Damping buffering method of large-flow throttling buffering cartridge valve, and cartridge valve

Abstract

The invention discloses a damping buffering method of a large-flow throttling buffering cartridge valve. In the method, the buffering and vibration damping design of an oil way is used in order to enable the oil way to gradually narrow and to be inserted into a throttling buffering groove at the tail end of the upward or downward movement of a valve core so as to form a throttling buffering, so that a throttling port is gradually reduced so as to gradually reduce the flow damping buffering and improve the damping buffering performance. Thus, the energy supply efficiency of the cartridge valveis higher. The invention also discloses the cartridge valve. The valve core is changed to a straight integrated type, and thus is convenient to machine and assemble, thereby saving machining and assembling cost. A guide shaft and a valve cover are integrallu formed, so that an oil passage entering the guide shaft is not required to be sealed, thereby avoiding the form and position tolerance of the guide shaft, improving the use effect and performance, and improving the flow stability. The method realizes damping buffering by synchronously improving the structure and the process, improves thefunction output and the stability, prevents the impact vibration at the tail end of the movement, prolongs the service life and is suitable for heavy hydraulic piling equipment.

Description

technical field [0001] The invention relates to the technical field of hydraulic piling equipment, in particular to a damping and buffering method for a large-flow throttling buffering cartridge valve of heavy hydraulic equipment and the cartridge valve. Background technique [0002] Common pile drivers in construction engineering include hydraulic walking diesel hammer pile drivers and high-frequency hydraulic vibration pile drivers. With the progress of society and the continuous improvement of the level of science and technology, it also drives the continuous improvement of the technical level of the construction field. At present, my country's large-scale hydraulic pile drivers are still in the development stage, and the technology is not yet mature. It is imported from abroad, and imported equipment cannot meet the current demand for large-scale hydraulic pile drivers in our construction field, which is not conducive to the development of my country's construction field....

AI Technical Summary

Problems solved by technology

[0006] The inventor has previously applied for a Chinese invention, the application number is CN201810231193.X, which discloses a large-flow dynamic output control method of a cartridge valve and a cartridge valve. The cartridge valve includes a valve sleeve and a valve sleeve end cover , guide shaft fixing seat, fixed flange, guide shaft and valve core. The outer surface of the valve core is curved and forms multiple steps. The processing and assembly of the curved valve core is difficult, which affects the processing and assembly costs; The guide shaft is installed on the end cover of the valve sleeve by using the guide shaft fixing seat and the fixing flange. When the guide shaft is assembled with multiple parts, it is easy to have shape and position tolerances during assembly and use, which will affect the accuracy and affect the use effect and performance. The oil passage of the guide shaft needs to pass through the guide shaft fixing seat, which requires multiple sealing treatments and has a complex structure; in addition, a spring buffer is provided between the valve core and the guide shaft fixing seat, and the spring buffer is used to reduce the time when the valve core changes direction. The impact force is high, and the spring is used as a buffer, its service life and buffer performance are limited, and the failure rate of the equipment is difficult to control, and it is not suitable for heavy hydraulic piling equipment

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