A free swing inspection device and method for an aviation accessory rotating oil suction mechanism

Abstract

This invention discloses a device and method for inspecting the free swing of a rotary oil suction mechanism for aircraft accessories, belonging to the field of process tooling technology. This invention aims to solve the technical problem that existing manual methods cannot accurately pull the rotary oil suction mechanism to a position of (90±5)° to check the number of swings, leading to inaccurate test results. The device of this invention includes a base and a fixing mechanism and a positioning mechanism mounted thereon; the fixing mechanism is used to fix the rotary oil suction mechanism to be tested; the positioning mechanism includes a slider movably mounted on the base, with two face positioning blocks on the slider, forming an angle of (90±5)° between the two face positioning blocks. The method of use is as follows: fix the rotary oil suction mechanism on the fixing mechanism; move the slider so that its rotating component enters between the two face positioning blocks and is limited to a preset angle; move the slider in the opposite direction to release the rotary oil suction mechanism; observe and record its number of free swings. This invention can achieve precise positioning of the release angle of the rotary oil suction mechanism, ensuring the accuracy and consistency of the test results, is easy to operate, and effectively guarantees the working reliability of the aircraft engine accessory transmission system.

Description

Technical Field

[0001] This invention belongs to the field of process tooling technology, specifically relating to a device and method for inspecting the free swing of an aviation accessory rotary oil suction mechanism. Background Technology

[0002] The rotary oil suction mechanism is a core component of the aero-engine accessory transmission system. Its function is to continuously draw lubricating oil from the oil tank or sump and pressurize it to deliver it to the surfaces of moving parts such as gears and bearings in the transmission system, forming an oil film to reduce friction and wear. Simultaneously, the flowing lubricating oil carries away the heat generated by friction, preventing overheating and maintaining a stable system temperature. The operating state of the rotary oil suction mechanism directly affects the performance of the accessory transmission system and the entire engine. The optimal operating state depends on the mechanism being pulled to (90±5)° and allowed to fall naturally under gravity. The mechanism must swing at least six times to ensure that extreme conditions do not occur during operation, preventing insufficient oil pressure during high-speed rotation and subsequent lubrication failure.

[0003] Currently, after assembly, the rotary oil suction mechanism is typically inspected manually. The operator places the component flat on a platform, manually pulls the rotary oil suction mechanism to approximately level with the platform, and then releases it, allowing it to fall naturally. The operator then visually checks the number of swings. However, this existing method relies entirely on the operator's experience and feel, and cannot guarantee that the rotary oil suction mechanism will be pulled precisely to the specified position of (90±5)° each time. Due to the inaccurate initial release angle, the swing state during natural fall is inconsistent, resulting in inaccurate measured swing counts that fail to accurately reflect the mechanism's performance and pose significant quality risks. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for checking the free swing of an aviation accessory rotary oil suction mechanism, so as to solve the technical problem that it is currently impossible to pull the rotary oil suction mechanism to a precise position to check the number of swings, thereby reducing the probability of failure due to lubrication failure.

[0005] The technical solution of the present invention: In order to achieve the above objectives, according to a first aspect of the present invention, the present invention provides a free swing inspection device for an aviation accessory rotating oil suction mechanism, comprising a base, a lifting eye screw, and a fixing mechanism and a positioning mechanism mounted on the base.

[0006] The fixing mechanism includes a support block, a clamping screw, and a cylindrical pin, which are used to fix the rotating oil suction mechanism to be tested.

[0007] The positioning mechanism includes a slider, washer, nut, positioning pin, clamping screw, cylindrical pin and surface positioning block, which are used to limit the initial release angle of the rotary oil suction mechanism.

[0008] The base is a cuboid structure used to support the fixing mechanism and the positioning mechanism.

[0009] The fixing mechanism is installed on the base, and the top of the support block on it is provided with a structure for accommodating and fixing the rotating oil suction mechanism.

[0010] The slider of the positioning mechanism is movably mounted on the base. The slider has two surface positioning blocks, and the included angle between the two surface positioning blocks matches the release angle to be detected for the rotary oil suction mechanism. By moving the slider, the rotating component of the rotary oil suction mechanism, which is fixed by the fixing mechanism, can be positioned between the two surface positioning blocks, and its maximum unfolding angle is limited by the surface positioning blocks. When the slider is moved in the opposite direction, causing the surface positioning blocks to disengage from the rotating component, the rotary oil suction mechanism is released and can swing freely under gravity.

[0011] Furthermore, the bottom end of the slider of the positioning mechanism is provided with a rectangular groove, the two ends of the groove are semi-circular grooves that are smoothly joined together, and the slider is connected to the base with a gap fit through a positioning pin passing through the groove, so that the slider can move along the length direction of the groove.

[0012] Furthermore, the included angle between the opposing sides of the two surface positioning blocks is (90±5)°.

[0013] Furthermore, both the center of the support block of the fixing mechanism and the center of the slider of the positioning mechanism are provided with weight reduction holes.

[0014] Furthermore, the fixing mechanism includes a first support block and a second support block, wherein the top inner side of the first support block is provided with a groove for avoiding the oil suction pipe assembly of the rotating oil suction mechanism.

[0015] According to a second aspect of the present invention, a method of using the freely swinging inspection device for the rotating oil suction mechanism of an aircraft accessory as described above is provided, comprising the following steps: Step 1: Secure the rotary oil suction mechanism to the support block of the fixing mechanism using clamping screws; Step 2: Move the slider of the positioning mechanism so that the rotating component of the rotating oil suction mechanism enters the area between the two surface positioning blocks until the rotating component abuts against one of the surface positioning blocks. At this time, the rotating oil suction mechanism is pulled to the preset maximum angle. Step 3: Move the slider in the opposite direction to quickly disengage the two face positioning blocks from the rotating component and release the rotating oil suction mechanism; Step 4: Visually inspect the number of swings of the rotating oil suction mechanism as it falls naturally under gravity.

[0016] Further, step two specifically involves: pushing the slider to position the rotating component of the rotary oil suction mechanism between the two surface positioning blocks, and continuing to push until the rotating component contacts one of the surface positioning blocks, thereby achieving precise positioning of the rotary oil suction mechanism.

[0017] Furthermore, step three specifically involves: pushing the slider in the opposite direction to cause the surface positioning block to quickly leave the rotating assembly, releasing the rotating oil suction mechanism, and causing it to begin to swing under the action of gravity.

[0018] The present invention has the following beneficial effects: This invention, by setting a movable positioning mechanism, has two surface positioning blocks forming a precise (90±5)° limiting angle, which ensures that the rotating oil suction mechanism is pulled to and released at the precise angle required by the standard during each inspection, eliminating errors caused by human operation and ensuring the accuracy and consistency of the test results.

[0019] The rotating oil suction mechanism is limited and released by moving the slider, which is simple and fast to operate and improves detection efficiency.

[0020] This device has a simple structure, low manufacturing and maintenance costs, and can effectively identify unqualified rotary oil suction mechanisms, preventing lubrication failure due to slow oil pressure build-up after installation, thus ensuring the operational reliability and safety of the aero-engine accessory transmission system and even the entire aircraft. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0023] Figure 2 for Figure 1 AA cross-section view.

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the central base.

[0025] Explanation of reference numerals in the attached figures: 1—Base; 2—Support block 1 (first support block); 3—Support block 2 (second support block); 4—Slider; 5—Clamping screw; 6—Cylindrical pin; 7—Eye bolt; 8—Washer; 9—Nut; 10—Positioning pin; 11—Clamping screw; 12—Cylindrical pin; 13—Face positioning block 1 (first face positioning block); 14—Face positioning block 2 (second face positioning block). Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0028] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0030] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0032] like Figures 1-3 As shown in the figure, this embodiment of an aviation accessory rotating oil suction mechanism free swing inspection device mainly includes a base 1, lifting eye screws 7, a fixing mechanism, and a positioning mechanism. The base 1 serves as the mounting foundation for the entire device, on which the fixing mechanism and the positioning mechanism are mounted. The lifting eye screws 7 are installed at the four corners of the base 1 to facilitate the lifting and transfer of the device.

[0033] The fixing mechanism is used to securely position the rotating oil suction mechanism (not shown in the figure) to be tested on the device. In this embodiment, the fixing mechanism includes a first support block 2 (support block 1), a second support block 3 (support block 2), a clamping screw 5, and a cylindrical pin 6. Both the first support block 2 and the second support block 3 are long T-shaped blocks with a weight-reducing hole in the center to reduce weight and facilitate operation. The first support block 2 and the second support block 3 are precisely positioned by engaging the cylindrical pin 6 at the bottom with the corresponding pin hole on the base 1. Then, the clamping screw 5 passes through the through hole at the bottom of the support block and screws into the threaded hole on the base 1, thereby fixing the two support blocks to the base 1. In particular, a groove is provided on the inner side of the top of the first support block 2. This groove is used to accommodate and avoid the oil suction pipe assembly of the rotating oil suction mechanism to ensure correct installation. The top of both the first support block 2 and the second support block 3 are provided with internal threaded holes for clamping and fixing the main body of the rotating oil suction mechanism to the support block by clamping screws (not shown in the figure) and washers.

[0034] The positioning mechanism is used to define the initial release angle of the rotary oil suction mechanism before detection. The positioning mechanism includes a slider 4, a washer 8, a nut 9, a positioning pin 10, a clamping screw 11, a cylindrical pin 12, a first-side positioning block 13, and a second-side positioning block 14. A weight-reducing hole is also provided in the center of the slider 4. Two elongated grooves are provided at the bottom of the slider 4. These grooves are rectangular with semi-circular ends that are smoothly connected, forming an elongated hole. The positioning pin 10 passes through this groove and connects to the base 1, and is locked by the washer 8 and the nut 9, thereby mounting the slider 4 on the base 1 with a clearance fit. This structure allows the slider 4 to move back and forth on the base 1 along the length of the groove. The first-side positioning block 13 and the second-side positioning block 14 are precisely positioned to the top of the slider 4 by the cylindrical pin 12 and fixed by the clamping screw 11. The first-side positioning block 13 and the second-side positioning block 14 are arranged opposite each other, and the included angle α between their opposite sides is precisely machined to (90±5)°, for example... Figure 1The 92° (0°, -1°) shown, meaning an upper deviation of 0° and a lower deviation of -1°, ensures the accuracy of the angle range. This angle is the release angle to be detected by the rotary oil suction mechanism.

[0035] The method of using this device is as follows: First, install the rotary oil suction mechanism. Rotate the clamping screw 11 counterclockwise to make the slider 4 movable and push it to the edge of the base 1 for easy mounting of the test piece. Place the rotary oil suction mechanism on the first support block 2 and the second support block 3, ensuring that its oil suction tube assembly is aligned with the groove of the first support block 2. Then, use the clamping screw to press and fix the main body of the rotary oil suction mechanism through the threaded holes on the first support block 2 and the second support block 3.

[0036] Next, the initial release angle is set. The operator pushes slider 4, moving it towards the rotary oil suction mechanism. As slider 4 moves, the first face positioning block 13 and the second face positioning block 14 fixed thereon gradually approach the rotating component of the rotary oil suction mechanism. Slider 4 is continued to be pushed, causing the rotating component to enter the area between the two face positioning blocks, until one side of the rotating component is in complete contact with the side of one of the face positioning blocks (e.g., the first face positioning block 13). At this point, since the included angle between the two face positioning blocks has been precisely set, the rotary oil suction mechanism is precisely pulled to and maintained at its maximum extended position of (90±5)°.

[0037] Finally, the test is performed. The operator quickly pushes the slider 4 in the opposite direction, causing the first positioning block 13 and the second positioning block 14 to quickly disengage from the rotating assembly. The rotating oil suction mechanism is released instantly and begins to fall freely and swing back and forth under the influence of gravity. The operator visually observes and records the number of swings to determine whether it meets the technical requirement of no less than 6 swings.

[0038] Through the above structure and method, the present invention achieves precise limiting and reliable release of the oscillation detection of the rotary oil suction mechanism, with accurate detection results, convenient operation, and effective guarantee of product quality.

[0039] The above detailed embodiments are a description of the present invention. It should not be considered that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the protection scope of the present invention.

Claims

1. A free-swinging inspection device for an aircraft accessory rotary oil suction mechanism, characterized in that: Includes a base (1), and a fixing mechanism and a positioning mechanism mounted on the base (1); The fixing mechanism is used to fix the rotating oil suction mechanism to be tested; The positioning mechanism includes a slider (4) movably mounted on the base (1). The slider (4) is provided with a first positioning block (13) and a second positioning block (14). A preset angle is formed between the first positioning block (13) and the second positioning block (14) to limit the rotation component of the rotating oil suction mechanism fixed on the fixed mechanism so that it reaches a predetermined release angle. By moving the slider (4), the first surface positioning block (13) and the second surface positioning block (14) can be brought into contact with the rotating assembly to achieve a limit, or the contact can be broken to release the rotating oil suction mechanism.

2. The free-swinging inspection device for a rotating oil suction mechanism of aircraft accessories according to claim 1, characterized in that: The included angle between the opposite sides of the first positioning block (13) and the second positioning block (14) is (90±5)°.

3. The free-swinging inspection device for a rotating oil suction mechanism of aviation accessories according to claim 1, characterized in that: The bottom end of the slider (4) is provided with a long groove. The slider (4) is connected to the base (1) through a positioning pin (10) passing through the groove, so that the slider (4) can move relative to the base (1) along the length direction of the groove.

4. The free-swinging inspection device for a rotating oil suction mechanism of aircraft accessories according to claim 3, characterized in that: The groove is rectangular, with semicircular ends that smoothly connect to the rectangular portion.

5. The free-swinging inspection device for a rotating oil suction mechanism of aviation accessories according to claim 1, characterized in that: The fixing mechanism includes a first support block (2) and a second support block (3). The first support block (2) and the second support block (3) are fixedly installed on the base (1), and a connecting structure for fixing the rotating oil suction mechanism is provided on it.

6. The free-swinging inspection device for a rotating oil suction mechanism of aviation accessories according to claim 5, characterized in that: The top inner side of the first support block (2) is provided with a groove for avoiding the oil suction pipe assembly of the rotating oil suction mechanism.

7. The free-swinging inspection device for a rotating oil suction mechanism of aircraft accessories according to claim 1, characterized in that: The support block of the fixing mechanism and / or the slider (4) of the positioning mechanism are provided with weight reduction holes.

8. The free-swinging inspection device for a rotating oil suction mechanism of aircraft accessories according to claim 1, characterized in that: The base (1) is fitted with eye bolts (7) at its corners.

9. A method for inspecting the free swing of an aircraft accessory rotary oil suction mechanism, comprising the free swing inspection device for an aircraft accessory rotary oil suction mechanism as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Securely install the rotary oil suction mechanism onto the fixed mechanism; Step 2: Move the slider (4) toward the direction of the rotating oil suction mechanism so that the rotating component of the rotating oil suction mechanism enters between the first surface positioning block (13) and the second surface positioning block (14) and contacts it, thereby limiting the rotating oil suction mechanism to a preset release angle. Step 3: Move the slider (4) away from the rotating oil suction mechanism so that the first surface positioning block (13) and the second surface positioning block (14) are out of contact with the rotating component, and release the rotating oil suction mechanism; Step 4: Observe and record the number of times the rotating oil suction mechanism swings freely under the action of gravity.

10. A method for inspecting the free swing of an aircraft accessory rotary oil suction mechanism according to claim 9, characterized in that: In step two, the preset release angle is (90±5)°, which is defined by the included angle between the first surface positioning block (13) and the second surface positioning block (14).

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