A device for simulating droplet evaporation of high pressure induction fuel of an internal combustion engine

Abstract

The application discloses a kind of liquid drop evaporation test devices of simulating high-pressure induced fuel of internal combustion engine, applied to fuel evaporation test equipment field, the application is added liquid fuel to the inside of oil storage tank, opens oil injection pump and extracts the liquid fuel in the inside of oil storage tank to the inside of oil injection pipe, then the fuel in the inside of oil injection pipe is made to sink by gravity and single drop is dropped from the inside of acute angle pipe mouth, at this time, the liquid fuel in the inside of oil injection pipe is again pumped back to the inside of oil storage tank for storage by opening oil storage tank, and single drop liquid fuel is retained on the setting above quartz hanging wire, the purpose that fuel can be single liquid drop evaporation under high pressure environment is achieved, so as to keep the pressure inside sealed transparent sphere, improve the precision of single liquid drop generation evaporation test.

Description

Technical Field

[0001] This invention belongs to the technical field of fuel evaporation test equipment, and specifically relates to a droplet evaporation test device for simulating high-pressure fuel ejection in an internal combustion engine. Background Technology

[0002] With the increasing scarcity of fossil fuels and the pressure of environmental protection, energy conservation and emission reduction have become core concepts in the environmental policies and regulations formulated by governments worldwide. Driven by this concept, researchers in the engine field have successively proposed advanced engine technologies such as advanced turbocharging, high-pressure injection, and optimized combustion. When internal combustion engines apply these advanced engine technologies, they invariably generate higher in-cylinder temperatures and pressures. Changes in the in-cylinder environment alter the fuel evaporation and fuel-air mixing processes. Therefore, it is necessary to develop technologies for the fuel evaporation process under the complex high-temperature, high-pressure environment in the cylinder. Generally, the morphological changes and evaporation rate of fuel droplets have a significant impact on their application. Fuels with different evaporation characteristics injected into the engine combustion chamber will exhibit different combustion characteristics due to their different evaporation rates.

[0003] Currently, Chinese invention patent CN107748221A discloses a droplet evaporation test device, including an imaging system, a heating device, and a micro-injector. The heating device includes a heating coil with a through-hole at its top. The micro-injector extends into the heating coil through the through-hole without contacting the inner wall of the heating coil. The micro-injector is suspended on an iron frame. A temperature regulator is installed inside the heating device to adjust the temperature inside the heating coil. The imaging system includes a high-speed camera and a diffuse light source. The high-speed camera is located on one side of the heating coil and is used to image the droplets generated by the micro-injector. The diffuse light source is located on the other side of the heating coil. It also includes a pressure chamber and a pressurization system. This invention can more realistically simulate the evaporation of fuel in a combustion chamber through the heating device and pressure chamber, solving the problem of droplet evaporation under high temperature and high pressure conditions in the combustion chamber.

[0004] Existing evaporation devices are fixed-droplet evaporation test devices, which use an aluminum plate to heat the droplets. These devices can only be used to study the evaporation of fixed droplets. Single-droplet evaporation test devices mainly use a hanging droplet method to generate single droplets. During the experiment, the experimenter needs to artificially generate and suspend the droplets using a micro-syringe, and then send the suspended droplets into a high-temperature environment. However, artificially generating and suspending droplets is not possible under high pressure, thus hindering the study of single-droplet evaporation under high pressure. Furthermore, the high-speed cameras used in existing evaporation tests are generally fixed in one position. During fuel evaporation tests in a sealed chamber, the effects of fuel combustion and evaporation are significant, easily resulting in unstable and inaccurate images, making post-observation difficult. Moreover, the inability to film the evaporation test from a 360-degree angle results in a single data angle, making comparative analysis impossible. Therefore, we propose a droplet evaporation test device that simulates high-pressure fuel injection in an internal combustion engine. Summary of the Invention

[0005] The purpose of this invention is to provide a test device for simulating the droplet evaporation of fuel under high pressure in an internal combustion engine. Its advantages are that it can realize the evaporation of fuel into single droplets under high pressure, can capture the evaporation test from 360 degrees around the camera, and can improve the stability and fineness of the images captured by the high-speed camera.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a test device for simulating the droplet evaporation of fuel injected under high pressure in an internal combustion engine, comprising a test chamber, an installation platform bolted to the bottom of the test chamber, an evaporation test component disposed inside the test chamber, a transmission mechanism disposed inside the installation platform, and a recording mechanism disposed on the top of the transmission mechanism in cooperation with the evaporation test component.

[0007] By employing the above technical solution, liquid fuel is added to the oil storage tank, and the injection pump is activated to draw the liquid fuel from the tank into the injection pipe. Gravity causes the fuel inside the injection pipe to sink and drip out as a single drop from the acute-angled opening. The tank is then reactivated to draw the remaining liquid fuel from the injection pipe back into the storage tank for storage. The single drop of fuel remains on the quartz wire, achieving single-droplet evaporation under high pressure. This maintains the pressure inside the sealed transparent sphere, improving the accuracy of the single-droplet evaporation test. By activating the drive motor to rotate the bevel gear, which meshes with the transmission gear, the transmission gear rotates axially. This allows the displacement turntable to freely rotate the annular slider and electric telescopic rod within the annular groove, enabling a high-speed camera to capture 360-degree panoramic views of the evaporation test. This allows for multi-angle filming, increasing the diversity of experimental data. The electronic gyroscope controls the roll motor to drive the second connecting piece to make a corresponding roll rotation angle, while the pitch motor controls the pitch motor to drive the third connecting piece to make a corresponding pitch rotation angle. The horizontal motor also controls the horizontal motor to drive the high-speed camera to make a corresponding horizontal rotation angle. This allows the high-speed camera to rotate in opposite directions to counteract the effects of the experiment or the shaking caused by movement. This achieves the function of improving the stability and detail of the images captured by the high-speed camera, making the captured images clearer and more observable, and easier for the test personnel to observe.

[0008] The present invention is further configured such that: the evaporation test assembly includes a sealed transparent sphere disposed inside a test chamber; an igniter fixedly connected to the test chamber is fixedly connected to the bottom of the inner cavity of the sealed transparent sphere; an oil storage tank is disposed on the top of the test chamber; an oil injection pump bolted to the test chamber is fixedly connected to the bottom of the oil storage tank; an oil injection pipe fixedly connected to the sealed transparent sphere is fixedly connected to the bottom of the oil injection pump; an acute-angled pipe opening connected to the sealed transparent sphere is fixedly connected to the bottom of the oil injection pipe; an air inlet valve and a pressure relief valve are fixedly connected to the top two sides of the test chamber respectively; a pressure pump bolted to the test chamber is fixedly connected inside the air inlet valve; connecting rods are fixedly connected to both sides of the inner cavity of the sealed transparent sphere; and quartz hanging wires are fixedly connected to the side of the two connecting rods that are close to each other.

[0009] By adopting the above technical solution, fuel can be evaporated into single droplets under high pressure, thus improving the accuracy of single droplet generation and evaporation tests.

[0010] The present invention is further configured such that: the transmission mechanism includes a mounting shell bolted to one side of the mounting platform, a drive motor is bolted inside the mounting shell, a bevel gear is linked to the output end of the drive motor via a coupling, and a transmission gear rotatably connected to the mounting platform is engaged on the side of the bevel gear away from the drive motor.

[0011] Using the above technical solution, the high-speed camera can capture evaporation experiments from a 360-degree perspective, improving the diversity of experimental data.

[0012] The invention is further configured such that: the recording mechanism includes a displacement turntable fixedly connected to the top of the transmission gear; an annular groove is provided on the top of the mounting platform; an annular slider is rotatably disposed within the annular groove; an electric telescopic rod is mounted on the annular slider; the displacement turntable is drively connected to the annular slider; a first connecting member is fixedly connected to the output end of the electric telescopic rod; a rolling motor is fixedly installed inside the first connecting member; a second connecting member is linked to the output end of the rolling motor via a coupling; a pitch motor is fixedly installed inside the second connecting member; a third connecting member is linked to the output end of the pitch motor via a coupling; a horizontal motor is fixedly installed inside the third connecting member; an electronic gyroscope is linked to the output end of the horizontal motor via a coupling; and a high-speed camera is fixedly mounted on the top of the electronic gyroscope.

[0013] By adopting the above technical solution, the stability and detail of the images captured by the high-speed camera are improved, making it easier for test personnel to observe.

[0014] The present invention is further configured such that: a first support rod is provided at the bottom of the installation platform, a second support rod is rotatably connected to the installation platform through an internal thread of the first support rod, and a lifting turntable is welded to the surface of the second support rod.

[0015] By adopting the above technical solution, the first support rod is rotated inside the second support rod by rotation control, thereby enabling the first support rod to drive the installation platform to rise and fall, allowing for free adjustment according to the height of the test personnel.

[0016] The present invention is further configured such that: an extended base plate is welded to the bottom of the first support rod, and omnidirectional wheels are fixedly installed at the four corners of the bottom of the extended base plate.

[0017] The above technical solution facilitates the movement of the test device and improves its flexibility.

[0018] The present invention is further configured such that: the interior of the extended base plate is threadedly connected to a limiting turntable that is threadedly connected to the first support rod, and both the limiting turntable and the lifting turntable have anti-slip textures on their surfaces.

[0019] Using the above technical solution, the test device can be fixed by rotating the limiting turntable to make it fit the ground.

[0020] The invention is further configured such that: a heat dissipation hole for use with the drive motor is provided on the side of the mounting shell away from the mounting platform; a protective net is fixedly installed inside the heat dissipation hole; and a sealing ring bonded to the mounting platform is slidably connected to the top of the displacement turntable.

[0021] By adopting the above technical solution, the drive motor can be ventilated and cooled by setting heat dissipation holes while preventing dust and debris from entering. The gap between the displacement turntable and the installation platform can be blocked by setting a sealing ring, thereby improving the sealing performance of the installation platform.

[0022] The present invention is further configured such that: a through hole is provided at the bottom of the annular groove, a gear is rotatably disposed in the through hole, a first annular rack is coaxially fixed on the lower side of the annular slider, a second annular rack is coaxially fixed on the upper side of the displacement turntable, and the gear extends out of the through hole and meshes with the first annular rack and the second annular rack respectively.

[0023] By adopting the above technical solution, the second ring rack is driven to rotate by the turntable, and then the first ring rack and the ring slider are driven to rotate by the gear. This enables the high-speed camera to capture the evaporation experiment from all directions as needed, thereby improving the diversity of the test data.

[0024] The present invention is further configured such that: the inner wall of the test chamber is filled with sound-insulating cotton padding, the front of the test chamber is provided with an installation door, and the four corners of the installation door are threaded with installation bolts that are threaded with the test chamber; and an observation window is fixedly installed inside the installation door.

[0025] By adopting the above technical solution, the noise of the test can be reduced by setting sound insulation pads, the internal equipment can be replaced and repaired by removing the installation door from the test chamber, and the test can be observed visually by setting an observation window when the installation door is installed on the test chamber.

[0026] In summary, the present invention has the following beneficial effects:

[0027] By adding liquid fuel into the oil storage tank and turning on the oil pump to draw the liquid fuel from the oil storage tank into the oil injection pipe, the fuel inside the oil injection pipe sinks under gravity and drips out as a single drop from the inside of the acute-angled pipe opening. At this time, the oil storage tank is turned on again to draw back the liquid fuel that participated in the oil injection pipe and transport it back into the oil storage tank for storage. The single drop of liquid fuel will remain on the quartz hanging wire. This design achieves the purpose of fuel evaporation in a single droplet under high pressure, thereby maintaining the pressure inside the sealed transparent sphere and improving the accuracy of the single droplet generation evaporation test.

[0028] By turning on the drive motor to rotate the bevel gear, the bevel gear meshes with the transmission gear and drives the transmission gear to rotate axially. This allows the displacement turntable to move the annular slider and the electric telescopic rod to freely rotate within the annular groove. This enables the high-speed camera to capture the evaporation experiment from 360 degrees, allowing for multi-angle shooting and improving the diversity of experimental data.

[0029] The electronic gyroscope controls the roll motor to drive the second connecting piece to make a corresponding roll rotation angle, while the pitch motor controls the pitch motor to drive the third connecting piece to make a corresponding pitch rotation angle. The horizontal motor also controls the horizontal motor to drive the high-speed camera to make a corresponding horizontal rotation angle. This allows the high-speed camera to rotate in opposite directions to counteract the effects of the experiment or the shaking caused by movement. This achieves the function of improving the stability and detail of the images captured by the high-speed camera, making the captured images clearer and more observable, and easier for the test personnel to observe. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 2 This is a partial three-dimensional structural cross-sectional view of the present invention;

[0032] Figure 3 This is a partial front sectional view of the structure of the present invention;

[0033] Figure 4 This is a partial structural side sectional view of the present invention;

[0034] Figure 5 This is the invention Figure 3 Enlarged view of point A in the image;

[0035] Figure 6 This is the invention Figure 3 Enlarged view of point B in the image.

[0036] Attached reference numerals: 1. Test chamber; 2. Mounting platform; 3. First support rod; 4. Second support rod; 5. Extension base plate; 6. Casters; 7. Limiting turntable; 8. Lifting turntable; 10. Protective net; 11. Sealing ring; 12. Sound insulation pad; 13. Sealing cover; 14. Mounting door; 15. Mounting bolt; 16. Observation window; 17. Filter cotton; 101. Displacement turntable; 102. Annular groove; 103. Electric telescopic rod; 104. First connecting piece; 105. Rolling motor; 106. Second connecting piece; 107. Tilting motor; 108. Third connecting piece; 109. 110. Horizontal motor; 111. Electronic gyroscope; 112. High-speed camera; 201. Sealed transparent sphere; 202. Igniter; 203. Intake valve; 204. Pressure relief valve; 205. Oil tank; 206. Oil injection pump; 207. Pressurization pump; 208. Oil injection pipe; 209. Acute-angled pipe opening; 210. Connecting rod; 211. Quartz hanging wire; 301. Transmission gear; 302. Drive motor; 303. Bevel gear; 304. Mounting shell; 401. Annular slider; 402. First annular rack; 403. Through hole; 404. Gear; 405. Second annular rack. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings. Example 1:

[0038] refer to Figure 1 , Figure 3 , Figure 5 A test device for simulating the droplet evaporation of fuel under high pressure in an internal combustion engine includes a test chamber 1, a mounting platform 2 bolted to the bottom of the test chamber 1, an evaporation test component inside the test chamber 1, a transmission mechanism inside the mounting platform 2, and a recording mechanism on the top of the transmission mechanism that works in conjunction with the evaporation test component. Liquid fuel is added to the oil storage tank 205, and the oil pump 206 is turned on to draw the liquid fuel from the oil storage tank 205 into the oil injection pipe 208. Then, gravity causes the fuel inside the oil injection pipe 208 to sink and drip out as a single drop from the acute-angled pipe opening 209. At this point, the oil storage tank 205 is turned on again to draw back the liquid fuel from the oil injection pipe 208 and store it inside the oil storage tank 205. The single drop of liquid fuel remains on the quartz hanging wire 211, achieving the purpose of single-droplet evaporation of fuel under high pressure, thereby maintaining the pressure inside the sealed transparent sphere 201 and improving the accuracy of the single-droplet generation evaporation test.

[0039] refer to Figure 1 , Figure 3 , Figure 5The evaporation test assembly includes a sealed transparent sphere 201 housed inside a test chamber 1. An igniter 202, fixedly connected to the test chamber 1, penetrates and is fixedly connected to the bottom of the inner cavity of the sealed transparent sphere 201. An oil storage tank 205 is located on the top of the test chamber 1. An oil injection pump 206, bolted to the test chamber 1, is fixedly connected to the bottom of the oil storage tank 205. An oil injection pipe 208, penetrating and fixedly connected to the sealed transparent sphere 201, is fixedly connected to the bottom of the oil injection pump 206. The bottom of the oil injection pipe 208 is also fixedly connected to the sealed transparent sphere 201. The transparent sphere 201 is connected to an acute-angled tube 209. An air inlet valve 203 and a pressure relief valve 204 are fixedly connected to the top of the test chamber 1 on both sides. The air inlet valve 203 is fixedly connected to a pressure pump 207 bolted to the test chamber 1. Connecting rods 210 are fixedly connected to both sides of the inner cavity of the sealed transparent sphere 201. Quartz wires 211 are fixedly connected to the side of the two connecting rods 210 that are close to each other. This allows the fuel to evaporate into single droplets under high pressure, improving the accuracy of the single droplet generation and evaporation test.

[0040] refer to Figure 1 , Figure 2 The bottom of the installation platform 2 is provided with a first support rod 3. The first support rod 3 is internally threaded to a second support rod 4 that is rotatably connected to the installation platform 2. A lifting turntable 8 is welded to the surface of the second support rod 4. By rotating the turntable, the first support rod 3 can be controlled to rotate inside the second support rod 4, thereby allowing the first support rod 3 to drive the installation platform 2 to rise and fall, which can be freely adjusted according to the height of the test personnel.

[0041] refer to Figure 1 , Figure 2 An extension base plate 5 is welded to the bottom of the first support rod 3. Universal wheels 6 are fixedly installed at the four corners of the bottom of the extension base plate 5 to facilitate the movement of the test device and improve its flexibility.

[0042] refer to Figure 1 , Figure 2 The inner part of the extended base plate 5 is threaded with a limiting turntable 7 that is threaded with the first support rod 3. The surfaces of the limiting turntable 7 and the lifting turntable 8 are both provided with anti-slip texture. By rotating the limiting turntable 7 to make it fit the ground, the test device can be fixed.

[0043] refer to Figure 1 , Figure 3 The top of the oil storage tank 205 is threaded with a sealing cap 13. The top of the air inlet valve 203 and the pressure relief valve 204 are both fixedly installed with filter cotton 17. By opening the sealing cap 13, liquid fuel can be added to the inside of the oil storage tank 205. Closing it can prevent dust and debris from entering. By setting the filter cotton 17, dust and debris can be prevented from entering from the air inlet valve 203. At the same time, it can absorb the tar and soot discharged from the inside of the pressure relief valve 204.

[0044] Brief description of the usage process: When single-droplet evaporation of fuel is required under high pressure, liquid fuel is first added to the oil storage tank 205. The oil injection pump 206 is then turned on to draw the liquid fuel from the oil storage tank 205 into the oil injection pipe 208. Then, gravity causes the fuel inside the oil injection pipe 208 to sink and drip out as a single drop from the acute-angle pipe opening 209. At this point, the oil storage tank 205 is turned on again to draw back the liquid fuel from the oil injection pipe 208 and return it to the oil storage tank 205 for storage. The single droplet of liquid fuel will remain inside the storage tank. The liquid fuel is suspended on the quartz wire 211 and supported by the sealed transparent sphere 201 and the quartz wire 211. Then, the liquid fuel is burned and evaporated by turning on the igniter 202. The pressurization pump 207 is turned on to transfer outside air from the air intake valve 203 to the inside of the sealed transparent sphere 201 to continuously supply oxygen for the liquid combustion. Finally, after the test is completed, the igniter 202 is turned off and the pressure relief valve 204 is turned on to allow the exhaust gas inside the sealed transparent sphere 201 to be discharged under the continuous pressure injection from the air intake valve 203 by the pressurization pump 207. Example 2:

[0045] refer to Figure 1 , Figure 3 , Figure 4 , Figure 6 An experimental device for simulating the droplet evaporation of fuel under high pressure in an internal combustion engine includes a test chamber 1. A mounting platform 2 is bolted to the bottom of the test chamber 1. An evaporation test assembly is installed inside the test chamber 1. A transmission mechanism is installed inside the mounting platform 2. A recording mechanism, which works in conjunction with the evaporation test assembly, is installed on the top of the transmission mechanism. By activating a drive motor 302, a bevel gear 303 is driven to rotate, meshing with a transmission gear 301 and driving the transmission gear 301 to rotate axially. This causes the displacement turntable 101 and the second annular rack 405 to rotate. Through a gear 404 in a through hole 403, the first annular rack 402 and the annular slider 401 rotate, allowing the electric telescopic rod 103 to freely rotate along the annular groove 102. This enables a high-speed camera to capture evaporation tests from 360 degrees, allowing for multi-angle shooting and improving the diversity of experimental data. The electronic gyroscope 110 controls the roll motor 105 to drive the second connecting member 106 to make a corresponding roll rotation angle, while controlling the pitch motor 107 to drive the third connecting member 108 to make a corresponding pitch rotation angle, and controlling the horizontal motor 109 to drive the high-speed camera 111 to make a corresponding horizontal rotation angle. This allows the high-speed camera 111 to rotate in opposite directions to counteract the effects of the experiment or the shaking caused by movement, thereby improving the stability and detail of the images captured by the high-speed camera. This makes the captured images clearer and more visible, making it easier for the test personnel to observe.

[0046] refer to Figure 1 , Figure 3 The transmission mechanism includes a mounting shell 304 bolted to one side of the mounting platform 2. A drive motor 302 is bolted inside the mounting shell 304. The output end of the drive motor 302 is linked to a bevel gear 303 via a coupling. The side of the bevel gear 303 away from the drive motor 302 is engaged with a transmission gear 301 that is rotatably connected to the mounting platform 2. The high-speed camera can capture the evaporation test from 360 degrees, improving the diversity of test data.

[0047] refer to Figure 3 , Figure 4 , Figure 6 The recording mechanism includes a displacement turntable 101 fixedly connected to the top of the transmission gear 301. An annular groove 102 is formed on the top of the mounting platform 2. An annular slider 401 is rotatably disposed within the annular groove 102. An electric telescopic rod 103 is mounted on the annular slider 401. The displacement turntable 101 is connected to the annular slider 401 via a transmission connection. A first connecting member 104 is fixedly connected to the output end of the electric telescopic rod 103. A rolling motor 105 is fixedly installed inside the first connecting member 104. The output end of the rolling motor 105 is connected to… A second connecting member 106 is connected via a coupling. A pitch motor 107 is fixedly installed inside the second connecting member 106. The output end of the pitch motor 107 is connected to a third connecting member 108 via a coupling. A horizontal motor 109 is fixedly installed inside the third connecting member 108. The output end of the horizontal motor 109 is connected to an electronic gyroscope 110 via a coupling. A high-speed camera 111 is fixedly installed on the top of the electronic gyroscope 110 to improve the stability and detail of the images captured by the high-speed camera, making it easier for test personnel to observe.

[0048] refer to Figure 1 , Figure 3 The mounting housing 304 has a heat dissipation hole on the side away from the mounting platform 2, which is used in conjunction with the drive motor 302. A protective net 10 is fixedly installed inside the heat dissipation hole. A sealing ring 11 that is bonded to the mounting platform 2 is slidably connected to the top of the displacement turntable 101. By setting the heat dissipation hole, the drive motor 302 can be ventilated and cooled while preventing dust and debris from entering. By setting the sealing ring 11, the gap between the displacement turntable 101 and the mounting platform 2 can be blocked, thereby improving the sealing performance of the mounting platform 2.

[0049] refer to Figure 1 , Figure 3The inner wall of the test chamber 1 is filled with sound-insulating cotton pads 12. The front of the test chamber 1 is provided with an installation door 14. The four corners of the installation door 14 are threaded with installation bolts 15 that are threaded with the test chamber 1. An observation window 16 is fixedly installed inside the installation door 14. The sound-insulating cotton pads 12 can reduce the noise of the test. The internal equipment can be replaced and repaired by removing the installation door 14 from the test chamber 1. The observation window 16 makes it easy to observe the test with the naked eye when the installation door 14 is installed on the test chamber 1.

[0050] Brief description of usage: When a high-speed camera is needed to capture a 360-degree panoramic view of the evaporation experiment and to improve the stability and detail of the captured image, the drive motor 302 is first activated to rotate the bevel gear 303. This causes the bevel gear 303 to mesh with the transmission gear 301, driving the transmission gear 301 to rotate axially. This causes the displacement turntable 101 and the second annular rack 405 to rotate coaxially. The gear 404 then drives the first annular rack 402 on the annular slider 401 to rotate, allowing the electric telescopic rod 103 to freely rotate along the annular groove 102 to set its position. This is achieved electronically... The gyroscope 110 detects the direction and intensity of the shaking of the high-speed camera 111 caused by the test or movement. Then, it controls the roll motor 105 to drive the second connecting member 106 to make a corresponding roll rotation angle, and at the same time controls the pitch motor 107 to drive the third connecting member 108 to make a corresponding pitch rotation angle. It also controls the horizontal motor 109 to drive the high-speed camera 111 to make a corresponding horizontal rotation angle. This allows the high-speed camera 111 to rotate in opposite directions to counteract the shaking caused by the test or movement. The height of the high-speed camera 111 can be adjusted by extending and retracting the electric telescopic rod 103.

Claims

1. A test apparatus for simulating the droplet evaporation of fuel ejected under high pressure in an internal combustion engine, comprising a test chamber (1), characterized in that: The bottom of the test chamber (1) is bolted with an installation platform (2), the interior of the test chamber (1) is equipped with an evaporation test assembly, the interior of the installation platform (2) is equipped with a transmission mechanism, and the top of the transmission mechanism is equipped with a recording mechanism that works in conjunction with the evaporation test assembly. The transmission mechanism includes a mounting shell (304) bolted to one side of the mounting platform (2). A drive motor (302) is bolted inside the mounting shell (304). A bevel gear (303) is linked to the output end of the drive motor (302) through a coupling. A transmission gear (301) that is rotatably connected to the mounting platform (2) is engaged on the side of the bevel gear (303) away from the drive motor (302). The recording mechanism includes a displacement turntable (101) fixedly connected to the top of the transmission gear (301). An annular groove (102) is provided on the top of the mounting platform (2). An annular slider (401) is rotatably disposed within the annular groove (102). An electric telescopic rod (103) is mounted on the annular slider (401). The displacement turntable (101) is connected to the annular slider (401) via a transmission connection. A first connecting member (104) is fixedly connected to the output end of the electric telescopic rod (103). A rolling motor (104) is fixedly installed inside the first connecting member (104). 05), the output end of the rolling motor (105) is linked to the second connecting member (106) through a coupling. The second connecting member (106) is fixedly installed with a pitch motor (107). The output end of the pitch motor (107) is linked to the third connecting member (108) through a coupling. The third connecting member (108) is fixedly installed with a horizontal motor (109). The output end of the horizontal motor (109) is linked to an electronic gyroscope (110) through a coupling. The top of the electronic gyroscope (110) is fixedly installed with a high-speed camera (111).

2. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 1, characterized in that: The evaporation test assembly includes a sealed transparent sphere (201) disposed inside the test chamber (1). An igniter (202) fixedly connected to the test chamber (1) is fixedly connected to the bottom of the inner cavity of the sealed transparent sphere (201). An oil storage tank (205) is disposed on the top of the test chamber (1). An oil injection pump (206) bolted to the test chamber (1) is fixedly connected to the bottom of the oil storage tank (205). An oil injection pipe (208) fixedly connected to the bottom of the oil injection pump (206) is fixedly connected to the sealed transparent sphere (201). The bottom of the oil injection pipe (208) is fixedly connected to the acute-angle port (209) connected to the sealed transparent sphere (201). The top of the test chamber (1) is fixedly connected to the air inlet valve (203) and the pressure relief valve (204) respectively. The air inlet valve (203) is fixedly connected to the pressure pump (207) bolted to the test chamber (1). The inner sides of the sealed transparent sphere (201) are fixedly connected to the connecting rods (210). The two connecting rods (210) are fixedly connected to the quartz hanging wire (211) on the side of the two connecting rods (210) that are close to each other.

3. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 1, characterized in that: The bottom of the installation platform (2) is provided with a first support rod (3), and the first support rod (3) is internally threaded to a second support rod (4) that is rotatably connected to the installation platform (2). A lifting turntable (8) is welded to the surface of the second support rod (4).

4. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 3, characterized in that: The bottom of the first support rod (3) is welded with an extension base plate (5), and the four corners of the bottom of the extension base plate (5) are fixedly installed with casters (6).

5. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 4, characterized in that: The extension base plate (5) has a through threaded connection to a limiting turntable (7) that is threaded to the first support rod (3). The surfaces of the limiting turntable (7) and the lifting turntable (8) are both provided with anti-slip textures.

6. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 1, characterized in that: The mounting shell (304) has a heat dissipation hole on the side away from the mounting platform (2) that works in conjunction with the drive motor (302). A protective net (10) is fixedly installed inside the heat dissipation hole. A sealing ring (11) that is bonded to the mounting platform (2) is slidably connected to the top of the displacement turntable (101).

7. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 6, characterized in that: The bottom of the annular groove (102) is provided with a through hole (403), and a gear (404) is rotatably disposed in the through hole (403). The lower side of the annular slider (401) is coaxially fixed with a first annular rack (402), and the upper side of the displacement turntable (101) is coaxially fixed with a second annular rack (405). The gear (404) extends out of the through hole (403) and meshes with the first annular rack (402) and the second annular rack (405) respectively.

8. The droplet evaporation test apparatus for simulating high-pressure ejected fuel in an internal combustion engine according to claim 1, characterized in that: The inner wall of the test chamber (1) is filled with sound insulation cotton pads (12). The front of the test chamber (1) is provided with an installation door (14). The four corners of the installation door (14) are threaded with installation bolts (15) that are threaded with the test chamber (1). An observation window (16) is fixedly installed inside the installation door (14).

Images