CN100520309C - Flow sensor and coupled type flow sensor - Google Patents
Flow sensor and coupled type flow sensor Download PDFInfo
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- CN100520309C CN100520309C CNB2006100535844A CN200610053584A CN100520309C CN 100520309 C CN100520309 C CN 100520309C CN B2006100535844 A CNB2006100535844 A CN B2006100535844A CN 200610053584 A CN200610053584 A CN 200610053584A CN 100520309 C CN100520309 C CN 100520309C
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Abstract
A high precision flow sensor comprises a rotor flow valve and a detecting element, wherein, a valve core of the rotor flow valve is synchronously connected with a shaft of the detecting element through a shaft. The invention is characterized in that the valve core of the rotor flow valve can adopt a gear engage type structure, a cycloid rotor type engaging structure, or an engage-locked rotor structure, thereby forming the flow sensor which has the advantages of little backmixing and high measurement precision, and is applicable to high pressure and high precision places.
Description
Technical field
The present invention relates to a kind of Hydraulic Field flow sensor.
Background technology
Hydraulic technique is day by day to integrated, intelligent direction development, therefore press for and be applicable to hydraulic system high pressure, high-precision cheap flow sensor, so that obtain more widespread use at aspects such as hydraulic control technology, hydraulic system parameters detection and intelligent fault diagnosis, present online hydraulic flow measurement means and measuring technique can't finely satisfy this requirement." photo-electric flow sensor " as utility model patent CN90224409.4, though the photo-electric flow sensor that it has used optical detection device and rotor mechanical textural association to form, but, because its patent is to adopt fairly simple impeller, so, there is very big back-mixing between the outlet of rotor flow valve and the import, discharge opeing is unclean, so this flow sensor measuring accuracy is not high, the hydraulic system that also is less compliant in high pressure is used.And this sensor is too simple, detecting unit also has only one, just can't use in case break down, the rotor flow valve structure is also too single, be not easy on multipath hydraulic synchro system or multithread amount matching system, use, more can't carry out the oneself and detect assessment, so, need development to be suitable for the high-performance flow sensor of hydraulic system.
Summary of the invention
Primary technical matters to be solved by this invention provides a kind of flow sensor, and its back-mixing is few, and the measuring accuracy height is adapted at high pressure, the application of high-acruracy survey place.
Another technical matters to be solved by this invention provides a kind of flow sensor, and it is adapted at using on multipath hydraulic synchro system or the multithread amount matching system, and the measuring accuracy height, and is rational in infrastructure simple, easy to manufacture and use.
Another technical matters to be solved by this invention provides a kind of flow sensor, and one of them measuring sensor uses as measuring, and another measuring sensor uses as data monitoring, makes testing result more reliable.
Another technical matters to be solved by this invention provides a kind of manifold type flow sensor, wherein two cover flow sensors both can work alone, again can be in synchronous working under the controller control, thereby can realize autodiagnosis, improve functional reliability, thereby widened range of application, and its structural design compactness, be convenient to make and install and use.
The present invention solves the technical scheme that above-mentioned primary technical matters adopts: a kind of flow sensor, it includes rotor flow valve and detecting element, the spool of rotor flow valve is connected with the rotating shaft synchronised of detecting element by rotating shaft, the spool that it is characterized in that described rotor flow valve adopts gear-engaged type structure, cycloid rotor type engaging structure, engagement type rotor structure, thereby constitutes flow sensor.
Useful is that described detecting element adopts photoelectric encoder, magnetic coder or speed measuring motor.
On the described technical foundation, described flow sensor is that many external gear wheel engagements or engagement type rotor are meshed being positioned in the relatively independent chamber separately, shared one road inlet of chamber separately, and all there is the independent liquid outlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other axles are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in inboard, the overhanging place of axle, and shared rotating shaft is by its sponson and photoelectric encoder, the rotating shaft of magnetic coder or speed measuring motor connects; Or, described flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked mechanical engagement rotor, shared one road liquid outlet of each chamber, and all there is the independent inlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in inboard, the overhanging place of axle, and shared rotating shaft is by its sponson and photoelectric encoder, the rotating shaft of magnetic coder or speed measuring motor connects.
The present invention solves the technical scheme that above-mentioned another technical matters adopts: a kind of flow sensor, on above-mentioned technical foundation, described flow sensor is that the rotating shaft two ends with the rotor flow valve spool extend out respectively with the rotating shaft synchronised of detecting element separately and are connected.
The present invention solves the technical scheme that above-mentioned another technical matters adopts: a kind of manifold type flow sensor, on above-mentioned technical foundation, described flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and at the inlet of the outlet of the rotor flow valve on the in-line by the rotor flow valve of embedded solenoid valve tieback on return line.For guaranteeing the loop reliably working, the upstream, rotor flow valve porch on return line is set up a non-return retaining valve separately, with the accuracy of assurance measurement and the operate as normal of system circuit.
As improvement, described flow sensor is integrated in two cover rotor flow valves on the rotor flow valve piece, two cover flow sensors both can work alone, again can be under the effect of middle controller solenoid valve synchronous working together, it is I, II, three workspaces of III that this valve piece constitutes internal separation, the I district is sensor G1 workspace, and the II district is sensor G2 workspace, and I district and II district are relatively independent; The III district is the control zone, and promptly the association area of G1 and G2 starts to control making usefulness to the working method of G1 and G2, and the modular construction compact and reasonable is convenient to manufacture and install and use like this.
Further improve again, described flow sensor adopts embedded solenoid directional control valve in the III district, solenoid directional control valve is by solenoid, be arranged in the spool of valve piece cavity, spring, passage on spool is formed, wherein the inlet of reversal valve is opened on I district sidewall, the reversal valve outlet is left on II district sidewall, passage on the spool is communicated with the outlet of the inlet of reversal valve and reversal valve respectively or blocks cooperation, be supported with spring between the lower end of spool and the valve piece cavity, the upper end of spool has disposed solenoid, channel diameter on the spool is generally got 1-6mm, this structural design is simply compact, and volume is little, conveniently installs and uses.
The present invention solves the technical scheme that above-mentioned another technical matters adopts: a kind of manifold type flow sensor, on above-mentioned technical foundation, described flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and the outlet of the rotor flow valve on in-line is by solenoid valve tieback fuel tank, simultaneously, be connected with the Coupling Control Unit of interlock between the two cover flow sensors, Coupling Control Unit and solenoid valve action are synchronously.
Further improve again, described flow sensor is integrated in two cover rotor flow valves on the rotor flow valve piece, two cover flow sensors both can work alone, again can be under the Coupling Control Unit effect synchronous working together, it is I, II, three workspaces of III that this valve piece constitutes internal separation, the I district is sensor G1 workspace, and the II district is sensor G2 workspace, and I district and II district are relatively independent; The III district is the control zone, and promptly the association area of G1 and G2 starts to control making usefulness to the working method of G1 and G2, and the modular construction compact and reasonable is convenient to manufacture and install and use like this.
As improvement, described flow sensor adopts embedded solenoid directional control valve in the III district, solenoid directional control valve is by solenoid, spool in valve piece cavity, spring is formed, wherein the inlet of reversal valve is by unloading circulation road and being communicated with in the outlet of the rotor flow valve in I district, reversal valve outlet is communicated with opening at III district sidewall upper outlet by unloading circulation road, and tieback fuel tank, be supported with spring between one end of spool and the valve piece cavity, in III district valve piece cavity, be provided with electromagnetic clutch as Coupling Control Unit, clutch is carried out in the rotating shaft of control rotor flow valve, the solenoid of the coil double as solenoid directional control valve of electromagnetic clutch, unload the circulation road diameter and generally get 1-6mm, this structural design is simply compact, and volume is little, conveniently installs and uses.
As improvement, described flow sensor is adopting the coupling wheel of Electromagnetic Control as Coupling Control Unit in the III district, coupling wheel respectively with two the cover detecting elements rotating shaft on gear carry out clutch, coupling wheel is connected on the connecting rod, connecting rod is inserted into fixedly in the chute, the connecting rod lower end is connected with the end cap of solenoid by spring, simultaneously, on connecting rod, have aperture, respectively with unload circulation road and be connected or block cooperation, and unload circulation road one end and be communicated with in the outlet of the rotor flow valve in I district, unload the circulation road other end to be communicated with opening at III district sidewall upper outlet, and the tieback fuel tank, unload the circulation road diameter and generally get 1-6mm, this structural design is simply compact, and volume is little, conveniently installs and uses.
Compared with prior art, the invention has the advantages that: the first, the flow valve rotor of this sensor has adopted the few engagement rotor of back-mixing right, so the measuring accuracy height is suitable for the demand of high precision or high-pressure system; The second, the present invention designs multicore coaxial rotor flow valve simultaneously, and high-precise synchronization valve and flow sensor are organically combined together, has reduced the use of Hydraulic Elements, is adapted at using on multipath hydraulic synchro system or the multithread amount matching system; The 3rd, the present invention also designs the flow sensor of the two detecting elements of band, that is, a sensor is with two detecting elements simultaneously, and a measuring sensor uses as measuring, and another measuring sensor uses as data monitoring, makes testing result more reliable; The 4th, the present invention also designs the sensor module that two cover flow sensors are designed to intercouple simultaneously, it both can work alone, again can be in synchronous working under the controller control, thus can realize autodiagnosis, make sensor that intelligentized characteristic arranged, improved functional reliability, widened range of application, and the overall construction design compactness, be convenient to make and install and use.
Description of drawings
Fig. 1 a is one of structural representation of high-precision flow sensor of the present invention
Fig. 1 b is one of structural representation of high-precision flow sensor of the present invention
Fig. 1 c is one of structural representation of high-precision flow sensor of the present invention
Fig. 1 d is one of structural representation of high-precision flow sensor of the present invention
Fig. 2 a is one of rotor flow valve valve core structure synoptic diagram of the present invention
Fig. 2 b is one of valve core structure synoptic diagram of rotor flow valve of the present invention
Fig. 2 c is one of valve core structure synoptic diagram of rotor flow valve of the present invention
Fig. 3 a is multicore coaxial rotor flow valve structural representation among the present invention
Fig. 3 b is multicore coaxial rotor flow valve structural representation among the present invention
Fig. 4 a is one of application principle figure of manifold type high-precision flow sensor among the present invention
Fig. 4 b is one of application principle figure of manifold type high-precision flow sensor among the present invention
Fig. 5 a is one of structural representation of manifold type high-precision flow sensor among the present invention
Fig. 5 b is one of structural representation of manifold type high-precision flow sensor among the present invention
Fig. 5 c is one of structural representation of manifold type high-precision flow sensor among the present invention
Fig. 6 a is one of hydraulic system instrumentation plan
Fig. 6 b is one of hydraulic system instrumentation plan
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As schematically shown in Figure 1, be Fig. 1 a-d, this kind high-precision flow sensor, it includes rotor flow valve and detecting element, the spool of rotor flow valve is connected with the rotating shaft synchronised of detecting element by rotating shaft, the spool that it is characterized in that described rotor flow valve adopts gear-engaged type structure, cycloid rotor type engaging structure or engagement type rotor structure, thereby constitutes flow sensor.Described detecting element adopts photoelectric encoder, magnetic coder or speed measuring motor.Wherein rotor flow valve piece A is the basic component and the core parts place of this combination valve, it is the rotative mechanism arrangement that a kind of inner structure is similar to oil motor, its critical component is the rotatable parts of a built-in Room or multicell, multicell can be meant two Room or more than two Room, controlled fluid can not flow freely mutually.For saying something conveniently, this paper claims the rotatable parts in this chamber to be " movement ", its kind of the rotor part of this movement as shown in Figure 2, Fig. 2 a is that cycloid rotor is right, Fig. 2 b is that gear mesh is engagement type, Fig. 2 c is engage-locked novel rotor mechanical type.Above-mentioned all structures, their common trait is: have the pair of meshing rotor at least in the chamber that is placed in the rotor valve seat, and stretch out housing outside the one or both ends of the rotating shaft of this rotor, can link to each other synchronously with detecting element B by this rotating shaft; On every chamber housing of every rotor flow valve piece A, all have inlet and liquid outlet, inlet zone and liquid outlet zone are that movement is separated by rotor, high-pressure fluid enters from inlet and drives the rotating shaft rotation in the chamber, and the liquid after the acting all is discharged to liquid outlet from the opposite side of this chamber; In chamber interior, every rotating shaft is by rolling bearing or sliding bearing support and connection, and an end of outrigger shaft is provided with rotating shaft sealing, to prevent that liquid is by the rotating shaft clearance leakage.
Among the present invention, the effect of rotor flow valve piece A is the liquid form that is used for changing fluid, fluid is cut apart continuously, isolated, make it to survey, controlled, be convenient to quantize, rotor flow valve externally has output shaft, the parts that link to each other with this are photoelectric encoder, magnetic coder or speed measuring motor, and the externally acting separately hardly of valve piece, and oil motor mainly is to be applied to the externally mechanical organ of acting, this is the place that this valve piece is different from oil motor on function.
Usually, for the low-pressure fluid system, use blade (or impeller) formula rotor structure and have simple in structure, in light weight and certain superiority of effectiveness such as measuring accuracy; And for high pressure liquid system, using the engagement type or cycloid rotor type engaging structure of gear mesh to be suitable for high-precision sensor uses, if select for use as the novel engagement type rotor machinery of Fig. 2 c and be cassette mechanism structure, this structure is kept apart fully importing and exporting fluid, discharge opeing is clean, and measuring accuracy can do more, and has and operate steadily, the characteristics that noise is little, suggestion is preferentially selected for use.
Multicore coaxial rotor flow valve structure is designed to such, the internal machine core of this rotor flow valve can be multicell coaxial rotor mechanical part, as Fig. 3 a, shown in the 3b, be a kind of sectional view and cross-sectional view of coaxial spool of built-in external gear pump rotor, three external gear wheels engagement rotor is placed in three relatively independent chambers 6,7,8, three shared one road inlets of chamber, and all there is own independent liquid outlet in every chamber.Three pairs of rotor totally 4 rotating shafts, every chamber internally meshed rotor of this movement is to shared at least same rotating shaft, and all the other rotating shafts are not limited.Shared rotating shaft or non-shared rotating shaft come support and connection in chamber separately by slip or rolling bearing separately, and as Fig. 3, label 1 is non-shared bearing, totally 6, label 2 is shared shaft bearing, totally 2, label P is common inlet, and label P1, P2, P3 are liquid outlet separately; Label 3 is the axle envelope, and in the bearing outside, it act as and prevents the valve body external leakage; Numbering 4 is shared rotating shaft, and reliably is connected by the rotating shaft of its sponson with photoelectric encoder or speed measuring motor, and label 5 is the rotor flow valve seat.Usually, the coaxial valve block structure that is positioned over a valve body can be applicable in the multiloop loop system in the multi-cavity chamber, and this valve piece can have the multichannel liquid inlet and outlet, if be applied to hydraulic system multichannel synchro system, then this valve can shared one road inlet and multichannel liquid outlet; If be applied to multiple liquid proportioning place, then this valve is the multichannel inlet, and shared one road liquid outlet.For ease of style of writing, might as well claim the movement of this structure to be " multicore coaxial rotor flow valve " at this paper, and aforementioned single core rotor structure valve is called " single core rotor flow valve ".Single core rotor flow valve piece is selected in general place for use, multicore rotor flow valve piece then is suitable for the multipath hydraulic synchro system or multithread amount matching system uses, this multicore valve piece both can have been made multipath hydraulic synchronous valve (liquid is banishd than valve) and use, the basic valve piece that can doublely make flow sensor again uses, and realizes that a valve is multi-functional.
The engagement rotor of mandrel was to both can horizontal positioned also can vertically placing, and placement direction does not influence any function of combination valve, and concrete modes of emplacement can be decided according to actual conditions.
As Fig. 1, the present invention combines high-precision flow sensor by rotor flow valve A, electrical element B spare; Detecting element B can select for use rotary encoder to form the digital flow sensor, and is optional as the case may be with photoelectric encoder or magnetic coder; Detecting element B also can select for use speed measuring motor then to form the novel analog flow sensor.In modern industry, scrambler is used widely, so preferentially selecting for use photoelectric encoder to carry out flow sensor, suggestion sets up, if do not specialize, the detecting element of Chu Xianing all refers to " photoelectric encoder " hereinafter, and " the photoelectric figure formula rotor flow sensor " of Gou Jianing abbreviates " photocurrent quantity sensor " as thus.
The photocurrent quantity sensor that the present invention is combined by AB, internal chamber quantity or chamber configuration principle difference by rotor flow valve A can be set up: the intelligent three major types flow sensor of basic model, extended pattern and duplex, if every rotor flow valve piece A links to each other with 2 detecting element B simultaneously, then can form redundancy-type intelligent flow sensor.The concrete building method of this four large sensor is described respectively below.
1, the formation of basic model high-precision flow sensor
The formation of basic model flow sensor: every flow sensor only is made up of a rotor flow valve piece A and a detecting element B, and rotor flow valve A only uses single core rotor, movement can be any among Fig. 2, and promptly movement can be gear-engaged type, nibble and close any in rotator type or the cycloid rotor type.The output shaft of requirement rotor flow valve piece and the turning axle of photoelectric encoder do not have the gap and link to each other, and promptly connecting needs to guarantee run-in synchronism, to guarantee sufficiently high precision.
Measure the photocurrent quantity sensor that is made of this method sensitivity and measuring accuracy only depend on factors such as the constructive method of base components A and process and assemble precision, because the resolution of scrambler and measuring accuracy are far above the former.
On principle of compositionality and method, movement is the rotor mechanical of blade, impeller, the wheeled formation of monodentate, and its precision is lower than the photocurrent quantity sensor that the rotor flow valve of the rotor movement that is meshed by bidentate wheel engagement and cycloid constitutes.Because can not separate inlet and liquid outlet zone fully by the movement that blade, impeller or individual gears constitute, might cause a part of inlet high-pressure fluid straight-through outlet low-pressure fluid or outlet low-pressure fluid again by the phenomenon in band meeting high-pressure spray tagma, so, more suitable by the flow sensor that blade, impeller, the wheeled rotor mechanical of monodentate constitute in the low pressure place, have simple in structure and certain measuring accuracy, high cost performance is arranged.And by gear rotor engagement, cycloid rotor engagement can be separated inlet and liquid outlet zone the movement that constitutes fully to, engagement type rotor engagement, the photocurrent quantity sensor of Gou Chenging has advantages such as measuring accuracy height, repetition performance are good thus.Especially, the movement that is made of engagement type rotor machinery has superior isolation performance, and the photocurrent quantity sensor of structure formation has the influence of load of not being subjected to and flow thus, and discharge opeing is clean, can constitute the high precision photoelectric flow sensor, can preferentially select for use in the high pressure place; Secondly preferentially select for use the external gear rotor engagement to structure, it has simple in structure and the high advantage of measuring accuracy; And in the low pressure place, also can select movement for use is blade, impeller or individual gears structural flow quantity sensor.
2, the formation of extended pattern high-precision flow sensor
The formation of extended pattern flow sensor: every flow sensor only is made up of a rotor flow valve A and a detecting element B, and rotor flow valve A only uses " multicore coaxial rotor flow valve " as indicated above, but movement can be any of Fig. 2, and promptly movement can be gear-engaged type, nibble and close any in rotator type or the cycloid rotor type.The output shaft of requirement rotor flow valve piece and the turning axle of photoelectric encoder do not have the gap and link to each other, and promptly connecting needs to guarantee run-in synchronism, to guarantee sufficiently high precision.
This extended pattern flow sensor can be applicable in multipath hydraulic synchro system or the multichannel liquid matching system, and synchronous valve or liquid proportioning valve and flow sensor are organically combined together, has reduced element, has saved cost.
3, the formation of redundancy-type flow sensor
The formation of redundancy-type flow sensor: every flow sensor only is made up of a rotor flow valve A and two detecting element B, and two detecting element B are coaxial respectively in the two ends of valve seat outrigger shaft; The movement kind and the chamber quantity of rotor flow valve piece are unrestricted, it can be any structure in the preamble, be that movement can be gear-engaged type, nibble and close any in rotator type or the cycloid rotor type that chamber can be a single cell structure, also can be the multi-cavity cell structure.The output shaft of requirement rotor flow valve piece and the turning axle of photoelectric encoder do not have the gap and link to each other, and promptly connecting needs to guarantee run-in synchronism, to guarantee sufficiently high precision.
This redundancy-type flow sensor can be used as the intelligent flow sensor and uses, a measuring sensor (B1) is used as work measurement, another measuring sensor (B2) is used as data monitoring, a flow sensor is exported 2 groups of data simultaneously, these data are compared, but whether judgment task measuring sensor (B1) work is normal, as note abnormalities, the data of then getting detecting element (B2) provide operation element B1 fault information simultaneously as operational data, point out maintenance; And signal Processing is finished by follow-up secondary instrument or computer, and this paper no longer is described in detail (other sensor as herein described in like manner).
4, the principle of duplex coupled mode flow sensor and formation
The structure that the present invention provides simultaneously a kind of " duplex coupling flow sensor ", so-called " duplex coupling flow sensor " is a kind of applied in any combination that hydraulic system has the pair of sensors of self detecting function that is specifically designed to.As general application, be to measure systematic parameters such as flow rate of hydraulic system, internal and outernal leakage, on the feed line in hydraulic system branch road loop and oil return pipeline, all load onto flow sensor G1, a G2; More flexible to the position that two flow sensors are installed, can be installed in simultaneously before or after the solenoid directional control valve, shown in Fig. 6 a, Fig. 6 b, the difference in two loops is: in Fig. 6 a, flow sensor is installed in after electromagnetism (electric liquid) reversal valve, before the double hydraulic control retaining valve; And in Fig. 6 b, flow sensor is installed in before electromagnetism (electric liquid) reversal valve.As the sensor element of online detection, whether operate as normal is extremely important for detecting element, otherwise testing result distortion or mistake, obviously, the flow sensor among Fig. 6 a or Fig. 6 b does not have self detecting function.Enough realize online self detecting function for making the sensor prodigiosin, now the flow sensor in the dot-dash frame among Fig. 6 a or Fig. 6 b is replaced to the flow sensor assembly in the dot-dash frame among Fig. 4 a or Fig. 4 b, retaining valve wherein adopts external mode, and remaining component integrates formation " duplex coupled mode flow sensor ".
As Fig. 4 a, duplex coupled mode flow sensor principle of work is such, flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and passed through solenoid valve C tieback before the rotor flow valve import and non-return retaining valve on the return line in the outlet of the rotor flow valve on the in-line, the function of this retaining valve is that the fluid string returns major loop and influences system's operate as normal when preventing that sensor from testing oneself, and also can guarantee the accuracy that sensor is tested oneself simultaneously.The system works principle of this manifold type flow sensor is: fluid series connection principle of equivalence, abbreviate liquid stream synchronous detection as, i.e. and flow sensor G1, G2 series connection, measured value should equate.Under normal circumstances, solenoid directional control valve C must not be electric, and the loop of P2-T2 is in strict closed condition, and flow sensor G1, G2 are in the state of working alone respectively; When whether just often needs detect flow sensor G1 or G2, the solenoid directional control valve A solenoid in the system circuit all not charged (referring to Fig. 6 b), spool is in meta; It is electric now to make solenoid directional control valve C coil get, and makes the conducting of P2-T2 loop, and hydraulic fluid flows back to fuel tank along interim loop P1-P2-C-T2-T1, and in the permissible error scope, if measured value G1=G2 is G1 ≠ G2, then sensor fault wherein in the unit interval.Usually, wherein whether the less flow sensor abnormal state of reading can check G1, G2 reading smoothly as the auxiliary judgment foundation simultaneously, and the rough flow sensor of Data Growth is unusual.
As Fig. 4 b, another kind of coupled mode flow sensor is such, flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and the outlet of the rotor flow valve on in-line is by solenoid valve C tieback fuel tank, simultaneously, be connected with the Coupling Control Unit of interlock between the two cover flow sensors, Coupling Control Unit and solenoid valve action are synchronously.The system works principle of such flow sensor is: the synchronous principle of equivalence of rotor axis mechanical, and abbreviate mechanical synchronization as and detect, promptly have ready conditions and force the scrambler rotating shaft of connection traffic sensor G1, G2, synchronize them running, measured value should equate.Its connected mode has two kinds, and Fig. 5 b is an Electromagnetic Drive gears parallel synchronous operation; Fig. 5 c is Electromagnetic Drive clutch coupling rotating shaft series connection synchronous operation.Under normal circumstances, solenoid directional control valve C must not be electric, and the P2-C-Y loop is in strict closed condition, and flow sensor G1, G2 are in the state of working alone respectively; When whether just often needs detect flow sensor G1 or G2, solenoid directional control valve A solenoid in the system circuit all not charged (referring to Fig. 6 b), spool is in meta, now make solenoid C (also being the electromagnetic switch valve coil) get, coupling of electromagnetic force driven wheel transmission shaft or the adhesive of driving electromagnetic clutch, make sensor G1, G2 measures rotating shaft and links to each other, drive the commutation of bi-bit bi-pass solenoid directional control valve simultaneously, make the conducting of P2-C-Y loop, hydraulic fluid is along interim loop P1-P2-C-Y oil sump tank, the direct driving sensor G1 of high-pressure fluid rotates, G2 synchronizedly runs with G1 under the coupling of electromagnetic clutch together simultaneously, in the inherent permissible error scope of unit interval, and measured value G1=G2, if G1 ≠ G2, then sensor fault wherein.Detection finishes, solenoid C dead electricity, and two-position two-way solenoid valve and coupling wheel are separated behind the logical inverse current of electromagnetic clutch by spring reset, and flow sensor G1, G2 are in the state of working alone again respectively.Under normal conditions, the above-mentioned measuring process duration is very short, and 1-10 can finish oneself's detection second.Usually, wherein the less flow sensor abnormal state of reading can be checked G1, G2 reading simultaneously whether smoothly as the auxiliary judgment foundation, and the rough flow sensor of Data Growth is unusual.The place that should be noted that is that the coil of solenoid directional control valve can be same coil with the coil that drives electromagnetic clutch or gear, solenoid directional control valve is special miniature reversal valve, through-flow aperture is less, is unlikely to influence the flow and the pressure of total system when connecting the loop off-load.
The structure of duplex coupled mode flow sensor is such: it is integrated on a rotor flow valve piece two cover sensors, and two cover flow sensors both can work alone, again can " synchronously " work together under the middle controller effect.This valve piece constitutes inside can be divided into I, II, three workspaces of III (also being three chambers), and the I district is sensor G1 workspace, and the II district is sensor G2 workspace, and I district and II district are relatively independent; The III district is the control zone, and both the association area of G1 and G2 started to control making to the working method of G1 and G2 and uses.And the built-in movement of the flow sensor in every district can be aforementioned any type of cassette mechanism structure, but two interconnected sensors need be selected the movement of same form for use.Respectively the structure of liquid stream synchronous detection principle and rotor axis mechanical synchronous detection principle is illustrated below.
Liquid stream synchronous detection formula structural representation is auspicious to be seen shown in Fig. 5 a, the I district is identical with preamble with II district structural texture, in the III district, set up an embedded micro solenoid directional control valve, solenoid directional control valve is by solenoid 9, spool 10 in valve piece cavity, spring 12, passage 11 on spool is formed, wherein the inlet 13 of reversal valve is opened on I district sidewall, reversal valve outlet 14 is left on II district sidewall, passage 11 on the spool is communicated with the outlet 14 of the inlet 13 of reversal valve and reversal valve respectively or blocks cooperation, be supported with spring 12 between the lower end of spool 10 and the valve piece cavity, the upper end of spool 10 has disposed solenoid 9, passage 11 diameters on the spool are generally got 1-6mm, preferentially choose 1-3mm, when solenoid was not charged, under the effect of spring force, spool was in upper, passage is in closed condition, the spring cavity of resorption has the leakage aperture, and the leak of liquid that leaks into the valve core spring chamber is gone out, and can work reliably to guarantee solenoid directional control valve.
Mechanical synchronization detects the formula structure and divides two kinds again, a kind ofly see Fig. 5 b, the I district is the high-pressure work district, the II district is the operating on low voltage district, the III district is the control zone, flow sensor G1 and G2 are coaxial with corresponding encoder and coupling wheel respectively, number in the figure 15 is a solenoid, flow sensor G1 and G2 respectively with corresponding encoder and coupling wheel 20,21 is coaxial, be that B1-C1 is coaxial, B2-C2 is coaxial, the coupling wheel 22 of Electromagnetic Control is as Coupling Control Unit, coupling wheel 22 respectively with two the cover detecting elements rotating shaft on gear 20,21 carry out clutch, coupling wheel 22 is connected on the connecting rod 17, connecting rod 17 is inserted into fixedly in the chute, connecting rod 17 lower ends are connected by spring 16 on the end cap of solenoid 15, simultaneously, have aperture 18 on connecting rod 17, respectively with unload circulation road 19 and be connected or block cooperation, and unload circulation road 19 1 ends and be communicated with in the outlet of the rotor flow valve in I district, unload circulation road 19 other ends to be communicated with opening at III district sidewall upper outlet, and the tieback fuel tank, unload circulation road 19 and generally get 1-6mm, preferentially choose 1-3mm, under normal circumstances, the relatively independent work of flow sensor G1 and G2, solenoid is not charged, it is the next that middle coupling wheel 22 is in by the effect of spring force, and three gears are in released state, simultaneously, unload aperture 18 dislocation on circulation road 19 and the connecting rod, aneroid stream passes through in the runner; When needs detect flow sensor G1 or G2, allow the solenoid directional control valve A in the system circuit be in meta (referring to Fig. 6 b), with seasonal solenoid 15 energisings, coupling wheel 22 motions also finally were of coupled connections in the middle of coil generation repulsion ordered about, simultaneously, spring 16 is stretched, unloading circulation road 19 this moment connects with the aperture 18 on the connecting rod 17, liquid stream flows to opposite side P2 from higher-pressure region G1 one side P1, the direct driving sensor G1 of high-pressure fluid rotates, drive G2 by gear drive and be synchronized with the movement, fluid flows back to fuel tank at last.Another kind is seen Fig. 5 c, flow sensor adopts embedded solenoid directional control valve in the III district, solenoid directional control valve is by solenoid 23, spool 24 in valve piece cavity, spring 25 is formed, wherein the inlet of reversal valve is by unloading circulation road 26 and being communicated with in the outlet of the rotor flow valve in I district, reversal valve outlet is communicated with opening at III district sidewall upper outlet by unloading circulation road 27, and tieback fuel tank, be supported with spring 25 between one end of spool 24 and the valve piece cavity 29, in III district valve piece cavity, be provided with electromagnetic clutch 28 as Coupling Control Unit, clutch is carried out in the rotating shaft of control rotor flow valve, the solenoid 23 of the coil double as solenoid directional control valve of electromagnetic clutch 28, unload circulation road 26,27 generally get 1-6mm, preferentially choose 1-3mm, and the driving of spool and clutch coupling is finished by solenoid; Label 26 is with label 27 and unloads the stream runner; When coil was not charged, under the effect of spring force, spool 24 was in left position, and spool 24 hides valve port fully, can not be identical between the runner, and aneroid stream flows in the runner, and this moment, flow sensor G1, G2 were in relatively independent separately duty.When needs detecting sensor G1 or G2, allow the solenoid directional control valve A in the system circuit be in meta (referring to Fig. 6 b), charged with seasonal coil 23, electromagnetic force drives clutch coupling 28 adhesives, valve core of the electromagnetic valve commutation simultaneously, the road is logical between the runner, and flow direction is P1-P2-6-7, flows back to fuel tank at last, liquid stream directly drives flow sensor G1 and rotates, by the coupling of electromagnetic clutch 28, flow sensor G2 synchronizedly runs with G1, carries out intelligent diagnostics by the data that detect scrambler; Detection finishes, and solenoid 23 dead electricity feed inverse current then, and electromagnetic force drives clutch separation 28, and sensor is all got back to normal operating conditions again; Afterwards, holding coil 23 continues the little electric current of conducting, is in released state reliably to guarantee clutch coupling 28.
Claims (9)
1, a kind of flow sensor, it includes rotor flow valve and detecting element, the spool of rotor flow valve is connected with the rotating shaft synchronised of detecting element by rotating shaft, the spool that it is characterized in that described rotor flow valve adopts gear-engaged type structure, cycloid rotor type engaging structure or engagement type rotor structure, thereby constitutes flow sensor;
Described detecting element adopts photoelectric encoder, magnetic coder or speed measuring motor;
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road inlet of each chamber, and all there is the independent liquid outlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor;
Or,
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road liquid outlet of each chamber, and all there is the independent inlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor.
2, flow sensor according to claim 1, the rotating shaft two ends that it is characterized in that described rotor flow valve spool extend out respectively with the rotating shaft synchronised of detecting element separately and are connected.
3, a kind of manifold type flow sensor, it is characterized in that flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and passed through the solenoid valve tieback before the rotor flow valve import and non-return retaining valve on the return line in the outlet of the rotor flow valve on the in-line;
Described flow sensor, it includes rotor flow valve and detecting element, the spool of rotor flow valve is connected with the rotating shaft synchronised of detecting element by rotating shaft, the spool that it is characterized in that described rotor flow valve adopts gear-engaged type structure, cycloid rotor type engaging structure or engagement type rotor structure, thereby constitutes flow sensor;
Described detecting element adopts photoelectric encoder, magnetic coder or speed measuring motor;
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road inlet of each chamber, and all there is the independent liquid outlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor;
Or,
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road liquid outlet of each chamber, and all there is the independent inlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor.
4, manifold type flow sensor according to claim 3, it is characterized in that described flow sensor is integrated in two cover rotor flow valves on the rotor flow valve piece, two cover flow sensors both can work alone, again can be under the effect of middle controller solenoid valve synchronous working together, it is I, II, three workspaces of III that this valve piece constitutes internal separation, the I district is sensor G1 workspace, and the II district is sensor G2 workspace, and I district and II district are relatively independent; The III district is the control zone, and promptly the association area of G1 and G2 starts to control making to the working method of G1 and G2 and uses.
5, manifold type flow sensor according to claim 4, it is characterized in that described flow sensor adopts embedded solenoid directional control valve in the III district, solenoid directional control valve is by solenoid, be arranged in the spool of valve piece cavity, spring, passage on spool is formed, wherein the inlet of reversal valve is opened on I district sidewall, the reversal valve outlet is left on II district sidewall, passage on the spool is communicated with the outlet of the inlet of reversal valve and reversal valve respectively or blocks cooperation, be supported with spring between the lower end of spool and the valve piece cavity, the upper end of spool has disposed solenoid, and the channel diameter on the spool is got 1-6mm.
6, a kind of manifold type flow sensor, it is characterized in that flow sensor is to be connected in couples on the in-line and return line of hydraulic system, and the outlet of the rotor flow valve on feed line is by solenoid valve tieback fuel tank, simultaneously, be connected with the Coupling Control Unit of interlock between the two cover flow sensors, Coupling Control Unit and solenoid valve action are synchronously;
Described flow sensor, it includes rotor flow valve and detecting element, the spool of rotor flow valve is connected with the rotating shaft synchronised of detecting element by rotating shaft, the spool that it is characterized in that described rotor flow valve adopts gear-engaged type structure, cycloid rotor type engaging structure or engagement type rotor structure, thereby constitutes flow sensor;
Described detecting element adopts photoelectric encoder, magnetic coder or speed measuring motor;
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road inlet of each chamber, and all there is the independent liquid outlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor;
Or,
Flow sensor is to being positioned in the relatively independent chamber separately with the engagement of many external gear wheels or engage-locked engagement rotor, shared one road liquid outlet of each chamber, and all there is the independent inlet of oneself in every chamber, a plurality of rotors are to a shared at least shared rotating shaft, all the other are non-shared rotating shaft, shared rotating shaft or non-shared rotating shaft slip or the roller bearings by separately is connected separately in the chamber, the axle envelope is set in the outrigger shaft inboard, and shared rotating shaft is connected by the rotating shaft of its sponson with photoelectric encoder, magnetic coder or speed measuring motor.
7, manifold type flow sensor according to claim 6, it is characterized in that described flow sensor is integrated in two cover rotor flow valves on the rotor flow valve piece, two cover flow sensors both can work alone, again can be under the Coupling Control Unit effect synchronous working together, it is I, II, three workspaces of III that this valve piece constitutes internal separation, the I district is sensor G1 workspace, and the II district is sensor G2 workspace, and I district and II district are relatively independent; The III district is the control zone, and promptly the association area of G1 and G2 starts to control making to the working method of G1 and G2 and uses.
8, manifold type flow sensor according to claim 7, it is characterized in that described flow sensor adopts embedded solenoid directional control valve in the III district, solenoid directional control valve is by solenoid, spool in valve piece cavity, spring is formed, wherein the inlet of reversal valve is by unloading circulation road and being communicated with in the outlet of the rotor flow valve in I district, reversal valve outlet is communicated with opening at III district sidewall upper outlet by unloading circulation road, and tieback fuel tank, be supported with spring between one end of spool and the valve piece cavity, in III district valve piece cavity, be provided with electromagnetic clutch as Coupling Control Unit, clutch is carried out in the rotating shaft of control rotor flow valve, the solenoid of the coil double as solenoid directional control valve of electromagnetic clutch unloads the circulation road diameter and gets 1-6mm.
9, manifold type flow sensor according to claim 8, it is characterized in that described flow sensor adopts the coupling wheel of Electromagnetic Control as Coupling Control Unit in the III district, coupling wheel respectively with two the cover detecting elements rotating shaft on gear carry out clutch, coupling wheel is connected on the connecting rod, connecting rod is inserted into fixedly in the chute, the connecting rod lower end is connected on the end cap of solenoid by spring, simultaneously, on connecting rod, have aperture, respectively with unload circulation road and be connected or block cooperation, and unload circulation road one end and be communicated with in the outlet of the rotor flow valve in I district, unloading the circulation road other end is communicated with opening at III district sidewall upper outlet, and the tieback fuel tank, unload the circulation road diameter and get 1-6mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100535844A CN100520309C (en) | 2006-09-26 | 2006-09-26 | Flow sensor and coupled type flow sensor |
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| CNB2006100535844A CN100520309C (en) | 2006-09-26 | 2006-09-26 | Flow sensor and coupled type flow sensor |
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| CN100520309C true CN100520309C (en) | 2009-07-29 |
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| CN103017830A (en) * | 2012-11-29 | 2013-04-03 | 安徽徽宁电器仪表集团有限公司 | Flow detecting instrument for hydraulic system |
| CN105737907A (en) * | 2014-12-30 | 2016-07-06 | 林肯工业公司 | Flow measuring device for lubrication system |
| CN107152424A (en) * | 2017-06-19 | 2017-09-12 | 中国水利水电科学研究院 | A kind of accurate lifting hydraulic control system and hinge movable dam |
| CN110726450B (en) * | 2018-07-17 | 2022-09-27 | 新智数字科技有限公司 | Counter for monitoring flow |
| CN113700687B (en) * | 2021-08-06 | 2024-06-04 | 中际联合（北京）科技股份有限公司 | Hydraulic amplitude changing system of crane and offshore crane |
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