A device and method for testing the disengagement speed of an overrunning clutch

Abstract

The present invention discloses a device and method for testing the disengagement speed of an overrunning clutch. The device comprises an input shaft, an output shaft, a DC resistance tester, and a load motor. The output shaft is connected to the inner ring of the clutch. The input shaft is connected to the outer ring of the clutch and has a first state in which the outer ring of the clutch is driven to gradually accelerate in an overrunning direction, and a second state in which the outer ring of the clutch is driven to gradually accelerate in an engaging direction. The input shaft is provided with a first speed sensor for detecting its speed, and the first speed sensor is configured to transmit the speed value to a controller. The DC resistance tester is configured to measure a first resistance value of the clutch and transmit the value to the controller. The controller compares the first resistance value with a standard resistance value to obtain an adjustment instruction and controls the input shaft to stop according to the adjustment instruction. The load motor has a third state in which it is connected to the output shaft and a fourth state in which it is disconnected from the output shaft. The present invention is capable of conducting clutch disengagement speed tests in both the overrunning state and the starting state.

Description

Technical Field

[0001] The present invention relates to the technical field of overrunning clutch test and testing, and in particular to an overrunning clutch disengagement speed testing device and a disengagement speed testing method. Background Art

[0002] Aircraft engines are generally started by a starter installed on the accessory drive system. The starter needs to rotate the gas generator rotor to a certain speed ratio before the aircraft engine can self-sustain and start to a stable operating speed. Otherwise, the aircraft engine may overheat and cause starting failure. After successful starting, a centrifugal disengagement clutch is generally used to disconnect the starter torque.

[0003] The disengagement speed of the overrunning clutch directly affects the design of the accessory drive chain. During design, on the one hand, the full-speed overrunning speed of the clutch should be greater than the disengagement speed in the clutch overrunning state. Otherwise, the eccentric roller of the clutch cannot throw off the inner ring of the clutch in the working state, which will cause sliding friction between the eccentric roller and the inner ring, causing its wear to increase. On the other hand, the maximum speed at which the starter belt is driven to the clutch when the aircraft engine is started should be less than the disengagement speed in the clutch engaged state. Otherwise, the clutch will disengage in the starting state, making it impossible for the starter to drive the gas generator rotor to the maximum speed, which is prone to overheating and causing starting failure. Therefore, verifying the correctness of theoretical calculations through overrunning clutch disengagement speed test plays a very critical role in improving the forward design capability of the clutch.

[0004] At present, the speed test of aircraft engine overrunning clutch disengagement is mainly determined by measuring the change of clutch friction torque. Figure 1 As shown, the traditional aircraft engine overrunning clutch disengagement speed test equipment is mainly composed of a power motor 1, a coupling 2, a speed increaser 3, a clutch test piece 4 and a torque sensor 5. The output end of the power motor 1 is connected to the outer ring of the clutch test piece, and the torque sensor 5 is connected to the inner ring of the clutch test piece. During the test, the power motor 1 is started in the clutch overrunning direction, and the torque sensor 5 is used to measure the friction torque of the clutch from the inner ring of the clutch. The clutch disengagement speed is obtained by testing the change in the clutch friction torque.

[0005] However, the above-mentioned traditional aircraft engine overrunning clutch disengagement speed test equipment can only measure the clutch disengagement speed in the overrunning state, and cannot measure the clutch disengagement speed in the starting state; therefore, there is an urgent need for a test device that can measure the disengagement speed of the aircraft engine overrunning clutch in the overrunning state and the disengagement speed of the aircraft engine in the starting state. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art of lacking a disengagement speed testing device that can realize both the disengagement speed test of the overtaking clutch in the overtaking state and the disengagement speed test of the overtaking clutch in the starting state, thereby providing an overtaking clutch disengagement speed testing device and a disengagement speed testing method.

[0007] According to a first aspect of the present invention, a device for testing the disengagement speed of an overrunning clutch is provided, comprising:

[0008] test platform;

[0009] Output shaft, used to connect to the inner ring of the clutch;

[0010] an input shaft for connecting to the clutch outer ring, wherein the input shaft has a first state for driving the clutch outer ring to gradually accelerate in an overrunning direction, and a second state for driving the clutch outer ring to gradually accelerate in an engaging direction;

[0011] a first speed sensor, disposed on the input shaft, and configured to detect a first speed when the input shaft is in a first state and a second speed when the input shaft is in a second state, and transmit the first speed and the second speed to a controller;

[0012] a DC resistance tester, wherein a first end and a second end are connected to the clutch inner ring and the clutch outer ring, respectively, and are used to measure a first resistance value, wherein the DC resistance tester transmits the first resistance value to the controller, and the controller compares the first resistance value with a standard resistance value, outputs an adjustment instruction when the first resistance value is greater than the standard resistance value, and controls the input shaft to stop according to the adjustment instruction;

[0013] The load motor is arranged on the test platform and has a third state of being connected to the output shaft and applying a working load, and a fourth state of being disconnected from the output shaft.

[0014] The overrunning clutch disengagement speed test device according to the present invention has at least the following technical effects:

[0015] By switching the input shaft between the first state and the second state, and switching the load motor between the third state and the fourth state; when testing the disengagement speed of the overrunning clutch in the overrunning state, the input shaft is switched to the first state and the load motor is switched to the fourth state, and the first end and the second end of the DC resistance tester are respectively connected to the clutch inner ring and the clutch outer ring, and then the input shaft drives the clutch outer ring to gradually accelerate from zero speed in the overrunning direction. At the beginning, because the eccentric roller of the overrunning clutch contacts the clutch inner ring, the first resistance value measured by the DC resistance tester is a small resistance and is smaller than the standard resistance value. As the clutch outer ring accelerates in the overrunning direction until the eccentric roller of the overrunning clutch disengages from the clutch inner ring, the first resistance value measured by the DC resistance tester is a high resistance and is larger than the standard resistance value. At this time, the first speed measured by the first speed sensor for the input shaft corresponding to the first state is the clutch disengagement speed in the overrunning state. When testing the disengagement speed of the overrunning clutch in the starting state, the load motor is switched to the third state to apply the actual working load to the output shaft, and the input shaft is switched to the second state. Then the input shaft drives the outer ring of the clutch to gradually accelerate from zero speed in the engagement direction. At the beginning, because the eccentric roller of the overrunning clutch contacts the inner ring of the clutch, the first resistance value measured by the DC resistance tester is a small resistance and less than the standard resistance value. As the outer ring of the clutch accelerates in the engagement direction until the eccentric roller of the overrunning clutch disengages from the inner ring of the clutch, the first resistance value measured by the DC resistance tester is a high resistance and greater than the standard resistance value. At this time, the second speed measured by the first speed sensor for the input shaft in the second state is the clutch disengagement speed in the starting state; it is achieved that the clutch disengagement speed test in the overrunning state and the clutch disengagement speed test in the starting state can be carried out in the same test device, which is conducive to improving the positive design capability of the clutch.

[0016] In an optional embodiment, the output shaft is provided with a first conductive slip ring, the input shaft is provided with a second conductive slip ring, the first end of the DC resistance tester is connected to the first conductive slip ring, and the second end of the DC resistance tester is connected to the second conductive slip ring.

[0017] In an optional implementation, a DC power supply is connected between the second end of the DC resistance tester and the second conductive slip ring.

[0018] In an optional embodiment, a first insulating adapter sleeve coupling is provided between the load motor in the third state and the output shaft.

[0019] In an optional embodiment, a driving motor is further provided on the test platform, and an output end of the driving motor is connected to the input shaft.

[0020] In an optional embodiment, a second insulating adapter sleeve coupling is provided between the drive motor and the input shaft.

[0021] In an optional embodiment, a second speed sensor is further included on the output shaft, and the second speed sensor is used to detect the speed of the output shaft to obtain a third speed, and transmit the third speed to the controller; the controller compares the second speed and the third speed, and outputs the adjustment instruction when the difference between the second speed and the third speed is greater than the standard speed difference.

[0022] According to a second aspect of the present invention, a disengagement speed test method is provided, which is applied to the overrunning clutch disengagement speed test device provided in the first aspect. The disengagement speed test method comprises the following steps:

[0023] Switching the load motor to the fourth state;

[0024] Switch the input shaft to the first state, driving the outer ring of the clutch to gradually accelerate in the overtaking direction;

[0025] detecting the rotation speed of the input shaft by a first rotation speed sensor to obtain a first rotation speed, and transmitting the first rotation speed to a controller;

[0026] measuring a first resistance value of the clutch when the input shaft is in a first state using a DC resistance tester, and transmitting the first resistance value of the clutch when the input shaft is in the first state to the controller;

[0027] The controller compares a first resistance value of the clutch when the input shaft is in the first state with a standard resistance value, outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft is in the first state, controls the input shaft to stop according to the adjustment instruction, and uses the corresponding first speed as a disengagement speed of the overrunning clutch in the overrunning state;

[0028] Switching the load motor to the third state and applying a set working load to the output shaft;

[0029] Switching the input shaft to a second state, driving the outer ring of the clutch to gradually accelerate in the engagement direction;

[0030] detecting the rotational speed of the input shaft by the first rotational speed sensor to obtain a second rotational speed, and transmitting the second rotational speed to the controller;

[0031] measuring a first resistance value of the clutch when the input shaft is in the second state using the DC resistance tester, and transmitting the first resistance value of the clutch when the input shaft is in the second state to the controller;

[0032] The controller compares the first resistance value of the clutch when the input shaft is in the second state with a standard resistance value, and outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft is in the second state. The input shaft is controlled to stop according to the adjustment instruction, and the corresponding second speed is output as the disengagement speed of the overrunning clutch in the starting state.

[0033] A disengagement speed test method according to the present invention has at least the following technical effects:

[0034] By switching the input shaft between the first state and the second state, and switching the load motor between the third state and the fourth state; when testing the disengagement speed of the overrunning clutch in the overrunning state, the input shaft is switched to the first state and the load motor is switched to the fourth state, and the first end and the second end of the DC resistance tester are respectively connected to the clutch inner ring and the clutch outer ring, and then the input shaft drives the clutch outer ring to gradually accelerate from zero speed in the overrunning direction. At the beginning, because the eccentric roller of the overrunning clutch contacts the clutch inner ring, the first resistance value measured by the DC resistance tester is a small resistance and is smaller than the standard resistance value. As the clutch outer ring accelerates in the overrunning direction until the eccentric roller of the overrunning clutch disengages from the clutch inner ring, the first resistance value measured by the DC resistance tester is a high resistance and is larger than the standard resistance value. At this time, the first speed measured by the first speed sensor for the input shaft corresponding to the first state is the clutch disengagement speed in the overrunning state. When testing the disengagement speed of the overrunning clutch in the starting state, the load motor is switched to the third state to apply the actual working load to the output shaft, and the input shaft is switched to the second state. Then the input shaft drives the outer ring of the clutch to gradually accelerate from zero speed in the engagement direction. At the beginning, because the eccentric roller of the overrunning clutch contacts the inner ring of the clutch, the first resistance value measured by the DC resistance tester is a small resistance and less than the standard resistance value. As the outer ring of the clutch accelerates in the engagement direction until the eccentric roller of the overrunning clutch disengages from the inner ring of the clutch, the first resistance value measured by the DC resistance tester is a high resistance and greater than the standard resistance value. At this time, the second speed measured by the first speed sensor for the input shaft in the second state is the clutch disengagement speed in the starting state; it is achieved that the clutch disengagement speed test in the overrunning state and the clutch disengagement speed test in the starting state can be carried out in the same test device, which is conducive to improving the positive design capability of the clutch.

[0035] In an optional embodiment, after transmitting the first resistance value of the clutch when the input shaft is in the first state to the controller, it also includes generating a first relationship curve according to the first speed and the first resistance value of the clutch when the input shaft is in the first state, and outputting the first relationship curve.

[0036] In an optional embodiment, after transmitting the first resistance value of the clutch when the input shaft is in the second state to the controller, it also includes generating a second relationship curve according to the second speed and the first resistance value of the clutch when the input shaft is in the second state, and outputting the second relationship curve.

[0037] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic diagram of the structure of a conventional aircraft engine overrunning clutch disengagement speed test equipment;

[0040] Figure 2 Schematic diagram of the structure of an overrunning clutch disengagement speed testing device according to this embodiment.

[0041] Description of reference numerals:

[0042] 1-power motor, 2-coupling, 3-speed increaser, 4-clutch test piece, 5-torque sensor;

[0043] 100-output shaft, 110-first conductive slip ring, 120-second conductive slip ring, 200-input shaft, 310-clutch inner ring, 320-clutch outer ring, 330-eccentric roller, 340-casing, 350-insulated bearing, 400-controller, 500-DC resistance tester, 600-load motor, 610-first insulating adapter sleeve coupling, 700-DC power supply, 800-drive motor, 810-second insulating adapter sleeve coupling. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this embodiment and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this embodiment. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0047] The speed of the overrunning clutch disengagement directly affects the design of the accessory drive chain. The correctness of the theoretical calculation is verified by the overrunning clutch disengagement speed test, which plays a very critical role in improving the forward design capability of the clutch. Figure 1 As shown, the aircraft engine overrunning clutch disengagement speed test equipment of the related technology is mainly composed of a power motor 1, a coupling 2, a speed increaser 3, a clutch test piece 4 and a torque sensor 5. The output end of the power motor 1 is connected to the outer ring of the clutch test piece 4, and the torque sensor 5 is connected to the inner ring of the clutch test piece 4. During the test, the power motor 1 is started in the clutch overrunning direction, and the torque sensor 5 is used to measure the friction torque of the clutch from the inner ring 310 of the clutch. The clutch disengagement speed is obtained by testing the change in the clutch friction torque; however, the above-mentioned disengagement speed test equipment can only measure the clutch disengagement speed in the overrunning state, and cannot measure the clutch disengagement speed in the starting state; and the clutch friction torque is very small, requiring the torque sensor 5 to have high test accuracy and sampling frequency, which is inconvenient to implement and costly; in order to solve the above-mentioned technical defects, an overrunning clutch disengagement speed test device and a disengagement speed test method according to an embodiment of the present invention are provided.

[0048] The following combination Figure 2 , describing embodiments of the present invention.

[0049] According to a first aspect of an embodiment of the present invention, a device for testing the disengagement speed of an overrunning clutch is provided, comprising a test platform, an input shaft 200, an output shaft 100, and a DC resistance tester 500; the output shaft 100 is used to connect to a clutch inner ring 310, the input shaft 200 is used to connect to a clutch outer ring 320, the input shaft 200 has a first state in which the clutch outer ring 320 is driven to gradually accelerate in an overrunning direction, and a second state in which the clutch outer ring 320 is driven to gradually accelerate in an engagement direction; the input shaft 200 is provided with a first speed sensor, the first speed sensor being used to detect a first speed of the input shaft 200 when in the first state and a second speed of the input shaft 200 when in the second state, and the first speed sensor being used to detect a first speed of the input shaft 200 when in the first state and a second speed of the input shaft 200 when in the second state, and the second speed sensor being used to detect a first speed of the input shaft 200 when in the first state and a second speed of the input shaft 200 when in the second state, and the first ... A first speed and a second speed are transmitted to the controller 400; the first end and the second end of the DC resistance tester 500 are respectively connected to the clutch inner ring 310 and the clutch outer ring 320, and are used to measure a first resistance value, the DC resistance tester 500 transmits the first resistance value to the controller 400, the controller 400 compares the first resistance value with the standard resistance value, and outputs an adjustment instruction when the first resistance value is greater than the standard resistance value, and controls the input shaft 200 to stop according to the adjustment instruction; the test platform is provided with a load motor 600, and the load motor 600 has a third state of being connected to the output shaft 100 and applying a working load, and a fourth state of being disconnected from the output shaft 100.

[0050] The disengagement speed test device of this embodiment switches the input shaft 200 between the first state and the second state, and switches the load motor 600 between the third state and the fourth state; when testing the disengagement speed of the overrunning clutch in the overrunning state, the input shaft 200 is switched to the first state and the load motor 600 is switched to the fourth state, and the first end and the second end of the DC resistance tester 500 are connected to the clutch inner ring 310 and the clutch outer ring 320 respectively, and then the input shaft 200 drives the clutch outer ring 320 to gradually increase from zero speed to the fourth state in the overrunning direction. Gradually accelerate, at the beginning, because the eccentric roller 330 of the overrunning clutch contacts the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a small resistance and is smaller than the standard resistance value. As the clutch outer ring 320 accelerates in the overrunning direction until the eccentric roller 330 of the overrunning clutch disengages from the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a high resistance and is larger than the standard resistance value. At this time, the first speed measured by the first speed sensor corresponding to the input shaft 200 in the first state is the clutch disengagement speed in the overrunning state. When testing the disengagement speed of the overrunning clutch in the starting state, the load motor 600 is switched to the third state to apply the actual working load to the output shaft 100, and the input shaft 200 is switched to the second state. Then, the input shaft 200 drives the clutch outer ring 320 to gradually accelerate from zero speed in the engagement direction. At the beginning, because the eccentric roller 330 of the overrunning clutch contacts the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a small resistance and less than the standard resistance value. As the clutch outer ring 320 accelerates in the engagement direction until the eccentric roller 330 of the overrunning clutch disengages from the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a high resistance and greater than the standard resistance value. At this time, the second speed measured by the first speed sensor for the input shaft 200 in the second state is the clutch disengagement speed in the starting state; it is achieved that the clutch disengagement speed test in the overrunning state and the clutch disengagement speed test in the starting state can be carried out in the same test device, which is conducive to improving the positive design capability of the clutch.

[0051] It should be noted that this embodiment utilizes the principle of interface resistance to implement clutch disengagement speed testing. When the clutch's eccentric roller 330 contacts the clutch inner ring 310, the clutch outer ring 320, the clutch inner ring 310, and the DC resistance tester 500 form a closed circuit. Therefore, the resistance value measured by the DC resistance tester 500 is low and lower than the standard resistance value. When the clutch's eccentric roller 330 disengages from the clutch inner ring 310, the circuit formed by the clutch outer ring 320, the clutch inner ring 310, and the DC resistance tester 500 is disconnected. Therefore, the resistance value measured by the DC resistance tester 500 is low and higher than the standard resistance value. That is, this embodiment uses a DC resistance tester 500 to read the resistance between the clutch outer ring 320 and the clutch inner ring 310 at different speeds in the overrunning or engaging direction to determine whether the eccentric roller 330 is lifted. This indirectly determines the clutch disengagement speed in the overrunning or starting state. Compared to using a torque sensor 5 with high test accuracy and sampling frequency to measure changes in the clutch friction torque to determine the clutch disengagement speed, this embodiment's test is easier to implement, has high test accuracy, and good repeatability. Because this embodiment's test is easy to implement and has good repeatability, when conducting clutch disengagement speed tests in the overrunning or starting state, the test process can be repeated multiple times on the same overrunning clutch test piece, and the average of the overrunning disengagement speeds or engaging disengagement speeds from the multiple tests can be taken as the final clutch overrunning disengagement speed or engaging disengagement speed, resulting in higher test accuracy.

[0052] It can be understood that the overrunning clutch test piece of this embodiment adopts a diagonal overrunning clutch for an aviation power system; and in order to avoid the formation of a circuit loop between the casing 340 of the overrunning clutch test piece, which may cause inaccurate data of the measured first resistance value, the bearing of the overrunning clutch test piece is set to an insulating bearing 350. The insulating bearing 350 can specifically be a hybrid ceramic ball bearing, a bearing coated with insulating paint on the outer surface, or a bearing with an insulating bushing on the outer surface.

[0053] It is understood that the overrunning direction refers to the direction in which the clutch outer ring 320 cannot drive the clutch inner ring 310 and the eccentric roller 330 slides and frictionally operates relative to the clutch inner ring 310. The engaging direction refers to the direction in which the clutch outer ring 320 drives the clutch inner ring 310.

[0054] It should be noted that the standard resistance value refers to a standard resistance value that is greater than the resistance value measured when the eccentric roller 330 of the clutch is not disengaged from the clutch inner ring 310, and is slightly less than or equal to the resistance value measured when the eccentric roller 330 of the clutch is disengaged from the clutch inner ring 310; the difference between the resistance value measured when the eccentric roller 330 of the clutch is disengaged from the clutch inner ring 310 and the resistance value measured when the eccentric roller 330 of the clutch is not disengaged from the clutch inner ring 310 exceeds the range of the DC resistance tester 500.

[0055] Specifically, the controller 400 is a computer or a single chip microcomputer.

[0056] In some embodiments, the output shaft 100 is provided with a first conductive slip ring 110, and the input shaft 200 is provided with a second conductive slip ring 120. The first end of the DC resistance tester 500 is connected to the first conductive slip ring 110, and the second end of the DC resistance tester 500 is connected to the second conductive slip ring 120. During the test, the electrical signals of the output shaft 100 and the input shaft 200 are respectively led out and transmitted to the first end and the second end of the DC resistance tester 500 through the first conductive slip ring 110 and the second conductive slip ring 120, forming a loop. This prevents the first end and the second end of the DC resistance tester 500 from rotating with the output shaft 100 and the input shaft 200, respectively, and effectively reduces the risk of the first end and the second end of the DC resistance tester 500 being broken by rotation.

[0057] Specifically, a DC power supply 700 is connected between the second end of the DC resistance tester 500 and the second conductive slip ring 120. The DC power supply 700 directly provides power to the DC resistance tester 500, reducing the need for external household circuits and simplifying the structure of this embodiment.

[0058] In some embodiments, a first insulating adapter sleeve coupling 610 is disposed between the load motor 600 and the output shaft 100 in the third state. The load of the sprag-type overrunning clutch used in aviation power systems is not large. Replacing the sleeve of the diaphragm coupling with a plastic connecting sleeve to form the first insulating adapter sleeve coupling 610 can both meet the requirement of applying actual operating loads to the output shaft 100 and prevent the formation of an electrical loop between the test platform and the test platform, which could cause inaccurate data on the measured first resistance value.

[0059] Specifically, the load motor 600 is slidably connected to the test platform, and the end of the load motor 600 is detachably connected to the output shaft 100 by bolts or interference fit, so as to switch the load motor 600 between the third state and the fourth state.

[0060] In some embodiments, the disengagement speed test device further includes a drive motor 800 disposed on the test platform, with an output end of the drive motor 800 connected to the input shaft 200. The drive motor 800 provides power to the input shaft 200 to gradually accelerate the clutch outer ring 320 from zero speed in the overtaking direction during the clutch disengagement speed test in the overtaking state, and to gradually accelerate the clutch outer ring 320 in the engagement direction during the clutch disengagement speed test in the starting state.

[0061] Specifically, a second insulating adapter sleeve coupling 810 is provided between the drive motor 800 and the input shaft 200 ; the second insulating adapter sleeve coupling 810 can prevent a circuit loop from being formed between the DC resistance tester 500 and the test platform, thereby preventing the measured first resistance value from being inaccurate.

[0062] In some embodiments, the disengagement speed test device further includes a second speed sensor provided on the output shaft 100. During the clutch disengagement speed test in the starting state, the second speed sensor is used to detect the speed of the output shaft 100 to obtain a third speed, and transmit the third speed to the controller 400. The controller 400 compares the second speed with the third speed, and outputs the adjustment instruction when the difference between the second speed and the third speed is greater than the standard speed difference. At this time, the controller 400 outputs the second speed measured by the first speed sensor for the input shaft 200 in the second state as the clutch disengagement speed in the starting state, and controls the input shaft 200 to stop and end the test according to the adjustment instruction. During the clutch disengagement speed test in the starting state, the clutch eccentric roller 330 is determined to be disengaged by using the two conditions of a sudden change in the measured first resistance value or the speed of the input shaft 200 being out of sync with the speed of the output shaft 100.

[0063] It should be noted that the standard speed difference refers to the difference between the speed of the input shaft 200 in the second state and the speed of the output shaft 100 when the eccentric roller 330 of the overrunning clutch is disengaged from the clutch inner ring 310 during the clutch disengagement speed test in the starting state.

[0064] According to a second aspect of an embodiment of the present invention, a disengagement speed test method is further provided, which is applied to the overrunning clutch disengagement speed test device provided in the first aspect of the embodiment of the present invention. The disengagement speed test method comprises the following steps:

[0065] Switching the load motor 600 to the fourth state;

[0066] Switch the input shaft 200 to the first state, driving the clutch outer ring 320 to gradually accelerate in the overtaking direction;

[0067] Detecting the rotation speed of the input shaft 200 by a first rotation speed sensor to obtain a first rotation speed, and transmitting the first rotation speed to the controller 400;

[0068] Using a DC resistance tester 500 to measure a first resistance value of the clutch when the input shaft 200 is in the first state, and transmitting the first resistance value of the clutch when the input shaft 200 is in the first state to the controller 400;

[0069] The controller 400 compares a first resistance value of the clutch when the input shaft 200 is in the first state with a standard resistance value, and outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft 200 is in the first state, controls the input shaft 200 to stop according to the adjustment instruction, and uses the corresponding first speed as the disengagement speed of the overrunning clutch in the overrunning state;

[0070] Switching the load motor 600 to the third state and applying a set working load to the output shaft 100;

[0071] Switch the input shaft 200 to the second state, driving the clutch outer ring 320 to gradually accelerate in the engagement direction;

[0072] detecting the rotation speed of the input shaft 200 by the first rotation speed sensor to obtain a second rotation speed, and transmitting the second rotation speed to the controller 400;

[0073] Using the DC resistance tester 500 to measure a first resistance value of the clutch when the input shaft 200 is in the second state, and transmitting the first resistance value of the clutch when the input shaft 200 is in the second state to the controller 400;

[0074] The controller 400 compares the first resistance value of the clutch when the input shaft 200 is in the second state with the standard resistance value, and outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft 200 is in the second state. According to the adjustment instruction, the input shaft 200 is controlled to stop, and the corresponding second speed is output as the disengagement speed of the overrunning clutch in the starting state.

[0075] The disengagement speed test method of this embodiment is to switch the input shaft 200 between the first state and the second state, and switch the load motor 600 between the third state and the fourth state; when testing the disengagement speed of the overrunning clutch in the overrunning state, the input shaft 200 is switched to the first state and the load motor 600 is switched to the fourth state, and the first end and the second end of the DC resistance tester 500 are connected to the clutch inner ring 310 and the clutch outer ring 320 respectively, and then the input shaft 200 drives the clutch outer ring 320 to gradually increase from zero speed to the fourth state in the overrunning direction. Gradually accelerate, at the beginning, because the eccentric roller 330 of the overrunning clutch contacts the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a small resistance and is smaller than the standard resistance value. As the clutch outer ring 320 accelerates in the overrunning direction until the eccentric roller 330 of the overrunning clutch disengages from the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a high resistance and is larger than the standard resistance value. At this time, the first speed measured by the first speed sensor corresponding to the input shaft 200 in the first state is the clutch disengagement speed in the overrunning state. When testing the disengagement speed of the overrunning clutch in the starting state, the load motor 600 is switched to the third state to apply the actual working load to the output shaft 100, and the input shaft 200 is switched to the second state. Then, the input shaft 200 drives the clutch outer ring 320 to gradually accelerate from zero speed in the engagement direction. At the beginning, because the eccentric roller 330 of the overrunning clutch contacts the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a small resistance and less than the standard resistance value. As the clutch outer ring 320 accelerates in the engagement direction until the eccentric roller 330 of the overrunning clutch disengages from the clutch inner ring 310, the first resistance value measured by the DC resistance tester 500 is a high resistance and greater than the standard resistance value. At this time, the second speed measured by the first speed sensor for the input shaft 200 in the second state is the clutch disengagement speed in the starting state; it is achieved that the clutch disengagement speed test in the overrunning state and the clutch disengagement speed test in the starting state can be carried out in the same test device, which is conducive to improving the positive design capability of the clutch.

[0076] Specifically, the corresponding first speed refers to the first speed detected by the first speed sensor when the first resistance value of the clutch is greater than the standard resistance value when the input shaft 200 is in the first state.

[0077] Specifically, the corresponding second speed refers to the second speed detected by the first speed sensor when the first resistance value of the clutch is greater than the standard resistance value when the input shaft 200 is in the second state.

[0078] In some embodiments, after the first resistance value of the clutch when the input shaft 200 is in the first state is transmitted to the controller 400, a first relationship curve is generated according to the first speed and the first resistance value of the clutch when the input shaft 200 is in the first state, and the first relationship curve is output; the first relationship curve is convenient for the test personnel to conduct visual observation, so as to more intuitively understand that in the process of conducting the clutch disengagement speed test in the overtaking state, the state of the overtaking clutch test piece changes as its speed gradually accelerates in the overtaking direction.

[0079] Specifically, after transmitting the first resistance value of the clutch when the input shaft 200 is in the second state to the controller 400, a second relationship curve is generated based on the second speed and the first resistance value of the clutch when the input shaft 200 is in the second state, and the second relationship curve is output. The second relationship curve facilitates visual observation by test personnel, allowing for a more intuitive understanding of changes in the state of the overrunning clutch test piece as its speed gradually accelerates in the engagement direction during the clutch disengagement speed test in the takeoff state.

[0080] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A device for testing the disengagement speed of an overrunning clutch, characterized in that: include: test platform; An output shaft (100) for connecting to a clutch inner ring (310); An input shaft (200) is used to connect to the clutch outer ring (320), wherein the input shaft (200) has a first state in which the clutch outer ring (320) is driven to gradually accelerate in an overrunning direction, and a second state in which the clutch outer ring (320) is driven to gradually accelerate in an engaging direction; a first rotation speed sensor, disposed on the input shaft (200), and configured to detect a first rotation speed when the input shaft (200) is in a first state and a second rotation speed when the input shaft (200) is in a second state, and transmit the first rotation speed and the second rotation speed to a controller (400); A DC resistance tester (500) having a first end and a second end connected to a clutch inner ring (310) and a clutch outer ring (320) respectively, and used to measure a first resistance value. The DC resistance tester (500) transmits the first resistance value to the controller (400). The controller (400) compares the first resistance value with a standard resistance value, outputs an adjustment instruction when the first resistance value is greater than the standard resistance value, and controls the input shaft (200) to stop according to the adjustment instruction. The load motor (600) is arranged on the test platform and has a third state of being connected to the output shaft (100) and applying a working load, and a fourth state of being disconnected from the output shaft (100).

2. The overrunning clutch disengagement speed test device according to claim 1, characterized in that: The output shaft (100) is provided with a first conductive slip ring (110), the input shaft (200) is provided with a second conductive slip ring (120), a first end of the DC resistance tester (500) is connected to the first conductive slip ring (110), and a second end of the DC resistance tester (500) is connected to the second conductive slip ring (120).

3. The overrunning clutch disengagement speed test device according to claim 2, characterized in that: A DC power supply (700) is connected between the second end of the DC resistance tester (500) and the second conductive slip ring (120).

4. The overrunning clutch disengagement speed test device according to claim 3, characterized in that: A first insulating adapter sleeve coupling (610) is provided between the load motor (600) in the third state and the output shaft (100).

5. An overrunning clutch disengagement speed test device according to any one of claims 1 to 4, characterized in that: It also includes a driving motor (800) arranged on the test platform, and the output end of the driving motor (800) is connected to the input shaft (200).

6. The overrunning clutch disengagement speed test device according to claim 5, characterized in that: A second insulating adapter sleeve coupling (810) is provided between the drive motor (800) and the input shaft (200).

7. The overrunning clutch disengagement speed test device according to claim 1, characterized in that: The invention also includes a second speed sensor provided on the output shaft (100), the second speed sensor being used to detect the speed of the output shaft (100) to obtain a third speed, and transmit the third speed to the controller (400); the controller (400) compares the second speed with the third speed, and outputs the adjustment instruction when the difference between the second speed and the third speed is greater than a standard speed difference.

8. A disengagement speed test method, applied to the overrunning clutch disengagement speed test device according to any one of claims 1 to 7, characterized in that: The disengagement speed test method comprises the following steps: Switching the load motor (600) to a fourth state; Switching the input shaft (200) to a first state, driving the clutch outer ring (320) to gradually accelerate in an overtaking direction; detecting the rotation speed of the input shaft (200) by a first rotation speed sensor to obtain a first rotation speed, and transmitting the first rotation speed to a controller (400); Using a DC resistance tester (500) to measure a first resistance value of the clutch when the input shaft (200) is in a first state, and transmitting the first resistance value of the clutch when the input shaft (200) is in the first state to the controller (400); The controller (400) compares a first resistance value of the clutch when the input shaft (200) is in the first state with a standard resistance value, outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft (200) is in the first state, controls the input shaft (200) to stop according to the adjustment instruction, and uses the corresponding first speed as the disengagement speed of the overrunning clutch in the overrunning state; Switching the load motor (600) to a third state and applying a set working load to the output shaft (100); Switching the input shaft (200) to a second state, driving the clutch outer ring (320) to gradually accelerate in the engagement direction; detecting the rotation speed of the input shaft (200) by the first rotation speed sensor to obtain a second rotation speed, and transmitting the second rotation speed to the controller (400); Using the DC resistance tester (500) to measure a first resistance value of the clutch when the input shaft (200) is in the second state, and transmitting the first resistance value of the clutch when the input shaft (200) is in the second state to the controller (400); The controller (400) compares the first resistance value of the clutch when the input shaft (200) is in the second state with a standard resistance value, outputs an adjustment instruction when the first resistance value of the clutch is greater than the standard resistance value when the input shaft (200) is in the second state, controls the input shaft (200) to stop according to the adjustment instruction, and outputs the corresponding second speed as the disengagement speed of the overrunning clutch in the starting state.

9. The method for testing the disengagement speed according to claim 8, characterized in that: After transmitting the first resistance value of the clutch when the input shaft (200) is in the first state to the controller (400), the method further includes generating a first relationship curve according to the first speed and the first resistance value of the clutch when the input shaft (200) is in the first state, and outputting the first relationship curve.

10. A disengagement speed test method according to claim 8 or 9, characterized in that: After transmitting the first resistance value of the clutch when the input shaft (200) is in the second state to the controller (400), the method further includes generating a second relationship curve according to the second speed and the first resistance value of the clutch when the input shaft (200) is in the second state, and outputting the second relationship curve.

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