CN111855119A - A kind of vibration detection method of transmission assembly - Google Patents

Abstract

The invention relates to the technical field of automobiles, and in particular to a method for detecting vibration of a transmission assembly, which comprises the steps of: drivingly connecting an input end of the transmission assembly with a driving device arranged on the test bench, The output end is connected with the load device arranged on the test bench; a sensor is arranged on the transmission assembly; the sensor is connected with the fault diagnosis system; the drive device and the load device are started, and the set The process performs operation tests on the transmission assembly under various working conditions; the fault diagnosis system obtains a speed vibration trend relationship curve according to the vibration signal and the speed of the input end of the transmission assembly; the fault diagnosis system analyzes the Order calculation and order analysis are performed on the rotational speed vibration trend relationship curve and the vibration data to identify the vibration source. The invention can detect the vibration and noise of the transmission assembly, so as to determine and solve the vibration and noise problem.

Description

A kind of vibration detection method of transmission assembly

technical field

The invention relates to the technical field of automobiles, in particular to a vibration detection method of a transmission assembly.

Background technique

With the development of the automobile industry, more and more cars have entered the actual production and life, providing great convenience for people's lives. In a car, the reducer assembly is a very important driving component, and the quality of the reducer assembly will determine the performance of the vehicle.

At present, the control of vibration and noise in the production and assembly process of automobile transmission mainly depends on structural design and process adjustment. In the assembly process of transmission assembly, there is almost no process detection of vibration and noise. Abnormal vibrations often appear on user vehicles with different conditions of use, causing trouble to users, and service personnel can't judge or solve them.

Therefore, there is a need for a vibration detection method for a transmission assembly to solve the above technical problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vibration detection method for a transmission assembly, which can quickly detect the vibration and noise of the transmission assembly, so as to determine and solve the vibration and noise problem.

For this purpose, the present invention adopts the following technical solutions:

A method for detecting vibration of a transmission assembly, comprising the following steps:

S1. Install the transmission assembly on the test bench, drive the input end of the transmission assembly to the drive device arranged on the test bench, and connect the output end of the transmission assembly to the drive device arranged on the test bench. The transmission connection of the load device on the frame;

A sensor is provided on the transmission assembly for collecting vibration signals during the rotational movement of the transmission assembly;

the sensor is connected with the fault diagnosis system;

S2. Start the drive device and the load device, and perform an operation test on the transmission assembly under various operating conditions according to a set process;

S3, the fault diagnosis system obtains a rotational speed vibration trend relation curve according to the vibration signal and the rotational speed of the input end of the transmission assembly, and records the vibration data;

S4. The fault diagnosis system performs order calculation and order analysis on the rotational speed vibration trend relationship curve and the vibration data to identify the vibration source.

Optionally, in the step S3, a vibration analyzer is used to collect and record vibration data.

Optionally, in the step S4, the methods used for order calculation and order analysis include global trend analysis, order spectrum analysis, waterfall diagram analysis and heat map analysis.

Optionally, the driving device includes a first electric dynamometer and a reduction gear box, the first electric dynamometer and the input end of the reduction gear box are connected through a first coupling, and the reduction gear box is connected. The output end of the transmission is connected to the transmission assembly.

Optionally, the first coupling is an elastic diaphragm coupling.

Optionally, the load device includes a speed-up gearbox and a second electric dynamometer, the input end of the speed-up gearbox is drivingly connected with the output end of the transmission assembly, and the output of the speed-up gearbox The end is connected with the second electric dynamometer through a second coupling.

Optionally, the second coupling is an elastic diaphragm coupling.

Optionally, the second power dynamometer is electrically connected to the power grid through a voltage stabilizing device.

Optionally, the test bench is connected to a prefabricated concrete foundation, the concrete foundation is installed in a concrete pit, and a shock absorbing device is arranged between the concrete foundation and the concrete pit.

Optionally, the sensor is a vibration acceleration sensor.

Beneficial effects of the present invention:

The invention provides a vibration detection method for a transmission assembly. The transmission assembly is arranged on a test bench, the input end of the transmission assembly is connected to the driving device, and the output end of the transmission assembly is connected to the complex load device. A sensor is arranged on the transmission assembly, and the sensor is connected with the fault diagnosis system for collecting vibration signals during the rotational movement of the transmission assembly. Start the drive device and the load device, and perform the operation test of the transmission assembly under various working conditions according to the set process. The fault diagnosis system performs order calculation and order analysis on the speed vibration trend relationship curve and vibration data to identify the vibration source. Through the above method, the vibration generation position can be accurately identified, so as to quickly determine the cause of the vibration generation and solve the vibration technical problem.

Description of drawings

FIG. 1 is a schematic diagram of vibration detection of a transmission assembly according to the present invention.

In the picture:

1-The first electric dynamometer; 2-The first coupling; 3-Reduction gearbox; 4-Special tooling fixture; 5-Transmission assembly; 6-Sensor; 7-Transmission shaft; ; 9- the second coupling; 10- the second electric dynamometer; 11- fault diagnosis system.

Detailed ways

The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In order to facilitate the rapid detection of the vibration and noise of the transmission assembly, so as to determine and solve the vibration and noise problem, as shown in FIG. 1 , the present invention provides a vibration detection method of the transmission assembly, including the following steps:

S1. Install the transmission assembly 5 on the test bench, connect the input end of the transmission assembly 5 with the drive device arranged on the test bench, and the output end of the transmission assembly 5 is connected to the drive device arranged on the test bench. Load device drive connection;

A sensor 6 is provided on the transmission assembly 5 for collecting vibration signals during the rotational movement of the transmission assembly 5;

The sensor 6 is connected to the fault diagnosis system 11;

S2, start the drive device and the load device, and perform the operation test on the transmission assembly 5 under various working conditions according to the set process;

S3, the fault diagnosis system 11 obtains the rotational speed vibration trend relation curve according to the vibration signal and the rotational speed of the input end of the transmission assembly 5, and records the vibration data;

S4. The fault diagnosis system 11 performs order calculation and order analysis on the rotational speed vibration trend relation curve and the vibration data to identify the vibration source. Use order calculation software to calculate the rotational vibration order of different parts in the assembly, and identify the vibration energy change in the vibration source. The part corresponding to the order of the energy change too fast is the fault source. , In this embodiment, the fault diagnosis system 11 uses the DA Evaluation software to perform real-time or post-trial data analysis and processing.

The transmission assembly 5 is set on the test bench, the input end of the transmission assembly 5 is connected to the driving device, the output end of the transmission assembly 5 is connected to the complex load device, the transmission assembly 5 is provided with a sensor 6, the sensor 6 is connected to the fault diagnosis system 11 for collecting vibration signals during the rotational movement of the transmission assembly 5 . Start the drive device and the load device, and perform the operation test on the transmission assembly 5 under various working conditions according to the set process. The fault diagnosis system 11 performs order calculation and order analysis on the speed vibration trend relationship curve and vibration data to identify the vibration source. . Through the above method, the vibration generation position can be accurately identified, so as to quickly determine the cause of the vibration generation and solve the vibration technical problem.

Further, in step S3, use a vibration analyzer to collect and record vibration data. The vibration analyzer can accurately collect and record the vibration data to provide strong data support for the subsequent fault diagnosis system 11, so that the location and components where the vibration is generated can be quickly determined. Of course, in other embodiments, the fault diagnosis system 11 can also be used directly to collect and record vibration data, which is not limited here.

Further, in step S4, the methods used in order calculation and order analysis include global trend analysis, order spectrum analysis, waterfall diagram analysis and heat map analysis. The vibration waterfall diagram obtained by the global trend analysis is used to observe the vibration change level of various working conditions and to initially identify the order and working conditions where the main vibration energy peaks are located; the vibration order spectrum obtained by the order spectrum analysis is used to identify The main parts or friction pairs generated by vibration energy; the order heat map obtained by heat map analysis is used to further confirm the location and working conditions of vibration energy generation. Through the above analysis method, the vibration source can be quickly determined.

Further, the driving device includes a first electric dynamometer 1 and a reduction gear box 3 . The input end of the first electric dynamometer 1 and the reduction gear box 3 are connected through a first coupling 2 , and the output end of the reduction gear box 3 is connected. Drive connection with transmission assembly 5. Specifically, the first coupling 2 adopts an elastic diaphragm coupling with a certain degree of deflection, which can compensate for the deviation of the centering between the first electric dynamometer 1 and the input end of the reduction gear box 3 . The output end of the reduction gear box 3 and the transmission assembly 5 are connected by a special fixture 4 to ensure that the first electric dynamometer 1 can drive the transmission assembly 5 to rotate. In other embodiments, the first coupling 2 may also adopt other rigid or flexible couplings, which are not limited herein.

Further, the load device includes a speed-up gearbox 8 and a second electric dynamometer 10. The input end of the speed-up gearbox 8 is connected with the output end of the transmission assembly 5 through a transmission shaft 7, and the output of the speed-up gearbox 8 is connected. The end is connected with the second electric dynamometer 10 through the second coupling 9 . Specifically, the second coupling 9 is an elastic diaphragm coupling. The misalignment between the second electric dynamometer 10 and the output of the step-up gearbox 8 can be compensated for. The transmission assembly 5 is driven to rotate by the first electric dynamometer 1 , and the load is applied by the second electric dynamometer 10 in the load device, so that the transmission assembly 5 can be simulated under various working conditions. In other embodiments, the second coupling 9 may also adopt other rigid or flexible couplings, which are not limited herein.

Further, the second power dynamometer 10 is electrically connected to the power grid through a voltage stabilizer. The electric energy generated by the rotation of the second electric dynamometer 10 driven by the transmission assembly 5 can be recovered, thereby improving the utilization rate of energy.

Further, the test bench is connected to a prefabricated concrete foundation, the concrete foundation is installed in a concrete pit, and a shock absorbing device is arranged between the concrete foundation and the concrete pit. The above arrangement can isolate the transmission of vibration, thereby ensuring the accuracy of the collected vibration signal.

Optionally, the sensor 6 is a vibration acceleration sensor. The vibration generated by the transmission assembly 5 in various working conditions can be accurately and effectively detected. Specifically, the sensor 6 is fixedly arranged on the housing of the transmission assembly 5 by means of bolts. By using a bolted connection, it is possible to quickly replace the sensor 6 after damage.

The detection method provided by the present invention can quickly and accurately identify the vibration generation position and vibration energy level of the transmission assembly 5 under different working conditions, and greatly improve the work efficiency of investigating the cause of product vibration and solving the problem of vibration and noise concerned by customers.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. A method for detecting vibration of a transmission assembly, comprising the steps of: S1. Install the transmission assembly (5) on the test bench, and connect the input end of the transmission assembly (5) with the drive device arranged on the test bench in a driving manner, and the transmission assembly (5) ) output end is connected with the load device which is arranged on the test bench; A sensor (6) is provided on the transmission assembly (5) for collecting vibration signals during the rotational movement of the transmission assembly (5); The sensor (6) is connected with the fault diagnosis system (11); S2. Start the drive device and the load device, and perform an operation test on the transmission assembly (5) under various operating conditions according to a set process; S3, the fault diagnosis system (11) obtains a rotational speed vibration trend relationship curve according to the vibration signal and the rotational speed of the input end of the transmission assembly (5), and records vibration data; S4. The fault diagnosis system (11) performs order calculation and order analysis on the rotational speed vibration trend relationship curve and the vibration data to identify the vibration source. 2 . The method for detecting vibration of a transmission assembly according to claim 1 , wherein, in the step S3 , a vibration analyzer is used to collect and record vibration data. 3 . 3. The method for detecting vibration of a transmission assembly according to claim 1, wherein in the step S4, the methods used in order calculation and order analysis include global trend analysis, order spectrum analysis, Waterfall chart analysis and heatmap analysis. 4. A method for detecting vibration of a transmission assembly according to claim 1, wherein the driving device comprises a first electric dynamometer (1), a reduction gear box (3), the first electric dynamometer The power machine (1) is connected to the input end of the reduction gear box (3) through a first coupling (2), and the output end of the reduction gear box (3) is drivingly connected to the transmission assembly (5). . 5 . The method for detecting vibration of a transmission assembly according to claim 4 , wherein the first coupling ( 2 ) is an elastic diaphragm coupling. 6 . 6. A method for detecting vibration of a transmission assembly according to claim 1, wherein the load device comprises a speed-up gearbox (8) and a second electric dynamometer (10), the speed-up gear The input end of the box (8) is drivingly connected with the output end of the transmission assembly (5), and the output end of the speed-up gearbox (8) is connected to the second electric dynamometer (10) through a second connection. The shaft (9) is connected. 7 . The method for detecting vibration of a transmission assembly according to claim 6 , wherein the second coupling ( 9 ) is an elastic diaphragm coupling. 8 . 8 . The method for detecting vibration of a transmission assembly according to claim 6 , wherein the second electric dynamometer ( 10 ) is electrically connected to the power grid through a voltage stabilizing device. 9 . 9 . The method for detecting vibration of a transmission assembly according to claim 1 , wherein the test bench is connected to a prefabricated concrete foundation, the concrete foundation is installed in a concrete pit, and the concrete foundation is connected with the 9 . A shock absorber is arranged between the concrete pits. 10 . The method for detecting vibration of a transmission assembly according to claim 1 , wherein the sensor ( 6 ) is a vibration acceleration sensor. 11 .

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