CN112404144A - Accurate temperature measurement method for rolling mill oil film bearing - Google Patents
Accurate temperature measurement method for rolling mill oil film bearing Download PDFInfo
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- CN112404144A CN112404144A CN202011071810.8A CN202011071810A CN112404144A CN 112404144 A CN112404144 A CN 112404144A CN 202011071810 A CN202011071810 A CN 202011071810A CN 112404144 A CN112404144 A CN 112404144A
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- temperature
- rolling mill
- oil film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/006—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring temperature
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Abstract
The invention belongs to the field of rolling mill hydrodynamic lubrication bearings, and particularly relates to an accurate temperature measurement method for a rolling mill oil film bearing. In order to ensure that the temperature of the bearing can be measured more accurately under various operating conditions and improve the reliability of the operation of the bearing of the rolling mill, the method comprises the following steps. S100, determining the eccentricity of the bearing under the working condition according to the specific working condition of the actual bearing operation, the rotating speed and the load of the bearing. S200, machining a temperature measuring hole in the rolling mill oil film bearing bush. S300, setting the distribution angle of the temperature measuring holes of the oil film bearing bush of the rolling mill according to the eccentricity of the bearing, namely, different eccentricity of the bearing corresponds to different temperature measuring hole angle values. S400, measuring the temperature of the temperature measuring hole in the running process of the rolling mill. The invention takes the eccentricity as a variable to determine the included angle of the temperature measuring holes, and the temperature of the bearing is measured according to the difference of the included angles between the maximum heating area of the bearing and the bearing direction under different eccentricities, thereby ensuring more accurate temperature which can be measured when the bearing rotates at different speeds and bears, and improving the running reliability of the bearing of the rolling mill.
Description
Technical Field
The invention belongs to the field of rolling mill hydrodynamic lubrication bearings, and particularly relates to an accurate temperature measurement method for a rolling mill oil film bearing.
Background
In the running process of the rolling mill, if the temperature of the bearing is monitored, when the temperature of the bearing is abnormal, the temperature measuring device can send out an alarm signal, and field operators can check the running condition of the bearing in time, so that the loss can be reduced, and the burning loss of the bearing in abnormal running can be avoided.
Because the rolling mill bearing belongs to a hydrodynamic lubrication bearing, a specific deviation angle is generated in the running process of the bearing, and the deviation angle is related to the bearing load and the rotating speed of the bearing, so that the maximum heating area of the bearing is the dynamic pressure oil film central pressure area. The location of the area of greatest pressure is at the offset angle of the bearing. Because the central pressure area of the oil film bearing of the rolling mill can change along with the rotating speed and the load, the maximum heating area of the bearing changes along with the bearing and the rotating speed of the bearing, the conventional bearing temperature measurement mode is fixed temperature measurement at present, namely, the temperature measurement position is fixed, so that when the rotating speed and the load of the bearing change, the highest temperature area is not in the temperature measurement area, the temperature fed back is lower than the actual central area, and therefore, when the temperature of the central area of the bearing is abnormal, the temperature measurement device cannot feed back timely, and the bearing is damaged.
Disclosure of Invention
The invention provides an accurate temperature measuring method for an oil film bearing of a rolling mill, aiming at ensuring that the temperature of the bearing can be measured more accurately under various operating conditions and improving the operating reliability of the bearing of the rolling mill.
The invention adopts the following technical scheme: a method for accurately measuring the temperature of an oil film bearing of a rolling mill comprises the following steps.
S100, determining the eccentricity of the bearing under the working condition according to the specific working condition of the actual bearing operation, the rotating speed and the load of the bearing.
S200, machining a temperature measuring hole in the rolling mill oil film bearing bush.
S300, setting the distribution angle of the temperature measuring holes of the oil film bearing bush of the rolling mill according to the eccentricity of the bearing, namely setting different bearing eccentricities corresponding to different temperature measuring hole angle values, wherein the temperature measuring hole angle A of the bush and the bearing eccentricity satisfy the following relation:
eccentricity ratio
When the temperature of the water is higher than the set temperature,
；
s400, measuring the temperature of the temperature measuring hole in the running process of the rolling mill.
Further, the angular distribution positions of the temperature measuring holes are opposite to the rotation area of the bearing, and the 180-degree direction positions of the temperature measuring holes are processed by one.
Further, for the reversible rolling mill, the temperature measuring holes are respectively processed on two sides of the center of the bearing, and the same temperature measuring hole is processed on the other working surface.
The depth of the temperature measuring hole is the distance from the end face of the bushing to the central plane, namely the distance of the hole depth is L/2; ensuring that the distance from the center of the temperature measuring hole to the inner hole of the bushing is 0.65-0.75 e; wherein L is the length of the rolling mill oil film bearing bush, and e is the wall thickness of the bush.
Compared with the prior art, the included angle of the temperature measuring hole is determined by taking the eccentricity as a variable, and the temperature of the bearing is measured according to different included angles of the maximum heating area and the bearing direction of the bearing under different eccentricities, so that more accurate temperature which can be measured at different rotating speeds and during bearing of the bearing is ensured, and the running reliability of the bearing of the rolling mill is improved.
Drawings
FIG. 1 is a schematic view of a hydrodynamic lubrication bearing load;
FIG. 2 is a schematic view of the depth and pitch of the temperature measuring holes;
FIG. 3 is a schematic view of the angular position of the temperature measuring hole;
FIG. 4 is a schematic view of the position of the temperature measuring holes of the reversible mill;
in the figure, 1 is oil film pressure, 2 is the included angle of the maximum heating area, and 3 is a temperature measuring hole.
Detailed Description
A method for accurately measuring the temperature of an oil film bearing of a rolling mill comprises the following steps.
S100, determining the eccentricity of the bearing under the working condition according to the specific working condition of the actual bearing operation, the rotating speed and the bearing of the bearing. The position of the bearing load bearing zone varies at different eccentricities. Because the rolling mill oil film bearing belongs to the working condition of low speed and heavy load, the bearing is in a running state with high eccentricity under most conditions. The included angle between the maximum heating interval of the bearing and the bearing direction under different eccentricities can be obtained through a CFD simulation technology. The eccentricity can be found out according to the operating conditions of each unit of the rolling mill (the rotating speed and the rolling force of the rolling mill).
S200, machining a temperature measuring hole in the rolling mill oil film bearing bush. The depth of the temperature measuring hole is the distance from the end face of the bushing to the central plane, namely the distance of the hole depth is L/2; ensuring that the distance from the center of the temperature measuring hole to the inner hole of the bushing is 0.65-0.75 e; wherein L is the length of the rolling mill oil film bearing bush, and e is the wall thickness of the bush.
S300, setting the distribution angle of the temperature measuring holes of the rolling mill oil film bearing bush according to the eccentricity of the bearing, namely setting different eccentricity of the bearing corresponding to different angle values of the temperature measuring holes, wherein the maximum pressure and the included angle of the center line of the rolling mill oil film bearings with different specifications are the same as long as the eccentricity is the same, so that the eccentric rate is used as a variable to determine the included angle of the temperature measuring holes, and a lot of calculation workload can be saved. The bushing temperature measuring hole angle A and the bearing eccentricity x satisfy the following relation:
eccentricity ratio
When the temperature of the water is higher than the set temperature,
；
s400, measuring the temperature of the temperature measuring hole in the running process of the rolling mill. And taking the data with high measured temperature as reference data during temperature measurement.
The angle distribution positions of the temperature measuring holes are in opposite directions of the bearing rotating area, in order to enable the two working surfaces of the bearing bush to measure the temperature, and one temperature measuring hole is machined in a 180-degree direction.
For a reversible rolling mill, because the oil film bearing of the rolling mill rotates forwards and backwards, the temperature measuring holes are respectively processed on two sides of the center of the bearing, and the same temperature measuring hole is processed on the other working surface.
Claims (4)
1. A method for accurately measuring the temperature of an oil film bearing of a rolling mill is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s100, determining the eccentricity of the bearing under the working condition according to the specific working condition of the actual bearing operation, the rotating speed and the load of the bearing;
s200, processing a temperature measuring hole on an oil film bearing bush of the rolling mill;
s300, setting the distribution angle of the temperature measuring holes of the oil film bearing bush of the rolling mill according to the eccentricity of the bearing, namely setting different bearing eccentricities corresponding to different temperature measuring hole angle values, wherein the temperature measuring hole angle A of the bush and the bearing eccentricity satisfy the following relation:
eccentricity ratio
When the temperature of the water is higher than the set temperature,
；
s400, measuring the temperature of the temperature measuring hole in the running process of the rolling mill.
2. The method for accurately measuring the temperature of a rolling mill oil film bearing of claim 1, wherein the method comprises the following steps: the angular distribution positions of the temperature measuring holes are opposite to the rotating direction of the bearing, and the positions of the temperature measuring holes in the 180-degree direction are processed by one.
3. The method for accurately measuring the temperature of a rolling mill oil film bearing of claim 1, wherein the method comprises the following steps: for a reversible rolling mill, the temperature measuring holes are respectively processed on two sides of the center of the bearing, and the same temperature measuring hole is processed on the other working surface.
4. The method for the accurate temperature measurement of rolling mill oil film bearings according to claim 2 or 3, characterized in that: the depth of the temperature measuring hole is the distance from the end face of the bushing to the central plane, namely the distance of the hole depth is L/2; ensuring that the distance from the center of the temperature measuring hole to the inner hole of the bushing is 0.65-0.75 e; wherein L is the length of the rolling mill oil film bearing bush, and e is the wall thickness of the bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011071810.8A CN112404144B (en) | 2020-10-09 | 2020-10-09 | Accurate temperature measurement method for rolling mill oil film bearing |
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| CN202011071810.8A CN112404144B (en) | 2020-10-09 | 2020-10-09 | Accurate temperature measurement method for rolling mill oil film bearing |
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| CN112404144A true CN112404144A (en) | 2021-02-26 |
| CN112404144B CN112404144B (en) | 2022-08-30 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082440A1 (en) * | 1981-12-19 | 1983-06-29 | MANNESMANN Aktiengesellschaft | Oil film bearing |
| US4772137A (en) * | 1987-03-30 | 1988-09-20 | Morgan Construction Company | Oil film bearing and bushing |
| US5642105A (en) * | 1995-08-22 | 1997-06-24 | The Torrington Company | Bearing with an arrangement for obtaining an indication of the temperature within the bearing |
| CN2389024Y (en) * | 1999-09-13 | 2000-07-26 | 太原重型机械(集团)有限公司 | Oil film bearing capable of monitoring and controlling operation temperature |
| CN201974714U (en) * | 2011-01-07 | 2011-09-14 | 新疆八一钢铁股份有限公司 | Improved oil film bearing temperature monitoring device |
| CN107100934A (en) * | 2017-05-08 | 2017-08-29 | 黑龙江圣邦投资咨询有限公司 | A kind of filmatic bearing bushing |
| CN207238761U (en) * | 2017-09-01 | 2018-04-17 | 唐山钢铁集团有限责任公司 | A kind of hot rolling oil film temperature measuring equipment |
| CN212821785U (en) * | 2019-12-31 | 2021-03-30 | 涿神有色金属加工专用设备有限公司 | Aluminum foil rolling mill backing roll bearing temperature measurement system |
| CN113118222A (en) * | 2021-04-26 | 2021-07-16 | 重庆钢铁股份有限公司 | Oil film bearing and detection method thereof |
-
2020
- 2020-10-09 CN CN202011071810.8A patent/CN112404144B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082440A1 (en) * | 1981-12-19 | 1983-06-29 | MANNESMANN Aktiengesellschaft | Oil film bearing |
| US4772137A (en) * | 1987-03-30 | 1988-09-20 | Morgan Construction Company | Oil film bearing and bushing |
| US5642105A (en) * | 1995-08-22 | 1997-06-24 | The Torrington Company | Bearing with an arrangement for obtaining an indication of the temperature within the bearing |
| CN2389024Y (en) * | 1999-09-13 | 2000-07-26 | 太原重型机械(集团)有限公司 | Oil film bearing capable of monitoring and controlling operation temperature |
| CN201974714U (en) * | 2011-01-07 | 2011-09-14 | 新疆八一钢铁股份有限公司 | Improved oil film bearing temperature monitoring device |
| CN107100934A (en) * | 2017-05-08 | 2017-08-29 | 黑龙江圣邦投资咨询有限公司 | A kind of filmatic bearing bushing |
| CN207238761U (en) * | 2017-09-01 | 2018-04-17 | 唐山钢铁集团有限责任公司 | A kind of hot rolling oil film temperature measuring equipment |
| CN212821785U (en) * | 2019-12-31 | 2021-03-30 | 涿神有色金属加工专用设备有限公司 | Aluminum foil rolling mill backing roll bearing temperature measurement system |
| CN113118222A (en) * | 2021-04-26 | 2021-07-16 | 重庆钢铁股份有限公司 | Oil film bearing and detection method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李宏等: "多点无线远距离监控油膜轴承在线实时测温装置", 《科技情报开发与经济》 * |
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| CN112404144B (en) | 2022-08-30 |
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