Aero-engine pressure sensor connecting mechanism and aero-engine
By setting a stop washer at the end of the air pipe of the air pipe of the pressure sensor connection mechanism of the aircraft engine, the problem of poor connection quality in the prior art is solved, the solder overflow and blockage are avoided, and the connection quality and processing efficiency are improved.
Patent Information
- Application Number
- CN202421748017.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the prior art, the connection quality between the aircraft engine pressure sensor and the air pipe is poor, which easily leads to overflow and blockage of solder, causing safety hazards and reduced measurement accuracy.
A pressure sensor connection mechanism for the aircraft engine is designed to prevent solder from overflowing into the connecting channel by providing a stop washer at the end of the air pipe, ensuring the unobstructedness of the connecting channel.
It effectively avoids the problems of solder overflow and blockage, improves the connection quality and processing efficiency of the pressure sensor, and ensures the safety and measurement accuracy of the engine.
Smart Images
Figure CN222976915U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of installation of aero-engine pressure sensors, and particularly relates to a connecting mechanism for aero-engine pressure sensors and an aero-engine. Background Art
[0002] As the heart of an aircraft, an aero-engine plays an irreplaceable role in the independent research and development process of large aircraft.
[0003] To ensure the efficient operation and safety of an aero-engine, the application of sensors in aero-engines has become increasingly widespread. Among them, pressure sensors play an important role in the engine, such as measuring gas pressure, oil pressure, valve pressure, and so on.
[0004] At present, pressure sensors are mainly connected by means such as laser welding or brazing, which are common and effective methods in most structures. However, the use effect in some parts is not good, such as the connection between the mounting seat of the pressure sensing part and the pressure pipeline sensor.
[0005] Due to the huge difference in the heat conduction characteristics between the mounting seat and the pressure pipeline with a relatively thin wall thickness, if the laser welding process is used, it is easy to cause the mounting seat to not penetrate, and at the same time, the pressure pipeline is corroded by the welding high temperature; if the brazing process is used, it is easy to overflow the brazing material into the pipeline, causing blockage or the falling off of the overflowed brazing material, resulting in a major safety accident of engine damage.
[0006] Based on this, the applicant of the present utility model proposes a connecting mechanism for aero-engine pressure sensors and an aero-engine in order to solve the above technical problems. Content of the Utility Model
[0007] The technical problem to be solved by the present utility model is to overcome the defect of poor connection quality between the pressure sensing part and the air pipe in the prior art, and to provide a connecting mechanism for aero-engine pressure sensors and an aero-engine.
[0008] The present utility model solves the above technical problems through the following technical solutions:
[0009] The present utility model provides a connecting mechanism for aero-engine pressure sensors, which is characterized in that it includes: a mounting seat, on which a connecting channel is opened, one end of the mounting seat is mounted on a test piece, and the connecting channel is communicated with the inner cavity of the test piece;
[0010] An air pipe, inserted into the connecting channel, and the air pipe is connected to the mounting seat by brazing; wherein,
[0011] One end of the air pipe extending into the connection channel is provided with a stop washer, which is used to stop the solder between the air pipe and the mounting seat, so as to prevent the solder from overflowing into the connection channel and blocking the connection channel.
[0012] According to an embodiment of the present invention, one end of the stop washer abuts against the bottom of the stop groove.
[0013] According to an embodiment of the present invention, one end of the air pipe is in close contact with the stop washer.
[0014] According to an embodiment of the present invention, the bottom of the stop groove is a plane.
[0015] According to an embodiment of the present invention, the stop washer is a ceramic stop ring.
[0016] According to an embodiment of the present invention, the stop washer is an alumina stop ring.
[0017] According to an embodiment of the present invention, the air pipe and the mounting seat are connected by furnace brazing.
[0018] According to an embodiment of the present invention, the inner diameter of the air pipe is the same as the inner diameter of the connection channel.
[0019] The present invention also provides an aeroengine, which is characterized in that it includes the aeroengine pressure sensor connection mechanism as described above.
[0020] The positive and progressive effects of the present invention are as follows:
[0021] For the aeroengine pressure sensor connection mechanism of the present invention, a stop washer is arranged at one end of the air pipe extending into the connection channel. Thus, during brazing, the problem that the solder overflows into the connection channel and causes blockage of the connection channel or the falling off of the overflowing solder can be avoided, which improves the product processing efficiency and the high-quality connection of the pressure sensor, and is economical, practical and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other features, properties and advantages of the present invention will become more obvious through the following description with reference to the drawings and embodiments, in which:
[0023] Figure 1 is a schematic structural diagram of the aeroengine pressure sensor connection mechanism of the present invention.
[0024] 1. Mounting seat; 11. Connection channel; 12. Stop groove;
[0025] 2. Air pipe; 21. Stop washer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The present utility model will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are elaborated in the following description to facilitate a full understanding of the present utility model. However, the present utility model can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without violating the connotation of the present utility model. Therefore, the protection scope of the present utility model should not be limited by the content of this specific embodiment.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings description are intended to cover non-exclusive inclusion.
[0028] Please refer to Figure 1 , the present utility model provides a connecting mechanism for an aero-engine pressure sensor, which includes a mounting base 1 and an air pipe 2. A connecting channel 11 is provided on the mounting base 1. One end of the mounting base 1 is mounted on a test piece, and the connecting channel 11 communicates with the inner cavity of the test piece. The air pipe 2 is inserted into the connecting channel 11, and the air pipe 2 is connected to the mounting base 1 by brazing. Among them, a stop washer 21 is provided at one end of the air pipe 2 extending into the connecting channel 11. The stop washer 21 is used to stop the brazing filler metal between the air pipe 2 and the mounting base 1 to prevent the brazing filler metal from overflowing into the connecting channel 11 and causing blockage of the connecting channel 11.
[0029] During the brazing process, the overflow of the brazing filler metal is very common. Moreover, the connecting channel 11 of the mounting base 1 is connected to the inner cavity of the test piece. Once the brazing filler metal overflows, the brazing filler metal is likely to fall into the inner cavity of the test piece, which will pose a certain safety hazard to the engine. Moreover, too much overflowing brazing filler metal entering the air pipe 2 will also cause blockage of the air pipe 2 and affect the measurement accuracy of the pressure sensor.
[0030] This application provides a stop washer 21 at one end of the air pipe 2 extending into the connecting channel 11. The stop washer 21 can prevent the overflow of the brazing filler metal and ensure the safe use of the engine and the pressure sensor.
[0031] It can be seen that the stop washer 21 and the air pipe 2 can be pre-connected, such as by bonding or clamping, etc. Then, the stop washer 21 and the air pipe 2 are inserted into the connecting channel 11 together. At this time, the circumferential side wall of the stop washer 21 is in interference fit with the inner wall of the connecting pipe, so as to ensure that the brazing filler metal will not overflow when the air pipe 2 and the mounting base 1 are brazed.
[0032] Alternatively, the stop washer 21 and the air pipe 2 can also be separately provided. The specific implementation can be referred to as follows:
[0033] A stop groove 12 is formed at one end of the connection channel 11 away from the component to be measured. The circumferential dimension of the stop groove 12 is larger than that of the connection channel 11, and the air pipe 2 is inserted into the stop groove 12.
[0034] Optionally, the cross-sectional shapes of the stop groove 12 and the connection channel 11 are both circular and the stop groove 12 is coaxial with the connection channel 11. The bottom of the stop groove 12 is used to place the stop washer 21 to prevent the stop washer 21 from detaching from the connection channel 11.
[0035] Specifically, the circumferential side wall of the stop washer 21 can be in contact with the circumferential groove wall of the stop groove 12, so that the solder between the outside of the air pipe 2 and the circumferential side wall of the stop groove 12 cannot flow into the connection channel 11.
[0036] Moreover, one end of the air pipe 2 is in close contact with the stop washer 21. Preferably, the inner diameter of the air pipe 2 is the same as the inner diameter of the connection channel 11.
[0037] During actual installation, the stop washer 21 can be first placed into the connection channel 11 and reach the bottom of the stop groove 12 under the push of the air pipe 2 and form a tight contact with the bottom of the groove. In this way, under the blocking action of the stop washer 21, the solder between the outside of the air pipe 2 and the circumferential side wall of the stop groove 12 cannot overflow into the connection channel 11.
[0038] Setting the inner diameter of the air pipe 2 to be the same as the inner diameter of the connection channel 11 can ensure the stable flow of gas and improve the stability of the pressure sensor detection.
[0039] It should be noted that the bottom of the stop groove 12 is a plane. In this way, it can be ensured that the solder will not flow into the connection channel 11. It should be noted that the bottom of the stop groove 12 can also be an inclined plane, but the inclination angle should be in the direction away from the component to be measured.
[0040] Preferably, a receiving groove can also be formed at the bottom of the stop groove 12 so that the stop washer 21 is clamped in the receiving groove, which can further improve the blocking effect of the stop washer 21.
[0041] In one embodiment, the stop washer 21 is a ceramic stop ring.
[0042] In some other embodiments, the stop washer 21 is an alumina stop ring.
[0043] That is, the present application uses a ceramic ring as a flow inhibitor, and a ring made of alumina can be selected to replace the ceramic ring.
[0044] In one embodiment, the air pipe 2 and the mounting base 1 are connected by furnace brazing. In some other embodiments, flame brazing can also be used between the air pipe 2 and the mounting base 1, and the specific brazing method is not limited herein.
[0045] The specific implementation process of this application is as follows:
[0046] First, prepare an air pipe 2 with a wall thickness of 0.2 mm and an outer diameter of 1.5 mm, a mounting base 1, and a stop washer 21 before welding. Then, use non-woven fabric dipped in acetone to clean the surfaces of the air pipe 2 and the area to be welded to ensure there are no oil stains or impurities.
[0047] Secondly, use the air pipe 2 to push the stop washer 21 to the bottom of the stop groove 12, apply brazing filler metal on the outside of the air pipe 2, and dry it for welding.
[0048] Then, place the parts in a vacuum furnace and keep them at 1050 °C for 25 minutes.
[0049] Finally, visually inspect the surface quality of the weld.
[0050] The present utility model uses the stop washer 21 as a flow restrictor to limit the overflow of brazing filler metal into the connection channel 11, thereby solving the problems of pipeline blockage or shedding of overflowed brazing filler metal.
[0051] The connection mechanism of this application is simple to operate. Using the ceramic ring as a flow restrictor, only by placing the ceramic ring at the bottom of the stop groove 12 can the overflow of brazing filler metal be prevented.
[0052] The connection mechanism of this application is economical and practical. The ceramic stop washer and the alumina stop ring are low-cost, but can efficiently and highly solve the problems of brazing filler metal overflow and shedding, reduce the brazing filler metal overflow cleaning process, and improve the product processing efficiency.
[0053] The connection mechanism of this application has a wide range of applications. It is not limited to the processing of aero-engine pressure sensors, but can also be adapted to other application environments for preventing overflow, with better versatility.
[0054] The present utility model also proposes an aero-engine, including the above-mentioned aero-engine pressure sensor connection mechanism.
[0055] The target to be measured can be gas pressure, oil pressure, valve pressure, etc., which is not limited herein.
[0056] In summary, for the aero-engine pressure sensor connection mechanism of the present utility model, a stop washer 21 is provided at one end of the air pipe 2 extending into the connection channel 11. Thus, during brazing, the problem of the connection channel 11 being blocked or the overflowed brazing filler metal shedding due to the overflow of brazing filler metal into the connection channel 11 can be avoided. While improving the product processing efficiency, the connection quality of the pressure sensor is also improved. It is economical, practical, and has a wide range of applications.
[0057] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not required.
[0058] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "install", "connect", "couple", "fix", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0059] The present application uses specific words to describe the embodiments of the present application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification is not necessarily referring to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.
[0060] Although the present utility model is disclosed above in its preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present utility model. Therefore, any modification, equivalent change, and embellishment made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model all fall within the protection scope defined by the claims of the present utility model.
Claims
1. An aircraft engine pressure sensor connection mechanism, characterized in that: include: A mounting seat, on which a connecting passage is provided, one end of the mounting seat is mounted on the piece to be tested, and the connecting passage is communicated with the inner chamber of the piece to be tested; An air pipe is inserted into the connecting channel, and the air pipe is connected to the mounting seat by brazing; wherein, A stop washer is provided at one end of the air pipe extending into the connecting channel, and the stop washer is used to stop the solder between the air pipe and the mounting seat to prevent the solder from overflowing into the connecting channel and clogging the connecting channel.
2. The aircraft engine pressure sensor connection mechanism according to claim 1, characterized in that: The connecting channel is provided with a stop groove at one end away from the test piece, the circumferential dimension of the stop groove is larger than the circumferential dimension of the connecting channel, and the air pipe is inserted into the stop groove.
3. The aircraft engine pressure sensor connection mechanism according to claim 2, characterized in that: One end of the stop washer abuts against the bottom of the stop groove.
4. The aircraft engine pressure sensor connection mechanism according to claim 2, characterized in that: One end of the air pipe is in close contact with the stop washer.
5. The aircraft engine pressure sensor connection mechanism according to claim 2, characterized in that: The bottom of the stop groove is a plane.
6. The aircraft engine pressure sensor connection mechanism according to claim 1, characterized in that: The stop washer is a ceramic stop ring.
7. The aircraft engine pressure sensor connection mechanism according to claim 1, characterized in that: The stop washer is an aluminum oxide stop ring.
8. The aircraft engine pressure sensor connection mechanism according to claim 1, characterized in that: The air pipe and the mounting seat are connected by furnace brazing.
9. The aircraft engine pressure sensor connection mechanism according to claim 1, characterized in that: The inner diameter of the air pipe is consistent with the inner diameter of the connecting channel.
10. An aircraft engine, characterized in that: It comprises an aircraft engine pressure sensor connecting mechanism as described in any one of claims 1 to 9.