CN2092622U

CN2092622U - Shock absorber for hydraulic pipelines

Info

Publication number: CN2092622U
Application number: CN 91212636
Authority: CN
Inventors: 王造时; 罗辨之
Original assignee: Sifang Machine-Building And Electronics Co Ltd Shenzhen
Current assignee: Sifang Machine-Building And Electronics Co Ltd Shenzhen
Priority date: 1991-05-07
Filing date: 1991-05-07
Publication date: 1992-01-08

Abstract

The utility model discloses a shock absorber for hydraulic pipelines, which comprises an absorber body, an outer cover, membranes, and a seal end cover; the membranes is installed between the absorber body and the outer cover to form a gas chamber and an oil chamber; the absorber body is provided with an oil flowing passage and an oil flowing hole, and the oil flowing hole communicates the oil flowing passage with the oil chamber. When the oil flows through the shock absorber, a pulse oil flowing part flows into an oil flowing chamber, and the amplitude value of the oil flowing and a pulse momentum are reduced to absorb the shock of the pipelines. When the oil flowing is suddenly stopped, the oil in the oil chamber inversely flows to the oil flowing passage to realize continuous oil returning, and the change of the pulse quantity is reduced to make the oil flowing steady, and reduce the shock which is caused when the oil flowing is suddenly changed. The tryout of the example which is put into practice shows that the shock absorbing effect is very good, and the service life of the oil pipeline can be lengthened.

Description

Shock absorber for hydraulic pipelines

The utility model relates to a kind of vibration damping equipment of hydraulic oil pipe.

Fracture phenomena often takes place down in pressure oil pipe, particularly low pressure return tube in working order.As utilize hydraulic gate that differential principle drives etc., and during work the single face oil return, oil return is a clearance type, the whole process of oil stream is a pulse shape.During oil return, a pulsating quantity is given birth in oil miscarriage, and when flowing through oil pipe, oil pipe is impacted by pulsating quantity to produce to beat, commutate suddenly when switching oil stream joining cunning valve, and the sudden change of oil return flow amplitude, pulsating quantity changes thereupon, and oil pipe is affected again and produces vibration.Frequent clearance type oil extraction, oil stream pulsating quantity is frequent variations thereupon, causes that oil pipe acutely beats, and causes oil pipe often to produce fracture phenomena.

The purpose of this utility model provides a kind of hydraulic pipe line vibration damper, and this vibration damper is laid on the pipeline, can subtract that the primary oil flow pulsating quantity changes and the amplitude of oil stream fluctuation, makes oil stream comparatively steady, thereby reduces tubing vibration.

Fig. 1 is a schematic structure diagram of the present utility model.

The utility model is made of body (1), overcoat (2), barrier film (3) and end cover (4), oil flow channel (5) and oily discharge orifice (6) are arranged on the described body (1), barrier film (3) is loaded between body and the overcoat, form grease chamber (7) and air chamber (8), oil discharge orifice (6) is communicated with oil flow channel and grease chamber, and air chamber communicates with source of the gas passage (9). During duty, be filled with the gas of certain pressure in the air chamber, such as nitrogen; When unexpected oil return stream was flowed through this shock absorber, the oily diverting flow of part entered grease chamber (7) through oily discharge orifice, oil has reduced oily stream amplitude after flowing through and shunting, and shock absorber has absorbed part oil stream pulsation energy, to subtract the primary oil flow pulsating quantity to the impact of oil pipe, reach the purpose that reduces tubing vibration. In addition, enter the hydraulic oil of grease chamber through shunting, barrier film is produced certain pressure, the gas barrier film compression air chamber in produces certain distortion thereupon, and the effect that produces this course of work has 2 points, and the one, the response change that barrier film produces Shape is played the buffer shock-absorbing effect, the 2nd, the reaction force of barrier film response distortion makes the oil that enters the grease chamber carry out the pressure accumulation of energy, switches oil stream when oil distributing valve commutates suddenly, when being the oil return cut, the oil that has the certain pressure energy in the grease chamber flows into the oil pipe oil return through oily discharge orifice, forms continuous oil return, to subtract the variation of primary oil flow pulsating quantity, oil return in the oil pipe is connected, oil stream is comparatively steady, effectively eliminates the high vibration of oil pipe under in working order, avoids oil pipe to break.

Embodiment.Embodiment presses structure fabrication shown in the accompanying drawing.The oil flow channel two ends are provided with pipe joint (10) on the body, establish one-way valve (11) on the gas channels, and barrier film is a butyronitrile oil resistant rubber material; The oil flow channel diameter is 16 millimeters, and grease chamber's capacity is 300 cubic centimetres.Embodiment shows that through on probation effectiveness in vibration suppression is very effective, has eliminated the fracture phenomena that oil pipe takes place because of vibration effectively.

The utility model is good to the effectiveness in vibration suppression of oil pipe, can effectively eliminate the fracture phenomena that oil pipe produces because of vibration, can prolong oil pipe working life widely, and is simple in structure, installs, easy to use.

Claims

1, a kind of hydraulic pipe line vibration damper, it is characterized in that constituting by body [1], overcoat [2], barrier film [3] and end cover [4], oil flow channel [5] and oily discharge orifice [6] are arranged on the described body [1], barrier film [3] is loaded between body and the overcoat, form grease chamber [7] and air chamber [8], oil discharge orifice [6] is communicated with oil flow channel and grease chamber, and air chamber communicates with source of the gas passage [9].

2,, it is characterized in that there is pipe joint (10) at the oil flow channel two ends on the body according to the described vibration damper of claim 1.