Dynamic reversing power-compensating device for hydraulic breaking hammer

Abstract

The invention relates to a dynamic reversing power-compensating device for a hydraulic breaking hammer, which comprises a valve body, a reversing valve core and a reversing valve sleeve, wherein the reversing valve core and the reversing valve sleeve are installed in the valve body; a constant-pressure chamber is arranged between the valve body and the reversing valve sleeve, and the upper part of the constant-pressure chamber is communicated with a dynamic oil cavity through a constant-pressure hole; a dynamic valve core is arranged in the dynamic oil cavity; a groove is formed in an excircle of the dynamic valve core; a spring is arranged behind the dynamic valve core; a valve seat is arranged behind the spring; and an oil unloading and filling hole is formed on the spring side. The dynamic reversing power-compensating device has the benefits that the problems of unsmooth reversing channel caused by the reversing lagging of the reversing valve sleeve and the like of the existing hydraulic breaking hammer are solved, so that the reversing valve is sensitive and stable to reverse, the oil temperature is effectively reduced, and the work efficiency of the hydraulic breaking hammer is greatly improved; and the requirements for a mechanical part and a sealing part are reduced, so that the service life is prolonged, and the precious energy resources are saved.

Description

technical field [0001] The invention relates to a hydraulic breaker, in particular to a dynamic reversing power compensation device for a hydraulic breaker. Background technique [0002] At present, the reversing valve of the hydraulic breaker at home and abroad is determined by the reversing position of the piston. However, due to the different crushability of the objects broken by the hydraulic breaker, the pressure of the platform and the degree of crushing of the object are different. The echoes are all dynamic, so the pistons in the actual working conditions basically do not work within the ideal stroke range, causing the reversing valve to lag and return unequally, causing the oil inlet and oil return channels to narrow, making the hydraulic oil Severe extrusion and heat generation lead to a decrease in the required work, and more stringent requirements for mechanical parts and seals, resulting in reduced service life, volatilization of hydraulic oil, and premature agi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of hysteresis and unequal return of the reversing valve of the existing hydraulic breaker, and to provide a dynamic reversing compensation device for the hydraulic breaker, which can realize the reversing valve in different stroke ranges of the piston. Stable reversing and dynamic reset can make up power when the piston is small in stroke, and the oil temperature is the same as the ideal temperature, which reduces the requirements for mechanical parts and seals, prolongs the service life, improves efficiency and saves precious energy.

Images