Technical Information
Off-road electric drive mining dump truck electric brake deceleration performance test inspection te
[ 12-06-2024 ]
The method for testing the electric brake deceleration performance of off-road electric drive mining dump trucks is mainly carried out in accordance with the relevant provisions of the national standards of the People's Republic of China. The following is a detailed explanation of the test method:
1. Test Preparation
Test road:
Select a sufficiently long acceleration and electric brake test section on the specified road.
Vehicle setting:
For electric dump trucks where the electric brake pedal and the driving brake pedal are not separately set, it is necessary to ensure that the driving brake pedal does not work temporarily during the test, and only the electric brake works when the brake pedal is stepped on.
Sensor arrangement:
Voltage sensor: used to measure the power battery bus voltage, drive motor voltage, and brake voltage.
Current sensor: used to measure the power battery bus current, drive motor current, and brake current.
Other preparations:
Ensure that the mechanical brake system pressure reaches the rated value.
The electric dump truck accelerates in the acceleration section and has a stable speed of 20km/h and 30km/h respectively before entering the test section.
2. Test steps
Triggering electric braking:
After checking that the mechanical brake system pressure reaches the rated value, the electric dump truck accelerates to the predetermined speed in the acceleration section.
Trigger the electric brake quickly and maintain it until the vehicle speed drops below 3km/h.
Record data:
During the test, record the speed, distance, and time of the entire electric braking process.
At the same time, record the power battery bus voltage, bus current, braking voltage, current, and drive motor voltage and current.
Test repetition:
Repeat the test once in the opposite driving direction to take the average of the two test results.
III. Data processing
Draw curves:
Draw the vehicle speed-braking distance curve, drive motor voltage/current-time curve, power battery bus voltage/current-time curve, and braking voltage/current-time curve according to the test data.
Result analysis:
By analyzing these curves, the stability and efficiency of the electric brake deceleration performance can be evaluated.
IV. Test result recording
Record content:
The test results should be recorded in the corresponding national standard table, such as the table specified in GB/T35197-2017.
Evaluation criteria:
According to the provisions in the national standard, the test results are evaluated to determine whether the electric brake deceleration performance of the off-road electric drive mining dump truck meets the requirements.
Precautions
When conducting the test, the safety of the test environment should be ensured to prevent safety accidents caused by vehicle loss of control or equipment failure.
The operator should be familiar with the test steps and precautions, and perform the test operation in strict accordance with the standards.
During the test, the vehicle's operating status and data changes should be closely monitored to promptly detect and handle abnormal situations.
In summary, the method of testing the electric brake deceleration performance of off-road electric drive mining dump trucks includes test preparation, test steps, data processing, and test result recording. Through strict testing and inspection, it can be ensured that the electric brake deceleration performance of off-road electric drive mining dump trucks meets the relevant standards and requirements, providing a strong guarantee for the safety and efficiency of mine transportation.
1. Test Preparation
Test road:
Select a sufficiently long acceleration and electric brake test section on the specified road.
Vehicle setting:
For electric dump trucks where the electric brake pedal and the driving brake pedal are not separately set, it is necessary to ensure that the driving brake pedal does not work temporarily during the test, and only the electric brake works when the brake pedal is stepped on.
Sensor arrangement:
Voltage sensor: used to measure the power battery bus voltage, drive motor voltage, and brake voltage.
Current sensor: used to measure the power battery bus current, drive motor current, and brake current.
Other preparations:
Ensure that the mechanical brake system pressure reaches the rated value.
The electric dump truck accelerates in the acceleration section and has a stable speed of 20km/h and 30km/h respectively before entering the test section.
2. Test steps
Triggering electric braking:
After checking that the mechanical brake system pressure reaches the rated value, the electric dump truck accelerates to the predetermined speed in the acceleration section.
Trigger the electric brake quickly and maintain it until the vehicle speed drops below 3km/h.
Record data:
During the test, record the speed, distance, and time of the entire electric braking process.
At the same time, record the power battery bus voltage, bus current, braking voltage, current, and drive motor voltage and current.
Test repetition:
Repeat the test once in the opposite driving direction to take the average of the two test results.
III. Data processing
Draw curves:
Draw the vehicle speed-braking distance curve, drive motor voltage/current-time curve, power battery bus voltage/current-time curve, and braking voltage/current-time curve according to the test data.
Result analysis:
By analyzing these curves, the stability and efficiency of the electric brake deceleration performance can be evaluated.
IV. Test result recording
Record content:
The test results should be recorded in the corresponding national standard table, such as the table specified in GB/T35197-2017.
Evaluation criteria:
According to the provisions in the national standard, the test results are evaluated to determine whether the electric brake deceleration performance of the off-road electric drive mining dump truck meets the requirements.
Precautions
When conducting the test, the safety of the test environment should be ensured to prevent safety accidents caused by vehicle loss of control or equipment failure.
The operator should be familiar with the test steps and precautions, and perform the test operation in strict accordance with the standards.
During the test, the vehicle's operating status and data changes should be closely monitored to promptly detect and handle abnormal situations.
In summary, the method of testing the electric brake deceleration performance of off-road electric drive mining dump trucks includes test preparation, test steps, data processing, and test result recording. Through strict testing and inspection, it can be ensured that the electric brake deceleration performance of off-road electric drive mining dump trucks meets the relevant standards and requirements, providing a strong guarantee for the safety and efficiency of mine transportation.