An electric drive system for simulating device overload acceleration, deceleration, and braking recovery

Abstract

This application provides an electric drive system for simulating overload acceleration descent and braking recovery of equipment, relating to the field of aerospace technology. The system includes a lifting and braking system, an acceleration descent system, a control system, and a guiding device. The electric drive system provided by this application can smoothly lift the experimental equipment, and then, according to an acceleration control curve, achieve high-speed descent and smooth braking. This system can be used to conduct such experiments in a laboratory environment, has low manufacturing costs, and is convenient and quick to implement. It can meet the descent requirements of large-mass experimental equipment with different overload accelerations according to experimental conditions, and can be widely used in similar experiments.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, specifically an electric drive system for simulating equipment overload acceleration during descent and braking recovery. Background Technology

[0002] With the rapid development of aerospace technology, long-term on-orbit spacecraft undergo orbital maneuvers, attitude adjustments, and reusable recovery processes. During these flights, they are subjected to different mechanical environments, such as static microgravity and overload acceleration. This causes changes in the propellant flow pattern within the tanks, as well as drastic changes in internal pressure and temperature, which greatly affect the normal operation of engines and related equipment. Summary of the Invention

[0003] To address one of the aforementioned technical deficiencies, and to simulate and predict the fluid characteristic changes of equipment under different overload environments in the ground environment, this application provides an electric drive system for simulating equipment overload acceleration descent and braking recovery.

[0004] According to an embodiment of this application, an electric drive system for simulating equipment overload acceleration descent and brake recovery is provided, including a lifting braking system, an acceleration descent system, a control system, and a guiding device;

[0005] The lifting and braking system is used to achieve steady lifting and high-level braking of the experimental equipment, and to brake the high-speed experimental equipment after its accelerated descent. It includes a lifting motor, a lifting reducer, an electromagnetic clutch, a brake drum, a brake disc, and a brake. The lifting reducer is driven by the lifting motor, the electromagnetic clutch is installed at the output end of the lifting reducer, and the brake drum is installed at the output end of the electromagnetic clutch. The lifting motor provides power for lifting the experimental equipment and works with the lifting reducer to output a stable lifting torque. The brake drum is used for winding and releasing the lifting wire rope. The brake is matched with the brake disc. Upon receiving a braking control command, the brake engages the brake disc to brake the rotating brake drum. The electromagnetic clutch is used to connect and disconnect the lifting reducer and the brake drum. When lifting the experimental equipment, the lifting reducer and the brake drum are connected via the electromagnetic clutch. The lifting motor drives the brake drum to rotate through the lifting reducer and the electromagnetic clutch, causing the lifting wire rope to wind and lift the experimental equipment to a high position. Before the experimental equipment accelerates its descent, the electromagnetic clutch disengages from the connection between the lifting reducer and the brake drum.

[0006] The accelerated descent system is used to enable the experimental equipment to accelerate its descent according to a set acceleration curve. It includes a descent motor, a descent reducer, a descent drum, a torque sensor, a reducer-end coupling, and a motor-end coupling. Two descent motors are respectively driven by the descent reducer and drive it synchronously. The output end of each descent motor is connected to the descent reducer in sequence via the motor-end coupling, the torque sensor, and the reducer-end coupling. The descent drum is installed at the output end of the descent reducer and is used to wind and release the descent wire rope. The descent reducer drives the descent drum to rotate, causing the descent wire rope to drive the experimental equipment to accelerate its descent according to the set acceleration control curve. The torque sensor is used to test the output torque of the descent motors. By analyzing the measured output torque, the system controls the motor output torque and the synchronization characteristics of the two descent motors.

[0007] The control system is used to control the drive motor, brake, clutch, and limit switch during the test system process, and to collect the output torque of the falling motor and the acceleration value of the test equipment. According to the test procedure, it realizes the variable acceleration falling test of the test equipment and the braking control function.

[0008] The guiding device is used to prevent the experimental equipment from rotating or swaying during lifting and accelerated descent. It includes a connecting base, guide steel wire ropes, limit switches, and guide wheel sets. The two ends of a pair of vertically arranged guide steel wire ropes are respectively fixed by the connecting base. The limit switches are installed on the upper part of the guide steel wire ropes. Several guide wheel sets are sleeved on the pair of guide steel wire ropes. The outer wall of the platform for placing the experimental equipment is connected to the guide steel wire ropes through the guide wheel sets.

[0009] During the test preparation phase, the experimental equipment is lifted to a set height by the lifting and braking system. After touching the limit switch, the experimental equipment is braked, the electromagnetic clutch is opened, and the connection between the brake drum and the lifting motor is disconnected.

[0010] After the test begins, the brake is released, and the acceleration descent motor is started simultaneously. The descent motor provides the experimental equipment with downward acceleration driving force, which drives the descent steel wire rope to move linearly through the guide wheel group and the descent drum, thus changing the rotation speed of the descent motor to the variable acceleration descent of the experimental equipment. After the acceleration descent phase ends, the brake is activated to decelerate the experimental equipment to a standstill, completing one test.

[0011] Preferably, the control system includes a host computer, a controller, and an overload sensor. The limit switch, the controller, and the overload sensor are respectively connected to the host computer for control. The overload sensor is used to monitor the acceleration of the experimental equipment to ensure that the load moves according to the set acceleration curve.

[0012] Preferably, the brake drum is provided with a first rope-stopping roller to prevent the lifting wire rope from getting tangled and jumping when the brake drum rotates at high speed.

[0013] Preferably, the falling drum is provided with a second rope-stopping roller to prevent the falling wire rope from getting tangled and jumping when the falling drum rotates at high speed.

[0014] The electric drive system provided in this embodiment for simulating overload acceleration and regenerative braking of equipment can achieve smooth lifting of the experimental equipment, followed by high-speed descent and smooth braking according to the acceleration control curve. This system can be used to conduct such tests in a laboratory environment, has low manufacturing costs, and is convenient and quick to implement. It can meet the different overload acceleration requirements of large-mass experimental equipment according to test conditions and can be widely used in similar tests. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A schematic diagram of the system principle of an electric drive system for simulating equipment overload acceleration and regenerative braking, provided in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the lifting braking system provided in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of the accelerated descent system provided in the embodiments of this application;

[0019] Figure 4 This is a schematic diagram of the guiding device provided in an embodiment of this application.

[0020] Figure label:

[0021] 1. Lifting motor; 2. Lifting reducer; 3. Electromagnetic clutch; 4. Brake drum; 5. Brake disc; 6. Brake; 7. Rope guide roller; 8. Falling motor; 9. Falling reducer; 10. Reducer end coupling; 11. Torque sensor; 12. Motor end coupling; 13. Falling drum; 14. Rope guide roller; 15. Connecting base; 16. Guide wire rope; 17. Limit switch; 18. Guide wheel assembly. Detailed Implementation

[0022] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] In the process of developing this application, the inventors discovered that the existing electric drive system for overload acceleration descent and braking recovery of simulation equipment has technical problems such as being unable to meet various requirements for smooth lifting and controllable acceleration descent of the equipment, high manufacturing costs, and inconvenience in testing.

[0024] To address the aforementioned issues, this application provides an electric drive system for simulating overload acceleration and regenerative braking of equipment. This system enables the smooth lifting of experimental equipment, followed by high-speed descent and smooth braking according to an acceleration control curve. This system allows for laboratory testing, has low manufacturing costs, and facilitates convenient and rapid testing. It can meet the descent requirements of large-mass experimental equipment with varying overload accelerations based on test conditions and can be widely applied in similar experiments.

[0025] Therefore, the technical solution of this application will be described through the following specific embodiments.

[0026] See Figure 1-4

[0027] An electric drive system for simulating equipment overload acceleration descent and regenerative braking includes a lifting and braking system, an acceleration descent system, a control system, and a guiding device.

[0028] Upgrade the components of the braking system, such as Figure 2 As shown, the system includes a lifting motor 1, a lifting reducer 2, an electromagnetic clutch 3, a brake drum 4, a brake disc 5, and a brake 6. The lifting and braking system is used to achieve steady lifting and high-position braking of the experimental equipment, and to brake the high-speed experimental equipment after its accelerated descent.

[0029] The lifting motor 1 provides power for lifting the experimental equipment. In conjunction with the lifting reducer 2, it outputs a stable lifting torque to steadily lift the experimental equipment to the designated height, preparing it for accelerated descent.

[0030] The brake drum 4 is used to wind and release the lifting wire rope. The drum is equipped with a rope-blocking roller 7 to prevent the wire rope from getting tangled and jumping when the brake drum 4 rotates at high speed.

[0031] The brake 6, in conjunction with the brake disc 5, generates friction to brake the rotating brake drum 4 by gripping the brake disc 5 after receiving a braking control command.

[0032] The electromagnetic clutch 3 is used to connect and disconnect the lifting reducer 2 and the brake drum 4. When the experimental equipment is lifted, the lifting reducer 2 and the brake drum 4 are connected through the clutch 3. The lifting motor 1 drives the brake drum 4 and the lifting wire rope to lift the experimental equipment to a high position through the lifting reducer 2 and the clutch 3. Before the experimental equipment accelerates down, the clutch 3 disengages from the lifting reducer 2 and the brake drum 4 to reduce the energy consumption of the system due to the rotational inertia of the lifting motor 1 and the lifting reducer 2 during the fall of the experimental equipment, and to increase the starting speed of the falling motor.

[0033] It is feasible, such as Figure 1 As shown, the lifting wire rope is divided into three sections by a set of guide pulleys (the specific location is shown in the figure). The first section is located between the lifting braking system and the guide pulley above it. The second section is located between the two horizontally arranged guide pulleys shown in the figure. The third section is located between the guide pulley and the platform used to hold the experimental equipment. Similarly, the lowering wire rope is divided into two sections by a set of guide pulleys (the specific location is shown in the figure). The first section is located between the acceleration and lowering system and the guide pulley, and the second section is located between the guide pulley and the load directly above it. To maintain the stability of the experimental equipment during movement (lifting or lowering), the ends of the lifting and lowering wire ropes are connected to the platform using matching locking devices.

[0034] Acceleration descent system such as Figure 3 As shown, the system includes two falling motors 8, a falling reducer 9, a falling drum 13, a torque sensor 11, a reducer end coupling 10, and a motor end coupling 12. The accelerated falling system is used to enable the experimental equipment to fall at an accelerated speed according to a set acceleration curve.

[0035] Two falling motors 8 synchronously drive the falling reducer 9, which in turn drives the falling drum 13 to rotate, causing the wire rope to drive the experimental equipment to fall at an accelerated speed according to the set acceleration control curve.

[0036] The falling drum 13 is used to wind and release the falling wire rope. The falling drum 13 is equipped with a rope-blocking roller 14 to prevent the wire rope from getting tangled and jumping when the falling drum 13 rotates at high speed.

[0037] The torque sensor 11 is used to test the output torque of the two falling motors 8. By analyzing the measured data, the output torque of the motors and the synchronization characteristics of the two motors are controlled.

[0038] The control system includes a host computer, controller, overload sensor, and limit switch. It is used to control the drive motor, brake, clutch, and limit switch during the test system process, and to collect the output torque of the falling motor and the acceleration value of the test equipment. According to the test procedure, it realizes the variable acceleration falling test and braking control functions of the test equipment.

[0039] Guiding devices such as Figure 4 As shown, it includes a connecting base 15, a guide wire rope 16, a limit switch 17, and a guide wheel assembly 18, which are used to prevent the experimental equipment from rotating or swaying during the lifting and accelerated descent process.

[0040] During the test preparation phase, the experimental equipment is lifted to the set height by the lifting and braking system and braked after touching the limit switch 17. The clutch 3 of the lifting and braking system is then disengaged, separating the brake drum 4 from the lifting motor 1. Once the test begins, the brake 6 is released, and the acceleration descent motor 8 is simultaneously activated. The descent motor 8 provides the system with downward acceleration, driving the steel wire rope linearly through the guide pulley and descent drum 13, thus changing the rotation speed of the descent motor 8 to achieve variable-acceleration descent of the experimental equipment. After the acceleration descent phase ends, the brake 6 is activated to decelerate the experimental equipment to a standstill, completing one test.

[0041] The motor drive system described in this invention enables the smooth lifting of experimental equipment, followed by high-speed descent and smooth braking according to an acceleration control curve. This system allows for laboratory testing, has low manufacturing costs, and facilitates convenient and rapid testing. It can meet the descent requirements of large-mass experimental equipment with varying overload accelerations based on test conditions and can be widely applied in similar experiments.

[0042] In this embodiment, a motor-driven drum is used to wind and release the steel wire rope. The motor, as the power source, enables the high-speed descent of a 2-ton load experimental device. Within 1 second of descent, the average overload acceleration of the load experimental device reaches 0.6g, and the overload duration is 0.6s. Simultaneously, the entire system has a braking function; the braking process of the load experimental device is smooth, with a maximum braking acceleration of 2g. This application successfully simulates the mechanical environment of overload acceleration of a load experimental device within a limited test site and altitude, providing a reliable test system for ground testing of flight experimental equipment and effectively reducing the development cycle and cost of flight experimental equipment.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a unit. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0047] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An electric drive system for simulating equipment overload acceleration and regenerative braking, characterized in that, This includes a lifting braking system, an acceleration and descent system, a control system, and a guiding device; The lifting and braking system is used to achieve steady lifting and high-level braking of the experimental equipment, and to brake the high-speed experimental equipment after its accelerated descent. It includes a lifting motor, a lifting reducer, an electromagnetic clutch, a brake drum, a brake disc, and a brake. The lifting reducer is driven by the lifting motor, the electromagnetic clutch is installed at the output end of the lifting reducer, and the brake drum is installed at the output end of the electromagnetic clutch. The lifting motor provides power for lifting the experimental equipment and works with the lifting reducer to output a stable lifting torque. The brake drum is used for winding and releasing the lifting wire rope. The brake is matched with the brake disc. Upon receiving a braking control command, the brake engages the brake disc to brake the rotating brake drum. The electromagnetic clutch is used to connect and disconnect the lifting reducer and the brake drum. When lifting the experimental equipment, the lifting reducer and the brake drum are connected via the electromagnetic clutch. The lifting motor drives the brake drum to rotate through the lifting reducer and the electromagnetic clutch, causing the lifting wire rope to wind and lift the experimental equipment to a high position. Before the experimental equipment accelerates its descent, the electromagnetic clutch disengages from the connection between the lifting reducer and the brake drum. The accelerated descent system is used to enable the experimental equipment to accelerate its descent according to a set acceleration curve. It includes a descent motor, a descent reducer, a descent drum, a torque sensor, a reducer-end coupling, and a motor-end coupling. Two descent motors are respectively driven by the descent reducer and drive it synchronously. The output end of each descent motor is connected to the descent reducer in sequence via the motor-end coupling, the torque sensor, and the reducer-end coupling. The descent drum is installed at the output end of the descent reducer and is used to wind and release the descent wire rope. The reducer drives the descent drum to rotate, causing the descent wire rope to drive the experimental equipment to accelerate its descent according to the set acceleration control curve. The torque sensor is used to test the output torque of the descent motors. By analyzing the measured output torque, the system controls the motor output torque and the synchronization characteristics of the two descent motors. The control system is used to control the drive motor, brake, clutch, and limit switch during the test system process, and to collect the output torque of the falling motor and the acceleration value of the test equipment. According to the test procedure, it realizes the variable acceleration falling test of the test equipment and the braking control function. The guiding device is used to prevent the experimental equipment from rotating or swaying during lifting and accelerated descent. It includes a connecting base, guide steel wire ropes, limit switches, and guide wheel sets. The two ends of a pair of vertically arranged guide steel wire ropes are respectively fixed by the connecting base. The limit switches are installed on the upper part of the guide steel wire ropes. Several guide wheel sets are sleeved on the pair of guide steel wire ropes. The outer wall of the platform for placing the experimental equipment is connected to the guide steel wire ropes through the guide wheel sets. During the test preparation phase, the experimental equipment is lifted to a set height by the lifting and braking system. After touching the limit switch, the experimental equipment is braked, the electromagnetic clutch is opened, and the connection between the brake drum and the lifting motor is disconnected. After the test begins, the brake is released, and the acceleration descent motor is started simultaneously. The descent motor provides the experimental equipment with downward acceleration driving force, which drives the descent steel wire rope to move linearly through the guide wheel group and the descent drum, thus changing the rotation speed of the descent motor to the variable acceleration descent of the experimental equipment. After the acceleration descent phase ends, the brake is activated to decelerate the experimental equipment to a standstill, completing one test.

2. The electric drive system for simulating equipment overload acceleration and regenerative braking according to claim 1, characterized in that, The control system includes a host computer, a controller, and an overload sensor. The limit switch, the controller, and the overload sensor are respectively connected to the host computer. The overload sensor is used to monitor the acceleration of the experimental equipment to ensure that the load moves according to the set acceleration curve.

3. The electric drive system for simulating equipment overload acceleration and regenerative braking according to claim 1, characterized in that, The brake drum is equipped with a first rope-blocking roller to prevent the lifting wire rope from getting tangled and jumping when the brake drum rotates at high speed.

4. The electric drive system for simulating equipment overload acceleration and regenerative braking according to claim 1, characterized in that, The falling drum is equipped with a second rope-blocking roller to prevent the falling wire rope from becoming tangled and jumping when the falling drum rotates at high speed.

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