Equipment and method for testing limit torque and speed of clutch

Abstract

The invention discloses a clutch limit torque and speed testing device and method, and the device comprises a power system which is used for providing power for a tested clutch; the torque loading system is used for loading torque for the tested clutch; the measuring system is used for acquiring the torque and the rotating speed of the tested clutch in real time; the control processing system is used for calculating torque errors of the tested clutch at two adjacent moments, and when the torque errors of the tested clutch at the two adjacent moments are larger than a set torque error threshold value, it is judged that the clutch slips; and determining the torque and the rotating speed when the tested clutch slips, which are the limit torque and the limit rotating speed of the tested clutch. And automatic measurement of the limit torque and the rotating speed of the clutch is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of clutch performance testing, and particularly to a clutch ultimate torque and speed testing device and method. Background Technique

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] As a crucial component in the transmission system of agricultural machinery, the performance of the clutch directly affects the working efficiency and reliability of the equipment. To ensure that the quality of the clutch meets the requirements, it is necessary to test the performance of the clutch.

[0004] Existing devices for testing the performance of clutches can only measure and record the torque and speed of the clutch under various working conditions. Then, relevant personnel analyze the recorded torque and speed to determine the ultimate torque and speed, so as to judge whether the clutch performance meets the requirements.

[0005] Limited by the professional level of relevant personnel, the accuracy of the determined ultimate torque and rotational speed cannot be guaranteed, and the calculation efficiency is low, resulting in low efficiency and accuracy in clutch performance testing. Summary of the Invention

[0006] In order to solve the above problems, the present invention proposes a clutch ultimate torque and speed testing device and method, which can realize the automatic measurement of the clutch ultimate torque and speed.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect, a clutch ultimate torque and speed testing device is proposed, including:

[0009] A power system for providing power to the clutch under test;

[0010] A torque loading system for loading torque on the clutch under test;

[0011] A measurement system for real-time acquisition of the torque and rotational speed of the clutch under test;

[0012] A control and processing system for calculating the torque error of the clutch under test between two adjacent moments. When the torque error of the clutch under test between two adjacent moments is greater than the set torque error threshold, it is determined that the clutch slips; the torque and rotational speed when the clutch under test slips are determined as the ultimate torque and ultimate rotational speed of the clutch under test.

[0013] Furthermore, the power system, the torque loading system, and the clutch under test are all installed on the test bench.

[0014] Further, the power system includes a power output device and a speed reducer; the power output device is connected to the speed reducer, and the speed reducer is connected to the clutch under test.

[0015] Further, both the power system and the torque loading system are connected to the clutch under test through couplings.

[0016] Further, the control and processing system is further configured to control the torque loaded by the torque loading system on the clutch under test to be less than or equal to the set torque theoretical value.

[0017] Further, when the torque of the clutch under test at the first moment is greater than the torque of the clutch under test at the second moment, and the error between the two torques is greater than the set torque error threshold, the control and processing system determines that the clutch under test slips; the torque and speed of the clutch under test at the first moment are used as the limit torque and limit speed of the clutch under test; wherein, the first moment and the second moment are adjacent moments, and the first moment is earlier than the second moment.

[0018] Further, the torque loading system includes a magnetic powder brake, and the magnetic powder brake is used to connect to the output end of the clutch under test.

[0019] Further, the measurement system is further configured to obtain the output speed of the power output device.

[0020] The control and processing system is configured to determine the theoretical speed of the clutch under test according to the output speed of the power output device and the transmission ratio of the speed reducer; compare the theoretical speed of the clutch under test with the speed of the clutch under test obtained by the measurement system; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is less than the set speed error threshold, it is determined that the speed regulation of the speed reducer is normal; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is greater than or equal to the set speed error threshold, it is determined that the speed regulation of the speed reducer is abnormal.

[0021] Further, the control and processing system is further configured to evaluate the performance of the clutch under test according to the limit torque and limit speed of the clutch under test, and obtain the performance evaluation result of the clutch under test.

[0022] In a second aspect, a method for testing the limit torque and speed of a clutch is proposed, including:

[0023] Providing power to the clutch under test through a power system;

[0024] Loading torque on the clutch under test through a torque loading system;

[0025] Obtaining the torque and speed of the clutch under test through a measurement system;

[0026] Calculate the torque error of the clutch under test at two adjacent moments;

[0027] When the torque error of the clutch under test at two adjacent moments is greater than the set torque error threshold, it is determined that the clutch slips;

[0028] Determine the torque and rotational speed when the clutch under test slips, which are the limit torque and limit rotational speed of the clutch under test.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] A clutch limit torque and speed test device and method proposed by the present invention. The device provides power for the clutch under test through a power system; loads torque on the clutch under test through a torque loading system; obtains the torque and rotational speed of the clutch under test through a measurement system; the control processing system calculates the torque error of the clutch under test at two adjacent moments, determines whether the clutch under test slips according to the torque error, and takes the torque and rotational speed when the clutch under test slips as the limit torque and limit rotational speed of the clutch under test, realizing the automatic measurement of the clutch limit torque and rotational speed. Using this limit torque and rotational speed ensures the accurate and efficient evaluation of the clutch performance.

[0031] Advantages of additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The specification drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application.

[0033] Figure 1 The front view of a clutch limit torque and speed test device disclosed for an embodiment;

[0034] Figure 2 The top view of a clutch limit torque and speed test device disclosed for an embodiment;

[0035] Figure 3 The structural block diagram of a clutch limit torque and speed test device disclosed for an embodiment.

[0036] Wherein: 1. Power cabinet, 2. Electric control box, 3. Magnetic powder brake, 4. Clutch, 5. Motor, 6. Reducer, 7. Torque sensor, 8. Test bench. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention will be further described below in conjunction with the drawings and embodiments.

[0038] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application pertains.

[0039] It should be noted that the terms used herein are merely for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] In the present invention, terms such as "fixed connection", "connected", "connected to" should be understood in a broad sense, which may mean a fixed connection, an integral connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in the field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances, and it should not be construed as a limitation to the present invention.

[0041] In the case of no conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0042] Embodiment 1

[0043] As a crucial component in the transmission system of agricultural machinery, the performance of the clutch directly affects the working efficiency and reliability of the equipment.

[0044] From the perspective of product quality control, in the agricultural machinery manufacturing industry, ensuring the consistency of product quality in different batches is the foundation for an enterprise to gain a foothold in the market. As an indispensable component in many agricultural machinery, the stability of the clutch quality is of crucial importance. Only by accurately testing the ultimate torque and speed of the clutch can the product quality be effectively controlled and the whole machine failure caused by clutch quality problems be avoided.

[0045] In terms of industry standard specifications, a series of strict standards and specifications have been formulated for the performance of agricultural machinery clutches. The implementation of these standards cannot be separated from the strong support of professional testing equipment.

[0046] However, the existing devices for testing the performance of clutches can only measure and record the torque and speed of the clutch under various working conditions. Then, relevant personnel analyze the recorded torque and speed to determine the ultimate torque and speed, so as to judge whether the clutch performance meets the requirements. Limited by the professional level of relevant personnel, the accuracy of the determined ultimate torque and rotational speed cannot be guaranteed, and the calculation efficiency is low, resulting in low efficiency and accuracy of clutch performance testing.

[0047] Since there is a lack of equipment for automatically testing the ultimate torque and speed of agricultural machinery clutches in the current market. This situation makes it difficult to ensure the consistency of clutch product quality and also hinders the research, development and improvement of clutch technology. Therefore, it is necessary to develop a device for accurately testing the ultimate torque and speed of agricultural machinery clutches.

[0048] A clutch ultimate torque and speed testing device proposed in this embodiment can provide power for the clutch to be tested through a power system; load torque on the clutch to be tested through a torque loading system; obtain the torque and rotational speed of the clutch to be tested through a measurement system; and analyze various data obtained by the measurement system through a control and processing system, so as to determine the ultimate torque and ultimate rotational speed, realizing the automatic measurement of the clutch ultimate torque and ultimate rotational speed. Using the ultimate torque and ultimate rotational speed, it ensures the accurate and efficient evaluation of the clutch performance.

[0049] Specifically, a clutch ultimate torque and speed testing device proposed in this embodiment, as Figures 1 - 3 shown, includes:

[0050] A power system for providing power for the clutch to be tested;

[0051] A torque loading system for loading torque on the clutch to be tested;

[0052] A measurement system for real-time obtaining the torque and rotational speed of the clutch to be tested;

[0053] A control and processing system for calculating the torque error of the clutch to be tested between two adjacent moments. When the torque error of the clutch to be tested between two adjacent moments is greater than the set torque error threshold, it is determined that the clutch slips; determining the torque and rotational speed when the clutch to be tested slips, which are the ultimate torque and ultimate rotational speed of the clutch to be tested.

[0054] Among them, the power system includes a power output device and a reduction gearbox 6; the power output device is connected to the reduction gearbox, and the reduction gearbox is connected to the clutch 4 to be tested.

[0055] The power output device can be an engine or an electric motor 5; the electric motor 5 is a variable-frequency electric motor. As a power source, the power of the variable-frequency electric motor is reasonably selected according to the torque range of common agricultural machinery clutches. The function of the variable-frequency electric motor is to provide sufficient power for the entire system during the clutch performance test to ensure the smooth progress of the test. The frequency converter is responsible for adjusting the speed of the electric motor, and through it, the speeds of agricultural machinery under different working conditions can be flexibly simulated, and the working conditions of low-speed start, medium-speed operation, or high-speed rotation can be accurately achieved.

[0056] The torque loading system includes a magnetic particle brake 3, and the magnetic particle brake 3 is used to connect to the output end of the clutch to be tested. By adjusting the excitation current, the braking torque of the magnetic particle brake can be accurately controlled. It has a fast response speed and high precision, and can quickly and accurately load different magnitudes of torque on the clutch to be tested. The function of the torque loading system is to simulate the different load conditions that the clutch bears in actual work of agricultural machinery, so as to accurately test the performance of the clutch under various loads.

[0057] Such as Figure 1 , Figure 2 As shown, the power system, torque loading system, and the clutch to be tested in this embodiment are all installed on the test bench 8.

[0058] The reduction gearbox 6 and the torque loading system are both connected to the clutch to be tested 4 through couplings.

[0059] The test bench 8 is made of high-strength metal materials, and components such as bearing seats, couplings, and reduction gearboxes are installed on it. The test bench itself has excellent stiffness and stability and can withstand various forces and vibrations generated during the test. The bearing seats and couplings tightly connect the power system, torque loading system, and the clutch to be tested to ensure the smooth transmission of power and torque, providing a solid physical support foundation for the normal development of the entire test.

[0060] The measurement system includes a torque sensor 7. The torque sensor has extremely high sensitivity and can accurately capture extremely small changes in the torque transmitted by the clutch. Its function is to obtain the torque and speed of the clutch to be tested in real time and accurately during the test, providing the original basis for subsequent data processing and analysis.

[0061] The measurement system is also used to obtain the output speed of the power output device.

[0062] A control processing system is used to determine the theoretical speed of the clutch under test according to the output speed of the power output device and the transmission ratio of the speed reducer; compare the theoretical speed of the clutch under test with the speed of the clutch under test obtained by the measurement system; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is less than the set speed error threshold, it is determined that the speed regulation of the speed reducer is normal; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is greater than or equal to the set speed error threshold, it is determined that the speed regulation of the speed reducer is abnormal.

[0063] The control processing system is also used to control the power system and the torque loading system to stop working when it is determined that the speed regulation of the speed reducer is abnormal, so as to repair the speed reducer. When the speed regulation of the speed reducer is normal, the power system and the torque loading system are restarted to ensure the accuracy of the performance test of the clutch under test.

[0064] The control processing system is also used to control the torque loaded by the torque loading system on the clutch under test to be less than or equal to the set torque theoretical value to protect the test equipment from being damaged. The torque theoretical value is the value set for the protected shaft end of the clutch under test; when the torque loaded by the torque loading system on the clutch under test increases to be greater than the torque theoretical value, if the clutch under test is not opened, the shaft connected to the clutch will be directly twisted off.

[0065] The control processing system is used to determine that the clutch under test slips when the torque of the clutch under test at the first moment is greater than the torque of the clutch under test at the second moment, and the two torque errors are greater than the set torque error threshold; use the torque and speed of the clutch under test at the first moment as the ultimate torque and ultimate speed of the clutch under test; where the first moment and the second moment are adjacent moments, and the first moment is earlier than the second moment.

[0066] The control processing system is also used to evaluate the performance of the clutch under test according to the ultimate torque and ultimate speed of the clutch under test, and obtain the performance evaluation result of the clutch under test. Specifically: when the ultimate torque of the clutch under test is greater than the set torque threshold, or / and, the ultimate speed is greater than the set speed threshold, it is determined that the performance of the clutch under test is unqualified; when the ultimate torque of the clutch under test is less than or equal to the torque threshold and the ultimate speed is less than or equal to the set speed threshold, it is determined that the performance of the clutch under test is qualified.

[0067] The control processing system includes a PLC and a display; the PLC is used to convert the analog signals sent by the measurement system into digital signals, analyze the data signals, determine the ultimate torque and ultimate speed of the clutch under test and the performance evaluation result of the clutch under test; and generate a test report by using the real-time torque, real-time speed, ultimate torque and ultimate speed of the clutch under test, the performance evaluation result of the clutch under test, the output speed of the power output device and the output torque of the torque loading system. The display shows the test report, and finally provides an intuitive and accurate test result for the user to help the user comprehensively understand the performance of the clutch.

[0068] In this embodiment, a power cabinet 1 and an electric control box 2 are also provided; the power cabinet 1 provides power for the power system and the torque loading system, and the electric control box 2 controls the measurement system and the control processing system.

[0069] When testing the clutch under test with a clutch ultimate torque and speed testing device disclosed in this embodiment; first, place the test bench steadily and adjust it to be horizontal. Then, fix the power output device at the designated position on the test bench, and then install the reduction gearbox to ensure that it is concentric with the axis of the power output device and fixed. After that, install the torque sensor. The input end of the torque sensor is connected to the output end of the magnetic powder brake through a coupling; the output end of the torque sensor is connected to the output end of the clutch under test, and operate strictly according to the requirements. Then install the clutch at the appropriate position and adjust the parameters according to the instruction manual. Subsequently, install the magnetic powder brake, reserve space for heat dissipation and maintenance and fix it, and connect the power line and the control line. After that, place the power cabinet, wire and connect according to the specifications, install the electric control box at a place convenient for operation and observation and connect the wires correctly. After the installation is completed, conduct a comprehensive commissioning of the equipment. Check whether the electrical system is normal and whether the installation position of the sensor is accurate. Calibrate the torque sensor by using a standard torque calibration device and a speed calibration device to ensure accurate measurement data. Conduct an unloaded trial run to check whether the equipment runs smoothly, whether there are abnormal vibrations and noises; then conduct a loaded trial run, gradually increase the torque and speed, observe the working condition of the equipment, and debug and optimize the test software.

[0070] Test operation steps: Start the power output device, adjust the power output device to an appropriate speed through the frequency converter, and transmit the power to the clutch under test through the coupling. Gradually increase the torque of the torque loading system, and at the same time, the measurement system collects the torque and speed data of the clutch under test in real time. When the torque of the clutch under test drops suddenly and the torque error between two adjacent moments of the clutch under test is greater than the set torque error threshold, it is determined that the clutch slips; the torque and speed when the clutch under test slips are the limit torque and limit speed of the clutch under test. The control processing system analyzes and processes the data collected by the measurement system: controls the output speed of the power output device through the PLC program, and determines the theoretical speed of the clutch under test according to the transmission ratio of the speed reducer; the measurement system collects data through 485 communication and analog input and records it at set time intervals; the magnetic powder brake synchronously transmits the real-time torque data to the PLC at time intervals, and the PLC automatically matches and associates it with the clutch speed data at the corresponding moment; the torque sensor measures the torque at established time intervals, and the PLC analyzes and processes it to find two torques whose torque error between two adjacent moments of the clutch under test is greater than the set torque error threshold, extracts the clutch torque and speed in the corresponding time period, and uniformly organizes and records them in the report form to provide support for subsequent analysis and judgment, and at the same time stops the operation of the entire system.

[0071] A clutch limit torque and speed test device disclosed in this embodiment realizes the automatic measurement of the limit torque and speed of the clutch of type II.

[0072] Embodiment 2

[0073] In this embodiment, a clutch limit torque and speed test method is disclosed, including:

[0074] Provide power for the clutch under test through the power system;

[0075] Load torque for the clutch under test through the torque loading system;

[0076] Obtain the torque and speed of the clutch under test through the measurement system;

[0077] Calculate the torque error between two adjacent moments of the clutch under test;

[0078] When the torque error between two adjacent moments of the clutch under test is greater than the set torque error threshold, it is determined that the clutch slips;

[0079] Determine the torque and speed when the clutch under test slips, which are the limit torque and limit speed of the clutch under test.

[0080] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with this embodiment can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of this application.

[0081] Although the specific implementation manners of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the protection scope of the present invention. Those skilled in the art should understand that based on the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. A clutch limit torque and speed testing device, characterized in that: include: A power system, used to provide power to the clutch under test; A torque loading system, used to load torque to the clutch under test; A measuring system for obtaining the torque and speed of the clutch under test in real time; The control processing system is used to calculate the torque error of the measured clutch at two adjacent moments. When the torque error of the measured clutch at two adjacent moments is greater than a set torque error threshold, it is determined that the clutch is slipping; the torque and speed when the measured clutch is slipping are determined as the limit torque and limit speed of the measured clutch.

2. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The power system, torque loading system and clutch under test are all installed on the test bench.

3. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The power system includes a power output device and a reduction box; the power output device is connected to the reduction box, and the reduction box is connected to the clutch to be tested.

4. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: Both the power system and the torque loading system are connected to the clutch under test through a coupling.

5. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The control processing system is also used to control the torque loading system to load the torque on the tested clutch, which is less than the set torque theoretical value.

6. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: A control processing system is used to determine that the clutch being tested is slipping when the torque of the clutch being tested at a first moment is greater than the torque of the clutch being tested at a second moment, and the errors of the two torques are greater than a set torque error threshold; the torque and speed of the clutch being tested at the first moment are used as the limit torque and limit speed of the clutch being tested; wherein the first moment and the second moment are adjacent moments, and the first moment is earlier than the second moment.

7. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The torque loading system includes a magnetic powder brake, which is used to be connected to the output end of the clutch to be tested.

8. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The measuring system is also used to obtain the output speed of the power output device; The control processing system is used to determine the theoretical speed of the clutch under test according to the output speed of the power output device and the transmission ratio of the reduction gearbox; compare the theoretical speed of the clutch under test with the speed of the clutch under test obtained by the measurement system; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is less than a set speed error threshold, determine that the speed regulation of the reduction gearbox is normal; when the error between the theoretical speed of the clutch under test and the speed of the clutch under test obtained by the measurement system is greater than or equal to the set speed error threshold, determine that the speed regulation of the reduction gearbox is abnormal.

9. A clutch limit torque and speed testing device as claimed in claim 1, characterized in that: The control processing system is also used to evaluate the performance of the clutch under test according to the limit torque and limit speed of the clutch under test, and obtain the performance evaluation result of the clutch under test.

10. A clutch limit torque and speed testing method, characterized in that: include: Provide power to the clutch under test through the power system; Loading torque to the clutch under test through a torque loading system; The torque and speed of the clutch under test are obtained through the measuring system; Calculate the torque error of the clutch under test at two adjacent moments; When the torque error of the clutch under test at two adjacent moments is greater than the set torque error threshold, it is determined that the clutch is slipping; The torque and speed when the clutch under test slips are determined as the limit torque and limit speed of the clutch under test.

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