CN203822741U - Sealing structure of pumping cylinder rod - Google Patents

Sealing structure of pumping cylinder rod Download PDF

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Publication number
CN203822741U
CN203822741U CN201420120675.5U CN201420120675U CN203822741U CN 203822741 U CN203822741 U CN 203822741U CN 201420120675 U CN201420120675 U CN 201420120675U CN 203822741 U CN203822741 U CN 203822741U
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CN
China
Prior art keywords
ring
rod
seal
sealing
guide sleeve
Prior art date
Application number
CN201420120675.5U
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Chinese (zh)
Inventor
文彬
Original Assignee
湖南协力液压有限公司
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Priority to CN201420120675.5U priority Critical patent/CN203822741U/en
Application granted granted Critical
Publication of CN203822741U publication Critical patent/CN203822741U/en

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Abstract

The utility model discloses a sealing structure of a pumping cylinder rod. The sealing structure comprises a cylinder body, a piston rod and a rod cavity, wherein one end of the cylinder body is connected with a guiding sleeve which is sheathed outside the piston rod; along the direction from one end of the guiding sleeve close to the rod cavity to the other end of the guiding sleeve, a step seal, a U-shaped sealing ring, a BA sealing ring and a dust-proof ring; a first guide ring is arranged between the step seal and the U-shaped sealing ring; a second guide ring is arranged between the U-shaped sealing ring and the BA sealing ring; a ring groove is arranged between the U-shaped sealing ring and the second guide ring; a one-way valve is connected at the ring groove; the ring groove is communicated with an inlet of the one-way valve; an outlet of the one-way valve is communicated with the rod cavity. The sealing structure provided by the utility model has the advantages that pocketed oil between sealing pieces can be conveniently discharged in time, and the influence on the sealing effect due to over-high pressure of the pocketed oil can be avoided.

Description

A kind of pumping oil cylinder rod seal structure

Technical field

The utility model relates to a kind of sealing configuration, is specifically related to a kind of main oil cylinder piston rod seal structure of pumping oil cylinder rod seal structure, particularly concrete pump.

Background technique

Concrete pump as can high efficiency, long distance, carry continuously the construction implement of pumpable concrete, be the main force of current international project construction industry, in world urbanization, modern process, take on construction important task.And in concrete pump structure, as the pumping master cylinder of one of executive component that is efficiency of construction by the Conversion of Energy of equipment, the reliability of its work directly affects Economy and the working efficiency of equipment, because pumping master cylinder is to do straight reciprocating motion at work, and working pressure is high, speed is fast, requirement leakage rate is few, so one of problem that when reasonably sealing configuration is the design of pumping master cylinder, emphasis is considered.

The sealing of master cylinder can be divided into piston seal and rod seal, and rod seal is called for short rod seal.Piston seal refers to the sealing between cylinder body and piston, seals the bad performance that can affect oil cylinder; And rod seal refers to the sealing between piston rod and cylinder cap, sealing effect is bad can produce the phenomenon of leakage of oil.In prior art, mainly adopt piston rod seal.

In cylinder rod sealing configuration, between two Sealings, easily form pocketed oil, in prior art, the pocketed oil producing is directly taken oil cylinder out of with piston rod, easily cause the contaminated aqueous solution in the washing chamber of piston rod one end, and pocketed oil can not discharge smoothly, the pocketed oil producing between Sealing is along with the rising of pressure, easily destroy the sealing effect of Sealing, and then affect the normal operation of concrete pump.

Model utility content

The purpose of this utility model is to overcome above shortcoming, provides a kind of and can easily and timely discharge the pocketed oil between Sealing, avoids pocketed oil overpressure to affect sealing effect; Meanwhile, the discharge of pocketed oil can not polluted the solution in washing chamber, and also environment does not produce pollution to external world.

The technical solution of the utility model is:

A kind of pumping oil cylinder rod seal structure, comprise cylinder body, piston rod and rod chamber, one end of described cylinder body is connected with guide sleeve, described guide sleeve is set in outside described piston rod, lean on rod chamber one end to the direction of the described guide sleeve the other end along described guide sleeve, between described guide sleeve and described piston rod, be disposed with this special envelope, U-shaped seal ring, BA seal ring and dust ring, between described this special envelope and described U-shaped seal ring, be provided with the first guide ring, between described U-shaped seal ring and described BA seal ring, be provided with the second guide ring, between described U-shaped seal ring and the second guide ring, be provided with an annular groove, described annular groove place connects an one-way valve, described annular groove is communicated with the import of described one-way valve, the outlet of described one-way valve is communicated with described rod chamber.

Further, between described guide sleeve and described piston rod, be also provided with and receive dirty ring, the described dirt ring of receiving is arranged on described this special envelope between described guide sleeve end face, and described end face is the end face that described guide sleeve leans on rod chamber one end, and the end face of described guide sleeve is also provided with a scrap slot.

Further, described in, receive and be provided with the 3rd guide ring between dirty ring and described this special envelope.

Further, the seal lip of described this special envelope, U-shaped seal ring and BA seal ring arranges towards described rod chamber one end respectively, and the seal lip of described dust ring arranges towards the exterior edge face of described guide sleeve.

The pumping oil cylinder rod seal structure that the utility model provides, tool has the following advantages:

1, the pumping oil cylinder rod seal structure that the utility model provides, can easily and timely discharge the pocketed oil between Sealing, avoids pocketed oil overpressure to affect sealing effect.The pumping oil cylinder rod seal structure that the utility model provides, comprise cylinder body, piston rod and rod chamber, one end of described cylinder body is connected with guide sleeve, described guide sleeve is set in outside described piston rod, lean on rod chamber one end to the direction of the described guide sleeve the other end along described guide sleeve, between described guide sleeve and described piston rod, be disposed with this special envelope, U-shaped seal ring, BA seal ring and dust ring, between described this special envelope and described U-shaped seal ring, be provided with the first guide ring, between described U-shaped seal ring and described BA seal ring, be provided with the second guide ring, between described U-shaped seal ring and the second guide ring, be provided with an annular groove, described annular groove place connects an one-way valve, described annular groove is communicated with the import of described one-way valve, the outlet of described one-way valve is communicated with described rod chamber.In this structure, Si Te envelope is used for alleviating most of oil hydraulic coupling, U-shaped seal ring plays primary seal effect, by annular groove being set in sealing structure, annular groove is communicated with an one-way valve, along with the rapid movement of piston rod, there is a small amount of oil film to move to U-shaped seal ring with piston rod surface, and BA RunddichtringO by unnecessary oil film seal in annular groove, under the reciprocating state of high speed of piston rod, in annular groove, the oil film of accumulation is more and more, when forming the pressure of pocketed oil in annular groove when more and more higher, pocketed oil under high pressure backs down one-way valve, be recycled to rod chamber from the outlet of one-way valve.By annular groove and one-way valve, make the pocketed oil forming between Sealing drain into easily in time rod chamber, thereby avoided pocketed oil overpressure and affected the situation of sealing effect, the working life of having improved Sealing.

2, the pumping oil cylinder rod seal structure that the utility model provides can not pollute the solution in washing chamber when pocketed oil is discharged, and also environment does not produce pollution to external world.The pumping oil cylinder rod seal structure that the utility model provides, the outlet of one-way valve is directly communicated with rod chamber, and pocketed oil does not directly drain into the washing chamber of piston rod one end, thereby can not pollute the solution in washing chamber; Meanwhile, in this structure, pocketed oil also can directly externally not discharge, thus environment to external world not.In sealing structure, pocketed oil drains into rod chamber, simple in structure, and pocketed oil discharge is convenient, meanwhile, the unlatching of one-way valve realizes according to pocketed oil pressure, and the precision of unlatching is high, and the import and export connectivity of one-way valve is good, can in oil extraction process, not produce the phenomenon of leakage of oil, pocketed oil discharge is completely.

3, the pumping oil cylinder rod seal structure that the utility model provides, can avoid particulate matter to enter Sealing, thus the sealing effect of the sealing configuration further improving.The pumping oil cylinder rod seal structure that the utility model provides, between guide sleeve and piston rod, be also provided with and receive dirty ring, this is received dirty ring and is arranged between this special envelope and guide sleeve end face, and this end face is the end face that guide sleeve leans on rod chamber one end, and the end face of guide sleeve is also provided with a scrap slot.Wherein, the dirty ring of receiving has the effect of interception dirt particle, and the particulate matter bringing with piston rod high-speed motion is blocked in scrap slot, prevents that dirt particle from entering in sealing configuration, thereby affects sealing effect.

Brief description of the drawings

In order to be illustrated more clearly in the utility model embodiment's technological scheme, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic diagram of pumping oil cylinder rod seal structure of the present utility model;

Fig. 2 is the A portion enlarged view in Fig. 1;

Reference character: 1-cylinder body, 2-piston rod, 3-rod chamber, 4-guide sleeve, the special envelope of 5-Si, 6-U RunddichtringO, 7-BA seal ring, 8-dust ring, 9-the first guide ring, 10-the second guide ring, 11-annular groove, 12-one-way valve, the import of 13-one-way valve, the outlet of 14-one-way valve, 15-receives dirty ring, 16-scrap slot, 17-the 3rd guide ring.

Embodiment

To the technological scheme in the utility model embodiment be clearly and completely described below, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.

In conjunction with Fig. 1, Fig. 2, a kind of pumping oil cylinder rod seal structure, comprise cylinder body 1, piston rod 2 and rod chamber 3, one end of cylinder body 1 is connected with guide sleeve 4, guide sleeve 4 is set in outside piston rod 2, lean on rod chamber one end to the direction of the guide sleeve the other end along guide sleeve 4, between guide sleeve 4 and piston rod 2, be disposed with this special envelope 5, U-shaped seal ring 6, BA seal ring 7 and dust ring 8, between Si Te envelope 5 and U-shaped seal ring 6, be provided with the first guide ring 9, between U-shaped seal ring 6 and BA seal ring 7, be provided with the second guide ring 10, between U-shaped seal ring 6 and the second guide ring 10, be provided with an annular groove 11, annular groove 11 places connect an one-way valve 12, annular groove 11 is communicated with the import 13 of one-way valve, the outlet 14 of one-way valve is communicated with rod chamber 3.

In the sealing configuration that the utility model provides, Si Te envelope is used for alleviating most of oil hydraulic coupling, U-shaped seal ring plays primary seal effect, by annular groove being set in sealing structure, annular groove is communicated with an one-way valve, along with the rapid movement of piston rod, there is a small amount of oil film to move to U-shaped seal ring with piston rod surface, and BA RunddichtringO by unnecessary oil film seal in annular groove, under the reciprocating state of high speed of piston rod, in annular groove, the oil film of accumulation is more and more, when forming the pressure of pocketed oil in annular groove when more and more higher, pocketed oil under high pressure backs down one-way valve, be recycled to rod chamber from the outlet of one-way valve.By annular groove and one-way valve, make the pocketed oil forming between Sealing drain into easily in time rod chamber, thereby avoided pocketed oil overpressure and affected the situation of sealing effect, the working life of having improved Sealing.

The pumping oil cylinder rod seal structure that the utility model provides, the outlet of one-way valve is directly communicated with rod chamber, and pocketed oil does not directly drain into the washing chamber of piston rod one end, thereby can not pollute the solution in washing chamber; Meanwhile, in this structure, pocketed oil also can directly externally not discharge, thus environment to external world not.In sealing structure, pocketed oil drains into rod chamber, simple in structure, and pocketed oil discharge is convenient, meanwhile, the unlatching of one-way valve realizes according to pocketed oil pressure, and the precision of unlatching is high, and the import and export connectivity of one-way valve is good, can in oil extraction process, not produce the phenomenon of leakage of oil, pocketed oil discharge is completely.

According to above-mentioned principle, the outlet of one-way valve can be also extraneous fuel tank or rodless cavity separator tube, and the outlet of one-way valve is communicated with extraneous fuel tank or rodless cavity separator tube.The Placement that pocketed oil is drained into outside system can be: a hole is set on cylinder body, and the silk one end in hole and the outlet of one-way valve are connected, and the other end in silk hole is communicated with extraneous fuel tank or rodless cavity separator tube.Enter extraneous fuel tank or rodless cavity separator tube by one-way valve, oil leakage phenomenon equally can not occur yet.

In the utility model, be also provided with and receive dirty ring 15 between guide sleeve 4 and piston rod 2, the dirty ring 15 of receiving is arranged between this special envelope 5 and guide sleeve 4 end faces, and this end face is the end face that guide sleeve leans on rod chamber one end, and the end face of guide sleeve 4 is also provided with a scrap slot 16.Wherein, the dirty ring 15 of receiving has the effect of interception dirt particle, and the particulate matter bringing with piston rod 2 high-speed motions is blocked in scrap slot 16, prevents that dirt particle from entering in sealing configuration, thereby affects sealing effect.Receive dirty ring 15 and scrap slot 16 and further improved the sealing effect of Sealing.

In the utility model, receive and be provided with the 3rd guide ring 17 between dirty ring 15 and this special envelope 5, further optimize the structure of Sealing, improve sealing effect.

In the utility model, the seal lip of Si Te envelope 5, U-shaped seal ring 6 and BA seal ring 7 arranges towards rod chamber 3 one end respectively, the seal lip of dust ring 4 arranges towards the exterior edge face of guide sleeve, and this exterior edge face refers to end face contrary with close rod chamber one end on guide sleeve.By mounting point and the direction of the each seal ring of reasonable Arrangement, can prevent pocketed oil outflow, prevent that external dust from entering Sealing and affecting sealing effect simultaneously.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any amendments of doing, be equal to replacement etc., within all should being included in protection domain of the present utility model in protection domain of the present utility model.

Claims (4)

1. a pumping oil cylinder rod seal structure, comprise cylinder body, piston rod and rod chamber, it is characterized in that, one end of described cylinder body is connected with guide sleeve, described guide sleeve is set in outside described piston rod, lean on rod chamber one end to the direction of the described guide sleeve the other end along described guide sleeve, between described guide sleeve and described piston rod, be disposed with this special envelope, U-shaped seal ring, BA seal ring and dust ring, between described this special envelope and described U-shaped seal ring, be provided with the first guide ring, between described U-shaped seal ring and described BA seal ring, be provided with the second guide ring, between described U-shaped seal ring and the second guide ring, be provided with an annular groove, described annular groove place connects an one-way valve, described annular groove is communicated with the import of described one-way valve, the outlet of described one-way valve is communicated with described rod chamber.
2. pumping oil cylinder rod seal structure according to claim 1, it is characterized in that, between described guide sleeve and described piston rod, be also provided with and receive dirty ring, the described dirt ring of receiving is arranged on described this special envelope between described guide sleeve end face, described end face is the end face of described guide sleeve by rod chamber one end, and the end face of described guide sleeve is also provided with a scrap slot.
3. pumping oil cylinder rod seal structure according to claim 2, is characterized in that, described in receive and be provided with the 3rd guide ring between dirty ring and described this special envelope.
4. according to the pumping oil cylinder rod seal structure described in any one in claims 1 to 3, it is characterized in that, the seal lip of described this special envelope, U-shaped seal ring and BA seal ring arranges towards described rod chamber one end respectively, and the seal lip of described dust ring arranges towards the exterior edge face of described guide sleeve.
CN201420120675.5U 2014-03-12 2014-03-12 Sealing structure of pumping cylinder rod CN203822741U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420120675.5U CN203822741U (en) 2014-03-12 2014-03-12 Sealing structure of pumping cylinder rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420120675.5U CN203822741U (en) 2014-03-12 2014-03-12 Sealing structure of pumping cylinder rod

Publications (1)

Publication Number Publication Date
CN203822741U true CN203822741U (en) 2014-09-10

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Application Number Title Priority Date Filing Date
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Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912870A (en) * 2014-03-11 2015-09-16 湖南协力液压有限公司 Sealing structure for pumping oil cylinder rod
CN105889474A (en) * 2014-12-29 2016-08-24 欧阳抗美 Sliding bearing used for automobile automatic transmission clutch
CN110273889A (en) * 2019-07-08 2019-09-24 江苏恒立液压股份有限公司 Empty van vehicle elevating ram

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912870A (en) * 2014-03-11 2015-09-16 湖南协力液压有限公司 Sealing structure for pumping oil cylinder rod
CN105889474A (en) * 2014-12-29 2016-08-24 欧阳抗美 Sliding bearing used for automobile automatic transmission clutch
CN110273889A (en) * 2019-07-08 2019-09-24 江苏恒立液压股份有限公司 Empty van vehicle elevating ram

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