Dynamic-static torque mutual test type brake performance detection device

Abstract

The invention discloses a dynamic-static torque mutual test type brake performance detection device. Dynamic torque measurement and static torque measurement are innovatively combined for mutual test. The motor is connected to a dynamic torque sensor fixed to the supporting base through an electromagnetic clutch, the dynamic torque sensor drives a brake rotor through a coupler, a rotating shaft and a flat key, and a static torque sensor is installed on the flange side of the brake. During detection, the motor drives the rotor to idle, and the dynamic torque sensor measures inherent torque as a calibration reference; then the electromagnetic clutch is powered off to disengage the motor, stepped increasing pressure is applied to the brake through the hydraulic device, and torque data of the dynamic torque sensor and the static torque sensor are synchronously recorded; and the linearity, repeatability and deviation value of the two sets of data are compared and analyzed through an external processing unit, and if the deviation is smaller than a preset threshold value, it is judged that the braking torque meets the requirement. According to the method, through mutual verification of dynamic and static torques, the accuracy and reliability of measurement are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of mechanical testing and sensor technology, and particularly relates to an integrated detection device for testing the braking performance of a friction brake. BACKGROUND

[0002] Traditional friction brake torque testing relies on separate special-purpose equipment, and the current mainstream testing methods are mainly divided into dynamic and static types. The application of a single sensor has inherent defects. Dynamic sensors are susceptible to temperature drift and electromagnetic interference, and their long-term stability is poor. Static sensors cannot directly verify the consistency of data under dynamic conditions, resulting in a lack of cross-validation of test results and a significant risk of cumulative errors. In addition, in the test bench aspect, the patent "A device for measuring brake torque" connects the test motor and the brake to be tested to the two ends of the torque sensor through a coupling, provides torque for the brake through the test motor, obtains the brake torque of the brake according to the torque sensor, and can provide stable torque through the uniform rotation of the test motor. However, this method uses a single type of torque sensor, and the measurement lacks continuity and accuracy, and the operation error is large. In view of the above problems, the present detection device proposes an integrated design, combines a flange type static torque sensor and a dynamic torque sensor, performs multi-parameter synchronous acquisition function, realizes synchronous testing of dynamic and static conditions, can be tested repeatedly, solves the bottleneck of single function of the equipment, distortion of working condition simulation and the like, and provides an efficient and accurate integrated verification platform for the braking performance research of the brake device. SUMMARY

[0003] The purpose of this invention is to design a dynamic-static torque cross-validation braking performance testing device. This device breaks through the traditional method of torque measurement by creatively combining the measured values ​​of a dynamic torque sensor and a static flange torque sensor. The motor output is connected to one end of the dynamic torque sensor via an electromagnetic clutch. The dynamic torque sensor is fixedly mounted on a support base, and its other end is connected to a rotating shaft via a coupling. The rotating shaft is connected to the rotor of the brake via a common flat key. A static torque sensor is installed on the flange of the other side of the brake for measuring static torque. The entire testing device is fixed by two support bases and a cast iron platform, forming an integral rigid structure. The data outputs of the dynamic and static torque sensors are connected to an external processing unit to achieve synchronous cross-validation analysis of dynamic and static torque. Under no-load conditions, the brake rotor is driven by an electric motor to rotate freely, generating a stable torque. The inherent torque of the dynamic torque sensor is used as a calibration reference value. Afterward, the electromagnetic clutch is de-energized, disconnecting the electric motor from the dynamic torque sensor. A hydraulic system applies progressively increasing pressure to the brake, while simultaneously recording the measurement data from both the flange-type static torque sensor and the dynamic torque sensor. The linearity, repeatability, and deviation of the two sets of data are compared and analyzed. If the deviation is less than a preset threshold, the measured braking torque is considered to meet the requirements. This cross-validation of data significantly improves the accuracy and reliability of the measurement data compared to traditional measurement methods.

[0004] The objective of this invention is achieved as follows:

[0005] This invention proposes a dynamic-static torque cross-verification braking performance testing device, characterized by: the output end of a motor connected to one end of a dynamic torque sensor via an electromagnetic clutch; the dynamic torque sensor is fixedly mounted on a support base, and its other end connected to a rotating shaft via a coupling; the rotating shaft is connected to the rotor of the brake via a common key; a static torque sensor is installed on the flange of the other side of the brake for measuring static torque; the entire testing device is fixed by two support bases and a cast iron platform, forming an integral rigid structure; the data output ends of the dynamic and static torque sensors are connected to an external processing unit to achieve synchronous cross-verification analysis of dynamic and static torque. Under no-load conditions, the motor drives the rotating shaft to rotate freely, generating a stable torque. The inherent torque of the device is measured using the dynamic torque sensor as a calibration reference value. Afterwards, the electromagnetic clutch is de-energized, the motor and dynamic torque sensor are disconnected, and a hydraulic device applies a stepped increasing pressure to the brake, simultaneously recording the measurement data from the flange-type static torque sensor and the dynamic torque sensor. The linearity, repeatability, and deviation values ​​of the two sets of data are compared and analyzed. If the deviation is less than a preset threshold, the measured braking torque is determined to meet the requirements.

[0006] The present invention may also include the following features:

[0007] The coupling is an elastic coupling for transmitting the torque of the motor and compensating the axial deviation.

[0008] The torque is transmitted between the rotating shaft and the brake rotor through a common key and a coupling, and between the motor and the dynamic torque sensor through a common key and an electromagnetic clutch.

[0009] The dynamic torque sensor is a rotary torque sensor, and the static torque sensor is a flange strain gauge torque sensor, which can measure dynamic and static torque simultaneously and cover the full working condition from transient to steady state.

[0010] The brake is a disc friction brake, and the brake torque range matches the range of the dynamic torque sensor and the static torque sensor.

[0011] The electromagnetic clutch transmits the output torque of the motor to the dynamic torque sensor and the brake rotor in the energized state, and cuts off the power connection between the motor and the dynamic torque sensor and the brake rotor in the de-energized state, to isolate the motor interference in the static torque test process.

[0012] The motor, dynamic torque sensor, rotating shaft, hydraulic brake and flange static torque sensor are connected in sequence to form a compact transmission chain.

[0013] The test bench can not only measure the brake torque of the brake, but also simulate various braking conditions through the hydraulic brake and measure the torque change during braking.

[0014] The advantages of the present application are:

[0015] The present application is

[0016] The reasonable design and layout make the overall structure compact. This compact structure layout not only saves space, facilitates installation and use in limited space such as laboratory or production workshop, but also reduces energy loss in the process of torque transmission, improves the efficiency and measurement accuracy of the detection device.

[0017] The present application can realize high-precision measurement, and the combination of dynamic torque sensor and flange static torque sensor can measure dynamic and static torque simultaneously and cover the full working condition from transient to steady state. This high-precision measurement capability provides reliable data support for studying the performance of the brake.

[0018] The cooperative work of the two sensors ensures that high-precision measurement results can be obtained under different working conditions, with a very small error range, meeting the high-precision test requirements.

[0019] The detection device can not only measure the motor output torque, but also simulate various braking conditions through the hydraulic brake, while measuring the torque change during braking. This multifunctional design makes it suitable for various application scenarios, such as motor performance testing, brake performance evaluation, transmission research, etc. It can simulate various operating states from low speed to high speed, from light load to heavy load, to meet the testing needs of different equipment.

[0020] The present application can also achieve diversity of tests by changing different structures:

[0021] Between the motor and the torque sensor, and between the torque sensor and the brake, a switchable connection method can be designed. For example, using a flexible coupling can absorb vibration and axial deviation, suitable for high-vibration or poor-centering test scenarios; while rigid connection can improve torque transmission efficiency, suitable for high-precision testing. Flexible connections can be replaced with components of different stiffness or materials as needed to adapt to different testing needs.

[0022] Additional loading modules, such as mechanical loading devices (flywheels, springs, etc.) or electromagnetic loading devices, can be added to the detection device to simulate different load characteristics and further enrich the test conditions. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The overall structure of the detection device of the present application is shown in the figure.

[0024] Figure 2 The exploded view of the detection device of the present application is shown in the figure. DETAILED DESCRIPTION

[0025] The present application will be described in more detail below with examples combined with the drawings:

[0026] Combined Figure 1 , Figure 1 The structure diagram of the main part of the test device is shown in the figure, mainly including motor (1), flange type static torque sensor (10), dynamic torque sensor (4), hydraulic brake (6), electromagnetic clutch (2), cast iron platform (15), dynamic torque sensor support seat (12), flat key (3), static torque sensor support seat (7), rotating shaft (11) and other structures.

[0027] Combined Figure 2As a whole explosion diagram of the device, the diagram shows the connection and cooperation of various components, supported by the cast iron platform (15) and the dynamic sensor support seat (12), fixed on the static torque sensor support seat (7) through bolts (9), the motor (1) is connected with the dynamic torque sensor (4) at the right end, the torque is transmitted through the electromagnetic clutch (2) and the flat key (3), the dynamic torque sensor (4) is connected with the rotating shaft (11) at the right end, the torque is transmitted through the electromagnetic clutch (2) and the flat key in the middle, the connection of the rotating shaft ensures no relative sliding, the rotating shaft (11) is connected with the hydraulic brake (6) through the flat key, the hydraulic brake (6) is connected with the flange type static torque sensor (10) through the flange connection at the right end, and is fixed through the bolts (9) and the static torque sensor support seat (7).

[0028] The specific embodiment of the present application is that in the no-load state, the motor drives the brake rotor to idle, generates stable torque, measures the inherent torque of the device by the dynamic torque sensor as the calibration reference value, the electromagnetic clutch is powered off, the motor is disconnected with the dynamic torque sensor, the hydraulic device applies stepwise increasing pressure to the brake, the measurement data of the flange type static torque sensor and the dynamic torque sensor are recorded synchronously, the linearity, repeatability and deviation value of the two groups of data are compared and analyzed, and if the deviation is less than the preset threshold value, it is determined that the measured brake torque meets the requirements.

[0029] The technical idea of the present application is:

[0030] The technical idea of the present application is derived from the demand for in-depth research on the torque transmission characteristics of the friction brake in practical application. In order to accurately measure and evaluate the performance of the brake, while reducing the complexity of the test and ensuring the accuracy of the test process, the present application proposes an innovative dynamic-static torque mutual verification type brake performance detection device for friction brake. Through the combined use of the dynamic torque sensor (4) and the flange type static torque sensor (10), the indication on the sensor is displayed, and the torque transmission and braking effect of the brake under different working conditions are comprehensively evaluated. The dynamic torque sensor measurement value and the static flange torque sensor measurement value are combined and verified with each other, compared with the traditional measurement method, the present detection device greatly improves the accuracy and reliability of the measurement data.

Claims

1. A dynamic-static torque mutual verification braking performance testing device, characterized in that: The motor output end is connected with one end of a dynamic torque sensor through an electromagnetic clutch, the dynamic torque sensor is fixedly installed on a support seat, the other end of the dynamic torque sensor is connected with a rotating shaft through a shaft coupling, the rotating shaft is connected with a rotor of a brake through a common key, a static torque sensor is installed on the other side flange of the brake for measuring static torque; the whole detection device is fixed by two support seats and a cast iron platform to form an integral rigid structure, data output ends of the dynamic torque sensor and the static torque sensor are connected to an external processing unit to realize synchronous mutual analysis of dynamic and static torque; in a no-load state, the brake rotor is driven to idle by the motor to generate stable torque, the inherent torque of the dynamic torque sensor measuring device is measured as a calibration reference value, then the electromagnetic clutch is powered off, the motor is disconnected with the dynamic torque sensor, a stepwise increasing pressure is applied to the brake through a hydraulic device, the measurement data of the flange static torque sensor and the dynamic torque sensor are recorded synchronously, the linearity, repeatability and deviation value of the two groups of data are compared and analyzed, if the deviation is less than a preset threshold value, it is determined that the measured brake torque meets the requirements.

2. The dynamic-static torque interaction type brake performance detection device according to claim 1, characterized in that: The shaft coupling is an elastic shaft coupling for transmitting the torque of the motor and compensating axial deviation.

3. The dynamic-static torque interaction type brake performance detection device according to claim 1, characterized in that: The torque is transmitted between the rotating shaft and the brake rotor through a common key and a shaft coupling, and the torque is transmitted between the motor and the dynamic torque sensor through a common key and an electromagnetic clutch.

4. The dynamic-static torque interaction type brake performance detection device according to claim 1, characterized in that: The dynamic torque sensor is a rotary torque sensor, and the static torque sensor is a flange strain gauge torque sensor.

5. The dynamic-static torque interaction type brake performance detection device according to claim 1, characterized in that: The brake is a disc friction brake, and the brake torque range is matched with the range of the dynamic torque sensor and the static torque sensor.

6. The dynamic-static torque interaction type brake performance detection device according to claim 1, characterized in that: The electromagnetic clutch transmits the output torque of the motor to the dynamic torque sensor and the brake rotor in the power-on state, and cuts off the power connection between the motor and the dynamic torque sensor and the brake rotor in the power-off state to isolate the motor interference in the static torque test process.

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