Internal combustion engine jet impact test equipment and method using combustible gas combustion

Abstract

The present invention relates to the field of internal combustion engine combustion test, and specifically discloses an internal combustion engine jet impact test equipment and method using combustible gas combustion, comprising an experimental chassis and a pressure detection mechanism installed on the experimental chassis, the pressure detection mechanism comprising a test baffle and a pressure sensor, a spring is further arranged between the pressure sensor and the test baffle; the rotating rods are sequentially sleeved from thin to thick, and are correspondingly connected with a plurality of the retractable rotors, when one of the retractable rotors is rotated, the corresponding rotating rod follows the rotation; a lifting lock rod corresponding to the lifting hook is fixed on the rotating rod, and the locking and release of the corresponding outer cylinder are achieved by the rotation of the rotating rod. Through this scheme, the size of the combustion space is adjusted vertically by utilizing the difference in height, and the size of the combustion space is adjusted horizontally by utilizing the difference in diameter. In this way, when the scheme is used, it is only necessary to release the corresponding outer cylinder to complete the adjustment of the size of the horizontal combustion space, which is simple and efficient.

Description

Technical Field

[0001] The invention relates to the technical field of internal combustion engine combustion testing, and in particular to an internal combustion engine jet impact testing device and method using combustible gas combustion. Background Art

[0002] Conducting research on high-pressure direct injection mixing, turbulent flow, and ignition processes in confined spaces of natural gas will help expand the research content in the field of natural gas combustion and have great scientific significance. Focusing on improving the combustion performance and combustion quality of natural gas direct injection engines, especially the performance optimization of key components of high-pressure natural gas injection systems, it will help break through the key technologies of high-efficiency and low-emission natural gas power units and achieve energy conservation and emission reduction;

[0003] The high-speed jet of natural gas enters the constant volume bomb and mixes while jetting. The process is a complex dynamic turbulent flow. The mixing time with the background air is very short, and the process of forming the combustible mixture is more complicated. This increases the difficulty of measuring the high-speed jet process and its entrainment of air.

[0004] This application is to study the detection of gas pressure generated when natural gas is burned in a confined space, and to test the natural gas pressure conditions of cylinders with different diameters in different combustion spaces;

[0005] However, the optical testing scheme adopted by existing test equipment based on constant volume bombs has been widely used. However, the fixed combustion space generally used in the research cannot be adjusted, resulting in the need to use multiple different combustion space detection equipment for the test, which is inefficient and the experimental equipment does not have a good protective structure. Summary of the invention

[0006] The purpose of the present invention is to provide a jet impact test device and method for an internal combustion engine using combustible gas combustion to solve the problems raised in the above-mentioned background technology. This scheme can complete the switching of combustion spaces of different diameters through a single device, achieve high detection efficiency, and utilize a mechanical protection structure to achieve a more stable protection effect.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: an internal combustion engine jet impact test device using combustible gas combustion, comprising an experimental chassis and a pressure detection mechanism installed on the experimental chassis, the pressure detection mechanism comprising a test baffle and a pressure sensor, and a spring is further arranged between the pressure sensor and the test baffle;

[0008] It also includes a sleeve mechanism capable of adjusting the size of the combustion space, the sleeve mechanism comprising a plurality of outer cylinders which are layered and sleeved on the outside of the experimental chassis from the inside to the outside, a functional cover plate being installed on the sleeve mechanism, and a locking mechanism for locking or releasing the plurality of outer cylinders being installed on the functional cover plate;

[0009] A lifting hook and a sealing plate are fixed to one end of the plurality of outer cylinders facing the functional cover plate:

[0010] The locking mechanism comprises a retractable box, a rotating retractable rod is movably connected inside the retractable box, and a plurality of retractable rotors are movably arranged outside the retractable box, the rotating retractable rod comprises a plurality of rotating rods with different diameters, the rotating rods are sequentially sleeved from thin to thick, and are correspondingly connected to a plurality of the retractable rotors, when one of the retractable rotors is rotated, the corresponding rotating rod rotates accordingly;

[0011] A lifting lock rod corresponding to the lifting hook is fixed on the rotating rod, and the locking and releasing of the corresponding outer cylinder is achieved through the rotation of the rotating rod.

[0012] Preferably, the functional cover is also provided with a protective mechanism, which includes a protective body, a sealing inverted cover is movably arranged in the protective body, an inverted groove cooperating with the sealing inverted cover is opened in the protective body, and the sealing inverted cover is internally threadedly connected with a protective rod that passes through the sealing inverted cover.

[0013] Preferably, the protection rod comprises a hollow rod and a solid rod, one end of the solid rod is threadedly connected to the test baffle, and the other end is fixedly connected to the hollow rod, and a release notch is provided on the hollow rod.

[0014] Preferably, the plurality of rotating rods include a middle rod, a thin rod and a thick rod.

[0015] Preferably, the thin rod is sleeved in the middle rod, one end of which is movably connected to the storage box, and the other end of which passes through the middle rod and the thick rod and is fixedly connected to the corresponding storage rotor.

[0016] Preferably, the middle rod is sleeved in the thick rod, one end of which is movably connected to the thin rod, and the other end of which passes through the thick rod and is fixedly connected to the corresponding retractable rotor.

[0017] Preferably, one end of the thick rod is movably connected to the middle rod, and the other end thereof penetrates through the shell wall of the storage box and is fixedly connected to the corresponding storage rotor.

[0018] Preferably, a sealing bottom plate cooperating with the top of the experimental bottom frame is provided on one side of the plurality of outer cylinders facing the experimental bottom frame.

[0019] A method for using a jet impact test device for an internal combustion engine using combustible gas combustion, which is applied to any of the above-mentioned jet impact test devices for an internal combustion engine using combustible gas combustion, comprises the following steps:

[0020] S1: Raise the height of the entire outer cylinder as needed to adjust the size of the combustion space vertically;

[0021] S2: Release the corresponding number of outer cylinders as needed to adjust the size of the combustion space in the horizontal direction. When performing S2, release the outer cylinders from the inside to the outside in sequence, so that the diameter of the combustion space can be ignited and tested in sequence from small to large.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. This solution uses the difference in height to adjust the size of the combustion space vertically, and uses the difference in diameter to adjust the size of the combustion space horizontally. When this solution is used, it only needs to release the corresponding outer cylinder to complete the adjustment of the size of the horizontal combustion space, which is simple and efficient.

[0024] 2. This solution uses a protective rod to allow the test baffle and the protective rod to move synchronously when an accidental combustion occurs. If the movement distance is excessive, the release notch on the protective rod will contact the combustion space to release the high-pressure gas in the combustion space to avoid dangerous combustion expansion. A mechanical structure is used for protection instead of an electronic air pressure valve to avoid the problem of electronic valves burning out at high temperatures and causing failure to protect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating retractable rod of the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of the innermost outer cylinder released by the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the release middle layer outer cylinder of the present invention;

[0031] Figure 7 Schematic diagram of the structure comparing the normal test movement range and the unexpected movement range of the sealed inverted cover of the present invention, wherein a is the normal test movement range of the sealed inverted cover, and b is the unexpected movement range of the sealed inverted cover;

[0032] Figure 8 This is a schematic diagram of the three-dimensional structure of the sealed inverted cover of the present invention;

[0033] Fig. 9 It is a schematic diagram of the working principle of the test system of the present invention.

[0034] In the figure: 1. experimental base frame; 101. test baffle; 2. outer cylinder; 201. lifting hook; 202. sealing plate; 3. functional cover plate; 301. storage box; 302. rotating storage rod; 303. middle rod; 304. thin rod; 305. storage rotor; 306. lifting lock rod; 307. thick rod; 4. protective body; 401. sealing inverted cover; 5. protective rod; 501. hollow rod; 502. release notch; 503. solid rod. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] See also Figure 1-Figure 2 , Figure 5-Figure 6 and Fig. 9 , a jet impact test equipment for an internal combustion engine using combustible gas combustion, comprising an experimental chassis 1 and a pressure detection mechanism installed on the experimental chassis 1, the pressure detection mechanism comprising a test baffle 101 and a pressure sensor, a spring is further arranged between the pressure sensor and the test baffle 101, the combustible gas used in this scheme may be natural gas or methane, etc.;

[0038] The outside of the experimental base frame 1 is sleeved with a plurality of outer cylinders 2 from the inside to the outside, and the plurality of outer cylinders 2 from the inside to the outside can be collectively referred to as a sleeve mechanism. The sleeve mechanism can adjust both the height and the diameter. A functional cover plate 3 is arranged above the outer cylinder 2. A lifting hook 201 and a sealing plate 202 are fixed to one end of the outer cylinder 2 facing the functional cover plate 3. A sealing groove matching the sealing plate 202 is provided on the functional cover plate 3. A lifting power mechanism can be arranged on the functional cover plate 3, and the functional cover plate 3 can be lifted and hung by hand, pulled up by a steel wire rope, or a cylinder can be used as a power source for the functional cover plate 3 to move up and down.

[0039] The functional cover plate 3 is also provided with a nozzle and an ignition mechanism. The function of the ignition mechanism is to ignite the oil and combustible gas, such as natural gas, sprayed from the nozzle. The ignition mechanism can be similar to the spark plug of an automobile.

[0040] Specifically, this solution can form combustion spaces of different volumes according to different heights by raising the height of the outer cylinder 2 in the vertical direction while keeping the diameter in the transverse direction unchanged;

[0041] At the same time, through this solution, the outer cylinder 2 is gradually released from the inside to the outside, and the diameter is gradually expanded while the height of the outer cylinder 2 remains unchanged in the vertical direction, so that combustion spaces of different volumes are formed according to different diameters;

[0042] In this way, the present solution can not only switch to different combustion volumes in the vertical direction as needed, but also switch to different combustion volumes in the horizontal direction through this structure;

[0043] First, several outer cylinders 2 are connected and locked with the functional cover plate 3, and then the height of the functional cover plate 3 is raised as needed, and the functional cover plate 3 drives the outer cylinder 2 to move upward, so that a relatively closed combustion space is formed. At this time, the height of the functional cover plate 3 can be adjusted according to the test requirements, so as to form combustion test volumes of different heights. For safety needs, a gas valve with pressure detection can be set on the functional cover plate 3 to discharge the combustion gas after combustion. How to exhaust and intake air is a prior art and will not be described in detail;

[0044] When adjusting the diameter of the test space, the unnecessary outer cylinders 2 are released as needed, leaving the outer cylinders 2 that meet the required diameter. For example, when the largest diameter space is required during testing, at this time, except for the outermost outer cylinder 2 that is locked, the remaining outer cylinders 2 are released;

[0045] When the outer tube 2 is released or locked, it can be realized through the storage box 301 installed on the functional cover plate 3 .

[0046] See also Figure 3-Figure 4 , the present invention provides an embodiment of locking and releasing the outer cylinder 2: a rotating retracting rod 302 is provided in the retracting box 301, and a retracting rotor 305 is connected to the outer wall of one side;

[0047] The rotating retractable rod 302 includes a middle rod 303, a thin rod 304 and a thick rod 307, wherein the thin rod 304 is sleeved on the middle rod 303, one end of which is movably connected to the retractable box 301, and the other end of which passes through the middle rod 303 and the thick rod 307 and is fixedly connected to the corresponding retractable rotor 305; the middle rod 303 is sleeved in the thick rod 307, one end of which is movably connected to the thin rod 304, and the other end of which passes through the thick rod 307 and is fixedly connected to the corresponding retractable rotor 305; one end of the thick rod 307 is movably connected to the middle rod 303, and the other end of which passes through the shell wall of the retractable box 301 and is fixedly connected to the corresponding retractable rotor 305;

[0048] When the center rod 303, the thin rod 304 and the thick rod 307 are rotated, it is only necessary to rotate the corresponding retractable rotor 305;

[0049] The middle rod 303, the thin rod 304 and the thick rod 307 are all provided with a lifting lock rod 306 that cooperates with the lifting hook 201;

[0050] For example, there are three, namely, a middle rod 303, a thin rod 304 and a thick rod 307, then the retractable rotor 305 is provided with three corresponding different diameters and is also segmentedly sleeved, the middle rod 303 corresponds to the retractable rotor 305 of medium diameter, the thin rod 304 corresponds to the retractable rotor 305 of the smallest diameter, and the thick rod 307 corresponds to the thick rod 307 of the largest diameter;

[0051] Specifically, for example, if the present solution requires the use of an outer cylinder 2 of a corresponding medium diameter, the retractable rotor 305 with the smallest diameter is rotated, and the retractable rotor 305 with the smallest diameter drives the fixedly connected thin rod 304 to rotate, and the thin rod 304 drives the fixedly connected lifting lock rod 306, so that the rotating lifting lock rod 306 releases the lifting hook 201 fixedly connected to the outer cylinder 2 with the smallest diameter, so that the outer cylinder 2 with the smallest diameter is released under the action of gravity, and the diameter of the combustion space is now larger than the original combustion space.

[0052] See also Figure 7-Figure 8 The present invention provides an embodiment having a protective function during a combustion test: a protective body 4 is installed on the functional cover plate 3 and fixed on the functional cover plate 3, a sealing inverted cover 401 is movably arranged in the protective body 4, a protective rod 5 is penetrated in the sealing inverted cover 401, the protective rod 5 comprises a hollow rod 501 and a solid rod 503, one end of the solid rod 503 is threadedly connected to the test baffle 101, and the other end is fixedly connected to the hollow rod 501, a release notch 502 is opened on the hollow rod 501, the hollow rod 501 is movably arranged in the protective body 4, and extends outward after penetrating the functional cover plate 3, and the end of the hollow rod 501 extending outward has an opening and is connected to the release notch 502;

[0053] Specifically, under normal circumstances, the gas after combustion in the combustion space is controllable, and the gas is within the normal downward pressure range when the test baffle 101 is tested for pressure. However, when an accident occurs, the burning gas suddenly becomes larger and expands rapidly, and the structure does not have a corresponding release notch 502, so the gas is released, and the equipment may seriously explode under the gas pressure;

[0054] In this way, the present scheme sets a range interval according to the situation. When the test baffle 101 is pressed down, the test baffle 101 drives the protective rod 5 to move downward synchronously, and the protective rod 5 drives the sealing inverted cover 401 to move downward synchronously, and returns to its original position under the action of the spring. Within the normal range, the sealing inverted cover 401 will not move beyond the range, so the release notch 502 opened on the hollow rod 501 will not be exposed to the combustion space. If the set distance exceeds the normal experimental range, the sealing inverted cover 401 continues to move downward, and the release notch 502 is exposed to the combustion space and connected with it. The gas in the combustion space enters the hollow rod 501 through the release notch 502, and releases the gas to the outside through the opening at the end of the hollow rod 501.

[0055] This solution provides a method for using a jet impact test device for an internal combustion engine using combustible gas combustion, which is applied to the above-mentioned jet impact test device for an internal combustion engine using combustible gas combustion, and includes the following steps:

[0056] S1: Raise the height of the entire outer tube 2 as needed to adjust the size of the combustion space vertically;

[0057] S2: Release the corresponding number of outer cylinders 2 as needed to adjust the size of the combustion space in the horizontal direction. When performing S2, release the outer cylinders 2 from the inside to the outside in sequence, so that the diameter of the combustion space can be ignited and tested in sequence from small to large, or selected and replaced as needed.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An internal combustion engine jet impact test device using combustible gas combustion, comprising a test frame (1) and a pressure detection mechanism mounted on the test frame (1), the pressure detection mechanism comprising a test baffle (101) and a pressure sensor, a spring being further arranged between the pressure sensor and the test baffle (101); Features: It also includes a sleeve mechanism capable of adjusting the size of the combustion space, the sleeve mechanism comprising a plurality of outer cylinders (2) which are layered and sleeved on the outside of the experimental base frame (1) from the inside to the outside, a functional cover plate (3) being installed on the sleeve mechanism, and a locking mechanism for locking or releasing the plurality of outer cylinders (2) being installed on the functional cover plate (3); A lifting hook (201) and a sealing plate (202) are fixed to one end of the plurality of outer cylinders (2) facing the functional cover plate (3): The locking mechanism comprises a storage box (301), a rotating storage rod (302) is movably connected inside the storage box (301), and a plurality of storage rotors (305) are movably arranged outside the storage box, the rotating storage rod (302) comprises a plurality of rotating rods with different diameters, the rotating rods are sequentially sleeved from thin to thick, and are correspondingly connected to a plurality of the storage rotors (305), and when one of the storage rotors (305) is rotated, the corresponding rotating rod rotates accordingly; A lifting lock rod (306) corresponding to the lifting hook (201) is fixed on the rotating rod, and the corresponding outer cylinder (2) is locked and released through the rotation of the rotating rod.

2. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 1, characterized in that: The functional cover plate (3) is also provided with a protection mechanism, the protection mechanism comprising a protection body (4), a sealing inverted cover (401) being movably arranged in the protection body (4), a groove cooperating with the sealing inverted cover (401) being provided in the protection body (4), and a protection rod (5) penetrating the sealing inverted cover (401) being internally threadedly connected to the sealing inverted cover (401).

3. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 2, characterized in that: The protection rod (5) comprises a hollow rod (501) and a solid rod (503); one end of the solid rod (503) is threadedly connected to the test baffle (101), and the other end is fixedly connected to the hollow rod (501); and a release notch (502) is provided on the hollow rod (501).

4. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 1, characterized in that: The plurality of rotating rods include a middle rod (303), a thin rod (304) and a thick rod (307).

5. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 4, characterized in that: The thin rod (304) is sleeved inside the middle rod (303), one end of which is movably connected to the storage box (301), and the other end of which passes through the middle rod (303) and the thick rod (307) and is fixedly connected to the corresponding storage rotor (305).

6. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 4, characterized in that: The middle rod (303) is sleeved in the thick rod (307), one end of which is movably connected to the thin rod (304), and the other end of which passes through the thick rod (307) and is fixedly connected to the corresponding retractable rotor (305).

7. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 4, characterized in that: One end of the thick rod (307) is movably connected to the middle rod (303), and the other end thereof penetrates through the shell wall of the storage box (301) and is fixedly connected to the corresponding storage rotor (305).

8. The jet impact test equipment for an internal combustion engine using combustible gas combustion according to claim 1, characterized in that: A sealing bottom plate that cooperates with the top of the experimental bottom frame (1) is provided on one side of the plurality of outer cylinders (2) facing the experimental bottom frame (1).

9. A method for using a jet impact test device for an internal combustion engine using combustible gas combustion, applied to the jet impact test device for an internal combustion engine using combustible gas combustion as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Raise the height of the entire outer cylinder (2) as required to adjust the size of the combustion space in the vertical direction; S2: releasing the corresponding number of outer cylinders (2) as required to adjust the size of the combustion space in the horizontal direction; When performing S2, the outer cylinder (2) is released from the inside to the outside in sequence, so that the diameter of the combustion space can be ignited and tested in sequence from small to large.

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