Platform gravity descending control system and method

Abstract

The invention discloses a platform gravity descending control system which comprises a gear pump. An oil inlet of the gear pump communicates with a hydraulic oil tank, an oil outlet of the gear pump is connected with an oil inlet of a first proportional valve, and an oil outlet of the first proportional valve is connected with an oil inlet P of a third electromagnetic reversing valve. An oil outlet A of the third electromagnetic reversing valve is connected with an oil inlet of a one-way valve, an oil outlet of the one-way valve is connected with a first oil port of a first electromagnetic reversing valve and a first oil port of a second electromagnetic reversing valve, and a second oil port of the first electromagnetic reversing valve and a second oil port of the second electromagnetic reversing valve are connected with a rodless cavity of a first variable-amplitude oil cylinder and a rodless cavity of a second variable-amplitude oil cylinder correspondingly. An oil inlet of a second proportional valve is connected with an oil outlet of the one-way valve, an oil outlet of the second proportional valve is connected with an oil inlet B of the third electromagnetic reversing valve, and an oil outlet T of the third electromagnetic reversing valve communicates with the hydraulic oil tank. The invention further discloses a platform gravity descending control method. According to the disclosed platform gravity descending control system and method, the gravity descending process is not affected by loads, the descending process is more stable and more comfortable, and potential safety hazards of an arm support are reduced.

Description

technical field [0001] The invention relates to a platform gravity descent control system and method, and belongs to the technical field of control of scissor-type aerial work platforms. Background technique [0002] With the rapid development of my country's infrastructure construction, the demand and inventory of construction machinery are also growing rapidly. The requirements are also getting higher and higher. Among many construction machinery, the platform lowering system is one of the important components of manned aerial work products. Compared with the walking system, the platform lowering system determines the lowering operability, comfort and stability of the entire platform, directly It is determined that the operator will use the comfort feeling and immediacy on the platform, and also hope to have a good optimization in terms of safety and energy consumption. [0003] The platform lowering system of the existing off-road scissor-type aerial work platform mainly...

Images