CN205384057U - Class tangential turbine flowmeter - Google Patents
Class tangential turbine flowmeter Download PDFInfo
- Publication number
- CN205384057U CN205384057U CN201620125538.XU CN201620125538U CN205384057U CN 205384057 U CN205384057 U CN 205384057U CN 201620125538 U CN201620125538 U CN 201620125538U CN 205384057 U CN205384057 U CN 205384057U
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- CN
- China
- Prior art keywords
- impeller
- water conservancy
- turbine flowmeter
- conservancy diversion
- tangential
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- 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.)
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Abstract
The utility model provides a class tangential turbine flowmeter, its include preceding baffle with the back baffle, be equipped with the impeller in the back baffle, the impeller passes through the main shaft and sends out news dish linkage cooperation, preceding baffle includes water conservancy diversion portion and rectification portion, water conservancy diversion portion circumference distribution water conservancy diversion piece, the contained angle has between water conservancy diversion piece and the flow directn, the blade of impeller and the contained angle more than or equal to 0 between the flow directn, and be less than 30, form the slant campaign or the vortex through preceding baffle rectification, resolve into tangential force and axial force with the medium through water conservancy diversion portion power, the tangential force will act on rotating impeller, and the axial force is born by water conservancy diversion portion, make the impeller not receive axial force or receive minimum axial force, thereby reduce bearing axial atress greatly, it is nimble to reach rotating impeller, the instrument precision is high, improve flowmeter life greatly, put forward the high impact resistance ability greatly.
Description
Technical field
This utility model relates to metering field, specifically discloses a tangential turbine flowmeter of kind.
Background technology
Turbine flowmeter is the important instrument of air-liquid body metering, it has, and crushing is little, precision compared with high, initial-flow is little, fault time not gas shutoff, range of flow width, the advantage such as reproducible, capacity of resisting disturbance is strong.It is widely used in gas, industry, the metering of chemical industry air-liquid body.Turbine flowmeter operation principle (Fig. 1 and Fig. 2): pipeline medium acts on impeller by (direct current) after baffle rectification before turbine flowmeter, blade is angled with axial turbine, fluid dynamic effect is broken down into tangential force and axial force (Fig. 3) on the impeller vanes, tangential force overcomes bearing friction power to drive wheel rotation, then main shaft (also having main shaft not rotate, bearing is directly installed in impeller), sender set is driven to rotate thus obtaining the pulse signal (also have and directly pick up pulse signal on impeller) being directly proportional to flow；And axial force is very harmful, one is to increase rotary resistance affects precision, and two is reduce bearing service life.Little in order to reach high accuracy and initial-flow, gas-turbine is all adopt high-precision, less deep groove ball bearing as the core part reducing wheel rotation frictional force, and gas turbine meter impeller blade lead angle is usually designed between 30 ° ~ 60 °；Liquid turbine is then adopt less lead angle and adopt sliding bearing.The shortcoming of turbine flowmeter is: require medium compared with clean, impulsive force is little, pressure medium is less.Also have a kind of tangential turbine flowmeter, fluid tangentially flowing through by impeller, impact its blade and rotate (Fig. 4).Owing to measured flux is little, for the larger fluid impulse force to impeller, porch is equipped with nozzle, it is possible to change nozzle bore to regulate range of flow.The rotating speed of impeller adopts photoelectric method detection, and to avoid such as magnetoresistance method to produce magnetic resistance moment, this kind of tangential turbine flowmeter is only applicable to small-bore pipeline (DN≤20mm), and low discharge measures.
Utility model content
In order to solve the problems referred to above, this utility model provides the tangential turbine flowmeter of class.
This utility model provides: a tangential turbine flowmeter of kind, it includes front baffle and rear baffle, it is provided with impeller in described rear baffle, described impeller is linked by main shaft and sender set, described front baffle includes diversion division and rectification part, the circumferentially distributed flow deflector of described diversion division, has angle between described flow deflector and flow direction, angle between blade and the flow direction of described impeller is be more than or equal to 0 °, and less than 30 °.
Described flow deflector and flow direction bevel or become lead angle.
Described flow deflector includes parallel portion 9 and oblique angle portion 10, smoothly transits between parallel portion and oblique angle portion.
Described parallel portion is positioned at the import department of front baffle, and described mitred sections is in the position near impeller.
Described flow deflector is 10, is equidistantly circumferentially distributed in front baffle.
Described lead angle is 45 °.
This utility model forms oblique movement or eddy current by front baffle rectification, by medium by diversion division power decomposition tangentially power and axial force, tangential force will act on wheel rotation, and axial force is born by diversion division, make impeller not by axial force or by minimum axial force, thus being greatly reduced bearing axially loaded, reaching wheel rotation flexible, accuracy of instrument is high, be greatly improved effusion meter service life, be greatly improved impact resistance.
Accompanying drawing explanation
Fig. 1 is the structural representation of turbine flowmeter.
Fig. 2 is the generalized section of A-A in Fig. 1.
Fig. 3 is turbine flowmeter impeller force analysis figure.
Fig. 4 is the structural representation of tangential turbine flowmeter.
Fig. 5 is structural representation of the present utility model.
Force analysis figure when Fig. 6 a is impeller blade of the present utility model 0 °.
Force analysis figure when Fig. 6 b is impeller blade low-angle of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model embodiment is described further:
As shown in Figure 5, this utility model provides a tangential turbine flowmeter of kind, it includes front baffle 1 and rear baffle 3, it is provided with impeller 2 in described rear baffle 3, described impeller 2 is linked by main shaft 7 and sender set 8, in rear baffle 3, movement 6 is set, main shaft 7 is linked through movement 6 and sender set 8, on movement 6, it is provided with bearing 5 simultaneously, and fix with bearing gland 4, described front baffle 1 includes diversion division and rectification part, the circumferentially distributed flow deflector of described diversion division, between described flow deflector and flow direction, there is angle, angle between blade and the flow direction of described impeller is be more than or equal to 0 °, and less than 30 °.
Described flow deflector and flow direction bevel or become lead angle.Diversion division shape is usual impeller such as, blade be axially formed angle, say, that there is lead angle or oblique angle, simply fixing and do not rotate.
Described flow deflector includes parallel portion 9 and oblique angle portion 10, smoothly transits between parallel portion and oblique angle portion.Described parallel portion 9 is positioned at the import department of front baffle, and described oblique angle portion 10 is located close to the position of impeller 2.Described lead angle is 45 °.Medium passes through diversion division power decomposition tangentially power and axial force, and tangential force will act on wheel rotation, and axial force is born by diversion division, and impeller blade is processed into and axially in parallel or low-angle, and impeller force analysis is shown in Fig. 6 a and Fig. 6 b.Impeller is not by axial force or by minimum axial force, thus being greatly reduced bearing axially loaded.Reaching wheel rotation flexible, accuracy of instrument is high, be greatly improved effusion meter service life, be greatly improved impact resistance.
Described flow deflector is 10, is equidistantly circumferentially distributed in front baffle.
Meanwhile, impeller blade is straight shape or low-angle, can be greatly reduced high accuracy Impeller Machining difficulty, though increasing diversion division part, but manufacture difficulty is little.In sum, structural principle of the present utility model has many advantages than other logical turbine flowmeter tool, and other turbine flowmeter does not have the utilization of similar principles.
Embodiment is not construed as restriction of the present utility model, but any based on spirit improvements introduced of the present utility model, all should within protection domain of the present utility model.
Claims (6)
1. a tangential turbine flowmeter of kind, it includes front baffle and rear baffle, it is provided with impeller in described rear baffle, described impeller is linked by main shaft and sender set, it is characterized in that: described front baffle includes diversion division and rectification part, the circumferentially distributed flow deflector of described diversion division, has angle between described flow deflector and flow direction, angle between blade and the flow direction of described impeller is be more than or equal to 0 °, and less than 30 °.
2. the tangential turbine flowmeter of class according to claim 1, it is characterised in that: described flow deflector and flow direction bevel or become lead angle.
3. the tangential turbine flowmeter of class according to claim 1, it is characterised in that: described flow deflector includes parallel portion and oblique angle portion, smoothly transits between parallel portion and oblique angle portion.
4. the tangential turbine flowmeter of class according to claim 3, it is characterised in that: described parallel portion is positioned at the import department of front baffle, and described mitred sections is in the position near impeller.
5. the tangential turbine flowmeter of class according to claim 1,2,3 or 4, it is characterised in that: described flow deflector is 10, is equidistantly circumferentially distributed in front baffle.
6. the tangential turbine flowmeter of class according to claim 2, it is characterised in that: described lead angle is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125538.XU CN205384057U (en) | 2016-02-18 | 2016-02-18 | Class tangential turbine flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125538.XU CN205384057U (en) | 2016-02-18 | 2016-02-18 | Class tangential turbine flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205384057U true CN205384057U (en) | 2016-07-13 |
Family
ID=56350619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620125538.XU Expired - Fee Related CN205384057U (en) | 2016-02-18 | 2016-02-18 | Class tangential turbine flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205384057U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915646A (en) * | 2018-09-06 | 2018-11-30 | 李龙龙 | Gas transmission line multiphase flow drainage gas production tool |
| CN109798945A (en) * | 2019-02-27 | 2019-05-24 | 南昌航空大学 | Fuel mass flow measurement method |
| CN110567538A (en) * | 2019-09-29 | 2019-12-13 | 福建哈德仪表有限公司 | Turbine flowmeter with parabolic flow guiding device |
-
2016
- 2016-02-18 CN CN201620125538.XU patent/CN205384057U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915646A (en) * | 2018-09-06 | 2018-11-30 | 李龙龙 | Gas transmission line multiphase flow drainage gas production tool |
| CN109798945A (en) * | 2019-02-27 | 2019-05-24 | 南昌航空大学 | Fuel mass flow measurement method |
| CN109798945B (en) * | 2019-02-27 | 2020-05-22 | 南昌航空大学 | Fuel mass flow measuring method |
| CN110567538A (en) * | 2019-09-29 | 2019-12-13 | 福建哈德仪表有限公司 | Turbine flowmeter with parabolic flow guiding device |
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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 |
Granted publication date: 20160713 Termination date: 20190218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |