CN208073898U - A kind of piston DAS sealing is combined the unit with support ring - Google Patents

Abstract

A kind of piston DAS sealings of the utility model offer are combined the unit with support ring, are related to engineering original paper technical field.It includes：The cylinder barrel of piston and piston socket, piston is equipped with parallel sealed groove and brace channel, and sealed groove is embedded with DAS combined seal rings, and brace channel is embedded with support ring, DAS combined seal rings are tightly connected with inner wall of cylinder movement, support ring and the removable connection of inner wall of cylinder.The technical issues of the utility model solves piston in the prior art and has beat by a relatively large margin, and outside piston then occurs to wipe to touch, damage cylinder barrel and obturator, eventually lead to oil cylinder failure with inner hole of cylinder.The utility model has the beneficial effect that：DAS combined seal rings and support ring combination, it is more advantageous to guiding, bearing, positioning and sealing function of the piston in inner hole of cylinder operational process, it prevents from piston from outside piston occurs under the action of radial load when inner hole of cylinder is back and forth run to touch with inner hole of cylinder wiping, cylinder barrel and obturator are avoided damage to, is prolonged the service life.

Description

A kind of piston DAS sealing is combined the unit with support ring

Technical field

The utility model is related to engineering original paper technical fields, more particularly, to a kind of oil cylinder piston sealing device.

Background technology

As the DAS combined seal rings of hole sealing, it is widely used in engineering machinery, farm machinery, ship machinery, oil All kinds of two-way cylinders such as machinery.Chinese patent application publication No. CN102451859A, data of publication of application on May 16th, 2012, The application for a patent for invention file of entitled " a kind of feeding cylinder assembly of extruder ", disclose it is one such use structure.It Including feeding cylinder body, piston rod, piston body, sliding block, sliding block is installed on the downside of feeding cylinder body, feeding cylinder interior is horizontally disposed with piston The piston body outside of bar, piston rod fixing end position is cased with DAS combined seal rings；Piston body end is equipped with a circle stop washer And by nut check, which is equipped with cylinder body rear cover.Use sealing only in the hole that the structure hydraulic oil cylinder piston uses One of DAS combined seal rings sealing is installed, although DAS combined seal rings or so end is provided with support ring, its support ring and work The gap of plug brace channel bottom diameter is larger and support ring is closer with seal spacing distance so that piston support is ineffective. When piston and piston rod are back and forth run, piston and piston rod have beat by a relatively large margin, especially have in piston rod larger Under the action of radial load, since support effects are bad, outside piston then occurs to wipe with inner hole of cylinder touches phenomenon, influences oil cylinder operation Precision, damage cylinder barrel and obturator eventually lead to oil cylinder failure.

Utility model content

Beat by a relatively large margin is had in order to solve piston in the prior art, outside piston is then wiped with inner hole of cylinder The technical issues of touching, damage cylinder barrel and obturator, eventually leading to oil cylinder failure, it is close that the utility model provides a kind of piston DAS Envelope is combined the unit with support ring, to achieve the effect that enhance the bearing of piston and inner hole of cylinder, prevents piston past in inner hole of cylinder Outside piston occurs under the action of radial load when running again to touch with inner hole of cylinder wiping.

The technical solution of the utility model is：A kind of piston DAS sealing is combined the unit with support ring, it includes：Piston with The cylinder barrel of piston socket, piston are equipped with parallel sealed groove and brace channel, and sealed groove is embedded with DAS combined seal rings, Brace channel is embedded with support ring, and DAS combined seal rings are tightly connected with inner wall of cylinder movement, and support ring can with inner wall of cylinder Mobile connection.DAS combined seal rings and support ring combination are more advantageous to guiding, branch of the piston in inner hole of cylinder operational process Hold, position and sealing function, prevent piston occur under the action of radial load when inner hole of cylinder is back and forth run outside piston with Inner hole of cylinder wiping is touched.

Preferably, sealed groove section is T shapes, it is arranged within one week along outside piston.

Preferably, brace channel rectangular cross-section, is arranged for one week along outside piston.

Compared with prior art, the utility model has the beneficial effects that：DAS combined seal rings and support ring combination, more have Conducive to guiding, bearing, positioning and sealing function of the piston in inner hole of cylinder operational process, prevent piston reciprocal in inner hole of cylinder Outside piston occurs under the action of radial load when operation to touch with inner hole of cylinder wiping, avoids damage to cylinder barrel and obturator, extends Service life.

Description of the drawings

Attached drawing 1 is the utility model connection diagram.

In figure：1- pistons；2- cylinder barrels；3- support rings；4-DAS combined seal rings；11- brace channels；12- sealed grooves； 41- sealing ring ontologies；42- sealing ring support rings.

Specific implementation mode

Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.

Embodiment 1：

As shown in Figure 1, a kind of piston DAS sealings are combined the unit with support ring, it includes：The cylinder that piston 1 is socketed with piston 1 Cylinder 2.Piston 1 is that cylindric, cylinder barrel 2 is cylindric, piston 1 and 2 inner wall clearance fit of cylinder barrel.Piston 1 can be in 2 endoporus of cylinder barrel Reciprocal operation.Piston 1 is equipped with parallel sealed groove 12 and brace channel 11.Brace channel 11, sealed groove 12 are located at piston 1 Periphery.11 rectangular cross-section of brace channel is arranged for one week along 1 outer circle of piston.12 section of sealed groove is T shapes, along piston 1 Outer circle is arranged for one week.Brace channel 11 is mutually parallel with sealed groove 12.Sealed groove 12 is embedded with DAS combined seal rings 4. DAS combined seal rings 4 are tightly connected with the movement of 2 inner wall of cylinder barrel.DAS combined seal rings 4 include：Sealing ring ontology 41 and sealing ring Support ring 42.42 section of sealing ring support ring is L-shaped.There are two sealing ring support rings 42.Sealing ring ontology 41 is socketed in section For the vertical component effect of T shapes sealed groove 12.41 outer ring of sealing ring ontology is tightly connected with the movement of 2 inner wall of cylinder barrel.Sealing ring support ring 42 sections L-shaped vertical component effect insertion section is the vertical component effect of T shapes sealed groove 12.The L-shaped level in 42 section of sealing ring support ring Portion is embedded in the horizontal part that section is T shapes sealed groove 12.Two sealing ring support rings 42 are respectively T shapes sealed groove 12 with section Two horizontal parts connection.The L-shaped horizontal part upper surface in 42 section of sealing ring support ring and 2 inner wall clearance fit of cylinder barrel.Bearing Groove 11 is embedded with support ring 3.Support ring 3 and the removable connection of 2 inner wall of cylinder barrel.Support ring 3 is circular ring shape, with brace channel 11 Socket, inner ring are embedded in brace channel 11, outer shroud and 2 inner wall clearance fit of cylinder barrel.

When 1 stress of piston moves, particularly radial stress has beat by a relatively large margin.At this point, due to two sealings It is too small to enclose the distance between support ring 42, cannot stop 1 beat of piston.Due to having between support ring 3 and sealing ring support ring 42 Certain distance, piston 1 will not cause piston 1 to have beat by a relatively large margin there are two supporting point for 2 inner wall of cylinder barrel.It avoids 1 outer circle of piston occurs to touch with the wiping of 2 inner wall of cylinder barrel.2 inner wall of cylinder barrel will not damage.

Claims (3)

1. a kind of piston DAS sealings are combined the unit with support ring, it includes：Piston（1）With piston（1）The cylinder barrel of socket（2）, It is characterized in that：The piston（1）Equipped with parallel sealed groove（12）And brace channel（11）, sealed groove（12）It is embedded with DAS combined seal rings（4）, brace channel（11）It is embedded with support ring（3）, the DAS combined seal rings（4）With cylinder barrel（2）It is interior Wall movement is tightly connected, the support ring（3）With cylinder barrel（2）The removable connection of inner wall.

2. a kind of piston DAS sealings according to claim 1 are combined the unit with support ring, it is characterised in that：The sealing Groove（12）Section is T shapes, along piston（1）Outer circle is arranged for one week.

3. a kind of piston DAS sealings according to claim 1 are combined the unit with support ring, it is characterised in that：The bearing Groove（11）Rectangular cross-section, along piston（1）Outer circle is arranged for one week.