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Forklift pressure closed-loop control method and control system using same

A closed-loop control, forklift technology, used in fluid pressure actuation system testing, fluid pressure actuation devices, servo motors, etc., can solve the problems of high energy consumption, large flow loss, large pressure loss, etc. The effect of low power consumption, reduced output flow, and improved work efficiency

Pending Publication Date: 2022-08-05
NINGBO ANXIN CNC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of forklift pressure control oil circuit has a large flow loss and a large pressure loss, resulting in a large energy consumption for the forklift.

Method used

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  • Forklift pressure closed-loop control method and control system using same
  • Forklift pressure closed-loop control method and control system using same
  • Forklift pressure closed-loop control method and control system using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A forklift pressure closed-loop control method proposed in this embodiment, such as figure 1 and image 3 shown, it includes the following steps:

[0031] Step 1: On the basis of the forklift pressure control oil circuit, a bypass oil return circuit R1 is added to the three-piece multi-way valve A, and the oil inlet of the bypass oil return oil line R1 is connected to the three-piece multi-way valve. In A, the oil outlet of the straight oil passage connecting the first piece A1, the second piece A2 and the third piece A3 is connected, and the main oil return oil passage R2 in the three-piece multi-way valve A is connected with the three-piece type In the multi-way valve A, the oil outlet of the straight oil passage connecting the first piece A1, the second piece A2 and the third piece A3 is not connected, and the oil outlet of the bypass oil return oil passage R1 passes through the bypass oil return oil pipe R3 Connect with the fuel tank F; then connect a pressure sen...

Embodiment 2

[0042] This embodiment proposes a control system using the forklift pressure closed-loop control method of the first embodiment, such as figure 1 and figure 2 As shown, it includes a hoisting oil circuit 1 used to realize the lifting and lowering of heavy objects by a forklift, an inclined oil circuit 2 used to realize the forklift tilting forward and backward leaning the heavy objects, a steering oil circuit 3 used to realize the steering of the forklift truck, and a gear pump. B. Motor C, fuel tank F, forklift controller, and three-piece multi-way valve A, three-piece multi-way valve for distributing hydraulic oil flow to hoisting oil circuit 1, tilting oil circuit 2, and steering oil circuit 3 A has a first sheet body A1, a second sheet body A2 and a third sheet body A3, the three-piece multi-way valve A is provided with a main oil return oil circuit R2, and the three-piece multi-way valve A is additionally provided with a bypass oil return The oil passage R1, the oil inl...

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Abstract

The invention discloses a forklift pressure closed-loop control method and a control system using the forklift pressure closed-loop control method. A bypass oil return path is additionally arranged in a three-piece multi-way valve, a pressure sensor is connected to the position, close to an oil outlet of the bypass oil return path, of a bypass oil return pipe, a PI regulator is integrated in a forklift controller, and the forklift pressure closed-loop control method comprises the steps that a pressure sensor is connected to the pressure sensor; the pressure sensor is used for collecting pressure data of hydraulic oil in the bypass oil return pipe and transmitting the pressure data to the PI regulator, the PI regulator outputs hydraulic oil control flow, the forklift controller conducts flow amplitude limiting on the hydraulic oil control flow, and then the flow is controlled according to the hydraulic oil output after flow amplitude limiting. The rotating speed of the motor is controlled so that the gear pump can control the flow to output according to the hydraulic oil output after flow amplitude limiting, the mode of changing the flow output in real time according to pressure data feedback achieves the purposes of reducing the flow and pressure loss leaked from a bypass oil return way, enabling the oil way pressure to form closed-loop control, improving the working efficiency and reducing the cost. The energy-saving effect is achieved, and the working energy consumption of the forklift is lower.

Description

technical field [0001] The invention relates to a forklift control technology, in particular to a forklift pressure closed-loop control method and a control system using the same. Background technique [0002] In recent years, as the country's requirements for energy conservation and emission reduction have become higher and higher, and it is planned to reach the carbon peak in 2030 and achieve carbon neutrality in 2060, this will inevitably challenge the existing energy consumption of forklifts. In order to better achieve the dual carbon goal, a more energy-efficient control system must be developed based on the existing energy consumption of forklifts. [0003] Existing forklift pressure control oil circuits include lifting cylinders, tilting cylinders, steering cylinders, multi-way valves, steering gears, pumps and motors, fuel tanks, and connecting pipelines. In order to realize the forklift tilting forward and backward leaning heavy objects, the steering cylinder is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/02F15B13/16F15B19/00B66F9/22
CPCF15B11/08F15B13/16F15B13/022F15B19/00B66F9/22Y02T10/84
Inventor 黄兆立顾颖杰王徐颖许巍巍张荣梁伍成
Owner NINGBO ANXIN CNC TECH
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