Oil injection ring flow consistency test system and test method

Abstract

This invention relates to a fuel injection ring flow consistency testing system and method, belonging to the field of engine component testing technology. The fuel injection ring flow consistency testing system includes a fuel supply regulating unit, a timing control unit, and a fuel collection unit. The fuel supply regulating unit supplies fuel to the fuel inlet of the fuel injection ring; the timing control unit includes a control valve and a timing controller. The control valve connects or disconnects the fuel supply regulating unit and the fuel injection ring; the timing controller is configured to set a preset duration and start timing when the control valve is opened, and stop timing when the control valve is closed. The fuel collection unit includes multiple fuel collection components. The fuel injection ring flow consistency testing system of this application connects or disconnects the fuel supply regulating unit and the fuel injection ring via a control valve, and controls the connection duration of both via a timing controller, ensuring that the fuel supply duration is strictly consistent across tests, thereby improving the repeatability and reliability of multiple fuel injection ring flow consistency test results.

Description

Technical Field

[0001] This invention relates to the field of engine component testing technology, and in particular to a fuel injection ring flow consistency testing system and method. Background Technology

[0002] Micro-engines offer advantages such as compact structure and wide adaptability to various operating conditions, making them suitable for applications in small-scale power generation, hybrid power transportation systems, and unmanned aerial vehicle (UAV) propulsion systems. In the fuel system of a micro-engine, the injection ring has multiple injection needles circumferentially, through which fuel flowing into the ring is ejected. The consistency of flow rate across all injection needles in the injection ring is fundamental to ensuring uniform fuel distribution within the combustion chamber; therefore, testing the consistency of flow rate across all injection needles in the injection ring is necessary.

[0003] In related technologies, when testing the consistency of flow rate of each injection needle in the injection ring, multiple measuring cups are usually used to collect the oil flowing out of each injection needle. During the test, a stopwatch is manually operated to keep track of the time. After the time is completed, the oil in each measuring cup is weighed, and the mass of the oil is divided by the time duration to obtain the average mass flow rate of each injection needle.

[0004] However, the start and stop of fuel supply and the start and stop of timing both rely on manual operation. Due to the difference in the reaction time of the operators, it is difficult to strictly align the timing start time with the actual start time of fuel supply and the timing end time with the actual stop time of fuel supply in each test. Therefore, the actual effective measurement time of each test is inconsistent, resulting in poor repeatability and reference value of the fuel injection ring test results. Summary of the Invention

[0005] One objective of this invention is to provide a fuel injection ring flow consistency testing system and method to solve the technical problem that the start-up and stop of fuel supply and the timing start-up and stop both rely on manual operation, resulting in poor repeatability and reliability of fuel injection ring test results. A second objective is to provide a fuel injection ring flow consistency testing method.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, embodiments of this application provide a fuel injection ring flow consistency testing system, comprising:

[0008] A fuel supply regulating unit is used to supply fuel to the fuel inlet of the fuel injection ring;

[0009] A timing control unit includes a control valve and a timing controller. The control valve is used to connect or disconnect the fuel supply regulating unit and the fuel injection ring. The timing controller is electrically connected to the control valve and is configured to set a preset duration, start timing when the control valve is opened, and stop timing when the control valve is closed.

[0010] The oil collection unit includes multiple oil collecting components, which are arranged one-to-one with multiple injection needles on the injection ring. The oil collecting components are used to collect the oil flowing out of the injection needles.

[0011] Based on the aforementioned technical methods, the timing control unit is connected between the fuel supply regulating unit and the fuel injection ring inlet. The opening and closing actions of the control valve in the timing control unit are strictly synchronized with the timing start and stop times of the timing controller. This ensures that the fuel supply start and stop times are completely consistent with the timing start and stop times, thereby eliminating errors caused by differences in reaction time during manual operation. This also ensures that the control valve opening duration is strictly consistent in each test, thus improving the repeatability and reliability of the fuel injection ring flow consistency test results.

[0012] In one possible implementation, the oil supply regulating unit includes a main pipeline, a flow detection element, and a flow regulating element. The inlet of the main pipeline is used to receive oil from an external oil storage unit, and the outlet of the main pipeline is connected to the control valve.

[0013] Both the flow detection element and the flow regulating element are connected to the main pipeline and located between the inlet of the main pipeline and the control valve. The flow detection element is used to detect the flow rate of the oil, and the flow regulating element is used to regulate the flow rate of the oil.

[0014] Based on the above technical means, the setting of flow detection components and flow regulation components is conducive to regulating the flow rate of the oil, thereby meeting the testing requirements and improving the stability of the oil during the test.

[0015] In one possible implementation, the oil supply regulating unit further includes a return oil branch and a return oil valve. The inlet of the return oil branch is connected to the main pipeline. The inlet of the return oil branch is located between the flow regulating element and the inlet of the main pipeline. The outlet of the return oil branch is used to connect to the external oil storage unit. The return oil valve is connected to the return oil branch and is used to connect or disconnect the return oil branch.

[0016] And / or, the oil supply regulating unit further includes at least one of a filter element and a drive pump, the filter element being connected to the main pipeline and located between the flow detection element and the inlet of the main pipeline for filtering oil; the drive pump being connected to the inlet end of the main pipeline for driving oil from the external oil reservoir into the main pipeline.

[0017] Based on the aforementioned technical means, the design of the return oil branch and return oil valve helps reduce air bubbles in the oil flowing towards the control valve, thereby improving the stability of oil flow and testing accuracy. The filter element effectively removes impurities from the oil, improving its cleanliness, and facilitates oil flow by driving the pump.

[0018] In one possible implementation, a mounting base is further included, wherein the mounting base is provided with a first mounting portion and a second mounting portion, the first mounting portion being detachably connected to the oil injection ring, and the second mounting portion being located below the first mounting portion and being detachably connected to a plurality of the oil collecting components.

[0019] Based on the above technical means, by setting up a first mounting part and a second mounting part, both the fuel injection ring and the fuel collection component are installed on the mounting base in a detachable connection manner. When the number, diameter or arrangement of the fuel injection needles of the fuel injection ring changes, the corresponding fuel injection ring or fuel collection component can be quickly replaced without rebuilding the entire system. This helps to improve the adaptability of the testing system to fuel injection rings of different specifications and the testing efficiency.

[0020] In one possible implementation, the mounting base includes a first base body and a second base body, the second base body being detachably connected to the first base body;

[0021] The first mounting part is disposed on the second base body, and the first mounting part has a plurality of first mounting positions in the circumferential direction, and a plurality of positioning members in the circumferential direction of the oil injection ring are selectively connected to the first mounting positions; and / or, the second mounting part is disposed on the first base body, and the second mounting part has a plurality of second mounting positions in the circumferential direction, and a plurality of oil collecting members are selectively connected to the second mounting positions.

[0022] Based on the aforementioned technical means, the first and second mounting bodies are detachably connected, facilitating separate manufacturing and independent repair and replacement, which helps reduce the manufacturing and maintenance costs of the mounting base. The layered layout of the first mounting part on the second mounting body and the second mounting part on the first mounting body corresponds to the arrangement of the fuel injection ring on top and the oil collection component on the bottom, allowing the oil to flow naturally into the corresponding oil collection component under gravity. Disassembling the second mounting body allows the fuel injection ring to be separated from the oil collection component, facilitating cleaning and rearrangement.

[0023] In one possible implementation, the first mounting portion includes a plug-in platform disposed on the first base body, and the first mounting position includes teeth disposed on the outer peripheral surface of the plug-in platform, the teeth extending axially along the plug-in platform, and a plurality of positioning members selectively inserted into the plug-in platform and abutting against the plurality of teeth.

[0024] Based on the aforementioned technical means, the fuel injection ring is inserted into the insertion platform via a positioning component, simplifying the assembly operation of the fuel injection ring on the insertion platform and eliminating the need for additional fasteners. The teeth circumferentially restrict the rotational displacement of the positioning component, providing reliable circumferential positioning for the fuel injection ring and ensuring a stable alignment between each fuel injection needle and the lower fuel collection component.

[0025] In one possible implementation, the insertion platform is provided with a radially protruding first limiting portion located below the plurality of teeth. The first limiting portion is used to abut against the positioning member to limit the displacement of the positioning member toward the second seat.

[0026] According to the above technical means, the first limiting part supports the positioning component from below, providing reliable axial positioning for the injection ring, preventing the injection ring from sliding downwards, and ensuring that the axial distance between each injection needle and the lower oil collection component remains stable.

[0027] In one possible implementation, the second mounting part includes a plug groove provided on the second base body, the plug groove being arranged circumferentially along the second base body, and a plurality of plug positions in the plug groove constituting a plurality of second mounting positions, wherein the bottoms of the plurality of oil collecting components are selectively inserted into the corresponding second mounting positions.

[0028] According to the above technical means, the insertion slot is set along the circumference of the second seat, which is conducive to forming multiple insertion positions continuously distributed along the circumference. The bottom of the oil collecting part can be inserted at any circumferential position of the insertion slot, which is conducive to improving the flexibility of oil collecting part position adjustment.

[0029] In one possible implementation, at least one of the inner and outer circumferential surfaces of the insertion groove is provided with a plurality of first arc-shaped grooves, the plurality of first arc-shaped grooves being arranged sequentially along the circumference of the insertion groove, and the connection between two adjacent first arc-shaped grooves abutting against the oil collecting member to limit the displacement of the oil collecting member along the circumference of the insertion groove.

[0030] According to the above technical means, the bottom of the oil collecting component is provided with multiple points of contact through the connection of two adjacent first arc-shaped grooves, and the oil collecting component is restricted from different positions in the circumference to form a multi-point coordinated limit, which is conducive to improving the reliability and stability of the limit.

[0031] In one possible implementation, the oil collecting element includes a cylinder and a base connected to the bottom end of the cylinder. The base protrudes radially outward relative to the cylinder and is inserted into the insertion slot. A plurality of the bases are arranged staggered vertically along the circumference of the insertion slot, and adjacent bases are partially stacked in the height direction.

[0032] Based on the aforementioned technical means, the cylinder in the oil collecting component is used to collect oil, and the base is inserted into the insertion slot, which helps to improve the stability of the insertion. Multiple bases are arranged in a staggered, vertically arranged sequence around the insertion slot, with adjacent bases partially overlapping in the vertical direction. This allows for accommodating more oil collecting components within the limited space of the insertion slot, resulting in a more compact overall arrangement of the oil collecting components.

[0033] In one possible implementation, a limiting member connected to the mounting base is further included. The limiting member has a second limiting portion extending circumferentially along the limiting member. The second limiting portion is located between the first mounting portion and the second mounting portion to allow the plurality of oil collecting members to pass through. The second limiting portion is used to limit the displacement of the oil collecting members radially along the limiting member.

[0034] According to the above technical means, the second limiting part is located between the first mounting part and the second mounting part, and provides radial constraint on the middle or upper part of the oil collecting part, forming an upper and lower matching support with the insertion groove, which effectively prevents the oil collecting part from tilting or shaking during the test, and helps to ensure the alignment relationship between the oil collecting part and the injection needle during the test.

[0035] In one possible implementation, the second limiting part is at least two limiting holes spaced apart along the circumference of the limiting member. At least one of the inner and outer circumferential surfaces of the limiting holes is provided with a plurality of second arc-shaped grooves. The plurality of second arc-shaped grooves are arranged sequentially along the circumference of the limiting member. The connection between two adjacent second arc-shaped grooves abuts against the oil collecting member to limit the displacement of the oil collecting member along the circumference of the limiting holes.

[0036] And / or, the limiting member is inserted into the mounting base, the limiting member is provided with a third limiting part, the mounting base is provided with a limiting mating part, and the third limiting part is inserted into the limiting mating part to limit the displacement of the limiting member along the circumferential direction of the mounting base.

[0037] Based on the above technical means, the oil collecting component can be selected to cooperate with the second arc-shaped groove group at different positions, adapt to different oil injection needle layouts, and has good versatility.

[0038] Secondly, embodiments of this application provide a method for testing the consistency of injection ring flow rate, applied to the injection ring flow rate consistency testing system described in any of the above embodiments, comprising:

[0039] When the control valve connects the fuel supply regulating unit and the fuel injection ring, the timing controller starts timing, the fuel supply regulating unit supplies fuel to the fuel injection ring, and multiple oil collecting components collect the fuel flowing out of the multiple injection needles of the fuel injection ring; when the fuel supply regulating unit and the fuel injection ring have been connected for a preset time, the timing controller stops timing at the same time as the control valve controls the fuel supply regulating unit and the fuel injection ring to disconnect.

[0040] Based on the above technical means, it is beneficial to improve the repeatability and reference value of the fuel injection ring flow consistency test results.

[0041] The beneficial effects of this invention are:

[0042] The present invention relates to a fuel injection ring flow consistency testing system and method. The fuel injection ring flow consistency testing system connects or disconnects the fuel supply regulating unit and the fuel injection ring by a timing control unit and controls the connection duration of the two to ensure that the fuel supply duration of each test is strictly consistent, thereby improving the repeatability and reference value of the fuel injection ring flow consistency test results. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 This is a schematic diagram of the structure of the fuel injection ring flow consistency testing system in an embodiment of the present invention;

[0045] Figure 2 for Figure 1 Schematic diagram of the structure of the central injection ring;

[0046] Figure 3 for Figure 1 A schematic diagram of the structure in which the mounting base and limiting components work together to fix the fuel injection ring and multiple fuel collection components;

[0047] Figure 4 for Figure 3 Top view;

[0048] Figure 5 for Figure 4 Sectional view along direction AA in the middle;

[0049] Figure 6 for Figure 3 A schematic diagram of the structure in which the central injection ring is installed on the first base;

[0050] Figure 7 for Figure 3 A schematic diagram of the structure of the first seat in the middle;

[0051] Figure 8 for Figure 3Schematic diagram of the structure of the second seat in the middle;

[0052] Figure 9 for Figure 8 Top view of the second seat in the middle;

[0053] Figure 10 for Figure 3 A schematic diagram of the structure hidden behind the second seat;

[0054] Figure 11 for Figure 3 Schematic diagram of the middle limiting component;

[0055] Figure 12 for Figure 11 Top view of the middle limiting component;

[0056] Figure 13 This is a flowchart of the fuel injection ring flow consistency test method in this invention;

[0057] Figure 14 This is a detailed flowchart of the fuel injection ring flow consistency test method in this invention.

[0058] Explanation of reference numerals in the attached figures:

[0059] 100-Fuel supply regulating unit; 110-Main pipeline; 120-Flow detection element; 130-Flow regulating element; 140-Return oil branch; 150-Return oil valve; 160-Filter element; 170-Drive pump; 180-Oil tank;

[0060] 200 - Injection ring; 210 - Injection needle; 220 - Inlet pipe; 230 - Positioning component;

[0061] 300 - Timing control unit; 310 - Control valve; 320 - Timing controller;

[0062] 400 - Oil collecting component; 410 - Cylinder body; 420 - Base;

[0063] 500 - Mounting base; 510 - First base body; 511 - First mounting part; 5111 - Plug-in platform; 5112 - First mounting position; 512 - First limiting part; 513 - First connecting body; 514 - First plug-in protrusion; 520 - Second base body; 521 - Second mounting part; 522 - Limiting mating part; 523 - Mounting platform; 524 - First arc-shaped groove; 525 - Second connecting body; 526 - First plug-in groove;

[0064] 600 - Limiting component; 610 - Second limiting part; 611 - Second arc-shaped groove; 612 - Mounting hole; 613 - Third limiting part;

[0065] 700 - Connecting pipes;

[0066] 800 - Weighing unit.

[0067] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0068] In the fuel system of a micro-turbine engine, the injection ring has multiple injection needles circumferentially. Fuel flowing into the injection ring is ejected through these needles to achieve multi-point fuel supply. The consistency of flow rate among the injection needles in the injection ring is a fundamental condition for determining the uniformity of fuel distribution within the combustion chamber. Therefore, it is necessary to test the consistency of flow rate among the injection needles in the injection ring.

[0069] In related technologies, when testing the consistency of flow rate of each injection needle in the injection ring, multiple measuring cups are usually used to collect the oil flowing out of each injection needle. During the test, a stopwatch is manually operated to keep track of the time. After the time is completed, the oil in each measuring cup is weighed, and the mass of the oil is divided by the time duration to obtain the average mass flow rate of each injection needle.

[0070] However, the start and stop of fuel supply and the start and stop of timing both rely on manual operation. Due to the difference in the reaction time of the operators, it is difficult to strictly align the timing start time with the actual start time of fuel supply and the timing end time with the actual stop time of fuel supply in each test. Therefore, the actual effective measurement time of each test is inconsistent, resulting in poor repeatability and reference value of the fuel injection ring test results.

[0071] Based on this, this application proposes a fuel injection ring flow consistency testing system and method to solve the technical problem that the start-up and stop of fuel supply and the timing start-up and stop both rely on manual operation, resulting in poor repeatability and reference value of multiple fuel injection ring test results. The structure of the fuel injection ring flow consistency testing system is described below with reference to the accompanying drawings.

[0072] like Figure 1 As shown, the fuel injection ring flow consistency testing system in this embodiment includes a fuel supply regulating unit 100, a timing control unit 300, and a fuel collection unit. The fuel supply regulating unit 100 supplies fuel to the fuel inlet of the fuel injection ring 200. The timing control unit 300 includes a control valve 310 and a timing controller 320. The control valve 310 connects or disconnects the fuel supply regulating unit 100 and the fuel injection ring 200. The timing controller 320 is electrically connected to the control valve 310 and is configured to set a preset duration, start timing when the control valve 310 is opened, and stop timing when the control valve 310 is closed.

[0073] The oil collection unit includes multiple oil collection components 400, which are arranged one-to-one with multiple injection needles 210 on the injection ring 200. The oil collection components 400 are used to collect the oil flowing out of the injection needles 210 respectively.

[0074] The fuel injection ring flow consistency test system of this application embodiment connects or disconnects the fuel supply regulating unit 100 and the fuel injection ring 200 through the control valve 310 in the timing control unit 300, and controls the connection duration of the two through the timing controller 320. This uniformly limits the effective fuel supply duration of the fuel injection needle 210 in multiple tests, ensuring that the fuel supply duration of each test is strictly consistent. This solves the technical problem of inconsistent test times in multiple tests in manual timing schemes, thereby improving the repeatability and reference value of the fuel injection ring 200 flow consistency test results.

[0075] It should be noted that the flow consistency test of the injection ring 200 refers to measuring the average mass flow rate of each injection needle 210 and evaluating the flow distribution uniformity of the injection ring 200 based on the degree of deviation between the flow rates of each injection needle 210. Its core lies in the accurate measurement of the flow rate of each injection needle 210 and the evaluation of uniformity based on the measurement results. In this embodiment, the timing control unit 300 uniformly establishes an effective metering time window for all injection needles 210, enabling accurate collection and measurement of the fuel output of each injection needle 210 within a unified time boundary. This measurement result forms the basis for the flow consistency evaluation.

[0076] The following is combined first Figure 2 The structure of the injection ring 200 is described below. Multiple injection needles 210 are arranged circumferentially around the injection ring 200 and extend axially along the injection ring 200. One end of each injection needle 210 is connected to the injection ring 200, and the other end of each injection ring 200 is used for fuel outlet. An inlet pipe 220 is connected to the injection ring 200, with an inlet located on the inlet pipe 220. The fuel supply regulating unit 100 is specifically connected to the inlet pipe 220. Fuel in the fuel supply regulating unit 100 flows into the inlet pipe 220 through the control valve 310 in the timing control unit 300. After flowing into the injection ring 200, the fuel in the inlet pipe 220 flows out through the multiple injection needles 210 and is collected by the corresponding fuel collector 400.

[0077] The timing controller 320 drives the control valve 310 to open and close via an electrical signal. The opening and closing actions of the control valve 310 are strictly synchronized with the timing start and stop times of the timing controller 320. For example, the timing controller 320 starts timing when the control valve 310 opens and stops timing when the control valve 310 closes, ensuring that the oil supply start and stop times are completely consistent with the timing start and stop times, thereby eliminating errors caused by differences in reaction time during manual operation. This ensures that the opening duration of the control valve 310 is strictly consistent in each test, which helps to ensure the repeatability of multiple test results.

[0078] Meanwhile, only a single control valve 310 is needed to control the supply or stop of oil supply to the injection ring 200, eliminating the need to set up a control valve 310 on each branch of the injection needle 210. This avoids the problem of inconsistent oil output time in each branch due to differences in the manufacturing precision and response characteristics of each valve in the multi-valve control scheme. As a result, the test system has the advantages of simple structure, low cost and high reliability.

[0079] In practical implementation, the timing controller 320 is used to output a drive signal to open or close the control valve 310. The timing controller 320 has a timing resolution of milliseconds (e.g., 1 ms). A preset duration (i.e., the duration for which the control valve 310 remains open) can be pre-set within the timing controller 320, and this connection duration can be repeatedly triggered to ensure that each test is performed for the same preset duration. In practical implementation, the preset duration can be set according to the test requirements.

[0080] The control valve 310 can be a solenoid valve from the prior art, preferably a high-response normally closed solenoid valve. "Normally closed" means that the valve port is closed when de-energized and opens when energized. This automatically keeps the fuel supply regulating unit 100 and the injection ring 200 disconnected during the test preparation phase, ensuring effective fuel injection only occurs within a preset metering time window. "High response" means that the physical response time of the solenoid valve from receiving an electrical signal to the valve port being fully open or closed is extremely short; for example, a high-response solenoid valve with a response time in the millisecond range (e.g., 1ms) can be selected.

[0081] The control valve 310 in this embodiment adopts the high-response solenoid valve, which can effectively reduce the impact of the physical delay of valve switching on the accuracy of the start and end boundaries of the effective metering time window, so that the deviation between the preset duration of the timing controller 320 and the actual fuel supply on / off duration is controlled within a negligible range, thereby further ensuring the high consistency of the effective metering time window of each fuel injection needle 210 and the repeatability of test results in different rounds.

[0082] In one possible implementation, such as Figure 1As shown, the oil supply regulating unit 100 includes a main pipeline 110, a flow detection element 120, and a flow regulating element 130. The inlet of the main pipeline 110 is used to receive oil from an external oil storage unit, and the outlet of the main pipeline 110 is connected to a control valve 310. Both the flow detection element 120 and the flow regulating element 130 are connected to the main pipeline 110 and are located between the inlet of the main pipeline 110 and the control valve 310. The flow detection element 120 is used to detect the flow rate of the oil, and the flow regulating element 130 is used to regulate the flow rate of the oil.

[0083] Here, along the oil flow path on the main pipeline 110, both the flow detection element 120 and the flow regulating element 130 are located upstream of the control valve 310. They can adjust the flow rate of the oil flowing into the control valve 310 according to testing requirements, thereby meeting the testing needs of the injection ring 200. Furthermore, the flow detection element 120 and the flow regulating element 130 can work together to adjust the oil flow rate into the control valve 310 to multiple testing conditions, allowing for separate testing of the injection ring 200 at different flow rates.

[0084] In addition, when the control valve 310 is opened, the oil in the main pipeline 110 can immediately enter the injection ring 200, ensuring a stable oil supply flow within the effective metering time window. Furthermore, the main pipeline 110 serves as a unified oil supply channel, with all components connected in series, resulting in a clear oil flow direction, a simple system structure, and ease of installation, commissioning, and maintenance.

[0085] In specific implementation, refer to Figure 1 As shown, the flow detection element 120 is located upstream of the flow regulating element 130, and the flow regulating element 130 is located between the flow detection element 120 and the control valve 310. The flow detection element 120 can be a flow meter using existing technology, such as a mass flow meter or a volumetric flow meter, to detect the oil flow rate in the main pipeline 110 in real time, allowing operators to know the oil supply status. The flow regulating element 130 can be a throttle valve or a proportional regulating valve using existing technology, adjusting the oil flow rate in the main pipeline 110 by changing the valve opening to establish and stabilize the preset oil supply conditions.

[0086] The flow regulating component 130 is used in conjunction with the flow detection component 120. The operator or control system can adjust the opening of the flow regulating component 130 according to the feedback signal of the flow detection component 120 until the oil supply flow reaches the preset target value, thereby ensuring the stability and consistency of the oil supply flow of each injection needle 210 of the injection ring 200 within the effective metering time window after the control valve 310 is opened.

[0087] Furthermore, the external oil storage unit in this embodiment can be, for example, a product with an oil storage function such as an oil tank 180. Figure 1As shown, the outlet of the control valve 310 is connected to the inlet of the injection ring 200 through the connecting pipe 700. The connecting pipe 700 here helps to improve the stability of the oil flowing into the injection ring 200.

[0088] In one possible implementation, such as Figure 1 As shown, the oil supply regulating unit 100 also includes a return oil branch 140 and a return oil valve 150. The inlet of the return oil branch 140 is connected to the main pipeline 110. The inlet of the return oil branch 140 is located between the flow regulating element 130 and the inlet of the main pipeline 110. The outlet of the return oil branch 140 is used to connect to an external oil storage unit. The return oil valve 150 is connected to the return oil branch 140 and is used to connect or disconnect the return oil branch 140.

[0089] With this setup, firstly, during the preparation phase of the test, by opening the return valve 150, the oil in the main pipeline 110 can flow back to the oil tank 180 (i.e., the external oil storage section) through the return branch 140 and then flow back into the main pipeline 110. During the circulation process of the oil between the oil tank 180, the main pipeline 110, and the return branch 140, air bubbles in the main pipeline 110 can be carried out, which helps to prevent air bubbles from entering the injection ring 200, thereby improving the flow test accuracy of each injection needle 210.

[0090] Secondly, the oil in the main pipeline 110 flows into the oil tank 180 through the return branch 140, which also has a depressurization effect. This helps to adjust the oil pressure flowing to the control valve 310 to the required state for testing and improves the stability of the oil. Furthermore, the return branch 140 is located upstream of the control valve 310, so the establishment and interruption of the return oil circulation are not affected by the on / off state of the downstream control valve 310. This separates the oil supply preparation and timing functions, ensuring they do not interfere with each other, thereby further improving testing efficiency.

[0091] Specifically, the inlet of the return oil branch 140 is located upstream of the flow detection element 120. The return oil valve 150 can be a ball valve, gate valve, or solenoid valve, as used in the prior art, to connect or disconnect the return oil branch 140. During the test preparation phase, the return oil valve 150 is opened, and the oil circulates between the oil tank 180, the main pipeline 110, and the return oil branch 140 to remove pipeline gas and stabilize the oil supply pressure. During the formal test phase, the return oil valve 150 is closed, and all the oil in the oil supply path flows to the injection ring 200. After the test, the return oil valve 150 is reopened to guide the residual pressure oil in the main pipeline 110 back to the oil tank 180 to depressurize the system.

[0092] In one possible implementation, such as Figure 1As shown, the oil supply regulating unit 100 also includes at least one of a filter element 160 and a drive pump 170. The filter element 160 is connected to the main pipeline 110 and is located between the flow detection element 120 and the inlet of the main pipeline 110, and is used to filter oil. The drive pump 170 is connected to the inlet end of the main pipeline 110 and is used to drive oil from the external oil storage section into the main pipeline 110.

[0093] Here, the filter element 160 filters the oil, effectively removing impurities and particles. The filtered oil flows sequentially through the flow detection element 120, the flow regulating element 130, and the control valve 310 before flowing into the injection ring 200. This improves the protection of components such as the flow detection element 120, the flow regulating element 130, and the control valve 310. The drive pump 170 supplies a stable amount of oil to the injection ring 200, ensuring a stable oil supply flow within the effective metering time window and providing a reliable guarantee for the accurate metering of the oil output from each injection needle 210.

[0094] The oil supply regulating unit 100 in this embodiment further includes an oil tank 180, which is the aforementioned external oil storage section used for storing oil. Figure 1 As shown, the filter element 160 is located between the inlet of the return oil branch 140 and the flow detection element 120, and the drive pump 170 is located between the inlet of the main pipeline 110 and the inlet of the return oil branch 140. With this configuration, during the test preparation phase, the return oil valve 150 is opened, and the drive pump 170 drives the oil into the main pipeline 110. Before reaching the filter element 160, the oil returns to the oil tank 180 via the return oil branch 140, forming a circulation loop that does not include the filter element 160. This achieves circulation venting and pressure stabilization while also helping to extend the service life of the filter element 160.

[0095] During the formal testing phase, the return valve 150 is closed and the control valve 310 is open. The oil output by the drive pump 170 passes through the filter element 160, the flow detection element 120, the flow regulating element 130 and the control valve 310 in sequence before entering the injection ring 200. The filter element 160 is located upstream of the flow detection element 120 to ensure that the oil entering the downstream components is clean, to ensure the accuracy of flow detection and to protect the downstream precision components.

[0096] In specific implementation, the filter element 160 in this embodiment can be an oil filter from the prior art, and its filtration accuracy can be selected according to the nozzle size of the injection ring 200 and the accuracy requirements of the injection needle 210 and the flow detection element 120. The drive pump 170 can be a product such as an electric fuel pump from the prior art.

[0097] In one possible implementation, such as Figure 1 , Figure 3 , Figure 4 and Figure 5 as well as Figure 8 As shown, the fuel injection ring flow consistency test system also includes a mounting base 500. The mounting base 500 is provided with a first mounting part 511 and a second mounting part 521. The first mounting part 511 is used to detachably connect with the fuel injection ring 200. The second mounting part 521 is located below the first mounting part 511 and is used to detachably connect with multiple oil collection parts 400.

[0098] Here, the first mounting part 511 and the second mounting part 521 form a layered layout on the mounting base 500. The oil flowing out of the injection ring 200 falls naturally into the corresponding oil collection component 400 under the action of gravity, without the need for an additional guiding device. The structure is simple and the collection is reliable. Both the injection ring 200 and the oil collection component 400 adopt a detachable connection method. When the number, diameter, or arrangement of the injection needles 210 of the injection ring 200 changes, the corresponding injection ring 200 or oil collection component 400 can be quickly replaced without rebuilding the entire system. This helps to improve the adaptability of the test system to different specifications of injection rings 200 and the testing efficiency. In addition, the mounting base 500 provides a unified installation benchmark for the injection ring 200 and the oil collection component 400. The relative positions of the two on the mounting base 500 are determined by the mounting base 500, ensuring that the one-to-one correspondence between each injection needle 210 and each oil collection component 400 remains consistent in multiple tests, thereby helping to further improve the accuracy and repeatability of the test results.

[0099] In one possible implementation, such as Figure 3 , Figure 5 and Figure 7 and Figure 8 As shown, the mounting base 500 includes a first base body 510 and a second base body 520, with the second base body 520 detachably connected to the first base body 510. A first mounting portion 511 is disposed on the second base body 520, and the first mounting portion 511 has a plurality of first mounting positions 5112 in its circumferential direction. A plurality of positioning members 230 of the oil injection ring 200 in its circumferential direction are selectively connected to the first mounting positions 5112. And / or, a second mounting portion 521 is disposed on the first base body 510, and the second mounting portion 521 has a plurality of second mounting positions in its circumferential direction. A plurality of oil collecting members 400 are selectively connected to the second mounting positions.

[0100] Here, the first mounting body 510 and the second mounting body 520 are detachably connected, which facilitates separate manufacturing and independent maintenance and replacement, and helps to reduce the manufacturing and maintenance costs of the mounting base 500. The upper and lower layered layout of the first mounting part 511 on the second mounting body 520 and the second mounting part 521 on the first mounting body 510 corresponds to the arrangement of the fuel injection ring 200 on top and the oil collection part 400 on the bottom, so that the oil flows naturally into the corresponding oil collection part 400 under the action of gravity. The fuel injection ring 200 and the oil collection part 400 can be separated by disassembling the second mounting body 520, which is convenient for cleaning and rearrangement.

[0101] By providing multiple first mounting positions 5112, the positioning element 230 of the injection ring 200 can selectively connect to the corresponding first mounting position 5112 according to the actual number and circumferential position of the injection needles 210. Similarly, by providing multiple second mounting positions, multiple oil collecting elements 400 can selectively connect to the corresponding second mounting positions according to the actual number and circumferential position of the injection needles 210. When the number or arrangement of the injection needles 210 of the injection ring 200 changes, only the matching relationship between the positioning element 230 and the oil collecting element 400 and the corresponding mounting position needs to be adjusted for quick adaptation, without needing to replace the entire mounting base 500, thus improving the versatility of the testing system.

[0102] In one possible implementation, such as Figure 5 and Figure 6 As shown, the first mounting portion 511 includes a insertion platform 5111 disposed on the first base 510. The first mounting position 5112 includes a plurality of teeth disposed on the outer peripheral surface of the insertion platform 5111, each tooth extending axially along the insertion platform 5111. A plurality of positioning members 230 are selectively inserted into the insertion platform 5111 and abut against the corresponding teeth.

[0103] Here, the fuel injection ring 200 is inserted into the insertion platform 5111 via the positioning member 230, making the assembly operation of the fuel injection ring 200 on the insertion platform 5111 simple and requiring no additional fasteners. After the positioning member 230 abuts against the teeth, the teeth restrict the rotational displacement of the positioning member 230 circumferentially, providing reliable circumferential positioning for the fuel injection ring 200 and ensuring that the alignment relationship between each fuel injection needle 210 and the lower oil collection member 400 remains stable. At the same time, the teeth extend axially along the insertion platform 5111, parallel to the insertion direction of the positioning member 230 on the insertion platform 5111, and also facilitate the installation and removal of the positioning member 230 outside the insertion platform 5111.

[0104] Furthermore, the multiple positioning elements 230 can selectively abut against the teeth at different positions. By adjusting the connection of the positioning elements 230 with different teeth, the positions of the multiple injection needles 210 on the insertion platform 5111 can be adjusted. In addition, the multiple first mounting positions 5112 on the insertion platform 5111 can also accommodate injection rings 200 with different numbers and arrangements of positioning elements 230, thereby improving the installation flexibility of the injection rings 200.

[0105] It should be noted that the positioning component 230 can be... Figure 2 The columnar positioning member 230 shown can have a cross-sectional shape such as circular or rectangular. The cross-sectional shape of the teeth can take various forms, as long as they can abut against the positioning member 230 to restrict the circumferential rotation of the fuel injection ring 200. For example, the cross-section of the teeth can be rectangular, trapezoidal, triangular, or arc-shaped.

[0106] In one possible implementation, such as Figure 6 and Figure 7 As shown, the insertion platform 5111 is provided with a radially outward protruding first limiting part 512. The first limiting part 512 is located below the multiple teeth. The first limiting part 512 is used to abut against the positioning member 230 to limit the displacement of the positioning member 230 toward the second seat 520.

[0107] Here, the first limiting part 512 supports the positioning member 230 from below, providing reliable axial positioning for the fuel injection ring 200, preventing the fuel injection ring 200 from sliding downwards, and ensuring that the axial distance between each fuel injection needle 210 and the lower oil collection member 400 remains stable. In this embodiment, circumferential limiting is achieved by the teeth, and axial limiting is achieved by the first limiting part 512, resulting in higher limiting reliability through the cooperation of the two. During assembly, the operator inserts the fuel injection ring 200 into the insertion platform 5111 and pushes it downwards until the bottom end of each positioning member 230 abuts against the first limiting part 512, thus confirming that the fuel injection ring 200 is installed in place.

[0108] In terms of specific structure, such as Figure 6 and Figure 7 As shown, the first limiting part 512 is a limiting protrusion ring arranged circumferentially along the insertion platform 5111, with the bottom end of each tooth extending to the upper surface of the limiting protrusion. This limiting protrusion ring has a simple structure, is easy to arrange and implement, and provides axial limiting for the positioning member 230 at any position. Alternatively, the first limiting part 512 may include multiple first limiting protrusions, which are arranged at intervals circumferentially along the insertion platform 5111. In this case, the axial positioning of the positioning member 230 can also be achieved through the abutment of the first limiting protrusions against the corresponding positioning member 230.

[0109] In one possible implementation, such as Figure 5 and Figure 8 As shown, the second mounting part 521 includes a plug groove provided on the second base 520. The plug groove is arranged along the circumference of the second base 520. Multiple plug positions in the plug groove constitute multiple second mounting positions. The bottoms of multiple oil collecting parts 400 are selectively inserted into the corresponding second mounting positions.

[0110] Here, the insertion slots are arranged circumferentially along the second base 520, which facilitates the formation of multiple insertion positions continuously distributed circumferentially. The bottom of the oil collecting component 400 can be inserted into any circumferential position of the insertion slot, making the installation position of the oil collecting component 400 flexible. When the number or circumferential angle of the injection needles 210 of the injection ring 200 changes, only the insertion position of each oil collecting component 400 in the insertion slot needs to be adjusted for quick adaptation, without replacing the second base 520, thus exhibiting good versatility. The oil collecting component 400 is installed using a plug-in method; it can be fixed by insertion and disassembled by pulling out, making operation simple and quick. This facilitates rapid disassembly of the oil collecting component 400 for weighing and cleaning after testing, thereby improving testing efficiency.

[0111] In terms of specific structure, such as Figure 5 and Figure 8 As shown, the second base 520 includes a mounting platform 523, and a plug groove is disposed on the upper surface of the mounting platform 523 along the circumference of the mounting platform 523. The plug groove is annular, and the opening of the plug groove faces the first mounting part 511.

[0112] In one possible implementation, such as Figure 8 As shown, at least one of the inner and outer circumferential surfaces of the insertion groove is provided with a plurality of first arc-shaped grooves 524. The plurality of first arc-shaped grooves 524 are arranged sequentially along the circumferential direction of the insertion groove. The connection between two adjacent first arc-shaped grooves 524 abuts against the oil collecting component 400 to limit the displacement of the oil collecting component 400 along the circumferential direction of the insertion groove.

[0113] Here, the connection between two adjacent first arc-shaped grooves 524 forms a limiting ridge. Multiple limiting ridges provide multi-point contact with the bottom of the oil collecting component 400, and together restrict the oil collecting component 400 from different circumferential positions, forming a multi-point collaborative limiting, which improves the reliability and stability of the limiting.

[0114] In terms of specific structure, both the inner and outer circumferential surfaces of the insertion slot are provided with multiple first arc-shaped grooves 524. Due to the multiple first arc-shaped grooves 524, the cross-sections of both the inner and outer circumferential surfaces of the insertion slot are wavy. The first arc-shaped grooves 524 are small in size and numerous, providing a denser circumferential indexing position within the insertion slot of the same circumference. The oil collecting component 400 can be selected to cooperate with multiple first arc-shaped grooves 524 at different positions to circumferentially limit and clamp the oil collecting component 400, improving insertion stability. Alternatively, it is also feasible to provide a first arc-shaped groove on only one of the inner and outer circumferential surfaces of the insertion slot.

[0115] In one possible implementation, such as Figure 10As shown, the oil collecting component 400 includes a cylinder 410 and a base 420 connected to the bottom end of the cylinder 410. The base 420 protrudes radially outward relative to the cylinder 410 and is inserted into the insertion slot. Multiple bases 420 are arranged staggered vertically along the circumference of the insertion slot, and adjacent bases 420 are partially stacked in the height direction.

[0116] Here, the cylinder 410 of the oil collecting component 400 is used to collect oil, and the base 420 is inserted into the insertion slot, which helps to improve the stability of the insertion. Multiple bases 420 are arranged in a staggered manner along the circumference of the insertion slot, with adjacent bases 420 partially overlapping in the height direction. This allows for accommodating more oil collecting components 400 within the limited space of the insertion slot, making the overall arrangement of the oil collecting components 400 more compact.

[0117] In terms of specific structure, such as Figure 10 As shown, the cross-sectional shape of each base 420 is circular, and the cross-sectional area of ​​the base 420 is adapted to the width of the insertion groove. The connection of the multiple first arc-shaped grooves 524 abuts against the outer peripheral surface of the base 420, thereby restricting the displacement of the base 420 along the circumferential direction of the insertion groove.

[0118] It should be noted that in the embodiments of this application, the bases 420 of the multiple oil collecting components 400 are arranged in a staggered manner along the circumference of the insertion groove. This means that the height positions of two adjacent bases 420 in the insertion groove are different, one is relatively high and the other is relatively low. Therefore, the multiple bases 420 form an alternating arrangement of high and low along the circumference of the insertion groove.

[0119] Based on the alternating arrangement of multiple bases 420 at varying heights, adjacent bases 420 are partially stacked vertically in the height direction. Specifically, the bottom of the lower base 420 (hereinafter referred to as the first base) abuts against the bottom of the insertion slot, and the first base is directly supported by the bottom of the slot. The two bases 420 adjacent to the first base (hereinafter referred to as the second bases) are at higher positions, with part of the bottom surface of the second base overlapping the upper surface of the first base, supported by the upper surface of the first base, while the other part of the bottom surface of the second base is supported by the first base on the other side. Thus, the first base and the second base partially overlap in the height direction. In this embodiment, the circumferential projections of adjacent bases 420 partially coincide, allowing more oil collection components 400 to be accommodated within the limited circumferential space of the insertion slot. This makes the arrangement of the oil collection components 400 more compact, especially suitable for testing scenarios with a large number of injection needles 210 and injection rings 200.

[0120] In addition, to achieve the connection between the first seat 510 and the second seat 520, such as Figure 5 , Figure 6 and Figure 7 and Figure 8As shown, the first base 510 further includes a first connector 513 connected to the bottom of the insertion platform 5111, and the second base 520 further includes a second connector 525 connected to the top of the mounting platform 523. The first connector 513 and the second connector 525 are detachably connected.

[0121] In one possible implementation, the first connector 513 and the second connector 525 are plugged into each other. This plug-in connection method is simple and facilitates the connection and disassembly of the first base 510 and the second base 520. As a structural example, such as... Figure 5 , Figure 6 , Figure 7 as well as Figure 8 As shown, a plurality of first insertion protrusions 514 are provided at intervals on the bottom end face of the first connector 513, and a plurality of first insertion slots 526 are provided on the top end face of the second connector 525. The connection between the first seat 510 and the second seat 520 can be realized by inserting the first insertion protrusions 514 into the corresponding first insertion slots 526, and the first seat 510 and the second seat 520 cannot rotate relative to each other.

[0122] The design of the first insertion protrusion 514 and the first insertion groove 526 is simple and easy to form, resulting in a good insertion effect. Alternatively, the first insertion protrusion 514 can also be located on the second connector 525, in which case the first insertion groove 526 is located on the first connector 513. The number and cross-sectional shape of the first insertion protrusions 514 can be determined according to usage requirements. Furthermore, the cross-sectional area of ​​the second connector 525 can be larger than that of the first connector 513, which helps improve the support stability of the second connector 525 on the first connector 513.

[0123] In this embodiment of the application, the oil collecting component 400 is usually a slender cylindrical body 410 structure. When only the bottom is inserted, the upper part of the oil collecting component 400 is in a suspended state. During the test, it may tilt radially or shake due to vibration or the impact of falling oil.

[0124] Based on this, in one possible implementation, such as Figure 3 , Figure 4 and Figure 5 As shown, the fuel injection ring flow consistency test system also includes a limiting member 600 connected to the mounting base 500. The limiting member 600 is provided with a second limiting part 610 extending circumferentially along the limiting member 600. The second limiting part 610 is located between the first mounting part 511 and the second mounting part 521 so that multiple oil collecting parts 400 can pass through. The second limiting part 610 is used to limit the displacement of the oil collecting parts 400 along the radial direction of the limiting member 600.

[0125] Here, the second limiting part 610 is located between the first mounting part 511 and the second mounting part 521, providing radial constraint on the middle or upper part of the oil collecting part 400. It forms an upper and lower support with the insertion slot, effectively preventing the oil collecting part 400 from tilting or shaking during testing, ensuring the alignment of the oil collecting part 400 and the injection needle 210 during testing. This allows the second limiting part 610 to extend circumferentially, enabling the oil collecting part 400 to be inserted at any position within the second limiting part 610 according to the circumferential position of the injection needle 210, thus adapting to different injection needle 210 layouts and exhibiting good versatility. Furthermore, the second limiting part 610, the first mounting part 511, and the second mounting part 521 are arranged in layers in the height direction. The three parts are functionally independent and do not interfere with each other, resulting in a clear overall structure that facilitates assembly, disassembly, and maintenance.

[0126] In one possible implementation, such as Figure 11 and Figure 12 As shown, the second limiting part 610 consists of at least two limiting holes spaced apart along the circumference of the limiting member 600. At least one of the inner and outer circumferential surfaces of the limiting holes is provided with a plurality of second arc-shaped grooves 611. The plurality of second arc-shaped grooves 611 are arranged sequentially along the circumference of the limiting member 600. The connection between two adjacent second arc-shaped grooves 611 abuts against the oil collecting member 400 to limit the displacement of the oil collecting member 400 along the circumference of the limiting holes.

[0127] Here, multiple second arc-shaped grooves 611 form a multi-point coordinated limiting mechanism, and the connection between two adjacent second arc-shaped grooves 611 forms a limiting ridge. These multiple limiting ridges collectively block the oil collecting component 400 from different directions, resulting in a better limiting effect for the second limiting part 610. The small size and large number of second arc-shaped grooves 611 provide a denser circumferential indexing position. The oil collecting component 400 can be selected to cooperate with different sets of second arc-shaped grooves 611, adapting to different layouts of the injection needles 210, thus offering strong versatility. Furthermore, the multiple second arc-shaped grooves 611 ensure that the cross-sections of both the inner and outer circumferential surfaces of the limiting hole are wavy.

[0128] In terms of specific structure, the limiting member 600 has three limiting holes, which are arranged at intervals along the circumference of the limiting member 600, and each limiting hole is arc-shaped. This arrangement facilitates the arrangement of the oil collecting member 400 and also ensures the structural strength of the limiting member 600. Of course, in actual implementation, the number of limiting holes can still be adjusted according to the usage requirements.

[0129] In one possible implementation, the limiting member 600 is detachably connected to the mounting base 500. With this configuration, when installing or removing the oil collecting component 400, the limiting member 600 can be first removed from the mounting base 500, releasing the radial constraint of the second limiting part 610 on the oil collecting component 400. This allows the operator to easily and efficiently place or remove the oil collecting component 400 from above. After testing, the limiting member 600 and the oil collecting component 400 can be disassembled and cleaned separately for easy maintenance.

[0130] When it is necessary to replace the oil collecting parts 400 with different diameters or quantities, the limiting parts 600 with corresponding limiting holes can be replaced separately without replacing the entire mounting base 500, which helps improve the compatibility of the testing system. In addition, the limiting parts 600 and the mounting base 500 are machined separately, which also helps to reduce the difficulty and cost of overall manufacturing.

[0131] In one possible implementation, such as Figure 5 , Figure 9 and Figure 11 As shown, the limiting member 600 is inserted into the mounting base 500. The limiting member 600 is provided with a third limiting part 613, and the mounting base 500 is provided with a limiting mating part 522. The third limiting part 613 and the limiting mating part 522 are inserted into each other to limit the displacement of the limiting member 600 along the circumference of the mounting base 500. Here, the insertion connection method is simple and facilitates the installation and removal of the limiting member 600. In terms of specific structure, the insertion of the third limiting part 613 and the limiting mating part 522 helps to improve the positional stability of the limiting member 600 in the installed state.

[0132] like Figure 5 As shown, a second insertion groove is provided at the bottom of the limiting member 600, and the top of the second connecting body 525 is inserted into the second insertion groove. A mounting hole 612 is provided on the limiting member 600, which passes through the second insertion groove, and the first connecting body 513 passes through the mounting hole 612 to insert into the second connecting body 525. This arrangement not only facilitates the connection between the first base 510 and the second base 520, but also enhances the reliability of the connection between the first base 510 and the second base 520 with the help of the limiting member 600.

[0133] like Figure 8 As shown, the limiting fitting part 522 includes a plurality of second limiting protrusions disposed on the outer periphery of the top end of the second connector 525. The plurality of second limiting protrusions are arranged at intervals along the circumference of the second connector 525, and along the axial direction of the second connector 525, each second limiting protrusion extends from the top to the bottom of the second connector 525.

[0134] like Figure 11As shown, the third limiting part 613 includes a plurality of limiting grooves provided on the limiting member 600. By interlocking the second limiting protrusion and the limiting grooves, not only can the displacement of the limiting member 600 along the circumferential direction of the second connecting body 525 be restricted, but the limiting member 600 can also be positioned on the second base 520. The cross-sectional shape of the second limiting protrusion can be an arc shape or the like, and the cross-sectional shape of the limiting groove can be adapted to the cross-sectional shape of the second limiting protrusion.

[0135] Here, the limiting member 600 and the second seat 520 are connected by a plug-in joint; they can be inserted during installation and pulled out during disassembly, making the operation simple and quick. The first connecting body 513 passes through the limiting member 600 and then plugs into the second connecting body 525, providing an axial anti-disengagement function, which helps to improve the connection reliability between the first seat 510 and the second seat 520, as well as between the limiting member 600 and the second seat 520.

[0136] like Figure 1 As shown, the testing system in this embodiment further includes a weighing unit 800, which is used to weigh the oil collecting components 400 before and after oil collection. The total mass of each oil collecting component 400 after oil collection is subtracted from its initial empty mass to obtain the mass of oil collected by each oil collecting component 400 within the effective metering time window. Dividing this oil mass by a preset time period yields the average mass flow rate of each injection needle 210.

[0137] In specific implementation, the weighing unit 800 can be a high-precision electronic scale from the existing technology, and its weighing accuracy should meet the accuracy requirements of the flow consistency test of the injection ring 200. By weighing the mass difference of each oil collection component 400 before and after metering, the average mass flow rate of each injection needle 210 is calculated based on the mass difference and a preset time. Then, the degree of deviation between the flow rates of each injection needle 210 can be calculated, and the flow consistency index of the injection ring 200 can be evaluated.

[0138] The method of using the fuel injection ring flow consistency testing system in this application embodiment is as follows:

[0139] The fuel injection ring 200 assembly to be tested is mounted on the first mounting portion 511 of the first base 510. The circumferential positioning members 230 of the fuel injection ring 200 are inserted between adjacent teeth on the first mounting platform 523, with the outer circumferential surface of the positioning member 230 abutting against the sidewall of the tooth, thus achieving circumferential positioning of the fuel injection ring 200. The first limiting portion 512 abuts against the bottom end of the positioning member 230, restricting the displacement of the positioning member 230 towards the second base 520, thus achieving axial positioning of the fuel injection ring 200. This allows the fuel injection ring 200 to be mounted on the first base 510.

[0140] Weigh the empty oil collection component 400 using the weighing unit 800 and record the weight. Then, according to the number and circumferential position of the injection needles 210 of the injection ring 200 to be tested, insert the bottom of the corresponding number of oil collection components 400 one by one into the corresponding positions of the insertion slots of the second mounting part 521 on the second base 520. The positions of each oil collection component 400 are arranged in a one-to-one correspondence with the positions of each injection needle 210 of the injection ring 200 to be tested.

[0141] The limiting member 600 is installed on the second seat 520. The second insertion groove at the bottom of the limiting member 600 is inserted into the top of the second seat 520, and the second limiting protrusion of the second seat 520 is inserted into the limiting groove on the limiting member 600 to restrict the circumferential rotation of the limiting member 600. The first connecting body 513 passes through the mounting hole 612 on the limiting member 600 and is inserted into the second connecting body 525 to axially lock the limiting member 600 onto the second seat 520. At this time, each oil collecting part 400 is respectively inserted into the corresponding limiting hole on the limiting member 600.

[0142] The first seat 510, with the fuel injection ring 200 installed, is passed from top to bottom through the central through hole of the limiting member 600, so that the lower part of the first seat 510 is connected to the upper part of the second seat 520. After the connection is completed, each fuel injection needle 210 is aligned with each of the oil collection members 400 below in the circumferential and axial directions (the outlet of the fuel injection needle 210 is located inside the oil collection member 400).

[0143] Start the drive pump 170, adjust the return oil valve 150 and the flow regulator 130 to allow the oil to circulate in the return oil branch 140 for a period of time to vent air and stabilize the oil supply. Then monitor the oil supply status through the flow detection device 120 and set the target operating condition (flow rate or pressure condition). Set the valve opening time T (i.e., the preset time) on the timer controller 320 and set the trigger mode. Trigger the timer controller 320 to open the normally closed control valve 310 and keep it connected for the specified time before closing it, completing one cycle of synchronous metering; repeat multiple times if necessary and take the average.

[0144] The first base 510, the injection ring 200, and the limiting member 600 are disassembled sequentially, and each oil collecting component 400 is removed one by one. The total mass of each oil collecting component 400 after the test is weighed by the weighing unit 800. The mass of the oil collecting component 400 before liquid collection is subtracted from the total mass of each oil collecting component 400 after the test to obtain the mass of oil collected by each oil collecting component 400 within a preset time (effective connection time). The average mass flow rate of each injection needle 210 is obtained by dividing the oil mass by the preset time of the timing control unit 300. Based on the average mass flow rate of each injection needle 210, the degree of deviation between the flow rates of each injection needle 210 is calculated, thereby obtaining the flow consistency index of the injection ring 200.

[0145] When testing different specifications of the fuel injection ring 200 is required, such as changing the number, diameter / orifice, or arrangement of the fuel injection needles 210, only the corresponding first seat 510, second seat 520, and limiting component 600 need to be replaced. The entire testing system can be rebuilt without needing to perform comparative testing. Furthermore, the order of some testing steps can be adjusted to meet the testing requirements.

[0146] The fuel injection ring flow consistency test system of this application embodiment firstly sets a control valve 310 between the fuel injection ring 200 and the fuel supply regulating unit 100, and controls the opening of the control valve 310 by the timing controller 320. This is beneficial to realize the synchronous start and stop of the fuel supply of the fuel injection ring 200 and the unified metering time window control, thereby significantly improving the synchronization and repeatability of multiple flow consistency tests on the fuel injection ring 200.

[0147] Secondly, by directly using the opening and closing times of the solenoid valve as the start and end boundaries of the timing controller 320, the deviation of the effective measurement time window caused by valve switching lag or inconsistent process triggering in traditional testing is fundamentally avoided. This significantly reduces the systematic error in the low-flow test of the multi-injection needle 210, making the uniformity evaluation results of different rounds and different parts more stable and comparable.

[0148] Furthermore, the first seat 510 for mounting the fuel injection ring 200 is detachably connected to the second seat 520 for mounting multiple fuel collection components 400. When the number, diameter / orifice, and arrangement of the fuel injection needles 210 change, the first seat 510 or the second seat 520 can be replaced to adapt to the fuel injection ring 200, thereby improving the flexibility of testing.

[0149] This application also proposes a method for testing the consistency of fuel injection ring flow, applicable to the fuel injection ring flow consistency testing system in any of the above embodiments. Figure 13 As shown, the test method includes: when the control valve 310 controls the fuel supply regulating unit 100 and the fuel injection ring 200 to connect, the timing controller 320 starts timing, the fuel supply regulating unit 100 supplies fuel to the fuel injection ring 200, and multiple fuel collecting components 400 collect the fuel flowing out of the multiple fuel injection needles 210 of the fuel injection ring 200. When the fuel supply regulating unit 100 and the fuel injection ring 200 have been connected for a preset time, the timing controller 320 stops timing at the same time as controlling the fuel supply regulating unit 100 and the fuel injection ring 200 to disconnect through the control valve 310.

[0150] The testing method here involves starting a timer simultaneously with the connection of the fuel supply regulating unit 100 and the fuel injection ring 200 by the timing control unit 300, and disconnecting the fuel supply regulating unit 100 and the fuel injection ring 200 when the timer reaches a preset duration. This single on / off action of the timing control unit 300 uniformly defines a consistent effective fuel supply duration for all fuel injection needles 210. Multiple fuel collection devices 400 collect the fuel flowing out of each fuel injection needle 210 within the effective fuel supply duration.

[0151] Fuel supply on / off and timing start / stop are synchronously executed by the same timing control unit 300, eliminating the deviations between the timing start and fuel supply start time, and between the timing end and fuel supply stop time caused by operator reaction time differences in manual timing schemes in related technologies. The preset duration is precisely set and automatically executed by the timing control unit 300, ensuring that the fuel supply duration of each test is strictly consistent. This helps to solve the technical problem of inconsistent test times in multiple tests in manual timing schemes, thereby improving the repeatability and reference value of the fuel injection ring flow consistency test results.

[0152] The detailed flowchart of the testing method in this application is as follows: Figure 14 As shown, specifically, oil collecting members 400, matching the number of injection needles 210, are inserted into the second mounting portion 521 of the first base 510, ensuring a one-to-one correspondence between the oil collecting members 400 and the injection needles 210. Then, a limiting member 600 is installed outside the first base 510. The injection ring 200 is then fixed to the second base 520 through the cooperation of multiple positioning members 230 on the injection ring 200 and the first mounting portion 511 on the second base 520. The injection ring 200 and the second base 520 are then mounted on the first base 510. Finally, the injection ring 200 and the second base 520 are integrally mounted on the first base 510, resulting in the assembled structure as shown... Figure 3 As shown.

[0153] Next, the drive pump 170 is turned on, and the return oil valve 150 and flow regulator 130 are adjusted to allow the oil to circulate and vent air in the return oil branch 140 until a stable oil supply is achieved. The opening duration of the control valve 310 is set on the timer controller 320, and the triggering method is set. The timer controller 320 is triggered, the control valve 310 opens and closes after maintaining the preset duration. The mass of each oil collecting component 400 before oil collection and the mass of each oil collecting component 400 after oil collection are weighed using the weighing unit 800.

[0154] When repeated testing is required, the following steps are repeated: triggering the timing controller 320, opening the control valve 310, and closing it after maintaining the preset duration. The weighing unit 800 weighs each oil collecting component 400 before and after oil collection to ensure the same oil flow time in each test. Finally, the average mass flow rate of each injection needle 210 is calculated using the formula for average mass flow rate to obtain the flow consistency index.

[0155] It should be noted that the installation sequence of the fuel injection ring 200 on the second housing 520 can be interchanged with the installation sequence of the oil collection component 400 and the limiting component 600 on the first housing 510. Additionally, the weighing unit 800 can perform weighing before the oil collection component 400 is installed on the first housing 510. The number of repeated tests can be determined according to usage requirements.

[0156] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. An oil injection ring flow uniformity test system, characterized in that, include: A fuel supply regulating unit (100) is used to supply fuel to the fuel inlet of the fuel injection ring (200); A timing control unit (300) includes a control valve (310) and a timing controller (320). The control valve (310) is used to connect or disconnect the fuel supply regulating unit (100) and the fuel injection ring (200). The timing controller (320) is electrically connected to the control valve (310) and is configured to set a preset duration, start timing when the control valve (310) is opened, and stop timing when the control valve (310) is closed. The oil collection unit includes multiple oil collection components (400), and the multiple oil collection components (400) are arranged one-to-one with the multiple oil injection needles (210) on the oil injection ring (200). The oil collection components (400) are used to collect the oil flowing out of the oil injection needles (210) respectively.

2. The oil injection ring flow uniformity test system of claim 1, wherein, The oil supply regulating unit (100) includes a main pipeline (110), a flow detection device (120) and a flow regulating device (130). The inlet of the main pipeline (110) is used to receive oil from an external oil storage unit, and the outlet of the main pipeline (110) is connected to the control valve (310). The flow detection element (120) and the flow regulating element (130) are both connected to the main pipeline (110) and located between the inlet of the main pipeline (110) and the control valve (310). The flow detection element (120) is used to detect the flow rate of the oil, and the flow regulating element (130) is used to regulate the flow rate of the oil.

3. The oil injection ring flow uniformity test system of claim 2, wherein, The oil supply regulating unit (100) further includes a return oil branch (140) and a return oil valve (150). The inlet of the return oil branch (140) is connected to the main pipeline (110). The inlet of the return oil branch (140) is located between the flow regulating element (130) and the inlet of the main pipeline (110). The outlet of the return oil branch (140) is used to connect to the external oil storage unit. The return oil valve (150) is connected to the return oil branch (140) and is used to connect or disconnect the return oil branch (140). And / or, the oil supply regulating unit (100) further includes at least one of a filter element (160) and a drive pump (170), the filter element (160) being connected to the main pipeline (110) and located between the flow detection element (120) and the inlet of the main pipeline (110) for filtering oil; the drive pump (170) being connected to the inlet end of the main pipeline (110) for driving oil from the external oil storage section into the main pipeline (110).

4. The oil control ring flow uniformity test system of any of claims 1-3, wherein, It also includes a mounting base (500), on which a first mounting part (511) and a second mounting part (521) are provided. The first mounting part (511) is used to be detachably connected to the oil injection ring (200), and the second mounting part (521) is located below the first mounting part (511) and is used to be detachably connected to a plurality of oil collection parts (400).

5. The oil injection ring flow uniformity test system of claim 4, wherein, The mounting base (500) includes a first base body (510) and a second base body (520), the second base body (520) being detachably connected to the first base body (510); The first mounting part (511) is disposed on the second seat (520), and the first mounting part (511) has a plurality of first mounting positions (5112) in the circumferential direction. A plurality of positioning members (230) of the oil injection ring (200) in the circumferential direction are selectively connected to the first mounting positions (5112); and / or, the second mounting part (521) is disposed on the first seat (510), and the second mounting part (521) has a plurality of second mounting positions in the circumferential direction. A plurality of oil collecting members (400) are selectively connected to the second mounting positions.

6. The oil injection ring flow uniformity test system of claim 5, wherein, The first mounting part (511) includes a plug-in platform (5111) disposed on the first base (510), and the first mounting position (5112) includes teeth disposed on the outer peripheral surface of the plug-in platform (5111). The teeth extend along the axial direction of the plug-in platform (5111), and a plurality of positioning members (230) are selectively inserted into the plug-in platform (5111) and abut against the plurality of teeth.

7. The oil control ring flow uniformity test system of claim 6, wherein, The insertion platform (5111) is provided with a radially protruding first limiting part (512), which is located below the plurality of teeth. The first limiting part (512) is used to abut against the positioning member (230) to limit the displacement of the positioning member (230) toward the second seat (520).

8. The oil control ring flow consistency test system of claim 5, wherein, The second mounting part (521) includes a plug groove provided on the second base (520). The plug groove is arranged circumferentially along the second base (520). Multiple plug positions in the plug groove constitute multiple second mounting positions. The bottoms of multiple oil collecting parts (400) are selectively inserted into the corresponding second mounting positions.

9. The oil injection ring flow uniformity test system of claim 8, wherein, At least one of the inner and outer circumferential surfaces of the insertion groove is provided with a plurality of first arc-shaped grooves (524). The plurality of first arc-shaped grooves (524) are arranged sequentially along the circumferential direction of the insertion groove. The connection point of two adjacent first arc-shaped grooves (524) abuts against the oil collecting member (400) to limit the displacement of the oil collecting member (400) along the circumferential direction of the insertion groove.

10. The oil control ring flow uniformity test system of claim 8, wherein, The oil collecting component (400) includes a cylinder (410) and a base (420) connected to the bottom end of the cylinder (410). The base (420) protrudes radially outward relative to the cylinder (410) and is inserted into the insertion slot. Multiple bases (420) are arranged staggered up and down along the circumference of the insertion slot, and two adjacent bases (420) are partially stacked in the height direction.

11. The oil injection ring flow uniformity test system of claim 4, wherein, It also includes a limiting member (600) connected to the mounting base (500), the limiting member (600) having a second limiting portion (610) extending circumferentially along the limiting member (600), the second limiting portion (610) being located between the first mounting portion (511) and the second mounting portion (521) for the plurality of oil collecting members (400) to pass through, the second limiting portion (610) being used to limit the displacement of the oil collecting members (400) radially along the limiting member (600).

12. The oil control ring flow uniformity test system of claim 11, wherein, The second limiting part (610) consists of at least two limiting holes spaced apart along the circumference of the limiting member (600). At least one of the inner and outer circumferential surfaces of the limiting holes is provided with a plurality of second arc-shaped grooves (611). The plurality of second arc-shaped grooves (611) are arranged sequentially along the circumference of the limiting member (600). The connection between two adjacent second arc-shaped grooves (611) abuts against the oil collecting member (400) to limit the displacement of the oil collecting member (400) along the circumference of the limiting hole. And / or, the limiting member (600) is inserted into the mounting base (500), the limiting member (600) is provided with a third limiting part (613), the mounting base (500) is provided with a limiting mating part (522), the third limiting part (613) is inserted into the limiting mating part (522) to limit the displacement of the limiting member (600) along the circumference of the mounting base (500).

13. A method for testing the flow consistency of an oil injection ring, applied to the oil injection ring flow consistency testing system of any one of claims 1 to 12, characterized in that, include: When the control valve (310) controls the oil supply regulating unit (100) and the injection ring (200) to connect, the timing controller (320) starts timing, the oil supply regulating unit (100) supplies oil to the injection ring (200), and multiple oil collecting components (400) collect the oil flowing out of multiple injection needles (210) of the injection ring (200); when the oil supply regulating unit (100) and the injection ring (200) are connected for a preset time, the timing controller (320) stops timing at the same time as the control valve (310) controls the oil supply regulating unit (100) and the injection ring (200) to disconnect.

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