CN107044872B - Micro liquid flowmeter - Google Patents
Micro liquid flowmeter Download PDFInfo
- Publication number
- CN107044872B CN107044872B CN201710341571.5A CN201710341571A CN107044872B CN 107044872 B CN107044872 B CN 107044872B CN 201710341571 A CN201710341571 A CN 201710341571A CN 107044872 B CN107044872 B CN 107044872B
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- fluid
- testing
- gear
- test
- liquid flowmeter
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a micro liquid flowmeter, which solves the technical problems that when the existing micro liquid flowmeter is used for testing, the running direction of a test gear is unstable, the running direction of the test gear is unstable, the test gear is in frequent rotation in the forward and reverse directions, the test gear is in steady running, a period of time is required for the test gear to run, the impact can influence the testing precision, the service life of the test gear is reduced, and the service lives of a gear shaft and a bearing are influenced. The invention can be widely applied to flow test of micro liquid.
Description
Technical Field
The present invention relates to a flowmeter, and more particularly to a micro-fluid flowmeter.
Background
When the fluid enters the fluid testing cavity to push the intermeshing gears in the fluid testing cavity to rotate, linear sealing is formed between gear teeth of the intermeshing gears, the outer circumference of the gear teeth of the gears and the inner wall of the fluid testing cavity are also in linear sealing, and the flow of the fluid can be measured through the revolution of the testing gears.
When the conventional micro liquid flowmeter is tested, as shown in fig. 1, fluid entering the fluid testing cavity 3 through the fluid inlet 6 can impact the intermeshing testing gear 4 inside the testing cavity 3, the fluid is impacted on the testing gear 4 in a straight line through the fluid inlet 6, when the impact is instant, the impact force applied to the testing gear 4 is dispersed, the fluid in the tooth gap between two gear teeth can simultaneously generate acting force on two adjacent gear teeth, so that the running direction of the testing gear 4 can be unstable, the intermeshing testing gear 4 can form frequent impact and rotation in the forward and reverse directions, the testing gear 4 needs a period of time to form steady operation, the impact can influence the testing precision, the service life of the testing gear 4 can be reduced, and the service lives of the testing gear spindle 5 and the bearing can be influenced.
Disclosure of Invention
The invention aims to solve the technical problems that when the conventional micro liquid flowmeter is used for testing, fluid entering a fluid testing cavity through a fluid inlet can impact mutually meshed testing gears in the testing cavity, the fluid can not impact the mutually meshed testing gears in the testing cavity through the fluid inlet, when the impact is instant, the impact force direction of the testing gears is dispersed, the running direction of the testing gears can be unstable, the mutually meshed testing gears can form frequent rotation in the positive direction and the negative direction, the running direction of the testing gears can be unstable, the stable running of the testing gears needs a period of time, the impact can influence the testing precision, the service life of the testing gears can be reduced, meanwhile, the service lives of a gear shaft and a bearing can be influenced, the fluid entering the fluid testing cavity through the fluid inlet can not impact the mutually meshed testing gears in the testing cavity, the fluid can not directly impact the testing gears through the fluid inlet, the impact force direction of the testing gears is stable, the running direction of the mutually meshed testing gears can not form frequent rotation in the positive direction and the negative direction, the stable running of the testing gears can not form stable running, the stable running of the testing gears can not influence the service life of the testing gears, the life of the micro liquid flowmeter can not be influenced, and the service life of the micro liquid flowmeter can not be prolonged.
The technical scheme of the invention for solving the technical problems is that the micro liquid flowmeter is provided with a shell, a fluid testing cavity is arranged in the shell, a fluid inlet is arranged on one side of the fluid testing cavity, a fluid outlet is arranged on the other side of the fluid testing cavity, a pair of mutually meshed testing gears are arranged in the fluid testing cavity, and a fluid diversion inlet is arranged between the fluid inlet and the fluid testing cavity.
Preferably, the fluid diversion inlet arranged between the fluid inlet and the fluid testing cavity is two paths, and the two paths of fluid diversion inlets are symmetrically arranged relative to the axis of the fluid inlet.
Preferably, the test gear employs a positive displacement involute cylindrical gear.
Preferably, the positive displacement coefficient of the involute cylindrical gear is 0.05-0.15.
Preferably, the positive displacement coefficient of the involute cylindrical gear is 0.1.
Preferably, the test gear material is PEEK.
The micro liquid flowmeter has the advantages that the micro liquid flowmeter is provided with the shell, the fluid testing cavity is arranged in the shell, the fluid inlet is formed in one side of the fluid testing cavity, the fluid outlet is formed in the other side of the fluid testing cavity, the pair of gears meshed with each other are arranged in the fluid testing cavity, the fluid split inlet is formed between the fluid inlet and the fluid testing cavity, when in testing, fluid entering the fluid testing cavity through the fluid inlet cannot impact the meshed testing gears in the testing cavity, the fluid cannot directly impact the testing gears through the fluid inlet, the impact force applied to the testing gears is stable, the running direction of the testing gears is stable, the meshed testing gears cannot frequently rotate in the positive direction and the negative direction, the testing gears can immediately form steady running, the testing accuracy cannot be affected, the service life of the testing gears cannot be reduced, and meanwhile the service lives of the gear shafts and the bearings cannot be affected.
Drawings
FIG. 1 is a schematic diagram of a conventional micro-fluid flow meter;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of the present invention.
The symbols in the drawings illustrate:
1. a fluid outlet; 2. a housing; 3. a fluid testing chamber; 4. testing a gear; 5. a gear spindle; 6. a fluid inlet; 7. a fluid diversion inlet.
Examples
The invention is further described below with reference to examples.
Fig. 2-3 show an embodiment of the invention, and fig. 2 shows an embodiment of the invention in a profile view, in which the bottom of the fluid inlet 6 is provided with two fluid diversion inlets 7.
Fig. 3 is a cross-sectional view of an embodiment of the present invention, where it can be seen that a micro liquid flowmeter is provided with a housing 2, a fluid testing cavity 3 is provided inside the housing 2, a fluid inlet 6 is provided on one side of the fluid testing cavity 3, a fluid outlet 1 is provided on the other side of the fluid testing cavity 3, a pair of test gears 4 meshed with each other are provided inside the fluid testing cavity 3, a fluid diversion inlet 7 is provided between the fluid inlet 6 and the fluid testing cavity 3, two fluid diversion inlets 7 are provided between the fluid inlet 6 and the fluid testing cavity 3, and the two fluid diversion inlets 7 are symmetrically arranged with respect to the axis of the fluid inlet 7. When the test fluid enters the fluid test cavity 3 through the fluid inlet 6, the fluid can form split flow because the fluid split inlet 7 is arranged between the fluid inlet 6 and the fluid test cavity 3, the split flow respectively enters the left and right fluid split inlets 7, the split flow can respectively drive the test gear 4 to rotate, the problem of disturbance of impact force can not occur, the test gears 4 meshed together can be stably started, and the flow test of the fluid is started, so that the structure provided with the fluid split inlet 7 is particularly suitable for the flow test of tiny liquid. Meanwhile, the test gears 4 meshed with each other are stable in impact force, so that the impact force of the gear main shaft 5 and the bearing is small, and the service life is long. In this embodiment, the axis of the fluid diversion inlet 7 and the gear spindle 5 intersect, so that when fluid enters the fluid testing cavity 3 through the fluid diversion inlet 7, the stress of the testing gear 4 is more uniform and stable.
The test gear 4 in this embodiment adopts positive displacement involute cylindrical gear, after adopting positive displacement coefficient, the tooth height of the tooth of the test gear 4 can be increased, the linear engagement between the teeth is more favorable, the linear distance of the mutual engagement movement is longer, the test is more accurate, the linearity of flow test of tiny liquid is better, through experimental analysis, the positive displacement coefficient of the involute cylindrical gear 4 is 0.05-0.15, the test precision can be improved and improved, and especially when the positive displacement coefficient is 0.1, the effect of improving the test precision is very obvious.
The material of the test gear 4 in this embodiment is PEEK, most of the conventional processes adopt stainless steel 316L as the material of the test gear 4, and although the cost is low, the 316L has good corrosion resistance to various media, but the weight is heavy, which is unfavorable for rapid start of the flowmeter, and is especially unsuitable for testing the flow of tiny liquid, meanwhile, the stainless steel material has high hardness and is difficult to process, the material of the test gear 4 is PEEK, the weight is light, the test can be started immediately when the flowmeter tests fluid, and meanwhile, the PEEK material is corrosion resistant, and easy to process.
However, the foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the invention are intended to fall within the scope of the claims.
Claims (6)
1. The utility model provides a tiny liquid flowmeter, its is equipped with the shell, the inside fluid test cavity that is equipped with of shell, fluid test cavity one side is equipped with the fluid entry, fluid test cavity opposite side is equipped with the fluid export, fluid test cavity inside is equipped with a pair of intermeshing's test gear, characterized by fluid entry and fluid test cavity between be equipped with the fluid split stream entry.
2. The minute liquid flowmeter of claim 1, wherein the fluid diverting inlet provided between the fluid inlet and the fluid testing chamber is two-way, the two-way fluid diverting inlet being symmetrically arranged with respect to the fluid inlet axis.
3. The minute liquid flowmeter of claim 1, wherein said test gear is a positive displacement involute spur gear.
4. The minute liquid flowmeter according to claim 3, wherein said involute cylindrical gear has a positive displacement coefficient of 0.05-0.15.
5. The minute liquid flowmeter according to claim 4, wherein said involute cylindrical gear has a positive displacement coefficient of 0.1.
6. A minute liquid flowmeter according to claim 3, characterised in that said test gear material is PEEK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341571.5A CN107044872B (en) | 2017-05-16 | 2017-05-16 | Micro liquid flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710341571.5A CN107044872B (en) | 2017-05-16 | 2017-05-16 | Micro liquid flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107044872A CN107044872A (en) | 2017-08-15 |
| CN107044872B true CN107044872B (en) | 2023-09-05 |
Family
ID=59546054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710341571.5A Active CN107044872B (en) | 2017-05-16 | 2017-05-16 | Micro liquid flowmeter |
Country Status (1)
| Country | Link |
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| CN (1) | CN107044872B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591500A (en) * | 2018-07-18 | 2018-09-28 | 天津万枫仪表有限公司 | Special alloy regulating valve applied to high-pressure minimum flow working condition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5992230A (en) * | 1997-11-15 | 1999-11-30 | Hoffer Flow Controls, Inc. | Dual rotor flow meter |
| JP2002250646A (en) * | 2001-02-23 | 2002-09-06 | Nippon Grease Nipple Kk | Gearing for flow measurement |
| CN102927002A (en) * | 2012-12-04 | 2013-02-13 | 泸州众大科技液压件有限公司 | High-pressure gear pump |
| CN205619982U (en) * | 2016-05-18 | 2016-10-05 | 其胜威纳(上海)润滑设备有限公司 | Online flow detection device of high accuracy |
| CN206862416U (en) * | 2017-05-16 | 2018-01-09 | 威海坤科流量仪表股份有限公司 | A kind of fine liquid flowmeter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE375576T1 (en) * | 2001-05-11 | 2007-10-15 | Roper Pump Company | IMPROVED FLUID COUNTER DEVICE |
| EP2060740A1 (en) * | 2007-11-14 | 2009-05-20 | Roper Pump Company | Fluid metering and pumping device |
-
2017
- 2017-05-16 CN CN201710341571.5A patent/CN107044872B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5992230A (en) * | 1997-11-15 | 1999-11-30 | Hoffer Flow Controls, Inc. | Dual rotor flow meter |
| JP2002250646A (en) * | 2001-02-23 | 2002-09-06 | Nippon Grease Nipple Kk | Gearing for flow measurement |
| CN102927002A (en) * | 2012-12-04 | 2013-02-13 | 泸州众大科技液压件有限公司 | High-pressure gear pump |
| CN205619982U (en) * | 2016-05-18 | 2016-10-05 | 其胜威纳(上海)润滑设备有限公司 | Online flow detection device of high accuracy |
| CN206862416U (en) * | 2017-05-16 | 2018-01-09 | 威海坤科流量仪表股份有限公司 | A kind of fine liquid flowmeter |
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| Publication number | Publication date |
|---|---|
| CN107044872A (en) | 2017-08-15 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| CB02 | Change of applicant information |
Address after: 264209 west one or two West of Weihai high tech District, Weihai, Shandong Province Applicant after: WEIHAI KUNKE FLOW METER CO.,LTD. Address before: No. 194, hi tech Development Zone, Weihai, Shandong Province Applicant before: WEIHAI KUNKE FLOW METER Co.,Ltd. |
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