CN103216490A

CN103216490A - Air bag type buffering slow-release cavity arranged at end of hinged pin shaft

Info

Publication number: CN103216490A
Application number: CN201310146896XA
Authority: CN
Inventors: 王艳华
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2013-04-25
Filing date: 2013-04-25
Publication date: 2013-07-24

Abstract

An air bag type buffering slow-release cavity arranged at the end of a hinged pin shaft is structurally composed of a cylinder barrel (1), an oil cylinder head (2), the hinged pin shaft (3), a membrane (4), a sealed seat (5), an inflation check valve (6) and a one-way throttle valve (7). The air bag type buffering slow-release cavity is characterized in that the hinged pin shaft (3) is a step shaft, a step blind hole is arranged in the center, the membrane (4) is tightly pressed on an intersect end face between a large blind hole and a small blind hole by the sealed seat (5), the membrane (4) and an inner hole of the sealed seat (5) can form a sealed cavity, inert gas is inflated into the cavity through the inflation check valve (6), and the cavity can serve as an air bag type energy storage. In a starting process of the oil cylinder, excess flow can push the membrane (4) to further compress the inert gas to enter the cavity at the left end of the membrane (4) to relieve pressure impact. When impact pressure in a rodless cavity of the oil cylinder reduces, fluid originally entering the cavity at the left end of the membrane (4) can gradually flow back to the rodless cavity to act under the action of the compressed gas. Thus, energy is saved, and backflow impact of backflow oil is prevented.

Description

A kind of air sac type buffering slowly-releasing cavity volume that is arranged on hinged bearing pin end

One, technical field:

The present invention relates to a kind of air sac type buffering slowly-releasing cavity volume that is arranged on hinged bearing pin end.

Two, background technique:

Along with China's industrial expansion, hydraulic transmission has been applied on all kinds of heavy machinery equipments widely with control.

Hydraulic jack is a topmost executive component in the Hydraulic Power Transmission System.Its performance has played very big effect to the performance of main frame.

Along with hydraulics today towards the development of high-pressure trend and speed up, the startup impact of hydraulic jack and reversing impact have brought very big hydraulic shock to main frame, have caused the vibrations and the noise of main frame, very easily cause the early stage damage of hydraulic-pressure pump.Hydraulic shock causes the unnecessary consumption of energy, makes the rapid intensification of host hydraulic system, and then has reduced the viscosity of hydraulic work system medium, and the volumetric efficiency of system descends.

Produce the reason that this impact has its band load high-acceleration starting and commutation, the reason of each equipment cooperation of main frame is arranged, also have in the hydraulic system each major control element in the reason of its dynamic response transient process rational Match.At these reasons, people have carried out a large amount of research and discussion, yet these and host work character are inherent, make that people want to take effect very little by the effort that this impact and energy consumption are improved or alleviated to more rational coupling.

At present, on all kinds of high-end hydraulic equipments, the smooth starting of hydraulic jack and energy-conservation buffering are one of difficult problems of puzzlement industry.

Three, summary of the invention:

Purpose of the present invention will be developed a kind of excellent performance exactly, and technology is reliable, the smooth starting of the hydraulic jack of energy-saving and noise-reducing and the new method of energy-conservation buffering.

The present invention is a kind of air sac type buffering slowly-releasing cavity volume that is arranged on hinged bearing pin end, and its structure is combined by cylinder barrel 1, oil cylinder head 2, hinged bearing pin 3, barrier film 4, sealing seat 5, inflation one-way valve 6 and one-way throttle valve 7; It is characterized in that: hinged bearing pin 3 is a multidiameter shaft, and there is a ladder blind hole in its center portion, and barrier film 4 sealed seats 5 are pressed on the crossing end face of big small blind hole; Barrier film 4 is formed a sealed volume with the endoporus of sealing seat 5, has been full of inert gas, the working pressure of a little higher than hydraulic jack of pressure of inert gas by inflation one-way valve 6 in this cavity volume; The left end cavity volume of barrier film 4 is connected with the rodless cavity of oil cylinder by the aperture on one-way throttle valve on the oil cylinder head 27 and the hinged bearing pin 3; The suitable air sac type slowly-releasing accumulator of this cavity volume.

In the start-up course of oil cylinder, unnecessary flow can promote barrier film 4 further compressed inert, enters the left end cavity volume of barrier film 4, has alleviated compression shock; And when the surge pressure in the oil cylinder rodless cavity reduced, the former fluid that enters barrier film 4 left end cavity volumes can progressively flow back to the rodless cavity acting under the effect that is compressed gas, had saved energy, and had prevented flow-reversing impingement.

This structure is especially for long-armed equipment of concrete pump vehicle, at work because the former fixed position of protection of the dynamic load of the jib support hydraulic pressure oil cylinder that jib elasticity causes and maintenance jib is very resultful.

Four, description of drawings:

Accompanying drawing 1 is a structure principle chart of the present invention.

Five, embodiment:

The specific embodiment of the present invention is: in the start-up course of oil cylinder, unnecessary flow can promote barrier film 4 further compressed inert, enters the left end cavity volume of barrier film 4, has alleviated compression shock; And when the surge pressure in the oil cylinder rodless cavity reduced, the former fluid that enters barrier film 4 left end cavity volumes can progressively flow back to the rodless cavity acting under the effect that is compressed gas, saved energy, and had prevented flow-reversing impingement.

Claims

1. an air sac type that is arranged on hinged bearing pin end cushions the slowly-releasing cavity volume, and its structure is combined by cylinder barrel (1), oil cylinder head (2), hinged bearing pin (3), barrier film (4), sealing seat (5), inflation one-way valve (6) and one-way throttle valve (7); It is characterized in that: hinged bearing pin (3) is a multidiameter shaft, and there is a ladder blind hole in its center portion, and the sealed seat of barrier film (4) (5) is pressed on the crossing end face of big small blind hole; Barrier film (4) is formed a sealed volume with the endoporus of sealing seat (5), has been full of inert gas, the working pressure of a little higher than hydraulic jack of pressure of inert gas by inflation one-way valve (6) in this cavity volume; The left end cavity volume of barrier film (4) is connected with the rodless cavity of oil cylinder by one-way throttle valve (7) on the oil cylinder head (2) and the aperture on the hinged bearing pin (3); The suitable air sac type slowly-releasing accumulator of this cavity volume; In the start-up course of oil cylinder, unnecessary flow can promote further compressed inert of barrier film (4), enters the left end cavity volume of barrier film (4), has alleviated compression shock; And when the surge pressure in the oil cylinder rodless cavity reduced, the former fluid that enters barrier film (4) left end cavity volume can progressively flow back to the rodless cavity acting under the effect that is compressed gas, had saved energy, and had prevented flow-reversing impingement.