CN102003490B

CN102003490B - Hydraulic buffer

Info

Publication number: CN102003490B
Application number: CN 201010564814
Authority: CN
Inventors: 朱卫华; 陈冶湘
Original assignee: SJEC Corp
Current assignee: SJEC Corp
Priority date: 2010-11-29
Filing date: 2010-11-29
Publication date: 2012-12-12
Anticipated expiration: 2030-11-29
Also published as: CN102003490A

Abstract

The invention discloses a hydraulic buffer. When a plunger piston is compressed and moves downwards, oil liquid can be sprayed to the lower surface of a disk piece from a throttle gap, and a space is formed between the bottom of the plunger piston and the disk piece and forms negative pressure for throttle effect. On one hand, the oil liquid in an inner cavity of the plunger piston above the disk piece can flow to the space through the throttle gap; on the other hand, after the transition of the space, the oil liquid sprayed from the throttle gap impacts the lower surface of the disk piece, and the oil liquid still has a certain speed at the moment. The oil liquid can flow into the inner cavity of the plunger piston above the disk piece, forms convection with the oil liquid which flows to the space from the inner cavity of the plunger piston above the disk piece through the throttle gap and weakens an oil-gas mixture degree in order to more smoothly buffer the hydraulic buffer.

Description

A kind of hydraulic bjuffer

Technical field

The present invention relates to a kind of hydraulic bjuffer.

Background technique

Existing hydraulic bjuffer; Comprise plunger guide bush, hollow plunger, be fixedly installed on the throttling rod in the plunger guide bush; Plunger seal is inserted in the plunger guide bush, and can slide along the tube length degree direction of plunger guide bush, and the bottom of plunger offers the throttle orifice with the intracavity inter-connection of plunger; Throttle orifice is passed on the top of throttling rod, forms throttle chink between throttling rod and the throttle orifice.Offer filler opening on the plunger guide bush.This hydraulic bjuffer in use, fluid gets in the sleeve through filler opening, and gets in the plunger through throttle chink.Be compressed at plunger, when moving down, the fluid in the sleeve can be spurted in the plunger through throttle chink, though realized the buffering to plunger, is easy to generate oil gas and mixes, and produces instantaneous pressure and impact, causes buffer buffers not steady.

Summary of the invention

The hydraulic bjuffer that the purpose of this invention is to provide a kind of stable buffering.

For achieving the above object; The technological scheme that the present invention adopts is: a kind of hydraulic bjuffer; The hollow plunger that comprises that plunger guide bush, sealing are inserted in the said plunger guide bush and can slide along the tube length degree direction of this plunger guide bush, the bottom that is opened in said plunger and with the throttle orifice of the intracavity inter-connection of said plunger, be arranged on the throttling rod in the said plunger guide bush; The top of said throttling rod is passed said throttle orifice and is got in the said plunger; Form throttle chink between said throttling rod and the said throttle orifice; Said hydraulic bjuffer comprises that also sealing is arranged on the discoid pieces on the top that said throttling rod is positioned at said plunger, and the shaft axis of said discoid pieces and the shaft axis of said throttling rod coincide, and be gapped between the outward edge of said discoid pieces and the inwall of said plunger; The width in said gap is greater than the width of said throttle chink; The width in said gap is 0.2-5mm, said discoid pieces with the bottom facing surfaces of said plunger on offer a plurality ofly along the spaced groove of the circumferential direction of this discoid pieces, said groove radially extends along it from the outward edge of said discoid pieces inwards; Said discoid pieces has first working position and second working position; When said discoid pieces is in first working position, the pig of said discoid pieces and said plunger, the groove on the said discoid pieces is communicated with said gap and said throttle chink; When said discoid pieces is in second working position, form the space that is connected with said throttle chink between the bottom of said discoid pieces and said plunger, this space is positioned at the intracavity inter-connection above the said discoid pieces through said gap and said plunger.

As a kind of concrete mode of execution; The center of said discoid pieces offers mounting hole; The top of said throttling rod is provided with outside thread, and said mounting hole is passed on the top of said throttling rod, is combined with nut; Said nut is tightened on the top of said throttling rod, and seal ring is pressed on the limit, hole of mounting hole of said discoid pieces.

Because the utilization of technique scheme, the present invention compared with prior art has advantage: this hydraulic bjuffer in use, oil-feed in the inner chamber of sleeve; In the inner chamber of fluid through throttle chink and groove and gap entering plunger, in original state, discoid pieces is in first working position; The pig of discoid pieces and plunger is compressed at plunger, when moving down; Fluid can spray by the lower surface to discoid pieces from throttle chink, forms the space between the bottom of plunger and the discoid pieces, and this moment, discoid pieces was in second working position; Because the effect of throttling, the space forms negative pressure, then on the one hand; The fluid that plunger is arranged in the inner chamber of discoid pieces top can flow to the space through the gap, from throttle chink, ejects fluid on the other hand through the transition in the space, impacts on the lower surface of discoid pieces; This moment, fluid still had certain speed, and then fluid can flow to the inner chamber that plunger is arranged in the discoid pieces top from the gap, and the fluid that flows to the space with the inner chamber that is arranged in the discoid pieces top from plunger through the gap forms convection current; The speed that causes flowing to the fluid in the inner chamber of discoid pieces top reduces greatly; Avoid fluid to be ejected in the inner chamber of discoid pieces top, weaken the degree that oil gas mixes, make buffer buffers more steady.

Description of drawings

Accompanying drawing 1 is looked schematic representation for master of the present invention;

Accompanying drawing 2 is looked cross-sectional schematic for the part master that plunger guide bush, plunger, throttling rod among the present invention are connected, and this moment, plunger was in original state, and discoid pieces is in first working position;

Accompanying drawing 3 is looked cross-sectional schematic for the part master that plunger guide bush, plunger, throttling rod among the present invention are connected, and this moment, plunger was compressed, and discoid pieces is in second working position;

Accompanying drawing 4 is the elevational schematic view of discoid pieces among the present invention;

Accompanying drawing 5 is the sectional view of accompanying drawing 4 along the A-A direction.

Embodiment

Come further to set forth structure of the present invention below in conjunction with accompanying drawing.

Shown in Fig. 1-5; A kind of hydraulic bjuffer, comprise base 14, vertically be arranged on plunger guide bush 1 on the base 14, vertically be arranged on the base 14 and be arranged in throttling rod 3, the plunger 2 of hollow, the discoid pieces 4 of plunger guide bush 1, plunger 2 sealings of hollow are inserted in the plunger guide bush 1; And can slide up and down along the tube length degree direction of plunger guide bush 1; The bottom of plunger 2 offers the throttle orifice that is connected with the inner chamber 5 of plunger 2, and the top of throttling rod 3 is passed throttle orifice and got in the plunger 2, forms throttle chink 11 between throttling rod 3 and the throttle orifice; Be positioned at throttling rod 3 that sealing is provided with discoid pieces 4 on the top of plunger 2; The shaft axis of the shaft axis of discoid pieces 4 and throttling rod 3 coincides, and promptly all vertically is provided with, between the inwall of the outward edge of discoid pieces 4 and plunger 2 gapped 10; The width in this gap 10 can be 0.2-5mm greater than the width of throttle chink 11.Discoid pieces 4 with the bottom facing surfaces of plunger 2 on offer a plurality of along the spaced groove 13 of the circumferential direction of this discoid pieces 4; Groove 13 radially extends along it from the outward edge of discoid pieces 4 inwards; Can extend to throttle chink 11 directly over the position; Therefore the outer end of groove 13 can communicate with gap 10, and the inner can communicate with throttle chink 11.This hydraulic bjuffer in use, oil-feed in the inner chamber 7 of sleeve 1, fluid gets in the inner chamber 5 of plungers 2 through throttle chink 11 and groove 13 and gap 10; In original state, the liquid level of fluid is near the top of discoid pieces 4, the pig of discoid pieces 4 and plunger 2; As shown in Figure 2, compress at plunger 2, when moving down; Fluid can spray by the lower surface to discoid pieces 4 from throttle chink 11, forms space 6 between the bottom of plunger 2 and the discoid pieces 4, and is as shown in Figure 3; Because the effect of throttling, space 6 forms negative pressure, then on the one hand; Plunger 2 is arranged in the fluid of the inner chamber 5 of discoid pieces 4 tops and can be through the gap 10 flows to space 6, from throttle chink 11, ejects fluid on the other hand through 6 the transition in the space, impacts on the lower surface of discoid pieces 4; This moment, fluid still had certain speed, and then fluid can be from the gap 10 flows to the inner chamber 5 that plunger 2 is arranged in discoid pieces 4 tops, with the inner chamber 5 that is arranged in discoid pieces 4 tops from plunger 2 through the gap 10 flow to space 6 fluid form convection current; The speed that causes flowing to the fluid in the inner chamber 5 of discoid pieces 4 tops reduces greatly, avoids fluid to be ejected in the inner chamber 5 of discoid pieces 4 tops, weakens the degree that oil gas mixes; Discoid pieces 4 is set, make the fluid that sprays in the throttle chink 11 can be in the space 6 transition, and between discoid pieces 4 and plunger 2, form the gap; Realize the convection current of fluid, made buffer buffers more steady.Offer a plurality of grooves 3 on the lower surface of discoid pieces 4, shown in Figure 4 and 5, when hydraulic bjuffer is in original state; The pig of discoid pieces 4 and plunger 2, the outer end of groove 13 communicates with gap 10, and the inner communicates with throttle chink 11; Then in the moment that compression takes place plunger 2, fluid flows to gap 10 through groove 13 from throttle chink 11 ejections; Realize the buffering of plunger 2 smoothly; Make things convenient for the formation in the space 6 between discoid pieces 4 and the plunger 2, thereby be convenient to the transition and the convection current of fluid, make buffer buffers steady.

Discoid pieces 4 sealings are arranged on the top of throttling rod 3, and discoid pieces 4 is in the form of annular discs, and the center of discoid pieces 4 offers mounting hole 12; The top of throttling rod 3 is provided with outside thread, and mounting hole 12 is passed on the top of throttling rod 3, is combined with nut 8; Nut 8 is tightened on the top of throttling rod 3, and seal ring 9 is pressed on the limit, hole of mounting hole 12 of discoid pieces 4, realizes being sealed and matched of discoid pieces 4 and throttling rod 3; It is simple in structure, easy for installation that sealing cooperates.

Claims

1. hydraulic bjuffer; The hollow plunger that comprises that plunger guide bush, sealing are inserted in the said plunger guide bush and can slide along the tube length degree direction of this plunger guide bush, the bottom that is opened in said plunger and with the throttle orifice of the intracavity inter-connection of said plunger, be arranged on the throttling rod in the said plunger guide bush; The top of said throttling rod is passed said throttle orifice and is got in the said plunger; Form throttle chink between said throttling rod and the said throttle orifice; It is characterized in that: said hydraulic bjuffer comprises that also sealing is arranged on the discoid pieces on the top that said throttling rod is positioned at said plunger, and the shaft axis of said discoid pieces and the shaft axis of said throttling rod coincide, and be gapped between the outward edge of said discoid pieces and the inwall of said plunger; The width in said gap is greater than the width of said throttle chink; The width in said gap is 0.2-5mm, said discoid pieces with the bottom facing surfaces of said plunger on offer a plurality ofly along the spaced groove of the circumferential direction of this discoid pieces, said groove radially extends along it from the outward edge of said discoid pieces inwards; Said discoid pieces has first working position and second working position; When said discoid pieces is in first working position, the pig of said discoid pieces and said plunger, the groove on the said discoid pieces is communicated with said gap and said throttle chink; When said discoid pieces is in second working position, form the space that is connected with said throttle chink between the bottom of said discoid pieces and said plunger, this space is positioned at the intracavity inter-connection above the said discoid pieces through said gap and said plunger.

2. hydraulic bjuffer according to claim 1; It is characterized in that: the center of said discoid pieces offers mounting hole; The top of said throttling rod is provided with outside thread, and said mounting hole is passed on the top of said throttling rod, is combined with nut; Said nut is tightened on the top of said throttling rod, and seal ring is pressed on the limit, hole of mounting hole of said discoid pieces.