends, exemplar left and right.Output shaft by screw threads for fastening on urceolus left end cap.Water-sealed bearing is arranged on sealing bore left end cap correspondence position, the output shaft system worked good combination is turned left from the right side loading by sealing bore left end cap, axial restraint is carried out to bearing.
Adjustment pad, magnet fluid sealing parts, adjustment pad is loaded successively in left connecting cylinder; By screw, left connecting cylinder end cap is connected on left connecting cylinder; Again this part connecting is inserted in from the left end of output shaft, is connected by screw on sealing bore left end cap.The left end of rolling bearing from output shaft is loaded, bearing (ball) cover to be fixed on left connecting cylinder end cap thus the axial location realized rolling bearing by screw.
According to the installation method that combination place of output shaft system is similar, water-sealed bearing is arranged on the relevant position of sealing bore right end cap, loading input shaft of turning left from the right side, utilizes the axial location of shaft shoulder realization to water-sealed bearing.Gasket seal is respectively charged on inner core left end cap and inner core right end cap, is connected on inner core respectively by screw.In order to alleviate the pressure of interior cartridge module to output shaft end, inner core selects PVC material, and interior cartridge module is hollow, and the gasket seal on inner core left end cap and inner core right end cap prevents the water in cavity from leaking into interior cartridge module.Cartridge module in combining is realized being connected by the screw thread on inner core right end cap and input shaft.Input shaft adopts felt collar seal, felt-ring seal original paper felt collar end cap is loaded the relevant position of input shaft, righter connecting cylinder is inserted on input shaft, by screw, right connecting cylinder and felt collar end cap are fixed on sealing bore right end cap.Rolling bearing is turned left from the right side and loads input shaft.The bearing (ball) cover that felt collar is housed is connected by screw on right connecting cylinder, realizes the axial restraint to bearing.
Gasket seal is loaded in the corresponding position of the combination of output shaft system and the combination of input shaft system.The combination of output shaft system being loaded from left to right relevant position on sealing bore is connected by screw fixing again; The combination of input shaft system is turned left from the right side and loads relevant position sealing bore and be connected and fixed by screw.
After the assembling completing fluidic component.Fluidic component is welded on test platform by floor, the stability of the warranty test device course of work.The shaft extension of frequency modulation motor is nullified shaft coupling with input shaft by elasticity and is connected.For ensureing installation accuracy, guarantee that the shaft extension of motor and input shaft are in same level position, frequency modulation motor is arranged on test platform by motor support base.
Torque signal coupling mechanism one end is fixed on keyway plate by key, and the other end is connected on output shaft by blossom type shaft coupling, using the numerical value measured by torque signal coupling mechanism as test figure, and gives record.Simultaneously by the numerical value that records suffered by torque signal coupling mechanism stored in computer, the torque data that different test exemplars collects is different, so learn according to different torque signals the resistance situation that test exemplar is subject to and then calculate drag reducing efficiency.
When assembling jet feed system, screw boss is welded in corresponding position on sealing bore, jet inlet pipeline is connected in screw boss by the externally threaded pvc pipe of an end band.The jet water inlet pipe other end is connected on the outlet conduit of centrifugal pump, is delivered in sealing bore by the water in tank by centrifugal pump.Jet rising pipe one end connects the water outlet on sealing bore right end cap, and the other end is placed among tank.Motor support base having the hole more bigger than jet rising pipe for laying jet rising pipe, sharing the weight of jet outlet conduit, being convenient to the stability of overall pipe fitting.Sealed cylinder there are the upper screwed hole for being vented and the lower threaded hole for draining.As shown in Figure 7.Flowmeter, tensimeter, PVC ball valve are installed on jet oral siphon respectively simultaneously, PVC ball valve is installed on jet rising pipe, jet orifice jet flow size can be calculated by the data reading jet oral siphon flowmeter, by jet water inlet pipe and jet rising pipe throughput ratio comparatively, can quantize fluidic system leakage rate, be regulated the size of piping flow by the PVC ball valve on fluid conduit.Owing to being provided with the parts such as flowmeter, tensimeter on the pipeline of jet feed system, make the heavy burden of pipeline entirety larger.Have bracing frame at the medium design of tensimeter and flowmeter, bracing frame will share the weight of whole jet water inlet pipe pipeline, and bracing frame is bolted on the relevant position of test platform.
The principle of work of jet feed system is: first tighten the PVC ball valve on drainpipe, turn on the bolt on sealing bore, by filled with water in tank, is extracted out by water by centrifugal pump one end, and by certain pressure by hydraulic pressure oral siphon.Around here, the entrance by flowmeter flows into by high-velocity flow, and flows out from its outlet.The flow velocity of water when the effect of flowmeter is used to calculate jet, in device experiment process with different jet velocity jet and the process of comparative analysis provides more reliable foundation.Then, the water entered in sealed cylinder can enter in cavity by the through hole on test exemplar, air now in sealed cylinder can be discharged along with the threaded hole on sealing bore, to screw on when water did not have threaded hole bolt, now open the PVC ball valve on drainpipe, water in cavity by the through hole backflow return flume on sealing bore right end cap, can complete the jet process of whole device.This process medium fluid will be back to tank via device drain outlet, complete recycling of water, economize on resources.When test completes, unnecessary water discharged by the bolt can turning on sealing bore lower end.
V-type rail mobile platform is primarily of signal coupler pedestal, V-type rail platform, V-type rail, postive stop baffle composition.Torque signal coupling mechanism and keyway plate combined, by key to torque signal coupling mechanism carry out circumference fix.Torque signal coupling mechanism is connected by screw on keyway plate, and keyway plate is connected by screw on torque signal coupler base.Torque signal coupler base is connected by screw on V-type rail platform, and the sealing bore left end cap in fluidic component is welded on V-type rail platform by floor 64.V-type rail platform is enclosed within V-type rail, utilizes tightening and loosening the movement realizing V-type rail platform of bolt.Wherein V-type rail is directly welded in relevant position on testing table.Postive stop baffle is fixed by screws on testing table and plays spacing effect.
The principle of work of V-type rail mobile platform is as follows: after finishing test at every turn, first discharge water unnecessary in sealing bore, after water is drained, turn on the screw on sealing bore left end cap, unclamp the bolt on V-type rail platform, device on V-type rail platform is moved together outward, when moving to suitable position, V-type rail platform is fixed by the bolt tightened on V-type rail platform, then changes the test exemplar on urceolus, after more finishing changing test exemplar, whole device is moved forward, after fixing, connect screw, again start to test next time.
When testing as structured non-smooth surface, do the control test of the test exemplar of smooth surface structure test exemplar (test exemplar arranges some limberss) and several groups of required structured non-smooth surface respectively.According to assembling process, test unit one-step installation is good, tighten PVC ball valve, turn on the bolt in upper screwed hole, fluid is injected in sealing bore by jet oral siphon, when there being stabilized fluid to flow out in upper screwed hole, illustrating in sealing bore and being full of fluid, upper screwed hole of now being screwed on by bolt is closed PVC ball valve simultaneously and is stopped supplying water by centrifugal pump.In process of the test, regulate motor in several groups of different rotating speeds situations by frequency converter, by the signal value measured by lower torque signal coupling mechanism corresponding under different rotating speeds, after amplification filtering being carried out to signal by transmitter, simulating signal is flowed to capture card, and be delivered to computing machine by capture card, by respective data storage in computing machine.After smooth surface structure situation completes, by turning on bolt in lower threaded hole by the drain in sealing bore, V-type rail mobile platform is utilized to take out smooth test exemplar.When test exemplar is structured non-smooth surface, operate according to above same steps.In process of the test, regulate frequency converter to make motor at the class of above several groups of rotating speeds successively, data acquisition in capture card is gone out, store in computing machine successively.After several groups of test exemplar situations complete successively, all data are contrasted, analyze, processed, reaches a conclusion.When doing structured non-smooth surface test, do not need to provide fluid to jet inlet pipeline.Test sample surface applying coating test operation process is consistent with structured non-smooth surface process of the test.
In stream test process, according to assembling process, test unit one-step installation is good, before electric motor starting, tighten PVC ball valve, unthread bolts, open centrifugal pump and supply water in sealing bore and see in threaded hole that when having water to emerge, PVC ball valve opened by bolt of screwing on simultaneously.After electric motor starting, regulate motor to reach required rotating speed by frequency converter, because test sample surface has jet orifice, under the effect of the pressure, fluid penetrates from jet orifice to inner core direction.And inner core surrounding fluid is due to jet reason, need excessive, by the jet rising pipe on sealing bore right end cap, excess fluid is discharged, ensure to be full of fluid all the time in sealing bore, and pressure is atmospheric pressure state.Fluid enters fluidic device system by jet water inlet pipe from tank, and test exemplar is by jet orifice to inner core direction jet, and in sealing bore, excess fluid flows into tank by jet rising pipe, fluid circulation supply in tank.Regulate frequency converter to make motor at the class of several groups of rotating speeds of required contrast successively, data acquisition in capture card is gone out, store in computing machine successively.When doing smooth surface control test, because test sample surface does not exist jet situation, therefore around jet inlet pipeline inner chamber, inner core water cavity segment, after between sealing bore and test exemplar, inner chamber part is full of fluid, the PVC ball valve on jet water inlet pipe and the PVC ball valve on jet rising pipe are closed.After several groups of test exemplar situations complete successively, all data are contrasted, analyze, processed, finally reaches a conclusion.
Content described in this instructions embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also comprises those skilled in the art and conceives the equivalent technologies means that can expect according to the present invention.
Claims (10)
1. based on bionical submerged jet surface drag reduction test device, it is characterized in that: comprise fluidic component, power input module, water distribution assembly, moving assembly, magnet fluid sealing assembly and signal processing component, the motor of described power input module is connected with the input shaft of described fluidic component by the first shaft coupling, the output shaft of described fluidic component is connected with the torque signal coupling mechanism of described signal processing component by the second shaft coupling, and described signal processing component, described fluidic component are all arranged on described moving assembly; The water inlet pipe of described water distribution assembly is connected with the water inlet tube of described fluidic component, the rising pipe of described water distribution assembly and the water delivering orifice pipeline communication of described fluidic component; Described fluidic component is by magnet fluid sealing component sealing;
Described fluidic component comprises sealing bore assembly, outer barrel component, interior cartridge module, input shaft and output shaft, and described sealing bore assembly, described outer barrel component and described interior cartridge module are coaxially arranged the telescoping structure of formation three layers successively from outside to inside; The power intake of described input shaft is connected with the clutch end of described power input module, magnet fluid sealing assembly is housed on the right side of described outer barrel component, and described outer barrel component is by corresponding magnet fluid sealing assembly and described sealing bore component sealing, described inner core component sealing is contained in the clutch end of sealing bore right end cap of described input shaft through sealing bore assembly, and interior cartridge module described in ensureing and described input shaft run-in synchronism; The power intake of described output shaft and the urceolus left end cap of described outer barrel component are tightly connected, and the clutch end of described output shaft is connected with described signal processing component by the second shaft coupling;
Described water distribution assembly comprises tank, centrifugal pump, water inlet pipe and rising pipe, the water inlet of described centrifugal pump introduced by pipeline described in tank in, the water delivering orifice of described centrifugal pump is connected with the water inlet end of described water inlet pipe, the water side of described water inlet pipe is connected with the blasthole of described sealing bore assembly, the water inlet end of described rising pipe is communicated with the apopore of sealing bore assembly, in the tank described in the introducing of water side of described rising pipe, realize the circulation of test water; Described water inlet pipe is arranged flowmeter and tensimeter, described rising pipe is provided with ball valve;
Described moving assembly comprises bottom bracket, V-type rail and V-type rail mobile platform, described V-type rail level is arranged on the top of described support, described V-type rail mobile platform and described V-type rail are slidably connected, described V-type rail mobile platform installs described signal processing component, described fluidic component, described Power output assembly are installed on described bottom bracket, and signal processing component, described fluidic component and the described Power output assembly described in keeping is on same axis;
Described signal processing component comprises torque signal coupler base, keyway plate, torque signal coupling mechanism and signal processor, described torque signal coupler base is arranged on described V-type rail mobile platform, the described keyway plate described in the installation of torque signal coupler base top, one end of described torque signal coupling mechanism leads to and is arranged on described keyway plate, and the other end is connected with the clutch end of described output shaft by the second shaft coupling; The signal output part of described torque signal coupling mechanism is connected with outside signal processor signal.
2. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterized in that: described sealing bore assembly comprises with the sealing bore of blasthole, sealing bore left end cap and sealing bore right end cap, and described sealing bore left end cap, sealing bore right end cap seal the two ends being arranged on described sealing bore respectively; Described outer barrel component is arranged on the inside of described sealing bore, described outer barrel component comprises tubular test exemplar, urceolus left end cap and urceolus right end cap, described urceolus left end cap and described urceolus right end cap seal the two ends being arranged on described test exemplar respectively, and be furnished with magnet fluid sealing assembly outside described urceolus right end cap, described urceolus right end cap realizes the sealing between urceolus right end cap and sealing bore right end cap round platform place by corresponding magnet fluid sealing assembly; Described interior cartridge module comprises inner core, inner core left end cap and inner core right end cap, wherein said inner core left end cap and the sealing of described inner core right end cap are arranged on the two ends of described inner core, described inner core right end cap and the output terminal of described input shaft are spirally connected, and keep inner core right end cap, described urceolus right end cap and described sealing bore right end cap coaxial.
3. as claimed in claim 2 based on bionical submerged jet surface drag reduction test device, it is characterized in that: described sealing bore upper wall is provided with the first threaded hole for being vented, the lower wall of described sealing bore is provided with the second threaded hole for draining, and the first described threaded hole and the second threaded hole are all furnished with corresponding sealing bolt; The screw boss connecting water-supply-pipe is welded with above the blasthole of described sealing bore.
4. as claimed in claim 2 based on bionical submerged jet surface drag reduction test device, it is characterized in that: described magnet fluid sealing assembly comprises annular permanent magnet, two pieces of identical pole shoes matched with permanent magnet, and every block pole shoe inwall or outer wall have teeth groove; Two pieces of pole shoes, the revolving part of formation relative motion and the gaps between pole shoe and revolving part form magnetic circuit, form the magnetic seal be sealed on revolving part.
5. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterized in that: the outside of described output shaft is socketed left connecting cylinder, one end of left connecting cylinder by bolt and described sealing bore left end cap affixed, and keep left connecting cylinder and sealing bore left end cap coaxial; The other end of left connecting cylinder is equipped with left connecting cylinder end cap, a set of described magnet fluid sealing assembly is furnished with between described left connecting cylinder and described output shaft, the wherein endoporus of left connecting cylinder and two pieces of pole shoe transition fit of magnet fluid sealing assembly, two pieces of pole shoes, output shaft and the gaps between pole shoe and output shaft form magnetic circuit, form the magnetic seal be sealed on output shaft.
6. as claimed in claim 5 based on bionical submerged jet surface drag reduction test device, it is characterized in that: between described left connecting cylinder and described sealing bore left end cap, accompany adjustment pad, and the mounting hole of described sealing bore left end cap is embedded with water-sealed bearing, described left connecting cylinder end caps is furnished with deep groove ball bearing, and the two ends of described output shaft are contained on corresponding deep groove ball bearing and described water-sealed bearing.
7. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterized in that: the outside of described input shaft is socketed right connecting cylinder, wherein one end of right connecting cylinder and described sealing bore right end cap affixed, the other end is equipped with corresponding bearing air cover; The felt collar end cap for sealing is accompanied between described right connecting cylinder and described sealing bore right end cap; The mounting hole place of described sealing bore right end cap is embedded with water-sealed bearing, and the gap between described right connecting cylinder and described input shaft is furnished with deep groove ball bearing, and the two ends of described input shaft are contained on corresponding water-sealed bearing and deep groove ball bearing; The input end of described input shaft is furnished with the felt collar for sealing, and felt collar and input shaft are interference fit.
8. as claimed in claim 7 based on bionical submerged jet surface drag reduction test device, it is characterized in that: the inside surface of described sealing bore right end cap is provided with axial round platform, another set of magnet fluid sealing assembly is furnished with between the round platform of described urceolus right end cap and described sealing bore right end cap, the wherein endoporus of urceolus right end cap and two pieces of pole shoe transition fit of corresponding magnet fluid sealing assembly, two pieces of pole shoes, round platform and the gaps between pole shoe and round platform form magnetic circuit, form the magnetic seal be sealed on round platform.
9. as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterized in that: the first described shaft coupling is that elasticity nullifies shaft coupling, and the second described shaft coupling is blossom type shaft coupling.
10., as claimed in claim 1 based on bionical submerged jet surface drag reduction test device, it is characterized in that: the end of described V-type rail is furnished with positive stop.
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