CN109520401B - Deformation device for mantis shrimp-like body surface non-smooth surface and resistance testing device thereof - Google Patents
Deformation device for mantis shrimp-like body surface non-smooth surface and resistance testing device thereof Download PDFInfo
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- CN109520401B CN109520401B CN201811454393.8A CN201811454393A CN109520401B CN 109520401 B CN109520401 B CN 109520401B CN 201811454393 A CN201811454393 A CN 201811454393A CN 109520401 B CN109520401 B CN 109520401B
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 241000258241 Mantis Species 0.000 title claims description 8
- 241001275767 Stomatopoda Species 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000011553 magnetic fluid Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 description 12
- 238000005452 bending Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 230000008602 contraction Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011664 nicotinic acid Substances 0.000 description 2
- 230000009182 swimming Effects 0.000 description 2
- 241000251730 Chondrichthyes Species 0.000 description 1
- 241001125840 Coryphaenidae Species 0.000 description 1
- 241001275815 Hoplocarida Species 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
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- 230000009972 noncorrosive effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The invention discloses a deformation device for a non-smooth surface of a body surface of a mantis shrimp, which comprises an end cover, a plurality of first frameworks and a plurality of second frameworks which are sequentially arranged from left to right, wherein the lower ends of the leftmost first frameworks and the leftmost second frameworks are fixedly connected to a bracket, the end cover is fixedly connected with the leftmost second frameworks through connecting pieces, a closed cavity is formed by connecting the end cover with the leftmost first frameworks, between two adjacent first frameworks, between the rightmost first frameworks and the leftmost second frameworks and between the two adjacent second frameworks through rubber films, a first electric push rod and a second electric push rod are further arranged between the two adjacent second frameworks, and the first electric push rod is positioned above the second electric push rod. The resistance testing device comprises a hydraulic circulating device, a testing device and the deformation device; the deformation device is arranged in a test container of the hydraulic circulation device, and a support of the deformation device is connected with a test end of the test device.
Description
Technical Field
The invention relates to a fluid resistance testing device, in particular to a mantis shrimp imitation body surface non-smooth surface deformation device and a resistance testing device thereof.
Background
Friction is one of the main modes of energy loss, friction resistance accounts for about 40% of total resistance during high-speed movement, and 70% -80% of resistance to movement of an object in water is caused by surface friction resistance. How to reduce friction resistance is always the focus of research of students at home and abroad, and the drag reduction method has a bionic non-smooth wall drag reduction technology, a flexible surface drag reduction technology, a surface coating drag reduction technology, a micro-bubble drag reduction technology, a polymer drag reduction technology, a jet drag reduction technology and the like, wherein the bionic drag reduction is a very popular research direction at present. Many subtle structures, such as scales and gills of sharks, flexible surfaces of dolphins, groove structures of earthworms, deformed groove structures of mantis shrimps and the like, are evolved over thousands of years, and have good implications for drag reduction studies. The mantis shrimp is used for avoiding natural enemies, the body structure is optimized, and when a danger is encountered, the mantis shrimp gets fast through continuous abdominal swing of the second half part of the body, and gets rid of the danger, so that the curved swing deformation wall surface can be put into experiments to study whether the mantis shrimp can help to reduce the resistance during underwater swimming.
When people adopt various novel drag reduction technologies, in order to master more accurate mechanisms and record drag reduction effects, experiments are needed by means of some high-end equipment, and water holes, wind tunnels and water ponds are generally adopted for measuring drag, but the devices have high cost, complex mechanisms, large occupied area, difficult simulation of experimental flow fields, long experimental period and great limitation. Therefore, the design and development of a small testing device which is low in cost, simple to operate and capable of testing the deformed wall surface are required, and the testing device is particularly critical to drag reduction research.
Disclosure of Invention
Aiming at the problems of large occupation area, high cost, complex operation, difficult assembly and disassembly, limited functions and the like of the traditional fluid resistance testing device, the invention provides a mantis shrimp-like body surface non-smooth surface deformation device and a resistance testing device thereof.
The technical scheme adopted by the invention is as follows: the utility model provides a deformation device on non-smooth surface of imitative mantis shrimp body surface, deformation device includes from left side end cover, a plurality of first skeleton, a plurality of second skeleton that arrange in proper order right side, the equal fixed connection of lower extreme of first skeleton on the left side and second skeleton on the left side, the end cover passes through connecting piece fixed connection with the second skeleton on the left side, between end cover and the first skeleton on the left side, between two adjacent first skeletons, between the first skeleton on the right side and the second skeleton on the left side and between two adjacent second skeletons, form a inclosed cavity after linking to each other through the rubber membrane, still install first electric putter and second electric putter between two adjacent second skeletons, first electric putter is located the top of second electric putter.
Further, the first framework is composed of a first lower clamp and a first upper clamp fixedly connected to the first lower clamp, and the second framework is composed of a second lower clamp and a second upper clamp fixedly connected to the second lower clamp.
Further, the first lower clamp is semicircular, and the first upper clamp is semi-elliptical; the second lower clamp and the second upper clamp are semi-elliptic with different short shaft lengths.
Further, the lengths of the short axes of the semi-elliptic left to right of the first upper hoops on the first frameworks are gradually increased and then gradually decreased; and the lengths of the short axes of the second lower hoops and the second upper hoops on the second frameworks from left to right in a semi-elliptical shape are gradually reduced.
Further, the device also comprises a plurality of first fixing groove seats and a plurality of second fixing groove seats, wherein the upper half part of the first fixing groove seats is semi-elliptical, the lower half part of the first fixing groove seats is semi-circular, and the rubber membrane is sleeved outside the first fixing groove seats and then is connected with the first upper clamp and the first lower clamp through upper and lower clamping, so that the rubber membrane is fixed on the first fixing groove seats; the upper half part and the lower half part of the second fixed groove seat are semi-elliptic with different short shaft lengths, and the rubber film is sleeved outside the second fixed groove seat and connected with the second upper clamp and the second lower clamp through upper and lower clamping so as to be fixed on the second fixed groove seat.
Further, the rightmost second framework is connected with a tail contraction piece; preferably, the tail shrink is hollow internally and has a radial cross-section that is oval with a decreasing minor axis and major axis.
The invention further aims to provide a resistance testing device for the non-smooth surface of the body surface of the mantis shrimp, which comprises a hydraulic circulation device, a testing device and the deformation device; the deformation device is arranged in a test container of the hydraulic circulation device, and a support of the deformation device is connected with a test end of the test device.
Further, the testing device comprises a tension sensor and a sensor fixing frame, one end of the tension sensor is fixedly connected with the support, one end of the tension sensor is fixedly connected with the sensor fixing frame, and the sensor fixing frame is fixedly connected with the test container.
Further, the hydraulic circulating device comprises a motor, a pump, a ball valve, a test container, a butterfly valve and a water tank, wherein the motor provides power for the pump, a water inlet of the pump is communicated with the water tank, a water outlet of the pump is sequentially communicated with the ball valve, a rectifying grid and an inlet of the test container, an outlet of the test container is sequentially communicated with the butterfly valve and the water tank, and a support of the deformation device is arranged in the test container.
Further, a through hole is formed in the test container, the end cover is arranged on the through hole, and magnetic fluid sealing is conducted between the through hole and the end cover.
The beneficial effects of the invention are as follows: the device has the advantages of small volume, compact and simple structure, low required cost, simple operation, strong test performance, no limit by surrounding test environment and the like, and can meet various test requirements in the test process; the deformation device can realize bending, elongation and shortening and elongation bending, so that the movement process of the mantis shrimp during swimming is simulated; the design of the tail contraction piece can prevent the local loss of the fluid from being too large, and the accuracy of test data is affected; the whole device realizes the cyclic utilization of water, and ensures the environment-friendly and pollution-free whole test process. The resistance testing device is provided with a resistance testing device for testing non-smooth surfaces in an underwater environment under different shapes.
Drawings
FIG. 1 is a front view of a resistance testing device of the present invention;
FIG. 2 is a cross-sectional view of a deformation apparatus of the present invention;
FIG. 3 is a cross-sectional view of section A-A of FIG. 1;
FIG. 4 is an enlarged view of FIG. 2 at I;
FIG. 5 is a cross-sectional view B-B of FIG. 2;
FIG. 6 is an enlarged view at III of FIG. 1;
FIG. 7 is a diagram of a magnetic fluid seal configuration;
FIG. 8 is an enlarged view of FIG. 1 at II;
In the figure: the motor 1, the coupling 2, the pump 3, the ball valve 4, the adapter 5, the diffusion section adapter 6, the support section adapter 7, the adapter support 8, the contraction section adapter 9, the rectification grating 10, the magnetic fluid sealing structure 11, the deformation device 12, the test container 13, the rear diffusion section adapter 14, the butterfly valve 15, the control section adapter 16, the square 90 DEG tube 17, the reflux section adapter 18, the reflux section support 19, the water tank 20, the test platform 21, the display 22, the tension sensor 23, the sensor support 24, the pump water inlet 25, the circlip 11-1 for holes, the pole shoe 11-2, the permanent magnet 11-3, the adjusting gasket 11-4, the first lower clamp 12-1, the connecting piece 12-2, the end cover 12-3, the fixed ring 12-4, the rubber membrane 12-5, the first upper clamp 12-6, the first fixed slot seat 12-7, the second upper clamp 12-8, the second fixed slot seat 12-9, the first electric push rod 12-10, the push rod fixed support 12-11, the tail contraction piece 12-12, the second electric push rod 12-13, the second lower clamp 12-14, the second electric push rod 12-14, the lower clamp 12-16, the observation housing 13 and the observation housing 13-3.
Description of the embodiments
The following further describes the implementation of the present invention with reference to the accompanying drawings.
As shown in FIG. 2, the shape of the upper surface of the whole deformation device 12 is similar to that of the upper surface of the mantis shrimp, the deformation device comprises an end cover 12-3, a plurality of first frameworks and a plurality of second frameworks which are sequentially arranged from left to right, the lower ends of the leftmost first frameworks and the leftmost second frameworks are fixedly connected to a bracket, the end cover 12-3 and the leftmost second frameworks are fixedly connected through a connecting piece 12-2, a closed cavity is formed between the end cover 12-3 and the leftmost first frameworks, between two adjacent first frameworks, between the rightmost first frameworks and the leftmost second frameworks and between the two adjacent second frameworks after being connected through a rubber film 12-5, a first electric push rod 12-10 and a second electric push rod 12-13 are further arranged between the two adjacent second frameworks, and the first electric push rod 12-10 is positioned above the second electric push rod 12-13.
The further technical scheme is that the first framework consists of a first lower clamp 12-1 and a first upper clamp 12-6 fixedly connected to the first lower clamp 12-1 through bolts and nuts, 6 groups are formed, the cross section of the leftmost first lower clamp 12-1 is rectangular, so that the first framework is conveniently fixed on a bracket, the rest is semicircular and is used for simulating the surface shape of the mantis shrimp, the measuring result is more accurate, and the first framework is placed in a semicircular groove formed in the bracket; the second framework consists of a second lower clamp 12-14 and a second upper clamp 12-8 fixedly connected to the second lower clamp 12-14 through bolts and nuts, 8 groups are shared, and the cross section of the leftmost second lower clamp 12-14 is rectangular, so that the second framework is conveniently fixed on a support.
Further, the first lower clamp 12-1 is semicircular, and the first upper clamp 12-6 is semi-elliptical; the second lower clip 12-14 and the second upper clip 12-8 have semi-oval shapes with different minor axis lengths.
The further scheme is that the lengths of the short axes of the first upper hoops 12-6 on the first frameworks from left to right in a semi-elliptical shape are gradually increased and then gradually decreased; the minor axis length of the second lower hoops 12-14 and the second upper hoops 12-8 on the second frameworks from left to right in a semi-elliptical shape is gradually reduced, and the variation of the minor axis length enables the upper surface of the deforming device 12 to be more close to the curved shape of the upper surface of the mantis shrimp.
The rubber membrane 12-5 is sleeved outside the first fixed groove seat 12-7 and then connected with the first upper clamp 12-6 and the first lower clamp 12-1 through up-down clamping, so that the rubber membrane 12-5 is fixed on the first fixed groove seat 12-7; the upper half and the lower half of the second fixed groove seat 12-9 are semi-elliptic with different short shaft lengths, and the rubber film 12-5 is sleeved outside the second fixed groove seat 12-9 and then connected with the second upper clamp 12-8 and the second lower clamp 12-14 through upper and lower clamping so that the rubber film 12-9 is fixed on the second fixed groove seat 12-9.
The further proposal is that the rightmost second framework is connected with tail contraction pieces 12-12 through bolts and nuts; preferably, the tail shrink 12-12 is hollow in its interior and has a radial cross-section that is oval with a decreasing minor axis and major axis, primarily to reduce localized loss of fluid, affecting test accuracy, as shown in FIG. 5.
The first electric push rod 12-10 and the second electric push rod 12-13 are also arranged between the two adjacent second frameworks, the first electric push rod 12-10 is positioned above the second electric push rod 12-13, and the more detailed scheme is that: the second fixed slot seat 12-9 adopts a non-hollow structure, the upper and lower parts of the right end face of the radial wall surface of the first to seventh second fixed slot seats 12-9 are respectively provided with a first electric push rod 12-10 and a second electric push rod 12-13, push rod fixed supports 12-11 are respectively welded at the upper and lower parts of the left end face of the radial wall surface of the second to eighth second fixed slot seats 12-9, and the push rod top ends of the first electric push rod 12-10 and the second electric push rod 12-13 are connected with the push rod fixed supports 12-11 through pins, as shown in figure 4.
The connecting piece 12-2 connects the end cover 12-3 with the leftmost second fixing groove seat 12-9, and the connecting piece 12-2 is used for fixedly supporting the left deformation part of the deformation device 12.
The invention also provides a resistance testing device for the non-smooth surface of the mantis shrimp-like body surface, which comprises a hydraulic circulating device, a testing device and the deformation device; the deformation device is arranged in a test container of the hydraulic circulation device, and a support of the deformation device is connected with a test end of the test device.
Further scheme is, combining figure 1, hydraulic circulation device includes motor 1, pump 3, ball valve 4, test container 13, butterfly valve 15, basin 20, motor 1 provides power for pump 3, and the water tank 20 is let in to the water inlet of pump 3, and the delivery port of pump 3 communicates ball valve 4, rectification bars 10 and test container 13's entry in proper order, and test container 13's export communicates butterfly valve 15 and basin 20 in proper order, deformation device's support sets up in test container 13. The more specific scheme is:
The motor 1 provides power for the pump 3, the motor 1 is connected with the pump 3 through the coupling 2, the water inlet of the pump 3 is connected with the pump water inlet pipe 25 through the flange, the water inlet of the pump water inlet pipe 17 is led into the water tank 20, the water outlet of the pump 3 is connected with the connecting pipe 5 through the flange, the ball valve 4 is arranged on the connecting pipe 5 and used for controlling test flow, the water outlet of the connecting pipe 5 is connected with one end of the diffusing pipe 6 through a 90-degree elbow, the other end of the diffusing pipe 6 is connected with the supporting pipe 7 through the flange, the water outlet of the supporting pipe 7 is connected with the contracting pipe 9, the left contracting part of the contracting pipe 9 is in the shape of a round table, the left part on the right is in the shape of a cuboid, the right end is connected with the flange of the rectifying grid 10 and the test container 13, the rectifying grid 10 is used for reducing energy loss of fluid, a uniform flow field is formed in the test container 13, the test container 13 is arranged on the test platform 21, the water outlet of the test container is connected with the rear diffusing pipe 14, the other end of the rear diffusing pipe 14 is connected with the controlling pipe 16 through the flange, 15 is arranged on the controlling pipe 16, the other end of the controlling pipe 16 is used for controlling the flow of the fluid, the flowing out, the square controlling pipe 16 is connected with the upper end of the 90-degree square connecting pipe 17 and the lower end of the circulating pipe 17 is connected with the upper end of the square 18, and the lower end of the circulating pipe 18 is connected with the lower end of the circulating pipe 18.
The test vessel 13 will be described in detail with reference to fig. 1 and 3: the test container 13 comprises a lower shell 13-1, an observation window 13-2 and an upper shell 13-3, wherein the lower shell 13-1 is arranged at the lower end of the whole test container 13, the upper shell 13-3 is fixedly connected with nuts by bolts at the upper end and two sides of the upper shell 13-3 by the observation window 13-2 to form a closed space with an outlet and an inlet, the lower shell 13-1 is in a ladder shape and consists of two horizontal planes and a vertical plane, the height of the vertical plane is equal to that of the deformation device 12, when water flows in from the horizontal plane at the left end, the water can directly contact with the upper surface of the deformation device 12 to prevent unnecessary local loss caused by sudden expansion of a pipeline, through holes are formed in the vertical plane and are used for installing the deformation device 12, the end cover 12-3 of the deformation device 12 and the fixed ring 12-4 penetrate through the through holes of the lower shell 13-1, the magnetic fluid sealing structure 11 is installed at the inner ends of the through holes and the outer ends of the end cover 12-3 and the fixed ring 12-4, the deformation device 12 is directly placed on the lower shell 13-1, and the observation window 13-2 is made of colorless glass material and is used for observing the deformation process of the deformation device 12. In order to reduce the influence of friction, a roller 12-15 is installed at the lower end of the bracket 12-16, and the roller 12-15 is in contact with the lower housing 13-1.
The testing device comprises a tension sensor 23 and a sensor fixing frame 24, one end of the tension sensor 23 is fixedly connected with the support, one end of the tension sensor 23 is fixedly connected with the sensor fixing frame 24, and the sensor fixing frame 24 is fixedly connected with the test container. Specific: referring to fig. 1 and 8, the right end of the tension sensor 23 is connected with the bracket 12-16 by passing through the lower housing 13-1 through bolts and nuts, the left end is connected with the sensor fixing frame 24, the sensor fixing frame 24 is concave in overall shape, is directly welded on the vertical surface of the lower housing 13-1, the tension sensor 23 is connected with the display screen 22 through a circuit, and the display screen 22 is directly mounted on the test platform 21.
The auxiliary device will be described in detail with reference to fig. 1, 6 and 7: the upper end of the connecting pipe supporting frame 8 is connected with the supporting section connecting pipe 7, the reflux section supporting frame 19 is used for fixing the reflux section connecting pipe 18, the display screen 22 and the test container 13 are installed on the test platform 21, the magnetic fluid sealing structure 11 is installed at the inner end of the through hole on the vertical surface of the lower shell 13-1 and the outer ends of the end cover 12-3 and the fixing ring 12-4, the magnetic fluid sealing structure comprises a circlip 11-1 for holes, a pole shoe 11-2, a permanent magnet 11-3 and an adjusting gasket 11-4, the permanent magnet 11-3 is tightly sleeved in the through hole of the lower shell 13-1, the two pole shoes 11-2 are arranged on the two sides of the permanent magnet 11-3, the magnetic fluid sealing structure 11 forms an annular sealing gap through magnetic fluid, the adjusting gasket 11-4 is embedded between the outer wall of the pole shoe 11-2 and one end of the through hole of the lower shell 13-1, leakage between the pole shoe 11-2 and the installation through hole is prevented, the circlip 11-1 for positioning and fixing the pole shoe 11-2, and the magnetic fluid sealing structure has the advantages that: zero leakage can be achieved within a reasonable pressure differential; this structure is non-contact, preventing the influence of the measurement result because the end cap 12-3 is in direct contact with the through hole in the vertical face of the lower housing 13-1 during measurement.
The working principle of the testing device is as follows: the main medium of the invention is water, and the invention is also suitable for other non-corrosive liquid mediums. The deformation device 12 can realize three deformations of bending, elongation and shortening and elongation and bending, when the bending is realized, the first electric push rod 12-10 needs to be controlled to be elongated and the second electric push rod 12-13 needs to be controlled to be shortened, when the elongation and shortening are realized, the first electric push rod 12-10 and the second electric push rod 12-13 only need to be simultaneously controlled to be elongated and shortened, and when the elongation and bending are realized, the first electric push rod 12-10 and the second electric push rod 12-13 only need to be controlled to be elongated, but the elongation speed of the first electric push rod 12-10 is larger than that of the second electric push rod 12-13. When the test is started, the water tank 20 is fully filled with water, the ball valve 4 on the connecting pipe 5 and the butterfly valve 15 of the control section connecting pipe 16 are opened, the motor 1 is started, the shaft of the motor 1 drives 3 the pump through the coupler 2, the pump 3 pumps the water from the water tank 20 into the pump water inlet pipe 25 through the pressure difference, the water enters the test container 13 from the water outlet of the pump 3 through the connecting pipe 5, the diffusion section connecting pipe 6, the supporting section connecting pipe 7 and the contraction section connecting pipe 9, then finally enters the water tank 20 through the rear diffusion section connecting pipe 14, the control section connecting pipe 16, the square 90-degree pipe 17 and the backflow section connecting pipe 18, and water circulation is formed, at the moment, the first electric push rod 12-10 is extended, the second electric push rod 12-13 is shortened, bending is formed, the bending phenomenon is simulated when the mantis moved, the deformation device 12 is subjected to the action of the water, the double-headed bolt connected to the support 12-16 has a tensile force, the tensile force is finally transmitted to the tension sensor 23, and the deformation resistance of the bending membrane 12-6, 12-8 and the rubber membrane 12-8 can be deformed under the action of the smooth surface can be measured.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but also equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Claims (8)
1. The resistance testing device for the non-smooth surface of the body surface of the mantis-like is characterized by comprising a hydraulic circulating device, a testing device and a deformation device for the non-smooth surface of the body surface of the mantis-like; the deformation device is arranged in a test container of the hydraulic circulation device, and a bracket of the deformation device is connected with a test end of the test device;
The testing device comprises a tension sensor and a sensor fixing frame, one end of the tension sensor is fixedly connected with the bracket, one end of the tension sensor is fixedly connected with the sensor fixing frame, and the sensor fixing frame is fixedly connected with the test container; the test container comprises a lower shell, an observation window plate and an upper shell, wherein the lower shell is arranged at the lower end of the whole test container, the upper shell is arranged at the upper end, the two sides of the upper shell are fixedly connected with each other through bolts and nuts to form a closed space with an outlet and an inlet, the lower shell is in a ladder shape and consists of two horizontal planes and a vertical plane, the height of the vertical plane is equal to that of a deformation device, through holes are formed in the vertical plane and are used for installing the deformation device, the deformation device is directly arranged on the lower horizontal plane of the lower shell, and the observation window plate is made of colorless glass and is used for observing the deformation process of the deformation device;
The deformation device comprises an end cover, a plurality of first frameworks and a plurality of second frameworks which are sequentially arranged from left to right, wherein the lower ends of the leftmost first frameworks and the leftmost second frameworks are fixedly connected to a support, the end cover is fixedly connected with the leftmost second frameworks through connecting pieces, the end cover is fixedly connected with the leftmost first frameworks, the two adjacent first frameworks, the right first frameworks and the leftmost second frameworks and the two adjacent second frameworks are connected through rubber films to form a closed cavity, the first electric push rod and the second electric push rod are further installed between the two adjacent second frameworks, and the first electric push rod is located above the second electric push rod.
2. The drag testing device for a non-smooth surface of a body surface of a mantis imitation of claim 1, wherein the first framework comprises a first lower clamp and a first upper clamp fixedly connected to the first lower clamp, and the second framework comprises a second lower clamp and a second upper clamp fixedly connected to the second lower clamp.
3. The resistance testing device for a non-smooth surface of a body surface of a mantis-like as in claim 2, wherein the first lower clamp is semi-circular and the first upper clamp is semi-elliptical; the second lower clamp and the second upper clamp are semi-elliptic with different short shaft lengths.
4. The resistance testing device for the non-smooth surface of the body surface of a mantis-like body according to claim 3, wherein the lengths of the minor axes of the first upper hoops on the first frameworks from left to right in a semi-elliptical shape are gradually increased and then gradually decreased; and the lengths of the short axes of the second lower hoops and the second upper hoops on the second frameworks from left to right in a semi-elliptical shape are gradually reduced.
5. The resistance testing device for the non-smooth surface of the body surface of the mantis shrimp-like body of claim 4, further comprising a plurality of first fixed groove seats and a plurality of second fixed groove seats, wherein the upper half part of the first fixed groove seats is semi-elliptical, the lower half part of the first fixed groove seats is semi-circular, and the rubber membrane is sleeved outside the first fixed groove seats and then is fixedly arranged on the first fixed groove seats by connecting the first upper clamp and the first lower clamp through up-down clamping; the upper half part and the lower half part of the second fixed groove seat are semi-elliptic with different short shaft lengths, and the rubber film is sleeved outside the second fixed groove seat and connected with the second upper clamp and the second lower clamp through upper and lower clamping so as to be fixed on the second fixed groove seat.
6. The resistance testing device for the non-smooth surface of a body surface of a simulated mantis of claim 5, wherein the rightmost second framework is connected with a tail shrink; the tail shrink piece is hollow, and the radial section of the tail shrink piece is elliptical with the short axis and the long axis gradually decreasing.
7. The drag testing device for the non-smooth surface of the body surface of the mantis shrimp according to claim 1, wherein the hydraulic circulating device comprises a motor, a pump, a ball valve, a test container, a butterfly valve and a water tank, the motor provides power for the pump, a water inlet of the pump is led into the water tank, a water outlet of the pump is sequentially communicated with the ball valve, a rectifying grid and an inlet of the test container, an outlet of the test container is sequentially communicated with the butterfly valve and the water tank, and a bracket of the deformation device is arranged in the test container.
8. The resistance testing device for the non-smooth surface of the body surface of the mantis-like as claimed in claim 1, wherein the test container is provided with a through hole, the end cover is arranged on the through hole, and magnetic fluid sealing is carried out between the through hole and the end cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811454393.8A CN109520401B (en) | 2018-11-30 | 2018-11-30 | Deformation device for mantis shrimp-like body surface non-smooth surface and resistance testing device thereof |
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| CN108844714A (en) * | 2018-05-30 | 2018-11-20 | 浙江工业大学 | A kind of the bionic non-smooth surface drag reduction test device and simulator of variable curvature |
| CN209214525U (en) * | 2018-11-30 | 2019-08-06 | 浙江工业大学 | The deformation device and resistance measurement device of imitative mantis shrimp body surface non-smooth surface |
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| CN205819522U (en) * | 2016-08-02 | 2016-12-21 | 刘钰 | Staggered form Grazing condition bionic fish tail propulsive mechanism based on linkage |
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