CN110307258B - Intelligent bearing with temperature measurement sensing and control function and preparation method thereof - Google Patents
Intelligent bearing with temperature measurement sensing and control function and preparation method thereof Download PDFInfo
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- CN110307258B CN110307258B CN201910624400.2A CN201910624400A CN110307258B CN 110307258 B CN110307258 B CN 110307258B CN 201910624400 A CN201910624400 A CN 201910624400A CN 110307258 B CN110307258 B CN 110307258B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to an intelligent bearing with temperature measurement sensing and control functions and a preparation method thereof, and belongs to the technical field of intelligent bearings. According to the intelligent bearing with the temperature measurement sensing and control function, the modified barium titanate-based heat-sensitive material layer is sprayed on the outer surface of the outer ring, and the Curie temperature of barium titanate is increased by adding barium titanate, lithium titanate, lanthanum titanate and praseodymium titanate. The end face of the outer ring which is sprayed with the ceramic layer and the end face of the outer surface which is sprayed with the thermosensitive ceramic are respectively provided with an electric signal contact, and the temperature change of the bearing in the running process can be accurately monitored in real time through an intelligent system. An intermediate material layer of barium titanate/benzoxazine resin/phenolic resin composite material is sprayed between the outer surface of the outer ring and the thermosensitive ceramic coating, so that the cohesiveness, the corrosion resistance and the processability of the thermosensitive ceramic coating composite material layer and the bearing outer ring matrix can be enhanced. The preparation method of the intelligent bearing with the temperature measurement sensing and controlling function, disclosed by the invention, has the advantages of easiness in obtaining raw materials, stability and reliability, and suitability for large-scale production.
Description
Technical Field
The invention relates to an intelligent bearing with temperature measurement sensing and control functions and a preparation method thereof, and belongs to the technical field of intelligent bearings.
Background
The bearing is an important part for ensuring the normal and safe operation of a transmission system, the working temperature of the bearing steel material is usually lower than 80 ℃, the working temperature of the bearing steel material generally cannot exceed 120 ℃, and as long as the temperature value is higher than a rated allowable value, the working surface of a rotating raceway is continuously subjected to alternating force to generate material fatigue failure. Fatigue failure is in the form of fatigue cracking or spalling of the raceway contacting surfaces, resulting in overheating of the bearing until complete failure.
The long-time running of bearing also can cause natural wear failure, and the microscopic arch on raceway frictional surface and the foreign matter that drops make the surface atress uneven when wearing and tearing became invalid make local frictional heating cause local deformation, all can lead to the bearing to damage. Especially under the bearing service condition of special operating mode, discover and perceive in advance whether the bearing has the anomaly, it is very important to change the bearing in time. The bearing is subjected to alternating force fatigue damage or natural wear damage, so that the bearing generates heat, and the bearing damage is accelerated at high temperature. The bearing with the temperature measurement sensing control intelligent technology can alarm and replace a fatigue-damaged or worn bearing as soon as the temperature of the bearing exceeds a limit value, and avoids the occurrence of greater loss of equipment.
Therefore, in order to improve economic and production benefits, the bearing operating temperature needs to be monitored in real time during the design of the special working condition bearing, and an alarm is given out when abnormal conditions or the operating temperature exceeds a specified limit value so as to find and process problems in time.
The method for monitoring the running temperature of the bearing in real time in the prior art is to add a temperature monitoring device, for example, the invention patent application No. 201711277084.3 publication No. 107830067A discloses a temperature measuring structure of a steam turbine supporting bearing. The temperature sensor can truly reflect the temperature of the bearing, and meanwhile, the temperature sensor can be quickly replaced without detaching the bearing. The temperature measuring structure can ensure the accuracy of the temperature of the bearing, and simultaneously ensures that the sensor is easy to disassemble and replace, the whole process of the scheme is complex, and the bearing can not be used under certain special working conditions. The other scheme is that the PTC sensor is manufactured by using the resistance temperature characteristic of the thermal sensitive ceramic, real-time monitoring is carried out in a certain temperature range, the resistance value changes, the control system does not change in a normal temperature sensing range, and when the temperature exceeds a limit value, the PTC sensor gives a warning instruction to the control system.
Barium titanate-based positive temperature coefficient thermal sensitive material is one of materials commonly used for PTC stable sensing of bearings, but the Curie temperature of barium titanate is only 120 ℃, PTC thermal sensitive materials with Curie points exceeding 120 ℃ in the current market are all lead-containing, and lead piezoelectric components are prohibited from being used in 2006 in the world; at present, the lead-free positive temperature coefficient heat-sensitive material is mainly a high polymer material, but the high polymer material is easy to soften at high temperature, so that the lead-free positive temperature coefficient heat-sensitive material is easy to soften, deform and even fall off when the temperature is too high in the using process, and the using range of the lead-free positive temperature coefficient heat-sensitive material is limited.
Aiming at the problems of the prior art that the Curie temperature of the barium titanate-based positive temperature coefficient heat-sensitive material is too low and the high-molecular heat-sensitive material is easy to soften at high temperature in the intelligent bearing with the temperature measurement sensing and control function, the intelligent bearing with the temperature measurement sensing and control function and the preparation method thereof, which are made of the heat-sensitive material with high Curie temperature and stable high-temperature performance, are urgently needed to be developed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the intelligent bearing which is made of the thermosensitive material and has high Curie temperature and stable high-temperature performance and has the temperature measurement sensing and control function and the preparation method thereof. The intelligent bearing with the temperature measurement sensing and control function, prepared by the method, has the advantages of high Curie temperature, high temperature resistance, strong cohesiveness, high temperature deformation resistance, simple and convenient operation of the preparation method and easy large-scale production.
The specific technical scheme of the invention is as follows: the utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, outer lane surface spraying has thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed loop, through the temperature variation of intelligent system real-time supervision bearing in service.
Preferably, the thermosensitive ceramic coating is a thermosensitive material layer modified by any one of barium titanate, lithium titanate, lanthanum titanate and praseodymium titanate.
The preparation method of the barium titanate/benzoxazine resin/phenolic resin composite material comprises the following steps:
(1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.1-1.5: 1.2-2.5, sequentially adding aniline and phenol, uniformly stirring, slowly adding formaldehyde into the reaction kettle, gradually increasing the temperature to 95-110 ℃, and keeping the constant temperature for 3-4 hours. And then adding barium titanate powder into the system, uniformly stirring, and cooling to 40-50 ℃.
(2) Continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: and (3) heating the mixture to 75-90 ℃ at a formaldehyde molar ratio of 1: 1.2-2.5, keeping the temperature for 2-4 hours, carrying out reduced pressure distillation, and removing water and residual small molecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
Preferably, the amount of the barium titanate powder used in the step (1) is 2-3% of the total mass of the aniline, the phenol and the formaldehyde.
Preferably, the amount of the catalyst ammonium carbonate in the step (2) is 0.5-2% of the total mass of phenol and formaldehyde.
A preparation method of an intelligent bearing with temperature measurement sensing and control functions comprises the following steps:
A. preparing an intermediate material layer: and preparing the barium titanate/benzoxazine resin/phenolic resin composite material.
B. Pretreatment and cleaning: and (3) carrying out sand blasting on the surface of the bearing outer ring by using a sand blasting device to form a rough surface. And then putting the bearing outer ring subjected to sand blasting into a cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain the cleaned bearing outer ring.
C. Spraying an intermediate material layer: and B, uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step A and a curing agent according to the mass ratio of 1:1, performing dispersion spraying, uniformly spraying the surface of the outer ring subjected to sand blasting in the step B by using a plasma spraying system, and heating and curing to obtain a prefabricated part for later use.
D. Spraying a thermal sensitive ceramic coating: and uniformly spraying the modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain the intelligent bearing outer ring with the temperature measurement sensing and control function.
E. Assembling a bearing: and D, sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step D, into the rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing prepared in the step D into the rolling body, so as to obtain the intelligent bearing with the temperature measurement sensing and control function.
Preferably, the cleaning device in step B is an ultrasonic cleaning device.
Preferably, the curing agent in the step C is hexamethylenetetramine, and the curing condition is 90 ℃/40min +100 ℃/40min +130 ℃/40 min.
The invention has the beneficial effects that:
(1) according to the intelligent bearing with the temperature measurement sensing and control function, the barium titanate-based heat-sensitive material layer modified by any one of barium titanate, lithium titanate, lanthanum titanate and praseodymium titanate is sprayed on the outer surface of the outer ring, and the Curie temperature of barium titanate is increased by adding the barium titanate, the lithium titanate, the lanthanum titanate and the praseodymium titanate. The end face of the outer ring which is sprayed with the ceramic layer and the end face of the outer surface which is sprayed with the thermosensitive ceramic are respectively provided with an electric signal contact, and the temperature change of the bearing in the running process can be accurately monitored in real time through an intelligent system.
(2) According to the intelligent bearing with the temperature measurement sensing and control function, the intermediate material layer of the barium titanate/benzoxazine resin/phenolic resin composite material is sprayed between the outer surface of the outer ring and the thermal sensitive ceramic coating, so that the cohesiveness, the corrosion resistance and the processability of the thermal sensitive ceramic coating composite material layer and the bearing outer ring matrix can be enhanced, and the service life of the bearing is prolonged.
(3) The preparation method of the intelligent bearing with the temperature measurement sensing and controlling function, disclosed by the invention, has the advantages of easiness in obtaining raw materials, stability and reliability, and suitability for large-scale production.
Detailed Description
In order to better understand the invention, the following examples further illustrate the content of the invention, but the content of the invention is not limited to the following examples, and the examples should not be construed as limiting the scope of the invention.
Example 1
The utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, outer lane surface spraying has thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed loop, through the temperature variation of intelligent system real-time supervision bearing in service. The heat-sensitive material layer is a barium titanate-based heat-sensitive material layer modified by barium titanate.
A preparation method of an intelligent bearing with temperature measurement sensing and control functions comprises the following steps:
(1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.1: 1.2 adding aniline and phenol in turn, stirring uniformly, slowly adding formaldehyde into the reaction kettle, gradually increasing the temperature to 95 ℃, and keeping the constant temperature for 3 hours. Then adding barium titanate powder into the system, stirring uniformly and cooling to 40 ℃. The dosage of the barium titanate powder is 2 percent of the total mass of the aniline, the phenol and the formaldehyde.
(2) Continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: the molar ratio of formaldehyde is 1:1.2, and the dosage of the catalyst ammonium carbonate is 0.5 percent of the total mass of phenol and formaldehyde. Heating to 75 ℃, keeping the temperature for 2h, distilling under reduced pressure, and removing water and residual micromolecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
(3) Pretreatment and cleaning: and (3) carrying out sand blasting on the surface of the bearing outer ring by using a sand blasting device to form a rough surface. And then putting the bearing outer ring subjected to sand blasting into an ultrasonic cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain the cleaned bearing outer ring.
(4) Spraying an intermediate material layer: and (3) uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step (2) and a curing agent hexamethylenetetramine according to a mass ratio of 1:1 for dispersion spraying, uniformly spraying the outer ring surface subjected to sand blasting in the step (3) by using a plasma spraying system, heating and curing, wherein the curing conditions are 90 ℃/40min +100 ℃/40min +130 ℃/40min, and obtaining a prefabricated part for later use.
(5) Spraying a thermal sensitive ceramic coating: and uniformly spraying the modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain the intelligent bearing outer ring with the temperature measurement sensing and control function.
(6) Assembling a bearing: and (3) sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step (5), into a rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing with the temperature measurement sensing and control function into the outer ring of the intelligent bearing, which is prepared in the step (5), so as to obtain the intelligent bearing with the temperature measurement.
Example 2
The utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, outer lane surface spraying has thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed loop, through the temperature variation of intelligent system real-time supervision bearing in service. The heat-sensitive material layer is a lithium titanate modified barium titanate-based heat-sensitive material layer.
A preparation method of an intelligent bearing with temperature measurement sensing and control functions comprises the following steps:
(1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.2: 1.6 adding aniline and phenol in turn, stirring uniformly, slowly adding formaldehyde into the reaction kettle, gradually increasing the temperature to 100 ℃, and keeping the constant temperature for 3 hours. Then adding barium titanate powder into the system, stirring uniformly and cooling to 40 ℃. The dosage of the barium titanate powder is 2 percent of the total mass of the aniline, the phenol and the formaldehyde.
(2) Continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: the molar ratio of formaldehyde is 1:1.6, and the dosage of the catalyst ammonium carbonate is 1 percent of the total mass of phenol and formaldehyde. Heating to 80 ℃, keeping the temperature for 2.5h, distilling under reduced pressure, and removing water and residual micromolecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
(3) Pretreatment and cleaning: and (3) carrying out sand blasting on the surface of the bearing outer ring by using a sand blasting device to form a rough surface. And then putting the bearing outer ring subjected to sand blasting into an ultrasonic cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain the cleaned bearing outer ring.
(4) Spraying an intermediate material layer: and (3) uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step (2) and a curing agent hexamethylenetetramine according to a mass ratio of 1:1 for dispersion spraying, uniformly spraying the outer ring surface subjected to sand blasting in the step (3) by using a plasma spraying system, heating and curing, wherein the curing conditions are 90 ℃/40min +100 ℃/40min +130 ℃/40min, and obtaining a prefabricated part for later use.
(5) Spraying a thermal sensitive ceramic coating: and uniformly spraying the modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain the intelligent bearing outer ring with the temperature measurement sensing and control function.
(6) Assembling a bearing: and (3) sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step (5), into a rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing with the temperature measurement sensing and control function into the outer ring of the intelligent bearing, which is prepared in the step (5), so as to obtain the intelligent bearing with the temperature measurement.
Example 3
The utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, outer lane surface spraying has thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed loop, through the temperature variation of intelligent system real-time supervision bearing in service. The heat-sensitive material layer is a barium titanate-based heat-sensitive material layer modified by lanthanum titanate.
A preparation method of an intelligent bearing with temperature measurement sensing and control functions comprises the following steps:
(1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.4: 2.0 aniline and phenol are added in turn, after being stirred evenly, formaldehyde is slowly added into the reaction kettle, the temperature is gradually increased to 105 ℃, and then the constant temperature is kept for 3.5 hours. Then adding barium titanate powder into the system, stirring uniformly and cooling to 48 ℃. The dosage of the barium titanate powder is 3 percent of the total mass of the aniline, the phenol and the formaldehyde.
(2) Continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: the molar ratio of formaldehyde is 1:2.0, and the dosage of the catalyst ammonium carbonate is 1.5 percent of the total mass of phenol and formaldehyde. Heating to 85 ℃, keeping the temperature constant for 3.5h, distilling under reduced pressure, and removing water and residual micromolecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
(3) Pretreatment and cleaning: and (3) carrying out sand blasting on the surface of the bearing outer ring by using a sand blasting device to form a rough surface. And then putting the bearing outer ring subjected to sand blasting into an ultrasonic cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain the cleaned bearing outer ring.
(4) Spraying an intermediate material layer: and (3) uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step (2) and a curing agent hexamethylenetetramine according to a mass ratio of 1:1 for dispersion spraying, uniformly spraying the outer ring surface subjected to sand blasting in the step (3) by using a plasma spraying system, heating and curing, wherein the curing conditions are 90 ℃/40min +100 ℃/40min +130 ℃/40min, and obtaining a prefabricated part for later use.
(5) Spraying a thermal sensitive ceramic coating: and uniformly spraying the modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain the intelligent bearing outer ring with the temperature measurement sensing and control function.
(6) Assembling a bearing: and (3) sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step (5), into a rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing with the temperature measurement sensing and control function into the outer ring of the intelligent bearing, which is prepared in the step (5), so as to obtain the intelligent bearing with the temperature measurement.
Example 4
The utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, outer lane surface spraying has thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed loop, through the temperature variation of intelligent system real-time supervision bearing in service. The thermosensitive material layer is a praseodymium titanate modified barium titanate-based thermosensitive material layer.
A preparation method of an intelligent bearing with temperature measurement sensing and control functions comprises the following steps:
(1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.5: 2.5 adding aniline and phenol in turn, stirring uniformly, slowly adding formaldehyde into the reaction kettle, gradually increasing the temperature to 110 ℃, and keeping the constant temperature for 4 hours. Then adding barium titanate powder into the system, stirring uniformly and cooling to 50 ℃. The dosage of the barium titanate powder is 3 percent of the total mass of the aniline, the phenol and the formaldehyde.
(2) Continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: the molar ratio of formaldehyde is 1:2.5, and the dosage of the catalyst ammonium carbonate is 2% of the total mass of phenol and formaldehyde. Heating to 90 ℃, keeping the temperature for 4 hours, distilling under reduced pressure, and removing water and residual micromolecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
(3) Pretreatment and cleaning: and (3) carrying out sand blasting on the surface of the bearing outer ring by using a sand blasting device to form a rough surface. And then putting the bearing outer ring subjected to sand blasting into an ultrasonic cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain the cleaned bearing outer ring.
(4) Spraying an intermediate material layer: and (3) uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step (2) and a curing agent hexamethylenetetramine according to a mass ratio of 1:1 for dispersion spraying, uniformly spraying the outer ring surface subjected to sand blasting in the step (3) by using a plasma spraying system, heating and curing, wherein the curing conditions are 90 ℃/40min +100 ℃/40min +130 ℃/40min, and obtaining a prefabricated part for later use.
(5) Spraying a thermal sensitive ceramic coating: and uniformly spraying the modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain the intelligent bearing outer ring with the temperature measurement sensing and control function.
(6) Assembling a bearing: and (3) sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step (5), into a rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing with the temperature measurement sensing and control function into the outer ring of the intelligent bearing, which is prepared in the step (5), so as to obtain the intelligent bearing with the temperature measurement.
Comparative example 1
The same procedure as in example 1 was repeated except that the heat sensitive ceramic coating was not used.
Comparative example 2
The same procedure as in example 1 was repeated except that no intermediate layer of barium titanate/benzoxazine resin/phenol resin composite was used.
And (4) comparing the results:
the above examples 1 to 4 and comparative examples 1 to 2 were tested, respectively, and the performance indexes are shown in Table 1.
The detection result shows that: the modified barium titanate-based heat-sensitive material layer in barium titanate, lithium titanate, lanthanum titanate and praseodymium titanate is sprayed on the outer surface of the outer ring, so that the Curie temperature of barium titanate is improved, and details are shown in examples 1-4 and comparative example 1. The end face of the outer ring which is not coated with the ceramic layer and the end face of the outer surface which is coated with the thermal sensitive ceramic are respectively provided with an electric signal contact, the temperature change of the bearing in the running process can be accurately monitored in real time through an intelligent system, the resistivity, the heat conductivity coefficient and the lift-drag ratio of the bearing are improved to some extent, and the details are shown in examples 1-4 and comparative examples 1-2. An intermediate material layer of a barium titanate/benzoxazine resin/phenolic resin composite material is sprayed between the outer surface of the outer ring and the thermosensitive ceramic coating, so that the cohesiveness, corrosion resistance and processability of the thermosensitive ceramic coating composite material layer and the bearing outer ring substrate can be enhanced, the service life of the bearing is prolonged, and details are shown in examples 1-4 and a comparative example 2.
Claims (8)
1. The utility model provides an intelligent bearing with accuse function is felt in temperature measurement, includes outer lane, inner circle, keeps ware and a set of rolling element, its characterized in that: outer lane surface spraying have thermal sensitive ceramic coating and intermediate material layer, intermediate material layer be located between outer lane surface and the thermal sensitive ceramic coating, intermediate material layer be barium titanate/benzoxazine resin/phenolic resin combined material layer, outer lane end spraying ceramic layer terminal surface and surface spraying thermal sensitive ceramic terminal surface are equipped with the signal of telecommunication contact respectively, signal of telecommunication contact and intelligent control system electric connection form closed circuit, through the temperature variation of intelligent system real-time supervision bearing in service.
2. The intelligent bearing with temperature measurement sensing and control function as claimed in claim 1, wherein: the thermosensitive ceramic coating is a thermosensitive material layer modified by any one of barium titanate, lithium titanate, lanthanum titanate and praseodymium titanate.
3. A method for preparing an intelligent bearing with temperature measurement sensing and control function according to claim 2, characterized by comprising the following steps:
A. preparing an intermediate material layer: preparing a barium titanate/benzoxazine resin/phenolic resin composite material;
B. pretreatment and cleaning: sandblasting the surface of the bearing outer ring by using a sandblasting device to form a rough surface; then putting the bearing outer ring subjected to sand blasting into a cleaning device for cleaning so as to remove foreign matters and oil stains on the surface of the outer ring and obtain a cleaned bearing outer ring;
C. spraying an intermediate material layer: uniformly mixing the barium titanate/benzoxazine resin/phenolic resin composite material prepared in the step A and a curing agent according to the mass ratio of 1:1, performing dispersion spraying, uniformly spraying the outer ring surface subjected to sand blasting in the step B by using a plasma spraying system, and heating and curing to obtain a prefabricated part for later use;
D. spraying a thermal sensitive ceramic coating: uniformly spraying a modified barium titanate-based heat-sensitive material on the intermediate material layer by using a plasma spraying system to obtain an intelligent bearing outer ring with a temperature measurement sensing and control function;
E. assembling a bearing: and D, sleeving the outer ring and the inner ring of the intelligent bearing with the temperature measurement sensing and control function, which are prepared in the step D, into the rolling body, adjusting the distance between the rolling bodies according to the size of the retainer, and then, filling the outer ring of the intelligent bearing prepared in the step D into the rolling body, so as to obtain the intelligent bearing with the temperature measurement sensing and control function.
4. The method for preparing the intelligent bearing with the temperature measurement sensing and control function according to claim 3, wherein the method comprises the following steps: and B, the cleaning device in the step B is an ultrasonic cleaning device.
5. The method for preparing the intelligent bearing with the temperature measurement sensing and control function according to claim 3, wherein the method comprises the following steps: and C, the curing agent in the step C is hexamethylenetetramine, and the curing condition is 90 ℃/40min +100 ℃/40min +130 ℃/40 min.
6. The method for preparing an intelligent bearing with temperature measurement sensing and control function according to claim 3, wherein the step A comprises the following steps:
1) in a stainless steel reaction vessel equipped with a stirrer, a reflux condenser apparatus, according to the aniline: phenol: the molar ratio of formaldehyde is 1: 1.1-1.5: 1.2-2.5, sequentially adding aniline and phenol, uniformly stirring, slowly adding formaldehyde into a reaction kettle, gradually increasing the temperature to 95-110 ℃, and keeping the constant temperature for 3-4 hours; then adding barium titanate powder into the system, uniformly stirring, and cooling to 40-50 ℃;
2) continuously adding metered catalysts of ammonium carbonate, phenol and formaldehyde into the stainless steel reaction kettle, wherein the weight ratio of the phenol: the molar ratio of formaldehyde is 1: 1.2-2.5, heating to 75-90 ℃, keeping the temperature for 2-4 hours, distilling under reduced pressure, and removing water and residual micromolecules to obtain the barium titanate/benzoxazine resin/phenolic resin composite material.
7. The method for preparing the intelligent bearing with the temperature measurement sensing and control function according to claim 6, wherein the method comprises the following steps: the dosage of the barium titanate powder in the step 1) is 2-3% of the total mass of the aniline, the phenol and the formaldehyde.
8. The method for preparing the intelligent bearing with the temperature measurement sensing and control function according to claim 6, wherein the method comprises the following steps: the dosage of the catalyst ammonium carbonate in the step 2) is 0.5-2% of the total mass of phenol and formaldehyde.
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