Uncoupled nozzle test device

Abstract

The present invention provides a non-coupled nozzle testing device, comprising: a clamping body assembly having multiple test channels, including at least an oil needle test channel and a gas needle test channel, one end of the oil needle test channel corresponding to and communicating with the oil needle mounting cavity of the test nozzle, and one end of the gas needle test channel corresponding to and communicating with the gas needle mounting cavity of the test nozzle; at least a portion of an oil needle displacement detection assembly movably disposed within the oil needle test channel, the oil needle displacement detection assembly being used to detect the displacement of the oil needle; at least a portion of a gas needle displacement detection assembly movably disposed within the gas needle test channel, the gas needle displacement detection assembly being used to detect the displacement of the gas needle; a fuel flow detection element being used to detect the fuel flow of the test nozzle, and a gas flow detection element being used to detect the gas flow of the test nozzle. The present invention can address the problem of the prior art lacking a device for non-coupled nozzle testing.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engine injector testing, in particular to a non-coupled nozzle testing device. Background Art

[0002] The most common DFDI dual-fuel injector on the market today is an injector with two combustion modes: main fuel injection and fuel-pilot gas ignition. There is no nozzle flow testing device yet. The most common HPDI injector nozzle structure is a coaxial coupled nozzle consisting of an air needle, an oil needle and a needle valve body that can inject two fuels, while the DFDI injector nozzle structure is an uncoupled nozzle consisting of one or more air needles, oil needles and a needle valve body that can inject two fuels.

[0003] The prior art provides a flow measurement device, specifically a high-pressure flow measurement device for a long needle valve fuel injector assembly, belonging to the field of fuel injector technology. The device comprises a clamping body, a clamping sleeve, a fine-tuning knob, a supporting probe, and a flow measurement device. The clamping body is connected to the clamping sleeve via a connector, the rear end of the clamping sleeve being threadedly connected to a locking sleeve, which in turn is threadedly connected to a sealing joint. A long needle valve capable of sliding back and forth is housed within the clamping sleeve, the front end of which is connected to the fuel injector. The fuel injector is embedded within the supporting probe, which is embedded within the tightening sleeve, which is threadedly connected to the clamping body. The beneficial effects of this invention include a compact and rational structure, quick and convenient testing, and accurate and reliable test results. It can measure the high-pressure flow of a long needle valve fuel injector assembly at different lifts, thereby independently assessing the flow stability and consistency of the long needle valve fuel injector assembly. This invention is a flow measurement device for a long needle valve assembly, specifically for single needle valve nozzles with no static leakage for a single fuel type, and cannot test the flow of uncoupled nozzles in dual-fuel injectors.

[0004] The prior art also provides a flow measurement device and method. The flow measurement device includes a clamping assembly, a displacement adjustment assembly, and a detection assembly. The clamping assembly includes a clamping body, an oil inlet channel, and an air inlet channel. The oil inlet channel and the air inlet channel are arranged on the clamping body, and the oil inlet channel is connected to the oil circuit of the dual-fuel nozzle, and the air inlet channel is connected to the air circuit of the dual-fuel nozzle. The displacement adjustment assembly includes an oil needle lift adjustment member and an air needle lift adjustment member arranged in the clamping assembly. The oil needle lift adjustment member is used to adjust the movement of the oil needle of the dual-fuel nozzle, and the air needle lift adjustment member is used to adjust the movement of the air needle of the dual-fuel nozzle. The detection assembly is used to detect the fuel flow sprayed from the oil circuit and the gas flow sprayed from the gas circuit respectively. The fuel and gas flow of the dual-fuel nozzle can be measured through a one-time assembly. The lift adjustment is continuous and convenient, which improves the accuracy of the oil and gas flow measurement. This invention is aimed at a dual-fuel coaxial coupled nozzle and cannot test the flow of a non-coupled nozzle of a dual-fuel injector.

[0005] Currently, no effective solutions have been proposed for the above technical problems. Summary of the Invention

[0006] The main purpose of the present invention is to provide a non-coupling nozzle testing device to solve the problem in the prior art of lacking a device for non-coupling nozzle testing.

[0007] To achieve the above-mentioned purpose, according to one aspect of the present invention, a non-coupled nozzle testing device is provided, comprising: a clamping body assembly, the clamping body assembly having a plurality of test channels, each test channel being independently arranged, the plurality of test channels comprising at least an oil needle test channel and a gas needle test channel, one end of the oil needle test channel being arranged corresponding to and in communication with the oil needle mounting cavity of the test nozzle, and one end of the gas needle test channel being arranged corresponding to and in communication with the gas needle mounting cavity of the test nozzle; an oil needle displacement detection assembly, at least a portion of the oil needle displacement detection assembly being movably arranged in the oil needle test channel and in contact with the oil needle in the oil needle mounting cavity, the oil needle displacement detection assembly being used to detect the displacement of the oil needle; a gas needle displacement detection assembly, at least a portion of the gas needle displacement detection assembly being movably arranged in the gas needle test channel and in contact with the gas needle in the gas needle mounting cavity, the gas needle displacement detection assembly being used to detect the displacement of the gas needle; a flow testing assembly, the flow testing assembly comprising at least a fuel flow detection component and a gas flow detection component, the fuel flow detection component being used to detect the fuel flow of the test nozzle during the movement of the oil needle, and the gas flow detection component being used to detect the gas flow of the test nozzle during the movement of the gas needle.

[0008] Furthermore, the clamp body assembly also includes an air inlet channel and an oil inlet channel, one end of the air inlet channel is connected to an external air supply device, and the other end of the air inlet channel is connected to an air storage tank of the test nozzle, the first end of the oil inlet channel is used to connect to the external oil supply device, and the second end of the oil inlet channel is connected to the oil needle test channel, wherein the air storage tank is connected to the air needle mounting cavity.

[0009] Furthermore, an oil return chamber is formed between the end of the air needle displacement detection assembly close to the test nozzle and the air needle test channel, and the clamp body assembly also includes a first oil return channel, the first end of the first oil return channel is connected to the outside world, and the second end of the first oil return channel is connected to the oil return chamber.

[0010] Furthermore, the clamp body assembly also includes a second oil return channel, the first end of the second oil return channel is connected to the outside world, and the second end of the second oil return channel is connected to the oil needle test channel, wherein the first end of the second oil return channel is arranged away from the side where the test nozzle is located, and the first end of the oil inlet channel is arranged close to the side where the test nozzle is located.

[0011] Furthermore, the clamp body assembly also includes a sealing oil channel, a first end of the sealing oil channel is connected to an external oil supply device, a second end of the sealing oil channel is connected to a first end of the air needle sealing channel of the test nozzle, and a second end of the air needle sealing channel is connected to the air needle mounting cavity of the test nozzle.

[0012] Furthermore, the air needle displacement detection assembly includes: an air needle displacement rod, which extends into the air needle test channel, and the first end of the air needle displacement rod abuts the air needle; a lift block, which is arranged at the second end of the air needle displacement rod, and the lift block and the air needle displacement rod are arranged to move synchronously; an air needle displacement detection part, which is connected to any one of the air needle displacement rod and the lift block, and is used to detect the displacement of the air needle.

[0013] Furthermore, the air needle displacement detection assembly also includes: a lift adjustment nut, which is arranged on the side of the lift block away from the clamping body assembly, and the lift adjustment nut is arranged to move synchronously with the lift block; a nut fixing body, and the lift adjustment nut can be moved relative to the nut fixing body; along the axial direction of the air needle displacement rod, the lift adjustment nut, the lift block, and the air needle displacement rod are arranged to move synchronously, and the lift adjustment nut has an initial position. When the lift adjustment nut is in the initial position, the end of the lift adjustment nut away from the clamping body assembly is arranged flush with the end of the nut fixing body away from the clamping body assembly.

[0014] Furthermore, the air needle displacement rod includes: an air needle lift guide rod, the air needle lift guide rod extends into the air needle test channel, and the first end of the air needle lift guide rod abuts against the air needle; a connecting rod, the first end of the connecting rod abuts against the second end of the air needle lift guide rod, and the second end of the connecting rod is provided with a lift block; wherein the radial dimension of the connecting rod is smaller than the radial dimension of the air needle lift guide rod.

[0015] Furthermore, the air needle displacement detection assembly also includes: a lift locking member, at least part of the lift locking member can be movably arranged in the air needle test channel along the axial direction of the air needle test channel, the lift locking member is arranged at the first end of the connecting rod, and the connecting rod can be movably arranged relative to the lift locking member.

[0016] Furthermore, the clamp body assembly includes: a clamp body, which is provided with multiple test channels; a lift locking block, which has an assembly position for assembling with the clamp body and a separation position for separating from the clamp body; the lift locking block is arranged on one side of the clamp body, and the test nozzle is arranged on the other side of the clamp body.

[0017] By applying the technical solution of the present invention, the oil needle displacement detection assembly can detect the displacement of the oil needle and thereby determine the lift of the oil needle, the fuel flow detection element can test the fuel flow of the oil needle, and the oil needle displacement detection assembly and the fuel flow detection element can cooperate to test the fuel flow of the oil needle at different lifts; the gas needle displacement detection assembly can detect the displacement of the gas needle and thereby determine the lift of the gas needle, and the gas flow detection element can detect the gas flow of the gas needle, and the gas needle displacement detection assembly and the gas flow detection element can cooperate to test the gas flow of the gas needle at different lifts. The uncoupled nozzle test device of this embodiment can be applied to the testing of injectors with two combustion modes (main fuel injection and fuel pilot gas ignition) (i.e., DFDI injectors). When the uncoupled nozzle test device of this embodiment is used to test the uncoupled nozzle, the oil needle and the gas needle can be tested sequentially after the device is assembled, solving the problem of the lack of devices for uncoupled nozzle testing in the prior art. The uncoupled nozzle does not need to be tested on two devices, saving equipment space and testing time. The oil needle and gas needle can be tested for continuous lift motion through the oil needle test channel and the gas needle test channel, and the lift adjustment is continuous and convenient, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It shows a structural schematic diagram of a first embodiment of a non-coupled nozzle testing device according to the present invention;

[0020] Figure 2 Shown Figure 1 A partial enlarged schematic diagram of part A;

[0021] Figure 3 Shown Figure 1 A partial enlarged schematic diagram of part B;

[0022] Figure 4 It shows a structural schematic diagram of a second embodiment of the uncoupled nozzle testing device according to the present invention;

[0023] Figure 5 Shown Figure 4 A partial enlarged schematic diagram of part C in the middle;

[0024] Figure 6 A schematic structural diagram of an embodiment of a clamping body of a non-coupled nozzle testing device according to the present invention is shown;

[0025] Figure 7 shows a first structural schematic diagram of a test nozzle according to the present invention;

[0026] Figure 8 A second structural schematic diagram of a test nozzle according to the present invention is shown.

[0027] The above drawings include the following reference numerals:

[0028] 1. Oil needle displacement detection part; 2. Gas needle displacement detection part; 3. Oil needle displacement adjustment rod;

[0029] 4. Gas needle displacement detection assembly; 41. Nut fixing body; 42. Lift adjustment nut; 43. Lift block; 44. Connecting rod; 45. Lift locking piece; 46. Gas needle lift guide rod;

[0030] 5. Clamp body assembly; 50. Test channel; 501. Oil needle test channel; 502. Gas needle test channel;

[0031] 51. Clamp body tightening cap; 52. Lift locking block; 53. Clamp body;

[0032] 531, oil inlet channel; 532, sealing oil channel; 533, air inlet channel; 534, second oil return channel; 535, oil return chamber; 536, connecting channel; 537, first oil return channel;

[0033] 6. Test nozzle; 602. Oil needle installation cavity; 603. Gas needle installation cavity; 61. Needle valve body; 62. Oil needle; 63. Gas needle;

[0034] 611, oil channel; 612, fuel injection hole; 613, first needle valve body oil channel; 614, second needle valve body oil channel; 615, annular groove; 616, connecting oil channel; 617, gas storage tank; 618, connecting gas channel; 619, inner cavity annular zone; 61A, gas injection hole;

[0035] 7. Tighten the nozzle cap;

[0036] 8. Sealing assembly; 81. First sealing ring; 82. Second sealing ring. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0041] Combine Figures 1 to 6 As shown, according to a specific embodiment of the present application, a non-coupled nozzle testing device is provided.

[0042] Specifically, the uncoupled nozzle test device includes a clamp body assembly 5, an oil needle displacement detection assembly, an air needle displacement detection assembly 4 and a flow test assembly. The clamp body assembly 5 has multiple test channels 50, and each test channel 50 is independently arranged. The multiple test channels 50 include at least an oil needle test channel 501 and an air needle test channel 502. One end of the oil needle test channel 501 is corresponding to and connected with the oil needle installation cavity 602 of the test nozzle 6, and one end of the air needle test channel 502 is corresponding to and connected with the air needle installation cavity 603 of the test nozzle 6; at least part of the oil needle displacement detection assembly is movably arranged on the oil needle The oil needle displacement detection component is in the test channel 501 and contacts the oil needle 62 in the oil needle installation cavity 602. The oil needle displacement detection component is used to detect the displacement of the oil needle 62; at least part of the gas needle displacement detection component 4 is movably arranged in the gas needle test channel 502 and contacts the gas needle 63 in the gas needle installation cavity 603. The gas needle displacement detection component 4 is used to detect the displacement of the gas needle 63; the flow test component includes at least a fuel flow detection component and a gas flow detection component. The fuel flow detection component is used to detect the fuel flow of the test nozzle 6 during the movement of the oil needle 62, and the gas flow detection component is used to detect the gas flow of the test nozzle 6 during the movement of the gas needle 63.

[0043] By applying the technical solution of this embodiment, the oil needle displacement detection assembly can detect the displacement of the oil needle 62, and then determine the lift of the oil needle 62. The fuel flow detection component can test the fuel flow of the oil needle 62. The oil needle displacement detection assembly and the fuel flow detection component can cooperate to test the fuel flow of the oil needle 62 at different lifts; the gas needle displacement detection assembly 4 can detect the displacement of the gas needle 63, and then determine the lift of the gas needle 63. The gas flow detection component can detect the gas flow of the gas needle 63. The gas needle displacement detection assembly 4 and the gas flow detection component can cooperate to test the gas flow of the gas needle 63 at different lifts. The uncoupled nozzle test device in this embodiment can be applied to the testing of injectors with two combustion modes, namely main fuel injection and fuel pilot gas ignition (i.e., DFDI injectors). When the uncoupled nozzle is tested using the uncoupled nozzle test device in this embodiment, the oil needle 62 and the gas needle 63 can be tested successively after the device is assembled, thereby solving the problem of the lack of devices for uncoupled nozzle testing in the prior art. The uncoupled nozzle does not need to be tested on two devices, saving equipment space and testing time. The oil needle 62 and the gas needle 63 can be tested for continuous lift motion through the oil needle test channel 501 and the gas needle test channel 502, and the lift adjustment is continuous and convenient, and the operation is easy.

[0044] It should be noted that the uncoupled nozzle test device of the present application is mainly used to test injectors with two combustion modes, namely main fuel injection and fuel pilot gas ignition (i.e., DFDI injectors). The uncoupled nozzle component usually has an oil needle 62 and multiple gas needles 63. The uncoupled nozzle test device of the present application can be assembled once and the flow capacity of the oil needle 62, one, some or all gas needles 63 can be measured in sequence, so that the uncoupled nozzle does not need to be tested on two devices, saving equipment space and testing time. The lift adjustment of the device is continuous and convenient. This device has a simple structure, easy disassembly and assembly, easy operation, and strong reliability. During testing, the flow of one gas needle can be tested according to needs, or the flow of some or all gas needles can be tested.

[0045] In an exemplary embodiment of the present application, the test nozzle 6 of the present application is a two-gas needle uncoupled nozzle component. The uncoupled nozzle test device of the present application is also applicable to other multi-gas needle uncoupled nozzle components, such as Figure 7 and Figure 8 As shown, the specific structure of the test nozzle 6 of the present application is as follows:

[0046] The test nozzle 6 includes a needle valve body 61, an oil needle 62, and an air needle 63. The needle valve body 61 is provided with an oil needle mounting chamber 602 and two air needle mounting chambers 603 arranged in sequence along a first direction. The oil needle mounting chamber 602 is arranged between the two air needle mounting chambers 603. Along the second preset direction, the needle valve body 61 is provided with two air storage tanks 617. The two air storage tanks 617 are respectively located on both sides of the oil needle mounting chamber 602. The upper end surface of the needle valve body 61 has a connecting oil channel 616. Each air storage tank 617 is connected to each air needle mounting chamber 603 through a connecting air channel 618.

[0047] The clamp body assembly 5 further includes an air inlet channel 533 and an oil inlet channel 531. One end of the air inlet channel 533 communicates with an external air supply device, and the other end communicates with an air storage tank 617 of the test nozzle 6. The first end of the oil inlet channel 531 is used to communicate with an external oil supply device, and the second end of the oil inlet channel 531 communicates with the oil needle test channel 501. The air storage tank 617 communicates with the air needle mounting cavity 603. The provision of the air inlet channel 533 enables gas flow testing of the test nozzle 6, and the provision of the oil inlet channel 531 enables fuel flow testing of the test nozzle 6.

[0048] In this embodiment, the connection position between the oil inlet channel 531 and the oil needle test channel 501 is located near the test nozzle 6. The first end of the oil inlet channel 531 is an oil inlet port opened on the outer wall of the clamp body assembly 5, and one end of the air inlet channel 533 is an air inlet port opened on the outer wall of the clamp body assembly 5.

[0049] Specifically, the clamp body assembly 5 further includes a second oil return channel 534. The first end of the second oil return channel 534 communicates with the outside world, and the second end of the second oil return channel 534 communicates with the oil needle test channel 501. The first end of the second oil return channel 534 is located away from the side where the test nozzle 6 is located, while the first end of the oil inlet channel 531 is located closer to the side where the test nozzle 6 is located. When the flow rate of the oil needle 62 at different lifts is tested, fuel leaking from above the oil needle 62 and the needle valve body 61 flows out of the second oil return channel 534 to the oil return port.

[0050] In this embodiment, a second oil return passage 534 is provided at the end of the clamp body assembly 5 away from the test nozzle 6, and the oil inlet passage 531 is located between the side of the clamp body assembly 5 close to the test nozzle 6 and the second oil return passage 534. The first end of the second oil return passage 534 is a second oil return port provided on the outer wall of the clamp body assembly 5.

[0051] Furthermore, the clamp body assembly 5 also includes a sealing oil passage 532. A first end of the sealing oil passage 532 is connected to an external oil supply device, a second end of the sealing oil passage 532 is connected to a first end of the gas needle sealing passage of the test nozzle 6, and a second end of the gas needle sealing passage is connected to the gas needle mounting cavity 603 of the test nozzle 6. The sealing oil passage 532 maintains a stable pressure in the gap between the needle valve body 61 and the gas needle 63, thereby preventing noise from gas leaking from the gap during gas needle flow testing and improving the accuracy of gas flow testing.

[0052] In this embodiment, an annular gap is defined between the air needle mounting cavity 603 and the air needle 63, forming an inner cavity annulus 619. The air reservoir 617 communicates with the inner cavity annulus 619. The sealing oil passage 532 maintains a stable pressure within the inner cavity annulus 619 formed by the needle valve body 61 and the air needle 63. The first end of the sealing oil passage 532 is a sealing oil inlet formed on the outer wall of the clamp body assembly 5.

[0053] In the embodiment of the present application, the gas needle sealing channel includes a connecting oil channel 616 opened on the needle valve body 61, a first needle valve body oil channel 613, a second needle valve body oil channel 614, and an annular groove 615 formed by the needle valve body 61 and the gas needle 63.

[0054] Furthermore, an oil return chamber 535 is formed between the end of the air needle displacement detection assembly 4 proximal to the test nozzle 6 and the air needle test channel 502. The clamp body assembly 5 also includes a first oil return channel 537, a first end of which communicates with the outside world, and a second end of which communicates with the oil return chamber 535. When testing the flow rate of the air needle 63 at different lifts, sealing oil leaking between the air needle 63 and the needle valve body 61 can flow out of the oil return chamber 535 and the first oil return channel 537 to the oil return port.

[0055] In an exemplary embodiment of the present application, there are multiple oil return chambers 535, each of which is connected by a connecting channel 536. At least one oil return chamber 535 is connected to a first oil return channel 537. The first end of the first oil return channel 537 is a first oil return port provided on the outer wall of the clamp body assembly 5.

[0056] In an exemplary embodiment of the present application, an oil return groove is provided on the outer peripheral surface of the end of the air needle displacement rod close to the air needle 63, and an oil return chamber 535 is formed between the oil return groove and the air needle test channel 502. The clamp body assembly 5 includes a first oil return channel 537, and the first end of the first oil return channel 537 is connected to the outside world, and the second end of the first oil return channel 537 is connected to the oil return chamber 535.

[0057] Specifically, the air needle displacement detection assembly 4 includes an air needle displacement rod, a lift block 43 and an air needle displacement detection part 2. The air needle displacement rod extends into the air needle test channel 502, and the first end of the air needle displacement rod abuts against the air needle 63; the lift block 43 is arranged at the second end of the air needle displacement rod, and the lift block 43 is arranged to move synchronously with the air needle displacement rod; the air needle displacement detection part 2 is connected to any one of the air needle displacement rod and the lift block 43, and the air needle displacement detection part 2 is used to detect the displacement of the air needle 63.

[0058] In this embodiment, the air needle displacement rod abuts the air needle 63. During the lift test, the movement of the air needle 63 drives the air needle displacement rod, which in turn drives the lift block 43 to move synchronously. The air needle displacement detection member 2 can measure the displacement of the air needle 63 in real time. The air needle displacement rod extends into the air needle test channel 502, allowing the air needle displacement rod to maintain a fixed direction of movement, accurately measuring the displacement of the air needle 63. Preferably, the air needle displacement detection member 2 is connected to the lift block 43.

[0059] Furthermore, the air needle displacement detection assembly 4 also includes a lift adjustment nut 42 and a nut fixing body 41. The lift adjustment nut 42 is arranged on the side of the lift block 43 away from the clamp body assembly 5. The lift adjustment nut 42 and the lift block 43 are arranged to move synchronously. The lift adjustment nut 42 can be moved relative to the nut fixing body 41. Along the axial direction of the air needle displacement rod, the lift adjustment nut 42, the lift block 43, and the air needle displacement rod are arranged to move synchronously. The lift adjustment nut 42 has an initial position. When the lift adjustment nut 42 is in the initial position, the end of the lift adjustment nut 42 away from the clamp body assembly 5 is flush with the end of the nut fixing body 41 away from the clamp body assembly 5. By setting the lift adjustment nut 42 and the nut fixing body 41, the lift adjustment nut 42 has an initial position. During testing, the initial position is used to debug the zero position reset of the air needle displacement detection component 2, which can facilitate displacement measurement and calculation in subsequent tests.

[0060] Specifically, the air needle displacement rod includes an air needle lift guide rod 46 and a connecting rod 44. The air needle lift guide rod 46 extends into the air needle test channel 502, and the first end of the air needle lift guide rod 46 abuts against the air needle 63; the first end of the connecting rod 44 abuts against the second end of the air needle lift guide rod 46, and the second end of the connecting rod 44 is provided with a lift block 43; wherein, the radial dimension of the connecting rod 44 is smaller than the radial dimension of the air needle lift guide rod 46.

[0061] In this embodiment, the air needle lift guide rod 46 abuts the air needle 63, enabling transmission of the lift motion of the air needle 63. The air needle lift guide rod 46 has a large radial dimension, making it less susceptible to shaking during motion. Furthermore, the air needle lift guide rod 46 and the clamp body 53 partially form a mating fit, resulting in a very small gap between the air needle lift guide rod 46 and the clamp body 53, while maintaining good mobility. The connecting rod 44 is connected to the air needle lift guide rod 46 to transmit motion to the lift block 43. The connecting rod 44 has a small radial dimension, allowing an annular space to be left between the connecting rod 44 and the air needle test channel 502. This annular space can be used to set a limiter to adjust the lift displacement range of the air needle displacement rod.

[0062] Specifically, the air needle displacement detection assembly 4 also includes a lift locking member 45. Along the axial direction of the air needle test channel 502, at least part of the lift locking member 45 can be movably arranged in the air needle test channel 502. The lift locking member 45 is arranged at the first end of the connecting rod 44, and the connecting rod 44 can be moved relative to the lift locking member 45.

[0063] In this embodiment, the lift locking member 45 is provided to adjust the lift range of the air needle displacement rod. Specifically, the lift locking member 45 is adjusted axially to a specified position to provide a specified distance between the lift locking member 45 and the air needle lift guide rod 46. This specified distance constitutes the lift range of the air needle displacement rod. When the air needle lift guide rod 46 abuts the lift locking member 45, the air needle displacement rod cannot move further. When only one of the multiple air needles 63 is being tested, the lift locking member 45 corresponding to the remaining air needles 63 can be directly adjusted to a locked position abutting the air needle lift guide rod 46, preventing the corresponding air needle 63 from lifting.

[0064] Preferably, the lift locking member 45 and the air needle test channel 502 are threaded fitting structures, and the lift locking member 45 is a lift locking nut.

[0065] Specifically, the clamp body assembly 5 includes a clamp body 53 and a lift locking block 52. The clamp body 53 is provided with multiple test channels 50. The lift locking block 52 has an assembly position for assembly with the clamp body 53 and a separation position for separation from the clamp body 53. The lift locking block 52 is located on one side of the clamp body 53, and the test nozzle 6 is located on the other side of the clamp body 53. The lift locking block 52 can be used to lock and release the oil needle displacement detection assembly, the gas needle displacement detection assembly 4, and the clamp body 53.

[0066] In an exemplary embodiment of the present application, the clamp body assembly 5 further includes a clamp body tightening cap 51. The clamp body tightening cap 51 has a locked state for locking the lift locking block 52 and the clamp body 53, and a released state for releasing the lift locking block 52 from the clamp body 53. The provision of the clamp body tightening cap 51 can ensure that the lift locking block 52 and the clamp body 53 are tightly connected.

[0067] In an exemplary embodiment of the present application, the oil needle displacement detection assembly includes an oil needle displacement adjusting rod 3 and an oil needle displacement detection member 1, at least part of the oil needle displacement adjusting rod 3 extends into the oil needle test channel 501 and abuts against the oil needle 62; the oil needle displacement detection member 1 is arranged at the end of the oil needle displacement adjusting rod 3 away from the oil needle 62, and the oil needle displacement detection member 1 is used to detect the displacement amount of the oil needle displacement adjusting rod 3.

[0068] In a preferred embodiment of the present application, the oil needle displacement detection component 1 and the gas needle displacement detection component 2 are both displacement sensors.

[0069] In an exemplary embodiment of the present application, the uncoupled nozzle testing device also includes a sealing assembly 8, which includes at least a first sealing ring 81 and a second sealing ring 82. The first sealing ring 81 is installed between the clamp body 53 and the air needle lift guide rod 46 to prevent the return oil from leaking upward from the mating part gap (the gap between the air needle lift guide rod 46 and the clamp body 53). The second sealing ring 82 is installed between the oil needle 62 and the clamp body 53 to prevent the return oil from leaking upward from the mating part gap (the gap between the oil needle 62 and the clamp body 53).

[0070] In an exemplary embodiment of the present application, the lower end diameter of the inner hole where the clamp body 53 and the gas needle 63 cooperate is larger than the outer diameter of the gas needle 63, thereby ensuring that the lift of the gas needle 63 is not affected when testing different lift flow rates required by the gas needle 63.

[0071] The working principle of the uncoupled nozzle testing device in the above embodiment is as follows:

[0072] When testing the fuel flow rate of the uncoupled nozzle assembly's needle 62 at different lifts, first move the needle displacement adjustment rod 3 downward, driving the needle 62 into its seat. This contact forms a seal with the needle valve body 61, and the needle displacement sensor reading at this point is reset to zero. By reading the needle displacement sensor's stroke data, adjust the needle displacement adjustment rod 3's lift to the desired range for the needle flow test. Then, open the fuel inlet control switch. Fuel flows through the fuel passages, sequentially from the fuel inlet channel 531 and then the fuel passage 611, ultimately exiting the fuel nozzle 612. The flow rate of the needle 62 at this lift is then measured using a fuel flow meter.

[0073] When testing the gas flow rate of the gas needle 63 of the non-coupled nozzle component at different lifts, because the non-coupled nozzle generally has multiple gas needles, the number and number of the test gas needles 63 should be determined first. Secondly, the lift locking nut on the test gas needle 63 is moved upward by a distance greater than the lift of the gas needle 63 to be measured, and then the lift adjustment nut 42 is adjusted downward until the upper end surface of the lift adjustment nut 42 is flush with the upper end surface of the nut fixing body 41. Then, the lift locking nut corresponding to the non-test gas needle 63 is adjusted downward to drive the gas needle lift guide rod 46 and the non-test gas needle 63 downward, so that the non-test gas needle 63 contacts the needle valve body 61 to form a seat surface seal, and then the connecting rod 44 corresponding to the test gas needle 63 is adjusted downward to drive the gas needle lift guide rod 46 and the test gas needle 63 downward, so that the test gas needle 63 contacts the needle valve body 61 to form a seat surface seal, and the gas needle displacement sensor reading at this time is reset to zero. By reading the stroke data of the gas needle displacement sensor, the lift adjustment nut 42 is adjusted to the range required for the gas needle flow test. First, the sealing oil control switch is turned on. The sealing oil flows along the oil channel into the sealing oil channel 532, the connecting oil channel 616, the first needle valve body oil channel 613, and the second needle valve body oil channel 614, and then into the annular groove 615 formed by the needle valve body 61 and the gas needle 63. Then, the air inlet control switch is turned on. The gas flows along the air channel into the air inlet channel 533, the gas storage tank 617, the connecting air channel 618, and the inner cavity annular zone 619 formed by the needle valve body 61 and the gas needle 63, and finally is ejected from the gas nozzle 61A. The gas needle flow rate at this lift is tested using a gas flow meter.

[0074] When testing the flow rates of the oil needle at different lifts, fuel leaking from above the oil needle 62 and the clamp body assembly flows out through the second oil return channel to the oil return port. When testing the flow rates of the air needle 63 at different lifts, fuel leaking from above the air needle and needle valve assembly within the annular groove 615 flows out through the oil return chamber 535, the connecting channel 536, and the first oil return channel 537 to the oil return port.

[0075] Among them, the fuel inlet pressure is the fuel pressure in the normal main injection fuel mode. According to the working principle of the oil-controlled air injector, the fuel inlet pressure is 5 bar lower than the sealing oil inlet pressure.

[0076] The uncoupled nozzle testing device in this embodiment can also test the flow consistency between different gas needles of the uncoupled nozzle according to needs, and then determine the consistency of the processing quality of the uncoupled nozzle.

[0077] The following beneficial effects are achieved by using the uncoupled nozzle testing device of this embodiment for testing:

[0078] 1) The flow rate testing device in this embodiment can measure the oil needle flow rate and the gas needle flow rate of the uncoupled nozzle component at the same time without changing the fixture;

[0079] 2) The flow rate testing device in this embodiment can continuously adjust the lift of the oil needle 62 and the gas needle 63. After one assembly, various required lift flow rate data can be tested without multiple disassembly and assembly;

[0080] 3) The flow rate testing device of this embodiment can test the flow rate of a single air needle 63 as needed to compare the flow rate consistency of the nozzle holes of a single air needle 63, or can test the flow rate of all air needles 63 or the flow rate of some air needles 63 as needed;

[0081] 4) The flow rate test device of this embodiment can effectively prevent high-pressure gas from leaking from above the gap between the mating parts when testing the gas needle flow rate, thereby maintaining stable gas pressure, avoiding noise caused by gas leakage, reducing gas loss, and improving gas flow test accuracy;

[0082] 5) The flow rate test device of this embodiment has a simple structure, is easy to use, and is low-cost. The nozzle cap 7 and other parts can be borrowed from the supporting parts of the non-coupled nozzle injector of the type to be tested. The lift adjustment device and displacement sensor are basically universal. Only a few parts such as the clamp body 53 need to be separately trial-produced.

[0083] 6) The flow rate test device in this embodiment can be manually operated, has low requirements for the use environment, and does not require various automated devices. However, if necessary, it can be replaced with an automatic lift adjustment device;

[0084] 7) The flow rate testing device in this embodiment has high reliability and can operate continuously for a long time.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also falls within the scope of the present invention.

[0087] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A non-coupled nozzle testing device, characterized in that: include: A clamp body assembly (5), the clamp body assembly (5) having a plurality of test channels (50), each of the test channels (50) being independently arranged, the plurality of test channels (50) comprising at least an oil needle test channel (501) and an air needle test channel (502), one end of the oil needle test channel (501) being arranged in correspondence with and in communication with the oil needle mounting cavity (602) of the test nozzle (6), and one end of the air needle test channel (502) being arranged in correspondence with and in communication with the air needle mounting cavity (603) of the test nozzle (6); an oil needle displacement detection assembly, at least a portion of which is movably disposed in the oil needle test channel (501) and in contact with the oil needle (62) in the oil needle installation cavity (602), the oil needle displacement detection assembly being used to detect the displacement of the oil needle (62); an air needle displacement detection assembly (4), at least a portion of the air needle displacement detection assembly (4) being movably disposed in the air needle test channel (502) and in contact with the air needle (63) in the air needle installation cavity (603), the air needle displacement detection assembly (4) being used to detect the displacement of the air needle (63); A flow testing assembly, the flow testing assembly comprising at least a fuel flow detection component and a gas flow detection component, the fuel flow detection component being used to detect the fuel flow of the test nozzle (6) during the movement of the oil needle (62), and the gas flow detection component being used to detect the gas flow of the test nozzle (6) during the movement of the gas needle (63); The gas needle displacement detection component (4) comprises: An air needle displacement rod, the air needle displacement rod extending into the air needle test channel (502), and the first end of the air needle displacement rod abutting against the air needle (63); A lift block (43), the lift block (43) being arranged at the second end of the air needle displacement rod, the lift block (43) being arranged to move synchronously with the air needle displacement rod; An air needle displacement detection member (2), the air needle displacement detection member (2) being connected to any one of the air needle displacement rod and the lift block (43), the air needle displacement detection member (2) being used to detect the displacement of the air needle (63); The gas needle displacement rod comprises: An air needle lift guide rod (46), the air needle lift guide rod (46) extending into the air needle test channel (502), and a first end of the air needle lift guide rod (46) abutting against the air needle (63); a connecting rod (44), wherein a first end of the connecting rod (44) abuts against a second end of the air needle lift guide rod (46), and the lift block (43) is provided at the second end of the connecting rod (44); Wherein, the radial dimension of the connecting rod (44) is smaller than the radial dimension of the air needle lift guide rod (46).

2. The uncoupled nozzle testing device according to claim 1, characterized in that: The clamp body assembly (5) further comprises an air inlet channel (533) and an oil inlet channel (531), one end of the air inlet channel (533) being in communication with an external air supply device, and the other end of the air inlet channel (533) being in communication with an air storage tank (617) of the test nozzle (6), a first end of the oil inlet channel (531) being in communication with an external oil supply device, and a second end of the oil inlet channel (531) being in communication with the oil needle test channel (501), wherein the air storage tank (617) is in communication with the air needle mounting cavity (603).

3. The uncoupled nozzle testing device according to claim 2, characterized in that: An oil return chamber (535) is formed between an end of the air needle displacement detection assembly (4) close to the test nozzle (6) and the air needle test channel (502). The clamp body assembly (5) further comprises a first oil return channel (537). A first end of the first oil return channel (537) is communicated with the outside, and a second end of the first oil return channel (537) is communicated with the oil return chamber (535).

4. The uncoupled nozzle testing device according to claim 2, characterized in that: The clamp body assembly (5) further includes a second oil return channel (534), wherein a first end of the second oil return channel (534) is communicated with the outside, and a second end of the second oil return channel (534) is communicated with the oil needle test channel (501), wherein the first end of the second oil return channel (534) is arranged away from the side where the test nozzle (6) is located, and the first end of the oil inlet channel (531) is arranged close to the side where the test nozzle (6) is located.

5. The uncoupled nozzle testing device according to claim 2, characterized in that: The clamp body assembly (5) further comprises a sealing oil channel (532), wherein a first end of the sealing oil channel (532) is communicated with an external oil supply device, a second end of the sealing oil channel (532) is communicated with a first end of the air needle sealing channel of the test nozzle (6), and a second end of the air needle sealing channel is communicated with an air needle mounting cavity (603) of the test nozzle (6).

6. The uncoupled nozzle testing device according to claim 1, characterized in that: The gas needle displacement detection component (4) further comprises: A lift adjustment nut (42), the lift adjustment nut (42) being arranged on a side of the lift block (43) away from the clamp body assembly (5), the lift adjustment nut (42) being arranged to move synchronously with the lift block (43); a nut fixing body (41), wherein the lift adjustment nut (42) is movable relative to the nut fixing body (41); Along the axial direction of the air needle displacement rod, the lift adjustment nut (42), the lift block (43), and the air needle displacement rod are arranged to move synchronously, and the lift adjustment nut (42) has an initial position. When the lift adjustment nut (42) is in the initial position, an end of the lift adjustment nut (42) away from the clamp body assembly (5) is arranged flush with an end of the nut fixing body (41) away from the clamp body assembly (5).

7. The uncoupled nozzle testing device according to claim 1, characterized in that: The gas needle displacement detection component (4) further comprises: A lift locking member (45) is movably arranged in the air needle test channel (502) along the axial direction of the air needle test channel (502), and at least a portion of the lift locking member (45) is movably arranged in the air needle test channel (502). The lift locking member (45) is arranged at the first end of the connecting rod (44), and the connecting rod (44) is movably arranged relative to the lift locking member (45).

8. The uncoupled nozzle testing device according to any one of claims 1 to 5, characterized in that: The clamp body assembly (5) comprises: A clamp body (53), wherein a plurality of the test channels (50) are provided on the clamp body (53); A lift locking block (52), the lift locking block (52) having an assembly position for assembling with the clamp body (53) and a separation position for separating from the clamp body (53); The lift locking block (52) is arranged on one side of the clamp body (53), and the test nozzle (6) is arranged on the other side of the clamp body (53).

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