CN104751730B - A kind of bypass type laminar flow experiment voltage-stablizer and its method - Google Patents
A kind of bypass type laminar flow experiment voltage-stablizer and its method Download PDFInfo
- Publication number
- CN104751730B CN104751730B CN201510139039.6A CN201510139039A CN104751730B CN 104751730 B CN104751730 B CN 104751730B CN 201510139039 A CN201510139039 A CN 201510139039A CN 104751730 B CN104751730 B CN 104751730B
- Authority
- CN
- China
- Prior art keywords
- valve
- flow
- laminar flow
- voltage
- experiment
- 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
- 238000002474 experimental method Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 27
- 238000012360 testing method Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 abstract description 14
- 230000010355 oscillation Effects 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
- G09B25/025—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery hydraulic; pneumatic
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Educational Technology (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Jet Pumps And Other Pumps (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a kind of bypass type laminar flow experiment voltage-stablizer and its method.It has pumping line, valve, bypass details flow tube, vacuum tank and experimental channel feed pipe.Influenceed by water pump, the input water body pressure oscillation of the voltage-stablizer is very big.The pressure oscillation phenomenon of laminar flow experiment, bypass pipe is provided with the upper and lower side of valve during to eliminate low discharge.Laminar flow experiment is carried out when valve is fully closed, and now the fluctuating flow before valve can only be after bypass pipe flows to valve, the thickness length of its bypass pipe, just makes inflow-rate of water turbine control in the range of flow that can meet needed for laminar flow.Again through vacuum tank secondary pressure, when flowing to the output end of voltage-stablizer, just its precision of voltage regulation can be made to exist+Within 0.5 millimeter, thus the pressure-stabilizing water supply demand of laminar flow experiment under the conditions of water pump direct-furnish, can be met.Solves the problems, such as very scabrous laminar flow stable experiment under the conditions of water pump direct-furnish for a long time.This stable-pressure device, simple in construction, easy to operate, cost is cheap.
Description
Technical field
The present invention relates to teaching and experiment equipment.More particularly to a kind of bypass type laminar flow experiment voltage-stablizer and its method.
Background technology
In hydrodynamics hydraulics teaching experiment, on-way resistance experiment is a widely used base in universities
This experimental project.Its used on-way resistance experiment instrument, is generally directly supplied water by water pump, is a kind of self-loopa water supply experiment instrument
Device.This laboratory apparatus can have a strong impact on experimental precision and steady because of the pressure oscillation in self-loopa pipe-line system caused by water pump
It is qualitative, below by taking the on-way resistance experiment instrument of 7 millimeters of conventional experimental channels of tradition as an example, illustrate its technical background, hereinafter institute
The technical data being related to, using this example as background.
On-way resistance experiment includes laminar flow experiment and turbulent flow experiment content, the effect water of its turbulent flow requirement of experiment experimental channel
Head height, flow is big, and as above the lift of the supply-water pump described in example is 8-20 rice, and maximum stream flow is that 200-300 milliliters are per second, this height
The pump of lift can cause larger pressure oscillation, especially in low-pressure end up to several centimeters of water column or higher.Because laminar flow is tested
Stage, flow very little, its peak flow values are about 10 milliliters per second or so, and its laminar flow is lost about in 1-3 cm ranges（With water temperature
It is relevant）, therefore pressure oscillation caused by the self-circulation system of water pump direct-furnish makes laminar flow experiment can not almost be normally carried out.Separately
Outside, pipe laminar fluidised form will not produce pressure fluctuation in itself, if the laminar flow pressure surveyed, have obvious pulsation existing
As being not meet objective law, also against the basic conception of teaching.Therefore for experimental error or teaching request, it is intended to
In the laminar flow experimental stage, the pressure oscillation of measuring point is the smaller the better.
Traditionally voltage regulation way is rather than the mode of pressurizer tank by the way of vacuum tank.So-called pressurizer tank is water pump
Water has first been transported to one casing of free surface, the water body after casing voltage stabilizing, has resupplied experimental channel.Pressurizer tank voltage stabilizing supplies
Water is only applicable to the experimental system below 1 meter of acting head.And being tested along journey can be up in turbulent flow experimental stage, delivery head
10-20 rice, therefore pressurizer tank water supply is not fitted through, here it is traditionally on-way resistance experiment instrument can only pass through closed vacuum tank
The reason for supply water.If the vacuum tank is sufficiently large, along with shunting is handled, comparatively ideal voltage regulation result can be reached, such as
Upper example, through the present inventor's experimental study, show that the diameter of vacuum tank need to be up to more than 25 centimetres, then install isocon additional, by shunting
Processing, could reach voltage regulation result under laminar flow state+1 millimeter.This is a kind of existing best voltage regulation way.This voltage stabilizing
Following two problems be present in mode：First, high to the resistance to pressure request of vacuum tank, tank body manufacturing cost is big；Second, do not have in the market
This kind of tank body of voltage stabilizing requirement can be reached by having.Therefore presently used on-way resistance experiment instrument, in addition to the present inventor produces,
Without the on-way resistance experiment instrument using this big pressurized tank voltage stabilizing.What is used now is all small pressure tank, and its voltage stabilizing is imitated
Fruit is generally very poor, and voltage regulation result more than 4-6 millimeters is can only achieve under laminar condition.Even if voltage stabilizing like this, also must
Part flow arrangement need be installed additional, can be only achieved.It is that can not meet that teaching is real as experiment instrument of this kind of pressure oscillation more than 2 millimeters
Test requirement.
Such as how simplest structure solves the problems, such as the on-way resistance experiment instrument pressure stability of water pump direct-furnish with method, is
Problem anxious to be resolved in experimental teaching field.
The content of the invention
It is an object of the invention to provide a kind of bypass type laminar flow experiment voltage-stablizer and its method.To improve water pump direct-furnish along journey
The voltage regulation result of resistance experiment instrument, especially improve the voltage regulation performance in laminar flow stage.
Specific embodiments of the present invention are as follows：
A kind of bypass type laminar flow experiment voltage-stablizer has pumping line, valve, vacuum tank, bypass details flow tube and experiment
Piped water supply pipe, valve is provided with pumping line.
The diversion end of described bypass details flow tube is located on the preceding pipeline of valve, water side be located at valve and vacuum tank it
Between pipeline on；
Described vacuum tank is disposed between valve and experimental channel feed pipe.
The bypass type laminar-turbulent flow experimental method of the voltage-stablizer is：
When turbulent flow is tested, valve wide open, water flows through vacuum tank voltage stabilizing, is conveyed to experimental channel, this voltage stabilizing state is with passing
The existing voltage stabilizing state of system is identical, and the flow-shape in experimental channel is turbulent flow experimental state；
When carrying out laminar flow experiment, valve is fully closed, experiment water flows through bypass details flow tube wave absorption voltage stabilizing and current limliting output,
Vacuum tank is flowed into again, after vacuum tank voltage stabilizing, is conveyed to experimental channel, and the flow-shape in experimental channel tests shape for laminar flow
State.
The input water body of the voltage-stablizer is valve preceding pipeline current, and the output water body of voltage-stablizer is vacuum tank output channel water
Stream.Influenceed by water pump, the input water body pressure oscillation of the voltage-stablizer is very big.The pressure oscillation of laminar flow experiment during to eliminate low discharge
Phenomenon, the upper and lower side of valve is provided with bypass details flow tube.Laminar flow experiment is carried out when valve is fully closed, the now fluctuation before valve
Current can only be after bypass details flow tube flows to valve, and it bypasses the thickness length of details flow tube, inflow-rate of water turbine control is existed
It can meet in the range of flow needed for laminar flow.Because bypass details flow tube has good wave absorption pressure stabilization function, when this one rill
When amount water flows through bypass details flow tube and flowed to after valve, i.e., in the basicly stable state of pressure.Again through currently used small-sized voltage stabilizing
Tank（Such as the outer barrel of the water supply pipe filter of the cm of diameter 10）Secondary pressure, large-scale vacuum tank bonus point can be reached
The higher precision that stream device can reach.As above example, through experiment test, just its precision of voltage regulation can be made to exist+Within 0.5 millimeter, because
And the pressure-stabilizing water supply demand of laminar flow experiment under the conditions of water pump direct-furnish, can be met.Under the conditions of solving water pump direct-furnish for a long time
Very scabrous laminar flow stable experiment problem.This stable-pressure device, simple in construction, easy to operate, cost is cheap.
The invention has the advantages that：
1st, 1 millimetre-sized voltage regulation performance can be realized under the conditions of water pump direct-furnish, the voltage stabilizing that can fully meet laminar flow experiment supplies
Water demand.Solves the problems, such as very scabrous laminar flow stable experiment under the conditions of water pump direct-furnish for a long time；
2nd, the large-scale pressurized tank of in the market supply shortage is substituted for small pressure tank, may be omitted with the shunting in traditional experiment
Pipe；
3rd, ingenious to utilize fluid mechanics principle, simple in construction, cost is cheap, and voltage regulation result is good.
4th, as teaching experiment application innovation, it can motivate students' interest in learning, the creativity consciousness of student can be inspired, to training
It is beneficial to support innovation ability.
Brief description of the drawings
Fig. 1 is that a kind of bypass type laminar flow tests stabilizator structure schematic diagram, and each structural member title is as follows in figure：1 water pumps out
Water pipe, 2 valves, 3 vacuum tanks, 4 bypass details flow tubes, 5 experimental channel feed pipes.
Embodiment
As shown in figure 1, a kind of bypass type laminar flow experiment voltage-stablizer has pumping line 1, valve 2, vacuum tank 3, bypass
Details flow tube 4 and experimental channel feed pipe 5, valve 2 is provided with pumping line 1.
The diversion end of described bypass details flow tube 4 is located on the preceding pipeline of valve 2, and water side is located at valve 2 and voltage stabilizing
On pipeline between tank 3；
Described vacuum tank 3 is disposed between valve 2 and experimental channel feed pipe 5.
If between water pump and vacuum tank, install the valve of an adjustable aperture additional, entered using the aperture of control valve
Row flow-limiting voltage-stabilizing, it can also have the function that voltage stabilizing, but it is excessively troublesome, and teachers and students are reluctant to use.Because the current limliting of voltage stabilizing requires right and wrong
Often harsh, the too small requirement for not reaching laminar flow maximum stream flow, cause very much pressure oscillation greatly, more than allowed band.Shown in upper example
It is the most frequently used in teaching experiment, the flow of its laminar flow is only 10 milliliters of left and right per second, in pressure piping, controlling opening of valve
Laminar flow stage maximum stream flow scope, careless slightly as defined in reaching, will be bigger than normal or less than normal.And in readjustment, because commonly may be used
Control valve has an idle stroke, and operation more bothers.So traditionally always enter without the aperture using control valve
The stability regulation of row laminar flow.
To solve the above problems, and in view of being influenceed by water pump, the input water body pressure oscillation of the voltage-stablizer is very big.This hair
The pressure oscillation phenomenon of laminar flow experiment, bypass pipe is provided with the upper and lower side of valve during the bright low discharge for elimination.Laminar flow experiment exists
Carried out when valve is fully closed, now the fluctuating flow before valve can only be after bypass pipe flows to valve, the thickness length of its bypass pipe, just
Make inflow-rate of water turbine control well in the range of flow that can meet needed for laminar flow.Because bypass pipe has good wave absorption pressure stabilization function, when
When this one low discharge water flows through bypass pipe and flowed to after valve, i.e., in the basicly stable state of pressure, then through vacuum tank secondary pressure,
When flowing to the output end of voltage-stablizer, just its precision of voltage regulation can be made to exist+Within 0.5 millimeter, thus can under the conditions of water pump direct-furnish,
Meet the pressure-stabilizing water supply demand of laminar flow experiment.
The thickness of bypass details flow tube can be selected according to the thickness of experimental channel, and such as 0.7 millimeter of experimental channel is optional
With the flexible rubber hose of the millimeter of diameter 3.Accurate bypass details flow tube thickness length, is determined, it bypasses details flow tube by experiment
The flow passed through should can just meet the traffic requirement of laminar flow experiment.
The bypass type laminar-turbulent flow experimental method of the voltage-stablizer is：
When turbulent flow is tested, the standard-sized sheet of valve 2, water flows through the voltage stabilizing of vacuum tank 3, is conveyed to experimental channel, this voltage stabilizing state with
Traditional existing voltage stabilizing state is identical, and the flow-shape in experimental channel is turbulent flow experimental state；
When carrying out laminar flow experiment, valve 2 is fully closed, experiment water flows through bypass details flow tube wave absorption voltage stabilizing and current limliting is defeated
Go out, then be flowed into vacuum tank 3, after vacuum tank voltage stabilizing, be conveyed to experimental channel, the flow-shape in experimental channel is real for laminar flow
Test state.
No matter the empirical flow regulation of laminar flow or stage of turbulent flow, the flow control valve that can all pass through experimental channel end adjusts
Section.This voltage-stabilizing system can fill, and can not also fill isocon, and can reach voltage stabilizing requirement, the especially voltage stabilizing in laminar flow stage will
Ask.
Claims (2)
1. a kind of bypass type laminar flow tests voltage-stablizer, it is characterised in that it has pumping line（1）, valve（2）, vacuum tank
（3）, bypass details flow tube（4）With experimental channel feed pipe（5）, pumping line（1）On be provided with valve（2）；Described side
Logical details flow tube（4）Diversion end be located at valve（2）Preceding pipeline on, water side is located at valve（2）With vacuum tank（3）Between
On pipeline；Described vacuum tank（3）It is disposed on valve（2）With experimental channel feed pipe（5）Between.
A kind of 2. bypass type laminar-turbulent flow experimental method of voltage-stablizer as claimed in claim 1, it is characterised in that：
When turbulent flow is tested, valve（2）Standard-sized sheet, water flow through vacuum tank（3）Voltage stabilizing, is conveyed to experimental channel, the water in experimental channel
Stream fluidised form is turbulent flow experimental state；
When carrying out laminar flow experiment, by valve（2）Fully closed, experiment water flows through bypass details flow tube wave absorption voltage stabilizing and current limliting output,
Vacuum tank is flowed into again（3）, after vacuum tank voltage stabilizing, it is conveyed to experimental channel, the flow-shape in experimental channel is real for laminar flow
Test state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510139039.6A CN104751730B (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type laminar flow experiment voltage-stablizer and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510139039.6A CN104751730B (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type laminar flow experiment voltage-stablizer and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104751730A CN104751730A (en) | 2015-07-01 |
| CN104751730B true CN104751730B (en) | 2017-11-17 |
Family
ID=53591337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510139039.6A Expired - Fee Related CN104751730B (en) | 2015-03-27 | 2015-03-27 | A kind of bypass type laminar flow experiment voltage-stablizer and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104751730B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE500272C2 (en) * | 1992-07-20 | 1994-05-24 | Fludex Ab | Device for quick sectioning |
| CN2175955Y (en) * | 1993-12-04 | 1994-08-31 | 清华大学 | Multi-function mini-size hydraulic power testing instrument |
| CN2733333Y (en) * | 2004-10-12 | 2005-10-12 | 毛根海 | Small-sized self-circulating constant pressure water supply system |
| CN201196504Y (en) * | 2008-02-15 | 2009-02-18 | 凌建军 | Air conditioner with high-efficiency heat-production function in cold season |
| CN201373505Y (en) * | 2009-01-20 | 2009-12-30 | 山西新临钢钢铁有限公司 | Device for automatically controlling steam flow of steam heat supply system |
| CN102044184B (en) * | 2010-12-29 | 2012-07-25 | 中国矿业大学 | Fluid flow curve observation experiment device |
| CN102928327A (en) * | 2012-11-13 | 2013-02-13 | 中国水电顾问集团中南勘测设计研究院 | Circulating water pressure regulating device for seepage deformation test |
| CN103308125B (en) * | 2013-06-07 | 2016-01-20 | 中国人民解放军国防科学技术大学 | A kind of Flows stable control method |
| CN204614340U (en) * | 2015-03-27 | 2015-09-02 | 杭州源流科技有限公司 | A kind of bypass type laminar flow experiment voltage stabilizer |
-
2015
- 2015-03-27 CN CN201510139039.6A patent/CN104751730B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104751730A (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204576913U (en) | A kind of Multifunction hydrodynamic calculations platform | |
| CN204833838U (en) | Comprehensive design nature hydraulics experiment platform | |
| CN201804480U (en) | Reynolds experiment device | |
| CN104359661A (en) | Universal valve performance test device | |
| CN108877429A (en) | A kind of hydrodynamics comprehensive experimental device | |
| CN108917890B (en) | Durability test device of flow metering device | |
| CN107121177B (en) | Standard device integrating open channel and pipeline sewage flow | |
| WO2010004255A3 (en) | Apparatus and method for characterising fluid flow through a pipe | |
| CN104751730B (en) | A kind of bypass type laminar flow experiment voltage-stablizer and its method | |
| CN203520715U (en) | Comprehensive hydromechanics device capable of being freely combined | |
| CN204614340U (en) | A kind of bypass type laminar flow experiment voltage stabilizer | |
| CN204557885U (en) | A kind of throttle-type bistable formula on-way resistance experiment instrument | |
| CN204554215U (en) | A kind of throttle type laminar flow experiment voltage stabilizer | |
| CN204557884U (en) | A kind of bypass type bistable formula on-way resistance experiment instrument | |
| CN104778881A (en) | Throttling type bistable on-way resistance experiment instrument and method thereof | |
| CN201724937U (en) | Closely circulated perfusion system | |
| CN105203295A (en) | Measuring device and method for measuring friction resistance of fracturing fluid | |
| CN209464982U (en) | A kind of jet stream attaches device | |
| CN104778883B (en) | A kind of bypass type bistable formula on-way resistance experiment instrument and its method | |
| CN100416254C (en) | Experimental apparatus for pressure regulating chamber teaching | |
| CN104596748B (en) | A kind of discharge assay device of air pipe head | |
| CN203453563U (en) | Double-pipe balance valve | |
| CN104776291A (en) | Throttle type laminar experiment pressure stabilizer and method thereof | |
| CN102982710A (en) | Reynolds experiment apparatus | |
| CN203515531U (en) | Filling pipeline based on balance tank instillation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |