HammerThe main work is composed of cylinder, piston rod, drill rod, reversing valve, accumulator, oil seal parts and other parts. The hydraulic system principle of the excavator equipped with a breaker is an excavator equipped with a hydraulic breaker, regardless of the operation of the breaker Whether, other working devices of the excavator can still work normally. The main reversing valve of this system usually uses the spare valve reserved on the main operating valve group of the excavator, and the pressure oil for the breaker is supplied by one of the main valves of the excavator. The pump is provided, and the working pressure of the breaker can be adjusted by modifying the relief valve; the high-pressure stop valve must be modified at the inlet and outlet of the breaker, which is conducive to the optimization and maintenance of operating system parameters.
The mechanical energy of the hydraulic oil inlet plus the mechanical energy of the accumulator pushes the cylinder rod up to compress the nitrogen chamber. After pushing down the commanding height, the reversing valve changes its position. The mechanical energy of the hydraulic oil inlet plus the mechanical energy of nitrogen compression pushes the cylinder rod down quickly and strikes the drill rod to start the crushing operation. Breaking hammer The reversing valve is a high-precision accessory. If the valve parts are not used properly, the impact on the working efficiency of the breaker will be very obvious.
Common faults include reversing valve sticking. When the breaker was dismantled and inspected, it was found that everything else was intact. After inspecting the reversing valve, it was found that the sliding was tight and easy to get stuck. After removing the reversing valve spool, it was found that the valve body It has been strained in many places. (Replace the spool of the reversing valve)
The replacement of the bushing was unreasonable. After the bushing was replaced, the breaker stopped running. It did not strike when pressed, and there was a striking action after a brief mention. Because after the bushing was replaced, the piston part should be tilted upward, causing the cylinder to The control oil circuit of some small reversing valves has been closed at the starting point, and the reversing valve stops running, causing the breaker to stop running. (Replace the original or regular bushing)
