CN107297282B - A kind of vibration protection method of centrifuge - Google Patents
A kind of vibration protection method of centrifuge Download PDFInfo
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- CN107297282B CN107297282B CN201710594130.6A CN201710594130A CN107297282B CN 107297282 B CN107297282 B CN 107297282B CN 201710594130 A CN201710594130 A CN 201710594130A CN 107297282 B CN107297282 B CN 107297282B
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- control device
- vibration
- main motor
- centrifuge
- vibration velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/02—Casings; Lids
- B04B7/06—Safety devices ; Regulating
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- Centrifugal Separators (AREA)
Abstract
The invention discloses a kind of vibration protection methods of centrifuge; including the vibration measurement sensor and warning device that electrically connect with control device are arranged on centrifuge shell; then control device carries out different controls to centrifuge main motor according to sensor measurement numerical value: 1) during entire charging and washing, de- liquid: if vibration velocity Fr < 25mm/s, centrifuge are run by setup program；2) in fill process, if vibration measurement sensor measures vibration velocity Fr >=25mm/s, charging is closed, 5-10Hz drops in the main motor running frequency that control device controls, alarm activation, into waiting for manual intervention state；3) in expecting full boosting velocity procedure: according to the vibration velocity of detection, controlling motor and feeding device in corresponding working condition, to reduce vibration, or carry out manual intervention；4) in washing, de- liquid, if vibration velocity Fr >=35mm/s, alarm activation, while would starting manual intervention mode.
Description
Technical field
The present invention relates to a kind of vibration protection methods of centrifuge.
Background technique
Generally comprise as shown in Figure 1, centrifuge normally starts operation: 1. rotary drum raising speeds to charging rate, 2. keep revolving speed
Charging, 3. raising speeds to de- liquid speed degree, 4. carry out de- liquid, washing, again de- liquid, 5. reductions of speed to scraper speed, 6. scrapers, 7. pulling bags
Process.
Centrifuge vibration problem is the critical issue in centrifuge use process, if vibration is excessive greatly centrifuge
Damage, will lead to centrifuge structure and is destroyed when serious, such as the problems such as bearing damage, seal failure, bearing structure deformation, even
Main shaft fracture.Vibration when centrifuge uses mainly because in rotary drum material branch it is uneven caused by.The vibration requirement of centrifuge
Control just needs to handle vibration problem, but existing method is usually in vibration velocity Fr < 25mm/s when more than this value
It is the limiting value more than a certain setting, directly shuts down, but this can makes the filter residue with filtrate in centrifuge fully enter sludge outlet,
Filter residue is caused all individually to handle again, it is very complicated, and also the filtrate having can cause components to cause corruption slag part out
Erosion.
Summary of the invention
The technical problems to be solved by the present invention are: velocity of rotation can be adjusted voluntarily to protect equipment, again by providing one kind
The vibration protection method that goes out slag part impact and greatly reduce maintenance manpower of the filtrate to centrifuge when avoiding shutting down.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows: a kind of vibration protection method of centrifuge,
Including the vibration measurement sensor and warning device that electrically connect with control device are arranged on centrifuge shell, then control device
Centrifuge main motor is carried out according to sensor measurement numerical value control as follows:
1) during entire charging and washing, de- liquid: if vibration measurement sensor measures vibration velocity Fr < 25mm/
S, centrifuge are run by setup program；
2) in fill process:
If vibration measurement sensor measures vibration velocity Fr >=25mm/s, charging is closed, control device controls main electricity
5-10Hz drops in machine running frequency, and control device controls alarm activation, into waiting for manual intervention state；
3) in expecting full boosting velocity procedure:
A: after expiring such as fruit, vibration measurement sensor measures vibration velocity Fr < 25mm/s under feed rotation, rises to specified
Revolving speed carries out by setup program；
Such as after material is full, vibration velocity Fr >=25mm/s is measured under feed rotation, then control device control main motor fortune
NHz drops in line frequency, and n value range is 5-10, and feed supplement t seconds, t value range 5-15, then control device control main motor was run
Frequency before frequency retrieval to feed supplement；
B: if measuring vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, centrifuge
It is run by setup program；
If measuring vibration velocity Fr >=25mm/s at this time, control device controls main motor running frequency and drops nHz, and n takes
Value range is 5-10, and feed supplement t seconds, t value range 5-15, then control device control main motor running frequency was restored to feed supplement
Frequency；
If vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, and centrifuge is by setting
Program is run；
If still measuring vibration velocity Fr >=25mm/s, control device controls main motor running frequency and drops nHz, n value
Range is 5-10, and feed supplement t seconds, t value range 5-15, then control device controlled frequency before main motor running frequency is restored to feed supplement
Rate；
C: it if after 3 feed supplements, vibration velocity Fr < 25mm/s, control device control main motor rises to rated speed, is centrifuged
Machine is run by setup program；
If still measuring vibration velocity Fr >=25mm/s after 3 feed supplements, then control device controls alarm activation,
Control device control main motor running frequency is down to 10-15Hz simultaneously, into waiting for manual intervention state；
4) in washing, de- liquid, if vibration velocity 25mm/s≤Fr < 35mm/s, control device controls main motor frequency
Rate reduces 8-12Hz operation, and control device controls alarm activation, into waiting for manual intervention state；
If vibration velocity Fr >=35mm/s, control device controls alarm activation, and control device controls main motor frequency
Rate is down to 10-15Hz operation, into waiting for manual intervention state.
As a preferred solution, the vibration measurement sensor is installed on the position in the middle part of case inside face rotatory drum wall
Set place.
The beneficial effects of the present invention are: this method corrects centrifuge automatically in material imbalance；And from
When scheming causes vibration to transfinite if there is the problems such as material leakage, low-speed centrifugal state can be kept, when waiting operator's free time before
It handles, to greatly reduce required maintenance manpower when centrifuge uses.
In fill process, if vibration measurement sensor measures vibration velocity Fr >=25mm/s, charging is closed, is controlled
5-10Hz drops in the main motor running frequency that device controls, and control device controls alarm activation, into waiting for manual intervention
State；The revolving speed of fill process centrifuge is originally relatively low, if still there is the situation that vibration is transfinited, illustrates rotary drum injustice
The situation that weighs is extremely serious, and carrying out manual intervention just can effectively solve problem.
Such as after material is full, vibration velocity Fr >=25mm/s is measured under feed rotation, then control device control main motor fortune
NHz drops in line frequency, and n value range is 5-10, and feed supplement t seconds, t value range 5-15, then control device control main motor was run
Frequency before frequency retrieval to feed supplement；Feed supplement can correct the situation of material branch unevenness on rotatory drum wall sometimes, to reduce centrifugation
The vibration of machine；
If measuring vibration velocity Fr >=25mm/s after a feed supplement, then again feed supplement to correcting material on rotatory drum wall
The situation of branch's unevenness, to reduce the vibration of centrifuge；Then detect vibration velocity, if still measure vibration velocity Fr >=
25mm/s, then feed supplement is again to correct the situation of material branch unevenness on rotatory drum wall, to reduce the vibration of centrifuge；
If still measuring vibration velocity Fr >=25mm/s after 3 feed supplements, illustrate that distribution device damage or rotary drum somewhere can
There can be material leakage (being caused by filter bag damage or other reasons), then control device controls alarm activation, while control device
Controlling main motor running frequency reduces 10-20Hz, keeps current state, feed liquid and material residue is avoided once to enter in tapping mechanism,
Carry out manual intervention, by rotary drum feed liquid and material residue be transferred in other container, avoid pollution material residue, be also convenient for disposition not
It is filtered dry material, saves human time；
In washing, de- liquid, if vibration velocity 25mm/s≤Fr < 35mm/s, control device controls main motor frequency
10Hz operation is reduced, apocarpy is kept, feed liquid and material residue is avoided once to enter in tapping mechanism, control device control alarm dress
Starting is set, into waiting for manual intervention state；
If vibration velocity Fr >=35mm/s, control device controls alarm activation, and control device controls main motor frequency
Rate is down to 15Hz operation, keeps apocarpy, feed liquid and material residue is avoided once to enter in tapping mechanism, artificial into waiting for
Intervention states, by rotary drum feed liquid and material residue be transferred in other container, avoid pollution material residue, be also convenient for disposition not being filtered dry
Material saves human time.
It is installed on due to vibration measurement sensor at the position in the middle part of case inside face rotatory drum wall, the accuracy of measurement is more
It is high.
Detailed description of the invention
Fig. 1 is the schematic diagram that centrifuge of the present invention normally starts operation.
Fig. 2 is the state of a control signal of centrifuge this method when vibration, which just occurs, for fill process transfinites.
Fig. 3 is that centrifuge operates normally state of a control signal after expecting that full boosting velocity procedure carries out the balance of feed supplement twice.
Fig. 4 is the state of a control signal of centrifuge vibration velocity Fr >=35mm/s during washing, de- liquid.
Specific embodiment
Specific embodiments of the present invention are described below in detail.
A kind of vibration protection method of centrifuge, including electrically connect with control device, peace is arranged on centrifuge shell
Loaded on the vibration measurement sensor and warning device at the position in the middle part of case inside face rotatory drum wall, then control device according to
Sensor measurement numerical value carries out centrifuge main motor control as follows:
1) during entire charging and washing, de- liquid: if vibration measurement sensor measures vibration velocity Fr < 25mm/
S, centrifuge are run by setup program；
2) in fill process:
If vibration measurement sensor measures vibration velocity Fr >=25mm/s, charging is closed, control device controls main electricity
10Hz drops in machine running frequency, and control device controls alarm activation, into waiting for manual intervention state；
3) in expecting full boosting velocity procedure:
A: after expiring such as fruit, vibration measurement sensor measures vibration velocity Fr < 25mm/s under feed rotation, rises to specified
Revolving speed carries out by setup program；
Such as after material is full, vibration velocity Fr >=25mm/s is measured under feed rotation, then control device control main motor fortune
10Hz drops in line frequency, and feed supplement t seconds, t value range 5-15, then control device control main motor running frequency was restored to feed supplement
Frequency；
B: if measuring vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, centrifuge
It is run by setup program；
If measuring vibration velocity Fr >=25mm/s at this time, control device controls main motor running frequency and drops 10Hz, mends
Material t seconds, t value range 5-15, frequency before then control device control main motor running frequency is restored to feed supplement；
If vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, and centrifuge is by setting
Program is run；
If still measuring vibration velocity Fr >=25mm/s, control device controls main motor running frequency and drops 10Hz, feed supplement t
Second, t value range 5-15, frequency before then control device control main motor running frequency is restored to feed supplement；
C: it if after 3 feed supplements, vibration velocity Fr < 25mm/s, control device control main motor rises to rated speed, is centrifuged
Machine is run by setup program；
If still measuring vibration velocity Fr >=25mm/s after 3 feed supplements, then control device controls alarm activation,
Control device control main motor running frequency is down to 15Hz simultaneously, into waiting for manual intervention state；
4) in washing, de- liquid, if vibration velocity 25mm/s≤Fr < 35mm/s, control device controls main motor frequency
Rate reduces 10Hz operation, and control device controls alarm activation, into waiting for manual intervention state；
If vibration velocity Fr >=35mm/s, control device controls alarm activation, and control device controls main motor frequency
Rate is down to 15Hz operation, into waiting for manual intervention state.
Feed supplement number also can be set as more, to be set as needed.But 3 feed supplements still vibrate it is excessive if, base
Originally it can be determined that as material leakage.
The principles and effects of the invention, and the implementation that part uses only is illustrated in the above embodiments
Example, and is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from wound of the present invention
Under the premise of making design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (2)
1. a kind of vibration protection method of centrifuge is surveyed including the vibration electrically connected with control device is arranged on centrifuge shell
Quantity sensor and warning device, then control device carries out centrifuge main motor according to sensor measurement numerical value control as follows:
1) during entire charging and washing, de- liquid: if vibration measurement sensor measures vibration velocity Fr < 25mm/s, from
Scheming is run by setup program；
2) in fill process:
If vibration measurement sensor measures vibration velocity Fr >=25mm/s, charging is closed, control device controls main motor fortune
5-10Hz drops in line frequency, and control device controls alarm activation, into waiting for manual intervention state；
3) in expecting full boosting velocity procedure:
A: after expiring such as fruit, vibration measurement sensor measures vibration velocity Fr < 25mm/s under feed rotation, rises to specified turn
Speed carries out by setup program；
Such as after material is full, vibration velocity Fr >=25mm/s is measured under feed rotation, then control device control main motor operation frequency
NHz drops in rate, and n value range is 5-10, and feed supplement t seconds, t value range 5-15, then control device controlled main motor running frequency
Restore to frequency before feed supplement；
B: if measuring vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, and centrifuge is by setting
Determine program to be run；
If measuring vibration velocity Fr >=25mm/s at this time, control device controls main motor running frequency and drops nHz, n value model
It encloses for 5-10, feed supplement t seconds, t value range 5-15, frequency before then control device control main motor running frequency is restored to feed supplement
Rate；
If vibration velocity Fr < 25mm/s at this time, control device control main motor rises to rated speed, and centrifuge is by setup program
It is run；
If still measuring vibration velocity Fr >=25mm/s, control device controls main motor running frequency and drops nHz, n value range
For 5-10, feed supplement t seconds, t value range 5-15, then control device controlled frequency before main motor running frequency is restored to feed supplement；
C: if after 3 feed supplements, vibration velocity Fr < 25mm/s, control device control main motor rises to rated speed, and centrifuge is pressed
Setting program is run；
If still measuring vibration velocity Fr >=25mm/s after 3 feed supplements, then control device controls alarm activation, simultaneously
Control device control main motor running frequency is down to 10-15Hz, into waiting for manual intervention state；
4) in washing, de- liquid, if vibration velocity 25mm/s≤Fr < 35mm/s, control device controls main motor frequency drop
Low 8-12Hz operation, control device control alarm activation, into waiting for manual intervention state；
If vibration velocity Fr >=35mm/s, control device controls alarm activation, and control device controls main motor frequency drop
It is run to 10-15Hz, into waiting for manual intervention state.
2. a kind of vibration protection method of centrifuge as described in claim 1, it is characterised in that: the vibration measurement sensor
It is installed at the position in the middle part of case inside face rotatory drum wall.
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| CN201710594130.6A CN107297282B (en) | 2017-07-20 | 2017-07-20 | A kind of vibration protection method of centrifuge |
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| CN201710594130.6A CN107297282B (en) | 2017-07-20 | 2017-07-20 | A kind of vibration protection method of centrifuge |
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| CN107297282A CN107297282A (en) | 2017-10-27 |
| CN107297282B true CN107297282B (en) | 2019-06-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115555138B (en) * | 2022-08-05 | 2024-05-03 | 安旭电气(苏州)有限公司 | Vibration prevention control system for horizontal decanter centrifuge |
| CN118371343B (en) * | 2024-06-24 | 2024-10-29 | 张家港市中南化工机械有限公司 | Damping centrifuge based on intelligent control |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4070290A (en) * | 1976-03-04 | 1978-01-24 | Bird Machine Company, Inc. | Centrifuge with torsional vibration sensing and signaling |
| US7693212B2 (en) * | 2005-10-10 | 2010-04-06 | General Electric Company | Methods and apparatus for frequency rectification |
| CN201454705U (en) * | 2009-06-15 | 2010-05-12 | 无锡市厚德自动化仪表有限公司 | Vibration protection device for centrifuge |
| CN103294044B (en) * | 2013-07-01 | 2015-07-08 | 南京工程学院 | Measuring and controlling method of vibrating mechanical high-vibration-strength performance measuring and controlling device based on LabVIEW |
| CN205015080U (en) * | 2015-06-30 | 2016-02-03 | 北京长城华瑞科技有限公司 | Intelligence vibration monitoring module |
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