CN203703104U - Drum type supercharging polycyclic composite seal plunger - Google Patents

Drum type supercharging polycyclic composite seal plunger Download PDF

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Publication number
CN203703104U
CN203703104U CN201320469793.2U CN201320469793U CN203703104U CN 203703104 U CN203703104 U CN 203703104U CN 201320469793 U CN201320469793 U CN 201320469793U CN 203703104 U CN203703104 U CN 203703104U
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China
Prior art keywords
seal
ring
sealing
district
seal ring
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CN201320469793.2U
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Chinese (zh)
Inventor
刘志昊
刘志政
李恒
李晓龙
杨昱琦
张子麟
李远顺
刘立起
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刘立起
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Abstract

The utility model discloses a drum type supercharging polycyclic composite seal plunger comprising a plunger body and a seal ring. The seal ring is formed by an annular seal ring body. An external annular surface and an internal annular surface of the seal ring body are a seal ring surface; the upper and the lower parts are seal ring end surfaces; a high pressure sealed plunger sealing body is formed by the plunger body and the seal ring; the high pressure sealed plunger sealing body and an oil cylinder are sealed to form a high pressure oil cylinder work cavity; the seal ring body at least faces one end of the oil cylinder work cavity and is provided with a low pressure seal area and a high pressure seal area; the low pressure seal area and the high pressure seal area are communicated with the oil cylinder work cavity; and the low pressure seal area and the high pressure seal ring are axially arranged. Compared with the prior art, the drum type supercharging polycyclic composite seal plunger is advantaged by simplicity, practicality, safety and reliability.

Description

Drum type supercharging encircles compound seal plunger more
Technical field
The utility model relates to a kind of drum type supercharging and encircles compound seal plunger more.
Background technique
The piston rod that hydraulic jack uses at present has two kinds of structural types, and a kind of is piston rod and piston one, and a kind of is piston rod and piston split, and these two kinds of structures are all by the seal ring sealing on piston.
Conventional seal ring form has: y-type seal ring, O RunddichtringO, Ge Laiquan, drum-type sealing ring etc.According to seal request, can use separately by a kind of seal ring, also can be used in combination by several seal rings.Generally, if will ensure the sealing effect of low pressure and high pressure simultaneously, just need several seal ring collocation to use.Accordingly, need to process several seal grooves seal ring is installed on piston, cause processing technology complicated, manufacture cost increases.
The general structure form of piston at present:
Now use the common structure pattern of piston as shown in Figure 1:
21 is piston body, and 22 is guide ring, and 23 is seal ring, and 24 is guide ring.
Working principle:
Working solution in seal ring confining liquid cylinder pressure active chamber on piston, the pressure of working solution forms upper and lower thrust by piston, thus promotion piston and piston rod move up and down.Reliable for ensureing sealing, multiple seal rings are installed on the piston of being everlasting; The quantity of guide ring is determined as required, and its effect is stable while ensureing that piston moves up and down, and piston rod does not scratch cylinder wall.
But present piston seal effect is desirable not to the utmost, can not meet high low pressure sealing.
Summary of the invention
The purpose of this utility model is to overcome piston structure more complicated, shortcoming that manufacture cost is higher, provide a kind of drum type supercharging to encircle compound seal plunger more, replace the piston sealing structure of current complexity, compared with prior art, there is simple, practical, safe and reliable advantage.
For achieving the above object, the technical program is as follows:
A kind of drum type supercharging encircles compound seal plunger more, comprise plunger body and seal ring, described seal ring comprises O-ring seal body, inside and outside two anchor rings of seal ring body are sealing ring surface, be seal ring end face up and down, described plunger body and seal ring composition high pressure sealing plunger seal body, high pressure sealing plunger seal body and cylinder seal and form high-voltage oil cylinder active chamber, described seal ring body, at least towards one end of oil cylinder active chamber, is provided with low pressure seal district and high pressure sealing district; Described low pressure seal district, high pressure sealing district communicate with oil cylinder active chamber, and low pressure seal district and high pressure sealing district axially arrange along seal ring.
Further, described plunger body is piston rod, and piston rod is provided with at least one for holding the annular seal groove of above-mentioned seal ring, and seal ring is fixed in ring packing ring recess by pressing plate or trim ring or seal ring dividing plate; Pressing plate or trim ring or seal groove dividing plate are provided with the through hole or the groove that connect seal ring and oil cylinder active chamber.
Further, described plunger body comprises the special sealing ring carrier coordinating with oil cylinder inner wall, and at least one end of special sealing ring carrier is fixed with piston rod, is provided with at least one for holding the annular seal groove of above-mentioned seal ring on special sealing ring carrier.
Further, low pressure seal district starts from seal ring end face, and high pressure sealing district is positioned at the rear side in low pressure seal district.
Further, low pressure seal district and high pressure sealing interval are provided with supporting clapboard, and supporting clapboard is provided with the liquid filling hole that connects high pressure sealing district and low pressure seal district.
Further, described low pressure seal district is V-structure, and the opening end of V-structure is towards oil cylinder active chamber.
Further, described low pressure seal district is included in the pressure buffer groove arranging on seal ring end face, and described liquid filling hole is positioned at the inner side of pressure buffer groove.
Further, described high pressure sealing district comprises the pressurising chamber of a hollow, and pressurising chamber is connected by liquid filling hole and low pressure seal district.
Further, the drum-shape sealing ring that described high pressure sealing district is hollow, hollow drum-shape sealing ring is connected by liquid filling hole and low pressure seal district.
Further, on described inside and outside two sealing ring surfaces, 0-N road seal ring is set respectively; The outside diameter in low pressure seal district is the maximum diameter of seal ring; The minimum diameter that the interior circular diameter in low pressure seal district is seal ring.
Further, described seal ring is at least provided with anti-extrusion ring in one end.
Further, low pressure seal district starts from seal ring end face, and high pressure sealing district is positioned at the rear side in low pressure seal district.
Further, liquid filling hole is along being parallel or angle direction conducting with seal ring axial direction, and liquid filling hole is one or a several or whole piece looping pit.
Working principle of the present utility model and working procedure are as follows:
The utility model is removed original piston form, described plunger body and seal ring composition high pressure sealing plunger seal body, and high pressure sealing plunger seal body and cylinder seal and form high-voltage oil cylinder active chamber, realize and sealing.
Plunger body and seal ring have following several Connecting format:
1, plunger body is piston rod, is applicable to the less situation in gap of piston rod and seal ring, piston rod be provided with seal groove, fitted seal circle in seal groove, seal ring is located in the annular groove of piston rod.
2, plunger body comprises piston rod and the special sealing ring carrier for fixed piston rod, be applicable to the less situation in gap of piston rod and seal ring, special sealing ring carrier is one end fixed piston rod at least, and special sealing ring carrier outer wall is provided with seal groove, fitted seal circle in seal groove, seal ring is located in the annular groove of piston rod.
Above several Placements, for ensureing that seal ring is unlikely to be extruded in Sealing generation relative movement, can arrange anti-extrusion ring at the end of topping up up and down of seal ring.
By the gap between plunger body and oil cylinder, by the axial direction of cylinder barrel, non-radial direction enters into seal ring to working medium.
For seal ring, be all generally O-ring seal, for adapting to seal request, seal ring needs tool to have the dimensions, therefore when seal ring horizontal positioned, the inside and outside anchor ring of seal ring is that Sealing coordinates the sealing ring surface of realizing sealing, the end face that the upper and lower end of seal ring is seal ring.
With the parts of seal ring fitted seal have for one-way only operation, such as hydraulic prop, have plenty of two-way working, such as two-way hydraulic cylinder, no matter be unidirectional or two-way working, be all to realize by feed flow in oil cylinder, the active chamber after topping up is oil cylinder active chamber; For meeting the above-mentioned single, double sealing needs to work, in the one end towards oil cylinder active chamber, (if one-way only operation is provided with one end, if two-way working is provided with at two ends) is provided with low pressure seal district and high pressure sealing district to this seal ring; Low pressure seal district all communicates with oil cylinder active chamber with high pressure sealing district, realizes respectively low pressure seal and high pressure sealing after feed flow.
Along the axial setting that is parallel to seal ring body, there are two kinds of forms in high pressure sealing district and low pressure seal district: one, and low pressure seal district starts from seal ring end face, and high pressure sealing district is positioned at rear portion, low pressure seal district; Two, high pressure sealing district starts from seal ring end face, and low pressure seal district is positioned at rear portion, high pressure sealing district.
In above-mentioned two forms, the form of perforation can be then to connect with oil cylinder active chamber after low pressure seal district and high pressure sealing district connect, and can be also to communicate with oil cylinder active chamber separately.
The preferred integral structure in high and low pressure seal area.
Inside and outside two sealing ring surfaces of this seal ring body are for sealing, this seal ring body towards oil cylinder active chamber end face for topping up, seal body is expanded to two sealing ring surface directions.
This seal ring connects low pressure seal district and high pressure sealing district along being divided on the axial direction of seal ring, and wherein low pressure seal district is positioned at seal ring outer end for realizing the sealing under low pressure, and high pressure sealing district is for realizing the sealing of high pressure.
If sealing workpiece is unidirectional topping up, can be provided with low pressure seal district and high pressure sealing district at a pressurising end face; If sealing workpiece is two-way topping up, can on two pressurising end faces, respectively be provided with low pressure seal district and high pressure sealing district, wherein pressurising chamber is led in low pressure seal district.
Low pressure seal district can adopt V-type hatch frame (y-type seal ring), also can pressure buffer district be set on pressurising end face, realizes the sealing under low pressure.
High pressure sealing district comprises a pressurising chamber, pressurising chamber by hold and full high-pressure working medium to surrounding expand form sealing, seal ring is expanded to two sealing ring surfaces, seal ring entirety outwards expands, adhesive force between sealing ring surface and oil cylinder inner wall or plunger seal groove bottom obviously increases, and reaches the object of supercharging sealing.
Compared with prior art, the full of Yin Ben high pressure sealing district is to realize through the liquid filling hole of perforation low pressure seal district and high-pressure seal ring, instead of inwardly full mode of sealing ring surface, the phenomenon that therefore also just there will not be interior external force to offset, and sealing effect is better.
It between low pressure seal district and high pressure sealing district, is not the direct perforation mode of whole open types, but between is provided with supporting clapboard, realize the state that both separate or cut off, and the liquid filling hole that some is set on supporting clapboard is for connecting low pressure seal district and high pressure sealing district, like this, the bulk strength of this seal ring is than large many of the structural type with respect to comprehensively directly connecting between the two, ensures that low pressure seal district can well serve as the use of low pressure seal structure; Simultaneously because high pressure sealing district implementation of port---liquid filling hole is positioned at and is located at seal ring on the pressurising end face in pressurising chamber, instead of arrange on liquid filling hole at inside and outside sealing ring surface, like this, under high pressure sealing state time, can ensure that Sealing carries out efficient expansion to two sealing ring surface directions, fully ensure the sealing effect of high pressure, can effectively take into account high pressure and low pressure seal.
On sealing ring surface, be provided with 1-N road seal ring, the in the situation that of seal ring topping up pressurized, sealing ring surface is fitted more needs the anchor ring of sealing, and is to be applied to two ends by centre, further improves sealing effect.Meanwhile, arranging of multiple-sealed ring ensured: under high pressure conditions, the sealing force in high pressure sealing district increases because of pressurising chamber highly pressurised liquid expansive force; In the time that wherein certain road seal ring lost efficacy, other seal ring substitute sealing, and rust spot can be sealed, reach MULTIPLE COMPOSITE sealing purpose.
The sealing ring surface of pressurising end face is seal ring maximum secting area place, the cylindrical that is low pressure seal is that diameter greatest circle, inner circle are diameter smallest circle, like this in the time of low pressure or high pressure, and the seal ring sectional area maximum of pressurising end face, can realize the sealing of low pressure and high pressure, improve sealing effect.
Pressurising end face is provided with pressure buffer groove, pressure buffer groove is the continuous or interrupted annular groove of a recessed pressurising end face: can extend along the circumferential direction of sealing disc always, also can not extend along seal face direction, such as being interrupted ring channel structures; Its shape of cross section is similar to the cross section of seal ring corresponding site, but slightly smaller, also can need to be designed to other any geometrical shape according to ring structure.The Main Function of pressure buffer groove is buffering s, and carries out fluid injection by liquid filling hole to the pressurising chamber in high pressure sealing district.
Described pressurising chamber, is the annular cavity in high pressure sealing district, by supporting clapboard, itself and pressure buffer groove is separated.The Main Function in pressurising chamber is to store high-pressure work liquid, and inside, external sealed anchor ring carrier fluid pressure, strengthen the adhesive force that seals interface, improves sealing effect.
The utility model can effectively solve the deficiencies such as the performance that current sealing configuration exists is single, adaptive capacity is poor, safety coefficient is low, working life is short.
To sum up, the beneficial effects of the utility model are embodied in:
This type compound seal handgrip has following features:
On (1) seal ring, have the duplex of conventional seals ring and two kinds of sealings of drum type supercharging seal ring concurrently, make hydraulic prop can adapt to the complex working conditions such as the low pressure, high pressure, change pressure of mining face under mine.
(2) adopt the compound seal form of many rings, the sealing of can substituting mutually between multiple different sealing anchor rings of seal ring, adds drum type supercharging sealing effect, makes the sealingly secure coefficient of hydraulic prop improve several times.
(3) it is rational in infrastructure that drum type supercharging encircles two sealing ring surfaces of composite sealing ring more, ensures that drum type seals effective supercharging, can obviously improve the sealing effect of pillar.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiments that record in the application, 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 former piston structure schematic diagram;
Fig. 2 is one-way sealing coil structures schematic diagram;
Fig. 3 is one-way sealing seal sealing ring surface structural representation;
Fig. 4 is two-way sealing ring structural representation;
Fig. 5 is that little gap is unidirectional without pressing plate piston body schematic diagram;
Fig. 6 is that little gap is unidirectional a pressing plate piston body schematic diagram;
Fig. 7 is that large gap unidirectional employing special sealing ring carrier is without pressing plate piston body schematic diagram;
Fig. 8 is that large gap unidirectional employing special sealing ring carrier has pressing plate piston body schematic diagram;
Fig. 9 is that little gap is two-way without pressing plate piston body schematic diagram;
Figure 10 is that little gap is two-way a pressing plate piston body schematic diagram;
Figure 11 is that large gap two-way employing special sealing ring carrier is without pressing plate piston body schematic diagram;
Figure 12 is that large gap two-way employing special sealing ring carrier has pressing plate piston body schematic diagram;
Figure 13-16 are the piston body schematic diagram of two-way working one-way sealing;
Figure 17 is piston body work force analysis schematic diagram.
Embodiment
The correlation technique content of not addressing below all can adopt or use for reference prior art.
In order to make those skilled in the art person understand better the technological scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technological scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment who obtains under creative work prerequisite, all should belong to the scope of the application's protection.
Embodiment 1
A kind of drum type supercharging encircles compound seal plunger more, comprises plunger body, between plunger and cylinder barrel, is provided with seal ring.
According to single-direction and dual-direction motion and seal request, for one-way sealing, structure is as follows:
A kind of drum type supercharging encircles composite sealing ring more, as shown in Figure 2, comprises seal ring body 10, and seal ring body 10 is annular, and common is annulus cylindricality, can certainly select according to the concrete needs of air-proof condition.
Along seal ring body 10 center radial direction, inside and outside two anchor rings of seal ring body 10 are sealing ring surface 13; Along the axial direction of seal ring body 10, the both ends of the surface up and down of seal ring body are pressurising end face 14.
The present embodiment is one-way sealing, be only to have the pressurising end face of one end to be provided with low pressure seal district 11 and the high pressure sealing district 12 of integrated form in two pressurising end faces 14 of seal ring body 1, and two seal ring districts connect mutually, low pressure seal district 11 starts from pressurising end face and leads to active chamber---working medium suppress region, be that working medium can flow into low pressure seal district 11 by active chamber, and high pressure sealing district 12 is positioned at the rear side in low pressure seal district 11.
Described low pressure seal district 11 is V-structure, and opening is provided with pressure buffer groove 111 towards oil cylinder active chamber or at pressurising end face, and the present embodiment adopts the latter---the form of pressure buffer groove 111 is set, but does not get rid of the form that adopts Y-shaped ring.
Described high pressure sealing district 12 adopts the drum-shape sealing ring form of hollow; Or high pressure sealing district 12 comprises the pressurising chamber 121 of a sealing, the present embodiment adopts the form in pressurising chamber 121 of arranging, equally but do not get rid of the form that adopts drum-type sealing ring.
Between low pressure seal district 11 and high pressure sealing district 12, be provided with supporting clapboard 15, supporting clapboard 15 is provided with the liquid filling hole 16 that connects high pressure sealing district 12 and low pressure seal district 11, and the liquid filling hole 16 of the present embodiment is positioned at the bottom land of pressure buffer groove 111 and is preferably axial direction; The quantity of liquid filling hole 16 can be selected as required; can arrange 1-N; as long as can realize low pressure seal district 11 and 12 conductings of high pressure sealing district; certainly under limit case, liquid filling hole 16 quantity increase, and hole more greatly, when longer; supporting clapboard area is just less than liquid filling hole area; supporting clapboard reality has just formed partition or connecting tendon, and this kind of mode also should be considered as being equal to the mode that supporting clapboard is set, within the protection domain of creating at the utility model.
On described inside and outside two sealing ring surfaces 13,0-N road seal ring is set respectively, under extreme case or working pressure be not in very high situation, also can select not arrange seal ring, certainly for ensureing sealing effect, seal ring is preferably set, this seal ring can arrange multiple, especially in high pressure sealing district 12, be to ensure that sealing effect more should arrange multiple, certainly, 0-N is also not limited to integer, also can be for arranging separately half, such as: the maximum diameter that the outside diameter in low pressure seal district 11 is seal ring; The minimum diameter that the interior circular diameter in low pressure seal district 11 is seal ring, realizes fitting tightly of low pressure seal district 11 and Sealing, ensures sealing intensity and sealing effect.
As shown in Figure 3, the seal ring of Sealing has 4 kinds to seal ring concrete structure: 13A, 13B are respectively inside and outside sealing ring surface, i.e. high pressure sealing anchor ring.As required, this drum type anchor ring can arrange 1~N road.
13C, 13D are conventional seals anchor ring, i.e. low pressure seal anchor ring.As required, this low pressure seal anchor ring can arrange 1~N road.
In the time of hydraulic prop operating on low voltage, the pressure of working solution is low, and drum-type sealing ring inner chamber tension is little, and the sealing force of formation is also little, at this moment mainly relies on 13C, the sealing of 13D face; In the time of hydraulic prop high-pressure work, the pressure of working solution is large, and sealing force increases, mainly by 13A, the sealing of 13B face.
Pressure buffer groove 111 is recessed pressurising end face 14 continuously or the trench structure being interrupted, and its cross section is arc, square or polygonal at least one or combination, and the present embodiment adopts structure shown in continuous Fig. 2.
A. supercharging sealing principle
High-pressure work liquid in oil hydraulic cylinder inner chamber enters seal ring inner chamber by special liquid filling hole, high-pressure work liquid forms tension at seal ring inner chamber to drum type sealing ring surface, i.e. the adhesive force of anchor ring and oil cylinder inner wall outside the adhesive force of the interior side ring surface of seal ring and rod seal groove bottom, seal ring.Under the effect of highly pressurised liquid, these two sealing forces increase greatly, make sealingly secure coefficient improve several times.
Due to the effect of seal ring inner chamber liquid tension, this sealing configuration prominent meets that hyperpressure, the variation of cylinder diameter certain limit, wearing and tearing of seal ring etc. are severe at hydraulic equipment, under complex working condition, can both keep reliable sealing.
B, compound seal principle
Seal ring used is the compound seal ring being combined by pressure common sealing ring surface and high pressure sealing anchor ring
(a), complementary sealing
When oil hydraulic cylinder is during in low pressure operating mode, mainly rely on 2 in Fig. 5 and the sealing of 5 low pressure seal anchor rings; When oil hydraulic cylinder is during in high pressure operating mode, mainly rely on 1 in Fig. 5 and 4 inside and outside each twice high pressure sealing anchor rings sealings, realize the sealing complementation between high and low pressure.
The high and low pressure of sealing circle seals complementary feature, has overcome two defects of current seal ring, and the one, the good and low pressure seal weak effect of high pressure sealing, the 2nd, low pressure seal is good and high pressure seal result is poor.
(b), substitute sealing
Drum type supercharging encircles between each sealing ring surface of compound seal ring formation more, if wherein certain sealing ring surface damages and lost efficacy, other sealing ring surface still plays seal action reliably, and oil hydraulic cylinder can trouble free service, and each sealing ring surface can be realized sealing substitute each other.
(c), compensation sealing
Drum type supercharging encircles in compound seal ring formation structure more, can suitably increase width and the quantity of sealing ring surface, effectively to avoid because the burn into of sealing handle seal groove or piston rod surface damages the seal failure causing, ensure that oil hydraulic cylinder has reliable sealingly secure under ultrahigh pressure operating mode.Give full play to the advantage of the utility model duplex, compound seal.
Drum type supercharging encircles composite sealing ring more and possesses high and low pressure duplex simultaneously, and many ring substitute sealing mechanisms, sealing face damage compensation ability, be to encircle compound seal for drum type supercharging more.
This seal ring can effectively solve the deficiencies such as the performance that current sealing configuration exists is single, adaptive capacity is poor, safety coefficient is low, working life is short.
The application of this one-way seal ring, structure is as follows:
Be applicable to diameter of piston rod and oil cylinder internal diameter gap hour, as various jack, hydraulic prop etc., in the end of piston rod 1, drum type supercharging is installed and encircles composite sealing ring 3 more, replace piston type sealing, tool for mounting body structure is as follows: the end car of piston rod 1 goes out annular groove, in annular groove, be arranged with seal ring 3, seal ring 3 inner sides are that piston rod 1, outside are oil cylinder 4.When use, seal ring 3 is inserted in annular groove, because of the oil cylinder active chamber of Fig. 5 below, therefore be provided with anti-extrusion ring 2 in the upper end of annular groove inner seal ring 3, reach anti-extrusion effect, for reaching the object of rapid feed flow, be provided with at least one fluid injection through hole 6 in the end of piston rod 1, fluid injection through hole 6 connects with the pressure buffer groove of seal ring.
Installation as above-mentioned seal ring improves, and as shown in Figure 6, the difference of Fig. 6 and Fig. 5 is: annular groove starts from the end face of piston rod 1, and pressing plate 5 is set below seal ring 3, and fluid injection through hole 6 is opened on pressing plate 5.
Be applicable to diameter of piston rod and oil cylinder internal diameter gap when larger, shown in Fig. 7, at the fixing special sealing ring carrier 7 in the end of piston rod 1, special sealing ring carrier 7 is installed drum type supercharging and is encircled composite sealing ring 3 more, replace piston type sealing, tool for mounting body structure is as follows: the end car of special sealing ring carrier 7 goes out annular groove, is arranged with seal ring 3 in annular groove, and seal ring 3 inner sides are that special sealing ring carrier 7, outside are oil cylinder 4.When use, seal ring 3 is inserted in annular groove, because of the oil cylinder active chamber of Fig. 7 below, therefore be provided with anti-extrusion ring 2 in the upper end of annular groove inner seal ring 3, reach anti-extrusion effect, for reaching the object of rapid feed flow, be provided with at least one fluid injection through hole 6 in the end of special sealing ring carrier 7, fluid injection through hole 6 connects with the pressure buffer groove of seal ring.
Installation as above-mentioned seal ring improves, and as shown in Figure 8, the difference of Fig. 8 and Fig. 7 is: annular groove starts from the end face of special sealing ring carrier 7, and pressing plate 5 is set below seal ring 3, and fluid injection through hole 6 is opened on pressing plate 5.
Embodiment 2
When two way sealed, except following structure with unidirectional identical.
Two-way for meeting (such as two-way cylinder) pressurising, need of work, this two-way low pressure seal district 11 and high pressure sealing district 12 that is respectively provided with a set of perforation on two pressurising end faces 14 of seal ring body 1, as shown in Figure 4, the low pressure seal district 11 of every cover and the form that arranges in high pressure sealing district 12 are stated as one-way sealing.
The application of this two-way sealing ring, structure is as follows:
Be applicable to diameter of piston rod and oil cylinder internal diameter gap hour, as various jack, hydraulic prop etc., as shown in Figure 9, in the end of piston rod 1, drum type supercharging is installed and encircles composite sealing ring 3 more, replace piston type sealing, tool for mounting body structure is as follows: the end car of piston rod 1 goes out annular groove, is arranged with seal ring 3 in annular groove, and seal ring 3 inner sides are that piston rod 1, outside are oil cylinder 4.When use, seal ring 3 is inserted in annular groove, because of the oil cylinder active chamber of Fig. 5 below, therefore be respectively provided with anti-extrusion ring 2 in the top and bottom of annular groove inner seal ring 3, reach anti-extrusion effect, for reaching the object of rapid feed flow, be provided with at least one fluid injection through hole 6 in the end of piston rod 1, fluid injection through hole 6 connects with the pressure buffer groove of seal ring.
Installation as above-mentioned seal ring improves, and as figure, shown in 10, the difference of Figure 10 and Fig. 9 is: annular groove starts from the end face of piston rod 1, and pressing plate 5 is set below seal ring 3, and fluid injection through hole 6 is opened on pressing plate 5.
Be applicable to diameter of piston rod and oil cylinder internal diameter gap when larger, shown in Figure 11, being set on special sealing ring carrier 7 of piston rod 1, special sealing ring carrier 7 is installed drum type supercharging and is encircled composite sealing ring 3 more, replace piston type sealing, tool for mounting body structure is as follows: the end car of special sealing ring carrier 7 goes out annular groove, is arranged with seal ring 3 in annular groove, and seal ring 3 inner sides are that special sealing ring carrier 7, outside are oil cylinder 4.When use, seal ring 3 is inserted in annular groove, because of the oil cylinder active chamber of Fig. 7 below, therefore be provided with anti-extrusion ring 2 in the upper end of annular groove inner seal ring 3, reach anti-extrusion effect, for reaching the object of rapid feed flow, be provided with at least one fluid injection through hole 6 in the end of special sealing ring carrier 7, fluid injection through hole 6 connects with the pressure buffer groove of seal ring.
Installation as above-mentioned seal ring improves, and as shown in figure 12, the difference of Figure 12 and Fig. 7 is: annular groove starts from the end face of special sealing ring carrier 7, and pressing plate 5 is set below seal ring 3, and fluid injection through hole 6 is opened on pressing plate 5.
Certainly two way sealed can adopt two ends to be respectively provided with the form of an one-way sealing, and the size in corresponding single-direction and dual-direction and piston rod and oil cylinder gap is as shown in Figure 13-16.
Taking the compound sealing configuration in two-way drum type supercharging Fourth Ring as example, its structure is mainly made up of the compound seal ring of improved piston rod and drum type supercharging Fourth Ring, analyzes its stressing conditions.
Encircle composite sealing ring combination through improved piston rod and the supercharging of beidirectional drum type more, Figure 17: piston rod 103 is fixed on special sealing ring carrier 102, in the annular groove of the sheathed special sealing ring carrier 102 of seal ring, and fixing by press table 109, form a reliable Bidirectional seal structure
101 is liquid cylinder, and 102 is special sealing ring carrier, and 103 is piston rod, 104 is upward pressure dashpot, and 105 is upper liquid filling hole, and 106 is piston seal groove bottom reinforcement, 107 is lower liquid filling hole, 108 is downforce dashpot, and 109 is press table, and 1010 is lower active chamber pressure, 1011 is upper active chamber pressure, 1012 is upper low pressure seal face reinforcement, and 1013 is oil cylinder inner wall reinforcement, and 1014 is lower low pressure seal face reinforcement.
In the time of the topping up of lower end, form lower active chamber pressure 1010, act on the one hand the lower low pressure seal face reinforcement 1014 of formation on seal ring, working medium enters into pressurising chamber through downforce dashpot 104, lower liquid filling hole 107 on the other hand, be formed on oil cylinder inner wall reinforcement 1013 and piston seal groove bottom reinforcement 106 on liquid cylinder 101, thereby ensure sealing effect.
In like manner, in the time of the topping up of lower end, active chamber pressure 1011 in formation, act on the one hand and on seal ring, form low pressure seal face reinforcement 1012, working medium enters into pressurising chamber through upward pressure dashpot 108, upper liquid filling hole 105 on the other hand, be formed on oil cylinder inner wall reinforcement 1013 and piston seal groove bottom reinforcement 106 on liquid cylinder 101, thereby ensure sealing effect.
Visible, drum type supercharging encircles compound sealing structure more and adopts to encircle supercharging composite sealing rings more, realizes high and low pressure sealing complementary, effect of many rings compound seal of substituting mutually between each sealing ring surface; And can make up because rod seal groove or oil cylinder inner wall burn into damage the seal failure causing, ensure that oil hydraulic cylinder has sealingly secure coefficient reliably under ultrahigh pressure operating mode, give full play to the effect of the utility model duplex, compound seal.
The above is only the application's preferred implementation, makes those skilled in the art can understand or realize the application.To be apparent to one skilled in the art to these embodiments' multiple amendment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a drum type supercharging encircles compound seal plunger more, comprise plunger body and seal ring, described seal ring comprises O-ring seal body (10), in seal ring body, outer two anchor rings are sealing ring surface (13), be seal ring end face (14) up and down, it is characterized in that: described plunger body and seal ring composition high pressure sealing plunger seal body, high pressure sealing plunger seal body and cylinder seal and form high-voltage oil cylinder active chamber, described seal ring body (10) is at least towards one end of oil cylinder active chamber, be provided with low pressure seal district (11) and high pressure sealing district (12), described low pressure seal district (11), high pressure sealing district (12) communicate with oil cylinder active chamber, and low pressure seal district (11) axially arrange along seal ring with high pressure sealing district (12).
2. drum type supercharging according to claim 1 encircles compound seal plunger more, it is characterized in that: described plunger body is piston rod, piston rod is provided with at least one for holding the annular seal groove of above-mentioned seal ring, and seal ring is fixed in ring packing ring recess by pressing plate or trim ring or seal ring dividing plate; Pressing plate or trim ring or seal groove dividing plate are provided with the through hole or the groove that connect seal ring and oil cylinder active chamber.
3. drum type supercharging according to claim 1 encircles compound seal plunger more, it is characterized in that: described plunger body comprises the special sealing ring carrier coordinating with oil cylinder inner wall, at least one end of special sealing ring carrier is fixed with piston rod, is provided with at least one for holding the annular seal groove of above-mentioned seal ring on special sealing ring carrier.
4. drum type supercharging according to claim 1 encircles compound seal plunger more, it is characterized in that:
Low pressure seal district (11) starts from seal ring end face, and high pressure sealing district (12) are positioned at the rear side of low pressure seal district (11).
5. encircle compound seal plunger according to the drum type supercharging described in claim 1 or 4 more, it is characterized in that: between low pressure seal district (11) and high pressure sealing district (12), be provided with supporting clapboard (15), supporting clapboard (15) is provided with the liquid filling hole (16) that connects high pressure sealing district (12) and low pressure seal district (11).
6. drum type supercharging according to claim 5 encircles compound seal plunger more, it is characterized in that: described low pressure seal district (11) is V-structure, and the opening end of V-structure is towards oil cylinder active chamber.
7. drum type supercharging according to claim 5 encircles compound seal plunger more, it is characterized in that: described low pressure seal district (11) is included in the pressure buffer groove (111) arranging on seal ring end face, and described liquid filling hole (16) is positioned at the inner side of pressure buffer groove (111).
8. drum type supercharging according to claim 5 encircles compound seal plunger more, it is characterized in that: described high pressure sealing district (12) comprises the pressurising chamber (121) of a hollow, and pressurising chamber (121) are connected by liquid filling hole and low pressure seal district (11).
9. drum type supercharging according to claim 6 encircles compound seal plunger more, it is characterized in that: the drum-shape sealing ring that described high pressure sealing district (12) is hollow, hollow drum-shape sealing ring is connected with low pressure seal district (11) by liquid filling hole (16).
10. drum type supercharging according to claim 5 encircles compound seal plunger more, it is characterized in that: 0-N road seal ring is set respectively on described inside and outside two sealing ring surfaces (13); The outside diameter in low pressure seal district is the maximum diameter of seal ring; The minimum diameter that the interior circular diameter in low pressure seal district is seal ring.
CN201320469793.2U 2013-08-03 2013-08-03 Drum type supercharging polycyclic composite seal plunger Expired - Fee Related CN203703104U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320469793.2U CN203703104U (en) 2013-08-03 2013-08-03 Drum type supercharging polycyclic composite seal plunger

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Application Number Priority Date Filing Date Title
CN201320469793.2U CN203703104U (en) 2013-08-03 2013-08-03 Drum type supercharging polycyclic composite seal plunger

Publications (1)

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CN203703104U true CN203703104U (en) 2014-07-09

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352979B (en) * 2013-08-03 2015-11-18 刘立起 Drum type supercharging many rings compound seal plunger
EP3106718A1 (en) * 2015-06-17 2016-12-21 Hamilton Sundstrand Corporation Improved piston ring sealing for pneumatic actuator
TWI681164B (en) * 2016-07-22 2020-01-01 鄒卓偉 Gun body airtight piston device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103352979B (en) * 2013-08-03 2015-11-18 刘立起 Drum type supercharging many rings compound seal plunger
EP3106718A1 (en) * 2015-06-17 2016-12-21 Hamilton Sundstrand Corporation Improved piston ring sealing for pneumatic actuator
US10094472B2 (en) 2015-06-17 2018-10-09 Hamilton Sundstrand Corporation Piston ring sealing for pneumatic actuator
TWI681164B (en) * 2016-07-22 2020-01-01 鄒卓偉 Gun body airtight piston device

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Granted publication date: 20140709

Termination date: 20170803