A rocket engine nozzle simulation load device

Abstract

The present invention discloses a rocket engine nozzle simulation load device, which relates to the field of aerospace technology, and includes a platform and a gear speed increasing module. The platform is provided with a gear speed increasing module, and the gear speed increasing module is used to simulate the transmission condition under a large load; the gear speed increasing module includes: a first rotating shaft, a first gear, a second gear and a third rotating shaft. The present invention realizes the large load simulation function of the equipment friction, inertia and constant small load structure by installing the gear speed increasing module, solves the problem that a comprehensive test cannot be performed due to limited site, and reduces the test cost.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, and in particular to a rocket engine nozzle simulation load device. Background Art

[0002] As the key actuator of rocket nozzle thrust vector control, the servo mechanism has an important impact on the stability and accuracy of the rocket. The nozzle simulation load device is one of the important tools for evaluating and verifying the performance of the servo mechanism. It is used to simulate the various complex mechanical loads that the nozzle bears in the real flight environment of the rocket, providing important support for the design, optimization and testing of the rocket engine nozzle.

[0003] With the continuous development of rocket technology, people have higher and higher requirements for flight stability, accuracy and safety, and the importance of rocket engine nozzle simulation load equipment has become increasingly prominent. Traditional simulation load equipment has problems such as limited simulation range, low simulation accuracy and incomplete simulation load types. Therefore, a rocket engine nozzle simulation load equipment is extremely important.

[0004] 1. Patent document CN106043745B discloses a device for simulating the rotational inertia load of a solar panel drive mechanism. The above patent realizes the simulation of rotational inertia, but the above patent cannot realize the large load simulation function of the equipment friction, inertia, and constant small load structure.

[0005] 2. Patent document CN102323547B discloses a load simulation test device, a test method and a load simulation test control device. The above patent realizes the real-time adjustment of the rotational torque and rotational inertia of the transmission shaft, but the above patent cannot realize the adjustment function of the transmission gear.

[0006] 3. Patent document CN106249149B discloses a control system for an engine simulation load device. The above patent realizes the real-time performance, stability and control accuracy of the system, but the above patent cannot realize the position detection function of the transmission gear.

[0007] 4. Patent document CN107525676B discloses a simple simulated load and test device for a thrust vectoring engine gas rudder. The above patent effectively reduces the test cost of the thrust vectoring engine gas rudder, but the above patent cannot realize the wear detection function of the transmission gear.

[0008] In summary, the above patents cannot realize the large load simulation function of the equipment friction and inertia and the constant small load structure, the adjustment function of the transmission gear, the position detection function of the transmission gear, and the wear detection function of the transmission gear, resulting in the problems of large space occupied by the load simulation test device, insufficient applicability and flexibility of the equipment, loss of control of the gear position, and equipment failure;

[0009] To this end, the present application proposes a rocket engine nozzle simulation load device that can realize the large load simulation function of equipment friction and inertia and constant small load structure, the adjustment function of transmission gears, the position detection function of transmission gears, and the wear detection function of transmission gears. Summary of the invention

[0010] The purpose of the present invention is to provide a rocket engine nozzle simulation load device to solve the technical problems proposed in the above background technology that the large load simulation function of the equipment friction and inertia and the constant small load structure, the adjustment function of the transmission gear, the position detection function of the transmission gear, and the wear detection function of the transmission gear cannot be realized, resulting in a large space occupied by the load simulation test device, insufficient applicability and flexibility of the equipment, gear position loss of control, and equipment failure.

[0011] To achieve the above object, the present invention provides the following technical solutions: a rocket engine nozzle simulation load device, comprising a platform and a gear speed increasing module, wherein the platform is equipped with a gear speed increasing module, and the gear speed increasing module is used to simulate the transmission condition under a large load;

[0012] The gear speed increasing module comprises: a first rotating shaft, a first gear, a second gear and a third rotating shaft;

[0013] The top of the outer wall of the platform is symmetrically fixedly connected with a fixing plate, and the fixing plate is sleeved on the outer wall of the first rotating shaft, the outer wall of the first rotating shaft is fixedly connected with a torque sensor, and the side wall of the torque sensor is fixedly connected with a driving shaft, and the outer wall of the driving shaft is connected with a hydraulic servo driving mechanism by bolts, and the side wall of the driving shaft is fixedly connected with the second rotating shaft, and the outer wall of the second rotating shaft is sleeved with a fixing plate, and the outer wall of the first rotating shaft is sleeved with the first gear, and the second gear is meshingly installed on the outer wall of the first gear, and the second gear is sleeved on the outer wall of the gear shaft, and the gear shaft is sleeved on the outer wall of the third rotating shaft, and the outer wall of the third rotating shaft is sleeved with an inertia disk, and sliding plates are sleeved at both ends of the third rotating shaft, and one side of the outer wall of the third rotating shaft is fixedly connected with a constant The constant torque sensor is fixedly connected to a speed increaser on the side wall of the speed increaser, a coupling is fixedly connected to the side wall of the coupling, a servo motor is fixedly connected to the side wall of the coupling, a first connecting block is mounted on the outer wall of the coupling, a sliding plate is fixedly connected to the side wall of the servo motor, a friction torque sensor is fixedly connected to one side of the outer wall of the third rotating shaft, a friction shaft is fixedly connected to the side wall of the friction torque sensor, a second connecting block is fixedly connected to the side wall of the sliding plate, a friction groove is opened in the second connecting block, a hydraulic cylinder is equidistantly installed on the bottom of the outer wall of the friction groove, a friction plate is fixedly connected to the top of the hydraulic cylinder, and the friction plate is located below the friction shaft.

[0014] Preferably, a gear adjustment module is installed on the gear shaft and the sliding plate, and a gear detection module is used for the meshing condition between the first gear and the second gear;

[0015] The gear adjustment module includes: an adjustment gear, a fastening bolt, a first motor, a first rotating rod and a first rotating gear;

[0016] The outer wall of the gear shaft is sleeved with an adjusting gear, the side wall of the adjusting gear is fixedly connected to the second gear, the side wall of the gear shaft is detachably connected to a fastening bolt, the side wall of the fastening bolt is detachably connected to the third rotating shaft, the side wall of the sliding plate is provided with a mounting groove, the outer wall of the mounting groove is fixedly connected to the first motor, the side wall of the first motor is provided with a first rotating rod, the outer wall of the first rotating rod is fixedly connected to the first rotating gear, the top of the fixed plate is provided with an adjusting groove, the adjusting groove is sleeved on the outer wall of the sliding plate, the side wall of the adjusting groove is fixedly connected to the first toothed plate, and the first rotating gear is meshed with the first toothed plate.

[0017] Preferably, a gear detection module is installed on the fixed plate, and the gear detection module is used to detect the meshing condition between the gears;

[0018] The gear detection module includes: infrared sensor, signal transmission line and signal processor;

[0019] The side wall of the fixed plate is fixedly connected with an infrared sensor, the infrared sensor is located above the first rotating shaft, the side wall of the infrared sensor is fixedly connected to one side of the signal transmission line, the other side of the signal transmission line is fixedly connected to the side wall of the signal processor, and the signal processor is connected to the first motor via Bluetooth.

[0020] Preferably, a wear detection module is installed on the first gear and the second gear, and the wear detection module is used to detect the rotation angle of the first gear and the second gear to evaluate the wear condition of the gears;

[0021] The wear detection module includes: a first angle collector, a second angle collector and an angle analyzer;

[0022] The first gear side wall is fixedly connected with a first angle collector, the second gear side wall is fixedly connected with a second angle collector, the bottom of the fixed plate side wall is fixedly connected with an angle analyzer, and the first angle collector and the second angle collector are connected to the angle analyzer via Bluetooth.

[0023] Preferably, the bottom of the hydraulic servo drive mechanism is connected to a supporting spring plate by bolts, the top of the outer wall of the platform is fixedly connected to a first clamping block, a clamping groove is opened in the first clamping block, the clamping groove is sleeved on the outer wall of the supporting spring plate, the outer wall of the clamping groove is fixedly connected to a second tooth plate, the side wall of the supporting spring plate is fixedly connected to a third tooth plate, a second motor is installed in the clamping groove, the bottom of the second motor is fixedly connected to a platform body, a second rotating rod is installed on the top of the second motor, a second rotating gear is fixedly connected to the top of the second rotating rod, the second rotating gear is meshed with the second tooth plate, the second rotating gear is meshed with the third tooth plate, and the platform body is sleeved on the bottom of the outer wall of the first clamping block.

[0024] Preferably, the side wall of the fixed plate is fixedly connected to a fixed block, a sliding groove is provided in the fixed block, a third motor is fixedly connected to the bottom of the outer wall of the sliding groove, a third rotating rod is installed on the top of the third motor, the fixed block is sleeved on the top of the outer wall of the third rotating rod, a movable plate is sleeved on the outer wall of the third rotating rod, the thread of the third rotating rod matches that of the movable plate, the sliding groove is sleeved on the outer wall of the movable plate, a second clamping block is fixedly connected to the side wall of the movable plate, an elastic torsion bar is detachably connected in the second clamping block, a first fixing bolt is detachably connected to the side wall of the second clamping block, an elastic torque sensor is fixedly connected to the side wall of the elastic torsion bar, and a first rotating shaft is fixedly connected to the side wall of the elastic torque sensor.

[0025] Preferably, the equidistantly arranged hydraulic cylinders are connected via hydraulic oil pipes, and the hydraulic cylinders are connected to the proportional pressure reducing valve via hydraulic oil pipes.

[0026] Preferably, the side wall of the inertia disc is detachably connected to an inertia block, the side wall of the inertia block is detachably connected to a second fixing bolt, and the side wall of the second fixing bolt is detachably connected to the inertia disc.

[0027] Preferably, the constant torque sensor is fixedly connected to a side of the third rotating shaft close to the inertia disk, and the friction torque sensor is fixedly connected to a side of the third rotating shaft close to the first gear.

[0028] Preferably, the infrared sensor and the signal processor are fixedly connected to a fixed plate close to the first gear.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention realizes the large load simulation function of equipment friction, inertia, and constant small load structure by installing a gear speed increasing module, solves the problem of being unable to conduct comprehensive testing due to limited site, and reduces the testing cost;

[0031] 2. The present invention realizes the adjustment function of the transmission gear by installing a gear adjustment module, realizes the adjustment of the transmission ratio according to different test requirements, solves the problem of large test limitations caused by the fixed transmission ratio of the transmission gear, and improves the applicability and flexibility of the equipment;

[0032] 3. The present invention realizes the position detection function of the transmission gear by installing a gear detection module, solves the problem of test error and safety hazard caused by incorrect gear position, and improves the accuracy and safety of the test;

[0033] 4. The present invention realizes the wear detection function of the transmission gear by installing a wear detection module, solves the problem of equipment performance degradation caused by untimely detection of gear wear, and improves the maintainability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a partial structural schematic diagram of the wear detection module of the present invention;

[0035] Figure 2 It is a partial structural schematic diagram of the gear speed increasing module of the present invention;

[0036] Figure 3 It is a schematic diagram of elastic moment simulation of the present invention;

[0037] Figure 4 It is a schematic diagram of support stiffness simulation of the present invention;

[0038] Figure 5 It is a partial structural schematic diagram of the gear adjustment module of the present invention;

[0039] Figure 6 It is a partial structural schematic diagram of the gear detection module of the present invention;

[0040] Figure 7 It is a schematic diagram of constant torque simulation of the present invention;

[0041] Figure 8 It is a schematic diagram of friction torque simulation of the present invention.

[0042] In the figure: 1, platform; 2, fixing plate; 3, first rotating shaft; 4, torque sensor; 5, driving shaft; 6, hydraulic servo drive mechanism; 7, second rotating shaft; 8, first gear; 9, second gear; 10, gear shaft; 11, third rotating shaft; 12, inertia plate; 13, sliding plate; 14, constant torque sensor; 15, speed increaser; 16, coupling; 17, servo motor; 18, first connecting block; 19, friction torque sensor; 20, friction shaft; 21, friction groove; 22, friction plate; 23, second connecting block; 24, hydraulic cylinder; 25, adjusting gear; 26, fastening bolt; 27, mounting groove; 28, first motor; 29, first rotating rod; 30, first rotating gear; 31 , adjusting slot; 32, first tooth plate; 33, infrared sensor; 34, signal transmission line; 35, signal processor; 36, first angle collector; 37, second angle collector; 38, angle analyzer; 39, supporting spring plate; 40, first clamping block; 41, clamping slot; 42, second tooth plate; 43, third tooth plate; 44, second motor; 45, second rotating rod; 46, second rotating gear; 47, fixed block; 48, third motor; 49, third rotating rod; 50, moving plate; 51, second clamping block; 52, elastic torsion bar; 53, first fixing bolt; 54, elastic torque sensor; 55, proportional pressure reducing valve; 56, inertia block; 57, second fixing bolt; 58, sliding slot. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example 1

[0047] See also Figure 1-Figure 8 , an embodiment provided by the present invention: a rocket engine nozzle simulation load device, comprising a platform 1 and a gear speed-increasing module, the platform 1 is equipped with a gear speed-increasing module, the gear speed-increasing module is used to simulate the transmission condition under a large load; the gear speed-increasing module comprises: a first rotating shaft 3, a first gear 8, a second gear 9 and a third rotating shaft 11; the top of the outer wall of the platform 1 is symmetrically fixedly connected with a fixing plate 2, the fixing plate 2 is sleeved on the outer wall of the first rotating shaft 3, the outer wall of the first rotating shaft 3 is fixedly connected with a torque sensor 4, the side wall of the torque sensor 4 is fixedly connected with a driving shaft 5, the outer wall of the driving shaft 5 is connected with a hydraulic servo driving mechanism 6 by bolts, the side wall of the driving shaft 5 is fixedly connected with a second rotating shaft 7, the outer wall of the second rotating shaft 7 is sleeved with a fixing plate 2, the outer wall of the first rotating shaft 3 is sleeved with the first gear 8, the outer wall of the first gear 8 is meshingly installed with a second gear 9, the second gear 9 is sleeved on the outer wall of the gear shaft 10, the gear shaft 10 is sleeved on the outer wall of the third rotating shaft 11, the third rotating shaft 1 The outer wall of the third rotating shaft 11 is provided with an inertia disk 12, and sliding plates 13 are provided at both ends of the third rotating shaft 11. A constant torque sensor 14 is fixedly connected to one side of the outer wall of the third rotating shaft 11, and a speed increaser 15 is fixedly connected to the side wall of the constant torque sensor 14. A coupling 16 is fixedly connected to the side wall of the speed increaser 15, and a servo motor 17 is fixedly connected to the side wall of the coupling 16. A first connecting block 18 is provided on the outer wall of the coupling 16, and the sliding plates 13 are fixedly connected to the side wall of the first connecting block 18. The side wall of the machine 17 is fixedly connected with a first connecting block 18, one side of the outer wall of the third rotating shaft 11 is fixedly connected with a friction torque sensor 19, the side wall of the friction torque sensor 19 is fixedly connected with a friction shaft 20, the side wall of the sliding plate 13 is fixedly connected with a second connecting block 23, a friction groove 21 is opened in the second connecting block 23, the bottom of the outer wall of the friction groove 21 is equidistantly installed with a hydraulic cylinder 24, the top of the hydraulic cylinder 24 is fixedly connected with a friction plate 22, and the friction plate 22 is located below the friction shaft 20;

[0048] Further, the hydraulic servo drive mechanism 6 pushes the drive shaft 5, the drive shaft 5 drives the first rotating shaft 3 to rotate, the first rotating shaft 3 drives the first gear 8 to rotate, the first gear 8 drives the second gear 9 meshing therewith to rotate, the second gear 9 drives the gear shaft 10 to rotate, the gear shaft 10 drives the third rotating shaft 11 to rotate, the first gear 8 and the second gear 9 transmit power through meshing, and transmit the power after speed conversion to the third rotating shaft 11, the rotation of the third rotating shaft 11 drives the rotation of the inertia disk 12, the inertia disk 12 has a large rotational inertia, the inertia disk 12 simulates the inertia and load characteristics of the rocket engine nozzle in a real environment, the servo motor 17 applies corresponding torque to the third rotating shaft 11 through the coupling 16 and the speed increaser 15 according to the preset constant torque value, the constant torque sensor 14 monitors and records the torque value on the third rotating shaft 11 in real time, and adjusts according to the torque value The output of the whole servo motor 17 ensures that the loaded torque value is stable and accurate. The speed increaser 15 is used to adjust the speed of the third rotating shaft 11 to achieve the effect of simulating different load states. The coupling 16 ensures the stability and accuracy of power transmission. The hydraulic cylinder 24 in the friction groove 21 pushes the friction plate 22, and the friction plate 22 squeezes the friction shaft 20, thereby generating dry friction between the materials to achieve the loading of the friction torque. The transmission ratio of the first gear 8 to the second gear 9 achieves the effect of reducing the speed of the first rotating shaft 3 and increasing the torque of the third rotating shaft 11. When simulating inertia and friction resistance, the transmission of its inertia and friction resistance will be affected by the transmission ratio. The inertia and friction resistance on the third rotating shaft 11 are the square of the transmission ratio of the inertia and friction resistance on the first rotating shaft 3, thereby reducing the weight and volume of the inertia and friction resistance simulation load, and saving the occupied space of the load simulation test device.

[0049] Example 2

[0050] See also Figure 1-Figure 8 The present invention provides an embodiment: a rocket engine nozzle simulation load device, wherein a gear adjustment module is installed on the gear shaft 10 and the sliding plate 13, and the gear adjustment module is used to adjust the transmission ratio and load simulation; the gear adjustment module includes: an adjustment gear 25, a fastening bolt 26, a first motor 28, a first rotating rod 29 and a first rotating gear 30; the outer wall of the gear shaft 10 is sleeved with an adjustment gear 25, the side wall of the adjustment gear 25 is fixedly connected to the second gear 9, and the side wall of the gear shaft 10 is detachably connected to the fastening bolt Bolt 26, the side wall of the fastening bolt 26 is detachably connected to the third rotating shaft 11, the side wall of the sliding plate 13 is provided with a mounting groove 27, the outer wall of the mounting groove 27 is fixedly connected to the first motor 28, the side wall of the first motor 28 is provided with a first rotating rod 29, the outer wall of the first rotating rod 29 is fixedly connected to the first rotating gear 30, the top of the fixed plate 2 is provided with an adjusting groove 31, the adjusting groove 31 is sleeved on the outer wall of the sliding plate 13, the side wall of the adjusting groove 31 is fixedly connected to the first toothed plate 32, and the first rotating gear 30 is meshed with the first toothed plate 32;

[0051] Further, the fastening bolt 26 on the gear shaft 10 is loosened to change the position of the gear shaft 10 on the third rotating shaft 11. The gear shaft 10 drives the adjusting gear 25, thereby adjusting the adjusting gear 25 to the initial position of the second gear 9. The gear shaft 10 is re-fixed to the third rotating shaft 11 by the fastening bolt 26, thereby realizing the horizontal position adjustment of the adjusting gear 25. The first motor 28 in the mounting groove 27 is started, and the first motor 28 drives the first rotating rod 29 to rotate. The first rotating rod 29 drives the first rotating gear 30. Since the first rotating gear 30 is aligned with the first gear 9, the first rotating gear 30 is rotated. The plates 32 are meshed with each other, and the first tooth plate 32 is fixedly connected to the adjustment groove 31 in the fixed plate 2, so that the first rotating gear 30 slides on the first tooth plate 32, the first rotating gear 30 drives the first rotating rod 29 to move, the first rotating rod 29 drives the first motor 28 to move, the first motor 28 drives the sliding plate 13 to move, the sliding plate 13 drives the third rotating shaft 11 to move, the third rotating shaft 11 drives the gear shaft 10 to move, and the gear shaft 10 drives the adjusting gear 25 to move, thereby realizing the vertical position adjustment of the adjusting gear 25 and realizing the adjustment function of the transmission gear.

[0052] Example 3

[0053] See also Figure 1-Figure 8 , an embodiment provided by the present invention: a rocket engine nozzle simulation load device, wherein a gear detection module is installed on the fixed plate 2, and the gear detection module is used for the meshing condition between the first gear 8 and the second gear 9; the gear detection module comprises: an infrared sensor 33, a signal transmission line 34 and a signal processor 35; the side wall of the fixed plate 2 is fixedly connected with the infrared sensor 33, the infrared sensor 33 is located above the first rotating shaft 3, the side wall of the infrared sensor 33 is fixedly connected to one side of the signal transmission line 34, and the other side of the signal transmission line 34 is fixedly connected to the side wall of the signal processor 35, and the signal processor 35 is connected to the first motor 28 via Bluetooth;

[0054] Furthermore, the infrared sensor 33 monitors the position of the second gear 9 in real time, and detects the meshing condition of the first gear 8 and the second gear 9. The signal transmission line 34 transmits the position information of the second gear 9 monitored by the infrared sensor 33 to the signal processor 35. The signal processor 35 receives the position information. The signal processor 35 analyzes whether the first gear 8 and the second gear 9 are meshed according to the position information of the second gear 9. When the signal processor 35 determines that the adjustment gear 25 is not meshed with the first gear 8, the signal processor 35 generates an adjustment instruction and transmits the adjustment instruction to the first motor 28, thereby adjusting the position of the second gear 9, thereby realizing the gear position detection function.

[0055] Example 4

[0056] See also Figure 1-Figure 8, an embodiment provided by the present invention: a rocket engine nozzle simulation load device, wherein a wear detection module is installed on the first gear 8 and the second gear 9, and the wear detection module is used to detect the rotation angle of the first gear 8 and the second gear 9 to evaluate the wear condition of the gears; the wear detection module includes: a first angle collector 36, a second angle collector 37 and an angle analyzer 38; the first angle collector 36 is fixedly connected to the side wall of the first gear 8, the second angle collector 37 is fixedly connected to the side wall of the second gear 9, the angle analyzer 38 is fixedly connected to the bottom of the side wall of the fixing plate 2, and the first angle collector 36 and the second angle collector 37 are connected to the angle analyzer 38 via Bluetooth;

[0057] Furthermore, the first angle collector 36 monitors the rotation angle of the first gear 8 in real time, and transmits the rotation angle information to the angle analyzer 38. The second angle collector 37 monitors the rotation angle of the second gear 9 in real time, and transmits the rotation angle information to the angle analyzer 38. The angle analyzer 38 collects and records the rotation angle information. The angle analyzer 38 analyzes whether there is an abnormal change by comparing the angle change data and the transmission ratio data. If an abnormal angle change is found, the angle analyzer 38 determines that the tooth surfaces of the first gear 8 and the second gear 9 have been worn, and the angle analyzer 38 will notify relevant personnel to carry out timely repairs.

[0058] Example 5

[0059] See also Figure 1-Figure 8 , an embodiment provided by the present invention: a rocket engine nozzle simulation load device, the bottom of the hydraulic servo drive mechanism 6 is connected with a support spring plate 39 by bolts, the top of the outer wall of the platform 1 is fixedly connected with a first clamping block 40, a clamping groove 41 is opened in the first clamping block 40, the clamping groove 41 is sleeved on the outer wall of the support spring plate 39, the outer wall of the clamping groove 41 is fixedly connected with a second tooth plate 42, the side wall of the support spring plate 39 is fixedly connected with a third tooth plate 43, a second motor 44 is installed in the clamping groove 41, the bottom of the second motor 44 is fixedly connected with the platform 1, the top of the second motor 44 is installed with a second rotating rod 45, the top of the second rotating rod 45 is fixedly connected with a second rotating gear 46, the second rotating gear 46 is meshed with the second tooth plate 42, the second rotating gear 46 is meshed with the third tooth plate 43, and the platform 1 is sleeved on the bottom of the outer wall of the first clamping block 40;

[0060] Further, the second motor 44 is started, and the second motor 44 drives the second rotating rod 45 to rotate, and the second rotating rod 45 drives the second rotating gear 46 to rotate. Since the second rotating gear 46 is meshed with the second tooth plate 42 and the third tooth plate 43, the second rotating gear 46 drives the second tooth plate 42 and the third tooth plate 43 to move, and the second tooth plate 42 drives the first clamping block 40 to slide on the platform 1, and the third tooth plate 43 drives the supporting spring plate 39 to move, and the first clamping block 40 and the supporting spring plate 39 move in opposite directions, thereby realizing the adjustment of the cantilever length of the supporting spring plate 39 and the adjustment of the supporting stiffness of the hydraulic servo drive mechanism 6.

[0061] Example 6

[0062] See also Figure 1-Figure 8 , an embodiment of the present invention: a rocket engine nozzle simulation load device, the side wall of the fixed plate 2 is fixedly connected with a fixed block 47, a sliding groove 58 is opened in the fixed block 47, a third motor 48 is fixedly connected to the bottom of the outer wall of the sliding groove 58, a third rotating rod 49 is installed on the top of the third motor 48, the fixed block 47 is sleeved on the top of the outer wall of the third rotating rod 49, a moving plate 50 is sleeved on the outer wall of the third rotating rod 49, the third rotating rod 49 matches the thread of the moving plate 50, the sliding groove 58 is sleeved on the outer wall of the moving plate 50, the side wall of the moving plate 50 is fixedly connected with a second clamping block 51, the second clamping block 51 is detachably connected with an elastic torsion bar 52, the side wall of the second clamping block 51 is detachably connected with a first fixing bolt 53, the side wall of the elastic torsion bar 52 is fixedly connected with an elastic torque sensor 54, and the side wall of the elastic torque sensor 54 is fixedly connected with a first rotating shaft 3;

[0063] Further, the first fixing bolt 53 on the second clamping block 51 is loosened, the third motor 48 is started, the third motor 48 drives the third rotating rod 49 to rotate, the third rotating rod 49 matches the thread of the movable plate 50, so that the third rotating rod 49 drives the movable plate 50 to move in the sliding groove 58, and the movable plate 50 drives the second clamping block 51 to move. The movement of the second clamping block 51 changes the position of the clamping point of the elastic torsion bar 52, thereby realizing the elastic torque adjustment, and the elastic torque sensor 54 monitors the elastic torque value of the first rotating shaft 3 in real time.

[0064] Working principle: start the second motor 44, change the cantilever length of the supporting spring plate 39, adjust the supporting stiffness of the hydraulic servo drive mechanism 6, change the position of the gear shaft 10 on the third rotating shaft 11, adjust the horizontal position of the second gear 9 and the adjusting gear 25, start the first motor 28, adjust the vertical position of the second gear 9 and the adjusting gear 25, the infrared sensor 33 monitors the position of the second gear 9 in real time, and transmits the information to the signal processor 35 through the signal transmission line 34. The signal processor 35 analyzes the meshing condition between the first gear 8 and the second gear 9 according to the information. When the signal processor 35 determines that the second gear 9 or the adjusting gear 25 is meshed with the first gear 8, the signal processor 35 controls the first motor 28 to stop;

[0065] The hydraulic servo drive mechanism 6 drives the drive shaft 5, the drive shaft 5 drives the first rotating shaft 3 to rotate, the first rotating shaft 3 drives the first gear 8 to rotate, the first gear 8 drives the second gear 9 or the adjusting gear 25 meshing therewith to rotate, the second gear 9 or the adjusting gear 25 drives the gear shaft 10 to rotate, the gear shaft 10 drives the third rotating shaft 11 to rotate, the third rotating shaft 11 drives the inertia disk 12, and the inertia load is adjusted by increasing or decreasing the inertia block 56 on the inertia disk 12, and then the inertia block 56 is fixed by the second fixing bolt 57, and the servo motor 17 is based on the preset constant torque value. The coupling 16 and the speed increaser 15 apply corresponding torque to the third rotating shaft 11 to achieve the effect of simulating different load states. The coupling 16 ensures the stability and accuracy of power transmission. The friction plate 22 squeezes the friction shaft 20. The proportional pressure reducing valve 55 adjusts the flow and pressure of the hydraulic oil in the hydraulic oil pipe, thereby controlling the extension and contraction amount of the hydraulic oil cylinder 24, thereby achieving the adjustment of the friction resistance. The inertia and friction resistance on the third rotating shaft 11 are the square of the transmission ratio of the inertia and friction resistance on the first rotating shaft 3, thereby reducing the weight and volume of the load simulated by the inertia and friction resistance;

[0066] The elastic torque of the first rotating shaft 3 is monitored in real time by the elastic torque sensor 54. According to actual needs, the third motor 48 is started to change the position of the second clamping block 51, thereby changing the position of the clamping point of the elastic torsion bar 52 to achieve the adjustment of the elastic torque. The torque sensor 4 monitors the synthetic torque of the first rotating shaft 3 in real time to evaluate the load simulation situation.

[0067] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A rocket engine nozzle simulation load device, characterized in that: It comprises a platform (1) and a gear speed increasing module, wherein the platform (1) is provided with the gear speed increasing module, and the gear speed increasing module is used to simulate the transmission condition under a large load; The gear speed increasing module comprises: a first rotating shaft (3), a first gear (8), a second gear (9) and a third rotating shaft (11); A fixing plate (2) is symmetrically fixedly connected to the top of the outer wall of the platform (1), the fixing plate (2) is sleeved on the outer wall of the first rotating shaft (3), the outer wall of the first rotating shaft (3) is fixedly connected to a torque sensor (4), the side wall of the torque sensor (4) is fixedly connected to a driving shaft (5), the outer wall of the driving shaft (5) is bolted to a hydraulic servo driving mechanism (6), the side wall of the driving shaft (5) is fixedly connected to a second rotating shaft (7), the outer wall of the second rotating shaft (7) is sleeved with the fixing plate (2), the outer wall of the first rotating shaft (3) is sleeved with the first gear (8), the outer wall of the first gear (8) is meshingly mounted with a second gear (9), the second gear (9) is sleeved on the outer wall of a gear shaft (10), the gear shaft (10) is sleeved on the outer wall of a third rotating shaft (11), the outer wall of the third rotating shaft (11) is sleeved with an inertia disk (12), both ends of the third rotating shaft (11) are sleeved with sliding plates (13), and one side of the outer wall of the third rotating shaft (11) is fixedly connected to a constant torque sensor (14) ), the constant torque sensor (14) is fixedly connected to a speed increaser (15) on a side wall, the speed increaser (15) is fixedly connected to a coupling (16) on a side wall, the coupling (16) is fixedly connected to a servo motor (17) on a side wall, the coupling (16) is sleeved with a first connection block (18) on an outer wall, the first connection block (18) is fixedly connected to a sliding plate (13) on a side wall, the servo motor (17) is fixedly connected to a first connection block (18) on a side wall, and the outer wall of the third rotating shaft (11) A friction torque sensor (19) is fixedly connected to one side, a friction shaft (20) is fixedly connected to the side wall of the friction torque sensor (19), a second connection block (23) is fixedly connected to the side wall of the sliding plate (13), a friction groove (21) is provided in the second connection block (23), hydraulic cylinders (24) are equidistantly installed at the bottom of the outer wall of the friction groove (21), a friction plate (22) is fixedly connected to the top of the hydraulic cylinder (24), and the friction plate (22) is located below the friction shaft (20).

2. A rocket engine nozzle simulation load device according to claim 1, characterized in that: A gear adjustment module is installed on the gear shaft (10) and the sliding plate (13), and the gear adjustment module is used to adjust the transmission ratio and load simulation; The gear adjustment module comprises: an adjustment gear (25), a fastening bolt (26), a first motor (28), a first rotating rod (29) and a first rotating gear (30); An adjusting gear (25) is sleeved on the outer wall of the gear shaft (10), and a second gear (9) is fixedly connected to the side wall of the adjusting gear (25). A fastening bolt (26) is detachably connected to the side wall of the gear shaft (10), and a third rotating shaft (11) is detachably connected to the side wall of the fastening bolt (26). A mounting groove (27) is provided on the side wall of the sliding plate (13), and a first motor (28) is fixedly connected to the outer wall of the mounting groove (27). A first rotating rod (29) is installed on the side wall of the first motor (28), and a first rotating gear (30) is fixedly connected to the outer wall of the first rotating rod (29). An adjusting groove (31) is provided on the top of the fixed plate (2), and the adjusting groove (31) is sleeved on the outer wall of the sliding plate (13). A first toothed plate (32) is fixedly connected to the side wall of the adjusting groove (31), and the first rotating gear (30) and the first toothed plate (32) are meshed.

3. A rocket engine nozzle simulation load device according to claim 1, characterized in that: A gear detection module is installed on the fixing plate (2), and the gear detection module is used to detect the meshing condition between the first gear (8) and the second gear (9); The gear detection module comprises: an infrared sensor (33), a signal transmission line (34) and a signal processor (35); An infrared sensor (33) is fixedly connected to a side wall of the fixed plate (2), the infrared sensor (33) is located above the first rotating shaft (3), the side wall of the infrared sensor (33) is fixedly connected to one side of a signal transmission line (34), the other side of the signal transmission line (34) is fixedly connected to a side wall of a signal processor (35), and the signal processor (35) is connected to a first motor (28) via Bluetooth.

4. A rocket engine nozzle simulation load device according to claim 1, characterized in that: A wear detection module is installed on the first gear (8) and the second gear (9), and the wear detection module is used to detect the rotation angle of the first gear (8) and the second gear (9) to evaluate the wear condition of the gears; The wear detection module comprises: a first angle collector (36), a second angle collector (37) and an angle analyzer (38); A first angle collector (36) is fixedly connected to the side wall of the first gear (8), a second angle collector (37) is fixedly connected to the side wall of the second gear (9), an angle analyzer (38) is fixedly connected to the bottom of the side wall of the fixed plate (2), and the first angle collector (36) and the second angle collector (37) are connected to the angle analyzer (38) via Bluetooth.

5. The rocket engine nozzle simulation load device according to claim 1, characterized in that: The bottom of the hydraulic servo drive mechanism (6) is connected to a support spring plate (39) by bolts, and a first clamping block (40) is fixedly connected to the top of the outer wall of the platform body (1). A clamping groove (41) is provided in the first clamping block (40), and the clamping groove (41) is sleeved on the outer wall of the support spring plate (39). A second tooth plate (42) is fixedly connected to the outer wall of the clamping groove (41), and a third tooth plate (43) is fixedly connected to the side wall of the support spring plate (39). A second motor (44) is installed in the clamping groove (41), and the bottom of the second motor (44) is fixedly connected to the platform body (1). A second rotating rod (45) is installed on the top of the second motor (44), and a second rotating gear (46) is fixedly connected to the top of the second rotating rod (45), and the second rotating gear (46) is meshed with the second tooth plate (42), and the second rotating gear (46) is meshed with the third tooth plate (43), and the platform body (1) is sleeved on the bottom of the outer wall of the first clamping block (40).

6. The rocket engine nozzle simulation load device according to claim 1, characterized in that: The fixed plate (2) is fixedly connected to a side wall of the fixed plate (47), a sliding groove (58) is provided in the fixed block (47), a third motor (48) is fixedly connected to the bottom of the outer wall of the sliding groove (58), a third rotating rod (49) is installed on the top of the third motor (48), the fixed block (47) is sleeved on the top of the outer wall of the third rotating rod (49), a moving plate (50) is sleeved on the outer wall of the third rotating rod (49), the threads of the third rotating rod (49) and the moving plate (50) match, the sliding groove (58) is sleeved on the outer wall of the moving plate (50), a second clamping block (51) is fixedly connected to the side wall of the moving plate (50), an elastic torsion rod (52) is detachably connected to the inside of the second clamping block (51), a first fixing bolt (53) is detachably connected to the side wall of the second clamping block (51), an elastic torque sensor (54) is fixedly connected to the side wall of the elastic torsion rod (52), and a first rotating shaft (3) is fixedly connected to the side wall of the elastic torque sensor (54).

7. The rocket engine nozzle simulation load device according to claim 1, characterized in that: The equidistantly arranged hydraulic cylinders (24) are connected via hydraulic oil pipes, and the hydraulic cylinders (24) and the proportional pressure reducing valve (55) are connected via hydraulic oil pipes.

8. The rocket engine nozzle simulation load device according to claim 1, characterized in that: The side wall of the inertia disk (12) is detachably connected to an inertia block (56), the side wall of the inertia block (56) is detachably connected to a second fixing bolt (57), and the side wall of the second fixing bolt (57) is detachably connected to the inertia disk (12).

9. The rocket engine nozzle simulation load device according to claim 1, characterized in that: The constant torque sensor (14) is fixedly connected to a side of the third rotating shaft (11) close to the inertia disk (12), and the friction torque sensor (19) is fixedly connected to a side of the third rotating shaft (11) close to the first gear (8).

10. The rocket engine nozzle simulation load device according to claim 3, characterized in that: The infrared sensor (33) and the signal processor (35) are fixedly connected to a fixed plate (2) close to the first gear (8).

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