An apparatus for engine fuel rail injection direction testing

Abstract

The present application relates to the technical field of engine fuel manifold testing, and provides an equipment for testing the injection direction of an engine fuel manifold, comprising a bottom base, a center column installed on the bottom base, and an annular pipe located at the periphery of the center column, wherein the annular pipe is provided with an oil inlet pipe on the annular wall, and a plurality of flexible branch pipes are annularly distributed at the rear of the annular pipe; a locking assembly is rotatably installed on the center column and used for supporting and fixing the annular pipe and rotatingly adjusting the annular pipe; an assembly ring plate is installed at the rear of the center column; a direction testing assembly is installed on the assembly ring plate and used for fixing a flexible branch pipe nozzle to be tested and synchronously adjusting the testing direction with the nozzle direction. When the present application is used, the integrated and accurate testing of the injection direction and quality of the flexible branch pipe nozzle is realized, the testing efficiency is significantly improved through full-automatic angle follow-up adjustment and multi-nozzle quick switching, and the problem of operation burden and accurate evaluation can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine fuel manifold testing, in particular to a device for testing the injection direction of an engine fuel manifold. BACKGROUND

[0002] The fuel manifold of an aero-engine is the core component of the fuel supply system, and its core function is to collect the pressurized fuel from the fuel pump and ensure that the fuel is evenly distributed to each predetermined injection area of the combustion chamber head at a precise pressure and flow rate.

[0003] The fuel manifold body is in a ring structure, and multiple branch pipes are connected along the circumference of the ring structure through precise detachable interfaces, and the nozzles connected by the branch pipes serve as the direct execution components of fuel injection to achieve directional fuel injection to the combustion chamber.

[0004] In the fuel injection direction test, there are significant differences between flexible branch pipes and rigid branch pipes. The nozzle of the flexible branch pipe needs to be pre-adjusted in angle and fixed, and the test equipment also needs to be moved accordingly. This double adjustment significantly increases the burden of the detection process. In addition, although the commonly used target detection method can quickly judge the injection direction through oil marks, it cannot effectively evaluate the injection quality of the nozzle. Because this method only relies on oil marks for identification, it cannot distinguish between a small amount of splashing caused by normal atomization of the nozzle and a large amount of abnormal splashing caused by a serious error in direction, making it difficult to meet the requirements of accurate testing.

[0005] Therefore, the present application provides a device for testing the injection direction of an engine fuel manifold to solve the above problems. SUMMARY

[0006] The technical problem to be solved is that, in view of the problems in the prior art, the present application aims to provide a device for testing the injection direction of an engine fuel manifold, which solves the problem of operational burden caused by double adjustment in the flexible branch pipe injection direction test, and the problem that the target detection method cannot accurately evaluate the injection quality based on oil marks only.

[0007] To solve the above technical problems, the present application provides the following technical solution: a device for testing the injection direction of an engine fuel manifold, comprising a base frame, a center column mounted on the base frame, and a ring-shaped pipe located on the periphery of the center column, wherein the ring wall of the ring-shaped pipe is provided with an oil inlet pipe, and a plurality of flexible branch pipes are distributed in a ring shape at the rear of the ring-shaped pipe; a locking assembly is rotatably mounted on the center column and used to support and fix the ring-shaped pipe and rotate the ring-shaped pipe; an assembly ring plate is mounted at the rear of the center column; a direction-finding assembly is mounted on the assembly ring plate and used to fix the nozzle of the flexible branch pipe to be tested and adjust the test direction synchronously with the direction of the nozzle; and a splashing detection assembly is mounted on the direction-finding assembly and used to collect the test fuel deviated by the nozzle and detect and alarm.

[0008] In a new embodiment, the locking assembly comprises: a mounting disc rotatably mounted on the front of the central column; a plurality of straight rods equidistantly and annularly mounted on the outer wall of the mounting disc; a clamping plate mounted on the end of each straight rod, and an ear mounted on the clamping plate, and a plurality of ears mounted on the pipe of the annular pipe.

[0009] In a new embodiment, the direction-finding assembly comprises: a frame slot formed on the assembly ring plate; a double-column locking plate rotatably mounted in the frame slot, the middle part of which is used for fixing the end nozzle of the flexible branch pipe; a pair of parallel arm plates mounted on the two side columns of the double-column locking plate; and a test cylinder mounted between the two parallel arm plates, and a circular ring disc detachably mounted in the test cylinder.

[0010] In a new embodiment, the inner cavity of the test cylinder is provided with a stepped ring groove, which comprises a first ring groove close to the opening, a second ring groove close to the tail, and an inner ring deep groove located on the rear side of the ring wall of the first ring groove; an inner inclined ring is mounted on the front part of the ring wall of the first ring groove, and a plurality of abutting columns are equidistantly and annularly mounted on the rear part of the inner inclined ring, and the rear ends of the abutting columns abut against the front outer periphery of the circular ring disc; and a one-way oil collecting cylinder is mounted on the middle rear side of the bottom end of the test cylinder.

[0011] In a new embodiment, a semicircular ring strip is mounted on the rear part of the circular ring disc, the semicircular ring strip is embedded in a semicircular ring groove, the semicircular ring groove is formed on the step surface between the first ring groove and the second ring groove, and the circular ring disc is made of an oil-repellent material.

[0012] In a new embodiment, a rotary air cylinder is arranged on one side of the frame slot, and the output end of the rotary air cylinder is fixedly connected with one side column of the double-column locking plate; and a digital angle gauge is mounted on the top end of the double-column locking plate.

[0013] In a new embodiment, a laser emitter is mounted on 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 driving motor is mounted on the rear part of the base frame, the output end of the driving motor is fixedly connected with one end of a sunken shaft rotatably mounted on the middle part of the central column, and the other end of the sunken shaft is fixedly connected with the rear part of the mounting disc.

[0015] In a new embodiment, a plurality of pipe plug blocks are equidistantly and annularly mounted on the front outer side of the assembly ring plate, and one of the pipe plug blocks is replaced by the frame slot.

[0016] In a new embodiment, the measuring and spraying assembly comprises: a collecting cylinder located at the lower part of the front end of the test cylinder and connected to the front end of the oil collecting cylinder through a one-way valve pipe; an oil leakage pipe, one end of which is connected to the bottom of the inner ring deep groove in the test cylinder, and the other end 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 formed in the bottom wall of the collecting cylinder, which is located directly below the arched elastic diaphragm, and a static terminal is installed on the bottom wall of the inner cavity column hole; an insulating push rod is slidably arranged in the inner cavity column hole, the top of the insulating push rod is connected to the bottom of the arched elastic diaphragm, a dynamic terminal is installed at the bottom of the insulating push rod, and the bottom of the insulating push rod is connected to the bottom wall of the inner cavity column hole through a weak spring; an alarm is installed at the bottom of the collecting cylinder, which is triggered when the dynamic terminal contacts the static terminal; a protrusion is fixed to the rear outer wall of the insulating push rod; a touch body is installed on the rear inner wall of the inner cavity column hole; when the protrusion moves downward with the insulating push rod, it presses the touch body to open the one-way valve pipe.

[0017] Advantages: Compared with the prior art, the advantages of the present application are:

[0018] 1. The double-column locking plate fixed with the flexible branch pipe nozzle is driven by the rotary air cylinder to rotate accurately within a range of 180 degrees, and the rotation angle value is displayed in real time by the digital angle instrument at the top of the double-column locking plate, and the double-column locking plate is rigidly connected and synchronously driven by the parallel arm plates on both sides to drive the test cylinder, so that the test cylinder and the nozzle spray angle are adjusted synchronously, the test axis is adjusted accurately and synchronously with the nozzle angle, and the operation redundancy of the device is eliminated.

[0019] 2. The pipe plug provided on the assembly ring plate can block the non-test nozzle, so that only the current target nozzle sprays oil during the test, and the stable multi-point support of the locking assembly on the annular pipe effectively prevents the interference of fuel delivery pressure fluctuation and untested branch pipe leakage, and provides a stable spraying environment for accurate measurement.

[0020] 3. The rotary mounting disc of the locking assembly is connected with the driving motor and the embedded shaft, so that the annular pipe can rotate in the fixed position, without moving the device itself, different flexible branch pipe nozzles can be quickly switched to the test station, and the multi-nozzle quick switching detection is realized in the fixed device position, and the burden of moving the device with the nozzle adjustment is eliminated.

[0021] 4. The circular ring disc is a detachable and replaceable component, which is quickly and accurately positioned and installed through the embedded structure of the semicircular ring strip and the semicircular ring groove, and is fixed by the inner inclined ring and the resistance column, and the staff can easily replace the circular ring disc with different center hole diameters according to different test standards, such as different nozzle models or spraying range requirements, which significantly improves the adaptability and flexibility of the device to different spray direction test scenarios of different spray diameters.

[0022] 5、When the test fuel collides with the outer ring plate surface due to serious directional deviation, a large amount of splashed oil will be guided by the inner inclined ring to the inner ring deep groove, and then flow 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, the insulated push rod is lowered, and the movable terminal at the bottom of the insulated push rod will contact the static terminal on the bottom wall of the inner cavity column hole, triggering the buzzer to issue a buzzing alarm. The normal atomized small amount of splashed oil generated by the nozzle during spraying is not enough to trigger the alarm even if it is collected. Thus, the normal fuel atomization phenomenon and the abnormal splashing caused by serious directional deviation are intelligently distinguished, and false judgment caused by relying only on oil marks or main collection amount is avoided.

[0023] 6、The oil ring disc made of oil-repellent material effectively reduces oil residue, facilitates disassembly and cleaning, and the test oil collected in the oil collection cylinder and the collecting cylinder in the splashing measurement assembly can be conveniently guided out and recycled, thereby reducing the test cost, facilitating equipment maintenance, and ensuring the accuracy of the next test. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an installation position structure diagram of the annular tube of the application.

[0025] Figure 2 It is an installation position structure diagram of the assembly ring plate of the application.

[0026] Figure 3 It is an internal structure diagram of the central column of the application.

[0027] Figure 4 It is a structure diagram of the locking assembly of the application.

[0028] Figure 5 It is a frame slot position structure diagram of the application.

[0029] Figure 6 It is a structure diagram of the double-column locking plate of the application.

[0030] Figure 7 It is an internal structure diagram of the test cylinder of the application.

[0031] Figure 8 It is an installation position structure diagram of the annular ring disc of the application.

[0032] Figure 9 It is a structure diagram of the splashing measurement assembly of the application.

[0033] Figure 10 It is a structure diagram of the Figure 9 of the application.

[0034] Figure 11 It is a structure diagram of the inner inclined ring of the application.

[0035] Figure 1, base frame; 2, center column; 3, ring pipe; 31, oil inlet pipe; 32, flexible branch pipe;

[0036] 4, locking assembly; 41, mounting disc; 42, straight rod; 43, clamping plate; 44, ear;

[0037] 5, assembly ring plate;

[0038] 6, direction finding assembly; 61, frame slot; 62, double-column locking plate; 63, parallel arm plate; 64, test cylinder; 65, stepped ring groove; 651, first ring groove; 652, second ring groove; 653, inner ring deep groove; 66, circular ring disc; 661, semicircular ring strip; 662, semicircular ring groove; 67, inner inclined ring; 68, abutment column; 69, oil collection cylinder; 610, rotary air cylinder; 611, digital angle gauge; 612, laser emitter;

[0039] 7, splash measurement assembly; 71, collection cylinder; 72, one-way valve pipe; 73, oil leakage pipe; 74, arched elastic diaphragm; 75, inner cavity column hole; 76, static terminal; 77, insulating push rod; 78, dynamic terminal; 79, alarm; 710, protrusion; 711, touch pressure body;

[0040] 8, embedded shaft; 9, pipe plug. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0042] The embodiments of the present application provide a device for testing the injection direction of an engine fuel manifold, solve the operation burden caused by double adjustment in the flexible branch pipe injection direction test, and the problem that the target detection method cannot accurately evaluate the injection quality only by oil marks. In use, the device realizes integrated and accurate testing of the flexible branch pipe nozzle injection direction and quality, significantly improves the testing efficiency through full-automatic angle follow-up adjustment and multi-nozzle rapid switching, and can identify abnormal splashing, effectively solving the operation burden and accurate evaluation problem.

[0043] The technical solutions in the embodiments of the present application are as follows to solve the above technical problems.

[0044] Embodiment one, please refer to Figures 1-11The embodiment of the application provides a device for testing the injection direction of an engine fuel manifold, which comprises a base frame 1, a center column 2 mounted on the base frame 1, and an annular pipe 3 located at the periphery of the center column 2, wherein the annular wall of the annular pipe 3 is provided with an oil inlet pipe 31, and a plurality of flexible branch pipes 32 are annularly distributed at the rear of the annular pipe 3; a locking assembly 4 is rotatably mounted on the center column 2 and used for supporting and fixing the annular pipe 3 and rotatingly adjusting the annular pipe 3; an assembly ring plate 5 is mounted at the rear of the center column 2; a direction measuring assembly 6 is mounted on the assembly ring plate 5 and used for fixing a nozzle of a flexible branch pipe 32 to be tested and synchronously adjusting a test direction with the nozzle direction; and a splash measuring assembly 7 is mounted on the direction measuring assembly 6 and used for gathering test fuel deviated from the nozzle and detecting and alarming.

[0045] Further, the direction measuring assembly 6 comprises a frame groove 61 formed in the assembly ring plate 5, a double-column locking plate 62 rotatably mounted in the frame groove 61 and used for fixing the end nozzle of the flexible branch pipe 32, a pair of parallel arm plates 63 mounted on the two side columns of the double-column locking plate 62, and a test cylinder 64 mounted between the two parallel arm plates 63 and provided with a circular ring disc 66 detachably mounted in the test cylinder 64, wherein the double-column locking plate 62 and the test cylinder 64 are arranged on the same central axis.

[0046] The working procedure of the fuel manifold injection direction test is as follows:

[0047] First, the annular pipe 3 is fixed at the front of the center column 2 by the locking assembly 4, and the annular pipe 3 is split into two half annular pipes, fixed and combined, so as to ensure that the annular pipe 3 is stably mounted and sealed without leakage, which is convenient for adapting to annular pipes 3 of a certain range of sizes and ensures the stable pressure during fuel delivery; then, only the nozzle of the uppermost flexible branch pipe 32 is fixed in the middle of the double-column locking plate 62 as the current test object, and the nozzles of the remaining flexible branch pipes 32 are plugged by pipe plug blocks 9 on the assembly ring plate 5 to avoid liquid leakage interference of the untested branch pipes and ensure that the test fuel is only sprayed from a single nozzle for focusing on the detection of a single injection direction;

[0048] Second, the rotary air cylinder 610 is started to drive the double-column locking plate 62 to rotate in the frame groove 61 (the frame groove 61 is the best position on the top of the assembly ring plate 5), the test cylinder 64 is synchronously driven to rotate by the parallel arm plates 63, the nozzle of the flexible branch pipe 32 fixed on the double-column locking plate 62 always keeps the same central axis with the test cylinder 64, the preset injection direction is accurately aligned with the axis of the test cylinder 64, and a reference axis is provided for direction detection; at the same time, the digital angle indicator 611 on the top of the double-column locking plate 62 can display the rotation angle in real time, which is convenient for the operator to read the current test angle; it should be noted that, in combination with the actual working condition of engine fuel injection, the injection direction detection angle is usually set in the range of 15°-120°, the rotation range of the double-column locking plate 62 is 0°-180°, and therefore the injection direction detection range can be covered;

[0049] Third, after the test oil is pressurized, it enters the annular pipe 3 through the oil inlet pipe 31, and is sprayed out through the nozzle of the fixed flexible branch pipe 32. The spraying pressure and flow can be preset according to the test standard. If the spraying direction meets the standard (consistent with the axis of the test cylinder 64), the test oil will accurately pass through the center hole of the circular ring disc 66 (the center hole diameter matches the standard spraying range), enter the second ring groove 652 of the stepped ring groove 65 of the test cylinder 64, and flow into the one-way conducting oil collection cylinder 69 for collection. The liquid level scale on the outer wall can directly read the fuel quantity; if the spraying direction deviates, the test oil will hit the plate surface of the circular ring disc 66 instead of completely passing through the center hole, resulting in a significant reduction in the amount of fuel entering the second ring groove 652, and the liquid level of the oil collection cylinder 69 is lower than the preset threshold, directly reflecting the misalignment of the spraying direction.

[0050] Among them, the circular ring disc 66 is a detachable component, which can be replaced with different center hole diameters according to test requirements to adapt to different nozzle spraying range test scenarios; at the same time, the installation process of the circular ring disc 66 is to first put the circular ring disc 66 into the opening of the test cylinder 64, and then press it flat by using an external press rod (not shown in the figure), and then stay at the step of the stepped ring groove 65, and then install the inner inclined ring 67 at the opening of the test cylinder 64, and use the stop column 68 on the inner inclined ring 67 to further fix the circular ring disc 66. The disassembly process is the reverse, that is, remove the inner inclined ring 67, and then use a hook tool to hook the edge of the hole of the circular ring disc 66 to pull it out.

[0051] It should be noted that during the spraying process, the nozzle of the flexible branch pipe 32 may have a small amount of splashing on the periphery, which is a normal fuel atomization loss and is not completely caused by the deviation of the spraying direction. If only the amount of fuel in the oil collection cylinder 69 is used to judge whether the spraying direction is qualified, it may lead to misjudgment. Therefore, the device adopts a double-judgment mechanism of the splashing measurement assembly 7 combined with the oil collection cylinder 69. When the nozzle of the flexible branch pipe 32 has peripheral splashing, a small amount of oil will be collected through the inner ring deep groove 653 and enter the splashing measurement assembly 7. Since the oil quantity is small, it is not enough to trigger the alarm of the splashing measurement assembly 7. When the splashing measurement assembly 7 is filled with a large amount of oil and triggers the alarm, it indicates that the spraying direction of the nozzle is severely tilted and overflowed, and has hit the peripheral plate surface of the circular ring disc 66. At this time, the detection needs to be stopped in time and restarted after adjustment.

[0052] After the test is completed, the detachable circular ring disc 66 can be cleaned to avoid the influence of residual fuel on the next test. The oil collection cylinder 69 and the collection cylinder 71 of the splashing measurement assembly 7 can guide the collected test oil to realize recycling.

[0053] Please refer to Figure 3 and Figure 4, the locking assembly 4 comprises: a mounting disc 41 rotatably mounted on the front of the center column 2; a plurality of straight rods 42 arranged in a ring shape at equal intervals and mounted on the outer wall of the mounting disc 41; a clamping plate 43 mounted at the end of each straight rod 42; and an ear 44 mounted on the clamping plate 43, wherein the plurality of ears 44 are mounted on the pipe body of the annular pipe 3.

[0054] By arranging the mounting disc 41, the straight rods 42, the clamping plates 43 and the ears 44, the mounting disc 41 is rotatably mounted on the front of the center column 2 as a base support, the plurality of straight rods 42 arranged in a ring shape at equal intervals extend from the outer wall of the mounting disc 41, and the clamping plates 43 are bolted to the ears 44 on the pipe body of the annular pipe 3, thereby forming a multi-point uniform stress fixing structure to lock the annular pipe 3 on the center column 2 and prevent the annular pipe 3 from shaking due to pressure fluctuations during fuel delivery.

[0055] Please refer to Figures 7-9 and Figure 11 , the inner cavity of the test cylinder 64 is provided with a stepped ring groove 65, the stepped ring groove 65 includes a first ring groove 651 near the opening and a second ring groove 652 near the tail, and an inner ring deep groove 653 located on the rear side of the ring wall of the first ring groove 651; an inner inclined ring 67 is mounted on the front ring wall of the first ring groove 651; a plurality of abutting columns 68 are arranged at equal intervals on the rear of the inner inclined ring 67, and the rear ends of the abutting columns 68 abut against the front outer periphery of the circular ring disc 66; and a one-way conducting oil collecting cylinder 69 is mounted on the middle rear side of the bottom end of the test cylinder 64.

[0056] The step formed by the first ring groove 651 and the second ring groove 652 facilitates the placement of the circular ring disc 66 which is detachably mounted. Secondly, when the test oil jet direction deviates, the splashed fuel will be blocked in front of the plate surface of the circular ring disc 66 after impacting the plate surface of the circular ring disc 66, and will flow into the inner ring deep groove 653 for collection. However, due to the large impact pressure of the jet, the splashed fuel may be splashed outward again due to the counter-impact of the plate surface of the circular ring disc 66, and cannot be completely collected and dropped in the inner ring deep groove 653. Therefore, the inner inclined ring 67 is mounted on the front of the stepped ring groove 65, and the inclined structure can guide the oil to flow into the inner ring deep groove 653, so that the splashed fuel can flow more concentratedly to the collection area of the test splashing assembly 7, thereby improving the capture efficiency of the test splashing assembly 7 on abnormal fuel and reducing the risk of missed detection due to fuel diffusion. At the same time, the abutting columns 68 arranged at equal intervals on the rear of the inner inclined ring 67 can further stabilize the circular ring disc 66 and prevent the risk of falling during the upward inclination of the test cylinder 64.

[0057] Secondly, the inner ring deep groove 653 has an inner recess shape, which can better enable the splashed oil or oil impacted by the plate surface of the circular ring disc 66 to flow into the connected oil leakage pipe 73 and the collection cylinder 71.

[0058] Please refer to Figure 8The rear of the circular disc 66 is provided with a semicircular strip 661 embedded in a semicircular groove 662, the semicircular groove 662 is arranged on the stepped surface between the first ring groove 651 and the second ring groove 652, and the circular disc 66 is made of an oil-repellent material. By arranging the semicircular strip 661 and the semicircular groove 662, the semicircular strip 661 is embedded in the semicircular groove 662, which provides a precise positioning reference for the circular disc 66, avoids the deviation of the circular disc 66 from affecting the accuracy of the judgment of the spraying direction, and prevents the shaking of the fuel injection impact. In addition, it is also convenient for quick disassembly and assembly. The circular disc 66 is made of an oil-repellent material, which effectively optimizes the interaction between the fuel and the wall. The oil-repellent property makes the fuel sprayed on the wall not easy to adhere, and can quickly drip along the wall, reducing the residual amount of fuel on the wall.

[0059] Please refer to Figure 5 and Figure 6 One side of the frame groove 61 is provided with a rotary air cylinder 610, and the output end of the rotary air cylinder 610 is fixedly connected with one side column body of the double-column locking plate 62. The top end of the double-column locking plate 62 is provided with a digital angle instrument 611. By arranging the rotary air cylinder 610 and the digital angle instrument 611, the rotary air cylinder 610 drives the double-column locking plate 62 to stably rotate, and more accurate angle adjustment is performed. The digital angle instrument 611 can display the current rotation angle of the double-column locking plate 62 in real time, and intuitively present the angle value, avoiding visual errors of manual reading.

[0060] Please refer to Figures 7-9 The rear end of the test cylinder 64 is provided with a laser emitter 612, and the emission direction of the laser emitter 612 is coaxial with the center axis of the test cylinder 64. By arranging the laser emitter 612, the laser beam can be accurately projected along the center axis of the test cylinder 64, and the actual axis position of the test cylinder 64 can be intuitively reflected. In cooperation with the flexible branch pipe 32 nozzle (the nozzle is wrapped with a self-centering point cover, which is taken out during spraying detection, and the main function is to position and adjust the nozzle, which is not shown in the figure) fixed on the double-column locking plate 62, the center of the laser beam and the center of the centering point cover are coaxial, so that the operator can quickly judge the position of the nozzle and adjust the installation.

[0061] Please refer to Figure 3 and Figure 4, the bottom base frame 1 rear is equipped with a driving motor, its output end is fixedly connected with one end of the inner shaft 8 which is rotatably installed in the middle of the center column 2, the other end of the inner shaft 8 is fixedly connected with the rear of the mounting disc 41; the inner shaft 8 is rotatably installed in the middle of the center column 2, by setting the driving motor and the inner shaft 8, the inner shaft 8 is rotated by the driving motor, the mounting disc 41 is rotated by the inner shaft 8, so that the annular pipe 3 fixed on the mounting disc 41 is rotated, the jet direction detection of the annular pipe 3 is replaced by other flexible branch pipe 32 nozzle.

[0062] Please refer to Figures 1-3 , the front outer side of the assembly ring plate 5 is equidistantly ring-mounted with a plurality of pipe plug blocks 9, one of the pipe plug blocks 9 is replaced by the frame slot 61, by setting the pipe plug block 9, when a single nozzle is tested, the nozzles of the remaining branch pipes can be quickly sealed by inserting the pipe plug block 9, which can avoid fuel leakage to interfere with the test environment, prevent pressure fluctuation in the untested branch pipe due to fuel retention, ensure the stability of the fuel injection pressure of the current test nozzle, and ensure the accuracy of the test data.

[0063] Please refer to Figures 8-10 , the test splash assembly 7 comprises: a collecting cylinder 71 located at the lower front end of the test cylinder 64, and the collecting cylinder 71 is connected with the front end of the oil collection cylinder 69 through a one-way valve pipe 72; an oil leakage pipe 73, one end of which is connected with the bottom of the inner ring deep groove 653 in the test cylinder 64, and the other end is connected with 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 formed in the bottom wall of the collecting cylinder 71, which is located directly below the arched elastic diaphragm 74, and a static terminal 76 is installed on the bottom wall of the inner cavity column hole 75; an insulated push rod 77 is slidably arranged in the inner cavity column hole 75, the top of the insulated push rod 77 is connected with the bottom of the arched elastic diaphragm 74, a dynamic terminal 78 is installed on the bottom of the insulated push rod 77, and the bottom of the insulated push rod 77 is connected with 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, which is triggered when the dynamic terminal 78 contacts the static terminal 76; a protrusion 710 is fixed to the rear outer wall of the insulated push rod 77; a touch pressure body 711 is installed on the rear inner wall of the inner cavity column hole 75; when the protrusion 710 moves downward with the insulated push rod 77, the touch pressure body 711 is pressed to open the one-way valve pipe 72.

[0064] 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 press the inner recess of the arched elastic diaphragm 74, which will drive the insulated push rod 77 to move downward, and the dynamic terminal 78 at the bottom of the insulated push rod 77 will contact the static terminal 76 on the bottom wall of the inner cavity column hole 75, triggering the alarm 79 to emit a buzzing alarm, which will timely prompt the operator that the jet direction has extremely serious abnormal situation, otherwise, if the oil does not reach the detection threshold liquid volume, the arched elastic diaphragm 74 will not be affected by the liquid pressure;

[0065] It should be noted that the arched elastic diaphragm 74 will be concave under the pressure of the oil entering the bottom of the gathering cylinder 71. The pressure it withstands can be adjusted by replacing the arched elastic diaphragm 74 with different stiffness;

[0066] Synchronously, the downward movement of the insulating push rod 77 drives the protrusion 710 connected thereto to extrude the touch body 711, which triggers the electrically controlled one-way valve pipe 72 connected to the touch body 711 to be temporarily opened (the opening time can be set), at this time, the rotary cylinder 610 can assist the rotation by a certain angle, so that the test cylinder 64 and the gathering cylinder 71 are inclined, and the oil in the gathering cylinder 71 is rapidly discharged into the oil collection cylinder 69 to be collected and discharged, which not only avoids the accumulation of oil affecting the subsequent test, but also realizes the response of the alarm and oil discharge, improves the continuity of the test, and at the same time, the weak spring provides a small upward force for the arched elastic diaphragm 74, which facilitates the arched elastic diaphragm 74 to restore to its original state, and does not affect the concave detection of the arched elastic diaphragm 74.

[0067] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An apparatus for engine fuel manifold injection direction test, comprising a base frame (1), a center column (2) mounted on the base frame (1), and an annular tube (3) located at the periphery of the center column (2), characterized in that, a plurality of flexible branch pipes (32) are annularly distributed at the rear of the annular tube (3); a locking assembly (4) is rotatably mounted on the center column (2) and used to support and fix the annular tube (3) and adjust the rotation of the annular tube (3); an assembly ring plate (5) is mounted at the rear of the center column (2); a direction finding assembly (6) is mounted on the assembly ring plate (5) and used to fix the nozzle of the flexible branch pipe (32) to be tested and adjust the test direction synchronously with the direction of the nozzle; the direction finding assembly (6) comprises a frame slot (61) formed in the assembly ring plate (5), a double-column locking plate (62) rotatably mounted in the frame slot (61) and having a middle part used to fix the end nozzle of the flexible branch pipe (32), a pair of parallel arm plates (63) mounted on the two side columns of the double-column locking plate (62), and a test cylinder (64) mounted between the two parallel arm plates (63) and having a circular ring disc (66) detachably mounted in the test cylinder (64); the double-column locking plate (62) and the test cylinder (64) are arranged on the same central axis; a one-way oil collecting cylinder (69) is mounted at the bottom middle rear side of the test cylinder (64); a splash finding assembly (7) is mounted on the direction finding assembly (6) and used to collect the test fuel deviated by the injection and detect and alarm; the splash finding assembly (7) comprises a collecting cylinder (71) located at the lower front end of the test cylinder (64) and connected in communication with the front end of the oil collecting cylinder (69) through a one-way valve pipe (72), and an oil leakage pipe (73) connected in communication at one end with the bottom of an inner ring deep groove (653) located in the test cylinder (64) and at the other end with the top of the collecting cylinder (71); the apparatus adopts a double judgment mechanism combining the splash finding assembly (7) and the oil collecting cylinder (69).

2. An apparatus for testing the orientation of fuel injection in an engine fuel rail as defined in claim 1, wherein, the locking assembly (4) comprises: a mounting disc (41) rotatably mounted at the front of the center column (2); a plurality of straight rods (42) are equidistantly annularly mounted on the outer wall of the mounting disc (41); the end of each straight rod (42) is provided with a clamping plate (43), the clamping plate (43) is provided with an ear (44), and a plurality of the ears (44) are mounted on the pipe of the annular tube (3).

3. An apparatus for testing the orientation of fuel injection in an engine fuel rail as defined in claim 1, wherein, the inner cavity of the test cylinder (64) is provided with a stepped ring groove (65), the stepped ring groove (65) comprises a first ring groove (651) close to the opening and a second ring groove (652) close to the tail, and an inner ring deep groove (653) located at the rear side of the ring wall of the first ring groove (651); an inner inclined ring (67) is mounted on the front ring wall of the first ring groove (651), a plurality of abutting columns (68) are equidistantly annularly mounted at the rear of the inner inclined ring (67), and the rear end of each abutting column (68) abuts against the front outer periphery of the circular ring disc (66).

4. An apparatus for testing the orientation of fuel injectors in the fuel rail of an engine as recited in claim 1, wherein, The rear of the circular ring disc (66) is provided with a semicircular ring strip (661) which is embedded in a semicircular ring groove (662) which is arranged on a step surface between the first ring groove (651) and the second ring groove (652), and the circular ring disc (66) is made of an oil-repellent material.

5. An apparatus for testing the orientation of fuel injectors in the fuel rail of an engine as recited in claim 1, wherein, One side of the frame groove (61) is provided with a rotary air cylinder (610), and an output end of the rotary air cylinder (610) is fixedly connected with one side column body of the double-column locking plate (62). The top end of the double-column locking plate (62) is provided with a digital angle gauge (611).

6. An apparatus for testing the orientation of fuel injectors in the fuel rail of an engine as recited in claim 1, wherein, The rear end of the test cylinder (64) is provided with a laser emitter (612), and the emission direction of the laser emitter (612) is coaxial with the central axis of the test cylinder (64).

7. An apparatus for testing the orientation of fuel injection in an engine fuel rail as defined in claim 1, wherein, The rear of the bottom base frame (1) is provided with a driving motor, an output end of which is fixedly connected with one end of an embedded shaft (8) which is rotatably arranged in the middle part of the central column (2), and the other end of the embedded shaft (8) is fixedly connected with the rear of the mounting disc (41).

8. An apparatus for testing the orientation of fuel injectors in the fuel rail of an engine as recited in claim 1, wherein, The front outer side of the assembly ring plate (5) is provided with a plurality of pipe plug blocks (9) which are arranged at equal intervals in a ring shape, and one of the pipe plug blocks (9) is replaced by the frame groove (61).

9. An apparatus for testing the orientation of fuel injectors in the fuel rail of an engine as recited in claim 1, wherein, The sputtering measurement assembly (7) further comprises: An arched elastic diaphragm (74) is arranged on the bottom wall of the gathering cylinder (71); An inner cavity column hole (75) is arranged at the bottom wall of the gathering cylinder (71) and is located directly below the arched elastic diaphragm (74), and a static terminal (76) is arranged at the bottom wall of the inner cavity column hole (75); An insulating push rod (77) is slidably arranged in the inner cavity column hole (75), the top of the insulating push rod (77) is connected with the bottom of the arched elastic diaphragm (74), a dynamic terminal (78) is arranged at the bottom of the insulating push rod (77), and the bottom of the insulating push rod (77) is connected with the bottom wall of the inner cavity column hole (75) through a weak force spring; An alarm (79) is arranged at the bottom of the gathering cylinder (71) and is triggered when the dynamic terminal (78) contacts the static terminal (76); A protruding block (710) is fixedly arranged at the rear outer wall of the insulating push rod (77); A touch pressure body (711) is arranged at the rear inner wall of the inner cavity column hole (75); and When the protruding block (710) moves downward with the insulating push rod (77), the protruding block (710) extrudes the touch pressure body (711) to open the one-way valve pipe (72).

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