CN205483089U - Turbine flowmeter's impeller structure and turbine flowmeter thereof - Google Patents

Turbine flowmeter's impeller structure and turbine flowmeter thereof Download PDF

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Publication number
CN205483089U
CN205483089U CN201521033125.0U CN201521033125U CN205483089U CN 205483089 U CN205483089 U CN 205483089U CN 201521033125 U CN201521033125 U CN 201521033125U CN 205483089 U CN205483089 U CN 205483089U
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China
Prior art keywords
impeller
blade
turbine flowmeter
vane
bearing
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CN201521033125.0U
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Chinese (zh)
Inventor
罗志祥
鲁金祥
韩东
王志龙
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Federal Republic Of China (shanghai) Automation Instrument Ltd By Share Ltd
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Federal Republic Of China (shanghai) Automation Instrument Ltd By Share Ltd
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Priority to CN201521033125.0U priority Critical patent/CN205483089U/en
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Abstract

The utility model provides a turbine flowmeter's impeller structure and turbine flowmeter thereof, this turbine flowmeter's impeller structure includes bearing and impeller, and the impeller setting equidistantly on the impeller is provided with a plurality of blades on the bearing, and a plurality of blades are respectively including the front vane and back blade of forming certain angle. The utility model discloses turbine flowmeter's impeller structure, because it is the front vane is unanimous with the direction of rotation of impeller with the protruding orientation of back blade butt joint department, consequently, less to the influence of being surveyed fluidic rerum natura viscosity to can use under higher viscosity condition, extend turbine flowmeter's measuring range. Under the effect of axial medium power, it is less that this impeller structure produces rotatory running torque, and impeller velocity is slower during the same velocity of flow, and the velocity of flow distortion and the impeller of its production arouse that the rotating flow is also less to the upper and lower trip straight tube segment length that needs during the installation is littleer, and rotates that unbalanced centrifugal force is little, frictional resistance hangs down, therefore has improved the life of flowmeter bearing.

Description

The blade wheel structure of a kind of turbine flowmeter and turbine flowmeter thereof
Technical field
This utility model relates to flowmeter technology field, particularly relates to the blade wheel structure of a kind of turbine flowmeter And turbine flowmeter.
Background technology
Turbine flowmeter is speed mode instrument, as shown in Figure 1 and Figure 2, when medium enters effusion meter, Under action of a fluid, owing to turbo blade A and fluid flow to angled, now turbine produces and turns Kinetic moment, starts to rotate after turbine overcomes the moment of resistance and frictional force moment, when all moment reaches balance, Stabilization of speed, turbine rotation angular velocity is linear with flow, takes turns the magnetic on 5 by the signal rotated Body periodic variation sensor magnetic resistance, thus signal detection probe 6 induces to become with fluid volume flow The pulse signal of direct ratio, this signal flows to Flow Meter Based after preamplifier amplification, shaping to be carried out Process, thus directly display volume flow and volume total amount.
Due to turbine flowmeter have the highest degree of accuracy, repeatability the most very well, especially structure very simple, Measurement scope is the widest, the pressure loss is the least, easy to maintenance.Be widely used in oil, chemical industry, Various gases and the measurement of fluid flow in the fields such as metallurgy, pipeline network of fuel gas in city, aviation, scientific research, especially It measures at gas, transmission and distribution pipeline measures and is widely used in gas pressure regulating station metering.
But turbine flowmeter widely used simultaneously as there is the shortcoming of following several respects, and shadow Ring the development of turbine flowmeter:
1) precision of turbine flowmeter is affected relatively big, only by the physical property (density, viscosity) of detected fluid It is applicable to measure basic clean, the liquid of low-viscosity or gas, such as gas flowmeter easily by the shadow of density Ringing, fluid flowmeter is easily affected by viscosity, all can affect the certainty of measurement of effusion meter, to measuring medium Require height;
2) for full-bodied liquid, or the liquid of float, gas are had, movable member during high flow rate (containing impeller) rotating speed is big, easily causes bearing wear or the problem such as blocks, thus limiting turbine flow The range of meter;
3) flow velocity distortion and the impeller of fluid rotates the rotating flow produced, relatively big, therefore on effusion meter impact The upstream and downstream flow development length of effusion meter need to be lengthened during installation, thus limit the installation of effusion meter;
4) small-caliber flow meter of below DN50mm, is affected relatively by discharge characteristic, accuracy of manufacture factor Greatly, the measurement range of small-caliber flow meter is the least, can measurement lower limit flow velocity big (flux lower limit is high);
5) required precision to bearing and tumbler is high, and requires minimum to frictional force during operating, to turning The balance of moving part requires high, thus causes processing and manufacturing cost high, and precision is difficult to ensure that.
Utility model content
The purpose of this utility model is to provide blade wheel structure and the turbine flow thereof of a kind of turbine flowmeter Meter, in order to solve the problem that in prior art, the range of turbine flowmeter is restricted.
First aspect of the present utility model is to provide the blade wheel structure of a kind of turbine flowmeter, including bearing And impeller, impeller is arranged on bearing, and impeller is equidistantly provided with multiple blade, and multiple blades are respectively Front vane and rear blade including composition certain angle.
Further, front vane and the ratio of helical length on the same basic circle cylinder of rear blade are less than 1.
Further, rear blade and the ratio of helical length on the same basic circle cylinder of front vane are less than 1.
Further, the angle between front vane and rear blade is 20 °~120 °.
Further, front vane and rear blade lead angle are 0 °~160 ° or-160 °~0 °.
Further, front vane is formed in one with rear blade.
Further, the angle between front vane and rear blade is arc chord angle.
Further, stating front vane with rear blade is split molding.
Further, the angle between front vane and rear blade is wedge angle.
Another aspect of the present utility model is to provide a kind of turbine flowmeter, including turbine as above The blade wheel structure of effusion meter.
Above-mentioned technical solutions of the utility model are used to provide the benefit that: owing to front vane docks with rear blade The protrusion direction at place is consistent with the direction of rotation of impeller, therefore, and the impact on the physical property viscosity of detected fluid Less, such that it is able to use under the conditions of relatively high viscosity, expand the measurement scope of turbine flowmeter, can To improve the measurement range of the small-caliber flow meter of below DN50mm.Under the effect of axial medium power, It is less that this blade wheel structure produces the rotating torque rotated, and during identical flow velocity, wheel speed is relatively slow, and it produces Flow velocity distortion and impeller cause rotating flow the least, thus the upstream and downstream flow development length needed when installing Less, and the centrifugal force of rotation imbalance is little, frictional resistance is low, thus improve making of effusion meter bearing With the life-span, reduce the required precision of bearing and tumbler.
Accompanying drawing explanation
Fig. 1 is the structural representation of turbine flowmeter in prior art;
Fig. 2 is the structural representation of impeller in Fig. 1;
Fig. 3 is a kind of schematic diagram of the blade wheel structure of this utility model turbine flowmeter;
Fig. 4 is the another kind of schematic diagram of the blade wheel structure of this utility model turbine flowmeter;
Fig. 5 is the structural representation of this utility model turbine flowmeter.
In accompanying drawing, the list of parts representated by each label is as follows:
1, bearing, 2, impeller, 3, front vane, 4, rear blade, 5, signal wheel, 6, signal detection Probe, A, turbo blade.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with Accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, It is fully described by, it is clear that described embodiment is a part of embodiment of this utility model rather than complete The embodiment in portion.
The utility model discloses the blade wheel structure of a kind of turbine flowmeter, as shown in Figure 3, Figure 4, be somebody's turn to do Blade wheel structure includes bearing 1 and impeller 2, and wherein, impeller 2 is arranged on bearing 1, and impeller 2 is first-class Spacing is provided with multiple blade, and multiple blades include front vane 3 and the rear blade forming certain angle respectively 4。
Concrete, front vane 3 can be more slightly shorter than rear blade 4, i.e. front vane 3 and the same base of rear blade 4 On director circle cylinder, the ratio of helical length is less than 1;Or, front vane 3 can be longer than rear blade 4, I.e. rear blade 4 and the ratio of helical length on the same basic circle cylinder of front vane 3 are less than 1.
In this utility model embodiment, front vane 3 and rear blade 4 can be one-body molded can also to be Split molding (directly docking), when it is one-body molded, was connected between front vane 3 with rear blade 4 Cross circular arc, thus its angle is arc chord angle;When it directly docks, then the front vane 3 docked and posterior lobe The angle formed between sheet 4 is wedge angle.Concrete, the angle between front vane 3 and rear blade 4 is permissible Between 20 °~120 °, can be to be angle as shown in Figure 3 form upward, it is also possible to be such as Fig. 4 institute The angle shown form down;It addition, front vane 3 and rear blade 4 lead angle are 0 °~160 ° or-160 °~0 °.
The invention also discloses a kind of turbine flowmeter, as it is shown in figure 5, this turbine flowmeter includes Blade wheel structure as shown in Figure 3 or Figure 4, is provided with signal wheel 5 and signal in the end of its bearing 1 Detection probe 6.
Due to have employed in turbine flowmeter this utility model provide blade wheel structure, due to front vane with The protrusion direction of rear blade joint is consistent with the direction of rotation of impeller, therefore, and the physical property to detected fluid The impact of viscosity is less, such that it is able to use under the conditions of relatively high viscosity, has expanded the survey of turbine flowmeter Weight range, can improve the measurement range of the small-caliber flow meter of below DN50mm.In axial medium power Effect under, this blade wheel structure produce rotate rotating torque less, when identical flow velocity, wheel speed is relatively Slowly, its produce flow velocity distortion and impeller cause rotating flow the least, thus when installing need upper and lower Trip flow development length is less, and the centrifugal force of rotation imbalance is little, frictional resistance is low, thus improves stream In the service life of gauge bearing, reduce the required precision of bearing and tumbler.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, and Non-to its restriction;Although this utility model being described in detail with reference to foregoing embodiments, ability The those of ordinary skill in territory is it is understood that it still can be to the technical scheme described in foregoing embodiments Modify, or the most some or all of technical characteristic is carried out equivalent;And these amendment or Person replaces, and does not make the essence of appropriate technical solution depart from the model of this utility model each embodiment technical scheme Enclose.

Claims (10)

1. the blade wheel structure of a turbine flowmeter, it is characterised in that include that bearing and impeller, described impeller are arranged on described bearing, described impeller is equidistantly provided with multiple blade, the plurality of blade includes front vane and the rear blade forming certain angle respectively.
The blade wheel structure of a kind of turbine flowmeter the most according to claim 1, it is characterised in that described front vane and the ratio of helical length on the same basic circle cylinder of rear blade are less than 1.
The blade wheel structure of a kind of turbine flowmeter the most according to claim 1, it is characterised in that described rear blade and the ratio of helical length on the same basic circle cylinder of front vane are less than 1.
4. according to the blade wheel structure of a kind of turbine flowmeter described in Claims 2 or 3, it is characterised in that the angle between described front vane and rear blade is 20 °~120 °.
5. according to the blade wheel structure of a kind of turbine flowmeter described in Claims 2 or 3, it is characterised in that described front vane and rear blade lead angle are 0 °~160 ° or-160 °~0 °.
6. according to the blade wheel structure of a kind of turbine flowmeter described in any one of claims 1 to 3, it is characterised in that described front vane is formed in one with rear blade.
The blade wheel structure of a kind of turbine flowmeter the most according to claim 6, it is characterised in that the angle between described front vane and rear blade is arc chord angle.
8. according to the blade wheel structure of a kind of turbine flowmeter described in any one of claims 1 to 3, it is characterised in that described front vane and rear blade are split molding.
The blade wheel structure of a kind of turbine flowmeter the most according to claim 8, it is characterised in that the angle between described front vane and rear blade is wedge angle.
10. a turbine flowmeter, it is characterised in that include the blade wheel structure of turbine flowmeter as described in any one of claim 1~9.
CN201521033125.0U 2015-12-11 2015-12-11 Turbine flowmeter's impeller structure and turbine flowmeter thereof Active CN205483089U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521033125.0U CN205483089U (en) 2015-12-11 2015-12-11 Turbine flowmeter's impeller structure and turbine flowmeter thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521033125.0U CN205483089U (en) 2015-12-11 2015-12-11 Turbine flowmeter's impeller structure and turbine flowmeter thereof

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CN205483089U true CN205483089U (en) 2016-08-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105387893A (en) * 2015-12-11 2016-03-09 罗美特(上海)自动化仪表股份有限公司 Impeller structure of turbine flow meter and turbine flow meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105387893A (en) * 2015-12-11 2016-03-09 罗美特(上海)自动化仪表股份有限公司 Impeller structure of turbine flow meter and turbine flow meter
CN105387893B (en) * 2015-12-11 2020-02-11 罗美特(上海)自动化仪表股份有限公司 Impeller structure of turbine flowmeter and turbine flowmeter thereof

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