CN116140082B - Control method for material distribution in centrifuge drum - Google Patents
Control method for material distribution in centrifuge drum Download PDFInfo
- Publication number
- CN116140082B CN116140082B CN202310417767.3A CN202310417767A CN116140082B CN 116140082 B CN116140082 B CN 116140082B CN 202310417767 A CN202310417767 A CN 202310417767A CN 116140082 B CN116140082 B CN 116140082B
- Authority
- CN
- China
- Prior art keywords
- distance
- evaluation parameter
- rotary drum
- control module
- central control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/06—Arrangement of distributors or collectors in centrifuges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to the technical field of centrifuge drums, in particular to a control method for material distribution in a centrifuge drum, which comprises the following steps: step S1, in a single period, judging whether the oscillation degree of the rotary drum accords with a standard according to a comparison result of the oscillation degree evaluation parameter of the rotary drum in the single period and a preset standard oscillation degree evaluation parameter; step S2, a central control module corrects a third weight coefficient in an oscillation degree evaluation parameter formula according to the feeding amount of the material distribution device and the rotating speed of the material distribution device, and when the oscillation degree of the rotary drum is judged to be inconsistent with the standard, the central control module draws a time-distance curve according to a plurality of detection moments of the distance between the side wall of the rotary drum and the inner wall of the shell in a single period and the distances between the side wall of the rotary drum and the inner wall of the shell, which are detected at the plurality of detection moments; the invention avoids the damage of the centrifugal machine structure by adjusting the feeding amount of the material distribution device and the rotating speed of the motor.
Description
Technical Field
The invention relates to the technical field of centrifuge drums, in particular to a control method for material distribution in a centrifuge drum.
Background
Centrifuges are machines that utilize centrifugal force to separate components of a liquid from solid particles or a mixture of liquid and liquid. Centrifuges are mainly used to separate solid particles from liquids in suspension or to separate two liquids of different densities and which are not mutually compatible in emulsion.
The centrifuge has a cylinder, called a bowl, which rotates at high speed about its own axis, usually driven by an electric motor. After the suspension or emulsion is added into the rotary drum, the suspension or emulsion is quickly driven to rotate at the same speed with the rotary drum, and the components are separated under the action of centrifugal force and are respectively discharged. In general, the higher the rotation speed of the drum, the better the separation effect.
The existing centrifugal machine has various feeding modes, but the aim is the same, namely materials are uniformly distributed in a rotary drum as much as possible, the materials are commonly used for middle feeding, the axis of a feeding pipe is coincident with the axis of the rotary drum, the top end of a rotary drum center transmission device is provided with a distributing disc with a certain taper, the materials flow onto the distributing disc, and the materials are scattered towards the periphery of the distributing disc under the action of gravity and then are scattered towards the periphery of the rotary drum.
The problem of vibration of the centrifugal machine is a key problem in the using process of the centrifugal machine, if the centrifugal machine is greatly damaged due to excessive vibration, the centrifugal machine structure can be damaged in severe cases, such as bearing damage, sealing failure, deformation of a bearing structure and the like, and even the main shaft is broken. Vibration of the centrifuge is mainly caused by uneven distribution of materials in the rotary drum.
Chinese patent publication No.: CN107309099a discloses a control method for distributing materials in a centrifuge drum, which comprises arranging an infrared material level detector above the center of the drum, and electrically connecting the infrared material level detector with a control device; dividing the wall of the rotary drum into at least four material distribution areas from top to bottom, respectively measuring the material thickness of each material distribution area after a certain material distribution stroke of a material distribution pipe from top to bottom or from bottom to top by an infrared material level detector, transmitting data to a control device, calculating the average value of the material thickness on the wall of the rotary drum by the control device, and calculating the percentage value of the material thickness of a single material distribution area and the average material thickness; if the thickness of the material layer in a certain material distribution area is 90% -95% of the average thickness, the passing time of the material distribution pipe in the material distribution area in the next material distribution stroke is prolonged by t seconds; if the thickness of the material layer in a certain material distribution area is less than 90% of the average thickness, the material distribution pipe is prolonged for t1 seconds in the material distribution area in the next material distribution stroke.
The prior art can not adjust the feeding amount and the rotating speed of the material distribution device and the angle of the material distribution device according to the oscillation condition of the rotary drum, so that the problems of damage, sealing failure, deformation of a bearing structure and the like of a centrifugal machine are caused.
Disclosure of Invention
Therefore, the invention provides a control method for distributing materials in a centrifuge drum, which is used for solving the problem that the structure of a centrifuge is damaged due to untimely adjustment of the feeding amount, the rotating speed and the angle of a distributing device in the prior art.
In order to achieve the above purpose, the control method of the cloth in the centrifuge drum of the present invention comprises:
step S1, in a single period, a central control module controls an infrared distance measuring device arranged on the inner wall of a shell of a centrifugal machine to detect the distances between the side wall of the rotary drum and the inner wall of the shell at a plurality of moments to obtain a rotary drum vibration degree evaluation parameter, and judges whether the vibration degree of the rotary drum accords with a standard according to a comparison result of the rotary drum vibration degree evaluation parameter and a preset standard vibration degree evaluation parameter;
step S2, when the central control module preliminarily judges that the vibration degree of the rotary drum does not accord with the standard, the central control module corrects a third weight coefficient in a rotary drum vibration degree evaluation parameter calculation formula according to the feeding amount of the material distribution device and the rotating speed of the material distribution device, calculates the actual value of the rotary drum vibration degree evaluation parameter according to the corrected third weight coefficient, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the actual value of the rotary drum vibration degree evaluation parameter;
And S3, when the vibration degree of the rotary drum is judged to be not in accordance with the standard, the central control module draws a time-distance curve according to a plurality of detection moments of the distance between the side wall of the rotary drum and the inner wall of the shell in a single period and the distances between the side wall of the rotary drum and the inner wall of the shell, which are detected at the plurality of detection moments, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve.
Further, in the step S1, the central control module calculates a distance fluctuation interval D according to distances between a plurality of drum side walls and an inner wall of the casing at a plurality of moments detected by the infrared ranging device, where a calculation formula of D is as follows: d=dmax-Dmin, where Dmax is the maximum value of the distance between the drum side wall and the inner wall of the shell in a single period, dmin is the minimum value of the distance between the drum side wall and the inner wall of the shell in a single period, and the central control module calculates the drum oscillation degree evaluation parameter S according to D, and setsWherein V is the rotation speed of the rotary drum, qa is the material quantity in the rotary drum, a is a first weight coefficient, b is a second weight coefficient, c is a third weight coefficient, and a=0.2m -1 ，b=0.3min/r，c=0.5g -1 The central control module determines whether the oscillation degree of the rotary drum accords with a standard judgment mode according to the evaluation parameter of the oscillation degree of the rotary drum, wherein,
The first judging mode is that the central control module judges that the oscillation degree of the rotary drum accords with a standard;
the second judging mode is that the central control module primarily judges that the vibration degree of the rotary drum does not accord with the standard, corrects the third weight coefficient according to the feeding amount of the material distribution device and the rotating speed of the material distribution motor, calculates the actual value S 'of the vibration degree evaluation parameter of the rotary drum, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the S';
and the third judging mode is that the central control module judges that the oscillation degree of the rotary drum does not accord with the standard, simultaneously draws a time-distance curve, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve.
Further, the first judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is smaller than or equal to the evaluation parameter of the vibration degree of a first preset standard;
the second judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of the first preset standard and smaller than or equal to the evaluation parameter of the vibration degree of the second preset standard;
the third judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of a second preset standard;
The first preset standard oscillation degree evaluation parameter is smaller than the second preset standard oscillation degree evaluation parameter.
Further, the central control module determines a correction mode of a third weight coefficient according to a comparison result of the feeding capacity evaluation parameter and a preset standard feeding capacity evaluation parameter under a first preset condition, wherein,
the first weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a first correction coefficient; the first weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is smaller than or equal to a first preset standard feeding capacity evaluation parameter;
the second weight coefficient correction mode is that the central control module corrects the third weight coefficient to the corresponding weight coefficient by using a second correction coefficient; the second weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than the first preset standard feeding capacity evaluation parameter and smaller than or equal to the second preset standard feeding capacity evaluation parameter;
the third weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a third correction coefficient; the third weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than a second preset standard feeding capacity evaluation parameter;
Wherein the first preset standard feeding capability evaluation parameter is smaller than the second preset standard feeding capability evaluation parameter;
the central control module recalculates the corrected drum vibration degree evaluation parameter, and marks the corrected drum vibration degree evaluation parameter as S ', and whether the vibration degree of the drum accords with the standard is secondarily judged according to the S';
the first preset condition is that the rotating drum vibration degree evaluation parameter S is larger than the first preset standard vibration degree evaluation parameter and smaller than or equal to the second preset standard vibration degree evaluation parameter.
Further, in a single period, calculating a feeding capacity evaluation parameter G according to the feeding quantity Qb of the material distributing device and the rotating speed W of the material distributing motor, wherein the calculation formula of G is as follows:
wherein, gamma is the feeding loss amount corresponding to the unit rotating speed of the distributing device.
Further, the central control module determines the adjustment mode of the feeding amount of the material distribution device according to the difference DeltaS 'between the corrected drum vibration degree evaluation parameter S' and the first preset standard vibration degree evaluation parameter S1 under the second preset condition, and sets DeltaS '=S' -S1,
the first feeding amount adjusting mode is that the central control module uses a first preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the first feeding amount; the first feeding amount adjusting mode meets the condition that DeltaS' is smaller than or equal to a first preset oscillation degree evaluation parameter difference value;
The second feeding amount adjusting mode is that the central control module uses a second preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the second feeding amount; the second feeding amount adjusting mode meets the conditions that DeltaS' is larger than the first preset oscillation degree evaluation parameter difference value and smaller than or equal to the second preset oscillation degree evaluation parameter difference value;
the third feeding amount adjusting mode is that the central control module uses a third preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device down to a third feeding amount; the third feeding amount adjusting mode meets the condition that DeltaS' is larger than a second preset oscillation degree evaluation parameter difference value;
the first preset oscillation degree evaluation parameter difference value is smaller than the second preset oscillation degree evaluation parameter difference value;
the second preset condition is that the drum vibration degree evaluation parameter S' is larger than the first preset standard vibration degree evaluation parameter S1.
Further, the central control module draws a time-distance curve under a third preset condition, calculates an average value d of the distances between the drum side walls and the inner wall of the shell according to the distances between the drum side walls and the inner wall of the shell, which are detected in a single period, determines an adjusting mode of the rotating speed of the cloth motor at a time node at the Dmin in the next period according to a difference value Deltad between d and Dmin, sets Deltad=d-Dmin,
The first rotating speed adjusting mode is that the central control module uses a first rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a first rotating speed value; the first rotation speed adjusting mode meets the condition that Deltad is smaller than or equal to a first preset distance difference value;
the second rotating speed adjusting mode is that the central control module uses a second rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a second rotating speed value; the second rotating speed adjusting mode meets the condition that Deltad is larger than the first preset distance difference value and smaller than or equal to the second preset distance difference value;
the third rotating speed adjusting mode is that the central control module uses a third rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a third rotating speed value; the third rotating speed adjusting mode meets the condition that Deltad is larger than a second preset distance difference value;
wherein the first preset distance difference is smaller than the second preset distance difference;
the third preset condition is that the drum vibration degree evaluation parameter S is larger than the second preset standard vibration degree evaluation parameter S2.
Further, the central control module determines the adjustment mode of the distance between the distributing device and the inner wall of the rotary drum according to the difference DeltaQb between the feeding quantity Qb of the distributing device and the minimum feeding quantity Qbmin, and sets DeltaQb=Qb-Qbmin, wherein,
The first distance adjusting mode is that the central control module uses a first distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a first distance value; the first distance adjustment mode meets the condition that DeltaQb is smaller than or equal to a first preset standard feeding amount difference value;
the second distance adjusting mode is that the central control module uses a second distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a second distance value; the second distance adjustment mode meets the conditions that delta Qb is larger than the first preset standard feeding amount difference value and smaller than or equal to the second preset standard feeding amount difference value;
the third distance adjusting mode is that the central control module uses a third distance adjusting coefficient to adjust the distance between the material distributing device and the inner wall of the rotary drum to a third distance value; the third distance adjusting mode meets the condition that DeltaQb is larger than a second preset standard feeding amount difference value;
the first preset standard feeding amount difference value is smaller than the second preset standard feeding amount difference value.
Further, the central control module determines the adjustment mode of the distance between the distributing device and the inner wall of the rotary drum according to the difference DeltaW between the adjusted rotating speed Wa of the distributing motor and the preset maximum rotating speed value Wmax, wherein DeltaW=Wmax-Wa is set,
The fourth distance adjusting mode is that the central control module uses a fourth distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a fourth distance value; the fourth distance adjusting mode meets the condition that DeltaW is smaller than or equal to a first preset standard rotating speed difference value;
the fifth distance adjusting mode is that the central control module uses a fifth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a fifth distance value; the fifth distance adjusting mode meets the condition that DeltaW is larger than the first preset standard rotating speed difference value and smaller than or equal to the second preset standard rotating speed difference value;
the sixth distance adjusting mode is that the central control module uses a sixth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a sixth distance value; the sixth distance adjusting mode meets the condition that DeltaW is larger than a second preset standard rotating speed difference value;
the first preset standard rotating speed difference value is smaller than the second preset standard rotating speed difference value.
Further, when the central control module adjusts the distance L between the distributing device and the inner wall of the rotary drum, the included angle θ between the distributing device and the vertical direction satisfies a corresponding relationship, namely:
L/tanθ≥0.8×H
wherein H is the height of the inner wall of the rotary drum.
Compared with the prior art, the invention has the beneficial effects that the infrared distance measuring device is arranged on the inner wall of the shell of the centrifugal machine, the distance change between the side wall of the rotary drum and the inner wall of the shell is detected, and the vibration degree evaluation parameter of the rotary drum in the period is obtained, so that whether the vibration degree of the rotary drum accords with the standard is primarily judged, the whole condition of the centrifugal machine is effectively judged, and the damage to the structure of the centrifugal machine caused by untimely judgment is avoided; meanwhile, when the vibration degree of the rotary drum is judged to be inconsistent with the standard, the vibration degree of the rotary drum is consistent with the standard by adjusting the feeding amount of the material distribution device and the rotating speed of the material distribution motor, and the normal operation of equipment is effectively ensured by adjusting each parameter of the material distribution device to perform material laying for each corresponding time node in the next period, so that the delay process caused by equipment damage due to untimely adjustment is avoided.
Further, the infrared distance measuring device is arranged on the inner wall of the shell of the centrifugal machine, the distance change between the side wall of the rotary drum and the inner wall of the shell is detected, and the vibration degree evaluation parameter of the rotary drum in the period is obtained, so that whether the vibration degree of the rotary drum accords with the standard is judged, the whole condition of the centrifugal machine is effectively judged, and the damage to the structure of the centrifugal machine caused by untimely judgment is avoided.
Further, the method and the device for evaluating the vibration degree of the rotary drum based on the centrifugal machine start from actual conditions, and the coefficient of the material quantity in the rotary drum in the evaluation parameter of the vibration degree of the rotary drum is corrected according to the feeding quantity of the material distributing device and the rotating speed of the material distributing motor, so that the evaluated parameter of the vibration degree is closer to a true value, the vibration condition of the rotary drum is further judged more reasonably, and the phenomenon that the centrifugal machine structure is damaged due to untimely discovery is effectively avoided, so that the separation or sedimentation process is influenced.
Further, after the rotating drum vibration degree evaluation parameter is corrected, the corrected vibration degree evaluation parameter is compared with each preset standard vibration degree evaluation parameter, and when the corrected vibration degree evaluation parameter is larger than the first preset standard vibration degree evaluation parameter, the feeding amount of the material distribution device is reduced to a corresponding value according to the difference value, so that the situation that the vibration condition is more severe due to continuous increase of the feeding amount is effectively avoided, and equipment is damaged.
Further, when the vibration degree of the rotary drum is judged to be inconsistent with the standard, a curve is drawn, the average distance between the side wall of the rotary drum and the inner wall of the shell in the period is obtained, the rotating speed of the material distribution motor is adjusted to a corresponding value according to the difference value between the average distance and the minimum value between the side wall of the rotary drum and the inner wall of the shell, and the rotating speed of the material distribution device is adjusted to enable the rotation of the centrifugal machine to be stable, so that the phenomenon that the centrifugal machine structure is damaged due to the fact that the rotating speed is too fast, the centrifugal is not thorough due to the fact that the rotating speed is too slow is effectively avoided, and the centrifugal efficiency is affected.
Further, the invention effectively ensures that the centrifugal machine can not vibrate due to unstable operation of the centrifugal machine caused by too much material quantity in the rotary drum because the material distribution device is too close to the rotary drum by calculating the difference value between the material distribution device and the minimum material distribution quantity and adjusting the distance between the material distribution device and the inner wall of the rotary drum according to the difference value, thereby further ensuring the service life of the centrifugal machine.
Further, the distance between the material distributing device and the inner wall of the rotary drum is adjusted to a corresponding value according to the difference value by calculating the difference value between the rotating speed of the material distributing motor after adjustment and the preset maximum rotating speed, the distance between the material distributing device and the inner wall of the rotary drum is adjusted according to the rotating speed of the material distributing device, the material quantity in the rotary drum is effectively ensured to be in a reasonable range, and the phenomenon that the material in the rotary drum does not reach the standard due to the fact that the rotating speed is too high and the distance between the material distributing device and the inner wall of the rotary drum is far is avoided, so that the centrifugal efficiency is affected is avoided.
Drawings
FIG. 1 is a flow chart of a method for controlling the distribution of material in a centrifuge bowl according to an embodiment of the present invention;
FIG. 2 is a flowchart of determining whether the oscillation degree of the drum meets the standard according to the evaluation parameter of the oscillation degree of the drum according to the embodiment of the invention;
FIG. 3 is a flowchart of a modification method for determining a third weight coefficient according to a feeding capability evaluation parameter according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a centrifuge device in a method for controlling distribution in a centrifuge bowl according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a flowchart of a method for controlling material distribution in a centrifuge bowl according to an embodiment of the present invention is shown, where the method for controlling material distribution in a centrifuge bowl includes:
step S1, in a single period, a central control module controls an infrared distance measuring device arranged on the inner wall of a shell of a centrifugal machine to detect the distances between the side wall of the rotary drum and the inner wall of the shell at a plurality of moments to obtain a rotary drum vibration degree evaluation parameter, and judges whether the vibration degree of the rotary drum accords with a standard according to a comparison result of the rotary drum vibration degree evaluation parameter and a preset standard vibration degree evaluation parameter;
step S2, when the central control module preliminarily judges that the vibration degree of the rotary drum does not accord with the standard, the central control module corrects a third weight coefficient in a rotary drum vibration degree evaluation parameter calculation formula according to the feeding amount of the material distribution device and the rotating speed of the material distribution device, calculates the actual value of the rotary drum vibration degree evaluation parameter according to the corrected third weight coefficient, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the actual value of the rotary drum vibration degree evaluation parameter;
and S3, when the vibration degree of the rotary drum is judged to be not in accordance with the standard, the central control module draws a time-distance curve according to a plurality of detection moments of the distance between the side wall of the rotary drum and the inner wall of the shell in a single period and the distances between the side wall of the rotary drum and the inner wall of the shell, which are detected at the plurality of detection moments, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve.
Referring to fig. 2, a flowchart of determining whether the oscillation degree of the drum meets the standard according to the evaluation parameter of the oscillation degree of the drum according to the embodiment of the present invention is shown, in the step S1, the center control moduleThe block calculates a distance fluctuation interval D according to the distances between a plurality of drum side walls and the inner wall of the shell at a plurality of moments detected by the infrared distance measuring device, wherein the calculation formula of D is as follows: d=dmax-Dmin, where Dmax is the maximum value of the distance between the drum side wall and the inner wall of the shell in a single period, dmin is the minimum value of the distance between the drum side wall and the inner wall of the shell in a single period, and the central control module calculates the drum oscillation degree evaluation parameter S according to D, and setsWherein V is the rotation speed of the rotary drum, qa is the material quantity in the rotary drum, a is a first weight coefficient, b is a second weight coefficient, c is a third weight coefficient, and a=0.2m -1 ，b=0.3min/r，c=0.5g -1 The central control module determines whether the oscillation degree of the rotary drum accords with a standard judgment mode according to the evaluation parameter of the oscillation degree of the rotary drum, wherein,
the first judging mode is that the central control module judges that the oscillation degree of the rotary drum accords with a standard;
the second judging mode is that the central control module primarily judges that the vibration degree of the rotary drum does not accord with the standard, corrects the third weight coefficient according to the feeding amount of the material distribution device and the rotating speed of the material distribution motor, calculates the actual value S 'of the vibration degree evaluation parameter of the rotary drum, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the S';
And the third judging mode is that the central control module judges that the oscillation degree of the rotary drum does not accord with the standard, simultaneously draws a time-distance curve, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve.
Specifically, the first judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is smaller than or equal to the evaluation parameter of the vibration degree of a first preset standard;
the second judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of the first preset standard and smaller than or equal to the evaluation parameter of the vibration degree of the second preset standard;
the third judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of a second preset standard;
the first preset standard oscillation degree evaluation parameter is smaller than the second preset standard oscillation degree evaluation parameter.
According to the invention, the infrared distance measuring device is arranged on the inner wall of the shell of the centrifugal machine, the distance change between the side wall of the rotary drum and the inner wall of the shell is detected, and the vibration degree evaluation parameter of the rotary drum in the period is obtained, so that whether the vibration degree of the rotary drum accords with the standard is judged, the whole condition of the centrifugal machine is effectively judged, and the damage to the structure of the centrifugal machine caused by untimely judgment is avoided.
Fig. 3 is a flowchart showing a method for determining a third weight coefficient according to a feeding capability evaluation parameter according to an embodiment of the present invention, wherein the central control module determines the third weight coefficient according to a comparison result between the feeding capability evaluation parameter and a plurality of preset standard feeding capability evaluation parameters under a first preset condition, wherein,
the first weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a first correction coefficient; the first weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is smaller than or equal to a first preset standard feeding capacity evaluation parameter;
the second weight coefficient correction mode is that the central control module corrects the third weight coefficient to the corresponding weight coefficient by using a second correction coefficient; the second weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than the first preset standard feeding capacity evaluation parameter and smaller than or equal to the second preset standard feeding capacity evaluation parameter;
the third weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a third correction coefficient; the third weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than a second preset standard feeding capacity evaluation parameter;
Wherein the first preset standard feeding capability evaluation parameter is smaller than the second preset standard feeding capability evaluation parameter;
the central control module recalculates the corrected drum vibration degree evaluation parameter, and marks the corrected drum vibration degree evaluation parameter as S ', and whether the vibration degree of the drum accords with the standard is secondarily judged according to the S';
the first preset condition is that the vibration degree evaluation parameter S of the rotary drum is larger than the first preset standard vibration degree evaluation parameter and smaller than or equal to the second preset standard vibration degree evaluation parameter.
Specifically, the central control module is provided with a first preset standard feeding capacity evaluation parameter G1, a second preset standard feeding capacity evaluation parameter G2, a first correction coefficient eta 1, a second correction coefficient eta 2 and a third correction coefficient eta 3, wherein G1 is more than G2,0 is more than G2, eta 1 is more than eta 2 is more than eta 3 and is less than 1,
if G is less than or equal to G1, the central control module corrects the third weight coefficient to a corresponding value by using eta 1;
if G1 is more than G and less than or equal to G2, the central control module corrects the third weight coefficient to a corresponding value by using eta 2;
if G is more than G2, the central control module corrects the third weight coefficient to a corresponding value by using eta 3;
the central control module marks the third weight coefficient corrected by using eta as c ', and sets c' =c×eta, wherein e=1, 2,3;
Corrected S '=a×d+b×v+c' ×qa.
Specifically, the feeding capacity evaluation parameter G is calculated according to the feeding amount Qb of the material distributing device and the rotating speed W of the material distributing motor in a single period, wherein the calculation formula of G is as follows:
wherein, gamma is the feeding loss amount corresponding to the unit rotating speed of the distributing device.
According to the invention, from the actual situation, the coefficient of the material quantity in the rotary drum in the vibration degree evaluation parameter of the rotary drum is corrected according to the feeding quantity of the material distribution device and the rotating speed of the material distribution motor, so that the obtained vibration degree evaluation parameter is closer to a true value, the vibration degree of the rotary drum is further judged more reasonably, and the phenomenon that the centrifugal machine structure is damaged due to untimely discovery is effectively avoided, so that the separation or sedimentation process is influenced.
Specifically, the central control module determines the adjustment mode of the feeding amount of the material distribution device according to the difference DeltaS 'between the corrected vibration degree evaluation parameter S' of the rotary drum and the first preset standard vibration degree evaluation parameter S1 under the second preset condition, and sets DeltaS '=S' -S1,
the first feeding amount adjusting mode is that the central control module uses a first preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the first feeding amount; the first feeding amount adjusting mode meets the condition that DeltaS' is smaller than or equal to a first preset oscillation degree evaluation parameter difference value;
The second feeding amount adjusting mode is that the central control module uses a second preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the second feeding amount; the second feeding amount adjusting mode meets the conditions that DeltaS' is larger than the first preset oscillation degree evaluation parameter difference value and smaller than or equal to the second preset oscillation degree evaluation parameter difference value;
the third feeding amount adjusting mode is that the central control module uses a third preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device down to a third feeding amount; the third feeding amount adjusting mode meets the condition that DeltaS' is larger than a second preset oscillation degree evaluation parameter difference value;
the first preset oscillation degree evaluation parameter difference value is smaller than the second preset oscillation degree evaluation parameter difference value;
the second preset condition is that the vibration degree evaluation parameter S' of the rotary drum is larger than the first preset standard vibration degree evaluation parameter S1.
Specifically, the central control module is provided with a first preset oscillation degree evaluation parameter difference DeltaS 1', a second preset oscillation degree evaluation parameter difference DeltaS 2', a first preset feeding amount adjustment coefficient alpha 1, a second preset feeding amount adjustment coefficient alpha 2 and a third preset feeding amount adjustment coefficient alpha 3, wherein DeltaS 1 '<DeltaS2', 0 < alpha 1 < alpha 2 < alpha 3 < 1,
If DeltaS 'is less than or equal to DeltaS 1', the central control module uses alpha 1 to reduce the feeding amount of the distributing device to a first feeding amount;
if DeltaS 1' <DeltaS ' < DeltaS 2', the central control module uses alpha 2 to reduce the feeding amount of the distributing device to a second feeding amount;
if DeltaS '> DeltaS1', the central control module uses alpha 3 to reduce the feeding amount of the material distribution device to a third feeding amount;
the central control module marks the feeding amount of the distributing device regulated by using the alpha i as Qb ', and sets Qb' =Q0×alpha i, wherein Q0 is the initial feeding amount of the distributing device, and i=1, 2 and 3.
According to the invention, after the vibration degree evaluation parameters of the rotary drum are corrected, the corrected vibration degree evaluation parameters are compared with the preset standard vibration degree evaluation parameters, and when the corrected vibration degree evaluation parameters are larger than the first preset standard vibration degree evaluation parameters, the feeding quantity of the material distribution device is reduced to the corresponding value according to the difference value, so that the situation that the vibration condition is more severe due to the continuous increase of the feeding quantity is effectively avoided, and equipment is damaged.
Specifically, the central control module draws a time-distance curve under a third preset condition, calculates an average value d of the distances between the drum side walls and the inner wall of the shell according to the distances between the drum side walls and the inner wall of the shell, which are detected in a single period, determines an adjustment mode of the rotating speed of the cloth motor at a time node at the Dmin in the next period according to a difference Deltad between d and Dmin, sets Deltad=d-Dmin,
The first rotating speed adjusting mode is that the central control module uses a first rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a first rotating speed value; the first rotation speed adjusting mode meets the condition that Deltad is smaller than or equal to a first preset distance difference value;
the second rotating speed adjusting mode is that the central control module uses a second rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a second rotating speed value; the second rotating speed adjusting mode meets the condition that Deltad is larger than the first preset distance difference value and smaller than or equal to the second preset distance difference value;
the third rotating speed adjusting mode is that the central control module uses a third rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a third rotating speed value; the third rotating speed adjusting mode meets the condition that Deltad is larger than a second preset distance difference value;
wherein the first preset distance difference is smaller than the second preset distance difference;
the third preset condition is that the evaluation parameter S of the vibration degree of the rotary drum is larger than the evaluation parameter S2 of the vibration degree of the second preset standard.
Specifically, the central control module is provided with a first preset distance difference delta D1, a second preset distance difference delta D2, a first rotation speed adjustment coefficient beta 1, a second rotation speed adjustment coefficient beta 2 and a third rotation speed adjustment coefficient beta 3, wherein delta D1 < [ delta ] D2,1 < beta 2 < beta 3 < 1.5,
If delta D is less than or equal to delta D1, the central control module uses beta 1 to adjust the rotating speed of the cloth motor to a first rotating speed value;
if DeltaD 1 < Deltadis less than or equal to DeltaD 2, the central control module uses beta 2 to adjust the rotating speed of the cloth motor to a second rotating speed value;
if Deltad > DeltaD2, the central control module uses beta 3 to adjust the rotating speed of the cloth motor to a third rotating speed value;
the central control module records the rotating speed of the cloth motor regulated by using beta j as Wa, and sets Wa=W0×beta j, wherein W0 is the initial rotating speed of the cloth motor, and j=1, 2 and 3.
When the vibration degree of the rotary drum is judged to be inconsistent with the standard, a curve is drawn, the average distance between the side wall of the rotary drum and the inner wall of the shell in the period is obtained, the rotating speed of the distribution motor is adjusted to a corresponding value according to the difference value between the average distance and the minimum value between the side wall of the rotary drum and the inner wall of the shell, and the rotating speed of the distribution device is adjusted to enable the rotation of the centrifugal machine to be stable, so that the phenomenon that the centrifugal machine structure is damaged due to too high rotating speed, the phenomenon that the centrifugal machine is not thoroughly centrifuged due to too low rotating speed is effectively avoided, and the centrifugal efficiency is affected.
Specifically, the central control module determines the adjustment mode of the distance between the material distribution device and the inner wall of the rotary drum according to the difference DeltaQb between the material distribution device feeding quantity Qb and the minimum feeding quantity Qbmin, and sets DeltaQb=Qb-Qbmin, wherein,
The first distance adjusting mode is that the central control module uses a first distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a first distance value; the first distance adjustment mode meets the condition that DeltaQb is smaller than or equal to a first preset standard feeding amount difference value;
the second distance adjusting mode is that the central control module uses a second distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a second distance value; the second distance adjustment mode meets the conditions that delta Qb is larger than the first preset standard feeding amount difference value and smaller than or equal to the second preset standard feeding amount difference value;
the third distance adjusting mode is that the central control module uses a third distance adjusting coefficient to adjust the distance between the material distributing device and the inner wall of the rotary drum to a third distance value; the third distance adjusting mode meets the condition that DeltaQb is larger than a second preset standard feeding amount difference value;
the first preset standard feeding amount difference value is smaller than the second preset standard feeding amount difference value.
Specifically, the central control module is provided with a first preset standard feeding quantity difference DeltaQb 1, a second preset standard feeding quantity difference DeltaQb 2, a first distance adjustment coefficient Delta1, a second distance adjustment coefficient Delta2 and a third distance adjustment coefficient Delta3, wherein DeltaQb 1 < DeltaQb2, 1 < Delta1 < Delta2 < Delta3 < 1.4,
If delta Qb is less than or equal to delta Qb1, the central control module increases the distance between the distributing device and the inner wall of the rotary drum to a corresponding value by delta 1;
if delta Qb1 is less than or equal to delta Qb2, the central control module increases the distance between the distributing device and the inner wall of the rotary drum to a corresponding value by delta 2;
if delta Qb > -delta Qb2, the central control module increases the distance between the distributing device and the inner wall of the rotary drum to a corresponding value by delta 3;
the central control module marks the distance between the distributing device and the inner wall of the rotary drum after delta m adjustment as L ', and sets L' =L multiplied by delta m, wherein L is the initial distance between the distributing device and the inner wall of the rotary drum, and m=1, 2 and 3.
According to the invention, the difference value between the feeding amount of the material distribution device and the minimum feeding amount is calculated, and the distance between the material distribution device and the inner wall of the rotary drum is regulated according to the difference value, so that the situation that the centrifugal machine is not oscillated due to unstable running of the centrifugal machine caused by too much material amount in the rotary drum due to too close distance between the material distribution device and the rotary drum is effectively ensured, and the service life of the centrifugal machine is further ensured.
Specifically, the central control module determines the adjustment mode of the distance between the distributing device and the inner wall of the rotary drum according to the difference DeltaW between the adjusted rotating speed Wa of the distributing motor and a preset maximum rotating speed value Wmax, and sets DeltaW=Wmax-Wa,
The fourth distance adjusting mode is that the central control module uses a fourth distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a fourth distance value; the fourth distance adjusting mode meets the condition that DeltaW is smaller than or equal to a first preset standard rotating speed difference value;
the fifth distance adjusting mode is that the central control module uses a fifth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a fifth distance value; the fifth distance adjusting mode meets the condition that DeltaW is larger than the first preset standard rotating speed difference value and smaller than or equal to the second preset standard rotating speed difference value;
the sixth distance adjusting mode is that the central control module uses a sixth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a sixth distance value; the sixth distance adjusting mode meets the condition that DeltaW is larger than a second preset standard rotating speed difference value;
the first preset standard rotating speed difference value is smaller than the second preset standard rotating speed difference value.
Specifically, the central control module is provided with a first preset standard rotation speed difference DeltaW 1, a second preset standard rotation speed difference DeltaW 2, a fourth distance adjustment coefficient epsilon 4, a fifth distance adjustment coefficient epsilon 5 and a sixth distance adjustment coefficient epsilon 6, wherein DeltaW 1 < [ DeltaW 2 ], 0.3 < epsilon 4 < epsilon 5 < epsilon 6 < 0.9,
If DeltaW is less than or equal to DeltaW 1, the central control module uses epsilon 4 to adjust the distance between the distributing device and the inner wall of the rotary drum to a corresponding value;
if DeltaW 1 < DeltaWis less than or equal to DeltaW 2, the central control module uses epsilon 5 to adjust the distance between the distributing device and the inner wall of the rotary drum to a corresponding value;
if DeltaW > DeltaW2, the central control module uses epsilon 6 to adjust the distance between the distributing device and the inner wall of the rotary drum to a corresponding value;
and the central control module marks the distance between the distribution device and the inner wall of the rotary drum after epsilon n adjustment as L ', and sets L' = L multiplied by epsilon n, wherein n = 4,5 and 6.
According to the invention, the difference between the rotating speed of the regulated material distribution motor and the preset maximum rotating speed is calculated, the distance between the material distribution device and the inner wall of the rotary drum is regulated to a corresponding value according to the difference, and the distance between the material distribution device and the inner wall of the rotary drum is regulated according to the rotating speed of the material distribution device, so that the material quantity in the rotary drum is effectively ensured to be in a reasonable range, and the phenomenon that the material in the rotary drum does not reach the standard due to the fact that the rotating speed is too high and the distance between the material distribution device and the inner wall of the rotary drum is far is avoided, thereby influencing the centrifugal efficiency.
Specifically, when the central control module adjusts the distance L between the material distribution device and the inner wall of the rotary drum, the included angle theta between the material distribution device and the vertical direction meets a corresponding relation, namely:
L/tanθ≥0.8×H
Wherein H is the height of the inner wall of the rotary drum.
Fig. 4 is a schematic structural diagram of a centrifuge device in a method for controlling material distribution in a centrifuge bowl according to an embodiment of the present invention, wherein 1 is a centrifuge housing, 11 is an infrared distance measuring device, and 12 is a centrifuge bowl.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for controlling the distribution of material in a centrifuge bowl, comprising:
Step S1, in a single period, a central control module controls an infrared distance measuring device arranged on the inner wall of a shell of a centrifugal machine to detect the distances between the side wall of the rotary drum and the inner wall of the shell at a plurality of moments to obtain a rotary drum vibration degree evaluation parameter, and judges whether the vibration degree of the rotary drum accords with a standard according to a comparison result of the rotary drum vibration degree evaluation parameter and a preset standard vibration degree evaluation parameter;
step S2, when the central control module preliminarily judges that the vibration degree of the rotary drum does not accord with the standard, the central control module corrects a third weight coefficient in a rotary drum vibration degree evaluation parameter calculation formula according to the feeding amount of the material distribution device and the rotating speed of the material distribution device, calculates the actual value of the rotary drum vibration degree evaluation parameter according to the corrected third weight coefficient, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the actual value of the rotary drum vibration degree evaluation parameter;
step S3, when the vibration degree of the rotary drum is judged to be not in accordance with the standard, the central control module draws a time-distance curve according to a plurality of detection moments of the distance between the side wall of the rotary drum and the inner wall of the shell in a single period and the distances between the side wall of the rotary drum and the inner wall of the shell, which are detected at the plurality of detection moments, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve;
In the step S1, the central control module calculates a distance fluctuation interval D according to distances between a plurality of drum side walls and an inner wall of the casing at a plurality of moments detected by the infrared ranging device, where a calculation formula of D is as follows: d=dmax-Dmin, where Dmax is the maximum value of the distance between the drum side wall and the inner wall of the shell in a single period, dmin is the minimum value of the distance between the drum side wall and the inner wall of the shell in a single period, and the central control module evaluates the vibration degree of the drum according to DThe value parameter S is calculated and s=a×d+b×v+c×q is set a Wherein V is the rotation speed of the rotary drum, qa is the material quantity in the rotary drum, a is a first weight coefficient, b is a second weight coefficient, c is a third weight coefficient, and a=0.2m -1 ，b＝0.3min/r，c＝0.5g -1 The central control module determines whether the oscillation degree of the rotary drum accords with a standard judgment mode according to the evaluation parameter of the oscillation degree of the rotary drum, wherein,
the first judging mode is that the central control module judges that the oscillation degree of the rotary drum accords with a standard;
the second judging mode is that the central control module primarily judges that the vibration degree of the rotary drum does not accord with the standard, corrects the third weight coefficient according to the feeding amount of the material distribution device and the rotating speed of the material distribution motor, calculates the actual value S 'of the vibration degree evaluation parameter of the rotary drum, and secondarily judges whether the vibration degree of the rotary drum accords with the standard according to the S';
And the third judging mode is that the central control module judges that the oscillation degree of the rotary drum does not accord with the standard, simultaneously draws a time-distance curve, and adjusts the rotating speed of the cloth motor in each corresponding time node in the next period according to the curve.
2. The method for controlling distribution in a centrifuge bowl according to claim 1, wherein,
the first judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is smaller than or equal to the evaluation parameter of the vibration degree of a first preset standard;
the second judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of the first preset standard and smaller than or equal to the evaluation parameter of the vibration degree of the second preset standard;
the third judging mode meets the condition that the evaluation parameter of the vibration degree of the rotary drum is larger than the evaluation parameter of the vibration degree of a second preset standard;
the first preset standard oscillation degree evaluation parameter is smaller than the second preset standard oscillation degree evaluation parameter.
3. The method for controlling material distribution in a centrifuge bowl according to claim 2, wherein the central control module determines a correction mode of the third weight coefficient according to a comparison result of the feeding capacity evaluation parameter and a preset standard feeding capacity evaluation parameter under a first preset condition,
The first weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a first correction coefficient; the first weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is smaller than or equal to a first preset standard feeding capacity evaluation parameter;
the second weight coefficient correction mode is that the central control module corrects the third weight coefficient to the corresponding weight coefficient by using a second correction coefficient; the second weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than the first preset standard feeding capacity evaluation parameter and smaller than or equal to the second preset standard feeding capacity evaluation parameter;
the third weight coefficient correction mode is that the central control module corrects the third weight coefficient to a corresponding weight coefficient by using a third correction coefficient; the third weight coefficient correction mode meets the condition that the feeding capacity evaluation parameter is larger than a second preset standard feeding capacity evaluation parameter;
wherein the first preset standard feeding capability evaluation parameter is smaller than the second preset standard feeding capability evaluation parameter;
the central control module recalculates the corrected drum vibration degree evaluation parameter, and marks the corrected drum vibration degree evaluation parameter as S ', and whether the vibration degree of the drum accords with the standard is secondarily judged according to the S';
The first preset condition is that the rotating drum vibration degree evaluation parameter S is larger than the first preset standard vibration degree evaluation parameter and smaller than or equal to the second preset standard vibration degree evaluation parameter.
4. A control method of material distribution in a centrifuge bowl according to claim 3, wherein a feeding capacity evaluation parameter G is calculated according to a feeding amount Qb of the material distribution device and a rotation speed W of a material distribution motor in a single cycle, wherein a calculation formula of G is:
G＝Q b -W×γ
wherein, gamma is the feeding loss amount corresponding to the unit rotating speed of the distributing device.
5. The method according to claim 4, wherein the central control module determines a feeding amount adjustment mode of the feeding device according to a difference Δs 'between the corrected drum vibration degree evaluation parameter S' and the first preset standard vibration degree evaluation parameter S1 under a second preset condition, and sets Δs '=s' -S1,
the first feeding amount adjusting mode is that the central control module uses a first preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the first feeding amount; the first feeding amount adjusting mode meets the condition that delta S' is smaller than or equal to a first preset oscillation degree evaluation parameter difference value;
The second feeding amount adjusting mode is that the central control module uses a second preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device to be lower than the second feeding amount; the second feeding amount adjusting mode meets the condition that delta S' is larger than the first preset oscillation degree evaluation parameter difference value and smaller than or equal to the second preset oscillation degree evaluation parameter difference value;
the third feeding amount adjusting mode is that the central control module uses a third preset feeding amount adjusting coefficient to adjust the feeding amount of the material distribution device down to a third feeding amount; the third feeding amount adjusting mode meets the condition that delta S' is larger than a second preset oscillation degree evaluation parameter difference value;
the first preset oscillation degree evaluation parameter difference value is smaller than the second preset oscillation degree evaluation parameter difference value;
the second preset condition is that the drum vibration degree evaluation parameter S' is larger than the first preset standard vibration degree evaluation parameter S1.
6. The method according to claim 5, wherein the central control module draws a time-distance curve under a third preset condition, calculates an average value d of distances between the drum side walls and the inner wall of the housing according to the distances between the drum side walls and the inner wall of the housing detected in a single period, determines a rotation speed adjusting mode of the cloth motor at a time node at Dmin in a next period according to a difference value Δd between d and Dmin, and sets Δd=d-Dmin,
The first rotating speed adjusting mode is that the central control module uses a first rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a first rotating speed value; the first rotation speed adjusting mode meets the condition that Δd is smaller than or equal to a first preset distance difference value;
the second rotating speed adjusting mode is that the central control module uses a second rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a second rotating speed value; the second rotating speed adjusting mode meets the condition that Δd is larger than the first preset distance difference value and smaller than or equal to the second preset distance difference value;
the third rotating speed adjusting mode is that the central control module uses a third rotating speed adjusting coefficient to adjust the rotating speed of the cloth motor to a third rotating speed value; the third rotating speed adjusting mode meets the condition that Δd is larger than a second preset distance difference value;
wherein the first preset distance difference is smaller than the second preset distance difference;
the third preset condition is that the drum vibration degree evaluation parameter S is larger than the second preset standard vibration degree evaluation parameter S2.
7. The method according to claim 6, wherein the central control module determines a manner of adjusting a distance between the material distribution device and an inner wall of the bowl according to a difference Δqb between a material amount Qb of the material distribution device and a minimum material amount Qbmin, and sets Δqb=qb-Qbmin,
The first distance adjusting mode is that the central control module uses a first distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a first distance value; the first distance adjustment mode meets the requirement that delta Qb is smaller than or equal to a first preset standard feeding amount difference value;
the second distance adjusting mode is that the central control module uses a second distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a second distance value; the second distance adjustment mode meets the requirements that delta Qb is larger than the first preset standard feeding amount difference value and smaller than or equal to the second preset standard feeding amount difference value;
the third distance adjusting mode is that the central control module uses a third distance adjusting coefficient to adjust the distance between the material distributing device and the inner wall of the rotary drum to a third distance value; the third distance adjustment mode meets the condition that delta Qb is larger than a second preset standard feeding amount difference value;
the first preset standard feeding amount difference value is smaller than the second preset standard feeding amount difference value.
8. The method according to claim 7, wherein the central control module determines a manner of adjusting a distance between the material distributing device and an inner wall of the bowl according to a difference Δw between the adjusted rotational speed Wa of the material distributing motor and a preset maximum rotational speed Wmax, and sets Δw=wmax-Wa,
The fourth distance adjusting mode is that the central control module uses a fourth distance adjusting coefficient to adjust the distance between the material distribution device and the inner wall of the rotary drum to a fourth distance value; the fourth distance adjustment mode meets the condition that DeltaW is smaller than or equal to a first preset standard rotation speed difference value;
the fifth distance adjusting mode is that the central control module uses a fifth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a fifth distance value; the fifth distance adjusting mode meets the condition that DeltaW is larger than the first preset standard rotating speed difference value and smaller than or equal to the second preset standard rotating speed difference value;
the sixth distance adjusting mode is that the central control module uses a sixth distance adjusting coefficient to adjust the distance between the distributing device and the inner wall of the rotary drum to a sixth distance value; the sixth distance adjustment mode meets the condition that DeltaW is larger than a second preset standard rotation speed difference value;
the first preset standard rotating speed difference value is smaller than the second preset standard rotating speed difference value.
9. The method according to claim 8, wherein the central control module adjusts the distance L between the distributing device and the inner wall of the drum, and the included angle θ between the distributing device and the vertical direction satisfies a corresponding relationship, namely:
L/tanθ≥0.8×H
Wherein H is the height of the inner wall of the rotary drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310417767.3A CN116140082B (en) | 2023-04-19 | 2023-04-19 | Control method for material distribution in centrifuge drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310417767.3A CN116140082B (en) | 2023-04-19 | 2023-04-19 | Control method for material distribution in centrifuge drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116140082A CN116140082A (en) | 2023-05-23 |
| CN116140082B true CN116140082B (en) | 2023-08-08 |
Family
ID=86352820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310417767.3A Active CN116140082B (en) | 2023-04-19 | 2023-04-19 | Control method for material distribution in centrifuge drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116140082B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116351586B (en) * | 2023-06-02 | 2023-08-18 | 张家港市中南化工机械有限公司 | Horizontal spiral discharging filtering type centrifugal machine |
| CN116393266B (en) * | 2023-06-07 | 2023-08-25 | 张家港市中南化工机械有限公司 | Low-noise flat scraper lower part unloading automatic centrifugal machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203448197U (en) * | 2013-08-20 | 2014-02-26 | 成都西部石油装备有限公司 | Novel control system for centrifuge |
| WO2014174258A1 (en) * | 2013-04-24 | 2014-10-30 | National Oilwell Varco, L.P. | A centrifuge and a control system therefor |
| JP2016221444A (en) * | 2015-05-29 | 2016-12-28 | 日立工機株式会社 | Centrifuge |
| CN107309099A (en) * | 2017-07-20 | 2017-11-03 | 江苏华大离心机制造有限公司 | The control method of cloth in a kind of bowl |
| CN209189023U (en) * | 2018-12-03 | 2019-08-02 | 浙江三晟化工有限公司 | A kind of distributing device of centrifuge |
| CN110280399A (en) * | 2019-07-24 | 2019-09-27 | 江苏赛德力制药机械制造有限公司 | A kind of centrifuge that can control charging and control disengaging time |
| CN113062598A (en) * | 2021-03-19 | 2021-07-02 | 中联重科股份有限公司 | Device, system, method, medium and engineering machinery for controlling rotary vibration of arm support |
-
2023
- 2023-04-19 CN CN202310417767.3A patent/CN116140082B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014174258A1 (en) * | 2013-04-24 | 2014-10-30 | National Oilwell Varco, L.P. | A centrifuge and a control system therefor |
| CN203448197U (en) * | 2013-08-20 | 2014-02-26 | 成都西部石油装备有限公司 | Novel control system for centrifuge |
| JP2016221444A (en) * | 2015-05-29 | 2016-12-28 | 日立工機株式会社 | Centrifuge |
| CN107309099A (en) * | 2017-07-20 | 2017-11-03 | 江苏华大离心机制造有限公司 | The control method of cloth in a kind of bowl |
| CN209189023U (en) * | 2018-12-03 | 2019-08-02 | 浙江三晟化工有限公司 | A kind of distributing device of centrifuge |
| CN110280399A (en) * | 2019-07-24 | 2019-09-27 | 江苏赛德力制药机械制造有限公司 | A kind of centrifuge that can control charging and control disengaging time |
| CN113062598A (en) * | 2021-03-19 | 2021-07-02 | 中联重科股份有限公司 | Device, system, method, medium and engineering machinery for controlling rotary vibration of arm support |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116140082A (en) | 2023-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116140082B (en) | Control method for material distribution in centrifuge drum | |
| US5580003A (en) | Method for controlling a gyratory crusher | |
| US9084998B2 (en) | Method of controlling the operation of a cone crusher | |
| EP1655404B1 (en) | Washing machine comprising a balancing device | |
| US7850103B2 (en) | Assembly and method for restricting spinning in a gyratory crusher | |
| CN104245146A (en) | Centrifugal separator and method of controlling intermittent discharge | |
| US8292793B2 (en) | Control method of automatic balancing centrifuge using balancer | |
| CN115338044A (en) | Horizontal spiral discharge sedimentation centrifuge | |
| CN108722688A (en) | A kind of decanter centrifuge differential controlled system with self-regulation | |
| CN112708787B (en) | Mixing and stirring system based on lanthanum cerium rare earth processing production | |
| US4767258A (en) | Process and apparatus for charging a shaft furnace | |
| US3910509A (en) | Mill which operates at an overcritical speed of rotation | |
| CN115338042B (en) | Centrifugal device based on discharge centrifuge | |
| CN116393266B (en) | Low-noise flat scraper lower part unloading automatic centrifugal machine | |
| EP0610268B2 (en) | Method for controlling the material feed to a roller press for grinding particulate material | |
| CN113244841B (en) | Nutrient solution preparation system based on concentration detection regulation and control | |
| CN111795912B (en) | Ash content detection system and control method thereof | |
| KR100530081B1 (en) | A Method for Controlling the Supply of Sinter Cake for Furnace | |
| EP0521907B1 (en) | Method and apparatus for the manufacturing of a mineral fibre felt | |
| CN116493141B (en) | Closed upper discharging centrifugal machine | |
| CN212468291U (en) | Homogenization current stabilization system | |
| EP3421136A1 (en) | System and method for controlling separation of solid and liquid phases | |
| EP1010509A2 (en) | Slurry managing system and slurry managing method | |
| CN213739138U (en) | Automatic feeding device of glass kiln | |
| JPH08304212A (en) | Instrument and method for measuring unbalanced amount of wheel and method for correcting unbalanced amount |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |