Measurement device for axial clearance of aircraft DC starter motor

Abstract

This utility model discloses a measuring device for the axial clearance of an aircraft DC starter motor. It includes a base plate, on which are fixed a steering device for controlling the motor's direction, a fixed bracket for supporting the DC starter motor, and a clamping device for fixing the motor shaft. A sensor fixing device is also provided on the base plate to fix a horizontal laser displacement sensor used for measuring the motor's axial clearance. The axes of the steering device, fixed bracket, clamping device, and sensor fixing device are located on the same axis. By introducing a high-precision sensor, accurate measurement and real-time detection of the axial clearance are achieved. Furthermore, the clamping device and fixed bracket ensure that the position of the motor shaft does not move during the measurement process, resulting in more accurate measurements.

Description

Technical Field

[0001] This utility model relates to the field of aviation equipment measurement technology, specifically to a device for measuring the axial clearance of aviation DC starter motors. Background Technology

[0002] With the rapid development of the aviation industry, the performance stability and reliability of aircraft DC starter motors, as a key component of aircraft power systems, are crucial for ensuring flight safety. However, in practical applications, due to manufacturing errors, wear and tear, the axial clearance of aircraft DC starter motors often changes, thus affecting motor performance. Therefore, accurate measurement of the axial clearance of aircraft DC starter motors is of great significance for ensuring motor performance and improving flight safety.

[0003] According to research data from both domestic and international sources, variations in axial clearance have a significant impact on the performance of aircraft DC starter motors. Excessive axial clearance can lead to increased motor vibration, noise, and even motor failure; conversely, insufficient axial clearance can increase frictional losses and reduce motor efficiency. Therefore, precise control of axial clearance is crucial for ensuring the stable performance of aircraft DC starter motors.

[0004] Currently, the methods for measuring the axial clearance of aircraft DC starter motors, both domestically and internationally, mainly rely on traditional mechanical measuring tools, such as vernier calipers and micrometers. However, these methods suffer from drawbacks such as low measurement accuracy and cumbersome operation, making it difficult to meet the high-precision measurement requirements of the modern aviation industry. Therefore, it is necessary to develop a new device for measuring the axial clearance of aircraft DC starter motors. Utility Model Content

[0005] The purpose of this invention is to provide a measuring device for the axial clearance of an aircraft DC starter motor. By introducing a high-precision laser displacement sensor, it enables accurate measurement and real-time monitoring of the axial clearance.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0007] A device for measuring the axial clearance of an aircraft DC starter motor includes a base plate. The base plate is fixed with a steering device for controlling the direction of the motor, a fixed bracket for supporting the DC starter motor, and a clamping device for fixing the motor shaft of the DC starter motor. The base plate is also provided with a sensor fixing device for fixing a horizontal laser displacement sensor used to measure the axial clearance of the motor. The axes of the steering device, the fixed bracket, the clamping device, and the sensor fixing device are located on the same axis.

[0008] In some specific implementations, the fixed bracket is a U-shaped bracket with a U-shaped opening on one side (the DC starter motor is placed in the U-shaped opening).

[0009] In some specific embodiments, the clamping device includes a fixing member for fixing the motor shaft and a clamping member for clamping the motor shaft, with the clamping member placed on the fixing member to clamp the end of the motor shaft.

[0010] In some specific embodiments, the fastener includes a fixing plate and a first fixing support plate and a second fixing support plate for supporting the fixing plate. The first fixing support plate and the second fixing support plate are symmetrically arranged on both sides of the fixing plate and fixed to the base plate. The fixing plate has a through hole through which the motor shaft passes.

[0011] In some specific embodiments, the clamping component includes a detachable fixing clamp and a first clamp embedded in the detachable fixing clamp to clamp and fix the motor shaft. The detachable fixing clamp is placed on a first fixing support plate. The detachable fixing clamp has a slot aligned with the through hole (located on the same axis). The first clamp is embedded in the slot and has a motor shaft fixing hole aligned with the through hole to accommodate motor shafts of different sizes.

[0012] In some specific embodiments, the detachable fixing clamp includes an integrally formed fixed end and a detachable clamping end. The fixed end is fixed to a first fixed support plate, and the detachable clamping end includes a first clamping part and a second clamping part fixed by a connector (pin). The first clamping part and the fixed end are integrally formed.

[0013] In some specific implementations, the steering device includes a support bracket fixed to the base plate and a control component placed on the support bracket to control the steering of the DC starter motor.

[0014] In some specific implementations, the support bracket is a triangular bracket with perforations, through which the control components are connected to the motor shaft.

[0015] In some specific implementations, the control components include a steering wheel, a power transmission shaft, and an adapter. The adapter and ball bearings are both mounted on the motor shaft. One end of the guide retainer is connected to the power transmission shaft, and the other end is fixed with a ball bearing. The motor shaft passes through the adapter, the ball bearing, and the support bracket in sequence and is connected to the power transmission shaft. The steering wheel is fixed to the power transmission shaft.

[0016] The beneficial effects of this utility model are:

[0017] This invention fully considers the structure and working environment of the motor. By introducing a high-precision sensor, it enables accurate measurement and real-time detection of the axial clearance. Furthermore, by incorporating a clamping device and a fixed support, it ensures that the motor shaft position does not shift during measurement, achieving more precise measurements. The axial clearance measuring device for aviation DC starter motors proposed in this application has advantages such as compact structure and accurate measurement, providing a convenient tool for aviation motor maintenance and testing. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the measuring device for the axial clearance of an aviation DC starter motor provided in an embodiment of this utility model;

[0019] Figure 2 This is a schematic diagram of the clamping component structure provided in an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the sensor fixing device provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Base plate, 2-Support bracket, 3-Control component, 31-Steering wheel, 32-Power transmission shaft, 33-Adapter, 34-Ball bearing, 35-Guide retainer, 4-Fixed bracket, 5-Fixed component, 51-Fixed plate, 52-First fixed support plate, 53-Second fixed support plate, 6-Removable fixing clamp, 61-Fixed end, 62-Removable clamping end, 621-First clamping part, 622-Second clamping part, 63-Connector, 64-Slot, 7-First clamp, 8-Sensor fixing device. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0027] Example 1:

[0028] like Figure 1 As shown, this embodiment provides a measuring device for the axial clearance of an aircraft DC starter motor, including a base plate 1. The base plate 1 is fixed with a steering device for controlling the direction of the motor, a fixed bracket 4 for supporting the DC starter motor, and a clamping device for fixing the motor shaft of the DC starter motor. The base plate 1 is also provided with a sensor fixing device 8 for fixing a horizontal laser displacement sensor used to measure the axial clearance of the motor. The axes of the steering device, the fixed bracket 4, the clamping device, and the sensor fixing device 8 are all located on the same axis and coincide with the axis of the motor shaft.

[0029] Specifically, such as Figure 1 As shown, the fixed bracket 4 is a U-shaped bracket with a U-shaped opening on one side (the DC starter motor is placed in the U-shaped opening).

[0030] like Figure 2 As shown, the clamping device includes a fixing member 5 for fixing the motor shaft and a clamping member for clamping the motor shaft. The clamping member is placed on the fixing member 5 to clamp the end of the motor shaft.

[0031] The fixing component 5 includes a fixing plate 51 and a first fixing support plate 52 and a second fixing support plate 53 for supporting the fixing plate 51. The first fixing support plate 52 and the second fixing support plate 53 are symmetrically arranged on both sides of the fixing plate 51 and fixed to the base plate 1. The fixing plate 51 has a through hole for the motor shaft to pass through. The first fixing support plate 52 and the second fixing support plate 53 provide stable support for the fixing plate 51, ensuring that the position of the motor shaft will not move during the measurement process, and also serve to stably place the clamping component and firmly clamp the motor shaft.

[0032] To accommodate motor shafts of different sizes and ensure that the motor shaft does not move during measurement, a clamping device is used to fix the motor shaft in a secondary position, ensuring stability during measurement. The clamping device includes a detachable fixing clamp 6 and a first clamp 7 embedded in the detachable fixing clamp 6 to clamp and fix the motor shaft. The detachable fixing clamp 6 is placed on a first fixed support plate 52 and has a slot 64 aligned with the through hole (located on the same axis). The first clamp 7 is embedded in the slot 64 and has a motor shaft fixing hole aligned with the through hole, accommodating motor shafts of different sizes.

[0033] In some specific embodiments, the detachable fixing clamp 6 includes an integrally formed fixing end 61 and a detachable clamping end 62. The fixing end 61 is fixed on the first fixing support plate 52. The detachable clamping end 62 includes a first clamping part 621 and a second clamping part 622 fixed by a connector 63 (pin). The first clamping part 621 and the fixing end 61 are integrally formed. It can be seen that a semi-open slot is provided on the opposite side of the first clamping part 621 and the second clamping part 622. When the first clamping part 621 and the second clamping part 622 are fixed together, the two semi-open slots form a complete slot 64. Adaptively, the first clamp 7 is also divided into a left clamp and a right clamp. The left and right clamps are respectively placed in the two semi-slots of the first clamping part 621 and the second clamping part 622. A semi-circular motor shaft fixing hole is provided on the opposite side of both the left and right clamps. When the first clamping part 621 and the second clamping part 622 are fixed, the left and right clamps are combined, and the two semi-circular motor shaft fixing holes fix the motor shaft. Since the first clamping part 621 and the second clamping part 622 are detachable, their slot sizes are variable, and the motor shaft fixing holes are variable, not only is the motor shaft further fixed to prevent movement, but it can also adapt to motor shafts of different sizes. Furthermore, the first clamp 7 is an adaptable clamp; clamps with different hole diameters can be replaced according to different specifications of motor shafts.

[0034] To achieve steering control of the motor, the steering device includes a support bracket 2 fixed on the base plate 1 and a control component 3 placed on the support bracket to control the steering of the DC starter motor. The support bracket 2 is a triangular bracket with perforations, which is connected to the base plate 1 through holes in the base plate 1, serving to provide support and fixation. The control component 3 passes through the perforations and is connected to the motor shaft.

[0035] To achieve accurate measurement, the control assembly 3 includes a steering wheel 31, a power transmission shaft 32, and an adapter 33. The adapter 33 and ball bearing 34 are both mounted on the motor shaft. A guide retainer 35 is connected to the power transmission shaft 32 at one end and has the ball bearing 34 fixed at the other. The motor shaft passes sequentially through the adapter 33, ball bearing 34, and support bracket to connect to the power transmission shaft 32. The steering wheel 31 is fixed to the power transmission shaft 32. The guide retainer 35 guides and fixes the ball bearing 34, which is located on the motor shaft to reduce axial clearance. The ball bearing 34 passes through a hole in the triangular support bracket and is connected and fixed to the guide retainer 35 on the other side. The guide retainer 35 and the adapter 33 are located on opposite sides of the triangular support bracket 2. The power transmission shaft 32 transmits power, transferring the power from the steering wheel 31 to control the motor's direction to the motor shaft.

[0036] like Figure 3 As shown, the sensor fixing device 8 has clamping holes for fixing the horizontal laser displacement sensor, and the sensor fixing device 8 is fixed to the base plate 1 by pins. Corresponding to the position of the clamping device, it is located on the base plate 1 between the first fixed support plate 52 and the second fixed support plate 53. The horizontal laser displacement sensor faces the end of the motor shaft and is used to measure the axial clearance of the motor. To better visualize the measurement results, the horizontal laser displacement sensor can be connected to a computer. By uploading the measured results to the computer software interface, the measurement results can be displayed, and when the measurement error is large, it can guide the adjustment direction of the measurement process.

[0037] Understandably, the measurement principle and device setup are crucial in the study of axial clearance measurement of aircraft DC starter motors. Considering the minute size of the axial clearance and its critical impact on motor performance, and given the widespread application of laser displacement sensors in the field of minute clearance measurement due to their high precision, high sensitivity, and fast response, this application employs a non-contact measurement device based on a laser displacement sensor. This device, through the emission and reception of a laser beam, allows the sensor to acquire real-time displacement data of the motor shaft, thereby calculating the size of the axial clearance and measuring the real-time change in the axial distance between the motor shaft (rotor and stator), thus accurately obtaining the size of the axial clearance.

[0038] Laser displacement sensors play a crucial role in measuring the axial clearance of aircraft DC motors. As a core power component of aircraft, the stability and reliability of aircraft DC motors directly affect the safe operation of the entire aircraft. Axial clearance, as one of the important indicators for evaluating motor performance, is essential for ensuring the normal operation of the motor. Firstly, environmental factors have a significant impact on the measurement accuracy of laser displacement sensors. In the aviation field, factors such as temperature changes, vibration, and noise are unavoidable. These environmental factors may cause thermal expansion or contraction within the sensor, thus affecting the stability and accuracy of the laser beam. Therefore, in practical applications, measures can be taken to control the impact of environmental factors on the measurement results, such as using temperature control equipment and installing vibration damping devices between the sensor mounting device and the base plate, or on the base plate itself.

[0039] Secondly, equipment factors are also crucial in affecting the measurement accuracy of laser displacement sensors. The quality of the laser beam, the quality of the optical components, and factors such as equipment calibration and aging can all influence the measurement results. Therefore, when selecting a laser displacement sensor, it is essential to ensure that it possesses high quality and stability. Furthermore, regular equipment calibration and maintenance are also vital steps in ensuring measurement accuracy.

[0040] Finally, operational factors also affect the measurement results. Incorrect operating procedures can lead to measurement errors. Therefore, when using a laser displacement sensor to measure the axial clearance of an aircraft DC motor, the operation manual should be strictly followed to avoid unnecessary vibrations or interference.

[0041] In summary, laser displacement sensors play a crucial role in measuring the axial clearance of aircraft DC motors. However, in practical applications, it is necessary to comprehensively consider the influence of multiple factors, including environmental, equipment, and operational factors, to ensure the accuracy and reliability of the measurement results. By continuously optimizing measurement conditions and methods, the application effect of laser displacement sensors in measuring the axial clearance of aircraft DC motors can be further improved.

[0042] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. An apparatus for measuring the axial gap of an aeronautical direct current starting motor, characterized in that, The device includes a base plate (1), on which a steering device for controlling the direction of the motor, a fixed bracket (4) for supporting the DC starter motor, and a clamping device for fixing the motor shaft of the DC starter motor are fixed. A sensor fixing device (8) for fixing a horizontal laser displacement sensor for measuring the axial clearance of the motor is also provided on the base plate (1). The axes of the steering device, the fixed bracket (4), the clamping device and the sensor fixing device (8) are located on the same axis.

2. The apparatus for measuring the axial gap of an aviation DC starting motor shaft according to claim 1, characterized in that, The fixed bracket (4) is a U-shaped bracket with a U-shaped opening on one side.

3. The apparatus for measuring the axial gap of an aviation DC starting motor shaft according to claim 2, characterized in that, The clamping device includes a fixing member (5) for fixing the motor shaft and a clamping member for clamping the motor shaft. The clamping member is placed on the fixing member (5) to clamp the end of the motor shaft.

4. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 3, characterized in that, The fastener (5) includes a fixing plate (51) and a first fixing support plate (52) and a second fixing support plate (53) for supporting the fixing plate (51). The first fixing support plate (52) and the second fixing support plate (53) are symmetrically arranged on both sides of the fixing plate (51) and fixed on the base plate (1). The fixing plate (51) has a through hole through which the motor shaft passes.

5. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 4, characterized in that, The clamping component includes a detachable fixing clamp (6) and a first clamp (7) embedded in the detachable fixing clamp (6) to clamp and fix the motor shaft. The detachable fixing clamp (6) is placed on the first fixing support plate (52). The detachable fixing clamp (6) has a slot (64) aligned with the through hole. The first clamp (7) is embedded in the slot (64) and has a motor shaft fixing hole aligned with the through hole.

6. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 5, characterized in that, The detachable fixing clamp (6) includes an integrally formed fixing end (61) and a detachable clamping end (62). The fixing end (61) is fixed on the first fixing support plate (52). The detachable clamping end (62) includes a first clamping part (621) and a second clamping part (622) fixed by a connector (63). The first clamping part (621) and the fixing end (61) are integrally formed.

7. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 1, characterized in that, The steering device includes a support bracket (2) fixed on the base plate (1) and a control component (3) placed on the support bracket (2) to control the steering of the DC starter motor.

8. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 7, characterized in that, The support bracket is a triangular bracket with a perforation, and the control component (3) passes through the perforation and is connected to the motor shaft.

9. The measuring device for the axial clearance of an aircraft DC starter motor according to claim 7, characterized in that, The control component (3) includes a steering wheel (31), a power transmission shaft (32), and an adapter (33). The adapter (33) and the ball bearing (34) are both mounted on the motor shaft. One end of the guide retainer (35) is connected to the power transmission shaft (32), and the other end is fixed with the ball bearing (34). The motor shaft passes through the adapter (33), the ball bearing (34), and the support bracket in sequence and is connected to the power transmission shaft (32). The steering wheel (31) is fixed to the power transmission shaft (32).

Images