Hydraulic auxiliary braking system for mining dump vehicle and control method thereof

Abstract

The invention discloses a hydraulic auxiliary braking system for a mining dump vehicle and a control method thereof. The hydraulic auxiliary braking system for the mining dump vehicle comprises a braking oil supply system; the braking oil supply system is connected with a pressure switch and connected with an auxiliary braking oil supply system, a parking brake system and a service braking system via one-way valves I; the auxiliary braking oil supply system is supplied with pressure oil liquid by a bidirectional constant displacement pump; the parking brake system comprises an independent energy accumulator; and the service braking system is provided with double independent brake oil paths. The hydraulic auxiliary braking system for the mining dump vehicle has the advantages that the effect is obvious; the system is convenient and easy to use; by using the auxiliary braking oil supply system, the parking brake system and the service braking system, space limitation and non-continuation caused by using the energy accumulator as a power source are avoided; meanwhile, limitation of completely depending on an external power source is also avoided; the continuation and reliability of auxiliary braking are improved; and the application range of the auxiliary braking system is expanded.

Description

technical field [0001] The invention relates to a hydraulic auxiliary braking system, which belongs to the technical field of engineering machinery hydraulics, in particular to a mining dump truck hydraulic auxiliary braking system and a control method thereof. Background technique [0002] The braking system is one of the most critical systems in mine transport dump trucks. It always determines the driving safety and reliability of the vehicle. Therefore, the braking system standard including the auxiliary braking system (ie ISO3450 or GB / T 21152 ) is a standard that almost all minecart vehicles must meet. At present, the auxiliary braking systems that meet the standards all use the brake accumulator as the auxiliary power source. When the braking system fails, the high-pressure oil source of the accumulator can satisfy no less than 5 times of complete braking. However, in practice, as the transportation distance increases, this standard can only meet the basic needs of ve...

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Problems solved by technology

[0005] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a mining dump truck hydraulic auxiliary braking system and its control method, which can satisfy the situation that the brake oil supply system cannot work, with the help of a spare small-capacity manual pump and auxiliary The brake pump provides a continuous, stable and reliable source of brake pressure for the vehicle to meet long-distance, long-term trailer braking requirements and other braking capabilities

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