Differential-type plunger composite oil cylinder

Abstract

The invention relates to a differential-type plunger composite oil cylinder, wherein an ear ring at the front end of a piston rod assembly is provided with a bearing, the rear end of the piston rod assembly is of a cylinder barrel structure which is integrally arranged in a cylinder body; the front end of the outer circle of the cylinder barrel is positioned by a rod guide sleeve arranged in a cylinder head; the front end and the rear end of a piston are arranged on the outer circle of the rear end of the piston rod assembly; the middle of the piston is provided with a piston guide sleeve and a rod seal; the rear end of the piston is fixed with the piston rod assembly through threads; a locking sleeve is fixed with the piston rod assembly through threads; a cylinder bottom assembly is fixed on the front end of the cylinder body through an internal hexagon screw; an ear ring at the rear end of the piston bottom assembly is provided with a bushing; the front end of the small cylinder outer circle at the front end is provided with a guiding ring; a gland and a cylinder head are fixed on the rear end of the cylinder body through internal hexagon screws; and the a gland of a dustproof ring is fixed on the gland through an internal hexagon screws, and a dustproof ring is arranged in an inner hole. Through simple structure improvement, multiple working conditions can be realized; and the differential-type plunger composite oil cylinder has the advantages of compact structure, low machining difficulty, convenience for installation and using reliability.

Description

Technical field [0001] The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a differential plunger composite hydraulic cylinder for a full hydraulic oil drilling rig. Background technique [0002] The working conditions of full hydraulic oil drilling rigs are complex, and the work requirements of the main hydraulic cylinder that control the drill bit are high. Not only require large lifting force and long working stroke, but also require adjustable working speed and variable force, which is difficult for ordinary hydraulic cylinders. The present invention aims to solve the above-mentioned problems. [0003] Summary of the invention [0004] In order to overcome the above shortcomings of the prior art, the present invention provides a differential plunger composite hydraulic cylinder with simple structure, convenient disassembly and assembly and high reliability. [0005] The technical solution adopted by the present invention to solve its ...

AI Technical Summary

Problems solved by technology

[0002] The working conditions of the full hydraulic oil drilling rig are complicated, and the main hydraulic cylinder that controls the drill bit has high requirements. Not only does it require a large lifting force and a long working stroke, but it also requires that the working speed can be adjusted and the force changes, which is difficult for ordinary hydraulic cylinders to meet.

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