A high temperature bearing test heating method and apparatus based on a quartz lamp focusing array

Abstract

The application provides a high-temperature bearing test heating method and device based on a quartz lamp focusing array, and belongs to the technical field of high-temperature bearing test. The optical focusing is realized by cooperation of the reflector body, the quartz lamp heating element and the Fresnel lens, the local precise heating and regulation of the test piece are realized by the optical focusing technology, the quartz lamp heating assembly installed on the annular mounting disc body can greatly improve the bearing heating efficiency, the angle of the heating assembly can be adjusted, and the bearing has good adaptability to different heating requirements. The application comprises a heating unit assembly, the bottom of the heating unit assembly is provided with an angle adjusting assembly, and the heating unit assembly comprises a heat insulation box body and a reflector body, a quartz lamp heating element and a Fresnel lens arranged in the heat insulation box body; the reflector body is located at the rear side of the quartz lamp heating element, the Fresnel lens is located at the front side of the quartz lamp heating element, and lens support shafts are fixedly installed on both sides of the Fresnel lens.

Description

Technical Field

[0001] This invention relates to a heating method and apparatus for high-temperature bearing testing based on a quartz lamp focusing array, specifically belonging to the field of high-temperature bearing testing technology. Background Technology

[0002] Bearings are an important component of key parts such as aero engines and turbines. With the rapid development of high-speed aircraft and related supporting equipment technology, they face complex working environments with high speed, large load, and high temperature, which puts forward more stringent requirements for the testing and experimental equipment of related bearing products. Radiation heating method has good engineering application advantages and has been applied as a standalone thermal load method in high-temperature bearing testing. Publication number "CN111405691A" describes a high-temperature heating device for bearings. It includes a frame, support blocks, a width adjustment device, and a lifting device. At least two support blocks are evenly distributed on the top of the frame, and a width adjustment device that adjusts the width by rotation is located in the middle of the frame. The width adjustment device is equipped with a lifting device that also adjusts the height by rotation. Through the cooperation of the width adjustment device and the lifting device, this device can drive the high-temperature flame gun to rotate while pushing it downwards, allowing the high-temperature flame gun to heat the bearing evenly. The heating methods of high-temperature flame guns are time-consuming and inefficient, which cannot meet the requirements of variable temperature design. Other heating methods include oil bath heating and resistance wire induction heating. Oil bath heating requires preheating of oil, which is energy-intensive and slow to heat up. Induction heating involves placing resistance wire heating elements in a closed heating chamber to heat the chamber environment, thereby applying thermal load to the high-temperature bearing elements arranged inside the chamber. This method is time-consuming, inefficient, and the heating environment has high thermal inertia, making it difficult to control. Summary of the Invention

[0003] The purpose of this invention is to provide a high-temperature bearing testing heating method and device based on a quartz lamp focusing array, so as to achieve the goals of fast response, large heat output, and high adaptability in high-temperature bearing testing heating.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: the invention includes a heating unit assembly, an angle adjustment assembly is provided at the bottom of the heating unit assembly, and the heating unit assembly includes a heat insulation box body and a reflector body, a quartz lamp heating element and a Fresnel lens disposed inside it; The reflector body is located behind the quartz lamp heating element, and the Fresnel lens is located in front of the quartz lamp heating element. Lens support shafts are fixedly installed on both sides of the Fresnel lens, and a lens support frame is rotatably connected to the outside of the lens support shaft. The bottom end of the lens support frame is fixedly connected to the wall of the housing.

[0005] The angle adjustment assembly includes an angle rotation frame, a heating device rotation shaft, an angle rotation frame fixing platform, and an annular mounting plate mounting platform; A heating device rotating shaft is fixedly connected to the bottom of the heat insulation box body. An angle rotating frame is rotatably connected to the heating device rotating shaft. An angle rotating frame fixing platform is fixedly connected to the bottom end of the angle rotating frame. An annular mounting plate mounting platform is fixedly connected to the bottom surface of the angle rotating frame fixing platform. The annular mounting plate mounting platform is fixedly installed on the top surface of the annular mounting plate body. Furthermore, by controlling the rotating shaft of the heating device, the rotation angle of the heat insulation box body can be controlled, and by adjusting the angle of the heat insulation box body, the heating distance of the bearing and the heating area can be controlled.

[0006] The wall material of the box is heat insulation cotton, and the upper side of the rear wall of the box has a heat insulation box water flow hole, and the lower side of the rear wall of the box has a heat insulation box water flow hole. The heat insulation box water flow hole is set to the corresponding reflector water outlet, and the heat insulation box water flow hole is set to the corresponding reflector water inlet. Furthermore, this serves to insulate against heat and protect external devices and personnel.

[0007] The reflector body has an overall side profile in the shape of an arc parabola. The quartz lamp heating element is located at the focus of the parabola of the reflector body. The quartz lamp heating element consists of an inner tungsten filament and an outer quartz lamp body. Furthermore, inert gases such as nitrogen are filled into the quartz lamp to prevent the tungsten filament from oxidizing. The aluminum alloy reflector body has low transmittance and high reflectance, and its surface can fully reflect the electromagnetic waves emitted by the heating element of the quartz lamp. The coating material is gold with high reflectance, which can achieve the purpose of efficient utilization of electromagnetic waves. In addition, the cooling water flow adopts the "bottom in, top out" model, flowing in from the water inlet of the lower reflector and flowing out from the water outlet of the upper reflector to achieve the purpose of sufficient cooling.

[0008] Heating unit components are provided at equal angles on the top surface of the annular mounting plate body, and current collection grooves are provided at equal angles on the top surface of the annular mounting plate body, with the current collection grooves located on the outside of the heat insulation box body. Furthermore, a ring-shaped mounting plate is used as the basic frame. The ring-shaped mounting plate is equipped with a heating device mounting platform, a current busbar, and tooling for mounting the bearing under test in an inner hole area. The ring-shaped mounting plate also integrates a temperature measurement unit and a control system interface for easy real-time monitoring. The high-temperature bearing testing heating method uses a quartz lamp heating element to generate a portion of the electromagnetic waves as a "primary light source," which is focused after passing through a Fresnel lens. Another portion of the electromagnetic waves generated by the quartz lamp heating element is a "secondary light source," which is reflected by the reflector body, becoming parallel electromagnetic waves. These parallel waves then converge with the "primary light source" after passing through the Fresnel lens. Optical focusing technology is used to precisely heat and control the bearing in a localized manner. Furthermore, the quartz lamp heating elements are evenly distributed along the circumference of the annular mounting plate, and the rotation adjustment is ±15° through the angle adjustment device to adapt to different bearing sizes and heating area requirements. The number of heating components can be adjusted according to the inner and outer ring sizes of the bearing and the heating power. Furthermore, it can achieve rapid heating or cooling to meet the needs of variable temperature testing.

[0009] The beneficial effects of this invention are: 1. Based on the collaborative design of "optical focusing - mechanical focusing", a portion of the electromagnetic waves generated by the energized quartz lamp heating element is the "primary light source". After being focused by a Fresnel lens, another portion of the electromagnetic waves generated by the energized quartz lamp heating element is the "secondary light source". The electromagnetic waves generated at the focal point of the parabolic reflector are reflected into parallel electromagnetic waves by the reflector body with a parabolic structure. After being focused by a Fresnel lens, they converge with the "primary light source". Through optical focusing technology, localized and precise heating and control of the heated specimen can be achieved. The quartz lamp heating component installed on the annular mounting plate can significantly improve the heating efficiency of the bearing and can adjust the angle of the heating component, which has good adaptability to different heating requirements of the bearing.

[0010] 2. By using the annular mounting plate as the basic frame, the annular mounting plate is equipped with a heating device mounting platform, a current busbar, and a tooling for mounting the bearing under test in the inner hole area. The annular array design improves heating uniformity; the modular components enhance the adaptability of the device; the annular mounting plate also integrates a temperature measurement unit and a control system interface for easy real-time monitoring.

[0011] 3.12 quartz lamp heating components are evenly distributed along the circumference of the annular mounting plate. The heating device can be rotated ±15° via a rotating shaft to accommodate different bearing sizes and heating area requirements. The number of heating components can be adjusted according to the inner and outer ring sizes of the bearings and the heating power.

[0012] 4. By using thermal insulation cotton for the casing walls and providing a cooling channel within the reflector body, the stability and thermal isolation of the device are ensured. The device is designed for an open environment, which avoids the thermal inertia problem caused by a sealed cavity and improves the response speed of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the thermal focusing principle of the quartz lamp heating of this invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the device of the present invention; Figure 3 This is a top view of the overall structure of the device of the present invention; Figure 4 This is a schematic diagram of the front section structure of the heat insulation box of the present invention; Figure 5 This is a side sectional view of the heat insulation box of the present invention; Figure 6 This is a top view of the structure of the heat insulation box of the present invention.

[0014] 1. Annular mounting plate; 2. Insulation box body; 3. Angle rotation frame; 4. Current manifold; 5. Box temperature thermocouple; 6. Upper water outlet of the insulation box; 7. Lower water outlet of the insulation box; 8. Box wall; 9. Lens support frame; 10. Lens support shaft; 11. Reflector outlet; 12. Fresnel lens; 13. Reflector body; 14. Reflector cooling channel; 15. Quartz lamp heating element; 16. Reflector support frame; 17. Reflector inlet; 18. Heating device rotating shaft; 19. Angle rotation frame fixing platform; 20. Annular mounting plate mounting platform; 21. Quartz lamp body; 22. Bearing. Detailed Implementation

[0015] The following will be combined with the appendix Figure 1-6 The technical solutions in the embodiments are described clearly and completely.

[0016] Specific implementation method one: as follows Figure 1-3 As shown, the device as a whole includes an annular mounting plate body 1 and 12 heat insulation box bodies 2 arranged at equal angles on its top surface. An angle adjustment component is provided between the annular mounting plate body 1 and the 12 heat insulation box bodies 2 to facilitate subsequent adjustment of the heating unit components. The angle adjustment assembly includes a heating device rotating shaft 18, an angle rotating frame 3, an angle rotating frame fixing platform 19, and an annular mounting plate mounting platform 20. The heating device rotating shaft 18 is fixedly connected to the bottom of the heat insulation box body 2. The angle rotating frame 3 is damped and rotatably connected to the outside of the heating device rotating shaft 18. The angle rotating frame fixing platform 19 is fixedly connected to the bottom end of the angle rotating frame 3. The annular mounting plate mounting platform 20 is fixedly connected to the bottom surface of the angle rotating frame fixing platform 19. The annular mounting plate mounting platform 20 is fixedly installed on the top surface of the annular mounting plate body 1. By controlling the heating device rotating shaft 18, the rotation angle of the heat insulation box body 2 can be controlled. By adjusting the angle of the heat insulation box body 2, the heating distance and heating area of ​​the bearing 22 can be controlled. The top surface of the annular mounting plate body 1 is provided with six current busbars 4 at equal angles. The current busbars 4 are located on the outside of the heat insulation box body 2. The electrical devices arranged in the current busbars 4 realize regional heat control, which effectively improves the heat application efficiency of bearing test. The inner hole of the annular mounting plate body 1 can be used to arrange the mounting fixtures of the heated test piece. At the same time, the temperature measuring unit and control system modules can be arranged on the top surface of the annular mounting plate body 1. The device is arranged in an open environment, which can avoid the thermal inertia problem caused by the sealed cavity and improve the response speed of the device. Specific implementation method two: such as Figure 4-6As shown, the heating unit assembly includes a reflector body 13, a quartz lamp heating element 15, and a Fresnel lens 12. The reflector body 13 is located behind the quartz lamp heating element 15. The inner surface of the reflector body 13 is coated with a gold material. The reflector body 13 is made of aluminum alloy, and its overall side profile is an arc-shaped parabola. The reflector body 13 completely covers the quartz lamp heating element 15, which is located at the focal point of the parabola. The quartz lamp heating element 15 consists of an inner tungsten filament and an outer quartz lamp body 21. The quartz lamp body 21 is filled with inert gases such as nitrogen to prevent oxidation of the tungsten filament. The Fresnel lens 12 is located in front of the quartz lamp heating element 15. Twelve quartz lamp heating elements are combined to form a quartz lamp heating array. The reflective surface of the reflector body 13 facing the quartz lamp heating array is gold-plated to improve electromagnetic wave reflection efficiency and divert the emitted infrared radiation. Light focusing achieves concentrated heat, with the focal point aligned with the part of the bearing 22 to be heated. The diameter of the focused light spot can be changed by adjusting the relative position of the quartz lamp array and the reflector body 13. The model of the quartz lamp body 21, the number of quartz lamp heating elements, and the heating power of the quartz lamp heating array are adjusted according to the inner and outer ring dimensions of the bearing 22 and the heating requirements. The heating angle and heating range of the quartz lamp heating element 15 can be adjusted by the angle adjustment device. The heating electrode of the quartz lamp heating element 15 is treated with high-temperature resistant aerogel for heat insulation. Lens support shafts 10 are fixedly installed on both sides of the Fresnel lens 12. A lens support frame 9 is rotatably connected to the outside of the lens support shaft 10. The bottom end of the lens support frame 9 is fixedly connected to the box wall 8. The Fresnel lens 12 can be moved and focused along the optical axis. At the same time, different Fresnel lens 12 models with different focal lengths can be replaced according to the heating requirements and the model of the quartz lamp body 21. It can also be rotated ±15° around the horizontal axis to correct the optical path. The heating method for high-temperature bearing testing is as follows: A quartz lamp heating element 15 is energized to generate high-temperature heat, which releases thermo-electromagnetic waves outwards. Part of these waves pass forward through a Fresnel lens 12, where they are refracted to form a focused area, creating a "primary heat source" for the bearing 22. The other part of the waves travels backward to the reflector body 13, where they are reflected to form a parallel beam. This beam is then focused by the Fresnel lens 12 onto the heating area, creating a "secondary heat source" for the bearing 22. A coordinated design of optical focusing and mechanical focusing achieves precise local heating of the bearing 22. Optical focusing utilizes the thermo-electromagnetic waves emitted by the heated quartz lamp array. These waves are focused by a focusing unit composed of Fresnel lenses 12 to form a primary light source focused spot, which, in conjunction with the ellipsoidal reflector body 13, forms a reflection-transmission composite optical path. The divergent electromagnetic waves emitted by the quartz lamp are pre-focused into a parallel beam and then refocused by the lens into a Gaussian spot with a minimum diameter of 0.6 mm. This significantly improves the heating efficiency of the bearing 22. Specific Implementation Method 3: A thermocouple 5 for measuring the temperature of the heat insulation box body 2 is installed on the heat insulation box body 2 to realize the measurement and feedback of the temperature inside the heat insulation box body 2, thereby realizing the real-time control of the heating temperature of the quartz lamp heating array; a bearing thermocouple and an infrared thermal imager are symmetrically arranged radially on the surface of the bearing 22, with the temperature measuring end embedded in the axial center of the outer ring of the bearing 22. The average value is processed by the data acquisition device and used as the test value of the outer ring temperature of the bearing 22; the infrared thermal imager has a temperature measuring range of 1200℃ and a pixel resolution of 0.1mm. During the experiment, it can generate the surface temperature field distribution of the bearing 22 in real time, realizing non-contact acquisition of the bearing surface temperature; The casing wall 8 is made of heat insulation cotton, which serves to insulate heat and protect external equipment and personnel. The upper side of the rear wall of the casing 8 has a heat insulation box upper water flow hole 6, and the lower side of the rear wall of the casing 8 has a heat insulation box lower water flow hole 7. The reflector body 13 has a reflector cooling channel 14. The lower side of the reflector cooling channel 14 has a reflector water inlet 17, and the upper side of the reflector cooling channel 14 has a reflector water outlet 11. The heat insulation box upper water flow hole 6 and the heat insulation box lower water flow hole 7 are set to correspond to the reflector water inlet 17 and the reflector water outlet 11. The cooling water adopts the "bottom in, top out" mode, flowing in from the lower reflector water inlet 17 and flowing out from the upper reflector water outlet 11, so as to achieve the purpose of fully cooling the reflector body 13. The enclosure wall 8 can be perforated as needed to apply the thermal load required for bearing 22 testing. It can also be connected to external devices to implement single or combined loads such as load, noise, and vibration. The electrical control system and testing unit are strictly sealed at the contact points with the enclosure wall 8 to ensure the heating and insulation effect inside the heat insulation enclosure 2. Workflow: The bearing 22 to be tested is installed in the inner hole of the annular mounting plate body 1. Based on the size of the bearing 22 and the heating requirements such as temperature range and temperature change rate, the model of the quartz lamp body 21 and the focal length of the Fresnel lens 12 are selected. The rotation angle of each heat insulation box body 2 is controlled by controlling the rotating shaft 18 of the heating device, thereby controlling the heating distance and heating area of ​​the bearing 22. The heating power is controlled by the current busbar 4 in different areas to achieve local heat optimization, such as heating only the outer ring of the bearing. The electrical control system is activated, and the quartz lamp heating array is powered on. The thermo-electromagnetic waves are focused through the composite optical path to form a high-temperature light spot on the surface of bearing 22. The cooling system operates synchronously: water flows in from the reflector inlet 17, passes through the reflector cooling channel, and is discharged from the reflector outlet 11 to prevent overheating. By adjusting the power of the quartz lamp heating array and the position of the Fresnel lens in real time, rapid heating or cooling can be achieved to meet the requirements of variable temperature testing; and the device integrates bearing temperature measuring couplers and infrared thermal imagers to ensure that the heating process is precise and controllable. The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A high-temperature bearing testing heating device based on a quartz lamp focusing array, characterized in that, It includes a heating unit assembly, an angle adjustment assembly at the bottom of the heating unit assembly, and the heating unit assembly includes a heat insulation box body (2) and a reflector body (13), a quartz lamp heating element (15) and a Fresnel lens (12) disposed inside it. The reflector body (13) is located behind the quartz lamp heating element (15), and the Fresnel lens (12) is located in front of the quartz lamp heating element (15). Lens support shafts (10) are fixedly installed on both sides of the Fresnel lens (12). A lens support frame (9) is rotatably connected to the outside of the lens support shaft (10). The bottom end of the lens support frame (9) is fixedly connected to the box wall (8). The angle adjustment assembly includes an angle rotation frame (3), a heating device rotation shaft (18), an angle rotation frame fixing platform (19), and an annular mounting plate mounting platform (20). The bottom of the heat insulation box body (2) is fixedly connected to the heating device rotating shaft (18), the heating device rotating shaft (18) is rotatably connected to the angle rotating frame (3), the bottom end of the angle rotating frame (3) is fixedly connected to the angle rotating frame fixing platform (19), the bottom surface of the angle rotating frame fixing platform (19) is fixedly connected to the annular mounting plate mounting platform (20), and the annular mounting plate mounting platform (20) is fixedly installed on the top surface of the annular mounting plate body (1); A reflector cooling channel (14) is provided inside the reflector body (13). A reflector water inlet (17) is provided on the lower side of the reflector cooling channel (14), and a reflector water outlet (11) is provided on the upper side of the reflector cooling channel (14). The wall of the box (8) is made of heat insulation cotton, and the upper side of the rear wall of the box (8) is provided with a heat insulation box upper water flow hole (6), and the lower side of the rear wall of the box (8) is provided with a heat insulation box lower water flow hole (7). The heat insulation box upper water flow hole (6) is set to the corresponding reflector outlet (11), and the heat insulation box lower water flow hole (7) is set to the corresponding reflector inlet (17). Heating unit components are provided at equal angles on the top surface of the annular mounting plate body (1), and current confluence grooves (4) are provided at equal angles on the top surface of the annular mounting plate body (1). The current confluence grooves (4) are located outside the heat insulation box body (2).

2. The high-temperature bearing testing heating device based on a quartz lamp focusing array according to claim 1, characterized in that, The reflector body (13) has an overall side profile in the shape of an arc parabola. The quartz lamp heating element (15) is located at the focus of the parabola of the reflector body (13). The quartz lamp heating element (15) consists of an inner tungsten filament and an outer quartz lamp body (21).

3. The high-temperature bearing testing heating device based on a quartz lamp focusing array according to claim 1, characterized in that, A box temperature measuring thermocouple (5) is installed on the heat insulation box body (2), and a bearing temperature measuring thermocouple and an infrared thermal imager are symmetrically arranged on the bearing (22) surface along the radial direction.

4. A high-temperature bearing testing heating method based on a quartz lamp focusing array, characterized in that, In the application of the high-temperature bearing test heating device as described in any one of claims 1-3, a portion of the electromagnetic waves generated by the quartz lamp heating element (15) is a "primary light source," which is focused after passing through the Fresnel lens (12). Another portion of the electromagnetic waves generated by the quartz lamp heating element (15) is a "secondary light source," which is reflected by the reflector body (13) to reflect the electromagnetic waves into parallel electromagnetic waves. After passing through the Fresnel lens (12), the electromagnetic waves converge with the "primary light source," and the bearing (22) is locally and precisely heated and controlled through optical focusing technology.

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