Swing hydraulic cylinder with damping function

Abstract

The invention relates to the field of hydraulic machinery, and provides a swing hydraulic cylinder with a damping function. A hydraulic oil entering through a hydraulic oil inlet pushes a piston gearsleeve to reciprocate linearly, the piston gear sleeve and a rear gland are meshed through a spiral gear, the rear gland is fixed, the piston gear sleeve is also rotated in a spiral direction in the moving process, and the piston gear sleeve is meshed with an outer helical gear of an output shaft through an inner helical gear, so that the output shaft generates reciprocating rotary motion; a hydraulic oil inlet and a hydraulic oil outlet are each provided with two channels, the two channels are separated by a certain distance, and one channel is provided with a damping structure; and an oil cavity of the piston gear sleeve is a conical surface, the conical surface structure of the piston gear sleeve gradually seals the first channel of the hydraulic oil outlet in the process of running theend point, and hydraulic oil flows out only in the channel with the damping structure at the rear. According to the swing hydraulic cylinder, the opening and closing requirements of a flap valve canbe well met, the working reliability of the flap valve is improved, the transient noise of a valve opening and closing is reduced, and the valve closing signal is reliably output.

Description

technical field [0001] The invention relates to the field of hydraulic machinery, in particular to a swing hydraulic cylinder with a damping function. Background technique [0002] Hydraulic cylinders have the characteristics of fast opening and closing speed and large opening and closing torque, and are widely used in the fields of valve opening and closing control and driving of other mechanical components. [0003] The opening and closing action of a high-pressure tongue valve on a ship needs to be completed by a hydraulic cylinder. It is required to have a closing signal output after the valve is closed. At the same time, it is required that the valve should not hit the valve body when opening and closing, so as to reduce noise and improve the reliability of the valve. At present, the commonly used hydraulic cylinders have problems such as large volume, and the valve hits the valve body at high speed when the opening and closing reaches the end position, resulting in lar...

AI Technical Summary

Problems solved by technology

At present, the commonly used hydraulic cylinders have problems such as large volume and high noise when the valve hits the valve body at high speed when the opening and closing reaches the end position.

Images