Accumulator replenishing valve of full-hydraulic braking system of engineering machinery

Abstract

The invention discloses an accumulator replenishing valve of a full-hydraulic braking system of engineering machinery, which comprises a replenishing valve oil inlet, two replenishing valve working oil holes and a replenishing valve oil return hole, wherein the two replenishing valve working oil holes are respectively communicated with two accumulators; meanwhile, the two replenishing valve working oil holes are also respectively communicated with oil inlets of two hydraulic master valves, the replenishing valve is provided with two two-position and two-way valves, and the oil outlet of each two-position and two-way valve is communicated with one accumulator; the on positions of the two-position and two-way valves are controlled by oil paths of oil inlets of the two-position and two-way valves, and the oil paths of the oil inlets of the two-position and two-way valves are communicated; and the off positions of the two-position and two-way valves are controlled by oil outlets of the two-position and two-way valves. Adopting the technical scheme, the accumulator replenishing valve is in a full-hydraulic braking system structure, wherein various technological parameters and property indexes meet design requirements of the hydraulic system, the working state is stable and reliable, and the safety property is good.

Description

technical field [0001] The invention belongs to the technical field of engineering machinery, and relates to a brake system for the operation of engineering machinery vehicles. More specifically, the invention relates to an accumulator filling valve of a full hydraulic braking system of engineering machinery. Background technique [0002] In the existing technology, the accumulator filling valve (SL02) used in the full hydraulic braking system of construction machinery has a complicated internal structure, which is not completely controlled by hydraulic pressure. The difficulty is high. The dynamic sealing performance of Guanjian's core components is unstable and prone to leakage, which cannot meet the requirements of the product sealing test, resulting in failure of the brake system accumulator. Contents of the invention [0003] The problem to be solved by the present invention is to provide an accumulator filling valve for a full hydraulic braking system of construction...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, the accumulator filling valve (SL02) used in the full hydraulic braking system of construction machinery has a complicated internal structure, which is not completely controlled by hydraulic pressure. The difficulty is high. The dynamic sealing performance of Guanjian's core components is unstable and easy to leak, which cannot meet the requirements of the product sealing test, resulting in the failure of the brake system accumulator.

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