Cleaning device and method for inner cavity of flow divider assembly

Abstract

The invention discloses a cleaning device and method for an inner cavity of a flow divider assembly, and belongs to the technical field of aero-engine part machining. The cleaning device comprises a bottom plate and an arc-shaped pipe erected above the bottom plate through a supporting column. The arc-shaped pipe is provided with a plurality of nozzles, blanking caps at the two ends, a filler neck in the middle and a plurality of clamp assemblies. The nozzles are used for stretching into the inner cavity of the flow divider assembly from the notches for flushing. The hoop assembly is used for fastening the flow divider assembly to the arc-shaped pipe. The cleaning method comprises the steps of part clamping, fastening, pipeline connecting, multi-point synchronous flushing and the like. By means of the arc-shaped pipe structure integrating the multiple nozzles, one-time clamping, multi-point synchronous, uniform and efficient flushing of the flow divider assembly is achieved, the problems that a traditional single-pipe point-by-point cleaning mode is low in efficiency and has dead corners are thoroughly solved, and the efficiency and quality of cleaning operation are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of aero-engine component processing, and in particular to a cleaning device and method for the inner cavity of a splitter assembly. Background Technology

[0002] Combination Figure 1 The diagram shows the structure of the splitter assembly. The splitter assembly is a large-diameter annular component, formed by argon arc welding of the splitter housing 101 and the mounting edge 102. The splitter assembly has a hollow cavity inside, and multiple notches 101a are provided on the splitter housing 101, communicating with the inner cavity of the splitter assembly. In use, the splitter assembly is welded to ten support plates of the engine casing. The splitter assembly is not only an important mounting point for other engine accessories but also provides stable support and fixation for other components. Furthermore, the splitter assembly also functions to split and mix air and aviation kerosene, ensuring thorough mixing and stable, continuous combustion. This helps convert more chemical energy into thermal energy, giving the combustion gas greater kinetic energy and generating greater thrust. Therefore, the cleanliness of the splitter's inner cavity is of extremely high importance.

[0003] Before CNC machining the distributor assembly, to prevent iron filings from entering the inner cavity of the distributor assembly, the measure taken is to fill the inner cavity of the distributor assembly with wax. After the parts are machined, the wax is removed and cleaned. The distributor assembly has only a few notches 101a that are connected to the inner cavity, which is a semi-open structure and cannot be thoroughly cleaned.

[0004] The current cleaning method involves dewaxing followed by rinsing with lubricating oil and then with water. This is achieved by inserting a nozzle into the inner cavity of the distributor assembly through one of the notches 101a, and then introducing high-pressure lubricating oil and water for cleaning. This cleaning method has the following problems: it requires repeatedly inserting the nozzle into different notches 101a for cleaning, resulting in low cleaning efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a cleaning device and method for the inner cavity of a distributor assembly. This device aims to achieve simultaneous cleaning of multiple notches on the distributor assembly by setting an arc-shaped tube with multiple nozzles, thereby significantly improving cleaning efficiency, ensuring the uniformity and thoroughness of inner cavity cleaning, and simplifying the operation process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a cleaning device for the inner cavity of a diverter assembly. The diverter assembly is welded together from a diverter housing and an mounting edge. The diverter assembly has a hollow cavity inside. Multiple notches are provided on the diverter housing, and the notches communicate with the inner cavity of the diverter assembly. The cleaning device includes an arc-shaped tube and multiple nozzles disposed on the arc-shaped tube. The nozzles are used to extend into the inner cavity of the diverter assembly through the notches. The shape of the arc-shaped tube is adapted to the annular contour of the diverter assembly. End caps are provided at both ends of the arc-shaped tube to seal the ends of the arc-shaped tube. A connecting nozzle is provided in the middle of the arc-shaped tube, and a pipe connector is provided on the connecting nozzle for connecting to an external cleaning medium supply pipeline. Multiple clamping assemblies are provided on the arc-shaped tube for clamping the diverter assembly onto the arc-shaped tube.

[0007] Preferably, the clamp assembly includes a U-shaped clamp, a horizontal plate, and a nut; the horizontal plate is welded to the arc-shaped tube; the two ends of the U-shaped clamp pass through the horizontal plate and are screwed with the nut. By tightening the nut, the U-shaped clamp can grip the diverter assembly.

[0008] Preferably, the cleaning device further includes a base plate, which is spaced below the arc-shaped tube and connected to the horizontal plate by support columns. The base plate provides stable foundation support for the entire device.

[0009] Preferably, each horizontal plate is provided with at least two support columns, and the upper end of the support column is welded to the horizontal plate and the lower end is welded to the bottom plate to form a stable support structure.

[0010] Preferably, the number of nozzles is M, and the number of notches on the diverter assembly is N, satisfying: 0.5N≤M≤0.7N, where M and N are both positive integers, and N≥10. This quantitative relationship ensures that some notches are in an unused state, i.e., when no nozzle is inserted during cleaning, so that the cleaning medium can be discharged from the unused notches.

[0011] In one specific embodiment, the number of notches on the diverter assembly is 10, and the number of nozzles is 7.

[0012] Preferably, the nozzle is fixed to the arc-shaped tube by means of threaded connection, interference fit or welding.

[0013] Secondly, the present invention provides a method for cleaning the inner cavity of a splitter assembly, using the above-mentioned cleaning device, comprising the following steps: S1. Place the cleaning device on the workbench; S2. Place the distributor assembly to be cleaned on the cleaning device, and make the nozzle extend into the inner cavity of the distributor assembly from the notch. S3. Use the clamp assembly to clamp the distributor assembly onto the arc-shaped pipe; S4. Connect the nozzle to the cleaning medium supply pipeline through the pipe fitting; S5. The cleaning medium is introduced into the arc-shaped tube, and the cleaning medium is sprayed into the inner cavity of the distributor assembly through multiple nozzles for rinsing.

[0014] Preferably, the cleaning medium is lubricating oil or clean water, which can be selected according to the cleaning process requirements.

[0015] Preferably, the rinsing lasts for 5 minutes, which is sufficient to effectively remove residual wax and impurities from the cavity.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: (1) High cleaning efficiency: Multiple nozzles are integrated through the arc tube, which can cover multiple gaps at one time and realize multi-point synchronous rinsing. This eliminates the tedious steps of repeatedly inserting and removing and changing the position of the nozzle, and greatly shortens the cleaning operation time.

[0017] (2) Uniform and thorough cleaning effect: Multiple nozzles spray cleaning medium into the inner cavity from different positions, which can form a cross-covering flushing flow field, effectively reducing cleaning dead angles and improving the uniformity and thoroughness of cleaning the inner cavity.

[0018] (3) Easy to operate and stable clamping: The clamping is fixed by clamp assembly, which is simple and quick to operate and the fixation is reliable, ensuring the stability of the relative position of the parts and the device during the rinsing process and ensuring the consistency of the cleaning effect.

[0019] (4) Simple structure and strong practicality: The device has a simple structural design and is mainly composed of components such as arc tube, base plate, support column and clamp assembly. It has low manufacturing and maintenance costs and is easy to promote and use on existing production lines. Attached Figure Description

[0020] 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. Obviously, 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 the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the splitter assembly. Figure 2 This is a perspective structural diagram of the cleaning device provided by the present invention; Figure 3 This is a front view of the cleaning apparatus provided by the present invention; Figure 4 This is a top view of the cleaning apparatus provided by the present invention.

[0022] The following are the reference numerals: 1. Base plate; 2. Arc-shaped pipe; 3. Plug; 4. Nozzle; 5. Pipe fitting; 6. Clamp assembly; 6a. U-shaped clamp; 6b. Horizontal plate; 6c. Nut; 7. Connecting nozzle; 8. Support column; 101. Diverter housing; 101a. Notch; 102. Mounting edge. Detailed Implementation

[0023] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] like Figures 1 to 4 As shown, this embodiment provides a specific implementation of a cleaning device and method for the inner cavity of a distributor assembly.

[0026] like Figure 1 As shown, the object to be cleaned is a diffuser assembly for an aircraft engine. It is a large-diameter annular welded structure with a diameter of φ600mm, welded together from a diffuser housing 101 and a mounting edge 102, forming an internal hollow cavity. N notches 101a are formed circumferentially on the diffuser housing 101; specifically, there are 10 notches 101a. These notches 101a are the only channels connecting the inner cavity to the outside and are also the inlets for the cleaning medium to enter the inner cavity.

[0027] like Figures 2 to 4 As shown, the cleaning device in this embodiment mainly includes a base plate 1, an arc-shaped pipe 2, a plug 3, a nozzle 4, a pipe joint 5, a clamp assembly 6, a pipe nozzle 7, and a support column 8.

[0028] The base plate 1 is an arc-shaped steel plate, providing a stable foundation support for the entire cleaning device. The arc-shaped tube 2 is made by bending a section of stainless steel pipe, and its curvature is designed to approximately match the annular contour of the inner cavity of the diverter assembly. The arc-shaped tube 2 is supported above the base plate 1 by multiple sets of support structures. Specifically, multiple horizontal plates 6b are welded onto the arc-shaped tube 2. Two vertical support columns 8 are welded below each horizontal plate 6b, and the lower ends of the support columns 8 are firmly welded to the base plate 1. This multi-point support structure ensures the stability of the arc-shaped tube 2 when bearing the weight of the parts and the reaction force of the rinsing.

[0029] At both ends of the arc-shaped pipe 2, plugs 3 are installed by threaded connection or welding to seal the pipe ends and prevent leakage of cleaning medium. A connecting nozzle 7 is welded to the center of the top of the arc-shaped pipe 2. A standard pipe fitting 5, such as a quick coupling or threaded coupling, is installed on the connecting nozzle 7 for easy connection to an external lubricating oil pump or cleaning fluid supply line.

[0030] Along the arc length of the arc-shaped tube 2, multiple mounting holes are formed according to the distribution positions of the notches 101a in the diverter assembly. In this embodiment, the diverter assembly has 10 notches 101a, and the cleaning device is equipped with 7 nozzles 4 accordingly. The nozzles 4 are fixed by being screwed into the mounting holes, and the interface can be sealed by sealant or gaskets. The mounting angle of each nozzle 4 is adjusted to ensure that it can accurately extend into the inner cavity of the diverter assembly from the notch 101a, and that the liquid flow it sprays can effectively cover the inner cavity wall.

[0031] The clamp assembly 6 is a key component for securing the distributor assembly. Each clamp assembly 6 includes a U-shaped clamp 6a, a horizontal plate 6b, and two nuts 6c. The horizontal plate 6b is pre-welded to a specific location on the arc-shaped tube 2. During installation, the U-shaped clamp 6a is passed across the annular outer wall of the distributor assembly, with its two threaded ends pointing downwards through the two through holes on the horizontal plate 6b. Then, the nuts 6c are screwed onto the ends and tightened. By symmetrically tightening the nuts on both sides, the U-shaped clamp 6a securely clamps the distributor assembly to the arc-shaped tube 2, preventing parts from moving or falling off during cleaning. This embodiment uses two sets of clamp assemblies 6.

[0032] In this embodiment, the base plate 1, support column 8, horizontal plate 6b and arc tube 2 are made of stainless steel to ensure sufficient corrosion resistance and structural strength in the cleaning medium environment.

[0033] The method for cleaning the inner cavity of the distributor assembly using the above-mentioned cleaning device includes the following steps: S1. Preparation: Place the cleaning device stably on the workbench. Check that all nozzles 4 are unobstructed and that the pipe joints 5 are intact. Prepare the outlet end of the external cleaning medium supply pipeline.

[0034] S2. Parts clamping: Use hoisting equipment to lift the distributor assembly directly above the cleaning device, then slowly lower the distributor assembly while visually adjusting its circumferential position so that the 7 nozzles 4 on the arc tube 2 are aligned with and inserted into the corresponding 7 notches 101a on the distributor housing 101. The remaining 3 notches 101a are left empty, that is, the nozzles 4 are not inserted during cleaning, so that the cleaning medium can be discharged from the empty notches 101a.

[0035] S3. Fastening parts: Install two sets of clamp assemblies 6 in sequence. Attach the U-shaped clamp 6a to the splitter assembly, with the end of the U-shaped clamp 6a passing through the horizontal plate 6b. Initially tighten the nut 6c by hand, then use a wrench to tighten the nut 6c symmetrically and alternately to ensure that the splitter assembly is securely clamped to the arc-shaped pipe 2 without any shaking.

[0036] S4. Connecting the pipeline: Connect the connector of the external cleaning medium supply pipeline to the pipe connector 5 on the cleaning device and tighten it.

[0037] S5. Perform cleaning: The cleaning medium is pumped into the cleaning device through the pump body. The high-pressure cleaning medium enters the arc-shaped pipe 2 through the pipe joint 5 and the connecting nozzle 7, and is evenly distributed to the 7 nozzles 4. The cleaning medium is simultaneously sprayed into the inner cavity of the distributor from the 7 positions, and the rinsing continues for about 5 minutes. The waste liquid generated during rinsing flows out from the empty opening 101a.

[0038] S6. Post-processing: After cleaning, shut off the cleaning medium supply. Loosen and remove the nuts 6c and U-shaped clamps 6a of each clamp assembly 6 in sequence. Lift or remove the cleaned distributor assembly. If necessary, use low-pressure air to blow through the pipe joint 5 to clean the arc-shaped pipe 2 and nozzle 4 for simple self-cleaning of the device in preparation for the next use.

[0039] In addition, after step S5, the clamp assembly 6 can be loosened, and the distributor assembly can be rotated at a certain angle so that the nozzle 4 is inserted into the inner cavity of the distributor assembly from the previously empty notch 101a, and then steps S1 to S5 can be repeated.

[0040] In this embodiment, the cleaning medium is lubricating oil or water, which can be selected according to the cleaning process requirements, and will not be elaborated further here.

[0041] This invention revolutionizes traditional inefficient single-point cleaning into highly efficient multi-point parallel cleaning through a cleverly designed multi-nozzle cleaning device. A single clamping operation can complete the rinsing of most of the inner cavity surfaces, significantly improving work efficiency and reducing the labor intensity of operators while ensuring or even improving cleaning quality. It has significant practical and economic value.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A cleaning device for the inner cavity of a distributor assembly, the distributor assembly being welded together from a distributor housing (101) and a mounting edge (102), the distributor assembly having a hollow cavity inside, and having a plurality of notches (101a) provided on the distributor housing (101), the notches (101a) communicating with the inner cavity of the distributor assembly, characterized in that: The cleaning device includes an arc-shaped tube (2) and a plurality of nozzles (4) disposed on the arc-shaped tube (2); the nozzles (4) are for extending from the notch (101a) into the inner cavity of the distributor assembly; A plug (3) is provided at both ends of the arc-shaped pipe (2); a pipe nozzle (7) is provided in the middle of the arc-shaped pipe (2), and a pipe connector (5) is provided on the pipe nozzle (7) for connecting to the external cleaning medium supply pipeline; Multiple clamp assemblies (6) are provided on the arc-shaped tube (2) for clamping the splitter assembly onto the arc-shaped tube (2).

2. The cleaning device according to claim 1, characterized in that, The clamp assembly (6) includes a U-shaped clamp (6a), a horizontal plate (6b), and a nut (6c); the horizontal plate (6b) is welded to the arc-shaped tube (2); the two ends of the U-shaped clamp (6a) pass through the horizontal plate (6b) and are screwed with the nut (6c).

3. The cleaning device according to claim 2, characterized in that, It also includes a base plate (1), which is spaced below the arc-shaped tube (2), and the base plate (1) and the horizontal plate (6b) are connected by a support column (8).

4. The cleaning device according to claim 3, characterized in that, Each horizontal plate (6b) is provided with at least two support columns (8), and the upper end of the support column (8) is welded to the horizontal plate (6b) and the lower end is welded to the base plate (1).

5. The cleaning device according to claim 1, characterized in that, The number of nozzles (4) is M, and the number of notches (101a) on the diverter assembly is N, satisfying: 0.5N≤M≤0.7N, and M and N are both positive integers, N≥10.

6. The cleaning apparatus according to claim 5, characterized in that, The number of notches (101a) on the splitter assembly is 10, and the number of nozzles (4) is 7.

7. The cleaning device according to claim 1, characterized in that, The nozzle (4) is fixed to the arc-shaped tube (2) by means of threaded connection, interference fit or welding.

8. A method for cleaning the inner cavity of a distributor assembly, characterized in that, The cleaning apparatus according to any one of claims 1 to 7 comprises the following steps: S1. Place the cleaning device on the workbench; S2. Place the distributor assembly to be cleaned on the cleaning device and make the nozzle (4) extend into the cavity of the distributor assembly from the notch (101a); S3. Use the clamp assembly (6) to clamp the distributor assembly onto the arc-shaped pipe (2); S4. Connect the nozzle (7) to the cleaning medium supply pipeline through the pipe fitting (5); S5. The cleaning medium is introduced into the arc-shaped tube (2), and the cleaning medium is sprayed into the inner cavity of the distributor assembly through multiple nozzles (4) for rinsing.

9. The cleaning method according to claim 8, characterized in that, The cleaning medium is lubricating oil or water.

10. The cleaning method according to claim 8, characterized in that, The rinsing process lasts for 5 minutes.

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