A fuel nozzle flow direction checking device

Abstract

The utility model belongs to tooling parts technical field, concretely relates to a fuel nozzle flow direction inspection device, including the bottom plate, the bottom plate places on the fixed workbench surface, the bottom plate is welded the base, install the oil inlet nozzle and middle machine case oil injection nozzle on the base, and the nozzle for inspection is installed on the middle machine case oil injection nozzle, still install A target, AB target and B target on the base, respectively weld copper pipe on A target, AB target and B target, the welding position and direction of copper pipe correspond with three spouts on the nozzle, are used for receiving the fuel that middle machine case oil injection nozzle sprays to determine whether the nozzle flow direction is correct. The utility model can check whether the nozzle flow direction is correct falls into the coordinate target, avoids damaging the nozzle simultaneously, improves the working quality and efficiency of nozzle flow direction inspection.

Description

Technical Field

[0001] This utility model belongs to the field of tooling components technology, specifically relating to a fuel nozzle flow direction inspection device. Background Technology

[0002] During maintenance, the fuel nozzles in the combustion chamber of an aircraft auxiliary power unit require flow direction checks to ensure that fuel is correctly injected into the required location. Incorrect flow direction checks may prevent the nozzles from delivering fuel to the correct position, leading to nozzle malfunction and ultimately starter motor failure. Since the nozzles have three orifices with different directions and angles, three different targets are needed for flow direction checks. Existing nozzle inspection equipment cannot precisely control whether the injected fuel reaches the designated location. To improve the accuracy of nozzle flow direction checks, avoid nozzle damage, and increase inspection efficiency, a specialized nozzle flow direction inspection device needs to be designed. Utility Model Content

[0003] The purpose of this invention is to provide a fuel nozzle flow direction inspection device, while avoiding damage to the nozzle by tooling during disassembly, thereby improving disassembly quality and work efficiency.

[0004] This utility model provides a fuel nozzle flow direction inspection device, comprising a base plate placed on a fixed workbench. A base is welded to the base plate, and an inlet nozzle and a middle casing nozzle are mounted on the base. The nozzle to be inspected is mounted on the middle casing nozzle. The base also has an A target, an AB target, and a B target. The A target is located to the right of the middle casing nozzle; the B target is located to the left of the middle casing nozzle; and the AB targets are located directly in front of the middle casing nozzle. Copper tubes are welded to the A target, the AB target, and the B target respectively, one on the A target, two on the AB target, and one on the B target. The welding position and direction of the copper tubes correspond to the three nozzle openings on the nozzle.

[0005] The base plate is a solid structure, integrally welded, and the base is welded to the base plate. The copper tubes are welded to targets A, B, and AB at specific positions and in specific directions, and are fixed to the base plate using solder. The direction of the copper tubes is the extension line of the nozzle. The fuel injector in the middle casing injects fuel into the copper tubes in targets A, B, and AB.

[0006] Furthermore, the A target, B target, and AB target are fixed to the base plate by screws and locating pins.

[0007] Furthermore, the inside of the oil inlet is sealed with a sealing ring, and the oil passage is connected using a rubber hose, allowing for safe and convenient disassembly. The oil inlet is connected to the oil inlet device.

[0008] Furthermore, the fuel injector in the middle casing is installed onto the base via its own threads.

[0009] The beneficial effects of this invention are as follows: It optimizes the fuel nozzle flow direction inspection method by employing a target seat design that matches the surface shape of the fuel nozzle orifice, enabling better reception of the fuel injected from the nozzle. The fuel injector uses a copper structure. Since copper is softer than the steel used in other nozzles, the deformation generated during connection and tightening is absorbed by the fuel injector, allowing for safe and convenient disassembly and significantly reducing the risk of nozzle damage during disassembly. Therefore, this invention improves the accuracy of nozzle flow direction inspection, avoids nozzle damage, saves costs, and enhances the quality and efficiency of nozzle flow direction inspection. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the fuel nozzle flow direction inspection device of this utility model; Figure 2 This is a cross-sectional view of the oil inlet nozzle and the middle casing oil injector. Figure 3 and Figure 4 These are schematic diagrams of the fuel nozzle process inspection device of this utility model from different angles.

[0011] The labels in the attached diagram are as follows: 1-oil inlet, 2-middle casing oil injector, 3-base, 4-A target, 5-copper pipe, 6-base plate, 7-locating pin, 8-screw, 9-AB target, 10-B target, 11-O-ring. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0013] This utility model relates to a fuel nozzle flow direction inspection device, such as... Figure 1 As shown, the system includes a base plate 6, which is placed on a fixed workbench. A base 3 is welded to the base plate, and an oil inlet nozzle 1 and a middle casing oil nozzle 2 are installed on the base. The nozzle to be inspected is installed on the middle casing oil nozzle 2. A target 4, AB target 9, and B target 10 are also installed on the base 3. Target A is located to the right of the middle casing oil nozzle; target B is located to the left of the middle casing oil nozzle; and targets AB are located directly in front of the middle casing oil nozzle. Copper tubes are welded to targets A, AB, and B respectively, one on target A, two on target AB, and one on target B. The welding position and direction of the copper tubes correspond to the three nozzles on the nozzle.

[0014] Inspection process: Connect the fuel inlet nozzle 1 to the fuel inlet device. Install the nozzle to be inspected on the fuel injector 2 in the middle casing. Turn on the fuel inlet device switch. The fuel injector 2 in the middle casing sprays fuel. The fuel injector has three nozzles with different directions and angles. The sprayed fuel enters the copper tubes in target A, target B, and target AB respectively. Use containers to collect the sprayed fuel. If the fuel nozzle flow direction test is qualified, the test is passed.

Claims

1. A fuel nozzle flow direction inspection device, characterized in that: Includes a base plate (6), which is placed on a fixed workbench. A base (3) is welded on the base plate. An oil inlet (1) and a middle casing oil nozzle (2) are installed on the base. The nozzle to be inspected is installed on the middle casing oil nozzle (2). An A target (4), an AB target (9), and a B target (10) are also installed on the base (3). The A target is located to the right of the middle casing oil nozzle. The B target is located to the left of the middle casing oil nozzle. The AB target is located directly in front of the middle casing oil nozzle. Copper pipes are welded to the A target, the AB target, and the B target respectively. There is one copper pipe on the A target, two copper pipes on the AB target, and one copper pipe on the B target. The welding position and direction of the copper pipes correspond to the three nozzles on the nozzle.

2. The fuel nozzle flow direction inspection device according to claim 1, characterized in that: The inside of the oil inlet is sealed with a sealing ring, and the oil passage is connected using a rubber hose.

3. The fuel nozzle flow direction inspection device according to claim 1, characterized in that: Use solder to fix the copper tube to the base plate, with the copper tube fixed in the direction of the nozzle extension line.

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