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Machine tool descending stability control method and system and tractor

A stability control method and technology, applied in the field of tractors, can solve the problems of starting shock, easily damaged implements, shocks, etc., and achieve the effects of small stopping shock, stable starting and good fretting performance.

Active Publication Date: 2021-11-02
JIANGSU XCMG CONSTR MASCH RES INST LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the lifting system, there are mechanical lifting system and electro-hydraulic lifting system, which mainly realize the functions of raising, lowering, floating and stopping of the machine tools. In field operations, it is necessary to perform tillage depth control or floating control. The ascending / descending control is frequently used. Due to the heavy weight of the machine tool, it is easy to cause shock problems during the lifting and descending process, especially during the descending start process. Due to the large load, if the valve port opens quickly, it will cause shock problems when starting. At the same time As the torque of the machine tool increases, the descending speed has an acceleration process. If the machine tool touches the ground at a faster speed, it is easy to damage the machine tool

Method used

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  • Machine tool descending stability control method and system and tractor
  • Machine tool descending stability control method and system and tractor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a control system for lowering stability of implements includes: a main pump 2 driven by an engine 1, the inlet of the main pump 1 communicates with the fuel tank, the outlet of the main pump 1 is respectively connected to the inlet and fixed position of the main overflow valve 3 The inlet of the differential relief valve 5 is connected with the inlet of the machine control valve 6; the outlet of the main relief valve 3 and the outlet of the differential relief valve 5 are connected with the oil tank; the oil return port of the machine control valve 6 is in normal position and connected with the oil tank ; The oil outlet of the implement control valve 6 is connected to the spring chamber of the differential relief valve 5 through the steady-state throttle valve 4, and the oil outlet of the implement control valve 6 is connected with the inlet of the switching valve 8 simultaneously; the opening of the switching valve 8 The oil outlet is connect...

Embodiment 2

[0034] Such as figure 1 , figure 2 As shown, based on the implement descending stability control system described in Embodiment 1, this embodiment provides a implement descending stabilization control method, adopting the implement descending stabilization control system described in Embodiment 1, including: descending the knob to the controller Input the descending command; the controller reads the load information of the suspension mechanism collected by the force sensor and compares it with the set value; when the load information of the suspension mechanism collected by the force sensor is less than the set value, the controller selects no-load or The light load mode controls the lowering of the implement; when the load information of the suspension mechanism collected by the force sensor is greater than or equal to the set value, the controller selects the medium load / heavy load mode to control the lowering of the implement.

[0035] When the load information of the sus...

Embodiment 3

[0070] Based on the implement lowering stability control system described in the first embodiment and the implement lowering stability control method described in the second embodiment, this embodiment provides a tractor, and the tractor is equipped with the implement lowering stability control method described in the first embodiment. Stability control system, and control the stable decline of the implement based on a method for stabilizing the descent of the implement described in the second embodiment

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Abstract

The invention discloses a machine tool descending stability control method and system and a tractor, and belongs to the technical field of tractors. An outlet of a main pump is respectively connected with inlets of a main overflow valve, a fixed-difference overflow valve and a machine tool control valve; an oil outlet of the machine tool control valve is connected with a spring cavity of the fixed-difference overflow valve through a steady-state throttle valve, and meanwhile, the oil outlet of the machine tool control valve is connected with an inlet of a switch valve; an oil outlet of the switch valve is connected with a rodless cavity of a suspension oil cylinder in a suspension mechanism; the rodless cavity of the suspension oil cylinder is simultaneously connected with an inlet of a lowering valve; a rod cavity of the suspension oil cylinder is connected with an inlet of a secondary overflow valve; a position sensor, a force sensor, a descending knob, a target position setting knob and a descending speed setting knob are electrically connected with the input end of a controller; and the output end of the controller is electrically connected with an electromagnetic valve of the machine tool control valve, an electromagnetic valve of the lowering valve and an electromagnetic valve of the switching valve. The machine tool descending stability control method and system and the tractor have the characteristics of being good in micro-motion performance, stable in starting, controllable in descending speed, stable in descending process and the like.

Description

technical field [0001] The invention belongs to the technical field of tractors, and in particular relates to a method and system for controlling the descent and stability of implements and a tractor. Background technique [0002] In the actual work of the tractor, it is mainly adapted to different implements to achieve different field operations. In the control of implements, it is realized by means of the tractor lifting system. Usually, the tractor is equipped with a rear lifting system as standard, and high-end tractors are equipped with a front lifting system. For the lifting system, there are mechanical lifting system and electro-hydraulic lifting system, which mainly realize the functions of raising, lowering, floating and stopping of the machine tools. In field operations, it is necessary to perform tillage depth control or floating control. The ascending / descending control is frequently used. Due to the heavy weight of the machine tool, it is easy to cause shock pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B19/00F15B15/28F15B21/08A01B63/02
CPCF15B13/02F15B19/00F15B15/2815F15B21/08A01B63/02A01B63/1006F15B21/082F15B21/087
Inventor 张笑张露云张洪波秦浩良
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD
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