CN-121977830-A - Testing device of paddy field power chassis electric control limited slip differential system

CN121977830ACN 121977830 ACN121977830 ACN 121977830ACN-121977830-A

Abstract

The invention relates to the technical field of torque testing devices, and discloses a testing device of an electric control limited slip differential system of a paddy field power chassis, which comprises a hydraulic station, an electric control limited slip differential system, a load simulation unit, a driving force providing unit, a driving force control unit and a data acquisition unit, wherein the electric control limited slip differential system, the load simulation unit and the driving force providing unit are all arranged at the top of the hydraulic station, the electric control limited slip differential system is connected with the hydraulic station, the load end of the electric control limited slip differential system is connected with the load simulation unit, the driving force providing unit is connected with the power end of the electric control limited slip differential system, the driving force control unit is respectively connected with the load simulation unit, the driving force providing unit and the electric control limited slip differential system, and the data acquisition unit is respectively connected with the load simulation unit and the driving force providing unit. The invention can simulate the actual working environments such as paddy fields, dry lands, paved roads, separated roads and the like, and judge whether the current output torque meets the requirement according to the load condition.

Inventors

WANG ZAIMAN
LI YAXUAN
Zhong Wenneng
HE JIANFEI
XU YIMING
FAN ZUNCHENG
XU SHENJIE
Che Jiejin
Feng Shaoji
XIONG YUXUAN

Assignees

华南农业大学

Dates

Publication Date: 20260505
Application Date: 20260211

Claims (9)

1. The test device of the paddy field power chassis electric control limited slip differential system is characterized by comprising a hydraulic station (103), an electric control limited slip differential system (2), a load simulation unit, a driving force providing unit, a driving force control unit and a data acquisition unit, wherein the electric control limited slip differential system (2), the load simulation unit and the driving force providing unit are all arranged at the top of the hydraulic station (103), the electric control limited slip differential system (2) is connected with the hydraulic station (103), the load end of the electric control limited slip differential system (2) is connected with the load simulation unit, the driving force providing unit is connected with the power end of the electric control limited slip differential system (2), the driving force control unit is respectively connected with the load simulation unit, the driving force providing unit and the electric control limited slip differential system (2), and the data acquisition unit is respectively connected with the load simulation unit and the driving force providing unit.
2. The device for testing the electric control limited slip speed system of the paddy field power chassis according to claim 1, wherein the data acquisition unit comprises a first rotational speed torque sensor (109), a second rotational speed torque sensor (111), a third rotational speed torque sensor (104) and a data acquisition device, the first rotational speed torque sensor (109) is arranged at the connection part of the driving force providing unit and the electric control limited slip speed system (2), the second rotational speed torque sensor (111) and the third rotational speed torque sensor (104) are arranged at the connection part of the load simulation unit and the electric control limited slip speed system (2), and the first rotational speed torque sensor (109), the second rotational speed torque sensor (111) and the third rotational speed torque sensor (104) are connected with the data acquisition device.
3. The device for testing the electric control limited slip differential system of the paddy field power chassis according to claim 1, wherein the driving force control unit comprises an upper computer, a motor control module and a hydraulic control module, the upper computer is respectively connected with the motor control module and the hydraulic control module, the motor control module is respectively connected with the driving force supply unit and the load simulation unit, and the hydraulic control module is connected with the electric control limited slip differential system (2).
4. The device for testing the electric control limited slip differential system of the paddy field power chassis according to claim 3, wherein the motor control module comprises a servo motor driver, a first magnetic powder brake controller and a second magnetic powder brake controller, the upper computer is connected with the driving force providing unit through the servo motor driver, the upper computer is connected with the first magnetic powder brake through the first magnetic powder brake controller, and the upper computer is connected with the second magnetic powder brake through the second magnetic powder brake controller.
5. The test device of the paddy field power chassis electric control limited slip differential system according to claim 3, wherein the hydraulic control module comprises a first voltage control module, a first proportional valve amplifier, a second voltage control module and a second proportional valve amplifier, the upper computer is connected with the first proportional valve amplifier through the first voltage control module, the upper computer is connected with the second proportional valve amplifier through the second voltage control module, and the first proportional valve amplifier and the second proportional valve amplifier are both connected with the electric control limited slip differential system (2).
6. The device for testing the electric control limited slip differential system of the paddy field power chassis according to claim 1, wherein the electric control limited slip differential system (2) comprises a first electric control limited slip differential, a second electric control limited slip differential, a convex gear (121), a bevel gear (120), a transmission shaft (119) and an electric control limited slip differential box (108), the first electric control limited slip differential, the convex gear (121) and the second electric control limited slip differential are all installed on the electric control limited slip differential box (108) through a rotating shaft (122), the electric control limited slip differential box (108) is installed on the top of the hydraulic station (103), the convex gear (121) is connected with the transmission shaft (119) through the bevel gear (120), the transmission shaft (119) is connected with a driving force providing unit through a coupling, the first electric control limited slip differential and the second electric control limited slip differential are all connected with the hydraulic station (103), and the first electric control limited slip differential and the second electric control limited slip differential are both connected with the electric control simulator unit.
7. The device for testing the electric control limited slip differential system of the paddy field power chassis according to claim 6, wherein the first electric control limited slip differential comprises a first wet clutch (117) and a first electromagnetic proportional valve, the first electromagnetic proportional valve is respectively connected with the first wet clutch (117), the hydraulic station and the driving force control unit, and the first wet clutch (117) is connected with the load simulation unit.
8. The test device of the paddy field power chassis electric control limited slip differential system according to claim 6, wherein the load simulation unit comprises a first magnetic powder brake (113), a second magnetic powder brake (105), a first wet clutch (117) and a second wet clutch (118), the first magnetic powder brake (113) and the second magnetic powder brake (105) are both installed at the top of the hydraulic station (103), the first magnetic powder brake (113) is connected with the first wet clutch (117), the second magnetic powder brake (105) is connected with the second wet clutch (118), the first magnetic powder brake (113) and the second magnetic powder brake (105) are both connected with the driving force control unit, the data acquisition unit is installed at the connection position of the first magnetic powder brake (113) and the first wet clutch (117), and the data acquisition unit is installed at the connection position of the second magnetic powder brake (105) and the second wet clutch (118).
9. The device for testing the electric control limited slip differential system of the paddy field power chassis according to claim 1, wherein the driving force providing unit is a driving motor (101).

Description

Testing device of paddy field power chassis electric control limited slip differential system Technical Field The invention relates to the technical field of torque testing devices, in particular to a testing device of an electric control limited slip differential system of a paddy field power chassis. Background The paddy rice production is an important part of the production process of crops in China, the paddy rice production mechanization is an important trend of the development of agricultural mechanization in China, wherein the paddy field power chassis is an operation carrier in the production process of paddy rice, and the paddy rice power chassis has wide application in the processes of planting, weeding, fertilizing and the like. However, the paddy field working environment is complex, the mud feet are different in depth and depth, the ground adhesion force is low, and great challenges are generated on the trafficability of the paddy field power chassis. The existing test bench can only simulate a single road surface or a simple road surface (such as a paved road surface), lacks the reproduction capability of complex working conditions such as paddy fields, dry lands, separated road surfaces (such as one-side paddy field/one-side dry land), and the like, and leads to the performance test and actual disconnection of the differential mechanism, so that the problems of out-of-control slip rate, misalignment of torque distribution and the like of the developed differential mechanism easily occur in a real farmland. The traditional testing device can not adjust output torque in real time according to dynamic load, can only statically test performance under fixed load, and is difficult to verify response speed and limited slip effect of the differential mechanism under abrupt load (such as wheel mud sinking), so that the differential mechanism can not be matched with wheel end load rapidly in actual operation, and energy consumption is increased and trafficability is reduced. The prior art relies on low-precision sensors or single-node measurement (such as only monitoring input torque), and cannot synchronously quantify key parameters such as input/output end rotating speed, torque, slip rate and the like, so that performance evaluation is on-one, and the differential is optimized and lacks data support, and the research and development period is prolonged. The traditional hydraulic system adopts a switch valve or manual pressure regulation, has poor pressure control precision, can not realize dynamic fine adjustment of the pressing force of the wet clutch, and limits the torque distribution precision. The upper limit control of the torque output of the differential mechanism is inaccurate, and the steering flexibility and the anti-skid performance are difficult to balance. The performance of the differential mechanism is verified by relying on actual measurement in the field, the cost is high (the whole machine and the field are needed), the period is long (the limitation of seasons and weather is imposed), and the same working condition is difficult to repeat. The iteration speed of the electric control limited slip differential is low, and the intelligent process of the paddy field agricultural machinery is restricted. Disclosure of Invention The invention aims to overcome the defects in the prior art and provides a testing device of an electric control limited slip differential system of a paddy field power chassis. The test device of the paddy field power chassis electric control limited slip differential system is characterized by comprising a hydraulic station, an electric control limited slip differential system, a load simulation unit, a driving force providing unit, a driving force control unit and a data acquisition unit, wherein the electric control limited slip differential system, the load simulation unit and the driving force providing unit are all arranged at the top of the hydraulic station, the electric control limited slip differential system is connected with the hydraulic station, the load end of the electric control limited slip differential system is connected with the load simulation unit, the driving force providing unit is connected with the power end of the electric control limited slip differential system, the driving force control unit is respectively connected with the load simulation unit, the driving force providing unit and the electric control limited slip differential system, and the data acquisition unit is respectively connected with the load simulation unit and the driving force providing unit. According to the invention, through integrating the hydraulic station, the electric control limited slip differential system, the load simulation unit, the driving force providing unit, the driving force control unit and the data acquisition unit, the accurate reproduction of farmland working conditions in a laboratory is realized, the torque distribution performance of the e