A blow-by gas amount detection device and method for a hybrid drive rotor engine

Abstract

This invention relates to the field of engine performance testing technology, and discloses a device and method for detecting air leakage in a hybrid-driven rotary engine. The static testing device includes a testing mechanism and a sealed testing chamber. A heating mechanism and a vacuuming mechanism are located on one side of the testing chamber. The heating mechanism circulates heat inside the testing chamber, and the vacuuming mechanism evacuates the testing chamber and the inside of the rotary engine to a vacuum state. A partition is connected to the inner wall of the testing chamber, dividing the interior into a testing chamber and a placement chamber, where the rotary engine is placed. This invention uses a hydrogen-nitrogen mixed gas as the testing medium. For plug-in hybrid-driven rotary engines, this device can accurately identify minute sealing leaks caused by frequent operating condition switching, temperature, and mechanical shock, providing key testing support for optimizing the sealing performance and improving the reliability of this type of engine.

Description

Technical Field

[0001] This invention belongs to the field of engine performance testing technology, specifically relating to a device and method for detecting air leakage in a hybrid-drive rotary engine. Background Technology

[0002] The core of a triangular rotary engine is to complete four strokes—intake, compression, power, and exhaust—alternating within the cylinder through the eccentric rotation of the rotor. Its power output efficiency directly depends on the sealing of the cylinder. If the sealing gap between the rotor and the cylinder wall or end cover is too large, or if there is a small leak in the casing, it will cause high-pressure gas leakage during the power stroke, resulting in a loss of combustion energy. Therefore, it is necessary to test the leakage of the rotary engine to determine whether it can meet the usage requirements.

[0003] With the integration of new energy technologies and traditional internal combustion engine technologies, plug-in hybrid drive has become one of the important development directions for triangular rotor engines. Plug-in hybrid triangular rotor engines combine the advantages of both electric motor drive and rotor engine drive. They can store electrical energy through an external power source, switching to electric motor drive mode under low-speed and start-stop conditions, while the rotor engine dominates the drive under high-speed and high-load conditions, or both can work together to output power, thus achieving the dual goals of energy saving, emission reduction, and increased driving range. However, this drive form places higher demands on the sealing performance of the rotor engine: on the one hand, the start-stop frequency of the rotor engine in a plug-in hybrid system is significantly higher than that of a traditional internal combustion engine. Frequent switching of operating conditions leads to more frequent temperature changes and mechanical shocks to the cylinder block, rotor, and seals, easily exacerbating the generation and expansion of sealing gaps; on the other hand, the power coupling characteristics of the hybrid system require the rotor engine to maintain stable sealing even under intermittent operation. Even minor leaks can lead to decreased fuel economy, affect the precision of coordinated control between the electric motor and engine, and even cause safety hazards due to leaked gas contacting the electrical system.

[0004] However, in the field of sealing performance testing of triangular rotor engines, existing technologies generally use air as the test gas for related tests. Air molecules have poor permeability, making it difficult to quickly and accurately pass through tiny leak points in the engine. This results in low sensitivity for identifying tiny leaks, making it easy to miss detections and failing to meet the requirements for high-precision testing. Furthermore, air contains components such as oxygen and moisture. In the high-temperature testing environment simulating engine operation, oxygen may react with engine components to produce oxidation, while moisture may affect the accuracy of the air pressure sensor in the testing equipment. At the same time, air pressure stability is poor and is easily affected by changes in ambient temperature and humidity, leading to large fluctuations in test results and making it difficult to guarantee accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a static detection device with a simple structure and reasonable design in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions: This invention provides a leakage detection device for a hybrid-driven rotary engine, including a testing mechanism and a sealed testing chamber. A heating mechanism and a vacuuming mechanism are provided on one side of the testing chamber. The heating mechanism circulates heat inside the testing chamber, and the vacuuming mechanism evacuates the testing chamber and the inside of the rotary engine to a vacuum state. A partition is connected to the inner wall of the testing chamber, which divides the inside of the testing chamber into a testing chamber and a placement chamber. The rotary engine is placed in the placement chamber. A limit mechanism is provided on the partition to limit the rotation of the rotor in the rotary engine. The testing mechanism includes a mixed gas tank, a pressurizing pump, and a pressure stabilizing tank connected in sequence by pipes. The mixed gas tank is filled with a hydrogen-nitrogen mixed gas. The outlet of the pressure stabilizing tank is connected to a gas supply pipe one. The end of the gas supply pipe one away from the pressure stabilizing tank extends into the testing box and connects to the air inlet of the rotor engine. The outlet of the rotor engine is connected to a gas supply pipe two. The end of the gas supply pipe two away from the rotor engine is connected to the testing chamber. A pressure gauge one and a control valve are installed on the gas supply pipe one. Pressure gauge two are installed on the surface of the testing box at positions corresponding to the testing chamber and the placement chamber.

[0007] As a further optimization of the present invention, the testing box includes a box body and a box cover. The box cover is hinged to the upper end of the box body. After the box cover is closed on the upper end of the box body, the box body and the box cover are connected by bolts.

[0008] As a further optimization of the present invention, the inlet of the gas mixing tank is connected to a hydrogen tank and a nitrogen tank via a pipeline, and the hydrogen tank and the nitrogen tank respectively supply hydrogen and nitrogen into the gas mixing tank.

[0009] As a further optimization of the present invention, the heating mechanism includes a delivery pump, a hot air inlet pipe and a hot air outlet pipe. The outlet port of the delivery pump is connected to a heating box through a pipe. The heating box is connected to the placement cavity through the hot air inlet pipe. The inlet port of the delivery pump is connected to the placement cavity through the hot air outlet pipe. The heating box stores gas and is equipped with a heating wire.

[0010] As a further optimization of the present invention, the vacuum pumping mechanism includes a vacuum pump and a manifold. The inlet end of the vacuum pump is connected to the manifold. The manifold is connected to a first branch pipe, a second branch pipe, and a third branch pipe. The end of the first branch pipe away from the manifold is connected to the placement cavity. The end of the second branch pipe away from the manifold is connected to the first gas supply pipe. The end of the third branch pipe away from the manifold is connected to the detection cavity.

[0011] As a further optimization of the present invention, the gas transmission pipe includes a gas transmission section one and a gas transmission section two. One end of the gas transmission section one is connected to a pressure stabilizing tank, one end of the gas transmission section two is connected to the air inlet of the rotary engine, and the other end of the gas transmission section one extends into the placement cavity and is connected to the flange of the other end of the gas transmission section two. The second gas supply pipe includes a first supply section and a second supply section. One end of the first supply section is connected to the outlet of the rotary engine, and one end of the second supply section is connected to the flange of the other end of the first supply section. The other end of the second supply section extends through the partition into the detection chamber.

[0012] As a further optimization of the present invention, the limiting mechanism includes a rotating drum and a threaded rod. The rotating drum is threadedly connected to the surface of the threaded rod. The end of the rotating drum away from the threaded rod is rotatably connected to a partition plate. The end of the threaded rod away from the rotating drum is connected to a mounting plate. A movable rod is connected to the surface of the mounting plate. A fixed rod is slidably sleeved on the surface of the movable rod. The end of the fixed rod away from the movable rod is connected to the partition plate. A toothed block is connected to the side surface of the mounting plate away from the threaded rod. The toothed block meshes with the teeth on the outer side of the rotor engine flywheel.

[0013] As a further optimization of the present invention, a lifting mechanism is installed on the inner bottom surface of the placement cavity, and a lifting plate is connected to the driving end of the lifting mechanism. The lifting mechanism drives the lifting plate to slide along the inner wall of the placement cavity. The lifting mechanism includes symmetrically arranged lifting platforms, with two sets of lifting platforms connected to the inner bottom surface of the detection box and the lifting plate, respectively. Multiple scissor lift assemblies are arranged between the lifting platforms. Each scissor lift assembly consists of two outer rods and two inner rods connected by a central pin. An outer connecting shaft connects the two outer rods within each scissor lift assembly, and the outer connecting shaft is rotatably connected to the two inner rods within the adjacent scissor lift assembly. An inner connecting shaft connects the two inner rods within each scissor lift assembly, and the inner connecting shaft is rotatably connected to the two outer rods within the adjacent scissor lift assembly. The two outer rods in the lowest scissor lift assembly and the two inner rods in the highest scissor lift assembly are rotatably connected to the corresponding lifting platforms. Sliding rods are connected to the surfaces of the two inner rods in the lowest scissor lift assembly and the two outer rods in the highest scissor lift assembly. A sliding groove is formed on the surface of the lifting platform. The end of the sliding rod away from the scissor lift assembly passes through the corresponding sliding groove. A limit block is connected to the surface of the sliding rod away from the scissor lift assembly. The lifting mechanism also includes a movable plate, a driving bevel gear, a driven bevel gear, and a drive shaft. A spiral rod is installed on the lower lifting platform. The movable plate is threadedly connected to the surface of the spiral rod and slides along the surface of the lower lifting platform. The inner connecting shaft of the lower scissor lift assembly passes through the movable plate. The end of the spiral rod away from the movable plate is connected to the driven bevel gear. A fixing block is provided on the inner wall of the placement cavity. The lower end of the drive shaft passes through the fixing block and the lifting plate in sequence and is rotatably connected to the bottom surface of the placement cavity. The driving bevel gear is fixedly sleeved on the surface of the drive shaft and meshes with the driven bevel gear. A handle is connected to the upper end of the drive shaft.

[0014] As a further optimization of the present invention, a clamping mechanism is connected to the upper surface of the lifting plate. The clamping mechanism fixes the rotor engine on the lifting plate. The clamping mechanism includes a pressure plate and symmetrically arranged vertical plates. A screw is threadedly connected to the vertical plate. A transmission rod arranged vertically and horizontally is rotatably connected to the surface of each set of vertical plates. The ends of the two sets of transmission rods away from the vertical plates are rotatably connected to the pressure plate. A slider is slidably connected to the inner wall of the upper transmission rod. One end of the screw is rotatably connected to the surface of the slider, and the other end is connected to a handle.

[0015] A second aspect of the present invention provides a method for detecting air leakage in a hybrid-drive rotary engine, implemented by the aforementioned rotary engine air leakage detection device, comprising the following steps: S1. Open the test box cover, raise the lifting plate through the lifting mechanism, place the rotor engine on the lifting plate, start the clamping mechanism to fix the engine, and then reset the lifting plate. S2. Rotate the rotating drum of the limiting mechanism to make the toothed block mesh with the engine flywheel teeth to limit the rotation of the rotor. Then connect the first air supply pipe and the second air supply pipe to the engine's air inlet and outlet respectively to ensure the pipeline is sealed. Finally, close the box cover. S3. Start the heating mechanism to heat nitrogen gas through the heating wire and circulate it into the placement chamber to simulate the engine working temperature. After the temperature reaches the target, turn off the heating mechanism and control valve. S4. Start the vacuuming mechanism to evacuate the placement chamber, engine interior and detection chamber to a vacuum state through each shunt pipe. After the vacuuming is completed, close the shunt pipe valve. S5. Start the pressurization pump to send the hydrogen-nitrogen mixture from the mixing tank into the pressure stabilizing tank, open the control valve of the gas supply pipe one to introduce the mixture into the engine, and record the value of the gas pressure gauge one at the same time. S6. After the hydrogen-nitrogen mixture flows into the detection chamber through the engine outlet, the values ​​of two sets of pressure gauges are recorded. The air pressure values ​​of the placement chamber and the detection chamber are used to determine the leakage of the engine casing and the rotor and casing, and the leakage amount is calculated.

[0016] The beneficial effects of this invention are as follows: This invention uses a hydrogen-nitrogen mixed gas as the detection medium. Compared with air in the prior art, hydrogen has the characteristics of small molecular weight and extremely strong permeability, which can quickly penetrate the tiny leakage gaps at the joint between the engine casing or the rotor and the casing to quickly identify tiny leakage points. This solves the problem of missed detection of tiny leaks caused by the poor permeability of air. At the same time, nitrogen, as an inert gas, can effectively fill the gaps in the detection environment and form a stable gas background. When used in conjunction with hydrogen, it can clearly reflect the leakage path and leakage degree through gas pressure changes, which greatly improves the sensitivity and accuracy of detection. Especially for plug-in hybrid drive triangular rotor engines, this device can accurately identify tiny sealing leaks caused by frequent operating condition switching, temperature and mechanical shock, providing key detection support for optimizing the sealing performance and improving the reliability of this type of engine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the detection mechanism structure of the present invention; Figure 3 This is a schematic diagram of the partition structure of the present invention; Figure 4 This is a schematic diagram of the vacuum pumping mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the detection box of the present invention; Figure 6 This is a schematic diagram showing the connection between the limiting mechanism and the rotary engine of the present invention; Figure 7 This is a schematic diagram of the limiting mechanism structure of the present invention; Figure 8 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 9 This is a schematic diagram of the position of the movable plate of the present invention; Figure 10 This is a schematic diagram of the clamping mechanism structure of the present invention; Figure 11 This is a schematic diagram of the slider structure of the present invention.

[0018] In the diagram: 1. Testing box; 101. Box body; 102. Box cover; 2. Testing mechanism; 21. Mixed gas tank; 22. Pressurizing pump; 23. Pressure stabilizing tank; 24. Gas delivery pipe one; 241. Gas delivery section one; 242. Gas delivery section two; 25. Gas delivery pipe two; 251. Conveying section one; 252. Conveying section two; 26. Pressure gauge one; 27. Control valve; 28. Pressure gauge two; 29. ​​Hydrogen tank; 210. Nitrogen tank; 3. Heating mechanism; 31. Delivery pump; 32. Hot gas inlet pipe; 33. Hot gas outlet pipe; 34. Heating box; 35. Heating wire; 4. Vacuuming mechanism; 41. Vacuum pump; 42. Manifold; 43. Diverter pipe one; 44. Diverter pipe two; 45. Diverter pipe three; 5. 6. Partition plate; 6. Lifting mechanism; 61. Lifting platform; 62. Outer rod; 63. Inner rod; 64. Outer connecting shaft; 65. Inner connecting shaft; 66. Sliding rod; 67. Limiting block; 68. Moving plate; 69. Driving bevel gear; 610. Driven bevel gear; 611. Drive shaft; 612. Helical rotating rod; 613. Fixed block; 614. Handle one; 7. Lifting plate; 8. Clamping mechanism; 81. Pressure plate; 82. Vertical plate; 83. Screw; 84. Transmission rod; 85. Slider; 86. Handle two; 9. Detection chamber; 10. Placement chamber; 11. Limiting mechanism; 111. Rotary cylinder; 112. Threaded rod; 113. Mounting plate; 114. Moving rod; 115. Fixed rod; 116. Gear block. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example 1;

[0021] refer to Figure 1 and Figure 2 The structure shown is a leakage detection device for a hybrid-driven rotary engine, including a testing mechanism 2 and a sealed testing chamber 1. A heating mechanism 3 and a vacuuming mechanism 4 are provided on one side of the testing chamber 1. The heating mechanism 3 circulates heat inside the testing chamber 1, and the vacuuming mechanism 4 evacuates the testing chamber 1 and the inside of the rotary engine to a vacuum state. A partition 5 is connected to the inner wall of the testing chamber 1, which divides the inside of the testing chamber 1 into a testing chamber 9 and a placement chamber 10. The rotary engine is placed in the placement chamber 10. A limit mechanism 11 is provided on the partition 5 to limit the rotation of the rotor in the rotary engine. The testing mechanism 2 includes a mixed gas tank 21, a pressurizing pump 22, and a pressure stabilizing tank 23 connected in sequence by pipes. The mixed gas tank 21 is filled with a hydrogen-nitrogen mixed gas. The outlet of the pressure stabilizing tank 23 is connected to a gas supply pipe 24. The end of the gas supply pipe 24 away from the pressure stabilizing tank 23 extends into the testing box 1 and is connected to the air inlet of the rotor engine. The outlet of the rotor engine is connected to a gas supply pipe 25. The end of the gas supply pipe 25 away from the rotor engine is connected to the testing chamber 9. A pressure gauge 26 and a control valve 27 are installed on the gas supply pipe 24. Pressure gauges 28 are installed on the surface of the testing box 1 at positions corresponding to the testing chamber 9 and the placement chamber 10.

[0022] It should be noted that the sealing performance of a plug-in hybrid engine is directly related to the accuracy of the hybrid system's coordinated control and safety risks. At the coordinated control level, the power coupling between the engine and the motor requires a precise torque distribution algorithm. Even a minor leak in the engine can cause a deviation between the actual output torque and the control command, leading to power jerking and reduced energy recovery efficiency. At the safety risk level, the engine compartment integrates electrical components such as high-voltage batteries, motor controllers, and high-voltage wiring harnesses. If leaked gas (especially hydrogen or gasoline vapor) comes into contact with the electrical system, it could cause a short circuit, fire, or even an explosion. Therefore, plug-in hybrid engines have extremely low tolerance for sealing gaps. This invention can detect minute sealing leaks, precisely matching the operating characteristics, sealing requirements, environmental needs, and safety risks of plug-in hybrid engines. Of course, this invention can also perform sealing tests on rotary engines operating in a single fuel-driven mode.

[0023] In this embodiment, the high permeability of hydrogen is used as a tracer gas, combined with the safety characteristics of nitrogen, to design an engine airtightness test process. Specifically, because hydrogen has a small molecular weight and strong permeability, it can quickly pass through tiny leak points, while nitrogen, as a diluent gas, can reduce the risk of explosion and stabilize the pressure environment. Therefore, a hydrogen-nitrogen mixture (a mixture of hydrogen and nitrogen) is used as the detection gas for measuring the leakage of the rotary engine.

[0024] The recommended hydrogen concentration is 5%-10% (by volume), and the nitrogen concentration is 90%-95%. This ratio balances detection sensitivity and safety, avoiding the risk of explosion caused by excessive hydrogen concentration; control valve 27 is an electrically controlled valve.

[0025] In practical use, after the heating mechanism 3 circulates and heats the inside of the detection box 1, the vacuum mechanism 4 evacuates the detection box 1 and the inside of the rotor engine to a vacuum state. At this time, the pressurizing pump 22 is started to deliver the hydrogen-nitrogen mixture in the mixing tank 21 to the pressure stabilizing tank 23. Then, the control valve 27 is opened, and the hydrogen-nitrogen mixture in the pressure stabilizing tank 23 is delivered to the rotor engine through the first gas supply pipe 24. Then, the hydrogen-nitrogen mixture flows through the outlet of the rotor engine and through the second gas supply pipe 25 to the detection chamber 9. Finally, the values ​​of the first pressure gauge 26 and the two sets of second pressure gauges 28 are recorded. If there is a difference in the value of the second pressure gauge 28 used to measure the pressure in the placement chamber 10, it indicates that there is a leak in the rotor engine casing. Otherwise, there is no leak. The leak caused by the rotor not sealing the inner wall of the casing can be seen by the difference in the value of the first pressure gauge 26 and the second pressure gauge 28 corresponding to the detection chamber 9, and the amount of leakage of the mixture can be calculated.

[0026] Furthermore, the testing box 1 includes a box body 101 and a box cover 102. The box cover 102 is hinged to the upper end of the box body 101. After the box cover 102 is closed on the upper end of the box body 101, the box body 101 and the box cover 102 are connected by bolts.

[0027] Furthermore, the inlet of the gas mixing tank 21 is connected to a hydrogen tank 29 and a nitrogen tank 210 via a pipe, and the hydrogen tank 29 and the nitrogen tank 210 respectively supply hydrogen and nitrogen into the gas mixing tank 21.

[0028] refer to Figure 2 and Figure 3 The structure shown includes a heating mechanism 3 comprising a delivery pump 31, a hot air inlet pipe 32, and a hot air outlet pipe 33. The outlet port of the delivery pump 31 is connected to a heating box 34 via a pipe. The heating box 34 is connected to the placement chamber 10 via the hot air inlet pipe 32. The inlet port of the delivery pump 31 is connected to the placement chamber 10 via the hot air outlet pipe 33. The heating box 34 contains gas, and an electric heating wire 35 is provided on the heating box 34.

[0029] It should be noted that a temperature measuring instrument is installed inside the testing box 1 to monitor the temperature inside the box 101.

[0030] In actual use, the heating wire 35 heats the gas in the heating box 34, and the delivery pump 31 delivers the heated gas to the detection box 1 through the hot air inlet pipe 32. After the gas is heated to a certain temperature, the delivery pump 31 delivers the gas in the detection box 1 to the heating box 34 through the hot air outlet pipe 33, thereby circulating and heating the gas in the detection box 1.

[0031] The gas inside the heating chamber 34 is nitrogen. By introducing nitrogen, the oxygen content in the detection chamber 1 is reduced, thereby enhancing safety. The heating chamber 34 is equipped with an air inlet for supplying nitrogen.

[0032] Both the hot air inlet pipe 32 and the hot air outlet pipe 33 are equipped with electrically controlled valves, which are used to control the flow of gas in the hot air inlet pipe 32 and the hot air outlet pipe 33, respectively.

[0033] It should be noted that, since the engine operates at a certain temperature, this embodiment uses a heating mechanism 3 to heat the inside of the test chamber 1, thereby simulating the engine's operating environment.

[0034] refer to Figure 1 and Figure 4 The structure shown includes a vacuum pump 41 and a manifold 42. The inlet of the vacuum pump 41 is connected to the manifold 42. The manifold 42 is connected to a first branch pipe 43, a second branch pipe 44, and a third branch pipe 45. The end of the first branch pipe 43 away from the manifold 42 is connected to the placement cavity 10. The end of the second branch pipe 44 away from the manifold 42 is connected to the first gas supply pipe 24. The end of the third branch pipe 45 away from the manifold 42 is connected to the detection cavity 9.

[0035] It should be noted that when the test chamber 1 does not need to be heated again, the vacuum pump 41 evacuates the space inside the placement chamber 10, the rotor engine, and the test chamber 9 to a vacuum state through the first branch pipe 43, the second branch pipe 44, and the third branch pipe 45, respectively.

[0036] Among them, each of the three diversion pipes 43, 44, and 45 is equipped with an electrically controlled valve, which is used to control the flow of gas in the three diversion pipes 43, 44, and 45 respectively.

[0037] refer to Figure 3 and Figure 5 The structure shown includes a gas transmission pipe 24, which includes a gas transmission section 241 and a gas transmission section 242. One end of the gas transmission section 241 is connected to the pressure stabilizing tank 23, and one end of the gas transmission section 242 is connected to the air inlet of the rotary engine. The other end of the gas transmission section 241 extends into the placement cavity 10 and is connected to the flange at the other end of the gas transmission section 242. The second gas supply pipe 25 includes a first supply section 251 and a second supply section 252. One end of the first supply section 251 is connected to the outlet of the rotary engine, and one end of the second supply section 252 is connected to the flange at the other end of the first supply section 251. The other end of the second supply section 252 extends through the partition 5 into the detection chamber 9.

[0038] refer to Figure 6 and Figure 7The structure shown includes a limiting mechanism 11 comprising a rotating drum 111 and a threaded rod 112. The rotating drum 111 is threadedly connected to the surface of the threaded rod 112. The end of the rotating drum 111 away from the threaded rod 112 is rotatably connected to the partition plate 5. The end of the threaded rod 112 away from the rotating drum 111 is connected to a mounting plate 113. A movable rod 114 is connected to the surface of the mounting plate 113. A fixed rod 115 is slidably sleeved on the surface of the movable rod 114. The end of the fixed rod 115 away from the movable rod 114 is connected to the partition plate 5. A toothed block 116 is connected to the side surface of the mounting plate 113 away from the threaded rod 112. The toothed block 116 meshes with the teeth on the outside of the rotor engine flywheel.

[0039] Furthermore, a lifting mechanism 6 is installed on the inner bottom surface of the placement cavity 10. The driving end of the lifting mechanism 6 is connected to a lifting plate 7. The lifting mechanism 6 drives the lifting plate 7 to slide along the inner wall of the placement cavity 10. A clamping mechanism 8 is connected to the upper surface of the lifting plate 7. The clamping mechanism 8 fixes the rotor engine on the lifting plate 7.

[0040] In practical use, when it is necessary to measure the rotor engine, first open the cover 102, start the lifting mechanism 6 to raise the lifting plate 7, then place the rotor engine on the lifting plate 7, then start the clamping mechanism 8 to clamp the rotor engine and fix it, then start the lifting mechanism 6 again to drive the lifting plate 7 to reset. At this time, the rotor engine is located in the placement cavity 10. Then, the flanges of the first gas delivery section 241 and the second gas delivery section 242, as well as the first conveying section 251 and the second conveying section 252, which are close to each other are connected by bolts and nuts. Then, rotate the rotating drum 111, so that the threaded rod 112 drives the mounting plate 113 and the tooth block 116 to move closer to the rotor engine, so that the tooth block 116 meshes with the teeth on the outside of the rotor engine flywheel, thereby limiting the rotation of the rotor.

[0041] The combination of the fixed rod 115 and the movable rod 114 can restrict the rotation of the threaded rod 112.

[0042] In this embodiment, the lifting mechanism 6 is any kind of manual lifting mechanism, specifically, it can be a manual screw lifting platform or a hand-cranked scissor lifting platform, and the clamping mechanism 8 is a manual clamp.

[0043] Example 2;

[0044] This embodiment is a further improvement on the first embodiment, and provides the specific structure of the lifting mechanism 6 and the clamping mechanism 8; For details, please refer to Figure 8 and Figure 9The structure shown includes a lifting mechanism 6 comprising two symmetrically arranged lifting platforms 61. The two lifting platforms 61 are connected to the inner bottom surface of the detection box 1 and the lifting plate 7, respectively. Multiple scissor lift assemblies are arranged between the lifting platforms 61. Each scissor lift assembly consists of two outer rods 62 and two inner rods 63 connected by a central pin. An outer connecting shaft 64 connects the two outer rods 62 within each scissor lift assembly. The outer connecting shaft 64 is rotatably connected to the two inner rods 63 within the adjacent scissor lift assembly. An inner connecting shaft 65 connects the two inner rods 63 within each scissor lift assembly. The inner shaft 65 is rotatably connected to the two outer rods 62 in the adjacent scissor lift assembly. The two outer rods 62 in the lowermost scissor lift assembly and the two inner rods 63 in the uppermost scissor lift assembly are rotatably connected to the corresponding lifting platform 61. The surfaces of the two inner rods 63 in the lowermost scissor lift assembly and the two outer rods 62 in the uppermost scissor lift assembly are all connected to sliding rods 66. The surface of the lifting platform 61 is provided with a sliding groove. The end of the sliding rod 66 away from the scissor lift assembly passes through the sliding groove on the corresponding side. The surface of the sliding rod 66 away from the scissor lift assembly is connected to a limit block 67. The lifting mechanism 6 also includes a movable plate 68, a driving bevel gear 69, a driven bevel gear 610, and a drive shaft 611. A spiral rod 612 is threaded through the lower lifting platform 61. The movable plate 68 is threaded to the surface of the spiral rod 612 and slides along the surface of the lower lifting platform 61. The inner connecting shaft 65 in the lower scissor assembly passes through the movable plate 68. The end of the spiral rod 612 away from the movable plate 68 is connected to the driven bevel gear 610. A fixing block 613 is provided on the inner wall of the placement cavity 10. The lower end of the drive shaft 611 passes through the fixing block 613 and the lifting plate 7 in sequence and is rotatably connected to the bottom surface of the placement cavity 10. The driving bevel gear 69 is fixedly sleeved on the surface of the drive shaft 611. The driving bevel gear 69 meshes with the driven bevel gear 610. A handle 614 is connected to the upper end of the drive shaft 611.

[0045] The sliding rod 66 is cylindrical, so it can rotate within the groove.

[0046] In actual use, the rotating drive shaft 611 drives the active bevel gear 69 to rotate, the active bevel gear 69 drives the driven bevel gear 610 to rotate, the driven bevel gear 610 drives the spiral rod 612 to rotate, thereby driving the moving plate 68 to move. Due to the setting of the scissor lift assembly, the upper lifting platform 61 drives the lifting plate 7 to move.

[0047] Further reference Figure 10 and Figure 11The structure shown includes a clamping mechanism 8 comprising a pressure plate 81 and symmetrically arranged vertical plates 82. A screw 83 is threaded onto the vertical plate 82. Each set of vertical plates 82 is rotatably connected to a transmission rod 84 arranged vertically and horizontally. The ends of the two sets of transmission rods 84 away from the vertical plate 82 are rotatably connected to the pressure plate 81. A slider 85 is slidably connected to the inner wall of the upper transmission rod 84. One end of the screw 83 is rotatably connected to the surface of the slider 85, and the other end is connected to a handle 86.

[0048] Specifically, the upper surface of the lifting plate 7 can be provided with a groove that fits against the surface of the rotary engine to prevent the rotary engine from being damaged.

[0049] In actual use, the rotor engine needs to be placed between the symmetrically arranged vertical plates 82. By rotating the screw 83, the screw 83 moves closer to the rotor engine. With the cooperation of the transmission rod 84, the pressure plate 81 will press against the surface of the rotor engine, thereby clamping the rotor engine.

[0050] It should be noted that the surface of the pressure plate 81 is fitted to the surface of the rotary engine.

[0051] Example 3;

[0052] A method for detecting air leakage in a hybrid-drive rotary engine, implemented by the rotary engine air leakage detection device in Embodiment 1 or Embodiment 2, includes the following steps: S1. Open the test box cover, raise the lifting plate through the lifting mechanism, place the rotor engine on the lifting plate, start the clamping mechanism to fix the engine, and then reset the lifting plate. S2. Rotate the rotating drum of the limiting mechanism to make the toothed block mesh with the engine flywheel teeth to limit the rotation of the rotor. Then connect the first air supply pipe and the second air supply pipe to the engine's air inlet and outlet respectively to ensure the pipeline is sealed. Finally, close the box cover. S3. Start the heating mechanism to heat nitrogen gas through the heating wire and circulate it into the placement chamber to simulate the engine working temperature. After the temperature reaches the target, turn off the heating mechanism and control valve. S4. Start the vacuuming mechanism to evacuate the placement chamber, engine interior and detection chamber to a vacuum state through each shunt pipe. After the vacuuming is completed, close the shunt pipe valve. S5. Start the pressurization pump to send the hydrogen-nitrogen mixture from the mixing tank into the pressure stabilizing tank, open the control valve of the gas supply pipe one to introduce the mixture into the engine, and record the value of the gas pressure gauge one at the same time. S6. After the hydrogen-nitrogen mixture flows into the detection chamber through the engine outlet, the values ​​of two sets of pressure gauges are recorded. The air pressure values ​​of the placement chamber and the detection chamber are used to determine the leakage of the engine casing and the rotor and casing, and the leakage amount is calculated.

[0053] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A leakage detection device for a hybrid-drive rotary engine, characterized in that, The device includes a testing mechanism and a sealed testing chamber. A heating mechanism and a vacuuming mechanism are provided on one side of the testing chamber. The heating mechanism circulates heat inside the testing chamber, and the vacuuming mechanism evacuates the testing chamber and the rotor engine to a vacuum state. A partition is connected to the inner wall of the testing chamber, which divides the inside of the testing chamber into a testing chamber and a placement chamber. The rotor engine is placed in the placement chamber. A limit mechanism is provided on the partition to limit the rotation of the rotor in the rotor engine. The testing mechanism includes a mixed gas tank, a pressurizing pump, and a pressure stabilizing tank connected in sequence by pipes. The mixed gas tank is filled with a hydrogen-nitrogen mixed gas. The outlet of the pressure stabilizing tank is connected to a gas supply pipe one. The end of the gas supply pipe one away from the pressure stabilizing tank extends into the testing box and connects to the air inlet of the rotor engine. The outlet of the rotor engine is connected to a gas supply pipe two. The end of the gas supply pipe two away from the rotor engine is connected to the testing chamber. A pressure gauge one and a control valve are installed on the gas supply pipe one. Pressure gauge two are installed on the surface of the testing box at positions corresponding to the testing chamber and the placement chamber.

2. A blow-by gas amount detecting device for a hybrid drive rotor engine according to claim 1, characterized by: The testing box includes a box body and a box cover. The box cover is hinged to the upper end of the box body. After the box cover is closed on the upper end of the box body, the box body and the box cover are connected by bolts.

3. A blow-by gas amount detecting device for a hybrid drive rotor engine according to claim 2, characterized by: The gas inlet of the gas mixing tank is connected to a hydrogen tank and a nitrogen tank via a pipe, and the hydrogen tank and the nitrogen tank respectively supply hydrogen and nitrogen into the gas mixing tank.

4. The leakage detection device for a hybrid-drive rotary engine according to claim 2, characterized in that: The heating mechanism includes a delivery pump, a hot air inlet pipe, and a hot air outlet pipe. The outlet port of the delivery pump is connected to a heating box via a pipe. The heating box is connected to the placement chamber via the hot air inlet pipe. The inlet port of the delivery pump is connected to the placement chamber via the hot air outlet pipe. The heating box contains gas, and an electric heating wire is installed on the heating box.

5. The leakage detection device for a hybrid-drive rotary engine according to claim 2, characterized in that: The vacuum pumping mechanism includes a vacuum pump and a manifold. The inlet of the vacuum pump is connected to the manifold. The manifold is connected to a first branch pipe, a second branch pipe, and a third branch pipe. The end of the first branch pipe away from the manifold is connected to the placement cavity. The end of the second branch pipe away from the manifold is connected to the first gas supply pipe. The end of the third branch pipe away from the manifold is connected to the detection cavity.

6. The leakage detection device for a hybrid-drive rotary engine according to claim 2, characterized in that: The gas transmission pipe includes a first gas transmission section and a second gas transmission section. One end of the first gas transmission section is connected to a pressure stabilizing tank, one end of the second gas transmission section is connected to the air inlet of the rotary engine, and the other end of the first gas transmission section extends into the placement cavity and is connected to the flange of the other end of the second gas transmission section. The second gas supply pipe includes a first supply section and a second supply section. One end of the first supply section is connected to the outlet of the rotary engine, and one end of the second supply section is connected to the flange of the other end of the first supply section. The other end of the second supply section extends through the partition into the detection chamber.

7. The leakage detection device for a hybrid-drive rotary engine according to claim 2, characterized in that: The limiting mechanism includes a rotating drum and a threaded rod. The rotating drum is threadedly connected to the surface of the threaded rod. The end of the rotating drum away from the threaded rod is rotatably connected to a partition plate. The end of the threaded rod away from the rotating drum is connected to a mounting plate. A movable rod is connected to the surface of the mounting plate. A fixed rod is slidably sleeved on the surface of the movable rod. The end of the fixed rod away from the movable rod is connected to the partition plate. A toothed block is connected to the side surface of the mounting plate away from the threaded rod. The toothed block meshes with the teeth on the outer side of the rotor engine flywheel.

8. The leakage detection device for a hybrid-drive rotary engine according to claim 2, characterized in that: A lifting mechanism is installed on the inner bottom surface of the placement cavity. The driving end of the lifting mechanism is connected to a lifting plate, and the lifting mechanism drives the lifting plate to slide along the inner wall of the placement cavity. The lifting mechanism includes symmetrically arranged lifting platforms, with two sets of lifting platforms connected to the inner bottom surface of the detection box and the lifting plate, respectively. Multiple scissor lift assemblies are arranged between the lifting platforms. Each scissor lift assembly consists of two outer rods and two inner rods connected by a central pin. An outer connecting shaft connects the two outer rods within each scissor lift assembly, and the outer connecting shaft is rotatably connected to the two inner rods within the adjacent scissor lift assembly. An inner connecting shaft connects the two inner rods within each scissor lift assembly, and the inner connecting shaft is rotatably connected to the two outer rods within the adjacent scissor lift assembly. The two outer rods in the lowest scissor lift assembly and the two inner rods in the highest scissor lift assembly are rotatably connected to the corresponding lifting platforms. Sliding rods are connected to the surfaces of the two inner rods in the lowest scissor lift assembly and the two outer rods in the highest scissor lift assembly. A sliding groove is formed on the surface of the lifting platform. The end of the sliding rod away from the scissor lift assembly passes through the corresponding sliding groove. A limit block is connected to the surface of the sliding rod away from the scissor lift assembly. The lifting mechanism also includes a movable plate, a driving bevel gear, a driven bevel gear, and a drive shaft. A spiral rod is installed on the lower lifting platform. The movable plate is threadedly connected to the surface of the spiral rod and slides along the surface of the lower lifting platform. The inner connecting shaft of the lower scissor lift assembly passes through the movable plate. The end of the spiral rod away from the movable plate is connected to the driven bevel gear. A fixing block is provided on the inner wall of the placement cavity. The lower end of the drive shaft passes through the fixing block and the lifting plate in sequence and is rotatably connected to the bottom surface of the placement cavity. The driving bevel gear is fixedly sleeved on the surface of the drive shaft and meshes with the driven bevel gear. A handle is connected to the upper end of the drive shaft.

9. The leakage detection device for a hybrid-drive rotary engine according to claim 8, characterized in that: The upper surface of the lifting plate is connected to a clamping mechanism, which fixes the rotor engine on the lifting plate. The clamping mechanism includes a pressure plate and symmetrically arranged vertical plates. A screw is threadedly connected to the vertical plate. Each set of vertical plates is rotatably connected to a transmission rod arranged vertically and horizontally. The ends of the two sets of transmission rods away from the vertical plates are rotatably connected to the pressure plate. A slider is slidably connected to the inner wall of the upper transmission rod. One end of the screw is rotatably connected to the surface of the slider, and the other end is connected to a handle.

10. A method for detecting air leakage in a hybrid-drive rotary engine, implemented by the rotary engine air leakage detection device according to any one of claims 1-9, comprising the following steps: S1. Open the test box cover, raise the lifting plate through the lifting mechanism, place the rotor engine on the lifting plate, start the clamping mechanism to fix the engine, and then reset the lifting plate. S2. Rotate the rotating drum of the limiting mechanism to make the toothed block mesh with the engine flywheel teeth to limit the rotation of the rotor. Then connect the first air supply pipe and the second air supply pipe to the engine's air inlet and outlet respectively to ensure the pipeline is sealed. Finally, close the box cover. S3. Start the heating mechanism to heat nitrogen gas through the heating wire and circulate it into the placement chamber to simulate the engine working temperature. After the temperature reaches the target, turn off the heating mechanism and control valve. S4. Start the vacuuming mechanism to evacuate the placement chamber, engine interior and detection chamber to a vacuum state through each shunt pipe. After the vacuuming is completed, close the shunt pipe valve. S5. Start the pressurization pump to send the hydrogen-nitrogen mixture from the mixing tank into the pressure stabilizing tank, open the control valve of the gas supply pipe one to introduce the mixture into the engine, and record the value of the gas pressure gauge one at the same time. S6. After the hydrogen-nitrogen mixture flows into the detection chamber through the engine outlet, the values ​​of two sets of pressure gauges are recorded. The air pressure values ​​of the placement chamber and the detection chamber are used to determine the leakage of the engine casing and the rotor and casing, and the leakage amount is calculated.

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