Integrated rotating shaft checking and measuring device

Abstract

The invention relates to an integrated rotating shaft checking and measuring device which comprises a phonic wheel, a metering box and a shaft sleeve, the shaft sleeve and the rotating shaft are fixedly connected together through a stop pin, the rotating shaft is arranged in a casing, the metering box and the casing are fixedly connected through a fastening assembly, the phonic wheel is fixedly connected with the rotating shaft, and a sensor is further embedded in the metering box. The surface of the metering box is further provided with a guide hole, the shaft sleeve is provided with a shaking guide hole, the inner wall face of the shaking guide hole is provided with a spline groove, and the central axis of the shaking guide hole coincides with the central axis of the guide hole. According to the technical scheme, the shaft sleeve and the rotating shaft are fixedly connected through the stop pin, the spline groove is formed in the shaft sleeve, the rotating shaft and the shaft sleeve are coaxially connected, and the overall appearance size of the device can be greatly reduced; a user can use a manual tool to check an internal mechanical structure or an assembly clearance of an aero-engine system in a narrow space.

Description

Technical Field

[0001] This invention belongs to the field of aviation engine fuel pump technology, and particularly relates to an integrated shaft inspection and measurement device. Background Technology

[0002] During the operation of an aero-engine system, regular inspections are required. On the one hand, the rotational speed of the aero-engine shaft needs to be monitored in real time during operation. Existing technologies generally use a sound wheel to monitor the rotational speed of the shaft. The sound wheel (1) rotates with the shaft (4), and the teeth on the outer circumference of the sound wheel (1) cut the magnetic field generated around the sensor (7), converting the rotational speed information of the shaft (4) into a sound signal, which is then transmitted to the user via the sensor (7). On the other hand, when the aero-engine stops running, it is also necessary to inspect the internal mechanical structure or assembly clearances of the aero-engine system. The inspection method is mainly to have the user apply a rotational torque to the shaft using a manual tool. During the slow rotation of the shaft, the user determines whether the internal mechanical structure or assembly clearances need to be repaired or maintained by listening to the sound emitted from inside the aero-engine system.

[0003] In the prior art, patent document with authorization announcement number "CN113959722B" discloses an integrated measurement device for torque-pitch-phase-speed based on a tone wheel, including a torsion spring shaft (10), a tone wheel component, a magnetic sensor (11), a signal processing module (12), and a data display module (13). The tone wheel component is mounted on a torsion spring shaft with a non-circular cross section, and one end face is fixedly connected to the β feedback rod of the propeller, which can realize the rotation and axial sliding motion of the tone wheel component on the torsion spring shaft. The signal processing module (12) can determine the propeller torque, pitch, phase angle, and speed based on the long delay, short delay, specific interval, and expected delay of the response signal of the magnetic sensor (11). Using this patented technical solution, a U-shaped torque tooth and a figure-eight shaped marking tooth are used. The torsion angle of the torque tooth reflects the torque, and the distance between the two marking teeth reflects the pitch. Furthermore, the two pairs of symmetrical teeth have the function of complementary correction of the magnetoelectric detection signal and reduction of imbalance, giving it dual sensitivity and good shaft dynamic balance characteristics.

[0004] However, existing research on the detection of various performance parameters of aero-engine systems mainly focuses on obtaining the corresponding performance parameters through advanced electronic technology. Moreover, the corresponding performance parameters can only be detected when the aero-engine system is running. When the aero-engine system is shut down, it is also necessary to check its mechanical structure or assembly clearances. In existing technologies, manual tools usually use gear mechanisms to mesh with shafts. The gear mechanism has a large external volume, which is not conducive to operation in confined spaces. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an integrated shaft inspection and measurement device.

[0006] This invention provides an integrated shaft inspection and measurement device, including a sound wheel, a measuring chamber, and a bushing. The bushing is fixedly connected to the shaft by a retaining pin. The shaft is disposed within a housing. The measuring chamber is fixedly connected to the housing by a fastening assembly. The sound wheel is fixedly connected to the shaft and housed within the measuring chamber. A sensor is also embedded inside the measuring chamber and is aligned with the outer peripheral surface of the sound wheel. The surface of the measuring chamber is provided with a guide hole. The bushing has a rocking hole. The inner wall of the rocking hole is provided with a spline groove, and the central axis of the rocking hole coincides with the central axis of the guide hole.

[0007] The surface of the rotating shaft is provided with a central through hole, and the bushing is fixedly connected inside the central through hole.

[0008] The central axis of the stop pin is perpendicular to the central axis of the rocker hole.

[0009] The integrated shaft inspection and measurement device also includes a plug, which is screwed into the guide hole.

[0010] The integrated shaft inspection and measurement device also includes an end sealing ring, which is sandwiched between the plug and the inner wall of the guide hole.

[0011] The integrated shaft inspection and measurement device also includes a limit nut and a stop washer. The surface of the sound wheel is provided with a limit groove. The limit nut is screwed to the outer circumferential surface of the shaft and is accommodated in the limit groove. The stop washer is sandwiched between the limit groove and the limit nut.

[0012] The fastening assembly includes a bolt and a self-locking nut, one end of the bolt is screwed to the housing, the other end of the bolt is screwed to the self-locking nut, and the bolt also passes through the metering housing.

[0013] The integrated shaft inspection and measurement device also includes a boundary seal ring, which is sandwiched between the housing and the measuring housing.

[0014] The integrated shaft inspection and measurement device also includes an adjusting washer. The housing is provided with a first positioning hole and a transition hole. A bushing is fitted inside the transition hole. The surface of the bushing is provided with a second positioning hole. The two ends of the shaft are respectively supported in the first positioning hole and the second positioning hole by ball bearings, and the adjusting washer is clamped between the first positioning hole and the ball bearing, and between the second positioning hole and the ball bearing.

[0015] The surface of the casing is also fitted with a locking pin, the end of which abuts against the surface of the ball bearing.

[0016] The beneficial effects of this invention are as follows: By using the technical solution provided by this invention, the bushing and the rotating shaft are fixedly connected by a retaining pin, and a spline groove is provided in the bushing to make the rotating shaft and the bushing coaxially connected. Compared with the prior art, the overall size of the device can be greatly reduced, allowing users to use manual tools to inspect the internal mechanical structure or assembly gaps of the aero-engine system in a confined space. In addition, this invention also makes the sound wheel coaxially connected to the rotating shaft, further reducing the size of the detection device and improving the degree of integration. When the aero-engine system is running, the rotational speed of the rotating shaft can be detected in real time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] In the diagram: 1-tone wheel, 2-metering box, 3-shaft sleeve, 4-rotating shaft, 5-stop pin, 6-casing, 7-sensor, 8-rocker hole, 9-through hole, 10-plug, 11-end seal ring, 12-limit nut, 13-stop washer, 14-bolt, 15-self-locking nut, 16-boundary seal ring, 17-adjusting washer, 18-shield, 19-ball bearing, 20-locking pin. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited thereto; This invention provides an integrated shaft inspection and measurement device, such as... Figure 1 As shown, the integrated rotating shaft inspection and measurement device includes a sound wheel 1, a measuring cartridge 2, and a bushing 3. The bushing 3 is fixedly connected to the rotating shaft 4 by a stop pin 5. The rotating shaft 4 is housed within a housing 6. The measuring cartridge 2 is fixedly connected to the housing 6 by a fastening assembly. The sound wheel 1 is fixedly connected to the rotating shaft 4 and is housed within the measuring cartridge 2. A sensor 7 is also embedded inside the measuring cartridge 2, and the sensor 7 is aligned with the outer circumferential surface of the sound wheel 1. The surface of the measuring cartridge 2 is also provided with a guide hole. The bushing 3 has a rocking hole 8, the inner wall of which is provided with a spline groove, and the central axis of the rocking hole 8 coincides with the central axis of the guide hole. The sound wheel 1 rotates with the rotating shaft 4, and the teeth on the outer circumferential surface of the sound wheel 1 cut the magnetic field generated around the sensor 7, converting the rotational speed information of the rotating shaft 4 into a sound signal, which is then transmitted to the user via the sensor 7.

[0020] The technical solution provided by this invention uses a retaining pin to fix the bushing and the rotating shaft together, and a spline groove is provided in the bushing to make the rotating shaft and the bushing coaxially connected. Compared with the prior art, the overall size of the device can be greatly reduced, allowing users to use manual tools to inspect the internal mechanical structure or assembly gaps of the aero-engine system in a confined space. In addition, this invention also makes the sound wheel coaxially connected to the rotating shaft, further reducing the size of the detection device and improving the degree of integration. When the aero-engine system is running, the rotational speed of the rotating shaft can be detected in real time.

[0021] Specifically, the surface of the rotating shaft 4 is provided with a through hole 9, and the bushing 3 is fixedly connected to the through hole 9. The central axis of the stop pin 5 is perpendicular to the central axis of the rocker hole 8. The integrated rotating shaft inspection and measurement device also includes a plug 10, which is screwed into the guide hole. The integrated rotating shaft inspection and measurement device also includes an end sealing ring 11, which is clamped between the plug 10 and the inner wall of the guide hole. By adopting the technical solution of the present invention, when the aero-engine system is running, the rotational speed information of the rotating shaft is detected in real time by the sound wheel and sensors. At this time, it is not necessary to use manual tools to inspect its internal mechanical structure. The guide hole can be sealed with a plug, thereby avoiding accidental operation by unauthorized personnel.

[0022] In addition, the integrated shaft inspection and measurement device also includes a limiting nut 12 and a retaining washer 13. The surface of the sound wheel 1 is provided with a limiting groove. The limiting nut 12 is screwed to the outer peripheral surface of the shaft 4, and the limiting nut 12 is accommodated in the limiting groove. The retaining washer 13 is sandwiched between the limiting groove and the limiting nut 12. With the technical solution of the present invention, the retaining washer 13 is elastic. When the limiting nut 12 is screwed to the outer peripheral surface of the shaft 4, the limiting nut 12 generates a compressive force on both the retaining washer 13 and the limiting groove, thereby making the sound wheel and the shaft tightly connected.

[0023] Furthermore, the fastening assembly includes a bolt 14 and a self-locking nut 15. One end of the bolt 14 is screwed to the housing 6, and the other end of the bolt 14 is screwed to the self-locking nut 15. The bolt 14 also passes through the measuring cartridge 2. The integrated rotating shaft inspection and measuring device also includes a boundary seal 16, which is sandwiched between the housing 6 and the measuring cartridge 2.

[0024] Furthermore, the integrated shaft inspection and measurement device also includes an adjusting washer 17. The housing 6 has a first positioning hole and a transition hole. A bushing 18 is fitted inside the transition hole, and a second positioning hole is provided on the surface of the bushing 18. Both ends of the shaft 4 are supported in the first positioning hole and the second positioning hole respectively using ball bearings 19, with the adjusting washer 17 clamped between the first positioning hole and the ball bearing 19, and between the second positioning hole and the ball bearing 19. A locking pin 20 is also embedded on the surface of the housing 6, with the end of the locking pin 20 abutting against the surface of the ball bearing 19. Using the technical solution of this invention, the shaft is supported by ball bearings, which can resist radial or axial loads, thereby improving the internal mechanical structure of the aero-engine system and stabilizing the shaft assembly structure. In addition, the adjusting washer is elastic, allowing the shaft to be further tightened, further stabilizing the mechanical structure of the aero-engine system.

Claims

1. An integrated shaft inspection and measurement device, characterized in that: The device includes a tone wheel (1), a metering box (2), and a bushing (3). The bushing (3) is fixedly connected to the rotating shaft (4) by a stop pin (5). The rotating shaft (4) is located inside the housing (6). The metering box (2) is fixedly connected to the housing (6) by a fastening assembly. The tone wheel (1) is fixedly connected to the rotating shaft (4), and the tone wheel (1) is housed inside the metering box (2). A sensor (7) is also embedded inside the metering box (2), and the sensor (7) is aligned with the outer peripheral surface of the tone wheel (1). The surface of the metering box (2) is also provided with a guide hole. The bushing (3) has a rocking hole (8). The inner wall of the rocking hole (8) is provided with a spline groove, and the central axis of the rocking hole (8) coincides with the central axis of the guide hole.

2. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The surface of the rotating shaft (4) is provided with a central through hole (9), and the bushing (3) is fixedly connected in the central through hole (9).

3. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The central axis of the stop pin (5) is perpendicular to the central axis of the rocker hole (8).

4. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The integrated shaft inspection and measurement device also includes a plug (10), which is screwed into the guide hole.

5. The integrated shaft inspection and measurement device as described in claim 4, characterized in that: The integrated rotating shaft inspection and measurement device also includes an end seal ring (11), which is sandwiched between the plug (10) and the inner wall of the guide hole.

6. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The integrated rotating shaft inspection and measurement device also includes a limiting nut (12) and a stop washer (13). The surface of the sound wheel (1) is provided with a limiting groove. The limiting nut (12) is screwed to the outer circumferential surface of the rotating shaft (4), and the limiting nut (12) is accommodated in the limiting groove. The stop washer (13) is sandwiched between the limiting groove and the limiting nut (12).

7. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The fastening assembly includes a bolt (14) and a self-locking nut (15), one end of the bolt (14) being screwed to the housing (6), the other end of the bolt (14) being screwed to the self-locking nut (15), and the bolt (14) also penetrating the metering housing (2).

8. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The integrated rotating shaft inspection and measurement device also includes a boundary seal (16), which is sandwiched between the housing (6) and the measuring housing (2).

9. The integrated shaft inspection and measurement device as described in claim 1, characterized in that: The integrated shaft inspection and measurement device also includes an adjusting washer (17). The housing (6) is provided with a first positioning hole and a transition hole. A bushing (18) is fitted inside the transition hole. A second positioning hole is provided on the surface of the bushing (18). The two ends of the shaft (4) are supported in the first positioning hole and the second positioning hole by ball bearings (19) respectively. The adjusting washer (17) is clamped between the first positioning hole and the ball bearing (19) and between the second positioning hole and the ball bearing (19).

10. The integrated shaft inspection and measurement device as described in claim 9, characterized in that: The surface of the casing (6) is also fitted with a locking pin (20), the end of which abuts against the surface of the ball bearing (19).

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