CN203148474U

CN203148474U - Integrated double-helix turbine

Info

Publication number: CN203148474U
Application number: CN 201320158526
Authority: CN
Inventors: 吴波
Original assignee: Chongqing Endurance Industry Stock Co Ltd
Current assignee: Chongqing Endurance Industry Stock Co Ltd
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-08-21
Anticipated expiration: 2023-04-02

Abstract

The utility model discloses an integrated double-helix turbine which comprises a spindle (1) and blades (2) arranged on the periphery of the spindle (1), wherein the number of the blades is an even number. Each blade (2) is composed of a front section lead and a rear section lead with different helix angles, the lead of the front section of a pressure side (A) of each blade and the lead of the front section of a suction side (B) of each blade are both T1, the lead of the rear section of the pressure side (A) of each blade is T2, the lead of the rear section of the suction side (B) of each blade is T3, the T1 is larger than or equal to the T2, and the T2 is larger than or equal to the T3. Front lead blades provide stable measuring signals, and rear lead blades adjust according to media with different viscosity. The applicable fluid viscosity range of the double-helix-angle blade turbine is wider than that of a common turbine flowmeter. Meanwhile, due to the fact that the rear lead of the suction side and the rear lead of the pressure side are smaller than the front leads, the lift force of fluid to the blades is improved, the blades are very sensitive to variation of fluid flow, synchronous corresponding and wide range ratio can be completely achieved, and the demand for trade connect in precision can be met.

Description

Integrated double helix turbine

Technical field

The utility model detects and measures the turbo flow meter of fluid, the particularly a kind of turbine structure in the turbo flow meter.

Background technology

Turbo flow meter by turbine, shell, be arranged on inside measurement chamber between turbine and the shell etc. and form.The turbine setting, promotes blade rotation and counts during by inner measurement chamber at fluid in the enclosure.Existing turbine flow is in respect of a lot of shortcomings: generally only be applicable to low viscous liquid measure, when high viscosity fluid was measured, output signal value changed with change in flow disproportionate; Range ratio is narrow, can only be used for process control, and precision does not reach the requirement of trade transaction; When secondary speed is very high, exceed the highest detection frequency of pick-up unit easily, thereby cause dropout, make that counting is inaccurate.

The utility model content

The utility model aims to provide a kind of low-viscosity (mobile) liquid that can be used for and measures, and can be used for the turbine structure that high viscosity liquid is measured again, and range ratio is wide, the precision height.

For this reason, the technical scheme that the utility model adopts is: a kind of integrated double helix turbine, comprise rotating shaft and be arranged on the even number blade of rotating shaft periphery, key is: each described blade is made of the different forward and backward two sections helical pitches of helix angle, the helical pitch of blade pressure side leading portion and the helical pitch of suction side leading portion are T1, the helical pitch of blade pressure rear flank section is T2, and the helical pitch of suction side back segment is T3, and T1 〉=T2 〉=T3.

Be preferably, be embedded with some magnet steel at the outer circumference face of described blade leading portion helical pitch, all magnet steel homopolarities towards, and equidistantly arrange along the bearing of trend of helix.Set up a plurality of magnet steel, make magnetic field form Overlay in inspection positions, avoided because the dropout that secondary speed highest detection frequency too high, that exceeded pick-up unit causes is better to the fluid metering accuracy of high flow rate.

Further, the outer end of described blade is radially wide, and the inner end is that the arc transition of R links to each other with rotating shaft by radius, and the width of inner end diminishes gradually, and the xsect of described blade leading portion is about vertical middle section left-right symmetric.Leaf quality is concentrated at the place, centre position of xsect, and the sensitivity that can improve blade simultaneously, adopts integral body to add man-hour, prevents that blade and cutter from interfering; The xsect of blade back segment is according to being arranged to unsymmetric structures according to the fluid viscosity difference.

Beneficial effect: two sections helical pitches before and after turbo blade is divided into, preceding helical pitch blade provides the stably measured signal, and back helical pitch blade is regulated according to the different viscosities medium.The fluid viscosity scope that this double helix angle blade turbine is suitable for is much wider than the typical turbine flowmeter; Simultaneously, because suction side, back helical pitch on the pressure side less than preceding helical pitch, have improved the lift of fluid to blade, the variation of blade fluid flow is very sensitive, can reach fully locking phase should, range ratio is wide, can precision satisfy the trade transaction requirement; Further, adopt many magnet steel arrangement mode, dropout when having avoided detection, better to the fluid metering accuracy of high flow rate.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 for adopt quantimeter of the present utility model for detection of the time signal waveforms.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Integrated double helix turbine as shown in Figure 1 is made up of rotating shaft 1, blade 2 and magnet steel 3.

Blade 2 is even number (selecting 2,4,6 or 8 usually for use), be arranged on the periphery of rotating shaft 1, blade 2 and rotating shaft 1 are one-body molded, each blade 2 is made of the different forward and backward two sections helical pitches of helix angle, near fluid intake (shown in arrow among Fig. 1) be the helical pitch leading portion, away from fluid intake is the helical pitch back segment.Blade 2 is divided on the pressure side A and suction side B, and therefore, blade pressure side A and suction side B all have two helical pitches, and on the pressure side the axial distance of A leading portion is L1, and corresponding helical pitch is T1, and the axial distance of suction side B leading portion also is L1, and corresponding helical pitch also is T1; On the pressure side the axial distance of back segment is L2, and corresponding helical pitch is T2, and the axial distance of suction side back segment is L3, and corresponding helical pitch is T3; T2 arranges according to fluid viscosity is different with T3, and it is worth big or small T1 〉=T2 〉=T3, and the fluid in its design discharge scope all flows with layer flow mode in turbine surfaces.

Preferably, be embedded with some magnet steel 3 at the outer circumference face of blade 2 leading portion helical pitches, all magnet steel 3 homopolarities towards, and equidistantly arrange along the bearing of trend of helix.Need to prove, reach signal waveform as shown in Figure 3, must calculate the accurately spread length between each magnet steel 3, influence counting accuracy variation appears and in the waveform after preventing from superposeing, and among Fig. 3, a is the counting starting point, and b is the counting terminal point.

Further, as shown in Figure 2, blade 2 is divided into outer end and inner end, and an end that links to each other with rotating shaft 1 is the inner end, and the other end is the outer end.The outer end of blade 2 is radially wide, the inner end is that the arc transition of R links to each other with rotating shaft 1 and the width of inner end diminishes gradually by radius, the xsect of blade 2 leading portions is about vertical middle section C left-right symmetric, and the xsect of blade 2 back segments is according to the different unsymmetric structures of being arranged to of fluid viscosity.

The above only is preferred embodiment of the present utility model, not with this as restriction of the present utility model.Those of ordinary skill in the art under the prerequisite of the utility model aim and claim, can make multiple similar expression under enlightenment of the present utility model, such conversion all falls within the protection domain of the present utility model.

Claims

1. integrated double helix turbine, comprise rotating shaft (1) and be arranged on the even number blade (2) of rotating shaft (1) periphery, it is characterized in that: each described blade (2) is made of the different forward and backward two sections helical pitches of helix angle, the helical pitch of the helical pitch of blade pressure side (A) leading portion and suction side (B) leading portion is T1, the helical pitch of blade pressure side (A) back segment is T2, the helical pitch of suction side (B) back segment is T3, and T1 〉=T2 〉=T3.

2. according to the described integrated double helix turbine of claim 1, it is characterized in that: the excircle in described blade (2) leading portion helical pitch is embedded with some magnet steel (3), all magnet steel (3) homopolarity towards, and equidistantly arrange along the bearing of trend of helix.

3. according to claim 1 or 2 described integrated double helix turbines, it is characterized in that: the outer end of described blade (2) is radially wide, the inner end is that the arc transition of R links to each other with rotating shaft (1) by radius, and the width of inner end diminishes gradually, and the xsect of described blade (2) leading portion is about vertical middle section (C) left-right symmetric.