A Hydraulic Rock Drilling Machine Realizing Energy Recovery and Utilization
A hydraulic rock drill and energy recovery technology, applied in mechanical equipment, fluid pressure actuating devices, fluid pressure actuating system components, etc., can solve the problems of fluctuation, waste of energy, high temperature aging pressure of hydraulic oil, etc. Prevent cavitation and ensure the effect of impact energy
Active Publication Date: 2022-06-24
CHINA RAILWAY CONSTR HEAVY IND
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Problems solved by technology
[0004] At present, the kinetic energy of rock drills on the market in the return stage is to reduce the kinetic energy of the piston and achieve braking through the throttling and heat generation of hydraulic oil. This method not only wastes energy seriously, but also brings problems of high temperature aging of hydraulic oil and pressure fluctuations. , if the return energy can be rationally used to realize energy recovery, the use cost of the rock drill will be reduced and considerable economic benefits will be brought
Method used
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Embodiment 1
[0032] see figure 1 , figure 1 Shown is the working principle diagram of the existing hydraulic rock drill. The hydraulic rock drill is in the prior art, and the specific structure of the hydraulic rock drill will not be described here. figure 1 In the middle, P0 is the low-pressure oil circuit, and P1 is the high-pressure oil circuit. The working principle of the existing hydraulic rock drill is as follows:
[0033] When the rock drill is drilling normally, the impact frequency is high. The impact of the impact piston on the shank is an inelastic collision. After the piston 9 hits the end face of the shank, under the action of the stress wave, the piston 9 will return to the direction of the stroke action cavity 2 at a certain initial speed (ie figure 1 move to the left), since the return action chamber 8 is always high-pressure hydraulic oil, and the high-pressure accumulator 5 provides an instant emergency oil source to the high-pressure oil circuit, under the action of th...
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The invention provides a hydraulic rock drill for energy recovery and utilization. A buffer cavity is provided between the end of the piston and the cylinder body. A buffer oil tank and an acceleration oil tank are sequentially arranged on the cylinder body along the axial direction of the piston. Oil passage, the oil passage is connected with the buffer chamber, the piston is provided with a damping hole group, the piston moves in the cylinder, and the oil passage is connected with the buffer oil tank or the acceleration oil tank through the damping hole group; the buffer chamber and the low pressure oil circuit of the rock drill are provided There is a first oil circuit, through the first oil circuit, the buffer cavity is replenished during the piston stroke stage, or the piston is decelerated during the return stage; there is a second oil circuit between the acceleration oil tank and the low-pressure oil circuit, through the second oil circuit. The hydraulic oil in the buffer chamber is discharged at the beginning of the return stroke; the buffer oil tank is connected to the energy recovery oil circuit, and the kinetic energy and hydraulic energy of the piston return stage are converted into the driving force of other components through the energy recovery oil circuit, or the piston is decelerated.
Description
technical field [0001] The invention relates to the technical field of rock drills, in particular to a hydraulic rock drill for realizing energy recovery and utilization. Background technique [0002] A rock drill is a tool used to directly mine stone. It drills a blasthole in the rock layer so that explosives can be put in to blast the rock, so as to complete the mining of stone or other stonework. The hydraulic rock drill is powered by high-pressure hydraulic oil, which drives the impact piston to reciprocate at high speed and high frequency. Compared with traditional pneumatic rock drills, it has the advantages of low energy consumption, high efficiency, low noise and fast rock drilling speed, and has developed rapidly. [0003] The rock drill is mainly composed of an impact mechanism and a rotary mechanism. The impact mechanism is composed of cylinder, piston, reversing valve, accumulator and other components. Through the switching of the reversing valve, the hydraulic...
Claims
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IPC IPC(8): F15B21/14F15B1/02F15B15/22E21B6/00
CPCF15B21/14F15B1/02F15B15/222E21B6/00
Inventor 刘飞香廖金军易达云钱垂军徐震祝爽赵贵生胡及雨甘士瑜张坚蒋海华
Owner CHINA RAILWAY CONSTR HEAVY IND