Method for controlling fast discharge of rotary drill rig
A technology of rotary drilling rig and rotary excavator, which is applied in the direction of earth mover/shovel, construction, etc., which can solve the problems of slow response speed and achieve the effect of fast response speed, reliable performance and simple structure
Active Publication Date: 2011-04-20
SUNWARD INTELLIGENT EQUIP CO LTD +1
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Problems solved by technology
[0002] The oil pump used in the hydraulic system of the rotary excavator is a feedback variable pump. The oil tank, hydraulic main pump, feedback variable pump, throttle channel, reversing valve coupling and actuator of the hydraulic system of the rotary excavator are connected according to the process requirements. When the excavator adopts the mode of forward and reverse power head switching soil throwing, the variable response time of the feedback variable pump is an important factor affecting the impact of soil throwing. The usual method is to control the power head rotation by taking the signal from the reversing valve coupling Feedback the variable of the variable pump, then its response speed is affected by the throttling of the channel, and the response speed is slow
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[0009] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0010] see figure 1 , fuel tank 1, hydraulic main pump 2, feedback variable pump 3, throttle channel 6, reversing valve unit 7 and actuator 8 are connected according to process requirements, and the outlet of hydraulic main pump 2 is connected to the feedback variable through oil pipe 4 and electromagnetic cut-off valve 5 The variable Ls port of pump 3 is connected.
[0011] see figure 1 , the outlet of the hydraulic main pump 2 is connected to the variable Ls port of the feedback variable pump 3 through the oil pipe 4 and the electromagnetic cut-off valve 5. The outlet is to the variable Ls port of the feedback variable pump 3, so that the oil pressure at the outlet of the hydraulic main pump 2 is directly fed back to the variable Ls port of the feedback variable pump 3 without passing through the reversing valve joint 7 and the throttling c...
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The invention discloses a method for controlling fast discharge of a rotary drilling rig. The method comprises the following steps: connecting an oil tank (1), a hydraulic main pump (2), a feedback variable displacement pump (3), a throttle path (6), a reversing valve coupling (7) and an actuator (8) of a hydraulic system of the rotary drilling rig according to process requirements; directly communicating pressure oil from the hydraulic main pump (2) with an variable displacement Ls hole of a feedback variable displacement pump (3) by a pressure flow controller and an oil tube (4); increasing variable displacement feedback pressure of the feedback variable displacement pump (3) at initial stage, and expediting a variable displacement response speed of the feedback variable displacement pump (3) when the reversing valve coupling (7) operates. Increased variable displacement speed of the feedback variable displacement pump (3) expedites pressure rise of the variable displacement Ls hole of the feedback variable displacement pump (3) and response of the whole system action. The pressure flow controller is an electromagnetic shut-off valve (5). The method for controlling fast discharge of a rotary drilling rig has simple structure, reliable performance and high response speed.
Description
technical field [0001] The invention relates to a method for controlling a rotary drilling rig to quickly throw soil. Background technique [0002] The oil pump used in the hydraulic system of the rotary excavator is a feedback variable pump. The oil tank, hydraulic main pump, feedback variable pump, throttle channel, reversing valve coupling and actuator of the hydraulic system of the rotary excavator are connected according to the process requirements. When the excavator adopts the mode of forward and reverse power head switching soil throwing, the variable response time of the feedback variable pump is an important factor affecting the impact of soil throwing. The usual method is to control the power head rotation by taking the signal from the reversing valve Feedback the variable of the variable pump, then its response speed is affected by the throttling of the channel, and the response speed is slow. Contents of the invention [0003] The technical problem to be solv...
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IPC IPC(8): E02F5/20E02F9/20
Inventor 何清华朱建新郭勇曾素张奇志
Owner SUNWARD INTELLIGENT EQUIP CO LTD