A self-adapting fuel flow adjusting device for a porous self-excited sweeping fuel injection rod

Abstract

The present application belongs to the technical field of afterburner fuel flow regulation, and relates to a self-adaptive fuel flow regulation device for a multi-hole self-excited sweeping fuel injection rod, comprising a nozzle connecting part and a flow sensing and regulating part. The nozzle connecting part comprises a fixed fuel baffle, a top connecting strip, a bottom connecting strip and a side connecting strip. The fixed fuel baffle is an arc-shaped long strip plate body, and a concave elastic groove is arranged on one side of the long strip plate body. The flow sensing and regulating part is rotatably installed in the concave elastic groove. The flow sensing and regulating part comprises a long strip-shaped movable fuel baffle, and an inside flow sensing tab and an outside flow sensing tab are welded on the inside and outside of the movable fuel baffle. When fuel flows through the self-adaptive fuel flow regulation device, a pressure difference is generated on both sides, which drives the movable fuel baffle to move inward, and the fuel flow size of the corresponding fuel injection hole is self-adaptively regulated, so that the fuel flow uniformity of each fuel injection hole is ensured, the fuel atomization degree is ensured, and the combustion efficiency of the afterburner is finally improved.

Description

Technical Field

[0001] This invention belongs to the field of fuel flow regulation technology in afterburners, and specifically to an adaptive fuel flow regulation device for a multi-hole self-excited sweeping fuel injector. Background Technology

[0002] Currently, in combustion chamber fuel flow tests, especially in afterburner fuel flow tests, the uniformity of fuel flow is particularly important because it largely determines the quality of fuel atomization. When the fuel injected by the fuel injector is evenly distributed in space, the fuel atomization effect will be greatly improved, and the combustion efficiency of the afterburner will also be improved.

[0003] Existing methods include experiments to analyze fuel flow uniformity and devices to improve it. The fuel manifold flow non-uniformity testing device invented by Xiao Hai and Li Wengao aims to collect fuel quantity data from each fuel nozzle to analyze the non-uniformity of the fuel manifold flow distribution. The adaptive low-pressure fuel distributor for multi-tube pulse detonation combustion chambers invented by Zheng Longxi and Tan Wenhao et al. aims to solve the problem of uneven fuel distribution in the adaptive fuel supply distributor of multi-tube pulse detonation combustion chambers. The secondary distribution fuel supply structure invented by Tang Xingyan and Zhou Yuzhen et al. aims to solve the problem that the fuel flow uniformity of each injection hole is significantly affected by the distance between the internal fuel flow channels and fuel supply lines.

[0004] In summary, fuel flow uniformity is a common problem that affects fuel atomization and combustion efficiency. In the case of multi-hole self-excited sweeping fuel injectors used in afterburners, uneven fuel flow occurs due to variations in fuel pressure at the injection holes. Because of the unique assembly method and narrow internal flow channels of the multi-hole self-excited sweeping fuel injector, the aforementioned types of devices are unusable. Therefore, there is an urgent need to design a fuel flow regulating device adapted to the multi-hole self-excited sweeping fuel injector. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-hole self-excited sweeping fuel injector adaptive fuel flow regulation device to solve the problem of poor fuel flow uniformity.

[0006] The technical problem solved by this invention is achieved through the following technical solution:

[0007] A multi-hole self-excited sweeping type fuel injector adaptive fuel flow regulating device is characterized in that it includes a nozzle connection part and a flow sensing regulating part. The nozzle connection part includes a fixed fuel baffle, a top connecting strip, a bottom connecting strip and a side connecting strip. The fixed fuel baffle is an arc-shaped elongated plate. Side connecting strips, top connecting strips and bottom connecting strips are respectively provided on one side and at the top and bottom ends of the elongated plate. A concave elastic groove is provided on the other side of the elongated plate. The flow sensing regulating part is rotatably installed in the concave elastic groove.

[0008] The flow-sensing adjustment unit includes a long strip-shaped movable fuel baffle, with an inner flow-sensing paddle and an outer flow-sensing paddle welded to the inner and outer sides of the movable fuel baffle.

[0009] Furthermore, the top connecting strip, bottom connecting strip, and side connecting strip are all ellipsoidal.

[0010] Moreover, both the inner and outer flow-sensing paddles are arc-shaped pieces, with the outer convexity of the inner flow-sensing paddle being greater than that of the outer flow-sensing paddle.

[0011] Furthermore, the flow-sensing adjustment unit also includes a limiting structure, which includes a limiting groove, a self-lubricating guide rail, a self-lubricating guide plate, and a self-lubricating guide block. A fan-shaped limiting groove is provided in the fuel chamber of the fuel injector, which is arranged downwards and opposite to each other. A self-lubricating guide rail is installed in the fan-shaped limiting groove. A self-lubricating guide plate is slidably installed on the self-lubricating guide rail. The self-lubricating guide plate is connected to the upper and lower end faces of the movable fuel baffle through the self-lubricating guide block. The curvature of the self-lubricating guide rail is consistent with the swing curvature of the movable fuel baffle.

[0012] Furthermore, two vertically continuous observation slits are provided along the length of the movable fuel baffle.

[0013] Furthermore, the nozzle connection is mounted on one side of the fuel nozzle inlet via a mounting structure, and the flow-sensing adjustment part is located in front of the fuel nozzle inlet.

[0014] The mounting structure includes a side mounting groove, a side wedge-shaped elastic groove, a bottom mounting groove, and a bottom wedge-shaped elastic groove. A vertical side mounting groove is provided on one side of the fuel nozzle inlet, and a bottom mounting groove is horizontally provided at both ends of the side mounting groove. The bottom mounting groove is provided on the fuel chamber wall of the fuel injection pipe. A side wedge-shaped elastic groove is embedded in the side mounting groove, and a bottom wedge-shaped elastic groove is embedded in the bottom mounting groove. The side connecting strip is snapped into the side wedge-shaped elastic groove, and the top connecting strip and the bottom connecting strip are respectively embedded in the vertically and vertically provided bottom wedge-shaped elastic grooves.

[0015] The advantages and beneficial effects of this invention are as follows:

[0016] This multi-hole self-excited sweeping fuel injector adaptive fuel flow regulation device features a double-convex wing structure formed by the flow sensing paddles on the flow sensing adjustment section. The inner flow sensing paddle has a greater outward convexity than the outer flow sensing paddle. When fuel flows through this adaptive fuel flow regulation device, a pressure difference is generated on both sides, causing the movable fuel baffle to retract inward. This adaptively adjusts the fuel flow rate of the corresponding injection hole, thereby ensuring the uniformity of fuel flow rate at each injection hole, thus ensuring the degree of fuel atomization and ultimately improving the combustion efficiency of the afterburner.

[0017] The fixed fuel baffle and the movable fuel baffle of the present invention are equipped with connecting strips that are interlocked with wedge-shaped elastic grooves. This detachable connection method facilitates the maintenance and replacement of the adaptive fuel flow regulating device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation structure of the present invention;

[0020] Figure 3 Figure 1 is a top view of the present invention assembled on the mounting structure (Figure a is a schematic diagram of the flow-sensing adjustment part located in the middle of the limiting groove, and Figure b is a structural schematic diagram of the flow-sensing adjustment part in the retracted state).

[0021] Figure 4 This is a schematic diagram of the structure assembled inside the porous self-excited sweeping fuel injector of the present invention.

[0022] Figure Labels

[0023] 1-Self-lubricating guide plate, 2-Outer flow sensing paddle, 3-Inner flow sensing paddle, 4-Movable fuel baffle, 5-Top connecting strip, 6-Side connecting strip, 7-Fixed fuel baffle, 8-Bottom connecting strip, 9-Concave elastic groove, 10-Side wedge-shaped elastic groove, 11-Bottom wedge-shaped elastic groove, 12-Self-lubricating guide rail, 13-Self-lubricating guide block, 14-Side mounting groove, 15-Bottom mounting groove, 16-Limiting groove, 17-Fuel flow regulating device, 18-Fuel nozzle, 19-Fuel injection rod. Detailed Implementation

[0024] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0025] like Figure 1 , Figure 3As shown, an adaptive fuel flow regulating device for a multi-hole self-excited sweeping fuel injector is innovative in that it includes a fixed nozzle connection part and a flow-sensing regulating part that is oscillating at the end of the nozzle connection part. The nozzle connection part is installed in the fuel chamber of the multi-hole self-excited sweeping fuel injector 19 and is located on the inlet side of the fuel nozzle 18.

[0026] like Figure 1-3 As shown, the nozzle connection includes a fixed fuel baffle 7, a top connecting strip 5, a bottom connecting strip 8, and a side connecting strip 6. The fixed fuel baffle is an arc-shaped elongated plate. Side connecting strips, top connecting strips, and bottom connecting strips are respectively provided on one side and at the top and bottom ends of the elongated plate. A concave elastic groove 9 is provided on the other side of the elongated plate, and a flow-sensing adjustment part is rotatably installed in the concave elastic groove. The top connecting strip, bottom connecting strip, and side connecting strip are all ellipsoidal.

[0027] The flow-sensing adjustment unit includes a long strip-shaped movable fuel baffle 4, with an inner flow-sensing paddle 3 and an outer flow-sensing paddle 2 welded to the inner and outer sides of the movable fuel baffle.

[0028] The flow-sensing adjustment unit also includes a limiting structure, which includes a limiting groove 16, a self-lubricating guide rail 12, a self-lubricating guide plate 1, and a self-lubricating guide block 13. A downwardly oriented fan-shaped limiting groove is provided in the fuel chamber of the fuel injector. A self-lubricating guide rail is installed in the fan-shaped limiting groove. A self-lubricating guide plate is slidably installed on the self-lubricating guide rail. The self-lubricating guide plate is connected to the upper and lower end faces of the movable fuel baffle through the self-lubricating guide block. The curvature of the self-lubricating guide rail is consistent with the swing curvature of the movable fuel baffle.

[0029] In use, first weld the self-lubricating guide rail to the inner wall of the limiting groove, then connect the self-lubricating guide block and the self-lubricating guide rail together, and finally snap the self-lubricating guide plate of the movable fuel baffle into the self-lubricating guide block, so that the flow-sensing paddle can drive the movable fuel baffle to move on the self-lubricating guide rail.

[0030] To facilitate the assembly of the flow-sensing adjustment unit and the limiting structure, two vertically continuous observation slits are provided along the length of the movable fuel baffle to determine the position of the flow-sensing adjustment unit on the limiting structure.

[0031] The nozzle connection part is installed on one side of the fuel nozzle inlet via a mounting structure, and the flow-sensing adjustment part is located in front of the fuel nozzle inlet;

[0032] The mounting structure includes a side mounting groove 14, a side wedge-shaped elastic groove 10, a bottom mounting groove 15, and a bottom wedge-shaped elastic groove 11. A vertical side mounting groove is provided on one side of the fuel nozzle inlet, and a bottom mounting groove is horizontally provided at both ends of the side mounting groove. The bottom mounting groove is provided on the fuel chamber wall of the fuel injection pipe. A side wedge-shaped elastic groove is embedded in the side mounting groove, and a bottom wedge-shaped elastic groove is embedded in the bottom mounting groove. The side connecting strip is snapped into the side wedge-shaped elastic groove, and the top connecting strip and the bottom connecting strip are respectively embedded in the upper and lower bottom wedge-shaped elastic grooves.

[0033] In use, firstly, the side wedge-shaped elastic groove and the bottom wedge-shaped elastic groove are welded into the side mounting groove and the bottom mounting groove, respectively. Then, the side connecting strip for fixing the fuel baffle is vertically inserted into the side mounting groove. Next, the top connecting strip and the bottom connecting strip are pressed into the bottom wedge-shaped elastic groove, so that the three sides of the fixed fuel baffle are fixedly interlocked. The concave elastic groove welded on the other side is interlocked with the spherical structure at the end of the movable fuel baffle on the flow regulating part.

[0034] The working principle of the multi-hole self-excited sweeping fuel injector adaptive fuel flow regulating device provided by the present invention is described below:

[0035] like Figure 3-4 As shown, the multi-hole self-excited sweeping fuel injector adaptive fuel flow regulating device 17, which includes a novel self-excited sweeping fuel nozzle at the very end of the multi-hole self-excited sweeping fuel injector, is as follows: Figure 3 (a) With the position fixed, when fuel flows into the multi-hole self-excited sweeping fuel injector through the multi-hole self-excited sweeping fuel injector adaptive fuel flow regulating device, the flow-sensing vanes of the device form a double-convex wing shape. The outer flow-sensing vane surface is relatively flat, resulting in a thicker flow tube, lower fuel flow velocity, and thus higher pressure. The inner flow-sensing vane surface is convex, resulting in a thinner flow tube, higher fuel flow velocity, and thus lower pressure. Under the action of the pressure difference ΔP, the movable fuel baffle retracts inward. A schematic diagram of this inward retraction is shown below. Figure 3 As shown in (b), the fuel is blocked when it flows through the device, and the flow rate Q decreases. Therefore, as it flows through each of the multi-hole self-excited sweeping fuel injector adaptive fuel flow regulating devices in sequence, the flow rate Q gradually decreases, and the pressure difference ΔP gradually decreases. As a result, the inward tendency of each movable fuel baffle gradually decreases, which can adaptively regulate the fuel flow rate, ensure the uniformity of the fuel flow rate sprayed by each new self-excited sweeping fuel nozzle, and thus ensure the degree of fuel atomization, ultimately improving the combustion efficiency of the afterburner.

[0036] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A multi-hole self-excited sweeping type fuel injector adaptive fuel flow regulating device, characterized in that: The device includes a nozzle connection part and a flow-sensing adjustment part. The nozzle connection part includes a fixed fuel baffle, a top connecting strip, a bottom connecting strip, and a side connecting strip. The fixed fuel baffle is an arc-shaped elongated plate. Side connecting strips, top connecting strips, and bottom connecting strips are respectively provided on one side and at the top and bottom ends of the elongated plate. A concave elastic groove is provided on the other side of the elongated plate. The flow-sensing adjustment part is rotatably installed in the concave elastic groove. The flow-sensing adjustment unit includes a long strip-shaped movable fuel baffle, with an inner flow-sensing paddle and an outer flow-sensing paddle welded to the inner and outer sides of the movable fuel baffle. Both the inner and outer flow-sensing paddles are arc-shaped pieces, with the outer convexity of the inner flow-sensing paddle being greater than that of the outer flow-sensing paddle. The nozzle connection part is installed on one side of the fuel nozzle inlet via a mounting structure, and the flow-sensing adjustment part is located in front of the fuel nozzle inlet; The mounting structure includes a side mounting groove, a side wedge-shaped elastic groove, a bottom mounting groove, and a bottom wedge-shaped elastic groove. A vertical side mounting groove is provided on one side of the fuel nozzle inlet, and a bottom mounting groove is horizontally provided at both ends of the side mounting groove. The bottom mounting groove is provided on the fuel chamber wall of the fuel injection pipe. A side wedge-shaped elastic groove is embedded in the side mounting groove, and a bottom wedge-shaped elastic groove is embedded in the bottom mounting groove. The side connecting strip is snapped into the side wedge-shaped elastic groove, and the top connecting strip and the bottom connecting strip are respectively embedded in the vertically and vertically provided bottom wedge-shaped elastic grooves.

2. The multi-hole self-excited sweeping type fuel injector adaptive fuel flow regulating device according to claim 1, characterized in that: The top connecting strip, bottom connecting strip, and side connecting strip are all ellipsoidal.

3. The multi-hole self-excited sweeping type fuel injector adaptive fuel flow regulating device according to claim 1, characterized in that: The flow-sensing adjustment unit also includes a limiting structure, which includes a limiting groove, a self-lubricating guide rail, a self-lubricating guide plate, and a self-lubricating guide block. A downwardly oriented fan-shaped limiting groove is provided in the fuel chamber of the fuel injector. A self-lubricating guide rail is installed in the fan-shaped limiting groove. A self-lubricating guide plate is slidably installed on the self-lubricating guide rail. The self-lubricating guide plate is connected to the upper and lower end faces of the movable fuel baffle through the self-lubricating guide block. The curvature of the self-lubricating guide rail is consistent with the swing curvature of the movable fuel baffle.

4. The multi-hole self-excited sweeping type fuel injector adaptive fuel flow regulating device according to claim 1, characterized in that: Two vertical observation slits are provided along the length of the movable fuel baffle.

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