A centering tool for a regulating seat of an aircraft bleed valve

Abstract

The application discloses a centering positioning tool for a centering seat of an aircraft bleed air valve, which comprises a base including a manual rotating cylinder and a positioning column, the positioning column is provided with a centering hole, the outer wall of the positioning column is provided with external threads, the positioning column is inserted into a mounting hole in a regulator module in use, the positioning column is coaxial with the mounting hole, and the external threads are connected with internal threads at the hole opening of the mounting hole; a guide rod is slidably arranged in the centering hole, the outer wall of the guide rod is tightly attached to the inner wall of the centering hole, the outer end edge of the guide rod is provided with a positioning chamfer, and the positioning chamfer is used for cooperating with a sealing chamfer on the centering seat; a spring is arranged in the interior of the manual rotating cylinder, one end of the spring is connected to a limiting connection mechanism, the end of the spring is connected to the inner end of the guide rod, the other end of the spring is connected to a rotating connection mechanism, and the spring can rotate relative to the manual rotating cylinder. The mounting hole of the regulator module of the aircraft bleed air valve is used as a positioning reference, and the centering seat is positioned, so that the installation can be quickly and efficiently completed, and subsequent repeated disassembly and assembly are avoided.

Description

Technical Field

[0001] This invention relates to aircraft maintenance tooling, specifically to a centering tooling for the adjusting seat of an aircraft bleed air valve. Background Technology

[0002] The assembly precision of the regulator module of the bleed air valve (PRV) of existing civil aircraft directly affects the valve's adjustment function, including the assembly precision of the regulator seat, lifting rod, and fixing nut in the regulator module.

[0003] like Figure 3 and Figure 4 The diagram shows a cross-sectional view of the adjusting seat 101, lifting rod 108, and fixing nut 102 in the regulator module 100. The regulator module 100 has a mounting hole 104 that extends vertically through the regulator module 100. The adjusting seat 101 is inserted into the lower end of the mounting hole 104 and connected to the fixing nut 102, which fixes the adjusting seat 101. The lifting rod 108, together with the sleeve 106 fitted on it, is inserted into the upper end of the mounting hole 104. A limiting nut 107 is fitted on the sleeve 106, and the limiting nut 107 engages with the internal thread 105 at the upper end of the mounting hole 104. The upper end of the adjusting seat 101 and the lower end of the lifting rod 108 are respectively provided with sealing chamfers 103, which cooperate with each other. During assembly, the center of the adjusting seat 101, the lifting rod 108 and the mounting hole 104 need to be aligned. The accuracy of the alignment will affect the performance of the regulator module 100. If there is a deviation, it will lead to air leakage, causing the regulator module 100 to fail to adjust.

[0004] The current practice is to insert the adjusting seat 101 into the mounting hole 104, visually adjust the center position of the adjusting seat 101, tighten the fixing nut 102, then install the lifting rod 108, and finally test the regulator module 100 to verify whether its performance meets the standards.

[0005] However, the adjusting seat 101 and the mounting hole 104 are clearance fits, with a gap of more than 1mm between the outer wall of the adjusting seat 101 and the inner wall of the mounting hole 104. This makes it difficult to align the center of the adjusting seat 101 with the center of the mounting hole 104 when installing the adjusting seat 101 using the fixing nut 102. This also causes a certain degree of misalignment between the center of the subsequently installed lifting rod 108 and the center of the adjusting seat 101, resulting in a misalignment between the sealing chamfer 103 of the adjusting seat 101 and the sealing chamfer 103 of the lifting rod 108. This deviation affects the sealing performance and leads to air leakage, requiring disassembly and reinstallation. In actual assembly, this often requires repeated disassembly and reassembly multiple times to achieve compliance with standards and seaworthiness. The entire assembly process is both time-consuming and labor-intensive. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a centering positioning fixture for the adjusting seat in an aircraft bleed air valve. The fixture uses the mounting hole of the adjusting module of the aircraft bleed air valve as the positioning reference to position the adjusting seat, which can achieve quick and efficient installation and avoid repeated disassembly and assembly.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A centering positioning fixture for the adjusting seat of an aircraft bleed air valve, characterized in that it comprises:

[0009] The base includes a manual rotating drum and a positioning post coaxially located at one end of the manual rotating drum. The positioning post has a central hole that passes through it and an external thread on its outer wall. When in use, the positioning post is inserted into the mounting hole in the regulator module of the aircraft bleed air valve. The positioning post is coaxial with the mounting hole, and the external thread is connected to the internal thread at the opening of the mounting hole.

[0010] The guide rod slides through the central hole, with its outer wall tightly fitting the inner wall of the central hole. Its inner end inserts into the inside of the manual rotating drum, and its outer edge is provided with a positioning chamfer, which is used to cooperate with the sealing chamfer on the adjusting seat.

[0011] The limiting connection mechanism is located at the inner end of the guide rod;

[0012] The rotating connection mechanism is located at the end of the manual rotating drum away from the guide rod;

[0013] A spring is located inside the manual rotating drum. One end of the spring is connected to the limiting connection mechanism, so that the end of the spring is connected to the inner end of the guide rod, and the other end is connected to the rotating connection mechanism, so that the spring can rotate relative to the manual rotating drum.

[0014] Optionally, the limiting connection mechanism includes a washer and a locking nut. The washer has a limiting frustum in the middle, the inner end of the guide rod has a threaded post and a shoulder, the washer is fitted on the inner end of the guide rod and abuts against the shoulder, the locking nut is threadedly connected to the threaded post, the washer is locked between the locking nut and the shoulder, and the end of the spring is fitted on the limiting frustum.

[0015] Optionally, the rotating connection mechanism includes a lubricating washer and a double-ended pad. The lubricating washer is located at the end of the manual rotating drum away from the guide rod. The two ends of the double-ended pad are respectively provided with turntables. The turntable at one end of the double-ended pad is fitted into the middle hole of the lubricating washer, and the double-ended pad can rotate relative to the lubricating washer. The end of the spring is correspondingly sleeved on the turntable at the other end of the double-ended pad.

[0016] Optionally, the rotating connection mechanism also includes a cover plate, which is installed at the end of the manual rotary drum away from the guide rod. The cover plate has a circular groove inside, and a lubrication washer is embedded in the circular groove.

[0017] Optionally, the end of the manual rotary drum away from the guide rod is provided with a retaining ring groove, in which an inner retaining ring is inserted, and the outer edge of the cover plate abuts against the inner retaining ring.

[0018] Optionally, the outer wall of the manual rotary drum is provided with an outer ring, and the side of the outer ring is knurled.

[0019] Optionally, the locking nut is a hexagonal nut.

[0020] Optionally, the lubrication gasket is a Teflon gasket.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention connects the external thread on the positioning pin with the internal thread at the opening of the mounting hole in the regulator module. Using the mounting hole as a positioning reference, the center of the positioning pin, the center of the guide rod, and the center of the mounting hole are fixedly aligned. During the installation of the adjusting seat in the regulator module, the not-yet-fully-fixed adjusting seat automatically adjusts its position through the interaction of its sealing chamfer and the positioning chamfer of the guide rod. When fully fixed, the center of the adjusting seat automatically aligns with the center of the guide rod, and thus with the center of the mounting hole. After the center of the adjusting seat is precisely adjusted, the center of the lifting rod, subsequently installed via the sleeve and limit nut, is also perfectly aligned with the center of the adjusting seat because it is aligned with the center of the mounting hole. This ensures a tight fit between the sealing chamfers of the adjusting seat and the lifting rod, meeting standards and achieving seaworthiness. Therefore, this invention makes regulator module assembly easier and more efficient, avoiding repeated disassembly and reassembly.

[0023] Furthermore, the guide rod of this invention is installed via a special structure, with its inner end mounted through a limiting connection mechanism, a spring, and a rotating connection mechanism, enabling the guide rod to elastically retract inward and rotate freely. When installing the adjustment seat in the aircraft's regulator module, during the tightening of the fixing nut, relative sliding friction is unlikely to occur between the adjustment seat and the guide rod, preventing excessive force exerted by the guide rod on the adjustment seat and protecting it to ensure the integrity of the adjustment seat's surface performance. Attached Figure Description

[0024] Figure 1 This is a cross-sectional schematic diagram of the centering positioning fixture of the present invention;

[0025] Figure 2 This is a cross-sectional view of the centering positioning fixture of the present invention when disassembled;

[0026] Figure 3 This is a cross-sectional view of the regulating seat and fixing nut of the bleed air valve regulator module of an aircraft when they are installed in their mounting holes.

[0027] Figure 4 This is a cross-sectional view of the regulating seat, fixing nut, lifting rod, sleeve and limit nut of the regulating module of the bleed air valve of an aircraft when they are installed in their mounting holes.

[0028] Figure 5 This is a cross-sectional schematic diagram of the centering fixture of the present invention used to position the center of the adjusting seat.

[0029] Meaning of the labels in the attached diagram:

[0030] 1-Base; 1.1-Positioning pin; 1.2-Center hole; 1.3-External thread; 1.4-Manual rotary drum; 1.5-Outer ring; 1.6-Knurled; 1.7-Snap ring groove; 2-Guide rod; 2.1-Shoulder; 2.2-Threaded pin; 2.3-Positioning chamfer; 3-Washer; 3.1-Limiting frustum; 4-Locking nut; 5-Spring; 6-Double-ended pad; 6.1-Turntable; 7-Lubricating washer; 8-Cover plate; 8.1-Circular groove; 9-Internal snap ring; 100-Adjuster module; 101-Adjusting seat; 102-Fixing nut; 103-Sealing chamfer; 104-Mounting hole; 105-Internal thread; 106-Sleeve; 107-Limiting nut; 108-Lifting rod. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0033] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0035] Example:

[0036] like Figure 1 and Figure 2 The figure shown is a centering positioning fixture for the adjusting seat of the aircraft bleed air valve in this embodiment, which includes a base 1, a guide rod 2, a limiting connection mechanism, a rotating connection mechanism, and a spring 5.

[0037] The base 1 includes a manual rotating cylinder 1.4 and a positioning post 1.1. The positioning post 1.1 is located at one end of the manual rotating cylinder 1.4, and the two are connected as one unit, with the positioning post 1.1 and the manual rotating cylinder 1.4 being coaxial. The internal space of the manual rotating cylinder 1.4 is used for installing components, and the end of the manual rotating cylinder 1.4 away from the positioning post 1.1 is open. An outer ring 1.5 is provided on the outer wall of the manual rotating cylinder 1.4, and knurling 1.6 is provided on the side of the outer ring 1.5, which allows the user to easily rotate the manual rotating cylinder 1.4 manually.

[0038] The positioning post 1.1 has a central hole 1.2 that penetrates through it, connecting to the internal space of the manual rotating drum 1.4. The outer wall of the positioning post 1.1 has an external thread 1.3, which is coaxial with the central hole 1.2. In use, the positioning post 1.1 is inserted into the mounting hole 104 in the regulator module of the aircraft bleed air valve. The positioning post 1.1 is coaxial with the mounting hole 104, and the external thread 1.3 engages with the internal thread 105 at the opening of the mounting hole 104, thus using the mounting hole 104 as a positioning reference, ensuring that the center of the centered positioning fixture is fixedly aligned with the center of the mounting hole 104.

[0039] The guide rod 2 slides through the central hole 1.2, with its outer wall tightly fitted to the inner wall of the central hole 1.2, meaning there is virtually no gap. The inner end of the guide rod 2 inserts into the interior of the manual rotating drum 1.4, and its outer end extends to the outer edge of the central hole 1.2. The outer edge of the guide rod 2 is provided with a positioning chamfer 2.3, which is used to cooperate with the sealing chamfer 103 on the adjusting seat 101. The cooperation between the positioning chamfer 2.3 and the sealing chamfer 103 aligns the center of the guide rod 2 with the center of the adjusting seat 101.

[0040] A limiting connection mechanism is located at the inner end of the guide rod 2, and a rotating connection mechanism is located at the end of the manual rotating cylinder 1.4 furthest from the guide rod 2. A spring 5 is located inside the manual rotating cylinder 1.4 and is installed via the limiting connection mechanism and the rotating connection mechanism. One end of the spring 5 is connected to the limiting connection mechanism, so that the end of the spring 5 is connected to the inner end of the guide rod 2. The other end of the spring 5 is connected to the rotating connection mechanism, allowing the spring 5 to rotate relative to the manual rotating cylinder 1.4. The installation of the guide rod 2 via the limiting connection mechanism, the spring 5, and the rotating connection mechanism enables the guide rod 2 to have the functions of elastic inward contraction and free rotation. When installing the adjusting seat 101 in the aircraft's regulator module 100, during the process of tightening the fixing nut 102 inward, relative sliding friction is unlikely to occur between the adjusting seat 101 and the guide rod 2. The force exerted by the guide rod 2 on the adjusting seat 101 will not be excessive, thus protecting the adjusting seat 101 and ensuring the integrity of its surface performance.

[0041] The specific structure of the limiting connection mechanism in this embodiment is as follows: it includes a washer 3 and a locking nut 4. The washer 3 has a limiting frustum 3.1 in the middle and a through hole in the middle. The inner end of the guide rod 2 has a threaded post 2.2 and a shoulder 2.1. The washer 3 is fitted onto the inner end of the guide rod 2 through its through hole and abuts against the shoulder 2.1. The locking nut 4 is threaded onto the threaded post 2.2. The washer 3 is locked between the locking nut 4 and the shoulder 2.1. The limiting frustum 3.1 faces the spring 5. The diameter of the limiting frustum 3.1 is adapted to the inner diameter of the spring 5. The end of the spring 5 is fitted onto the limiting frustum 3.1, thereby limiting the connection of the end of the spring 5. The locking nut 4 is a hexagonal nut.

[0042] The specific structure of the rotating connection mechanism in this embodiment is as follows: it includes a lubricating washer 7, a double-ended pad 6, and a cover plate 8. The cover plate 8 is installed at the end of the manual rotating drum 1.4 away from the guide rod 2. The cover plate 8 has a circular groove 8.1 inside, and the lubricating washer 7 is embedded in the circular groove 8.1, thereby installing the lubricating washer 7 at the end of the manual rotating drum 1.4 away from the guide rod 2. The double-ended pad 6 has a turntable 6.1 at each end. The turntable 6.1 at one end of the double-ended pad 6 fits into the middle hole of the lubricating washer 7, allowing the double-ended pad 6 to rotate relative to the lubricating washer 7. The end of the spring 5 is correspondingly sleeved on the turntable 6.1 at the other end of the double-ended pad 6. The lubricating washer 7 has a lubricating function, allowing the spring 5 to rotate relative to the cover plate 8, that is, relative to the base 1.

[0043] Among them, the lubricating washer 7 can be a Teflon washer, which gives it a smooth surface and achieves a lubrication effect.

[0044] The installation structure of the cover plate 8 is as follows: the end of the manual rotating cylinder 1.4 away from the guide rod 2 is provided with a retaining ring groove 1.7, and an inner hole retaining ring 9 is inserted into the retaining ring groove 1.7. The outer edge of the cover plate 8 abuts against the inner hole retaining ring 9. Under the action of the spring 5, the cover plate 8 will be pressed tightly against the inner hole retaining ring 9.

[0045] The usage process of this centering positioning fixture is as follows:

[0046] First, insert the adjusting seat 101 of the bleed air valve regulator module 100 into the hole at one end of the mounting hole 104 for installing the adjusting seat 101. Then, install the fixing nut 102, but do not tighten the fixing nut 102 at this time, so that the adjusting seat 101 can still move freely. Next, insert the centering positioning fixture into the hole at one end of the mounting hole 104 for installing the lifting rod 108. The positioning pin 1.1 is inserted into the mounting hole 104. Manually rotate the manual rotating cylinder 1.4 so that the external thread 1.3 on the positioning pin 1.1 is connected with the internal thread 105 at the hole of the mounting hole 104, thereby fixing and aligning the center of the centering positioning fixture with the center of the mounting hole 104. Figure 5 As shown; then, rotate the fixing nut 102 and gradually tighten it to fix the adjusting seat 101. During the fixing process, the position of the adjusting seat 101 will be automatically adjusted by the interaction between the sealing chamfer 103 of the adjusting seat 101 and the positioning chamfer 2.3 of the guide rod 2 until the adjusting seat 101 is completely fixed. At this time, the center of the adjusting seat 101 will automatically align with the center of the guide rod 2, which will also align with the center of the mounting hole 104. After that, remove the centering positioning fixture from the adjuster module 100, put the sleeve 106 on the lifting rod 108 and put on the upper limit nut 107, and put the lifting rod 108 into the mounting hole 104 of the adjuster module 100. The center of the lifting rod 108 will be completely aligned with the center of the adjusting seat 101, so that the sealing chamfer 103 of the adjusting seat 101 and the lifting rod 108 can fit tightly, meet the standard, and reach the seaworthiness state.

[0047] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A centering positioning fixture for the adjusting seat in an aircraft bleed air valve, characterized in that, include: The base includes a manual rotating drum and a positioning post coaxially disposed at one end of the manual rotating drum. The positioning post has a central hole through it and an external thread on its outer wall. When in use, the positioning post is inserted into the mounting hole in the regulator module of the aircraft bleed air valve. The positioning post is coaxial with the mounting hole, and the external thread is connected to the internal thread at the opening of the mounting hole. The guide rod slides through the central hole, with its outer wall tightly fitting the inner wall of the central hole. Its inner end penetrates into the interior of the manual rotating drum, and its outer edge is provided with a positioning chamfer, which is used to cooperate with the sealing chamfer on the adjusting seat. A limiting connection mechanism is located at the inner end of the guide rod; A rotating connection mechanism is located at the end of the manually operated rotary drum away from the guide rod; A spring is located inside the manual rotating drum, with one end connected to the limiting connection mechanism, such that the end of the spring is connected to the inner end of the guide rod, and the other end is connected to the rotating connection mechanism, so that the spring can rotate relative to the manual rotating drum. The limiting connection mechanism includes a washer and a locking nut. The washer has a limiting frustum in the middle. The inner end of the guide rod has a threaded post and a shoulder. The washer is fitted on the inner end of the guide rod and abuts against the shoulder. The locking nut is threaded on the threaded post. The washer is locked between the locking nut and the shoulder. The end of the spring is fitted on the limiting frustum. The rotating connection mechanism includes a lubricating washer and a double-ended pad. The lubricating washer is located at the end of the manual rotary drum away from the guide rod. The double-ended pad has a turntable at each end. The turntable at one end of the double-ended pad is fitted into the central hole of the lubricating washer. The double-ended pad can rotate relative to the lubricating washer. The end of the spring is correspondingly fitted onto the turntable at the other end of the double-ended pad.

2. The centering positioning fixture for the adjusting seat of the aircraft bleed air valve according to claim 1, characterized in that: The rotating connection mechanism also includes a cover plate, which is installed at the end of the manual rotary drum away from the guide rod. The cover plate has a circular groove inside, and the lubricating washer is embedded in the circular groove.

3. The centering positioning fixture for the adjusting seat of the aircraft bleed air valve according to claim 2, characterized in that: The manual rotary drum has a retaining ring groove at the end away from the guide rod, and an inner retaining ring is inserted into the retaining ring groove. The outer edge of the cover plate abuts against the inner retaining ring.

4. The centering positioning fixture for the adjusting seat of the aircraft bleed air valve according to claim 1, characterized in that: The manual rotary drum has an outer ring on its outer wall, and the side of the outer ring is knurled.

5. The centering positioning fixture for the adjusting seat of the aircraft bleed air valve according to claim 1, characterized in that: The locking nut is a hexagonal nut.

6. The centering positioning fixture for the adjusting seat of the aircraft bleed air valve according to claim 1, characterized in that: The lubricating gasket is a Teflon gasket.

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