CN202542772U - Novel jack - Google Patents

Novel jack Download PDF

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Publication number
CN202542772U
CN202542772U CN2012202034225U CN201220203422U CN202542772U CN 202542772 U CN202542772 U CN 202542772U CN 2012202034225 U CN2012202034225 U CN 2012202034225U CN 201220203422 U CN201220203422 U CN 201220203422U CN 202542772 U CN202542772 U CN 202542772U
Authority
CN
China
Prior art keywords
seal ring
sealing
jack
cylinder
shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012202034225U
Other languages
Chinese (zh)
Inventor
周承惠
周磊
张相安
张相新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING NIUXI HYDRAULIC TECHNOLOGY INSTITUTE
Original Assignee
BEIJING NIUXI HYDRAULIC TECHNOLOGY INSTITUTE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEIJING NIUXI HYDRAULIC TECHNOLOGY INSTITUTE filed Critical BEIJING NIUXI HYDRAULIC TECHNOLOGY INSTITUTE
Priority to CN2012202034225U priority Critical patent/CN202542772U/en
Application granted granted Critical
Publication of CN202542772U publication Critical patent/CN202542772U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a novel jack. The seal between a piston cylinder and an internal cylinder sleeve is realized through the adoption of a compound sealing system composed of an n-shaped seal ring and a combined seal element. In the working course of the jack, the n-shaped seal ring is extruded to expand outwards by means of a working medium pressure from an inner cavity of the n-shaped seal ring so as to realize seal; the higher the pressure is, the better the sealing effect is; the medium leakage rate is greatly reduced; a better sealing effect is obtained; and the service life is prolonged. Because the sealing mechanism of the n-shaped seal ring is the self-dynamic balance of the working medium pressure, the processing precision of a host does not need to be improved with the adoption of the n-shaped seal ring, and no any impact is caused to the working condition of the combined seal element in the compound sealing system, so that the novel jack disclosed by the utility model has double sealing effects on the n-shaped seal ring and the combined seal element. Compared with a hydraulic jack in the prior art, the novel jack disclosed by the utility model has the superior characteristics of low medium leakage rate, good sealing effect, long service life, reliable and stable working condition and the like.

Description

A kind of novel jack
Technical field
The utility model relates to a kind of Hydraulic for lifting load machinery, and specifically a kind of novel jack belongs to mechanical equipment manufacturing technology field.
Background technology
As everyone knows, existing hydraulic jack, the dynamic seal between its piston cylinder and the cylinder sleeve adopts O shape circle, Yx shape circle and combined sealing component packing technique to solve the dielectric leakage problem for a long time.In rubber seal packing techniquies such as O shape circle, Yx shape circle, in hydraulic jack when work,, working medium pressure is to make it be adjacent to cylinder sleeve and piston cylinder and realize leak free from seal ring external compression sealing circle body; Packing element with the relative motion of cylinder sleeve in be easy to be damaged, thereby dielectric leakage takes place. because the elastomeric material yield rate is low, if working medium pressure is too high; Packing element then can produce distortion; Medium passes through and mistake, and seal failure causes the work life of hydraulic jack short.Adopt O shape circle and Yx shape circle in traditional elastomeric material packing technique, the pipe pressure height does not all need a rigid material ring set strut member, makes existing hydraulic jack job insecurity.The combined sealing component that development in recent years is got up comes down to O shape circle and the Yx shape RunddichtringO with the alienation of rigid material ring set strut member; Its sealing mechanism is all the same basically with Yx shape circle elastomeric material sealing member packing technique with O shape circle; Sealing effectiveness is not very good yet; Exist the dielectric leakage problem always, can not anti-very high pressure.Instability because of the generation of rigid material ring set strut member can appear in existing hydraulic jack on period equally.Particularly when using two above combined sealing components simultaneously, be actually the quantity that has increased rigid material ring set strut member, more increased the manufacturing difficulty of processing of main frame, require working accuracy high, cause the hydraulic jack cost significantly to rise.Existing hydraulic jack is prone to produce dielectric leakage, reliability, stable low, and work life is short.
The utility model content
The purpose of the utility model will provide exactly that a kind of dielectric leakage is low, reliability, stability are high, the novel jack of long working life.
The invention thinking of the utility model is:
The compound seal system that the piston cylinder of novel jack and the sealing between the inner cylinder liner adopt n shape seal ring and combined sealing component to form realizes.
The concrete technical scheme of the utility model is:
Constitute the utility model jack by piston cylinder, inner cylinder liner, outer cylinder sheath, n shape seal ring, combined sealing component etc.
Novel jack piston cylinder is provided with at least one n shape seal ring and at least one combined sealing component; Cylinder is provided with access opening in order to being communicated with n shape seal ring mounting groove, and access opening communicates with a plurality of n shape seal ring mounting grooves or an access opening communicates with a n shape seal ring mounting groove.
The driving surface of n shape seal ring both sides inboard and seal ring constitute hollow cavity, and the sealed working face of n shape seal ring is provided with boss.
Novel jack is by only employing n shape seal ring of the sealing between piston cylinder and inner cylinder liner and combined sealing component are formed the compound seal system; Perhaps adopt the multi-form of compound seal system that n shape seal ring and combined sealing component form simultaneously in the sealing between piston cylinder and the inner cylinder liner, between force (forcing) pump cylinder and the force (forcing) pump cylinder sleeve.
Advantage of the utility model and benefit:
Because the compound seal system that the utility model jack has adopted n shape seal ring and combined sealing component to form realizes sealing between piston cylinder and the inner cylinder liner.The utility model hydraulic jack on period; Working medium pressure outwards expands from n shape seal ring inner chamber crush seal circle body and realizes sealing, and pressure high sealing effect more is good more, reduces dielectric leakage greatly; Obtain better sealing effectiveness, further prolonged work life.N shape seal ring sealing mechanism is a working medium pressure oneself kinetic balance; Adopt n shape seal ring need not increase the cylinder working accuracy; Working condition to the combined sealing component in the compound seal system has no influence, so the novel jack of the utility model has the double seal effect of n shape seal ring and combined sealing component.Compare excellent characteristics such as have that dielectric leakage is low, good sealing effect, long working life, working condition are reliable, stable with existing hydraulic jack.
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described further.
Description of drawings:
Fig. 1 is that the only sealing between piston cylinder 3 and inner cylinder liner 2 adopts n shape seal ring 5, access opening 4 and combined sealing component 8 to form the cut-away view of the novel jack of compound seal system;
The cut-away view of the novel jack of the compound seal system that Fig. 2 is between piston cylinder 3 and the inner cylinder liner 2, n shape seal ring 5,8 compositions of access opening 4 and combination sealing unit are adopted in the sealing between force (forcing) pump cylinder 7 and the force (forcing) pump cylinder sleeve 6 simultaneously.
The main cut-away view of Fig. 3 n shape seal ring
The side cut-away view of Fig. 4 n shape seal ring
The specific embodiment:
Shown in Figure 1 is the novel jack that the compound seal system of n shape seal ring 5, access opening 4 and combined sealing component 8 compositions is adopted in the only sealing between piston cylinder 3 and inner cylinder liner 2.
Novel jack piston cylinder 3 is provided with at least one n shape seal ring 5 and at least one combined sealing component 8; There are some access openings 4 to lead to each n shape seal ring 5 mounting groove on piston cylinder 3 end faces; Boot media gets into the inner chamber of n shape seal ring 5, makes in n shape seal ring 5 inner chambers to be full of medium; Access opening 4 communicates with a plurality of n shape seal ring 5 mounting grooves or an access opening 4 communicates with n shape seal ring seal ring 5 mounting grooves.The compound seal system that n shape seal ring 5, access opening 4 and combined sealing component 8 are formed realizes the sealing between piston cylinder 3 and the inner cylinder liner 2.
Fig. 3, Fig. 4 are master, the side cut-away view of n shape seal ring 5, and the driving surface of n shape seal ring 5 both sides inboard and seal ring constitute hollow cavity, on the sealed working face of n shape seal ring 5 boss 9 are arranged, because seal ring 5 cross sectional shapes are like n shape, so be called n shape seal ring.
As can beappreciated from fig. 1, after hydraulic jack was started working, pressure strengthened; Pressure medium reaches the inner chamber of n shape seal ring 5 by medium via access opening 4, makes the driving surface closed contact of n shape seal ring 5 and inner cylinder liner 2, and the driving surface of boss 9 on each road n shape seal ring 5 sealed working face and inner cylinder liner 2 forms labyrinth packing; Medium through the time pressure progressively decay; Less than the pressure medium in the inner chamber of n shape seal ring 5, medium can not take place pass through leakage phenomenon, and pressure medium is big more; The driving surface of n shape seal ring 5 and inner cylinder liner 2 is fitted tight more, and sealing effectiveness is fine.In the forced stroke, since n shape seal ring 5 inner chamber hollows, wearing and tearing and little in the forced stroke; And in the inoperative stroke, it is slight to rub between n shape seal ring 5 sealing circle bodies and the inner cylinder liner 2, and it is very little to wear and tear.Simultaneously, pressure medium is to push n shape seal ring 5 sealing circle bodies internally to realize leak free, and whole rubber seal is evenly stressed under the extruding of pressure medium, and deformation is very little, can not produce deformation set, and n shape seal ring 5 work lifes have obtained prolongation.Because sealing force directly comes from working medium pressure in n shape seal ring 5 inner chambers; So the working medium pressure in n shape seal ring 5 inner chambers is in self-kinetic balance at any time during host work; Do not influence the working condition of combined sealing component 8 in the compound seal system, realized double seal.The novel jack of the utility model not only work life is multiplied, and dielectric leakage is low, and reliable operation, stable.
The novel jack that adopts the compound seal system that n shape seal ring 5, access opening 4 and combined sealing component 8 form for the sealing between piston cylinder 3 and the inner cylinder liner 2, between force (forcing) pump cylinder 7 and the force (forcing) pump cylinder sleeve 6 simultaneously shown in Figure 2; Novel jack piston cylinder 3, force (forcing) pump cylinder 7 are provided with at least one n shape seal ring 5 and at least one combined sealing component 8; There are some access openings 4 to lead to each n shape seal ring 5 mounting groove on piston cylinder 3, force (forcing) pump cylinder 7 end faces; Boot media gets into the inner chamber of n shape seal ring 5, makes in n shape seal ring 5 inner chambers to be full of medium; Access opening 4 communicates with a plurality of n shape seal ring 5 mounting grooves or an access opening 4 communicates with n shape seal ring seal ring 5 mounting grooves.The compound seal system that n shape seal ring 5, access opening 4 and combined sealing component 8 are formed realizes the sealing between piston cylinder 3 and inner cylinder liner 2, force (forcing) pump cylinder 7 and the force (forcing) pump cylinder sleeve 6.It is basic identical that its service condition and front are narrated.
Application in the industry
Because the compound seal system that the novel jack of the utility model has adopted n shape seal ring 5, access opening 4 and combined sealing component 8 to form has realized double seal, reduces dielectric leakage greatly, obtains good sealing effectiveness.The novel jack of the utility model is compared with existing hydraulic jack, has excellent characteristics such as dielectric leakage is low, good sealing effect, long working life, reliable operation, good stability.

Claims (3)

1. novel jack; By piston cylinder (3), inner cylinder liner (2), outer cylinder sheath (1), n shape seal ring (5), combined sealing component formations such as (8), it is characterized in that: the compound seal system that the piston cylinder (3) of novel jack and the sealing between the inner cylinder liner (2) adopt n shape seal ring (5), access opening (4) and combined sealing component (8) to form realizes.
2. novel jack according to claim 1; It is characterized in that: jack piston cylinder (3) is provided with at least one n shape seal ring (5) and at least one combined sealing component (8), and piston cylinder (3) is provided with access opening (4) in order to be communicated with n shape seal ring (5) mounting groove.
3. novel jack according to claim 1 is characterized in that: the compound seal system that novel jack has the only sealing between piston cylinder (3) and inner cylinder liner (2) to adopt n shape seal ring (5), access opening (4) and combined sealing component (8) to form; Perhaps adopt the multi-form of compound seal system that n shape seal ring (5), access opening (4) and combined sealing component (8) form simultaneously in the sealing between piston cylinder (3) and the inner cylinder liner (2), between force (forcing) pump cylinder (7) and the force (forcing) pump cylinder sleeve (6).
CN2012202034225U 2012-05-07 2012-05-07 Novel jack Expired - Fee Related CN202542772U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012202034225U CN202542772U (en) 2012-05-07 2012-05-07 Novel jack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012202034225U CN202542772U (en) 2012-05-07 2012-05-07 Novel jack

Publications (1)

Publication Number Publication Date
CN202542772U true CN202542772U (en) 2012-11-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012202034225U Expired - Fee Related CN202542772U (en) 2012-05-07 2012-05-07 Novel jack

Country Status (1)

Country Link
CN (1) CN202542772U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103387192A (en) * 2012-05-07 2013-11-13 北京纽希液压技术研究所 Novel jack

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103387192A (en) * 2012-05-07 2013-11-13 北京纽希液压技术研究所 Novel jack

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Legal Events

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121121

Termination date: 20150507

EXPY Termination of patent right or utility model