CN100470224C - Detector for round cross section sample wall surface fluid friction resistance - Google Patents
Detector for round cross section sample wall surface fluid friction resistance Download PDFInfo
- Publication number
- CN100470224C CN100470224C CNB2007100993739A CN200710099373A CN100470224C CN 100470224 C CN100470224 C CN 100470224C CN B2007100993739 A CNB2007100993739 A CN B2007100993739A CN 200710099373 A CN200710099373 A CN 200710099373A CN 100470224 C CN100470224 C CN 100470224C
- Authority
- CN
- China
- Prior art keywords
- support
- support bar
- sensor
- power transmission
- transmission pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A frictional resistance measurement device of wall-surface fluid on round section test sample consists of model support unit including model head, front slide support ring, back slide support ring, model tail, fixing frame and support rod; and resistance measurement unit including transmission ring, radial transmission pin, axial transmission pin, transducer support sheath, transducer and transducer base. It is featured a setting measured test sample to be cylindrical form, placing transducer in runner and leading signal line out through hole.
Description
Technical field
The present invention relates to a kind of detector for round cross section sample wall surface fluid friction resistance, the fluid friction resistance of round section sample wall surface belongs to the fluid dynamics technical field of measurement and test when being used to measure different in flow rate.
Background technology
Main energy consumption when underwater sailing body is advanced in water is to be used for overcoming running resistance, therefore carry out resistance analysis and reduce resistance, for energy savings, improve working condition, improve work efficiency significant.The underwater sailing body running resistance mainly is made up of frictional resistance and pressure drag, and wherein frictional resistance accounts for the overwhelming majority of drag overall, especially fairshaped underwater sailing body, and analysis and the measurement of therefore carrying out frictional resistance are the keys of carrying out resistance analysis.
At present, fluid mainly is to finish based on the device for measuring force of various force balances to the acting force of round section object, and its power that records all is drag overall.Owing to the frictional resistance of forming drag overall is different with the reason that pressure drag produces, reduce the inevitable difference of technological approaches that they adopt, need measure the size of frictional resistance and pressure drag when the historical facts or anecdotes border is analyzed respectively, therefore the measurement mechanism of the drag overall of traditional measurement round section object can not adapt to new technical development demand.
Summary of the invention
Purpose of the present invention proposes a kind of detector for round cross section sample wall surface fluid friction resistance exactly, changes the situation of measuring drag overall in the existing fluid resistance proving installation, and the measurement of wall fluid frictional resistance is become a reality.This principle of device is simple, and is easy to operate, and test is reliable.
Technical scheme of the present invention is as follows:
A kind of detector for round cross section sample wall surface fluid friction resistance, it is characterized in that: this device contains model support unit and drag measurement unit, described model support unit comprises streamlined model head, support bar, fixed mount, is arranged on the front slide support ring and back sliding support ring and the streamlined model tail that are used to support sample on the support bar, described model head adopts dismountable fixedlying connected with the leading section of support bar, and the rearward end of described support bar is connected with fixed mount by the conical surface; Described drag measurement unit comprises sensor, sensor support cover, sensor base, radially power transmission pin, axially power transmission pin and force transmission ring, and described force transmission ring is arranged on the conical surface front end on the support bar, and contacts with back sliding support ring; Described radially power transmission pin passes support bar inside, and with the force transmission ring wringing fit; Described axial power transmission pin is installed in the center pit at support bar rear portion, and axially the same radially centre of power transmission pin of the front end face of power transmission pin contacts, and rear end face contacts with the contact of sensor; Described sensor is arranged in the sensor support cover, and contacts with the rear end face of axial power transmission pin, and the sensor support cover is fixedlyed connected with the tail end of the support bar conical surface; Described sensor base rear end is arranged in the model tail, fixedlys connected with the model tail with the sensor support cover respectively in the sensor base front and rear part.
Fixed mount of the present invention partly is made of external fixation part, brace rod and internal fixation, and the transversal section of described brace rod is wing cross section.Described streamlined model head adopts with being connected of support bar and is threaded.Described streamlined model head is replaced by different shape and size with streamlined model root of the tail according to needs.
Technical characterictic of the present invention also is: be processed with the trough of signal wire on the conical surface of support bar, be processed with cable hole on the brace rod of fixed mount.
The present invention compared with prior art has the following advantages and the high-lighting effect: 1) this device can directly be measured under the different operating modes fluid to the fluid friction resistance of round section sample wall surface; 2) sample is cylindrical shape, and is simple in structure, easily processing, easy accessibility; 3) this device not only can be connected with pipeline easily, carries out pressure current (liquid flow, sample is static) experiment; Simultaneously also can be easily be connected, carry out volume flow (liquid is static, the sample motion) experiment with trailer etc.; Therefore 4) head of round section sample and afterbody can be made into required shape and size according to the demand of different experiments, help carrying out the impact analysis to frictional resistance of different head and afterbody; 5) load-sensing unit is positioned at fluid inside, and signal wire is drawn by groove, hole, has both reduced possible error in the power transmittance process, has reduced the influence of stream field again; 6) be replaced by other fluids after, can study the influence of different fluid to round section sample wall surface fluid friction resistance; 7) mode of afterbody support has reduced support to the test influence on flow field.
Description of drawings
Fig. 1 is the structure of detector for round cross section sample wall surface fluid friction resistance embodiment provided by the invention and at ducted scheme of installation.
Fig. 2 is the A-A diagrammatic cross-section among Fig. 1.
Fig. 3 is the B-B diagrammatic cross-section among Fig. 1.
Among the figure: 1-model head, 2-front slide support ring, 3-sample, 4-back sliding support ring, 5-force transmission ring, 6-radially power transmission pins, 7-axially power transmission pins, 8-through wires hole, 9-trough, 10-sensor support cover, 11-sensor base, 12-model tail, 13-sensor, 14-fixed mount, 15-trunk line, 16-support bar.
Embodiment
Below in conjunction with accompanying drawing structure of the present invention, principle and the course of work are further described.
A kind of detector for round cross section sample wall surface fluid friction resistance that the present invention proposes mainly comprises model support unit and drag measurement unit.The model support unit comprises streamlined model head 1, support bar 16, fixed mount 14, is arranged on the front slide support ring 2 and the back sliding support ring 4 that are used to support sample 3 on the support bar 16, and streamlined model tail 12, described model head 1 adopts dismountable fixedlying connected with the leading section of support bar 16, such as screw thread or buckle connection etc., model head 1 can be designed to different shape and size according to requirement of experiment, thereby forms needed macroscopical flow field.Front slide support ring 2 is slidingly matched with the smooth cylindrical section of support bar 16 front portions, and its effect is exactly the front end that supports sample 3, and makes sample axially not have constraint.The smooth cylindrical section at back sliding support ring 4 internal diameters and support bar 16 rear portions is slidingly matched, and its effect is exactly the rear end of supporting sample 3, and makes sample 3 axially not have constraint.Sensor base 11 rear portions are arranged in the model tail 12, and model tail 12 is fastenedly connected by the screw rod at internal thread or buckle and sensor base 11 rear portions, anterior overlap 10 with sensor support and fixedly connected.The model tail also can be designed to different shapes by experimental needs, thereby forms the macroscopical flow field that needs.Fixed mount 14 partly is made of external fixation part, brace rod and internal fixation, the external fixation part is connected with trunk line 15, internal fixation partly passes through conical surface hole with support bar 16 rear end conical surface immovable fitting, the brace rod transversal section is wing cross section, its effect is that support bar 16 is fixed on the corresponding axis, and the interference to current can be reduced in its wing cross section.The angle of attack when adjusting sample 3 measurements by the setting angle rice of adjusting fixed mount 14 external fixation part.Support bar 16 front ends are detachably fixedlyed connected with model head 1, the same sliding support ring 2 of anterior smooth cylindrical section part cooperates, the smooth cylindrical section part in rear portion cooperates with back sliding support ring 4, the rear portion tapering part cooperates with fixed mount 14, and it is fastening with sensor support set 10 by screw thread, afterbody conical surface front end has a radial hole, and there is an axial center hole at place, afterbody axle center.The effect of support bar 16 is the installation bases that become model head 1 and drag measurement unit, and supports sample 3 by front slide support ring 2 and back sliding support ring 4.Sample 3 is cylindric, anterior the same sliding support ring 2 external diameters of its endoporus cooperate, the rear portion cooperates with the external diameter of back sliding support ring 4, rear end face is with the radially force transmission ring 5 front end faces contact of power transmission pin 6 is installed, its effect is to form frictional resistance at outside surface, and power is delivered on the front end face of force transmission ring 5 by rear end face.
The drag measurement unit comprises sample 3, force transmission ring 5, radially power transmission pin 6, axially power transmission pin 7, sensor support cover 10, sensor base 11 and sensor 13.Force transmission ring 5 is arranged on the conical surface front end on the support bar 16, and its front end face contacts with the rear end face of back sliding support ring 4, and end face does not contact with any object thereafter.Radially power transmission pin 6 is fixed on the diametric(al) of force transmission ring 5 centres, and be installed in the radial hole on the support bar 16, form clearance fit, radially the front end face of the coaxial power transmission pin 7 of the center section of power transmission pin 6 contacts, and the aperture surface of force transmission ring 5 forms clearance fit with the outer diametric plane of support bar 16.Radially to be frictional resistance that sample 3 is produced because of fluid pass to axial power transmission pin 7 by the front end face of force transmission ring 5 in the effect of power transmission pin 6.Axially power transmission pin 7 is installed in the center pit at support bar 16 rear portions, and the same radially centre of power transmission pin 6 of its front end face contacts, and the contact of the sensor of end face simultaneous interpretation thereafter 13 contacts.Sensor support is overlapped 10 front ends and is connected with support bar 16 tail end screw rods by internal thread, its front end face closely contacts with the rear end face of fixed mount 14, its internal diameter cylinder cooperates with the crest clearance of sensor 13, the effect of sensor support cover 10 is that support bar 16 is securely fixed on the fixed mount 14, supports sensor 13 simultaneously.Sensor base 11 is fastened on by screw on the rear end face of sensor support cover 10, and it act as and stops moving of sensor 13 backward directions, and link model tail 12.Sensor 13 is installed in the sensor support cover 10, and its power lead (not shown) and signal wire (not shown) are drawn outside the flow field by the trough 9 at support bar 16 rear portions and the through wires hole 8 on fixed mount 14 brace rods.
This device not only can be connected with pipeline easily, carries out pressure current (liquid flow, sample is static) experiment; Simultaneously also can be easily be connected, carry out volume flow (liquid is static, the sample motion) experiment with trailer etc.
When needs are changed sample, can operate according to following flow process: 1. unload the model head 1 on the lower support bar 16; 2. take out sample 3, pull down front slide support ring 2 and back sliding support ring 4; 3. take out sample to be tested 3, and install front slide support ring 2 and back sliding support ring 4 respectively in its front-end and back-end; 4. sample 3 is installed on the support bar 16 of trunk line 15 inside; 5. load onto model head 1.
Claims (5)
1. detector for round cross section sample wall surface fluid friction resistance, it is characterized in that: this device contains model support unit and drag measurement unit, described model support unit comprises streamlined model head (1), support bar (16), fixed mount (14), be arranged on the front slide support ring (2) and the back sliding support ring (4) that are used to support sample (3) on the support bar (16), and streamlined model tail (12), described streamlined model head (1) adopts dismountable fixedlying connected with the leading section of support bar (16), and the rearward end of described support bar (16) is connected with fixed mount (14) by the conical surface; Described drag measurement unit comprises sensor (13), sensor support cover (10), sensor base (11), radially power transmission pin (6), axially power transmission pin (7) and force transmission ring (5), described force transmission ring (5) is arranged on the conical surface front end on the support bar (16), and contacts with back sliding support ring (4); Described radially power transmission pin (6) passes support bar (16) inside, and with force transmission ring (5) wringing fit; Described axial power transmission pin (7) is installed in the center pit at support bar rear portion, and axially the same radially centre of power transmission pin (6) of the front end face of power transmission pin contacts, and the contact of the same sensor of rear end face (13) contacts; Described sensor (13) is arranged in the sensor support cover (10), and sensor support cover (10) is fixedlyed connected with the tail end of support bar (16) conical surface; Described sensor base (11) rear portion is arranged in the streamlined model tail (12), fixedlys connected with streamlined model tail (12) with sensor support cover (10) respectively in the sensor base front and rear part.
2. according to the described detector for round cross section sample wall surface fluid friction resistance of claim 1, it is characterized in that: described fixed mount (14) partly is made of external fixation part, brace rod and internal fixation, and the xsect of described brace rod adopts wing cross section.
3. according to claim 1 or 2 described detector for round cross section sample wall surface fluid friction resistance, it is characterized in that: described streamlined model head (1) adopts with being connected of support bar (16) and is threaded.
4. according to claim 1 or 2 described detector for round cross section sample wall surface fluid friction resistance, it is characterized in that: described streamlined model head (1) is replaced by different shape and size as required with streamlined model tail (12).
5. according to the described detector for round cross section sample wall surface fluid friction resistance of claim 2, it is characterized in that: on the conical surface of support bar (16), be processed with the trough (9) of signal wire, on the brace rod of fixed mount, be processed with cable hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100993739A CN100470224C (en) | 2007-05-18 | 2007-05-18 | Detector for round cross section sample wall surface fluid friction resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100993739A CN100470224C (en) | 2007-05-18 | 2007-05-18 | Detector for round cross section sample wall surface fluid friction resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101050995A CN101050995A (en) | 2007-10-10 |
| CN100470224C true CN100470224C (en) | 2009-03-18 |
Family
ID=38782518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100993739A Expired - Fee Related CN100470224C (en) | 2007-05-18 | 2007-05-18 | Detector for round cross section sample wall surface fluid friction resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100470224C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832853B (en) * | 2009-03-12 | 2012-03-28 | 西北工业大学 | Ridged flow-field test slab model |
| US8002315B2 (en) * | 2009-12-23 | 2011-08-23 | General Electric Corporation | Device for measuring fluid properties in caustic environments |
| CN102226736B (en) * | 2011-04-11 | 2012-12-19 | 哈尔滨工程大学 | Testing apparatus for evaluating drag-reduction effects of bionic non-smooth surface and bionic jet surface |
| CN102288382B (en) * | 2011-05-06 | 2013-02-06 | 哈尔滨工程大学 | Pull-type fluid resistance test device |
| CN102998087B (en) * | 2012-11-27 | 2015-04-08 | 哈尔滨工程大学 | Resistance testing device suitable for jet flow surface and non-smooth surface |
| CN103471806B (en) * | 2013-09-03 | 2016-05-11 | 武汉理工大学 | A kind of drum-type fluid friction resistance tester |
| CN103837322B (en) * | 2013-11-18 | 2016-05-04 | 中国特种飞行器研究所 | A kind of water surface flying device hydrodynamic performance test method |
| CN104155078B (en) * | 2014-07-07 | 2017-04-12 | 北京理工大学 | Adjustable driving system for underwater navigation body in water tunnel experiment |
| CN104326055B (en) * | 2014-11-26 | 2016-05-18 | 哈尔滨工业大学 | A kind of water hole experiment ventilation sail body spin device |
| EP3309542B1 (en) * | 2016-10-14 | 2019-03-27 | Roche Diagniostics GmbH | Test element analysis system for the analytical examination of a sample |
| CN108375449B (en) * | 2018-02-07 | 2019-04-16 | 哈尔滨工业大学 | The caliberating device and scaling method of the pressure difference measuring device of measurement friction stree indirectly |
| CN108801585B (en) * | 2018-04-20 | 2019-12-10 | 温州大学激光与光电智能制造研究院 | Material surface fluid resistance testing device based on laser ranging |
-
2007
- 2007-05-18 CN CNB2007100993739A patent/CN100470224C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101050995A (en) | 2007-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100470224C (en) | Detector for round cross section sample wall surface fluid friction resistance | |
| CN106123764A (en) | A kind of multifunctional examining examining system based on eddy current displacement sensor | |
| CN107991056A (en) | A kind of bullet train crosswind measuring terminals based on five-hole probe | |
| CN102374841B (en) | Axial clearance detection fixture for detecting clearance between rotor and end cover | |
| CN207703443U (en) | A kind of bullet train crosswind measuring terminals based on five-hole probe | |
| CN101858760A (en) | Spiral type water meter | |
| CN202928632U (en) | V-shaped inner cone flowmeter | |
| CN209495654U (en) | Test device for connecting fork and adjustment arm assembly | |
| CN213209145U (en) | Liquid turbine flowmeter with multiple rectifying devices | |
| CN102798444B (en) | High-pressure water injection meter detecting device | |
| CN201780087U (en) | Marine crankshaft shrinkage fit measuring tool | |
| CN201653456U (en) | Spiral type water meter | |
| CN213986459U (en) | Pressure pipeline welding seam detection device | |
| CN209818051U (en) | Mechanical body of variable-diameter flowmeter | |
| CN206146370U (en) | Improvement type is based on eddy current displacement sensor's multi -functional detecting system | |
| CN105372446A (en) | Differential pressure type wind speed measuring sensor and detecting device with same | |
| CN210321843U (en) | Sensor for fluid flow meter | |
| CN208984149U (en) | A kind of Pi Tuoba flowmeter | |
| CN218885786U (en) | Thermal conductivity detection nitrogen element analyzer | |
| CN218765406U (en) | Novel conical float flowmeter | |
| CN107144310A (en) | A kind of intelligent low-power consumption precession spiral flowmeter | |
| CN1013897B (en) | Flowmeter for small flow | |
| CN210070900U (en) | Steel pipe inner wall radian measuring device | |
| CN216695564U (en) | Power steering gear valve assembly force characteristic detection device | |
| CN210689753U (en) | Flow detection equipment for petroleum safety management |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090318 Termination date: 20150518 |
|
| EXPY | Termination of patent right or utility model |