CN100591845C - Paper making disc type paste mill grinding clearance on-line accurate measuring device - Google Patents
Paper making disc type paste mill grinding clearance on-line accurate measuring device Download PDFInfo
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- CN100591845C CN100591845C CN200710025618A CN200710025618A CN100591845C CN 100591845 C CN100591845 C CN 100591845C CN 200710025618 A CN200710025618 A CN 200710025618A CN 200710025618 A CN200710025618 A CN 200710025618A CN 100591845 C CN100591845 C CN 100591845C
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Abstract
The technology of the invention provides a novel technical principle, method and corresponding supporting device and installation and use technology (see figure 1 of the manual abstract) for on-line,dynamic, direct and precise measurement of refining spacing of a disc refiner in the refining procedure of the paper making industry. The technical proposal mainly lies in that two eddy current sensors (with same specification and functional principle, to obtain panel data) are symmetrically arranged in the surrounding area of an internal chock of a milling area; when the end of a probe sets backcertain distance into the crest top of a chock piece, the refining spacing of the disc refiner is measured on line, directly and precisely by the eddy electrical signal produced by the end of a dynamic measuring probe and the crest top of a rotational disc piece, meanwhile the data of the refining spacing is shown, and an auxiliary motor is further controlled and regulated to keep the refining spacing at a set spacing value, so as to solve the deficiency of unbalanced spacing brought by thick refining, flow, impurity content, abrasion, etc in current technical methods (see figure 2 of the manual abstract)of controlling the refining spacing by refining current or unit refining power, make sure the fiber refining spacing is stable and strictly realize different refining spacing and even refining quality for different pulp types and paper type technical factors. The technical invention includes new functions and methods of the eddy current sensors to measure the displacement of the rotational tooth disc shape plane.
Description
Technical field
The present invention relates to disc type paste mill disc (material is a cast steel) tooth-shape structure feature, grinding clearance requirement and its dynamic change Study on influencing factors, current vortex sensor is used in the principle and the feasibility of the new purposes of plane rotation fluted disc class non-cpntact measurement gap displacement, and the sound end reduction of area that current vortex sensor is installed on the fluted disc of plane advances effect and boundary effect.
The present invention finally is applied in direct, online, accurate measurement and the control of technology grinding clearance of paper industry beating equipment disc type paste mill, and existing relatively traditional method ratio is a kind of new method.
Background technology
The paper basic craft course is each plant fiber raw material to be dissociated by diverse ways be dispersed into slurry, its grinding (making beating) is organized into the fiber of certain form again, the process of last evenly distributed again composition page.Therefore, making beating papermaking is to produce one of most critical operation, directly has influence on quality of finished paper.Disc type paste mill moves advantages such as consumption is low, slurry kind of wide adaptability with the defibrination that has of its design feature decision again, adds the advantage that it is applicable to mechanical feedback and high consistency beating, uses extensivelyr than other refining equipment in paper.Different slurries, the control of paper kind technological requirement grinding clearance are different, are pulp fiber level fixed gap really.
Adopting both at home and abroad at present and setting main motor total current is unit slurry defibrination power (seeing accompanying drawing 1), or when shutting down when zero check, operation the displacement of control advance and retreat disk auxiliary motor as the ways and means of regulation and control abrasive disk space; But the actual factor affecting such as flow, concentration, foreign material and the running wearing and tearing of dish tooth own of being starched indirectly, generally are similar to observing and controlling again, certainly will cause clearance measurement inaccuracy and control underrange.The observing and controlling direct, accurate, real-time of real realization grinding clearance is significant to improving defibrination fiber quality and uniformity and defibrination safety etc.
Summary of the invention
By the refining process requirement, should have specific fluted disc fibre-grade grinding clearance with different pulp fiber kinds and different refining process conditions during the disc type paste mill operation, and can accurately measure, regulate and control.The present invention is directed to and generally adopting the main motor total current of setting both at home and abroad at present is unit slurry defibrination power; or the problem that exists in the ways and means of control advance and retreat disk auxiliary motor displacement as the regulation and control abrasive disk space when zero check, operation when shutting down; by adopting specific non-contact measurement displacement current vortex sensor to be installed on the mill chamber disc decided at the higher level but not officially announced; purpose provide a kind of real realization grinding clearance directly, accurately, the observing and controlling new method (seeing accompanying drawing 2) of real-time, can improve defibrination fiber quality and uniformity effectively.
For solving the prior art problem, realizing above-mentioned purpose, main contents comprise among the present invention:
1, the new purposes of current vortex sensor as non-contact measurement rotation status, profile of tooth in-plane displancement explored and proposed first in research; Correspondingly current vortex sensor has been selected in the dedicated calculation design, and has provided the output characteristics of sensor by test.
2, on to abrasive disc fluted disc structure and operation characteristic research basis, determined that current vortex sensor is installed on price fixing abrasive disc border area last week, and determined that symmetry installs 2 (seeing accompanying drawing 4).Being installed on the surrounding zone is to consider that 1. radially there is gradient in blade surface, and 2. in surrounding zone toothing distribute standard more, gap minimum (just in time be outlet that defibrination process pulp fiber leaves the mill district check on district), it is easy 3. to install.It is identical safely that symmetry is installed 2 its effects, is to consider to gather panel data to make measurement more accurate.
3, according to the factors such as current vortex field-effect, edge effect and tooth surface abrasion of current vortex sensor, test determine and proposed that the sound end reduction of area advances, peripheral perforate and size from the fluted disc periphery edge.
4, the signal of telecommunication that current vortex sensor obtains and scale conversion method between the grinding clearance numerical value have been proposed.This for ease of the grinding clearance data in real time show with regulate the scale conversion of control purpose comprised two kinds of situations and consider respectively after comprehensively provide: the one, abrasive disc normally moves and when being in continuous state of wear, the 2nd, when being in artificial startup or shutdown or operation advance dish, when moving back the plate-like attitude.
5, connect the connection problem of control and regulative mode with the domestic and international disc type paste mill grinding clearance letter of extensively adopting at present
According to the basic principle and the characteristic of current vortex sensor, the levitation gap size is used when searching with flaw detection and the horizontal slippage of magnetic levitation vehicle plane tooth bar for the displacement measurement of planar conductor, thickness, vibration, rotating speed, liquid level, crackle from the purposes of having studied at present report.Do not see purposes in the content 1 of the present invention (being used for rotating the inclined teeth in-plane displancement at a high speed measures) as yet.In order to realize purposes in 1, when at first disc type paste mill being used for the difference purposes on the disc tooth depth, the facewidth and groove width etc. study, drawn the distribution character (see accompanying drawing 3) of current vortex at dish tooth surface (on the flank of tooth, the groove face) according to current vortex loop and kelvin effect principle then: the following current vortex of bottom land is one to be the whole concentric circles (seeing dotted line in the accompanying drawing 3) in axle center with the coil axes; Denticle part current vortex is equally to be the axle center symmetry with the coil axes but to separate, the independent closed loop stream of the non-circle of each self-forming, marginal distortion.According to the dish toothing (facewidth 2.4～4.2mm, groove width 1.5～4.0mm and tooth depth 5.0～7.0mm), common various slurry grinding clearance scopes (0.3～2.0), the effective outer diameter D of current vortex annular domain (＞8.7mm), require transducer sensitivity and the range of linearity (＞3.5mm) etc. designing and calculating determined to suit, to cover the current vortex sensor that teeth groove replaces the effective coverage be SE Φ 11 (seeing accompanying drawing 5) to the current vortex annular domain, its range, sensitivity are respectively 5mm, 2V/mm and can meet the demands.
Because the current vortex sensor that the present invention determines is installed on the price fixing that material is a cast steel, consider price fixing edge (border) that 1. probe is not subjected to be installed produce the influence of current vortex field-effect, 2. running fluted disc surface wear, 3. be convenient to adopt the non-conductive material packing after the perforate around the probe on the price fixing, in order to realize purpose requirement in 3, determine that with test the sound end reduction of area advances 2mm, periphery is opened straight hole φ 28 * 10mm (seeing accompanying drawing 6) as calculated.Must have wear-resisting slurry district temperature more than 150 ℃, non-conductor, wear-resisting (ABRASION RESISTANCE is a little less than flank of tooth material cast steel), impact resistance, inexpensive and workability for the plugging material at the recessed straight hole in probe place place, select polytetrafluoroethylmaterial material (seeing accompanying drawing 7).
Install in the disc surrounding zone because of current vortex sensor, consider that current vortex is distributed in the influence (result of the test is seen accompanying drawing 8) of the flank of tooth and disc periphery edge.As seen from the figure, reference axis left side e value (probe radial outer side and dish outward flange distance are installed) is a negative loop; Reference axis right side e value is for just, for the fluted disc face is arranged: be followed successively by the V-e curve 1,2,3 of the sensor probe axial end and flank of tooth distance (a) 3.9,3.0,1.9mm from top to bottom, though when same e value V value difference (because of different a value output characteristics differences); But V value overall variation trend unanimity when the different e value, and e changes between 0～3mm slowly, the V value is constant during e＞3mm.The trend situation of V-e curve 4 curves is with the fluted disc face is arranged when being 3.0mm for anodontia card a.
By on can draw, sensor probe is installed the reliable distance of isolated edge in the dish surrounding zone irrelevant with flute profile; Also irrelevant with the sensor probe axial end and the flank of tooth apart from a; With geared surface still be that the plane does not have yet.In order to realize in 3 that purpose requires to require (seeing accompanying drawing 9) through testing can satisfy to measure when determining e＞3mm.
Final goal of the present invention is can online in the disc type paste mill running, direct, accurate measurement fixed, dynamic grinding clearance value between the Moving plate sheet, and can show numerical value in real time and be used for regulating the control grinding clearance.In order to realize purpose requirement in 4, the gap display instrument shows that scale conversion is defined as following algorithm.
To be in equal abrasive conditions wear extent substantially consistent for Moving plate and price fixing during because of normal defibrination, pops one's head in end face to Moving plate crest top land 2 times apart from increase so wearing and tearing cause the increase in dish gap should be; And between the dish during advance and retreat disk dynamic clearance be changed to the probe end face to Moving plate end face 1 times apart from variable value.So dynamic clearance value x scale on display instrument is transformed between fixed, Moving plate:
x
1＝a
0+(2|V|-|V
01|-|V
02|)×1000÷b
x
2＝a
0+(2|V|-|V
01|-|V
02|)÷2×1000÷b
X in the formula
1, x
1Dynamic clearance value between the dish when being respectively normal defibrination of disc type paste mill and advance and retreat disk (μ m); V be two current vortex sensor average output voltages promptly import display instrument average voltage (v); V
01, V
02Be respectively sensor 1,2 primary clearance a
0The time voltage value (v); B is the sensitivity (v/mm) of sensor, and the sensor that the present invention determines is 2v/mm.
Show specifically among the present invention that gap width programme-control algorithm flow is based on following situation: considering that state has following several in the disc type paste mill production process: returns to zero and obtains primary clearance in the gap before the interim start; start rotating operation; totally four kinds of states are shut down in the operation of forward and back dish.It is different with algorithm that the gap that four kinds of states are obtained changes approach, and corresponding algorithm is seen accompanying drawing 10 with the design of algorithm routine flow path switch.
The invention discloses the online device for accurately measuring of a kind of paper making disc type paste mill grinding clearance, comprise the price fixing sheet of disc type paste mill, on described price fixing sheet, be provided with the through hole of vertical and price fixing sheet, in through hole, be provided with current vortex sensor; Described sensor is installed on price fixing sheet border area last week, and between the probe radial outer side of described sensor and the price fixing sheet outward flange apart from e＞3mm.
The probe diameter of described current vortex sensor is Φ 11, and the range of linearity is 6mm, and sensitivity is 2v/mm, sensitivity error≤± 3.0%, Hz-KHz be 0～5000 (3dB) Hz, the indicating value linearity≤± 2.0%F.S, operating voltage is-22～-26V (DC), operating current＜25mA.
Described through-hole diameter is Φ 28, and the probe tip face of described current vortex sensor and price fixing sheet flank of tooth distance are 2mm.
Be nested with the probe end socket that non-conducting material is made on the probe of described current vortex sensor; Described probe end socket external diameter is Φ 28, and the internal diameter that an end is provided with the probe that is used to place current vortex sensor is the counterbore of Φ 11, and described counterbore bottom thickness is 2.5mm.
Described probe end socket is the probe end socket that polytetrafluoroethylene (PTFE) is made.
The probe of described current vortex sensor is two, and is symmetrical arranged with the center of circle of price fixing sheet.
The invention also discloses the online accurate measurement control method of paper making disc type paste mill grinding clearance that the online device for accurately measuring of a kind of paper making disc type paste mill grinding clearance carries out, the dynamic clearance value of the normal defibrination of described disc type paste mill is x
1=a
0+ (2|V|-|V
01|-| V
02|) * 1000 ÷ b, the dynamic clearance value is x between the dish during advance and retreat disk
2=a
0+ (2|V|-|V
01|-| V
02|) ÷ 2 * 1000 ÷ b; X wherein
1, x
2Dynamic clearance value between the dish when being respectively normal defibrination of disc type paste mill and advance and retreat disk (μ m); V be two current vortex sensor average output voltages promptly import display instrument average voltage (v); V
01, V
02Be respectively the primary clearance a of two sensors (1), (2)
0The time voltage value (v); B is the sensitivity (v/mm) of sensor; When the normal defibrination of disc type paste mill, pass through control x
1Value control panel making beating dynamic clearance value; When the Moving plate sheet advance and retreat disk of disc type paste mill, by control x
2The dish of value control advance and retreat disk between the dynamic clearance value.
Description of drawings
The disc type paste mill grinding clearance letter that Fig. 1 extensively adopts both at home and abroad at present connects control and regulative mode
That Fig. 2 grinding clearance of the present invention adopts is direct, online, accurately measure and control method
The dish tooth surface current vortex distributional analysis schematic diagram that analysis draws at blade surface among Fig. 3 the present invention
Fig. 4 current vortex sensor is in installing zone bitmap on the price fixing (observed defibrination district card after being defibrination work)
The current vortex sensor outline drawing that Fig. 5 property of the present invention is directed to is determined
Fig. 6 current vortex sensor is installed probe indentation straight hole on price fixing, sensor is installed the screw thread hole pattern
Fig. 7 installs probe indentation straight hole polytetrafluoroethylene (PTFE) plug on every side
The current vortex sensor that Fig. 8 research process of the present invention draws is at the price fixing roll flute sheet swirl edge performance characteristic figure (between probe radial outside end face and abrasive disc edge apart from the graph of a relation between e and the sensor output voltage V) that powers on
The distance at probe separation disc sheet edge when Fig. 9 current vortex sensor is installed on price fixing
Four kinds of duty gaps of Figure 10 fiberizer algorithm routine flow path switch
When Figure 11 does not adopt current vortex sensor, on price fixing, adopt bolt plug figure in the probe installing hole
The bolt plug figure that adopts when Figure 12 need not pop one's head in
The probe installing hole of correspondence on Figure 13 price fixing shell
The probe map that Figure 14 price fixing shell (on the bonnet) is installed
Figure 15 dish gap dynamic monitoring display instrument function interface
The specific embodiment
1, the current vortex sensor probe determines and its performance parameter
(1) determine principle and foundation:
According to disc type paste mill dish toothing (the disc type paste mill roll flute characteristics of different slurries kind: the facewidth 2.4～4.2mm, groove width 1.5～4.0mm and tooth depth 5.0～7.0mm) computational analysis determine the effective outer diameter D of current vortex sensor current vortex annular domain should＞8.7mm; Common various slurry pulping is 0.3～2.0mm with the grinding clearance scope, considers factor requirement linear sensor scope＞3.5mm such as installation.Calculate complicatedly because of band flank of tooth current vortex distributes, carry out the dish tooth surface current vortex distributional analysis that theory analysis draws at the blade surface feature among the present invention and see accompanying drawing 3; Calculate at the kelvin effect principle reference plane conductor of conductive surface according to current vortex again and can get current vortex sensor and be created in blade surface current vortex annular domain outer diameter D=2r
3+ a=2 * 1.133837r
b+ 0.501189r
b=2.7688630r
b(a, r in the formula
3, a
1The radial diffusion width, center radius, external diameter that are respectively the current vortex annulus are radially to coil outer diameter r
bDistance; a
2Be coil outer diameter r
bRadially to current vortex internal radius distance).Determined that according to designing and calculating such as sensitivity suitable current vortex sensor is SE Φ 11 (seeing accompanying drawing 5) again.
(2) concrete parameter
Measurement category: defibrination dish gap≤5mm during operate as normal, abrasive disc end face run-out 0～2000 μ m;
Resolution ratio: dish gap 0.001mm, end face vibrates 1 μ m;
Linearity error: ± 10%;
2, the boring relevant with the current vortex sensor probe mounting
When the current vortex sensor probe is installed, mainly pass three parts of abrasive disc on shell, price fixing and the price fixing from the price fixing shell back side.Wherein the price fixing housing parts is for wearing unthreaded hole, and price fixing partly is screwed hole fixed installation current vortex sensor, and abrasive disc partly is extending bore around the probe on the price fixing.
(1) the probe installing hole of correspondence on the price fixing shell:
Bore diameter Φ 25 sees accompanying drawing 13.
(2) the probe installing hole (threaded) of correspondence on the price fixing
Coupling is installed with sensor threads in auger shell pit diameter M16 * 1, the long and price fixing consistency of thickness of screwed hole.
(3) extending bore around the abrasive disc probe
Extending bore is a unthreaded hole, diameter of phi 28, and Kong Changyu abrasive disc consistency of thickness, hole and abrasive disc Edge Distance are seen accompanying drawing 9.
The hole site must be consistent with hole on the abrasive disc on price fixing shell, the price fixing, and with perforate relative position on the abrasive disc (seeing accompanying drawing 9), be benchmark.Boring should be perpendicular to card.
3, current vortex sensor probe mounting
(1) probe mounting auxiliary equipment
For the current vortex sensor probe firmly is installed on the disc type paste mill, prevent from simultaneously to leak, (seeing accompanying drawing 5) is furnished with two stainless steel metal nuts 10 and nut 13, stainless steel metal pad 11 and teflon gasket 12 on the probe screw rod.Nut 10 is of a size of: internal thread M16 * 1, thick 7,6 length of sides 12.5 * 6; Nut 13 is of a size of: internal thread M16 * 1, thick 6, the length of side 11 * 6mm; Stainless steel metal pad 11 is of a size of: internal orifice dimension Φ 16+0.2, external diameter Φ 29, thick 5mm; Teflon gasket 12 is of a size of: internal orifice dimension Φ 16+0.2, external diameter Φ 21, thick 5mm.
(2) installation of the probe mounting degree of depth and auxiliary equipment
The screw portion 9 (seeing accompanying drawing 5) of will popping one's head in earlier during installation screws in price fixing after the price fixing shell pierces into shell aperture, when probe segment 14 top end faces stop precession during from abrasive disc flank of tooth 2mm, teflon gasket is inserted in the probe screw rod after the shell installing hole moves to price fixing, and then pushes down teflon gasket on price fixing with nut 13 precessions; The stainless steel metal pad is inserted in the probe screw rod and then pushes down the stainless steel metal pad on shell after moving to shell with nut 10 precessions; End socket (seeing accompanying drawing 7) the abrasive disc front of at last disc being popped one's head in is installed on the probe.
(3) wiring of current vortex sensor probe is connected with lead-in wire.
The wiring of probe is seen accompanying drawing 14 with going between to be connected, and goes between to the sensor fore-lying device and causes Displaying Meter and signals collecting control instrument again.
(4) probe mounting requirement
Probe is installed must be perpendicular to card, and probe end face and abrasive disc flank of tooth distance can be regulated once at set intervals, note sealing.
4, control is measured, shows and regulated to the running grinding clearance
Gap calculation process under (1) four kind of operating mode
State has following several in the disc type paste mill production process: returning to zero and obtain primary clearance in the gap before the interim start, starts rotating operation, and totally four kinds of states are shut down in the operation of forward and back dish.It is different with algorithm that the gap that four kinds of states are obtained changes approach, and corresponding algorithm is seen accompanying drawing 10 with the design of algorithm routine flow path switch.
(2) mainly the monitoring and display parameters
Monitoring in real time is mainly with display parameters for grinding clearance:
Moving plate that primary clearance-mill records when locating and the distance between price fixing;
Warning value of setting of alarming value-abrasive disk space;
Danger value of setting of dangerous values-abrasive disk space;
The time of presignal delay-delayed alarm when reaching warning or dangerous values;
Sensitivity-instrument measurement sensitivity;
The measured gap voltage of instrument when primary clearance voltage-mill is located;
Grinding clearance value (mm) under the real-time status, concrete scale conversion algorithm is seen above-mentioned " summary of the invention ".Monitoring that the present invention designs and develops and Displaying Meter surface chart are seen accompanying drawing 15.
5, connect control and regulate being connected of grinding clearance mode with the total current letter of extensively adopting at present both at home and abroad
(1) can two references or use separately on the parameter
An outstanding advantage of the present invention is or to use separately with the main motor total current control grinding clearance technical tie-up of the existing setting of employing both at home and abroad.When uniting when using, functional separation and Each performs its own functions: the former brings into play accurate measurement and regulates the grinding clearance effect, and the latter protects main motor generally and regulates the flow effect.Therefore, when existing disc type paste mill is transformed, be easy to be connected.
The bolt plug that adopts when (2) the current vortex sensor probe not being installed
As can not use the current vortex sensor probe because of reasons such as damages temporarily, available supporting bolt plug replaces probe positions, sees accompanying drawing 11.The size of bolt plug is seen accompanying drawing 12, and wherein bolt plug reach, bolt plug spiro rod length depend on abrasive disc, price fixing and the outer casing thickness of the disc type paste mill of being installed.
As shown in Figure 2, the utility model comprises the price fixing sheet 1 of disc type paste mill, is provided with the through hole 2 of vertical and price fixing sheet on described price fixing sheet, as Fig. 4, Fig. 6 and shown in Figure 9; Shown in Fig. 5,6,9, in through hole 2, be provided with current vortex sensor 3; The price fixing sheet is by 4 controls of dish position adjustments motor, and the Moving plate sheet is by disk-drive motor 5 controls, and disk-drive motor 5 other end signals flow to power of motor, current instruments; Be dish making beating dynamic clearance between price fixing sheet and the Moving plate sheet; Flow to for pulp fiber in the pipeline among Fig. 2; Feed pipe connects the measurement of concetration instrument, and discharge nozzle is connection traffic measuring instrument and low-voltage control switch respectively.
Dotted line circular arc 6 among Fig. 3 beyond the rectangle is the following whole circle current vortex of roll flute bottom land, and rectangle is the independent sealing current vortex of denticle portion with the axle center symmetry with interior solid line 7.
Fig. 4, through hole 2 are positioned at the surrounding zone of whole price fixing sheet 1, and between the probe radial outer side of described sensor and the price fixing sheet outward flange apart from e＞3mm.Between the probe radial outer side of sensor described in Fig. 9 and the price fixing sheet outward flange apart from e=14mm, the probe diameter of current vortex sensor is Φ 11, on the disc probe around perforate Φ 28 * 10.
For not adding the schematic diagram of bolt plug 8, among Figure 12 bolt plug 8 structural representations among Figure 11 with when probe.
Figure 13 is probe installing hole 9 schematic diagrames on the price fixing shell.
Claims (7)
1, the online device for accurately measuring of a kind of paper making disc type paste mill grinding clearance comprises it is characterized in that the price fixing sheet of disc type paste mill, is provided with the through hole of vertical and price fixing sheet on described price fixing sheet, is provided with current vortex sensor in through hole; Described sensor is installed on price fixing sheet border area last week, and between the probe radial outer side of described sensor and the price fixing sheet outward flange apart from e＞3mm.
2, the online device for accurately measuring of paper making disc type paste mill grinding clearance according to claim 1, it is characterized in that, the probe diameter of described current vortex sensor is Ф 11, the range of linearity is 6mm, and sensitivity is 2v/mm, sensitivity error≤± 3.0%, Hz-KHz is 0～5000 (3dB) Hz, the indicating value linearity≤± 2.0%F.S, operating voltage is-22～-26V (DC), operating current＜25mA.
3, the online device for accurately measuring of paper making disc type paste mill grinding clearance according to claim 2 is characterized in that, described through-hole diameter is Ф 28, and the probe tip face of described current vortex sensor and price fixing sheet flank of tooth distance are 2mm.
4, the online device for accurately measuring of paper making disc type paste mill grinding clearance according to claim 3 is characterized in that, is nested with the probe end socket that non-conducting material is made on the probe of described current vortex sensor; Described probe end socket external diameter is Ф 28, and the internal diameter that an end is provided with the probe that is used to place current vortex sensor is the counterbore of Ф 11, and described counterbore bottom thickness is 2.5mm.
5, the online device for accurately measuring of paper making disc type paste mill grinding clearance according to claim 4 is characterized in that, described probe end socket is the probe end socket that polytetrafluoroethylene (PTFE) is made.
6, the online device for accurately measuring of paper making disc type paste mill grinding clearance according to claim 5 is characterized in that, the probe of described current vortex sensor is two, and is symmetrical arranged with the center of circle of price fixing sheet.
7, the online accurate measurement control method of a kind of paper making disc type paste mill grinding clearance that adopts the online device for accurately measuring of the described paper making disc type paste mill grinding clearance of claim 6 to carry out is characterized in that the dynamic clearance value of the normal defibrination of disc type paste mill is x
1=a
0+ (2|V|-|V
01|-| V
02|) * 1000 ÷ b, the dynamic clearance value is x between the dish during advance and retreat disk
2=a
0+ (2|V|-|V
01|-| V
02|) ÷ 2 * 1000 ÷ b; X wherein
1, x
2Dynamic clearance value between the dish when being respectively normal defibrination of disc type paste mill and advance and retreat disk (μ m); V be two current vortex sensor average output voltages promptly import display instrument average voltage (v); V
01, V
02Be respectively the primary clearance a of two sensors (1), (2)
0The time voltage value (v); B is the sensitivity (v/mm) of sensor; When the normal defibrination of disc type paste mill, pass through control x
1Value control panel making beating dynamic clearance value; When the Moving plate sheet advance and retreat disk of disc type paste mill, by control x
2The dish of value control advance and retreat disk between the dynamic clearance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710025618A CN100591845C (en) | 2007-08-09 | 2007-08-09 | Paper making disc type paste mill grinding clearance on-line accurate measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710025618A CN100591845C (en) | 2007-08-09 | 2007-08-09 | Paper making disc type paste mill grinding clearance on-line accurate measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN101122102A CN101122102A (en) | 2008-02-13 |
| CN100591845C true CN100591845C (en) | 2010-02-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| BRPI1011867A2 (en) * | 2009-06-01 | 2017-10-24 | Fpinnovations | method for controlling wood pulp quality produced in a chip refiner, and apparatus configured to perform the method |
| CN103074798B (en) * | 2012-12-19 | 2015-04-22 | 华南理工大学 | Disc grinding machine with constant pulping strength and pulping method thereof |
| CN107476106B (en) * | 2017-09-06 | 2019-08-06 | 玖龙纸业（东莞）有限公司 | A kind of wood-fibred grinding method |
| CN111608973A (en) * | 2020-06-04 | 2020-09-01 | 晋中中意德电子液压有限公司 | High-concentration pulping mill control system and control method |
| CN116324083A (en) * | 2020-09-30 | 2023-06-23 | 福伊特专利有限公司 | Control of fibrous material handling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1619135A1 (en) * | 1988-07-18 | 1991-01-07 | Куйбышевский авиационный институт им.акад.С.П.Королева | Method of checking wear-out of revolving object |
| EP0640395A1 (en) * | 1993-08-25 | 1995-03-01 | Andritz Sprout-Bauer, Inc. | Plate position measuring system |
-
2007
- 2007-08-09 CN CN200710025618A patent/CN100591845C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1619135A1 (en) * | 1988-07-18 | 1991-01-07 | Куйбышевский авиационный институт им.акад.С.П.Королева | Method of checking wear-out of revolving object |
| EP0640395A1 (en) * | 1993-08-25 | 1995-03-01 | Andritz Sprout-Bauer, Inc. | Plate position measuring system |
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| CN101122102A (en) | 2008-02-13 |
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