CN107542722A - A kind of high temperature high voltage resistant movable sealing structure - Google Patents
A kind of high temperature high voltage resistant movable sealing structure Download PDFInfo
- Publication number
- CN107542722A CN107542722A CN201710614577.5A CN201710614577A CN107542722A CN 107542722 A CN107542722 A CN 107542722A CN 201710614577 A CN201710614577 A CN 201710614577A CN 107542722 A CN107542722 A CN 107542722A
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- CN
- China
- Prior art keywords
- piston rod
- guide sleeve
- ring seal
- sealing structure
- high voltage
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- 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.)
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Abstract
The invention discloses a kind of high temperature high voltage resistant movable sealing structure, piston rod including piston rod cylinder body and positioned at the piston rod cylinder interior, the upper cover of piston rod is connected to guide sleeve, the guide sleeve rear end is socketed with pressure cap, the pressure cap is threadedly coupled with the piston rod cylinder body, the position with the plunger rod contacts is provided with dust ring and wear-resistant strip inside the guide sleeve, described guide sleeve front end is provided with O-ring seal, the O-ring seal rear end is provided with plain washer, triangular washer is provided between the plain washer and the guide sleeve, O-ring seal front end inner edge is provided with interior lip, outer lip is provided with outside the O-ring seal front end, the O-ring seal, expansion loop is provided with the outside of plain washer and triangular washer.The present invention ensure that the sealing effectiveness of piston rod by expanding with heat and contract with cold for expansion loop when temperature raises, have the advantages that simple in construction, good sealing effect, using effect are good by setting swelling ring structure.
Description
Technical field
The present invention relates to middle pressure intelligent switching control equipment technical field, specially a kind of high temperature high voltage resistant dynamic sealing knot
Structure.
Background technology
Hydraulic pump is the dynamical element of hydraulic system, is to be driven by engine or motor, oil is sucked from hydraulic oil container
Liquid, pressure oil discharge is formed, be sent to a kind of element of executive component.Hydraulic pump is divided into gear pump, plunger pump, vane pump by structure
And screw pump.The basic training of hydraulic sealing structure is with being that prevention or limitation liquid are sewed.Existing movable sealing structure, such as piston
Sealing structure, the pressure for generally sealing liquid are no more than 30MPa, and temperature is no more than 80 °C, and therefore, ring structure typically uses
Molded sealing ring, in cold isostatic press with applying mechanically booster plunger sealing structure, seal pressure can reach 200MPa, but close
Seal medium temperature and be no more than 80 °C.Meanwhile sealing structure is complex, maintainability is poor, and manufacturing cost is high.High pressure sealing pattern
It generally can be divided into three major types：(1) forced seal, it is generally used for static seal；(2) semi-automatic seal, this structure is also by from closely
The continuous development of envelope is substituted；(3) self-tightening sealing, such as the sealing of "○" type circle, the sealing of " B " type ring, delta gasket closure, combination sealing
Deng.After pressure rise, due to the design feature of self-tightening sealing, make the contact force of potted component and super-pressure cylinder bigger,
Sealing is more effective.Pressure is higher, and sealing effectiveness is better.
The physicochemical property of some sealing rings declines under the higher environment of temperature, is so unfavorable for the sealing effect of device
Fruit.
The content of the invention
It is an object of the invention to provide a kind of high temperature high voltage resistant movable sealing structure, to solve to propose in above-mentioned background technology
The problem of.
To achieve the above object, the present invention provides following technical scheme：A kind of high temperature high voltage resistant movable sealing structure, including work
Stopper rod cylinder body and the piston rod positioned at the piston rod cylinder interior, the upper cover of piston rod are connected to guide sleeve, the guide sleeve
Rear end is socketed with pressure cap, and the pressure cap is threadedly coupled with the piston rod cylinder body, inside the guide sleeve with the piston rod
The position of contact is provided with dust ring and wear-resistant strip, and described guide sleeve front end is provided with O-ring seal, the O-ring seal
Rear end is provided with plain washer, is provided with triangular washer between the plain washer and the guide sleeve, in the O-ring seal front end
While being provided with interior lip, outer lip, the O-ring seal, plain washer and delta-ring are provided with outside the O-ring seal front end
Expansion loop is provided with the outside of circle.
Preferably, the expansion loop is cirque structure, and the expansion loop is made of metallic copper.
Preferably, added with one or both of carbon, graphite in the polytetrafluoroethylmaterial material of described O-ring seal.
Preferably, the inner wall thickness of the expansion loop is 2~3mm.
Preferably, the internal diameter of the guide sleeve is equal to the outer diameter of piston rod.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention, piston rod is run to the left during use, in normal temperature
Under low pressure, expansion loop keeps normal condition, and O-ring seal interior lip in the presence of elastic force compresses with piston rod periphery,
So as to realize low pressure seal, when temperature and pressure raises, expansion loop expanded by heating, expansion loop and pressure oil act on type sealing
Circle is allowed to be close to piston rod periphery and sealing ring installation hole wall respectively, realizes high pressure sealing.In sealing ring strength range,
Pressure is bigger, and the extruding force that O-ring seal is subject to is bigger, and sealing effectiveness is better, realizes self-energized seal.With it is simple in construction,
The advantages that good sealing effect, using effect are good.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is swelling ring structure schematic diagram of the present invention.
In figure：1- expansion loops；2- wear-resistant strips；3- dust rings；4- piston rods；5- pressure caps；6- guide sleeves；7- stopper rod cylinder bodies；
8- triangular washers；9- plain washers；10-O type sealing rings.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-2 is referred to, the present invention provides a kind of technical scheme：A kind of high temperature high voltage resistant movable sealing structure, including piston
Bar cylinder body 7 and the piston rod 4 inside the piston rod cylinder body 7, guide sleeve 6, the guiding are socketed with the piston rod 4
Cover 6 rear ends and be socketed with pressure cap 5, the pressure cap 5 is threadedly coupled with the piston rod cylinder body 7, inside the guide sleeve 6 with it is described
The position that piston rod 4 contacts is provided with dust ring 3 and wear-resistant strip 2, and the described front end of guide sleeve 6 is provided with O-ring seal 10, institute
State the rear end of O-ring seal 10 and be provided with plain washer 9, triangular washer 8, institute are provided between the plain washer 9 and the guide sleeve
State the front end inner edge of O-ring seal 10 and be provided with interior lip, outer lip is provided with outside the front end of O-ring seal 10, it is described O-shaped
The outside of sealing ring 10, plain washer 9 and triangular washer 8 is provided with expansion loop 1.
The expansion loop 1 is cirque structure, and the expansion loop 1 is made of metallic copper, and expansion loop 1, which has, to expand with heat and contract with cold
Characteristic；Added with one or both of carbon, graphite in the polytetrafluoroethylmaterial material of described O-ring seal 10；It is described swollen
The inner wall thickness of tensioner ring 1 is 2~3mm；The internal diameter of the guide sleeve 6 is equal to the outer diameter of piston rod 4.
Operation principle：A kind of high temperature high voltage resistant movable sealing structure of the invention, piston rod 4 is run to the left during use, in normal temperature
Under low pressure, expansion loop 1 keeps normal condition, O-ring seal 10 interior lip and 4 cylindrical face pressure of piston rod in the presence of elastic force
Tightly, so as to realizing low pressure seal；When temperature and pressure raises, the expanded by heating of expansion loop 1, expansion loop 1 and pressure oil act on O
Type sealing ring 6 is allowed to be close to the periphery of piston rod 4 and sealing ring installation hole wall respectively, realizes high pressure sealing.It is strong in sealing ring
In the range of degree, pressure is bigger, and the extruding force that O-ring seal 10 is subject to is bigger, and sealing effectiveness is better, realizes self-energized seal.Tool
Have the advantages that simple in construction, good sealing effect, using effect are good.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of high temperature high voltage resistant movable sealing structure, including piston rod cylinder body（7）With positioned at the piston rod cylinder body（7）Internal
Piston rod（4）, it is characterised in that：The piston rod（4）On be socketed with guide sleeve（6）, the guide sleeve（6）Rear end is socketed with pressure
Cap（5）, the pressure cap（5）With the piston rod cylinder body（7）Threaded connection, the guide sleeve（6）It is internal with the piston rod
（4）The position of contact is provided with dust ring（3）And wear-resistant strip（2）, described guide sleeve（6）Front end is provided with O-ring seal
（10）, the O-ring seal（10）Rear end is provided with plain washer（9）, the plain washer（9）It is provided between the guide sleeve
Triangular washer（8）, the O-ring seal（10）Front end inner edge is provided with interior lip, the O-ring seal（10）Set outside front end
It is equipped with outer lip, the O-ring seal（10）, plain washer（9）And triangular washer（8）Outside be provided with expansion loop（1）.
A kind of 2. high temperature high voltage resistant movable sealing structure according to claim 1, it is characterised in that：The expansion loop（1）For
Cirque structure, the expansion loop（1）It is made of metallic copper.
A kind of 3. high temperature high voltage resistant movable sealing structure according to claim 1, it is characterised in that：Described O-ring seal
（10）Using polytetrafluoroethylmaterial material, and added with one or both of carbon, graphite in polytetrafluoroethylmaterial material.
A kind of 4. high temperature high voltage resistant movable sealing structure according to claim 1, it is characterised in that：The expansion loop（1）'s
Inner wall thickness is 2~3mm.
A kind of 5. high temperature high voltage resistant movable sealing structure according to claim 1, it is characterised in that：The guide sleeve（6）'s
Internal diameter is equal to piston rod（4）Outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614577.5A CN107542722A (en) | 2017-07-25 | 2017-07-25 | A kind of high temperature high voltage resistant movable sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614577.5A CN107542722A (en) | 2017-07-25 | 2017-07-25 | A kind of high temperature high voltage resistant movable sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107542722A true CN107542722A (en) | 2018-01-05 |
Family
ID=60970270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710614577.5A Pending CN107542722A (en) | 2017-07-25 | 2017-07-25 | A kind of high temperature high voltage resistant movable sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107542722A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359687A (en) * | 1964-08-17 | 1967-12-26 | Haveg Industries Inc | Expansible seal |
| CN2186828Y (en) * | 1994-01-27 | 1995-01-04 | 沈阳工业大学 | Double-cone thermal expansion spacer |
| CN200952565Y (en) * | 2006-07-07 | 2007-09-26 | 陈旭东 | Moving machinery sealing device |
| CN102644746A (en) * | 2011-02-17 | 2012-08-22 | 任利民 | Axial sealing structure of scroll wrap |
| CN103201541A (en) * | 2010-08-31 | 2013-07-10 | 伯克哈特压缩机股份公司 | Seal arrangement |
| CN104315149A (en) * | 2014-10-24 | 2015-01-28 | 中国工程物理研究院化工材料研究所 | Dynamic sealing structure resistant to high temperature and high pressure |
-
2017
- 2017-07-25 CN CN201710614577.5A patent/CN107542722A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3359687A (en) * | 1964-08-17 | 1967-12-26 | Haveg Industries Inc | Expansible seal |
| CN2186828Y (en) * | 1994-01-27 | 1995-01-04 | 沈阳工业大学 | Double-cone thermal expansion spacer |
| CN200952565Y (en) * | 2006-07-07 | 2007-09-26 | 陈旭东 | Moving machinery sealing device |
| CN103201541A (en) * | 2010-08-31 | 2013-07-10 | 伯克哈特压缩机股份公司 | Seal arrangement |
| CN102644746A (en) * | 2011-02-17 | 2012-08-22 | 任利民 | Axial sealing structure of scroll wrap |
| CN104315149A (en) * | 2014-10-24 | 2015-01-28 | 中国工程物理研究院化工材料研究所 | Dynamic sealing structure resistant to high temperature and high pressure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |