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Loader walking and braking energy recovery auxiliary driving device and control method

A braking energy recovery and auxiliary drive technology, applied in the direction of earth mover/shovel, construction, etc., can solve the problems affecting vehicle stability and compliance, poor stability and compliance performance, pump motor torque impact, etc. , to achieve the effect of high integration, good control performance, and elimination of sudden changes in torque

Inactive Publication Date: 2015-08-12
HUNAN WANGDA TECH
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AI Technical Summary

Problems solved by technology

Although it solves the problem of not requiring accumulators with different volumes under different braking conditions, the performance in terms of vehicle starting, braking stability and compliance is poor. The main reason is that the control valve is an on-off valve, which only has on and off Two states, when the control valve is opened or closed, the torque of the pump motor has an obvious impact, which affects the stability and compliance of the vehicle

Method used

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  • Loader walking and braking energy recovery auxiliary driving device and control method
  • Loader walking and braking energy recovery auxiliary driving device and control method
  • Loader walking and braking energy recovery auxiliary driving device and control method

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] like figure 1 As shown, a loader walking braking energy recovery auxiliary driving device includes a controller 5, a signal monitoring module, a hydraulic auxiliary driving module, a braking module 6, and the controller 5 communicates with the signal monitoring module and the hydraulic auxiliary driving module through a communication cable. , the brake module 6 and other modules of the loader are connected to receive the state signal collected from the signal monitoring module, and combine the internal program of the controller 5 to process the collected state signal and generate a control command, through which the hydraulic auxiliary drive module , braking module 6, traveling mechanism 9 and other modules perform corresponding actions; the hydraulic drive module is the core component of the loader walking braking energy recovery auxi...

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Abstract

The invention provides a loader walking and braking energy recovery auxiliary driving device and a control method. The walking and braking energy recovery auxiliary driving device comprises a controller, a signal monitoring module, a hydraulic auxiliary driving module and a brake module. The hydraulic auxiliary driving module comprises a pump / motor, a three-way flow valve, a small-size accumulator, a large-scale accumulator, an overflow valve 1 and an overflow valve 2. The control method comprises a pump / motor control step and a three-way flow valve control step. Through a three-way proportional control valve, torque impact on the pump / motor is effectively eliminated, so that a loader is allowed to be more smooth and stable in the driving and brake process, the vehicle control performance can be improved; meanwhile, the three-way flow valve is higher in integration level; and compared with two or more switch valves, fault points are reduced, and the device cost is reduced.

Description

technical field [0001] The invention relates to a loader, in particular to an auxiliary drive device and a control method for recovering braking energy of the loader. Background technique [0002] Loader is a kind of earthwork construction machinery widely used in road, railway, construction, hydropower, port, mine and other construction projects. Parallel hydraulic hybrid loader is the most common application. This type of loader drive system includes diesel engine, hydraulic Torque converter, gearbox, hydraulic pump / motor, hydraulic accumulator, boom cylinder, torque coupling, dump cylinder. The diesel engine is the power source of the drive system. Part of the power output by the diesel engine drives the travel mechanism through the hydraulic torque converter and transmission to realize the loader driving; the other part of the power output by the diesel engine drives the oil cylinder through the oil pump to realize steering and loading. The hydraulic pump / motor, hydraul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F9/20E02F9/22
Inventor 曹显利
Owner HUNAN WANGDA TECH
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