Arrangement for determining surface temperature and method for manufacturing

Abstract

Arrangement for determining the surface temperature of a tooth section of a toothed part (9), in particular a tooth flank section of a tooth (7), comprising - the toothed part (9), having at least one tooth (7), - at least one temperature sensor, wherein the gear part (9) is rotatably mounted, characterized by the fact that the gear part (9) has a channel (3, 4) in which the temperature sensor is at least partially accommodated, wherein the channel (3, 4) opens at the surface of the toothing section, in particular the tooth flank section, wherein the arrangement includes a further rotatably mounted gear part (10), wherein the gear parts (9, 10) are connected to each other in a rotationally fixed manner and have a common axis of rotation, wherein the temperature sensor is arranged at least partially in the axial direction between the gear part (9) and the further gear part (10), in particular is connected to the gear parts (9, 10) by friction and / or form locking.

Description

[0001] The invention relates to an arrangement for determining the surface temperature and a method for its manufacture.

[0002] From DE 10 2007 039 702 A1 it is known to determine the surface temperature of a rotating part using an infrared temperature sensor.

[0003] EP 2 330 398 B1 discloses a method for testing a bearing pattern of gears in a gearbox in a steam turbine and a steam turbine system.

[0004] A planetary roller extruder is known from DE 198 15 303 C1.

[0005] DE 10 2006 013 907 A1 discloses a method and a device for determining the temperature of one or more friction elements of a friction connection.

[0006] DE 42 33 035 C1 discloses a temperature measuring device for a cutting tool.

[0007] From DE 1 698 080 A an arrangement for determining tool surface temperatures is known.

[0008] The invention is therefore based on the objective of further developing an arrangement for determining the surface temperature and a method for its manufacture, with the aim of improving safety.

[0009] According to the invention, the problem is solved in the arrangement for determining the surface temperature according to the features specified in claim 1 and in the method according to the features specified in claim 14.

[0010] Key features of the invention in the arrangement for determining the surface temperature of a tooth section of a toothed part, in particular a tooth flank section of a tooth, comprising - the toothed part, having at least one tooth, - at least one temperature sensor, where the gear part is rotatably mounted, are that the gear part has a channel in which the temperature sensor is at least partially accommodated, wherein the channel opens at the surface of the toothing section, in particular the tooth flank section.

[0011] An advantage of this method is that the surface temperature of the gear section can be measured locally. This allows for precise determination of the surface temperature while the gear part is rotating.

[0012] Advantageously, critical operating temperatures can be determined in this way. This prevents damage to the surface of the gear component by shutting it down before the critical temperature is reached.

[0013] Advantageously, the surface temperature of the gear section can be monitored during the manufacturing of the gear part. This allows manufacturing parameters such as milling speed to be optimized depending on the critical temperature of the gear part.

[0014] Another advantage is that the surface temperature of the rotating gear part in a housing can be determined.

[0015] Advantageously, the temperature of a lubricant, especially oil, can be determined at the surface of the gear section. This improves the lubricant's lifespan, as critical temperatures for the lubricant can be avoided.

[0016] In the embodiment according to the invention, the arrangement comprises a further rotatably mounted gear element, wherein the gear elements are rotationally fixed to one another and have a common axis of rotation, and wherein the temperature sensor is arranged at least partially in the axial direction between the gear element and the further gear element, in particular by frictional and / or positive locking connection to the gear elements. An advantage of this is that the temperature sensor can be reliably connected to the gear elements. A light-conducting contact between the temperature sensor and the gear elements can be established.

[0017] Advantageously, the temperature sensor is located inside the gear section. This allows the temperature sensor to be positioned at a distance from the friction surfaces of the gear section.

[0018] In an advantageous embodiment, the gearing element and the further gearing element each have a centering groove, in particular an annular centering groove, so that the gearing element and the further gearing element can be aligned relative to each other, wherein the gearing element and the further gearing element are positively connected to each other, in particular detachably connected, especially by means of a screw. It is advantageous that the axes of rotation of the gearing element and the further gearing element can be reliably aligned relative to each other in a simple manner.

[0019] In an advantageous embodiment, a gear composed of a toothed section and a further toothed section is finished, in particular ground and / or polished and / or lapped. It is advantageous that the multi-part, especially two-part, gear has uniform surfaces. This reduces friction.

[0020] In an advantageous embodiment, the channel is designed as a recess, in particular a groove, in the toothed part and / or the further toothed part. It is advantageous that the channel can be easily incorporated into the toothed part, in particular by milling and / or EDM.

[0021] In an advantageous embodiment, the channel comprises a first channel section and a second channel section, with the temperature sensor extending through both the first and second channel sections. An advantage of this design is that the temperature sensor can be guided within the gear section by means of the channel sections. This prevents excessive bending of the temperature sensor and improves safety.

[0022] In an advantageous embodiment, the first canal section extends along an axis, in particular the central axis, of the tooth. An advantage of this is that the mechanical strength of the tooth is maintained, and in particular remains unaffected by the canal.

[0023] In an advantageous embodiment, the tooth's teeth are symmetrical about the axis. The advantage here is that the central axis acts as the axis of symmetry for the tooth. This ensures that the tooth's strength remains unaffected by the channel.

[0024] In an advantageous embodiment, the second channel section extends at a non-zero angle to the first channel section. An advantage of this is that a fixed bending radius can be defined using the channel sections. This prevents fiber optic breakage.

[0025] In an advantageous embodiment, the direction of extension of the second channel section on the tooth surface runs parallel to a surface normal of the tooth section, particularly the tooth flank section. It is advantageous that the temperature sensor terminates at the tooth surface. A sensor area of ​​the temperature sensor is positioned at a minimal distance from the tooth surface, especially the tooth flank.

[0026] In an advantageous embodiment, the temperature sensor comprises an optical waveguide that is optically connected to a stationary pyrometric detector, particularly via telemetry, wherein the optical waveguide is housed in the channel and extends to the gear section, particularly the tooth flank section. An advantage of this is that a rapid local measurement of the surface temperature of the gear section is enabled.

[0027] In an advantageous embodiment, the optical waveguide has an end face that is flush with the surface of the gear section, in particular the tooth flank section. An advantage of this is that the surface temperature can be determined locally. The flush finish prevents the ingress of contaminants into the gear section.

[0028] In an advantageous embodiment, the optical waveguide is at least partially elastically deformed, so that it is force-fitted to the toothed part, in particular by compression. The advantage here is that a secure connection is created. Advantageously, a sheath and / or an insulating material of the optical waveguide is elastically deformed, so that an optical fiber of the optical waveguide is not pinched.

[0029] In an advantageous embodiment, the diameter of the optical waveguide is less than 1 mm, in particular less than 0.7 mm, and especially less than 0.3 mm. It is advantageous that the channel can be made narrow. Thus, the heat capacity of the gearing component is only minimally altered.

[0030] In an advantageous embodiment, the optical waveguide comprises an insulating material and an optical fiber, wherein the insulating material surrounds the optical fiber and is opaque, and wherein the insulating material is arranged between the optical fiber and the toothed section. It is advantageous that the optical waveguide can be encased opaquely by means of the insulating material. Thus, only the end region of the optical waveguide can be connected to the toothed section in a light-conducting manner. This enables a local determination of the surface temperature of the toothed section.

[0031] In an advantageous embodiment, the insulating material is made of polysiloxane, in particular silicone, or polytetrafluoroethene, in particular PTFE. It is advantageous that the insulating material is elastically deformable and / or heat-resistant. Advantageously, the melting point of the insulating material is greater than 300 °C.

[0032] In an advantageous embodiment, the optical waveguide has an opaque surface, in particular a reflective coating, wherein an end region, in particular the end face of the optical waveguide, especially the optical fiber, is transparent at the surface of the gear section, in particular the tooth flank section. It is advantageous that the optical waveguide can be insulated by means of the insulation. Thus, only the end region of the optical waveguide can be connected to the gear section in a light-conducting manner. This enables a local determination of the surface temperature of the gear section.

[0033] In an advantageous embodiment, the end region of the optical fiber is bonded to the toothed part by a material bond, in particular by adhesive bonding. It is advantageous that the optical fiber can be securely connected to the toothed part. Furthermore, the optical fiber can be connected to the toothed part without any mechanical stress on the optical fiber.

[0034] In an advantageous embodiment, the temperature sensor comprises optical elements, in particular lenses and / or filters, for focusing a light beam, especially an infrared light beam, guided in the optical waveguide, in particular the optical fiber. It is advantageous that the intensity of the light beam in the optical waveguide, in particular the optical fiber, can be increased. This improves the measurement accuracy.

[0035] In an advantageous embodiment, the end face of the optical waveguide, in particular the optical fiber, is lens-shaped, especially ground and / or polished and / or lapped. An advantage of this is that the temperature sensor can be designed compactly.

[0036] In an advantageous embodiment, the gearing element and / or the further gearing element is made of plastic. It is advantageous that the gearing element emits infrared light, by means of which the temperature of the gearing element can be determined. In particular, plastic emits more infrared light than steel.

[0037] In a preferred embodiment, the optical fiber is made of quartz glass or sapphire. A key advantage is that infrared light can be conducted through the optical fiber. Furthermore, the optical fiber advantageously exhibits good heat resistance.

[0038] In an advantageous embodiment, the gearing element and / or the further gearing element is made of steel. The advantage here is that steel has a higher mechanical strength than plastic.

[0039] In a preferred embodiment, the tooth flank is provided with an emission-enhancing material, in particular with oil and / or plastic. The advantage here is that the emission-enhancing material increases the emission of infrared light from the steel gearing component. This improves the measurement accuracy.

[0040] Advantageously, the emission-supporting material is an immersion medium whose refractive index differs from that of the optical fiber by less than 5%, advantageously by less than 3%, and most advantageously by less than 2%.

[0041] In an advantageous embodiment, the second channel section is spaced away from the surface of the toothing section, in particular the tooth flank section. An advantage of this is that the mechanical stability of the toothing part is improved.

[0042] In an advantageous embodiment, the tooth has a feedthrough for the end region of the optical fiber. It is advantageous that the end region of the optical fiber can be force-fitted to the toothed portion within the feedthrough. Advantageously, infrared light is coupled from the toothed section into the optical fiber via the cladding surface, particularly in addition to the infrared light coupled in via the end face of the optical fiber.

[0043] In an advantageous embodiment, the optical fiber extends via the feedthrough from the second channel section to the surface of the gear section, in particular the tooth flank section. An advantage of this is that the surface temperature of the gear section can be determined locally.

[0044] In an advantageous embodiment, the feedthrough has a smaller cross-section than the second channel section. It is advantageous that the end region of the optical fiber within the feedthrough can be force-fitted to the toothed section. Advantageously, infrared light is coupled from the toothed section into the optical fiber via the cladding surface, particularly in addition to the infrared light coupled via the end face of the optical fiber.

[0045] Key features of the invention in the method for manufacturing an arrangement for determining the surface temperature, preferably as described above and / or according to one of the claims relating to the arrangement for determining the temperature, comprising: - a rotatably mounted gear part, comprising a channel, in particular a groove, and a centering groove, - another rotatably mounted gear toothing part, having a centering groove, - a temperature sensor comprising an optical fiber, - a screwing agent, are that in a first process step the optical fiber is placed in the channel, wherein in a second process step the further gear part is centered relative to the gear part by means of the centering grooves, in particular so that the gear parts have a common axis of rotation, wherein in a third process step the gear parts are connected to each other by means of the screw means in a force-fit and / or form-fit manner, in particular wherein the optical fiber is pressed in between the gear part and the further gear part, in particular squeezed in, in particular by means of a sheath and / or an insulating means of the optical fiber, in a fourth process step the toothing of the gear parts is finished, in particular ground and / or polished and / or lapped.

[0046] An advantage of this is that an arrangement for the reliable local determination of the surface temperature of a gear section of a rotating gear part can be manufactured cost-effectively.

[0047] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art.

[0048] The invention will now be explained in more detail with the help of illustrations: In the Fig. Figure 1 shows a tooth of a gear part of an arrangement according to the invention for determining the surface temperature in a sectional view. Fig. Figure 2 shows two gear parts of the arrangement according to the invention for determining the surface temperature in sectional view.

[0049] The arrangement according to the invention shown in the figures for determining the surface temperature of a toothed section of a rotatably mounted toothed part (9, 10) comprises the toothed part (9, 10) and a temperature sensor.

[0050] Preferably the toothed part (9, 10) is designed as a gear, so that the surface temperature of a tooth flank section of a tooth 7 of the gear can be determined by means of the arrangement.

[0051] Preferably, the temperature of the tooth flank section, the temperature of a tooth part (not shown) engaging with the tooth part (9, 10), and the temperature of a lubricant, in particular oil, arranged between the tooth parts (9, 10) can be determined.

[0052] The arrangement includes a further toothed section 10, which is also rotatably mounted. The further toothed section 10 is rotationally fixed to the toothed section 9. The toothed section 9 and the further toothed section 10 share a common axis of rotation.

[0053] Both gear teeth (9, 10) each have a centering groove 12. The centering groove 12 allows the other gear tooth 10 to be aligned relative to the gear tooth 9. The respective centering groove 12 is located in the respective axial side surface of the respective gear tooth (9, 10).

[0054] The gear teeth (9, 10) are detachably connected to one another by means of at least one screw 11. The screw 11 is partially guided through an axial bore in the further gear teeth 10 and screwed to an axial threaded blind hole in the gear teeth 9. Preferably, several screw 11s are arranged circumferentially around the gear teeth (9, 10), in particular evenly distributed circumferentially.

[0055] The interconnected gear parts (9, 10) are finished after joining, in particular ground and / or polished and / or lapped.

[0056] The gear section (9, 10) has a channel (3, 4) for receiving the temperature sensor. The channel (3, 4) is designed as a groove in the end face of the gear section 9 facing the further gear section 10, in particular by EDM.

[0057] The canal (3, 4) opens onto the surface of tooth 7, preferably the toothing section.

[0058] Alternatively, the channel (3, 4) is arranged in the further toothed part 10.

[0059] Alternatively, the toothed part 9 and the further toothed part 10 each have a groove, so that after connecting the toothed parts (9, 10) the groove forms the channel (3, 4).

[0060] The temperature sensor is at least partially arranged between the gear parts (9, 10) and is positively connected to the gear parts (9, 10), in particular by compression connection.

[0061] The channel (3, 4) has a first channel section 4 and a second channel section 3.

[0062] The first channel section 4 extends along an axis 5, in particular the central axis of the tooth 7. Preferably, the tooth 7 is symmetrical to the axis 5.

[0063] The second channel section 3 extends from the first channel section 4 at a non-zero angle. Preferably, the angle between the first channel section 4 and the second channel section 3 is less than 90° and greater than 45°, and particularly preferably the angle is between 60° and 70°.

[0064] The second canal section 3 extends to the surface of tooth 7, in particular the flank section. The direction of extension of the second canal section 3 on the surface of tooth 7 runs parallel to a surface normal 6 of the tooth, in particular the flank 8, at an endpoint of the second canal section 3 on the surface of tooth 7.

[0065] Preferably, the temperature sensor comprises an optical fiber and a stationary pyrometric detector for evaluating the temperature from the infrared light signal of the gear part (9, 10) and / or the gear part (not shown) meshing with the gear part (9, 10) and / or the lubricant. The temperature sensor is therefore designed in multiple sections. The optical fiber comprises an optical fiber 1.

[0066] In another embodiment, the pyrometric detector for converting the infrared light signal into an electrical signal is rotationally fixed to the gearing part. The electrical signal is then transmitted telemetrically to a stationary evaluation unit, which evaluates and / or graphically displays the electrical signal.

[0067] The optical waveguide extends through the channel (3, 4). The optical waveguide terminates at the surface of the tooth 7, in particular at the tooth flank section. Preferably, the optical waveguide, especially an end face of the optical waveguide, is flush with the tooth surface.

[0068] The optical fiber 1 is surrounded by an insulating material 2, which is opaque. An end region of the optical fiber 1 is insulated. This end region is located on the surface of the toothed section, in particular the tooth flank section. The insulating material 2 is, for example, made of silicone or polytetrafluoroethylene (PTFE).

[0069] Preferably, the insulating material 2 is designed to be elastically deformable. Thus, the optical waveguide is elastically deformable in the area of ​​the insulating material (4, 5) to form a force-fit connection with the toothed parts (9, 10).

[0070] Preferably, the optical fiber 1 has an opaque surface, in particular a reflective coating. An end region of the optical fiber 1, in particular the end face, is transparent. The end region of the optical fiber 1 is preferably bonded to the toothed part (9, 10).

[0071] The diameter of the optical fiber 1 is less than 0.5 mm, preferably less than 0.3 mm.

[0072] The optical fiber 1 is made of sapphire or quartz glass.

[0073] Preferably, at least one end face of the optical fiber is lens-shaped, in particular ground and / or polished and / or lapped. The end face of the optical fiber is spherical, aspherical, convex, concave, or flat.

[0074] Preferably, the gearing element (9, 10) is made of steel. To improve the emission of infrared light, the surface of the gearing element (9, 10) is provided with an emission-enhancing material, in particular plastic and / or oil.

[0075] Alternatively, a plastic part is arranged in an end region of the channel (3, 4), in particular such that the optical waveguide contacts the plastic part. Preferably, a plastic sleeve is arranged on the end region of the optical waveguide fiber 1.

[0076] Alternatively, the gearing part (9, 10) is made of plastic, so that no additional emission-supporting substance is required.

[0077] In another embodiment, the channel (3, 4) terminates blindly in the tooth 7. The channel (3, 4) is spaced apart from the surface of the tooth 7 and connected to the surface of the tooth 7, in particular the tooth flank section, by means of at least one feedthrough. The end region of the optical fiber 1 extends through the feedthrough and is optically connected to the tooth flank section. The feedthrough has a smaller diameter than the minimum diameter of the channel (3, 4).

[0078] In another embodiment, the channel (3, 4) terminates blindly in the tooth 7. The optical fiber terminates in the channel (3, 4). Preferably, the blind end of the channel (3, 4) is spaced a maximum of 5 mm from the surface of the toothed section, more preferably a maximum of 3 mm, and particularly preferably a maximum of 1 mm. Preferably, an emission-enhancing material, in particular oil and / or plastic, is arranged between the end face of the optical fiber and the blind end of the channel (3, 4).

[0079] In another embodiment not shown, the temperature sensor has several identical optical waveguides arranged side by side in the channel (3, 4). The respective end sections of the optical waveguides are arranged on the same gear section, in particular the tooth flank section. Preferably, one optical waveguide is connected to a pyrometric detector connected to a data acquisition unit and / or data storage unit, and another optical waveguide is connected to a pyrometric detector connected to a drive control for the gear section (9, 10).

[0080] In another embodiment not shown, several temperature sensors are arranged in the gear section (9, 10). Each temperature sensor has at least one optical fiber. The optical fibers are housed in spaced-apart channels, so that the end regions of the optical fibers are spaced apart. This enables the detection of surface temperatures on spaced-apart teeth 9 of the gear section (9, 10) and / or spaced-apart gear sections, in particular tooth flank sections.

[0081] Each optical waveguide is connected telemetrically to a respective stationary pyrometric detector.

[0082] In an embodiment not shown, the gear part (9, 10) is non-rotatably connected to a shaft which is supported in a housing by means of two bearings.

[0083] The housing surrounds the shaft and the geared part (9, 10) at least partially, forming a housing. The shaft extends through one of the bearings and beyond the housing, in particular from an interior space of the housing.

[0084] The shaft and the gear part (9, 10) have a common axis of rotation.

[0085] Preferably, the shaft and the geared part (9, 10) are mounted for continuous rotatability. Continuous rotatability here means that the shaft and / or the geared part (9, 10) can be rotated through more than 360°, preferably allowing for a multitude of rotations. For example, the shaft can be driven by an electric motor (not shown).

[0086] The shaft is rotationally fixed to the optical fiber. The optical fiber is housed in a channel within the shaft. The channel comprises a bore section extending along the axis of rotation and a transverse bore section extending from the axis of rotation to the surface of the shaft at a non-zero angle to the bore section. Preferably, the angle between the bore section and the transverse bore section is less than 90°, particularly less than 60°, and preferably less than 50° and / or greater than 40°.

[0087] The optical waveguide extends in the axial direction from a shaft end located outside the housing through the bore section and the transverse bore section, along the surface of the shaft to the toothed section and into the first channel section 4.

[0088] The optical waveguide is connected to the wave by a force-fit and / or material bond. Preferably, the optical waveguide is glued and / or clamped and / or pressed into the channel. Preferably, the optical waveguide is connected to the wave in the channel in a liquid-tight manner, at least in sections.

[0089] Along the surface of the wave, the optical waveguide is preferably bonded to the wave using adhesive.

[0090] Alternatively, the optical waveguide is guided inside the wave up to the toothed part (9, 10) and extends from the channel in the wave directly into the first channel section 4 in the toothed part (9, 10).

[0091] The optical waveguide has an additional end face that is arranged facing an end face of another optical waveguide. The additional end face of the optical waveguide and the end face of the other optical waveguide are arranged centered on the axis of rotation 6.

[0092] The additional optical waveguide is arranged in a stationary position, in particular not rotatable, and is connected to the pyrometric detector in a light-conducting manner.

[0093] The pyrometric detector converts the infrared light into an electrical signal that can be evaluated and / or graphically represented by an evaluation unit not shown.

[0094] The optical waveguide, the further optical waveguide and the pyrometric detector are connected to each other in such a way as to conduct infrared light, such that the infrared light from the toothed section to the pyrometric detector is conductive, in particular continuously conductive and / or uninterrupted.

[0095] The arrangement includes a retaining element for the additional optical fiber. The additional optical fiber is connected to the retaining element by frictional and / or material bonding, in particular by clamping, adhesive bonding, and / or press bonding. Preferably, the additional optical fiber is connected to the retaining element in a liquid-tight manner, at least in sections.

[0096] The holding means surrounds the end face of the further optical waveguide and the further end face of the optical waveguide at least partially forming a housing, in particular in such a way that the end faces can be shielded from diffuse and / or external infrared light that would distort the temperature determination.

[0097] The holding element comprises a shielding section that radially surrounds a wave end section of the wave, which surrounds the further end face of the first optical waveguide. Preferably, a region axially covered by the holding element and a region axially covered by the wave overlap each other in the axial direction. The maximum outer diameter of the wave is smaller in a region axially covered by the holding element and the wave than the inner diameter of the holding element, in particular of the shielding section, in that region.

[0098] The retaining element can be implemented as a single piece or in multiple pieces with the shielding section.

[0099] A receiving area for immersion fluid is arranged between the end face of the optical waveguide and the end face of the second optical waveguide. A seal is arranged between the shaft and the holding element. The projection of the seal into an axial plane radially surrounds the projection of the end face of the optical waveguide and the projection of the end face of the second optical waveguide in this plane.

[0100] The receiving area is bounded by the end face of the optical waveguide, the end face of the second optical waveguide, the shaft, the retaining element, and the seal, in particular such that the receiving area is liquid-tight. For this purpose, the optical waveguide is connected to the shaft in a liquid-tight manner, at least in sections, and the second optical waveguide is connected to the retaining element in a liquid-tight manner, at least in sections.

[0101] The immersion fluid has a refractive index that is at most 20% smaller or larger than the refractive index of the optical waveguides, in particular at most 10% smaller or larger, and in particular at most 5% smaller or larger. Aqueous, oily, and / or glycerin-based solutions can be used as the immersion fluid.

[0102] The holding device has a valve and a bore opening into the receiving area for filling the receiving area with the immersion fluid.

[0103] Preferably, the further end face of the optical waveguide is convexly shaped and the end face of the further optical waveguide is also convexly shaped, wherein the focal points of the lens-shaped end faces lie at a common point.

[0104] Preferably, the gear element (9, 10) is designed as a gear or pinion shaft of a transmission. The gear or pinion shaft is rotationally fixed to the shaft and / or formed integrally with the shaft.

[0105] In this embodiment, the housing is designed as a gearbox housing. The shaft can be configured as either the input or output shaft of the gearbox.

[0106] Advantageously, the surface temperature of the gear section can be determined during operation of the gearbox. Alternatively, the surface temperature of the gear section can be determined during manufacturing, particularly during a cutting and / or grinding process, of the gear part (9, 10) using this arrangement. This allows manufacturing parameters, such as the speed of the cutting and / or grinding tool, to be optimized, as a temperature limit of the gear part (9, 10) must not be exceeded during manufacturing.

[0107] A method according to the invention for producing the arrangement according to the invention for determining the surface temperature comprises the following process steps: In a first process step, the optical fiber is inserted into the channel (3, 4).

[0108] In a second process step, the further gear part (10) is centered relative to the gear part (9) by means of the centering grooves (12).

[0109] In a third process step, the gear parts (9, 10) are connected to each other by means of the screw means (11) in a force-locking and / or form-locking manner, whereby the optical waveguide is pressed in, in particular squeezed in, between the gear part (9) and the further gear part (10).

[0110] In a fourth process step, the toothing of the gear parts (9, 10) is finished, in particular ground and / or polished and / or lapped.

[0111] In a fifth process step, the optical waveguide is connected telemetrically to a stationary pyrometric detector, whereby an evaluation unit determines the surface temperature of the gear section from the infrared light signal of the optical waveguide. Reference symbol list 1 optical fiber 1a Front surface 2 Insulating materials 3 second canal section 4 first canal section 5th axis, especially the central axis 6 Surface normals 7 tooth 8 Tooth flank 9 first gear part 10 second gear part 11 Screws 12 Centering groove

Claims

[1] Arrangement for determining the surface temperature of a tooth section of a tooth part (9), in particular a tooth flank section of a tooth (7), comprising - the toothed part (9), having at least one tooth (7), - at least one temperature sensor, wherein the gear part (9) is rotatably mounted, characterized by , that the gear part (9) has a channel (3, 4) in which the temperature sensor is at least partially accommodated, wherein the channel (3, 4) opens at the surface of the toothing section, in particular the tooth flank section, wherein the arrangement includes a further rotatably mounted gear part (10), wherein the gear parts (9, 10) are connected to each other in a rotationally fixed manner and have a common axis of rotation, wherein the temperature sensor is arranged at least partially in the axial direction between the gear part (9) and the further gear part (10), in particular is connected to the gear parts (9, 10) by friction and / or form locking. [2] Arrangement for determining the surface temperature according to claim 1, characterized by , that the toothed part (9) and the further toothed part (10) each have a centering groove (12), in particular an annular centering groove (12), so that the toothed part (9) and the further toothed part (10) can be aligned relative to each other, wherein the toothed part (9) and the further toothed part (10) are positively connected to each other, in particular detachably connected, in particular by means of a screw means (11), in particular wherein a gear composed of the toothed part (9) and the further toothed part (10) is finished, in particular ground and / or polished and / or lapped. [3] Arrangement for determining the surface temperature according to at least one of the preceding claims, characterized by , that the channel (3, 4) is designed as a recess, in particular a groove, in the toothed part (9) and / or the further toothed part (10). [4] Arrangement for determining the surface temperature according to at least one of the preceding claims, characterized by , that the channel (3, 4) has a first channel section (4) and a second channel section (3), wherein the temperature sensor extends through the first channel section (4) and the second channel section (3). [5] Arrangement for determining the surface temperature according to at least claim 4, characterized by , that the first canal section (4) extends along an axis (5), in particular the central axis, of the tooth (7), in particular wherein the toothing of the tooth (7) is symmetrical to the axis (5). [6] Arrangement for determining the surface temperature according to at least claim 4 or 5, characterized by , that the second channel section (3) extends at a non-zero angle to the first channel section (4), in particular wherein the extension direction of the second canal section (3) on the surface of the tooth (7) runs parallel to a surface normal (6) of the tooth section, in particular of the tooth flank section. [7] Arrangement for determining the surface temperature according to at least one of the preceding claims, characterized by , that the temperature sensor has an optical waveguide that is optically connected to a stationary pyrometric detector, in particular telemetrically connected, wherein the optical waveguide is received in the channel (3, 4) and extends to the gear section, in particular the tooth flank section, in particular wherein the optical waveguide has an end face (1a) which is flush with the surface of the gear section, in particular the tooth flank section. [8] Arrangement for determining the surface temperature according to at least claim 7, characterized by , that the optical waveguide is at least partially elastically deformed, so that the optical waveguide is force-fit connected to the toothed part (9, 10), in particular by compression connection, in particular wherein the diameter of the optical waveguide is less than 1 mm, in particular less than 0.7 mm, in particular less than 0.3 mm. [9] Arrangement for determining the surface temperature according to at least claim 7 or 8, characterized by , that the optical waveguide comprises an insulating medium (2) and an optical waveguide fiber (1), wherein the insulating medium (2) surrounds the optical waveguide fiber (1), wherein the insulating medium (2) is opaque, wherein the insulating material is arranged between the optical fiber (1) and the toothed part (9, 10), in particular wherein the insulating material (2) is made of polysiloxane, in particular silicone, or polytetrafluoroethene, in particular PTFE. [10] Arrangement for determining the surface temperature according to claim 9, characterized by , that the optical waveguide has an opaque surface, in particular a reflective coating, wherein an end region, in particular the end face (1a) of the optical waveguide, in particular the optical waveguide fiber (1), is made transparent on the surface of the toothing section, in particular the tooth flank section, in particular wherein the end region of the optical fiber (1) is bonded to the toothed part (9, 10) in a material-bonded manner, in particular by adhesive bonding. [11] Arrangement for determining the surface temperature according to at least claim 9 or 10, characterized by , that the temperature sensor comprises optical elements, in particular lenses and / or filters, for focusing a light beam, in particular an infrared light beam, guided in the optical waveguide, in particular the optical waveguide fiber (1), in particular wherein the end face (1a) of the optical waveguide, in particular of the optical waveguide fiber (1), is lenticular in shape, in particular ground and / or polished and / or lapped. [12] Arrangement for determining the surface temperature according to at least claim 9, 10 or 11, characterized by , that the toothed part (9) and / or the further toothed part (10) is made of plastic, and / or that the optical fiber (1) is made of quartz glass or sapphire, and / or that the gear part (9) and / or the further gear part (10) is made of steel, in particular wherein the tooth flank (8) is provided with an emission-supporting substance, in particular with oil and / or plastic. [13] Arrangement for determining the surface temperature according to at least claim 4 and claim 9, characterized by , that the second channel section (3) is spaced apart from the surface of the toothing section, in particular the tooth flank section, in particular wherein the tooth (7) has a feedthrough for the end region of the optical fiber, in particular wherein the optical fiber (1) extends by means of the feedthrough from the second channel section (3) to the surface of the gear section, in particular the tooth flank section, in particular wherein the passage has a smaller cross-section than the second channel section (3). [14] Method for manufacturing an arrangement for determining the surface temperature, in particular according to at least one of claims 1 to 13, comprising: - a rotatably mounted gear part (9), comprising a channel (3, 4), in particular a groove, and a centering groove (12), - another rotatably mounted gear part (10), having a centering groove (12), - a temperature sensor comprising an optical fiber, - a screwing device (11), wherein in a first process step the optical fiber is inserted into the channel (3, 4), wherein in a second process step the further gear part (10) is centered relative to the gear part (9) by means of the centering grooves (12), in particular so that the gear parts (9, 10) have a common axis of rotation, wherein in a third process step the gear parts (9, 10) are connected to each other by means of the screw means (11) in a force-fit and / or form-fit manner, wherein the optical fiber is pressed in, in particular squeezed in, between the gear part (9) and the further gear part (10), wherein in a fourth process step the toothing of the toothing parts (9, 10) is finished, in particular ground and / or polished and / or lapped.

Images