A bearing inner ring temperature measurement structure and method for solving axial movement

Abstract

This application belongs to the field of aero-engine technology, and specifically relates to a bearing inner ring temperature measurement structure and method for solving axial movement. The bearing has a test hole on its end face, the axis of which is parallel to the bearing axis. A clamping nut is fitted to the bearing and has a lead wire hole, the axis of which coincides with the axis of the test hole. A lead wire shaft has a waist-shaped hole, the axis of which is perpendicular to the axis of the lead wire hole. A temperature measurement component fixing device is fixed to the clamping nut and has a through hole. A metal hollow tube is welded into the through hole of the temperature measurement component fixing device and passes through the waist-shaped hole of the lead wire shaft. The temperature measurement component has its measuring end passing sequentially through the lead wire hole of the clamping nut and the test hole of the bearing, and is spot-welded to the clamping nut by a measuring end fixing bracket. The lead wire of the temperature measurement component passes through the metal hollow tube and is introduced into the lead wire shaft.

Description

Technical Field

[0001] This application belongs to the field of aero-engine technology, and specifically relates to a bearing inner ring temperature measurement structure and method for solving axial movement. Background Technology

[0002] The instruction manual for the accessory housing of an aero-engine transmission system must specify the bearing temperature during system operation; therefore, it is necessary to measure the bearing temperature of the transmission system. Numerous bearings exist within the accessory housing. Currently, a series of temperature sensor installation methods and temperature measurement methods have been developed for the inner and outer ring end faces of these bearings. At present, a temperature sensing component made of fluorine-coated thermocouples is commonly used, installed via energy storage spot welding, to measure the temperature of the bearing inner ring end face. A schematic diagram of the measurement method can be found [see diagram]. Figure 1 This method can basically achieve temperature measurement of the bearing inner ring end face in the confined space within the accessory housing, but it sometimes cannot fully meet the requirements of complex sensor leads, especially when there is axial movement between the bearing and the lead shaft after assembly. Therefore, a bearing inner ring end face temperature testing structure based on a fluorine-coated thermocouple was designed. This testing structure can meet the above-mentioned technical difficulties and solve the problem of testing the inner ring end face temperature of the bearing and lead shaft in aero-engine accessory housings with axial movement.

[0003] (1) The wall temperature is measured by using temperature-indicating paint. The measurement result is the highest temperature value under the maximum state during the engine test process. Real-time temperature data cannot be obtained. Moreover, the temperature-indicating paint test requires special testing. There are strict requirements for the test component materials and test environment. If it is contaminated by oil or carbon deposits, the temperature-indicating paint test results cannot be interpreted.

[0004] (2) Non-contact temperature measurement technologies such as infrared and fiber optic cannot meet the testing needs of complex and confined spaces.

[0005] (3) The current thermocouple temperature measurement method cannot fully meet the actual requirements of the reliability of complex lead path installation. Summary of the Invention

[0006] To address the aforementioned problems, this application provides a bearing inner ring temperature measurement structure for resolving axial movement, comprising:

[0007] The bearing has a test hole on its end face, and the axis of the test hole is parallel to the bearing axis.

[0008] A clamping nut is installed in conjunction with the bearing, and a lead wire hole is provided on it, with the axis of the lead wire hole coinciding with the axis of the test hole.

[0009] A lead shaft with an oblong hole on it, the axis of which is perpendicular to the axis of the lead hole;

[0010] A temperature measuring component fixing device is fixed on the clamping nut and has a through hole;

[0011] A hollow metal tube is welded into the through hole of the temperature measuring component fixing device and inserted into the waist-shaped hole of the lead shaft.

[0012] The temperature measuring component has its measuring end passing through the lead hole of the clamping nut and the test hole of the bearing in sequence, and is spot-welded to the clamping nut by the measuring end fixing bracket; the lead of the temperature measuring component passes through the metal hollow tube and is introduced into the lead shaft.

[0013] Preferably, the temperature measuring component includes a thermocouple, a measuring end node, a measuring end fixing bracket, and a support tube; the measuring end fixing bracket and the support tube are welded together at the front end using silver brazing.

[0014] Preferably, the support tube of the temperature measuring component is fixed to the temperature measuring component fixing device by spot welding of a metal sheet.

[0015] Preferably, the thermocouple leads of the temperature measuring component are covered with a thin metal sheet and fixed by spot welding.

[0016] Preferably, the length of the oblong hole is greater than or equal to the maximum axial movement, so as to ensure that the hollow metal tube can move freely in the oblong hole and adapt to axial movement when the bearing is in operation.

[0017] A method for measuring the temperature of the bearing inner ring using the aforementioned bearing inner ring temperature measuring structure for resolving axial movement includes the following steps:

[0018] S1. Machining test holes on the test end face of the bearing, machining lead holes on the clamping nut, and machining oblong holes on the lead shaft;

[0019] S2. Weld the metal hollow tube into the through hole of the temperature measuring component fixing device;

[0020] S3. Weld the temperature measuring component fixing device to the clamping nut;

[0021] S4. Pass the measuring end of the temperature measuring component through the lead hole of the clamping nut and the test hole of the bearing, and spot weld it to the clamping nut through the measuring end fixing bracket;

[0022] S5. Pass the lead wire of the temperature sensing component through the metal hollow tube and introduce it into the lead wire shaft;

[0023] S6. Fix the support tube of the temperature measuring component to the temperature measuring component fixing device by spot welding with a metal sheet.

[0024] Preferably, after step S5, the method further includes: covering the thermocouple leads of the temperature measuring component with a metal sheet and spot welding them in place.

[0025] A bearing temperature monitoring system includes the aforementioned bearing inner ring temperature measuring structure for resolving axial movement, and a temperature signal processing device connected to the temperature measuring component.

[0026] This invention is designed to eliminate the amount of movement of the lead shaft in the direction perpendicular to the bearing during bearing operation by means of structural cooperation, thus solving the problem of measuring the temperature of the bearing inner ring when there is movement between the bearing under test and the lead shaft. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a bearing inner ring temperature measurement structure to address axial movement.

[0028] Figure 2 This is a schematic diagram of the temperature sensing component;

[0029] Figure 3 This is a 3D diagram of a bearing inner ring temperature measurement structure designed to address axial movement. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings. Figures 1-3 As shown, it includes:

[0031] Bearing 1 has a test hole on its end face, and the axis of the test hole is parallel to the axis of bearing 1.

[0032] A clamping nut 2 is installed in conjunction with the bearing 1. It has a lead wire hole, and the axis of the lead wire hole coincides with the axis of the test hole.

[0033] The lead shaft 6 has an oblong hole 5 on it, and the axis of the oblong hole 5 is perpendicular to the axis of the lead hole;

[0034] Temperature measuring component fixing device 4 is fixed on the clamping nut 2 and has a through hole;

[0035] The metal hollow tube 7 is welded into the through hole of the temperature measuring component fixing device 4 and inserted into the waist-shaped hole 5 of the lead shaft 6.

[0036] The temperature measuring component 3 has its measuring end passing through the lead hole of the clamping nut 2 and the test hole of the bearing 1 in sequence, and is spot-welded to the clamping nut 2 through the measuring end fixing bracket; the lead of the temperature measuring component 3 passes through the metal hollow tube 7 and is introduced into the lead shaft 6;

[0037] The composition and manufacturing process of the test structure include:

[0038] 1. A test hole is added to the test end face of bearing 1, and a lead hole is added to clamping nut 2. In the assembled state, the holes on bearing 1 and clamping nut 2 are aligned. A waist-shaped hole 5 is added to the lead shaft 6. The length of the waist-shaped hole is determined according to the maximum axial movement.

[0039] 2. A through hole is machined on the temperature measuring component fixing structure 4, and a metal hollow tube 7 is welded into the through hole. The metal hollow tube 7 is inserted into the waist-shaped hole 5 on the side near the lead shaft 6. The temperature measuring component fixing device 4 and the bearing clamping nut 2 are welded together to provide an installation support path for the temperature measuring component 3.

[0040] 3. The temperature measuring component 3 consists of a thermocouple, a measuring end node, a measuring end fixing bracket, and a support tube. The measuring end fixing bracket and the support tube are welded together at the front end using silver brazing.

[0041] 4. The measuring end of the temperature measuring component 3 passes through the lead hole on the bearing clamping nut 2 and the test hole on the test end face of the bearing 1, and is spot-welded to the clamping nut 2 through the measuring end fixing bracket. The thermocouple lead passes through the metal hollow tube 7 and is introduced into the lead shaft 6.

[0042] 5. Fix the support tube of the temperature measuring component 3 to the temperature measuring component fixing device 4 by spot welding with a metal sheet, and cover the thermocouple leads of the temperature measuring component 3 with a metal sheet and spot weld them in place;

[0043] 6. Temperature measuring component 3 is installed and fixed on temperature measuring component fixing device 4. The combined structure of 3 and 4 cooperates with the waist-shaped hole 5 on the lead shaft 6 to meet the amount of movement of the lead shaft 6 in the direction perpendicular to the bearing when the bearing is running.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A bearing inner ring temperature measuring structure for solving axial movement, characterized in that, include: The bearing (1) has a test hole on its end face, and the axis of the test hole is parallel to the axis of the bearing (1). A clamping nut (2) is installed in conjunction with the bearing (1), and a lead hole is provided on it, with the axis of the lead hole coinciding with the axis of the test hole; A lead wire shaft (6) is provided with a waist-shaped hole (5), the axis of which is perpendicular to the axis of the lead wire hole; Temperature measuring component fixing device (4) is fixed on the clamping nut (2) and has a through hole; A metal hollow tube (7) is welded into the through hole of the temperature measuring component fixing device (4) and inserted into the waist-shaped hole (5) of the lead shaft (6); The temperature measuring component (3) has its measuring end passing through the lead hole of the clamping nut (2) and the test hole of the bearing (1) in sequence, and is spot-welded to the clamping nut (2) by the measuring end fixing bracket; the lead wire of the temperature measuring component (3) passes through the metal hollow tube (7) and is introduced into the lead wire shaft (6).

2. The bearing inner ring temperature measuring structure for solving axial movement according to claim 1, characterized in that, The temperature measuring component (3) includes a thermocouple, a measuring end node, a measuring end fixing bracket, and a support tube; the measuring end fixing bracket and the support tube are welded together at the front end by silver brazing.

3. The bearing inner ring temperature measuring structure for solving axial movement according to claim 1 or 2, characterized in that, The support tube of the temperature measuring component (3) is fixed to the temperature measuring component fixing device (4) by spot welding of metal sheets.

4. The bearing inner ring temperature measuring structure for solving axial movement according to claim 1, characterized in that, The thermocouple leads of the temperature measuring component (3) are covered with a thin metal sheet and fixed by spot welding.

5. The bearing inner ring temperature measuring structure for solving axial movement according to claim 1, characterized in that, The length of the waist-shaped hole (5) is greater than or equal to the maximum axial movement, so as to ensure that the metal hollow tube (7) can move freely in the waist-shaped hole (5) to adapt to axial movement when the bearing is in operation.

6. A method for measuring the temperature of the inner ring of a bearing using the bearing inner ring temperature measuring structure for solving axial movement as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. A test hole is machined on the test end face of the bearing (1), a lead hole is machined on the clamping nut (2), and a waist-shaped hole (5) is machined on the lead shaft (6). S2. Weld the metal hollow tube (7) into the through hole of the temperature measuring component fixing device (4); S3. Weld the temperature measuring component fixing device (4) to the clamping nut (2); S4. Pass the measuring end of the temperature measuring component (3) through the lead hole of the clamping nut (2) and the test hole of the bearing (1), and fix it to the clamping nut (2) by spot welding through the measuring end fixing bracket; S5. Pass the lead wire of the temperature measuring component (3) through the metal hollow tube (7) and introduce it into the lead wire shaft (6); S6. Fix the support tube of the temperature measuring component (3) to the temperature measuring component fixing device (4) by spot welding with a metal sheet.

7. The bearing inner ring temperature measurement method according to claim 6, characterized in that, After step S5, the method further includes: covering the thermocouple leads of the temperature measuring component (3) with a metal sheet and spot welding them in place.

8. A bearing temperature monitoring system, characterized in that, It includes a bearing inner ring temperature measuring structure for solving axial movement as described in any one of claims 1-5, and a temperature signal processing device connected to the temperature measuring component (3).

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