Engine altitude cabin power testing device

Abstract

The invention discloses an engine altitude cabin power testing device, which comprises an altitude cabin, a dynamometer and a power output device, an engine is fixed on a mounting seat in the cabin, and the power of the engine is transmitted to the dynamometer outside the cabin through a transmission shaft via the power output device, so that the dynamometer is prevented from being influenced by the environment in the cabin; the power output device is of a sealing structure with a static pressure cavity, high vacuum in the cavity is maintained through a vacuum pump, dynamic sealing of a main shaft is achieved through an airflow barrier, friction and abrasion are avoided, the service life is long, precision is high, linear and lifting motion modules are further integrated, and engine installation and butt joint with the power output device are facilitated. And the butt joint driving mechanism assists the transmission shaft spline coupling to be automatically aligned and engaged, so that the butt joint efficiency and the sealing performance are improved.

Description

Technical Field

[0001] This invention relates to the field of engine testing equipment technology, specifically an engine altitude chamber power testing device. Background Technology

[0002] Engine altitude chamber testing simulates the high-altitude environment of 3000-6000 meters to test various performance indicators of the engine under high-altitude conditions. Due to the airtightness requirements of the chamber, the existing engine altitude chamber test structure directly installs both the dynamometer and the engine under test inside the altitude chamber. This means that the dynamometer also operates in a high-altitude environment, resulting in a service life far shorter than its design life, a high failure rate, and high maintenance costs. Although the dynamometer can be installed outside the altitude chamber to ensure its service life, ensuring the airtightness of the power connection between the dynamometer and the engine is a challenge of existing technology. Summary of the Invention

[0003] In view of the above-mentioned shortcomings in the existing technology, the purpose of this invention is to provide a testing device with a low overall failure rate and reduced manual operation, thereby accelerating testing efficiency.

[0004] The technical solution adopted by the present invention to achieve the above objectives is: an engine altitude chamber power testing device, including an altitude chamber, a dynamometer, and a power output device. The bottom surface of the altitude chamber is provided with an installation platform, a mounting base is fixedly connected to the installation platform, an engine is fixedly connected to the mounting base, the dynamometer is fixedly connected to the outside of the altitude chamber, the power output device is fixedly connected to the chamber wall, the power output end of the engine is poweredly connected to the power output device through a transmission shaft, and the power output device is poweredly connected to the dynamometer through a connecting shaft. The power output device includes a bearing housing and a transmission main shaft rotatably connected to the bearing housing. A static pressure chamber is provided between the transmission main shaft and the bearing housing. Sealing rings are provided on both sides of the static pressure chamber between the transmission main shaft and the bearing housing. Bearings are fixedly connected to both ends of the bearing housing. The transmission main shaft cooperates with the bearings. A balance chamber is provided between the bearings and the sealing rings. A balance air passage is provided on the bearing housing that communicates with the balance chamber. One set of the balance air passages communicates with the interior of the altitude chamber, and another set of the balance air passages communicates with the exterior of the altitude chamber. A balance pipe is connected to the static pressure chamber. A vacuum pump is connected to the balance pipe. One end of the transmission main shaft is poweredly connected to the transmission shaft, and the other end is poweredly connected to the connecting shaft.

[0005] In the above technical solution, the specific structure of the power output device is as follows: The power output device further includes a mounting housing, a sealing connecting sleeve, a power output coupling, and a power input coupling. The sealing connecting sleeve is fixedly connected to the mounting housing and is fixedly connected to the cabin wall. The bearing seat is fixedly connected to the sealing connecting sleeve and is fixedly connected to the altitude chamber. The balance pipe is fixedly connected to the sealing connecting sleeve. A vacuum passage is provided inside the bearing seat and communicates with the static pressure chamber. The balance pipe communicates with the vacuum passage. One end of the drive shaft is fixedly connected to the power input coupling, which is poweredly connected to the drive shaft. The other end of the drive shaft is fixedly connected to the power output coupling, which is poweredly connected to the drive shaft.

[0006] In one embodiment, the installation platform is provided with a linear motion module, which includes a horizontal motion platform. The horizontal motion platform is provided with a lifting motion module, which includes a lifting motion platform. The mounting base is fixedly connected to the lifting motion platform. One end of the drive shaft is fixedly connected to the power output end of the engine, and the other end is provided with a spline portion. The power input coupling is matched with the spline portion by a spline sleeve shaft. The linear motion module and the lifting motion module can drive the engine to move, so that the spline portion is inserted into the power input coupling.

[0007] In the above embodiments, in order to reduce the driving source and reduce the failure rate, the lifting motion module includes a power input mechanism, and the mounting platform is equipped with a power generating component in cooperation with the power input mechanism. When the linear motion module drives the power input mechanism to move linearly, the power input mechanism cooperates with the power generating component to realize the lifting motion of the lifting motion platform.

[0008] In the above embodiments, the linear motion module adopts the following structure: The linear motion module further includes a guide rail, a reduction gearbox, a first lead screw, and a first drive motor. The guide rail is fixedly connected to the mounting platform, and the horizontal motion table is slidably connected to the guide rail. The first lead screw is threadedly connected to the horizontal motion table. The reduction gearbox is fixedly connected to the mounting platform, and the power output end of the reduction gearbox is poweredly connected to the first lead screw. The first drive motor is fixedly connected to the outside of the mounting platform, and the first drive motor is poweredly connected to the power input end of the reduction gearbox. Furthermore, the lifting motion module adopts the following structure: The lifting motion module also includes a guide column and a second lead screw. The guide column is fixedly connected to the horizontal motion platform, and the lifting motion platform is slidably connected to the guide column. The second lead screw is threadedly connected to the lifting motion platform. The power input mechanism is provided on the horizontal motion platform, and the power input mechanism is poweredly connected to the second lead screw.

[0009] In the above embodiments, the power input mechanism adopts the following structure: The power input mechanism includes a worm, a worm wheel, and a gear. The bottom end of the second lead screw is fixedly connected to the worm wheel. The worm is rotatably connected to the horizontal motion table. The worm meshes with the worm wheel. A gear is fixedly connected to the worm. The power generating component is matched with the gear by using a rack.

[0010] In another embodiment, the following optimizations are made to facilitate the docking of the engine with the power output device: A docking drive mechanism is provided on the outer wall of the altitude chamber near the power output device, and the docking drive mechanism is poweredly connected to the transmission shaft.

[0011] In the above embodiments, the docking drive mechanism adopts the following structure: The docking drive mechanism includes a mounting frame, a first gear, a second gear, a second drive motor, and an output shaft. The mounting frame is fixedly connected to the cabin wall, the second drive motor is fixedly connected to the mounting frame, the second drive motor is powered by the output shaft, the first gear is fixedly connected to the output shaft, and the second gear is fixedly connected to the connecting shaft. The first gear and the second gear are meshed together.

[0012] In another embodiment, to avoid the docking drive mechanism affecting the test results, the output shaft component is selected with the following structure: The output shaft component includes a main sleeve shaft, a telescopic shaft, and a first spring. The main sleeve shaft is rotatably connected to the mounting frame and is poweredly connected to the second drive motor. The main sleeve shaft has a moving cavity with a spline groove inside. A spline strip is fixedly connected to the telescopic shaft and slidably connected to the spline groove. The first spring is fixedly connected to the moving cavity and is fixedly connected to the telescopic shaft. The first gear is fixedly connected to the telescopic shaft. Furthermore, a pusher is provided on the cabin wall in conjunction with the first gear, and a pusher frame is provided on the mounting base corresponding to the pusher. When the mounting base moves linearly, the pusher frame can push the pusher linearly, and the pusher can push the first gear to move linearly, so that the first gear and the second gear are misaligned.

[0013] In the above embodiments, the pushing member is selected with the following structure: The pushing component includes a motion shaft, a pushing head, a second spring, and a sealing platform. The motion shaft is slidably connected to the cabin wall, and a sealing sleeve is provided between the motion shaft and the cabin wall. The pushing head is fixedly connected to the outer end of the motion shaft, and the pushing head abuts against the first gear. A limiting platform is fixedly connected to the outer area of ​​the motion shaft, and the second spring is sleeved on the motion shaft. One end of the second spring is fixedly connected to the limiting platform, and the other end is fixedly connected to the cabin wall. The sealing platform is fixedly connected to the inner area of ​​the motion shaft, and a sealing ring is provided on the sealing platform. After the pushing head pushes the first gear and the second gear to misalign, the sealing ring abuts against the inner wall of the cabin wall.

[0014] The beneficial effects of this invention are: 1. By placing the dynamometer outside the altimeter chamber, the impact of the internal environment of the altimeter chamber on the dynamometer can be reduced, thereby reducing dynamometer malfunctions and extending the service life of the dynamometer. 2. The dynamometer and the engine are connected by a power output device. A static pressure chamber is provided between the drive shaft of the power output device and the bearing housing. The static pressure chamber is connected to a vacuum pump through a balance pipe. The vacuum pump can extract the air in the static pressure chamber, which can actively maintain the negative pressure in the chamber, effectively prevent the exchange of gases between the inside and outside of the altitude chamber, ensure the airtightness of the altitude chamber, and improve the testing accuracy. At the same time, the setting of the balance chamber can avoid the negative pressure from affecting the bearing and ensure the bearing's airtightness. 3. The engine is fixedly connected to a drive shaft, and the drive shaft is connected to the power input coupling in the power output device by a spline connection. The linear motion module can drive the engine to perform linear motion, so that the drive shaft and the power input coupling can be automatically connected and reliably transmit power. This structure can reduce manual operation of power connection, speed up testing efficiency, and the first drive motor of the linear motion module is located outside the altitude chamber, which can avoid the environment inside the altitude chamber from affecting the service life of the first drive motor. 4. A lifting motion module is provided on the horizontal motion platform, and the mounting base is fixedly connected to the lifting motion platform. The height of the mounting base can be adjusted through the lifting motion module, so that the engine is installed or removed at a lower height, which is convenient for operation and improves installation efficiency. 5. The lifting motion module works in conjunction with the power input mechanism and the power generation component. When the linear motion module drives the engine to move toward the power output device, the lifting motion module drives the generator to rise until it reaches the predetermined position. This can make full use of the power of the first drive motor, reduce the number of drive sources, and avoid having drive motors in the altitude cabin, thus making the failure rate of the entire device low. 6. The connecting shaft is equipped with a docking drive mechanism. When the transmission shaft is docked with the power input coupling, if the spline part does not match the spline sleeve shaft, the docking drive mechanism can drive the connecting shaft to rotate so that the two match, thereby reducing manual operation. 7. The output shaft in the docking drive mechanism is telescopic. When the linear motion module drives the mounting base to move linearly and dock the spline part with the spline sleeve shaft, the pusher can push the pusher. The pusher pushes the first gear and the second gear to misalign, so the engine output power will not be transmitted to the second drive motor. This avoids interference of the docking drive mechanism with the engine test and ensures the test accuracy. Attached Figure Description

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the power output device in this invention; Figure 3 This is a structural diagram of the linear motion module and the lifting motion module in this invention; Figure 4 This is a schematic diagram of the docking drive mechanism in this invention; Figure 5 This is a schematic diagram of the linear motion module and the lifting motion module in this invention; Figure 6 for Figure 5 Detailed structural diagram of part a; Figure 7 This is a schematic diagram of the structure of the transmission shaft and the power input coupling in this invention when they are not connected; Figure 8 This is a schematic diagram of the structure after the drive shaft and the power input coupling are connected in this invention; Figure 9 for Figure 8 Detailed structural diagram of part b in the middle; Figure 10 for Figure 7 Detailed structural diagram of the middle C section; Figure 11 This is an exploded structural diagram of the output shaft component in this invention.

[0016] In the image: 100-altitude cabin, 101 installation platform, 102 installation base; 200 dynamometer; 300 Power take-off device, 301 Mounting housing, 302 Sealing connection sleeve, 303 Bearing housing, 304 Transmission main shaft, 305 Static pressure chamber, 306 Sealing ring, 307 Bearing, 308 Balance chamber, 309 Balance air passage, 310 Vacuum air passage, 311 Balance pipe, 312 Power input coupling, 313 Power output coupling; 400 drive shaft, 401 spline section; 500 connecting shaft; 600 Linear motion module, 601 Guide rail, 602 Horizontal motion table, 603 Gearbox, 604 First lead screw, 605 First drive motor; 700 Lifting motion module, 701 Guide column, 702 Lifting motion table, 703 Second lead screw, 704 Power input mechanism, 7041 Worm gear, 7042 Worm wheel, 7043 Gear, 705 Power generating component; 800 docking drive mechanism, 801 mounting frame, 802 first gear, 803 second gear, 804 second drive motor, 805 output shaft, 8051 main sleeve shaft, 8052 telescopic shaft, 8053 first spring, 8054 motion cavity, 8055 spline groove, 8056 spline strip; 900 Pusher component, 901 Motion shaft, 902 Push head, 903 Second spring, 904 Sealing platform; 1000 push frame. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 See also Figure 1 , Figure 2 An engine altitude chamber power testing device includes an altitude chamber 100, a dynamometer 200, and a power output device 300. An installation platform 101 is provided on the bottom surface of the altitude chamber 100, and a mounting base 102 is fixedly connected to the installation platform 101. An engine is fixedly connected to the mounting base 102. Furthermore, the dynamometer 200 is fixedly connected to the outside of the altitude chamber 100, and the power output device 300 is fixedly connected to the chamber wall of the altitude chamber 100. The engine's power output end is poweredly connected to the power output device 300 via a drive shaft 400, and the power output device 300 is poweredly connected to the dynamometer 200 via a connecting shaft 500. Thus, the engine's power is transmitted to the dynamometer 200 via the power output device 300, allowing the dynamometer 200 to test the engine's performance. The dynamometer 200 is located outside the altitude chamber 100, thus avoiding prolonged exposure inside the altitude chamber 100, reducing the likelihood of dynamometer malfunctions, and extending the service life of the dynamometer 200. In addition, to ensure the airtightness of the altitude chamber 100, in this embodiment, the power output device 300 includes a mounting housing 301, a sealing connecting sleeve 302, a bearing seat 303, and a transmission main shaft 304. That is, the sealing connecting sleeve 302 is fixedly connected to the mounting housing 301, the mounting housing 301 is fixedly connected to the chamber wall, and the mounting housing 301 and the chamber cavity are sealed by a flexible sealing ring 306. The bearing seat 303 is fixedly connected to the sealing connecting sleeve 302, the bearing seat 303 is fixedly connected inside the altitude chamber 100, and the transmission main shaft 304 is rotatably connected inside the bearing seat 303. A static pressure chamber 305 is provided between the transmission main shaft 304 and the bearing seat 303. Furthermore, sealing rings 306 are provided on both sides of the static pressure chamber 305 between the transmission main shaft 304 and the bearing housing 303. Bearings 307 are fixedly connected to both ends of the bearing housing 303. The transmission main shaft 304 cooperates with the bearings 307. A balance chamber 308 is provided between the bearings 307 and the sealing rings 306. A balance air passage 309 is provided on the bearing housing 303 and communicates with the balance chamber 308. One set of balance air passages 309 communicates with the interior of the altitude chamber 100, and the other set of balance air passages 309 communicates with the exterior of the altitude chamber 100. Furthermore, a vacuum passage 310 is provided inside the bearing housing 303 and communicates with the static pressure chamber 305. A balance pipe 311 is fixedly connected to the sealing connection sleeve 302. The balance pipe 311 communicates with the vacuum passage 310 and is also connected to a vacuum pump. When the power output device 300 with the above structure is used, one end of the transmission main shaft 304 is poweredly connected to the transmission shaft 400, and the other end is poweredly connected to the connecting shaft 500. Specifically, one end of the transmission main shaft 304 is fixedly connected to a power input coupling 312, which is poweredly connected to the transmission shaft 400, and the other end of the transmission main shaft 304 is fixedly connected to a power output coupling 313, which is poweredly connected to the transmission shaft 400. In this way, the engine can drive the transmission main shaft 304 to rotate through the transmission shaft 400, and then the transmission main shaft 304 transmits the power to the dynamometer 200 through the connecting shaft 500. When the vacuum pump continues to operate, it can extract the gas from the static pressure chamber 305, maintaining it in a high vacuum state that is lower than the air pressure inside the altitude chamber 100. This is because the pressure (P_static) inside the static pressure chamber 305 is the lowest among the three regions (P_atmosphere > P_altitude_chamber_100). >P static), the gas will naturally flow from the high-pressure area to this lowest-pressure cavity. That is to say, the outside air will attempt to leak into the static pressure cavity 305 through the gap in the bearing housing 303, and the gas in the altitude chamber 100 will also attempt to leak into the static pressure cavity 305 through the gap on the other side. These two opposing airflows converge in the static pressure cavity 305 and are drawn away by the vacuum pump. This is equivalent to replacing the traditional physical seal between the drive shaft 304 and the bearing housing 303 with an invisible barrier formed by the "inflowing airflow". As long as the pumping rate of the vacuum pump is greater than the leakage rate on both sides, it can effectively prevent the gas from passing through the static pressure cavity 305, thereby achieving a seal. This structure can improve the sealing performance of the power output device 300. Moreover, when the drive shaft 304 rotates, it has no physical contact with the structure of the static pressure cavity 305. Therefore, there is no friction, no wear, no heat generation, and no consumption of engine power, which greatly improves the sealing life and testing accuracy. In addition, the balance chambers 308 on both sides of the bearing housing 303 are respectively connected to the balance air passages 309. In this way, the inner balance chamber 308 is connected to the interior of the altitude chamber 100 through the balance air passages 309, and the outer balance chamber 308 is connected to the outside atmosphere through the balance air passages 309. Therefore, the pressure on both sides of the bearing 307 at both ends is balanced, and there is no pressure difference between the two ends of the bearing 307. This prevents the lubricating medium from being sucked into the altitude chamber 100 or the static pressure chamber 305, which would cause the bearing 307 seal to be damaged.

[0019] Example 2 See also Figures 3-8 The engine altitude compartment power testing device, based on Example 1, further describes the following: In this embodiment, please refer to Figure 3 One end of the drive shaft 400 is fixedly connected to the power output end of the engine, and the other end is provided with a spline part 401. The power input coupling 312 is matched with the spline part 401 by using a spline sleeve shaft, and the power connection is achieved by the two docking. When using the above structure, please refer to Figure 4 , Figure 5A linear motion module 600 is provided within the mounting platform 101. The linear motion module 600 includes a guide rail 601, a horizontal motion table 602, a reduction gearbox 603, a first lead screw 604, and a first drive motor 605. Specifically, the guide rail 601 is fixedly connected to the mounting platform 101, and the horizontal motion table 602 is slidably connected to the guide rail 601. The first lead screw 604 is threadedly connected to the horizontal motion table 602. The reduction gearbox 603 is fixedly connected to the mounting platform 101, and the reduction gearbox 603 is sealed to the mounting platform 101. The power output end of the first drive motor 605 is connected to the first lead screw 604. The first drive motor 605 is fixedly connected to the outside of the mounting platform 101. The first drive motor 605 is connected to the power input end of the reduction gearbox 603. In this way, the power of the first drive motor 605 can be transmitted to the first lead screw 604 through the reduction gearbox 603. Then the horizontal motion table 602 can slide linearly on the guide rail 601. The first drive motor 605 is located outside the altitude chamber 100, so as to avoid the environment of the altitude chamber 100 affecting the service life of the first drive motor 605 and reduce the failure rate. In addition, please see Figure 4 , Figure 5 A lifting motion module 700 is also provided on the horizontal motion platform 602. The lifting motion module 700 includes a guide column 701, a lifting motion platform 702, and a second lead screw 703. That is, the guide column 701 is fixedly connected to the horizontal motion platform 602, the lifting motion platform 702 is slidably connected to the guide column 701, and the second lead screw 703 is threadedly connected to the lifting motion platform 702. A power input mechanism 704 is provided on the horizontal motion platform 602, and the power input mechanism 704 is poweredly connected to the second lead screw 703. A power generating component 705 is provided on the mounting platform 101 in conjunction with the power input mechanism 704. When the linear motion module 600 drives the power input mechanism 704 to move linearly, the power input mechanism 704 and the power generating component 705 cooperate to realize the lifting motion of the lifting motion platform 702. This reduces the drive source of the lifting motion module 700 and avoids the need for a drive motor in the altitude cabin 100, resulting in a low failure rate for the entire device. To elaborate further, please refer to Figure 5 , Figure 6In this embodiment, the power input mechanism 704 includes a worm 7041, a worm wheel 7042, and a gear 7043. Specifically, a worm wheel 7042 is fixedly connected to the bottom end of the second lead screw 703, a worm 7041 is rotatably connected to the horizontal motion table 602, the worm 7041 meshes with the worm wheel 7042, and a gear 7043 is fixedly connected to the worm 7041. The power generating component 705 is matched with the gear 7043 by using a rack. In this way, the self-locking effect of the worm 7041 and the worm wheel 7042 can ensure the stability of the lifting motion table 702 after lifting. To ensure lifting stability, two sets of second lead screws 703 can be threadedly connected to the lifting motion table 702, and each set of second lead screws 703 is fixedly connected to a worm wheel 7042. A worm 7041 is rotatably connected to each set of worm wheels 7042 on the horizontal motion table 602, and the two sets of worms 7041 are connected by a shaft. Furthermore, please refer to Figure 7 , Figure 8 The aforementioned lifting motion platform 702 is fixedly connected to a mounting base 102 on its upper side. In this way, the mounting base 102 is relatively low in its original state, which makes it easy to install the generator. After the generator is installed on the mounting base 102, the linear motion module 600 can drive the generator to move towards the power output device 300. At the same time, the lifting motion module 700 drives the generator to rise. When the gear 7043 disengages from the rack, the generator reaches the predetermined height. Then, the linear motion module 600 continues to drive the generator to move linearly until the spline part 401 is connected to the spline sleeve shaft.

[0020] Example 3 See also Figure 3 , Figure 4 The engine altitude compartment power testing device, based on embodiment 2, further addresses the issue that when the transmission shaft is connected to the power input coupling 312, if the splined portion 401 does not match the splined sleeve shaft, manual rotation of the transmission shaft 400 or connecting shaft 500 is required to achieve a match. However, rotating both the transmission shaft 400 and the connecting shaft 500 requires significant force, making the operation time-consuming and labor-intensive. Therefore, this embodiment is optimized as follows: In this embodiment, a docking drive mechanism 800 is provided on the outer wall of the altitude cabin 100 near the power output device 300. The docking drive mechanism 800 is poweredly connected to the transmission shaft 400, that is, the transmission shaft 400 is driven to rotate through the docking drive mechanism 800, so that the spline part 401 matches the spline sleeve shaft. Specifically, the docking drive mechanism 800 includes a mounting frame 801, a first gear 802, a second gear 803, a second drive motor 804, and an output shaft 805. The mounting frame 801 is fixedly connected to the cabin wall. The second drive motor 804 is fixedly connected to the mounting frame 801. The second drive motor 804 is poweredly connected to the output shaft 805. The first gear 802 is fixedly connected to the output shaft 805. The second gear 803 is fixedly connected to the connecting shaft 500. The first gear 802 and the second gear 803 are meshed and connected.

[0021] Example 4 See also Figures 7-11 The engine altitude compartment power testing device, based on embodiment 3, further specifies that, to avoid the docking drive mechanism 800 affecting the test results, the output shaft 805 in this embodiment adopts the following structure: See also Figure 11 The output shaft component 805 includes a main sleeve shaft 8051, a telescopic shaft 8052, and a first spring 8053. Specifically, the main sleeve shaft 8051 is rotatably connected to the mounting frame 801 and is powered by the second drive motor 804. The main sleeve shaft 8051 is provided with a motion cavity 8054, and the motion cavity 8054 is provided with a spline groove 8055. A spline bar 8056 is fixedly connected to the telescopic shaft 8052 and is slidably connected in the spline groove 8055. The first spring 8053 is fixedly connected in the motion cavity 8054 and is fixedly connected to the telescopic shaft 8052. A first gear 802 is fixedly connected to the telescopic shaft 8052. Further, please refer to Figures 7-10 A pusher 900 is provided on the cabin wall in conjunction with the first gear 802. The pusher 900 includes a motion shaft 901, a push head 902, a second spring 903, and a sealing platform 904. That is, the motion shaft 901 is slidably connected to the cabin wall, a sealing sleeve is provided between the motion shaft 901 and the cabin wall, the push head 902 is fixedly connected to the outer end of the motion shaft 901, the push head 902 abuts against the first gear 802, a limiting platform is fixedly connected to the outer area of ​​the motion shaft 901, the second spring 903 is sleeved on the motion shaft 901, one end of the second spring 903 is fixedly connected to the limiting platform, and the other end is fixedly connected to the cabin wall. The sealing platform 904 is fixedly connected to the inner area of ​​the motion shaft 901, and a sealing ring is provided on the sealing platform 904. Furthermore, a pusher 1000 is provided on the mounting base 102 corresponding to the motion shaft 901. When the linear motion module 600 drives the mounting base 102 to move linearly, the pusher 1000 can push the motion shaft 901 linearly. The motion shaft 901 can drive the pusher head 902 to push the first gear 802 to move linearly. At this time, the telescopic shaft 8052 moves into the main sleeve shaft 8051, compressing the first spring 8053, causing the first gear 802 and the second gear 803 to be misaligned. At this time, the sealing ring abuts against the inner wall of the cabin wall to further improve the sealing performance of the altitude cabin 100. When the pusher 1000 does not push the motion shaft 901, under the elastic force of the first spring 8053, the telescopic shaft 8052 can drive the first gear 802 to move towards the second gear 803. When the first gear 802 and the second gear 803 are not engaged, the first spring 8053 is still in a compressed state. When the second drive motor 804 drives the first gear 802 to rotate and engage with the second gear 803, the two mesh under the action of the first spring 8053.

[0022] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An engine altitude chamber power testing device, comprising an altitude chamber (100), a dynamometer (200), and a power output device (300), wherein the bottom surface of the altitude chamber (100) is provided with a mounting platform (101), a mounting seat (102) is fixed on the mounting platform (101), and an engine is connected to the mounting seat (102), characterized in that: A dynamometer (200) is fixedly connected to the outside of the altitude chamber (100). A power output device (300) is connected to the chamber wall of the altitude chamber (100). The power output end of the engine is connected to the power output device (300) via a drive shaft (400). The power output device (300) is connected to the dynamometer (200) via a connecting shaft (500). The power output device (300) includes a bearing housing (303) and a transmission main shaft (304) rotatably connected to the bearing housing (303). A static pressure chamber (305) is provided between the transmission main shaft (304) and the bearing housing (303). Sealing rings (306) are provided on both sides of the static pressure chamber (305) between the transmission main shaft (304) and the bearing housing (303). Bearings (307) are connected to both ends of the bearing housing (303). The transmission main shaft (304) cooperates with the bearings (307), and the bearings (307) and sealing rings (306) cooperate with each other. A balance chamber (308) is provided between 306 and 308. A balance air passage (309) is provided on the bearing seat (303) and connected to the balance chamber (308). One set of balance air passages (309) is connected to the interior of the altitude chamber (100), and another set of balance air passages (309) is connected to the exterior of the altitude chamber (100). The static pressure chamber (305) is connected to the balance pipe (311). The balance pipe (311) is connected to the vacuum pump. One end of the drive shaft (304) is connected to the drive shaft (400) and the other end is connected to the connecting shaft (500).

2. The engine altitude compartment power testing device according to claim 1, characterized in that: The power output device (300) further includes a mounting housing (301), a sealing connecting sleeve (302), a power output coupling (313), and a power input coupling (312). The sealing connecting sleeve (302) is fixedly connected to the mounting housing (301) and is fixedly connected to the cabin wall. The bearing seat (303) is fixedly connected to the sealing connecting sleeve (302) and is fixedly connected to the altitude cabin (100). The balance pipe is fixedly connected to the sealing connecting sleeve (302). (311) A vacuum passage (310) is provided in the bearing housing (303) and communicates with the static pressure chamber (305). The balance pipe (311) is connected to the vacuum passage (310). One end of the transmission main shaft (304) is fixedly connected to the power input coupling (312). The power input coupling (312) is poweredly connected to the transmission shaft (400). The other end of the transmission main shaft (304) is fixedly connected to the power output coupling (313). The power output coupling (313) is poweredly connected to the transmission shaft (400).

3. The engine altitude compartment power testing device according to claim 2, characterized in that: The installation platform (101) is provided with a linear motion module (600), which includes a horizontal motion platform (602). The horizontal motion platform (602) is provided with a lifting motion module (700), which includes a lifting motion platform (702). The mounting base (102) is fixedly connected to the lifting motion platform (702). One end of the drive shaft (400) is fixedly connected to the power output end of the engine, and the other end is provided with a spline part (401). The power input coupling (312) and the spline part (401) are matched by a spline sleeve shaft. The linear motion module (600) and the lifting motion module (700) can drive the engine to move, so that the spline part (401) is inserted into the power input coupling (312).

4. The engine altitude compartment power testing device according to claim 3, characterized in that: The lifting motion module (700) includes a power input mechanism (704). The mounting platform (101) is equipped with a power generating component (705) in cooperation with the power input mechanism (704). When the linear motion module (600) drives the power input mechanism (704) to move linearly, the power input mechanism (704) and the power generating component (705) cooperate to realize the lifting motion of the lifting platform (702).

5. The engine altitude compartment power testing device according to claim 4, characterized in that: The linear motion module (600) further includes a guide rail (601), a reduction gearbox (603), a first lead screw (604), and a first drive motor (605). The guide rail (601) is fixedly connected to the mounting platform (101), and the horizontal motion table (602) is slidably connected to the guide rail (601). The first lead screw (604) is threadedly connected to the horizontal motion table (602). The reduction gearbox (603) is fixedly connected to the mounting platform (101). The power output end of the reduction gearbox (603) is poweredly connected to the first lead screw (604). The first drive motor (605) is fixedly connected to the outside of the mounting platform (101), and the first drive motor (605) is poweredly connected to the power input end of the reduction gearbox (603). The lifting motion module (700) also includes a guide column (701) and a second lead screw (703). The guide column (701) is fixedly connected to the horizontal motion table (602). The lifting motion table (702) is slidably connected to the guide column (701). The second lead screw (703) is threadedly connected to the lifting motion table (702). The power input mechanism (704) is provided on the horizontal motion table (602). The power input mechanism (704) is poweredly connected to the second lead screw (703).

6. The engine altitude compartment power testing device according to claim 5, characterized in that: The power input mechanism (704) includes a worm (7041), a worm wheel (7042), and a gear (7043). The bottom end of the second lead screw (703) is fixedly connected to the worm wheel (7042). The worm (7041) is rotatably connected to the horizontal motion table (602). The worm (7041) is meshed with the worm wheel (7042). The gear (7043) is fixedly connected to the worm (7041). The power generating component (705) is matched with the gear (7043) by using a rack.

7. The engine altitude compartment power testing device according to claim 3, characterized in that: A docking drive mechanism (800) is provided on the outer wall of the altitude cabin (100) near the power output device (300), and the docking drive mechanism (800) is poweredly connected to the drive shaft (400).

8. The engine altitude compartment power testing device according to claim 7, characterized in that: The docking drive mechanism (800) includes a mounting frame (801), a first gear (802), a second gear (803), a second drive motor (804), and an output shaft (805). The mounting frame (801) is fixedly connected to the bulkhead. The second drive motor (804) is fixedly connected to the mounting frame (801). The second drive motor (804) is poweredly connected to the output shaft (805). The first gear (802) is fixedly connected to the output shaft (805). The second gear (803) is fixedly connected to the connecting shaft (500). The first gear (802) and the second gear (803) are meshed together.

9. The engine altitude compartment power testing device according to claim 8, characterized in that: The output shaft component (805) includes a main sleeve shaft (8051), a telescopic shaft (8052), and a first spring (8053). The main sleeve shaft (8051) is rotatably connected to the mounting frame (801). The main sleeve shaft (8051) is poweredly connected to the second drive motor (804). The main sleeve shaft (8051) is provided with a motion cavity (8054). The motion cavity (8054) is provided with a spline groove (8055). A spline bar (8056) is fixedly connected to the telescopic shaft (8052). The spline bar (8056) is slidably connected to the spline groove (8055). The first spring (8053) is fixedly connected to the motion cavity (8054). The first spring (8053) is fixedly connected to the telescopic shaft (8052). The first gear (802) is fixedly connected to the telescopic shaft (8052). The cabin wall is provided with a pusher (900) that cooperates with the first gear (802). The mounting base (102) is provided with a pusher (1000) corresponding to the pusher (900). When the mounting base (102) moves in a straight line, the pusher (1000) can push the pusher (900) in a straight line. The pusher (900) can push the first gear (802) to move in a straight line, so that the first gear (802) and the second gear (803) are misaligned.

10. The engine altitude compartment power testing device according to claim 9, characterized in that: The pusher (900) includes a motion shaft (901), a push head (902), a second spring (903), and a sealing platform (904). The motion shaft (901) is slidably connected to the cabin wall. A sealing sleeve is provided between the motion shaft (901) and the cabin wall. The push head (902) is fixedly connected to the outer end of the motion shaft (901). The push head (902) abuts against the first gear (802). A sealing plate is fixedly connected to the outer area of ​​the motion shaft (901). The limiting platform has a second spring (903) fitted on the motion shaft (901). One end of the second spring (903) is fixedly connected to the limiting platform, and the other end is fixedly connected to the cabin wall. The sealing platform (904) is fixedly connected to the inner area of ​​the motion shaft (901). The sealing platform (904) is provided with a sealing ring. After the push head (902) pushes the first gear (802) and the second gear (803) to misalign, the sealing ring abuts against the inner wall of the cabin wall.

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