Equipment for testing injection direction of fuel manifold of engine

Abstract

The invention relates to the technical field of engine fuel oil header pipe testing, and provides equipment for testing the injection direction of an engine fuel oil header pipe, and the equipment comprises a bottom base frame, a central column installed on the bottom base frame, and an annular pipe located on the periphery of the central column. A plurality of flexible branch pipes are annularly distributed at the rear part of the annular pipe; the locking assembly is rotationally mounted on the central column and used for supporting, fixing and rotationally adjusting the annular pipe; the assembly ring plate is mounted at the rear part of the central column; and the direction finding assembly is installed on the assembling ring plate and used for fixing the flexible branch pipe nozzle to be tested and synchronously adjusting the testing direction along with the direction of the nozzle. When the device is used, integrated accurate testing of the spraying direction and quality of the nozzles of the flexible branch pipe is achieved, through full-automatic angle follow-up adjustment and multi-nozzle rapid switching, the testing efficiency is remarkably improved, abnormal splashing can be judged, and the problems of operation burden and accurate evaluation are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of engine fuel manifold testing technology, and more specifically, to a device for testing the injection direction of engine fuel manifold. Background Technology

[0002] The fuel manifold of an aircraft engine is the core component of the fuel supply system. Its core function is to collect the pressurized fuel from the fuel pump and ensure that the fuel is evenly distributed to the predetermined injection areas of the combustion chamber head with precise pressure and flow.

[0003] The main fuel line has a ring-shaped structure, with multiple branch pipes connected along its circumference via precision detachable interfaces. The nozzles connected to the branch pipes serve as the direct actuators for fuel injection, enabling directional fuel injection into the combustion chamber.

[0004] In fuel injection direction testing, there are significant differences between flexible and rigid manifolds. Flexible manifold nozzles require pre-adjustment and fixation, while the testing equipment must also be moved accordingly. This double adjustment significantly increases the burden on the testing process. Furthermore, while the commonly used target detection method can quickly determine the injection direction through fuel marks, it cannot effectively assess the nozzle's injection quality. This is because this method relies solely on fuel mark identification and cannot distinguish between the small amount of splashing produced by normal nozzle atomization and the large amount of abnormal splashing caused by severe directional errors, making it difficult to meet the requirements of accurate testing.

[0005] Therefore, this application proposes a device for testing the injection direction of the engine fuel main pipe to solve the above problems. Summary of the Invention

[0006] Technical problem to be solved: In view of the problems existing in the prior art, the purpose of this invention is to provide a device for testing the injection direction of the engine fuel main pipe, which solves the operational burden caused by the need for dual adjustment in the injection direction test of the flexible branch pipe, and the problem that the target detection method cannot accurately evaluate the injection quality based solely on oil traces.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a device for testing the injection direction of an engine fuel main pipe, comprising a base frame, a central column mounted on the base frame, and an annular pipe located around the central column. The annular pipe has an inlet pipe on its annular wall, and multiple flexible branch pipes are distributed in a ring shape at the rear of the annular pipe. A locking assembly is rotatably mounted on the central column for supporting, fixing, and adjusting the rotation of the annular pipe. An assembly ring plate is mounted at the rear of the central column. A direction-finding assembly is mounted on the assembly ring plate for fixing the nozzle of the flexible branch pipe to be tested and synchronously adjusting the test direction according to the nozzle direction. A splash detection assembly is mounted on the direction-finding assembly for collecting test fuel that has deviated from the injection direction and detecting and alarming.

[0008] In a new embodiment, the locking assembly includes: a mounting plate, rotatably mounted on the front of the central column; multiple straight rods, equidistantly annularly mounted on the outer wall of the mounting plate; each straight rod has a clamp plate at its end, and lugs are mounted on the clamp plates, with the lugs mounted on the tube body of the annular tube.

[0009] In a new embodiment, the direction finding assembly includes: a frame groove formed on an assembly ring plate; a double-column locking plate rotatably mounted in the frame groove, the middle of which is used to fix the end nozzle of the flexible branch pipe; parallel arm plates, which are installed in pairs on the two side columns of the double-column locking plate; and a test cylinder installed between the two parallel arm plates, in which a circular disc is detachably installed; the double-column locking plate and the test cylinder are arranged on the same central axis.

[0010] In a new embodiment, the inner cavity of the test cylinder is provided with a stepped annular groove, which includes a first annular groove near the opening and a second annular groove near the tail, as well as an inner annular deep groove located on the rear side of the annular wall of the first annular groove; an inner oblique ring is installed on the front annular wall of the first annular groove, and a plurality of abutments are installed in a ring shape at equal intervals on the rear part of the inner oblique ring, with the rear ends of the abutments all abutting against the front periphery of the annular disk; a unidirectional oil collecting cylinder is installed on the rear side of the bottom end of the test cylinder.

[0011] In a new embodiment, a semi-circular ring strip is installed at the rear of the annular disk. The semi-circular ring strip is embedded in a semi-circular groove. The semi-circular groove is formed on a stepped surface between the first and second annular grooves. The annular disk is made of an oleophobic material.

[0012] In a new embodiment, a rotary cylinder is provided on one side of the frame groove, and the output end of the rotary cylinder is fixedly connected to one of the columns of the double-column locking plate; a digital angle gauge is installed on the top of the double-column locking plate.

[0013] In a new embodiment, a laser emitter is installed at the rear end of the test cylinder, and the emission direction of the laser emitter is coaxial with the central axis of the test cylinder.

[0014] In a new embodiment, a drive motor is installed at the rear of the base frame, and its output end is fixedly connected to one end of an embedded shaft that is rotatably installed in the middle of the central column. The other end of the embedded shaft is fixedly connected to the rear of the mounting plate.

[0015] In a new embodiment, a plurality of tube plugs are equidistantly annularly mounted on the outer front part of the assembly ring plate, wherein the position of one of the tube plugs is replaced by a frame groove.

[0016] In a new embodiment, the splash testing assembly includes: a collecting cylinder located at the lower front end of the test cylinder, and the collecting cylinder is connected to the front end of the oil collecting cylinder via a one-way valve tube; an oil leakage pipe, one end of which is connected to the bottom of the inner ring deep groove located in the test cylinder, and the other end of which is connected to the top of the collecting cylinder; an arched elastic diaphragm installed on the bottom wall of the collecting cylinder; an inner cavity column hole is opened at the bottom wall of the collecting cylinder, which is located directly below the arched elastic diaphragm, and a stationary terminal is also installed on the bottom wall of the inner cavity column hole; an insulating push rod slidably disposed in the inner cavity column hole, the top of which is connected to the bottom of the arched elastic diaphragm, and a movable terminal is installed at the bottom, the bottom of the insulating push rod being connected to the bottom wall of the inner cavity column hole via a weak spring; an alarm installed at the bottom of the collecting cylinder, which triggers an alarm when the movable terminal contacts the stationary terminal; a protrusion fixed to the outer rear wall of the insulating push rod; and a pressure body installed on the inner rear wall of the inner cavity column hole; the protrusion presses the pressure body to open the one-way valve tube when it moves down with the insulating push rod.

[0017] Beneficial effects: Compared with the prior art, the advantages of this invention are: 1. A double-column locking plate with a flexible branch nozzle fixed to it is driven by a rotary cylinder to rotate precisely within a range of 180 degrees. The rotation angle value is displayed in real time by a digital angle meter on top of the plate. The double-column locking plate is rigidly connected to the test cylinder through parallel arm plates on both sides and drives the test cylinder synchronously. This enables the test cylinder and nozzle spray angle to be adjusted accordingly, ensuring that the test axis is adjusted synchronously and accurately with the nozzle angle. This eliminates the operational redundancy of the equipment that needs to be adjusted as the nozzle angle changes.

[0018] 2. The pipe plugs on the assembly ring plate can block non-test nozzles, ensuring that only the current target nozzle sprays fuel during testing. Together with the locking components, they provide stable multi-point support for the annular pipe, effectively preventing fuel delivery pressure fluctuations and interference from leaks in untested branch pipes, thus providing a stable injection environment for accurate measurement.

[0019] 3. By linking the rotating mounting plate of the locking component with the drive motor and the embedded shaft, the entire annular tube can be rotated in a fixed position. Different flexible branch nozzles can be quickly switched to the test station without moving the equipment itself. This enables rapid switching and testing of multiple nozzles in a fixed equipment position, eliminating the burden of moving the equipment with nozzle adjustments.

[0020] 4. The annular disc is a detachable and replaceable component. It achieves quick and accurate positioning and installation through the interlocking structure of the semi-circular ring bar and the semi-circular ring groove, as well as the contact and fixing effect of the inner inclined ring and the abutment column. According to different test standards, such as different nozzle models or spray range requirements, the staff can easily replace the annular disc with different center hole diameters, which significantly improves the adaptability and flexibility of the equipment to test scenarios with different spray diameters and spray directions.

[0021] 5. When the test fuel deviates significantly from its direction and impacts the outer plate of the annular disk, a large amount of splashed oil is guided by the inner inclined ring to the inner ring deep groove and flows into the collecting cylinder through the oil leakage pipe. When the collected oil reaches the preset volume threshold, the arched elastic diaphragm at the bottom of the collecting cylinder is concave. When it is concave, it drives the insulating push rod to move down. The movable terminal at the bottom of the insulating push rod will contact the stationary terminal on the bottom wall of the inner cavity column hole, triggering the alarm to sound a buzzer. The small amount of normally atomized splashed oil generated when the nozzle is sprayed is not enough to trigger the alarm even if it is collected. Thus, it intelligently distinguishes between normal fuel atomization and abnormal splashing caused by serious directional errors, avoiding possible misjudgments that may occur if only oil traces or the main collection volume are relied upon.

[0022] 6. The annular disk made of oleophobic material effectively reduces oil residue, facilitates disassembly and cleaning, and the test oil collected in the oil collection cylinder and the splash measuring assembly can be easily exported and recycled, reducing testing costs, facilitating equipment maintenance, and ensuring the accuracy of the next test. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the installation position of the annular tube according to the present invention.

[0024] Figure 2 This is a schematic diagram of the mounting position structure of the assembly ring plate of the present invention.

[0025] Figure 3 This is a schematic diagram of the internal structure of the central column of the present invention.

[0026] Figure 4 This is a schematic diagram of the locking component structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the frame groove position structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the double-column locking plate structure of the present invention.

[0029] Figure 7 This is a schematic diagram of the internal structure of the test cylinder of the present invention.

[0030] Figure 8 This is a schematic diagram of the mounting position structure of the annular disk according to the present invention.

[0031] Figure 9 This is a schematic diagram of the splash measurement component structure of the present invention.

[0032] Figure 10 For the present invention Figure 9 Enlarged view of the structure at point A.

[0033] Figure 11 This is a schematic diagram of the inner oblique ring structure of the present invention.

[0034] The attached diagram is labeled as follows: 1. Base frame; 2. Central column; 3. Ring pipe; 31. Oil inlet pipe; 32. Flexible branch pipe; 4. Locking assembly; 41. Mounting plate; 42. Straight rod; 43. Clamping plate; 44. Ear plate; 5. Assemble the ring plate; 6. Direction finding assembly; 61. Frame groove; 62. Double column locking plate; 63. Parallel arm plate; 64. Test cylinder; 65. Stepped annular groove; 651. First annular groove; 652. Second annular groove; 653. Inner annular deep groove; 66. Circular disc; 661. Semicircular ring bar; 662. Semicircular annular groove; 67. Inner inclined ring; 68. Abutment column; 69. Oil collecting cylinder; 610. Rotary cylinder; 611. Digital angle gauge; 612. Laser emitter; 7. Splash measurement assembly; 71. Gathering cylinder; 72. One-way valve pipe; 73. Oil leakage pipe; 74. Arched elastic diaphragm; 75. Inner cavity cylindrical hole; 76. Stationary terminal; 77. Insulating push rod; 78. Moving terminal; 79. Alarm; 710. Protrusion; 711. Contact pressure body; 8. Embedded shaft; 9. Pipe plug. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] This application provides a device for testing the injection direction of the engine fuel main pipe, which solves the operational burden caused by the need for dual adjustments in the injection direction test of flexible branch pipes, and the problem that the target detection method cannot accurately evaluate the injection quality based solely on oil traces. In use, it realizes integrated and accurate testing of the injection direction and quality of flexible branch pipe nozzles. Through fully automatic angle follow-up adjustment and rapid switching of multiple nozzles, it significantly improves testing efficiency and can identify abnormal splashes, effectively solving the problems of operational burden and accurate evaluation.

[0037] The technical solutions in this application are intended to solve the above-mentioned technical problems, and the overall approach is as follows.

[0038] Example 1, please refer to Figures 1-11This application provides an apparatus for testing the injection direction of an engine fuel main pipe, including a base frame 1, a central column 2 mounted on the base frame 1, and an annular pipe 3 located around the central column 2. The annular pipe 3 has an inlet pipe 31 on its annular wall, and multiple flexible branch pipes 32 are distributed in a ring shape at the rear of the annular pipe 3; a locking assembly 4 is rotatably mounted on the central column 2 for supporting, fixing, and rotating the annular pipe 3; an assembly ring plate 5 is mounted at the rear of the central column 2; a direction-finding assembly 6 is mounted on the assembly ring plate 5 for fixing the nozzle of the flexible branch pipe 32 to be tested and synchronously adjusting the test direction according to the nozzle direction; and a splash detection assembly 7 is mounted on the direction-finding assembly 6 for collecting the test fuel that is injected off-center and detecting and alarming.

[0039] Furthermore, the direction finding assembly 6 includes: a frame groove 61, formed on the assembly ring plate 5; a double-column locking plate 62, rotatably mounted in the frame groove 61, the middle of which is used to fix the end nozzle of the flexible branch pipe 32; parallel arm plates 63, mounted in pairs on the two side columns of the double-column locking plate 62; and a test cylinder 64, installed between the two parallel arm plates 63, in which a circular disc 66 is detachably installed; the double-column locking plate 62 and the test cylinder 64 are arranged on the same central axis.

[0040] The procedure for testing the direction of fuel injection in the main fuel line is as follows: First, the annular tube 3 is fixed to the front of the central column 2 by locking component 4. The annular tube 3 is split into two half-annular tubes, fixed in sections, and then reassembled to ensure that the annular tube 3 is installed firmly and sealed without leakage. This not only makes it easy to adapt to annular tubes 3 of a certain size range, but also ensures stable pressure during fuel delivery. Then, only the nozzle of the uppermost flexible branch tube 32 is fixed to the middle of the double column locking plate 62 as the current test object. The nozzles of the other flexible branch tubes 32 are sealed by the tube plug block 9 on the assembly ring plate 5 to avoid interference from leakage of untested branch tubes. This ensures that the test fuel is sprayed from only a single nozzle, focusing on the detection of a single injection direction. Second, the rotary cylinder 610 is activated, driving the double-column locking plate 62 to rotate within the frame groove 61 (the frame groove 61 is optimally positioned at the top of the assembly ring plate 5). This, in turn, drives the test cylinder 64 to rotate synchronously via the parallel arm plate 63. This ensures that the nozzle of the flexible branch pipe 32 fixed on the double-column locking plate 62 and the test cylinder 64 always maintain the same central axis, guaranteeing precise alignment of the preset injection direction with the axis of the test cylinder 64, providing a reference axis for direction detection. Simultaneously, the digital angle gauge 611 on top of the double-column locking plate 62 can display the rotation angle in real time, facilitating the operator's reading of the current test angle. It should be noted that, considering the actual operating conditions of engine fuel injection, the injection direction detection angle is typically set within the range of 15° to 120°, while the rotation range of the double-column locking plate 62 is 0° to 180°, thus covering the injection direction detection range. Third, after being pressurized, the test oil enters the annular pipe 3 through the oil inlet pipe 31, and then is sprayed out through the nozzle of the fixed flexible branch pipe 32. The spray pressure and flow rate can be preset according to the test standard. If the spray direction conforms to the standard (consistent with the axis of the test cylinder 64), the test oil will accurately pass through the central hole of the annular disk 66 (the diameter of the central hole matches the standard spray range), enter the second annular groove 652 of the stepped annular groove 65 of the test cylinder 64, and flow into the unidirectional oil collecting cylinder 69 for collection. The liquid level scale on its outer wall can be used to directly read the fuel quantity. If the spray direction deviates, the test oil will hit the plate surface of the annular disk 66 instead of completely passing through the central hole, resulting in a significant reduction in the amount of fuel entering the second annular groove 652. The liquid level in the oil collecting cylinder 69 will be lower than the preset threshold, which directly reflects the misalignment of the spray direction. The annular disk 66 is a detachable component, and different annular disks 66 with different center hole diameters can be replaced according to testing requirements to adapt to testing scenarios with different nozzle spray ranges. The installation process of the annular disk 66 is as follows: first, the annular disk 66 is placed into the opening of the test cylinder 64 and compacted by an external pressure roller (not shown in the figure), and then it stops at the step of the stepped annular groove 65. Then, the inner inclined ring 67 is installed at the opening of the test cylinder 64, and the annular disk 66 is further fixed by the abutment 68 on the inner inclined ring 67. The disassembly process is the reverse: take out the inner inclined ring 67, and then use a hook tool to hook the edge of the hole of the annular disk 66 and pull it out.

[0041] It is important to note that during the injection process, a small amount of splashing may occur around the nozzle of the flexible branch pipe 32. This is normal fuel atomization loss and is not entirely caused by the deviation in the injection direction. If the injection direction is judged solely by the amount of fuel in the oil collecting cylinder 69, misjudgment may occur. Therefore, this device adopts a dual judgment mechanism combining the splash measuring component 7 and the oil collecting cylinder 69. When the nozzle of the flexible branch pipe 32 splashes from the periphery, a small amount of oil will accumulate in the inner ring deep groove 653 and enter the splash measuring component 7. Since the amount of oil is small, it is insufficient to trigger the alarm of the splash measuring component 7. However, when a large amount of oil enters the splash measuring component 7 and triggers the alarm, it indicates that the nozzle's injection direction is severely tilted and overflowing, and has hit the outer surface of the annular disk 66. At this time, the test should be stopped immediately, and the test should be repeated after adjustment. After the test, the removable annular disk 66 can be cleaned to prevent residual fuel from affecting the next test. The oil collection cylinder 69 and the collection cylinder 71 of the splash measuring component 7 can export the collected test oil for recycling.

[0042] Please see Figure 3 and Figure 4The locking assembly 4 includes: a mounting plate 41, which is rotatably mounted on the front of the central column 2; a straight rod 42, which is provided in multiple equidistant rings and mounted on the outer wall of the mounting plate 41; a clamping plate 43 is mounted on the end of each straight rod 42, and an ear piece 44 is mounted on the clamping plate 43, and multiple ear pieces 44 are mounted on the tube body of the annular tube 3.

[0043] By setting up a mounting plate 41, straight rods 42, clamping plate 43, and lugs 44, the mounting plate 41 is rotatably mounted on the front of the central column 2 as a basic support. Multiple straight rods 42, which are distributed in a ring at equal intervals, extend from the outer wall of the mounting plate 41 and are bolted to the lugs 44 on the body of the annular tube 3 through the clamping plate 43, forming a fixed structure with multiple points of uniform force, locking the annular tube 3 on the central column 2, and preventing the annular tube 3 from shaking due to pressure fluctuations during fuel delivery.

[0044] Please see Figures 7-9 and Figure 11 The inner cavity of the test cylinder 64 is provided with a stepped annular groove 65, which includes a first annular groove 651 near the opening and a second annular groove 652 near the tail, as well as an inner annular deep groove 653 located on the rear side of the annular wall of the first annular groove 651; an inner inclined ring 67 is installed on the front annular wall of the first annular groove 651, and multiple abutments 68 are installed in a ring at equal intervals on the rear part of the inner inclined ring 67, with the rear ends of the abutments 68 all abutting the front periphery of the annular disk 66; a unidirectional oil collection cylinder 69 is installed on the middle and rear side of the bottom end of the test cylinder 64.

[0045] The steps created by the first annular groove 651 and the second annular groove 652 facilitate the placement of the detachably mounted annular disk 66. Furthermore, by setting an inner inclined ring 67, when the test oil injection direction deviates, the splashed fuel impacting the surface of the annular disk 66 is blocked in front of the disk and accumulates in the inner deep groove 653. However, due to the high impact pressure of the injection, the splashed fuel may splash outwards again due to the counter-impact of the annular disk 66, failing to collect and drip into the inner deep groove 653. Therefore, an inner inclined ring 67 is installed at the front of the stepped annular groove 65. This inclined structure guides this portion of the oil into the inner deep groove 653, allowing the splashed fuel to flow more concentratedly to the collection area of ​​the splash testing component 7, improving the efficiency of the splash testing component 7 in capturing abnormal fuel and reducing the risk of missed detection due to fuel diffusion. Simultaneously, the equidistant abutments 68 at the rear of the inner inclined ring 67 further stabilize the annular disk 66, preventing it from falling during the upward tilting of the test cylinder 64.

[0046] Secondly, due to its concave shape, the inner ring deep groove 653 can better collect and flow into the connected oil leakage pipe 73 and the collection cylinder 71, so that the splashed oil or oil impacted by the wrong direction that is blocked by the surface of the ring disk 66 can be collected.

[0047] Please see Figure 8A semi-circular ring 661 is installed at the rear of the annular disk 66. The semi-circular ring 661 is embedded in the semi-circular annular groove 662. The semi-circular annular groove 662 is formed on the stepped surface between the first annular groove 651 and the second annular groove 652. The annular disk 66 is made of oleophobic material. By setting the semi-circular ring 661 and the semi-circular annular groove 662, the semi-circular ring 661 is embedded in the semi-circular annular groove 662, providing a precise positioning reference for the annular disk 66. This avoids the inaccurate position of the injection target due to the offset of the annular disk 66, which would affect the accuracy of the injection direction judgment. At the same time, it also prevents shaking when the injected fuel impacts and facilitates quick disassembly and assembly. The annular disk 66 is made of oleophobic material, which effectively optimizes the interaction between the fuel and the plate wall. The oleophobic properties make the fuel injected onto the plate wall less likely to adhere and can quickly drip down along the wall surface, reducing the amount of fuel residue on the plate wall.

[0048] Please see Figure 5 and Figure 6 A rotary cylinder 610 is provided on one side of the frame groove 61, and the output end of the rotary cylinder 610 is fixedly connected to one side of the column of the double column locking plate 62. A digital angle meter 611 is installed on the top of the double column locking plate 62. By setting the rotary cylinder 610 and the digital angle meter 611, the rotary cylinder 610 drives the double column locking plate 62 to rotate stably, so as to perform more precise angle adjustment and test the fuel manifold injection direction at different angles. The digital angle meter 611 installed on the top of the double column locking plate 62 can display the current rotation angle of the double column locking plate 62 in real time, intuitively present the angle value, and avoid the visual error of manual reading.

[0049] Please see Figures 7-9 A laser emitter 612 is installed at the rear end of the test cylinder 64. The emission direction of the laser emitter 612 is coaxial with the central axis of the test cylinder 64. By setting the laser emitter 612, the laser beam can be accurately projected along the central axis of the test cylinder 64, which can intuitively reflect the actual axial position of the test cylinder 64. With the flexible branch pipe 32 nozzle fixed on the double column locking plate 62 (the nozzle is wrapped with a self-centering cap, which is removed during spray testing. Its main function is to position and adjust the nozzle, and it is not shown in the figure), the laser beam is coaxial with the center of the centering cap. The operator can use this to quickly determine the nozzle position and adjust the installation.

[0050] Please see Figure 3 and Figure 4A drive motor is installed at the rear of the base frame 1. Its output end is fixedly connected to one end of the embedded shaft 8, which is rotatably installed in the middle of the central column 2. The other end of the embedded shaft 8 is fixedly connected to the rear of the mounting plate 41. The embedded shaft 8 is rotatably installed in the middle of the central column 2. By setting the drive motor and the embedded shaft 8, the drive motor drives the embedded shaft 8 to rotate. The embedded shaft 8 then drives the mounting plate 41 to rotate, thereby driving the annular tube 3 fixed on the mounting plate 41 to rotate, so that the annular tube 3 can be replaced with other flexible branch pipes 32 for nozzle spray direction detection.

[0051] Please see Figures 1-3 Multiple pipe plugs 9 are equidistantly annularly installed on the front outer side of the assembly ring plate 5. The position of one of the pipe plugs 9 is replaced by the frame groove 61. By setting the pipe plugs 9, during single nozzle testing, the nozzles of the other branch pipes can be quickly sealed by inserting the pipe plugs 9, avoiding fuel leakage from interfering with the test environment. At the same time, it prevents pressure fluctuations caused by fuel retention in the untested branch pipes, ensuring stable fuel injection pressure of the currently tested nozzle and guaranteeing the accuracy of the test data.

[0052] Please see Figures 8-10 The splash testing assembly 7 includes: a collecting cylinder 71, located at the lower front end of the test cylinder 64, and connected to the front end of the oil collecting cylinder 69 via a one-way valve pipe 72; an oil leakage pipe 73, one end of which is connected to the bottom of the inner ring deep groove 653 located in the test cylinder 64, and the other end of which is connected to the top of the collecting cylinder 71; an arched elastic diaphragm 74, installed on the bottom wall of the collecting cylinder 71; an inner cavity column hole 75 is opened at the bottom wall of the collecting cylinder 71, located directly below the arched elastic diaphragm 74, and a stationary terminal 76 is also installed on the bottom wall of the inner cavity column hole 75; and an insulating push rod 77. The insulating push rod 77 is slidably disposed within the inner cavity column hole 75, with its top connected to the bottom of the arched elastic diaphragm 74 and a movable terminal 78 installed at its bottom. The bottom of the insulating push rod 77 is connected to the bottom wall of the inner cavity column hole 75 via a weak spring. An alarm 79 is installed at the bottom of the collecting cylinder 71 and triggers an alarm when the movable terminal 78 contacts the stationary terminal 76. A protrusion 710 is fixed to the outer rear wall of the insulating push rod 77. A pressing body 711 is installed on the inner rear wall of the inner cavity column hole 75. When the protrusion 710 moves down with the insulating push rod 77, it presses the pressing body 711 to open the one-way valve tube 72.

[0053] If the oil flowing into the collecting cylinder 71 through the oil leakage pipe 73 reaches the detection threshold liquid volume, the liquid pressure will compress the arched elastic diaphragm 74 into a concave shape. When it concaves, it will drive the insulating push rod 77 to move downward. The movable terminal 78 at the bottom of the insulating push rod 77 will contact the stationary terminal 76 on the bottom wall of the inner cavity column hole 75, triggering the alarm 79 to sound a buzzer alarm, which will promptly remind the operator that there is an extremely serious abnormality in the spray direction. Conversely, if the oil does not reach the detection threshold liquid volume, the arched elastic diaphragm 74 will not be affected by the liquid pressure. It should be noted that the arched elastic diaphragm 74 will undergo inward deformation under the pressure of the oil entering the bottom of the collecting cylinder 71. The pressure it withstands can be adjusted by replacing the arched elastic diaphragm 74 with one of different stiffness. Synchronously, the downward movement of the insulating push rod 77 causes the connected protrusion 710 to squeeze the contact body 711. This action triggers the one-way valve pipe 72 connected to the contact body 711 to open briefly (the opening time can be set). At this time, the rotary cylinder 610 can assist in rotating a certain angle, causing the test cylinder 64 and the collecting cylinder 71 to tilt, so that the oil in the collecting cylinder 71 is quickly discharged into the oil collecting cylinder 69 and discharged. This not only avoids the oil accumulation affecting subsequent tests, but also realizes the response of alarm oil discharge, improving the continuity of testing. At the same time, the weak spring provides a small upward force for the arched elastic diaphragm 74, which makes it easy for the arched elastic diaphragm 74 to return to its original shape, and does not affect the concave detection of the arched elastic diaphragm 74.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An apparatus for testing the injection direction of an engine fuel main, comprising a base frame (1), a central column (2) mounted on the base frame (1), and an annular pipe (3) located around the central column (2), characterized in that, The annular pipe (3) is provided with an oil inlet pipe (31) on its annular wall, and multiple flexible branch pipes (32) are distributed in a ring shape at the rear of the annular pipe (3). The locking component (4) is rotatably mounted on the central column (2) and is used to support, fix and rotate the annular tube (3). Assemble the ring plate (5) and install it at the rear of the central column (2); The direction finding component (6) is installed on the assembly ring plate (5) to fix the nozzle of the flexible branch pipe (32) to be tested and to adjust the test direction synchronously with the nozzle direction; The direction finding component (6) includes: a frame groove (61) formed on the assembly ring plate (5); A double-column locking plate (62) is rotatably installed in a frame groove (61), the middle of which is used to fix the end nozzle of the flexible branch pipe (32); parallel arm plates (63) are installed in pairs on the two side columns of the double-column locking plate (62); a test cylinder (64) is installed between the two parallel arm plates (63), and a circular disc (66) is detachably installed inside it; the double-column locking plate (62) and the test cylinder (64) are arranged on the same central axis; The splash detection component (7) is mounted on the direction detection component (6) and is used to collect test fuel that is sprayed off course and detect alarms.

2. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The locking component (4) includes: Mounting plate (41) is rotatably mounted on the front of the central column (2); Multiple straight rods (42) are provided and are installed in an equidistant ring on the outer wall of the mounting plate (41); Each of the straight rods (42) is equipped with a clamp plate (43), and an ear piece (44) is installed on the clamp plate (43). Multiple ear pieces (44) are installed on the tube body of the annular tube (3).

3. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The inner cavity of the test tube (64) is provided with a stepped annular groove (65), which includes a first annular groove (651) near the opening and a second annular groove (652) near the tail, as well as an inner annular deep groove (653) located on the rear side of the annular wall of the first annular groove (651). An inner inclined ring (67) is installed on the front ring wall of the first annular groove (651), and multiple abutments (68) are installed in a ring shape at equal intervals at the rear of the inner inclined ring (67). The rear ends of the abutments (68) all abut against the front periphery of the circular disc (66). A one-way oil collecting cylinder (69) is installed on the rear side of the bottom of the test cylinder (64).

4. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The annular disk (66) is equipped with a semi-circular ring strip (661) at the rear. The semi-circular ring strip (661) is embedded in the semi-circular ring groove (662). The semi-circular ring groove (662) is a stepped surface between the first ring groove (651) and the second ring groove (652). The annular disk (66) is made of an oleophobic material.

5. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, A rotary cylinder (610) is provided on one side of the frame groove (61), and the output end of the rotary cylinder (610) is fixedly connected to one side column of the double column locking plate (62). A digital angle gauge (611) is installed at the top of the double-column locking plate (62).

6. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, A laser emitter (612) is installed at the rear end of the test tube (64), and the emission direction of the laser emitter (612) is coaxial with the central axis of the test tube (64).

7. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The base frame (1) is equipped with a drive motor at the rear. Its output end is fixedly connected to one end of the embedded shaft (8) which is rotatably installed in the middle of the central column (2). The other end of the embedded shaft (8) is fixedly connected to the rear of the mounting plate (41).

8. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The front outer side of the assembly ring plate (5) is provided with a plurality of pipe plugs (9) installed in an equidistant ring, one of which is replaced by a frame groove (61).

9. The device for testing the injection direction of an engine fuel main as described in claim 1, characterized in that, The splash measurement component (7) includes: The collecting cylinder (71) is located at the lower front end of the test cylinder (64), and the collecting cylinder (71) is connected to the front end of the oil collecting cylinder (69) through the one-way valve pipe (72); The oil leakage pipe (73) is connected at one end to the bottom of the inner ring deep groove (653) located in the test cylinder (64), and at the other end to the top of the collection cylinder (71); An arched elastic diaphragm (74) is installed on the bottom wall of the collecting cylinder (71); The bottom wall of the collecting cylinder (71) is provided with an inner cavity column hole (75), which is located directly below the arched elastic diaphragm (74). A stationary terminal (76) is also installed on the bottom wall of the inner cavity column hole (75). An insulating push rod (77) is slidably disposed in the inner cavity column hole (75). Its top is connected to the bottom of the arched elastic diaphragm (74), and a movable terminal (78) is installed at the bottom. The bottom of the insulating push rod (77) is connected to the bottom wall of the inner cavity column hole (75) through a weak spring. An alarm (79) is installed at the bottom of the collecting cylinder (71) and is triggered when the moving terminal (78) contacts the stationary terminal (76). The protrusion (710) is fixed to the outer rear wall of the insulating push rod (77); The pressure body (711) is installed on the inner wall of the rear part of the inner cavity column hole (75); the protrusion (710) presses the pressure body (711) to open the one-way valve tube (72) when the insulating push rod (77) moves down.

Images