CN210893474U - Device for online monitoring oil film temperature of composite material thrust bearing - Google Patents
Device for online monitoring oil film temperature of composite material thrust bearing Download PDFInfo
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- CN210893474U CN210893474U CN201922067139.9U CN201922067139U CN210893474U CN 210893474 U CN210893474 U CN 210893474U CN 201922067139 U CN201922067139 U CN 201922067139U CN 210893474 U CN210893474 U CN 210893474U
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Abstract
The utility model provides a device for online monitoring oil film temperature of a composite material thrust bearing, which comprises a composite material thrust bearing and an online oil film temperature monitoring assembly, wherein the composite material thrust bearing mainly comprises a tile base body and a composite material tile surface arranged on the tile base body; the composite material thrust bearing is provided with a tapered step-shaped mounting hole for mounting an on-line oil film temperature monitoring assembly, the mounting hole penetrates through the tile base body and the composite material tile surface, the axis of the mounting hole is perpendicular to the composite material tile surface, and the mounting hole is arranged at the highest position of the oil film temperature of the composite material thrust bearing; the composite tile surface is provided with a U-shaped oil drainage groove; the online oil film temperature monitoring assembly comprises an oil film temperature sensor and a sensor heat insulation sleeve sleeved outside a probe of the oil film temperature sensor. The utility model discloses can accurately the highest oil film temperature of on-line monitoring combined material thrust bearing tile face, judge the running state of bearing, it is big to overcome prior art tile body temperature measurement error, to making the problem that the warning lags easily causes the accident.
Description
Technical Field
The utility model relates to a bearing oil film temperature measurement technical field particularly, especially relates to a device of combined material thrust bearing on-line monitoring oil film temperature.
Background
The composite material thrust bearing has the advantages of high specific strength, good fatigue resistance, good antifriction and wear resistance and the like, and can replace the traditional babbit metal bearing bush to be widely applied to the fields of hydroelectric power generation equipment, mill gear boxes, metallurgical equipment, military industry and the like. When the bearing runs, if the temperature of the oil film is too high, the viscosity of lubricating oil is reduced, the bearing is further influenced to establish a pressure oil film with enough thickness, if the temperature cannot be controlled in time, the bearing burning accident can be caused, and therefore, the real-time monitoring of the temperature of the oil film of the composite material thrust bearing is an important means for ensuring the safe running of a unit.
In the prior art, most conventional monitoring devices for monitoring the temperature of the babbitt metal bearing bush are used, that is, as shown in fig. 1, the composite material thrust bearing comprises a bush base body and a thrust bearing composite material bush surface arranged on the bush base body, a temperature sensor is arranged in a bush base temperature sensor mounting hole from the outer diameter of the bush base along the direction perpendicular to the tangent line of the outer diameter, and the temperature of the measured bush base is used for judging the running state of the composite material thrust bearing. Because the bearing composite material tile surface has heat resistance, the temperature gradient between the monitored tile base and the oil film temperature of the composite material tile surface is very large, and the actual running state of the bearing cannot be truly reflected. And when the temperature of an oil film is suddenly increased due to abnormal operation of the bearing, the temperature of the monitored tile base body has a serious hysteresis phenomenon, so that the unit cannot alarm and control in time, and therefore a tile burning accident happens sometimes.
In order to solve the problems of the conventional bearing temperature monitoring device for the composite material thrust bearing, several devices for judging the running state of the bearing by monitoring the temperature of a bearing oil film are provided in the prior art. One of the devices is as shown in fig. 2, a temperature sensor mounting hole is processed in a bearing area of a composite material tile surface of a composite material thrust bearing along a direction perpendicular to the tile surface, the temperature sensor is embedded in the mounting hole, and the temperature measuring end of the sensor is lower than the tile surface of the composite material, so that the purpose of monitoring the temperature of a bearing oil film in real time is achieved, and the real running state of the bearing is further reflected. Firstly, an oil drainage channel is not processed on the composite material tile surface in the technology, so that a small amount of lubricating oil is trapped in a hole reserved above the probe end part of the temperature sensor when the bearing runs, and as the lubricating oil flows from the oil inlet side of the bearing to the oil outlet side, the oil pressure generated by the lubricating oil can cause the phenomena of bulging or cracking and the like at the position, close to the oil outlet side, of an orifice of a temperature sensor mounting hole along with the lapse of time, and further the composite material tile surface is damaged; meanwhile, impurities doped in the lubricating oil can be accumulated in the holes, and the accuracy of temperature monitoring is influenced. Secondly, when the temperature sensor is installed on the bearing, no sealing measure is taken, and the lubricating oil permeates into the pore to cause the pressure of the pressure oil film to be relieved.
In the other device, a mounting groove for mounting a temperature sensor device is arranged on the oil outlet side of the composite material thrust bearing, an opening facing the oil outlet side is formed in the oil outlet side, and the temperature sensor device is fixed in the mounting groove and can monitor the temperature of an oil film above the oil outlet side of the bearing in real time, as shown in fig. 3. Due to the limitation of the position of the mounting groove, the temperature measuring end of the temperature sensor device is still a certain distance away from the region with the highest oil film temperature; in addition, the sealing measures adopted by the technology aim at isolating the temperature measuring end part from lubricating oil in the oil groove, but the lubricating oil can also flow out along with the gap of the mounting groove, so that the oil film is decompressed, and cold oil flows back to mix into the measuring temperature, and the temperature is distorted.
At present, a device for monitoring the temperature of the oil film of the composite material thrust bearing is also provided. As shown in fig. 4, an oil film temperature measuring element is arranged in the area of the oil outlet end of the composite material tile surface close to the outer diameter, and the measuring element comprises: the temperature sensor selects an end part measurement type, the heat insulation sleeve is arranged outside a temperature sensor probe, the temperature sensor is arranged in a mounting hole groove from a tile base to the tile surface direction, the distance between the end part of the temperature sensor and the tile surface is 0.7-1.0 mm, and a temperature sensor oil discharge channel is machined on the tile surface. This technique has the following disadvantages: (1) the position of the temperature sensor is not specifically described, and the obtained bearing oil film temperature data is not necessarily the highest value of the oil film temperature; (2) the size range of the orifice of the mounting hole processed on the composite material tile surface is not specified, and if the size of the orifice is overlarge, the continuity of the establishment of the pressure oil film is influenced, and the stable operation of the bearing is influenced; (3) the maximum value of the depth of the oil drainage groove is not specified, if the depth of the oil drainage groove is too deep, the accuracy of oil film temperature measurement can be influenced, and if the depth of the oil drainage groove is too shallow, pollutant deposition can be caused after the oil drainage groove is ground to be flat, and the accuracy of temperature measurement can be influenced.
Although the prior art improves the traditional composite material bearing running temperature monitoring device, a more effective and reliable monitoring device is not provided all the time, so that the error of tile body temperature measurement is large, and accidents are easily caused by alarm lag. Therefore, the conventional device for measuring the temperature of the bearing shell of the hydropower station still adopts the traditional method for measuring the temperature by using the babbitt metal bearing shell.
SUMMERY OF THE UTILITY MODEL
According to the technical problem that the existing monitoring device cannot timely and accurately monitor the oil film temperature of the composite material thrust bearing, the error in the measurement of the temperature of a tile body is large, and accidents are easily caused due to the lag of alarming, and the device for monitoring the oil film temperature of the composite material thrust bearing on line is provided. The utility model discloses mainly through setting up oil film temperature sensor in oil film temperature highest point, its probe tip is only 1.5mm ~ 2mm from the combined material tile face, make oil film temperature sensor probe tip place in pressure oil film temperature highest point intra-area, it sets up U type draining groove to combine the combined material tile face, the degree of depth in U type draining groove has been stipulated, lubricating oil is to temperature monitoring's interference in having avoided the oil groove, thereby in time, accurately monitor combined material thrust bearing's oil film temperature, judge the running state of bearing, overcome the error that tile body temperature measurement caused, guarantee unit operation safety.
The utility model discloses a technical means as follows:
a device for monitoring the temperature of an oil film on line for a composite material thrust bearing comprises the composite material thrust bearing and an on-line oil film temperature monitoring assembly, wherein the composite material thrust bearing mainly comprises a tile base body and a composite material tile surface arranged on the tile base body; the composite material thrust bearing is provided with a tapered step-shaped mounting hole for mounting the on-line oil film temperature monitoring assembly, the mounting hole penetrates through the tile base body and the composite material tile surface, the axis of the mounting hole is perpendicular to the composite material tile surface and is arranged at the highest position of the oil film temperature of the composite material thrust bearing, and the highest position of the oil film temperature of the composite material thrust bearing is determined according to the calculation result of finite element analysis software;
the composite tile surface is provided with a U-shaped oil drainage groove in the horizontal direction, the U-shaped oil drainage groove is communicated with the mounting hole and accommodates an orifice at the top of the mounting hole on the composite tile surface, the circular arc axis at one side of the U-shaped oil drainage groove is superposed with the axis of the mounting hole, the circle center of the circular arc is positioned on the axis of the mounting hole, and the opening at the other side of the U-shaped oil drainage groove faces an oil outlet edge;
the online oil film temperature monitoring assembly comprises an oil film temperature sensor and a sensor heat insulation sleeve sleeved outside a probe of the oil film temperature sensor, the inner diameter of the sensor heat insulation sleeve is matched with the outer diameter of the probe of the oil film temperature sensor, the end part of the probe of the oil film temperature sensor is flush with the end face of the sensor heat insulation sleeve, and the outer diameter of the sensor heat insulation sleeve is matched with the inner diameter of the mounting hole;
the middle part of the oil film temperature sensor is provided with a threaded section, and the threaded section is coated with an oxygen-resistant sealant to ensure that the oil film temperature sensor is completely filled in a gap between an external thread of the threaded section and an internal thread of a threaded hole, so that the looseness of the sensor and the leakage of lubricating oil caused by long-time impact and vibration can be avoided;
the flange end face of the oil film temperature sensor is tightly attached to the step in the mounting hole, so that the pressure relief phenomenon caused by the infiltration of lubricating oil can be prevented. The flange end face of the oil film temperature sensor refers to the end face of the threaded section, namely the end face connected with the probe in the threaded section.
Furthermore, the diameter of the oil film temperature sensor probe is less than or equal to 3 mm.
Furthermore, the end part of the probe of the oil film temperature sensor is lower than the top of the tile surface of the composite material, the distance between the end part of the probe of the oil film temperature sensor and the top of the tile surface of the composite material is 1.5-2 mm, and the end part of the probe of the oil film temperature sensor is arranged in a region with the highest pressure oil film temperature, so that the highest oil film temperature of the thrust bearing of the composite material can be timely and accurately monitored, and the running safety of a unit is guaranteed.
Furthermore, the thread section of the oil film temperature sensor adopts a sealing pipe thread with sealing capacity, connection tightness is guaranteed by means of deformation of thread teeth, and the oil film temperature sensor has a good sealing effect.
Furthermore, the mounting hole with the tapered ladder shape is formed by communicating a tapered second through hole, a threaded hole and a first through hole, and the second through hole is used for accommodating a bottom nut on the oil film temperature sensor; the internal thread of the threaded hole is matched and connected with the external thread of the threaded section, and the coated oxygen-resistant sealant is completely filled in a gap between the external thread of the threaded section and the internal thread of the threaded hole; the first through hole is in clearance fit with the outer diameter of the heat insulation sleeve of the sensor, wherein the diameter of the first through hole is less than or equal to 4mm, so that the tile surface of the composite material can be damaged negligibly, and the continuity of a pressure oil film cannot be influenced.
Further, the radius of the arc on one side of the U-shaped oil drainage groove is larger than that of the first through hole, and the difference between the radius of the arc and the radius of the first through hole is 0.5-10 mm.
Furthermore, the height from the bottom of the U-shaped oil drainage groove to the top of the tile surface made of the composite material is 0.1-0.2 mm, so that the interference of lubricating oil in the U-shaped oil drainage groove on temperature monitoring can be avoided.
Compared with the prior art, the utility model has the advantages of it is following:
1. the utility model provides a device of combined material thrust bearing on-line monitoring oil film temperature because oil film temperature sensor sets up in oil film temperature highest point, and oil film temperature sensor probe tip only 1.5mm ~ 2mm apart from combined material tile face, makes oil film temperature sensor probe tip place in pressure oil film temperature highest point intra-area, consequently can be in time, accurately monitor combined material thrust bearing's the highest oil film temperature, guarantee unit operation safety.
2. The utility model provides a device of combined material thrust bearing on-line monitoring oil film temperature, oil film temperature sensor probe are equipped with dedicated sensor radiation shield, only utilize oil film temperature sensor probe tip to carry out oil film temperature monitoring, reduce the influence of a small amount of lubricating oil to monitoring data in the mounting hole.
3. The utility model provides a device for online monitoring of oil film temperature of composite material thrust bearing, the thread section of the oil film temperature sensor adopts the thread of the sealing pipe, the tightness of connection is ensured by the deformation of the thread teeth, and the sealing function is good; in addition, the oil film temperature sensor is coated with enough oxygen-resistant sealant on the screw thread in advance before installation, so that the looseness of the sensor and the leakage of lubricating oil caused by long-time impact and vibration are avoided; meanwhile, the flange end face of the oil film temperature sensor is tightly attached to the step in the mounting hole, so that the pressure relief phenomenon caused by the infiltration of lubricating oil is prevented.
4. The utility model provides a device of combined material thrust bearing on-line monitoring oil film temperature has stipulated that the drill way size at the mounting hole top of processing on the combined material tile face needs less than or equal to 4mm, can ignore the destruction of combined material tile face, can not influence the continuity of pressure oil film.
5. The utility model provides a device for online monitoring of oil film temperature of composite material thrust bearing, the composite material tile surface is provided with a U-shaped oil drainage groove, so that the phenomenon that the tile surface is damaged due to lubricating oil being trapped in a hole reserved above the probe end part of a temperature sensor is prevented; meanwhile, the U-shaped oil drainage channel is beneficial to the circulation of lubricating oil at the probe end part of the oil film temperature sensor, and the accumulation of impurities is prevented, so that the accuracy of oil film temperature monitoring data is ensured; the depth of the U-shaped oil drainage groove is specified, so that the interference of lubricating oil in the U-shaped oil drainage groove on temperature monitoring is avoided; in addition, when the unit overhauls, can judge the bearing degree of wear through observing the degree of depth change in U type draining groove.
To sum up, use the technical scheme of the utility model the current monitoring devices that can solve among the prior art can't be in time, accurately monitor combined material thrust bearing's oil film temperature, lead to tile body temperature measurement error big, to making the problem that the warning lags easily to cause the accident.
Based on the reason above-mentioned the utility model discloses can extensively promote in fields such as bearing oil film temperature measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a composite material thrust bearing temperature measurement assembly in the prior art.
Fig. 2 is a schematic structural diagram of a second composite material thrust bearing temperature measurement assembly in the prior art.
FIG. 3 is a schematic structural diagram of a third composite material thrust bearing temperature measurement assembly in the prior art.
FIG. 4 is a schematic structural diagram of a fourth composite material thrust bearing temperature measurement assembly in the prior art.
Fig. 5 is a schematic structural view of the temperature measuring assembly of the composite material thrust bearing of the present invention.
Fig. 6 is a split view of the temperature measuring assembly of the composite material thrust bearing of the present invention.
Fig. 7 is the utility model discloses well simulation hydroelectric set operating mode test temperature monitoring curve graph.
In the figure: 1. a tile base; 2. a composite tile face; 3. an oil film temperature sensor; 31. a probe; 32. a flange end face; 33. a threaded segment; 34. a nut; 4. a sensor heat shield sleeve; 5. mounting holes; 51. a first through hole; 52. a threaded hole; 53. a second through hole; 6. u type draining groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 5-6, the utility model provides a device for online monitoring of oil film temperature of composite material thrust bearing, which comprises a composite material thrust bearing and an online monitoring oil film temperature component, wherein the composite material thrust bearing mainly comprises a tile base body 1 and a composite material tile surface 2 arranged on the tile base body 1; the composite material thrust bearing is provided with a tapered stepped mounting hole 5 for mounting an on-line oil film temperature monitoring assembly, the mounting hole 5 penetrates through the tile base body 1 and the composite material tile surface 2, the axis of the mounting hole 5 is perpendicular to the composite material tile surface 2 and is arranged at the highest position of the oil film temperature of the composite material thrust bearing, and the highest position of the oil film temperature of the composite material thrust bearing is determined according to a finite element analysis software calculation result. The mounting hole 5 with the tapered step shape is that the mounting hole 5 is provided with a tapered second through hole 53, a threaded hole 52 and a first through hole 51 which are communicated with each other, and the second through hole 53 is used for accommodating the bottom nut 34 on the oil film temperature sensor 3; the internal thread of the threaded hole 52 is matched and connected with the external thread of the threaded section 33, and the coated oxygen-resistant sealant is completely filled in a gap between the external thread of the threaded section 33 and the internal thread of the threaded hole 52. The first through hole 51 is in clearance fit with the outer diameter of the sensor heat insulation sleeve 4, wherein the diameter of the first through hole 51 is less than or equal to 4mm, so that the damage to the composite material tile surface 2 can be ignored, and the continuity of a pressure oil film cannot be influenced.
The composite tile surface 2 is provided with a U-shaped oil drainage groove 6 in the horizontal direction, the U-shaped oil drainage groove 6 is communicated with the mounting hole 5, the orifice at the top of the mounting hole 5 on the composite tile surface 2 is contained, the circular arc axis on one side of the U-shaped oil drainage groove 6 coincides with the axis of the mounting hole 5, the circle center of the circular arc is located on the axis of the mounting hole 5, and the opening on the other side of the U-shaped oil drainage groove 6 faces towards the oil outlet edge. The radius of the circular arc on one side of the U-shaped oil drainage groove 6 is larger than the radius of the first through hole 51, and the difference between the radius of the circular arc and the radius of the first through hole 51 is 0.5-10 mm. The height from the bottom of the U-shaped oil drainage groove 6 to the top of the tile surface 2 made of the composite material is 0.1-0.2 mm, and the interference of lubricating oil in the U-shaped oil drainage groove 6 on temperature monitoring can be avoided.
On-line monitoring oil film temperature subassembly includes that oil film temperature sensor 3 and cover establish at the outside sensor radiation shield 4 of 3 probes 31 of oil film temperature sensor, and oil film temperature sensor 3 divide into the three, follows upwards to be in proper order down: a nut 34 at the bottom end, a threaded section 33 in the middle, and a probe 31 above. The inner diameter of the sensor heat insulation sleeve 4 is matched with the outer diameter of the probe 31 of the oil film temperature sensor 3, the end part of the probe 31 of the oil film temperature sensor 3 is flush with the end face of the sensor heat insulation sleeve 4, and the outer diameter of the sensor heat insulation sleeve 4 is matched with the inner diameter of the mounting hole 5. After the oil film temperature sensor 3 and the sensor heat insulation sleeve 4 special for the sensor are assembled, the oil film temperature sensor and the sensor heat insulation sleeve are fixed in the mounting hole 5 together. The diameter of the probe 31 of the oil film temperature sensor 3 in the embodiment is less than or equal to 3 mm. The end part of the probe 31 of the oil film temperature sensor 3 is lower than the top of the composite material tile surface 2, the distance between the end part of the probe 31 of the oil film temperature sensor 3 and the top of the composite material tile surface 2 is 1.5 mm-2 mm, and on the premise of avoiding the contact between the end part of the probe 31 of the oil film temperature sensor 3 and the mirror plate, the end part of the probe 31 of the oil film temperature sensor 3 is ensured to be positioned at the highest position of the pressure oil film temperature, so that the highest oil film temperature of the composite material thrust bearing is timely and accurately monitored, and the running safety of a.
The middle part of the oil film temperature sensor 3 is provided with the thread section 33, and the oil film temperature sensor 3 is uniformly coated with enough oxygen-resistant sealant on the thread section 33 before installation, so that the oil film temperature sensor is ensured to be completely filled in a tiny gap between the external thread of the thread section 33 and the internal thread of the thread hole 52, and the looseness of the sensor and the leakage of lubricating oil caused by long-time impact and vibration can be avoided. The thread section 33 of the oil film temperature sensor 3 adopts a sealing pipe thread with sealing capacity, connection tightness is guaranteed by means of deformation of thread teeth, and the oil film temperature sensor has a good sealing effect.
The flange end face 32 of the oil film temperature sensor 3 is tightly attached to the step in the mounting hole 5, so that the pressure relief phenomenon caused by the infiltration of lubricating oil can be prevented.
Example 2
On the basis of embodiment 1, the utility model also provides a method of combined material thrust bearing on-line monitoring oil film temperature, including following step:
s1, sleeving the sensor heat insulation sleeve 4 outside the probe 31 of the oil film temperature sensor 3;
s2, uniformly coating enough oxygen-resistant sealant on the threaded section 33 of the oil film temperature sensor 3 to ensure that the sealant is completely filled in a tiny gap between the external thread of the threaded section 33 and the internal thread of the threaded hole 52;
s3, before the anti-oxidation sealant is solidified, screwing the online oil film temperature monitoring assembly into the threaded hole 52 of the mounting hole 5, locking the threads, and solidifying the sealant into a tough solid to prevent the threads from moving so that the assembly is firmly fixed in the bearing; when the oil film temperature sensor is installed, the flange end face 32 of the oil film temperature sensor 3 is tightly attached to a step between the first through hole 51 and the threaded hole 52 in the installation hole 5, and lubricating oil is prevented from permeating;
s4, installing the composite material bearing and the online oil film temperature monitoring assembly in a unit, fixing a cable of the oil film temperature sensor 3 along the bottom of an oil tank of the unit by a fixing wire clamp, leading out from an outlet of the oil tank of the unit, entering a signal acquisition module, processing the signal by a photoelectric conversion signal, and transmitting the signal to a programmable controller for temperature storage and analysis;
and S5, starting the unit, operating at a certain rotating speed and under a certain load condition, measuring a sensor signal in real time by the oil film temperature sensor 3, and displaying the analyzed data in real time on the upper computer.
Example 3
The method comprises the following steps of utilizing a composite material thrust bearing and a composite material thrust bearing oil film temperature detection assembly to perform online monitoring of oil film temperature on a simulated hydroelectric generating set working condition test unit, wherein the process comprises the following steps:
s1, sleeving the sensor heat insulation sleeve 4 outside the probe 31 of the PT100 temperature sensor;
s2, uniformly coating enough oxygen-resistant sealant on the temperature sensor threaded section 33 to ensure that the sealant is completely filled in a tiny gap between the external thread of the threaded section 33 and the internal thread of the threaded hole 52;
s3, before the anti-oxidation sealant is solidified, screwing the on-line oil film temperature monitoring component into the bearing mounting hole 5, namely screwing the threaded section 33 of the oil film temperature sensor 3 into the threaded hole 52 of the mounting hole 5 through the nut 34 of the oil film temperature sensor 3, locking the threads, and solidifying the sealant into a tough solid to prevent the threads from moving so that the component is firmly fixed in the bearing; when the oil film temperature sensor is installed, the flange end face 32 of the oil film temperature sensor 3 is tightly attached to a step between the first through hole 51 and the threaded hole 52 in the installation hole 5, and lubricating oil is prevented from permeating; wherein the distance from the head of the oil film temperature sensor 3 to the top of the composite material tile surface 2 (namely the depth of the oil film temperature sensor 3) is 1.7mm, and the height from the bottom of the U-shaped oil drainage groove 6 to the top of the composite material tile surface 2 (namely the depth of the U-shaped oil drainage groove 6) is 0.2 mm;
s4, installing the composite material bearing and the online oil film temperature monitoring assembly in a unit, fixing a cable of the oil film temperature sensor 3 along the bottom of an oil tank of the unit by a fixing wire clamp, leading out from an outlet of the oil tank of the unit, entering a signal acquisition module, processing the signal by a photoelectric conversion signal, and transmitting the signal to a programmable controller for temperature storage and analysis;
and S5, operating the testing unit, wherein the rotating speed of the testing table is 600r/min, the bearing pressure is 4MPa, after the operation is stable, increasing the rotating speed to 700r/min, observing the oil film temperature and the tile body temperature of the tile, and recording temperature data (shown in table 1) after the operation of the acquisition system is stable to obtain a temperature monitoring curve (shown in figure 7).
As can be seen from the temperature monitoring curve chart of fig. 7, when the rotation speed suddenly increases, the temperature of the tile body slowly increases, and the change is not obvious in a short time; the oil film temperature can rise rapidly within 2 minutes, the temperature rise can reach 2 ℃, and the reaction is rapid, so that the problem of lagging alarm temperature of a unit can be solved by monitoring the oil film temperature on line. In addition, the temperature difference between the oil film temperature and the tile body temperature can reach about 25 ℃, and the high precision and sensitivity of the oil film temperature monitoring assembly are reflected.
TABLE 1 oil film temperature data table for orthogonal test with rotation speed of 600r/min and load of 4MPa
As can be seen from the data in table 1, the embodiments of the present invention achieve the following technical effects: the oil film temperature of the composite material thrust bearing is accurately and timely monitored, and the problem of temperature monitoring lag is solved, so that the tile burning accident is effectively prevented; simple structure and convenient installation. When the depth of the U-shaped oil drainage groove 6 and the depth of the sensor exceed the measuring size range, the measuring result can generate errors, namely the depth of the U-shaped oil drainage groove 6 exceeds 0.2mm, and when the depth of the oil film temperature sensor 3 exceeds 2mm, the measuring result can generate errors. The purpose of U type draining groove 6 is in order to get rid of impurity and pile up, avoids measuring inaccurately, and when its degree of depth exceeded 0.2mm, can cause the contact with cold oil, makes temperature measurement inaccurate, produces the error.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (7)
1. The device for monitoring the oil film temperature of the composite material thrust bearing on line comprises the composite material thrust bearing and an on-line oil film temperature monitoring assembly, and is characterized in that the composite material thrust bearing mainly comprises a tile base body (1) and a composite material tile surface (2) arranged on the tile base body (1); the composite material thrust bearing is provided with a tapered stepped mounting hole (5) for mounting the oil film temperature online monitoring assembly, the mounting hole (5) penetrates through the tile base body (1) and the composite material tile surface (2), the axis of the mounting hole (5) is perpendicular to the composite material tile surface (2) and is arranged at the highest position of the oil film temperature of the composite material thrust bearing, and the highest position of the oil film temperature of the composite material thrust bearing is determined according to the calculation result of finite element analysis software;
a U-shaped oil drainage groove (6) is formed in the composite tile surface (2) in the horizontal direction, the U-shaped oil drainage groove (6) is communicated with the mounting hole (5) and accommodates an orifice at the top of the mounting hole (5) on the composite tile surface (2), an arc axis on one side of the U-shaped oil drainage groove (6) is overlapped with an axis of the mounting hole (5), and an opening on the other side of the U-shaped oil drainage groove (6) faces an oil outlet edge;
the online oil film temperature monitoring assembly comprises an oil film temperature sensor (3) and a sensor heat insulation sleeve (4) sleeved outside a probe (31) of the oil film temperature sensor (3), the inner diameter of the sensor heat insulation sleeve (4) is matched with the outer diameter of the probe (31) of the oil film temperature sensor (3), the end part of the probe (31) of the oil film temperature sensor (3) is flush with the end face of the sensor heat insulation sleeve (4), and the outer diameter of the sensor heat insulation sleeve (4) is matched with the inner diameter of the mounting hole (5);
a threaded section (33) is arranged in the middle of the oil film temperature sensor (3), and an oxygen-resistant sealant is coated on the threaded section (33);
and the flange end face (32) of the oil film temperature sensor (3) is tightly attached to the step in the mounting hole (5).
2. The device for online monitoring of oil film temperature of composite material thrust bearing according to claim 1, wherein diameter of probe (31) of oil film temperature sensor (3) is less than or equal to 3 mm.
3. The device for online monitoring of the oil film temperature of the composite material thrust bearing according to claim 1 or 2, wherein the end of the probe (31) of the oil film temperature sensor (3) is lower than the top of the composite material pad surface (2), and the distance between the end of the probe (31) of the oil film temperature sensor (3) and the top of the composite material pad surface (2) is 1.5 mm-2 mm.
4. The device for online monitoring of oil film temperature of composite material thrust bearing according to claim 3, characterized in that the threaded section (33) of the oil film temperature sensor (3) is a sealed pipe thread with sealing capability.
5. The device for online monitoring of oil film temperature of a composite material thrust bearing according to claim 1, wherein the mounting hole (5) with the tapered step shape is characterized in that the mounting hole (5) is provided with a tapered second through hole (53), a threaded hole (52) and a first through hole (51) which are communicated with each other, and the second through hole (53) is used for accommodating a bottom nut (34) on the oil film temperature sensor (3); the internal thread of the threaded hole (52) is matched and connected with the external thread of the threaded section (33), and the coated oxygen-resistant sealant is completely filled in a gap between the external thread of the threaded section (33) and the internal thread of the threaded hole (52); the first through hole (51) is in clearance fit with the outer diameter of the sensor heat insulation sleeve (4), wherein the diameter of the first through hole (51) is less than or equal to 4 mm.
6. The device for online monitoring of oil film temperature of composite material thrust bearing according to claim 5, wherein the radius size of the circular arc at one side of the U-shaped oil drainage groove (6) is larger than the radius size of the first through hole (51), and the difference between the radius of the circular arc and the radius of the first through hole (51) is 0.5 mm-10 mm.
7. The device for online monitoring of oil film temperature of composite material thrust bearing according to claim 6, wherein the height from the bottom of the U-shaped oil drainage groove (6) to the top of the composite material tile surface (2) is 0.1-0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922067139.9U CN210893474U (en) | 2019-11-26 | 2019-11-26 | Device for online monitoring oil film temperature of composite material thrust bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922067139.9U CN210893474U (en) | 2019-11-26 | 2019-11-26 | Device for online monitoring oil film temperature of composite material thrust bearing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715753A (en) * | 2019-11-26 | 2020-01-21 | 大连三环复合材料技术开发股份有限公司 | Device and method for online monitoring of oil film temperature of composite material thrust bearing |
| CN112798139A (en) * | 2020-12-23 | 2021-05-14 | 成都伊莱特光测科技有限公司 | Hydroelectric set axle bush temperature detection optical fiber sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715753A (en) * | 2019-11-26 | 2020-01-21 | 大连三环复合材料技术开发股份有限公司 | Device and method for online monitoring of oil film temperature of composite material thrust bearing |
| CN110715753B (en) * | 2019-11-26 | 2024-08-06 | 大连三环复合材料技术开发股份有限公司 | Device and method for online monitoring of oil film temperature of composite thrust bearing |
| CN112798139A (en) * | 2020-12-23 | 2021-05-14 | 成都伊莱特光测科技有限公司 | Hydroelectric set axle bush temperature detection optical fiber sensor |
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