CN115752287A - Method and measuring instrument for detecting and adjusting radial stress of rotary kiln riding wheel in operation - Google Patents
Method and measuring instrument for detecting and adjusting radial stress of rotary kiln riding wheel in operation Download PDFInfo
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- CN115752287A CN115752287A CN202211287650.XA CN202211287650A CN115752287A CN 115752287 A CN115752287 A CN 115752287A CN 202211287650 A CN202211287650 A CN 202211287650A CN 115752287 A CN115752287 A CN 115752287A
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Abstract
The invention discloses a method and a measuring instrument for detecting and adjusting the radial stress of riding wheels of a rotary kiln during operation, wherein a kiln ellipticity measuring instrument is arranged close to each wheel and is adsorbed at 3 equally-divided points on the circumference of a cylinder body, the measuring instrument measures the radial tiny ellipticity deformation curve data of the 3 points on the cylinder body in the process of one circle of rotation of the kiln, the radial relative stress proportion value of two riding wheels on the measured section of each gear is obtained by analyzing and comparing the oscillograms of 2 waves of the curve, and the advancing and retreating positions of each riding wheel are adjusted on the horizontal plane according to the radial relative stress proportion value, so that each riding wheel of each gear is basically and uniformly stressed in the radial direction. The invention has simple measurement operation, can be conveniently operated by common technicians of cement production companies, can quickly and reliably use the kiln ovality measuring instrument to complete the measurement and adjustment work of the riding wheels, can immediately analyze and obtain the radial relative stress measurement result of each retaining riding wheel of the kiln, and saves the measurement time and the cost.
Description
Technical Field
The invention belongs to the technical field of measuring and adjusting rotary kiln parameters in operation, and particularly relates to a method and a measuring instrument for detecting and adjusting radial stress of a rotary kiln riding wheel in operation.
Background
The rotary kiln is a key firing device in the production of cement, metallurgy, chemical industry, refractory materials and the like, and generally, the kiln is supported by more than three groups of riding wheels to continuously run. In long-term operation, the radial stress of each supporting wheel of the rotary kiln is uneven due to uneven settlement of a kiln base seat pier, uneven abrasion of the supporting wheel and a wheel belt, thermal deformation of each running part of a kiln body and the like, and even serious accidents of heating and tile burning of the supporting wheel bearing bush are caused. However, the direct detection of the radial stress of the riding wheel of the rotary kiln in operation is a difficult problem which is not solved in the world so far. Therefore, the existing solution in the world is to adjust the riding wheels by detecting the central line of the rotary kiln and the space geometric position of the riding wheels during operation, so as to hopefully achieve the purpose that each riding wheel for supporting the rotary kiln can uniformly bear the radial stress of the rotary kiln.
For example, the applicant discloses a method and an instrument for measuring the axis of a riding wheel and the axis of a cylinder of a dynamic rotary kiln in Chinese invention patent ZL 201210157545.4, wherein the measuring method comprises the following steps:
a rectangular coordinate system is established outside the rotary kiln, 2 shaft hole centering devices are arranged on two riding wheel shaft center taper holes on the same side, and a total station is used for directly measuring the space position parameters of the shaft center of each centering device and the origin of the coordinate system; and moving the shaft hole centering device and the total station to the other side of the two riding wheel shafts, and then directly measuring the spatial position parameters of the shaft centers of the two riding wheel shafts at the side. And then repeating the operation process at the rest of the retaining and supporting wheels in sequence, measuring the spatial position parameters of all the retaining and supporting wheels, automatically calculating the deviation of the actual axis of the kiln cylinder relative to the alignment axis according to a set program, and adjusting the kiln axis according to the deviation.
The existing rotary kiln measuring methods similar to the above methods in operation all have the following technical problems:
(1) The positions of the geometric space of the central line of the rotary kiln and the axes of the supporting wheels are normally arranged, the radial stress of the kiln body can be uniformly borne by each supporting wheel which is not equal to or more than +/-2.5mm even if the central line of the rotary kiln and the axes of the supporting wheels are detected by a professional measuring company, and therefore, the supporting stress condition of each supporting wheel has a plurality of influences and uncertainties.
(2) The method for measuring the spatial positions of the central line of the rotary kiln and the axial lines of the supporting wheels has more complex steps and operation, a rectangular coordinate system must be established to measure the spatial positions of the axial lines of the supporting wheels, and the horizontal distances di and di' from two reference vertical planes to each belt and the height difference of the bottoms of the belts are also measured to calculate the central line of each belt. Because the professional requirement on the measuring personnel is high, technicians of a cement production company cannot finish the measuring work by themselves, the measuring company needs to pay more than or equal to 10 ten thousand yuan RMB each time and requires the professional kiln measuring company to measure the RMB for 3-4 days, and the labor cost and the time cost for assisting in detection of the cement production company are high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for detecting and adjusting the radial stress of a rotary kiln riding wheel in operation and a kiln ovality measuring instrument aiming at the defects of the existing measuring method.
The measuring method and the measuring instrument are simple and easy for common technicians to operate on site, common technicians of a cement production company can operate the instrument conveniently, quickly, accurately and reliably, the measuring work can be completed, the measuring result of the radial relative stress of the supporting wheel of the rotary kiln and the measuring result of the ovality at the measuring point of the kiln cylinder can be obtained immediately, and high cost and other costs for detecting the central line of the kiln and the axis of the supporting wheel by a professional measuring company are saved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an ovality measuring instrument of a rotary kiln is characterized by comprising:
the adsorption type displacement detection device is detachably fixed on the surface of the cylinder of the rotary kiln, and an electric displacement sensor with a telescopic probe is arranged at the position closest to the radial direction of the cylinder, wherein the telescopic probe can linearly displace along the radial direction of the cylinder according to the deformation of the cylinder with a measuring point contacted with the telescopic probe;
a signal end of the electrical displacement sensor is arranged at one end of the telescopic probe in the radial direction, which is far away from the surface of the cylinder body, and a heat insulation device is arranged between the telescopic probe and the signal end of the electrical displacement sensor; the signal end of the electrical displacement sensor is arranged in the heat insulation box body and is respectively connected with the power supply device, the signal acquisition device and the wireless transmission device; the acquisition and wireless transmission device is in wireless communication with the mobile microcomputer processing system to send displacement data; the mobile microcomputer processing system is used for receiving the displacement data and providing radial micro-deformation curve data at the measuring point on the surface of the kiln cylinder body.
In the technical scheme, a beam support is arranged, an electric displacement sensor with a telescopic probe is arranged at the central line position of the beam support, and the telescopic probe extends out of a through hole at the central line position of the beam support and can generate linear displacement according to the deformation of a cylinder body of a measuring point contacted by the telescopic probe; the magnetic adsorption seat is rigidly arranged at the two ends of the beam support through the heat insulation device and the supporting device, the bottom of the magnetic adsorption seat is used for adsorbing the beam support on the surface of the cylinder, and the bottom surface of each magnetic adsorption seat is uniformly arranged with the radian of the surface of the cylinder.
Among the above-mentioned technical scheme, still set up temperature sensor and warning light, temperature sensor is connected with the warning light at thermal-insulated box top, and automatic warning light or audible alarm use when the temperature of the inside electrical component of thermal-insulated box surpasss and sets for the threshold value.
In the technical scheme, one end of two ends of the beam support is provided with a double-seat magnetic adsorption seat, and the other end of the two ends of the beam support is provided with a single-seat magnetic adsorption seat; each end of the beam support is rigidly connected with the magnetic adsorption seat at each end through a heat insulation gasket and an inclined plate; the magnetic adsorption seat is formed by wrapping cylindrical high-temperature strong magnets by a ferrite with good magnetic conductivity, and all the high-temperature strong magnets are only exposed on 1 surface of the bottom part so as to be directly and stably adsorbed on the high-temperature cylinder body.
In the technical scheme, the bottom surface of each magnetic adsorption seat is arranged in a way that the radian of the bottom surface of each magnetic adsorption seat is consistent with that of the surface of the cylinder.
In the technical scheme, the magnetic adsorption seat consists of a high-temperature strong magnet and an iron body, the iron body with the thickness of more than 2 mm and good magnetic conductivity wraps the high-temperature strong magnet, the double-seat magnetic adsorption seat is a cylindrical high-temperature magnet with the diameter of more than or equal to 25mm, and the single-seat magnetic adsorption seat is a cylindrical high-temperature magnet with the diameter of more than or equal to 30 mm.
Among the above-mentioned technical scheme, thermal-insulated soft cover is wrapped up between crossbeam support and the thermal-insulated box lateral wall, and this thermal-insulated soft cover bottom is provided with central through-hole to do not block and hinder the flexible measurement of electric type displacement sensor sending probe.
In the above technical scheme, the electrical displacement sensor is a contact type grating or capacitance grating micrometer displacement sensor.
In the technical scheme, the heat insulation device consists of heat insulation rods with the diameters larger than 30mm and the thicknesses larger than 10mm, and the front end of the heat insulation device is fixed with a telescopic probe with the extension range of 10-20mm.
In the above technical solution, the mobile microprocessor system is preferably a mobile processor device having a processor, such as a tablet computer and a smart phone.
A method for detecting and adjusting radial stress of a rotary kiln riding wheel in operation is characterized by comprising the following steps:
uniformly arranging 3 marking buses at 120 degrees in the circumferential direction of a rotary kiln cylinder, placing and adsorbing rotary kiln ellipticity measuring instruments at 3 measuring points which are intersected with the 3 marking buses and are parallel to and close to two sides of each wheel belt, and respectively collecting and measuring radial deformation or displacement of the 3 points on the cylinder when the rotary kiln ellipticity measuring instruments pass through a cylinder rotating square point in the process of one circle of rotation of a kiln, and acquiring ellipticity deformation curve data; the cylinder body rotation square points are B, F and A, C in a vertical direction and two riding wheel square points D and E positioned on two sides of a 6 o' clock point F in a vertical direction respectively;
respectively calculating the wave height difference of 3 measuring points on the section of the measured cylinder on the two sides of each wheel belt between the D point and the E point of the cylinder rotation square point and the F point to obtain the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference; calculating the ratio value of the radial stress of two sections at the high end and the low end corresponding to the two riding wheels of each wheel belt according to the ratio value between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference;
and adjusting the forward and backward positions of the high end and the low end of each idler on a horizontal plane according to the ratio of the radial stress, so that the two idlers of each belt are basically uniformly stressed in a radial direction.
In the technical scheme, in the same wheel with gears, according to a ratio value between an average value of (F-D) wave height difference and an average value of (F-E) wave height difference, ratio values of radial relative stress of two sections corresponding to the high end and the low end of two riding wheels are obtained;
or, under the conditions that different gears are driven by different gears, the thicknesses of all cylinders are basically the same, and the diameter difference is less than or equal to 10mm, the ratio value between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference of the measured section is in direct proportion to the average ratio value of the radial relative stress on the two riding wheels of each gear;
or, in the gear of different wheels, if the difference between the thicknesses of the cylinder bodies is less than or equal to 10mm and the difference between the diameters of the cylinder bodies is less than or equal to 40mm, the ratio of the average wave height difference value of the corresponding riding wheel, namely the ratio of the radial relative stress can be calculated according to the ratio of the thicknesses of the cylinder bodies.
In the technical scheme, if the average value of the height difference of the (F-D) wave of the measured section is 1/2 smaller than the average value of the height difference of the (F-E) wave, namely the radial stress of the riding wheel corresponding to the point D is relatively 1/2 smaller, the riding wheel with small radial stress is required to be adjusted inwards to bear larger stress, and the riding wheel with large radial stress is required to be retreated outwards to reduce stress;
in the process of adjusting all the supporting wheels on the horizontal plane, the lower end surface of each supporting wheel and a thrust disc of the supporting wheel keep a clearance which is more than or equal to 1-3mm all the time, namely all the supporting wheels respectively and basically and uniformly bear the downward axial thrust of the kiln cylinder; all riding wheels are adjusted step by step according to the following steps:
respectively adjusting the horizontal positions of the high end and the low end of the two riding wheels at each wheel belt until the average value of the (F-D) wave height difference in the micro-deformation curve rotating for one circle is basically equal to the average value of the (F-E) wave height difference measured at the 3 points of the corresponding section;
at different wheel belts, if the thicknesses of the cylinders are basically the same and the diameter difference is less than or equal to 40mm, the ratio value DEi between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference of the measured section of each gear is in direct proportion to the average ratio value of the radial relative stress on the two riding wheels on the measured section between the gears;
if the belt is 20-50% larger than the DEi measured by the measured sections of other belts, the two supporting rollers of the belt should simultaneously move back outwards in parallel so as to jointly reduce the radial stress of the two supporting rollers at the position; or two riding wheels at each other wheel belt should simultaneously enter inwards in parallel;
until the average value DEi of the radial relative stress of the two riding wheels in the micro-deformation curve of 3 measuring points of a circle of the cylinder body is measured on the high-end section and the low-end section of each riding wheel is basically equal;
if the thicknesses of the cylinders at the positions of the wheel belts are different and the diameter difference is less than or equal to 40mm, calculating to obtain a proportion value of the radial relative stress of the corresponding riding wheel according to the proportion value of the thicknesses of the cylinders; the correlation adjustment is performed with reference to the points of the above-mentioned respective sections.
In the technical scheme, the rotary kiln is provided with more than or equal to 2 groups of wheel belts and riding wheel groups, and the left riding wheel and the right riding wheel are a gear.
In the technical scheme, the rotary kiln is a cement rotary kiln, an alumina rotary kiln, a limestone rotary kiln in ferrous metallurgy industry and a pellet rotary kiln.
In the technical scheme, the rotary kiln ellipticity measuring instrument is parallelly arranged at any distance close to two sides of each belt wheel and is adsorbed at 3 points where the section of the cylinder body is intersected with 3 marking buses, so that the rotary kiln ellipticity measuring instrument can be arranged at any measuring point position of the rotary kiln cylinder body extending along the marking buses to measure cylinder body ellipticity deformation.
The invention discloses a method and a measuring instrument for detecting and adjusting the radial stress of riding wheels of a rotary kiln in operation, wherein the measuring instrument is arranged close to each wheel to adsorb the ovality measuring instrument of the rotary kiln at 3 equally-divided points on the circumference of a cylinder body, the measuring instrument measures the radial tiny ovality deformation curve data of the 3 points on the cylinder body in the process of one circle of rotation of the kiln, the radial relative stress proportion value of two riding wheels on the measured section of each gear is obtained by analyzing and comparing the oscillograms of 2 waves of the curve, and the advancing and retreating positions of each riding wheel are adjusted on the horizontal plane according to the radial relative stress proportion value, so that each riding wheel of each gear is basically and uniformly stressed in the radial direction. The invention has simple measurement operation, can be conveniently operated by common technicians of cement production companies, can quickly and reliably use the kiln ovality measuring instrument to complete the measurement and adjustment work of the riding wheels, can immediately analyze and obtain the radial relative stress measurement result of each retaining riding wheel of the kiln, and saves the measurement time and the cost.
The invention has the following beneficial effects:
the device and the method have simple measurement operation, can finish measurement only by conveniently selecting three measuring points, can be conveniently operated by ordinary technicians of cement production companies, can quickly and reliably finish the measurement and adjustment work of the riding wheels by using the kiln ovality measuring instrument, can immediately analyze and obtain the radial relative stress measurement result of each riding wheel of the kiln, and saves the measurement time and the cost.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic view (front view direction) of an ovality measuring apparatus of a rotary kiln of the present invention.
FIG. 2 is a bottom view of the rotary kiln ovality measurement of the present invention.
FIG. 3 is a micro-deformation curve of the cylinder measured by the ovality measuring device in one revolution of the kiln according to the present invention.
Fig. 4 is a measurement schematic diagram of the present invention.
FIG. 5 is a schematic view of the ovality measuring device of the present invention mounted on a rotary kiln.
The reference numerals in fig. 1-5 are illustrated as follows:
1. adjustable measuring head, 2, heat insulation device, 3, micrometer displacement sensor, 4, double-seat magnetic suction seat, 5, alarm indicator light, 6, single-seat magnetic suction seat, 7, inclined plate, 8, heat insulation plate, 9, double-seat plate, 10, single-seat plate, 11, battery power supply, 12, power line, 13, data line, 14, acquisition and wireless transmission device,
15. a wireless receiving module, 16, a beam, 17, a heat insulation box, 18, a microcomputer processing system, 19, a beam central hole, 20, a cylinder body, 21 and a wheel belt, 22, a riding wheel, 23, an ovality measuring instrument of the rotary kiln, 24, marking generatrices on the cylinder body, I, II and III are serial numbers of 3 marking generatrices respectively;
i is the gear serial number of the wheel belt;
phi is the outer diameter of the cylinder; a is the major axis of the ellipse and b is the minor axis of the ellipse; the radial difference a-b = Δ H.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and fig. 2, the ovality measuring apparatus 23 of the rotary kiln implemented according to the present invention mainly comprises a beam support 16, an electrical displacement sensor 3, a collecting and wireless transmitting device 14, a wireless receiving module 15, and a microcomputer processing system 18;
the bottom parts of two ends of the beam support 16 are symmetrically provided with a double-seat magnetic suction seat 4 and a single-seat magnetic suction seat 6 respectively, and a through hole 19 is arranged at the middle line of the beam support 16;
the heat insulation box 17 is arranged in the middle position above the beam support 16, the electric displacement sensor 3, the acquisition and wireless transmission device 14, the battery power supply 11, the temperature measurement sensor and the like are arranged in the heat insulation box 17, and the battery power supply 11 continuously supplies power for the electric displacement sensor 3, the acquisition and wireless transmission device 14 and the like;
the measuring rod of the electric displacement sensor 3 is arranged on the central line of the beam support 16 and extends out of the through hole 19 of the beam support; the front end of the measuring rod of the electrical displacement sensor is provided with a heat insulation device 2, the front end of the heat insulation device 2 is fixed with an adjustable (telescopic) measuring head 1, and the measuring head 1 is contacted with a measured point on the surface of the cylinder 20 to carry out radial displacement measurement;
the output end of the electric displacement sensor 14 is connected with the acquisition and wireless transmission device 14 through a data line 12 so as to realize real-time wireless transmission of data; the microcomputer processing system 18 automatically receives data in real time through the wireless receiving module 15, and gives radial tiny (ovality) deformation curve data at the surface measuring point of the kiln cylinder body 20 according to a software program;
the temperature measuring sensor is connected with the red indicator lamp 5 at the top of the heat insulation box 17, and when the temperature of the electric components in the heat insulation box 17 exceeds a set threshold value, the indicator lamp 5 or sound alarm is automatically carried out; the temperature sensor is disposed on or near the primary element within the insulated box 17.
Before the instrument is used for measuring the ellipticity of the rotary kiln, heat-insulating soft covers are wrapped in the two supports of the crossbeam 16 of the measuring instrument and the side walls and the periphery of the heat-insulating box 17, and a central through hole is formed in the bottom of each heat-insulating soft cover, so that the free telescopic measurement of a measuring rod of the electric displacement sensor 3 is not hindered;
the double-seat plate 9 and the single-seat plate 10 at the two ends of the beam support 16 are respectively and rigidly connected through respective magnetic suction seats (a double-seat magnetic suction seat 4 and a single-seat magnetic suction seat 6) of the heat insulation plate 8 and the inclined plate 7, the two magnetic suction seats (the double-seat magnetic suction seat 4 and the single-seat magnetic suction seat 6) are high-temperature strong magnets, and the beam support 16 and a measuring device on the beam support are sucked on the surface of a measured kiln cylinder body 20 through the high-temperature strong magnets.
The wireless receiving module 15 is provided with a USB interface, and the USB interface is connected to a mobile microcomputer processing system 18 (such as a tablet computer, a palm PDA, and a smart phone).
The collecting and wireless transmission device 14 is an integrated circuit board, and components such as a measurement collecting and transmission element, a temperature measuring sensor and the like are integrated on the integrated circuit board and assembled in the heat insulation box 17.
The microcomputer processing system 18 is used for receiving the wireless transmission data of the measured result of the kiln ovality measuring instrument, and is provided with a processing software program to automatically draw an oval curve of each measuring point of the cylinder body.
Since the angular orientations and the deformation of the cylinder in the circumferential direction are different at different positions of the cylinder, as shown in fig. 3, in the normal rotation process of the production kiln measured on site, the ovality micro-deformation curve is obtained as shown in fig. 4 when the ellipsometer is adsorbed at the same measuring point on the cylinder and passes through A, B, C, D, F, E in each angular orientation along with the rotation of the kiln cylinder.
The method for detecting and adjusting the radial stress of the riding wheel of the rotary kiln in operation comprises the following steps:
the first step is as follows: referring to fig. 5, 3 marking buses 24 are uniformly arranged in the circumferential direction of the cylinder 20 at 120 degrees, corresponding marks are marked on two sides of each belt 21 position of the cylinder by scribing, and the serial numbers of the three marking buses 24 are respectively set as a marking bus I, a marking bus ii and a marking bus iii;
the second step: opening a measuring switch on the kiln ellipse measuring instrument 23, and installing the measuring instrument 23 at the position close to the cylinder mark I bus of the belt pulley 21, namely starting to measure;
the third step: meanwhile, the wireless receiving module 15 is inserted into a microcomputer processing system 18 (preferably a mobile tablet computer), a receiving program is started, and the measurement data is received;
the fourth step: repeating the measurement operation, and performing the same measurement operation at the positions of the three marks I, ii, and iii on the two sides of the three gear pulleys 21, respectively;
the fifth step: post-processing data
The measured data are arranged, an ovality curve of the cylinder body is drawn, and the deformation and the ovality of the cylinder body are calculated;
calculating the ratio of the radial stress of the two sections of the cylinder body D and E, corresponding to the high end and the low end, of the two riding wheels 22 according to the ratio of the (F-D) wave difference to the (F-E) wave difference of each measured section;
and a sixth step: regulating riding wheel in operation
If the height difference of the (F-D) or (F-E) waves is smaller, namely the radial stress of the corresponding (D or E) riding wheel is smaller, the riding wheel with small radial stress should be adjusted inwards to bear larger stress, and the riding wheel with large radial stress should be retreated outwards to reduce the stress;
in the process of adjusting all the supporting rollers on the horizontal plane, the lower end face of each supporting roller 22 and the thrust disc thereof always keep a proper gap (not less than 1-3 mm), namely all the supporting rollers 22 respectively and basically and uniformly bear the downward axial thrust of the kiln cylinder body 20; all riding wheels are adjusted according to the following steps:
the riding wheels at two sides of the same wheel are respectively adjusted when the same wheel is shifted until the height difference of (F-D) and (F-E) waves in a micro-deformation curve of the cylinder (rotating for one circle) is basically equal to that measured by the ellipticity measuring instrument 23;
under the condition that gears are driven by different wheels, if the thicknesses of the cylinder bodies are basically the same and the diameter difference is less than or equal to 40mm,average value DE of wave height difference of measured cross sections (F-D) and (F-E) in each (1 gear and 2 gear or 3 gear) i Proportional values between the two idler wheels are in direct proportion (numerical value) with the average value of the radial relative stress of the two idler wheels on the measured section of each gear;
if the average value of the measured section of the gearDE i The two riding wheels corresponding to the section are simultaneously adjusted inwards to bear larger stress;
otherwise, the average value of the measured section of the gear i DEThe two riding wheels with the corresponding sections are required to simultaneously retreat outwards to reduce the stress of the gear together when the gear is larger;
until the section of the ellipsometry measuring instrument 23 is measured at each i gear, the average value of the radial relative stress of the two riding wheels in the micro-deformation curve of the cylinder body (rotating for one circle) is measured i DEUntil substantially equal;
if the thicknesses of the cylinders are different and the diameter difference is less than or equal to 40mm, calculating to obtain the radial relative stress ratio value of the corresponding riding wheel according to the ratio value of the thicknesses of the cylinders; and (4) referring to the points of the sections, adjusting the related riding wheels.
Therefore, the kiln ellipticity measuring instrument is arranged close to each wheel belt and adsorbed at 3 equally-divided points on the circumference of the cylinder body, the measuring instrument measures radial tiny ellipticity deformation curve data of the 3 points on the cylinder body in the process of one circle of kiln rotation, the radial tiny ellipticity deformation curve data is sent to a tablet personal computer in a wireless mode, the radial relative stress proportion values of the two riding wheels on the measured cross section of each gear are obtained by analyzing and comparing 2 waves of the curve, and the advancing and retreating positions of the riding wheels are adjusted on the horizontal plane according to the radial relative stress proportion values, so that each riding wheel of each gear is basically and uniformly stressed in the radial direction. The kiln ellipsometer can also be arranged at any position of a rotary kiln cylinder to measure the ellipticity deformation curve data.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. An ovality measuring instrument of a rotary kiln is characterized by comprising:
the adsorption type displacement detection device is detachably fixed on the surface of the cylinder of the rotary kiln, and an electric displacement sensor with a telescopic probe is arranged at the position closest to the radial direction of the cylinder, wherein the telescopic probe can linearly displace along the radial direction of the cylinder according to the deformation of the cylinder with a measuring point contacted with the telescopic probe;
a signal end of the electrical displacement sensor is arranged at one end of the telescopic probe in the radial direction, which is far away from the surface of the cylinder body, and a heat insulation device is arranged between the telescopic probe and the signal end of the electrical displacement sensor; the signal end of the electrical displacement sensor is arranged in the heat insulation box body and is respectively connected with the power supply device, the signal acquisition device and the wireless transmission device; the acquisition and wireless transmission device is in wireless communication with the mobile microcomputer processing system to send displacement data; the mobile microcomputer processing system is used for receiving the displacement data and giving radial micro-deformation curve data at the measuring point on the surface of the kiln cylinder body.
2. The ovality measuring instrument of the rotary kiln as claimed in claim 1, wherein a beam support is provided, an electrical displacement sensor with a retractable probe is provided at the position of the center line of the beam support, the retractable probe extends out of a through hole at the center line of the beam support and can linearly displace according to the deformation of a cylinder body of a measuring point contacted by the retractable probe; the magnetic adsorption seat is rigidly arranged at the two ends of the beam support through the heat insulation device and the supporting device, the bottom of the magnetic adsorption seat is used for adsorbing the beam support on the surface of the cylinder, and the bottom surface of each magnetic adsorption seat is uniformly arranged with the radian of the surface of the cylinder.
3. The ovality measuring instrument of the rotary kiln as claimed in claim 1, wherein a temperature measuring sensor is further provided with an alarm lamp at the top of the heat insulation box body, the temperature measuring sensor is connected with the alarm lamp, and when the temperature of the electrical components inside the heat insulation box exceeds a set threshold value, the alarm lamp or sound is automatically used for alarming.
4. The ovality measuring instrument of the rotary kiln as recited in claim 1, wherein one of the two ends of the beam support is provided with a double-seat magnetic adsorption seat, and the other end is provided with a single-seat magnetic adsorption seat; each end of the beam support is rigidly connected with the magnetic adsorption seat at each end through a heat insulation gasket and an inclined plate; the magnetic adsorption seat is formed by wrapping cylindrical high-temperature strong magnets by a ferrite with good magnetic conductivity, and all the high-temperature strong magnets are only exposed on 1 surface of the bottom part so as to be directly and stably adsorbed on the high-temperature cylinder body.
5. The ovality measuring instrument of the rotary kiln as claimed in claim 1, wherein a heat insulating soft cover is wrapped between the beam support and the side wall of the heat insulating box, and a central through hole is formed in the bottom of the heat insulating soft cover so as not to block and prevent the telescopic measurement of the probe of the electric displacement sensor.
6. The ovality measuring instrument of the rotary kiln as claimed in claim 1, wherein the electrical displacement sensor is a contact type optical grating and capacitive grating micrometer displacement sensor.
7. The ovality measuring instrument of the rotary kiln as recited in claim 1, wherein the heat insulating device is composed of a heat insulating rod with a diameter of more than 30mm and a thickness of more than 10mm, and the extension range of the retractable probe fixed at the front end of the heat insulating device is 10-20mm.
8. A method for detecting and adjusting radial stress of a rotary kiln riding wheel in operation is characterized by comprising the following steps:
uniformly arranging 3 marking buses at 120 degrees in the circumferential direction of a rotary kiln cylinder, placing and adsorbing rotary kiln ellipticity measuring instruments at 3 measuring points which are intersected with the 3 marking buses and are parallel to and close to two sides of each wheel belt, and respectively collecting and measuring radial deformation or displacement of the 3 points on the cylinder when the rotary kiln ellipticity measuring instruments pass through a cylinder rotating square point in the process of one circle of rotation of a kiln, and acquiring ellipticity deformation curve data; the cylinder body rotation square points are B, F and A, C in a vertical direction and two riding wheel square points D and E positioned on two sides of a 6 o' clock point F in a vertical direction respectively;
respectively calculating the wave height difference of 3 measuring points on the section of the measured cylinder on the two sides of each wheel belt between the D point and the E point of the cylinder rotation square point and the F point to obtain the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference; calculating the ratio value of the radial stress of two sections of a high end and a low end corresponding to two riding wheels of each wheel belt according to the ratio value between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference;
and adjusting the forward and backward positions of the high end and the low end of each idler on a horizontal plane according to the ratio of the radial stress, so that the two idlers of each belt are basically uniformly stressed in a radial direction.
9. The method for detecting and adjusting the radial stress of the riding wheels of the rotary kiln in operation as claimed in claim 8, wherein in the same wheel gear, the ratio values of the radial relative stress of the two sections corresponding to the high end and the low end of the two riding wheels are obtained according to the ratio value between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference;
or, under the conditions that different gears are driven by different gears, the thicknesses of all cylinders are basically the same, and the diameter difference is less than or equal to 10mm, the ratio value between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference of the measured section is in direct proportion to the average ratio value of the radial relative stress on the two riding wheels of each gear;
or, in the gear shifting of different wheels, if the difference between the thicknesses of the cylinders is less than or equal to 10mm and the difference between the diameters of the cylinders is less than or equal to 40mm, the ratio of the average wave height difference value of the corresponding riding wheels, namely the ratio of the radial relative stress can be calculated according to the ratio of the thicknesses of the cylinders.
10. The method of detecting and adjusting the radial stress of a riding wheel of a rotary kiln in operation as claimed in claim 8, wherein:
if the average value of the wave height difference of the measured section (F-D) is smaller than the average value of the wave height difference of the measured section (F-E) by 1/2, namely the radial stress of the riding wheel corresponding to the point D is relatively smaller by 1/2, the riding wheel with small radial stress is adjusted inwards to bear larger stress, and the riding wheel with large radial stress is moved backwards outwards to reduce stress;
in the process of adjusting all the supporting wheels on the horizontal plane, the lower end surface of each supporting wheel and a thrust disc of the supporting wheel keep a clearance which is more than or equal to 1-3mm all the time, namely all the supporting wheels respectively and basically and uniformly bear the downward axial thrust of the kiln cylinder; and (3) sequentially and gradually adjusting all the riding wheels according to the following steps:
respectively adjusting the horizontal positions of the high end and the low end of the two riding wheels at each wheel belt until the average value of the (F-D) wave height difference in the micro-deformation curve rotating for one circle is basically equal to the average value of the (F-E) wave height difference measured at the 3 points of the corresponding section;
at different wheel belts, if the thicknesses of the cylinders at all positions are basically the same and the diameter difference is less than or equal to 40mm, the proportion value DEi between the average value of the (F-D) wave height difference and the average value of the (F-E) wave height difference of the measured section of each gear is in direct proportion to the average proportion value of the radial relative stress on the two riding wheels on the measured section between the gears;
if the belt is 20-50% larger than the DEi measured by the measured sections of other belts, the two supporting rollers of the belt should simultaneously move back outwards in parallel so as to jointly reduce the radial stress of the two supporting rollers at the position; or two riding wheels at each other wheel belt should simultaneously enter inwards in parallel;
until the average value DEi of the radial relative stress of the two riding wheels in the micro-deformation curve of 3 measuring points of a circle of the cylinder body is measured on the high-end section and the low-end section of each riding wheel is basically equal;
if the thicknesses of the cylinders at the positions of the wheel belts are different and the diameter difference is less than or equal to 40mm, calculating to obtain a proportional value of the radial relative stress of the corresponding riding wheel according to the proportional value of the thicknesses of the cylinders; the correlation adjustment is performed with reference to the points of the above-mentioned respective sections.
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| CN202211287650.XA CN115752287A (en) | 2022-10-20 | 2022-10-20 | Method and measuring instrument for detecting and adjusting radial stress of rotary kiln riding wheel in operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255826A (en) * | 2023-05-15 | 2023-06-13 | 江苏圣曼科技工程有限公司 | Rotary kiln riding wheel position detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255826A (en) * | 2023-05-15 | 2023-06-13 | 江苏圣曼科技工程有限公司 | Rotary kiln riding wheel position detection device |
| CN116255826B (en) * | 2023-05-15 | 2023-08-15 | 江苏圣曼科技工程有限公司 | Rotary kiln riding wheel position detection device |
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