CN207848388U - Extrusion pressing type sealing element - Google Patents

Abstract

A kind of extrusion pressing type sealing element, the sealing element include sealing plate, fixed plate and retaining element；One end face of the sealing plate and the end face of piston fit closely, and the end face of piston is completely covered in size, and elasticity, plasticity or elastic-plastic deformation can occur for the sealing plate；One end face of the fixed plate and another end face of sealing plate fit closely, and shapes and sizes are consistent, another end face of the fixed plate is used to be in contact with pottery mud；Fixed plate and sealing plate are fixed on the end face of piston together by the retaining element.Smaller with frictional resistance, stable working has two way seal effect, simple in structure, is easily installed, dismantles and repairs, advantage of low cost.

Description

Extrusion pressing type sealing element

Technical field

The utility model is related to a kind of hydraulic press transmission system technical field of sealing technology, and in particular to a kind of to be squeezed in ceramic body Extrusion pressing type sealing element being used in pressing formation hydraulic press transmission system, for sealing piston and pottery mud faying face.

Background technology

Currently, when pot bank's body formation hydraulic press work, the common extrusion pressing type between piston and pottery mud faying face Moving sealing element, which is mainly zero shape rubber seal (also referred to as circular seal ring) and lippacking, (has V-arrangement rubber seal, U Shape rubber seal, Y shape rubber seal, YX shape rubber seal etc.).Lippacking is all the bullet according to itself (rubber) Property, plasticity or elastic-plastic deformation higher initial contact stress is generated to sealing surfaces, prevent no pressure from making pottery the leakage of mud.Work as liquid When press system works, pressure pottery mud squeezes and effectively struts its sealed lip, is allowed to further be close to sealing surfaces and produce Supplementary contact stress that is higher, increasing with the pressure of pressure pottery mud and increase is given birth to, as a result supplementary contact stress and initial contact Stress cooperatively prevents the leakage of pottery mud.

But frictional resistance is big when being used for dynamic sealing and is easy torsional deformation and (is commonly called as turning over for current zero shape rubber seal Turn)；And the sealed lip contact area of lippacking is smaller, and be prone to wear out, its sealing is significantly reduced after abrasion again and is made With.This two classes sealed product, for ceramic body extrusion molding piston with make pottery mud faying face dynamic sealing when, sealing performance and Service life is not high always, may result in high speed and high pressure green body more demanding for operating pressure, that speed is larger in this way and squeezes Seal request cannot be met when forming, the especially frequent operation in continuous production due to hydraulic press can cause sealing element to need It frequently replaces, reduces production efficiency and also improve production cost.And either zero shape rubber seal or lip packing Part is all hollow ring-type, and effective area is relatively small, the prolonged reciprocatory movement degree of wear faster.

Utility model content

The utility model is directed to the above-mentioned deficiency of existing sealing element, provides that a kind of frictional resistance is smaller, and stable working has Two way seal acts on, simple in structure, is easily installed, dismantles and repairs, low-cost extrusion pressing type sealing element.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of extrusion pressing type sealing element, should Sealing element includes sealing plate, fixed plate and retaining element；One end face of the sealing plate and the end face of piston are closely pasted It closes, and the end face of piston is completely covered in size, elasticity, plasticity or elastic-plastic deformation can occur for the sealing plate；Described consolidates One end face of fixed board and another end face of sealing plate fit closely, and shapes and sizes are consistent, the fixed plate it is another A end face is used to be in contact with pottery mud；Fixed plate and sealing plate are fixed on to the end face of piston together by the retaining element On.

Using above-mentioned sealing structure, when hydraulic press system works, with the propulsion of piston, the end face of make pottery mud and fixed plate Contact, axial stress is transmitted to sealing plate from fixed plate, axial stress forces sealing plate that elasticity, plasticity or elastoplasticity change occurs Shape, sealing plate radially extends and the inboard wall of cylinder block where extrusion piston to the maximum extent always, is sealed with the propulsion of piston Axial stress suffered by plate gradually increases, further generate it is higher with pressure make pottery mud pressure increase and the contact stress that increases, The deformation of sealing plate makes the gap between piston and inboard wall of cylinder block be sealed always, so as to effectively prevent pottery mud from passing through piston Gap between inboard wall of cylinder block enters the piston other side, achievees the effect that be fully sealed.

Preferably, the end surface shape before elasticity, plasticity or elastic-plastic deformation does not occur for the sealing plate and size is big It is small identical as the end surface shape of piston and size, and the completely overlapped setting in the end face of sealing plate and the end face of piston；Using the knot It is even closer that structure can ensure that sealing plate is contacted with the cylinder interior where piston, and either piston promotes or retracts Can sealing plate be come into full contact with cylinder interior, realize two way seal effect.

Preferably, the fixed plate is rigid plate, and the face size of fixed plate and sealing plate being bonded to each other and Shape is identical and completely overlapped.The setting of the structure ensures that pottery mud and fixed plate contact process will not directly act on sealing plate, So that sealing plate is effectively protected, while axial stress can be transmitted to by the fixed plate of rigidity on sealing plate in time, be sealed Plate realizes elasticity, plasticity or elastic-plastic deformation in time, is fully sealed with inboard wall of cylinder block to realize.

Preferably, the retaining element is bolt, screw or adhesive；As long as can ensure fixed plate, sealing The fixed form being securely connected and fixed between plate and piston three adapts to the utility model.

It is bolt as further preferred, described retaining element, and the number of bolt is 1-5.

When as further preferred, described retaining element being bolt, the peace of installation bolt is used in the fixed plate Dress hole includes the through-hole passed through for bolt rod body part and for the accommodating storage tank in the head (nut) of bolt, and the interior table of storage tank Facial contour matches with the contouring head of bolt, to ensure that the top on its head and the end face of fixed plate are mutually neat after bolt is installed It is flat.

Preferably, the sealing plate is cylindrical, thickness 3-10mm, material is silica gel；Using the structure and thickness Degree can ensure that the close contact and sealing with cylinder interior are realized in the lower deformation occurred of sealing plate axial stress effect, while Can guarantee still can keep sealing effect in case of wearing.

Preferably, the fixed plate is cylindrical, thickness 2-5mm, material is stainless steel；Using the structure and thickness Degree, one prevents its too thick influences piston operational efficiency, while effective protection sealing plate and can also make its performance sealing function； Two, columned fixed plate is mutually coincide with the common end surface shape of piston, ensures piston operational effect.

Number as further preferred, described bolt is preferably 5, when for 5 described in 5 bolts with cylinder On the basis of the circular end face of shape fixed plate, the circle centre position one of circular end face is uniformly distributed four along the circumferential edge of circular end face It is a；It can ensure that screw uniformly exerts oneself to fixed plate and sealing plate using the structure, ensure that sealing plate homogeneous deformation and sealing are imitated Fruit.

The use of the above-mentioned sealing structure of the utility model can effectively solve when ceramic body forming pottery mud from piston and cylinder Gap is leaked to the sealing problem of the piston other side between body.In addition, the sealing plate of the utility model is monoblock design (difference In traditional hollow shape sealing ring) big more of its volume ratio ○-shaped seal ring or lippacking, under same pressure certainty its Big more of deflection, to improve sealing performance；Further, since sealing plate is that axial stress is passed through crimp, conversion Radially stress squeezes inboard wall of cylinder block, different with the force way of zero shape seal and lippacking, and sealing plate is one piece It is whole, do not allow more compared to ○-shaped seal ring and lippacking it is easy to wear, to improve service life；Also, this practicality New structure is simple, is easily installed, dismantles and repairs, and has compared to existing sealing element in frequent high pressure, high speed back and forth operation Outstanding performance.The sealing structure of the utility model can be close to sealing surfaces and generate the higher pressure with pressure pottery mud The supplementary contact stress for increasing and increasing, as a result supplementary contact stress and initial contact stress cooperatively prevent pressure pottery mud Leakage.

Description of the drawings

Fig. 1 the utility model decomposes figure structure schematic representation using the extrusion pressing type sealing element of screw connection.

Fig. 2 the utility model installs figure structure schematic representation using the extrusion pressing type sealing element of screw connection.

Fixed plate main view schematic diagram (5 bolts hole) in Fig. 3 the utility model extrusion pressing type sealing elements.

The section view figure structure schematic representation of Fig. 4 Fig. 3.

1 bolt hole fixed plate main view schematic diagram of Fig. 5 the utility model.

2 bolt hole fixed plate main view schematic diagrams of Fig. 6 the utility model.

3 bolt hole fixed plate main view schematic diagrams of Fig. 7 the utility model.

4 bolt hole fixed plate main view schematic diagrams of Fig. 8 the utility model.

Specific implementation mode

The utility model is described in further detail below by embodiment, but the utility model is not limited solely to following reality Apply example.

Embodiment

Such as attached drawing 1-2 extrusion pressing type sealing elements, which includes sealing plate 1, fixed plate 2 and retaining element 3；It is described Sealing plate an end face and the end face of piston 4 fit closely, and the end face of piston, the sealing plate is completely covered in size Elasticity, plasticity or elastic-plastic deformation can occur；One end face of the fixed plate and sealing plate another end face (i.e. not with That end face of the end face fitting of piston) it fits closely, shapes and sizes are consistent, another end face of the fixed plate is used for It is in contact with pottery mud 5；Fixed plate and sealing plate are fixed on the end face of piston together by the retaining element.Using upper Sealing structure is stated, when hydraulic press system works, with the propulsion of piston, pottery mud is contacted with the end face of fixed plate, axial stress Be transmitted to sealing plate from fixed plate, axial stress forces sealing plate that elasticity, plasticity or elastic-plastic deformation occurs, sealing plate is radially Extending and squeezes inboard wall of cylinder block to the maximum extent always, axial stress gradually increases suffered by the propulsion sealing plate with piston, into One step generate it is higher with pressure make pottery mud pressure increase and the contact stress that increases, the deformation of sealing plate make piston in cylinder body Gap between wall is sealed always, so as to effectively prevent pottery mud from entering work by the gap between piston and inboard wall of cylinder block The other side is filled in, achievees the effect that be fully sealed.

Sealing plate described in this practicality do not occur the end surface shape before elasticity, plasticity or elastic-plastic deformation and size with The end surface shape of piston is identical with size, and the completely overlapped setting in the end face of sealing plate and the end face of piston；It can using the structure Contacted with to ensure sealing plate with the cylinder interior where piston even closer, and either promote can or retract for piston So that sealing plate comes into full contact with cylinder interior, two way seal effect is realized.

Fixed plate described in this practicality is rigid plate, and the face size being bonded to each other and shape of fixed plate and sealing plate It is identical and completely overlapped.The setting of the structure ensures that pottery mud and fixed plate contact process will not directly act on sealing plate so that Sealing plate is effectively protected, at the same axial stress can in time by rigidity fixed plate be transmitted on sealing plate, sealing plate and Shi Shixian elasticity, plasticity or elastic-plastic deformation are fully sealed to realize with inboard wall of cylinder block.

Retaining element described in this practicality is bolt, screw or adhesive；As long as can ensure fixed plate, sealing plate and The fixed form being securely connected and fixed between three kinds of piston adapts to the utility model.It is described as further preferred Retaining element be bolt, and the number of bolt is 1-5.

As shown in attached drawing 3-4, when the retaining element is bolt, the installation of installation bolt is used in the fixed plate Hole includes the through-hole 3-1 passed through for bolt rod body part and for the accommodating storage tank 3-2 in the head (nut) of bolt, and storage tank Inner surface profile matches with the contouring head of bolt, to ensure the end face phase on the top and fixed plate on its head after bolt is installed It flushes.I.e. after installation is complete for the end of bolt and fixed plate, sealing plate and piston, the head end of bolt will be with fixed plate End face, and the circumferential lateral surface profile on head is completely bonded with the inside of storage tank, matches and mutually coincide, to prevent from making pottery Mud is pressed into storage tank or through-hole.

As shown in attached drawing 1-2, the sealing plate is cylindrical, and thickness 3-10mm, material is silica gel；Using the structure It can ensure that the close contact and sealing with cylinder interior are realized in the lower deformation occurred of axial stress effect with thickness, while also can Guarantee still can keep sealing effect in case of wearing.

As shown in attached drawing 3,5-8, the fixed plate is cylindrical, and thickness 2-5mm, material is stainless steel；Using this Structure and thickness, one prevents its too thick influence piston operational efficiency, while effective protection sealing plate and can also make its performance Sealing function；Two, columned fixed plate is mutually coincide with the common end surface shape of piston, ensures piston operational effect.

As shown in Fig. 3, as a preferred embodiment, the number of the bolt is preferably 5, when for 5 5 bolts are on the basis of the circular end face of cylindrical fixed plate, the circle centre position one of circular end face, along circular end face Circumferential edge be uniformly distributed four；It can ensure that screw uniformly exerts oneself to fixed plate and sealing plate using the structure, ensure sealing Plate homogeneous deformation and sealing effect.

Certainly, the bolt number of the utility model such as attached drawing 5 can be 1, be located at fixed plate circle centre position；Such as 6 institute of attached drawing Show, can be two, radial distribution is in fixed plate periphery；It can be three, radial distribution is in fixed plate periphery shown in attached drawing 7； It can be four shown in attached drawing 8, one is located at fixed plate circle centre position, and excess-three radial distribution is in fixed plate periphery.

The use of the above-mentioned sealing structure of the utility model can effectively solve when ceramic body forming pottery mud from piston and cylinder Gap is leaked to the sealing problem of the piston other side between body.In addition, the sealing plate of the utility model is monoblock design (difference In traditional hollow shape sealing ring) big more of its volume ratio ○-shaped seal ring and lippacking, under same pressure such as its Big more of deflection, to improve sealing performance；Further, since sealing plate is that axial stress is passed through crimp, conversion Radially stress squeezes inboard wall of cylinder block, different with the force way of zero shape seal and lippacking, and sealing plate is one piece It is whole, do not allow more compared to ○-shaped seal ring and lippacking it is easy to wear, to improve service life；Also, this practicality New structure is simple, is easily installed, dismantles and repairs, and has compared to existing sealing element in frequent high pressure, high speed back and forth operation Outstanding performance.The sealing structure of the utility model can be close to sealing surfaces and generate the higher pressure with pressure pottery mud The supplementary contact stress for increasing and increasing, as a result supplementary contact stress and initial contact stress cooperatively prevent pressure pottery mud Leakage.

Claims (9)

1. a kind of extrusion pressing type sealing element, which includes sealing plate, fixed plate and retaining element；The sealing plate One end face and the end face of piston fit closely, and size is completely covered the end face of piston, the sealing plate can occur elasticity, Plasticity or elastic-plastic deformation；One end face of the fixed plate and another end face of sealing plate fit closely, shape and big Small consistent, another end face of the fixed plate is used to be in contact with pottery mud；By the retaining element by fixed plate and Sealing plate is fixed on the end face of piston together.

2. extrusion pressing type sealing element according to claim 1, it is characterised in that：Elasticity, modeling do not occur for the sealing plate End surface shape and size before property or elastic-plastic deformation is identical as the end surface shape of piston and size, and the end face of sealing plate With the completely overlapped setting in end face of piston.

3. extrusion pressing type sealing element according to claim 1, it is characterised in that：The fixed plate is rigid plate, and solid Fixed board is identical and completely overlapped as the face size being bonded to each other and shape of sealing plate.

4. extrusion pressing type sealing element according to claim 1, it is characterised in that：The retaining element is bolt, screw Or adhesive.

5. extrusion pressing type sealing element according to claim 4, it is characterised in that：The retaining element is bolt, and spiral shell The number of bolt is 1-5.

6. extrusion pressing type sealing element according to claim 5, it is characterised in that：When the retaining element is bolt, institute Mounting hole in the fixed plate stated for installation bolt includes the through-hole that work bolt rod body part passes through and the head captured for bolt Storage tank, and the inner surface profile of storage tank matches with the contouring head of bolt, to ensure its head after bolt installation Top and the end face of fixed plate are flush.

7. extrusion pressing type sealing element according to claim 1, it is characterised in that：The sealing plate is cylindrical, thickness For 3-10mm, material is silica gel.

8. extrusion pressing type sealing element according to claim 3, it is characterised in that：The fixed plate is cylindrical, thickness For 2-5mm, material is stainless steel.

9. extrusion pressing type sealing element according to claim 5, it is characterised in that：The number of the bolt is preferably 5, 5 bolts described in when for 5 are on the basis of the circular end face of cylindrical fixed plate, the circle centre position one of circular end face, edge The circumferential edge for circular end face is uniformly distributed four.