CN106910400A - Gas flow rate and pressure relation demonstration instrument - Google Patents
Gas flow rate and pressure relation demonstration instrument Download PDFInfo
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- CN106910400A CN106910400A CN201710176215.2A CN201710176215A CN106910400A CN 106910400 A CN106910400 A CN 106910400A CN 201710176215 A CN201710176215 A CN 201710176215A CN 106910400 A CN106910400 A CN 106910400A
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- small pressure
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases
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- Measuring Volume Flow (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of gas flow rate and pressure relation demonstration instrument, a base is set（10）, it is parallel on base that two pieces of risers for being separated with distance are installed, blast fan, impeller axle are installed between two risers（1）Two ends are supported in the through hole opened on two risers, wherein one end and a motor for being arranged on adjustable speed on riser（2）It is connected, one group of small pressure gage is installed in the front of another riser（8）, the U-tube of small pressure gage is fixed in plate face, and graduated scale is carved with plate face, and the probe or pressure transducer of small pressure gage are arranged on the chute set in a plate face（15）Interior, chute is the through hole communicated with the back side, and each probe positions is adjustable, experiences the wind speed of diverse location.The present invention experiences the relation of flow velocity and pressure in fluid with allowing student image, so as to more fully understand Bernoulli's theorem.
Description
Technical field
The present invention relates generally to a kind of physics facility, gas flow rate and pressure relation are particularly quantitatively probed into and demonstrated
And the experimental provision of Bernoulli equation.
Background technology
In a fluid system, such as in air-flow, current, flow velocity is faster, and the pressure that fluid is produced is just smaller, here it is being claimed
It is the Denier Bernoulli's theorem of the father of hydrodynamics.The content of Bernoulli's theorem is：By that can not press, perfect fluid is along flow tube
Bernoulli's theorem during Steady Flow knows that flowing velocity increases, and the static pressure of fluid will reduce；Conversely, flowing velocity reduces, fluid
Static pressure will increase.Its essence is the conservation of mechanical energy of fluid, both：Kinetic energy+gravitional force+pressure potential=constant.Bernoulli Jacob determines
Rule has a wide range of applications in hydraulics and applied fluid mechanics, is also that Students ' Learning physical knowledge needs emphasis to understand and slap
The important content held.In newly organized compulsory education Physics Course standard（Promulgate within 2 months 2012）In point out：" understand rate of flow of fluid with
The relation of pressure and its application in life ".The relation for probing into rate of flow of fluid and pressure is junior middle school physics teaching content, but one
The straight instrumentation without dedicated presentation and the relation for probing into flow velocity and pressure, current qualitatively product seldom, and demonstrates interior
Appearance is single, and the middle school student for causing rigid connection to touch physics clear to basic physicses knowledge cannot grasp understandablely, along with physically
Some theoretical property concepts, if not explained analysis, it is difficult to allow those to begin to learn the junior middle school student of physics understand, so that big portion
The students divided lose learning interest.
In the prior art, it is more with the experimental provision of flow velocity relation about learning gas pressure, model experiment therein
Device is：The shape that side is thick, side is thin is processed into the left and right sides of glass tube, U-tube is connected below glass tube, in U
Load colored liquid in shape pipe.When being blown such as air-flow to glass tube, air velocity in tubule is substantially very fast, while it was observed that with
Liquid level in the U-tube side of tubule connection rises, and gas is smaller to the pressure of lower section liquid level faster to illustrate flow velocity；It is same in this
When also observe that liquid level in the U-tube opposite side connected with extra heavy pipe declines, illustrate the slower gas of flow velocity to lower section liquid level
Pressure is larger, so as to illustrate the relation of gas pressure intensity and flow velocity：It is small in the big local pressure of flow velocity for the gas for flowing, stream
The small local pressure of speed is big.
Appealing the shortcoming of experimental provision is：Glass tube size everywhere immobilizes, when blowing the gas such as certain flow rate
During body, can not change with the ratio between the flow velocity in tubule in extra heavy pipe, that is, in experimentation, the flow velocity in extra heavy pipe and in tubule
Can only increase with the increase of additional air-flow velocity, reduce with the reduction of additional air-flow velocity, even if many experiments, often
The secondary only essentially identical experimental phenomena of yardstick for obtaining, the difference in height for being embodied in U-tube both sides liquid level is essentially identical,
Cause the convincingness of experimental phenomena very poor, this is to cause student not deep to the relation understanding of gas pressure intensity and flow velocity, is understood not
Main cause in place.In existing patent CN 202662196, structure and representative gases pressure and the flow velocity of experimental provision
The experimental provision of relation is similar to, and the simply invention is become for liquid fluid by gas, and fluid circulation, the hair are driven by water pump
Bright shortcoming and representative gases pressure and the experimental provision of flow velocity relation be substantially.In the U of patent CN 204946437
In in order to probe into gas pressure intensity and flow velocity relation, it is transparent that the experimental provision for being used includes that the transparent pipe that keeps flat, two ends are connected to
The U-tube and support of pipe homonymy.The main improvement of the invention is film that can be by press strip extruded sleeve on transparent pipe
Come the size for changing the cross-sectional sizes of transparent pipe so as to change tube fluid flow velocity, but it can only contrast the different local gas of flow velocity
The pressure of body is differed, and can not measure the pressure values of lower gas different in flow rate, in addition, by press strip extruded sleeve on transparent pipe
Film it is also very limited to change the cross-sectional sizes of transparent pipe.
The content of the invention
It is an object of the invention to provide a kind of physics facility that can overcome known technology shortcoming, described device can be quantified
And image is probed into and demonstrates fluid pressure and fluid velocity and the relation of Bernoulli equation, improves the learning interest of student.
To achieve the above object, the technical scheme is that：One base is set, and parallel two pieces of installation is separated with base
The riser of distance, installs blast fan between two risers, and impeller axle two ends are supported in the through hole opened on two risers, wherein
One end is connected with a motor for being arranged on adjustable speed on riser, and one group of small pressure is provided with the front of another riser
Meter, the U-tube of small pressure gage is fixed in plate face, and graduated scale, the probe or pressure sensing of small pressure gage are carved with plate face
Device is arranged in the chute set in a plate face, and chute is the through hole communicated with the back side, and each probe positions is adjustable, and impression is different
The wind speed of position.
Using such scheme, the relation of flow velocity and pressure in fluid can be visually experienced by testing student, so that
Bernoulli's theorem is more fully understood, the purpose of the present invention is realized.
Scheme is described in more detail with reference to diagram and embodiment.
Brief description of the drawings
Fig. 1 is the front view of gas flow rate and pressure relation demonstration instrument；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is A direction views in Fig. 2.
Numbered in diagram：1st, impeller support shaft, 2, speed-regulated DC motor, 3, the impeller disk, 4, impeller blade, 5, left support plate,
6th, emulsion tube, 7, geometrical clamp, 8, small pressure gage, 9, graduated scale, 10, base, 11, right support plate, 12, bearing, 13, speed governing
Device, 14, dc source, 15, horizontal concrete chute.
Specific embodiment
As shown in Figures 1 and 2, shown demonstrator supports two risers, including left support plate 5 by base 10, right support plate 11,
There is hole to support an impeller support shaft 1 on two boards, one end of axle is connected with a speed-regulated DC motor 2, control 3 turns of the impeller disk
It is dynamic, one group of impeller blade 4 is distributed with the impeller disk, the impeller disk 3 produces wind-force when rotating, the front of left support plate 5 is micro- equipped with one group
Small pressure gage 8, the effective geometrical clamp 7 of u shapes of small pressure gage is fixed in plate face, and graduated scale 9 is carved with plate face, observes u shape pipes
The liquid level of interior color liquid, to measure pressure values, one end of U-tube is connected with emulsion tube 6, is above connected with the measurement of small pressure gage
The probe of head or pressure transducer, described measurement head or probe is arranged in a horizontal concrete chute 15, and tune can be slided in groove
Section position, chute is the through hole communicated with the back side, makes the wind that measurement head or probe contacts impeller blade 4 are produced, and experiences diverse location
The pressure that is brought of wind speed, the liquid level readings in pressure change u shape pipes that the pressure is formed.Or change motor speed can
Corresponding gas pressure intensity different in flow rate under same position is measured, the quantitative pass of gas pressure intensity and flow velocity is found by experimental data
System.Or keep the rotating speed of motor constant and change the probe positions of the measurement head of small pressure gage or pressure transducer, probe into leaf
The flow velocity of the position gas with various of wheel and the relation of pressure, further checking flow velocity and pressure relation and Bernoulli equation allow
Physiology solution flow velocity and pressure relation, it is readily appreciated that Bernoulli's theorem, make the effect of teaching more preferable.
Claims (1)
1. a kind of gas flow rate and pressure relation demonstration instrument, set a base（10）, on base it is parallel install two pieces be separated with away from
From riser, blast fan, impeller axle are installed between two risers（1）Two ends are supported in the through hole opened on two risers, its
Middle one end and a motor for being arranged on adjustable speed on riser（2）Be connected, the front of another riser be provided with one group it is small
Pressure gage（8）, the U-tube of small pressure gage is fixed in plate face, and graduated scale, the probe or pressure of small pressure gage are carved with plate face
Strong sensor is arranged on the chute set in a plate face（15）Interior, chute is the through hole communicated with the back side, and each probe positions can
Adjust, experience the wind speed of diverse location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176215.2A CN106910400A (en) | 2017-03-23 | 2017-03-23 | Gas flow rate and pressure relation demonstration instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176215.2A CN106910400A (en) | 2017-03-23 | 2017-03-23 | Gas flow rate and pressure relation demonstration instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106910400A true CN106910400A (en) | 2017-06-30 |
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ID=59193912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176215.2A Pending CN106910400A (en) | 2017-03-23 | 2017-03-23 | Gas flow rate and pressure relation demonstration instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106910400A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109064835A (en) * | 2018-09-03 | 2018-12-21 | 湖南工艺美术职业学院 | A kind of puzzle type occupational planning education device |
| CN109994027A (en) * | 2019-03-12 | 2019-07-09 | 菏泽学院 | A kind of experiment measuring device of pressure and change in flow relationship |
| CN114582207A (en) * | 2022-03-17 | 2022-06-03 | 四川建筑职业技术学院 | Demonstration instrument for relation between fluid pressure and flow velocity |
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| CN2543160Y (en) * | 2002-05-23 | 2003-04-02 | 林宇翀 | Bernoulli equation schematic demonstrator |
| CN1508548A (en) * | 2002-12-13 | 2004-06-30 | 中国科学院生态环境研究中心 | Method and apparatus for measuring very low fluid velocity |
| CN1587942A (en) * | 2004-09-23 | 2005-03-02 | 上海电力学院 | Method and device for measurnig multiple phase flow pressure |
| CN201570158U (en) * | 2009-07-23 | 2010-09-01 | 王颖 | Bernoulli principle demonstrator |
| CN202018374U (en) * | 2011-04-08 | 2011-10-26 | 刘自拔 | Small wind tunnel device convenient for observation and measurement |
| CN202549121U (en) * | 2012-03-01 | 2012-11-21 | 谢成强 | Bernoulli principle exploration instrument |
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| CN204946438U (en) * | 2015-08-01 | 2016-01-06 | 罗蕃莛 | A kind of experimental provision of bernoulli principle research |
| CN205354482U (en) * | 2016-01-09 | 2016-06-29 | 江苏华明科教设备有限公司 | Bernoulli's theorem presentation device |
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2017
- 2017-03-23 CN CN201710176215.2A patent/CN106910400A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2543160Y (en) * | 2002-05-23 | 2003-04-02 | 林宇翀 | Bernoulli equation schematic demonstrator |
| CN1508548A (en) * | 2002-12-13 | 2004-06-30 | 中国科学院生态环境研究中心 | Method and apparatus for measuring very low fluid velocity |
| CN1587942A (en) * | 2004-09-23 | 2005-03-02 | 上海电力学院 | Method and device for measurnig multiple phase flow pressure |
| CN201570158U (en) * | 2009-07-23 | 2010-09-01 | 王颖 | Bernoulli principle demonstrator |
| CN202018374U (en) * | 2011-04-08 | 2011-10-26 | 刘自拔 | Small wind tunnel device convenient for observation and measurement |
| CN202549121U (en) * | 2012-03-01 | 2012-11-21 | 谢成强 | Bernoulli principle exploration instrument |
| CN104575190A (en) * | 2013-10-15 | 2015-04-29 | 曾颖 | Bernoulli principle experiment instrument |
| CN204010440U (en) * | 2014-03-13 | 2014-12-10 | 柳州师范高等专科学校 | Bernoulli principle research device |
| CN104952325A (en) * | 2015-06-15 | 2015-09-30 | 南京新辉科教仪器有限公司 | Gas flow rate and pressure intensity inverse proportion demonstrator |
| CN204946438U (en) * | 2015-08-01 | 2016-01-06 | 罗蕃莛 | A kind of experimental provision of bernoulli principle research |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109064835A (en) * | 2018-09-03 | 2018-12-21 | 湖南工艺美术职业学院 | A kind of puzzle type occupational planning education device |
| CN109064835B (en) * | 2018-09-03 | 2020-06-05 | 湖南工艺美术职业学院 | Jigsaw type device for vocational planning education |
| CN109994027A (en) * | 2019-03-12 | 2019-07-09 | 菏泽学院 | A kind of experiment measuring device of pressure and change in flow relationship |
| CN114582207A (en) * | 2022-03-17 | 2022-06-03 | 四川建筑职业技术学院 | Demonstration instrument for relation between fluid pressure and flow velocity |
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Application publication date: 20170630 |