CN204554215U - A kind of throttle type laminar flow experiment voltage stabilizer - Google Patents
A kind of throttle type laminar flow experiment voltage stabilizer Download PDFInfo
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- CN204554215U CN204554215U CN201520178433.6U CN201520178433U CN204554215U CN 204554215 U CN204554215 U CN 204554215U CN 201520178433 U CN201520178433 U CN 201520178433U CN 204554215 U CN204554215 U CN 204554215U
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- throttle orifice
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Abstract
The utility model discloses a kind of throttle type laminar flow experiment voltage stabilizer.It has pumping line, the valve being with throttle orifice, surge tank and experimental channel water pipe, and the valve plate of valve has one or more throttle orifice.When valve complete shut-down, draw before valve and flow to experimental channel from the pressure water of water pump through throttle orifice.When this one small flow flows through throttle orifice, throttle orifice can eliminate water body pressure surge before the valve caused because of water pump very well, plays good wave absorption pressure stabilization function.Again through surge tank secondary pressure, its precision of voltage regulation is existed
+within 0.5 millimeter, thus under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met.Very scabrous laminar flow stable experiment problem under solving the condition of water pump direct-furnish for a long time.This stable-pressure device, structure is simple, easy to operate, with low cost.The utility model device can also be used in the high small flow system of voltage regulation performance requirement.
Description
Technical field
The utility model relates to teaching and experiment equipment.Particularly relate to a kind of throttle type laminar flow experiment voltage stabilizer.
Background technique
In fluid mechanics hydraulics education experiment, a basic experiment project very is widely applied in on-way resistance experiment in universities.The on-way resistance experiment instrument that it uses, is directly supplied water by water pump usually, is a kind of self-loopa water supply laboratory apparatus.Pressure surge in the self-loopa pipe-line system that this laboratory apparatus causes because of water pump, can have a strong impact on experimental precision and stability.The on-way resistance experiment instrument of the 7 millimeters of experimental channels commonly used for tradition below, illustrates its technical background, technical data involved in below illustrating, all with this example for background.
On-way resistance experiment comprises laminar flow experiment and turbulent flow experiment content, the acting head of its turbulent flow requirement of experiment experimental channel is high, flow is large, as above the water supply lift of pump described in example is 8-20 rice, peak rate of flow is that 200-300 milliliter is per second, this high-lift pump can cause larger pressure surge, especially can reach the water column or higher of several centimetres at low voltage terminal.Due to the laminar flow experimental stage, flow is very little, its peak flow values is about about 10 milliliters per second, and the loss of its laminar flow is about 1-3 cm range (relevant with water temperature), and the pressure surge that the self-circulation system of therefore water pump direct-furnish produces makes laminar flow experiment almost cannot normally carry out.In addition, pipe laminar fluidised form itself can not produce pressure pulsation, if the laminar flow pressure surveyed, having obvious pulsation phenomenon, is do not meet objective law, also against teaching basic conception.Therefore from experimental error or teaching request, all wish that, in the laminar flow experimental stage, the pressure surge of measuring point is the smaller the better.
Voltage regulation way is the mode adopting surge tank traditionally, instead of the mode of pressure stabilizer.So-called pressure stabilizer is that water has first been transported to free surface casing by water pump, and the water body after casing voltage stabilizing, resupplies experimental channel.Pressure stabilizer pressure-stabilizing water supply is only applicable to the experimental system of acting head less than 1 meter.And along journey experiment in the turbulent flow experimental stage, delivery head can, up to 10-20 rice, be therefore not suitable for being supplied water by pressure stabilizer, the on-way resistance experiment instrument reason that can only be supplied water by airtight surge tank traditionally that Here it is.If this surge tank is enough large, adds shunting process, comparatively ideal voltage regulation result can be reached, such as go up example, through the utility model people experimental research, show that the diameter of surge tank need reach more than 25 centimetres, install ram's horns additional again, through shunting process, could under laminar flow state, voltage regulation result be reached
+1 millimeter.This is existing best a kind of voltage regulation way.There is following two problems in this voltage regulation way: one is high to surge tank requirement of withstand voltage, and tank body manufacture cost is large; Two is this kind of tank bodies not reached voltage stabilizing requirement in the market.Therefore on-way resistance experiment instrument used at present, except the utility model people produces, has not adopted the on-way resistance experiment instrument of this large pressurized tank voltage stabilizing.Present employing be all small pressure tank, its voltage regulation result is generally very poor, can only reach the voltage regulation result of more than 4-6 millimeter under laminar condition.Even if voltage stabilizing like this, also must install part flow arrangement additional, just can reach.Resemble the experiment instrument of this kind of pressure surge more than 2 millimeters, education experiment requirement can not be met.
As how the simplest structure and method solves the on-way resistance experiment instrument pressure stability problem of water pump direct-furnish, it is a difficult problem anxious to be resolved in experimental teaching field.
Summary of the invention
The purpose of this utility model is to provide a kind of throttle type laminar flow experiment voltage stabilizer, to improve the voltage regulation result of water pump direct-furnish on-way resistance experiment instrument, especially improves the voltage regulation performance in laminar flow stage.
The technical solution of the utility model is as follows:
A kind of throttle type laminar flow experiment voltage stabilizer has pumping line, band throttle orifice valve, surge tank and experimental channel water pipe; Pumping line is provided with band throttle orifice valve.
Described band throttle orifice valve, the movable valve plate of its valve closing has one or more throttle orifice.Described surge tank is arranged between band throttle orifice valve and experimental channel water pipe.
When valve complete shut-down, draw before valve and flow to experimental channel from the pressure water of water pump through throttle orifice.When this one small flow flows through throttle orifice, throttle orifice can eliminate water pressure fluctuations before the valve caused because of water pump very well, plays good wave absorption pressure stabilization function.Again through at present conventional small-sized surge tank (urceolus as the water supply pipe filter of diameter 10 cm) secondary pressure, just can reach large-scale surge tank and add the more highi degree of accuracy that part flow arrangement can reach, as above routine through experiment test, its precision of voltage regulation exists
+within 0.5 millimeter.Thus under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met completely.Very scabrous laminar flow stable experiment problem under solving the condition of water pump direct-furnish for a long time.This stable-pressure device, structure is simple, easy to operate, with low cost.
The beneficial effect that the utility model compared with prior art has is:
1, under water pump direct-furnish condition, 1 millimetre-sized voltage regulation performance can be realized, the pressure-stabilizing water supply demand of laminar flow experiment can be met completely.Very scabrous laminar flow stable experiment problem under solving the condition of water pump direct-furnish for a long time;
2, substituted for the large-scale pressurized tank run out of goods in market with small pressure tank, the ram's horns in traditional experiment can also be saved;
3, ingeniously utilize fluid mechanics principle, structure is simple, and with low cost, voltage regulation result is good.
4, as education experiment application innovation, the creativity consciousness of the student that can motivate students' interest in learning, inspire is useful to cultivation innovation ability.
Accompanying drawing explanation
Fig. 1 is a kind of throttle type laminar flow experiment stabilizator structure schematic diagram, and in figure, each structural member title is as follows: 1 pumping line, the valve of 2 band throttle orifices, 3 surge tanks, 4 experimental channel water pipes, 5 movable valve plates.
Embodiment
As shown in Figure 1, a kind of throttle type laminar flow experiment voltage stabilizer has pumping line 1, band throttle orifice valve 2, surge tank 3 and experimental channel water pipe 4; Pumping line 1 is provided with band throttle orifice valve 2.
Described band throttle orifice valve 2, the movable valve plate 5 of its valve closing has one or more throttle orifice.Described surge tank 3 is arranged between band throttle orifice valve 2 and experimental channel water pipe 4.
If between water pump and surge tank, install the valve of an adjustable aperture additional, utilize the aperture of regulating valve to carry out flow-limiting voltage-stabilizing, also can reach the effect of voltage stabilizing, but too bother, teachers and students are reluctant to adopt.Because it is very harsh that the current limliting of voltage stabilizing requires, the too little requirement not reaching laminar flow peak rate of flow, causes pressure surge too greatly, exceedes allowed band.Be the most frequently used in education experiment shown in upper example, the flow of its laminar flow is only 10 milliliters of left and right per second, and in high pressure pipe line, controlling opening of valve will reach the laminar flow stage peak rate of flow scope of regulation, careless slightly, will be bigger than normal or less than normal.And when adjusting back, Yin Putong adjustable gate has an idle stroke, operation bothers more.So, never adopt the aperture of regulating valve to regulate to the stability carrying out laminar flow traditionally.
For solving the problem, and consider and to affect by water pump, the input water body pressure surge of this voltage stabilizer is very large.The utility model is the pressure surge phenomenon of laminar flow experiment when eliminating small flow, and valve offers throttle orifice.Laminar flow experiment is carried out when valve complete shut-down, and the fluctuating flow now before valve can only after throttle orifice flow valves, the size of throttle orifice, just in time makes inflow-rate of water turbine control can meet in the range of flow needed for laminar flow.Because throttle orifice has good wave absorption pressure stabilization function, when these one small flow current flow to after valve through throttle orifice, be namely in the basicly stable state of pressure, then through surge tank secondary pressure, when flowing to the output terminal of voltage stabilizer, its precision of voltage regulation just can be made to exist
+within 0.5 millimeter, thus under water pump direct-furnish condition, the pressure-stabilizing water supply demand of laminar flow experiment can be met.
The size of pressurized tank can the thickness of experimentally pipeline be selected, and as the experimental channel of 0.7 millimeter, can select the urceolus of the water supply pipe filter of diameter 10 cm.Throttle orifice size and hole count test according to maximum laminar flow to determine, requires that, when in throttle orifice valve 2 complete shut-down situation, its inflow-rate of water turbine can meet the traffic requirement of laminar flow experiment.
Examination on experimental operation:
During turbulent flow experiment, band throttle orifice valve 2 standard-sized sheet, current, through surge tank 3 voltage stabilizing, flow to experimental channel, and this voltage stabilizing state is identical with traditional existing voltage stabilizing state, and the flow-shape in experimental channel is turbulent flow experimental state;
When carrying out laminar flow experiment, will be with throttle orifice valve 2 complete shut-down, test current through the voltage stabilizing of throttle orifice wave absorption and current limliting output, then flow into surge tank 3, after surge tank voltage stabilizing, flow to experimental channel, the flow-shape in experimental channel is laminar flow experimental state.
No matter the empirical flow of laminar flow or stage of turbulent flow regulates, all by the Flow-rate adjustment valve regulation of experimental channel end.This voltage-stabilizing system can fill, and also can not fill ram's horns, all can reach voltage stabilizing requirement, especially the voltage stabilizing requirement in laminar flow stage.
Claims (3)
1. a throttle type laminar flow experiment voltage stabilizer, is characterized in that it has pumping line (1), band throttle orifice valve (2), surge tank (3) and experimental channel water pipe (4); Pumping line (1) is provided with band throttle orifice valve (2).
2. a kind of throttle type laminar flow experiment voltage stabilizer according to claim 1, is characterized in that described band throttle orifice valve (2), the movable valve plate (5) of its valve closing has one or more throttle orifice.
3. a kind of throttle type laminar flow experiment voltage stabilizer according to claim 1, is characterized in that described surge tank (3) is arranged between band throttle orifice valve (2) and experimental channel water pipe (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178433.6U CN204554215U (en) | 2015-03-27 | 2015-03-27 | A kind of throttle type laminar flow experiment voltage stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520178433.6U CN204554215U (en) | 2015-03-27 | 2015-03-27 | A kind of throttle type laminar flow experiment voltage stabilizer |
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| Publication Number | Publication Date |
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| CN204554215U true CN204554215U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520178433.6U Expired - Fee Related CN204554215U (en) | 2015-03-27 | 2015-03-27 | A kind of throttle type laminar flow experiment voltage stabilizer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776291A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Throttle type laminar experiment pressure stabilizer and method thereof |
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2015
- 2015-03-27 CN CN201520178433.6U patent/CN204554215U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776291A (en) * | 2015-03-27 | 2015-07-15 | 浙江大学 | Throttle type laminar experiment pressure stabilizer and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20200327 |