Control method and control system of engineering machinery and engineering machinery

A technology of construction machinery and control method, applied in the hydraulic field, can solve the problems of poor operation comfort and hydraulic shock, and achieve the effect of avoiding hydraulic shock and avoiding the deterioration of operation comfort.

Pending Publication Date: 2022-07-08
ZHEJIANG SANY EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a control method, control system and construction machinery for construction machinery, which are used to solve the pr

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  • Control method and control system of engineering machinery and engineering machinery
  • Control method and control system of engineering machinery and engineering machinery
  • Control method and control system of engineering machinery and engineering machinery

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Embodiment Construction

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] The features of the terms "first" and "second" in the description and claims of the present invention may expressly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] The boom on the construction machinery is installed on the vehicle body, and the movement of the boom is driven by the movement o...

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Abstract

The invention relates to the technical field of hydraulic pressure, and provides a control method and system of engineering machinery and the engineering machinery. The control method of the engineering machinery comprises the following steps: inputting an expected rotation angular velocity omega of the arm support, and acquiring a current angle parameter theta of the arm support by a controller; the controller obtains the flow Q cylinder theoretically flowing out of the rodless cavity according to the angular velocity omega and the angle parameter theta; the controller obtains the pressure difference P of the two sides of the balance valve; the pilot pressure of the balance valve is obtained according to the flow Q cylinder flowing through the balance valve and the pressure difference P; the controller determines control current needing to be input into the electromagnetic valve according to the pilot pressure and the characteristics of the electromagnetic valve, and corresponding control current is input into the electromagnetic valve so as to control the arm support to rotate at the angular speed omega. According to the engineering machinery control method, constant-speed amplitude falling of the cantilever crane is achieved by controlling the opening degree of the valve element of the balance valve, large hydraulic impact is avoided, and then the problem that the operation comfort becomes poor due to natural amplitude falling is avoided.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a control method, a control system and a construction machine of a construction machine. Background technique [0002] In the boom luffing operation of pump trucks, cranes, climbing machines, etc., it is usually the oil cylinder that drives the boom luffing. When the boom is falling, the change of the working angle of the boom is generally realized by the self-weight of the boom, where the working angle refers to the angle between the boom and the horizontal plane. In the process of lowering the boom, due to the different lowering angles of the boom, the gravitational moment of the boom to the cylinder will also be different. The smaller the angle between the boom and the horizontal plane, the greater the torque to the cylinder. Near the end of the drop (especially when the boom is lying down), the angular velocity of the boom is too large, and the load of the cylinder change...

Claims

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Application Information

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IPC IPC(8): F15B11/08F15B13/04F15B19/00F15B21/02B66C23/36B66C23/62B66C23/693
CPCF15B11/08F15B13/04F15B19/00F15B21/02B66C23/36B66C23/62B66C23/705
Inventor 叶俊峰孙浩
Owner ZHEJIANG SANY EQUIP
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