Engine combustion system steady flow test device

Abstract

The invention relates to the technical field of test devices, in particular to an engine combustion system steady flow test device which comprises a test bench, a combustion chamber is arranged at the top of the test bench, a core box is arranged at the top of the test bench, and an oil sprayer communicated with the combustion chamber is arranged on one side of the test bench; the limiting mechanism is arranged at the top of the test bed, and the limiting mechanism is used for limiting and fixing the position of the core box; in the test process, through mutual cooperation of a pressure regulating mechanism, a flow guide pipe and a flow guide channel, a rotating shaft can drive a second cone pulley to rotate by rotating a rotating block, and a rotating plate is driven to rotate synchronously under mutual engagement of a first cone pulley and the second cone pulley, so that the shielded area of a pressure regulating hole can be changed, the exhaust speed of the exhaust end is changed, and the test efficiency is improved. And the pressure in the combustion chamber is adjusted by adjusting the gas displacement, so that the effect of performing a steady flow test under different pressures of the combustion chamber can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of test devices, and in particular to a steady-flow test device for an engine combustion system. Background Art

[0002] During the development of the combustion system, a series of tests will be conducted to check whether it meets the requirements of the engine. The steady flow test device is a device used to detect the intake and exhaust performance and the coordinated airflow movement conditions with the combustion chamber.

[0003] After searching, a Chinese patent disclosed a test method for steady flow in the engine airway and its test tooling (CN102042907B). This patented technology changes the airflow condition of the engine airway through the test tooling, so that the airway test can more realistically simulate the actual engine operating conditions. Although this structure simulates the actual airflow condition and reduces the error of the airflow, it needs to be tested in conjunction with the combustion chamber during the actual test process;

[0004] A Chinese patent discloses a steady-flow test device for an engine combustion system (publication number: CN216116764U). This patented technology can inject test gas through the intake port of the intake mechanism. At the same time, the intake port is interconnected with the test air duct through the intake main pipe. Thus, the steady-flow test of the engine's combustion system can be completed by using the structure of the set test air duct and the combustion chamber. Although this structure cooperates with the combustion chamber to carry out the steady-flow test, it is necessary to simulate the airflow conditions under different pressures inside the combustion chamber during the actual test process.

[0005] Therefore, a steady flow test device for an engine combustion system is proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide an engine combustion system steady flow test device in order to solve the above-mentioned problem, so as to improve the problem that the existing structure is not convenient for adjusting the internal pressure of the combustion chamber during the test.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions: a steady flow test device for an engine combustion system, comprising: a test bench, a combustion chamber is provided on the top of the test bench, a core box is arranged on the top of the test bench, and an injector connected to the combustion chamber is arranged on one side of the test bench; a limiting mechanism, the limiting mechanism is arranged on the top of the test bench, and the limiting mechanism is used to limit and fix the position of the core box; the limiting mechanism includes two limiting blocks both arranged on the top of the test bench, limiting grooves are arranged on opposite sides of the two limiting blocks, a guide channel connected to the limiting groove is arranged on the other side of the limiting block, and a guide pipe connected to the guide channel is arranged on the surface of the limiting block; a pressure regulating mechanism, the pressure regulating mechanism includes a side of the limiting block, the pressure regulating mechanism is arranged at one end of the guide pipe on one side away from the limiting block, and the pressure regulating mechanism is used to adjust the pressure inside the combustion chamber; a purification mechanism, the purification mechanism is arranged on one side of the test bench, and the purification mechanism is used to purify and discharge the exhaust gas generated during the test.

[0008] Preferably, the pressure regulating mechanism includes a connecting block arranged at one end of the guide tube, a connecting block surface is provided with a connecting hole, one end surface of the guide tube is fixedly connected to the inner wall of the connecting hole, and a baffle is fixedly connected to the inner wall of one end of the guide tube close to the connecting block, one side of the baffle is flush with the end surface of the guide tube away from the limit block, and the surface of the baffle is provided with annularly distributed pressure regulating holes.

[0009] Preferably, the inner wall of the connecting block is fixedly connected to a protective shell, the inner wall of the protective shell is rotatably connected to a first cone wheel, one end of the first cone wheel is fixedly connected to a connecting shaft, the other end of the connecting shaft passes through the protective shell and is fixedly connected to a rotating plate, the other side of the rotating plate contacts with the surface of the baffle, a through groove corresponding to the pressure regulating hole is provided on the surface of the rotating plate, the surface of the first cone wheel is meshingly connected to the second cone wheel, the top of the second cone wheel is fixedly connected to a rotating shaft, the upper end of the rotating shaft passes through the protective shell and the connecting block in sequence and is fixedly connected to a rotating block rotatably connected to the inner wall of the connecting block.

[0010] Preferably, a pull block is provided on the top of the rotating block, a slider is fixedly connected to the bottom of the pull block, the inner wall of the connecting block is provided with evenly distributed slots, a block is fixedly connected to one side of the slider, one end of the block passes through the rotating block and extends to the interior of the adjacent slot, and a second spring is fixedly connected between the other side of the slider and the inner wall of the rotating block.

[0011] Preferably, an indicator line is provided on the surface of the connecting block, and an indicator block is fixedly connected to one side of the pulling block.

[0012] Preferably, two symmetrically distributed connecting rods are fixedly connected to the bottom of the limit block, a guide rod is fixedly connected to one side of the test bench, and the two connecting rods on one side are slidingly connected to the surface of the guide rod, and a motor is provided on the other side of the test bench, and the output shaft of the motor is fixedly connected to a bidirectional screw rod, and the two connecting rods on the other side are threadedly connected to the surface of the bidirectional screw rod.

[0013] Preferably, a sealing airbag is embedded and installed on the inner wall of the limit groove, and two symmetrically distributed storage cavities are opened on the inner wall of the limit groove. An adjusting rod is arranged inside the storage cavity, one end of the adjusting rod passes through the storage cavity and is fixedly connected to a trigger block, and a first spring is fixedly connected between one side of the trigger block and the inner wall of the storage cavity.

[0014] Preferably, two symmetrically distributed mounting shells are fixedly connected to the surface of the limit block, the mounting shells are coaxially arranged with the adjacent adjusting rod, the other end of the adjusting rod passes through the limit block and the adjusting rod in sequence and is fixedly connected with a sealing plate, the interior of the mounting shell and the sealing plate are filled with inert gas, the surface of the mounting shell is connected with a conduit, and the other end of the conduit is connected with the adjacent sealing airbag.

[0015] Preferably, the purification mechanism includes a purification box arranged on one side of the test bench, the inner wall of the purification box is fixedly connected with a partition, a dust reduction chamber is formed between one side of the partition and the inner wall of the purification box, the inner wall of the dust reduction chamber is fixedly connected with a mounting plate, the surface of the mounting plate is provided with evenly distributed air holes, dust reduction water is filled between the bottom of the mounting plate and the interior of the adjustment chamber, a filter chamber is formed between the other side of the partition and the inner wall of the purification box, an activated carbon filter element is fixedly connected to the inner wall of the filter chamber, a mounting tube is provided on the surface of the partition, one end of the mounting tube is connected to the dust reduction chamber, and the other end of the mounting tube passes through the activated carbon filter element and extends to the bottom of the activated carbon filter element.

[0016] Preferably, an exhaust pipe connected to the purification box is provided on the top of the purification box, and a bellows is provided on the top of the purification box. The lower end of the bellows is fixedly connected with an inlet pipe, and the lower end of the inlet pipe passes through the purification box and the mounting plate in sequence. The other end of the bellows is connected with a connecting pipe, and the other end of the connecting pipe is fixedly connected to the inner wall of the connecting hole.

[0017] The beneficial effects of the present invention are:

[0018] 1. During the test, by utilizing the cooperation of the pressure regulating mechanism, the guide tube and the guide channel, the rotating block can be rotated to drive the second cone wheel to rotate, and the first cone wheel and the second cone wheel can be meshed with each other to drive the rotating plate to rotate synchronously, thereby changing the blocked area of ​​the pressure regulating hole, thereby changing the exhaust speed at one end of the exhaust, adjusting the exhaust volume and then adjusting the pressure inside the combustion chamber, and achieving the effect of steady flow test under different pressure conditions in the combustion chamber;

[0019] 2. The setting of the guide pipe and the guide channel can simulate the intake manifold and exhaust manifold in actual use, simulate the airflow conditions in actual use, improve the accuracy of the test, and cooperate with the pressure regulating mechanism to simulate the influence of different pressure conditions of the combustion chamber on the airflow conditions, effectively improve the accuracy of the test and reduce the error;

[0020] 3. The limiting mechanism can be used to limit the position of the core box. By driving the two limiting blocks close to each other, the core box can be fixed between the two limiting grooves to avoid the core box position deviation affecting the test results during the test. At the same time, after the fixation is completed, the sealing effect of the connection between the two can be increased by inflating the sealing airbag to avoid the pressure relief caused by airflow leakage affecting the test results.

[0021] 4. The setting of the purification mechanism can guide the exhaust gas generated by the test into the dust reduction chamber, and use dust reduction water to treat the particulate matter in the exhaust gas. The exhaust gas after dust reduction treatment is guided by the installation pipe, and the harmful substances and odors are adsorbed under the action of the activated carbon filter, and finally discharged through the exhaust pipe, reducing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a partial explosion schematic diagram of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the limiting mechanism of the present invention;

[0025] Figure 4 It is a schematic diagram of the distribution of the sealing airbag and the limiting groove of the present invention;

[0026] Figure 5 for Figure 4 A magnified view of middle;

[0027] Figure 6 It is a schematic diagram of the connection between the baffle and the guide pipe of the present invention;

[0028] Figure 7 It is a schematic diagram of the distribution of the rotating plate and the first chasing wheel of the present invention;

[0029] Figure 8 for Figure 8 Enlarged view of middle B;

[0030] Fig. 9 It is a schematic structural diagram of the purification mechanism of the present invention.

[0031] In the figure: 1, test bench; 101, combustion chamber; 102, injector; 2, core box; 3, limit mechanism; 301, limit block; 302, guide tube; 303, limit groove; 304, connecting rod; 305, two-way screw rod; 306, motor; 307, guide rod; 308, sealing airbag; 309, trigger block; 310, guide channel; 311, installation shell; 312, guide tube; 313, adjustment rod; 314, storage chamber; 315, first spring; 4, pressure regulating mechanism; 401, connecting block; 402, baffle; 403, Pressure regulating hole; 404, rotating plate; 405, through groove; 406, rotating block; 407, pulling block; 408, indicating block; 409, rotating shaft; 410, protective shell; 411, first cone wheel; 412, second cone wheel; 413, sliding block; 414, clamping block; 415, clamping groove; 416, second spring; 5, purification mechanism; 501, purification box; 502, connecting pipe; 503, bellows; 504, partition; 505, mounting plate; 506, inlet pipe; 507, mounting pipe; 508, activated carbon filter; 509, exhaust pipe. DETAILED DESCRIPTION

[0032] 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.

[0033] When implementing: Figure 1-9As shown, a steady flow test device for an engine combustion system comprises: a test bench 1, a combustion chamber 101 is provided on the top of the test bench 1, a core box 2 is provided on the top of the test bench 1, and an injector 102 connected to the combustion chamber 101 is provided on one side of the test bench 1; a limiting mechanism 3, the limiting mechanism 3 is provided on the top of the test bench 1, and the limiting mechanism 3 is used to limit and fix the position of the core box 2; the limiting mechanism 3 comprises two limiting blocks 301 both provided on the top of the test bench 1, and limiting grooves 303 are provided on opposite sides of the two limiting blocks 301, and the limiting blocks A guide channel 310 connected to the limiting groove 303 is provided on the other side of 301, and a guide pipe 302 connected to the guide channel 310 is provided on the surface of the limiting block 301; a pressure regulating mechanism 4, the pressure regulating mechanism 4 includes a side of the limiting block 301, the pressure regulating mechanism 4 is arranged at one end of the guide pipe 302 on one side away from the limiting block 301, and the pressure regulating mechanism 4 is used to adjust the pressure inside the combustion chamber 101; a purification mechanism 5, the purification mechanism 5 is arranged on one side of the test bench 1, and the purification mechanism 5 is used to purify and discharge the exhaust gas generated during the test;

[0034] The fuel injector 102 is used for supplying fuel, and cooperates with the combustion chamber 101 and the core box 2 to simulate the airflow condition under the actual operation condition of the engine;

[0035] The top of the test bench 1 is fixedly connected with uniformly distributed positioning pins. The core box 2 is used as a structure to be tested, and an intake channel and an exhaust channel are opened on its surface. The intake manifold and the exhaust manifold can be simulated by setting the guide channel 310 and the guide pipe 302 to achieve the effect of simulating the intake and exhaust during the actual use of the engine, thereby improving the reference value of the test. The bottom of the core box 2 is provided with positioning holes corresponding to the positioning pins.

[0036] like Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, the pressure regulating mechanism 4 includes a connecting block 401 arranged at one end of the guide tube 302, a connecting hole is provided on the surface of the connecting block 401, one end surface of the guide tube 302 is fixedly connected to the inner wall of the connecting hole, and a baffle 402 is fixedly connected to the inner wall of one end of the guide tube 302 close to the connecting block 401, one side of the baffle 402 is flush with the end surface of the guide tube 302 away from the limit block 301, and an annularly distributed pressure regulating holes 403 are provided on the surface of the baffle 402, and a protective shell 410 is fixedly connected to the inner wall of the connecting block 401, and a first cone wheel 411 is rotatably connected to the inner wall of the protective shell 410. One end of the first cone wheel 411 is fixedly connected to a connecting shaft, the other end of the connecting shaft passes through the protective shell 410 and is fixedly connected to a rotating plate 404, the other side of the rotating plate 404 is in contact with the surface of the baffle 402, and a through groove 405 corresponding to the pressure regulating hole 403 is provided on the surface of the rotating plate 404, the surface of the first cone wheel 411 is meshedly connected to the second cone wheel 412, the top of the second cone wheel 412 is fixedly connected to a rotating shaft 409, the upper end of the rotating shaft 409 passes through the protective shell 410 and the connecting block 401 in sequence and is fixedly connected to a rotating block 406 rotatably connected to the inner wall of the connecting block 401;

[0037] During the test, the rotating block 406 can be rotated to drive the rotating shaft 409 to rotate, thereby driving the second cone wheel 412 connected thereto to rotate. Under the action of the second cone wheel 412 and the first cone wheel 411 engaging with each other, the connecting shaft can be driven to rotate together, and then the position of the rotating plate 404 can be rotated to change the position of the through slot 405, and by changing the position of the through slot 405, the part of the rotating plate 404 without the through slot 405 can be used to cover the pressure regulating hole 403, that is, during the test, the exhaust speed at one end of the exhaust can be changed to reduce the exhaust volume to adjust the internal pressure of the combustion chamber 101, thereby achieving the effect of performing a steady flow test on the core box 2 under different pressure conditions.

[0038] like Figure 2 , Figure 6 , Figure 7 and Figure 8 As shown, a pull block 407 is provided on the top of the rotating block 406, and a slider 413 is fixedly connected to the bottom of the pull block 407. The inner wall of the connecting block 401 is provided with evenly distributed card grooves 415. A card block 414 is fixedly connected to one side of the slider 413. One end of the card block 414 passes through the rotating block 406 and extends to the inside of the adjacent card groove 415. A second spring 416 is fixedly connected between the other side of the slider 413 and the inner wall of the rotating block 406.

[0039] An indicator line is provided on the surface of the connection block 401, and an indicator block 408 is fixedly connected to one side of the pull block 407. The setting of the indicator block 408 and the indicator line is in accordance with the degree of shielding of the pressure regulating hole 403;

[0040] When it is necessary to rotate the rotating block 406, the slider 413 is driven by pulling the pull block 407 to separate the block 414 from the slot 415. In this process, the second spring 416 is compressed and the limit on the rotating block 406 is released. At this time, the rotating block 406 can be rotated to adjust the rotating plate 404. After the adjustment is completed, the pull block 407 is released. Under the action of the second spring 416, the block 414 can be reset and inserted into the adjacent slot 415. The limiting of the rotating block 406 can be completed under the mutual cooperation of the block 414 and the slot 415, thereby achieving the effect of limiting the position of the rotating plate 404, thereby avoiding the situation that the internal pressure of the combustion chamber 101 is unstable during the test.

[0041] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the bottom of the limit block 301 is fixedly connected with two symmetrically distributed connecting rods 304, one side of the test bench 1 is fixedly connected with a guide rod 307, the two connecting rods 304 on one side are slidably connected to the surface of the guide rod 307, the other side of the test bench 1 is provided with a motor 306, the output shaft of the motor 306 is fixedly connected with a bidirectional screw rod 305, the two connecting rods 304 on the other side are threadedly connected to the surface of the bidirectional screw rod 305, the inner wall of the limit groove 303 is embedded with a sealing airbag 308, the inner wall of the limit groove 303 is provided with two symmetrically distributed storage cavities 314, the storage cavity 314 is provided with an adjusting rod 313, and the adjusting rod 313 is provided inside. One end of the rod 313 passes through the storage chamber 314 and is fixedly connected to the trigger block 309. A first spring 315 is fixedly connected between one side of the trigger block 309 and the inner wall of the storage chamber 314. Two symmetrically distributed mounting shells 311 are fixedly connected to the surface of the limit block 301. The mounting shells 311 are coaxially arranged with the adjacent adjustment rod 313. The other end of the adjustment rod 313 passes through the limit block 301 and the adjustment rod 313 in sequence and is fixedly connected to a sealing plate. Inert gas is filled between the interior of the mounting shell 311 and the sealing plate. The surface of the mounting shell 311 is connected to a conduit 312. The other end of the conduit 312 is connected to the adjacent sealing airbag 308.

[0042] Before the test begins, the core box 2 to be tested is placed on the test bench 1, and the motor 306 is started to drive the bidirectional screw rod 305 to rotate, so that the two limit blocks 301 can be driven to approach each other through the connecting rod 304. In this process, the core box 2 can be fixed inside the limit grooves 303 of the two limit blocks 301 to prevent the core box 2 from deviating during the test and affecting the connection effect of the combustion chamber 101. At the same time, when the two limit blocks 301 approach each other, the trigger block 309 can first contact the surface of the core box 2, and can squeeze the trigger block 309 under the obstruction of the core box 2. The block 309 drives the adjusting rod 313 to retract into the storage chamber 314 and squeezes the first spring 315 at the same time. During this process, the adjusting rod 313 can drive the sealing plate to squeeze the inert gas stored in the mounting shell 311. The squeezed inert gas is injected into the sealing airbag 308 through the conduit 312. Therefore, after the core box 2 is fixed in the limiting groove 303, the connection sealing between the two can be strengthened under the action of the sealing airbag 308 to avoid airflow leakage, thereby avoiding pressure relief caused by airflow leakage and improving the accuracy of the test.

[0043] like Figure 1 , Figure 2 , Figure 6 and Fig. 9 As shown, the purification mechanism 5 includes a purification box 501 arranged on one side of the test bench 1, the inner wall of the purification box 501 is fixedly connected with a partition 504, a dust reduction chamber is formed between one side of the partition 504 and the inner wall of the purification box 501, the inner wall of the dust reduction chamber is fixedly connected with a mounting plate 505, the surface of the mounting plate 505 is provided with evenly distributed vents, the bottom of the mounting plate 505 and the inside of the adjustment chamber are filled with dust reduction water, the other side of the partition 504 and the inner wall of the purification box 501 form a filter chamber, the inner wall of the filter chamber is fixedly connected with an activated carbon filter element 508, and the surface of the partition 504 is provided with a mounting plate. Tube 507, one end of the installation tube 507 is connected to the dust removal chamber, the other end of the installation tube 507 passes through the activated carbon filter 508 and extends to the bottom of the activated carbon filter 508, the top of the purification box 501 is provided with an exhaust pipe 509 connected to the purification box 501, the top of the purification box 501 is provided with a bellows 503, the lower end of the bellows 503 is fixedly connected with an introduction pipe 506, the lower end of the introduction pipe 506 passes through the purification box 501 and the installation plate 505 in sequence, the other end of the bellows 503 is connected with a connecting pipe 502, and the other end of the connecting pipe 502 is fixedly connected to the inner wall of the connecting hole;

[0044] The exhausted waste gas passes through the pressure regulating mechanism 4 and enters the interior of the connecting pipe 502, and is introduced into the interior of the dust suppression water through the bellows 503 and the introduction pipe 506. The dust suppression water can be used to treat the particulate matter in the waste gas. The waste gas entering the dust suppression water is separated from the dust suppression water in the form of bubbles and passes through the vent hole. It is then introduced to the bottom of the activated carbon filter 508 through the installation pipe 507. The activated carbon filter 508 adsorbs its harmful substances and odors and then discharges them through the exhaust pipe 509, reducing the pollution of the test waste gas to the environment.

[0045] When the present invention is used, the core box 2 to be tested is placed on the test bench 1, and the position of the core box 2 is limited and fixed under the action of the limiting mechanism 3. At the same time, the setting of the trigger block 309, the first spring 315, the adjusting rod 313, the sealing plate, the mounting shell 311 and the guide tube 312 can be used to swell the sealing airbag 308 during the limiting process, strengthen the connection sealing between the limiting block 301 and the core box 2 to avoid airflow leakage, thereby avoiding pressure relief caused by airflow leakage, improving the accuracy of the test, and being able to adjust the pressure during the test through the pressure regulating mechanism 4. The exhaust volume is regulated by changing the exhaust speed at one end of the exhaust to reduce the exhaust volume to adjust the internal pressure of the combustion chamber 101, so as to achieve the effect of steady flow test on the core box 2 under different pressure conditions. At the same time, the position of the rotating plate 404 can be limited by the mutual cooperation of the block 414, the slot 415, the second spring 416, the slider 413 and the pull block 407 to avoid unstable internal pressure of the combustion chamber 101 during the test. The purification mechanism 5 is used to purify and discharge the exhaust gas generated by the test to reduce pollution to the environment.

[0046] It should be noted that the injector 102 and the motor 306 in the above description are relatively mature devices in the existing technology. The specific model can be selected according to actual needs. At the same time, the injector 102 and the motor 306 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0047] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steady flow test device for an engine combustion system, characterized in that: include: A test bench (1), wherein a combustion chamber (101) is provided on the top of the test bench (1), a core box (2) is provided on the top of the test bench (1), and a fuel injector (102) connected to the combustion chamber (101) is provided on one side of the test bench (1); A limiting mechanism (3), the limiting mechanism (3) being arranged on the top of the test bench (1), and the limiting mechanism (3) being used for limiting and fixing the position of the core box (2); The limiting mechanism (3) comprises two limiting blocks (301) both arranged on the top of the test bench (1); limiting grooves (303) are provided on opposite sides of the two limiting blocks (301); a flow guide channel (310) connected to the limiting groove (303) is provided on the other side of the limiting block (301); and a flow guide pipe (302) connected to the flow guide channel (310) is provided on the surface of the limiting block (301); A pressure regulating mechanism (4), the pressure regulating mechanism (4) comprising a portion arranged on one side of the limit block (301), the pressure regulating mechanism (4) being arranged on one end of the flow guide tube (302) away from the limit block (301), the pressure regulating mechanism (4) being used to regulate the pressure inside the combustion chamber (101); A purification mechanism (5), wherein the purification mechanism (5) is arranged on one side of the test bench (1), and the purification mechanism (5) is used to purify and discharge the waste gas generated during the test process.

2. The engine combustion system steady flow test device according to claim 1, characterized in that: The pressure regulating mechanism (4) comprises a connecting block (401) arranged at one end of the flow guide tube (302); a connecting hole is provided on the surface of the connecting block (401); one end surface of the flow guide tube (302) is fixedly connected to the inner wall of the connecting hole; a baffle (402) is fixedly connected to the inner wall of one end of the flow guide tube (302) close to the connecting block (401); one side of the baffle (402) is flush with the end surface of the flow guide tube (302) away from the limit block (301); and a surface of the baffle (402) is provided with annularly distributed pressure regulating holes (403).

3. The engine combustion system steady flow test device according to claim 2, characterized in that: The inner wall of the connecting block (401) is fixedly connected to a protective shell (410), and the inner wall of the protective shell (410) is rotatably connected to a first cone wheel (411), one end of the first cone wheel (411) is fixedly connected to a connecting shaft, the other end of the connecting shaft passes through the protective shell (410) and is fixedly connected to a rotating plate (404), the other side of the rotating plate (404) is in contact with the surface of the baffle (402), and a through groove (405) corresponding to the pressure regulating hole (403) is provided on the surface of the rotating plate (404), the surface of the first cone wheel (411) is meshingly connected to a second cone wheel (412), and the top of the second cone wheel (412) is fixedly connected to a rotating shaft (409), and the upper end of the rotating shaft (409) passes through the protective shell (410) and the connecting block (401) in sequence and is fixedly connected to a rotating block (406) rotatably connected to the inner wall of the connecting block (401).

4. The engine combustion system steady flow test device according to claim 3, characterized in that: A pulling block (407) is arranged on the top of the rotating block (406), a sliding block (413) is fixedly connected to the bottom of the pulling block (407), the inner wall of the connecting block (401) is provided with evenly distributed card slots (415), one side of the sliding block (413) is fixedly connected to a card block (414), one end of the card block (414) passes through the rotating block (406) and extends to the inside of the adjacent card slot (415), and a second spring (416) is fixedly connected between the other side of the sliding block (413) and the inner wall of the rotating block (406).

5. The engine combustion system steady flow test device according to claim 4, characterized in that: An indicator line is provided on the surface of the connection block (401), and an indicator block (408) is fixedly connected to one side of the pull block (407).

6. The engine combustion system steady flow test device according to claim 1, characterized in that: The bottom of the limit block (301) is fixedly connected to two symmetrically distributed connecting rods (304); one side of the test bench (1) is fixedly connected to a guide rod (307); the two connecting rods (304) on one side are slidably connected to the surface of the guide rod (307); the other side of the test bench (1) is provided with a motor (306); the output shaft of the motor (306) is fixedly connected to a bidirectional screw rod (305); the two connecting rods (304) on the other side are threadedly connected to the surface of the bidirectional screw rod (305).

7. The engine combustion system steady flow test device according to claim 6, characterized in that: A sealing airbag (308) is embedded in the inner wall of the limiting groove (303), and two symmetrically distributed storage chambers (314) are opened on the inner wall of the limiting groove (303). An adjusting rod (313) is arranged inside the storage chamber (314), and one end of the adjusting rod (313) passes through the storage chamber (314) and is fixedly connected to a trigger block (309), and a first spring (315) is fixedly connected between one side of the trigger block (309) and the inner wall of the storage chamber (314).

8. The engine combustion system steady flow test device according to claim 7, characterized in that: The surface of the limit block (301) is fixedly connected with two symmetrically distributed mounting shells (311); the mounting shell (311) is coaxially arranged with the adjacent adjusting rod (313); the other end of the adjusting rod (313) sequentially passes through the limit block (301) and the adjusting rod (313) and is fixedly connected with a sealing plate; the interior of the mounting shell (311) and the sealing plate are filled with inert gas; the surface of the mounting shell (311) is connected with a conduit (312); the other end of the conduit (312) is connected with the adjacent sealing airbag (308).

9. The engine combustion system steady flow test device according to claim 2, characterized in that: The purification mechanism (5) comprises a purification box (501) arranged on one side of the test bench (1), the inner wall of the purification box (501) is fixedly connected with a partition (504), a dust reduction chamber is formed between one side of the partition (504) and the inner wall of the purification box (501), the inner wall of the dust reduction chamber is fixedly connected with a mounting plate (505), the surface of the mounting plate (505) is provided with evenly distributed ventilation holes, the bottom of the mounting plate (505) and the inside of the adjustment chamber are filled with dust reduction water, a filter chamber is formed between the other side of the partition (504) and the inner wall of the purification box (501), the inner wall of the filter chamber is fixedly connected with an activated carbon filter element (508), a mounting tube (507) is arranged on the surface of the partition (504), one end of the mounting tube (507) is connected to the dust reduction chamber, and the other end of the mounting tube (507) passes through the activated carbon filter element (508) and extends to the bottom of the activated carbon filter element (508).

10. The engine combustion system steady flow test device according to claim 9, characterized in that: An exhaust pipe (509) connected to the purification box (501) is arranged at the top of the purification box (501), and a bellows (503) is arranged at the top of the purification box (501). The lower end of the bellows (503) is fixedly connected to an introduction pipe (506), and the lower end of the introduction pipe (506) passes through the purification box (501) and the mounting plate (505) in sequence. The other end of the bellows (503) is connected to a connecting pipe (502), and the other end of the connecting pipe (502) is fixedly connected to the inner wall of the connecting hole.

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