CN101556136B - Method for monitoring wearing capacity of shaft housing of submerged roller - Google Patents

Abstract

The invention discloses a method for monitoring wearing capacity of a shaft housing of a submerged roller. By the method, a grate arranged above a coating boiler is provided with a displacement sensorfor detecting the horizontal position of some a point of band steel, then a signal is converted into a measured value D of the horizontal displacement value of a measured point of the band steel thro ugh a displacement changing and transmitting device, then the measured value D of the horizontal displacement value is transmitted to a computer system, and finally the computer system outputs the measured value D of the horizontal displacement value in real time and compares the measured value D of the horizontal displacement value with a set value in the computer system, the set value is a theoretical value y of the horizontal displacement value of the measured point of the band steel, the theoretical value corresponds to some a value of the wearing capacity A of the shaft housing, and when the horizontal displacement value D is not smaller than the y, the computer system make a corresponding response. The invention can accurate judge the wearing condition of the shaft housing of the submerged roller, and the operating staff obtain the wearing condition of the shaft housing of the submerged roller according to the response made by the computer, thereby reasonably arranging and using the submerged roller.

Description

The method of monitoring wearing capacity of shaft housing of submerged roller

Technical field

The present invention relates to a kind of monitoring method, specifically, is in the coating unit, is used for the method for monitoring wearing capacity of shaft housing of submerged roller.

Background technology

Referring to Fig. 1, Fig. 2, used sinking roller 3 equipment in the band steel 1 hot coating process, this sinking roller 3 is in below coating liquid 6 liquid levels, and band steel 1 enters coating pot 5 by furnace roller 2 through fire grate 4, shifts out coating pot 5 after sinking roller 3 guiding.As be with the steel hot galvanizing process to come to this, and sinking roller 3 is in below zinc liquid 6 liquid levels, and band steel 1 enters zinc pot 5 by furnace roller 2 through fire grate 4, shifts out zinc pot 5 after sinking roller 3 guiding.Referring to Fig. 3; two spindle noses of sinking roller 3 are provided with axle sleeve 8, and bearing shell 7 is housed on the armshaft, and axle sleeve 8 forms revolute pair in bearing shell 7; all be worn for 7 watts for fear of axle sleeve 8 and axle; on-the-spot adopt sacrificed axle sleeve 8 more, and the method for protection bearing shell 7 is when using the method; the wear extent of bearing shell 7 is very little; as the wear extent of ceramic bearing shell 7 commonly used, have only about 0.05mm, and the wear extent of axle sleeve 8 is generally greater than 2mm, so can disregard bearing shell 7 wear extenies.Sinking roller 3 is positioned at below coating liquid 6 liquid levels, and sinking roller 3 axle sleeves 8 are stressed big, and at high speed rotating, the serious wear of roller 3 axle sleeves 8 that cause sinking.

The degree of wear of axle sleeve is to judge whether the sinking roller needs the important evidence of changing.But because of the sinking roller is positioned at below the coating liquid liquid level, so at the scene, the wear extent of dip-roll sleeve can't be known, at present there is not effectively to judge the method for wearing capacity of shaft housing of submerged roller yet, the generally sound that rotates according to the sinking roller, the vibration of sink roll frame, or the unusual and fault of sinking roller is roughly judged the abrasion condition of axle sleeve.But concrete wear extent still fails to obtain all the time, consequently:

1, the roller that sinks sometimes is replaced under operate as normal; And using in continuation unusually appears in axle sleeve sometimes, finally causes the axle sleeve wearing and tearing to be broken, and causes the spindle nose fracture after perhaps the axle sleeve wearing and tearing are broken and the shutdown roll change.

2, can not monitor because of cause the sinking vibration of roller of axle sleeve serious wear, concrete preventive measure can not be arranged, to whether being to confirm by the strip quality defective that the roller that sinks causes to the generation unusual and fault of sinking roller.

Summary of the invention

The object of the present invention is to provide a kind of method of monitoring wearing capacity of shaft housing of submerged roller, can accurately judge the dip-roll sleeve abrasion condition by using this method, and reach certain value computer-chronograph system and can make corresponding reaction when wear extent, operating personnel learn the situation of dip-roll sleeve wearing and tearing according to this reaction, thereby rationally arrange and use the sinking roller.

The present invention is achieved in that a kind of method of monitoring wearing capacity of shaft housing of submerged roller, and the band steel enters the coating pot by furnace roller through fire grate, shifts out the coating pot behind the sinking roller guide, two bearing shells that spindle nose is provided with axle sleeve and matches with axle sleeve of sinking roller; The step of described monitoring wearing capacity of shaft housing of submerged roller is: the first step, a displacement transducer is installed on the fire grate above the coating pot, this displacement transducer detects the horizontal level at the band steel position concordant with its horizontal direction; Second step, in the displacement transducer rear end one shift transmission device is set, the band molten steel mean place signal that displacement transducer will record is transferred to the shift transmission device, and the shift transmission device becomes this conversion of signals the horizontal displacement measured value D of band steel institute measuring point; The 3rd the step, in shift transmission device rear end one computer system is set, the shift transmission device will be transferred to this computer system with the actual survey of the horizontal displacement D of steel institute measuring point; The 4th step, described computer system are exported this horizontal displacement measured value D in real time; Computer system compares this horizontal displacement measured value D with the setting value that is arranged in the computer system, this setting value is the pairing band steel of a certain value of the axle sleeve wear extent A measuring point horizontal displacement theoretical value y of institute, when D 〉=y, computer system is made corresponding reaction; Y=f (A) wherein, f (A) function is:

When sinking roller diameter during less than furnace roller:

$y=f\left(A\right)=k\frac{d\sqrt{h^2+d^2-{(R-r)}^2}+h(R-r)}{h\sqrt{h^2+d^2-{(R-r)}^2}+d(R-r)}$

$-(k-A)\frac{d\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+(h-A)(R-r)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+d(R-r)}---\left(1\right);$

When sinking roller diameter during greater than furnace roller:

$y=f\left(A\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="dk\; h"\; filenames="S2008100359269E00012.png,S2008100359269E00021.png"\; state="\{\{state\}\}">dk</figure-callout>}\sqrt{h^{}}\sqrt{{}^2+d^2-{(r-R)}^2}+(h^2+d^2-\mathrm{hk})(r-R)}{h\sqrt{h^2+d^2-{(r-R)}^2}+d(r-R)}$

$-\frac{d(k-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+({(h-A)}^2+d^2-(h-A)(k-A))(r-R)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+d(r-R)}---\left(2\right);$

In formula (1), the formula (2):

K: before the wearing and tearing dip-roll heart to the vertical range of displacement transducer,

H: before the wearing and tearing dip-roll heart to the vertical range in furnace roller axle center,

D: before the wearing and tearing dip-roll heart to the horizontal range in furnace roller axle center,

R: the furnace roller radius,

R: sinking roller radius.

Further, described axle sleeve wear extent A is as its value A=A _qThe time, this moment y=Y _q=f (A _q), as D 〉=Y _qThe reaction that the computer-chronograph system makes is a danger alarm signal; A wherein _qWear extent when entering precarious position for sinking roller serious wear, Y _qBe axle sleeve wear extent A _qPairing band steel institute measuring point horizontal displacement theoretical value, D is band steel institute measuring point horizontal displacement measured value.

Further, described axle sleeve wear extent A is as its value A=A _pThe time, this moment y=Y _P=f (A _p), as D 〉=Y _PThe reaction that the computer-chronograph system makes is the roll change alerting signal; A wherein _pWear extent when needing roll change for the sinking roller, Y _pBe axle sleeve wear extent A _pPairing band steel institute measuring point horizontal displacement theoretical value, D is band steel institute measuring point horizontal displacement measured value, and A _p＞A _q

Further, wearing capacity of shaft housing of submerged roller A, A=f are calculated and exported to described computer system in real time ^-1(D), to understand sinking roller abrasion condition in more detail.

For making the fire grate sealing good, described displacement transducer is fixed by welding on the fire grate.

The present invention is by detecting on the band steel abrasion condition that certain any horizontal shift situation obtains dip-roll sleeve indirectly, and with this horizontal displacement measured value output, when reaching certain numerical value computer-chronograph system, this horizontal displacement measured value reacts, inform that operating personnel's roller that sinks has entered a certain wear stage, thereby provide strong foundation for whether needing to change the sinking roller, and according to reasonable arrangement of the order of severity of axle sleeve wear extent and use sinking roller, avoid changing in advance the sinking roller or break down after just be forced to change the sinking roller, make the unusual and fault of dip-roll sleeve drop to minimum.

Description of drawings

Fig. 1 is the side view of band steel in the coating process;

Fig. 2 is the front elevation of band steel in the coating process;

Fig. 3 is the enlarged drawing of dip-roll sleeve, bearing shell part;

The displacement diagram of Fig. 4 forward and backward band steel for dip-roll sleeve weares and teares;

The dimension model figure that Fig. 5 simplifies during roller greater than sinking for the furnace roller radius;

The dimension model figure that Fig. 6 simplifies during greater than furnace roller for sinking roller radius;

Fig. 7 is the logic diagram of the preferred embodiment for the present invention.

Among the figure: 1 band steel, 2 furnace rollers, 3 sinking rollers, 4 fire grates, 5 coating pots (zinc pot), 6 coating liquids (zinc liquid), 7 bearing shells, 8 axle sleeves, 9 displacement transducers.

Embodiment

The invention will be further described below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1, Fig. 2, among the present invention, band steel 1 enters zinc pot 5 by furnace roller 2 through fire grate 4, shifts out zinc pot 5 after sinking roller 3 guiding, the bearing shell 7 (referring to Fig. 3) that two spindle noses of sinking roller 3 are provided with axle sleeve 8 and match with axle sleeve 8.Sinking roller 3 is under the acting forces such as buoyancy of the pulling force of being with steel 1, zinc liquid 6, and axle sleeve 8 presses on the superincumbent bearing shell 7 with the direction that makes progress all the time.Referring to Fig. 3, Fig. 4, after axle sleeve 8 wearing and tearing, axle sleeve 8 radiuses have reduced A, the minimum point of the sinking roller 3 roll surfaces A that also risen.Again because sinking roller 3 moves in zinc liquid 6; the protection of the very thin zinc liquid 6 of one deck is arranged between sinking roller 3 roll surfaces and the band steel 1; so sinking roller 3 roll surfaces do not have wearing and tearing substantially; band steel 1 is close to sinking roller 3 roll surfaces; the A so the minimum point of band steel 1 has also risen; then the band steel 1 in the fire grate 4 will be offset certain angle; as the angle [alpha] among Fig. 4; then a bit in theory will the certain distance y (as Fig. 4) of displacement on the band steel 1 of sinking roller 3 axle center certain altitudes certain; if can determine the relation between this horizontal displacement theoretical value y on axle sleeve 8 wear extent A and the band steel 1; and the actual measurement obtain horizontal displacement D, just can obtain the situation of axle sleeve 8 wear extent A indirectly.The dimension model figure that Fig. 5 simplifies during greater than sinking roller 3 radiuses for furnace roller 2 radiuses, the dimension model figure that Fig. 6 simplifies during greater than furnace roller 2 radiuses for sinking roller 3 radiuses, according to analysis, the horizontal displacement theoretical value y of institute's measuring point is the actual value (roller that promptly sinks begin to be worn back x value) and initial value x of map parameter x on the band steel 1 ₀The absolute value of the difference between (value of x when the roller that promptly sinks does not wear and tear).So just obtain the relation between horizontal displacement theoretical value y and the axle sleeve wear extent A:

When sinking roller 3 diameters during less than furnace roller 2 diameters:

$y=|x-x_0|=f\left(A\right)=k\frac{d\sqrt{h^2+d^2-{(R-r)}^2}+h(R-r)}{h\sqrt{h^2+d^2-{(R-r)}^2}+d(R-r)}$

$-(k-A)\frac{d\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+(h-A)(R-r)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+d(R-r)}---\left(1\right)$

When sinking roller 3 diameters during greater than furnace roller 2 diameters:

$y=|x-x_0|=f\left(A\right)=\frac{\mathrm{<figure-callout\; id="2"\; label="dk\; h"\; filenames="S2008100359269E00012.png,S2008100359269E00021.png"\; state="\{\{state\}\}">dk</figure-callout>}\sqrt{h^{}}\sqrt{{}^2+d^2-{(r-R)}^2}+(h^2+d^2-\mathrm{hk})(r-R)}{h\sqrt{h^2+d^2-{(r-R)}^2}+d(r-R)}$

$-\frac{d(k-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+({(h-A)}^2+d^2-(h-A)(k-A))(r-R)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+d(r-R)}---\left(2\right)$

In formula (1), the formula (2):

K: the vertical range of displacement transducer 9 is arrived in roller 3 axle center of sinking before the wearing and tearing,

H: the vertical range in furnace roller 2 axle center is arrived in roller 3 axle center of sinking before the wearing and tearing,

D: the horizontal range in furnace roller 2 axle center is arrived in roller 3 axle center of sinking before the wearing and tearing,

R: furnace roller 2 radiuses,

R: sinking roller 3 radiuses.

By formula (1), formula (2),, just can learn the situation of axle sleeve 8 wearing and tearing of sinking roller 3 indirectly by measuring the situation of band steel 1 certain some horizontal shift in the fire grate 4.

Referring to Fig. 4, Fig. 7, the step of the preferred embodiment for the present invention is:

The first step, a displacement transducer 9 is installed on the fire grate above the zinc pot 54, this displacement transducer 9 is fixed by welding on the fire grate 4, to guarantee the sealing of fire grate 4.And this displacement transducer 9 is positioned at fire grate 4 slagging scorification place top, guarantees that like this displacement transducer 9 is not subjected to the influence of slagging scorification.This displacement transducer 9 detects the horizontal level at band steel 1 position concordant with its horizontal direction, when not wearing and tearing with sinking roller 3 axle sleeves 8 displacement transducer 9 over against the horizontal level at band steel 1 position be benchmark, in sinking after roller 3 begins to be worn, beginning detecting position displacement sensor 9 over against band steel 1 horizontal level;

Second step, in displacement transducer 9 rear ends one shift transmission device is set, displacement transducer 9 will be with steel 1 horizontal level signal to be transferred to the shift transmission device, and the shift transmission device becomes to be with steel 1 horizontal displacement measured value D with this conversion of signals;

The 3rd the step, in shift transmission device rear end one computer system is set, the shift transmission device will be with steel horizontal displacement measured value D to be transferred to this computer system;

The 4th step, described computer system are exported this horizontal displacement measured value D in real time, and the wear extent A that calculates and export the axle sleeve 8 of sinking roller 3 in real time, A=f ^-1(D); Y=f (A) wherein, f (A) function are by formula (1), and formula (2) is determined.

Described computer system has two setting value Y _q, Y _p, Y _qLess than Y _pY wherein _q=f (A _q), A _qAxle sleeve wear extent when entering precarious position for sinking roller 3 serious wear, Y _qBe axle sleeve wear extent A _qPairing band steel institute measuring point horizontal displacement theoretical value; Y _p=f (A _p), A _pAxle sleeve wear extent when needing roll change for sinking roller 3, Y _pBe axle sleeve wear extent A _pPairing band steel institute measuring point horizontal displacement theoretical value.

At first computer system is with horizontal displacement measured value D and setting value Y _qCompare, as horizontal displacement D 〉=Y _qThe time, computer system is made the signal of danger warning; Computer system is with this horizontal displacement measured value D and setting value Y afterwards _pCompare, as horizontal displacement D 〉=Y _pThe time, computer system is made the signal that roll change is reported to the police, and alert must roll change, otherwise sinking roller 3 will break down and abnormal conditions, cause product quality defect.

Embodiment:

D=4430.5mm, h=7843mm, R=400mm, r=315mm, k=1200mm is because furnace roller 2 radiuses are greater than sinking roller 3 radiuses, so the formula of choosing (1).In the use of sinking roller 3 axle sleeves 8, axle sleeve 8 wear extent A _qDuring for 4mm, need begin to carry out danger warning, axle sleeve 8 wear extent A _pDuring for 6mm, need carry out roll change and report to the police,, get Y respectively according to formula (1) _qBe 1.94mm, Y _pBe 2.91mm, and with Y _qAnd Y _qCalculated value is inserted in the computer system as setting value.The horizontal displacement D that records when displacement transducer 9 is during more than or equal to 1.94mm, and computer system is carried out danger warning, this computer-chronograph output sleeve 8 wear extent 4mm and band steel 1 horizontal displacement 1.94mm; The horizontal displacement D that records when displacement transducer 9 is during more than or equal to 2.91mm, and computer system is carried out roll change and reported to the police this computer-chronograph output sleeve 8 wear extent 6mm and band steel 1 horizontal displacement 2.91mm.In the use of sinking roller 3, can report to the police according to the danger warning of computer system and roll change and reasonably arrange production, avoid the generation of unusual and failure condition.Certainly the concrete parameter value of present embodiment can change according to actual conditions.

Same principle if furnace roller 2 radiuses during less than sinking roller 3 radiuses, select formula (2) to calculate relation between axle sleeve wear extent A and the horizontal displacement theoretical value y, is in time carried out danger warning or roll change warning.

The foregoing description has been chosen two as the setup parameter Y that differentiates usefulness just as a kind of preferred _q, Y _p, when specifically using, can only choose one of them setup parameter Y _p, Y like this _pCorresponding wear extent A _pCan represent the axle sleeve wear extent when above-mentioned sinking roller 3 needs roll change, the axle sleeve wear extent when roller 3 serious wear of also can representing to sink enter precarious position, the numerical value in the time of also can representing other axle sleeve wear extent certainly; Remove above-mentioned two setup parameter Y in addition _q, Y _pOutward, also can increase one or more other and differentiate the setup parameter of usefulness, more specifically to react the abrasion condition of sinking roller 3 axle sleeves.

In the foregoing description, the signal that danger warning that computing machine is made or roll change are reported to the police, also can otherwise replace, as being connected the light that can send various different colours with computing machine, during sinking roller 3 axle sleeve serious wear, computing machine makes orange light bright, when needing roll change, makes the red colored lamp light.Certainly the computing machine reaction of sending also can be other form, as long as computing machine is reacted, operating personnel is known sink this moment the abrasion condition of roller in a word, and so various reactions all fall into protection scope of the present invention.

Claims (5)

1. the method for a monitoring wearing capacity of shaft housing of submerged roller, the band steel enters the coating pot by furnace roller through fire grate, behind the sinking roller guide, shift out the coating pot, two bearing shells that spindle nose is provided with axle sleeve and matches with axle sleeve of sinking roller, it is characterized in that: the step of the method for described monitoring wearing capacity of shaft housing of submerged roller is:

The first step, a displacement transducer is installed on the fire grate above the coating pot, this displacement transducer detects the horizontal level at the band steel position concordant with its horizontal direction;

Second step, in the displacement transducer rear end one shift transmission device is set, the band molten steel mean place signal that displacement transducer will record is transferred to the shift transmission device, and the shift transmission device becomes this conversion of signals the horizontal displacement measured value D of band steel institute measuring point;

The 3rd the step, in shift transmission device rear end one computer system is set, the shift transmission device will be transferred to this computer system with the horizontal displacement measured value D of steel institute measuring point;

The 4th step, described computer system are exported this horizontal displacement measured value D in real time; Computer system compares this horizontal displacement measured value D with the setting value that is arranged in the computer system, this setting value is the pairing band steel of a certain value of the axle sleeve wear extent A measuring point horizontal displacement theoretical value y of institute, when D 〉=y, computer system is made corresponding reaction; Y=f (A) wherein, f (A) function is:

When sinking roller diameter during less than furnace roller:

$y=f\left(A\right)=k\frac{d\sqrt{h^2+d^2-{(R-r)}^2}+h(R-r)}{h\sqrt{h^2+d^2-{(R-r)}^2}+d(R-r)}$

$-(k-A)\frac{d\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+(h-A)(R-r)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(R-r)}^2}+d(R-r)}---\left(1\right);$

When sinking roller diameter during greater than furnace roller:

$y=f\left(A\right)=\frac{\mathrm{dk}\sqrt{h^2+d^2-{(r-R)}^2}+(h^2+d^2-\mathrm{hk})(r-R)}{h\sqrt{h^2+d^2-{(r-R)}^2}+d(r-R)}$

$-\frac{d(k-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+({(h-A)}^2+d^2-(h-A)(k-A))(r-R)}{(h-A)\sqrt{{(h-A)}^2+d^2-{(r-R)}^2}+d(r-R)}$

(2)；

In formula (1), the formula (2):

K: before the wearing and tearing dip-roll heart to the vertical range of displacement transducer,

H: before the wearing and tearing dip-roll heart to the vertical range in furnace roller axle center,

D: before the wearing and tearing dip-roll heart to the horizontal range in furnace roller axle center,

R: the furnace roller radius,

R: sinking roller radius.

2. the method for monitoring wearing capacity of shaft housing of submerged roller according to claim 1 is characterized in that: described axle sleeve wear extent A is as its value A=A _qThe time, this moment y=Y _q=f (A _q), as D 〉=Y _qThe reaction that the computer-chronograph system makes is a danger alarm signal; A wherein _qAxle sleeve wear extent when entering precarious position for sinking roller serious wear, Y _qBe axle sleeve wear extent A _qPairing band steel institute measuring point horizontal displacement theoretical value, D is band steel institute measuring point horizontal displacement measured value.

3. the method for monitoring wearing capacity of shaft housing of submerged roller according to claim 2 is characterized in that: described axle sleeve wear extent A is as its value A=A _pThe time, this moment y=Y _P=f (A _p), as D 〉=Y _PThe reaction that the computer-chronograph system makes is the roll change alerting signal; A wherein _pAxle sleeve wear extent when needing roll change for the sinking roller, Y _pBe axle sleeve wear extent A _pPairing band steel institute measuring point horizontal displacement theoretical value, D is band steel institute measuring point horizontal displacement measured value, and A _p＞A _q

4. the method for monitoring wearing capacity of shaft housing of submerged roller according to claim 1, it is characterized in that: wearing capacity of shaft housing of submerged roller A, A=f are calculated and exported to described computer system in real time ^-1(D).

5. the method for monitoring wearing capacity of shaft housing of submerged roller according to claim 1, it is characterized in that: described displacement transducer is fixed by welding on the fire grate.

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