Hydraulic control system for scooptram

A technology of hydraulic control system and scraper, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problems that the scraper cannot start and turn quickly at the same time, and uses few components, and achieves a simple structure and uses components. Fewer, reliable results

Active Publication Date: 2012-07-04
中钢集团衡阳机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention only needs one electric hydraulic pump to supply oil to the brake and the steering oil cylinder successively, uses few components, and overcomes the technical defect in the prior art that the scraper cannot start and turn quickly at the same time when the hydraulic system fails. In addition, the invention Simple structure, reliable operation, can be widely used in vehicles with similar hydraulic systems

Method used

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  • Hydraulic control system for scooptram
  • Hydraulic control system for scooptram
  • Hydraulic control system for scooptram

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0012] Embodiment 1, see figure 1 :

[0013] From figure 1 It can be seen that the right pump of the dual gear pump 16 is used for the oil supply of the brake circuit, and the left pump is used for the oil supply of the steering circuit. Valve 5, foot brake valve 8, electromagnetic reversing valve 13, brake 17, double gear pump 16, the right pump is directly connected to the input end of filling valve 5, the backup oil supply branch and the input end of electromagnetic reversing valve 13 Both are connected to the output end of the foot brake valve 8, one of the two output ports of the electromagnetic reversing valve 13 is connected to the brake 17, and the other is connected to the input end of the steering control valve 4 through the reverse check valve 18. When the system works normally, the electric hydraulic pump 9 does not start, which will not interfere with the normal work of the hydraulic system. The left pump of the dual gear pump 16 supplies oil to the steeri...

Embodiment approach 2

[0015] Implementation mode two, see figure 2 :

[0016] From figure 2 It can be seen that this embodiment is compared with the above-mentioned embodiment, the double gear pump 16 right pump of this embodiment is directly connected to the input end of the filling valve 5, and the backup oil supply branch is connected to the input end of the foot brake valve 8, and the electromagnetic One of the two output interfaces of the reversing valve 13 is connected to the brake 17 , and the other is connected to the input end of the steering control valve 4 through the reverse check valve 18 . ( figure 2 )

Embodiment approach 3

[0017] Implementation mode three, see image 3 :

[0018] Compared with Embodiment 1, the right pump of the double gear pump 16 in this embodiment is directly connected to the input end of the filling valve 5, and the backup oil supply branch and the input end of the electromagnetic reversing valve 13 are connected to the output end of the accumulator 6. One of the two output interfaces of the electromagnetic reversing valve 13 is the input end of the foot brake valve 8, and the other is connected to the input end of the steering control valve 4 through the reverse check valve 18. ( image 3 )

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Abstract

The invention discloses a hydraulic control system for a scooptram. The hydraulic control system comprises a braking loop which is subjected to oil supply through a right pump of a duplex gear pump and a steering loop which is subjected to oil supply through a left pump of the duplex gear pump, wherein the braking loop or the steering loop is also connected with a backup oil supply branch circuit; the backup oil supply branch circuit is controlled by an electromagnetic reversing valve to alternatively supply oil to the braking loop and the steering loop; the input end of the electromagnetic reversing valve is connected to a part behind a gathering point between the backup oil supply branch circuit and the braking loop or connected to a part behind a gathering point between the backup oil supply branch circuit and the steering loop; and one of two output ports of the electromagnetic reversing valve is connected with the input port of a steering control valve of the steering valve, and the other output port of the electromagnetic reversing valve is connected with the braking loop. According to the hydraulic control system, only one electric hydraulic pump is needed to supply oil to a brake and a steering oil cylinder, so that the technical shortcoming that the scooptram cannot be quickly started and steered at the same time in the prior art when the hydraulic system fails is overcome.

Description

technical field [0001] The invention relates to a scraper hydraulic control system, in particular to the braking and steering parts of the hydraulic system. Background technique [0002] The steering part of the commonly used scraper hydraulic system is supplied with hydraulic oil by the double gear pump to the steering control valve, and the steering of the scraper is realized by controlling the movement of the steering cylinder piston through the steering control valve; the braking part is supplied with hydraulic pressure by the double gear pump. The oil reaches the foot brake valve through the filling valve, and the opening and closing of the foot brake valve controls whether to supply oil to the brake, so as to realize the walking or stopping of the scraper. [0003] There is a manual pump connected in parallel between the foot brake valve and the brake of the brake part of the commonly used hydraulic system. When the brake part encounters a failure, such as when the dou...

Claims

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Application Information

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IPC IPC(8): E02F9/22
Inventor 高梦熊万信群赵金元柳维军刘惠龙
Owner 中钢集团衡阳机械有限公司
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