CN204924334U - Fluid mass flow meter based on torsional vibration - Google Patents
Fluid mass flow meter based on torsional vibration Download PDFInfo
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- CN204924334U CN204924334U CN201520718528.2U CN201520718528U CN204924334U CN 204924334 U CN204924334 U CN 204924334U CN 201520718528 U CN201520718528 U CN 201520718528U CN 204924334 U CN204924334 U CN 204924334U
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- torsional oscillation
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Abstract
The utility model provides a fluid mass flow meter based on torsional vibration, it includes casing, measuring tube, first bellows, second bellows, fluid inlet flange, fluid issuing flange, torsional vibration roof beam, fastener, first vibration exciter, second vibration exciter and vibration pickup, a through -hole has been opened about respectively to the casing on the wall, the one end of first bellows and second bellows is connected through flange and the through -hole on the left and right sides wall respectively, and the other end passes through the flange to be connected with the both ends of measuring tube respectively, and fastener sets up on the casing upper wall, and the casing setting is passed in fastener in torsional vibration roof beam upper end, and the lower extreme is fixed on the measuring tube, two vibration exciter settings set up on the diapire and about the axis of torsional vibration roof beam is symmetrical in the casing, the vibration pickup sets up in the casing on the diapire. The utility model discloses not only can eliminate the influence that extraneous vibration convection cell mass flow detected the precision by furthest to can show and reduce fluid temperature (F. T. ) and the influence of variation in pressure to its detection precision.
Description
Technical field
The utility model belongs to liquid mass flow detection technique field, is specifically related to a kind of liquid mass flow meter based on torsional oscillation.
Background technology
At present, in most of industry, mass rate in order to realize convection cell carries out the instrument mainly coriolis mass flowmeters detected, its main involving vibrations pipe, vibrator, vibro-pickup, shell and controller 5 modules, this kind of mass flowmeter has outstanding advantage: accuracy of detection is high, stability is strong, detection efficiency is high, its Cleaning Principle is when fluid flows through coriolis mass flowmeters, be full of vibrating tube forced vibration under the effect of vibrator of fluid, fluid in vibrating tube is subject to the effect of Coriolis force, and effect is to vibrating tube power, make to there is phase differential with the vibration of crossing any two symmetric position places that the xsect of middle of vibrating tube is the plane of symmetry in vibrating tube, the phase differential at their position places of two vibro-pickups pickup of installing along vibrating tube symmetry, because flow through the funtcional relationship having between the mass rate of the fluid of vibrating tube and the phase differential of pickup and determine, so the mass rate of fluid can be tried to achieve by the phase differential picked up.
What market adopted between the two ends of vibrating tube and shell in most of coriolis mass flowmeters is be rigidly connected, when the extraneous vibration that coriolis mass flowmeters is subject to is too violent, the vibration of its internal vibration pipe just can be subject to the impact of extraneous vibration, thus makes the mass rate of the fluid detected inaccurate, in addition, because the core component of the mass rate of traditional coriolis mass flowmeters test fluid is vibrating tube, when using the mass rate of traditional coriolis mass flowmeters test fluid, the shape of the vibrating tube of its inside, structure and performance parameters etc. all should immobilize, but, when the temperature of detected fluid and pressure change, the rigidity of vibrating tube all can be made to change, and then the vibration characteristics of vibrating tube is changed, thus make the detected value of coriolis mass flowmeters occur marked change, accuracy of detection is caused to reduce.
Utility model content
In order to overcome the deficiency of above technology, technical problem to be solved in the utility model there are provided a kind of liquid mass flow meter based on torsional oscillation, and it significantly can reduce the impact of the factor convection cell mass rate accuracy of detection such as extraneous vibration, fluid temperature (F.T.) to be measured and pressure change.
The technical scheme in the invention for solving the technical problem is: a kind of liquid mass flow meter based on torsional oscillation, it is characterized in that, comprise housing, measuring tube, the first corrugated tube, the second corrugated tube, fluid intake flange, fluid egress point flange, torsional oscillation beam, fastener, the first vibrator, the second vibrator and vibro-pickup; Described housing is the rectangular parallelepiped housing of sealing, the left wall of housing has the first through hole, the center of circle of described first through hole is on the vertical center line being positioned at the left wall of housing of the left wall of housing, the right wall of housing has the second through hole, the center of circle of described second through hole is positioned on the vertical center line of the right wall of housing, and the vertical center line of the left wall of housing and the vertical center line of the right wall of housing are arranged in same vertical plane; One end of described first corrugated tube is connected with the first through hole by flange, the other end of the first corrugated tube is connected with one end of measuring tube by flange, one end of described second corrugated tube is connected with the second through hole by flange, and the other end of the second corrugated tube is connected with the other end of measuring tube by flange; Described fluid intake flange is arranged on the first through hole on the left wall of housing, fluid intake flange and housing are integrated and coaxial with the first through hole, described fluid egress point flange is arranged on the second through hole on the right wall of housing, and fluid egress point flange and housing are integrated and coaxial with the second through hole; Described fastener is arranged on the upper wall of housing; Described torsional oscillation beam upper end is arranged in fastener through housing, and lower end is fixed on measuring tube, and the axis of torsional oscillation beam through fastener geometric center and perpendicular to the axis of measuring tube; The first described vibrator and the second vibrator are arranged in housing on diapire, and the first vibrator and the second vibrator are arranged about the axisymmetrical of torsional oscillation beam; Described vibro-pickup is arranged in housing on diapire, in the intermediate cross-section plane that the geometric center of vibro-pickup is positioned at measuring tube and vibro-pickup do not contact with measuring tube.
Preferably, described fastener comprises front fastener, rear fastener and fourth hole, described front fastener and rear fastener are bolted, the axis of described fourth hole through described fastener geometric center and perpendicular to the axis of described measuring tube, the upper end of described torsional oscillation beam to be arranged in fourth hole and with fourth hole interference fit; Described front fastener and rear fastener are respectively by being bolted on the upper wall of housing.
Preferably, described torsional oscillation beam is made up of upper cylinder and lower cylinder, and described upper cylinder is arranged in fastener, and the upper end of described lower cylinder is fixedly connected with the lower end of upper cylinder, and the lower end of lower cylinder has third through-hole; Described measuring tube through third through-hole and with third through-hole interference fit.
Preferably, upper cylinder and the lower cylinder of described torsional oscillation beam are integrated, and the diameter of upper cylinder is greater than the diameter of lower cylinder.
Preferably, the cylinder of described torsional oscillation beam to be xsect be rectangle, the lower end of torsional oscillation beam is connected with measuring tube by clamp device, and described clamp device is bolted on torsional oscillation beam.
Preferably, described clamp device comprises the first clamp device and the second clamp device, first clamp device and the second clamp device are bolted on torsional oscillation beam, offer fifth hole in clamp device, described measuring tube through fifth hole and with fifth hole interference fit.
Preferably, the rigidity of described housing and fastener is much larger than the rigidity of described torsional oscillation beam.
Preferably, the quantity of described torsional oscillation beam can be many, the torsional oscillation beam of more than two and two quantity along the axial direction of measuring tube and intermediate cross-section plane symmetry distribution about measuring tube arrange.
The beneficial effects of the utility model are: the two ends of measuring tube of the present utility model are connected with housing respectively by a corrugated tube, effectively can reduce the impact of extraneous vibration on this liquid mass flow meter accuracy of detection; By the upper end of torsional oscillation beam is fixed on fastener on shell top wall is set through hole in, avoid extraneous vibration that liquid mass flow meter is subject to too violent time cause inner torsional oscillation vibration of beam just can be subject to extraneous vibration the phenomenon that affects occur, thus make the density of the fluid detected more accurate; Because the housing of liquid mass flow meter and the rigidity of fastener are much larger than the rigidity of torsional oscillation beam, avoid torsional oscillation beam and housing and fastener and produce resonance effect thus the phenomenon rigidity of torsional oscillation beam being changed finally cause the accuracy of detection of liquid mass flow meter to reduce occurs.
The utility model is by arranging at liquid mass flow meter the mass rate that torsional oscillation beam measures fluid, the impact of extraneous vibration convection cell mass rate accuracy of detection can not only be eliminated to greatest extent, and accuracy of detection is high, simultaneously, when using the mass rate of this torsional oscillation formula liquid mass flow meter test fluid, the impact of change on its accuracy of detection of fluid temperature (F.T.) and pressure significantly can be reduced.
Accompanying drawing explanation
Fig. 1 is the arrangement structural representation of the utility model embodiment 1;
Fig. 2 is the plan structure schematic diagram of the utility model embodiment 1;
Fig. 3 is the main pseudosection of the utility model embodiment 1;
Fig. 4 is the top plan view of the utility model embodiment 1;
Fig. 5 is the left pseudosection of the utility model embodiment 1;
Fig. 6 is the enlarged diagram 5 times of enlarged drawings of B place (namely in Fig. 3) of the first corrugated tube in Fig. 3;
Fig. 7 is the enlarged diagram (5 times of enlarged drawings) of fastener described in the utility model;
Fig. 8 is the structural representation of torsional oscillation beam described in the utility model;
The connection diagram of Fig. 9 is the utility model xsect when being rectangle torsional oscillation beam and clamp device and measuring tube;
Figure 10 is the structural representation of clamp device described in the utility model;
Figure 11 is the arrangement structural representation of the utility model embodiment 2;
Figure 12 is the main pseudosection of the utility model embodiment 2;
Figure 13 is the top plan view of the utility model embodiment 2;
In figure: fastener, 803 fourth holes, 9 first vibrators, 10 second vibrators, 11 vibro-pickups, 12 first through holes, 13 second through holes, 14 clamp devices, 1,401 first clamp devices, 1,402 second clamp devices, 1403 fifth holes after fastener, 802 before cylinder on 1 housing, 2 measuring tubes, 3 first corrugated tubes, 4 second corrugated tubes, 5 fluid intake flanges, 6 fluid egress point flanges, 7 torsional oscillation beams, 701,702 times cylinders, 703 third through-holes, 8 fasteners, 801.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.In addition, the utility model can in different example repeat reference numerals and/or letter.This repetition is to simplify and clearly object, itself does not indicate the relation between discussed various embodiment and/or setting.It should be noted that parts illustrated in the accompanying drawings are not necessarily drawn in proportion.The utility model eliminates the description of known assemblies and treatment technology and process to avoid unnecessarily limiting the utility model.
Embodiment 1
As shown in Figures 1 to 10, a kind of liquid mass flow meter based on torsional oscillation of the present utility model, it comprises housing 1, measuring tube 2, first corrugated tube 3, second corrugated tube 4, fluid intake flange 5, fluid egress point flange 6, torsional oscillation beam 7, fastener 8, first vibrator 9, second vibrator 10 and vibro-pickup 11; Described housing 1 is the rectangular parallelepiped housing of sealing, the left wall of housing has the first through hole 12, the center of circle of described first through hole 12 is positioned on the vertical center line of the left wall of housing, the right wall of housing has the second through hole 13, the center of circle of described second through hole 13 is positioned on the vertical center line of the right wall of housing, and the vertical center line of the left wall of housing and the vertical center line of the right wall of housing are arranged in same vertical plane; One end of described first corrugated tube 3 is connected with the first through hole 12 by flange, the other end of the first corrugated tube 3 is connected by flange one end with measuring tube 2, one end of described second corrugated tube 4 is connected with the second through hole 13 by flange, the other end of the second corrugated tube 4 is connected by the other end of flange with measuring tube 2, the two ends of measuring tube 2 are connected with housing respectively by a corrugated tube, effectively can reduce the impact of extraneous vibration on this liquid mass flow meter accuracy of detection; Described fluid intake flange 5 is arranged on the first through hole on the left wall of housing, fluid intake flange 5 and housing are integrated and coaxial with the first through hole 12, described fluid egress point flange 6 is arranged on the second through hole on the right wall of housing, and fluid egress point flange 6 and housing are integrated and coaxial with the second through hole 13; Described fastener 8 is arranged on the upper wall of housing 1; Described torsional oscillation beam 7 upper end is arranged in fastener 8 through housing, and lower end is fixed on measuring tube 2, and the axis of torsional oscillation beam through fastener geometric center and perpendicular to the axis of measuring tube; The first described vibrator 9 and the second vibrator 10 are arranged in housing 1 on diapire, and the first vibrator 9 and the second vibrator 10 are arranged about the axisymmetrical of torsional oscillation beam; Described vibro-pickup 11 is arranged in housing 1 on diapire, in the intermediate cross-section plane that the geometric center of vibro-pickup is positioned at measuring tube and vibro-pickup do not contact with measuring tube.
Preferably, as shown in Figure 7, fastener 8 described in the utility model comprises front fastener 801, rear fastener 802 and fourth hole 803, described front fastener 801 and rear fastener 802 are bolted, the axis of described fourth hole 803 through described fastener geometric center and perpendicular to the axis of described measuring tube 2, the upper end of described torsional oscillation beam 7 to be arranged in fourth hole 803 and with fourth hole interference fit; Described front fastener 801 and rear fastener 802 are respectively by being bolted on the upper wall of housing.The utility model by the upper end of torsional oscillation beam is fixed on fastener on shell top wall is set through hole in, avoid extraneous vibration that liquid mass flow meter is subject to too violent time cause inner torsional oscillation vibration of beam just can be subject to extraneous vibration the phenomenon that affects occur, thus make the density of the fluid detected more accurate.
Preferably, as shown in Figure 8, torsional oscillation beam 7 described in the utility model is made up of upper cylinder 701 and lower cylinder 702, and described upper cylinder 701 is arranged in fastener 8, the upper end of described lower cylinder 702 is fixedly connected with the lower end of upper cylinder, and the lower end of lower cylinder has third through-hole 703; Described measuring tube 2 through third through-hole 703 and with third through-hole interference fit.Wherein, upper cylinder 701 and the lower cylinder 702 of described torsional oscillation beam are integrated, and the diameter of upper cylinder is greater than the diameter of lower cylinder.
Preferably, as shown in Figure 9, torsional oscillation beam 7 described in the utility model for xsect be the cylinder of rectangle, the lower end of torsional oscillation beam 7 is connected with measuring tube 2 by clamp device 14, and described clamp device 14 is bolted on torsional oscillation beam 7.
Preferably, as shown in Figure 10, described clamp device 14 comprises the first clamp device 1401 and the second clamp device 1402, first clamp device 1401 and the second clamp device 1402 are bolted on torsional oscillation beam, offer fifth hole 1403 in clamp device, described measuring tube 2 through fifth hole 1403 and with fifth hole interference fit.
Preferably, the rigidity of housing 1 described in the utility model and fastener 8 is much larger than the rigidity of described torsional oscillation beam 7, because the housing of liquid mass flow meter and the rigidity of fastener are much larger than the rigidity of torsional oscillation beam, avoid torsional oscillation beam and housing and fastener and produce resonance effect thus the phenomenon rigidity of torsional oscillation beam being changed finally cause the accuracy of detection of liquid mass flow meter to reduce occurs.
When the quantity of the torsional oscillation beam of a kind of liquid mass flow meter based on torsional oscillation described above is one, the process that liquid mass flow meter convection cell mass rate described in the utility model carries out detecting is as follows:
With the intersection point of the axis of the axis of described measuring tube and torsional oscillation beam for initial point, with the axis of measuring tube for y-axis, with the axis of torsional oscillation beam for z-axis, set up rectangular coordinate system in space with the straight line perpendicular to the axis of measuring tube and the axis of torsional oscillation beam for x-axis;
When fluid flows through described measuring tube, the first vibrator and the second vibrator exciting measuring tube, make the system of described torsional oscillation beam and measuring tube and interior fluid composition thereof around z-axis torsional oscillation;
If exciting force F (t)=F that the first vibrator and the second vibrator provide
0sin (ω t), excited frequency is ω, and the natural frequency of the torsion of the system of torsional oscillation beam and measuring tube composition is ω
0, the natural frequency of the x-axis direction vibration of the system of torsional oscillation beam and measuring tube composition is ω
x0, the torsional oscillation angle of torsional oscillation beam is θ (t), and the torsional oscillation damping ratio of torsional oscillation beam is ξ, and the torsional rigidity of torsional oscillation beam is k, and the rigidity in the x direction of torsional oscillation beam is k
x, the damping ratio in the x direction of torsional oscillation beam is ξ
xfirst vibrator and the second vibrator are l to the distance of the intermediate cross-section of measuring tube, the length of measuring tube is L, the torsional oscillation amplitude of the system be made up of torsional oscillation beam and measuring tube and inner fluid thereof is A, the displacement that the system be made up of torsional oscillation beam and measuring tube and inner fluid thereof is caused by Coriolis force is X, the flow velocity of fluid is v, and the Coriolis force that is subject to of fluid is Q
c, the mass rate flowing through the fluid of measuring tube in the unit interval is Q, then the moment of torsion that the system be made up of torsional oscillation beam and measuring tube and inner fluid thereof is subject to is M (t)=F (t) l=lF
0sin (ω t);
From the definition of mechanical vibration theory and Coriolis force, the mass rate flowing through the fluid of measuring tube in the unit interval is:
Q＝λX
λ is by above-mentioned ω, ω
0, ω
x0, ξ, ξ
x, k, k
x, l, L and F
0the scale-up factor that parameter determines:
Wherein, α is the constant relevant with the system vibration be made up of torsional oscillation beam and measuring tube and inner fluid thereof;
By the system maximum displacement along the x-axis direction that vibro-pickup pickup is made up of torsional oscillation beam and measuring tube and inner fluid thereof, thus obtain the mass rate of the fluid flowing through measuring tube in the unit interval.
Embodiment 2
Torsional oscillation beam 7 described in the utility model can adopt many, when employing more than two and two quantity torsional oscillation beam along measuring tube axial direction and about measuring tube intermediate cross-section plane symmetry distribution arrange.As shown in Figure 11 to Figure 13, two are adopted to be described for torsional oscillation beam 7 in example 2.
As different from Example 1: change the quantity of the torsional oscillation beam 4 in embodiment 1 into two by one, to fastener 8 also become two from one; Two torsional oscillation beams 7 along the axial direction of measuring tube 2 and intermediate cross-section plane symmetry distribution about measuring tube arrange, two fastener 8 corresponding tops being arranged on torsional oscillation beam 7 respectively.
When the quantity of the torsional oscillation beam of a kind of liquid mass flow meter based on torsional oscillation described in the utility model is two, it is as follows that liquid mass flow meter convection cell mass rate described in the utility model carries out testing process:
First the torsional oscillation beam of more than two or two is equivalent to a torsional oscillation beam, then carrys out convection cell mass rate with the detection method of a torsional oscillation beam and detect;
With the intersection point of the axis of the axis of described measuring tube and equivalent torsional oscillation beam for initial point, with the axis of measuring tube for y-axis, with the axis of equivalent torsional oscillation beam for z-axis, set up rectangular coordinate system in space with the straight line perpendicular to the axis of measuring tube and the axis of equivalent torsional oscillation beam for x-axis;
When fluid flows through described measuring tube, the first vibrator and the second vibrator exciting measuring tube, make the system of described equivalent torsional oscillation beam and measuring tube and interior fluid composition thereof around z-axis torsional oscillation;
If exciting force F (t)=F that the first vibrator and the second vibrator provide
0sin (ω t), excited frequency is ω, and the natural frequency of the torsion of the system of equivalent torsional oscillation beam and measuring tube composition is ω
0, the natural frequency of the x-axis direction vibration of the system of equivalent torsional oscillation beam and measuring tube composition is ω
x0, the torsional oscillation angle of equivalent torsional oscillation beam is θ (t), and the torsional oscillation damping ratio of equivalent torsional oscillation beam is ξ, and the torsional rigidity of equivalent torsional oscillation beam is k, and the rigidity in the x direction of equivalent torsional oscillation beam is k
x, the damping ratio in the x direction of equivalent torsional oscillation beam is ξ
xfirst vibrator and the second vibrator are l to the distance of the intermediate cross-section of measuring tube, the length of measuring tube is L, the torsional oscillation amplitude of the system be made up of equivalent torsional oscillation beam and measuring tube and inner fluid thereof is A, the displacement that the system be made up of equivalent torsional oscillation beam and measuring tube and inner fluid thereof is caused by Coriolis force is X, the flow velocity of fluid is v, and the Coriolis force that is subject to of fluid is Q
c, the mass rate flowing through the fluid of measuring tube in the unit interval is Q, then the moment of torsion that the system be made up of equivalent torsional oscillation beam and measuring tube and inner fluid thereof is subject to is M (t)=F (t) l=lF
0sin (ω t);
From the definition of mechanical vibration theory and Coriolis force, the mass rate flowing through the fluid of measuring tube in the unit interval is:
Q＝λX
λ is by above-mentioned ω, ω
0, ω
x0, ξ, ξ
x, k, k
x, l, L and F
0the scale-up factor that parameter determines:
Wherein, α is the constant relevant with the system vibration be made up of equivalent torsional oscillation beam and measuring tube and inner fluid thereof;
By the system maximum displacement along the x-axis direction that vibro-pickup pickup is made up of equivalent torsional oscillation beam and measuring tube and inner fluid thereof, thus obtain the mass rate of the fluid flowing through measuring tube in the unit interval.
Scheme after above-mentioned change also obviously has factors such as effectively eliminating extraneous vibration, fluid temperature (F.T.) and pressure change to the advantage of the impact of described torsional oscillation formula liquid mass flow meter accuracy of detection.
In addition, range of application of the present utility model is not limited to the technique of the specific embodiment described in instructions, mechanism, manufacture, material composition, means, method and step.From disclosure of the present utility model, to easily understand as those of ordinary skill in the art, for the technique existed at present or be about to develop, mechanism, manufacture, material composition, means, method or step later, wherein their perform the identical function of the corresponding embodiment cardinal principle that describes with the utility model or obtain the identical result of cardinal principle, can apply according to the utility model to them.Therefore, the utility model claims are intended to these technique, mechanism, manufacture, material composition, means, method or step to be included in its protection domain.
Claims (8)
1. the liquid mass flow meter based on torsional oscillation, it is characterized in that, comprise housing, measuring tube, the first corrugated tube, the second corrugated tube, fluid intake flange, fluid egress point flange, torsional oscillation beam, fastener, the first vibrator, the second vibrator and vibro-pickup; Described housing is the rectangular parallelepiped housing of sealing, the left wall of housing has the first through hole, the center of circle of described first through hole is positioned on the vertical center line of the left wall of housing, the right wall of housing has the second through hole, the center of circle of described second through hole is positioned on the vertical center line of the right wall of housing, and the vertical center line of the left wall of housing and the vertical center line of the right wall of housing are arranged in same vertical plane; One end of described first corrugated tube is connected with the first through hole by flange, the other end of the first corrugated tube is connected with one end of measuring tube by flange, one end of described second corrugated tube is connected with the second through hole by flange, and the other end of the second corrugated tube is connected with the other end of measuring tube by flange; Described fluid intake flange is arranged on the first through hole on the left wall of housing, fluid intake flange and housing are integrated and coaxial with the first through hole, described fluid egress point flange is arranged on the second through hole on the right wall of housing, and fluid egress point flange and housing are integrated and coaxial with the second through hole; Described fastener is arranged on the upper wall of housing; Described torsional oscillation beam upper end is arranged in fastener through housing, and lower end is fixed on measuring tube, and the axis of torsional oscillation beam through fastener geometric center and perpendicular to the axis of measuring tube; The first described vibrator and the second vibrator are arranged in housing on diapire, and the first vibrator and the second vibrator are arranged about the axisymmetrical of torsional oscillation beam; Described vibro-pickup is arranged in housing on diapire, in the intermediate cross-section plane that the geometric center of vibro-pickup is positioned at measuring tube and vibro-pickup do not contact with measuring tube.
2. a kind of liquid mass flow meter based on torsional oscillation according to claim 1, it is characterized in that, described fastener comprises front fastener, rear fastener and fourth hole, described front fastener and rear fastener are bolted, the axis of described fourth hole through described fastener geometric center and perpendicular to the axis of described measuring tube, the upper end of described torsional oscillation beam to be arranged in fourth hole and with fourth hole interference fit; Described front fastener and rear fastener are respectively by being bolted on the upper wall of housing.
3. a kind of liquid mass flow meter based on torsional oscillation according to claim 1, it is characterized in that, described torsional oscillation beam is made up of upper cylinder and lower cylinder, described upper cylinder is arranged in fastener, the upper end of described lower cylinder is fixedly connected with the lower end of upper cylinder, and the lower end of lower cylinder has third through-hole; Described measuring tube through third through-hole and with third through-hole interference fit.
4. a kind of liquid mass flow meter based on torsional oscillation according to claim 3, is characterized in that, upper cylinder and the lower cylinder of described torsional oscillation beam are integrated, and the diameter of upper cylinder is greater than the diameter of lower cylinder.
5. a kind of liquid mass flow meter based on torsional oscillation according to claim 1, it is characterized in that, the cylinder of described torsional oscillation beam to be xsect be rectangle, the lower end of torsional oscillation beam is connected with measuring tube by clamp device, and described clamp device is bolted on torsional oscillation beam.
6. a kind of liquid mass flow meter based on torsional oscillation according to claim 5, it is characterized in that, described clamp device comprises the first clamp device and the second clamp device, first clamp device and the second clamp device are bolted on torsional oscillation beam, offer fifth hole in clamp device, described measuring tube through fifth hole and with fifth hole interference fit.
7. a kind of liquid mass flow meter based on torsional oscillation according to claim 1, is characterized in that, the rigidity of described housing and fastener is much larger than the rigidity of described torsional oscillation beam.
8. a kind of liquid mass flow meter based on torsional oscillation according to any one of claim 1 to 7, it is characterized in that, the quantity of described torsional oscillation beam can be many, the torsional oscillation beam of more than two and two quantity along the axial direction of measuring tube and intermediate cross-section plane symmetry distribution about measuring tube arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520718528.2U CN204924334U (en) | 2015-09-16 | 2015-09-16 | Fluid mass flow meter based on torsional vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520718528.2U CN204924334U (en) | 2015-09-16 | 2015-09-16 | Fluid mass flow meter based on torsional vibration |
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| Publication Number | Publication Date |
|---|---|
| CN204924334U true CN204924334U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520718528.2U Withdrawn - After Issue CN204924334U (en) | 2015-09-16 | 2015-09-16 | Fluid mass flow meter based on torsional vibration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067060A (en) * | 2015-09-16 | 2015-11-18 | 济南大学 | Fluid mass flow meter based on torsional vibration and detection method of fluid mass flow meter |
-
2015
- 2015-09-16 CN CN201520718528.2U patent/CN204924334U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067060A (en) * | 2015-09-16 | 2015-11-18 | 济南大学 | Fluid mass flow meter based on torsional vibration and detection method of fluid mass flow meter |
| CN105067060B (en) * | 2015-09-16 | 2018-02-02 | 济南大学 | A kind of liquid mass flow meter and its detection method based on torsional oscillation |
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