Service braking system of four-axle chassis and crane with same

Abstract

The invention discloses a service braking control system of a four-axle chassis. The service braking control system is characterized in that a brake valve is communicated with a control port of a first relay valve of a first brake circuit, brake chambers are used for controlling a second axle, the brake chambers arranged on the left and right sides of a first axle are respectively controlled and communicated by a second relay valve and a third relay valve, and a control port of the second relay valve and a control port of the third relay valve are respectively communicated with an air outlet of an anti-lock magnetic valve of the second axle; a braking valve is communicated with a control port of a fourth relay valve of a second brake circuit, brake chambers are used for controlling a fourth axle, and the brake chambers arranged on the left and right sides of a third axle are respectively controlled and communicated by a fifth relay valve and a sixth relay valve; a control port of the fifth relay valve and a control port of the sixth relay valve are respectively communicated with the air outlet of an anti-lock magnetic valve of a fourth axle, and an abnormal anti-lock phenomenon of the second axle and the fourth axle is fully avoided through system optimization configuration. The invention also provides a crane with the service braking system.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a four-axle chassis service braking system and a crane with the service braking system. Background technique [0002] With the continuous development of the world economy, large-scale infrastructure projects such as wind power and large-scale petrochemicals are increasing, and all-terrain truck chassis cranes are widely used; especially, the chassis of four-axle cranes can be quickly put into operation due to its flexible movement and rapid transition. , favored by the market. As we all know, truck chassis cranes need to have good braking performance during road driving and lifting operations to meet the safety requirements of the overall machine performance. [0003] At present, the service brake control system of the all-terrain four-axle truck crane is a dual-circuit pneumatic brake control system. Specifically, the first and second bridges are controlled by a ...

AI Technical Summary

Problems solved by technology

However, the load on the second axle is less than that of the first axle during service braking, and even under the same braking torque, it is more likely to lock up than the first axle, and the ABS control system controls the braking of the first axle. Therefore, During the braking process, the second bridge is prone to lock-up

[0005] Secondly, the connection mode of the foot relay valve of the third and fourth axles is the same as that of the first and second axles. During the braking process, the load on the fourth axle is less than that of the third axle, and the braking torque provided by the brake circuit of the fourth axle is greater than that of the third axle, and there is no ABS. When the system controls the braking, the four axles are prone to lock-up, causing the whole machine to brake and flick

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