CN101149284A - Special-shaped cavity flow meter - Google Patents
Special-shaped cavity flow meter Download PDFInfo
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- CN101149284A CN101149284A CNA2007101564779A CN200710156477A CN101149284A CN 101149284 A CN101149284 A CN 101149284A CN A2007101564779 A CNA2007101564779 A CN A2007101564779A CN 200710156477 A CN200710156477 A CN 200710156477A CN 101149284 A CN101149284 A CN 101149284A
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Abstract
The invention discloses a shaped-chamber flowmeter including the seal cavity with the shaped-cylinder lumen, the inlet, the outlet and training slot. The rotor units composed by the decussation training slot, the first combination sliding plate, the second combination sliding plate and the permanent magnet is installed in the seal cavity. The shaped-chamber is composed of the semicircular contour, the 1/4 circular contour and 1/4 ellipse contour, which are all in same axis. The radius of semicircular contour and the 1/4 circular contour is equal to the semi-major axis and the semi-minor axis of 1/4 ellipse contour respectively. Two groups of sliding plates are installed in the decussation training slot. The rotor is in the same axis with each contour of lumen, the radius is equal to the radius of 1/4 circular contour, which are slip fit and rotate combined with the combination sliding plate and cavity wall under the flux pressure error. The two sliding plates slide in cross under the work of the 1/4 ellipse contour. The rotor rotates by one circle which mean that there has the equal fluid flow through the cavity, so it can reach the fluid meter.
Description
Technical field
The present invention relates to abnormal chamber flowmeter, belong to sensor and field of measuring techniques.
Background technology
Flowmeter is a crucial measuring instrument in commercial production and commerce and trade and other many fields, according to structure and principle of work different, flowmeter roughly can be divided into types such as volumeter, differential pressure flowmeter, suspended body flowmeter, mass flowmeter, turbo flow meter, vortex shedding flow meter, electromagnetic flowmeter, ultrasonic flow meter.Wherein, volumeter is generally considered to be the highest flowmeter of measuring accuracy.Except that the measuring accuracy height, volumeter has also that the high viscosity liquid of being suitable for metering, flow range degree are wide, the piping erection condition does not influence advantages such as measuring accuracy, but this class flowmeter have again simultaneously complex structure, volume big, can survey medium restricted strong, be easy to generate noise, may occur pulsing, may reverse, poor stability shortcomings such as (stuck easily), make its practical application have significant limitation.
Summary of the invention
The objective of the invention is fluid flow metering for the fluid flow in commercial production metering, domestic use of water metering and other field provide a kind of simple in structure, precision is high, good reliability, be convenient to the abnormal chamber flowmeter of digitizing and automation application.
Abnormal chamber flowmeter provided by the invention comprises by the cavity that has irregular cylinder inner chamber, import, outlet and diversion trench and is installed in the lower cover of cavity both ends of the surface and the annular seal space that upper cover plate constitutes, rotor assembly is installed in annular seal space, and rotor assembly is made of the cylindrical rotor, first Combined gliding plate, second Combined gliding plate and the permanent magnet that have right-angled intersection gathering sill and following centration axis and last centration axis; The irregular cylinder inner chamber of cavity is combined by a semicircle cambered surface, 1/4 arc surface, 1/4 elliptical arc surface and a transition face, semicircle cambered surface, 1/4 arc surface and 1/4 elliptical arc surface coaxially to each other, the radius R of semicircle cambered surface
1The major semi-axis R of=1/4 elliptical arc surface, the radius R of 1/4 arc surface
2The minor semi-axis r of=1/4 elliptical arc surface, the major axis end points and the semicircle cambered surface of 1/4 elliptical arc surface are tangent, form smooth transition, the minor axis end points and 1/4 arc surface of 1/4 elliptical arc surface are tangent, form smooth transition, the semicircle cambered surface is connected by transition face with 1/4 arc surface, forms the ladder transition; Import on the cavity is opened in half district of semicircle cambered surface near 1/4 arc surface, and outlet is opened in the zone of 1/4 elliptical arc surface; Diversion trench is opened in the 1/4 elliptical arc surface zone of cavity, and to outlet, the forward position of diversion trench and semicircle cambered surface and 1/4 elliptical arc surface intersect simultaneously from the major semi-axis end points of 1/4 elliptical arc surface;
The radius R of rotor
3Equal the radius R of 1/4 arc surface
2The height of rotor equates with the height of cavity, epitrochanterian right-angled intersection gathering sill is made up of first gathering sill and second gathering sill, the spigot surface of these two gathering sills all is parallel to the axis of rotor, first gathering sill and second gathering sill all are centrosymmetric, all along the radially incision rotor body certain depth of rotor, the incision section connects along the axis direction of rotor the both wings of each gathering sill simultaneously; The middle part of first gathering sill is a rectangular opening, makes the radially perforation of this gathering sill along rotor; Second gathering sill is then cut the rotor body certain depth at the axis direction of rotor respectively by the lower surface and the upper surface of rotor, incision part is simultaneously along the radially perforation of rotor, and passes between the middle part rectangular opening of the bottom of the following centration axis of rotor and last centration axis and first gathering sill respectively; First Combined gliding plate is installed in sliding matching mode in first gathering sill of rotor, and second Combined gliding plate is installed in second gathering sill of rotor with sliding matching mode; On the upper surface of rotor, be provided with the hole that holds permanent magnet; Rotor assembly cooperates with the dead eye rotation of lower cover and upper cover plate respectively by epitrochanterian centration axis down and last centration axis, can in annular seal space, rotate, the face of cylinder and being slidingly matched of 1/4 arc surface of irregular cylinder inner chamber of rotor assembly by rotor, being slidingly matched of the lower surface of rotor and lower cover, being slidingly matched of the upper surface of rotor and upper cover plate, the semicircle cambered surface of first Combined gliding plate and second Combined gliding plate and irregular cylinder inner chamber is slidingly matched, and being slidingly matched of first Combined gliding plate and first gathering sill and being slidingly matched to constitute and letting out the motive seal system in preventing of second Combined gliding plate and second gathering sill.
Among the present invention, the lower surface and the upper surface of cavity are smooth flat, and the two is parallel to each other and perpendicular to the axis of each cambered surface of irregular cylinder inner chamber, the upper and lower end face of cavity and upper and lower cover plate, rely on the plane to cooperate to realize the cavity sealing.
Among the present invention, first Combined gliding plate can adopt by two block-shaped and measure-alike T shape plate and flexible members and combine, the bottom of two blocks of T shape plates mutually over against, flexible member is between the bottom of two blocks of T shape plates; Second Combined gliding plate can adopt by two block-shaped and measure-alike trough plate and two flexible members and combine, the groove leg of two trough plates mutually over against, two flexible members lay respectively between the groove leg; Constitute the T shape plate of first Combined gliding plate thickness and first gathering sill (width equate; The thickness that constitutes the trough plate of second Combined gliding plate equates with the width of second gathering sill; The height of Combined gliding plate and the height of Combined gliding plate are equal to the height of rotor.
The structure and the matching relationship of abnormal chamber flowmeter critical part are: two centration axis of rotor are coaxial with the face of cylinder of rotor body, first Combined gliding plate and second Combined gliding plate are installed in first gathering sill and second gathering sill of rotor respectively with sliding matching mode, each Combined gliding plate can slide along the direction perpendicular to rotor axis in the gathering sill of oneself, permanent magnet is fixed on the end face of rotor, rotor and two groups of Combined gliding plates formation rotor assembly that is assembled together.Lower cover and upper cover plate are separately fixed on the lower surface and upper surface of cavity, and cavity and lower cover and upper cover plate constitute annular seal space.Two centration axis of rotor assembly by rotor cooperate with dead eye on lower cover and the upper cover plate respectively, are positioned in the annular seal space.The lower surface of rotor cooperates with the smooth flat of lower cover, and the upper surface of rotor cooperates with the smooth flat of upper cover plate, and the face of cylinder of rotor cooperates with 1/4 arc surface of irregular cylinder inner chamber.The lower surface of two groups of Combined gliding plates cooperates with the smooth flat of lower cover, and the upper surface cooperates with the smooth flat of upper cover plate.The two ends of Combined gliding plate (being the arc surface top of T shape plate and the arc surface top of trough plate) are kept in touch with the inner chamber of irregular cylinder and to be cooperated under the thrust that flexible member produces.The matching relationship of the structure of rotor assembly and annular seal space and rotor assembly and annular seal space makes the rotor assembly can be around the axis folk prescription of bearing to continuous rotation, and Combined gliding plate also can slide in the gathering sill of rotor in rotor rotation.(being slidingly matched of 1/4 arc surface of the face of cylinder of rotor assembly and irregular cylinder inner chamber of each sliding friction pair in annular seal space, being slidingly matched of the lower surface of rotor and lower cover and being slidingly matched of upper surface and upper cover plate, being slidingly matched and being slidingly matched of first Combined gliding plate and first gathering sill and being slidingly matched of second Combined gliding plate and second gathering sill of the semicircle cambered surface of first Combined gliding plate and second Combined gliding plate and irregular cylinder inner chamber) all enough hour (regarding the zero stand-off in theory as cooperates) of tolerance clearance, rotor assembly and annular seal space just constitute the motive seal system of a no internal leakage.
When abnormal chamber flowmeter was in running order, the pressure differential of fluid drove the rotor assembly rotation between its import and the outlet.In the rotation process of rotor assembly, 1/4 elliptical arc surface promotes first Combined gliding plate and second Combined gliding plate intersection is slided, when the end of first Combined gliding plate contacts with the linking line of 1/4 elliptical arc surface and semicircle cambered surface and the end of second Combined gliding plate contacts with the middle part of semicircle cambered surface or the end of second Combined gliding plate contacts with the linking line of 1/4 elliptical arc surface and semicircle cambered surface and the end of first Combined gliding plate when contacting with the middle part of semicircle cambered surface, in the semicircle cambered surface, form an orthobaric volume between first Combined gliding plate and second Combined gliding plate, it's a week is past the rotor assembly revolution, have the fluid of 4 orthobaric volumes to flow into annular seal space from import, the fluid that has 4 standards appearances to move simultaneously flows out annular seal space by outlet; Permanent magnet and centration axis can be used as two kinds of multi-form signal generators, send the signal of rotor rotation week number outside annular seal space, are used for the flow of meter fluid.
Beneficial effect of the present invention: (1) utilizes the irregular cylinder cavity and has the rotor assembly cooperating of right-angled intersection Combined gliding plate, realize using the normal capacity metered flow, can stop in the fluid by suitable motive seal design simultaneously and let out, therefore can reach higher measuring accuracy.(2) according to the structure and the principle of work of flowmeter, as long as there is fluid to pass through flowmeter, the rotor assembly of flowmeter will rotate, so the flowmeter sensitivity height, and the initiating flow is little.(3) rotor assembly can only forward rotation, can not backward rotation, so flowmeter has one-way, is particularly suitable for the application scenario that one-way requires.(5) flexible member makes the variable-length of Combined gliding plate, so rotor assembly has wear automatic-compensation ability and certain anti-jamming ability.These two characteristics, the former helps flowmeter to keep stable accuracy, and the latter makes flowmeter have security preferably.(6) can adopt transmission magnetic-pulse and machinery output dual mode metered flow, so flowmeter use dirigibility is good, is convenient to realize digitizing, networking.(7) design proposal that adopts the irregular cylinder inner chamber to cooperate with the rotor assembly that has the right-angled intersection Combined gliding plate, make flowmeter simple structure, number of spare parts few, can get arbitrary orientation reliable operation is installed, and production cost and working service cost are low, applied widely.
Description of drawings
Fig. 1 is the structure and the principle of work synoptic diagram of abnormal chamber flowmeter;
Fig. 2 is the longitudinal sectional drawing of abnormal chamber flowmeter;
Fig. 3 is the structural representation of shaped cavity;
Fig. 4 is the structural representation of the rotor of band right-angled intersection gathering sill;
Fig. 5 is the synoptic diagram of T shape plate;
Fig. 6 is the synoptic diagram of trough plate;
Fig. 7 is the synoptic diagram of the Combined gliding plate that is made of two blocks of T shape plates and flexible member;
Fig. 8 is the synoptic diagram of the Combined gliding plate that is made of two trough plates and flexible member;
Fig. 9 is the synoptic diagram of orthobaric volume.
Embodiment
Referring to figs. 1 through Fig. 9.Abnormal chamber flowmeter provided by the invention, comprise by the cavity 1 that has irregular cylinder inner chamber, import 6, outlet 7 and diversion trench 34 and be installed in lower cover 31 on cavity 1 both ends of the surface and annular seal space that upper cover plate 32 constitutes, rotor assembly is installed in annular seal space, rotor assembly by have the right-angled intersection gathering sill and cylindrical rotor 2, first Combined gliding plate 3, second Combined gliding plate 4 and permanent magnet 5 constitute; Rotor assembly cooperates with dead eye 33 on the upper and lower cover plate by epitrochanterian down centration axis 15 and last centration axis 16, and upper and lower two centration axis of rotor are coaxial with the cylindrical body of rotor, (seeing Fig. 1 and Fig. 2).The irregular cylinder inner chamber of cavity 1 is combined by the transition face 11 of a semicircle cambered surface 8, one 1/4 arc surface 9,1/4 elliptical arc surface 10 and a flat shape, semicircle cambered surface 8,1/4 arc surface 9 of irregular cylinder inner chamber and 1/4 elliptical arc surface 10 coaxially to each other, the radius R of semicircle cambered surface 8
1The major semi-axis R of=1/4 elliptical arc surface 10, the radius R of 1/4 arc surface 9
2The minor semi-axis r of=1/4 elliptical arc surface 10; The major axis end points and the semicircle cambered surface 8 of 1/4 elliptical arc surface 10 are tangent, form smooth transition; The minor axis end points of 1/4 elliptical arc surface 10 and 1/4 arc surface 9 are tangent, form smooth transition; Semicircle cambered surface 8 is connected by transition face 11 with 1/4 arc surface 9, forms the ladder transition; The lower surface 13 and the upper surface 14 of cavity are smooth flat, and the two is parallel to each other and perpendicular to the axis of each cambered surface of irregular cylinder inner chamber, (see figure 3).The upper and lower end face 14,13 of cavity 1 and upper and lower cover plate 32,31 rely on the plane to cooperate and make cavity 1 sealing.
The import 6 of cavity 1 is opened on the semicircle cambered surface 8 in half district near 1/4 arc surface 9, and outlet 7 is opened in the zone of 1/4 elliptical arc surface 10, and import 6 generally is on the position coaxial (see figure 3) with outlet 7.In the zone of 1/4 elliptical arc surface 10 of cavity 1, to outlet 7, be processed with a diversion trench 34 from the major semi-axis end points of 1/4 elliptical arc surface 10, be used for the decompression and the discharge of exit fluid.Intersect simultaneously with semicircle cambered surface 8 and 1/4 elliptical arc surface 10 in the forward position 35 of diversion trench 34.In order to be connected with the upstream and downstream pipeline, import 6 should be processed with syndeton, for example pipeline thread with outlet 7.The exterior side wall 12 of cavity 1 is generally the face of cylinder.For lower cover 31 and upper cover plate 32 are installed, can be on the lower surface 13 of cavity 1 and upper surface 14 the some threaded holes of processing, as shown in Figure 3.Make the material of cavity 1, should select according to character, duty parameter and other technical requirement of metering medium, for example cast iron, cast steel, stainless steel, aldary etc.
Lower cover 31 and upper cover plate 32 are generally circular dull and stereotyped, and diameter is identical with the external diameter of cavity 1, and the material of two cover plates can be identical with the material of cavity 1.When adopting permanent magnet as the metering signal sending device, make the material of lower cover 31 and upper cover plate 32, except that character, duty parameter and other technical requirement of considering the metering medium, also must satisfy the magnetic flux requirement, therefore should use nonferromagnetic material, for example stainless steel, aldary, aluminium alloy etc.
The structure of rotor 2 as shown in Figure 4, the body of rotor 2 is cylindrical, is processed with down centration axis 15 and last centration axis 16, first gathering sill 17 and second gathering sill 18 and permanent magnet on it and holds hole 19.Following centration axis 15 and last centration axis 16 are coaxial with the body of rotor 2.The spigot surface of first gathering sill 17 and second gathering sill 18 all is parallel to the axis of rotor 2, and vertical mutually, constitutes space right-angled intersection gathering sill.The shape of first gathering sill 17 and second gathering sill 18 all is centrosymmetric, and all along the radially incision rotor body certain depth of rotor 2, the incision section while is along the axial perforation of rotor 2 for the both wings of each gathering sill.The middle part of first gathering sill 17 is rectangular openings, and this gathering sill is radially connected on rotor 2; Rotor 2 certain depths are cut along the axis direction of rotor 2 respectively in 18 lower surface 20 and upper surfaces 21 by rotor 2 of second gathering sill, and the incision part along the radially perforation of rotor 2, forms two rectangular openings respectively in the bottom of following centration axis 15 and last centration axis 16 simultaneously.Permanent magnet holds hole 19 and is positioned on the end face of rotor, and for example the upper surface 21, can be cylindrical bore, are used for fixing permanent magnet 5.The radius R of rotor 2
3The radius R of=irregular cylinder inner chamber 1/4 arc surface 9
2The size of the minor axis r of=irregular cylinder inner chamber 1/4 elliptical arc surface 10, the height of the body column part of rotor 2 equates with the height of cavity 1.Make the material of rotor 2, should determine according to character, duty parameter and other technical requirement of metering medium equally, for example use materials such as stainless steel, aldary.
In the legend, first Combined gliding plate 3 is combined by two block-shaped and measure-alike T shape plate 22 and flexible members 29, and the top 24 of T shape plate 22 is an arc surface, as shown in Figure 5.In working order down, the bottom 27 of two blocks of T shape plates 18 mutually over against, flexible member 29 makes two T-shape ski boards produce mutual thrust between the bottom 27 of two blocks of T shape plates, as shown in Figure 7.Second Combined gliding plate 4 is combined by two block-shaped and measure-alike trough plate 23 and two flexible members 30, and the top 25 of trough plate 23 is an arc surface, as shown in Figure 6.In working order down, the groove leg 28 of two trough plates 23 mutually over against, two flexible members 30 lay respectively between two groove legs 28, make two trough plates produce mutual thrust, as shown in Figure 8.Flexible member 29 and flexible member 30 can adopt cylindrically coiled spring, also can adopt the spring or the shell fragment of other type.The installing and locating of flexible member 29 and flexible member 30 can for example adopt cylindrical bore 26 to put spring, (see figure 5) according to the type design of flexible member.Constitute the T shape plate 22 of first Combined gliding plate 3 and the trough plate 23 of formation second Combined gliding plate 4, its thickness width with first gathering sill 17 and second gathering sill 18 respectively is identical.The height of first Combined gliding plate 3 and second Combined gliding plate 4 is equal to the height of rotor 2.The equal in length of first Combined gliding plate 3 and second Combined gliding plate 4, at flexible member by compression state not, the length of first Combined gliding plate 3 and second Combined gliding plate 4 all should be slightly larger than the radius R of irregular cylinder inner chamber semicircle cambered surface 8
1Radius sum R with 1/4 arc surface 9
1+ R
2Under the state of two ends pressurized, the length of first Combined gliding plate 3 and second Combined gliding plate 4 should be able to be slightly less than the radius R of semicircle cambered surface 8
1Radius sum R with 1/4 arc surface 9
1+ R
2Make the material of T shape plate 22 and trough plate 23, should consider, for example use materials such as stainless steel, aldary with rotor 2 and cavity 1 unification.Make the material of flexible member 29 and flexible member 30, mainly determine, can use materials such as stainless steel, aldary, elastoplast according to factors such as the character of measuring medium, duty parameter, mission lives.
The package program of flowmeter is: (1) is inserted into two blocks of 22 pairs of T shape plates in first gathering sill 17, before inserting, utilize earlier and hold hole 26 flexible member 29 of packing between two blocks of T shape plates 22, the bottom 27 of T shape plate 22 should enter the rectangular opening at first gathering sill, 17 middle parts, as shown in Figure 2.Two blocks of T shape plates 22 and flexible member 29 are fitted together, and constitute first Combined gliding plate 3.Then, 23 pairs of two trough plates are inserted in second gathering sill 18, before inserting, also want the flexible member 30 of between the groove leg 28 of two trough plates 23, packing into earlier, two rectangular openings of centration axis 15 and last centration axis 16 bottoms can be used for putting flexible member 30 under being positioned on second gathering sill 18, as shown in Figure 2.Two trough plates 28 and flexible member 30 are fitted together, and constitute second Combined gliding plate 4.The assembly of first Combined gliding plate 3 and second Combined gliding plate 4 and rotor 2 constitutes rotor assembly.(2) rotor assembly is inserted the inner chamber of cavity 1, the face of cylinder of rotor 2 is cooperated with 1/4 arc surface 9 of irregular cylinder inner chamber, following centration axis 15 on the rotor 2 and centration axis 16 are cooperated with dead eye 33 on lower cover 31 and the upper cover plate 32 respectively, with screw lower cover 31 and upper cover plate 32 are separately fixed on the lower surface 13 and upper surface 14 of cavity 1, form seal chamber, as shown in Figure 2.
Tolerance clearance is a key factor that realizes the present invention and obtain the good technique performance, should in control, let out and rotary resistance two aspect take the circumstances into consideration balance.
The output of flowmeter flow signal both can adopt permanent magnet to send magnetic-pulse, also can adopt the mechanical rotation of centration axis output rotor.Therefore, the present invention also needs to connect instrument such as corresponding magnetoelastic transducer, digital indicator or mechanical counter in actual applications, adopts prior art to get final product.
Concrete principle of work of the present invention is:
(1) drive principle of rotor assembly: as seen from Figure 1, no matter which position rotor assembly is on, always have in the upper half that more than half section of one group of Combined gliding plate be in irregular cylinder inner chamber semicircle cambered surface 8, and the front portion of this section is stretched out rotor 2 and is contacted with semicircle cambered surface 8, as long as the hydrodynamic pressure at import 6 places is greater than the hydrodynamic pressure at outlet 7 places, the both sides of this Combined gliding plate extension just have pressure differential, this pressure differential promotes rotor assembly and is rotated counterclockwise the rotor assembly moment that rotates.
(2) principle of flow metering: because first Combined gliding plate 3 and second Combined gliding plate 4 square crossing always, when wherein one group of Combined gliding plate was in horizontal level, another group Combined gliding plate then just was in vertical position, as shown in Figure 9.At this moment, the segment space that is surrounded by two groups of Combined gliding plates and irregular cylinder inner chamber semicircle cambered surface 8 upper halfs in the annular seal space constitutes an orthobaric volume, and it's a week is past the rotor assembly revolution, has the fluid of 4 orthobaric volumes to be discharged by outlet.The segment space that constitutes orthobaric volume is the metric space of flowmeter, is also referred to as metering zone.
(3) the motion control principle of Combined gliding plate: the motion of examination Combined gliding plate, the initial position of establishing first Combined gliding plate 3 is a level, the initial position of second Combined gliding plate 4 is vertical.At this moment, the left end of first Combined gliding plate 3 is positioned at 1/4 elliptical arc surface 10 of inner chamber and the intersection of 1/4 arc surface 9, and its right-hand member is positioned at the mid point of semicircle cambered surface 8; The upper end of second Combined gliding plate 4 is positioned at 1/4 elliptical arc surface 10 of inner chamber and the intersection of semicircle cambered surface 8, and its lower end is positioned at the intersection of 1/4 arc surface 9 and transition face 11, as shown in figure 10.When rotor assembly under fluid pressure action when counterclockwise rotating, two Combined gliding plates rotate thereupon.First Combined gliding plate 3 is being forwarded in the process of upright position by counter clockwise direction by horizontal level, and when just half-twist was by metering zone, two ends kept respectively contacting with 1/4 arc surface 9 with the semicircle cambered surface 8 of inner chamber, therefore keeps static with respect to rotor 2.When first Combined gliding plate 3 forwards the upright position by horizontal level to by counter clockwise direction, second Combined gliding plate 4 forwards horizontal level by the upright position to by counter clockwise direction, its upper end enters 1/4 elliptical arc surface, 10 zones of inner chamber, and the other end then enters semicircle cambered surface 9 zones of inner chamber.The upper end of second Combined gliding plate 4 is in the motion in 1/4 elliptical arc surface, 10 zones, is that the major semi-axis end points from 1/4 elliptical arc surface 10 slides along the minor semi-axis end points of 1/4 elliptical arc surface 10 to 1/4 elliptical arc surface 10.Because the upper end of second Combined gliding plate 4 and the radius of 1/4 elliptical arc surface, 10 contacts site are the major radius R by ellipse
1Be reduced to short radius R gradually
2, therefore the other end of second Combined gliding plate 4 is in vacant state.Along with the variation of contact site, upper end, second this Combined gliding plate 4 slides in second gathering sill 18 of rotor 2 because of the thrust that is subjected to 10 generations of 1/4 elliptical arc surface, and until forwarding horizontal level to, slip stops.Rotor assembly is half-twist again, first Combined gliding plate 3 and second Combined gliding plate, 4 exchange status, promptly first Combined gliding plate 3 is because of sliding in first gathering sill 17 of rotor 2 under the effect of 1/4 elliptical arc surface 10, and second Combined gliding plate 4 keeps static by metering zone and with respect to rotor 2.After, repeat above process to the period of motion property of Combined gliding plate, referring to Fig. 1 and Fig. 9.
(4) control principle of letting out in the convection cell: all enough hour when all gaps that are slidingly matched of annular seal space rotor assembly and annular seal space inwall and rotor assembly displacement spare, rotor assembly just forms a motive seal mechanism in annular seal space, make fluid not flow to outlet 7 by import 6 in the mode of gap seepage.For actual product, the tolerance clearance of each sliding friction pair can not be zero, as long as but can guarantee that the internal leakage amount is no more than the permission limit, rotor assembly can easy running simultaneously, just can think to have reached desirable design.
(5) prevent the principle that rotor assembly reverses: suppose the hydrodynamic pressure of the hydrodynamic pressure of outlet 7 greater than import 6, make the rotor assembly reversing, as seen from Figure 1, when an end of one group of Combined gliding plate contacts with elliptical arc surface 11, its other end must be in semicircle cambered surface 8 zones, and be in vacant state, at this moment, the length of this group Combined gliding plate is because the effect of flexible member and greater than the radius R of semicircle cambered surface 8
1Radius R with 1/4 arc surface 9
2Sum R
1+ R
2When the free end backwards rotation of this Combined gliding plate during to 1/4 arc surface 9, can be subjected to the jam of transition face, stop reversing.
(6) prevent the principle that rotor assembly is stuck: the solid particle that contains in fluid enters the end arc surface zone of Combined gliding plate 3 or Combined gliding plate 4 and produces clamping stagnation and do the time spent, compression deformation can take place in the flexible member in the Combined gliding plate, the length of Combined gliding plate is reduced, thereby can be rotated further, be not stuck.
(7) principle of outlet decompression: the starting point of diversion trench 34 is positioned at the major semi-axis end points place of 1/4 elliptical arc surface 10, make fluid firm once entering 1/4 elliptical arc surface zone and outlet 7 UNICOMs, therefore pressure in time descends, and adjacent orthobaric volume fluid can closely continue by outlet 7 outflows front and back.Diversion trench 34 is simultaneously also to going out to flow " smoothly " effect.
Claims (3)
1. abnormal chamber flowmeter, it is characterized in that this flowmeter comprises by having irregular cylinder inner chamber, import (6), export the cavity (1) of (7) and diversion trench (34) and being installed in the lower cover (31) of cavity (1) both ends of the surface and the annular seal space that upper cover plate (32) constitutes, rotor assembly is installed in annular seal space, and rotor assembly is made of the cylindrical rotor (2), first Combined gliding plate (3), second Combined gliding plate (4) and the permanent magnet (5) that have right-angled intersection gathering sill and following centration axis (15) and last centration axis (16); The irregular cylinder inner chamber of cavity (1) is combined by a semicircle cambered surface (8), 1/4 arc surface (9), 1/4 elliptical arc surface (10) and a transition face (11), semicircle cambered surface (8), 1/4 arc surface (9) and 1/4 elliptical arc surface (10) coaxially to each other, the radius R of semicircle cambered surface (8)
1The major semi-axis R of=1/4 elliptical arc surface (10), the radius R of 1/4 arc surface (9)
2The minor semi-axis r of=1/4 elliptical arc surface (10), the major axis end points of 1/4 elliptical arc surface (10) and semicircle cambered surface (8) are tangent, form smooth transition, the minor axis end points of 1/4 elliptical arc surface (10) and 1/4 arc surface (9) are tangent, form smooth transition, semicircle cambered surface (8) is connected by transition face (11) with 1/4 arc surface (9), forms the ladder transition; Import (6) on the cavity (1) is opened in half district of semicircle cambered surface (8) near 1/4 arc surface (9), and outlet (7) is opened in the zone of 1/4 elliptical arc surface (10); Diversion trench (34) is opened in 1/4 elliptical arc surface (10) zone of cavity (1), and to outlet (7), the forward position (35) of diversion trench (34) is crossing simultaneously with semicircle cambered surface (8) and 1/4 elliptical arc surface (10) from the major semi-axis end points of 1/4 elliptical arc surface (10);
The radius R of rotor (2)
3Equal the radius R of 1/4 arc surface (9)
2, the height of rotor (2) equates with the height of cavity (1); Right-angled intersection gathering sill on the rotor (2) is made up of first gathering sill (17) and second gathering sill (18), the spigot surface of these two gathering sills all is parallel to the axis of rotor (2), first gathering sill (17) and second gathering sill (18) all are centrosymmetric, all along the radially incision rotor body certain depth of rotor (2), the incision section connects along the axis direction of rotor (2) both wings of each gathering sill simultaneously; The middle part of first gathering sill (17) is a rectangular opening, makes the radially perforation of this gathering sill along rotor (2); Second gathering sill (18) is then cut rotor (2) body certain depth along the axis direction of rotor (2) respectively by lower surface (20) and upper surface (21) of rotor (2), incision part is simultaneously along the radially perforation of rotor (2), and passes between the middle part rectangular opening of the bottom of the following centration axis (15) of rotor and last centration axis (16) and first gathering sill (17) respectively; First Combined gliding plate (3) is installed in sliding matching mode in first gathering sill (17) of rotor (2), and second Combined gliding plate (4) is installed in second gathering sill (18) of rotor (2) with sliding matching mode; On the upper surface (21) of rotor (2), be provided with the hole (19) that holds permanent magnet (5); Rotor assembly cooperates with dead eye (33) rotation of lower cover (31) and upper cover plate (32) respectively by following centration axis (15) on the rotor (2) and last centration axis (16), can in annular seal space, rotate, the face of cylinder and being slidingly matched of 1/4 arc surface of irregular cylinder inner chamber of rotor assembly by rotor (2), the lower surface (20) of rotor (2) and being slidingly matched of lower cover (31), the upper surface (21) of rotor (2) and being slidingly matched of upper cover plate (32), the semicircle cambered surface (8) of first Combined gliding plate (3) and second Combined gliding plate (4) and irregular cylinder inner chamber is slidingly matched, and first Combined gliding plate (3) and first gathering sill (17) be slidingly matched and second Combined gliding plate (4) and being slidingly matched of second gathering sill (18) constitute and let out the motive seal system in anti-.
2. abnormal chamber flowmeter according to claim 1, the lower surface (13) and upper surface (14) that it is characterized in that cavity (1) are smooth flat, the two is parallel to each other and perpendicular to the axis of each cambered surface of irregular cylinder inner chamber, the upper and lower end face (14) of cavity (1), (13) and upper and lower cover plate (32), (31) rely on the plane to cooperate the sealing that realizes cavitys (1).
3. abnormal chamber flowmeter according to claim 1, it is characterized in that first Combined gliding plate (3) is combined by two block-shaped and measure-alike T shape plate (22) and flexible members (29), the bottom (27) of two blocks of T shape plates mutually over against, flexible member (29) is positioned between the bottom (27) of two blocks of T shape plates; Second Combined gliding plate (4) is combined by two block-shaped and measure-alike trough plate (23) and two flexible members (30), the groove leg (28) of two trough plates mutually over against, two flexible members (30) lay respectively between the groove leg (28); The thickness that constitutes the T shape plate (22) of first Combined gliding plate (3) equates with the width of first gathering sill (17); The thickness that constitutes the trough plate (23) of second Combined gliding plate (4) equates with the width of second gathering sill (18); The height of the height of Combined gliding plate (3) and Combined gliding plate (4) is equal to the height of rotor (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101564779A CN100494915C (en) | 2007-11-01 | 2007-11-01 | Special-shaped cavity flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101564779A CN100494915C (en) | 2007-11-01 | 2007-11-01 | Special-shaped cavity flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101149284A true CN101149284A (en) | 2008-03-26 |
| CN100494915C CN100494915C (en) | 2009-06-03 |
Family
ID=39249916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101564779A Expired - Fee Related CN100494915C (en) | 2007-11-01 | 2007-11-01 | Special-shaped cavity flow meter |
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| Country | Link |
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| CN (1) | CN100494915C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015125A1 (en) * | 2009-08-03 | 2011-02-10 | 浙江大学 | Prime motor with special-shaped cavity |
| US20120164018A1 (en) * | 2009-08-03 | 2012-06-28 | Zhejiang University | Metering pump with special-shaped cavity |
| CN103913201A (en) * | 2014-04-12 | 2014-07-09 | 山西天赐霖泉能源科技有限公司 | Gas flowmeter with suspended single rotor |
| CN107389145A (en) * | 2017-06-16 | 2017-11-24 | 山西霖泉仪表有限公司 | Triangle single rotor flowmeter |
| CN107421595A (en) * | 2017-06-16 | 2017-12-01 | 山西霖泉仪表有限公司 | A kind of metering cell structure for flowmeter |
| CN108981836A (en) * | 2018-09-21 | 2018-12-11 | 重庆耐德工业股份有限公司 | A kind of measuring room component of graphite blade flowmeter |
| CN108981837A (en) * | 2018-09-21 | 2018-12-11 | 重庆耐德工业股份有限公司 | A kind of graphite blade flowmeter |
| CN117629330A (en) * | 2024-01-26 | 2024-03-01 | 云南都得利医疗器械有限公司 | Multifunctional oxygen flow metering device |
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2007
- 2007-11-01 CN CNB2007101564779A patent/CN100494915C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015125A1 (en) * | 2009-08-03 | 2011-02-10 | 浙江大学 | Prime motor with special-shaped cavity |
| US20120164018A1 (en) * | 2009-08-03 | 2012-06-28 | Zhejiang University | Metering pump with special-shaped cavity |
| US8974206B2 (en) * | 2009-08-03 | 2015-03-10 | Zhejiang University | Metering pump with special-shaped cavity |
| CN103913201A (en) * | 2014-04-12 | 2014-07-09 | 山西天赐霖泉能源科技有限公司 | Gas flowmeter with suspended single rotor |
| CN103913201B (en) * | 2014-04-12 | 2016-10-05 | 山西霖泉仪表有限公司 | Suspension single rotor gas flowmeter |
| CN107421595A (en) * | 2017-06-16 | 2017-12-01 | 山西霖泉仪表有限公司 | A kind of metering cell structure for flowmeter |
| CN107389145A (en) * | 2017-06-16 | 2017-11-24 | 山西霖泉仪表有限公司 | Triangle single rotor flowmeter |
| CN108981836A (en) * | 2018-09-21 | 2018-12-11 | 重庆耐德工业股份有限公司 | A kind of measuring room component of graphite blade flowmeter |
| CN108981837A (en) * | 2018-09-21 | 2018-12-11 | 重庆耐德工业股份有限公司 | A kind of graphite blade flowmeter |
| CN108981836B (en) * | 2018-09-21 | 2023-09-15 | 重庆耐德工业股份有限公司 | Metering chamber component of graphite scraper flowmeter |
| CN108981837B (en) * | 2018-09-21 | 2024-02-02 | 重庆耐德工业股份有限公司 | Graphite scraper flowmeter |
| CN117629330A (en) * | 2024-01-26 | 2024-03-01 | 云南都得利医疗器械有限公司 | Multifunctional oxygen flow metering device |
| CN117629330B (en) * | 2024-01-26 | 2024-04-05 | 云南都得利医疗器械有限公司 | Multifunctional oxygen flow metering device |
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|---|---|
| CN100494915C (en) | 2009-06-03 |
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